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FFmpeg/libavformat/isom.c

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  1. /*

  2.  * ISO Media common code

  3.  * Copyright (c) 2001 Fabrice Bellard

  4.  * Copyright (c) 2002 Francois Revol <revol@free.fr>

  5.  * Copyright (c) 2006 Baptiste Coudurier <baptiste.coudurier@free.fr>

  6.  *

  7.  * This file is part of FFmpeg.

  8.  *

  9.  * FFmpeg is free software; you can redistribute it and/or

  10.  * modify it under the terms of the GNU Lesser General Public

  11.  * License as published by the Free Software Foundation; either

  12.  * version 2.1 of the License, or (at your option) any later version.

  13.  *

  14.  * FFmpeg is distributed in the hope that it will be useful,

  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  17.  * Lesser General Public License for more details.

  18.  *

  19.  * You should have received a copy of the GNU Lesser General Public

  20.  * License along with FFmpeg; if not, write to the Free Software

  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  22.  */

  23. 

  24. #include "avformat.h"

  25. #include "internal.h"

  26. #include "isom.h"

  27. #include "libavcodec/mpeg4audio.h"

  28. #include "libavcodec/mpegaudiodata.h"

  29. #include "libavutil/avstring.h"

  30. #include "libavutil/intreadwrite.h"

  31. 

  32. /* http://www.mp4ra.org */

  33. /* ordered by muxing preference */

  34. const AVCodecTag ff_mp4_obj_type[] = {

  35.     { AV_CODEC_ID_MOV_TEXT    , 0x08 },

  36.     { AV_CODEC_ID_MPEG4       , 0x20 },

  37.     { AV_CODEC_ID_H264        , 0x21 },

  38.     { AV_CODEC_ID_HEVC        , 0x23 },

  39.     { AV_CODEC_ID_AAC         , 0x40 },

  40.     { AV_CODEC_ID_MP4ALS      , 0x40 }, /* 14496-3 ALS */

  41.     { AV_CODEC_ID_MPEG2VIDEO  , 0x61 }, /* MPEG2 Main */

  42.     { AV_CODEC_ID_MPEG2VIDEO  , 0x60 }, /* MPEG2 Simple */

  43.     { AV_CODEC_ID_MPEG2VIDEO  , 0x62 }, /* MPEG2 SNR */

  44.     { AV_CODEC_ID_MPEG2VIDEO  , 0x63 }, /* MPEG2 Spatial */

  45.     { AV_CODEC_ID_MPEG2VIDEO  , 0x64 }, /* MPEG2 High */

  46.     { AV_CODEC_ID_MPEG2VIDEO  , 0x65 }, /* MPEG2 422 */

  47.     { AV_CODEC_ID_AAC         , 0x66 }, /* MPEG2 AAC Main */

  48.     { AV_CODEC_ID_AAC         , 0x67 }, /* MPEG2 AAC Low */

  49.     { AV_CODEC_ID_AAC         , 0x68 }, /* MPEG2 AAC SSR */

  50.     { AV_CODEC_ID_MP3         , 0x69 }, /* 13818-3 */

  51.     { AV_CODEC_ID_MP2         , 0x69 }, /* 11172-3 */

  52.     { AV_CODEC_ID_MPEG1VIDEO  , 0x6A }, /* 11172-2 */

  53.     { AV_CODEC_ID_MP3         , 0x6B }, /* 11172-3 */

  54.     { AV_CODEC_ID_MJPEG       , 0x6C }, /* 10918-1 */

  55.     { AV_CODEC_ID_PNG         , 0x6D },

  56.     { AV_CODEC_ID_JPEG2000    , 0x6E }, /* 15444-1 */

  57.     { AV_CODEC_ID_VC1         , 0xA3 },

  58.     { AV_CODEC_ID_DIRAC       , 0xA4 },

  59.     { AV_CODEC_ID_AC3         , 0xA5 },

  60.     { AV_CODEC_ID_EAC3        , 0xA6 },

  61.     { AV_CODEC_ID_DTS         , 0xA9 }, /* mp4ra.org */

  62.     { AV_CODEC_ID_TSCC2       , 0xD0 }, /* non standard, camtasia uses it */

  63.     { AV_CODEC_ID_VORBIS      , 0xDD }, /* non standard, gpac uses it */

  64.     { AV_CODEC_ID_DVD_SUBTITLE, 0xE0 }, /* non standard, see unsupported-embedded-subs-2.mp4 */

  65.     { AV_CODEC_ID_QCELP       , 0xE1 },

  66.     { AV_CODEC_ID_MPEG4SYSTEMS, 0x01 },

  67.     { AV_CODEC_ID_MPEG4SYSTEMS, 0x02 },

  68.     { AV_CODEC_ID_NONE        ,    0 },

  69. };

  70. 

  71. const AVCodecTag ff_codec_movvideo_tags[] = {

  72. /*  { AV_CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */

  73. 

  74.     { AV_CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */

  75.     { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */

  76.     { AV_CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */

  77.     { AV_CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', 's') }, /* same as 2vuy but byte swapped */

  78. 

  79.     { AV_CODEC_ID_RAWVIDEO, MKTAG('L', '5', '5', '5') },

  80.     { AV_CODEC_ID_RAWVIDEO, MKTAG('L', '5', '6', '5') },

  81.     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', '5', '6', '5') },

  82.     { AV_CODEC_ID_RAWVIDEO, MKTAG('2', '4', 'B', 'G') },

  83.     { AV_CODEC_ID_RAWVIDEO, MKTAG('B', 'G', 'R', 'A') },

  84.     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', 'G', 'B', 'A') },

  85.     { AV_CODEC_ID_RAWVIDEO, MKTAG('A', 'B', 'G', 'R') },

  86.     { AV_CODEC_ID_RAWVIDEO, MKTAG('b', '1', '6', 'g') },

  87.     { AV_CODEC_ID_RAWVIDEO, MKTAG('b', '4', '8', 'r') },

  88.     { AV_CODEC_ID_RAWVIDEO, MKTAG('b', 'x', 'b', 'g') }, /* BOXX */

  89.     { AV_CODEC_ID_RAWVIDEO, MKTAG('b', 'x', 'r', 'g') },

  90.     { AV_CODEC_ID_RAWVIDEO, MKTAG('b', 'x', 'y', 'v') },

  91.     { AV_CODEC_ID_RAWVIDEO, MKTAG('N', 'O', '1', '6') },

  92.     { AV_CODEC_ID_RAWVIDEO, MKTAG('D', 'V', 'O', 'O') }, /* Digital Voodoo SD 8 Bit */

  93.     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', '4', '2', '0') }, /* Radius DV YUV PAL */

  94.     { AV_CODEC_ID_RAWVIDEO, MKTAG('R', '4', '1', '1') }, /* Radius DV YUV NTSC */

  95. 

  96.     { AV_CODEC_ID_R10K,   MKTAG('R', '1', '0', 'k') }, /* UNCOMPRESSED 10BIT RGB */

  97.     { AV_CODEC_ID_R10K,   MKTAG('R', '1', '0', 'g') }, /* UNCOMPRESSED 10BIT RGB */

  98.     { AV_CODEC_ID_R210,   MKTAG('r', '2', '1', '0') }, /* UNCOMPRESSED 10BIT RGB */

  99.     { AV_CODEC_ID_AVUI,   MKTAG('A', 'V', 'U', 'I') }, /* AVID Uncompressed deinterleaved UYVY422 */

  100.     { AV_CODEC_ID_AVRP,   MKTAG('A', 'V', 'r', 'p') }, /* Avid 1:1 10-bit RGB Packer */

  101.     { AV_CODEC_ID_AVRP,   MKTAG('S', 'U', 'D', 'S') }, /* Avid DS Uncompressed */

  102.     { AV_CODEC_ID_V210,   MKTAG('v', '2', '1', '0') }, /* UNCOMPRESSED 10BIT 4:2:2 */

  103.     { AV_CODEC_ID_V210,   MKTAG('b', 'x', 'y', '2') }, /* BOXX 10BIT 4:2:2 */

  104.     { AV_CODEC_ID_V308,   MKTAG('v', '3', '0', '8') }, /* UNCOMPRESSED  8BIT 4:4:4 */

  105.     { AV_CODEC_ID_V408,   MKTAG('v', '4', '0', '8') }, /* UNCOMPRESSED  8BIT 4:4:4:4 */

  106.     { AV_CODEC_ID_V410,   MKTAG('v', '4', '1', '0') }, /* UNCOMPRESSED 10BIT 4:4:4 */

  107.     { AV_CODEC_ID_Y41P,   MKTAG('Y', '4', '1', 'P') }, /* UNCOMPRESSED 12BIT 4:1:1 */

  108.     { AV_CODEC_ID_YUV4,   MKTAG('y', 'u', 'v', '4') }, /* libquicktime packed yuv420p */

  109.     { AV_CODEC_ID_TARGA_Y216, MKTAG('Y', '2', '1', '6') },

  110. 

  111.     { AV_CODEC_ID_MJPEG,  MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */

  112.     { AV_CODEC_ID_MJPEG,  MKTAG('m', 'j', 'p', 'a') }, /* Motion-JPEG (format A) */

  113.     { AV_CODEC_ID_MJPEG,  MKTAG('A', 'V', 'D', 'J') }, /* MJPEG with alpha-channel (AVID JFIF meridien compressed) */

  114. /*  { AV_CODEC_ID_MJPEG,  MKTAG('A', 'V', 'R', 'n') }, *//* MJPEG with alpha-channel (AVID ABVB/Truevision NuVista) */

  115.     { AV_CODEC_ID_MJPEG,  MKTAG('d', 'm', 'b', '1') }, /* Motion JPEG OpenDML */

  116.     { AV_CODEC_ID_MJPEGB, MKTAG('m', 'j', 'p', 'b') }, /* Motion-JPEG (format B) */

  117. 

  118.     { AV_CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */

  119.     { AV_CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */

  120.     { AV_CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/

  121.     { AV_CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */

  122. 

  123.     { AV_CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },

  124.     { AV_CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */

  125.     { AV_CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },

  126.     { AV_CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */

  127. 

  128.     { AV_CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */

  129.     { AV_CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */

  130. 

  131.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', 'p') }, /* DV PAL */

  132.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */

  133.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'p', 'p') }, /* DVCPRO PAL produced by FCP */

  134.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'p') }, /* DVCPRO50 PAL produced by FCP */

  135.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', '5', 'n') }, /* DVCPRO50 NTSC produced by FCP */

  136.     { AV_CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, /* AVID DV */

  137.     { AV_CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', '1') }, /* AVID DV100 */

  138.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'q') }, /* DVCPRO HD 720p50 */

  139.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'p') }, /* DVCPRO HD 720p60 */

  140.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '1') },

  141.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '2') },

  142.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '4') },

  143.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '5') }, /* DVCPRO HD 50i produced by FCP */

  144.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '6') }, /* DVCPRO HD 60i produced by FCP */

  145.     { AV_CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', '3') }, /* DVCPRO HD 30p produced by FCP */

  146. 

  147.     { AV_CODEC_ID_VP3,     MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */

  148.     { AV_CODEC_ID_RPZA,    MKTAG('r', 'p', 'z', 'a') }, /* Apple Video (RPZA) */

  149.     { AV_CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */

  150.     { AV_CODEC_ID_8BPS,    MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */

  151.     { AV_CODEC_ID_SMC,     MKTAG('s', 'm', 'c', ' ') }, /* Apple Graphics (SMC) */

  152.     { AV_CODEC_ID_QTRLE,   MKTAG('r', 'l', 'e', ' ') }, /* Apple Animation (RLE) */

  153.     { AV_CODEC_ID_SGIRLE,  MKTAG('r', 'l', 'e', '1') }, /* SGI RLE 8-bit */

  154.     { AV_CODEC_ID_MSRLE,   MKTAG('W', 'R', 'L', 'E') },

  155.     { AV_CODEC_ID_QDRAW,   MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */

  156. 

  157.     { AV_CODEC_ID_RAWVIDEO, MKTAG('W', 'R', 'A', 'W') },

  158. 

  159.     { AV_CODEC_ID_HEVC, MKTAG('h', 'e', 'v', '1') }, /* HEVC/H.265 which indicates parameter sets may be in ES */

  160.     { AV_CODEC_ID_HEVC, MKTAG('h', 'v', 'c', '1') }, /* HEVC/H.265 which indicates parameter sets shall not be in ES */

  161. 

  162.     { AV_CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */

  163.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '5', 'p') }, /* AVC-Intra  50M 720p24/30/60 */

  164.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '5', 'q') }, /* AVC-Intra  50M 720p25/50 */

  165.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '5', '2') }, /* AVC-Intra  50M 1080p25/50 */

  166.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '5', '3') }, /* AVC-Intra  50M 1080p24/30/60 */

  167.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '5', '5') }, /* AVC-Intra  50M 1080i50 */

  168.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '5', '6') }, /* AVC-Intra  50M 1080i60 */

  169.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '1', 'p') }, /* AVC-Intra 100M 720p24/30/60 */

  170.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '1', 'q') }, /* AVC-Intra 100M 720p25/50 */

  171.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '1', '2') }, /* AVC-Intra 100M 1080p25/50 */

  172.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '1', '3') }, /* AVC-Intra 100M 1080p24/30/60 */

  173.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '1', '5') }, /* AVC-Intra 100M 1080i50 */

  174.     { AV_CODEC_ID_H264, MKTAG('a', 'i', '1', '6') }, /* AVC-Intra 100M 1080i60 */

  175.     { AV_CODEC_ID_H264, MKTAG('A', 'V', 'i', 'n') }, /* AVC-Intra with implicit SPS/PPS */

  176.     { AV_CODEC_ID_H264, MKTAG('a', 'i', 'v', 'x') }, /* XAVC 4:2:2 10bit */

  177.     { AV_CODEC_ID_H264, MKTAG('r', 'v', '6', '4') }, /* X-Com Radvision */

  178. 

  179.     { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', ' ') },

  180.     { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', '1', 'v', '1') }, /* Apple MPEG-1 Camcorder */

  181.     { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */

  182.     { AV_CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', '1', 'v') }, /* CoreMedia CMVideoCodecType */

  183.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', '2', 'v', '1') }, /* Apple MPEG-2 Camcorder */

  184.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '1') }, /* MPEG2 HDV 720p30 */

  185.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 HDV 1080i60 */

  186.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* MPEG2 HDV 1080i50 */

  187.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '4') }, /* MPEG2 HDV 720p24 */

  188.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '5') }, /* MPEG2 HDV 720p25 */

  189.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '6') }, /* MPEG2 HDV 1080p24 */

  190.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '7') }, /* MPEG2 HDV 1080p25 */

  191.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '8') }, /* MPEG2 HDV 1080p30 */

  192.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '9') }, /* MPEG2 HDV 720p60 JVC */

  193.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', 'a') }, /* MPEG2 HDV 720p50 */

  194.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */

  195.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */

  196.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'n') }, /* MPEG2 IMX NTSC 525/60 40mb/s produced by FCP */

  197.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '4', 'p') }, /* MPEG2 IMX PAL 625/50 40mb/s produced by FCP */

  198.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */

  199.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */

  200.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '1') }, /* XDCAM HD422 720p30 CBR */

  201.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '4') }, /* XDCAM HD422 720p24 CBR */

  202.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '5') }, /* XDCAM HD422 720p25 CBR */

  203.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', '9') }, /* XDCAM HD422 720p60 CBR */

  204.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'a') }, /* XDCAM HD422 720p50 CBR */

  205.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'b') }, /* XDCAM HD422 1080i60 CBR */

  206.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'c') }, /* XDCAM HD422 1080i50 CBR */

  207.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'd') }, /* XDCAM HD422 1080p24 CBR */

  208.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'e') }, /* XDCAM HD422 1080p25 CBR */

  209.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', '5', 'f') }, /* XDCAM HD422 1080p30 CBR */

  210.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '1') }, /* XDCAM EX 720p30 VBR */

  211.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '2') }, /* XDCAM HD 1080i60 */

  212.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '3') }, /* XDCAM HD 1080i50 VBR */

  213.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '4') }, /* XDCAM EX 720p24 VBR */

  214.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '5') }, /* XDCAM EX 720p25 VBR */

  215.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '6') }, /* XDCAM HD 1080p24 VBR */

  216.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '7') }, /* XDCAM HD 1080p25 VBR */

  217.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '8') }, /* XDCAM HD 1080p30 VBR */

  218.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', '9') }, /* XDCAM EX 720p60 VBR */

  219.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'a') }, /* XDCAM EX 720p50 VBR */

  220.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'b') }, /* XDCAM EX 1080i60 VBR */

  221.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'c') }, /* XDCAM EX 1080i50 VBR */

  222.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'd') }, /* XDCAM EX 1080p24 VBR */

  223.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'e') }, /* XDCAM EX 1080p25 VBR */

  224.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'v', 'f') }, /* XDCAM EX 1080p30 VBR */

  225.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'h', 'd') }, /* XDCAM HD 540p */

  226.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('x', 'd', 'h', '2') }, /* XDCAM HD422 540p */

  227.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('A', 'V', 'm', 'p') }, /* AVID IMX PAL */

  228.     { AV_CODEC_ID_MPEG2VIDEO, MKTAG('m', 'p', '2', 'v') }, /* FCP5 */

  229. 

  230.     { AV_CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */

  231. 

  232.     { AV_CODEC_ID_TARGA, MKTAG('t', 'g', 'a', ' ') }, /* Truevision Targa */

  233.     { AV_CODEC_ID_TIFF,  MKTAG('t', 'i', 'f', 'f') }, /* TIFF embedded in MOV */

  234.     { AV_CODEC_ID_GIF,   MKTAG('g', 'i', 'f', ' ') }, /* embedded gif files as frames (usually one "click to play movie" frame) */

  235.     { AV_CODEC_ID_PNG,   MKTAG('p', 'n', 'g', ' ') },

  236.     { AV_CODEC_ID_PNG,   MKTAG('M', 'N', 'G', ' ') },

  237. 

  238.     { AV_CODEC_ID_VC1, MKTAG('v', 'c', '-', '1') }, /* SMPTE RP 2025 */

  239.     { AV_CODEC_ID_CAVS, MKTAG('a', 'v', 's', '2') },

  240. 

  241.     { AV_CODEC_ID_DIRAC,     MKTAG('d', 'r', 'a', 'c') },

  242.     { AV_CODEC_ID_DNXHD,     MKTAG('A', 'V', 'd', 'n') }, /* AVID DNxHD */

  243.     { AV_CODEC_ID_H263,      MKTAG('H', '2', '6', '3') },

  244.     { AV_CODEC_ID_MSMPEG4V3, MKTAG('3', 'I', 'V', 'D') }, /* 3ivx DivX Doctor */

  245.     { AV_CODEC_ID_RAWVIDEO,  MKTAG('A', 'V', '1', 'x') }, /* AVID 1:1x */

  246.     { AV_CODEC_ID_RAWVIDEO,  MKTAG('A', 'V', 'u', 'p') },

  247.     { AV_CODEC_ID_SGI,       MKTAG('s', 'g', 'i', ' ') }, /* SGI  */

  248.     { AV_CODEC_ID_DPX,       MKTAG('d', 'p', 'x', ' ') }, /* DPX */

  249.     { AV_CODEC_ID_EXR,       MKTAG('e', 'x', 'r', ' ') }, /* OpenEXR */

  250. 

  251.     { AV_CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'h') }, /* Apple ProRes 422 High Quality */

  252.     { AV_CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'n') }, /* Apple ProRes 422 Standard Definition */

  253.     { AV_CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 's') }, /* Apple ProRes 422 LT */

  254.     { AV_CODEC_ID_PRORES, MKTAG('a', 'p', 'c', 'o') }, /* Apple ProRes 422 Proxy */

  255.     { AV_CODEC_ID_PRORES, MKTAG('a', 'p', '4', 'h') }, /* Apple ProRes 4444 */

  256.     { AV_CODEC_ID_PRORES, MKTAG('a', 'p', '4', 'x') }, /* Apple ProRes 4444 XQ */

  257.     { AV_CODEC_ID_FLIC,   MKTAG('f', 'l', 'i', 'c') },

  258. 

  259.     { AV_CODEC_ID_AIC, MKTAG('i', 'c', 'o', 'd') },

  260. 

  261.     { AV_CODEC_ID_NONE, 0 },

  262. };

  263. 

  264. const AVCodecTag ff_codec_movaudio_tags[] = {

  265.     { AV_CODEC_ID_AAC,             MKTAG('m', 'p', '4', 'a') },

  266.     { AV_CODEC_ID_AC3,             MKTAG('a', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F */

  267.     { AV_CODEC_ID_AC3,             MKTAG('s', 'a', 'c', '3') }, /* Nero Recode */

  268.     { AV_CODEC_ID_ADPCM_IMA_QT,    MKTAG('i', 'm', 'a', '4') },

  269.     { AV_CODEC_ID_ALAC,            MKTAG('a', 'l', 'a', 'c') },

  270.     { AV_CODEC_ID_AMR_NB,          MKTAG('s', 'a', 'm', 'r') }, /* AMR-NB 3gp */

  271.     { AV_CODEC_ID_AMR_WB,          MKTAG('s', 'a', 'w', 'b') }, /* AMR-WB 3gp */

  272.     { AV_CODEC_ID_DTS,             MKTAG('d', 't', 's', 'c') }, /* DTS formats prior to DTS-HD */

  273.     { AV_CODEC_ID_DTS,             MKTAG('d', 't', 's', 'h') }, /* DTS-HD audio formats */

  274.     { AV_CODEC_ID_DTS,             MKTAG('d', 't', 's', 'l') }, /* DTS-HD Lossless formats */

  275.     { AV_CODEC_ID_DTS,             MKTAG('D', 'T', 'S', ' ') }, /* non-standard */

  276.     { AV_CODEC_ID_EAC3,            MKTAG('e', 'c', '-', '3') }, /* ETSI TS 102 366 Annex F (only valid in ISOBMFF) */

  277.     { AV_CODEC_ID_DVAUDIO,         MKTAG('v', 'd', 'v', 'a') },

  278.     { AV_CODEC_ID_DVAUDIO,         MKTAG('d', 'v', 'c', 'a') },

  279.     { AV_CODEC_ID_GSM,             MKTAG('a', 'g', 's', 'm') },

  280.     { AV_CODEC_ID_ILBC,            MKTAG('i', 'l', 'b', 'c') },

  281.     { AV_CODEC_ID_MACE3,           MKTAG('M', 'A', 'C', '3') },

  282.     { AV_CODEC_ID_MACE6,           MKTAG('M', 'A', 'C', '6') },

  283.     { AV_CODEC_ID_MP1,             MKTAG('.', 'm', 'p', '1') },

  284.     { AV_CODEC_ID_MP2,             MKTAG('.', 'm', 'p', '2') },

  285.     { AV_CODEC_ID_MP3,             MKTAG('.', 'm', 'p', '3') },

  286.     { AV_CODEC_ID_MP3,             0x6D730055                },

  287.     { AV_CODEC_ID_NELLYMOSER,      MKTAG('n', 'm', 'o', 's') }, /* Flash Media Server */

  288.     { AV_CODEC_ID_PCM_ALAW,        MKTAG('a', 'l', 'a', 'w') },

  289.     { AV_CODEC_ID_PCM_F32BE,       MKTAG('f', 'l', '3', '2') },

  290.     { AV_CODEC_ID_PCM_F32LE,       MKTAG('f', 'l', '3', '2') },

  291.     { AV_CODEC_ID_PCM_F64BE,       MKTAG('f', 'l', '6', '4') },

  292.     { AV_CODEC_ID_PCM_F64LE,       MKTAG('f', 'l', '6', '4') },

  293.     { AV_CODEC_ID_PCM_MULAW,       MKTAG('u', 'l', 'a', 'w') },

  294.     { AV_CODEC_ID_PCM_S16BE,       MKTAG('t', 'w', 'o', 's') },

  295.     { AV_CODEC_ID_PCM_S16LE,       MKTAG('s', 'o', 'w', 't') },

  296.     { AV_CODEC_ID_PCM_S16BE,       MKTAG('l', 'p', 'c', 'm') },

  297.     { AV_CODEC_ID_PCM_S16LE,       MKTAG('l', 'p', 'c', 'm') },

  298.     { AV_CODEC_ID_PCM_S24BE,       MKTAG('i', 'n', '2', '4') },

  299.     { AV_CODEC_ID_PCM_S24LE,       MKTAG('i', 'n', '2', '4') },

  300.     { AV_CODEC_ID_PCM_S32BE,       MKTAG('i', 'n', '3', '2') },

  301.     { AV_CODEC_ID_PCM_S32LE,       MKTAG('i', 'n', '3', '2') },

  302.     { AV_CODEC_ID_PCM_S8,          MKTAG('s', 'o', 'w', 't') },

  303.     { AV_CODEC_ID_PCM_U8,          MKTAG('r', 'a', 'w', ' ') },

  304.     { AV_CODEC_ID_PCM_U8,          MKTAG('N', 'O', 'N', 'E') },

  305.     { AV_CODEC_ID_QCELP,           MKTAG('Q', 'c', 'l', 'p') },

  306.     { AV_CODEC_ID_QCELP,           MKTAG('Q', 'c', 'l', 'q') },

  307.     { AV_CODEC_ID_QCELP,           MKTAG('s', 'q', 'c', 'p') }, /* ISO Media fourcc */

  308.     { AV_CODEC_ID_QDM2,            MKTAG('Q', 'D', 'M', '2') },

  309.     { AV_CODEC_ID_QDMC,            MKTAG('Q', 'D', 'M', 'C') },

  310.     { AV_CODEC_ID_SPEEX,           MKTAG('s', 'p', 'e', 'x') }, /* Flash Media Server */

  311.     { AV_CODEC_ID_SPEEX,           MKTAG('S', 'P', 'X', 'N') }, /* ZygoAudio (quality 10 mode) */

  312.     { AV_CODEC_ID_WMAV2,           MKTAG('W', 'M', 'A', '2') },

  313.     { AV_CODEC_ID_EVRC,            MKTAG('s', 'e', 'v', 'c') }, /* 3GPP2 */

  314.     { AV_CODEC_ID_SMV,             MKTAG('s', 's', 'm', 'v') }, /* 3GPP2 */

  315.     { AV_CODEC_ID_NONE, 0 },

  316. };

  317. 

  318. const AVCodecTag ff_codec_movsubtitle_tags[] = {

  319.     { AV_CODEC_ID_MOV_TEXT, MKTAG('t', 'e', 'x', 't') },

  320.     { AV_CODEC_ID_MOV_TEXT, MKTAG('t', 'x', '3', 'g') },

  321.     { AV_CODEC_ID_EIA_608,  MKTAG('c', '6', '0', '8') },

  322.     { AV_CODEC_ID_NONE, 0 },

  323. };

  324. 

  325. /* map numeric codes from mdhd atom to ISO 639 */

  326. /* cf. QTFileFormat.pdf p253, qtff.pdf p205 */

  327. /* http://developer.apple.com/documentation/mac/Text/Text-368.html */

  328. /* deprecated by putting the code as 3*5bit ascii */

  329. static const char mov_mdhd_language_map[][4] = {

  330.     /* 0-9 */

  331.     "eng", "fra", "ger", "ita", "dut", "sve", "spa", "dan", "por", "nor",

  332.     "heb", "jpn", "ara", "fin", "gre", "ice", "mlt", "tur", "hr "/*scr*/, "chi"/*ace?*/,

  333.     "urd", "hin", "tha", "kor", "lit", "pol", "hun", "est", "lav",    "",

  334.     "fo ",    "", "rus", "chi",    "", "iri", "alb", "ron", "ces", "slk",

  335.     "slv", "yid", "sr ", "mac", "bul", "ukr", "bel", "uzb", "kaz", "aze",

  336.     /*?*/

  337.     "aze", "arm", "geo", "mol", "kir", "tgk", "tuk", "mon",    "", "pus",

  338.     "kur", "kas", "snd", "tib", "nep", "san", "mar", "ben", "asm", "guj",

  339.     "pa ", "ori", "mal", "kan", "tam", "tel",    "", "bur", "khm", "lao",

  340.     /*                   roman? arabic? */

  341.     "vie", "ind", "tgl", "may", "may", "amh", "tir", "orm", "som", "swa",

  342.     /*==rundi?*/

  343.        "", "run",    "", "mlg", "epo",    "",    "",    "",    "",    "",

  344.     /* 100 */

  345.        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",

  346.        "",    "",    "",    "",    "",    "",    "",    "",    "",    "",

  347.        "",    "",    "",    "",    "",    "",    "",    "", "wel", "baq",

  348.     "cat", "lat", "que", "grn", "aym", "tat", "uig", "dzo", "jav"

  349. };

  350. 

  351. int ff_mov_iso639_to_lang(const char lang[4], int mp4)

  352. {

  353.     int i, code = 0;

  354. 

  355.     /* old way, only for QT? */

  356.     for (i = 0; lang[0] && !mp4 && i < FF_ARRAY_ELEMS(mov_mdhd_language_map); i++) {

  357.         if (!strcmp(lang, mov_mdhd_language_map[i]))

  358.             return i;

  359.     }

  360.     /* XXX:can we do that in mov too? */

  361.     if (!mp4)

  362.         return -1;

  363.     /* handle undefined as such */

  364.     if (lang[0] == '\0')

  365.         lang = "und";

  366.     /* 5bit ascii */

  367.     for (i = 0; i < 3; i++) {

  368.         uint8_t c = lang[i];

  369.         c -= 0x60;

  370.         if (c > 0x1f)

  371.             return -1;

  372.         code <<= 5;

  373.         code |= c;

  374.     }

  375.     return code;

  376. }

  377. 

  378. int ff_mov_lang_to_iso639(unsigned code, char to[4])

  379. {

  380.     int i;

  381.     memset(to, 0, 4);

  382.     /* is it the mangled iso code? */

  383.     /* see http://www.geocities.com/xhelmboyx/quicktime/formats/mp4-layout.txt */

  384.     if (code >= 0x400 && code != 0x7fff) {

  385.         for (i = 2; i >= 0; i--) {

  386.             to[i] = 0x60 + (code & 0x1f);

  387.             code >>= 5;

  388.         }

  389.         return 1;

  390.     }

  391.     /* old fashion apple lang code */

  392.     if (code >= FF_ARRAY_ELEMS(mov_mdhd_language_map))

  393.         return 0;

  394.     if (!mov_mdhd_language_map[code][0])

  395.         return 0;

  396.     memcpy(to, mov_mdhd_language_map[code], 4);

  397.     return 1;

  398. }

  399. 

  400. int ff_mp4_read_descr_len(AVIOContext *pb)

  401. {

  402.     int len = 0;

  403.     int count = 4;

  404.     while (count--) {

  405.         int c = avio_r8(pb);

  406.         len = (len << 7) | (c & 0x7f);

  407.         if (!(c & 0x80))

  408.             break;

  409.     }

  410.     return len;

  411. }

  412. 

  413. int ff_mp4_read_descr(AVFormatContext *fc, AVIOContext *pb, int *tag)

  414. {

  415.     int len;

  416.     *tag = avio_r8(pb);

  417.     len = ff_mp4_read_descr_len(pb);

  418.     av_log(fc, AV_LOG_TRACE, "MPEG4 description: tag=0x%02x len=%d\n", *tag, len);

  419.     return len;

  420. }

  421. 

  422. void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id)

  423. {

  424.      int flags;

  425.      if (es_id) *es_id = avio_rb16(pb);

  426.      else                avio_rb16(pb);

  427.      flags = avio_r8(pb);

  428.      if (flags & 0x80) //streamDependenceFlag

  429.          avio_rb16(pb);

  430.      if (flags & 0x40) { //URL_Flag

  431.          int len = avio_r8(pb);

  432.          avio_skip(pb, len);

  433.      }

  434.      if (flags & 0x20) //OCRstreamFlag

  435.          avio_rb16(pb);

  436. }

  437. 

  438. static const AVCodecTag mp4_audio_types[] = {

  439.     { AV_CODEC_ID_MP3ON4, AOT_PS   }, /* old mp3on4 draft */

  440.     { AV_CODEC_ID_MP3ON4, AOT_L1   }, /* layer 1 */

  441.     { AV_CODEC_ID_MP3ON4, AOT_L2   }, /* layer 2 */

  442.     { AV_CODEC_ID_MP3ON4, AOT_L3   }, /* layer 3 */

  443.     { AV_CODEC_ID_MP4ALS, AOT_ALS  }, /* MPEG-4 ALS */

  444.     { AV_CODEC_ID_NONE,   AOT_NULL },

  445. };

  446. 

  447. int ff_mp4_read_dec_config_descr(AVFormatContext *fc, AVStream *st, AVIOContext *pb)

  448. {

  449.     enum AVCodecID codec_id;

  450.     int len, tag;

  451.     int ret;

  452.     int object_type_id = avio_r8(pb);

  453.     avio_r8(pb); /* stream type */

  454.     avio_rb24(pb); /* buffer size db */

  455.     avio_rb32(pb); /* max bitrate */

  456.     avio_rb32(pb); /* avg bitrate */

  457. 

  458.     if(avcodec_is_open(st->codec)) {

  459.         av_log(fc, AV_LOG_DEBUG, "codec open in read_dec_config_descr\n");

  460.         return -1;

  461.     }

  462. 

  463.     codec_id= ff_codec_get_id(ff_mp4_obj_type, object_type_id);

  464.     if (codec_id)

  465.         st->codec->codec_id= codec_id;

  466.     av_log(fc, AV_LOG_TRACE, "esds object type id 0x%02x\n", object_type_id);

  467.     len = ff_mp4_read_descr(fc, pb, &tag);

  468.     if (tag == MP4DecSpecificDescrTag) {

  469.         av_log(fc, AV_LOG_TRACE, "Specific MPEG4 header len=%d\n", len);

  470.         if (!len || (uint64_t)len > (1<<30))

  471.             return -1;

  472.         av_free(st->codec->extradata);

  473.         if ((ret = ff_get_extradata(st->codec, pb, len)) < 0)

  474.             return ret;

  475.         if (st->codec->codec_id == AV_CODEC_ID_AAC) {

  476.             MPEG4AudioConfig cfg = {0};

  477.             avpriv_mpeg4audio_get_config(&cfg, st->codec->extradata,

  478.                                          st->codec->extradata_size * 8, 1);

  479.             st->codec->channels = cfg.channels;

  480.             if (cfg.object_type == 29 && cfg.sampling_index < 3) // old mp3on4

  481.                 st->codec->sample_rate = avpriv_mpa_freq_tab[cfg.sampling_index];

  482.             else if (cfg.ext_sample_rate)

  483.                 st->codec->sample_rate = cfg.ext_sample_rate;

  484.             else

  485.                 st->codec->sample_rate = cfg.sample_rate;

  486.             av_log(fc, AV_LOG_TRACE, "mp4a config channels %d obj %d ext obj %d "

  487.                     "sample rate %d ext sample rate %d\n", st->codec->channels,

  488.                     cfg.object_type, cfg.ext_object_type,

  489.                     cfg.sample_rate, cfg.ext_sample_rate);

  490.             if (!(st->codec->codec_id = ff_codec_get_id(mp4_audio_types,

  491.                                                         cfg.object_type)))

  492.                 st->codec->codec_id = AV_CODEC_ID_AAC;

  493.         }

  494.     }

  495.     return 0;

  496. }

  497. 

  498. typedef struct MovChannelLayout {

  499.     int64_t  channel_layout;

  500.     uint32_t layout_tag;

  501. } MovChannelLayout;

  502. 

  503. static const MovChannelLayout mov_channel_layout[] = {

  504.     { AV_CH_LAYOUT_MONO,                         (100<<16) | 1}, // kCAFChannelLayoutTag_Mono

  505.     { AV_CH_LAYOUT_STEREO,                       (101<<16) | 2}, // kCAFChannelLayoutTag_Stereo

  506.     { AV_CH_LAYOUT_STEREO,                       (102<<16) | 2}, // kCAFChannelLayoutTag_StereoHeadphones

  507.     { AV_CH_LAYOUT_2_1,                          (131<<16) | 3}, // kCAFChannelLayoutTag_ITU_2_1

  508.     { AV_CH_LAYOUT_QUAD,                         (132<<16) | 4}, // kCAFChannelLayoutTag_ITU_2_2

  509.     { AV_CH_LAYOUT_2_2,                          (132<<16) | 4}, // kCAFChannelLayoutTag_ITU_2_2

  510.     { AV_CH_LAYOUT_QUAD,                         (108<<16) | 4}, // kCAFChannelLayoutTag_Quadraphonic

  511.     { AV_CH_LAYOUT_SURROUND,                     (113<<16) | 3}, // kCAFChannelLayoutTag_MPEG_3_0_A

  512.     { AV_CH_LAYOUT_4POINT0,                      (115<<16) | 4}, // kCAFChannelLayoutTag_MPEG_4_0_A

  513.     { AV_CH_LAYOUT_5POINT0_BACK,                 (117<<16) | 5}, // kCAFChannelLayoutTag_MPEG_5_0_A

  514.     { AV_CH_LAYOUT_5POINT0,                      (117<<16) | 5}, // kCAFChannelLayoutTag_MPEG_5_0_A

  515.     { AV_CH_LAYOUT_5POINT1_BACK,                 (121<<16) | 6}, // kCAFChannelLayoutTag_MPEG_5_1_A

  516.     { AV_CH_LAYOUT_5POINT1,                      (121<<16) | 6}, // kCAFChannelLayoutTag_MPEG_5_1_A

  517.     { AV_CH_LAYOUT_7POINT1,                      (128<<16) | 8}, // kCAFChannelLayoutTag_MPEG_7_1_C

  518.     { AV_CH_LAYOUT_7POINT1_WIDE,                 (126<<16) | 8}, // kCAFChannelLayoutTag_MPEG_7_1_A

  519.     { AV_CH_LAYOUT_5POINT1_BACK|AV_CH_LAYOUT_STEREO_DOWNMIX, (130<<16) | 8}, // kCAFChannelLayoutTag_SMPTE_DTV

  520.     { AV_CH_LAYOUT_STEREO|AV_CH_LOW_FREQUENCY,   (133<<16) | 3}, // kCAFChannelLayoutTag_DVD_4

  521.     { AV_CH_LAYOUT_2_1|AV_CH_LOW_FREQUENCY,      (134<<16) | 4}, // kCAFChannelLayoutTag_DVD_5

  522.     { AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY,     (135<<16) | 4}, // kCAFChannelLayoutTag_DVD_6

  523.     { AV_CH_LAYOUT_2_2|AV_CH_LOW_FREQUENCY,      (135<<16) | 4}, // kCAFChannelLayoutTag_DVD_6

  524.     { AV_CH_LAYOUT_SURROUND|AV_CH_LOW_FREQUENCY, (136<<16) | 4}, // kCAFChannelLayoutTag_DVD_10

  525.     { AV_CH_LAYOUT_4POINT0|AV_CH_LOW_FREQUENCY,  (137<<16) | 5}, // kCAFChannelLayoutTag_DVD_11

  526.     { 0, 0},

  527. };

  528. #if 0

  529. int ff_mov_read_chan(AVFormatContext *s, AVStream *st, int64_t size)

  530. {

  531.     AVCodecContext *codec= st->codec;

  532.     uint32_t layout_tag;

  533.     AVIOContext *pb = s->pb;

  534.     const MovChannelLayout *layouts = mov_channel_layout;

  535. 

  536.     if (size < 12)

  537.         return AVERROR_INVALIDDATA;

  538. 

  539.     layout_tag = avio_rb32(pb);

  540.     size -= 4;

  541.     if (layout_tag == 0) { // kCAFChannelLayoutTag_UseChannelDescriptions

  542.         // Channel descriptions not implemented

  543.         av_log_ask_for_sample(s, "Unimplemented container channel layout.\n");

  544.         avio_skip(pb, size);

  545.         return 0;

  546.     }

  547.     if (layout_tag == 0x10000) { // kCAFChannelLayoutTag_UseChannelBitmap

  548.         codec->channel_layout = avio_rb32(pb);

  549.         size -= 4;

  550.         avio_skip(pb, size);

  551.         return 0;

  552.     }

  553.     while (layouts->channel_layout) {

  554.         if (layout_tag == layouts->layout_tag) {

  555.             codec->channel_layout = layouts->channel_layout;

  556.             break;

  557.         }

  558.         layouts++;

  559.     }

  560.     if (!codec->channel_layout)

  561.         av_log(s, AV_LOG_WARNING, "Unknown container channel layout.\n");

  562.     avio_skip(pb, size);

  563. 

  564.     return 0;

  565. }

  566. #endif

  567. 

  568. void ff_mov_write_chan(AVIOContext *pb, int64_t channel_layout)

  569. {

  570.     const MovChannelLayout *layouts;

  571.     uint32_t layout_tag = 0;

  572. 

  573.     for (layouts = mov_channel_layout; layouts->channel_layout; layouts++)

  574.         if (channel_layout == layouts->channel_layout) {

  575.             layout_tag = layouts->layout_tag;

  576.             break;

  577.         }

  578. 

  579.     if (layout_tag) {

  580.         avio_wb32(pb, layout_tag); // mChannelLayoutTag

  581.         avio_wb32(pb, 0);          // mChannelBitmap

  582.     } else {

  583.         avio_wb32(pb, 0x10000);    // kCAFChannelLayoutTag_UseChannelBitmap

  584.         avio_wb32(pb, channel_layout);

  585.     }

  586.     avio_wb32(pb, 0);              // mNumberChannelDescriptions

  587. }

  588. 

  589. const struct AVCodecTag *avformat_get_mov_video_tags(void)

  590. {

  591.     return ff_codec_movvideo_tags;

  592. }

  593. 

  594. const struct AVCodecTag *avformat_get_mov_audio_tags(void)

  595. {

  596.     return ff_codec_movaudio_tags;

  597. }