| /* |
| * libmad - MPEG audio decoder library |
| * Copyright (C) 2000-2004 Underbit Technologies, Inc. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| * If you would like to negotiate alternate licensing terms, you may do |
| * so by contacting: Underbit Technologies, Inc. <info@underbit.com> |
| */ |
| |
| # ifdef __cplusplus |
| extern "C" { |
| # endif |
| |
| # define FPM_INTEL |
| |
| |
| |
| # define SIZEOF_INT 4 |
| # define SIZEOF_LONG 4 |
| # define SIZEOF_LONG_LONG 8 |
| |
| |
| /* Id: version.h,v 1.26 2004/01/23 09:41:33 rob Exp */ |
| |
| # ifndef LIBMAD_VERSION_H |
| # define LIBMAD_VERSION_H |
| |
| # define MAD_VERSION_MAJOR 0 |
| # define MAD_VERSION_MINOR 15 |
| # define MAD_VERSION_PATCH 1 |
| # define MAD_VERSION_EXTRA " (beta)" |
| |
| # define MAD_VERSION_STRINGIZE(str) #str |
| # define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num) |
| |
| # define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \ |
| MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \ |
| MAD_VERSION_STRING(MAD_VERSION_PATCH) \ |
| MAD_VERSION_EXTRA |
| |
| # define MAD_PUBLISHYEAR "2000-2004" |
| # define MAD_AUTHOR "Underbit Technologies, Inc." |
| # define MAD_EMAIL "info@underbit.com" |
| |
| extern char const mad_version[]; |
| extern char const mad_copyright[]; |
| extern char const mad_author[]; |
| extern char const mad_build[]; |
| |
| # endif |
| |
| /* Id: fixed.h,v 1.38 2004/02/17 02:02:03 rob Exp */ |
| |
| # ifndef LIBMAD_FIXED_H |
| # define LIBMAD_FIXED_H |
| |
| # if SIZEOF_INT >= 4 |
| typedef signed int mad_fixed_t; |
| |
| typedef signed int mad_fixed64hi_t; |
| typedef unsigned int mad_fixed64lo_t; |
| # else |
| typedef signed long mad_fixed_t; |
| |
| typedef signed long mad_fixed64hi_t; |
| typedef unsigned long mad_fixed64lo_t; |
| # endif |
| |
| # if defined(_MSC_VER) |
| # define mad_fixed64_t signed __int64 |
| # elif 1 || defined(__GNUC__) |
| # define mad_fixed64_t signed long long |
| # endif |
| |
| # if defined(FPM_FLOAT) |
| typedef double mad_sample_t; |
| # else |
| typedef mad_fixed_t mad_sample_t; |
| # endif |
| |
| /* |
| * Fixed-point format: 0xABBBBBBB |
| * A == whole part (sign + 3 bits) |
| * B == fractional part (28 bits) |
| * |
| * Values are signed two's complement, so the effective range is: |
| * 0x80000000 to 0x7fffffff |
| * -8.0 to +7.9999999962747097015380859375 |
| * |
| * The smallest representable value is: |
| * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9) |
| * |
| * 28 bits of fractional accuracy represent about |
| * 8.6 digits of decimal accuracy. |
| * |
| * Fixed-point numbers can be added or subtracted as normal |
| * integers, but multiplication requires shifting the 64-bit result |
| * from 56 fractional bits back to 28 (and rounding.) |
| * |
| * Changing the definition of MAD_F_FRACBITS is only partially |
| * supported, and must be done with care. |
| */ |
| |
| # define MAD_F_FRACBITS 28 |
| |
| # if MAD_F_FRACBITS == 28 |
| # define MAD_F(x) ((mad_fixed_t) (x##L)) |
| # else |
| # if MAD_F_FRACBITS < 28 |
| # warning "MAD_F_FRACBITS < 28" |
| # define MAD_F(x) ((mad_fixed_t) \ |
| (((x##L) + \ |
| (1L << (28 - MAD_F_FRACBITS - 1))) >> \ |
| (28 - MAD_F_FRACBITS))) |
| # elif MAD_F_FRACBITS > 28 |
| # error "MAD_F_FRACBITS > 28 not currently supported" |
| # define MAD_F(x) ((mad_fixed_t) \ |
| ((x##L) << (MAD_F_FRACBITS - 28))) |
| # endif |
| # endif |
| |
| # define MAD_F_MIN ((mad_fixed_t) -0x80000000L) |
| # define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL) |
| |
| # define MAD_F_ONE MAD_F(0x10000000) |
| |
| # define mad_f_tofixed(x) ((mad_fixed_t) \ |
| ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5)) |
| # define mad_f_todouble(x) ((double) \ |
| ((x) / (double) (1L << MAD_F_FRACBITS))) |
| |
| # define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS) |
| # define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1)) |
| /* (x should be positive) */ |
| |
| # define mad_f_fromint(x) ((x) << MAD_F_FRACBITS) |
| |
| # define mad_f_add(x, y) ((x) + (y)) |
| # define mad_f_sub(x, y) ((x) - (y)) |
| |
| # if defined(FPM_FLOAT) |
| # error "FPM_FLOAT not yet supported" |
| |
| # undef MAD_F |
| # define MAD_F(x) mad_f_todouble(x) |
| |
| # define mad_f_mul(x, y) ((x) * (y)) |
| # define mad_f_scale64 |
| |
| # undef ASO_ZEROCHECK |
| |
| # elif defined(FPM_64BIT) |
| |
| /* |
| * This version should be the most accurate if 64-bit types are supported by |
| * the compiler, although it may not be the most efficient. |
| */ |
| # if defined(OPT_ACCURACY) |
| # define mad_f_mul(x, y) \ |
| ((mad_fixed_t) \ |
| ((((mad_fixed64_t) (x) * (y)) + \ |
| (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS)) |
| # else |
| # define mad_f_mul(x, y) \ |
| ((mad_fixed_t) (((mad_fixed64_t) (x) * (y)) >> MAD_F_SCALEBITS)) |
| # endif |
| |
| # define MAD_F_SCALEBITS MAD_F_FRACBITS |
| |
| /* --- Intel --------------------------------------------------------------- */ |
| |
| # elif defined(FPM_INTEL) |
| |
| # if defined(_MSC_VER) |
| # pragma warning(push) |
| # pragma warning(disable: 4035) /* no return value */ |
| static __forceinline |
| mad_fixed_t mad_f_mul_inline(mad_fixed_t x, mad_fixed_t y) |
| { |
| enum { |
| fracbits = MAD_F_FRACBITS |
| }; |
| |
| __asm { |
| mov eax, x |
| imul y |
| shrd eax, edx, fracbits |
| } |
| |
| /* implicit return of eax */ |
| } |
| # pragma warning(pop) |
| |
| # define mad_f_mul mad_f_mul_inline |
| # define mad_f_scale64 |
| # else |
| /* |
| * This Intel version is fast and accurate; the disposition of the least |
| * significant bit depends on OPT_ACCURACY via mad_f_scale64(). |
| */ |
| # define MAD_F_MLX(hi, lo, x, y) \ |
| asm ("imull %3" \ |
| : "=a" (lo), "=d" (hi) \ |
| : "%a" (x), "rm" (y) \ |
| : "cc") |
| |
| # if defined(OPT_ACCURACY) |
| /* |
| * This gives best accuracy but is not very fast. |
| */ |
| # define MAD_F_MLA(hi, lo, x, y) \ |
| ({ mad_fixed64hi_t __hi; \ |
| mad_fixed64lo_t __lo; \ |
| MAD_F_MLX(__hi, __lo, (x), (y)); \ |
| asm ("addl %2,%0\n\t" \ |
| "adcl %3,%1" \ |
| : "=rm" (lo), "=rm" (hi) \ |
| : "r" (__lo), "r" (__hi), "0" (lo), "1" (hi) \ |
| : "cc"); \ |
| }) |
| # endif /* OPT_ACCURACY */ |
| |
| # if defined(OPT_ACCURACY) |
| /* |
| * Surprisingly, this is faster than SHRD followed by ADC. |
| */ |
| # define mad_f_scale64(hi, lo) \ |
| ({ mad_fixed64hi_t __hi_; \ |
| mad_fixed64lo_t __lo_; \ |
| mad_fixed_t __result; \ |
| asm ("addl %4,%2\n\t" \ |
| "adcl %5,%3" \ |
| : "=rm" (__lo_), "=rm" (__hi_) \ |
| : "0" (lo), "1" (hi), \ |
| "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \ |
| : "cc"); \ |
| asm ("shrdl %3,%2,%1" \ |
| : "=rm" (__result) \ |
| : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \ |
| : "cc"); \ |
| __result; \ |
| }) |
| # elif defined(OPT_INTEL) |
| /* |
| * Alternate Intel scaling that may or may not perform better. |
| */ |
| # define mad_f_scale64(hi, lo) \ |
| ({ mad_fixed_t __result; \ |
| asm ("shrl %3,%1\n\t" \ |
| "shll %4,%2\n\t" \ |
| "orl %2,%1" \ |
| : "=rm" (__result) \ |
| : "0" (lo), "r" (hi), \ |
| "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \ |
| : "cc"); \ |
| __result; \ |
| }) |
| # else |
| # define mad_f_scale64(hi, lo) \ |
| ({ mad_fixed_t __result; \ |
| asm ("shrdl %3,%2,%1" \ |
| : "=rm" (__result) \ |
| : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \ |
| : "cc"); \ |
| __result; \ |
| }) |
| # endif /* OPT_ACCURACY */ |
| |
| # define MAD_F_SCALEBITS MAD_F_FRACBITS |
| # endif |
| |
| /* --- ARM ----------------------------------------------------------------- */ |
| |
| # elif defined(FPM_ARM) |
| |
| /* |
| * This ARM V4 version is as accurate as FPM_64BIT but much faster. The |
| * least significant bit is properly rounded at no CPU cycle cost! |
| */ |
| # if 1 |
| /* |
| * This is faster than the default implementation via MAD_F_MLX() and |
| * mad_f_scale64(). |
| */ |
| # define mad_f_mul(x, y) \ |
| ({ mad_fixed64hi_t __hi; \ |
| mad_fixed64lo_t __lo; \ |
| mad_fixed_t __result; \ |
| asm ("smull %0, %1, %3, %4\n\t" \ |
| "movs %0, %0, lsr %5\n\t" \ |
| "adc %2, %0, %1, lsl %6" \ |
| : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \ |
| : "%r" (x), "r" (y), \ |
| "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ |
| : "cc"); \ |
| __result; \ |
| }) |
| # endif |
| |
| # define MAD_F_MLX(hi, lo, x, y) \ |
| asm ("smull %0, %1, %2, %3" \ |
| : "=&r" (lo), "=&r" (hi) \ |
| : "%r" (x), "r" (y)) |
| |
| # define MAD_F_MLA(hi, lo, x, y) \ |
| asm ("smlal %0, %1, %2, %3" \ |
| : "+r" (lo), "+r" (hi) \ |
| : "%r" (x), "r" (y)) |
| |
| # define MAD_F_MLN(hi, lo) \ |
| asm ("rsbs %0, %2, #0\n\t" \ |
| "rsc %1, %3, #0" \ |
| : "=r" (lo), "=r" (hi) \ |
| : "0" (lo), "1" (hi) \ |
| : "cc") |
| |
| # define mad_f_scale64(hi, lo) \ |
| ({ mad_fixed_t __result; \ |
| asm ("movs %0, %1, lsr %3\n\t" \ |
| "adc %0, %0, %2, lsl %4" \ |
| : "=&r" (__result) \ |
| : "r" (lo), "r" (hi), \ |
| "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ |
| : "cc"); \ |
| __result; \ |
| }) |
| |
| # define MAD_F_SCALEBITS MAD_F_FRACBITS |
| |
| /* --- MIPS ---------------------------------------------------------------- */ |
| |
| # elif defined(FPM_MIPS) |
| |
| /* |
| * This MIPS version is fast and accurate; the disposition of the least |
| * significant bit depends on OPT_ACCURACY via mad_f_scale64(). |
| */ |
| # define MAD_F_MLX(hi, lo, x, y) \ |
| asm ("mult %2,%3" \ |
| : "=l" (lo), "=h" (hi) \ |
| : "%r" (x), "r" (y)) |
| |
| # if defined(HAVE_MADD_ASM) |
| # define MAD_F_MLA(hi, lo, x, y) \ |
| asm ("madd %2,%3" \ |
| : "+l" (lo), "+h" (hi) \ |
| : "%r" (x), "r" (y)) |
| # elif defined(HAVE_MADD16_ASM) |
| /* |
| * This loses significant accuracy due to the 16-bit integer limit in the |
| * multiply/accumulate instruction. |
| */ |
| # define MAD_F_ML0(hi, lo, x, y) \ |
| asm ("mult %2,%3" \ |
| : "=l" (lo), "=h" (hi) \ |
| : "%r" ((x) >> 12), "r" ((y) >> 16)) |
| # define MAD_F_MLA(hi, lo, x, y) \ |
| asm ("madd16 %2,%3" \ |
| : "+l" (lo), "+h" (hi) \ |
| : "%r" ((x) >> 12), "r" ((y) >> 16)) |
| # define MAD_F_MLZ(hi, lo) ((mad_fixed_t) (lo)) |
| # endif |
| |
| # if defined(OPT_SPEED) |
| # define mad_f_scale64(hi, lo) \ |
| ((mad_fixed_t) ((hi) << (32 - MAD_F_SCALEBITS))) |
| # define MAD_F_SCALEBITS MAD_F_FRACBITS |
| # endif |
| |
| /* --- SPARC --------------------------------------------------------------- */ |
| |
| # elif defined(FPM_SPARC) |
| |
| /* |
| * This SPARC V8 version is fast and accurate; the disposition of the least |
| * significant bit depends on OPT_ACCURACY via mad_f_scale64(). |
| */ |
| # define MAD_F_MLX(hi, lo, x, y) \ |
| asm ("smul %2, %3, %0\n\t" \ |
| "rd %%y, %1" \ |
| : "=r" (lo), "=r" (hi) \ |
| : "%r" (x), "rI" (y)) |
| |
| /* --- PowerPC ------------------------------------------------------------- */ |
| |
| # elif defined(FPM_PPC) |
| |
| /* |
| * This PowerPC version is fast and accurate; the disposition of the least |
| * significant bit depends on OPT_ACCURACY via mad_f_scale64(). |
| */ |
| # define MAD_F_MLX(hi, lo, x, y) \ |
| do { \ |
| asm ("mullw %0,%1,%2" \ |
| : "=r" (lo) \ |
| : "%r" (x), "r" (y)); \ |
| asm ("mulhw %0,%1,%2" \ |
| : "=r" (hi) \ |
| : "%r" (x), "r" (y)); \ |
| } \ |
| while (0) |
| |
| # if defined(OPT_ACCURACY) |
| /* |
| * This gives best accuracy but is not very fast. |
| */ |
| # define MAD_F_MLA(hi, lo, x, y) \ |
| ({ mad_fixed64hi_t __hi; \ |
| mad_fixed64lo_t __lo; \ |
| MAD_F_MLX(__hi, __lo, (x), (y)); \ |
| asm ("addc %0,%2,%3\n\t" \ |
| "adde %1,%4,%5" \ |
| : "=r" (lo), "=r" (hi) \ |
| : "%r" (lo), "r" (__lo), \ |
| "%r" (hi), "r" (__hi) \ |
| : "xer"); \ |
| }) |
| # endif |
| |
| # if defined(OPT_ACCURACY) |
| /* |
| * This is slower than the truncating version below it. |
| */ |
| # define mad_f_scale64(hi, lo) \ |
| ({ mad_fixed_t __result, __round; \ |
| asm ("rotrwi %0,%1,%2" \ |
| : "=r" (__result) \ |
| : "r" (lo), "i" (MAD_F_SCALEBITS)); \ |
| asm ("extrwi %0,%1,1,0" \ |
| : "=r" (__round) \ |
| : "r" (__result)); \ |
| asm ("insrwi %0,%1,%2,0" \ |
| : "+r" (__result) \ |
| : "r" (hi), "i" (MAD_F_SCALEBITS)); \ |
| asm ("add %0,%1,%2" \ |
| : "=r" (__result) \ |
| : "%r" (__result), "r" (__round)); \ |
| __result; \ |
| }) |
| # else |
| # define mad_f_scale64(hi, lo) \ |
| ({ mad_fixed_t __result; \ |
| asm ("rotrwi %0,%1,%2" \ |
| : "=r" (__result) \ |
| : "r" (lo), "i" (MAD_F_SCALEBITS)); \ |
| asm ("insrwi %0,%1,%2,0" \ |
| : "+r" (__result) \ |
| : "r" (hi), "i" (MAD_F_SCALEBITS)); \ |
| __result; \ |
| }) |
| # endif |
| |
| # define MAD_F_SCALEBITS MAD_F_FRACBITS |
| |
| /* --- Default ------------------------------------------------------------- */ |
| |
| # elif defined(FPM_DEFAULT) |
| |
| /* |
| * This version is the most portable but it loses significant accuracy. |
| * Furthermore, accuracy is biased against the second argument, so care |
| * should be taken when ordering operands. |
| * |
| * The scale factors are constant as this is not used with SSO. |
| * |
| * Pre-rounding is required to stay within the limits of compliance. |
| */ |
| # if defined(OPT_SPEED) |
| # define mad_f_mul(x, y) (((x) >> 12) * ((y) >> 16)) |
| # else |
| # define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \ |
| (((y) + (1L << 15)) >> 16)) |
| # endif |
| |
| /* ------------------------------------------------------------------------- */ |
| |
| # else |
| # error "no FPM selected" |
| # endif |
| |
| /* default implementations */ |
| |
| # if !defined(mad_f_mul) |
| # define mad_f_mul(x, y) \ |
| ({ register mad_fixed64hi_t __hi; \ |
| register mad_fixed64lo_t __lo; \ |
| MAD_F_MLX(__hi, __lo, (x), (y)); \ |
| mad_f_scale64(__hi, __lo); \ |
| }) |
| # endif |
| |
| # if !defined(MAD_F_MLA) |
| # define MAD_F_ML0(hi, lo, x, y) ((lo) = mad_f_mul((x), (y))) |
| # define MAD_F_MLA(hi, lo, x, y) ((lo) += mad_f_mul((x), (y))) |
| # define MAD_F_MLN(hi, lo) ((lo) = -(lo)) |
| # define MAD_F_MLZ(hi, lo) ((void) (hi), (mad_fixed_t) (lo)) |
| # endif |
| |
| # if !defined(MAD_F_ML0) |
| # define MAD_F_ML0(hi, lo, x, y) MAD_F_MLX((hi), (lo), (x), (y)) |
| # endif |
| |
| # if !defined(MAD_F_MLN) |
| # define MAD_F_MLN(hi, lo) ((hi) = ((lo) = -(lo)) ? ~(hi) : -(hi)) |
| # endif |
| |
| # if !defined(MAD_F_MLZ) |
| # define MAD_F_MLZ(hi, lo) mad_f_scale64((hi), (lo)) |
| # endif |
| |
| # if !defined(mad_f_scale64) |
| # if defined(OPT_ACCURACY) |
| # define mad_f_scale64(hi, lo) \ |
| ((((mad_fixed_t) \ |
| (((hi) << (32 - (MAD_F_SCALEBITS - 1))) | \ |
| ((lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1) |
| # else |
| # define mad_f_scale64(hi, lo) \ |
| ((mad_fixed_t) \ |
| (((hi) << (32 - MAD_F_SCALEBITS)) | \ |
| ((lo) >> MAD_F_SCALEBITS))) |
| # endif |
| # define MAD_F_SCALEBITS MAD_F_FRACBITS |
| # endif |
| |
| /* C routines */ |
| |
| mad_fixed_t mad_f_abs(mad_fixed_t); |
| mad_fixed_t mad_f_div(mad_fixed_t, mad_fixed_t); |
| |
| # endif |
| |
| /* Id: bit.h,v 1.12 2004/01/23 09:41:32 rob Exp */ |
| |
| # ifndef LIBMAD_BIT_H |
| # define LIBMAD_BIT_H |
| |
| struct mad_bitptr { |
| unsigned char const *byte; |
| unsigned short cache; |
| unsigned short left; |
| }; |
| |
| void mad_bit_init(struct mad_bitptr *, unsigned char const *); |
| |
| # define mad_bit_finish(bitptr) /* nothing */ |
| |
| unsigned int mad_bit_length(struct mad_bitptr const *, |
| struct mad_bitptr const *); |
| |
| # define mad_bit_bitsleft(bitptr) ((bitptr)->left) |
| unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *); |
| |
| void mad_bit_skip(struct mad_bitptr *, unsigned int); |
| unsigned long mad_bit_read(struct mad_bitptr *, unsigned int); |
| void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long); |
| |
| unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short); |
| |
| # endif |
| |
| /* Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp */ |
| |
| # ifndef LIBMAD_TIMER_H |
| # define LIBMAD_TIMER_H |
| |
| typedef struct { |
| signed long seconds; /* whole seconds */ |
| unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */ |
| } mad_timer_t; |
| |
| extern mad_timer_t const mad_timer_zero; |
| |
| # define MAD_TIMER_RESOLUTION 352800000UL |
| |
| enum mad_units { |
| MAD_UNITS_HOURS = -2, |
| MAD_UNITS_MINUTES = -1, |
| MAD_UNITS_SECONDS = 0, |
| |
| /* metric units */ |
| |
| MAD_UNITS_DECISECONDS = 10, |
| MAD_UNITS_CENTISECONDS = 100, |
| MAD_UNITS_MILLISECONDS = 1000, |
| |
| /* audio sample units */ |
| |
| MAD_UNITS_8000_HZ = 8000, |
| MAD_UNITS_11025_HZ = 11025, |
| MAD_UNITS_12000_HZ = 12000, |
| |
| MAD_UNITS_16000_HZ = 16000, |
| MAD_UNITS_22050_HZ = 22050, |
| MAD_UNITS_24000_HZ = 24000, |
| |
| MAD_UNITS_32000_HZ = 32000, |
| MAD_UNITS_44100_HZ = 44100, |
| MAD_UNITS_48000_HZ = 48000, |
| |
| /* video frame/field units */ |
| |
| MAD_UNITS_24_FPS = 24, |
| MAD_UNITS_25_FPS = 25, |
| MAD_UNITS_30_FPS = 30, |
| MAD_UNITS_48_FPS = 48, |
| MAD_UNITS_50_FPS = 50, |
| MAD_UNITS_60_FPS = 60, |
| |
| /* CD audio frames */ |
| |
| MAD_UNITS_75_FPS = 75, |
| |
| /* video drop-frame units */ |
| |
| MAD_UNITS_23_976_FPS = -24, |
| MAD_UNITS_24_975_FPS = -25, |
| MAD_UNITS_29_97_FPS = -30, |
| MAD_UNITS_47_952_FPS = -48, |
| MAD_UNITS_49_95_FPS = -50, |
| MAD_UNITS_59_94_FPS = -60 |
| }; |
| |
| # define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero)) |
| |
| int mad_timer_compare(mad_timer_t, mad_timer_t); |
| |
| # define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero) |
| |
| void mad_timer_negate(mad_timer_t *); |
| mad_timer_t mad_timer_abs(mad_timer_t); |
| |
| void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long); |
| void mad_timer_add(mad_timer_t *, mad_timer_t); |
| void mad_timer_multiply(mad_timer_t *, signed long); |
| |
| signed long mad_timer_count(mad_timer_t, enum mad_units); |
| unsigned long mad_timer_fraction(mad_timer_t, unsigned long); |
| void mad_timer_string(mad_timer_t, char *, char const *, |
| enum mad_units, enum mad_units, unsigned long); |
| |
| # endif |
| |
| /* Id: stream.h,v 1.20 2004/02/05 09:02:39 rob Exp */ |
| |
| # ifndef LIBMAD_STREAM_H |
| # define LIBMAD_STREAM_H |
| |
| |
| # define MAD_BUFFER_GUARD 8 |
| # define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD) |
| |
| enum mad_error { |
| MAD_ERROR_NONE = 0x0000, /* no error */ |
| |
| MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */ |
| MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */ |
| |
| MAD_ERROR_NOMEM = 0x0031, /* not enough memory */ |
| |
| MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */ |
| MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */ |
| MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */ |
| MAD_ERROR_BADSAMPLERATE = 0x0104, /* reserved sample frequency value */ |
| MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */ |
| |
| MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */ |
| MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */ |
| MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */ |
| MAD_ERROR_BADMODE = 0x0222, /* bad bitrate/mode combination */ |
| MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */ |
| MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */ |
| MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */ |
| MAD_ERROR_BADSCFSI = 0x0234, /* bad scalefactor selection info */ |
| MAD_ERROR_BADDATAPTR = 0x0235, /* bad main_data_begin pointer */ |
| MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */ |
| MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */ |
| MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */ |
| MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for JS */ |
| }; |
| |
| # define MAD_RECOVERABLE(error) ((error) & 0xff00) |
| |
| struct mad_stream { |
| unsigned char const *buffer; /* input bitstream buffer */ |
| unsigned char const *bufend; /* end of buffer */ |
| unsigned long skiplen; /* bytes to skip before next frame */ |
| |
| int sync; /* stream sync found */ |
| unsigned long freerate; /* free bitrate (fixed) */ |
| |
| unsigned char const *this_frame; /* start of current frame */ |
| unsigned char const *next_frame; /* start of next frame */ |
| struct mad_bitptr ptr; /* current processing bit pointer */ |
| |
| struct mad_bitptr anc_ptr; /* ancillary bits pointer */ |
| unsigned int anc_bitlen; /* number of ancillary bits */ |
| |
| unsigned char(*main_data)[MAD_BUFFER_MDLEN]; |
| /* Layer III main_data() */ |
| unsigned int md_len; /* bytes in main_data */ |
| |
| int options; /* decoding options (see below) */ |
| enum mad_error error; /* error code (see above) */ |
| unsigned int muted_samples; |
| unsigned int muted_count; |
| }; |
| |
| enum { |
| MAD_OPTION_IGNORECRC = 0x0001, /* ignore CRC errors */ |
| MAD_OPTION_HALFSAMPLERATE = 0x0002 /* generate PCM at 1/2 sample rate */ |
| # if 0 /* not yet implemented */ |
| MAD_OPTION_LEFTCHANNEL = 0x0010, /* decode left channel only */ |
| MAD_OPTION_RIGHTCHANNEL = 0x0020, /* decode right channel only */ |
| MAD_OPTION_SINGLECHANNEL = 0x0030 /* combine channels */ |
| # endif |
| }; |
| |
| void mad_stream_init(struct mad_stream *); |
| void mad_stream_finish(struct mad_stream *); |
| |
| # define mad_stream_options(stream, opts) \ |
| ((void) ((stream)->options = (opts))) |
| |
| void mad_stream_buffer(struct mad_stream *, |
| unsigned char const *, unsigned long); |
| void mad_stream_skip(struct mad_stream *, unsigned long); |
| |
| int mad_stream_sync(struct mad_stream *); |
| |
| char const *mad_stream_errorstr(struct mad_stream const *); |
| |
| # endif |
| |
| /* Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp */ |
| |
| # ifndef LIBMAD_FRAME_H |
| # define LIBMAD_FRAME_H |
| |
| |
| enum mad_layer { |
| MAD_LAYER_I = 1, /* Layer I */ |
| MAD_LAYER_II = 2, /* Layer II */ |
| MAD_LAYER_III = 3 /* Layer III */ |
| }; |
| |
| enum mad_mode { |
| MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */ |
| MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */ |
| MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */ |
| MAD_MODE_STEREO = 3 /* normal LR stereo */ |
| }; |
| |
| enum mad_emphasis { |
| MAD_EMPHASIS_NONE = 0, /* no emphasis */ |
| MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */ |
| MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */ |
| MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */ |
| }; |
| |
| struct mad_header { |
| enum mad_layer layer; /* audio layer (1, 2, or 3) */ |
| enum mad_mode mode; /* channel mode (see above) */ |
| int mode_extension; /* additional mode info */ |
| enum mad_emphasis emphasis; /* de-emphasis to use (see above) */ |
| |
| unsigned long bitrate; /* stream bitrate (bps) */ |
| unsigned int samplerate; /* sampling frequency (Hz) */ |
| |
| unsigned short crc_check; /* frame CRC accumulator */ |
| unsigned short crc_target; /* final target CRC checksum */ |
| |
| int flags; /* flags (see below) */ |
| int private_bits; /* private bits (see below) */ |
| |
| mad_timer_t duration; /* audio playing time of frame */ |
| }; |
| |
| struct mad_frame { |
| struct mad_header header; /* MPEG audio header */ |
| |
| int options; /* decoding options (from stream) */ |
| |
| mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */ |
| mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */ |
| }; |
| |
| # define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1) |
| # define MAD_NSBSAMPLES(header) \ |
| ((header)->layer == MAD_LAYER_I ? 12 : \ |
| (((header)->layer == MAD_LAYER_III && \ |
| ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36)) |
| |
| enum { |
| MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */ |
| MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */ |
| |
| MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */ |
| MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */ |
| MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */ |
| MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */ |
| |
| MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */ |
| MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */ |
| MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */ |
| |
| MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */ |
| MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */ |
| MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */ |
| }; |
| |
| enum { |
| MAD_PRIVATE_HEADER = 0x0100, /* header private bit */ |
| MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */ |
| }; |
| |
| void mad_header_init(struct mad_header *); |
| |
| # define mad_header_finish(header) /* nothing */ |
| |
| int mad_header_decode(struct mad_header *, struct mad_stream *); |
| |
| void mad_frame_init(struct mad_frame *); |
| void mad_frame_finish(struct mad_frame *); |
| |
| int mad_frame_decode(struct mad_frame *, struct mad_stream *); |
| |
| void mad_frame_mute(struct mad_frame *); |
| |
| # endif |
| |
| /* Id: synth.h,v 1.15 2004/01/23 09:41:33 rob Exp */ |
| |
| # ifndef LIBMAD_SYNTH_H |
| # define LIBMAD_SYNTH_H |
| |
| |
| struct mad_pcm { |
| unsigned int samplerate; /* sampling frequency (Hz) */ |
| unsigned short channels; /* number of channels */ |
| unsigned short length; /* number of samples per channel */ |
| mad_fixed_t samples[2][1152]; /* PCM output samples [ch][sample] */ |
| }; |
| |
| struct mad_synth { |
| mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */ |
| /* [ch][eo][peo][s][v] */ |
| |
| unsigned int phase; /* current processing phase */ |
| |
| struct mad_pcm pcm; /* PCM output */ |
| }; |
| |
| /* single channel PCM selector */ |
| enum { |
| MAD_PCM_CHANNEL_SINGLE = 0 |
| }; |
| |
| /* dual channel PCM selector */ |
| enum { |
| MAD_PCM_CHANNEL_DUAL_1 = 0, |
| MAD_PCM_CHANNEL_DUAL_2 = 1 |
| }; |
| |
| /* stereo PCM selector */ |
| enum { |
| MAD_PCM_CHANNEL_STEREO_LEFT = 0, |
| MAD_PCM_CHANNEL_STEREO_RIGHT = 1 |
| }; |
| |
| void mad_synth_init(struct mad_synth *); |
| |
| # define mad_synth_finish(synth) /* nothing */ |
| |
| void mad_synth_mute(struct mad_synth *); |
| |
| void mad_synth_frame(struct mad_synth *, struct mad_frame const *); |
| |
| # endif |
| |
| /* Id: decoder.h,v 1.17 2004/01/23 09:41:32 rob Exp */ |
| |
| # ifndef LIBMAD_DECODER_H |
| # define LIBMAD_DECODER_H |
| |
| |
| enum mad_decoder_mode { |
| MAD_DECODER_MODE_SYNC = 0, |
| MAD_DECODER_MODE_ASYNC |
| }; |
| |
| enum mad_flow { |
| MAD_FLOW_CONTINUE = 0x0000, /* continue normally */ |
| MAD_FLOW_STOP = 0x0010, /* stop decoding normally */ |
| MAD_FLOW_BREAK = 0x0011, /* stop decoding and signal an error */ |
| MAD_FLOW_IGNORE = 0x0020 /* ignore the current frame */ |
| }; |
| |
| struct mad_decoder { |
| enum mad_decoder_mode mode; |
| |
| int options; |
| |
| struct { |
| long pid; |
| int in; |
| int out; |
| } async; |
| |
| struct { |
| struct mad_stream stream; |
| struct mad_frame frame; |
| struct mad_synth synth; |
| } *sync; |
| |
| void *cb_data; |
| |
| enum mad_flow(*input_func)(void *, struct mad_stream *); |
| enum mad_flow(*header_func)(void *, struct mad_header const *); |
| enum mad_flow(*filter_func)(void *, |
| struct mad_stream const *, struct mad_frame *); |
| enum mad_flow(*output_func)(void *, |
| struct mad_header const *, struct mad_pcm *); |
| enum mad_flow(*error_func)(void *, struct mad_stream *, struct mad_frame *); |
| enum mad_flow(*message_func)(void *, void *, unsigned int *); |
| }; |
| |
| void mad_decoder_init(struct mad_decoder *, void *, |
| enum mad_flow(*)(void *, struct mad_stream *), |
| enum mad_flow(*)(void *, struct mad_header const *), |
| enum mad_flow(*)(void *, |
| struct mad_stream const *, |
| struct mad_frame *), |
| enum mad_flow(*)(void *, |
| struct mad_header const *, |
| struct mad_pcm *), |
| enum mad_flow(*)(void *, |
| struct mad_stream *, |
| struct mad_frame *), |
| enum mad_flow(*)(void *, void *, unsigned int *)); |
| int mad_decoder_finish(struct mad_decoder *); |
| |
| # define mad_decoder_options(decoder, opts) \ |
| ((void) ((decoder)->options = (opts))) |
| |
| int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode); |
| int mad_decoder_message(struct mad_decoder *, void *, unsigned int *); |
| |
| # endif |
| |
| # ifdef __cplusplus |
| } |
| # endif |