src/gstamlv4l2object.c

/* GStreamer
 * Copyright (C) 2022 <xuesong.jiang@amlogic.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Suite 500,
 * Boston, MA 02110-1335, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <sys/utsname.h>

#ifdef HAVE_GUDEV
#include <gudev/gudev.h>
#endif

#include "ext/videodev2.h"
#include "gstamlv4l2object.h"

#include "gst/gst-i18n-plugin.h"

#include <gst/video/video.h>
#include <gst/allocators/gstdmabuf.h>


GST_DEBUG_CATEGORY_EXTERN(aml_v4l2_debug);
#define GST_CAT_DEFAULT aml_v4l2_debug

#define DEFAULT_PROP_DEVICE_NAME NULL
#define DEFAULT_PROP_DEVICE_FD -1
#define DEFAULT_PROP_FLAGS 0
#define DEFAULT_PROP_TV_NORM 0
#define DEFAULT_PROP_IO_MODE GST_V4L2_IO_AUTO

#define ENCODED_BUFFER_SIZE (4 * 1024 * 1024)
#define LOW_MEM_ENCODED_BUFFER_SIZE (1 * 1024 * 1024)

#define V4L2_CONFIG_PARM_DECODE_CFGINFO (1 << 0)
#define V4L2_CONFIG_PARM_DECODE_PSINFO  (1 << 1)
#define V4L2_CONFIG_PARM_DECODE_HDRINFO (1 << 2)
#define V4L2_CONFIG_PARM_DECODE_CNTINFO (1 << 3)

#define V4L2_CID_USER_AMLOGIC_BASE (V4L2_CID_USER_BASE + 0x1100)
#define AML_V4L2_SET_DRMMODE (V4L2_CID_USER_AMLOGIC_BASE + 0)
#define AML_V4L2_GET_FILMGRAIN_INFO (V4L2_CID_USER_AMLOGIC_BASE + 3)
#define AML_V4L2_DEC_PARMS_CONFIG (V4L2_CID_USER_AMLOGIC_BASE + 7)
#define AML_V4L2_SET_STREAM_MODE (V4L2_CID_USER_AMLOGIC_BASE + 9)
#define AML_V4L2_SET_I_FRAME (V4L2_CID_USER_AMLOGIC_BASE + 14)


enum
{
    PROP_0,
    V4L2_STD_OBJECT_PROPS,
};

/*
 * common format / caps utilities:
 */
typedef enum
{
    GST_V4L2_RAW = 1 << 0,
    GST_V4L2_CODEC = 1 << 1,
    GST_V4L2_TRANSPORT = 1 << 2,
    GST_V4L2_NO_PARSE = 1 << 3,
    GST_V4L2_ALL = 0xffff
} GstAmlV4L2FormatFlags;

typedef struct
{
    guint32 format;
    gboolean dimensions;
    GstAmlV4L2FormatFlags flags;
} GstAmlV4L2FormatDesc;

static const GstAmlV4L2FormatDesc gst_aml_v4l2_formats[] = {
    /* RGB formats */
    {V4L2_PIX_FMT_RGB332, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_ARGB555, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_XRGB555, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_ARGB555X, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_XRGB555X, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_RGB565, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_RGB565X, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_BGR666, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_BGR24, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_RGB24, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_ABGR32, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_XBGR32, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_ARGB32, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_XRGB32, TRUE, GST_V4L2_RAW},

    /* Deprecated Packed RGB Image Formats (alpha ambiguity) */
    {V4L2_PIX_FMT_RGB444, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_RGB555, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_RGB555X, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_BGR32, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_RGB32, TRUE, GST_V4L2_RAW},

    /* Grey formats */
    {V4L2_PIX_FMT_GREY, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y4, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y6, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y10, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y12, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y16, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y16_BE, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y10BPACK, TRUE, GST_V4L2_RAW},

    /* Palette formats */
    {V4L2_PIX_FMT_PAL8, TRUE, GST_V4L2_RAW},

    /* Chrominance formats */
    {V4L2_PIX_FMT_UV8, TRUE, GST_V4L2_RAW},

    /* Luminance+Chrominance formats */
    {V4L2_PIX_FMT_YVU410, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YVU420, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YVU420M, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUYV, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YYUV, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YVYU, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_UYVY, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_VYUY, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV422P, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV411P, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_Y41P, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV444, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV555, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV565, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV32, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV410, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV420, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_YUV420M, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_HI240, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_HM12, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_M420, TRUE, GST_V4L2_RAW},

    /* two planes -- one Y, one Cr + Cb interleaved  */
    {V4L2_PIX_FMT_NV12, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV12M, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV12MT, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV12MT_16X16, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV21, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV21M, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV16, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV16M, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV61, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV61M, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV24, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_NV42, TRUE, GST_V4L2_RAW},

    /* Bayer formats - see http://www.siliconimaging.com/RGB%20Bayer.htm */
    {V4L2_PIX_FMT_SBGGR8, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_SGBRG8, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_SGRBG8, TRUE, GST_V4L2_RAW},
    {V4L2_PIX_FMT_SRGGB8, TRUE, GST_V4L2_RAW},

    /* compressed formats */
    {V4L2_PIX_FMT_MJPEG, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_DV, FALSE, GST_V4L2_TRANSPORT},
    {V4L2_PIX_FMT_MPEG, FALSE, GST_V4L2_TRANSPORT},
    {V4L2_PIX_FMT_FWHT, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_H264, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
    {V4L2_PIX_FMT_H264_NO_SC, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
    {V4L2_PIX_FMT_H264_MVC, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_HEVC, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_H263, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_MPEG1, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_MPEG2, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_MPEG4, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_XVID, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_VC1_ANNEX_G, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_VC1_ANNEX_L, FALSE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_VP8, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
    {V4L2_PIX_FMT_VP9, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
    {V4L2_PIX_FMT_AV1, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
    {V4L2_PIX_FMT_AVS, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
    {V4L2_PIX_FMT_AVS2, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},
    {V4L2_PIX_FMT_AVS3, FALSE, GST_V4L2_CODEC | GST_V4L2_NO_PARSE},

    /*  Vendor-specific formats   */
    {V4L2_PIX_FMT_WNVA, TRUE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_SN9C10X, TRUE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_PWC1, TRUE, GST_V4L2_CODEC},
    {V4L2_PIX_FMT_PWC2, TRUE, GST_V4L2_CODEC},
};

#define GST_AML_V4L2_FORMAT_COUNT (G_N_ELEMENTS(gst_aml_v4l2_formats))

static GSList *gst_aml_v4l2_object_get_format_list(GstAmlV4l2Object *v4l2object);
static gboolean gst_aml_v4l2_set_control(GstAmlV4l2Object *v4l2object, guint ctl);
static gboolean get_amlogic_vdec_parm(GstAmlV4l2Object *v4l2object, struct v4l2_streamparm *streamparm);
static int gst_aml_config_dw(GstAmlV4l2Object *v4l2object, guint32 pixFormat, guint width, guint height, gboolean interlace);

#define GST_TYPE_AML_V4L2_DEVICE_FLAGS (gst_aml_v4l2_device_get_type())
static GType
gst_aml_v4l2_device_get_type(void)
{
    static GType v4l2_device_type = 0;

    if (v4l2_device_type == 0)
    {
        static const GFlagsValue values[] = {
            {V4L2_CAP_VIDEO_CAPTURE, "Device supports video capture", "capture"},
            {V4L2_CAP_VIDEO_OUTPUT, "Device supports video playback", "output"},
            {V4L2_CAP_VIDEO_OVERLAY, "Device supports video overlay", "overlay"},

            {V4L2_CAP_VBI_CAPTURE, "Device supports the VBI capture", "vbi-capture"},
            {V4L2_CAP_VBI_OUTPUT, "Device supports the VBI output", "vbi-output"},

            {V4L2_CAP_TUNER, "Device has a tuner or modulator", "tuner"},
            {V4L2_CAP_AUDIO, "Device has audio inputs or outputs", "audio"},

            {0, NULL, NULL}};

        v4l2_device_type =
            g_flags_register_static("GstAmlV4l2DeviceTypeFlags", values);
    }

    return v4l2_device_type;
}

GType gst_aml_v4l2_io_mode_get_type(void)
{
    static GType v4l2_io_mode = 0;

    if (!v4l2_io_mode)
    {
        static const GEnumValue io_modes[] = {
            {GST_V4L2_IO_AUTO, "GST_V4L2_IO_AUTO", "auto"},
            {GST_V4L2_IO_RW, "GST_V4L2_IO_RW", "rw"},
            {GST_V4L2_IO_MMAP, "GST_V4L2_IO_MMAP", "mmap"},
            {GST_V4L2_IO_USERPTR, "GST_V4L2_IO_USERPTR", "userptr"},
            {GST_V4L2_IO_DMABUF, "GST_V4L2_IO_DMABUF", "dmabuf"},
            {GST_V4L2_IO_DMABUF_IMPORT, "GST_V4L2_IO_DMABUF_IMPORT",
             "dmabuf-import"},

            {0, NULL, NULL}};
        v4l2_io_mode = g_enum_register_static("GstAmlV4l2IOMode", io_modes);
    }
    return v4l2_io_mode;
}

void gst_aml_v4l2_object_install_properties_helper(GObjectClass *gobject_class,
                                                   const char *default_device)
{
    g_object_class_install_property(gobject_class, PROP_DEVICE,
                                    g_param_spec_string("device", "Device", "Device location",
                                                        default_device, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
    g_object_class_install_property(gobject_class, PROP_DEVICE_NAME,
                                    g_param_spec_string("device-name", "Device name",
                                                        "Name of the device", DEFAULT_PROP_DEVICE_NAME,
                                                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
    g_object_class_install_property(gobject_class, PROP_DEVICE_FD,
                                    g_param_spec_int("device-fd", "File descriptor",
                                                     "File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
                                                     G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
    g_object_class_install_property(gobject_class, PROP_FLAGS,
                                    g_param_spec_flags("flags", "Flags", "Device type flags",
                                                       GST_TYPE_AML_V4L2_DEVICE_FLAGS, DEFAULT_PROP_FLAGS,
                                                       G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

    /**
     * GstV4l2Src:brightness:
     *
     * Picture brightness, or more precisely, the black level
     */
    g_object_class_install_property(gobject_class, PROP_BRIGHTNESS,
                                    g_param_spec_int("brightness", "Brightness",
                                                     "Picture brightness, or more precisely, the black level", G_MININT,
                                                     G_MAXINT, 0,
                                                     G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
    /**
     * GstV4l2Src:contrast:
     *
     * Picture contrast or luma gain
     */
    g_object_class_install_property(gobject_class, PROP_CONTRAST,
                                    g_param_spec_int("contrast", "Contrast",
                                                     "Picture contrast or luma gain", G_MININT,
                                                     G_MAXINT, 0,
                                                     G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
    /**
     * GstV4l2Src:saturation:
     *
     * Picture color saturation or chroma gain
     */
    g_object_class_install_property(gobject_class, PROP_SATURATION,
                                    g_param_spec_int("saturation", "Saturation",
                                                     "Picture color saturation or chroma gain", G_MININT,
                                                     G_MAXINT, 0,
                                                     G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));
    /**
     * GstV4l2Src:hue:
     *
     * Hue or color balance
     */
    g_object_class_install_property(gobject_class, PROP_HUE,
                                    g_param_spec_int("hue", "Hue",
                                                     "Hue or color balance", G_MININT,
                                                     G_MAXINT, 0,
                                                     G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | GST_PARAM_CONTROLLABLE));

    /**
     * GstV4l2Src:io-mode:
     *
     * IO Mode
     */
    g_object_class_install_property(gobject_class, PROP_IO_MODE,
                                    g_param_spec_enum("io-mode", "IO mode",
                                                      "I/O mode",
                                                      GST_TYPE_AML_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
                                                      G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    /**
     * GstV4l2Src:extra-controls:
     *
     * Additional v4l2 controls for the device. The controls are identified
     * by the control name (lowercase with '_' for any non-alphanumeric
     * characters).
     *
     * Since: 1.2
     */
    g_object_class_install_property(gobject_class, PROP_EXTRA_CONTROLS,
                                    g_param_spec_boxed("extra-controls", "Extra Controls",
                                                       "Extra v4l2 controls (CIDs) for the device",
                                                       GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    /**
     * GstV4l2Src:pixel-aspect-ratio:
     *
     * The pixel aspect ratio of the device. This overwrites the pixel aspect
     * ratio queried from the device.
     *
     * Since: 1.2
     */
    g_object_class_install_property(gobject_class, PROP_PIXEL_ASPECT_RATIO,
                                    g_param_spec_string("pixel-aspect-ratio", "Pixel Aspect Ratio",
                                                        "Overwrite the pixel aspect ratio of the device", "1/1",
                                                        G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    /**
     * GstV4l2Src:force-aspect-ratio:
     *
     * When enabled, the pixel aspect ratio queried from the device or set
     * with the pixel-aspect-ratio property will be enforced.
     *
     * Since: 1.2
     */
    g_object_class_install_property(gobject_class, PROP_FORCE_ASPECT_RATIO,
                                    g_param_spec_boolean("force-aspect-ratio", "Force aspect ratio",
                                                         "When enabled, the pixel aspect ratio will be enforced", TRUE,
                                                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}

void gst_aml_v4l2_object_install_m2m_properties_helper(GObjectClass *gobject_class)
{
    g_object_class_install_property(gobject_class, PROP_DEVICE,
                                    g_param_spec_string("device", "Device", "Device location",
                                                        NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_DEVICE_NAME,
                                    g_param_spec_string("device-name", "Device name",
                                                        "Name of the device", DEFAULT_PROP_DEVICE_NAME,
                                                        G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_DEVICE_FD,
                                    g_param_spec_int("device-fd", "File descriptor",
                                                     "File descriptor of the device", -1, G_MAXINT, DEFAULT_PROP_DEVICE_FD,
                                                     G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_OUTPUT_IO_MODE,
                                    g_param_spec_enum("output-io-mode", "Output IO mode",
                                                      "Output side I/O mode (matches sink pad)",
                                                      GST_TYPE_AML_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
                                                      G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_CAPTURE_IO_MODE,
                                    g_param_spec_enum("capture-io-mode", "Capture IO mode",
                                                      "Capture I/O mode (matches src pad)",
                                                      GST_TYPE_AML_V4L2_IO_MODE, DEFAULT_PROP_IO_MODE,
                                                      G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_EXTRA_CONTROLS,
                                    g_param_spec_boxed("extra-controls", "Extra Controls",
                                                       "Extra v4l2 controls (CIDs) for the device",
                                                       GST_TYPE_STRUCTURE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_DUMP_FRAME_LOCATION,
                                    g_param_spec_string("dump-frame-location", "dump frame location",
                                                        "Location of the file to write decoder frames", NULL,
                                                        G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_STREAM_MODE,
                                    g_param_spec_boolean("stream-mode", "Configure v4l2 stream mode",
                                                         "TRUE for stream mode, FALSE for frame mode",
                                                         FALSE,
                                                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

    g_object_class_install_property(gobject_class, PROP_LOW_LATENCY_MODE,
                                    g_param_spec_boolean("low-latency-mode", "set low latency mode",
                                                         "enable is TURE, disable is FALSE, default is disable",
                                                         FALSE,
                                                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

   g_object_class_install_property (gobject_class, PROP_CC_DATA,
                                    g_param_spec_boolean ("enable-cc-data",
                                                          "enable get cc data",
                                                          "0: disable; 1: enable", FALSE, G_PARAM_READWRITE));

   g_object_class_install_property (gobject_class, PROP_ENABLE_NR,
                                    g_param_spec_boolean ("enable-nr",
                                                          "enable nr in di",
                                                          "0: disable; 1: enable", FALSE, G_PARAM_READWRITE));

    g_object_class_install_property(gobject_class, PROP_DECODING_ERROR_FRAMES,
                                    g_param_spec_int("decoding-error-frames", "decoding error frames",
                                                         "get number of decoding error frames",
                                                         0, G_MAXINT32, 0, G_PARAM_READABLE));
    g_object_class_install_property(gobject_class, PROP_LOW_MEMORY_MODE,
                                    g_param_spec_boolean("low-memory", "low memory mode",
                                                         "Reduce memory usage if possible,default is disable",
                                                         FALSE,
                                                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
    g_object_class_install_property(gobject_class, PROP_I_FRAME_MODE,
                                    g_param_spec_boolean("iframe-mode", "use I frame mode",
                                                         "use for speed play",
                                                         FALSE,
                                                         G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));

}

/* Support for 32bit off_t, this wrapper is casting off_t to gint64 */
#ifdef HAVE_LIBV4L2
#if SIZEOF_OFF_T < 8

static gpointer
v4l2_mmap_wrapper(gpointer start, gsize length, gint prot, gint flags, gint fd,
                  off_t offset)
{
    return v4l2_mmap(start, length, prot, flags, fd, (gint64)offset);
}

#define v4l2_mmap v4l2_mmap_wrapper

#endif /* SIZEOF_OFF_T < 8 */
#endif /* HAVE_LIBV4L2 */

GstAmlV4l2Object *
gst_aml_v4l2_object_new(GstElement *element,
                        GstObject *debug_object,
                        enum v4l2_buf_type type,
                        const char *default_device,
                        GstAmlV4l2GetInOutFunction get_in_out_func,
                        GstAmlV4l2SetInOutFunction set_in_out_func,
                        GstAmlV4l2UpdateFpsFunction update_fps_func)
{
    GstAmlV4l2Object *v4l2object;

    /*
     * some default values
     */
    v4l2object = g_new0(GstAmlV4l2Object, 1);

    if ((V4L2_BUF_TYPE_VIDEO_CAPTURE == type || V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE == type))
    {
        const char *default_mode = getenv("GST_DEFAULT_V4L2_BUF_MODE");
        GST_DEBUG("amlmodbuf GST_AML_DEFAULT_V4L2_BUF_MODE:%s", default_mode);
        //v4l2object->req_mode = GST_V4L2_IO_DMABUF_IMPORT;
        if (default_mode)
        {
            if (strcmp(default_mode, "DMA_BUF_IMPORT") == 0)
                v4l2object->req_mode = GST_V4L2_IO_DMABUF_IMPORT;
            else if (strcmp(default_mode, "DMA_BUF") == 0)
                v4l2object->req_mode = GST_V4L2_IO_DMABUF;
            GST_DEBUG("amlmodbuf set default buf default_mode:%d", v4l2object->req_mode);
        }
    }

    v4l2object->type = type;
    v4l2object->formats = NULL;

    v4l2object->element = element;
    v4l2object->dbg_obj = debug_object;
    v4l2object->get_in_out_func = get_in_out_func;
    v4l2object->set_in_out_func = set_in_out_func;
    v4l2object->update_fps_func = update_fps_func;

    v4l2object->video_fd = -1;
    v4l2object->active = FALSE;
    v4l2object->videodev = g_strdup(default_device);

    v4l2object->norms = NULL;
    v4l2object->channels = NULL;
    v4l2object->colors = NULL;

    v4l2object->keep_aspect = TRUE;
    v4l2object->stream_mode = FALSE;
    v4l2object->have_set_par = FALSE;
    v4l2object->enable_cc_data = FALSE;
    v4l2object->enable_nr = FALSE;
    v4l2object->low_latency_mode = FALSE;
    v4l2object->low_memory_mode = FALSE;
    v4l2object->iframe_mode = FALSE;

    v4l2object->n_v4l2_planes = 0;

    v4l2object->no_initial_format = FALSE;

    /* We now disable libv4l2 by default, but have an env to enable it. */
#ifdef HAVE_LIBV4L2
    if (g_getenv("GST_V4L2_USE_LIBV4L2"))
    {
        v4l2object->fd_open = v4l2_fd_open;
        v4l2object->close = v4l2_close;
        v4l2object->dup = v4l2_dup;
        v4l2object->ioctl = v4l2_ioctl;
        v4l2object->read = v4l2_read;
        v4l2object->mmap = v4l2_mmap;
        v4l2object->munmap = v4l2_munmap;
    }
    else
#endif
    {
        v4l2object->fd_open = NULL;
        v4l2object->close = close;
        v4l2object->dup = dup;
        v4l2object->ioctl = ioctl;
        v4l2object->read = read;
        v4l2object->mmap = mmap;
        v4l2object->munmap = munmap;
    }
    v4l2object->poll = gst_poll_new(TRUE);
    v4l2object->can_wait_event = FALSE;
    v4l2object->can_poll_device = TRUE;
    v4l2object->tvin_port = -1;

    v4l2object->dumpframefile = NULL;

    /* jxsdbg resolution switching */
    v4l2object->old_other_pool = NULL;
    v4l2object->old_old_other_pool = NULL;
    v4l2object->outstanding_buf_num = 0;
    v4l2object->num_error_frames = 0;
    return v4l2object;
}

static gboolean gst_aml_v4l2_object_clear_format_list(GstAmlV4l2Object *v4l2object);

void gst_aml_v4l2_object_destroy(GstAmlV4l2Object *v4l2object)
{
    g_return_if_fail(v4l2object != NULL);

    g_free(v4l2object->videodev);

    g_free(v4l2object->channel);

    if (v4l2object->formats)
    {
        gst_aml_v4l2_object_clear_format_list(v4l2object);
    }

    if (v4l2object->probed_caps)
    {
        gst_caps_unref(v4l2object->probed_caps);
    }

    if (v4l2object->extra_controls)
    {
        gst_structure_free(v4l2object->extra_controls);
    }

    gst_poll_free(v4l2object->poll);

    g_free(v4l2object->dumpframefile);

    /* jxsdbg resolution switching */
    if (v4l2object->old_other_pool)
    {
        gst_object_unref(v4l2object->old_other_pool);
        v4l2object->old_other_pool = NULL;
    }
    if (v4l2object->old_old_other_pool)
    {
        gst_object_unref(v4l2object->old_old_other_pool);
        v4l2object->old_old_other_pool = NULL;
    }
    v4l2object->outstanding_buf_num = 0;

    g_free(v4l2object);
}

static gboolean
gst_aml_v4l2_object_clear_format_list(GstAmlV4l2Object *v4l2object)
{
    g_slist_foreach(v4l2object->formats, (GFunc)g_free, NULL);
    g_slist_free(v4l2object->formats);
    v4l2object->formats = NULL;

    return TRUE;
}

static gint
gst_aml_v4l2_object_prop_to_cid(guint prop_id)
{
    gint cid = -1;

    switch (prop_id)
    {
    case PROP_BRIGHTNESS:
        cid = V4L2_CID_BRIGHTNESS;
        break;
    case PROP_CONTRAST:
        cid = V4L2_CID_CONTRAST;
        break;
    case PROP_SATURATION:
        cid = V4L2_CID_SATURATION;
        break;
    case PROP_HUE:
        cid = V4L2_CID_HUE;
        break;
    default:
        GST_WARNING("unmapped property id: %d", prop_id);
    }
    return cid;
}

gboolean
gst_aml_v4l2_object_set_property_helper(GstAmlV4l2Object *v4l2object,
                                        guint prop_id, const GValue *value, GParamSpec *pspec)
{
    switch (prop_id)
    {
    case PROP_DEVICE:
        g_free(v4l2object->videodev);
        v4l2object->videodev = g_value_dup_string(value);
        break;
    case PROP_BRIGHTNESS:
    case PROP_CONTRAST:
    case PROP_SATURATION:
    case PROP_HUE:
    {
        gint cid = gst_aml_v4l2_object_prop_to_cid(prop_id);

        if (cid != -1)
        {
            if (GST_AML_V4L2_IS_OPEN(v4l2object))
            {
                gst_aml_v4l2_set_attribute(v4l2object, cid, g_value_get_int(value));
            }
        }
        return TRUE;
    }
    break;
    case PROP_IO_MODE:
        v4l2object->req_mode = g_value_get_enum(value);
        break;
    case PROP_CAPTURE_IO_MODE:
        g_return_val_if_fail(!V4L2_TYPE_IS_OUTPUT(v4l2object->type), FALSE);
        v4l2object->req_mode = g_value_get_enum(value);
        break;
    case PROP_OUTPUT_IO_MODE:
        g_return_val_if_fail(V4L2_TYPE_IS_OUTPUT(v4l2object->type), FALSE);
        v4l2object->req_mode = g_value_get_enum(value);
        break;
    case PROP_EXTRA_CONTROLS:
    {
        const GstStructure *s = gst_value_get_structure(value);

        if (v4l2object->extra_controls)
            gst_structure_free(v4l2object->extra_controls);

        v4l2object->extra_controls = s ? gst_structure_copy(s) : NULL;
        if (GST_AML_V4L2_IS_OPEN(v4l2object))
            gst_aml_v4l2_set_controls(v4l2object, v4l2object->extra_controls);
        break;
    }
    case PROP_PIXEL_ASPECT_RATIO:
        if (v4l2object->par)
        {
            g_value_unset(v4l2object->par);
            g_free(v4l2object->par);
        }
        v4l2object->par = g_new0(GValue, 1);
        g_value_init(v4l2object->par, GST_TYPE_FRACTION);
        if (!g_value_transform(value, v4l2object->par))
        {
            g_warning("Could not transform string to aspect ratio");
            gst_value_set_fraction(v4l2object->par, 1, 1);
        }

        v4l2object->have_set_par = TRUE;
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "set PAR to %d/%d",
                         gst_value_get_fraction_numerator(v4l2object->par),
                         gst_value_get_fraction_denominator(v4l2object->par));
        break;
    case PROP_FORCE_ASPECT_RATIO:
        v4l2object->keep_aspect = g_value_get_boolean(value);
        break;
    case PROP_DUMP_FRAME_LOCATION:
        g_free(v4l2object->dumpframefile);
        v4l2object->dumpframefile = g_value_dup_string(value);
        break;
    case PROP_STREAM_MODE:
        v4l2object->stream_mode = g_value_get_boolean(value);
        break;
    case PROP_LOW_LATENCY_MODE:
        v4l2object->low_latency_mode = g_value_get_boolean(value);
        GST_DEBUG_OBJECT(v4l2object, "set low latency: %d",v4l2object->low_latency_mode);
        break;
    case PROP_CC_DATA:
        v4l2object->enable_cc_data = g_value_get_boolean(value);
        GST_DEBUG_OBJECT(v4l2object, "enable cc data: %d",v4l2object->enable_cc_data);
        break;
    case PROP_ENABLE_NR:
        v4l2object->enable_nr = g_value_get_boolean(value);
        GST_DEBUG_OBJECT(v4l2object, "enable nr: %d",v4l2object->enable_nr);
        break;
    case PROP_LOW_MEMORY_MODE:
        v4l2object->low_memory_mode = g_value_get_boolean(value);
        GST_DEBUG_OBJECT(v4l2object, "set low mem: %d",v4l2object->low_latency_mode);
        break;
    case PROP_I_FRAME_MODE:
        v4l2object->iframe_mode = g_value_get_boolean(value);
        GST_DEBUG_OBJECT(v4l2object, "set I frame mode: %d",v4l2object->iframe_mode);
        break;
    default:
        return FALSE;
        break;
    }
    return TRUE;
}

gboolean
gst_aml_v4l2_object_get_property_helper(GstAmlV4l2Object *v4l2object,
                                        guint prop_id, GValue *value, GParamSpec *pspec)
{
    switch (prop_id)
    {
    case PROP_DEVICE:
        g_value_set_string(value, v4l2object->videodev);
        break;
    case PROP_DEVICE_NAME:
    {
        const guchar *name = NULL;

        if (GST_AML_V4L2_IS_OPEN(v4l2object))
            name = v4l2object->vcap.card;

        g_value_set_string(value, (gchar *)name);
        break;
    }
    case PROP_DEVICE_FD:
    {
        if (GST_AML_V4L2_IS_OPEN(v4l2object))
            g_value_set_int(value, v4l2object->video_fd);
        else
            g_value_set_int(value, DEFAULT_PROP_DEVICE_FD);
        break;
    }
    case PROP_FLAGS:
    {
        guint flags = 0;

        if (GST_AML_V4L2_IS_OPEN(v4l2object))
        {
            flags |= v4l2object->device_caps &
                     (V4L2_CAP_VIDEO_CAPTURE |
                      V4L2_CAP_VIDEO_OUTPUT |
                      V4L2_CAP_VIDEO_OVERLAY |
                      V4L2_CAP_VBI_CAPTURE |
                      V4L2_CAP_VBI_OUTPUT | V4L2_CAP_TUNER | V4L2_CAP_AUDIO);

            if (v4l2object->device_caps & V4L2_CAP_VIDEO_CAPTURE_MPLANE)
                flags |= V4L2_CAP_VIDEO_CAPTURE;

            if (v4l2object->device_caps & V4L2_CAP_VIDEO_OUTPUT_MPLANE)
                flags |= V4L2_CAP_VIDEO_OUTPUT;
        }
        g_value_set_flags(value, flags);
        break;
    }
    case PROP_BRIGHTNESS:
    case PROP_CONTRAST:
    case PROP_SATURATION:
    case PROP_HUE:
    {
        gint cid = gst_aml_v4l2_object_prop_to_cid(prop_id);

        if (cid != -1)
        {
            if (GST_AML_V4L2_IS_OPEN(v4l2object))
            {
                gint v;
                if (gst_aml_v4l2_get_attribute(v4l2object, cid, &v))
                {
                    g_value_set_int(value, v);
                }
            }
        }
        return TRUE;
    }
    break;
    case PROP_IO_MODE:
        g_value_set_enum(value, v4l2object->req_mode);
        break;
    case PROP_CAPTURE_IO_MODE:
        g_return_val_if_fail(!V4L2_TYPE_IS_OUTPUT(v4l2object->type), FALSE);
        g_value_set_enum(value, v4l2object->req_mode);
        break;
    case PROP_OUTPUT_IO_MODE:
        g_return_val_if_fail(V4L2_TYPE_IS_OUTPUT(v4l2object->type), FALSE);
        g_value_set_enum(value, v4l2object->req_mode);
        break;
    case PROP_EXTRA_CONTROLS:
        gst_value_set_structure(value, v4l2object->extra_controls);
        break;
    case PROP_PIXEL_ASPECT_RATIO:
        if (v4l2object->par)
            g_value_transform(v4l2object->par, value);
        break;
    case PROP_FORCE_ASPECT_RATIO:
        g_value_set_boolean(value, v4l2object->keep_aspect);
        break;
    case PROP_DUMP_FRAME_LOCATION:
        g_value_set_string(value, v4l2object->dumpframefile);
        break;
    case PROP_STREAM_MODE:
        g_value_set_boolean(value, v4l2object->stream_mode);
        break;
    case PROP_CC_DATA:
        g_value_set_boolean(value, v4l2object->enable_cc_data);
        break;
    case PROP_ENABLE_NR:
        g_value_set_boolean(value, v4l2object->enable_nr);
        break;
    case PROP_LOW_LATENCY_MODE:
        g_value_set_boolean(value, v4l2object->low_latency_mode);
        break;
    case PROP_DECODING_ERROR_FRAMES:
        g_value_set_int(value, v4l2object->num_error_frames);
        break;
    case PROP_LOW_MEMORY_MODE:
        g_value_set_boolean(value, v4l2object->low_memory_mode);
        break;
    case PROP_I_FRAME_MODE:
        g_value_set_boolean(value, v4l2object->iframe_mode);
        break;
    default:
        return FALSE;
        break;
    }
    return TRUE;
}

static void
gst_aml_v4l2_get_driver_min_buffers(GstAmlV4l2Object *v4l2object)
{
    struct v4l2_control control = {
        0,
    };

    g_return_if_fail(GST_AML_V4L2_IS_OPEN(v4l2object));

    if (V4L2_TYPE_IS_OUTPUT(v4l2object->type))
        control.id = V4L2_CID_MIN_BUFFERS_FOR_OUTPUT;
    else
        control.id = V4L2_CID_MIN_BUFFERS_FOR_CAPTURE;

    if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_G_CTRL, &control) == 0)
    {
        GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                         "driver requires a minimum of %d buffers", control.value);
        v4l2object->min_buffers = control.value;
    }
    else
    {
        v4l2object->min_buffers = 0;
    }
}

gboolean
gst_aml_v4l2_object_open(GstAmlV4l2Object *v4l2object)
{
    if (!gst_aml_v4l2_open(v4l2object))
        return FALSE;

    return TRUE;
}

gboolean
gst_aml_v4l2_object_open_shared(GstAmlV4l2Object *v4l2object, GstAmlV4l2Object *other)
{
    gboolean ret;

    ret = gst_aml_v4l2_dup(v4l2object, other);

    if (ret && !V4L2_TYPE_IS_OUTPUT(v4l2object->type))
    {
        gst_poll_fd_init(&v4l2object->pollfd);
        v4l2object->pollfd.fd = v4l2object->video_fd;
        gst_poll_add_fd(v4l2object->poll, &v4l2object->pollfd);
        /* used for dequeue event */
        gst_poll_fd_ctl_read(v4l2object->poll, &v4l2object->pollfd, TRUE);
        gst_poll_fd_ctl_pri(v4l2object->poll, &v4l2object->pollfd, TRUE);
    }

    return ret;
}

gboolean
gst_aml_v4l2_object_close(GstAmlV4l2Object *v4l2object)
{
    if (!gst_aml_v4l2_close(v4l2object))
        return FALSE;

    gst_caps_replace(&v4l2object->probed_caps, NULL);

    /* reset our copy of the device caps */
    v4l2object->device_caps = 0;

    if (v4l2object->formats)
    {
        gst_aml_v4l2_object_clear_format_list(v4l2object);
    }

    if (v4l2object->par)
    {
        g_value_unset(v4l2object->par);
        g_free(v4l2object->par);
        v4l2object->par = NULL;
    }

    if (v4l2object->fps)
    {
        g_value_unset(v4l2object->fps);
        g_free(v4l2object->fps);
        v4l2object->fps = NULL;
    }

    if (v4l2object->channel)
    {
        g_free(v4l2object->channel);
        v4l2object->channel = NULL;
    }

    return TRUE;
}

static struct v4l2_fmtdesc *
gst_aml_v4l2_object_get_format_from_fourcc(GstAmlV4l2Object *v4l2object,
                                           guint32 fourcc)
{
    struct v4l2_fmtdesc *fmt;
    GSList *walk;

    if (fourcc == 0)
        return NULL;

    walk = gst_aml_v4l2_object_get_format_list(v4l2object);
    while (walk)
    {
        fmt = (struct v4l2_fmtdesc *)walk->data;
        if (fmt->pixelformat == fourcc)
            return fmt;
        /* special case for jpeg */
        if (fmt->pixelformat == V4L2_PIX_FMT_MJPEG ||
            fmt->pixelformat == V4L2_PIX_FMT_JPEG ||
            fmt->pixelformat == V4L2_PIX_FMT_PJPG)
        {
            if (fourcc == V4L2_PIX_FMT_JPEG || fourcc == V4L2_PIX_FMT_MJPEG ||
                fourcc == V4L2_PIX_FMT_PJPG)
            {
                return fmt;
            }
        }
        walk = g_slist_next(walk);
    }

    return NULL;
}

/* complete made up ranking, the values themselves are meaningless */
/* These ranks MUST be X such that X<<15 fits on a signed int - see
   the comment at the end of gst_aml_v4l2_object_format_get_rank. */
#define YUV_BASE_RANK 1000
#define JPEG_BASE_RANK 500
#define DV_BASE_RANK 200
#define RGB_BASE_RANK 100
#define YUV_ODD_BASE_RANK 50
#define RGB_ODD_BASE_RANK 25
#define BAYER_BASE_RANK 15
#define S910_BASE_RANK 10
#define GREY_BASE_RANK 5
#define PWC_BASE_RANK 1

static gint
gst_aml_v4l2_object_format_get_rank(const struct v4l2_fmtdesc *fmt)
{
    guint32 fourcc = fmt->pixelformat;
    gboolean emulated = ((fmt->flags & V4L2_FMT_FLAG_EMULATED) != 0);
    gint rank = 0;

    switch (fourcc)
    {
    case V4L2_PIX_FMT_MJPEG:
    case V4L2_PIX_FMT_PJPG:
        rank = JPEG_BASE_RANK;
        break;
    case V4L2_PIX_FMT_JPEG:
        rank = JPEG_BASE_RANK + 1;
        break;
    case V4L2_PIX_FMT_MPEG: /* MPEG          */
        rank = JPEG_BASE_RANK + 2;
        break;

    case V4L2_PIX_FMT_RGB332:
    case V4L2_PIX_FMT_ARGB555:
    case V4L2_PIX_FMT_XRGB555:
    case V4L2_PIX_FMT_RGB555:
    case V4L2_PIX_FMT_ARGB555X:
    case V4L2_PIX_FMT_XRGB555X:
    case V4L2_PIX_FMT_RGB555X:
    case V4L2_PIX_FMT_BGR666:
    case V4L2_PIX_FMT_RGB565:
    case V4L2_PIX_FMT_RGB565X:
    case V4L2_PIX_FMT_RGB444:
    case V4L2_PIX_FMT_Y4:
    case V4L2_PIX_FMT_Y6:
    case V4L2_PIX_FMT_Y10:
    case V4L2_PIX_FMT_Y12:
    case V4L2_PIX_FMT_Y10BPACK:
    case V4L2_PIX_FMT_YUV555:
    case V4L2_PIX_FMT_YUV565:
    case V4L2_PIX_FMT_YUV32:
    case V4L2_PIX_FMT_NV12MT_16X16:
    case V4L2_PIX_FMT_NV42:
    case V4L2_PIX_FMT_H264_MVC:
        rank = RGB_ODD_BASE_RANK;
        break;

    case V4L2_PIX_FMT_RGB24:
    case V4L2_PIX_FMT_BGR24:
        rank = RGB_BASE_RANK - 1;
        break;

    case V4L2_PIX_FMT_RGB32:
    case V4L2_PIX_FMT_BGR32:
    case V4L2_PIX_FMT_ABGR32:
    case V4L2_PIX_FMT_XBGR32:
    case V4L2_PIX_FMT_ARGB32:
    case V4L2_PIX_FMT_XRGB32:
        rank = RGB_BASE_RANK;
        break;

    case V4L2_PIX_FMT_GREY: /*  8  Greyscale     */
        rank = GREY_BASE_RANK;
        break;

    case V4L2_PIX_FMT_NV12:   /* 12  Y/CbCr 4:2:0  */
    case V4L2_PIX_FMT_NV12M:  /* Same as NV12      */
    case V4L2_PIX_FMT_NV12MT: /* NV12 64x32 tile   */
    case V4L2_PIX_FMT_NV21:   /* 12  Y/CrCb 4:2:0  */
    case V4L2_PIX_FMT_NV21M:  /* Same as NV21      */
    case V4L2_PIX_FMT_YYUV:   /* 16  YUV 4:2:2     */
    case V4L2_PIX_FMT_HI240:  /*  8  8-bit color   */
    case V4L2_PIX_FMT_NV16:   /* 16  Y/CbCr 4:2:2  */
    case V4L2_PIX_FMT_NV16M:  /* Same as NV16      */
    case V4L2_PIX_FMT_NV61:   /* 16  Y/CrCb 4:2:2  */
    case V4L2_PIX_FMT_NV61M:  /* Same as NV61      */
    case V4L2_PIX_FMT_NV24:   /* 24  Y/CrCb 4:4:4  */
        rank = YUV_ODD_BASE_RANK;
        break;

    case V4L2_PIX_FMT_YVU410: /* YVU9,  9 bits per pixel */
        rank = YUV_BASE_RANK + 3;
        break;
    case V4L2_PIX_FMT_YUV410: /* YUV9,  9 bits per pixel */
        rank = YUV_BASE_RANK + 2;
        break;
    case V4L2_PIX_FMT_YUV420: /* I420, 12 bits per pixel */
    case V4L2_PIX_FMT_YUV420M:
        rank = YUV_BASE_RANK + 7;
        break;
    case V4L2_PIX_FMT_YUYV: /* YUY2, 16 bits per pixel */
        rank = YUV_BASE_RANK + 10;
        break;
    case V4L2_PIX_FMT_YVU420: /* YV12, 12 bits per pixel */
        rank = YUV_BASE_RANK + 6;
        break;
    case V4L2_PIX_FMT_UYVY: /* UYVY, 16 bits per pixel */
        rank = YUV_BASE_RANK + 9;
        break;
    case V4L2_PIX_FMT_YUV444:
        rank = YUV_BASE_RANK + 6;
        break;
    case V4L2_PIX_FMT_Y41P: /* Y41P, 12 bits per pixel */
        rank = YUV_BASE_RANK + 5;
        break;
    case V4L2_PIX_FMT_YUV411P: /* Y41B, 12 bits per pixel */
        rank = YUV_BASE_RANK + 4;
        break;
    case V4L2_PIX_FMT_YUV422P: /* Y42B, 16 bits per pixel */
        rank = YUV_BASE_RANK + 8;
        break;

    case V4L2_PIX_FMT_DV:
        rank = DV_BASE_RANK;
        break;

    case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
        rank = 0;
        break;

    case V4L2_PIX_FMT_SBGGR8:
    case V4L2_PIX_FMT_SGBRG8:
    case V4L2_PIX_FMT_SGRBG8:
    case V4L2_PIX_FMT_SRGGB8:
        rank = BAYER_BASE_RANK;
        break;

    case V4L2_PIX_FMT_SN9C10X:
        rank = S910_BASE_RANK;
        break;

    case V4L2_PIX_FMT_PWC1:
        rank = PWC_BASE_RANK;
        break;
    case V4L2_PIX_FMT_PWC2:
        rank = PWC_BASE_RANK;
        break;

    default:
        rank = 0;
        break;
    }

    /* All ranks are below 1<<15 so a shift by 15
     * will a) make all non-emulated formats larger
     * than emulated and b) will not overflow
     */
    if (!emulated)
        rank <<= 15;

    return rank;
}

static gint
format_cmp_func(gconstpointer a, gconstpointer b)
{
    const struct v4l2_fmtdesc *fa = a;
    const struct v4l2_fmtdesc *fb = b;

    if (fa->pixelformat == fb->pixelformat)
        return 0;

    return gst_aml_v4l2_object_format_get_rank(fb) -
           gst_aml_v4l2_object_format_get_rank(fa);
}

/******************************************************
 * gst_aml_v4l2_object_fill_format_list():
 *   create list of supported capture formats
 * return value: TRUE on success, FALSE on error
 ******************************************************/
static gboolean
gst_aml_v4l2_object_fill_format_list(GstAmlV4l2Object *v4l2object,
                                     enum v4l2_buf_type type)
{
    gint n;
    struct v4l2_fmtdesc *format;

    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "getting src format enumerations");

    /* format enumeration */
    for (n = 0;; n++)
    {
        format = g_new0(struct v4l2_fmtdesc, 1);

        format->index = n;
        format->type = type;

        if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_ENUM_FMT, format) < 0)
        {
            if (errno == EINVAL)
            {
                g_free(format);
                break; /* end of enumeration */
            }
            else
            {
                goto failed;
            }
        }

        GST_LOG_OBJECT(v4l2object->dbg_obj, "index:       %u", format->index);
        GST_LOG_OBJECT(v4l2object->dbg_obj, "type:        %d", format->type);
        GST_LOG_OBJECT(v4l2object->dbg_obj, "flags:       %08x", format->flags);
        GST_LOG_OBJECT(v4l2object->dbg_obj, "description: '%s'",
                       format->description);
        GST_LOG_OBJECT(v4l2object->dbg_obj, "pixelformat: %" GST_FOURCC_FORMAT,
                       GST_FOURCC_ARGS(format->pixelformat));


        if (V4L2_PIX_FMT_YUV420M == format->pixelformat || V4L2_PIX_FMT_YUV420 == format->pixelformat)
        {
            GST_LOG_OBJECT(v4l2object->dbg_obj, "aml v4l2 driver didn't real support YU12 and YM12, ignore it");
            continue;
        }

        /* sort formats according to our preference;  we do this, because caps
         * are probed in the order the formats are in the list, and the order of
         * formats in the final probed caps matters for things like fixation */
        v4l2object->formats = g_slist_insert_sorted(v4l2object->formats, format,
                                                    (GCompareFunc)format_cmp_func);
    }

#ifndef GST_DISABLE_GST_DEBUG
    {
        GSList *l;

        GST_INFO_OBJECT(v4l2object->dbg_obj, "got %d format(s):", n);
        for (l = v4l2object->formats; l != NULL; l = l->next)
        {
            format = l->data;

            GST_INFO_OBJECT(v4l2object->dbg_obj,
                            "  %" GST_FOURCC_FORMAT "%s", GST_FOURCC_ARGS(format->pixelformat),
                            ((format->flags & V4L2_FMT_FLAG_EMULATED)) ? " (emulated)" : "");
        }
    }
#endif

    return TRUE;

    /* ERRORS */
failed:
{
    g_free(format);

    if (v4l2object->element)
        return FALSE;

    GST_ELEMENT_ERROR(v4l2object->element, RESOURCE, SETTINGS,
                      (_("Failed to enumerate possible video formats device '%s' can work "
                         "with"),
                       v4l2object->videodev),
                      ("Failed to get number %d in pixelformat enumeration for %s. (%d - %s)",
                       n, v4l2object->videodev, errno, g_strerror(errno)));

    return FALSE;
}
}

/*
 * Get the list of supported capture formats, a list of
 * <code>struct v4l2_fmtdesc</code>.
 */
static GSList *
gst_aml_v4l2_object_get_format_list(GstAmlV4l2Object *v4l2object)
{
    if (!v4l2object->formats)
    {

        /* check usual way */
        gst_aml_v4l2_object_fill_format_list(v4l2object, v4l2object->type);

        /* if our driver supports multi-planar
         * and if formats are still empty then we can workaround driver bug
         * by also looking up formats as if our device was not supporting
         * multiplanar */
        if (!v4l2object->formats)
        {
            switch (v4l2object->type)
            {
            case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
                gst_aml_v4l2_object_fill_format_list(v4l2object,
                                                     V4L2_BUF_TYPE_VIDEO_CAPTURE);
                break;

            case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
                gst_aml_v4l2_object_fill_format_list(v4l2object,
                                                     V4L2_BUF_TYPE_VIDEO_OUTPUT);
                break;

            default:
                break;
            }
        }
    }
    return v4l2object->formats;
}

static GstVideoFormat
gst_aml_v4l2_object_v4l2fourcc_to_video_format(guint32 fourcc)
{
    GstVideoFormat format;

    switch (fourcc)
    {
    case V4L2_PIX_FMT_GREY: /*  8  Greyscale     */
        format = GST_VIDEO_FORMAT_GRAY8;
        break;
    case V4L2_PIX_FMT_Y16:
        format = GST_VIDEO_FORMAT_GRAY16_LE;
        break;
    case V4L2_PIX_FMT_Y16_BE:
        format = GST_VIDEO_FORMAT_GRAY16_BE;
        break;
    case V4L2_PIX_FMT_XRGB555:
    case V4L2_PIX_FMT_RGB555:
        format = GST_VIDEO_FORMAT_RGB15;
        break;
    case V4L2_PIX_FMT_XRGB555X:
    case V4L2_PIX_FMT_RGB555X:
        format = GST_VIDEO_FORMAT_BGR15;
        break;
    case V4L2_PIX_FMT_RGB565:
        format = GST_VIDEO_FORMAT_RGB16;
        break;
    case V4L2_PIX_FMT_RGB24:
        format = GST_VIDEO_FORMAT_RGB;
        break;
    case V4L2_PIX_FMT_BGR24:
        format = GST_VIDEO_FORMAT_BGR;
        break;
    case V4L2_PIX_FMT_XRGB32:
    case V4L2_PIX_FMT_RGB32:
        format = GST_VIDEO_FORMAT_xRGB;
        break;
    case V4L2_PIX_FMT_XBGR32:
    case V4L2_PIX_FMT_BGR32:
        format = GST_VIDEO_FORMAT_BGRx;
        break;
    case V4L2_PIX_FMT_ABGR32:
        format = GST_VIDEO_FORMAT_BGRA;
        break;
    case V4L2_PIX_FMT_ARGB32:
        format = GST_VIDEO_FORMAT_ARGB;
        break;
    case V4L2_PIX_FMT_NV12:
    case V4L2_PIX_FMT_NV12M:
        format = GST_VIDEO_FORMAT_NV12;
        break;
    case V4L2_PIX_FMT_NV12MT:
        format = GST_VIDEO_FORMAT_NV12_64Z32;
        break;
    case V4L2_PIX_FMT_NV21:
    case V4L2_PIX_FMT_NV21M:
        format = GST_VIDEO_FORMAT_NV21;
        break;
    case V4L2_PIX_FMT_YVU410:
        format = GST_VIDEO_FORMAT_YVU9;
        break;
    case V4L2_PIX_FMT_YUV410:
        format = GST_VIDEO_FORMAT_YUV9;
        break;
    case V4L2_PIX_FMT_YUV420:
    case V4L2_PIX_FMT_YUV420M:
        format = GST_VIDEO_FORMAT_I420;
        break;
    case V4L2_PIX_FMT_YUYV:
        format = GST_VIDEO_FORMAT_YUY2;
        break;
    case V4L2_PIX_FMT_YVU420:
        format = GST_VIDEO_FORMAT_YV12;
        break;
    case V4L2_PIX_FMT_UYVY:
        format = GST_VIDEO_FORMAT_UYVY;
        break;
    case V4L2_PIX_FMT_YUV411P:
        format = GST_VIDEO_FORMAT_Y41B;
        break;
    case V4L2_PIX_FMT_YUV422P:
        format = GST_VIDEO_FORMAT_Y42B;
        break;
    case V4L2_PIX_FMT_YVYU:
        format = GST_VIDEO_FORMAT_YVYU;
        break;
    case V4L2_PIX_FMT_NV16:
    case V4L2_PIX_FMT_NV16M:
        format = GST_VIDEO_FORMAT_NV16;
        break;
    case V4L2_PIX_FMT_NV61:
    case V4L2_PIX_FMT_NV61M:
        format = GST_VIDEO_FORMAT_NV61;
        break;
    case V4L2_PIX_FMT_NV24:
        format = GST_VIDEO_FORMAT_NV24;
        break;
    default:
        format = GST_VIDEO_FORMAT_UNKNOWN;
        break;
    }

    return format;
}

static gboolean
gst_amL_v4l2_object_v4l2fourcc_is_rgb(guint32 fourcc)
{
    gboolean ret = FALSE;

    switch (fourcc)
    {
    case V4L2_PIX_FMT_XRGB555:
    case V4L2_PIX_FMT_RGB555:
    case V4L2_PIX_FMT_XRGB555X:
    case V4L2_PIX_FMT_RGB555X:
    case V4L2_PIX_FMT_RGB565:
    case V4L2_PIX_FMT_RGB24:
    case V4L2_PIX_FMT_BGR24:
    case V4L2_PIX_FMT_XRGB32:
    case V4L2_PIX_FMT_RGB32:
    case V4L2_PIX_FMT_XBGR32:
    case V4L2_PIX_FMT_BGR32:
    case V4L2_PIX_FMT_ABGR32:
    case V4L2_PIX_FMT_ARGB32:
    case V4L2_PIX_FMT_SBGGR8:
    case V4L2_PIX_FMT_SGBRG8:
    case V4L2_PIX_FMT_SGRBG8:
    case V4L2_PIX_FMT_SRGGB8:
        ret = TRUE;
        break;
    default:
        break;
    }

    return ret;
}

static GstStructure *
gst_aml_v4l2_object_v4l2fourcc_to_bare_struct(guint32 fourcc)
{
    GstStructure *structure = NULL;

    switch (fourcc)
    {
    case V4L2_PIX_FMT_MJPEG: /* Motion-JPEG */
        structure = gst_structure_new_empty("video/mjpeg");
        break;
    case V4L2_PIX_FMT_MPEG1:
        structure = gst_structure_new("video/mpeg",
                                      "mpegversion", G_TYPE_INT, 1, NULL);
        gst_structure_set(structure, "systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
        GST_DEBUG("aml set mpeg1 systemstream to false");
        break;
    case V4L2_PIX_FMT_MPEG2:
        structure = gst_structure_new("video/mpeg",
                                      "mpegversion", G_TYPE_INT, 2, NULL);
        gst_structure_set(structure, "systemstream", G_TYPE_BOOLEAN, FALSE, NULL);
        GST_DEBUG("aml set mpeg2 systemstream to false");
        break;
    case V4L2_PIX_FMT_MPEG4:
    case V4L2_PIX_FMT_XVID:
        structure = gst_structure_new("video/mpeg",
                                      "mpegversion", G_TYPE_INT, 4, "systemstream",
                                      G_TYPE_BOOLEAN, FALSE, NULL);
        break;
    case V4L2_PIX_FMT_FWHT:
        structure = gst_structure_new_empty("video/x-fwht");
        break;
    case V4L2_PIX_FMT_H263:
        structure = gst_structure_new("video/x-h263",
                                      "variant", G_TYPE_STRING, "itu", NULL);
        break;
    case V4L2_PIX_FMT_H264: /* H.264 */
        structure = gst_structure_new("video/x-h264",
                                      "stream-format", G_TYPE_STRING, "byte-stream", "alignment",
                                      G_TYPE_STRING, "au", NULL);
        break;
    case V4L2_PIX_FMT_H264_NO_SC:
        structure = gst_structure_new("video/x-h264",
                                      "stream-format", G_TYPE_STRING, "avc", "alignment",
                                      G_TYPE_STRING, "au", NULL);
        break;
    case V4L2_PIX_FMT_HEVC: /* H.265 */
        structure = gst_structure_new("video/x-h265",
                                      "stream-format", G_TYPE_STRING, "byte-stream", "alignment",
                                      G_TYPE_STRING, "au", NULL);
        break;
    case V4L2_PIX_FMT_VC1_ANNEX_G:
    case V4L2_PIX_FMT_VC1_ANNEX_L:
        structure = gst_structure_new("video/x-wmv",
                                      "wmvversion", G_TYPE_INT, 3, "format", G_TYPE_STRING, "WVC1", NULL);
        break;
    case V4L2_PIX_FMT_VP8:
        structure = gst_structure_new_empty("video/x-vp8");
        break;
    case V4L2_PIX_FMT_VP9:
        structure = gst_structure_new_empty("video/x-vp9");
        break;
    case V4L2_PIX_FMT_AV1:
        structure = gst_structure_new_empty("video/x-av1");
        break;
    case V4L2_PIX_FMT_AVS:
        structure = gst_structure_new_empty("video/x-avs");
        break;
    case V4L2_PIX_FMT_AVS2:
        structure = gst_structure_new_empty("video/x-avs2");
        break;
    case V4L2_PIX_FMT_AVS3:
        structure = gst_structure_new_empty("video/x-avs3");
        break;
    case V4L2_PIX_FMT_GREY: /*  8  Greyscale     */
    case V4L2_PIX_FMT_Y16:
    case V4L2_PIX_FMT_Y16_BE:
    case V4L2_PIX_FMT_XRGB555:
    case V4L2_PIX_FMT_RGB555:
    case V4L2_PIX_FMT_XRGB555X:
    case V4L2_PIX_FMT_RGB555X:
    case V4L2_PIX_FMT_RGB565:
    case V4L2_PIX_FMT_RGB24:
    case V4L2_PIX_FMT_BGR24:
    case V4L2_PIX_FMT_RGB32:
    case V4L2_PIX_FMT_XRGB32:
    case V4L2_PIX_FMT_ARGB32:
    case V4L2_PIX_FMT_BGR32:
    case V4L2_PIX_FMT_XBGR32:
    case V4L2_PIX_FMT_ABGR32:
    case V4L2_PIX_FMT_NV12: /* 12  Y/CbCr 4:2:0  */
    case V4L2_PIX_FMT_NV12M:
    case V4L2_PIX_FMT_NV12MT:
    case V4L2_PIX_FMT_NV21: /* 12  Y/CrCb 4:2:0  */
    case V4L2_PIX_FMT_NV21M:
    case V4L2_PIX_FMT_NV16: /* 16  Y/CbCr 4:2:2  */
    case V4L2_PIX_FMT_NV16M:
    case V4L2_PIX_FMT_NV61: /* 16  Y/CrCb 4:2:2  */
    case V4L2_PIX_FMT_NV61M:
    case V4L2_PIX_FMT_NV24: /* 24  Y/CrCb 4:4:4  */
    case V4L2_PIX_FMT_YVU410:
    case V4L2_PIX_FMT_YUV410:
    case V4L2_PIX_FMT_YUV420: /* I420/IYUV */
    case V4L2_PIX_FMT_YUV420M:
    case V4L2_PIX_FMT_YUYV:
    case V4L2_PIX_FMT_YVU420:
    case V4L2_PIX_FMT_UYVY:
    case V4L2_PIX_FMT_YUV422P:
    case V4L2_PIX_FMT_YVYU:
    case V4L2_PIX_FMT_YUV411P:
    {
        GstVideoFormat format;
        format = gst_aml_v4l2_object_v4l2fourcc_to_video_format(fourcc);
        if (format != GST_VIDEO_FORMAT_UNKNOWN)
            structure = gst_structure_new("video/x-raw",
                                          "format", G_TYPE_STRING, gst_video_format_to_string(format), NULL);
        break;
    }
    case V4L2_PIX_FMT_DV:
        structure =
            gst_structure_new("video/x-dv", "systemstream", G_TYPE_BOOLEAN, TRUE,
                              NULL);
        break;
    case V4L2_PIX_FMT_MPEG: /* MPEG          */
        structure = gst_structure_new("video/mpegts",
                                      "systemstream", G_TYPE_BOOLEAN, TRUE, NULL);
        break;
    case V4L2_PIX_FMT_WNVA: /* Winnov hw compres */
        break;
    case V4L2_PIX_FMT_SBGGR8:
    case V4L2_PIX_FMT_SGBRG8:
    case V4L2_PIX_FMT_SGRBG8:
    case V4L2_PIX_FMT_SRGGB8:
        structure = gst_structure_new("video/x-bayer", "format", G_TYPE_STRING,
                                      fourcc == V4L2_PIX_FMT_SBGGR8 ? "bggr" : fourcc == V4L2_PIX_FMT_SGBRG8 ? "gbrg"
                                                                           : fourcc == V4L2_PIX_FMT_SGRBG8   ? "grbg"
                                                                                                             :
                                                                                                           /* fourcc == V4L2_PIX_FMT_SRGGB8 ? */ "rggb",
                                      NULL);
        break;
    case V4L2_PIX_FMT_SN9C10X:
        structure = gst_structure_new_empty("video/x-sonix");
        break;
    case V4L2_PIX_FMT_PWC1:
        structure = gst_structure_new_empty("video/x-pwc1");
        break;
    case V4L2_PIX_FMT_PWC2:
        structure = gst_structure_new_empty("video/x-pwc2");
        break;
    case V4L2_PIX_FMT_RGB332:
    case V4L2_PIX_FMT_BGR666:
    case V4L2_PIX_FMT_ARGB555X:
    case V4L2_PIX_FMT_RGB565X:
    case V4L2_PIX_FMT_RGB444:
    case V4L2_PIX_FMT_YYUV:  /* 16  YUV 4:2:2     */
    case V4L2_PIX_FMT_HI240: /*  8  8-bit color   */
    case V4L2_PIX_FMT_Y4:
    case V4L2_PIX_FMT_Y6:
    case V4L2_PIX_FMT_Y10:
    case V4L2_PIX_FMT_Y12:
    case V4L2_PIX_FMT_Y10BPACK:
    case V4L2_PIX_FMT_YUV444:
    case V4L2_PIX_FMT_YUV555:
    case V4L2_PIX_FMT_YUV565:
    case V4L2_PIX_FMT_Y41P:
    case V4L2_PIX_FMT_YUV32:
    case V4L2_PIX_FMT_NV12MT_16X16:
    case V4L2_PIX_FMT_NV42:
    case V4L2_PIX_FMT_H264_MVC:
    default:
        GST_DEBUG("Unsupported fourcc 0x%08x %" GST_FOURCC_FORMAT,
                  fourcc, GST_FOURCC_ARGS(fourcc));
        break;
    }

    return structure;
}

GstStructure *
gst_aml_v4l2_object_v4l2fourcc_to_structure(guint32 fourcc)
{
    GstStructure *template;
    gint i;

    template = gst_aml_v4l2_object_v4l2fourcc_to_bare_struct(fourcc);

    if (template == NULL)
        goto done;

    for (i = 0; i < GST_AML_V4L2_FORMAT_COUNT; i++)
    {
        if (gst_aml_v4l2_formats[i].format != fourcc)
            continue;

        if (gst_aml_v4l2_formats[i].dimensions)
        {
            gst_structure_set(template,
                              "width", GST_TYPE_INT_RANGE, 1, GST_AML_V4L2_MAX_SIZE,
                              "height", GST_TYPE_INT_RANGE, 1, GST_AML_V4L2_MAX_SIZE,
                              "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
        }
        break;
    }

done:
    return template;
}

static GstCaps *
gst_aml_v4l2_object_get_caps_helper(GstAmlV4L2FormatFlags flags)
{
    GstStructure *structure;
    GstCaps *caps;
    guint i;

    caps = gst_caps_new_empty();
    for (i = 0; i < GST_AML_V4L2_FORMAT_COUNT; i++)
    {

        if ((gst_aml_v4l2_formats[i].flags & flags) == 0)
            continue;

        structure =
            gst_aml_v4l2_object_v4l2fourcc_to_bare_struct(gst_aml_v4l2_formats[i].format);

        if (structure)
        {
            GstStructure *alt_s = NULL;

            if (gst_aml_v4l2_formats[i].dimensions)
            {
                gst_structure_set(structure,
                                  "width", GST_TYPE_INT_RANGE, 1, GST_AML_V4L2_MAX_SIZE,
                                  "height", GST_TYPE_INT_RANGE, 1, GST_AML_V4L2_MAX_SIZE,
                                  "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
            }

            switch (gst_aml_v4l2_formats[i].format)
            {
            case V4L2_PIX_FMT_RGB32:
                alt_s = gst_structure_copy(structure);
                gst_structure_set(alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
                break;
            case V4L2_PIX_FMT_BGR32:
                alt_s = gst_structure_copy(structure);
                gst_structure_set(alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
            default:
                break;
            }

            gst_caps_append_structure(caps, structure);

            if (alt_s)
                gst_caps_append_structure(caps, alt_s);
        }
    }

    return gst_caps_simplify(caps);
}

GstCaps *
gst_aml_v4l2_object_get_all_caps(void)
{
    static GstCaps *caps = NULL;

    if (g_once_init_enter(&caps))
    {
        GstCaps *all_caps = gst_aml_v4l2_object_get_caps_helper(GST_V4L2_ALL);
        GST_MINI_OBJECT_FLAG_SET(all_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
        g_once_init_leave(&caps, all_caps);
    }

    return caps;
}

GstCaps *
gst_aml_v4l2_object_get_raw_caps(void)
{
    static GstCaps *caps = NULL;

    if (g_once_init_enter(&caps))
    {
        GstCaps *raw_caps = gst_aml_v4l2_object_get_caps_helper(GST_V4L2_RAW);
        GST_MINI_OBJECT_FLAG_SET(raw_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
        g_once_init_leave(&caps, raw_caps);
    }

    return caps;
}

GstCaps *
gst_aml_v4l2_object_get_codec_caps(void)
{
    static GstCaps *caps = NULL;

    if (g_once_init_enter(&caps))
    {
        GstCaps *codec_caps = gst_aml_v4l2_object_get_caps_helper(GST_V4L2_CODEC);
        GST_MINI_OBJECT_FLAG_SET(codec_caps, GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED);
        g_once_init_leave(&caps, codec_caps);
    }

    return caps;
}

/* collect data for the given caps
 * @caps: given input caps
 * @format: location for the v4l format
 * @w/@h: location for width and height
 * @fps_n/@fps_d: location for framerate
 * @size: location for expected size of the frame or 0 if unknown
 */
static gboolean
gst_aml_v4l2_object_get_caps_info(GstAmlV4l2Object *v4l2object, GstCaps *caps,
                                  struct v4l2_fmtdesc **format, GstVideoInfo *info)
{
    GstStructure *structure;
    guint32 fourcc = 0, fourcc_nc = 0;
    const gchar *mimetype;
    struct v4l2_fmtdesc *fmt = NULL;

    GST_DEBUG_OBJECT(v4l2object, "got caps: %" GST_PTR_FORMAT, caps);

    structure = gst_caps_get_structure(caps, 0);

    mimetype = gst_structure_get_name(structure);

    if (!gst_video_info_from_caps(info, caps))
        goto invalid_format;

    if (g_str_equal(mimetype, "video/x-raw"))
    {
        switch (GST_VIDEO_INFO_FORMAT(info))
        {
        case GST_VIDEO_FORMAT_I420:
            fourcc = V4L2_PIX_FMT_YUV420;
            fourcc_nc = V4L2_PIX_FMT_YUV420M;
            break;
        case GST_VIDEO_FORMAT_YUY2:
            fourcc = V4L2_PIX_FMT_YUYV;
            break;
        case GST_VIDEO_FORMAT_UYVY:
            fourcc = V4L2_PIX_FMT_UYVY;
            break;
        case GST_VIDEO_FORMAT_YV12:
            fourcc = V4L2_PIX_FMT_YVU420;
            break;
        case GST_VIDEO_FORMAT_Y41B:
            fourcc = V4L2_PIX_FMT_YUV411P;
            break;
        case GST_VIDEO_FORMAT_Y42B:
            fourcc = V4L2_PIX_FMT_YUV422P;
            break;
        case GST_VIDEO_FORMAT_NV12:
            fourcc = V4L2_PIX_FMT_NV12;
            fourcc_nc = V4L2_PIX_FMT_NV12M;
            break;
        case GST_VIDEO_FORMAT_NV12_64Z32:
            fourcc_nc = V4L2_PIX_FMT_NV12MT;
            break;
        case GST_VIDEO_FORMAT_NV21:
            fourcc = V4L2_PIX_FMT_NV21;
            fourcc_nc = V4L2_PIX_FMT_NV21M;
            break;
        case GST_VIDEO_FORMAT_NV16:
            fourcc = V4L2_PIX_FMT_NV16;
            fourcc_nc = V4L2_PIX_FMT_NV16M;
            break;
        case GST_VIDEO_FORMAT_NV61:
            fourcc = V4L2_PIX_FMT_NV61;
            fourcc_nc = V4L2_PIX_FMT_NV61M;
            break;
        case GST_VIDEO_FORMAT_NV24:
            fourcc = V4L2_PIX_FMT_NV24;
            break;
        case GST_VIDEO_FORMAT_YVYU:
            fourcc = V4L2_PIX_FMT_YVYU;
            break;
        case GST_VIDEO_FORMAT_RGB15:
            fourcc = V4L2_PIX_FMT_RGB555;
            fourcc_nc = V4L2_PIX_FMT_XRGB555;
            break;
        case GST_VIDEO_FORMAT_RGB16:
            fourcc = V4L2_PIX_FMT_RGB565;
            break;
        case GST_VIDEO_FORMAT_RGB:
            fourcc = V4L2_PIX_FMT_RGB24;
            break;
        case GST_VIDEO_FORMAT_BGR:
            fourcc = V4L2_PIX_FMT_BGR24;
            break;
        case GST_VIDEO_FORMAT_xRGB:
            fourcc = V4L2_PIX_FMT_RGB32;
            fourcc_nc = V4L2_PIX_FMT_XRGB32;
            break;
        case GST_VIDEO_FORMAT_ARGB:
            fourcc = V4L2_PIX_FMT_RGB32;
            fourcc_nc = V4L2_PIX_FMT_ARGB32;
            break;
        case GST_VIDEO_FORMAT_BGRx:
            fourcc = V4L2_PIX_FMT_BGR32;
            fourcc_nc = V4L2_PIX_FMT_XBGR32;
            break;
        case GST_VIDEO_FORMAT_BGRA:
            fourcc = V4L2_PIX_FMT_BGR32;
            fourcc_nc = V4L2_PIX_FMT_ABGR32;
            break;
        case GST_VIDEO_FORMAT_GRAY8:
            fourcc = V4L2_PIX_FMT_GREY;
            break;
        case GST_VIDEO_FORMAT_GRAY16_LE:
            fourcc = V4L2_PIX_FMT_Y16;
            break;
        case GST_VIDEO_FORMAT_GRAY16_BE:
            fourcc = V4L2_PIX_FMT_Y16_BE;
            break;
        case GST_VIDEO_FORMAT_BGR15:
            fourcc = V4L2_PIX_FMT_RGB555X;
            fourcc_nc = V4L2_PIX_FMT_XRGB555X;
            break;
        default:
            break;
        }
    }
    else
    {
        if (g_str_equal(mimetype, "video/mpegts"))
        {
            fourcc = V4L2_PIX_FMT_MPEG;
        }
        else if (g_str_equal(mimetype, "video/x-dv"))
        {
            fourcc = V4L2_PIX_FMT_DV;
        }
        else if (g_str_equal(mimetype, "video/mjpeg"))
        {
            fourcc = V4L2_PIX_FMT_JPEG;
        }
        else if (g_str_equal(mimetype, "video/mpeg"))
        {
            gint version;
            if (gst_structure_get_int(structure, "mpegversion", &version))
            {
                switch (version)
                {
                case 1:
                    fourcc = V4L2_PIX_FMT_MPEG1;
                    break;
                case 2:
                    fourcc = V4L2_PIX_FMT_MPEG2;
                    break;
                case 4:
                    fourcc = V4L2_PIX_FMT_MPEG4;
                    fourcc_nc = V4L2_PIX_FMT_XVID;
                    break;
                default:
                    break;
                }
            }
        }
        else if (g_str_equal(mimetype, "video/x-fwht"))
        {
            fourcc = V4L2_PIX_FMT_FWHT;
        }
        else if (g_str_equal(mimetype, "video/x-h263"))
        {
            fourcc = V4L2_PIX_FMT_H263;
        }
        else if (g_str_equal(mimetype, "video/x-h264"))
        {
            const gchar *stream_format =
                gst_structure_get_string(structure, "stream-format");
            if (g_str_equal(stream_format, "avc"))
                fourcc = V4L2_PIX_FMT_H264_NO_SC;
            else
                fourcc = V4L2_PIX_FMT_H264;
        }
        else if (g_str_equal(mimetype, "video/x-h265"))
        {
            fourcc = V4L2_PIX_FMT_HEVC;
        }
        else if (g_str_equal(mimetype, "video/x-vp8"))
        {
            fourcc = V4L2_PIX_FMT_VP8;
        }
        else if (g_str_equal(mimetype, "video/x-vp9"))
        {
            fourcc = V4L2_PIX_FMT_VP9;
        }
        else if (g_str_equal(mimetype, "video/x-av1"))
        {
            fourcc = V4L2_PIX_FMT_AV1;
        }
        else if (g_str_equal(mimetype, "video/x-avs"))
        {
            fourcc = V4L2_PIX_FMT_AVS;
        }
        else if (g_str_equal(mimetype, "video/x-avs2"))
        {
            fourcc = V4L2_PIX_FMT_AVS2;
        }
        else if (g_str_equal(mimetype, "video/x-avs3"))
        {
            fourcc = V4L2_PIX_FMT_AVS3;
        }
        else if (g_str_equal(mimetype, "video/x-bayer"))
        {
            const gchar *vformat = gst_structure_get_string(structure, "format");
            if (vformat)
            {
                if (!g_ascii_strcasecmp(vformat, "bggr"))
                    fourcc = V4L2_PIX_FMT_SBGGR8;
                else if (!g_ascii_strcasecmp(vformat, "gbrg"))
                    fourcc = V4L2_PIX_FMT_SGBRG8;
                else if (!g_ascii_strcasecmp(vformat, "grbg"))
                    fourcc = V4L2_PIX_FMT_SGRBG8;
                else if (!g_ascii_strcasecmp(vformat, "rggb"))
                    fourcc = V4L2_PIX_FMT_SRGGB8;
            }
        }
        else if (g_str_equal(mimetype, "video/x-sonix"))
        {
            fourcc = V4L2_PIX_FMT_SN9C10X;
        }
        else if (g_str_equal(mimetype, "video/x-pwc1"))
        {
            fourcc = V4L2_PIX_FMT_PWC1;
        }
        else if (g_str_equal(mimetype, "video/x-pwc2"))
        {
            fourcc = V4L2_PIX_FMT_PWC2;
        }
        else
        {
          GST_ERROR("Unknown video codec %s.", mimetype);
        }
    }

    /* Prefer the non-contiguous if supported */
    v4l2object->prefered_non_contiguous = TRUE;

    if (fourcc_nc)
        fmt = gst_aml_v4l2_object_get_format_from_fourcc(v4l2object, fourcc_nc);
    else if (fourcc == 0)
        goto unhandled_format;

    if (fmt == NULL)
    {
        fmt = gst_aml_v4l2_object_get_format_from_fourcc(v4l2object, fourcc);
        v4l2object->prefered_non_contiguous = FALSE;
    }

    if (fmt == NULL)
        goto unsupported_format;

    *format = fmt;

    return TRUE;

    /* ERRORS */
invalid_format:
{
    GST_DEBUG_OBJECT(v4l2object, "invalid format");
    return FALSE;
}
unhandled_format:
{
    GST_DEBUG_OBJECT(v4l2object, "unhandled format");
    return FALSE;
}
unsupported_format:
{
    GST_DEBUG_OBJECT(v4l2object, "unsupported format");
    return FALSE;
}
}

static gboolean
gst_aml_v4l2_object_get_nearest_size(GstAmlV4l2Object *v4l2object,
                                     guint32 pixelformat, gint *width, gint *height);

static void
gst_aml_v4l2_object_add_aspect_ratio(GstAmlV4l2Object *v4l2object, GstStructure *s)
{
    if (v4l2object->keep_aspect && v4l2object->par)
        gst_structure_set_value(s, "pixel-aspect-ratio", v4l2object->par);
}

/* returns TRUE if the value was changed in place, otherwise FALSE */
static gboolean
gst_aml_v4l2src_value_simplify(GValue *val)
{
    /* simplify list of one value to one value */
    if (GST_VALUE_HOLDS_LIST(val) && gst_value_list_get_size(val) == 1)
    {
        const GValue *list_val;
        GValue new_val = G_VALUE_INIT;

        list_val = gst_value_list_get_value(val, 0);
        g_value_init(&new_val, G_VALUE_TYPE(list_val));
        g_value_copy(list_val, &new_val);
        g_value_unset(val);
        *val = new_val;
        return TRUE;
    }

    return FALSE;
}

static gboolean
gst_aml_v4l2_object_get_interlace_mode(enum v4l2_field field,
                                       GstVideoInterlaceMode *interlace_mode)
{
    switch (field)
    {
    case V4L2_FIELD_ANY:
        GST_ERROR("Driver bug detected - check driver with v4l2-compliance from http://git.linuxtv.org/v4l-utils.git\n");
        /* fallthrough */
    case V4L2_FIELD_NONE:
        *interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
        return TRUE;
    case V4L2_FIELD_INTERLACED:
    case V4L2_FIELD_INTERLACED_TB:
    case V4L2_FIELD_INTERLACED_BT:
        *interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
        return TRUE;
    default:
        GST_ERROR("Unknown enum v4l2_field %d", field);
        return FALSE;
    }
}

static gboolean
gst_aml_v4l2_object_get_colorspace(struct v4l2_format *fmt,
                                   GstVideoColorimetry *cinfo)
{
    gboolean is_rgb =
        gst_amL_v4l2_object_v4l2fourcc_is_rgb(fmt->fmt.pix.pixelformat);
    enum v4l2_colorspace colorspace;
    enum v4l2_quantization range;
    enum v4l2_ycbcr_encoding matrix;
    enum v4l2_xfer_func transfer;
    gboolean ret = TRUE;

    if (V4L2_TYPE_IS_MULTIPLANAR(fmt->type))
    {
        colorspace = fmt->fmt.pix_mp.colorspace;
        range = fmt->fmt.pix_mp.quantization;
        matrix = fmt->fmt.pix_mp.ycbcr_enc;
        transfer = fmt->fmt.pix_mp.xfer_func;
    }
    else
    {
        colorspace = fmt->fmt.pix.colorspace;
        range = fmt->fmt.pix.quantization;
        matrix = fmt->fmt.pix.ycbcr_enc;
        transfer = fmt->fmt.pix.xfer_func;
    }
    GST_DEBUG("colorspace:%d, range:%d, matrix:%d, transfer:%d", colorspace, range, matrix, transfer);
    GST_DEBUG("cinfo update 1 time | range:%d, matrix:%d, transfer:%d, primaries:%d", cinfo->range, cinfo->matrix, cinfo->transfer, cinfo->primaries);

    /* First step, set the defaults for each primaries */
    switch (colorspace)
    {
    case V4L2_COLORSPACE_SMPTE170M:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
        cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE170M;
        break;
    case V4L2_COLORSPACE_REC709:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
        cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
        break;
    case V4L2_COLORSPACE_SRGB:
    case V4L2_COLORSPACE_JPEG:
        cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
        cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT709;
        break;
    case V4L2_COLORSPACE_OPRGB:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
        cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_ADOBERGB;
        break;
    case V4L2_COLORSPACE_BT2020:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
        cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT2020;
        break;
    case V4L2_COLORSPACE_SMPTE240M:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
        cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_SMPTE240M;
        break;
    case V4L2_COLORSPACE_470_SYSTEM_M:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
        cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470M;
        break;
    case V4L2_COLORSPACE_470_SYSTEM_BG:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
        cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_BT470BG;
        break;
    case V4L2_COLORSPACE_RAW:
        /* Explicitly unknown */
        cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
        cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
        cinfo->primaries = GST_VIDEO_COLOR_PRIMARIES_UNKNOWN;
        break;
    default:
        GST_DEBUG("Unknown enum v4l2_colorspace %d", colorspace);
        ret = FALSE;
        break;
    }
    GST_DEBUG("cinfo update 2 time | range:%d, matrix:%d, transfer:%d, primaries:%d", cinfo->range, cinfo->matrix, cinfo->transfer, cinfo->primaries);

    if (!ret)
        goto done;

    /* Second step, apply any custom variation */
    switch (range)
    {
    case V4L2_QUANTIZATION_FULL_RANGE:
        cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
        break;
    case V4L2_QUANTIZATION_LIM_RANGE:
        cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        break;
    case V4L2_QUANTIZATION_DEFAULT:
        /* replicated V4L2_MAP_QUANTIZATION_DEFAULT macro behavior */
        if (is_rgb && colorspace == V4L2_COLORSPACE_BT2020)
            cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        else if (is_rgb || matrix == V4L2_YCBCR_ENC_XV601 || matrix == V4L2_YCBCR_ENC_XV709 || colorspace == V4L2_COLORSPACE_JPEG)
            cinfo->range = GST_VIDEO_COLOR_RANGE_0_255;
        else
            cinfo->range = GST_VIDEO_COLOR_RANGE_16_235;
        break;
    default:
        GST_WARNING("Unknown enum v4l2_quantization value %d", range);
        cinfo->range = GST_VIDEO_COLOR_RANGE_UNKNOWN;
        break;
    }
    GST_DEBUG("cinfo update 3 time | range:%d, matrix:%d, transfer:%d, primaries:%d", cinfo->range, cinfo->matrix, cinfo->transfer, cinfo->primaries);

    switch (matrix)
    {
    case V4L2_YCBCR_ENC_XV601:
    case V4L2_YCBCR_ENC_SYCC:
        GST_FIXME("XV601 and SYCC not defined, assuming 601");
        /* fallthrough */
    case V4L2_YCBCR_ENC_601:
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT601;
        break;
    case V4L2_YCBCR_ENC_XV709:
        GST_FIXME("XV709 not defined, assuming 709");
        /* fallthrough */
    case V4L2_YCBCR_ENC_709:
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT709;
        break;
    case V4L2_YCBCR_ENC_BT2020_CONST_LUM:
        GST_FIXME("BT2020 with constant luma is not defined, assuming BT2020");
        /* fallthrough */
    case V4L2_YCBCR_ENC_BT2020:
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_BT2020;
        break;
    case V4L2_YCBCR_ENC_SMPTE240M:
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_SMPTE240M;
        break;
    case V4L2_YCBCR_ENC_DEFAULT:
        /* nothing, just use defaults for colorspace */
        break;
    default:
        GST_WARNING("Unknown enum v4l2_ycbcr_encoding value %d", matrix);
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_UNKNOWN;
        break;
    }
    GST_DEBUG("cinfo update 4 time | range:%d, matrix:%d, transfer:%d, primaries:%d", cinfo->range, cinfo->matrix, cinfo->transfer, cinfo->primaries);

    /* Set identity matrix for R'G'B' formats to avoid creating
     * confusion. This though is cosmetic as it's now properly ignored by
     * the video info API and videoconvert. */
    if (is_rgb)
        cinfo->matrix = GST_VIDEO_COLOR_MATRIX_RGB;

    switch (transfer)
    {
    case V4L2_XFER_FUNC_709:
        if (colorspace == V4L2_COLORSPACE_BT2020 && fmt->fmt.pix.height >= 2160)
            cinfo->transfer = GST_VIDEO_TRANSFER_BT2020_12;
        else
            cinfo->transfer = GST_VIDEO_TRANSFER_BT709;
        break;
    case V4L2_XFER_FUNC_SRGB:
        cinfo->transfer = GST_VIDEO_TRANSFER_SRGB;
        break;
    case V4L2_XFER_FUNC_OPRGB:
        cinfo->transfer = GST_VIDEO_TRANSFER_ADOBERGB;
        break;
    case V4L2_XFER_FUNC_SMPTE240M:
        cinfo->transfer = GST_VIDEO_TRANSFER_SMPTE240M;
        break;
    case V4L2_XFER_FUNC_NONE:
        cinfo->transfer = GST_VIDEO_TRANSFER_GAMMA10;
        break;
    case V4L2_XFER_FUNC_DEFAULT:
        /* nothing, just use defaults for colorspace */
        break;
    default:
        GST_WARNING("Unknown enum v4l2_xfer_func value %d", transfer);
        cinfo->transfer = GST_VIDEO_TRANSFER_UNKNOWN;
        break;
    }
    GST_DEBUG("cinfo update 5 time | range:%d, matrix:%d, transfer:%d, primaries:%d", cinfo->range, cinfo->matrix, cinfo->transfer, cinfo->primaries);

done:
    return ret;
}

static int
gst_aml_v4l2_object_try_fmt(GstAmlV4l2Object *v4l2object,
                            struct v4l2_format *try_fmt)
{
    int fd = v4l2object->video_fd;
    struct v4l2_format fmt;
    int r;

    memcpy(&fmt, try_fmt, sizeof(fmt));
    r = v4l2object->ioctl(fd, VIDIOC_TRY_FMT, &fmt);

    if (r < 0 && errno == ENOTTY)
    {
        /* The driver might not implement TRY_FMT, in which case we will try
           S_FMT to probe */
        if (GST_AML_V4L2_IS_ACTIVE(v4l2object))
            goto error;

        memcpy(&fmt, try_fmt, sizeof(fmt));
        r = v4l2object->ioctl(fd, VIDIOC_S_FMT, &fmt);
    }
    memcpy(try_fmt, &fmt, sizeof(fmt));

    return r;

error:
    memcpy(try_fmt, &fmt, sizeof(fmt));
    GST_WARNING_OBJECT(v4l2object->dbg_obj,
                       "Unable to try format: %s", g_strerror(errno));
    return r;
}

static void
gst_aml_v4l2_object_add_interlace_mode(GstAmlV4l2Object *v4l2object,
                                       GstStructure *s, guint32 width, guint32 height, guint32 pixelformat)
{
    struct v4l2_format fmt;
    GValue interlace_formats = {
        0,
    };
    enum v4l2_field formats[] = {V4L2_FIELD_NONE, V4L2_FIELD_INTERLACED};
    gsize i;
    GstVideoInterlaceMode interlace_mode, prev = -1;

    if (!g_str_equal(gst_structure_get_name(s), "video/x-raw"))
        return;

    if (v4l2object->never_interlaced)
    {
        gst_structure_set(s, "interlace-mode", G_TYPE_STRING, "progressive", NULL);
        return;
    }

    g_value_init(&interlace_formats, GST_TYPE_LIST);

    /* Try twice - once for NONE, once for INTERLACED. */
    for (i = 0; i < G_N_ELEMENTS(formats); i++)
    {
        memset(&fmt, 0, sizeof(fmt));
        fmt.type = v4l2object->type;
        fmt.fmt.pix.width = width;
        fmt.fmt.pix.height = height;
        fmt.fmt.pix.pixelformat = pixelformat;
        fmt.fmt.pix.field = formats[i];

        if (gst_aml_v4l2_object_try_fmt(v4l2object, &fmt) == 0 &&
            gst_aml_v4l2_object_get_interlace_mode(fmt.fmt.pix.field, &interlace_mode) && prev != interlace_mode)
        {
            GValue interlace_enum = {
                0,
            };
            const gchar *mode_string;
            g_value_init(&interlace_enum, G_TYPE_STRING);
            mode_string = gst_video_interlace_mode_to_string(interlace_mode);
            g_value_set_string(&interlace_enum, mode_string);
            gst_value_list_append_and_take_value(&interlace_formats,
                                                 &interlace_enum);
            prev = interlace_mode;
        }
    }

    if (gst_aml_v4l2src_value_simplify(&interlace_formats) || gst_value_list_get_size(&interlace_formats) > 0)
        gst_structure_take_value(s, "interlace-mode", &interlace_formats);
    else
        GST_WARNING_OBJECT(v4l2object, "Failed to determine interlace mode");

    return;
}

static void
gst_aml_v4l2_object_fill_colorimetry_list(GValue *list,
                                          GstVideoColorimetry *cinfo)
{
    GValue colorimetry = G_VALUE_INIT;
    guint size;
    guint i;
    gboolean found = FALSE;

    g_value_init(&colorimetry, G_TYPE_STRING);
    g_value_take_string(&colorimetry, gst_video_colorimetry_to_string(cinfo));
    GST_DEBUG("fill colorimetry:%s into list", gst_video_colorimetry_to_string(cinfo));

    /* only insert if no duplicate */
    size = gst_value_list_get_size(list);
    for (i = 0; i < size; i++)
    {
        const GValue *tmp;

        tmp = gst_value_list_get_value(list, i);
        if (gst_value_compare(&colorimetry, tmp) == GST_VALUE_EQUAL)
        {
            found = TRUE;
            break;
        }
    }

    if (!found)
        gst_value_list_append_and_take_value(list, &colorimetry);
    else
        g_value_unset(&colorimetry);
}

static void
gst_aml_v4l2_object_add_colorspace(GstAmlV4l2Object *v4l2object, GstStructure *s,
                                   guint32 width, guint32 height, guint32 pixelformat)
{
    struct v4l2_format fmt;
    GValue list = G_VALUE_INIT;
    GstVideoColorimetry cinfo;
    enum v4l2_colorspace req_cspace;

    memset(&fmt, 0, sizeof(fmt));
    fmt.type = v4l2object->type;
    fmt.fmt.pix.width = width;
    fmt.fmt.pix.height = height;
    fmt.fmt.pix.pixelformat = pixelformat;

    g_value_init(&list, GST_TYPE_LIST);

    /* step 1: get device default colorspace and insert it first as
     * it should be the preferred one */
    GST_DEBUG("try for pixl format");
    if (gst_aml_v4l2_object_try_fmt(v4l2object, &fmt) == 0)
    {
        if (gst_aml_v4l2_object_get_colorspace(&fmt, &cinfo))
            gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);
    }

    /* step 2: probe all colorspace other than default
     * We don't probe all colorspace, range, matrix and transfer combination to
     * avoid ioctl flooding which could greatly increase initialization time
     * with low-speed devices (UVC...) */
    for (req_cspace = V4L2_COLORSPACE_SMPTE170M;
         req_cspace <= V4L2_COLORSPACE_RAW; req_cspace++)
    {
        GST_DEBUG("try for pixl format in while loop :%d", req_cspace);
        /* V4L2_COLORSPACE_BT878 is deprecated and shall not be used, so skip */
        if (req_cspace == V4L2_COLORSPACE_BT878)
            continue;

        if (V4L2_TYPE_IS_MULTIPLANAR(v4l2object->type))
            fmt.fmt.pix_mp.colorspace = req_cspace;
        else
            fmt.fmt.pix.colorspace = req_cspace;

        if (gst_aml_v4l2_object_try_fmt(v4l2object, &fmt) == 0)
        {
            GST_DEBUG("try for pixl format in while loop :%d tried ok", req_cspace);
            enum v4l2_colorspace colorspace;

            if (V4L2_TYPE_IS_MULTIPLANAR(v4l2object->type))
                colorspace = fmt.fmt.pix_mp.colorspace;
            else
                colorspace = fmt.fmt.pix.colorspace;

            if (colorspace == req_cspace)
            {
                if (gst_aml_v4l2_object_get_colorspace(&fmt, &cinfo))
                    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);
            }
        }
    }

    GST_DEBUG("deal: caps with colorimetry 2,3,14,7");
    cinfo.range = 2;
    cinfo.matrix = 3;
    cinfo.transfer = 14;
    cinfo.primaries = 7;
    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);

    GST_DEBUG("deal: caps with colorimetry 2,6,13,7");
    cinfo.range = 2;
    cinfo.matrix = 6;
    cinfo.transfer = 13;
    cinfo.primaries = 7;
    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);

    GST_DEBUG("deal: caps with colorimetry 2,6,14,7");
    cinfo.range = 2;
    cinfo.matrix = 6;
    cinfo.transfer = 14;
    cinfo.primaries = 7;
    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);

    GST_DEBUG("deal: caps with colorimetry 2,6,0,7");
    cinfo.range = 2;
    cinfo.matrix = 6;
    cinfo.transfer = 0;
    cinfo.primaries = 7;
    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);

    GST_DEBUG("deal: caps with colorimetry 0,6,0,7");
    cinfo.range = 0;
    cinfo.matrix = 6;
    cinfo.transfer = 0;
    cinfo.primaries = 7;
    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);

    GST_DEBUG("deal: caps with colorimetry 2,3,0,0");
    cinfo.range = 2;
    cinfo.matrix = 3;
    cinfo.transfer = 0;
    cinfo.primaries = 0;
    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);

    GST_DEBUG("deal: caps with colorimetry 2,6,14,0");
    cinfo.range = 2;
    cinfo.matrix = 6;
    cinfo.transfer = 14;
    cinfo.primaries = 0;
    gst_aml_v4l2_object_fill_colorimetry_list(&list, &cinfo);

    if (gst_value_list_get_size(&list) > 0)
        gst_structure_take_value(s, "colorimetry", &list);
    else
        g_value_unset(&list);

    return;
}

/* The frame interval enumeration code first appeared in Linux 2.6.19. */
static GstStructure *
gst_aml_v4l2_object_probe_caps_for_format_and_size(GstAmlV4l2Object *v4l2object,
                                                   guint32 pixelformat,
                                                   guint32 width, guint32 height, const GstStructure *template)
{
    gint fd = v4l2object->video_fd;
    struct v4l2_frmivalenum ival;
    guint32 num, denom;
    GstStructure *s;
    GValue rates = {
        0,
    };

    memset(&ival, 0, sizeof(struct v4l2_frmivalenum));
    ival.index = 0;
    ival.pixel_format = pixelformat;
    ival.width = width;
    ival.height = height;

    GST_LOG_OBJECT(v4l2object->dbg_obj,
                   "get frame interval for %ux%u, %" GST_FOURCC_FORMAT, width, height,
                   GST_FOURCC_ARGS(pixelformat));

    /* keep in mind that v4l2 gives us frame intervals (durations); we invert the
     * fraction to get framerate */
    if (v4l2object->ioctl(fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) < 0)
        goto enum_frameintervals_failed;

    if (ival.type == V4L2_FRMIVAL_TYPE_DISCRETE)
    {
        GValue rate = {
            0,
        };

        g_value_init(&rates, GST_TYPE_LIST);
        g_value_init(&rate, GST_TYPE_FRACTION);

        do
        {
            num = ival.discrete.numerator;
            denom = ival.discrete.denominator;

            if (num > G_MAXINT || denom > G_MAXINT)
            {
                /* let us hope we don't get here... */
                num >>= 1;
                denom >>= 1;
            }

            GST_LOG_OBJECT(v4l2object->dbg_obj, "adding discrete framerate: %d/%d",
                           denom, num);

            /* swap to get the framerate */
            gst_value_set_fraction(&rate, denom, num);
            gst_value_list_append_value(&rates, &rate);

            ival.index++;
        } while (v4l2object->ioctl(fd, VIDIOC_ENUM_FRAMEINTERVALS, &ival) >= 0);
    }
    else if (ival.type == V4L2_FRMIVAL_TYPE_STEPWISE)
    {
        GValue min = {
            0,
        };
        GValue step = {
            0,
        };
        GValue max = {
            0,
        };
        gboolean added = FALSE;
        guint32 minnum, mindenom;
        guint32 maxnum, maxdenom;

        g_value_init(&rates, GST_TYPE_LIST);

        g_value_init(&min, GST_TYPE_FRACTION);
        g_value_init(&step, GST_TYPE_FRACTION);
        g_value_init(&max, GST_TYPE_FRACTION);

        /* get the min */
        minnum = ival.stepwise.min.numerator;
        mindenom = ival.stepwise.min.denominator;
        if (minnum > G_MAXINT || mindenom > G_MAXINT)
        {
            minnum >>= 1;
            mindenom >>= 1;
        }
        GST_LOG_OBJECT(v4l2object->dbg_obj, "stepwise min frame interval: %d/%d",
                       minnum, mindenom);
        gst_value_set_fraction(&min, minnum, mindenom);

        /* get the max */
        maxnum = ival.stepwise.max.numerator;
        maxdenom = ival.stepwise.max.denominator;
        if (maxnum > G_MAXINT || maxdenom > G_MAXINT)
        {
            maxnum >>= 1;
            maxdenom >>= 1;
        }

        GST_LOG_OBJECT(v4l2object->dbg_obj, "stepwise max frame interval: %d/%d",
                       maxnum, maxdenom);
        gst_value_set_fraction(&max, maxnum, maxdenom);

        /* get the step */
        num = ival.stepwise.step.numerator;
        denom = ival.stepwise.step.denominator;
        if (num > G_MAXINT || denom > G_MAXINT)
        {
            num >>= 1;
            denom >>= 1;
        }

        if (num == 0 || denom == 0)
        {
            /* in this case we have a wrong fraction or no step, set the step to max
             * so that we only add the min value in the loop below */
            num = maxnum;
            denom = maxdenom;
        }

        /* since we only have gst_value_fraction_subtract and not add, negate the
         * numerator */
        GST_LOG_OBJECT(v4l2object->dbg_obj, "stepwise step frame interval: %d/%d",
                       num, denom);
        gst_value_set_fraction(&step, -num, denom);

        while (gst_value_compare(&min, &max) != GST_VALUE_GREATER_THAN)
        {
            GValue rate = {
                0,
            };

            num = gst_value_get_fraction_numerator(&min);
            denom = gst_value_get_fraction_denominator(&min);
            GST_LOG_OBJECT(v4l2object->dbg_obj, "adding stepwise framerate: %d/%d",
                           denom, num);

            /* invert to get the framerate */
            g_value_init(&rate, GST_TYPE_FRACTION);
            gst_value_set_fraction(&rate, denom, num);
            gst_value_list_append_value(&rates, &rate);
            added = TRUE;

            /* we're actually adding because step was negated above. This is because
             * there is no _add function... */
            if (!gst_value_fraction_subtract(&min, &min, &step))
            {
                GST_WARNING_OBJECT(v4l2object->dbg_obj, "could not step fraction!");
                break;
            }
        }
        if (!added)
        {
            /* no range was added, leave the default range from the template */
            GST_WARNING_OBJECT(v4l2object->dbg_obj,
                               "no range added, leaving default");
            g_value_unset(&rates);
        }
    }
    else if (ival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS)
    {
        guint32 maxnum, maxdenom;

        g_value_init(&rates, GST_TYPE_FRACTION_RANGE);

        num = ival.stepwise.min.numerator;
        denom = ival.stepwise.min.denominator;
        if (num > G_MAXINT || denom > G_MAXINT)
        {
            num >>= 1;
            denom >>= 1;
        }

        maxnum = ival.stepwise.max.numerator;
        maxdenom = ival.stepwise.max.denominator;
        if (maxnum > G_MAXINT || maxdenom > G_MAXINT)
        {
            maxnum >>= 1;
            maxdenom >>= 1;
        }

        GST_LOG_OBJECT(v4l2object->dbg_obj,
                       "continuous frame interval %d/%d to %d/%d", maxdenom, maxnum, denom,
                       num);

        gst_value_set_fraction_range_full(&rates, maxdenom, maxnum, denom, num);
    }
    else
    {
        goto unknown_type;
    }

return_data:
    s = gst_structure_copy(template);
    gst_structure_set(s, "width", G_TYPE_INT, (gint)width,
                      "height", G_TYPE_INT, (gint)height, NULL);

    gst_aml_v4l2_object_add_aspect_ratio(v4l2object, s);

    if (!v4l2object->skip_try_fmt_probes)
    {
        gst_aml_v4l2_object_add_interlace_mode(v4l2object, s, width, height,
                                               pixelformat);
        // gst_aml_v4l2_object_add_colorspace(v4l2object, s, width, height, pixelformat);
    }

    if (G_IS_VALUE(&rates))
    {
        gst_aml_v4l2src_value_simplify(&rates);
        /* only change the framerate on the template when we have a valid probed new
         * value */
        gst_structure_take_value(s, "framerate", &rates);
    }
    else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
             v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
    {
        gst_structure_set(s, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT,
                          1, NULL);
    }
    return s;

    /* ERRORS */
enum_frameintervals_failed:
{
    GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                     "Unable to enumerate intervals for %" GST_FOURCC_FORMAT "@%ux%u",
                     GST_FOURCC_ARGS(pixelformat), width, height);
    goto return_data;
}
unknown_type:
{
    /* I don't see how this is actually an error, we ignore the format then */
    GST_WARNING_OBJECT(v4l2object->dbg_obj,
                       "Unknown frame interval type at %" GST_FOURCC_FORMAT "@%ux%u: %u",
                       GST_FOURCC_ARGS(pixelformat), width, height, ival.type);
    return NULL;
}
}

static gint
sort_by_frame_size(GstStructure *s1, GstStructure *s2)
{
    int w1, h1, w2, h2;

    gst_structure_get_int(s1, "width", &w1);
    gst_structure_get_int(s1, "height", &h1);
    gst_structure_get_int(s2, "width", &w2);
    gst_structure_get_int(s2, "height", &h2);

    /* I think it's safe to assume that this won't overflow for a while */
    return ((w2 * h2) - (w1 * h1));
}

static void
gst_aml_v4l2_object_update_and_append(GstAmlV4l2Object *v4l2object,
                                      guint32 format, GstCaps *caps, GstStructure *s)
{
    GstStructure *alt_s = NULL;

    /* Encoded stream on output buffer need to be parsed */
    if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
        v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
    {
        gint i = 0;

        for (; i < GST_AML_V4L2_FORMAT_COUNT; i++)
        {
            if (format == gst_aml_v4l2_formats[i].format &&
                gst_aml_v4l2_formats[i].flags & GST_V4L2_CODEC &&
                !(gst_aml_v4l2_formats[i].flags & GST_V4L2_NO_PARSE))
            {
                gst_structure_set(s, "parsed", G_TYPE_BOOLEAN, TRUE, NULL);
                break;
            }
        }
    }

    if (v4l2object->has_alpha_component &&
        (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
         v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
    {
        switch (format)
        {
        case V4L2_PIX_FMT_RGB32:
            alt_s = gst_structure_copy(s);
            gst_structure_set(alt_s, "format", G_TYPE_STRING, "ARGB", NULL);
            break;
        case V4L2_PIX_FMT_BGR32:
            alt_s = gst_structure_copy(s);
            gst_structure_set(alt_s, "format", G_TYPE_STRING, "BGRA", NULL);
            break;
        default:
            break;
        }
    }

    gst_caps_append_structure(caps, s);

    if (alt_s)
        gst_caps_append_structure(caps, alt_s);
}

static GstCaps *
gst_aml_v4l2_object_probe_caps_for_format(GstAmlV4l2Object *v4l2object,
                                          guint32 pixelformat, const GstStructure *template)
{
    GstCaps *ret = gst_caps_new_empty();
    GstStructure *tmp;
    gint fd = v4l2object->video_fd;
    struct v4l2_frmsizeenum size;
    GList *results = NULL;
    guint32 w, h;

    if (pixelformat == GST_MAKE_FOURCC('M', 'P', 'E', 'G'))
    {
        gst_caps_append_structure(ret, gst_structure_copy(template));
        return ret;
    }

    memset(&size, 0, sizeof(struct v4l2_frmsizeenum));
    size.index = 0;
    size.pixel_format = pixelformat;

    GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                     "Enumerating frame sizes for %" GST_FOURCC_FORMAT,
                     GST_FOURCC_ARGS(pixelformat));

    if (v4l2object->ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
        goto enum_framesizes_failed;

    if (size.type == V4L2_FRMSIZE_TYPE_DISCRETE)
    {
        do
        {
            GST_LOG_OBJECT(v4l2object->dbg_obj, "got discrete frame size %dx%d",
                           size.discrete.width, size.discrete.height);

            w = MIN(size.discrete.width, G_MAXINT);
            h = MIN(size.discrete.height, G_MAXINT);

            if (w && h)
            {
                tmp =
                    gst_aml_v4l2_object_probe_caps_for_format_and_size(v4l2object,
                                                                       pixelformat, w, h, template);

                if (tmp)
                    results = g_list_prepend(results, tmp);
            }

            size.index++;
        } while (v4l2object->ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &size) >= 0);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                         "done iterating discrete frame sizes");
    }
    else if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE)
    {
        guint32 maxw, maxh, step_w, step_h;

        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "we have stepwise frame sizes:");
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "min width:   %d",
                         size.stepwise.min_width);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "min height:  %d",
                         size.stepwise.min_height);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "max width:   %d",
                         size.stepwise.max_width);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "min height:  %d",
                         size.stepwise.max_height);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "step width:  %d",
                         size.stepwise.step_width);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "step height: %d",
                         size.stepwise.step_height);

        w = MAX(size.stepwise.min_width, 1);
        h = MAX(size.stepwise.min_height, 1);
        maxw = MIN(size.stepwise.max_width, G_MAXINT);
        maxh = MIN(size.stepwise.max_height, G_MAXINT);

        /* in this position,updating resolution only to pass the negotiation
         * actually, the details about resolution refer to function:
         * gst_aml_v4l2_object_set_format_full for checking.
         */
        GST_DEBUG_OBJECT (v4l2object->dbg_obj, "update maxw_maxh to MAX(maxw,maxh)_MAX(maxw,maxh)");
        maxh = MAX (maxw, maxh);
        maxw = maxh;

        step_w = MAX(size.stepwise.step_width, 1);
        step_h = MAX(size.stepwise.step_height, 1);

        /* FIXME: check for sanity and that min/max are multiples of the steps */

        /* we only query details for the max width/height since it's likely the
         * most restricted if there are any resolution-dependent restrictions */
        tmp = gst_aml_v4l2_object_probe_caps_for_format_and_size(v4l2object,
                                                                 pixelformat, maxw, maxh, template);

        if (tmp)
        {
            GValue step_range = G_VALUE_INIT;

            g_value_init(&step_range, GST_TYPE_INT_RANGE);
            gst_value_set_int_range_step(&step_range, w, maxw, step_w);
            gst_structure_set_value(tmp, "width", &step_range);

            gst_value_set_int_range_step(&step_range, h, maxh, step_h);
            gst_structure_take_value(tmp, "height", &step_range);

            /* no point using the results list here, since there's only one struct */
            gst_aml_v4l2_object_update_and_append(v4l2object, pixelformat, ret, tmp);
        }
    }
    else if (size.type == V4L2_FRMSIZE_TYPE_CONTINUOUS)
    {
        guint32 maxw, maxh;

        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "we have continuous frame sizes:");
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "min width:   %d",
                         size.stepwise.min_width);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "min height:  %d",
                         size.stepwise.min_height);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "max width:   %d",
                         size.stepwise.max_width);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "min height:  %d",
                         size.stepwise.max_height);

        w = MAX(size.stepwise.min_width, 1);
        h = MAX(size.stepwise.min_height, 1);
        maxw = MIN(size.stepwise.max_width, G_MAXINT);
        maxh = MIN(size.stepwise.max_height, G_MAXINT);

        tmp =
            gst_aml_v4l2_object_probe_caps_for_format_and_size(v4l2object, pixelformat,
                                                               w, h, template);
        if (tmp)
        {
            gst_structure_set(tmp, "width", GST_TYPE_INT_RANGE, (gint)w,
                              (gint)maxw, "height", GST_TYPE_INT_RANGE, (gint)h, (gint)maxh,
                              NULL);

            /* no point using the results list here, since there's only one struct */
            gst_aml_v4l2_object_update_and_append(v4l2object, pixelformat, ret, tmp);
        }
    }
    else
    {
        goto unknown_type;
    }

    /* we use an intermediary list to store and then sort the results of the
     * probing because we can't make any assumptions about the order in which
     * the driver will give us the sizes, but we want the final caps to contain
     * the results starting with the highest resolution and having the lowest
     * resolution last, since order in caps matters for things like fixation. */
    results = g_list_sort(results, (GCompareFunc)sort_by_frame_size);
    while (results != NULL)
    {
        gst_aml_v4l2_object_update_and_append(v4l2object, pixelformat, ret,
                                              results->data);
        results = g_list_delete_link(results, results);
    }

    if (gst_caps_is_empty(ret))
        goto enum_framesizes_no_results;

    return ret;

    /* ERRORS */
enum_framesizes_failed:
{
    /* I don't see how this is actually an error */
    GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                     "Failed to enumerate frame sizes for pixelformat %" GST_FOURCC_FORMAT
                     " (%s)",
                     GST_FOURCC_ARGS(pixelformat), g_strerror(errno));
    goto default_frame_sizes;
}
enum_framesizes_no_results:
{
    /* it's possible that VIDIOC_ENUM_FRAMESIZES is defined but the driver in
     * question doesn't actually support it yet */
    GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                     "No results for pixelformat %" GST_FOURCC_FORMAT
                     " enumerating frame sizes, trying fallback",
                     GST_FOURCC_ARGS(pixelformat));
    goto default_frame_sizes;
}
unknown_type:
{
    GST_WARNING_OBJECT(v4l2object->dbg_obj,
                       "Unknown frame sizeenum type for pixelformat %" GST_FOURCC_FORMAT
                       ": %u",
                       GST_FOURCC_ARGS(pixelformat), size.type);
    goto default_frame_sizes;
}

default_frame_sizes:
{
    gint min_w, max_w, min_h, max_h;

#ifdef DELETE_FOR_LGE
    gint fix_num = 0, fix_denom = 0;
#endif

    /* This code is for Linux < 2.6.19 */
    min_w = min_h = 1;
    max_w = max_h = GST_AML_V4L2_MAX_SIZE;
    if (!gst_aml_v4l2_object_get_nearest_size(v4l2object, pixelformat, &min_w,
                                              &min_h))
    {
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Could not probe minimum capture size for pixelformat %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS(pixelformat));
    }
    if (!gst_aml_v4l2_object_get_nearest_size(v4l2object, pixelformat, &max_w,
                                              &max_h))
    {
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Could not probe maximum capture size for pixelformat %" GST_FOURCC_FORMAT, GST_FOURCC_ARGS(pixelformat));
    }

    tmp = gst_structure_copy(template);
#ifdef DELETE_FOR_LGE
    if (fix_num)
    {
        gst_structure_set(tmp, "framerate", GST_TYPE_FRACTION, fix_num,
                          fix_denom, NULL);
    }
    else
#endif
    if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
        v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
    {
        /* if norm can't be used, copy the template framerate */
        gst_structure_set(tmp, "framerate", GST_TYPE_FRACTION_RANGE, 0, 1,
                          G_MAXINT, 1, NULL);
    }

    if (min_w == max_w)
        gst_structure_set(tmp, "width", G_TYPE_INT, max_w, NULL);
    else
        gst_structure_set(tmp, "width", GST_TYPE_INT_RANGE, min_w, max_w, NULL);

    if (min_h == max_h)
        gst_structure_set(tmp, "height", G_TYPE_INT, max_h, NULL);
    else
        gst_structure_set(tmp, "height", GST_TYPE_INT_RANGE, min_h, max_h, NULL);

    gst_aml_v4l2_object_add_aspect_ratio(v4l2object, tmp);

    if (!v4l2object->skip_try_fmt_probes)
    {
        /* We could consider setting interlace mode from min and max. */
        gst_aml_v4l2_object_add_interlace_mode(v4l2object, tmp, max_w, max_h,
                                               pixelformat);
        /* We could consider to check colorspace for min too, in case it depends on
         * the size. But in this case, min and max could not be enough */
        gst_aml_v4l2_object_add_colorspace(v4l2object, tmp, max_w, max_h,
                                           pixelformat);
    }

    gst_aml_v4l2_object_update_and_append(v4l2object, pixelformat, ret, tmp);
    return ret;
}
}

static gboolean
gst_aml_v4l2_object_get_nearest_size(GstAmlV4l2Object *v4l2object,
                                     guint32 pixelformat, gint *width, gint *height)
{
    struct v4l2_format fmt;
    gboolean ret = FALSE;
    GstVideoInterlaceMode interlace_mode;

    g_return_val_if_fail(width != NULL, FALSE);
    g_return_val_if_fail(height != NULL, FALSE);

    GST_LOG_OBJECT(v4l2object->dbg_obj,
                   "getting nearest size to %dx%d with format %" GST_FOURCC_FORMAT,
                   *width, *height, GST_FOURCC_ARGS(pixelformat));

    memset(&fmt, 0, sizeof(struct v4l2_format));

    /* get size delimiters */
    memset(&fmt, 0, sizeof(fmt));
    fmt.type = v4l2object->type;
    fmt.fmt.pix.width = *width;
    fmt.fmt.pix.height = *height;
    fmt.fmt.pix.pixelformat = pixelformat;
    fmt.fmt.pix.field = V4L2_FIELD_ANY;

    if (gst_aml_v4l2_object_try_fmt(v4l2object, &fmt) < 0)
        goto error;

    GST_LOG_OBJECT(v4l2object->dbg_obj,
                   "got nearest size %dx%d", fmt.fmt.pix.width, fmt.fmt.pix.height);

    *width = fmt.fmt.pix.width;
    *height = fmt.fmt.pix.height;

    if (!gst_aml_v4l2_object_get_interlace_mode(fmt.fmt.pix.field, &interlace_mode))
    {
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Unsupported field type for %" GST_FOURCC_FORMAT "@%ux%u: %u",
                           GST_FOURCC_ARGS(pixelformat), *width, *height, fmt.fmt.pix.field);
        goto error;
    }

    ret = TRUE;

error:
    if (!ret)
    {
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Unable to try format: %s", g_strerror(errno));
    }

    return ret;
}

static gboolean
gst_aml_v4l2_object_is_dmabuf_supported(GstAmlV4l2Object *v4l2object)
{
    gboolean ret = TRUE;
    struct v4l2_exportbuffer expbuf = {
        .type = v4l2object->type,
        .index = -1,
        .plane = -1,
        .flags = O_CLOEXEC | O_RDWR,
    };

    if (v4l2object->fmtdesc->flags & V4L2_FMT_FLAG_EMULATED)
    {
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "libv4l2 converter detected, disabling DMABuf");
        ret = FALSE;
    }

    /* Expected to fail, but ENOTTY tells us that it is not implemented. */
    v4l2object->ioctl(v4l2object->video_fd, VIDIOC_EXPBUF, &expbuf);
    if (errno == ENOTTY)
        ret = FALSE;

    return ret;
}

static gboolean
gst_aml_v4l2_object_setup_pool(GstAmlV4l2Object *v4l2object, GstCaps *caps)
{
    GstAmlV4l2IOMode mode;

    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "initializing the %s system",
                     V4L2_TYPE_IS_OUTPUT(v4l2object->type) ? "output" : "capture");

    GST_AML_V4L2_CHECK_OPEN(v4l2object);
    GST_AML_V4L2_CHECK_NOT_ACTIVE(v4l2object);

    /* find transport */
    mode = v4l2object->req_mode;

    if (v4l2object->device_caps & V4L2_CAP_READWRITE)
    {
        if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
            mode = GST_V4L2_IO_RW;
    }
    else if (v4l2object->req_mode == GST_V4L2_IO_RW)
        goto method_not_supported;

    if (v4l2object->device_caps & V4L2_CAP_STREAMING)
    {
        if (v4l2object->req_mode == GST_V4L2_IO_AUTO)
        {
            if (!V4L2_TYPE_IS_OUTPUT(v4l2object->type) &&
                gst_aml_v4l2_object_is_dmabuf_supported(v4l2object))
            {
                mode = GST_V4L2_IO_DMABUF;
            }
            else
            {
                mode = GST_V4L2_IO_MMAP;
            }
        }
    }
    else if (v4l2object->req_mode == GST_V4L2_IO_MMAP ||
             v4l2object->req_mode == GST_V4L2_IO_DMABUF)
        goto method_not_supported;

    /* if still no transport selected, error out */
    if (mode == GST_V4L2_IO_AUTO)
        goto no_supported_capture_method;

    GST_INFO_OBJECT(v4l2object->dbg_obj, "accessing buffers via mode %d", mode);
    v4l2object->mode = mode;

    /* If min_buffers is not set, the driver either does not support the control or
       it has not been asked yet via propose_allocation/decide_allocation. */
    if (!v4l2object->min_buffers)
        gst_aml_v4l2_get_driver_min_buffers(v4l2object);

    /* Map the buffers */
    GST_LOG_OBJECT(v4l2object->dbg_obj, "initiating buffer pool");

    if (!(v4l2object->pool = gst_aml_v4l2_buffer_pool_new(v4l2object, caps)))
        goto buffer_pool_new_failed;

    GST_AML_V4L2_SET_ACTIVE(v4l2object);

    return TRUE;

    /* ERRORS */
buffer_pool_new_failed:
{
    GST_ELEMENT_ERROR(v4l2object->element, RESOURCE, READ,
                      (_("Could not map buffers from device '%s'"),
                       v4l2object->videodev),
                      ("Failed to create buffer pool: %s", g_strerror(errno)));
    return FALSE;
}
method_not_supported:
{
    GST_ELEMENT_ERROR(v4l2object->element, RESOURCE, READ,
                      (_("The driver of device '%s' does not support the IO method %d"),
                       v4l2object->videodev, mode),
                      (NULL));
    return FALSE;
}
no_supported_capture_method:
{
    GST_ELEMENT_ERROR(v4l2object->element, RESOURCE, READ,
                      (_("The driver of device '%s' does not support any known IO "
                         "method."),
                       v4l2object->videodev),
                      (NULL));
    return FALSE;
}
}

static void
gst_aml_v4l2_object_set_stride(GstVideoInfo *info, GstVideoAlignment *align,
                               gint plane, gint stride)
{
    const GstVideoFormatInfo *finfo = info->finfo;

    if (GST_VIDEO_FORMAT_INFO_IS_TILED(finfo))
    {
        gint x_tiles, y_tiles, ws, hs, tile_height, padded_height;

        ws = GST_VIDEO_FORMAT_INFO_TILE_WS(finfo);
        hs = GST_VIDEO_FORMAT_INFO_TILE_HS(finfo);
        tile_height = 1 << hs;

        padded_height = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT(finfo, plane,
                                                           info->height + align->padding_top + align->padding_bottom);
        padded_height = GST_ROUND_UP_N(padded_height, tile_height);

        x_tiles = stride >> ws;
        y_tiles = padded_height >> hs;
        info->stride[plane] = GST_VIDEO_TILE_MAKE_STRIDE(x_tiles, y_tiles);
    }
    else
    {
        info->stride[plane] = stride;
    }
}

static void
gst_aml_v4l2_object_extrapolate_info(GstAmlV4l2Object *v4l2object,
                                     GstVideoInfo *info, GstVideoAlignment *align, gint stride)
{
    const GstVideoFormatInfo *finfo = info->finfo;
    gint i, estride, padded_height;
    gsize offs = 0;

    g_return_if_fail(v4l2object->n_v4l2_planes == 1);

    padded_height = info->height + align->padding_top + align->padding_bottom;

    for (i = 0; i < finfo->n_planes; i++)
    {
        estride = gst_aml_v4l2_object_extrapolate_stride(finfo, i, stride);

        gst_aml_v4l2_object_set_stride(info, align, i, estride);

        info->offset[i] = offs;
        offs += estride *
                GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT(finfo, i, padded_height);

        GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                         "Extrapolated for plane %d with base stride %d: "
                         "stride %d, offset %" G_GSIZE_FORMAT,
                         i, stride, info->stride[i],
                         info->offset[i]);
    }

    /* Update the image size according the amount of data we are going to
     * read/write. This workaround bugs in driver where the sizeimage provided
     * by TRY/S_FMT represent the buffer length (maximum size) rather then the expected
     * bytesused (buffer size). */
    if (offs < info->size)
        info->size = offs;
}

static void
gst_aml_v4l2_object_save_format(GstAmlV4l2Object *v4l2object,
                                struct v4l2_fmtdesc *fmtdesc, struct v4l2_format *format,
                                GstVideoInfo *info, GstVideoAlignment *align)
{
    const GstVideoFormatInfo *finfo = info->finfo;
    gboolean standard_stride = TRUE;
    gint stride, pstride, padded_width, padded_height, i;

    if (GST_VIDEO_INFO_FORMAT(info) == GST_VIDEO_FORMAT_ENCODED)
    {
        v4l2object->n_v4l2_planes = 1;
        info->size = format->fmt.pix.sizeimage;
        goto store_info;
    }

    /* adjust right padding */
    if (V4L2_TYPE_IS_MULTIPLANAR(v4l2object->type))
        stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
    else
        stride = format->fmt.pix.bytesperline;

    pstride = GST_VIDEO_FORMAT_INFO_PSTRIDE(finfo, 0);
    if (pstride)
    {
        padded_width = stride / pstride;
    }
    else
    {
        /* pstride can be 0 for complex formats */
        GST_WARNING_OBJECT(v4l2object->element,
                           "format %s has a pstride of 0, cannot compute padded with",
                           gst_video_format_to_string(GST_VIDEO_INFO_FORMAT(info)));
        padded_width = stride;
    }

    if (padded_width < format->fmt.pix.width)
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Driver bug detected, stride (%d) is too small for the width (%d)",
                           padded_width, format->fmt.pix.width);

    align->padding_right = padded_width - info->width - align->padding_left;

    /* adjust bottom padding */
    padded_height = format->fmt.pix.height;

    if (GST_VIDEO_FORMAT_INFO_IS_TILED(finfo))
    {
        guint hs, tile_height;

        hs = GST_VIDEO_FORMAT_INFO_TILE_HS(finfo);
        tile_height = 1 << hs;

        padded_height = GST_ROUND_UP_N(padded_height, tile_height);
    }

    align->padding_bottom = padded_height - info->height - align->padding_top;

    /* setup the strides and offset */
    if (V4L2_TYPE_IS_MULTIPLANAR(v4l2object->type))
    {
        struct v4l2_pix_format_mplane *pix_mp = &format->fmt.pix_mp;

        /* figure out the frame layout */
        v4l2object->n_v4l2_planes = MAX(1, pix_mp->num_planes);
        info->size = 0;
        for (i = 0; i < v4l2object->n_v4l2_planes; i++)
        {
            stride = pix_mp->plane_fmt[i].bytesperline;

            if (info->stride[i] != stride)
                standard_stride = FALSE;

            gst_aml_v4l2_object_set_stride(info, align, i, stride);
            info->offset[i] = info->size;
            info->size += pix_mp->plane_fmt[i].sizeimage;
        }

        /* Extrapolate stride if planar format are being set in 1 v4l2 plane */
        if (v4l2object->n_v4l2_planes < finfo->n_planes)
        {
            stride = format->fmt.pix_mp.plane_fmt[0].bytesperline;
            gst_aml_v4l2_object_extrapolate_info(v4l2object, info, align, stride);
        }
    }
    else
    {
        /* only one plane in non-MPLANE mode */
        v4l2object->n_v4l2_planes = 1;
        info->size = format->fmt.pix.sizeimage;
        stride = format->fmt.pix.bytesperline;

        if (info->stride[0] != stride)
            standard_stride = FALSE;

        gst_aml_v4l2_object_extrapolate_info(v4l2object, info, align, stride);
    }

    /* adjust the offset to take into account left and top */
    if (GST_VIDEO_FORMAT_INFO_IS_TILED(finfo))
    {
        if ((align->padding_left + align->padding_top) > 0)
            GST_WARNING_OBJECT(v4l2object->dbg_obj,
                               "Left and top padding is not permitted for tiled formats");
    }
    else
    {
        for (i = 0; i < finfo->n_planes; i++)
        {
            gint vedge, hedge;

            /* FIXME we assume plane as component as this is true for all supported
             * format we support. */

            hedge = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH(finfo, i, align->padding_left);
            vedge = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT(finfo, i, align->padding_top);

            info->offset[i] += (vedge * info->stride[i]) +
                               (hedge * GST_VIDEO_INFO_COMP_PSTRIDE(info, i));
        }
    }

store_info:
    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Got sizeimage %" G_GSIZE_FORMAT,
                     info->size);

    /* to avoid copies we need video meta if there is padding */
    v4l2object->need_video_meta =
        ((align->padding_top + align->padding_left + align->padding_right +
          align->padding_bottom) != 0);

    /* ... or if stride is non "standard" */
    if (!standard_stride)
        v4l2object->need_video_meta = TRUE;

    /* ... or also video meta if we use multiple, non-contiguous, planes */
    if (v4l2object->n_v4l2_planes > 1)
        v4l2object->need_video_meta = TRUE;

    v4l2object->info = *info;
    v4l2object->align = *align;
    v4l2object->format = *format;
    v4l2object->fmtdesc = fmtdesc;

    /* if we have a framerate pre-calculate duration */
    if (info->fps_n > 0 && info->fps_d > 0)
    {
        v4l2object->duration = gst_util_uint64_scale_int(GST_SECOND, info->fps_d,
                                                         info->fps_n);
    }
    else
    {
        v4l2object->duration = GST_CLOCK_TIME_NONE;
    }
}

gint gst_aml_v4l2_object_extrapolate_stride(const GstVideoFormatInfo *finfo,
                                            gint plane, gint stride)
{
    gint estride;

    switch (finfo->format)
    {
    case GST_VIDEO_FORMAT_NV12:
    case GST_VIDEO_FORMAT_NV12_64Z32:
    case GST_VIDEO_FORMAT_NV21:
    case GST_VIDEO_FORMAT_NV16:
    case GST_VIDEO_FORMAT_NV61:
    case GST_VIDEO_FORMAT_NV24:
        estride = (plane == 0 ? 1 : 2) *
                  GST_VIDEO_FORMAT_INFO_SCALE_WIDTH(finfo, plane, stride);
        break;
    default:
        estride = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH(finfo, plane, stride);
        break;
    }

    return estride;
}

static gboolean
gst_aml_v4l2_video_colorimetry_matches(const GstVideoColorimetry *cinfo,
                                       const gchar *color)
{
    GstVideoColorimetry ci;
    static const GstVideoColorimetry ci_likely_jpeg = {
        GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
        GST_VIDEO_TRANSFER_UNKNOWN, GST_VIDEO_COLOR_PRIMARIES_UNKNOWN};
    static const GstVideoColorimetry ci_jpeg = {
        GST_VIDEO_COLOR_RANGE_0_255, GST_VIDEO_COLOR_MATRIX_BT601,
        GST_VIDEO_TRANSFER_SRGB, GST_VIDEO_COLOR_PRIMARIES_BT709};

    if (!gst_video_colorimetry_from_string(&ci, color))
        return FALSE;

    if (gst_video_colorimetry_is_equal(&ci, cinfo))
        return TRUE;

    /* Allow 1:4:0:0 (produced by jpegdec) if the device expects 1:4:7:1 */
    if (gst_video_colorimetry_is_equal(&ci, &ci_likely_jpeg) && gst_video_colorimetry_is_equal(cinfo, &ci_jpeg))
        return TRUE;

    return FALSE;
}

static gboolean needSpecConfigForFg(GstAmlV4l2Object *v4l2object)
{
    gboolean result= FALSE;
    int fd = -1;
    char valstr[64];
    const char* path= "/sys/class/video/film_grain_support";
    uint32_t val= 0;
    struct v4l2_control ctl;

    GST_LOG("configForFilmGrain: enter");
    fd = open(path, O_RDONLY|O_CLOEXEC);
    if ( fd < 0 )
    {
       GST_DEBUG("unable to open file (%s)", path);
       goto exit;
    }

    memset(valstr, 0, sizeof(valstr));
    if (read(fd, valstr, sizeof(valstr) - 1) == -1 )
    {
       GST_DEBUG("unable to read fg flag");
       goto exit;
    }

    valstr[strlen(valstr)] = '\0';

    if ( sscanf(valstr, "%u", &val) < 1)
    {
       GST_DEBUG("unable to get flag from: (%s)", valstr);
       goto exit;
    }

    GST_LOG("got film_grain_support:%d from node", val);
    if (val != 0)
    {
        goto exit;
    }

    memset( &ctl, 0, sizeof(ctl));
    ctl.id= AML_V4L2_GET_FILMGRAIN_INFO;
    v4l2object->ioctl(v4l2object->video_fd, VIDIOC_G_CTRL, ctl);
    GST_LOG("got VIDIOC_G_CTRL value: %d", ctl.value);
    if (ctl.value == 0)
    {
        goto exit;
    }

    result= TRUE;

exit:
    if ( fd >= 0 )
    {
       close(fd);
    }
    GST_LOG("configForFilmGrain: exit: result %d", result);
    return result;
}

static gboolean
get_amlogic_vdec_parm(GstAmlV4l2Object *v4l2object, struct v4l2_streamparm *streamparm)
{
    struct v4l2_ext_control control;
    struct v4l2_ext_controls ctrls;
    gboolean use_ext_config = FALSE;
    int major = 0,minor = 0;
    struct utsname info;
    struct aml_dec_params *pdecParm = (struct aml_dec_params *)streamparm->parm.raw_data;

    if (uname(&info) || sscanf(info.release, "%d.%d", &major, &minor) <= 0)
    {
        GST_DEBUG("get linux version failed");
        return FALSE;
    }
    GST_DEBUG("linux  major version %d %d", major,minor);
    use_ext_config = ((major == 5 && minor >= 15) || major >= 6) ? TRUE: FALSE;

    if (use_ext_config)
    {
        memset(&ctrls, 0, sizeof(ctrls));
        memset(&control, 0, sizeof(control));
        control.id = AML_V4L2_DEC_PARMS_CONFIG;
        control.ptr = pdecParm;
        control.size = sizeof(struct aml_dec_params);
        ctrls.count = 1;
        ctrls.controls = &control;
        if (v4l2object->ioctl( v4l2object->video_fd, VIDIOC_G_EXT_CTRLS, &ctrls ) <0)
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "get vdec parm fail");
            return FALSE;
        }
        GST_DEBUG("dw: %d, flag: %d, status: %d, margin: %d",pdecParm->cfg.double_write_mode,
                pdecParm->cfg.metadata_config_flag, pdecParm->parms_status, pdecParm->cfg.ref_buf_margin);
    }
    else
    {
        if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_G_PARM, streamparm) < 0)
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "get vdec parm fail");
            return FALSE;
        }
    }
    return TRUE;
}

static int gst_aml_config_dw(GstAmlV4l2Object *v4l2object, guint32 pixFormat, guint width, guint height, gboolean interlace)
{
    const char *env_dw;
    int double_write = VDEC_DW_NO_AFBC;

    GST_DEBUG("pixFormat: %d", pixFormat);
    switch (pixFormat)
    {
        case V4L2_PIX_FMT_MPEG:
        case V4L2_PIX_FMT_MPEG1:
        case V4L2_PIX_FMT_MPEG2:
        case V4L2_PIX_FMT_MPEG4:
            double_write = VDEC_DW_NO_AFBC;
            break;
        case V4L2_PIX_FMT_H264:
        {
            if (width > 1920 && height > 1080 && interlace)
                double_write = VDEC_DW_AFBC_1_4_DW;
            else
                double_write = VDEC_DW_NO_AFBC;
            break;
        }
        case V4L2_PIX_FMT_HEVC:
            double_write = VDEC_DW_AFBC_AUTO_1_4;
            if (interlace)
                double_write = VDEC_DW_AFBC_1_1_DW;
            if (v4l2object->low_memory_mode)
                double_write = VDEC_DW_AFBC_ONLY;
            break;
        case V4L2_PIX_FMT_VP9:
        case V4L2_PIX_FMT_AV1:
            double_write = v4l2object->low_memory_mode ? VDEC_DW_AFBC_ONLY:VDEC_DW_AFBC_AUTO_1_4;
            break;
        default:
            GST_WARNING("unknown video format %d", pixFormat);
            break;
    }

    env_dw = getenv("V4L2_SET_AMLOGIC_DW_MODE");
    if (env_dw)
        double_write = atoi(env_dw);

    return double_write;
}

static void
set_amlogic_vdec_parm(GstAmlV4l2Object *v4l2object, struct v4l2_streamparm *streamparm, GstCaps *caps, guint32 pixFormat)
{
    struct aml_dec_params *decParm = (struct aml_dec_params *)streamparm->parm.raw_data;
    const char *env;
    struct v4l2_ext_control control;
    struct v4l2_ext_controls ctrls;
    gboolean use_ext_config = FALSE;
    int major = 0, minor = 0;
    struct utsname info;
    gboolean is_interlaced = FALSE;
    guint width = 0, height = 0;

    streamparm->type = v4l2object->type;

    if (getenv("V4L2DEC_LOW_MEM_MODE"))
        v4l2object->low_memory_mode = TRUE;
    GST_DEBUG("low mem: %d",v4l2object->low_memory_mode);

    if (uname(&info) || sscanf(info.release, "%d.%d", &major, &minor) <= 0)
    {
        GST_DEBUG("get linux version failed");
    }
    GST_DEBUG("linux  major version %d %d", major,minor);
    use_ext_config = ((major == 5 && minor >= 15) || major >= 6) ? TRUE: FALSE;

    GstStructure *structure = gst_caps_get_structure(caps, 0);
    if (structure == NULL)
    {
        return;
    }
    gst_structure_get_uint(structure,"width",&width);
    gst_structure_get_uint(structure,"height",&height);
    if (gst_structure_has_field(structure, "interlace-mode"))
    {
        const gchar *mode = gst_structure_get_string(structure,"interlace-mode");
        is_interlaced = !strcmp(mode, "progressive") ? FALSE:TRUE;
        GST_DEBUG("is_interlaced: %d",is_interlaced);
    }

    if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
    {
        /*set bit12 value to 1,
        *v4l2 output 0 pts of second interlace field frame */
        decParm->cfg.metadata_config_flag |= (1 << 12);
        decParm->parms_status = V4L2_CONFIG_PARM_DECODE_CFGINFO;

        decParm->cfg.metadata_config_flag |= 1 << 13;

        /*set bit18 value to 1
         *release vpp in advance */
        decParm->cfg.metadata_config_flag |= (1 << 18);
        decParm->cfg.low_latency_mode = v4l2object->low_latency_mode;

        if (v4l2object->enable_nr)
        {
           GST_DEBUG("enable nr in di");
           decParm->cfg.metadata_config_flag |= (1 << 14);
           decParm->cfg.metadata_config_flag |= (1 << 15);
        }

        decParm->cfg.double_write_mode = gst_aml_config_dw(v4l2object, pixFormat, width, height, is_interlaced);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "output cfg dw mode to %d", decParm->cfg.double_write_mode);
        v4l2object->dw_mode = decParm->cfg.double_write_mode;

        decParm->cfg.ref_buf_margin = GST_AML_V4L2_DEFAULT_CAP_BUF_MARGIN;
        env = getenv("V4L2_SET_AMLOGIC_MARGIN_NUM");
        if (env)
        {
            decParm->cfg.ref_buf_margin = atoi(env);
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "output cfg margin to %d", decParm->cfg.ref_buf_margin);
        }

        // dv
        gboolean dv_bl_present_flag, dv_el_present_flag;
        int dvBaseLayerPresent = -1;
        int dvEnhancementLayerPresent = -1;
        /* have base and enhancement layers both, that means its dual layer,
        dv two layer flag will be true */
        if (gst_structure_get_boolean( structure, "dv_bl_present_flag", &dv_bl_present_flag))
        {
            dvBaseLayerPresent= dv_bl_present_flag?1:0;
        }
        if (gst_structure_get_boolean( structure, "dv_el_present_flag", &dv_el_present_flag))
        {
            dvEnhancementLayerPresent= dv_el_present_flag?1:0;
        }

        /* have base and enhancement layers both, that means its dual layer, dv two layer flag will be true */
        if ( (dvBaseLayerPresent == 1) && (dvEnhancementLayerPresent == 1) )
        {
            decParm->cfg.metadata_config_flag |= (1 << 0);
        }
        else
        {
            decParm->cfg.metadata_config_flag |= (0 << 0);
        }

        /* have one of then, it's standard dv stream, Non-standard dv flag will be false */
        if ( (dvBaseLayerPresent == 0) && (dvEnhancementLayerPresent == 0) )
        {
            decParm->cfg.metadata_config_flag |= (1 << 1);
        }
        else
        {
            decParm->cfg.metadata_config_flag |= (0 << 1);
        }

        // HDR
        if ( gst_structure_has_field(structure, "colorimetry") )
        {
            const char *colorimetry= gst_structure_get_string(structure,"colorimetry");
            GstVideoColorimetry vci = {0};
            if ( colorimetry &&  gst_video_colorimetry_from_string( &vci, colorimetry ))
            {
                decParm->parms_status |= V4L2_CONFIG_PARM_DECODE_HDRINFO;
                decParm->hdr.signal_type= (1<<29); /* present flag */
                /*set default value, this is to keep up with driver hdr info synchronization*/
                decParm->hdr.signal_type |= (5<<26) | (1<<24);

                gint hdrColorimetry[4] = {0};
                hdrColorimetry[0]= (int)vci.range;
                hdrColorimetry[1]= (int)vci.matrix;
                hdrColorimetry[2]= (int)vci.transfer;
                hdrColorimetry[3]= (int)vci.primaries;
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "colorimetry: [%d,%d,%d,%d]",
                                                        hdrColorimetry[0],
                                                        hdrColorimetry[1],
                                                        hdrColorimetry[2],
                                                        hdrColorimetry[3] );
                /* range */
                switch ( hdrColorimetry[0] )
                {
                    case GST_VIDEO_COLOR_RANGE_0_255:
                    case GST_VIDEO_COLOR_RANGE_16_235:
                    decParm->hdr.signal_type |= ((hdrColorimetry[0] % 2)<<25);
                    break;
                    default:
                    break;
                }
                /* matrix coefficient */
                switch ( hdrColorimetry[1] )
                {
                    case GST_VIDEO_COLOR_MATRIX_RGB: /* RGB */
                    decParm->hdr.signal_type |= 0;
                    break;
                    case GST_VIDEO_COLOR_MATRIX_FCC: /* FCC */
                    decParm->hdr.signal_type |= 4;
                    break;
                    case GST_VIDEO_COLOR_MATRIX_BT709: /* BT709 */
                    decParm->hdr.signal_type |= 1;
                    break;
                    case GST_VIDEO_COLOR_MATRIX_BT601: /* BT601 */
                    decParm->hdr.signal_type |= 3;
                    break;
                    case GST_VIDEO_COLOR_MATRIX_SMPTE240M: /* SMPTE240M */
                    decParm->hdr.signal_type |= 7;
                    break;
                    case GST_VIDEO_COLOR_MATRIX_BT2020: /* BT2020 */
                    decParm->hdr.signal_type |= 9;
                    break;
                    default: /* unknown */
                    decParm->hdr.signal_type |= 2;
                    break;
                }
                /* transfer function */
                switch ( hdrColorimetry[2] )
                {
                    case GST_VIDEO_TRANSFER_BT709: /* BT709 */
                    decParm->hdr.signal_type |= (1<<8);
                    break;
                    case GST_VIDEO_TRANSFER_SMPTE240M: /* SMPTE240M */
                    decParm->hdr.signal_type |= (7<<8);
                    break;
                    case GST_VIDEO_TRANSFER_LOG100: /* LOG100 */
                    decParm->hdr.signal_type |= (9<<8);
                    break;
                    case GST_VIDEO_TRANSFER_LOG316: /* LOG316 */
                    decParm->hdr.signal_type |= (10<<8);
                    break;
                    case GST_VIDEO_TRANSFER_BT2020_12: /* BT2020_12 */
                    decParm->hdr.signal_type |= (15<<8);
                    break;
                    case GST_VIDEO_TRANSFER_BT2020_10: /* BT2020_10 */
                    decParm->hdr.signal_type |= (14<<8);
                    break;
                    #if ((GST_VERSION_MAJOR == 1) && (GST_VERSION_MINOR >= 18))
                    case GST_VIDEO_TRANSFER_SMPTE2084: /* SMPTE2084 */
                    decParm->hdr.signal_type |= (16<<8);
                    break;
                    #else
                    case GST_VIDEO_TRANSFER_SMPTE_ST_2084: /* SMPTE2084 */
                    decParm->hdr.signal_type |= (16<<8);
                    break;
                    #endif
                    case GST_VIDEO_TRANSFER_ARIB_STD_B67: /* ARIB_STD_B67 */
                    decParm->hdr.signal_type |= (18<<8);
                    break;
                    #if ((GST_VERSION_MAJOR == 1) && (GST_VERSION_MINOR >= 18))
                    case GST_VIDEO_TRANSFER_BT601: /* BT601 */
                    decParm->hdr.signal_type |= (3<<8);
                    break;
                    #endif
                    case GST_VIDEO_TRANSFER_GAMMA10: /* GAMMA10 */
                    case GST_VIDEO_TRANSFER_GAMMA18: /* GAMMA18 */
                    case GST_VIDEO_TRANSFER_GAMMA20: /* GAMMA20 */
                    case GST_VIDEO_TRANSFER_GAMMA22: /* GAMMA22 */
                    case GST_VIDEO_TRANSFER_SRGB: /* SRGB */
                    case GST_VIDEO_TRANSFER_GAMMA28: /* GAMMA28 */
                    case GST_VIDEO_TRANSFER_ADOBERGB: /* ADOBERGB */
                    default:
                    break;
                }
                /* primaries */
                switch ( hdrColorimetry[3] )
                {
                    case GST_VIDEO_COLOR_PRIMARIES_BT709: /* BT709 */
                    decParm->hdr.signal_type |= ((1<<24)|(1<<16));
                    break;
                    case GST_VIDEO_COLOR_PRIMARIES_BT470M: /* BT470M */
                    decParm->hdr.signal_type |= ((1<<24)|(4<<16));
                    break;
                    case GST_VIDEO_COLOR_PRIMARIES_BT470BG: /* BT470BG */
                    decParm->hdr.signal_type |= ((1<<24)|(5<<16));
                    break;
                    case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M: /* SMPTE170M */
                    decParm->hdr.signal_type |= ((1<<24)|(6<<16));
                    break;
                    case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M: /* SMPTE240M */
                    decParm->hdr.signal_type |= ((1<<24)|(7<<16));
                    break;
                    case GST_VIDEO_COLOR_PRIMARIES_FILM: /* FILM */
                    decParm->hdr.signal_type |= ((1<<24)|(8<<16));
                    break;
                    case GST_VIDEO_COLOR_PRIMARIES_BT2020: /* BT2020 */
                    decParm->hdr.signal_type |= ((1<<24)|(9<<16));
                    break;
                    case GST_VIDEO_COLOR_PRIMARIES_ADOBERGB: /* ADOBERGB */
                    default:
                    break;
                }
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "HDR signal_type %X", decParm->hdr.signal_type);
            }

            //why remove  this colorimetry?
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "got caps %" GST_PTR_FORMAT, caps);
            GstStructure *st = gst_caps_get_structure(caps, 0);
            GstCapsFeatures *features = gst_caps_get_features(caps, 0);

            if (gst_structure_has_field(st, "colorimetry"))
            {
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "have colorimetry");
            }

            if (st && features)
            {
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "trace in remove colorimetry");
                gst_structure_remove_field(st, "colorimetry");
                gst_caps_features_remove(features, "colorimetry");
            }
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "caps after remove colorimetry %" GST_PTR_FORMAT, caps);
        }

        const char * field = NULL;
        if (gst_structure_has_field(structure, "mastering-display-metadata")) {
            field = "mastering-display-metadata";
        } else if (gst_structure_has_field(structure, "mastering-display-info")) {
            field = "mastering-display-info";
        }

        if ( field )
        {
            const char *masteringDisplay= gst_structure_get_string(structure, field);
            float hdrMasteringDisplay[10];
            if ( masteringDisplay && sscanf( masteringDisplay, "%f:%f:%f:%f:%f:%f:%f:%f:%f:%f",
                                                                &hdrMasteringDisplay[0],
                                                                &hdrMasteringDisplay[1],
                                                                &hdrMasteringDisplay[2],
                                                                &hdrMasteringDisplay[3],
                                                                &hdrMasteringDisplay[4],
                                                                &hdrMasteringDisplay[5],
                                                                &hdrMasteringDisplay[6],
                                                                &hdrMasteringDisplay[7],
                                                                &hdrMasteringDisplay[8],
                                                                &hdrMasteringDisplay[9] ) == 10 )
            {
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "mastering display [%f,%f,%f,%f,%f,%f,%f,%f,%f,%f]",
                                                        hdrMasteringDisplay[0],
                                                        hdrMasteringDisplay[1],
                                                        hdrMasteringDisplay[2],
                                                        hdrMasteringDisplay[3],
                                                        hdrMasteringDisplay[4],
                                                        hdrMasteringDisplay[5],
                                                        hdrMasteringDisplay[6],
                                                        hdrMasteringDisplay[7],
                                                        hdrMasteringDisplay[8],
                                                        hdrMasteringDisplay[9] );

                decParm->hdr.color_parms.present_flag= 1;
                decParm->hdr.color_parms.primaries[2][0]= (uint32_t)(hdrMasteringDisplay[0]*50000); /* R.x */
                decParm->hdr.color_parms.primaries[2][1]= (uint32_t)(hdrMasteringDisplay[1]*50000); /* R.y */
                decParm->hdr.color_parms.primaries[0][0]= (uint32_t)(hdrMasteringDisplay[2]*50000); /* G.x */
                decParm->hdr.color_parms.primaries[0][1]= (uint32_t)(hdrMasteringDisplay[3]*50000); /* G.y */
                decParm->hdr.color_parms.primaries[1][0]= (uint32_t)(hdrMasteringDisplay[4]*50000); /* B.x */
                decParm->hdr.color_parms.primaries[1][1]= (uint32_t)(hdrMasteringDisplay[5]*50000); /* B.y */
                decParm->hdr.color_parms.white_point[0]= (uint32_t)(hdrMasteringDisplay[6]*50000);
                decParm->hdr.color_parms.white_point[1]= (uint32_t)(hdrMasteringDisplay[7]*50000);
                decParm->hdr.color_parms.luminance[0]= (uint32_t)(hdrMasteringDisplay[8]);
                decParm->hdr.color_parms.luminance[1]= (uint32_t)(hdrMasteringDisplay[9]);
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "HDR mastering: primaries %X %X %X %X %X %X",
                                                        decParm->hdr.color_parms.primaries[2][0],
                                                        decParm->hdr.color_parms.primaries[2][1],
                                                        decParm->hdr.color_parms.primaries[0][0],
                                                        decParm->hdr.color_parms.primaries[0][1],
                                                        decParm->hdr.color_parms.primaries[1][0],
                                                        decParm->hdr.color_parms.primaries[1][1] );
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "HDR mastering: white point: %X %X",
                                                        decParm->hdr.color_parms.white_point[0],
                                                        decParm->hdr.color_parms.white_point[1] );
                GST_DEBUG_OBJECT(v4l2object->dbg_obj, "HDR mastering: luminance: %X %X",
                                                        decParm->hdr.color_parms.luminance[0],
                                                        decParm->hdr.color_parms.luminance[1] );
            }

            GstStructure *st = gst_caps_get_structure(caps, 0);
            GstCapsFeatures * features = gst_caps_get_features(caps, 0);
            if (st && features)
            {
                gst_structure_remove_fields(st, field, NULL);
                gst_caps_features_remove(features, field);
            }
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "caps after remove %s %" GST_PTR_FORMAT, field, caps);
        }
    }
    else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
    {
        GstAmlV4l2VideoDec *self = (GstAmlV4l2VideoDec*) v4l2object->element;

        if (!get_amlogic_vdec_parm(v4l2object, streamparm))
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "can't get vdec parm");
            return;
        }

        decParm->cfg.double_write_mode = gst_aml_config_dw(v4l2object, self->v4l2output->fmtdesc->pixelformat,
                width, height, is_interlaced);
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "capture cfg dw mode to %d", decParm->cfg.double_write_mode);

        if (needSpecConfigForFg(v4l2object))
        {
            decParm->cfg.double_write_mode = VDEC_DW_MMU_1;
            GST_DEBUG_OBJECT(v4l2object->dbg_obj,"set fg dw mode %d", decParm->cfg.double_write_mode);
        }
        v4l2object->dw_mode = decParm->cfg.double_write_mode;
    }
    else
    {
        GST_ERROR_OBJECT(v4l2object->dbg_obj,"can't deal with. please check buffer type.");
        return;
    }

    if (use_ext_config)
    {
        memset(&ctrls, 0, sizeof(ctrls));
        memset(&control, 0, sizeof(control));
        control.id = AML_V4L2_DEC_PARMS_CONFIG;
        control.ptr = decParm;
        control.size = sizeof(struct aml_dec_params);
        ctrls.count = 1;
        ctrls.controls = &control;
        if (v4l2object->ioctl( v4l2object->video_fd, VIDIOC_S_EXT_CTRLS, &ctrls ) < 0)
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "set vdec parm fail");
        }
    }
    else
    {
        if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_S_PARM, streamparm) < 0)
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "set vdec parm fail");
        }
    }
}

static gboolean
gst_aml_v4l2_object_set_format_full(GstAmlV4l2Object *v4l2object, GstCaps *caps,
                                    gboolean try_only, GstAmlV4l2Error *error)
{
    gint fd = v4l2object->video_fd;
    struct v4l2_format format;
    struct v4l2_streamparm streamparm;
    enum v4l2_field field;
    guint32 pixelformat;
    struct v4l2_fmtdesc *fmtdesc;
    GstVideoInfo info;
    GstVideoAlignment align;
    gint width, height, fps_n, fps_d;
    gint n_v4l_planes;
    gint i = 0;
    gboolean is_mplane;
    enum v4l2_colorspace colorspace = 0;
    enum v4l2_quantization range = 0;
    enum v4l2_ycbcr_encoding matrix = 0;
    enum v4l2_xfer_func transfer = 0;
    GstStructure *s;
    gboolean disable_colorimetry = FALSE;

    g_return_val_if_fail(!v4l2object->skip_try_fmt_probes ||
                             gst_caps_is_writable(caps),
                         FALSE);

    GST_AML_V4L2_CHECK_OPEN(v4l2object);
    if (!try_only)
        GST_AML_V4L2_CHECK_NOT_ACTIVE(v4l2object);

    is_mplane = V4L2_TYPE_IS_MULTIPLANAR(v4l2object->type);

    gst_video_info_init(&info);
    gst_video_alignment_reset(&align);

    if (!gst_aml_v4l2_object_get_caps_info(v4l2object, caps, &fmtdesc, &info))
        goto invalid_caps;

    pixelformat = fmtdesc->pixelformat;
    width = GST_VIDEO_INFO_WIDTH(&info);
    height = GST_VIDEO_INFO_HEIGHT(&info);
    fps_n = GST_VIDEO_INFO_FPS_N(&info);
    fps_d = GST_VIDEO_INFO_FPS_D(&info);

    GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Check image size");
    struct v4l2_frmsizeenum size;
    memset (&size, 0, sizeof (struct v4l2_frmsizeenum));
    size.index = 0;
    size.pixel_format = pixelformat;
    if (v4l2object->ioctl (fd, VIDIOC_ENUM_FRAMESIZES, &size) < 0)
        return FALSE;
    if (size.type == V4L2_FRMSIZE_TYPE_STEPWISE)
    {
        guint32 maxw, maxh;
        maxw = MIN (size.stepwise.max_width, G_MAXINT);
        maxh = MIN (size.stepwise.max_height, G_MAXINT);
        GST_DEBUG_OBJECT (v4l2object->dbg_obj, "image from caps w_h:%d_%d", width, height);
        GST_DEBUG_OBJECT (v4l2object->dbg_obj, "v4l2 support max w_h:%d_%d", maxw, maxh);
        if (width*height > maxw*maxh)
            return FALSE;
        GST_DEBUG_OBJECT (v4l2object->dbg_obj, "Check image size ok");
    }

    //set amlogic params here,because we need pix format to set dw mode
    memset(&streamparm, 0x00, sizeof(struct v4l2_streamparm));
    set_amlogic_vdec_parm(v4l2object, &streamparm, caps, pixelformat);

    /* if encoded format (GST_VIDEO_INFO_N_PLANES return 0)
     * or if contiguous is prefered */
    n_v4l_planes = GST_VIDEO_INFO_N_PLANES(&info);
    if (!n_v4l_planes || !v4l2object->prefered_non_contiguous)
        n_v4l_planes = 1;

    if (GST_VIDEO_INFO_IS_INTERLACED(&info))
    {
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "interlaced video");
        /* ideally we would differentiate between types of interlaced video
         * but there is not sufficient information in the caps..
         */
        field = V4L2_FIELD_INTERLACED;
    }
    else
    {
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "progressive video");
        field = V4L2_FIELD_NONE;
    }

    /* We first pick the main colorspace from the primaries */
    switch (info.colorimetry.primaries)
    {
    case GST_VIDEO_COLOR_PRIMARIES_BT709:
        /* There is two colorspaces using these primaries, use the range to
         * differentiate */
        if (info.colorimetry.range == GST_VIDEO_COLOR_RANGE_16_235)
            colorspace = V4L2_COLORSPACE_REC709;
        else
            colorspace = V4L2_COLORSPACE_SRGB;
        break;
    case GST_VIDEO_COLOR_PRIMARIES_BT2020:
        colorspace = V4L2_COLORSPACE_BT2020;
        break;
    case GST_VIDEO_COLOR_PRIMARIES_BT470M:
        colorspace = V4L2_COLORSPACE_470_SYSTEM_M;
        break;
    case GST_VIDEO_COLOR_PRIMARIES_BT470BG:
        colorspace = V4L2_COLORSPACE_470_SYSTEM_BG;
        break;
    case GST_VIDEO_COLOR_PRIMARIES_SMPTE170M:
        colorspace = V4L2_COLORSPACE_SMPTE170M;
        break;
    case GST_VIDEO_COLOR_PRIMARIES_SMPTE240M:
        colorspace = V4L2_COLORSPACE_SMPTE240M;
        break;

    case GST_VIDEO_COLOR_PRIMARIES_FILM:
    case GST_VIDEO_COLOR_PRIMARIES_UNKNOWN:
        /* We don't know, we will guess */
        break;

    default:
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Unknown colorimetry primaries %d", info.colorimetry.primaries);
        break;
    }

    switch (info.colorimetry.range)
    {
    case GST_VIDEO_COLOR_RANGE_0_255:
        range = V4L2_QUANTIZATION_FULL_RANGE;
        break;
    case GST_VIDEO_COLOR_RANGE_16_235:
        range = V4L2_QUANTIZATION_LIM_RANGE;
        break;
    case GST_VIDEO_COLOR_RANGE_UNKNOWN:
        /* We let the driver pick a default one */
        break;
    default:
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Unknown colorimetry range %d", info.colorimetry.range);
        break;
    }

    switch (info.colorimetry.matrix)
    {
    case GST_VIDEO_COLOR_MATRIX_RGB:
        /* Unspecified, leave to default */
        break;
        /* FCC is about the same as BT601 with less digit */
    case GST_VIDEO_COLOR_MATRIX_FCC:
    case GST_VIDEO_COLOR_MATRIX_BT601:
        matrix = V4L2_YCBCR_ENC_601;
        break;
    case GST_VIDEO_COLOR_MATRIX_BT709:
        matrix = V4L2_YCBCR_ENC_709;
        break;
    case GST_VIDEO_COLOR_MATRIX_SMPTE240M:
        matrix = V4L2_YCBCR_ENC_SMPTE240M;
        break;
    case GST_VIDEO_COLOR_MATRIX_BT2020:
        matrix = V4L2_YCBCR_ENC_BT2020;
        break;
    case GST_VIDEO_COLOR_MATRIX_UNKNOWN:
        /* We let the driver pick a default one */
        break;
    default:
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Unknown colorimetry matrix %d", info.colorimetry.matrix);
        break;
    }

    switch (info.colorimetry.transfer)
    {
    case GST_VIDEO_TRANSFER_GAMMA18:
    case GST_VIDEO_TRANSFER_GAMMA20:
    case GST_VIDEO_TRANSFER_GAMMA22:
    case GST_VIDEO_TRANSFER_GAMMA28:
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "GAMMA 18, 20, 22, 28 transfer functions not supported");
        /* fallthrough */
    case GST_VIDEO_TRANSFER_GAMMA10:
        transfer = V4L2_XFER_FUNC_NONE;
        break;
    case GST_VIDEO_TRANSFER_BT2020_12:
    case GST_VIDEO_TRANSFER_BT709:
        transfer = V4L2_XFER_FUNC_709;
        break;
    case GST_VIDEO_TRANSFER_SMPTE240M:
        transfer = V4L2_XFER_FUNC_SMPTE240M;
        break;
    case GST_VIDEO_TRANSFER_SRGB:
        transfer = V4L2_XFER_FUNC_SRGB;
        break;
    case GST_VIDEO_TRANSFER_LOG100:
    case GST_VIDEO_TRANSFER_LOG316:
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "LOG 100, 316 transfer functions not supported");
        /* FIXME No known sensible default, maybe AdobeRGB ? */
        break;
    case GST_VIDEO_TRANSFER_UNKNOWN:
        /* We let the driver pick a default one */
        break;
    default:
        GST_WARNING_OBJECT(v4l2object->dbg_obj,
                           "Unknown colorimetry tranfer %d", info.colorimetry.transfer);
        break;
    }

    if (colorspace == 0)
    {
        /* Try to guess colorspace according to pixelformat and size */
        if (GST_VIDEO_INFO_IS_YUV(&info))
        {
            if (range == V4L2_QUANTIZATION_FULL_RANGE && matrix == V4L2_YCBCR_ENC_601 && transfer == 0)
            {
                /* Full range BT.601 YCbCr encoding with unknown primaries and transfer
                 * function most likely is JPEG */
                colorspace = V4L2_COLORSPACE_JPEG;
                transfer = V4L2_XFER_FUNC_SRGB;
            }
            else
            {
                /* SD streams likely use SMPTE170M and HD streams REC709 */
                if (width <= 720 && height <= 576)
                    colorspace = V4L2_COLORSPACE_SMPTE170M;
                else
                    colorspace = V4L2_COLORSPACE_REC709;
            }
        }
        else if (GST_VIDEO_INFO_IS_RGB(&info))
        {
            colorspace = V4L2_COLORSPACE_SRGB;
            transfer = V4L2_XFER_FUNC_NONE;
        }
    }

    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Desired format %dx%d, format "
                                          "%" GST_FOURCC_FORMAT " stride: %d",
                     width, height,
                     GST_FOURCC_ARGS(pixelformat), GST_VIDEO_INFO_PLANE_STRIDE(&info, 0));

    memset(&format, 0x00, sizeof(struct v4l2_format));
    format.type = v4l2object->type;

    if (is_mplane)
    {
        format.type = v4l2object->type;
        format.fmt.pix_mp.pixelformat = pixelformat;
        format.fmt.pix_mp.width = width;
        format.fmt.pix_mp.height = height;
        format.fmt.pix_mp.field = field;
        format.fmt.pix_mp.num_planes = n_v4l_planes;

        /* try to ask our prefered stride but it's not a failure if not
         * accepted */
        for (i = 0; i < n_v4l_planes; i++)
        {
            gint stride = GST_VIDEO_INFO_PLANE_STRIDE(&info, i);

            if (GST_VIDEO_FORMAT_INFO_IS_TILED(info.finfo))
                stride = GST_VIDEO_TILE_X_TILES(stride) << GST_VIDEO_FORMAT_INFO_TILE_WS(info.finfo);

            format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
        }

        if (GST_VIDEO_INFO_FORMAT(&info) == GST_VIDEO_FORMAT_ENCODED)
        {
            if (v4l2object->req_mode == GST_V4L2_IO_DMABUF_IMPORT)
                format.fmt.pix_mp.plane_fmt[0].sizeimage = 1;
            else
                format.fmt.pix_mp.plane_fmt[0].sizeimage = v4l2object->low_memory_mode ? LOW_MEM_ENCODED_BUFFER_SIZE : ENCODED_BUFFER_SIZE;
        }
    }
    else
    {
        gint stride = GST_VIDEO_INFO_PLANE_STRIDE(&info, 0);

        format.type = v4l2object->type;

        format.fmt.pix.width = width;
        format.fmt.pix.height = height;
        format.fmt.pix.pixelformat = pixelformat;
        format.fmt.pix.field = field;

        if (GST_VIDEO_FORMAT_INFO_IS_TILED(info.finfo))
            stride = GST_VIDEO_TILE_X_TILES(stride) << GST_VIDEO_FORMAT_INFO_TILE_WS(info.finfo);

        /* try to ask our prefered stride */
        format.fmt.pix.bytesperline = stride;

        if (GST_VIDEO_INFO_FORMAT(&info) == GST_VIDEO_FORMAT_ENCODED)
        {
            if (v4l2object->req_mode == GST_V4L2_IO_DMABUF_IMPORT)
                format.fmt.pix_mp.plane_fmt[0].sizeimage = 1;
            else
                format.fmt.pix_mp.plane_fmt[0].sizeimage = v4l2object->low_memory_mode ? LOW_MEM_ENCODED_BUFFER_SIZE : ENCODED_BUFFER_SIZE;
        }
    }

    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Desired format is %dx%d, format "
                                          "%" GST_FOURCC_FORMAT ", nb planes %d",
                     format.fmt.pix.width,
                     format.fmt.pix_mp.height,
                     GST_FOURCC_ARGS(format.fmt.pix.pixelformat),
                     is_mplane ? format.fmt.pix_mp.num_planes : 1);

#ifndef GST_DISABLE_GST_DEBUG
    if (is_mplane)
    {
        for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "  stride %d",
                             format.fmt.pix_mp.plane_fmt[i].bytesperline);
    }
    else
    {
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "  stride %d",
                         format.fmt.pix.bytesperline);
    }
#endif

    if (is_mplane)
    {
        format.fmt.pix_mp.colorspace = colorspace;
        format.fmt.pix_mp.quantization = range;
        format.fmt.pix_mp.ycbcr_enc = matrix;
        format.fmt.pix_mp.xfer_func = transfer;
    }
    else
    {
        format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
        format.fmt.pix.colorspace = colorspace;
        format.fmt.pix.quantization = range;
        format.fmt.pix.ycbcr_enc = matrix;
        format.fmt.pix.xfer_func = transfer;
    }

    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Desired colorspace is %d:%d:%d:%d",
                     colorspace, range, matrix, transfer);

    if (try_only)
    {
        if (v4l2object->ioctl(fd, VIDIOC_TRY_FMT, &format) < 0)
            goto try_fmt_failed;
    }
    else
    {
        if (v4l2object->ioctl(fd, VIDIOC_S_FMT, &format) < 0)
            goto set_fmt_failed;
    }

    if (is_mplane)
    {
        colorspace = format.fmt.pix_mp.colorspace;
        range = format.fmt.pix_mp.quantization;
        matrix = format.fmt.pix_mp.ycbcr_enc;
        transfer = format.fmt.pix_mp.xfer_func;
    }
    else
    {
        colorspace = format.fmt.pix.colorspace;
        range = format.fmt.pix.quantization;
        matrix = format.fmt.pix.ycbcr_enc;
        transfer = format.fmt.pix.xfer_func;
    }

    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Got format of %dx%d, format "
                                          "%" GST_FOURCC_FORMAT ", nb planes %d, colorspace %d:%d:%d:%d",
                     format.fmt.pix.width, format.fmt.pix_mp.height,
                     GST_FOURCC_ARGS(format.fmt.pix.pixelformat),
                     is_mplane ? format.fmt.pix_mp.num_planes : 1,
                     colorspace, range, matrix, transfer);

#ifndef GST_DISABLE_GST_DEBUG
    if (is_mplane)
    {
        for (i = 0; i < format.fmt.pix_mp.num_planes; i++)
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "  stride %d, sizeimage %d",
                             format.fmt.pix_mp.plane_fmt[i].bytesperline,
                             format.fmt.pix_mp.plane_fmt[i].sizeimage);
    }
    else
    {
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "  stride %d, sizeimage %d",
                         format.fmt.pix.bytesperline, format.fmt.pix.sizeimage);
    }
#endif

    if (format.fmt.pix.pixelformat != pixelformat)
        goto invalid_pixelformat;

    /* Only negotiate size with raw data.
     * For some codecs the dimensions are *not* in the bitstream, IIRC VC1
     * in ASF mode for example, there is also not reason for a driver to
     * change the size. */
    if (info.finfo->format != GST_VIDEO_FORMAT_ENCODED)
    {
        /* We can crop larger images */
        if (format.fmt.pix.width < width || format.fmt.pix.height < height)
            goto invalid_dimensions;

        /* Note, this will be adjusted if upstream has non-centered cropping. */
        align.padding_top = 0;
        align.padding_bottom = format.fmt.pix.height - height;
        align.padding_left = 0;
        align.padding_right = format.fmt.pix.width - width;
    }

    if (is_mplane && format.fmt.pix_mp.num_planes != n_v4l_planes)
        goto invalid_planes;

    /* used to check colorimetry and interlace mode fields presence */
    s = gst_caps_get_structure(caps, 0);

    if (!gst_aml_v4l2_object_get_interlace_mode(format.fmt.pix.field,
                                                &info.interlace_mode))
        goto invalid_field;
    if (gst_structure_has_field(s, "interlace-mode"))
    {
        if (format.fmt.pix.field != field)
            goto invalid_field;
    }

    if (gst_aml_v4l2_object_get_colorspace(&format, &info.colorimetry))
    {
        if (gst_structure_has_field(s, "colorimetry"))
        {
            if (!gst_aml_v4l2_video_colorimetry_matches(&info.colorimetry, gst_structure_get_string(s, "colorimetry")))
            {
                // goto invalid_colorimetry;
            }
        }
    }
    else
    {
        /* The driver (or libv4l2) is miss-behaving, just ignore colorimetry from
         * the TRY_FMT */
        disable_colorimetry = TRUE;
        if (gst_structure_has_field(s, "colorimetry"))
            gst_structure_remove_field(s, "colorimetry");
    }

    /* In case we have skipped the try_fmt probes, we'll need to set the
     * colorimetry and interlace-mode back into the caps. */
    if (v4l2object->skip_try_fmt_probes)
    {
        if (!disable_colorimetry && !gst_structure_has_field(s, "colorimetry"))
        {
            gchar *str = gst_video_colorimetry_to_string(&info.colorimetry);
            gst_structure_set(s, "colorimetry", G_TYPE_STRING, str, NULL);
            g_free(str);
        }

        if (!gst_structure_has_field(s, "interlace-mode"))
            gst_structure_set(s, "interlace-mode", G_TYPE_STRING,
                              gst_video_interlace_mode_to_string(info.interlace_mode), NULL);
    }

    if (try_only) /* good enough for trying only */
        return TRUE;

    if (GST_VIDEO_INFO_HAS_ALPHA(&info))
    {
        struct v4l2_control ctl = {
            0,
        };
        ctl.id = V4L2_CID_ALPHA_COMPONENT;
        ctl.value = 0xff;

        if (v4l2object->ioctl(fd, VIDIOC_S_CTRL, &ctl) < 0)
            GST_WARNING_OBJECT(v4l2object->dbg_obj,
                               "Failed to set alpha component value");
    }

    /* Is there a reason we require the caller to always specify a framerate? */
    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Desired framerate: %u/%u", fps_n,
                     fps_d);

    if (v4l2object->ioctl(fd, VIDIOC_G_PARM, &streamparm) < 0)
        goto get_parm_failed;

    if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || v4l2object->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
    {
        GST_VIDEO_INFO_FPS_N(&info) =
            streamparm.parm.capture.timeperframe.denominator;
        GST_VIDEO_INFO_FPS_D(&info) =
            streamparm.parm.capture.timeperframe.numerator;

        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Got capture framerate: %u/%u",
                         streamparm.parm.capture.timeperframe.denominator,
                         streamparm.parm.capture.timeperframe.numerator);

        /* We used to skip frame rate setup if the camera was already setup
         * with the requested frame rate. This breaks some cameras though,
         * causing them to not output data (several models of Thinkpad cameras
         * have this problem at least).
         * So, don't skip. */
        GST_LOG_OBJECT(v4l2object->dbg_obj, "Setting capture framerate to %u/%u",
                       fps_n, fps_d);
        /* We want to change the frame rate, so check whether we can. Some cheap USB
         * cameras don't have the capability */
        if ((streamparm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME) == 0)
        {
            GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                             "Not setting capture framerate (not supported)");
            goto done;
        }

        /* Note: V4L2 wants the frame interval, we have the frame rate */
        streamparm.parm.capture.timeperframe.numerator = fps_d;
        streamparm.parm.capture.timeperframe.denominator = fps_n;

        /* Amlogic sets parameters to the decoder and only supports delivery of private structures */
        //some cheap USB cam's won't accept any change */
        //if (v4l2object->ioctl(fd, VIDIOC_S_PARM, &streamparm) < 0)
        //goto set_parm_failed;

        if (streamparm.parm.capture.timeperframe.numerator > 0 &&
            streamparm.parm.capture.timeperframe.denominator > 0)
        {
            /* get new values */
            fps_d = streamparm.parm.capture.timeperframe.numerator;
            fps_n = streamparm.parm.capture.timeperframe.denominator;

            GST_INFO_OBJECT(v4l2object->dbg_obj, "Set capture framerate to %u/%u",
                            fps_n, fps_d);
        }
        else
        {
            /* fix v4l2 capture driver to provide framerate values */
            GST_WARNING_OBJECT(v4l2object->dbg_obj,
                               "Reuse caps framerate %u/%u - fix v4l2 capture driver", fps_n, fps_d);
        }

        GST_VIDEO_INFO_FPS_N(&info) = fps_n;
        GST_VIDEO_INFO_FPS_D(&info) = fps_d;
    }
    else if (v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || v4l2object->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
    {
        GST_VIDEO_INFO_FPS_N(&info) =
            streamparm.parm.output.timeperframe.denominator;
        GST_VIDEO_INFO_FPS_D(&info) =
            streamparm.parm.output.timeperframe.numerator;

        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Got output framerate: %u/%u",
                         streamparm.parm.output.timeperframe.denominator,
                         streamparm.parm.output.timeperframe.numerator);

        GST_LOG_OBJECT(v4l2object->dbg_obj, "Setting output framerate to %u/%u",
                       fps_n, fps_d);
        if ((streamparm.parm.output.capability & V4L2_CAP_TIMEPERFRAME) == 0)
        {
            GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                             "Not setting output framerate (not supported)");
            goto done;
        }

        /* Note: V4L2 wants the frame interval, we have the frame rate */
        streamparm.parm.output.timeperframe.numerator = fps_d;
        streamparm.parm.output.timeperframe.denominator = fps_n;

        /*Amlogic sets parameters to the decoder and only supports delivery of private structures*/
        //if (v4l2object->ioctl(fd, VIDIOC_S_PARM, &streamparm) < 0)
        //goto set_parm_failed;

        if (streamparm.parm.output.timeperframe.numerator > 0 &&
            streamparm.parm.output.timeperframe.denominator > 0)
        {
            /* get new values */
            fps_d = streamparm.parm.output.timeperframe.numerator;
            fps_n = streamparm.parm.output.timeperframe.denominator;

            GST_INFO_OBJECT(v4l2object->dbg_obj, "Set output framerate to %u/%u",
                            fps_n, fps_d);
        }
        else
        {
            /* fix v4l2 output driver to provide framerate values */
            GST_WARNING_OBJECT(v4l2object->dbg_obj,
                               "Reuse caps framerate %u/%u - fix v4l2 output driver", fps_n, fps_d);
        }

        GST_VIDEO_INFO_FPS_N(&info) = fps_n;
        GST_VIDEO_INFO_FPS_D(&info) = fps_d;
    }

done:
    /* add boolean return, so we can fail on drivers bugs */
    gst_aml_v4l2_object_save_format(v4l2object, fmtdesc, &format, &info, &align);

    /* now configure the pool */
    if (!gst_aml_v4l2_object_setup_pool(v4l2object, caps))
        goto pool_failed;

    return TRUE;

    /* ERRORS */
invalid_caps:
{
    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "can't parse caps %" GST_PTR_FORMAT,
                     caps);

    GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                       (_("Invalid caps")), ("Can't parse caps %" GST_PTR_FORMAT, caps));
    return FALSE;
}
try_fmt_failed:
{
    if (errno == EINVAL)
    {
        GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                           (_("Device '%s' has no supported format"), v4l2object->videodev),
                           ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
                            GST_FOURCC_ARGS(pixelformat), width, height,
                            g_strerror(errno)));
    }
    else
    {
        GST_AML_V4L2_ERROR(error, RESOURCE, FAILED,
                           (_("Device '%s' failed during initialization"),
                            v4l2object->videodev),
                           ("Call to TRY_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
                            GST_FOURCC_ARGS(pixelformat), width, height,
                            g_strerror(errno)));
    }
    return FALSE;
}
set_fmt_failed:
{
    if (errno == EBUSY)
    {
        GST_AML_V4L2_ERROR(error, RESOURCE, BUSY,
                           (_("Device '%s' is busy"), v4l2object->videodev),
                           ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
                            GST_FOURCC_ARGS(pixelformat), width, height,
                            g_strerror(errno)));
    }
    else if (errno == EINVAL)
    {
        GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                           (_("Device '%s' has no supported format"), v4l2object->videodev),
                           ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
                            GST_FOURCC_ARGS(pixelformat), width, height,
                            g_strerror(errno)));
    }
    else
    {
        GST_AML_V4L2_ERROR(error, RESOURCE, FAILED,
                           (_("Device '%s' failed during initialization"),
                            v4l2object->videodev),
                           ("Call to S_FMT failed for %" GST_FOURCC_FORMAT " @ %dx%d: %s",
                            GST_FOURCC_ARGS(pixelformat), width, height,
                            g_strerror(errno)));
    }
    return FALSE;
}
invalid_dimensions:
{
    GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                       (_("Device '%s' cannot capture at %dx%d"),
                        v4l2object->videodev, width, height),
                       ("Tried to capture at %dx%d, but device returned size %dx%d",
                        width, height, format.fmt.pix.width, format.fmt.pix.height));
    return FALSE;
}
invalid_pixelformat:
{
    GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                       (_("Device '%s' cannot capture in the specified format"),
                        v4l2object->videodev),
                       ("Tried to capture in %" GST_FOURCC_FORMAT
                        ", but device returned format"
                        " %" GST_FOURCC_FORMAT,
                        GST_FOURCC_ARGS(pixelformat),
                        GST_FOURCC_ARGS(format.fmt.pix.pixelformat)));
    return FALSE;
}
invalid_planes:
{
    GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                       (_("Device '%s' does support non-contiguous planes"),
                        v4l2object->videodev),
                       ("Device wants %d planes", format.fmt.pix_mp.num_planes));
    return FALSE;
}
invalid_field:
{
    enum v4l2_field wanted_field;

    if (is_mplane)
        wanted_field = format.fmt.pix_mp.field;
    else
        wanted_field = format.fmt.pix.field;

    GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                       (_("Device '%s' does not support %s interlacing"),
                        v4l2object->videodev,
                        field == V4L2_FIELD_NONE ? "progressive" : "interleaved"),
                       ("Device wants %s interlacing",
                        wanted_field == V4L2_FIELD_NONE ? "progressive" : "interleaved"));
    return FALSE;
}
#ifdef DELETE_FOR_LGE
invalid_colorimetry:
{
    gchar *wanted_colorimetry;

    wanted_colorimetry = gst_video_colorimetry_to_string(&info.colorimetry);

    GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                       (_("Device '%s' does not support %s colorimetry"),
                        v4l2object->videodev, gst_structure_get_string(s, "colorimetry")),
                       ("Device wants %s colorimetry", wanted_colorimetry));

    g_free(wanted_colorimetry);
    return FALSE;
}
#endif
get_parm_failed:
{
    /* it's possible that this call is not supported */
    if (errno != EINVAL && errno != ENOTTY)
    {
        GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                           (_("Could not get parameters on device '%s'"),
                            v4l2object->videodev),
                           GST_ERROR_SYSTEM);
    }
    goto done;
}
set_parm_failed:
{
    GST_AML_V4L2_ERROR(error, RESOURCE, SETTINGS,
                       (_("Video device did not accept new frame rate setting.")),
                       GST_ERROR_SYSTEM);
    goto done;
}
pool_failed:
{
    /* setup_pool already send the error */
    return FALSE;
}
}

gboolean
gst_aml_v4l2_object_set_format(GstAmlV4l2Object *v4l2object, GstCaps *caps,
                               GstAmlV4l2Error *error)
{
    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Setting format to %" GST_PTR_FORMAT,
                     caps);
    return gst_aml_v4l2_object_set_format_full(v4l2object, caps, FALSE, error);
}

gboolean
gst_aml_v4l2_object_try_format(GstAmlV4l2Object *v4l2object, GstCaps *caps,
                               GstAmlV4l2Error *error)
{
    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "Trying format %" GST_PTR_FORMAT,
                     caps);
    return gst_aml_v4l2_object_set_format_full(v4l2object, caps, TRUE, error);
}

GstFlowReturn
gst_aml_v4l2_object_poll(GstAmlV4l2Object *v4l2object)
{
    gint ret;

    if (!v4l2object->can_poll_device)
        goto done;

    GST_LOG_OBJECT(v4l2object, "polling device");

again:
    ret = gst_poll_wait(v4l2object->poll, GST_CLOCK_TIME_NONE);
    if (G_UNLIKELY(ret < 0))
    {
        switch (errno)
        {
        case EBUSY:
            goto stopped;
        case EAGAIN:
        case EINTR:
            goto again;
        case ENXIO:
            GST_WARNING_OBJECT(v4l2object,
                               "v4l2 device doesn't support polling. Disabling"
                               " using libv4l2 in this case may cause deadlocks");
            v4l2object->can_poll_device = FALSE;
            goto done;
        default:
            goto select_error;
        }
    }

done:
    return GST_FLOW_OK;

    /* ERRORS */
stopped:
{
    GST_DEBUG_OBJECT(v4l2object, "stop called");
    return GST_FLOW_FLUSHING;
}
select_error:
{
    GST_ELEMENT_ERROR(v4l2object->element, RESOURCE, READ, (NULL),
                      ("poll error %d: %s (%d)", ret, g_strerror(errno), errno));
    return GST_FLOW_ERROR;
}
}

GstFlowReturn
gst_aml_v4l2_object_dqevent(GstAmlV4l2Object *v4l2object)
{
    GstFlowReturn res;
    struct v4l2_event evt;

    if ((res = gst_aml_v4l2_object_poll(v4l2object)) != GST_FLOW_OK)
        goto poll_failed;

    //only read v4l2 pri event
    if (!gst_poll_fd_can_read_pri(v4l2object->poll, &v4l2object->pollfd))
    {
        GST_DEBUG_OBJECT(v4l2object, "not v4l2 pri event");
        return GST_FLOW_OK;
    }
    memset(&evt, 0x00, sizeof(struct v4l2_event));
    if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_DQEVENT, &evt) < 0)
        goto dqevent_failed;

    switch (evt.type)
    {
    case V4L2_EVENT_SOURCE_CHANGE:
        return GST_AML_V4L2_FLOW_SOURCE_CHANGE;
        break;
    case V4L2_EVENT_EOS:
        return GST_AML_V4L2_FLOW_LAST_BUFFER;
        break;
    default:
        break;
    }

    return GST_FLOW_OK;

    /* ERRORS */
poll_failed:
{
    GST_DEBUG_OBJECT(v4l2object, "poll error %s", gst_flow_get_name(res));
    return res;
}
dqevent_failed:
{
    GST_DEBUG_OBJECT(v4l2object, "dqevent failed");
    return GST_FLOW_ERROR;
}
}

/**
 * gst_aml_v4l2_object_acquire_format:
 * @v4l2object the object
 * @info a GstVideoInfo to be filled
 *
 * Acquire the driver choosen format. This is useful in decoder or encoder elements where
 * the output format is choosen by the HW.
 *
 * Returns: %TRUE on success, %FALSE on failure.
 */
gboolean
gst_aml_v4l2_object_acquire_format(GstAmlV4l2Object *v4l2object, GstVideoInfo *info)
{
    struct v4l2_fmtdesc *fmtdesc;
    struct v4l2_format fmt;
    struct v4l2_crop crop;
    struct v4l2_selection sel;
    struct v4l2_cropcap cropcap;
    struct v4l2_rect *r = NULL;
    GstVideoFormat format;
    guint width, height;
    GstVideoAlignment align;
    gdouble pixelAspectRatio = 0.0;

    gst_video_info_init(info);
    gst_video_alignment_reset(&align);

    memset(&fmt, 0x00, sizeof(struct v4l2_format));
    fmt.type = v4l2object->type;
    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "fmt.type:%d", fmt.type);
    if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_G_FMT, &fmt) < 0)
        goto get_fmt_failed;

    fmtdesc = gst_aml_v4l2_object_get_format_from_fourcc(v4l2object,
                                                         fmt.fmt.pix.pixelformat);
    if (fmtdesc == NULL)
        goto unsupported_format;

    /* No need to care about mplane, the four first params are the same */
    format = gst_aml_v4l2_object_v4l2fourcc_to_video_format(fmt.fmt.pix.pixelformat);

    /* fails if we do no translate the fmt.pix.pixelformat to GstVideoFormat */
    if (format == GST_VIDEO_FORMAT_UNKNOWN)
        goto unsupported_format;

    if (fmt.fmt.pix.width == 0 || fmt.fmt.pix.height == 0)
        goto invalid_dimensions;

    width = fmt.fmt.pix.width;
    height = fmt.fmt.pix.height;
    /* Use the default compose rectangle */
    memset(&sel, 0, sizeof(struct v4l2_selection));
    sel.type = v4l2object->type;
    sel.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
    if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_G_SELECTION, &sel) >= 0)
    {
        r = &sel.r;
    }
    else
    {
        /* For ancient kernels, fall back to G_CROP */
        memset(&crop, 0, sizeof(struct v4l2_crop));
        crop.type = v4l2object->type;
        if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_G_CROP, &crop) >= 0)
            r = &crop.c;
    }

    if (r)
    {
        GstAmlV4l2VideoDec *self = (GstAmlV4l2VideoDec*) v4l2object->element;

        align.padding_left = r->left;
        align.padding_top = r->top;
        align.padding_right = width - r->width - r->left;
        align.padding_bottom = height - r->height - r->top;
        width = r->width;
        height = r->height;

        if (self->v4l2output->dw_mode >= 0 && self->v4l2output->dw_mode != VDEC_DW_NO_AFBC)
        {
            width = (width/2) *2; // align for dw
            height = (height/2) *2; // align for dw
        }

        if (self->v4l2output->dw_mode == VDEC_DW_AFBC_ONLY)
            height = width = 64; //because driver return src w,h when AFBC_ONLY
    }
    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "final w:%d, h:%d", width, height);

    gst_video_info_set_format(info, format, width, height);

    switch (fmt.fmt.pix.field)
    {
    case V4L2_FIELD_ANY:
    case V4L2_FIELD_NONE:
        info->interlace_mode = GST_VIDEO_INTERLACE_MODE_PROGRESSIVE;
        break;
    case V4L2_FIELD_INTERLACED:
    case V4L2_FIELD_INTERLACED_TB:
    case V4L2_FIELD_INTERLACED_BT:
        info->interlace_mode = GST_VIDEO_INTERLACE_MODE_INTERLEAVED;
        break;
    default:
        goto unsupported_field;
    }

    gst_aml_v4l2_object_get_colorspace(&fmt, &info->colorimetry);

    gst_aml_v4l2_object_save_format(v4l2object, fmtdesc, &fmt, info, &align);

    if (v4l2object->par)
    {
        width = gst_value_get_fraction_numerator(v4l2object->par);
        height = gst_value_get_fraction_denominator(v4l2object->par);
        pixelAspectRatio = (gdouble)width/(gdouble)height;
    }

    if (!v4l2object->par || pixelAspectRatio == 1.0)
    {
        memset(&cropcap, 0, sizeof(cropcap));
        width= height= 1;
        cropcap.type = v4l2object->type;
        if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) >= 0)
        {
            width= cropcap.pixelaspect.denominator;
            height= cropcap.pixelaspect.numerator;
            GST_DEBUG("cropcap: pixel aspect ratio %d:%d",  width, height);
            if ( !width || !height )
            {
               GST_DEBUG("force pixel aspect of 1:1");
               width= height= 1;
            }
        }
    }

    GST_VIDEO_INFO_PAR_N(info) = width;
    GST_VIDEO_INFO_PAR_D(info) = height;

    if (v4l2object->fps)
    {
        GST_VIDEO_INFO_FPS_N(info) = gst_value_get_fraction_numerator(v4l2object->fps);
        GST_VIDEO_INFO_FPS_D(info) = gst_value_get_fraction_denominator(v4l2object->fps);
    }
    /* Shall we setup the pool ? */

    return TRUE;

get_fmt_failed:
{
    GST_ELEMENT_WARNING(v4l2object->element, RESOURCE, SETTINGS,
                        (_("Video device did not provide output format.")), GST_ERROR_SYSTEM);
    return FALSE;
}
invalid_dimensions:
{
    GST_ELEMENT_WARNING(v4l2object->element, RESOURCE, SETTINGS,
                        (_("Video device returned invalid dimensions.")),
                        ("Expected non 0 dimensions, got %dx%d", fmt.fmt.pix.width,
                         fmt.fmt.pix.height));
    return FALSE;
}
unsupported_field:
{
    GST_ELEMENT_ERROR(v4l2object->element, RESOURCE, SETTINGS,
                      (_("Video device uses an unsupported interlacing method.")),
                      ("V4L2 field type %d not supported", fmt.fmt.pix.field));
    return FALSE;
}
unsupported_format:
{
    GST_ELEMENT_ERROR(v4l2object->element, RESOURCE, SETTINGS,
                      (_("Video device uses an unsupported pixel format.")),
                      ("V4L2 format %" GST_FOURCC_FORMAT " not supported",
                       GST_FOURCC_ARGS(fmt.fmt.pix.pixelformat)));
    return FALSE;
}
}

gboolean
gst_aml_v4l2_object_set_crop(GstAmlV4l2Object *obj)
{
    struct v4l2_selection sel = {0};
    struct v4l2_crop crop = {0};

    sel.type = obj->type;
    sel.target = V4L2_SEL_TGT_CROP;
    sel.flags = 0;
    sel.r.left = obj->align.padding_left;
    sel.r.top = obj->align.padding_top;
    sel.r.width = obj->info.width;
    sel.r.height = obj->info.height;

    crop.type = obj->type;
    crop.c = sel.r;

    if (obj->align.padding_left + obj->align.padding_top +
            obj->align.padding_right + obj->align.padding_bottom ==
        0)
    {
        GST_DEBUG_OBJECT(obj->dbg_obj, "no cropping needed");
        return TRUE;
    }

    GST_DEBUG_OBJECT(obj->dbg_obj,
                     "Desired cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
                     crop.c.width, crop.c.height);

    if (obj->ioctl(obj->video_fd, VIDIOC_S_SELECTION, &sel) < 0)
    {
        if (errno != ENOTTY)
        {
            GST_WARNING_OBJECT(obj->dbg_obj,
                               "Failed to set crop rectangle with VIDIOC_S_SELECTION: %s",
                               g_strerror(errno));
            return FALSE;
        }
        else
        {
            if (obj->ioctl(obj->video_fd, VIDIOC_S_CROP, &crop) < 0)
            {
                GST_WARNING_OBJECT(obj->dbg_obj, "VIDIOC_S_CROP failed");
                return FALSE;
            }

            if (obj->ioctl(obj->video_fd, VIDIOC_G_CROP, &crop) < 0)
            {
                GST_WARNING_OBJECT(obj->dbg_obj, "VIDIOC_G_CROP failed");
                return FALSE;
            }

            sel.r = crop.c;
        }
    }

    GST_DEBUG_OBJECT(obj->dbg_obj,
                     "Got cropping left %u, top %u, size %ux%u", crop.c.left, crop.c.top,
                     crop.c.width, crop.c.height);

    return TRUE;
}

gboolean
gst_aml_v4l2_object_caps_equal(GstAmlV4l2Object *v4l2object, GstCaps *caps)
{
    GstStructure *config;
    GstCaps *oldcaps;
    gboolean ret;

    if (!v4l2object->pool)
        return FALSE;

    config = gst_buffer_pool_get_config(v4l2object->pool);
    gst_buffer_pool_config_get_params(config, &oldcaps, NULL, NULL, NULL);

    ret = oldcaps && gst_caps_is_equal(caps, oldcaps);

    gst_structure_free(config);

    return ret;
}

gboolean
gst_aml_v4l2_object_caps_is_subset(GstAmlV4l2Object *v4l2object, GstCaps *caps)
{
    GstStructure *config;
    GstCaps *oldcaps;
    gboolean ret;

    if (!v4l2object->pool)
        return FALSE;

    config = gst_buffer_pool_get_config(v4l2object->pool);
    gst_buffer_pool_config_get_params(config, &oldcaps, NULL, NULL, NULL);

    ret = oldcaps && gst_caps_is_subset(oldcaps, caps);

    gst_structure_free(config);

    return ret;
}

GstCaps *
gst_aml_v4l2_object_get_current_caps(GstAmlV4l2Object *v4l2object)
{
    GstStructure *config;
    GstCaps *oldcaps;

    if (!v4l2object->pool)
        return NULL;

    config = gst_buffer_pool_get_config(v4l2object->pool);
    gst_buffer_pool_config_get_params(config, &oldcaps, NULL, NULL, NULL);

    if (oldcaps)
        gst_caps_ref(oldcaps);

    gst_structure_free(config);

    return oldcaps;
}

gboolean
gst_aml_v4l2_object_unlock(GstAmlV4l2Object *v4l2object)
{
    gboolean ret = TRUE;

    GST_LOG_OBJECT(v4l2object->dbg_obj, "start flushing");

    gst_poll_set_flushing(v4l2object->poll, TRUE);

    if (v4l2object->pool && gst_buffer_pool_is_active(v4l2object->pool))
        gst_buffer_pool_set_flushing(v4l2object->pool, TRUE);

    return ret;
}

gboolean
gst_aml_v4l2_object_unlock_stop(GstAmlV4l2Object *v4l2object)
{
    gboolean ret = TRUE;

    GST_LOG_OBJECT(v4l2object->dbg_obj, "stop flushing");

    if (v4l2object->pool && gst_buffer_pool_is_active(v4l2object->pool))
        gst_buffer_pool_set_flushing(v4l2object->pool, FALSE);

    gst_poll_set_flushing(v4l2object->poll, FALSE);

    return ret;
}

gboolean
gst_aml_v4l2_object_stop(GstAmlV4l2Object *v4l2object)
{
    GstAmlV4l2BufferPool *bpool = GST_AML_V4L2_BUFFER_POOL(v4l2object->pool);

    GST_DEBUG_OBJECT(v4l2object->dbg_obj, "stopping");

    if (!GST_AML_V4L2_IS_OPEN(v4l2object))
        goto done;
    if (!GST_AML_V4L2_IS_ACTIVE(v4l2object))
        goto done;

    if (bpool && bpool->other_pool) /* jxsdbg for resolution switch */
    {
        if (v4l2object->old_other_pool)
        {
            /* this case indicate 1st switch did not wait all old pool buf recycle and 2nd switch is coming.
               so save 1st old pool  */
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "switching occurs during last switching buf recycle flow");
            v4l2object->old_old_other_pool = v4l2object->old_other_pool;
        }

        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "switching flow, ref old drmbufferpool");
        v4l2object->old_other_pool = bpool->other_pool;
        gst_object_ref(v4l2object->old_other_pool);
    }

    if (v4l2object->pool)
    {
        if (!gst_aml_v4l2_buffer_pool_orphan(&v4l2object->pool))
        {
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "deactivating pool");
            gst_buffer_pool_set_active(v4l2object->pool, FALSE);
            gst_object_unref(v4l2object->pool);
        }
        v4l2object->pool = NULL;
    }

    GST_AML_V4L2_SET_INACTIVE(v4l2object);

done:
    return TRUE;
}

GstCaps *
gst_aml_v4l2_object_probe_caps(GstAmlV4l2Object *v4l2object, GstCaps *filter)
{
    GstCaps *ret;
    GSList *walk;
    GSList *formats;

    GST_INFO_OBJECT(v4l2object->dbg_obj, "filter caps: %" GST_PTR_FORMAT, filter);
    formats = gst_aml_v4l2_object_get_format_list(v4l2object);

    ret = gst_caps_new_empty();

// At this time, decoder will return defult aspect, and it is not usful.
// so, do not probe cropcap at this time and do this action after decoding.
#if 0
    if (v4l2object->keep_aspect && !v4l2object->par)
    {
        struct v4l2_cropcap cropcap;

        memset(&cropcap, 0, sizeof(cropcap));

        cropcap.type = v4l2object->type;
        if (v4l2object->ioctl(v4l2object->video_fd, VIDIOC_CROPCAP, &cropcap) < 0)
        {
            if (errno != ENOTTY)
                GST_WARNING_OBJECT(v4l2object->dbg_obj,
                                   "Failed to probe pixel aspect ratio with VIDIOC_CROPCAP: %s",
                                   g_strerror(errno));
        }
        else if (cropcap.pixelaspect.numerator && cropcap.pixelaspect.denominator)
        {
            v4l2object->par = g_new0(GValue, 1);
            g_value_init(v4l2object->par, GST_TYPE_FRACTION);
            gst_value_set_fraction(v4l2object->par, cropcap.pixelaspect.numerator,
                                   cropcap.pixelaspect.denominator);
        }
    }
#endif

    for (walk = formats; walk; walk = walk->next)
    {
        struct v4l2_fmtdesc *format;
        GstStructure *template;
        GstCaps *tmp, *tmp2;

        format = (struct v4l2_fmtdesc *)walk->data;

        template = gst_aml_v4l2_object_v4l2fourcc_to_bare_struct(format->pixelformat);

        if (!template)
        {
            GST_DEBUG_OBJECT(v4l2object->dbg_obj,
                             "unknown format %" GST_FOURCC_FORMAT,
                             GST_FOURCC_ARGS(format->pixelformat));
            continue;
        }

        /* If we have a filter, check if we need to probe this format or not */
        if (filter)
        {
            GstCaps *format_caps = gst_caps_new_empty();

            gst_caps_append_structure(format_caps, gst_structure_copy(template));
            GST_INFO_OBJECT(v4l2object->dbg_obj, "format_caps: %" GST_PTR_FORMAT, format_caps);

            if (!gst_caps_can_intersect(format_caps, filter))
            {
                gst_caps_unref(format_caps);
                gst_structure_free(template);
                continue;
            }

            gst_caps_unref(format_caps);
        }

        tmp = gst_aml_v4l2_object_probe_caps_for_format(v4l2object,
                                                        format->pixelformat, template);
        GST_INFO_OBJECT(v4l2object->dbg_obj, "tmp caps: %" GST_PTR_FORMAT, tmp);

        if (tmp)
        {
            tmp2 = gst_caps_copy(tmp);
            gst_caps_set_features_simple(tmp2, gst_caps_features_from_string(GST_CAPS_FEATURE_MEMORY_DMABUF));
            gst_caps_append(ret, tmp);
            gst_caps_append(ret, tmp2);
        }

        gst_structure_free(template);
    }

    if (filter)
    {
        GstCaps *tmp;

        tmp = ret;
        ret = gst_caps_intersect_full(filter, ret, GST_CAPS_INTERSECT_FIRST);
        gst_caps_unref(tmp);
    }

    if (v4l2object->stream_mode)
    {
        GST_INFO_OBJECT(v4l2object->dbg_obj, "ret caps: %" GST_PTR_FORMAT, ret);
        for (guint i = 0; i < gst_caps_get_size(ret); i++)
        {
            GstStructure *s = gst_caps_get_structure(ret, i);
            if (s)
                gst_structure_remove_field(s, "alignment");

            GST_DEBUG("i:%d, s:%p", i, s);
        }
        GST_INFO_OBJECT(v4l2object->dbg_obj, "new ret caps: %" GST_PTR_FORMAT, ret);
    }

    GST_INFO_OBJECT(v4l2object->dbg_obj, "probed caps: %" GST_PTR_FORMAT, ret);

    return ret;
}

GstCaps *
gst_aml_v4l2_object_get_caps(GstAmlV4l2Object *v4l2object, GstCaps *filter)
{
    GstCaps *ret;

    if (v4l2object->probed_caps == NULL)
        v4l2object->probed_caps = gst_aml_v4l2_object_probe_caps(v4l2object, NULL);

    if (filter)
    {
        ret = gst_caps_intersect_full(filter, v4l2object->probed_caps,
                                      GST_CAPS_INTERSECT_FIRST);
    }
    else
    {
        ret = gst_caps_ref(v4l2object->probed_caps);
    }

    return ret;
}

gboolean
gst_aml_v4l2_object_decide_allocation(GstAmlV4l2Object *obj, GstQuery *query)
{
    GstCaps *caps;
    GstBufferPool *pool = NULL, *other_pool = NULL;
    GstStructure *config;
    guint size, min, max, own_min = 0;
    gboolean update;
    gboolean has_video_meta;
    gboolean can_share_own_pool, pushing_from_our_pool = FALSE;
    GstAllocator *allocator = NULL;
    GstAllocationParams params = {0};

    GST_DEBUG_OBJECT(obj->dbg_obj, "decide allocation");

    g_return_val_if_fail(obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
                             obj->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
                         FALSE);

    gst_query_parse_allocation(query, &caps, NULL);

    if (obj->pool == NULL)
    {
        if (!gst_aml_v4l2_object_setup_pool(obj, caps))
            goto pool_failed;
    }

    if (gst_query_get_n_allocation_params(query) > 0)
        gst_query_parse_nth_allocation_param(query, 0, &allocator, &params);

    if (gst_query_get_n_allocation_pools(query) > 0)
    {
        gst_query_parse_nth_allocation_pool(query, 0, &pool, &size, &min, &max);
        update = TRUE;
    }
    else
    {
        pool = NULL;
        min = max = 0;
        size = 0;
        update = FALSE;
    }

    GST_DEBUG_OBJECT(obj->dbg_obj, "allocation: size:%u min:%u max:%u pool:%" GST_PTR_FORMAT, size, min, max, pool);

    has_video_meta =
        gst_query_find_allocation_meta(query, GST_VIDEO_META_API_TYPE, NULL);

    can_share_own_pool = (has_video_meta || !obj->need_video_meta);

    gst_aml_v4l2_get_driver_min_buffers(obj);
    /* We can't share our own pool, if it exceed V4L2 capacity */
    if (min + obj->min_buffers + 1 > VIDEO_MAX_FRAME)
        can_share_own_pool = FALSE;

    /* select a pool */
    switch (obj->mode)
    {
    case GST_V4L2_IO_RW:
        if (pool)
        {
            /* in READ/WRITE mode, prefer a downstream pool because our own pool
             * doesn't help much, we have to write to it as well */
            GST_DEBUG_OBJECT(obj->dbg_obj,
                             "read/write mode: using downstream pool");
            /* use the bigest size, when we use our own pool we can't really do any
             * other size than what the hardware gives us but for downstream pools
             * we can try */
            size = MAX(size, obj->info.size);
        }
        else if (can_share_own_pool)
        {
            /* no downstream pool, use our own then */
            GST_DEBUG_OBJECT(obj->dbg_obj,
                             "read/write mode: no downstream pool, using our own");
            pool = gst_object_ref(obj->pool);
            size = obj->info.size;
            pushing_from_our_pool = TRUE;
        }
        break;

    case GST_V4L2_IO_USERPTR:
    case GST_V4L2_IO_DMABUF_IMPORT:
        /* in importing mode, prefer our own pool, and pass the other pool to
         * our own, so it can serve itself */
        if (pool == NULL)
            goto no_downstream_pool;
        gst_aml_v4l2_buffer_pool_set_other_pool(GST_AML_V4L2_BUFFER_POOL(obj->pool), pool);
        other_pool = pool;
        gst_object_unref(pool);
        pool = gst_object_ref(obj->pool);
        size = obj->info.size;
        break;

    case GST_V4L2_IO_MMAP:
    case GST_V4L2_IO_DMABUF:
        /* in streaming mode, prefer our own pool */
        /* Check if we can use it ... */
        if (can_share_own_pool)
        {
            if (pool)
                gst_object_unref(pool);
            pool = gst_object_ref(obj->pool);
            size = obj->info.size;
            GST_DEBUG_OBJECT(obj->dbg_obj,
                             "streaming mode: using our own pool %" GST_PTR_FORMAT, pool);
            pushing_from_our_pool = TRUE;
        }
        else if (pool)
        {
            GST_DEBUG_OBJECT(obj->dbg_obj,
                             "streaming mode: copying to downstream pool %" GST_PTR_FORMAT,
                             pool);
        }
        else
        {
            GST_DEBUG_OBJECT(obj->dbg_obj,
                             "streaming mode: no usable pool, copying to generic pool");
            size = MAX(size, obj->info.size);
        }
        break;
    case GST_V4L2_IO_AUTO:
    default:
        GST_WARNING_OBJECT(obj->dbg_obj, "unhandled mode");
        break;
    }

    if (size == 0)
        goto no_size;

    /* If pushing from our own pool, configure it with queried minimum,
     * otherwise use the minimum required */
    if (pushing_from_our_pool)
    {
        /* When pushing from our own pool, we need what downstream one, to be able
         * to fill the pipeline, the minimum required to decoder according to the
         * driver and 2 more, so we don't endup up with everything downstream or
         * held by the decoder. We account 2 buffers for v4l2 so when one is being
         * pushed downstream the other one can already be queued for the next
         * frame. */
        own_min = min + obj->min_buffers + 2;

        /* If no allocation parameters where provided, allow for a little more
         * buffers and enable copy threshold */
        if (!update)
        {
            own_min += 2;
            gst_aml_v4l2_buffer_pool_copy_at_threshold(GST_AML_V4L2_BUFFER_POOL(pool),
                                                       TRUE);
        }
        else
        {
            gst_aml_v4l2_buffer_pool_copy_at_threshold(GST_AML_V4L2_BUFFER_POOL(pool),
                                                       FALSE);
        }
    }
    else
    {
        min = obj->min_buffers;
        max = min;
    }

    /* Request a bigger max, if one was suggested but it's too small */
    if (max != 0)
        max = MAX(min, max);

    /* First step, configure our own pool */
    config = gst_buffer_pool_get_config(obj->pool);

    if (obj->need_video_meta || has_video_meta)
    {
        GST_DEBUG_OBJECT(obj->dbg_obj, "activate Video Meta");
        gst_buffer_pool_config_add_option(config,
                                          GST_BUFFER_POOL_OPTION_VIDEO_META);
    }

    gst_buffer_pool_config_set_allocator(config, allocator, &params);
    gst_buffer_pool_config_set_params(config, caps, size, min, max);

    GST_DEBUG_OBJECT(obj->dbg_obj, "setting own pool config to %" GST_PTR_FORMAT, config);

    /* Our pool often need to adjust the value */
    if (!gst_buffer_pool_set_config(obj->pool, config))
    {
        config = gst_buffer_pool_get_config(obj->pool);

        GST_DEBUG_OBJECT(obj->dbg_obj, "own pool config changed to %" GST_PTR_FORMAT, config);

        /* our pool will adjust the maximum buffer, which we are fine with */
        if (!gst_buffer_pool_set_config(obj->pool, config))
            goto config_failed;
    }

    /* Now configure the other pool if different */
    if (obj->pool != pool)
        other_pool = pool;

    if (other_pool)
    {
        GstAmlV4l2VideoDec *self = (GstAmlV4l2VideoDec *)obj->element;
        guint other_min = min;
        guint other_max = max;

        if (obj->old_other_pool || obj->old_old_other_pool) //jxsdbg for switching
        {
            obj->outstanding_buf_num = gst_aml_v4l2_object_get_outstanding_capture_buf_num(obj);
            other_min = min - obj->outstanding_buf_num;
            other_max = max - obj->outstanding_buf_num;
            GST_DEBUG_OBJECT(obj, "oop:%p, ooop:%p, outstanding buf num:%d, set min, max to %d,%d",
                             obj->old_other_pool, obj->old_old_other_pool,
                             obj->outstanding_buf_num, other_min, other_max);
        }

        if (self->is_secure_path)
        {
            params.flags |= GST_MEMORY_FLAG_LAST << 1; // in drmallocator GST_MEMORY_FLAG_LAST << 1 represent GST_MEMORY_FLAG_SECURE
            GST_DEBUG_OBJECT(obj, "set secure flag for drmbufferpool flag:0x%x", params.flags);
        }
        config = gst_buffer_pool_get_config(other_pool);
        gst_buffer_pool_config_set_allocator(config, allocator, &params);
        gst_buffer_pool_config_set_params (config, caps, size, other_min, other_max);
        gst_buffer_pool_config_set_video_alignment(config, &obj->align);

        GST_DEBUG_OBJECT(obj->dbg_obj, "setting other pool config to %" GST_PTR_FORMAT, config);

        /* if downstream supports video metadata, add this to the pool config */
        if (has_video_meta)
        {
            GST_DEBUG_OBJECT(obj->dbg_obj, "activate Video Meta");
            gst_buffer_pool_config_add_option(config,
                                              GST_BUFFER_POOL_OPTION_VIDEO_META);
        }

        if (!gst_buffer_pool_set_config(other_pool, config))
        {
            config = gst_buffer_pool_get_config(other_pool);

            if (!gst_buffer_pool_config_validate_params(config, caps, size, min,
                                                        max))
            {
                gst_structure_free(config);
                goto config_failed;
            }

            if (!gst_buffer_pool_set_config(other_pool, config))
                goto config_failed;
        }
    }

    if (pool)
    {
        /* For simplicity, simply read back the active configuration, so our base
         * class get the right information */
        config = gst_buffer_pool_get_config(pool);
        gst_buffer_pool_config_get_params(config, NULL, &size, &min, &max);
        gst_structure_free(config);
    }

    if (update)
        gst_query_set_nth_allocation_pool(query, 0, pool, size, min, max);
    else
        gst_query_add_allocation_pool(query, pool, size, min, max);

    if (allocator)
        gst_object_unref(allocator);

    if (pool)
        gst_object_unref(pool);

    return TRUE;

pool_failed:
{
    /* setup_pool already send the error */
    goto cleanup;
}
config_failed:
{
    GST_ELEMENT_ERROR(obj->element, RESOURCE, SETTINGS,
                      (_("Failed to configure internal buffer pool.")), (NULL));
    goto cleanup;
}
no_size:
{
    GST_ELEMENT_ERROR(obj->element, RESOURCE, SETTINGS,
                      (_("Video device did not suggest any buffer size.")), (NULL));
    goto cleanup;
}
cleanup:
{
    if (allocator)
        gst_object_unref(allocator);

    if (pool)
        gst_object_unref(pool);
    return FALSE;
}
no_downstream_pool:
{
    GST_ELEMENT_ERROR(obj->element, RESOURCE, SETTINGS,
                      (_("No downstream pool to import from.")),
                      ("When importing DMABUF or USERPTR, we need a pool to import from"));
    return FALSE;
}
}

gboolean
gst_aml_v4l2_object_propose_allocation(GstAmlV4l2Object *obj, GstQuery *query)
{
    GstBufferPool *pool;
    /* we need at least 2 buffers to operate */
    guint size, min, max;
    GstCaps *caps;
    gboolean need_pool;

    /* Set defaults allocation parameters */
    size = obj->info.size;
    min = GST_AML_V4L2_MIN_BUFFERS;
    max = VIDEO_MAX_FRAME;

    gst_query_parse_allocation(query, &caps, &need_pool);

    if (caps == NULL)
        goto no_caps;

    switch (obj->mode)
    {
    case GST_V4L2_IO_MMAP:
    case GST_V4L2_IO_DMABUF:
        if ((pool = obj->pool))
            gst_object_ref(pool);
        break;
    default:
        pool = NULL;
        break;
    }

    if (pool != NULL)
    {
        GstCaps *pcaps;
        GstStructure *config;

        /* we had a pool, check caps */
        config = gst_buffer_pool_get_config(pool);
        gst_buffer_pool_config_get_params(config, &pcaps, NULL, NULL, NULL);

        GST_DEBUG_OBJECT(obj->dbg_obj,
                         "we had a pool with caps %" GST_PTR_FORMAT, pcaps);
        if (!gst_caps_is_equal(caps, pcaps))
        {
            gst_structure_free(config);
            gst_object_unref(pool);
            goto different_caps;
        }
        gst_structure_free(config);
    }
    gst_aml_v4l2_get_driver_min_buffers(obj);

    min = MAX(obj->min_buffers, GST_AML_V4L2_MIN_BUFFERS);

    gst_query_add_allocation_pool(query, pool, size, min, max);

    /* we also support various metadata */
    gst_query_add_allocation_meta(query, GST_VIDEO_META_API_TYPE, NULL);

    if (pool)
        gst_object_unref(pool);

    return TRUE;

    /* ERRORS */
no_caps:
{
    GST_DEBUG_OBJECT(obj->dbg_obj, "no caps specified");
    return FALSE;
}
different_caps:
{
    /* different caps, we can't use this pool */
    GST_DEBUG_OBJECT(obj->dbg_obj, "pool has different caps");
    return FALSE;
}
}

gboolean
gst_aml_v4l2_object_try_import(GstAmlV4l2Object *obj, GstBuffer *buffer)
{
    GstVideoMeta *vmeta;
    guint n_mem = gst_buffer_n_memory(buffer);

    /* only import if requested */
    switch (obj->mode)
    {
    case GST_V4L2_IO_USERPTR:
    case GST_V4L2_IO_DMABUF_IMPORT:
        break;
    default:
        GST_DEBUG_OBJECT(obj->dbg_obj,
                         "The io-mode does not enable importation");
        return FALSE;
    }

    vmeta = gst_buffer_get_video_meta(buffer);
    if (!vmeta && obj->need_video_meta)
    {
        GST_DEBUG_OBJECT(obj->dbg_obj, "Downstream buffer uses standard "
                                       "stride/offset while the driver does not.");
        return FALSE;
    }

    /* we need matching strides/offsets and size */
    if (vmeta)
    {
        guint p;
        gboolean need_fmt_update = FALSE;

        if (vmeta->n_planes != GST_VIDEO_INFO_N_PLANES(&obj->info))
        {
            GST_WARNING_OBJECT(obj->dbg_obj,
                               "Cannot import buffers with different number planes");
            return FALSE;
        }

        for (p = 0; p < vmeta->n_planes; p++)
        {
            if (vmeta->stride[p] < obj->info.stride[p])
            {
                GST_DEBUG_OBJECT(obj->dbg_obj,
                                 "Not importing as remote stride %i is smaller then %i on plane %u",
                                 vmeta->stride[p], obj->info.stride[p], p);
                return FALSE;
            }
            else if (vmeta->stride[p] > obj->info.stride[p])
            {
                need_fmt_update = TRUE;
            }

            if (vmeta->offset[p] < obj->info.offset[p])
            {
                GST_DEBUG_OBJECT(obj->dbg_obj,
                                 "Not importing as offset %" G_GSIZE_FORMAT
                                 " is smaller then %" G_GSIZE_FORMAT " on plane %u",
                                 vmeta->offset[p], obj->info.offset[p], p);
                return FALSE;
            }
            else if (vmeta->offset[p] > obj->info.offset[p])
            {
                need_fmt_update = TRUE;
            }
        }

        if (need_fmt_update)
        {
            struct v4l2_format format;
            gint wanted_stride[GST_VIDEO_MAX_PLANES] = {
                0,
            };

            format = obj->format;

            /* update the current format with the stride we want to import from */
            if (V4L2_TYPE_IS_MULTIPLANAR(obj->type))
            {
                guint i;

                GST_DEBUG_OBJECT(obj->dbg_obj, "Wanted strides:");

                for (i = 0; i < obj->n_v4l2_planes; i++)
                {
                    gint stride = vmeta->stride[i];

                    if (GST_VIDEO_FORMAT_INFO_IS_TILED(obj->info.finfo))
                        stride = GST_VIDEO_TILE_X_TILES(stride) << GST_VIDEO_FORMAT_INFO_TILE_WS(obj->info.finfo);

                    format.fmt.pix_mp.plane_fmt[i].bytesperline = stride;
                    wanted_stride[i] = stride;
                    GST_DEBUG_OBJECT(obj->dbg_obj, "    [%u] %i", i, wanted_stride[i]);
                }
            }
            else
            {
                gint stride = vmeta->stride[0];

                GST_DEBUG_OBJECT(obj->dbg_obj, "Wanted stride: %i", stride);

                if (GST_VIDEO_FORMAT_INFO_IS_TILED(obj->info.finfo))
                    stride = GST_VIDEO_TILE_X_TILES(stride) << GST_VIDEO_FORMAT_INFO_TILE_WS(obj->info.finfo);

                format.fmt.pix.bytesperline = stride;
                wanted_stride[0] = stride;
            }

            if (obj->ioctl(obj->video_fd, VIDIOC_S_FMT, &format) < 0)
            {
                GST_WARNING_OBJECT(obj->dbg_obj,
                                   "Something went wrong trying to update current format: %s",
                                   g_strerror(errno));
                return FALSE;
            }

            gst_aml_v4l2_object_save_format(obj, obj->fmtdesc, &format, &obj->info,
                                            &obj->align);

            if (V4L2_TYPE_IS_MULTIPLANAR(obj->type))
            {
                guint i;

                for (i = 0; i < obj->n_v4l2_planes; i++)
                {
                    if (format.fmt.pix_mp.plane_fmt[i].bytesperline != wanted_stride[i])
                    {
                        GST_DEBUG_OBJECT(obj->dbg_obj,
                                         "[%i] Driver did not accept the new stride (wants %i, got %i)",
                                         i, format.fmt.pix_mp.plane_fmt[i].bytesperline,
                                         wanted_stride[i]);
                        return FALSE;
                    }
                }
            }
            else
            {
                if (format.fmt.pix.bytesperline != wanted_stride[0])
                {
                    GST_DEBUG_OBJECT(obj->dbg_obj,
                                     "Driver did not accept the new stride (wants %i, got %i)",
                                     format.fmt.pix.bytesperline, wanted_stride[0]);
                    return FALSE;
                }
            }
        }
    }

    /* we can always import single memory buffer, but otherwise we need the same
     * amount of memory object. */
    if (n_mem != 1 && n_mem != obj->n_v4l2_planes)
    {
        GST_DEBUG_OBJECT(obj->dbg_obj, "Can only import %i memory, "
                                       "buffers contains %u memory",
                         obj->n_v4l2_planes, n_mem);
        return FALSE;
    }

    /* For DMABuf importation we need DMABuf of course */
    if (obj->mode == GST_V4L2_IO_DMABUF_IMPORT)
    {
        guint i;

        for (i = 0; i < n_mem; i++)
        {
            GstMemory *mem = gst_buffer_peek_memory(buffer, i);

            if (!gst_is_dmabuf_memory(mem))
            {
                GST_DEBUG_OBJECT(obj->dbg_obj, "Cannot import non-DMABuf memory.");
                return FALSE;
            }
        }
    }

    /* for the remaining, only the kernel driver can tell */
    return TRUE;
}

static gboolean gst_aml_v4l2_set_control(GstAmlV4l2Object *v4l2object, guint ctl)
{
    int rc;
    struct v4l2_queryctrl queryctrl;
    struct v4l2_control control;

    GstAmlV4l2VideoDec *self = (GstAmlV4l2VideoDec *)v4l2object->element;
    self->is_secure_path = TRUE;

    memset(&queryctrl, 0, sizeof(queryctrl));
    queryctrl.id = ctl;

    rc = v4l2object->ioctl(v4l2object->video_fd, VIDIOC_QUERYCTRL, &queryctrl);
    if (rc == 0)
    {
        if (!(queryctrl.flags & V4L2_CTRL_FLAG_DISABLED))
        {
            memset(&control, 0, sizeof(control));
            control.id = ctl;
            control.value = 1;
            rc = v4l2object->ioctl(v4l2object->video_fd, VIDIOC_S_CTRL, &control);
            if (rc != 0)
            {
                GST_ERROR_OBJECT(v4l2object->dbg_obj, "set ctl:0x%x fail rc %d", ctl, rc);
                return FALSE;
            }
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "set ctl:0x%x succ", ctl);
            return TRUE;
        }
        else
        {
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "ctl:0x%x is disabled", ctl);
            return TRUE;
        }
    }
    else
    {
        GST_ERROR_OBJECT(v4l2object->dbg_obj, "VIDIOC_QUERYCTRL for 0x:%x fail", ctl);
        return FALSE;
    }
}

gboolean gst_aml_v4l2_set_I_frame_mode(GstAmlV4l2Object *v4l2object)
{
    if (v4l2object->iframe_mode)
    {
        int rc;
        struct v4l2_control control;
        memset(&control, 0, sizeof(control));
        control.id = AML_V4L2_SET_I_FRAME;
        control.value = 1;
        rc = v4l2object->ioctl(v4l2object->video_fd, VIDIOC_S_CTRL, &control);
        if (rc != 0)
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "rc: %d", rc);
            return FALSE;
        }
    }
    GST_DEBUG("set I frame ok");
    return TRUE;
}

gboolean gst_aml_v4l2_set_drm_mode(GstAmlV4l2Object *v4l2object)
{
    /* On AmLogic, output obj use of GST_V4L2_IO_DMABUF_IMPORT implies secure memory */
    if (v4l2object->req_mode == GST_V4L2_IO_DMABUF_IMPORT)
    {

        if (gst_aml_v4l2_set_control(v4l2object, AML_V4L2_SET_DRMMODE))
        {
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "AML_V4L2_SET_DRMMODE set succ");
            return TRUE;
        }
        else
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "AML_V4L2_SET_DRMMODE set fail");
            return FALSE;
        }
    }
    else
    {
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "req mode is not GST_V4L2_IO_DMABUF_IMPORT, DRM mode does not need to be configured");
        return TRUE;
    }
}

gboolean gst_aml_v4l2_set_stream_mode(GstAmlV4l2Object *v4l2object)
{
    if (v4l2object->stream_mode)
    {
        if (gst_aml_v4l2_set_control(v4l2object, AML_V4L2_SET_STREAM_MODE))
        {
            GST_DEBUG_OBJECT(v4l2object->dbg_obj, "AML_V4L2_SET_STREAM_MODE set succ");
            return TRUE;
        }
        else
        {
            GST_ERROR_OBJECT(v4l2object->dbg_obj, "AML_V4L2_SET_STREAM_MODE set fail");
            return FALSE;
        }
    }
    else
    {
        GST_DEBUG_OBJECT(v4l2object->dbg_obj, "req mode is not stream mode, frame mode in configured by default");
        return TRUE;
    }
}

gint gst_aml_v4l2_object_get_outstanding_capture_buf_num(GstAmlV4l2Object *obj)
{
    gint ret = 0;
    gint count = 0;

    if (obj->old_other_pool)
    {
        count = gst_buffer_pool_get_outstanding_num(obj->old_other_pool);
        if (count)
        {
            ret += count;
        }
        else
        {
            gst_object_unref(obj->old_other_pool);
            obj->old_other_pool = NULL;
        }
    }

    count = 0;
    if (obj->old_old_other_pool)
    {
        count = gst_buffer_pool_get_outstanding_num(obj->old_old_other_pool);
        if (count)
        {
            ret += count;
        }
        else
        {
            gst_object_unref(obj->old_old_other_pool);
            obj->old_old_other_pool = NULL;
        }
    }

    return ret;
}