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FFmpeg/libavformat/mov.c

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  1. /*

  2.  * MOV decoder.

  3.  * Copyright (c) 2001 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

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

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

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

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

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

  13.  * Lesser General Public License for more details.

  14.  *

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

  16.  * License along with this library; if not, write to the Free Software

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

  18.  */

  19. 

  20. #include <limits.h>

  21. 

  22. //#define DEBUG

  23. 

  24. #include "avformat.h"

  25. #include "avi.h"

  26. #include "mov.h"

  27. 

  28. #ifdef CONFIG_ZLIB

  29. #include <zlib.h>

  30. #endif

  31. 

  32. /*

  33.  * First version by Francois Revol revol@free.fr

  34.  * Seek function by Gael Chardon gael.dev@4now.net

  35.  *

  36.  * Features and limitations:

  37.  * - reads most of the QT files I have (at least the structure),

  38.  *   the exceptions are .mov with zlib compressed headers ('cmov' section). It shouldn't be hard to implement.

  39.  *   FIXED, Francois Revol, 07/17/2002

  40.  * - ffmpeg has nearly none of the usual QuickTime codecs,

  41.  *   although I succesfully dumped raw and mp3 audio tracks off .mov files.

  42.  *   Sample QuickTime files with mp3 audio can be found at: http://www.3ivx.com/showcase.html

  43.  * - .mp4 parsing is still hazardous, although the format really is QuickTime with some minor changes

  44.  *   (to make .mov parser crash maybe ?), despite what they say in the MPEG FAQ at

  45.  *   http://mpeg.telecomitalialab.com/faq.htm

  46.  * - the code is quite ugly... maybe I won't do it recursive next time :-)

  47.  * - seek is not supported with files that contain edit list

  48.  *

  49.  * Funny I didn't know about http://sourceforge.net/projects/qt-ffmpeg/

  50.  * when coding this :) (it's a writer anyway)

  51.  *

  52.  * Reference documents:

  53.  * http://www.geocities.com/xhelmboyx/quicktime/formats/qtm-layout.txt

  54.  * Apple:

  55.  *  http://developer.apple.com/documentation/QuickTime/QTFF/

  56.  *  http://developer.apple.com/documentation/QuickTime/QTFF/qtff.pdf

  57.  * QuickTime is a trademark of Apple (AFAIK :))

  58.  */

  59. 

  60. #include "qtpalette.h"

  61. 

  62. 

  63. #undef NDEBUG

  64. #include <assert.h>

  65. 

  66. /* Allows seeking */

  67. #define MOV_SEEK

  68. 

  69. /* Special handling for movies created with Minolta Dimaxe Xi*/

  70. /* this fix should not interfere with other .mov files, but just in case*/

  71. #define MOV_MINOLTA_FIX

  72. 

  73. /* some streams in QT (and in MP4 mostly) aren't either video nor audio */

  74. /* so we first list them as this, then clean up the list of streams we give back, */

  75. /* getting rid of these */

  76. #define CODEC_TYPE_MOV_OTHER    (enum CodecType) 2

  77. 

  78. /* http://gpac.sourceforge.net/tutorial/mediatypes.htm */

  79. const CodecTag ff_mov_obj_type[] = {

  80.     { CODEC_ID_MPEG4     ,  32 },

  81.     { CODEC_ID_H264      ,  33 },

  82.     { CODEC_ID_AAC       ,  64 },

  83.     { CODEC_ID_MPEG2VIDEO,  96 }, /* MPEG2 Simple */

  84.     { CODEC_ID_MPEG2VIDEO,  97 }, /* MPEG2 Main */

  85.     { CODEC_ID_MPEG2VIDEO,  98 }, /* MPEG2 SNR */

  86.     { CODEC_ID_MPEG2VIDEO,  99 }, /* MPEG2 Spatial */

  87.     { CODEC_ID_MPEG2VIDEO, 100 }, /* MPEG2 High */

  88.     { CODEC_ID_MPEG2VIDEO, 101 }, /* MPEG2 422 */

  89.     { CODEC_ID_AAC       , 102 }, /* MPEG2 AAC Main */

  90.     { CODEC_ID_AAC       , 103 }, /* MPEG2 AAC Low */

  91.     { CODEC_ID_AAC       , 104 }, /* MPEG2 AAC SSR */

  92.     { CODEC_ID_MP3       , 105 },

  93.     { CODEC_ID_MPEG1VIDEO, 106 },

  94.     { CODEC_ID_MP2       , 107 },

  95.     { CODEC_ID_MJPEG     , 108 },

  96.     { CODEC_ID_PCM_S16LE , 224 },

  97.     { CODEC_ID_VORBIS    , 225 },

  98.     { CODEC_ID_AC3       , 226 },

  99.     { CODEC_ID_PCM_ALAW  , 227 },

  100.     { CODEC_ID_PCM_MULAW , 228 },

  101.     { CODEC_ID_PCM_S16BE , 230 },

  102.     { CODEC_ID_H263      , 242 },

  103.     { CODEC_ID_H261      , 243 },

  104.     { 0, 0 },

  105. };

  106. 

  107. static const CodecTag mov_video_tags[] = {

  108. /*  { CODEC_ID_, MKTAG('c', 'v', 'i', 'd') }, *//* Cinepak */

  109. /*  { CODEC_ID_H263, MKTAG('r', 'a', 'w', ' ') }, *//* Uncompressed RGB */

  110. /*  { CODEC_ID_H263, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */

  111. /*    { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, *//* YUV with alpha-channel (AVID Uncompressed) */

  112. /* Graphics */

  113. /* Animation */

  114. /* Apple video */

  115. /* Kodak Photo CD */

  116.     { CODEC_ID_MJPEG, MKTAG('j', 'p', 'e', 'g') }, /* PhotoJPEG */

  117.     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'e', 'g') }, /* MPEG */

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

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

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

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

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

  123. /* Sorenson video */

  124.     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') }, /* Sorenson Video v1 */

  125.     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', '1') }, /* Sorenson Video v1 */

  126.     { CODEC_ID_SVQ1, MKTAG('s', 'v', 'q', 'i') }, /* Sorenson Video v1 (from QT specs)*/

  127.     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') }, /* Sorenson Video v3 */

  128.     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },

  129.     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') }, /* OpenDiVX *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */

  130.     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },

  131.     { CODEC_ID_MPEG4, MKTAG('3', 'I', 'V', '2') }, /* experimental: 3IVX files before ivx D4 4.5.1 */

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

  133.     { CODEC_ID_H263, MKTAG('h', '2', '6', '3') }, /* H263 */

  134.     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') }, /* H263 ?? works */

  135.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') }, /* DV NTSC */

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

  137. /*    { CODEC_ID_DVVIDEO, MKTAG('A', 'V', 'd', 'v') }, *//* AVID dv */

  138.     { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') }, /* On2 VP3 */

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

  140.     { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') }, /* Cinepak */

  141.     { CODEC_ID_8BPS, MKTAG('8', 'B', 'P', 'S') }, /* Planar RGB (8BPS) */

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

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

  144.     { CODEC_ID_QDRAW, MKTAG('q', 'd', 'r', 'w') }, /* QuickDraw */

  145.     { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') }, /* AVC-1/H.264 */

  146.     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '2') }, /* MPEG2 produced by Sony HD camera */

  147.     { CODEC_ID_MPEG2VIDEO, MKTAG('h', 'd', 'v', '3') }, /* HDV produced by FCP */

  148.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'n') }, /* MPEG2 IMX NTSC 525/60 50mb/s produced by FCP */

  149.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '5', 'p') }, /* MPEG2 IMX PAL 625/50 50mb/s produced by FCP */

  150.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'n') }, /* MPEG2 IMX NTSC 525/60 30mb/s produced by FCP */

  151.     { CODEC_ID_MPEG2VIDEO, MKTAG('m', 'x', '3', 'p') }, /* MPEG2 IMX PAL 625/50 30mb/s produced by FCP */

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

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

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

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

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

  157.     //{ CODEC_ID_JPEG2000, MKTAG('m', 'j', 'p', '2') }, /* JPEG 2000 produced by FCP */

  158.     { CODEC_ID_NONE, 0 },

  159. };

  160. 

  161. static const CodecTag mov_audio_tags[] = {

  162.     { CODEC_ID_PCM_S32BE, MKTAG('i', 'n', '3', '2') },

  163.     { CODEC_ID_PCM_S24BE, MKTAG('i', 'n', '2', '4') },

  164. /*    { CODEC_ID_PCM_S16BE, MKTAG('N', 'O', 'N', 'E') }, *//* uncompressed */

  165.     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') }, /* 16 bits */

  166.     /* { CODEC_ID_PCM_S8, MKTAG('t', 'w', 'o', 's') },*/ /* 8 bits */

  167.     { CODEC_ID_PCM_U8, MKTAG('r', 'a', 'w', ' ') }, /* 8 bits unsigned */

  168.     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') }, /*  */

  169.     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') }, /*  */

  170.     { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') }, /*  */

  171.     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') }, /* IMA-4 ADPCM */

  172.     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') }, /* Macintosh Audio Compression and Expansion 3:1 */

  173.     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') }, /* Macintosh Audio Compression and Expansion 6:1 */

  174. 

  175.     { CODEC_ID_MP2, MKTAG('.', 'm', 'p', '3') }, /* MPEG layer 3 */ /* sample files at http://www.3ivx.com/showcase.html use this tag */

  176.     { CODEC_ID_MP2, 0x6D730055 }, /* MPEG layer 3 */

  177.     { CODEC_ID_MP2, 0x5500736D }, /* MPEG layer 3 *//* XXX: check endianness */

  178. /*    { CODEC_ID_OGG_VORBIS, MKTAG('O', 'g', 'g', 'S') }, *//* sample files at http://heroinewarrior.com/xmovie.php3 use this tag */

  179. /* MP4 tags */

  180.     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, /* MPEG-4 AAC */

  181.     /* The standard for mpeg4 audio is still not normalised AFAIK anyway */

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

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

  184.     { CODEC_ID_AC3, MKTAG('m', 's', 0x20, 0x00) }, /* Dolby AC-3 */

  185.     { CODEC_ID_ALAC,MKTAG('a', 'l', 'a', 'c') }, /* Apple Lossless */

  186.     { CODEC_ID_QDM2,MKTAG('Q', 'D', 'M', '2') }, /* QDM2 */

  187.     { CODEC_ID_NONE, 0 },

  188. };

  189. 

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

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

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

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

  194. static const char *mov_mdhd_language_map[] = {

  195. /* 0-9 */

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

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

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

  199. "fo ",  NULL, "rus", "chi",  NULL, "iri", "alb", "ron", "ces", "slk",

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

  201. /*?*/

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

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

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

  205. /*                   roman? arabic? */

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

  207. /*==rundi?*/

  208.  NULL, "run",  NULL, "mlg", "epo",  NULL,  NULL,  NULL,  NULL,  NULL,

  209. /* 100 */

  210.  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,

  211.  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,

  212.  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL,  NULL, "wel", "baq",

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

  214. };

  215. 

  216. /* the QuickTime file format is quite convoluted...

  217.  * it has lots of index tables, each indexing something in another one...

  218.  * Here we just use what is needed to read the chunks

  219.  */

  220. 

  221. typedef struct MOV_sample_to_chunk_tbl {

  222.     long first;

  223.     long count;

  224.     long id;

  225. } MOV_sample_to_chunk_tbl;

  226. 

  227. typedef struct {

  228.     uint32_t type;

  229.     int64_t offset;

  230.     int64_t size; /* total size (excluding the size and type fields) */

  231. } MOV_atom_t;

  232. 

  233. typedef struct {

  234.     int seed;

  235.     int flags;

  236.     int size;

  237.     void* clrs;

  238. } MOV_ctab_t;

  239. 

  240. typedef struct {

  241.     uint8_t  version;

  242.     uint32_t flags; // 24bit

  243. 

  244.     /* 0x03 ESDescrTag */

  245.     uint16_t es_id;

  246. #define MP4ODescrTag                    0x01

  247. #define MP4IODescrTag                   0x02

  248. #define MP4ESDescrTag                   0x03

  249. #define MP4DecConfigDescrTag            0x04

  250. #define MP4DecSpecificDescrTag          0x05

  251. #define MP4SLConfigDescrTag             0x06

  252. #define MP4ContentIdDescrTag            0x07

  253. #define MP4SupplContentIdDescrTag       0x08

  254. #define MP4IPIPtrDescrTag               0x09

  255. #define MP4IPMPPtrDescrTag              0x0A

  256. #define MP4IPMPDescrTag                 0x0B

  257. #define MP4RegistrationDescrTag         0x0D

  258. #define MP4ESIDIncDescrTag              0x0E

  259. #define MP4ESIDRefDescrTag              0x0F

  260. #define MP4FileIODescrTag               0x10

  261. #define MP4FileODescrTag                0x11

  262. #define MP4ExtProfileLevelDescrTag      0x13

  263. #define MP4ExtDescrTagsStart            0x80

  264. #define MP4ExtDescrTagsEnd              0xFE

  265.     uint8_t  stream_priority;

  266. 

  267.     /* 0x04 DecConfigDescrTag */

  268.     uint8_t  object_type_id;

  269.     uint8_t  stream_type;

  270.     /* XXX: really streamType is

  271.      * only 6bit, followed by:

  272.      * 1bit  upStream

  273.      * 1bit  reserved

  274.      */

  275.     uint32_t buffer_size_db; // 24

  276.     uint32_t max_bitrate;

  277.     uint32_t avg_bitrate;

  278. 

  279.     /* 0x05 DecSpecificDescrTag */

  280.     uint8_t  decoder_cfg_len;

  281.     uint8_t *decoder_cfg;

  282. 

  283.     /* 0x06 SLConfigDescrTag */

  284.     uint8_t  sl_config_len;

  285.     uint8_t *sl_config;

  286. } MOV_esds_t;

  287. 

  288. struct MOVParseTableEntry;

  289. 

  290. typedef struct MOVStreamContext {

  291.     int ffindex; /* the ffmpeg stream id */

  292.     int is_ff_stream; /* Is this stream presented to ffmpeg ? i.e. is this an audio or video stream ? */

  293.     long next_chunk;

  294.     long chunk_count;

  295.     int64_t *chunk_offsets;

  296.     int stts_count;

  297.     Time2Sample *stts_data;

  298.     int ctts_count;

  299.     Time2Sample *ctts_data;

  300.     int edit_count;             /* number of 'edit' (elst atom) */

  301.     long sample_to_chunk_sz;

  302.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  303.     long sample_to_chunk_index;

  304.     int sample_to_time_index;

  305.     long sample_to_time_sample;

  306.     uint64_t sample_to_time_time;

  307.     int sample_to_ctime_index;

  308.     int sample_to_ctime_sample;

  309.     long sample_size;

  310.     long sample_count;

  311.     long *sample_sizes;

  312.     long keyframe_count;

  313.     long *keyframes;

  314.     int time_scale;

  315.     int time_rate;

  316.     long current_sample;

  317.     long left_in_chunk; /* how many samples before next chunk */

  318.     MOV_esds_t esds;

  319. } MOVStreamContext;

  320. 

  321. typedef struct MOVContext {

  322.     int mp4; /* set to 1 as soon as we are sure that the file is an .mp4 file (even some header parsing depends on this) */

  323.     AVFormatContext *fc;

  324.     int time_scale;

  325.     int duration; /* duration of the longest track */

  326.     int found_moov; /* when both 'moov' and 'mdat' sections has been found */

  327.     int found_mdat; /* we suppose we have enough data to read the file */

  328.     int64_t mdat_size;

  329.     int64_t mdat_offset;

  330.     int ni;                                         ///< non interleaved mode

  331.     int total_streams;

  332.     /* some streams listed here aren't presented to the ffmpeg API, since they aren't either video nor audio

  333.      * but we need the info to be able to skip data from those streams in the 'mdat' section

  334.      */

  335.     MOVStreamContext *streams[MAX_STREAMS];

  336. 

  337.     int64_t next_chunk_offset;

  338.     MOVStreamContext *partial; /* != 0 : there is still to read in the current chunk */

  339.     int ctab_size;

  340.     MOV_ctab_t **ctab;           /* color tables */

  341.     const struct MOVParseTableEntry *parse_table; /* could be eventually used to change the table */

  342.     /* NOTE: for recursion save to/ restore from local variable! */

  343. 

  344.     AVPaletteControl palette_control;

  345. } MOVContext;

  346. 

  347. 

  348. /* XXX: it's the first time I make a recursive parser I think... sorry if it's ugly :P */

  349. 

  350. /* those functions parse an atom */

  351. /* return code:

  352.  1: found what I wanted, exit

  353.  0: continue to parse next atom

  354.  -1: error occured, exit

  355.  */

  356. typedef int (*mov_parse_function)(MOVContext *ctx, ByteIOContext *pb, MOV_atom_t atom);

  357. 

  358. /* links atom IDs to parse functions */

  359. typedef struct MOVParseTableEntry {

  360.     uint32_t type;

  361.     mov_parse_function func;

  362. } MOVParseTableEntry;

  363. 

  364. static int ff_mov_lang_to_iso639(int code, char *to)

  365. {

  366.     int i;

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

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

  369.     if (code > 138) {

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

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

  372.             code >>= 5;

  373.         }

  374.         return 1;

  375.     }

  376.     /* old fashion apple lang code */

  377.     if (code >= (sizeof(mov_mdhd_language_map)/sizeof(char *)))

  378.         return 0;

  379.     if (!mov_mdhd_language_map[code])

  380.         return 0;

  381.     strncpy(to, mov_mdhd_language_map[code], 4);

  382.     return 1;

  383. }

  384. 

  385. extern int ff_mov_iso639_to_lang(const char *lang, int mp4); /* for movenc.c */

  386. int ff_mov_iso639_to_lang(const char *lang, int mp4)

  387. {

  388.     int i, code = 0;

  389. 

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

  391.     for (i = 0; !mp4 && (i < (sizeof(mov_mdhd_language_map)/sizeof(char *))); i++) {

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

  393.             return i;

  394.     }

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

  396.     if (!mp4)

  397.         return 0;

  398.     /* handle undefined as such */

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

  400.         lang = "und";

  401.     /* 5bit ascii */

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

  403.         unsigned char c = (unsigned char)lang[i];

  404.         if (c < 0x60)

  405.             return 0;

  406.         if (c > 0x60 + 0x1f)

  407.             return 0;

  408.         code <<= 5;

  409.         code |= (c - 0x60);

  410.     }

  411.     return code;

  412. }

  413. 

  414. static int mov_read_leaf(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  415. {

  416.     if (atom.size>1)

  417.         url_fskip(pb, atom.size);

  418. /*        url_seek(pb, atom_offset+atom.size, SEEK_SET); */

  419.     return 0;

  420. }

  421. 

  422. static int mov_read_default(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  423. {

  424.     int64_t total_size = 0;

  425.     MOV_atom_t a;

  426.     int i;

  427.     int err = 0;

  428. 

  429.     a.offset = atom.offset;

  430. 

  431.     if (atom.size < 0)

  432.         atom.size = 0x7fffffffffffffffLL;

  433.     while(((total_size + 8) < atom.size) && !url_feof(pb) && !err) {

  434.         a.size = atom.size;

  435.         a.type=0L;

  436.         if(atom.size >= 8) {

  437.             a.size = get_be32(pb);

  438.             a.type = get_le32(pb);

  439.         }

  440.         total_size += 8;

  441.         a.offset += 8;

  442.         dprintf("type: %08x  %.4s  sz: %"PRIx64"  %"PRIx64"   %"PRIx64"\n", a.type, (char*)&a.type, a.size, atom.size, total_size);

  443.         if (a.size == 1) { /* 64 bit extended size */

  444.             a.size = get_be64(pb) - 8;

  445.             a.offset += 8;

  446.             total_size += 8;

  447.         }

  448.         if (a.size == 0) {

  449.             a.size = atom.size - total_size;

  450.             if (a.size <= 8)

  451.                 break;

  452.         }

  453.         for (i = 0; c->parse_table[i].type != 0L

  454.              && c->parse_table[i].type != a.type; i++)

  455.             /* empty */;

  456. 

  457.         a.size -= 8;

  458. 

  459.         if(a.size < 0)

  460.             break;

  461. 

  462.         if (c->parse_table[i].type == 0) { /* skip leaf atoms data */

  463.             url_fskip(pb, a.size);

  464.         } else {

  465.             err = (c->parse_table[i].func)(c, pb, a);

  466.         }

  467. 

  468.         a.offset += a.size;

  469.         total_size += a.size;

  470.     }

  471. 

  472.     if (!err && total_size < atom.size && atom.size < 0x7ffff) {

  473.         url_fskip(pb, atom.size - total_size);

  474.     }

  475. 

  476.     return err;

  477. }

  478. 

  479. static int mov_read_ctab(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  480. {

  481. #if 1

  482.     url_fskip(pb, atom.size); // for now

  483. #else

  484.     VERY VERY BROKEN, NEVER execute this, needs rewrite

  485.     unsigned int len;

  486.     MOV_ctab_t *t;

  487.     c->ctab = av_realloc(c->ctab, ++c->ctab_size);

  488.     t = c->ctab[c->ctab_size];

  489.     t->seed = get_be32(pb);

  490.     t->flags = get_be16(pb);

  491.     t->size = get_be16(pb) + 1;

  492.     len = 2 * t->size * 4;

  493.     if (len > 0) {

  494.         t->clrs = av_malloc(len); // 16bit A R G B

  495.         if (t->clrs)

  496.             get_buffer(pb, t->clrs, len);

  497.     }

  498. #endif

  499. 

  500.     return 0;

  501. }

  502. 

  503. static int mov_read_hdlr(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  504. {

  505.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  506.     int len = 0;

  507.     uint32_t type;

  508.     uint32_t ctype;

  509. 

  510.     get_byte(pb); /* version */

  511.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  512. 

  513.     /* component type */

  514.     ctype = get_le32(pb);

  515.     type = get_le32(pb); /* component subtype */

  516. 

  517.     dprintf("ctype= %c%c%c%c (0x%08lx)\n", *((char *)&ctype), ((char *)&ctype)[1], ((char *)&ctype)[2], ((char *)&ctype)[3], (long) ctype);

  518.     dprintf("stype= %c%c%c%c\n", *((char *)&type), ((char *)&type)[1], ((char *)&type)[2], ((char *)&type)[3]);

  519.     if(ctype == MKTAG('m', 'h', 'l', 'r')) /* MOV */

  520.         c->mp4 = 0;

  521.     else if(ctype == 0)

  522.         c->mp4 = 1;

  523.     if(type == MKTAG('v', 'i', 'd', 'e'))

  524.         st->codec->codec_type = CODEC_TYPE_VIDEO;

  525.     else if(type == MKTAG('s', 'o', 'u', 'n'))

  526.         st->codec->codec_type = CODEC_TYPE_AUDIO;

  527.     get_be32(pb); /* component  manufacture */

  528.     get_be32(pb); /* component flags */

  529.     get_be32(pb); /* component flags mask */

  530. 

  531.     if(atom.size <= 24)

  532.         return 0; /* nothing left to read */

  533.     /* XXX: MP4 uses a C string, not a pascal one */

  534.     /* component name */

  535. 

  536.     if(c->mp4) {

  537.         /* .mp4: C string */

  538.         while(get_byte(pb) && (++len < (atom.size - 24)));

  539.     } else {

  540.         /* .mov: PASCAL string */

  541.         len = get_byte(pb);

  542.         url_fskip(pb, len);

  543.     }

  544. 

  545.     url_fskip(pb, atom.size - (url_ftell(pb) - atom.offset));

  546.     return 0;

  547. }

  548. 

  549. static int mov_mp4_read_descr_len(ByteIOContext *pb)

  550. {

  551.     int len = 0;

  552.     int count = 4;

  553.     while (count--) {

  554.         int c = get_byte(pb);

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

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

  557.             break;

  558.     }

  559.     return len;

  560. }

  561. 

  562. static int mov_mp4_read_descr(ByteIOContext *pb, int *tag)

  563. {

  564.     int len;

  565.     *tag = get_byte(pb);

  566.     len = mov_mp4_read_descr_len(pb);

  567.     dprintf("MPEG4 description: tag=0x%02x len=%d\n", *tag, len);

  568.     return len;

  569. }

  570. 

  571. static int mov_read_esds(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  572. {

  573.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  574.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  575.     int64_t start_pos = url_ftell(pb);

  576.     int tag, len;

  577. 

  578.     /* Well, broken but suffisant for some MP4 streams */

  579.     get_be32(pb); /* version + flags */

  580.     len = mov_mp4_read_descr(pb, &tag);

  581.     if (tag == MP4ESDescrTag) {

  582.         get_be16(pb); /* ID */

  583.         get_byte(pb); /* priority */

  584.     } else

  585.         get_be16(pb); /* ID */

  586. 

  587.     len = mov_mp4_read_descr(pb, &tag);

  588.     if (tag == MP4DecConfigDescrTag) {

  589.         sc->esds.object_type_id = get_byte(pb);

  590.         sc->esds.stream_type = get_byte(pb);

  591.         sc->esds.buffer_size_db = get_be24(pb);

  592.         sc->esds.max_bitrate = get_be32(pb);

  593.         sc->esds.avg_bitrate = get_be32(pb);

  594. 

  595.         st->codec->codec_id= codec_get_id(ff_mov_obj_type, sc->esds.object_type_id);

  596.         len = mov_mp4_read_descr(pb, &tag);

  597.         if (tag == MP4DecSpecificDescrTag) {

  598.             dprintf("Specific MPEG4 header len=%d\n", len);

  599.             st->codec->extradata = (uint8_t*) av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE);

  600.             if (st->codec->extradata) {

  601.                 get_buffer(pb, st->codec->extradata, len);

  602.                 st->codec->extradata_size = len;

  603.             }

  604.         }

  605.     }

  606.     /* in any case, skip garbage */

  607.     url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));

  608.     return 0;

  609. }

  610. 

  611. /* this atom contains actual media data */

  612. static int mov_read_mdat(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  613. {

  614.     if(atom.size == 0) /* wrong one (MP4) */

  615.         return 0;

  616.     c->found_mdat=1;

  617.     c->mdat_offset = atom.offset;

  618.     c->mdat_size = atom.size;

  619.     if(c->found_moov)

  620.         return 1; /* found both, just go */

  621.     url_fskip(pb, atom.size);

  622.     return 0; /* now go for moov */

  623. }

  624. 

  625. static int mov_read_ftyp(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  626. {

  627.     uint32_t type = get_le32(pb);

  628. 

  629.     /* from mplayer */

  630.     switch (type) {

  631.     case MKTAG('i', 's', 'o', 'm'):

  632.     case MKTAG('m', 'p', '4', '1'):

  633.     case MKTAG('m', 'p', '4', '2'):

  634.     case MKTAG('3', 'g', 'p', '1'):

  635.     case MKTAG('3', 'g', 'p', '2'):

  636.     case MKTAG('3', 'g', '2', 'a'):

  637.     case MKTAG('3', 'g', 'p', '3'):

  638.     case MKTAG('3', 'g', 'p', '4'):

  639.     case MKTAG('3', 'g', 'p', '5'):

  640.     case MKTAG('m', 'm', 'p', '4'): /* Mobile MP4 */

  641.     case MKTAG('M', '4', 'A', ' '): /* Apple iTunes AAC-LC Audio */

  642.     case MKTAG('M', '4', 'P', ' '): /* Apple iTunes AAC-LC Protected Audio */

  643.     case MKTAG('m', 'j', 'p', '2'): /* Motion Jpeg 2000 */

  644.         c->mp4 = 1;

  645.     case MKTAG('q', 't', ' ', ' '):

  646.     default:

  647.         av_log(c->fc, AV_LOG_DEBUG, "ISO: File Type Major Brand: %.4s\n",(char *)&type);

  648.     }

  649.     get_be32(pb); /* minor version */

  650.     url_fskip(pb, atom.size - 8);

  651.     return 0;

  652. }

  653. 

  654. /* this atom should contain all header atoms */

  655. static int mov_read_moov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  656. {

  657.     int err;

  658. 

  659.     err = mov_read_default(c, pb, atom);

  660.     /* we parsed the 'moov' atom, we can terminate the parsing as soon as we find the 'mdat' */

  661.     /* so we don't parse the whole file if over a network */

  662.     c->found_moov=1;

  663.     if(c->found_mdat)

  664.         return 1; /* found both, just go */

  665.     return 0; /* now go for mdat */

  666. }

  667. 

  668. 

  669. static int mov_read_mdhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  670. {

  671.     int version;

  672.     int lang;

  673. 

  674.     version = get_byte(pb); /* version */

  675.     if (version > 1)

  676.         return 1; /* unsupported */

  677. 

  678.     get_byte(pb); get_byte(pb);

  679.     get_byte(pb); /* flags */

  680. 

  681.     (version==1)?get_be64(pb):get_be32(pb); /* creation time */

  682.     (version==1)?get_be64(pb):get_be32(pb); /* modification time */

  683. 

  684.     c->streams[c->fc->nb_streams-1]->time_scale = get_be32(pb);

  685.     c->fc->streams[c->fc->nb_streams-1]->duration = (version==1)?get_be64(pb):get_be32(pb); /* duration */

  686. 

  687.     lang = get_be16(pb); /* language */

  688.     ff_mov_lang_to_iso639(lang, c->fc->streams[c->fc->nb_streams-1]->language);

  689.     get_be16(pb); /* quality */

  690. 

  691.     return 0;

  692. }

  693. 

  694. static int mov_read_mvhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  695. {

  696.     int version = get_byte(pb); /* version */

  697.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  698. 

  699.     if (version == 1) {

  700.         get_be64(pb);

  701.         get_be64(pb);

  702.     } else {

  703.         get_be32(pb); /* creation time */

  704.         get_be32(pb); /* modification time */

  705.     }

  706.     c->time_scale = get_be32(pb); /* time scale */

  707. #ifdef DEBUG

  708.     av_log(NULL, AV_LOG_DEBUG, "time scale = %i\n", c->time_scale);

  709. #endif

  710.     c->duration = (version == 1) ? get_be64(pb) : get_be32(pb); /* duration */

  711.     get_be32(pb); /* preferred scale */

  712. 

  713.     get_be16(pb); /* preferred volume */

  714. 

  715.     url_fskip(pb, 10); /* reserved */

  716. 

  717.     url_fskip(pb, 36); /* display matrix */

  718. 

  719.     get_be32(pb); /* preview time */

  720.     get_be32(pb); /* preview duration */

  721.     get_be32(pb); /* poster time */

  722.     get_be32(pb); /* selection time */

  723.     get_be32(pb); /* selection duration */

  724.     get_be32(pb); /* current time */

  725.     get_be32(pb); /* next track ID */

  726. 

  727.     return 0;

  728. }

  729. 

  730. static int mov_read_smi(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  731. {

  732.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  733. 

  734.     if((uint64_t)atom.size > (1<<30))

  735.         return -1;

  736. 

  737.     // currently SVQ3 decoder expect full STSD header - so let's fake it

  738.     // this should be fixed and just SMI header should be passed

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

  740.     st->codec->extradata_size = 0x5a + atom.size;

  741.     st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  742. 

  743.     if (st->codec->extradata) {

  744.         strcpy(st->codec->extradata, "SVQ3"); // fake

  745.         get_buffer(pb, st->codec->extradata + 0x5a, atom.size);

  746.         dprintf("Reading SMI %"PRId64"  %s\n", atom.size, (char*)st->codec->extradata + 0x5a);

  747.     } else

  748.         url_fskip(pb, atom.size);

  749. 

  750.     return 0;

  751. }

  752. 

  753. static int mov_read_enda(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  754. {

  755.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  756.     int little_endian = get_be16(pb);

  757. 

  758.     if (little_endian) {

  759.         switch (st->codec->codec_id) {

  760.         case CODEC_ID_PCM_S24BE:

  761.             st->codec->codec_id = CODEC_ID_PCM_S24LE;

  762.             break;

  763.         case CODEC_ID_PCM_S32BE:

  764.             st->codec->codec_id = CODEC_ID_PCM_S32LE;

  765.             break;

  766.         default:

  767.             break;

  768.         }

  769.     }

  770.     return 0;

  771. }

  772. 

  773. static int mov_read_alac(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  774. {

  775.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  776. 

  777.     // currently ALAC decoder expect full atom header - so let's fake it

  778.     // this should be fixed and just ALAC header should be passed

  779. 

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

  781.     st->codec->extradata_size = 36;

  782.     st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  783. 

  784.     if (st->codec->extradata) {

  785.         strcpy(st->codec->extradata + 4, "alac"); // fake

  786.         get_buffer(pb, st->codec->extradata + 8, 36 - 8);

  787.         dprintf("Reading alac %d  %s\n", st->codec->extradata_size, (char*)st->codec->extradata);

  788.     } else

  789.         url_fskip(pb, atom.size);

  790.     return 0;

  791. }

  792. 

  793. static int mov_read_wave(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  794. {

  795.     offset_t start_pos = url_ftell(pb);

  796.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  797. 

  798.     if((uint64_t)atom.size > (1<<30))

  799.         return -1;

  800. 

  801.     if (st->codec->codec_id == CODEC_ID_QDM2) {

  802.         // pass all frma atom to codec, needed at least for QDM2

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

  804.         st->codec->extradata_size = atom.size;

  805.         st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  806. 

  807.         if (st->codec->extradata) {

  808.             get_buffer(pb, st->codec->extradata, atom.size);

  809.         } else

  810.             url_fskip(pb, atom.size);

  811.     } else if (atom.size > 8) { /* to read frma, esds atoms */

  812.         mov_read_default(c, pb, atom);

  813.     } else if (atom.size > 0)

  814.         url_fskip(pb, atom.size);

  815.     /* in any case, skip garbage */

  816.     url_fskip(pb, atom.size - ((url_ftell(pb) - start_pos)));

  817.     return 0;

  818. }

  819. 

  820. static int mov_read_jp2h(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  821. {

  822.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  823. 

  824.     if((uint64_t)atom.size > (1<<30))

  825.         return -1;

  826. 

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

  828. 

  829.     st->codec->extradata_size = atom.size + 8;

  830.     st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  831. 

  832.     /* pass all jp2h atom to codec */

  833.     if (st->codec->extradata) {

  834.         strcpy(st->codec->extradata + 4, "jp2h");

  835.         get_buffer(pb, st->codec->extradata + 8, atom.size);

  836.     } else

  837.         url_fskip(pb, atom.size);

  838.     return 0;

  839. }

  840. 

  841. static int mov_read_avcC(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  842. {

  843.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  844. 

  845.     if((uint64_t)atom.size > (1<<30))

  846.         return -1;

  847. 

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

  849. 

  850.     st->codec->extradata_size = atom.size;

  851.     st->codec->extradata = (uint8_t*) av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  852. 

  853.     if (st->codec->extradata) {

  854.         get_buffer(pb, st->codec->extradata, atom.size);

  855.     } else

  856.         url_fskip(pb, atom.size);

  857. 

  858.     return 0;

  859. }

  860. 

  861. static int mov_read_stco(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  862. {

  863.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  864.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  865.     unsigned int i, entries;

  866. 

  867.     get_byte(pb); /* version */

  868.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  869. 

  870.     entries = get_be32(pb);

  871. 

  872.     if(entries >= UINT_MAX/sizeof(int64_t))

  873.         return -1;

  874. 

  875.     sc->chunk_count = entries;

  876.     sc->chunk_offsets = (int64_t*) av_malloc(entries * sizeof(int64_t));

  877.     if (!sc->chunk_offsets)

  878.         return -1;

  879.     if (atom.type == MKTAG('s', 't', 'c', 'o')) {

  880.         for(i=0; i<entries; i++) {

  881.             sc->chunk_offsets[i] = get_be32(pb);

  882.         }

  883.     } else if (atom.type == MKTAG('c', 'o', '6', '4')) {

  884.         for(i=0; i<entries; i++) {

  885.             sc->chunk_offsets[i] = get_be64(pb);

  886.         }

  887.     } else

  888.         return -1;

  889. 

  890.     for(i=0; i<c->fc->nb_streams; i++){

  891.         MOVStreamContext *sc2 = (MOVStreamContext *)c->fc->streams[i]->priv_data;

  892.         if(sc2 && sc2->chunk_offsets){

  893.             int64_t first= sc2->chunk_offsets[0];

  894.             int64_t last= sc2->chunk_offsets[sc2->chunk_count-1];

  895.             if(first >= sc->chunk_offsets[entries-1] || last <= sc->chunk_offsets[0])

  896.                 c->ni=1;

  897.         }

  898.     }

  899.     return 0;

  900. }

  901. 

  902. static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  903. {

  904.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  905.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  906.     int entries, frames_per_sample;

  907.     uint32_t format;

  908.     uint8_t codec_name[32];

  909. 

  910.     /* for palette traversal */

  911.     int color_depth;

  912.     int color_start;

  913.     int color_count;

  914.     int color_end;

  915.     int color_index;

  916.     int color_dec;

  917.     int color_greyscale;

  918.     unsigned char *color_table;

  919.     int j;

  920.     unsigned char r, g, b;

  921. 

  922.     get_byte(pb); /* version */

  923.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  924. 

  925.     entries = get_be32(pb);

  926. 

  927.     while(entries--) { //Parsing Sample description table

  928.         enum CodecID id;

  929.         MOV_atom_t a = { 0, 0, 0 };

  930.         offset_t start_pos = url_ftell(pb);

  931.         int size = get_be32(pb); /* size */

  932.         format = get_le32(pb); /* data format */

  933. 

  934.         get_be32(pb); /* reserved */

  935.         get_be16(pb); /* reserved */

  936.         get_be16(pb); /* index */

  937. 

  938.         dprintf("size=%d 4CC= %c%c%c%c codec_type=%d\n",

  939.                 size,

  940.                 (format >> 0) & 0xff, (format >> 8) & 0xff, (format >> 16) & 0xff, (format >> 24) & 0xff,

  941.                 st->codec->codec_type);

  942.         st->codec->codec_tag = format;

  943.         /* codec_type is set earlier by read_hdlr */

  944.         if(st->codec->codec_type==CODEC_TYPE_VIDEO) {

  945.             /* for MPEG4: set codec type by looking for it */

  946.             id = codec_get_id(mov_video_tags, format);

  947.             if(id <= 0)

  948.                 id = codec_get_id(codec_bmp_tags, format);

  949.             st->codec->codec_id = id;

  950.             get_be16(pb); /* version */

  951.             get_be16(pb); /* revision level */

  952.             get_be32(pb); /* vendor */

  953.             get_be32(pb); /* temporal quality */

  954.             get_be32(pb); /* spacial quality */

  955.             if(st->codec->codec_id == CODEC_ID_MPEG4){ //FIXME this is silly

  956.                 get_be16(pb);

  957.                 get_be16(pb);

  958.             }else{

  959.                 st->codec->width = get_be16(pb); /* width */

  960.                 st->codec->height = get_be16(pb); /* height */

  961.             }

  962.             get_be32(pb); /* horiz resolution */

  963.             get_be32(pb); /* vert resolution */

  964.             get_be32(pb); /* data size, always 0 */

  965.             frames_per_sample = get_be16(pb); /* frames per samples */

  966. #ifdef DEBUG

  967.             av_log(NULL, AV_LOG_DEBUG, "frames/samples = %d\n", frames_per_sample);

  968. #endif

  969.             get_buffer(pb, codec_name, 32); /* codec name, pascal string (FIXME: true for mp4?) */

  970.             if (codec_name[0] <= 31) {

  971.                 memcpy(st->codec->codec_name, &codec_name[1],codec_name[0]);

  972.                 st->codec->codec_name[codec_name[0]] = 0;

  973.             }

  974. 

  975.             st->codec->bits_per_sample = get_be16(pb); /* depth */

  976.             st->codec->color_table_id = get_be16(pb); /* colortable id */

  977. 

  978. /*          These are set in mov_read_stts and might already be set!

  979.             st->codec->time_base.den      = 25;

  980.             st->codec->time_base.num = 1;

  981. */

  982. 

  983.             /* figure out the palette situation */

  984.             color_depth = st->codec->bits_per_sample & 0x1F;

  985.             color_greyscale = st->codec->bits_per_sample & 0x20;

  986. 

  987.             /* if the depth is 2, 4, or 8 bpp, file is palettized */

  988.             if ((color_depth == 2) || (color_depth == 4) ||

  989.                 (color_depth == 8)) {

  990. 

  991.                 if (color_greyscale) {

  992. 

  993.                     /* compute the greyscale palette */

  994.                     color_count = 1 << color_depth;

  995.                     color_index = 255;

  996.                     color_dec = 256 / (color_count - 1);

  997.                     for (j = 0; j < color_count; j++) {

  998.                         r = g = b = color_index;

  999.                         c->palette_control.palette[j] =

  1000.                             (r << 16) | (g << 8) | (b);

  1001.                         color_index -= color_dec;

  1002.                         if (color_index < 0)

  1003.                             color_index = 0;

  1004.                     }

  1005. 

  1006.                 } else if (st->codec->color_table_id & 0x08) {

  1007. 

  1008.                     /* if flag bit 3 is set, use the default palette */

  1009.                     color_count = 1 << color_depth;

  1010.                     if (color_depth == 2)

  1011.                         color_table = ff_qt_default_palette_4;

  1012.                     else if (color_depth == 4)

  1013.                         color_table = ff_qt_default_palette_16;

  1014.                     else

  1015.                         color_table = ff_qt_default_palette_256;

  1016. 

  1017.                     for (j = 0; j < color_count; j++) {

  1018.                         r = color_table[j * 4 + 0];

  1019.                         g = color_table[j * 4 + 1];

  1020.                         b = color_table[j * 4 + 2];

  1021.                         c->palette_control.palette[j] =

  1022.                             (r << 16) | (g << 8) | (b);

  1023.                     }

  1024. 

  1025.                 } else {

  1026. 

  1027.                     /* load the palette from the file */

  1028.                     color_start = get_be32(pb);

  1029.                     color_count = get_be16(pb);

  1030.                     color_end = get_be16(pb);

  1031.                     for (j = color_start; j <= color_end; j++) {

  1032.                         /* each R, G, or B component is 16 bits;

  1033.                          * only use the top 8 bits; skip alpha bytes

  1034.                          * up front */

  1035.                         get_byte(pb);

  1036.                         get_byte(pb);

  1037.                         r = get_byte(pb);

  1038.                         get_byte(pb);

  1039.                         g = get_byte(pb);

  1040.                         get_byte(pb);

  1041.                         b = get_byte(pb);

  1042.                         get_byte(pb);

  1043.                         c->palette_control.palette[j] =

  1044.                             (r << 16) | (g << 8) | (b);

  1045.                     }

  1046.                 }

  1047. 

  1048.                 st->codec->palctrl = &c->palette_control;

  1049.                 st->codec->palctrl->palette_changed = 1;

  1050.             } else

  1051.                 st->codec->palctrl = NULL;

  1052.         } else if(st->codec->codec_type==CODEC_TYPE_AUDIO) {

  1053.             uint16_t version = get_be16(pb);

  1054. 

  1055.             st->codec->codec_id = codec_get_id(mov_audio_tags, format);

  1056.             get_be16(pb); /* revision level */

  1057.             get_be32(pb); /* vendor */

  1058. 

  1059.             st->codec->channels = get_be16(pb);             /* channel count */

  1060.             st->codec->bits_per_sample = get_be16(pb);      /* sample size */

  1061.             /* do we need to force to 16 for AMR ? */

  1062. 

  1063.             /* handle specific s8 codec */

  1064.             get_be16(pb); /* compression id = 0*/

  1065.             get_be16(pb); /* packet size = 0 */

  1066. 

  1067.             st->codec->sample_rate = ((get_be32(pb) >> 16));

  1068. 

  1069.             switch (st->codec->codec_id) {

  1070.             case CODEC_ID_PCM_S16BE:

  1071.                 if (st->codec->bits_per_sample == 8)

  1072.                     st->codec->codec_id = CODEC_ID_PCM_S8;

  1073.                 /* fall */

  1074.             case CODEC_ID_PCM_U8:

  1075.                 if (st->codec->bits_per_sample == 16)

  1076.                     st->codec->codec_id = CODEC_ID_PCM_S16BE;

  1077.                 st->codec->bit_rate = st->codec->sample_rate * 8;

  1078.                 break;

  1079.             case CODEC_ID_AMR_WB:

  1080.                 st->codec->sample_rate = 16000; /* should really we ? */

  1081.                 st->codec->channels=1; /* really needed */

  1082.                 break;

  1083.             case CODEC_ID_AMR_NB:

  1084.                 st->codec->sample_rate = 8000; /* should really we ? */

  1085.                 st->codec->channels=1; /* really needed */

  1086.                 break;

  1087.             default:

  1088.                 break;

  1089.             }

  1090. 

  1091.             //Read QT version 1 fields. In version 0 theese dont exist

  1092.             dprintf("version =%d mp4=%d\n",version,c->mp4);

  1093.             if(version==1) {

  1094.                 get_be32(pb); /* samples per packet */

  1095.                 get_be32(pb); /* bytes per packet */

  1096.                 get_be32(pb); /* bytes per frame */

  1097.                 get_be32(pb); /* bytes per sample */

  1098.             } else if(version==2) {

  1099.                 get_be32(pb); /* sizeof struct only */

  1100.                 st->codec->sample_rate = av_int2dbl(get_be64(pb)); /* float 64 */

  1101.                 st->codec->channels = get_be32(pb);

  1102.                 get_be32(pb); /* always 0x7F000000 */

  1103.                 get_be32(pb); /* bits per channel if sound is uncompressed */

  1104.                 get_be32(pb); /* lcpm format specific flag */

  1105.                 get_be32(pb); /* bytes per audio packet if constant */

  1106.                 get_be32(pb); /* lpcm frames per audio packet if constant */

  1107.             }

  1108.         } else {

  1109.             /* other codec type, just skip (rtp, mp4s, tmcd ...) */

  1110.             url_fskip(pb, size - (url_ftell(pb) - start_pos));

  1111.         }

  1112.         /* this will read extra atoms at the end (wave, alac, damr, avcC, SMI ...) */

  1113.         a.size = size - (url_ftell(pb) - start_pos);

  1114.         if (a.size > 8)

  1115.             mov_read_default(c, pb, a);

  1116.         else if (a.size > 0)

  1117.             url_fskip(pb, a.size);

  1118.     }

  1119. 

  1120.     if(st->codec->codec_type==CODEC_TYPE_AUDIO && st->codec->sample_rate==0 && sc->time_scale>1) {

  1121.         st->codec->sample_rate= sc->time_scale;

  1122.     }

  1123. 

  1124.     return 0;

  1125. }

  1126. 

  1127. static int mov_read_stsc(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1128. {

  1129.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1130.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1131.     unsigned int i, entries;

  1132. 

  1133.     get_byte(pb); /* version */

  1134.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1135. 

  1136.     entries = get_be32(pb);

  1137. 

  1138.     if(entries >= UINT_MAX / sizeof(MOV_sample_to_chunk_tbl))

  1139.         return -1;

  1140. 

  1141. #ifdef DEBUG

  1142. av_log(NULL, AV_LOG_DEBUG, "track[%i].stsc.entries = %i\n", c->fc->nb_streams-1, entries);

  1143. #endif

  1144.     sc->sample_to_chunk_sz = entries;

  1145.     sc->sample_to_chunk = (MOV_sample_to_chunk_tbl*) av_malloc(entries * sizeof(MOV_sample_to_chunk_tbl));

  1146.     if (!sc->sample_to_chunk)

  1147.         return -1;

  1148.     for(i=0; i<entries; i++) {

  1149.         sc->sample_to_chunk[i].first = get_be32(pb);

  1150.         sc->sample_to_chunk[i].count = get_be32(pb);

  1151.         sc->sample_to_chunk[i].id = get_be32(pb);

  1152.     }

  1153.     return 0;

  1154. }

  1155. 

  1156. static int mov_read_stss(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1157. {

  1158.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1159.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1160.     unsigned int i, entries;

  1161. 

  1162.     get_byte(pb); /* version */

  1163.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1164. 

  1165.     entries = get_be32(pb);

  1166. 

  1167.     if(entries >= UINT_MAX / sizeof(long))

  1168.         return -1;

  1169. 

  1170.     sc->keyframe_count = entries;

  1171. #ifdef DEBUG

  1172.     av_log(NULL, AV_LOG_DEBUG, "keyframe_count = %ld\n", sc->keyframe_count);

  1173. #endif

  1174.     sc->keyframes = (long*) av_malloc(entries * sizeof(long));

  1175.     if (!sc->keyframes)

  1176.         return -1;

  1177.     for(i=0; i<entries; i++) {

  1178.         sc->keyframes[i] = get_be32(pb);

  1179. #ifdef DEBUG

  1180. /*        av_log(NULL, AV_LOG_DEBUG, "keyframes[]=%ld\n", sc->keyframes[i]); */

  1181. #endif

  1182.     }

  1183.     return 0;

  1184. }

  1185. 

  1186. static int mov_read_stsz(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1187. {

  1188.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1189.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1190.     unsigned int i, entries;

  1191. 

  1192.     get_byte(pb); /* version */

  1193.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1194. 

  1195.     sc->sample_size = get_be32(pb);

  1196.     entries = get_be32(pb);

  1197.     if(entries >= UINT_MAX / sizeof(long))

  1198.         return -1;

  1199. 

  1200.     sc->sample_count = entries;

  1201. #ifdef DEBUG

  1202.     av_log(NULL, AV_LOG_DEBUG, "sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  1203. #endif

  1204.     if(sc->sample_size) {

  1205.         /* override sample size for uncompressed sound */

  1206.         switch (st->codec->codec_id) {

  1207.         case CODEC_ID_PCM_S32BE:

  1208.         case CODEC_ID_PCM_S32LE:

  1209.             sc->sample_size = 4 * st->codec->channels;

  1210.             break;

  1211.         case CODEC_ID_PCM_S24BE:

  1212.         case CODEC_ID_PCM_S24LE:

  1213.             sc->sample_size = 3 * st->codec->channels;

  1214.             break;

  1215.         case CODEC_ID_PCM_S16BE:

  1216.         case CODEC_ID_PCM_S16LE:

  1217.             sc->sample_size = 2 * st->codec->channels;

  1218.             break;

  1219.         case CODEC_ID_PCM_MULAW:

  1220.         case CODEC_ID_PCM_ALAW:

  1221.         case CODEC_ID_PCM_S8:

  1222.         case CODEC_ID_PCM_U8:

  1223.             sc->sample_size = 1 * st->codec->channels;

  1224.             break;

  1225.         default:

  1226.             break;

  1227.         }

  1228.         assert(sc->sample_size);

  1229.         return 0; /* there isn't any table following */

  1230.     }

  1231.     sc->sample_sizes = (long*) av_malloc(entries * sizeof(long));

  1232.     if (!sc->sample_sizes)

  1233.         return -1;

  1234.     for(i=0; i<entries; i++) {

  1235.         sc->sample_sizes[i] = get_be32(pb);

  1236. #ifdef DEBUG

  1237.         av_log(NULL, AV_LOG_DEBUG, "sample_sizes[]=%ld\n", sc->sample_sizes[i]);

  1238. #endif

  1239.     }

  1240.     return 0;

  1241. }

  1242. 

  1243. static int mov_read_stts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1244. {

  1245.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1246.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1247.     unsigned int i, entries;

  1248.     int64_t duration=0;

  1249.     int64_t total_sample_count=0;

  1250. 

  1251.     get_byte(pb); /* version */

  1252.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1253.     entries = get_be32(pb);

  1254.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1255.         return -1;

  1256. 

  1257.     sc->stts_count = entries;

  1258.     sc->stts_data = av_malloc(entries * sizeof(Time2Sample));

  1259. 

  1260. #ifdef DEBUG

  1261. av_log(NULL, AV_LOG_DEBUG, "track[%i].stts.entries = %i\n", c->fc->nb_streams-1, entries);

  1262. #endif

  1263. 

  1264.     sc->time_rate=0;

  1265. 

  1266.     for(i=0; i<entries; i++) {

  1267.         int sample_duration;

  1268.         int sample_count;

  1269. 

  1270.         sample_count=get_be32(pb);

  1271.         sample_duration = get_be32(pb);

  1272.         sc->stts_data[i].count= sample_count;

  1273.         sc->stts_data[i].duration= sample_duration;

  1274. 

  1275.         sc->time_rate= ff_gcd(sc->time_rate, sample_duration);

  1276. 

  1277.         dprintf("sample_count=%d, sample_duration=%d\n",sample_count,sample_duration);

  1278. 

  1279.         duration+=sample_duration*sample_count;

  1280.         total_sample_count+=sample_count;

  1281.     }

  1282. 

  1283.     st->nb_frames= total_sample_count;

  1284.     if(duration)

  1285.         st->duration= duration;

  1286.     return 0;

  1287. }

  1288. 

  1289. static int mov_read_ctts(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1290. {

  1291.     AVStream *st = c->fc->streams[c->fc->nb_streams-1];

  1292.     MOVStreamContext *sc = (MOVStreamContext *)st->priv_data;

  1293.     unsigned int i, entries;

  1294. 

  1295.     get_byte(pb); /* version */

  1296.     get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1297.     entries = get_be32(pb);

  1298.     if(entries >= UINT_MAX / sizeof(Time2Sample))

  1299.         return -1;

  1300. 

  1301.     sc->ctts_count = entries;

  1302.     sc->ctts_data = av_malloc(entries * sizeof(Time2Sample));

  1303. 

  1304.     dprintf("track[%i].ctts.entries = %i\n", c->fc->nb_streams-1, entries);

  1305. 

  1306.     for(i=0; i<entries; i++) {

  1307.         int count    =get_be32(pb);

  1308.         int duration =get_be32(pb);

  1309. 

  1310.         sc->ctts_data[i].count   = count;

  1311.         sc->ctts_data[i].duration= duration;

  1312. 

  1313.         sc->time_rate= ff_gcd(sc->time_rate, duration);

  1314.     }

  1315.     return 0;

  1316. }

  1317. 

  1318. static int mov_read_trak(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1319. {

  1320.     AVStream *st;

  1321.     MOVStreamContext *sc;

  1322. 

  1323.     st = av_new_stream(c->fc, c->fc->nb_streams);

  1324.     if (!st) return -2;

  1325.     sc = (MOVStreamContext*) av_mallocz(sizeof(MOVStreamContext));

  1326.     if (!sc) {

  1327.         av_free(st);

  1328.         return -1;

  1329.     }

  1330. 

  1331.     sc->sample_to_chunk_index = -1;

  1332.     st->priv_data = sc;

  1333.     st->codec->codec_type = CODEC_TYPE_MOV_OTHER;

  1334.     st->start_time = 0; /* XXX: check */

  1335.     c->streams[c->fc->nb_streams-1] = sc;

  1336. 

  1337.     return mov_read_default(c, pb, atom);

  1338. }

  1339. 

  1340. static int mov_read_tkhd(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1341. {

  1342.     AVStream *st;

  1343.     int version;

  1344. 

  1345.     st = c->fc->streams[c->fc->nb_streams-1];

  1346. 

  1347.     version = get_byte(pb); /* version */

  1348. 

  1349.     get_byte(pb); get_byte(pb);

  1350.     get_byte(pb); /* flags */

  1351.     /*

  1352.     MOV_TRACK_ENABLED 0x0001

  1353.     MOV_TRACK_IN_MOVIE 0x0002

  1354.     MOV_TRACK_IN_PREVIEW 0x0004

  1355.     MOV_TRACK_IN_POSTER 0x0008

  1356.     */

  1357. 

  1358.     if (version == 1) {

  1359.         get_be64(pb);

  1360.         get_be64(pb);

  1361.     } else {

  1362.         get_be32(pb); /* creation time */

  1363.         get_be32(pb); /* modification time */

  1364.     }

  1365.     st->id = (int)get_be32(pb); /* track id (NOT 0 !)*/

  1366.     get_be32(pb); /* reserved */

  1367.     st->start_time = 0; /* check */

  1368.     (version == 1) ? get_be64(pb) : get_be32(pb); /* highlevel (considering edits) duration in movie timebase */

  1369.     get_be32(pb); /* reserved */

  1370.     get_be32(pb); /* reserved */

  1371. 

  1372.     get_be16(pb); /* layer */

  1373.     get_be16(pb); /* alternate group */

  1374.     get_be16(pb); /* volume */

  1375.     get_be16(pb); /* reserved */

  1376. 

  1377.     url_fskip(pb, 36); /* display matrix */

  1378. 

  1379.     /* those are fixed-point */

  1380.     /*st->codec->width =*/ get_be32(pb) >> 16; /* track width */

  1381.     /*st->codec->height =*/ get_be32(pb) >> 16; /* track height */

  1382. 

  1383.     return 0;

  1384. }

  1385. 

  1386. /* this atom should be null (from specs), but some buggy files put the 'moov' atom inside it... */

  1387. /* like the files created with Adobe Premiere 5.0, for samples see */

  1388. /* http://graphics.tudelft.nl/~wouter/publications/soundtests/ */

  1389. static int mov_read_wide(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1390. {

  1391.     int err;

  1392. 

  1393.     if (atom.size < 8)

  1394.         return 0; /* continue */

  1395.     if (get_be32(pb) != 0) { /* 0 sized mdat atom... use the 'wide' atom size */

  1396.         url_fskip(pb, atom.size - 4);

  1397.         return 0;

  1398.     }

  1399.     atom.type = get_le32(pb);

  1400.     atom.offset += 8;

  1401.     atom.size -= 8;

  1402.     if (atom.type != MKTAG('m', 'd', 'a', 't')) {

  1403.         url_fskip(pb, atom.size);

  1404.         return 0;

  1405.     }

  1406.     err = mov_read_mdat(c, pb, atom);

  1407.     return err;

  1408. }

  1409. 

  1410. 

  1411. #ifdef CONFIG_ZLIB

  1412. static int null_read_packet(void *opaque, uint8_t *buf, int buf_size)

  1413. {

  1414.     return -1;

  1415. }

  1416. 

  1417. static int mov_read_cmov(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1418. {

  1419.     ByteIOContext ctx;

  1420.     uint8_t *cmov_data;

  1421.     uint8_t *moov_data; /* uncompressed data */

  1422.     long cmov_len, moov_len;

  1423.     int ret;

  1424. 

  1425.     get_be32(pb); /* dcom atom */

  1426.     if (get_le32(pb) != MKTAG( 'd', 'c', 'o', 'm' ))

  1427.         return -1;

  1428.     if (get_le32(pb) != MKTAG( 'z', 'l', 'i', 'b' )) {

  1429.         av_log(NULL, AV_LOG_ERROR, "unknown compression for cmov atom !");

  1430.         return -1;

  1431.     }

  1432.     get_be32(pb); /* cmvd atom */

  1433.     if (get_le32(pb) != MKTAG( 'c', 'm', 'v', 'd' ))

  1434.         return -1;

  1435.     moov_len = get_be32(pb); /* uncompressed size */

  1436.     cmov_len = atom.size - 6 * 4;

  1437. 

  1438.     cmov_data = (uint8_t *) av_malloc(cmov_len);

  1439.     if (!cmov_data)

  1440.         return -1;

  1441.     moov_data = (uint8_t *) av_malloc(moov_len);

  1442.     if (!moov_data) {

  1443.         av_free(cmov_data);

  1444.         return -1;

  1445.     }

  1446.     get_buffer(pb, cmov_data, cmov_len);

  1447.     if(uncompress (moov_data, (uLongf *) &moov_len, (const Bytef *)cmov_data, cmov_len) != Z_OK)

  1448.         return -1;

  1449.     if(init_put_byte(&ctx, moov_data, moov_len, 0, NULL, null_read_packet, NULL, NULL) != 0)

  1450.         return -1;

  1451.     ctx.buf_end = ctx.buffer + moov_len;

  1452.     atom.type = MKTAG( 'm', 'o', 'o', 'v' );

  1453.     atom.offset = 0;

  1454.     atom.size = moov_len;

  1455. #ifdef DEBUG

  1456. //    { int fd = open("/tmp/uncompheader.mov", O_WRONLY | O_CREAT); write(fd, moov_data, moov_len); close(fd); }

  1457. #endif

  1458.     ret = mov_read_default(c, &ctx, atom);

  1459.     av_free(moov_data);

  1460.     av_free(cmov_data);

  1461. 

  1462.     return ret;

  1463. }

  1464. #endif

  1465. 

  1466. /* edit list atom */

  1467. static int mov_read_elst(MOVContext *c, ByteIOContext *pb, MOV_atom_t atom)

  1468. {

  1469.   int i, edit_count;

  1470. 

  1471.   get_byte(pb); /* version */

  1472.   get_byte(pb); get_byte(pb); get_byte(pb); /* flags */

  1473.   edit_count= c->streams[c->fc->nb_streams-1]->edit_count = get_be32(pb);     /* entries */

  1474. 

  1475.   for(i=0; i<edit_count; i++){

  1476.     get_be32(pb); /* Track duration */

  1477.     get_be32(pb); /* Media time */

  1478.     get_be32(pb); /* Media rate */

  1479.   }

  1480.   dprintf("track[%i].edit_count = %i\n", c->fc->nb_streams-1, c->streams[c->fc->nb_streams-1]->edit_count);

  1481.   return 0;

  1482. }

  1483. 

  1484. static const MOVParseTableEntry mov_default_parse_table[] = {

  1485. /* mp4 atoms */

  1486. { MKTAG( 'c', 'o', '6', '4' ), mov_read_stco },

  1487. { MKTAG( 'c', 'p', 'r', 't' ), mov_read_default },

  1488. { MKTAG( 'c', 'r', 'h', 'd' ), mov_read_default },

  1489. { MKTAG( 'c', 't', 't', 's' ), mov_read_ctts }, /* composition time to sample */

  1490. { MKTAG( 'd', 'i', 'n', 'f' ), mov_read_default }, /* data information */

  1491. { MKTAG( 'd', 'p', 'n', 'd' ), mov_read_leaf },

  1492. { MKTAG( 'd', 'r', 'e', 'f' ), mov_read_leaf },

  1493. { MKTAG( 'e', 'd', 't', 's' ), mov_read_default },

  1494. { MKTAG( 'e', 'l', 's', 't' ), mov_read_elst },

  1495. { MKTAG( 'e', 'n', 'd', 'a' ), mov_read_enda },

  1496. { MKTAG( 'f', 'r', 'e', 'e' ), mov_read_leaf },

  1497. { MKTAG( 'f', 't', 'y', 'p' ), mov_read_ftyp },

  1498. { MKTAG( 'h', 'd', 'l', 'r' ), mov_read_hdlr },

  1499. { MKTAG( 'h', 'i', 'n', 't' ), mov_read_leaf },

  1500. { MKTAG( 'h', 'm', 'h', 'd' ), mov_read_leaf },

  1501. { MKTAG( 'i', 'o', 'd', 's' ), mov_read_leaf },

  1502. { MKTAG( 'j', 'p', '2', 'h' ), mov_read_jp2h },

  1503. { MKTAG( 'm', 'd', 'a', 't' ), mov_read_mdat },

  1504. { MKTAG( 'm', 'd', 'h', 'd' ), mov_read_mdhd },

  1505. { MKTAG( 'm', 'd', 'i', 'a' ), mov_read_default },

  1506. { MKTAG( 'm', 'i', 'n', 'f' ), mov_read_default },

  1507. { MKTAG( 'm', 'o', 'o', 'v' ), mov_read_moov },

  1508. { MKTAG( 'm', 'p', '4', 'a' ), mov_read_default },

  1509. { MKTAG( 'm', 'p', '4', 's' ), mov_read_default },

  1510. { MKTAG( 'm', 'p', '4', 'v' ), mov_read_default },

  1511. { MKTAG( 'm', 'p', 'o', 'd' ), mov_read_leaf },

  1512. { MKTAG( 'm', 'v', 'h', 'd' ), mov_read_mvhd },

  1513. { MKTAG( 'n', 'm', 'h', 'd' ), mov_read_leaf },

  1514. { MKTAG( 'o', 'd', 'h', 'd' ), mov_read_default },

  1515. { MKTAG( 's', 'd', 'h', 'd' ), mov_read_default },

  1516. { MKTAG( 's', 'k', 'i', 'p' ), mov_read_leaf },

  1517. { MKTAG( 's', 'm', 'h', 'd' ), mov_read_leaf }, /* sound media info header */

  1518. { MKTAG( 'S', 'M', 'I', ' ' ), mov_read_smi }, /* Sorenson extension ??? */

  1519. { MKTAG( 'a', 'l', 'a', 'c' ), mov_read_alac }, /* alac specific atom */

  1520. { MKTAG( 'a', 'v', 'c', 'C' ), mov_read_avcC },

  1521. { MKTAG( 's', 't', 'b', 'l' ), mov_read_default },

  1522. { MKTAG( 's', 't', 'c', 'o' ), mov_read_stco },

  1523. { MKTAG( 's', 't', 'd', 'p' ), mov_read_default },

  1524. { MKTAG( 's', 't', 's', 'c' ), mov_read_stsc },

  1525. { MKTAG( 's', 't', 's', 'd' ), mov_read_stsd }, /* sample description */

  1526. { MKTAG( 's', 't', 's', 'h' ), mov_read_default },

  1527. { MKTAG( 's', 't', 's', 's' ), mov_read_stss }, /* sync sample */

  1528. { MKTAG( 's', 't', 's', 'z' ), mov_read_stsz }, /* sample size */

  1529. { MKTAG( 's', 't', 't', 's' ), mov_read_stts },

  1530. { MKTAG( 't', 'k', 'h', 'd' ), mov_read_tkhd }, /* track header */

  1531. { MKTAG( 't', 'r', 'a', 'k' ), mov_read_trak },

  1532. { MKTAG( 't', 'r', 'e', 'f' ), mov_read_default }, /* not really */

  1533. { MKTAG( 'u', 'd', 't', 'a' ), mov_read_leaf },

  1534. { MKTAG( 'u', 'r', 'l', ' ' ), mov_read_leaf },

  1535. { MKTAG( 'u', 'r', 'n', ' ' ), mov_read_leaf },

  1536. { MKTAG( 'u', 'u', 'i', 'd' ), mov_read_leaf },

  1537. { MKTAG( 'v', 'm', 'h', 'd' ), mov_read_leaf }, /* video media info header */

  1538. { MKTAG( 'w', 'a', 'v', 'e' ), mov_read_wave },

  1539. /* extra mp4 */

  1540. { MKTAG( 'M', 'D', 'E', 'S' ), mov_read_leaf },

  1541. /* QT atoms */

  1542. { MKTAG( 'c', 'h', 'a', 'p' ), mov_read_leaf },

  1543. { MKTAG( 'c', 'l', 'i', 'p' ), mov_read_default },

  1544. { MKTAG( 'c', 'r', 'g', 'n' ), mov_read_leaf },

  1545. { MKTAG( 'c', 't', 'a', 'b' ), mov_read_ctab },

  1546. { MKTAG( 'e', 's', 'd', 's' ), mov_read_esds },

  1547. { MKTAG( 'k', 'm', 'a', 't' ), mov_read_leaf },

  1548. { MKTAG( 'm', 'a', 't', 't' ), mov_read_default },

  1549. { MKTAG( 'r', 'd', 'r', 'f' ), mov_read_leaf },

  1550. { MKTAG( 'r', 'm', 'd', 'a' ), mov_read_default },

  1551. { MKTAG( 'r', 'm', 'd', 'r' ), mov_read_leaf },

  1552. { MKTAG( 'r', 'm', 'r', 'a' ), mov_read_default },

  1553. { MKTAG( 's', 'c', 'p', 't' ), mov_read_leaf },

  1554. { MKTAG( 's', 's', 'r', 'c' ), mov_read_leaf },

  1555. { MKTAG( 's', 'y', 'n', 'c' ), mov_read_leaf },

  1556. { MKTAG( 't', 'c', 'm', 'd' ), mov_read_leaf },

  1557. { MKTAG( 'w', 'i', 'd', 'e' ), mov_read_wide }, /* place holder */

  1558. //{ MKTAG( 'r', 'm', 'q', 'u' ), mov_read_leaf },

  1559. #ifdef CONFIG_ZLIB

  1560. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_cmov },

  1561. #else

  1562. { MKTAG( 'c', 'm', 'o', 'v' ), mov_read_leaf },

  1563. #endif

  1564. { 0L, mov_read_leaf }

  1565. };

  1566. 

  1567. static void mov_free_stream_context(MOVStreamContext *sc)

  1568. {

  1569.     if(sc) {

  1570.         av_freep(&sc->chunk_offsets);

  1571.         av_freep(&sc->sample_to_chunk);

  1572.         av_freep(&sc->sample_sizes);

  1573.         av_freep(&sc->keyframes);

  1574.         av_freep(&sc->stts_data);

  1575.         av_freep(&sc->ctts_data);

  1576.         av_freep(&sc);

  1577.     }

  1578. }

  1579. 

  1580. static inline uint32_t mov_to_tag(uint8_t *buf)

  1581. {

  1582.     return MKTAG(buf[0], buf[1], buf[2], buf[3]);

  1583. }

  1584. 

  1585. static inline uint32_t to_be32(uint8_t *buf)

  1586. {

  1587.     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];

  1588. }

  1589. 

  1590. /* XXX: is it sufficient ? */

  1591. static int mov_probe(AVProbeData *p)

  1592. {

  1593.     unsigned int offset;

  1594.     uint32_t tag;

  1595.     int score = 0;

  1596. 

  1597.     /* check file header */

  1598.     if (p->buf_size <= 12)

  1599.         return 0;

  1600.     offset = 0;

  1601.     for(;;) {

  1602.         /* ignore invalid offset */

  1603.         if ((offset + 8) > (unsigned int)p->buf_size)

  1604.             return score;

  1605.         tag = mov_to_tag(p->buf + offset + 4);

  1606.         switch(tag) {

  1607.         /* check for obvious tags */

  1608.         case MKTAG( 'j', 'P', ' ', ' ' ): /* jpeg 2000 signature */

  1609.         case MKTAG( 'm', 'o', 'o', 'v' ):

  1610.         case MKTAG( 'm', 'd', 'a', 't' ):

  1611.         case MKTAG( 'p', 'n', 'o', 't' ): /* detect movs with preview pics like ew.mov and april.mov */

  1612.         case MKTAG( 'u', 'd', 't', 'a' ): /* Packet Video PVAuthor adds this and a lot of more junk */

  1613.             return AVPROBE_SCORE_MAX;

  1614.         /* those are more common words, so rate then a bit less */

  1615.         case MKTAG( 'w', 'i', 'd', 'e' ):

  1616.         case MKTAG( 'f', 'r', 'e', 'e' ):

  1617.         case MKTAG( 'j', 'u', 'n', 'k' ):

  1618.         case MKTAG( 'p', 'i', 'c', 't' ):

  1619.             return AVPROBE_SCORE_MAX - 5;

  1620.         case MKTAG( 'f', 't', 'y', 'p' ):

  1621.         case MKTAG( 's', 'k', 'i', 'p' ):

  1622.         case MKTAG( 'u', 'u', 'i', 'd' ):

  1623.             offset = to_be32(p->buf+offset) + offset;

  1624.             /* if we only find those cause probedata is too small at least rate them */

  1625.             score = AVPROBE_SCORE_MAX - 50;

  1626.             break;

  1627.         default:

  1628.             /* unrecognized tag */

  1629.             return score;

  1630.         }

  1631.     }

  1632.     return score;

  1633. }

  1634. 

  1635. static int mov_read_header(AVFormatContext *s, AVFormatParameters *ap)

  1636. {

  1637.     MOVContext *mov = (MOVContext *) s->priv_data;

  1638.     ByteIOContext *pb = &s->pb;

  1639.     int i, j, nb, err;

  1640.     MOV_atom_t atom = { 0, 0, 0 };

  1641. 

  1642.     mov->fc = s;

  1643.     mov->parse_table = mov_default_parse_table;

  1644. 

  1645.     if(!url_is_streamed(pb)) /* .mov and .mp4 aren't streamable anyway (only progressive download if moov is before mdat) */

  1646.         atom.size = url_fsize(pb);

  1647.     else

  1648.         atom.size = 0x7FFFFFFFFFFFFFFFLL;

  1649. 

  1650.     /* check MOV header */

  1651.     err = mov_read_default(mov, pb, atom);

  1652.     if (err<0 || (!mov->found_moov && !mov->found_mdat)) {

  1653.         av_log(s, AV_LOG_ERROR, "mov: header not found !!! (err:%d, moov:%d, mdat:%d) pos:%"PRId64"\n",

  1654.                 err, mov->found_moov, mov->found_mdat, url_ftell(pb));

  1655.         return -1;

  1656.     }

  1657.     dprintf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  1658. 

  1659.     /* some cleanup : make sure we are on the mdat atom */

  1660.     if(!url_is_streamed(pb) && (url_ftell(pb) != mov->mdat_offset))

  1661.         url_fseek(pb, mov->mdat_offset, SEEK_SET);

  1662. 

  1663.     mov->next_chunk_offset = mov->mdat_offset; /* initialise reading */

  1664.     mov->total_streams = nb = s->nb_streams;

  1665. 

  1666. #if 1

  1667.     for(i=0; i<s->nb_streams;) {

  1668.         if(s->streams[i]->codec->codec_type == CODEC_TYPE_MOV_OTHER) {/* not audio, not video, delete */

  1669.             av_free(s->streams[i]);

  1670.             for(j=i+1; j<s->nb_streams; j++)

  1671.                 s->streams[j-1] = s->streams[j];

  1672.             s->nb_streams--;

  1673.         } else

  1674.             i++;

  1675.     }

  1676.     for(i=0; i<s->nb_streams;i++) {

  1677.         MOVStreamContext *sc = (MOVStreamContext *)s->streams[i]->priv_data;

  1678. 

  1679.         if(!sc->time_rate)

  1680.             sc->time_rate=1;

  1681.         if(!sc->time_scale)

  1682.             sc->time_scale= mov->time_scale;

  1683.         av_set_pts_info(s->streams[i], 64, sc->time_rate, sc->time_scale);

  1684. 

  1685.         if(s->streams[i]->duration != AV_NOPTS_VALUE){

  1686.             assert(s->streams[i]->duration % sc->time_rate == 0);

  1687.             s->streams[i]->duration /= sc->time_rate;

  1688.         }

  1689. 

  1690.         sc->ffindex = i;

  1691.         sc->is_ff_stream = 1;

  1692.     }

  1693. #endif

  1694.     return 0;

  1695. }

  1696. 

  1697. /* Yes, this is ugly... I didn't write the specs of QT :p */

  1698. /* XXX:remove useless commented code sometime */

  1699. static int mov_read_packet(AVFormatContext *s, AVPacket *pkt)

  1700. {

  1701.     MOVContext *mov = (MOVContext *) s->priv_data;

  1702.     MOVStreamContext *sc;

  1703.     AVStream *st;

  1704.     int64_t offset = INT64_MAX;

  1705.     int64_t best_dts = INT64_MAX;

  1706.     int i, a, b, m;

  1707.     int next_sample= -99;

  1708.     int size;

  1709.     int idx;

  1710.     size = 0x0FFFFFFF;

  1711. 

  1712.     if (mov->partial) {

  1713.         sc = mov->partial;

  1714.         idx = sc->sample_to_chunk_index;

  1715. 

  1716.         if (idx < 0) return 0;

  1717.         dprintf("sc[ffid %d]->sample_size = %ld\n", sc->ffindex, sc->sample_size);

  1718.         //size = sc->sample_sizes[sc->current_sample];

  1719.         // that ain't working...

  1720.         //size = (sc->sample_size)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1721.         size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1722. 

  1723.         next_sample= sc->current_sample+1;

  1724. 

  1725.         sc->left_in_chunk--;

  1726. 

  1727.         if (sc->left_in_chunk <= 0)

  1728.             mov->partial = 0;

  1729.         offset = mov->next_chunk_offset;

  1730.         /* extract the sample */

  1731. 

  1732.         goto readchunk;

  1733.     }

  1734. 

  1735. again:

  1736.     sc = 0;

  1737.     if(offset == INT64_MAX)

  1738.         best_dts= INT64_MAX;

  1739.     for(i=0; i<mov->total_streams; i++) {

  1740.         MOVStreamContext *msc = mov->streams[i];

  1741. 

  1742.         if ((msc->next_chunk < msc->chunk_count) && msc->next_chunk >= 0){

  1743.             if (msc->sample_to_time_index < msc->stts_count && mov->ni) {

  1744.                 int64_t dts;

  1745.                 int index= msc->sample_to_time_index;

  1746.                 int sample= msc->sample_to_time_sample;

  1747.                 int time= msc->sample_to_time_time;

  1748.                 int duration = msc->stts_data[index].duration;

  1749.                 int count = msc->stts_data[index].count;

  1750.                 if (sample + count <= msc->current_sample) {

  1751.                     sample += count;

  1752.                     time   += count*duration;

  1753.                     index ++;

  1754.                     duration = msc->stts_data[index].duration;

  1755.                 }

  1756.                 dts = time + (msc->current_sample - sample) * (int64_t)duration;

  1757.                 dts = av_rescale(dts, AV_TIME_BASE, msc->time_scale);

  1758.                 dprintf("stream: %d dts: %"PRId64" best_dts: %"PRId64" offset: %"PRId64"\n", i, dts, best_dts, offset);

  1759.                 if(dts < best_dts){

  1760.                     best_dts= dts;

  1761.                     sc = msc;

  1762.                     offset = msc->chunk_offsets[msc->next_chunk];

  1763.                 }

  1764.             }else{

  1765.                 if ((msc->chunk_offsets[msc->next_chunk] < offset)) {

  1766.                     sc = msc;

  1767.                     offset = msc->chunk_offsets[msc->next_chunk];

  1768.                 }

  1769.             }

  1770.         }

  1771.     }

  1772.     if (!sc || offset==INT64_MAX)

  1773.         return -1;

  1774. 

  1775.     sc->next_chunk++;

  1776. 

  1777.     if(mov->next_chunk_offset < offset) { /* some meta data */

  1778.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1779.         mov->next_chunk_offset = offset;

  1780.     }

  1781. 

  1782.     if(!sc->is_ff_stream || (s->streams[sc->ffindex]->discard >= AVDISCARD_ALL)) {

  1783.         url_fskip(&s->pb, (offset - mov->next_chunk_offset));

  1784.         mov->next_chunk_offset = offset;

  1785.         offset = INT64_MAX;

  1786.         goto again;

  1787.     }

  1788. 

  1789.     /* now get the chunk size... */

  1790. 

  1791.     for(i=0; i<mov->total_streams; i++) {

  1792.         MOVStreamContext *msc = mov->streams[i];

  1793.         if ((msc->next_chunk < msc->chunk_count)

  1794.             && msc->chunk_offsets[msc->next_chunk] - offset < size

  1795.             && msc->chunk_offsets[msc->next_chunk] > offset)

  1796.             size = msc->chunk_offsets[msc->next_chunk] - offset;

  1797.     }

  1798. 

  1799. #ifdef MOV_MINOLTA_FIX

  1800.     //Make sure that size is according to sample_size (Needed by .mov files

  1801.     //created on a Minolta Dimage Xi where audio chunks contains waste data in the end)

  1802.     //Maybe we should really not only check sc->sample_size, but also sc->sample_sizes

  1803.     //but I have no such movies

  1804.     if (sc->sample_size > 0) {

  1805.         int foundsize=0;

  1806.         for(i=0; i<(sc->sample_to_chunk_sz); i++) {

  1807.             if( (sc->sample_to_chunk[i].first)<=(sc->next_chunk) )

  1808.             {

  1809.                 foundsize=sc->sample_to_chunk[i].count*sc->sample_size;

  1810.             }

  1811.             dprintf("sample_to_chunk first=%ld count=%ld, id=%ld\n", sc->sample_to_chunk[i].first, sc->sample_to_chunk[i].count, sc->sample_to_chunk[i].id);

  1812.         }

  1813.         if( (foundsize>0) && (foundsize<size) )

  1814.         {

  1815.             size=foundsize;

  1816.         }

  1817.     }

  1818. #endif //MOV_MINOLTA_FIX

  1819. 

  1820.     idx = sc->sample_to_chunk_index;

  1821.     if (idx + 1 < sc->sample_to_chunk_sz && sc->next_chunk >= sc->sample_to_chunk[idx + 1].first)

  1822.         idx++;

  1823.     sc->sample_to_chunk_index = idx;

  1824.     /* split chunks into samples */

  1825.     if (sc->sample_size == 0 || sc->sample_size > 100) {

  1826.         if (idx >= 0 && sc->sample_to_chunk[idx].count != 1) {

  1827.             mov->partial = sc;

  1828.             /* we'll have to get those samples before next chunk */

  1829.             sc->left_in_chunk = sc->sample_to_chunk[idx].count - 1;

  1830.             size = (sc->sample_size > 1)?sc->sample_size:sc->sample_sizes[sc->current_sample];

  1831.         }

  1832. 

  1833.         next_sample= sc->current_sample+1;

  1834.     }else if(idx < sc->sample_to_chunk_sz){

  1835.         next_sample= sc->current_sample + sc->sample_to_chunk[idx].count;

  1836.     }else

  1837.         next_sample= sc->current_sample;

  1838. 

  1839. readchunk:

  1840.     dprintf("chunk: %"PRId64" -> %"PRId64" (%i)\n", offset, offset + size, size);

  1841.     if(size == 0x0FFFFFFF)

  1842.         size = mov->mdat_size + mov->mdat_offset - offset;

  1843.     if(size < 0)

  1844.         return -1;

  1845.     if(size == 0)

  1846.         return -1;

  1847.     url_fseek(&s->pb, offset, SEEK_SET);

  1848. 

  1849.     av_get_packet(&s->pb, pkt, size);

  1850.     pkt->stream_index = sc->ffindex;

  1851. 

  1852.     // If the keyframes table exists, mark any samples that are in the table as key frames.

  1853.     // If no table exists, treat very sample as a key frame.

  1854.     if (sc->keyframes) {

  1855.         a = 0;

  1856.         b = sc->keyframe_count - 1;

  1857. 

  1858.         while (a < b) {

  1859.             m = (a + b + 1) >> 1;

  1860.             if (sc->keyframes[m] > sc->current_sample) {

  1861.                 b = m - 1;

  1862.             } else {

  1863.                 a = m;

  1864.             }

  1865.         }

  1866. 

  1867.         if (sc->keyframes[a] == sc->current_sample)

  1868.             pkt->flags |= PKT_FLAG_KEY;

  1869.     }

  1870.     else

  1871.         pkt->flags |= PKT_FLAG_KEY;

  1872. 

  1873.     mov->next_chunk_offset = offset + size;

  1874. 

  1875.     /* find the corresponding dts */

  1876.     if (sc && sc->sample_to_time_index < sc->stts_count && pkt) {

  1877.       unsigned int count;

  1878.       uint64_t dts, pts;

  1879.       unsigned int duration = sc->stts_data[sc->sample_to_time_index].duration;

  1880.       count = sc->stts_data[sc->sample_to_time_index].count;

  1881.       if ((sc->sample_to_time_sample + count) <= sc->current_sample) {

  1882.         sc->sample_to_time_sample += count;

  1883.         sc->sample_to_time_time   += count*duration;

  1884.         sc->sample_to_time_index ++;

  1885.         duration = sc->stts_data[sc->sample_to_time_index].duration;

  1886.       }

  1887.       dts = sc->sample_to_time_time + (sc->current_sample - sc->sample_to_time_sample) * (int64_t)duration;

  1888.         /* find the corresponding pts */

  1889.         if (sc->sample_to_ctime_index < sc->ctts_count) {

  1890.             int duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  1891.             int count = sc->ctts_data[sc->sample_to_ctime_index].count;

  1892. 

  1893.             if ((sc->sample_to_ctime_sample + count) <= sc->current_sample) {

  1894.                 sc->sample_to_ctime_sample += count;

  1895.                 sc->sample_to_ctime_index ++;

  1896.                 duration = sc->ctts_data[sc->sample_to_ctime_index].duration;

  1897.             }

  1898.             pts = dts + duration;

  1899.         }else

  1900.             pts = dts;

  1901. 

  1902.         st= s->streams[ sc->ffindex ];

  1903.         assert(pts % st->time_base.num == 0);

  1904.         assert(dts % st->time_base.num == 0);

  1905. 

  1906.         pkt->pts = pts / st->time_base.num;

  1907.         pkt->dts = dts / st->time_base.num;

  1908.         dprintf("stream #%d smp #%ld dts = %"PRId64" pts = %"PRId64" (smp:%ld time:%"PRId64" idx:%d ent:%d count:%d dur:%d)\n"

  1909.                 , pkt->stream_index, sc->current_sample-1, pkt->dts, pkt->pts

  1910.                 , sc->sample_to_time_sample

  1911.                 , sc->sample_to_time_time

  1912.                 , sc->sample_to_time_index

  1913.                 , sc->stts_count

  1914.                 , count

  1915.                 , duration);

  1916.     }

  1917. 

  1918.     assert(next_sample>=0);

  1919.     sc->current_sample= next_sample;

  1920. 

  1921.     return 0;

  1922. }

  1923. 

  1924. #if defined(MOV_SEEK)

  1925. /**

  1926.  * Seek method based on the one described in the Appendix C of QTFileFormat.pdf

  1927.  */

  1928. static int mov_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)

  1929. {

  1930.     MOVContext* mov = (MOVContext *) s->priv_data;

  1931.     MOVStreamContext* sc;

  1932.     int32_t i, a, b, m;

  1933.     int64_t start_time;

  1934.     int32_t seek_sample, sample;

  1935.     int32_t duration;

  1936.     int32_t count;

  1937.     int32_t chunk;

  1938.     int32_t left_in_chunk;

  1939.     int64_t chunk_file_offset;

  1940.     int64_t sample_file_offset;

  1941.     int32_t first_chunk_sample;

  1942.     int32_t sample_to_chunk_idx;

  1943.     int sample_to_time_index;

  1944.     long sample_to_time_sample = 0;

  1945.     uint64_t sample_to_time_time = 0;

  1946.     int mov_idx;

  1947. 

  1948.     // Find the corresponding mov stream

  1949.     for (mov_idx = 0; mov_idx < mov->total_streams; mov_idx++)

  1950.         if (mov->streams[mov_idx]->ffindex == stream_index)

  1951.             break;

  1952.     if (mov_idx == mov->total_streams) {

  1953.         av_log(s, AV_LOG_ERROR, "mov: requested stream was not found in mov streams (idx=%i)\n", stream_index);

  1954.         return -1;

  1955.     }

  1956.     sc = mov->streams[mov_idx];

  1957. 

  1958.     sample_time *= s->streams[stream_index]->time_base.num;

  1959. 

  1960.     // Step 1. Find the edit that contains the requested time (elst)

  1961.     if (sc->edit_count && 0) {

  1962.         // FIXME should handle edit list

  1963.         av_log(s, AV_LOG_ERROR, "mov: does not handle seeking in files that contain edit list (c:%d)\n", sc->edit_count);

  1964.         return -1;

  1965.     }

  1966. 

  1967.     // Step 2. Find the corresponding sample using the Time-to-sample atom (stts) */

  1968.     dprintf("Searching for time %li in stream #%i (time_scale=%i)\n", (long)sample_time, mov_idx, sc->time_scale);

  1969.     start_time = 0; // FIXME use elst atom

  1970.     sample = 1; // sample are 0 based in table

  1971. 

  1972.     for (i = 0; i < sc->stts_count; i++) {

  1973.         count = sc->stts_data[i].count;

  1974.         duration = sc->stts_data[i].duration;

  1975.         if ((start_time + count*duration) > sample_time) {

  1976.             sample_to_time_time = start_time;

  1977.             sample_to_time_index = i;

  1978.             sample_to_time_sample = sample;

  1979.             sample += (sample_time - start_time) / duration;

  1980.             break;

  1981.         }

  1982.         sample += count;

  1983.         start_time += count * duration;

  1984.     }

  1985.     sample_to_time_time = start_time;

  1986.     sample_to_time_index = i;

  1987.     /* NOTE: despite what qt doc say, the dt value (Display Time in qt vocabulary) computed with the stts atom

  1988.        is a decoding time stamp (dts) not a presentation time stamp. And as usual dts != pts for stream with b frames */

  1989. 

  1990.     dprintf("Found time %li at sample #%u\n", (long)sample_time, sample);

  1991.     if (sample > sc->sample_count) {

  1992.         av_log(s, AV_LOG_ERROR, "mov: sample pos is too high, unable to seek (req. sample=%i, sample count=%ld)\n", sample, sc->sample_count);

  1993.         return -1;

  1994.     }

  1995. 

  1996.     // Step 3. Find the prior sync. sample using the Sync sample atom (stss)

  1997.     if (sc->keyframes) {

  1998.         a = 0;

  1999.         b = sc->keyframe_count - 1;

  2000.         while (a < b) {

  2001.             m = (a + b + 1) >> 1;

  2002.             if (sc->keyframes[m] > sample) {

  2003.                 b = m - 1;

  2004.             } else {

  2005.                 a = m;

  2006.             }

  2007.         }

  2008.         // for low latency prob: always use the previous keyframe, just uncomment the next line

  2009.         // if (a) a--;

  2010.         seek_sample = sc->keyframes[a];

  2011.     }

  2012.     else

  2013.         seek_sample = sample; // else all samples are key frames

  2014.     dprintf("Found nearest keyframe at sample #%i \n", seek_sample);

  2015. 

  2016.     // Step 4. Find the chunk of the sample using the Sample-to-chunk-atom (stsc)

  2017.     for (first_chunk_sample = 1, i = 0; i < (sc->sample_to_chunk_sz - 1); i++) {

  2018.         b = (sc->sample_to_chunk[i + 1].first - sc->sample_to_chunk[i].first) * sc->sample_to_chunk[i].count;

  2019.         if (seek_sample >= first_chunk_sample && seek_sample < (first_chunk_sample + b))

  2020.             break;

  2021.         first_chunk_sample += b;

  2022.     }

  2023.     chunk = sc->sample_to_chunk[i].first + (seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count;

  2024.     left_in_chunk = sc->sample_to_chunk[i].count - (seek_sample - first_chunk_sample) % sc->sample_to_chunk[i].count;

  2025.     first_chunk_sample += ((seek_sample - first_chunk_sample) / sc->sample_to_chunk[i].count) * sc->sample_to_chunk[i].count;

  2026.     sample_to_chunk_idx = i;

  2027.     dprintf("Sample was found in chunk #%i at sample offset %i (idx %i)\n", chunk, seek_sample - first_chunk_sample, sample_to_chunk_idx);

  2028. 

  2029.     // Step 5. Find the offset of the chunk using the chunk offset atom

  2030.     if (!sc->chunk_offsets) {

  2031.         av_log(s, AV_LOG_ERROR, "mov: no chunk offset atom, unable to seek\n");

  2032.         return -1;

  2033.     }

  2034.     if (chunk > sc->chunk_count) {

  2035.         av_log(s, AV_LOG_ERROR, "mov: chunk offset atom too short, unable to seek (req. chunk=%i, chunk count=%li)\n", chunk, sc->chunk_count);

  2036.         return -1;

  2037.     }

  2038.     chunk_file_offset = sc->chunk_offsets[chunk - 1];

  2039.     dprintf("Chunk file offset is #%"PRIu64"\n", chunk_file_offset);

  2040. 

  2041.     // Step 6. Find the byte offset within the chunk using the sample size atom

  2042.     sample_file_offset = chunk_file_offset;

  2043.     if (sc->sample_size)

  2044.         sample_file_offset += (seek_sample - first_chunk_sample) * sc->sample_size;

  2045.     else {

  2046.         for (i = 0; i < (seek_sample - first_chunk_sample); i++) {

  2047.         sample_file_offset += sc->sample_sizes[first_chunk_sample + i - 1];

  2048.         }

  2049.     }

  2050.     dprintf("Sample file offset is #%"PRIu64"\n", sample_file_offset);

  2051. 

  2052.     // Step 6. Update the parser

  2053.     mov->partial = sc;

  2054.     mov->next_chunk_offset = sample_file_offset;

  2055.     // Update current stream state

  2056.     sc->current_sample = seek_sample - 1;  // zero based

  2057.     sc->left_in_chunk = left_in_chunk;

  2058.     sc->next_chunk = chunk; // +1 -1 (zero based)

  2059.     sc->sample_to_chunk_index = sample_to_chunk_idx;

  2060. 

  2061.     // Update other streams

  2062.     for (i = 0; i<mov->total_streams; i++) {

  2063.         MOVStreamContext *msc;

  2064.         if (i == mov_idx) continue;

  2065.         // Find the nearest 'next' chunk

  2066.         msc = mov->streams[i];

  2067.         a = 0;

  2068.         b = msc->chunk_count - 1;

  2069.         while (a < b) {

  2070.             m = (a + b + 1) >> 1;

  2071.             if (msc->chunk_offsets[m] > chunk_file_offset) {

  2072.                 b = m - 1;

  2073.             } else {

  2074.                 a = m;

  2075.             }

  2076.         }

  2077.         msc->next_chunk = a;

  2078.         if (msc->chunk_offsets[a] < chunk_file_offset && a < (msc->chunk_count-1))

  2079.             msc->next_chunk ++;

  2080.         dprintf("Nearest next chunk for stream #%i is #%li @%"PRId64"\n", i, msc->next_chunk+1, msc->chunk_offsets[msc->next_chunk]);

  2081. 

  2082.         // Compute sample count and index in the sample_to_chunk table (what a pity)

  2083.         msc->sample_to_chunk_index = 0;

  2084.         msc->current_sample = 0;

  2085.         for(;  msc->sample_to_chunk_index < (msc->sample_to_chunk_sz - 1)

  2086.             && msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first <= (1 + msc->next_chunk); msc->sample_to_chunk_index++) {

  2087.             msc->current_sample += (msc->sample_to_chunk[msc->sample_to_chunk_index + 1].first - msc->sample_to_chunk[msc->sample_to_chunk_index].first) \

  2088.             * msc->sample_to_chunk[msc->sample_to_chunk_index].count;

  2089.         }

  2090.         msc->current_sample += (msc->next_chunk - (msc->sample_to_chunk[msc->sample_to_chunk_index].first - 1)) * sc->sample_to_chunk[msc->sample_to_chunk_index].count;

  2091.         msc->left_in_chunk = msc->sample_to_chunk[msc->sample_to_chunk_index].count - 1;

  2092.         // Find corresponding position in stts (used later to compute dts)

  2093.         sample = 0;

  2094.         start_time = 0;

  2095.         for (msc->sample_to_time_index = 0; msc->sample_to_time_index < msc->stts_count; msc->sample_to_time_index++) {

  2096.             count = msc->stts_data[msc->sample_to_time_index].count;

  2097.             duration = msc->stts_data[msc->sample_to_time_index].duration;

  2098.             if ((sample + count - 1) > msc->current_sample) {

  2099.                 msc->sample_to_time_time = start_time;

  2100.                 msc->sample_to_time_sample = sample;

  2101.                 break;

  2102.             }

  2103.             sample += count;

  2104.             start_time += count * duration;

  2105.         }

  2106.         sample = 0;

  2107.         for (msc->sample_to_ctime_index = 0; msc->sample_to_ctime_index < msc->ctts_count; msc->sample_to_ctime_index++) {

  2108.             count = msc->ctts_data[msc->sample_to_ctime_index].count;

  2109.             duration = msc->ctts_data[msc->sample_to_ctime_index].duration;

  2110.             if ((sample + count - 1) > msc->current_sample) {

  2111.                 msc->sample_to_ctime_sample = sample;

  2112.                 break;

  2113.             }

  2114.             sample += count;

  2115.         }

  2116.         dprintf("Next Sample for stream #%i is #%li @%li\n", i, msc->current_sample + 1, msc->sample_to_chunk_index + 1);

  2117.     }

  2118.     return 0;

  2119. }

  2120. #endif

  2121. 

  2122. static int mov_read_close(AVFormatContext *s)

  2123. {

  2124.     int i;

  2125.     MOVContext *mov = (MOVContext *) s->priv_data;

  2126.     for(i=0; i<mov->total_streams; i++)

  2127.         mov_free_stream_context(mov->streams[i]);

  2128.     /* free color tabs */

  2129.     for(i=0; i<mov->ctab_size; i++)

  2130.         av_freep(&mov->ctab[i]);

  2131.     av_freep(&mov->ctab);

  2132.     return 0;

  2133. }

  2134. 

  2135. static AVInputFormat mov_iformat = {

  2136.     "mov,mp4,m4a,3gp,3g2,mj2",

  2137.     "QuickTime/MPEG4/Motion JPEG 2000 format",

  2138.     sizeof(MOVContext),

  2139.     mov_probe,

  2140.     mov_read_header,

  2141.     mov_read_packet,

  2142.     mov_read_close,

  2143. #if defined(MOV_SEEK)

  2144.     mov_read_seek,

  2145. #endif

  2146. };

  2147. 

  2148. int mov_init(void)

  2149. {

  2150.     av_register_input_format(&mov_iformat);

  2151.     return 0;

  2152. }