commit 0adb3b5ec4c5107aa164497e0356e854d78dc8a3
author Song Zhao <song.zhao@amlogic.com> Mon Jul 27 16:15:04 2020 -0700
committer Song Zhao <song.zhao@amlogic.com> Mon Jul 27 16:16:31 2020 -0700
tree f1f8214759cb0cc91dc4dccf1a43532ce19943fe
parent a5f81d158baa375285497f1877109067ad2f9f00

avsync-lib: disable sync threshold in kernel

It will avoid VIDEO_START to touch the PCR clock, or there will be a
sudden clock jump.

Change-Id: I6fa93b68512c41f0a1839dd220eeac53de0e32e6

avsync-lib/src/avsync.c

diff --git a/avsync-lib/src/avsync.c b/avsync-lib/src/avsync.c
index f83590a..dda289f 100644
--- a/avsync-lib/src/avsync.c
+++ b/avsync-lib/src/avsync.c
@@ -268,6 +268,8 @@
                 log_error("set pcrmaster mode fail");
         }
 
+        /* video start ASAP */
+        tsync_set_video_sync_thres(avsync->session_id, false);
         /* video start event */
         if (tsync_send_video_start(avsync->session_id, frame->pts))
             log_error("send video start fail");

avsync-lib/src/tsync.c

diff --git a/avsync-lib/src/tsync.c b/avsync-lib/src/tsync.c
index 4e509d8..b17d7b8 100644
--- a/avsync-lib/src/tsync.c
+++ b/avsync-lib/src/tsync.c
@@ -27,6 +27,7 @@
 #define TSYNC_MODE   "/sys/class/tsync/mode"
 
 #define _A_M 'S'
+#define AMSTREAM_IOC_SYNCTHRESH _IOW((_A_M), 0x19, int)
 #define AMSTREAM_IOC_SET_VSYNC_UPINT _IOW((_A_M), 0x89, int)
 #define AMSTREAM_IOC_SET_VIDEOPEEK   _IOW(_A_M, 0xbf, unsigned int)
 
@@ -154,6 +155,11 @@
     return video_device_ioctl(AMSTREAM_IOC_SET_VSYNC_UPINT, enable);
 }
 
+int tsync_set_video_sync_thres(int session, bool enable)
+{
+    return video_device_ioctl(AMSTREAM_IOC_SYNCTHRESH, enable);
+}
+
 int tsync_set_mode(int session, enum sync_mode mode)
 {
     const char* val = NULL;

avsync-lib/src/tsync.h

diff --git a/avsync-lib/src/tsync.h b/avsync-lib/src/tsync.h
index 52bd953..7d97269 100644
--- a/avsync-lib/src/tsync.h
+++ b/avsync-lib/src/tsync.h
@@ -25,5 +25,6 @@
 int tsync_set_pts_inc_mode(int session, bool enable);
 int tsync_set_mode(int session, enum sync_mode mode);
 int tsync_set_video_peek_mode(int session);
+int tsync_set_video_sync_thres(int session, bool enable);
 
 #endif