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FFmpeg/libav/mov.c

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  1. /*

  2.  * MOV decoder.

  3.  * Copyright (c) 2001 Gerard Lantau.

  4.  *

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

  6.  * it under the terms of the GNU General Public License as published by

  7.  * the Free Software Foundation; either version 2 of the License, or

  8.  * (at your option) any later version.

  9.  *

  10.  * This program 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

  13.  * GNU General Public License for more details.

  14.  *

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

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

  17.  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

  18.  */

  19. #include "avformat.h"

  20. #include "avi.h"

  21. 

  22. /*

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

  24.  * 

  25.  * Features and limitations:

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

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

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

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

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

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

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

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

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

  35.  * 

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

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

  38.  * 

  39.  * Reference documents:

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

  41.  * Apple:

  42.  *  http://developer.apple.com/techpubs/quicktime/qtdevdocs/QTFF/qtff.html

  43.  *  http://developer.apple.com/techpubs/quicktime/qtdevdocs/PDF/QTFileFormat.pdf

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

  45.  */

  46. 

  47. //#define DEBUG

  48. 

  49. #ifdef DEBUG

  50. /*

  51.  * XXX: static sux, even more in a multithreaded environment...

  52.  * Avoid them. This is here just to help debugging.

  53.  */

  54. static int debug_indent = 0;

  55. void print_atom(const char *str, UINT32 type, UINT64 offset, UINT64 size)

  56. {

  57.     unsigned int tag, i;

  58.     tag = (unsigned int) type;

  59.     i=debug_indent;

  60.     if(tag == 0) tag = MKTAG('N', 'U', 'L', 'L');

  61.     while(i--)

  62.         printf("|");

  63.     printf("parse:");

  64.     printf(" %s: tag=%c%c%c%c offset=%d size=0x%x\n",

  65.            str, tag & 0xff,

  66.            (tag >> 8) & 0xff,

  67.            (tag >> 16) & 0xff,

  68.            (tag >> 24) & 0xff,

  69.            (unsigned int)offset,

  70.            (unsigned int)size);

  71. }

  72. #endif

  73. 

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

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

  76. /* getting rid of these */

  77. #define CODEC_TYPE_MOV_OTHER 2

  78. 

  79. static const CodecTag mov_video_tags[] = {

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

  81. /*  { CODEC_ID_JPEG, MKTAG('j', 'p', 'e', 'g') }, *//* JPEG */

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

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

  84. /* Graphics */

  85. /* Animation */

  86. /* Apple video */

  87. /* Kodak Photo CD */

  88. /*    { CODEC_ID_JPEG, MKTAG('j', 'p', 'e', 'g') }, *//* JPEG ? */

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

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

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

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

  93. /* Sorenson video */

  94.     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') }, /* OpenDiVX *//* yeah ! */

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

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

  97.     { 0, 0 }, 

  98. };

  99. 

  100. static const CodecTag mov_audio_tags[] = {

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

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

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

  104.     { CODEC_ID_PCM_U8, 0x20776172 }, /* 8 bits unsigned */

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

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

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

  108. /*    { CODEC_ID_, MKTAG('i', 'm', 'a', '4') }, *//* IMA-4 */

  109. 

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

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

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

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

  114. /* MP4 tags */

  115. /*    { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') }, *//* MPEG 4 AAC or audio ? */

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

  117.     { 0, 0 }, 

  118. };

  119. 

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

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

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

  123.  */

  124. 

  125. typedef struct MOV_sample_to_chunk_tbl {

  126.     long first;

  127.     long count;

  128.     long id;

  129. } MOV_sample_to_chunk_tbl;

  130. 

  131. typedef struct MOVStreamContext {

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

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

  134.     long next_chunk;

  135.     long chunk_count;

  136.     INT64 *chunk_offsets;

  137.     long sample_to_chunk_sz;

  138.     MOV_sample_to_chunk_tbl *sample_to_chunk;

  139.     long sample_size;

  140.     long sample_count;

  141.     long *sample_sizes;

  142. } MOVStreamContext;

  143. 

  144. typedef struct MOVContext {

  145.     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) */

  146.     AVFormatContext *fc;

  147.     long time_scale;

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

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

  150.     INT64 mdat_size;

  151.     INT64 mdat_offset;

  152.     int total_streams;

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

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

  155.      */

  156.     MOVStreamContext *streams[MAX_STREAMS];

  157.     

  158.     INT64 next_chunk_offset;

  159. } MOVContext;

  160. 

  161. 

  162. struct MOVParseTableEntry;

  163. 

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

  165. 

  166. /* those functions parse an atom */

  167. /* return code:

  168.  1: found what I wanted, exit

  169.  0: continue to parse next atom

  170.  -1: error occured, exit

  171.  */

  172. typedef int (*mov_parse_function)(const struct MOVParseTableEntry *parse_table,

  173.                                   ByteIOContext *pb,

  174.                                   UINT32 atom_type,

  175.                                   INT64 atom_offset, /* after the size and type field (and eventually the extended size) */

  176.                                   INT64 atom_size, /* total size (excluding the size and type fields) */

  177.                                   void *param);

  178. 

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

  180. typedef struct MOVParseTableEntry {

  181.     UINT32 type;

  182.     mov_parse_function func;

  183. } MOVParseTableEntry;

  184. 

  185. static int parse_leaf(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  186. {

  187. #ifdef DEBUG

  188.     print_atom("leaf", atom_type, atom_offset, atom_size);

  189. #endif

  190.     if(atom_size>1)

  191.         url_fskip(pb, atom_size);

  192. /*        url_seek(pb, atom_offset+atom_size, SEEK_SET); */

  193.     return 0;

  194. }

  195. 

  196. 

  197. static int parse_default(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  198. {

  199.     UINT32 type, foo=0;

  200.     UINT64 offset, size;

  201.     UINT64 total_size = 0;

  202.     int i;

  203.     int err = 0;

  204.     foo=0;

  205. #ifdef DEBUG

  206.     print_atom("default", atom_type, atom_offset, atom_size);

  207.     debug_indent++;

  208. #endif

  209.     

  210.     offset = atom_offset;

  211. 

  212.     if(atom_size < 0)

  213.         atom_size = 0x0FFFFFFFFFFFFFFF;

  214.     while((total_size < atom_size) && !url_feof(pb) && !err) {

  215.         size=atom_size;

  216.         type=0L;

  217.         if(atom_size >= 8) {

  218.             size = get_be32(pb);

  219.             type = get_le32(pb);

  220.         }

  221.         total_size += 8;

  222.         offset+=8;

  223. //        printf("type: %08lx  sz: %08lx", type, size);

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

  225.             size = get_be64(pb);

  226.             offset+=8;

  227.             total_size+=8;

  228.             size-=8;

  229.         }

  230.         if(size == 0)

  231.             size = atom_size - total_size;

  232.         size-=8;

  233.         for(i=0; parse_table[i].type != 0L && parse_table[i].type != type; i++);

  234.         

  235. //        printf(" i=%ld\n", i);

  236. 	if (parse_table[i].type == 0) { /* skip leaf atoms data */

  237. //            url_seek(pb, atom_offset+atom_size, SEEK_SET);

  238. #ifdef DEBUG

  239.             print_atom("unknown", type, offset, size);

  240. #endif

  241.             url_fskip(pb, size);

  242.         } else

  243.             err = (parse_table[i].func)(parse_table, pb, type, offset, size, param);

  244. 

  245.         offset+=size;

  246.         total_size+=size;

  247.     }

  248. 

  249. #ifdef DEBUG

  250.     debug_indent--;

  251. #endif

  252.     return err;

  253. }

  254. 

  255. static int parse_mvhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  256. {

  257.     MOVContext *c;

  258. #ifdef DEBUG

  259.     print_atom("mvhd", atom_type, atom_offset, atom_size);

  260. #endif

  261.     c = (MOVContext *)param;

  262. 

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

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

  265. 

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

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

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

  269.     get_be32(pb); /* duration */

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

  271.     

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

  273. 

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

  275. 

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

  277. 

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

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

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

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

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

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

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

  285.     

  286.     return 0;

  287. }

  288. 

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

  290. static int parse_moov(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  291. {

  292.     int err;

  293.     MOVContext *c;

  294. #ifdef DEBUG

  295.     print_atom("moov", atom_type, atom_offset, atom_size);

  296. #endif

  297.     c = (MOVContext *)param;

  298. 

  299.     err = parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);

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

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

  302.     c->found_moov=1;

  303.     if(c->found_mdat)

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

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

  306. }

  307. 

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

  309. static int parse_mdat(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  310. {

  311.     MOVContext *c;

  312. #ifdef DEBUG

  313.     print_atom("mdat", atom_type, atom_offset, atom_size);

  314. #endif

  315.     c = (MOVContext *)param;

  316. 

  317.     if(atom_size == 0) /* wrong one (MP4) */

  318.         return 0;

  319.     c->found_mdat=1;

  320.     c->mdat_offset = atom_offset;

  321.     c->mdat_size = atom_size;

  322.     if(c->found_moov)

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

  324.     url_fskip(pb, atom_size);

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

  326. }

  327. 

  328. static int parse_trak(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  329. {

  330.     MOVContext *c;

  331.     AVStream *st;

  332.     MOVStreamContext *sc;

  333. #ifdef DEBUG

  334.     print_atom("trak", atom_type, atom_offset, atom_size);

  335. #endif

  336. 

  337.     c = (MOVContext *)param;

  338.     st = av_malloc(sizeof(AVStream));

  339.     if (!st) return -2;

  340.     memset(st, 0, sizeof(AVStream));

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

  342.     sc = av_malloc(sizeof(MOVStreamContext));

  343.     st->priv_data = sc;

  344.     st->codec.codec_type = CODEC_TYPE_MOV_OTHER;

  345.     c->streams[c->fc->nb_streams++] = sc;

  346.     return parse_default(parse_table, pb, atom_type, atom_offset, atom_size, param);

  347. }

  348. 

  349. static int parse_tkhd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  350. {

  351.     MOVContext *c;

  352.     AVStream *st;

  353. #ifdef DEBUG

  354.     print_atom("tkhd", atom_type, atom_offset, atom_size);

  355. #endif

  356. 

  357.     c = (MOVContext *)param;

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

  359.     

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

  361. 

  362.     get_byte(pb); get_byte(pb);

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

  364.     /*

  365.     MOV_TRACK_ENABLED 0x0001

  366.     MOV_TRACK_IN_MOVIE 0x0002

  367.     MOV_TRACK_IN_PREVIEW 0x0004

  368.     MOV_TRACK_IN_POSTER 0x0008

  369.     */

  370. 

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

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

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

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

  375.     get_be32(pb); /* duration */

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

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

  378.     

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

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

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

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

  383. 

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

  385. 

  386.     /* those are fixed-point */

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

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

  389.     

  390.     return 0;

  391. }

  392. 

  393. static int parse_hdlr(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  394. {

  395.     MOVContext *c;

  396.     int len;

  397.     char *buf;

  398.     UINT32 type;

  399.     AVStream *st;

  400.     UINT32 ctype;

  401. #ifdef DEBUG

  402.     print_atom("hdlr", atom_type, atom_offset, atom_size);

  403. #endif

  404.     c = (MOVContext *)param;

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

  406. 

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

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

  409. 

  410.     /* component type */

  411.     ctype = get_le32(pb);

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

  413. 

  414. #ifdef DEBUG

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

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

  417. #endif

  418. #ifdef DEBUG

  419. /* XXX: yeah this is ugly... */

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

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

  422.             puts("hdlr: vide");

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

  424.             puts("hdlr: soun");

  425.     } else if(ctype == 0) { /* MP4 */

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

  427.             puts("hdlr: vide");

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

  429.             puts("hdlr: soun");

  430.         else if(type == MKTAG('o', 'd', 's', 'm'))

  431.             puts("hdlr: odsm");

  432.         else if(type == MKTAG('s', 'd', 's', 'm'))

  433.             puts("hdlr: sdsm");

  434.     } else puts("hdlr: meta");

  435. #endif

  436. 

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

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

  439.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  441.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  442.     } else if(ctype == 0) { /* MP4 */

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

  444.             st->codec.codec_type = CODEC_TYPE_VIDEO;

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

  446.             st->codec.codec_type = CODEC_TYPE_AUDIO;

  447.     }

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

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

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

  451. 

  452.     if(atom_size <= 24)

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

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

  455.     /* component name */

  456.     len = get_byte(pb);

  457.     /* XXX: use a better heuristic */

  458.     if(len < 32) {

  459.         /* assume that it is a Pascal like string */

  460.         buf = av_malloc(len+1);

  461.         get_buffer(pb, buf, len);

  462.         buf[len] = '\0';

  463. #ifdef DEBUG

  464.         printf("**buf='%s'\n", buf);

  465. #endif

  466.         av_free(buf);

  467.     } else {

  468.         /* MP4 string */

  469.         for(;;) {

  470.             if (len == 0)

  471.                 break;

  472.             len = get_byte(pb);

  473.         }

  474.     }

  475.     

  476.     return 0;

  477. }

  478. 

  479. static int parse_stsd(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  480. {

  481.     MOVContext *c;

  482.     int entries, size, samp_sz, frames_per_sample;

  483.     UINT32 format;

  484.     AVStream *st;

  485. #ifdef DEBUG

  486.     print_atom("stsd", atom_type, atom_offset, atom_size);

  487. #endif

  488.     c = (MOVContext *)param;

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

  490. 

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

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

  493. 

  494. 

  495.     entries = get_be32(pb);

  496. 

  497.     while(entries--) {

  498.         size = get_be32(pb); /* size */

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

  500.         

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

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

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

  504. /*        if(format == MKTAG('m', 'p', '4', 'v')) */

  505. /*            st->codec.codec_type=CODEC_TYPE_VIDEO; *//* force things (XXX: was this for .mp4 ?) */

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

  507.             st->codec.codec_tag = format;

  508.             st->codec.codec_id = codec_get_id(mov_video_tags, format);

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

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

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

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

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

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

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

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

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

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

  519.             frames_per_sample = get_be16(pb); /* frame per samples */

  520. #ifdef DEBUG

  521. 	    printf("frames/samples = %d\n", frames_per_sample);

  522. #endif

  523.             url_fskip(pb, 32); /* codec name */

  524. 

  525.             get_be16(pb); /* depth */

  526.             get_be16(pb); /* colortable id */

  527.             get_be16(pb); /*  */

  528.             get_be16(pb); /*  */

  529.             

  530.             st->codec.sample_rate = 25 * FRAME_RATE_BASE;

  531.             

  532.             if(size > 16)

  533.                 url_fskip(pb, size-(16+24+18+32));

  534.         } else {

  535.             st->codec.codec_tag = format;

  536. 

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

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

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

  540. 

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

  542.             samp_sz = get_be16(pb); /* sample size */

  543. #ifdef DEBUG

  544.             if(samp_sz != 16)

  545.                 puts("!!! stsd: audio sample size is not 16 bit !");

  546. #endif            

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

  548.             /* handle specific s8 codec */

  549.             if (st->codec.codec_id == CODEC_ID_PCM_S16BE && samp_sz == 8)

  550.             st->codec.codec_id = CODEC_ID_PCM_S8;

  551. 

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

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

  554.             

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

  556.             st->codec.bit_rate = 0;

  557. 

  558.             /* this is for .mp4 files */

  559.             if(format == MKTAG('m', 'p', '4', 'v')) { /* XXX */

  560.                 st->codec.codec_type=CODEC_TYPE_VIDEO; /* force things */

  561.                 st->codec.codec_id = CODEC_ID_MPEG4;

  562.                 st->codec.frame_rate = 25;

  563.                 st->codec.bit_rate = 100000;

  564.             }

  565. 

  566. #if 0

  567. 

  568.             get_be16(pb); get_be16(pb); /*  */

  569.             get_be16(pb); /*  */

  570.             get_be16(pb); /*  */

  571.             get_be16(pb); /*  */

  572.             get_be16(pb); /*  */

  573. #endif            

  574.             if(size > 16)

  575.                 url_fskip(pb, size-(16+20));

  576.         }

  577. #ifdef DEBUG

  578.         printf("4CC= %c%c%c%c\n", *((char *)&format), ((char *)&format)[1], ((char *)&format)[2], ((char *)&format)[3]);

  579. #endif

  580.     }

  581. /*

  582.     if(len) {

  583.     buf = av_malloc(len+1);

  584.         get_buffer(pb, buf, len);

  585.         buf[len] = '\0';

  586.         puts(buf);

  587.         av_free(buf);

  588.     }

  589. */

  590.     return 0;

  591. }

  592. 

  593. static int parse_stco(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  594. {

  595.     MOVContext *c;

  596.     int entries, i;

  597.     AVStream *st;

  598.     MOVStreamContext *sc;

  599. #ifdef DEBUG

  600.     print_atom("stco", atom_type, atom_offset, atom_size);

  601. #endif

  602.     c = (MOVContext *)param;

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

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

  605.     

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

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

  608. 

  609.     entries = get_be32(pb);

  610.     sc->chunk_count = entries;

  611.     sc->chunk_offsets = av_malloc(entries * sizeof(INT64));

  612.     if(atom_type == MKTAG('s', 't', 'c', 'o')) {

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

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

  615.             /*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/

  616.         }

  617.     } else if(atom_type == MKTAG('c', 'o', '6', '4')) {

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

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

  620.             /*printf("chunk offset=%ld\n", sc->chunk_offsets[i]);*/

  621.         }

  622.     } else

  623.         return -1;

  624.     return 0;

  625. }

  626. 

  627. static int parse_stsc(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  628. {

  629.     MOVContext *c;

  630.     int entries, i;

  631.     AVStream *st;

  632.     MOVStreamContext *sc;

  633. #ifdef DEBUG

  634.     print_atom("stsc", atom_type, atom_offset, atom_size);

  635. #endif

  636.     c = (MOVContext *)param;

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

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

  639.     

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

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

  642. 

  643.     entries = get_be32(pb);

  644.     sc->sample_to_chunk_sz = entries;

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

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

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

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

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

  650. #ifdef DEBUG

  651. /*        printf("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); */

  652. #endif

  653.     }

  654.     return 0;

  655. }

  656. 

  657. static int parse_stsz(const MOVParseTableEntry *parse_table, ByteIOContext *pb, UINT32 atom_type, INT64 atom_offset, INT64 atom_size, void *param)

  658. {

  659.     MOVContext *c;

  660.     int entries, i;

  661.     AVStream *st;

  662.     MOVStreamContext *sc;

  663. #ifdef DEBUG

  664.     print_atom("stsz", atom_type, atom_offset, atom_size);

  665. #endif

  666.     c = (MOVContext *)param;

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

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

  669.     

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

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

  672.     

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

  674.     entries = get_be32(pb);

  675.     sc->sample_count = entries;

  676.     printf("sample_size = %ld sample_count = %ld\n", sc->sample_size, sc->sample_count);

  677.     if(sc->sample_size)

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

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

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

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

  682. #ifdef DEBUG

  683. /*        printf("sample_sizes[]=%ld\n", sc->sample_sizes[i]); */

  684. #endif

  685.     }

  686.     return 0;

  687. }

  688. 

  689. static const MOVParseTableEntry mov_default_parse_table[] = {

  690. /* mp4 atoms */

  691. { MKTAG( 'm', 'p', '4', 'a' ), parse_default },

  692. { MKTAG( 'c', 'o', '6', '4' ), parse_stco },

  693. { MKTAG( 's', 't', 'c', 'o' ), parse_stco },

  694. { MKTAG( 'c', 'r', 'h', 'd' ), parse_default },

  695. { MKTAG( 'c', 't', 't', 's' ), parse_leaf },

  696. { MKTAG( 'c', 'p', 'r', 't' ), parse_default },

  697. { MKTAG( 'u', 'r', 'l', ' ' ), parse_leaf },

  698. { MKTAG( 'u', 'r', 'n', ' ' ), parse_leaf },

  699. { MKTAG( 'd', 'i', 'n', 'f' ), parse_default },

  700. { MKTAG( 'd', 'r', 'e', 'f' ), parse_leaf },

  701. { MKTAG( 's', 't', 'd', 'p' ), parse_default },

  702. { MKTAG( 'e', 's', 'd', 's' ), parse_default },

  703. { MKTAG( 'e', 'd', 't', 's' ), parse_default },

  704. { MKTAG( 'e', 'l', 's', 't' ), parse_leaf },

  705. { MKTAG( 'u', 'u', 'i', 'd' ), parse_default },

  706. { MKTAG( 'f', 'r', 'e', 'e' ), parse_leaf },

  707. { MKTAG( 'h', 'd', 'l', 'r' ), parse_hdlr },

  708. { MKTAG( 'h', 'm', 'h', 'd' ), parse_default },

  709. { MKTAG( 'h', 'i', 'n', 't' ), parse_leaf },

  710. { MKTAG( 'n', 'm', 'h', 'd' ), parse_leaf },

  711. { MKTAG( 'm', 'p', '4', 's' ), parse_default },

  712. { MKTAG( 'm', 'd', 'i', 'a' ), parse_default },

  713. { MKTAG( 'm', 'd', 'a', 't' ), parse_mdat },

  714. { MKTAG( 'm', 'd', 'h', 'd' ), parse_leaf },

  715. { MKTAG( 'm', 'i', 'n', 'f' ), parse_default },

  716. { MKTAG( 'm', 'o', 'o', 'v' ), parse_moov },

  717. { MKTAG( 'm', 'v', 'h', 'd' ), parse_mvhd },

  718. { MKTAG( 'i', 'o', 'd', 's' ), parse_leaf },

  719. { MKTAG( 'o', 'd', 'h', 'd' ), parse_default },

  720. { MKTAG( 'm', 'p', 'o', 'd' ), parse_leaf },

  721. { MKTAG( 's', 't', 's', 'd' ), parse_stsd },

  722. { MKTAG( 's', 't', 's', 'z' ), parse_stsz },

  723. { MKTAG( 's', 't', 'b', 'l' ), parse_default },

  724. { MKTAG( 's', 't', 's', 'c' ), parse_stsc },

  725. { MKTAG( 's', 'd', 'h', 'd' ), parse_default },

  726. { MKTAG( 's', 't', 's', 'h' ), parse_default },

  727. { MKTAG( 's', 'k', 'i', 'p' ), parse_default },

  728. { MKTAG( 's', 'm', 'h', 'd' ), parse_leaf },

  729. { MKTAG( 'd', 'p', 'n', 'd' ), parse_leaf },

  730. { MKTAG( 's', 't', 's', 's' ), parse_leaf },

  731. { MKTAG( 's', 't', 't', 's' ), parse_leaf },

  732. { MKTAG( 't', 'r', 'a', 'k' ), parse_trak },

  733. { MKTAG( 't', 'k', 'h', 'd' ), parse_tkhd },

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

  735. { MKTAG( 'u', 'd', 't', 'a' ), parse_leaf },

  736. { MKTAG( 'v', 'm', 'h', 'd' ), parse_leaf },

  737. { MKTAG( 'm', 'p', '4', 'v' ), parse_default },

  738. /* extra mp4 */

  739. { MKTAG( 'M', 'D', 'E', 'S' ), parse_leaf },

  740. /* QT atoms */

  741. { MKTAG( 'c', 'h', 'a', 'p' ), parse_leaf },

  742. { MKTAG( 'c', 'l', 'i', 'p' ), parse_default },

  743. { MKTAG( 'c', 'r', 'g', 'n' ), parse_leaf },

  744. { MKTAG( 'k', 'm', 'a', 't' ), parse_leaf },

  745. { MKTAG( 'm', 'a', 't', 't' ), parse_default },

  746. { MKTAG( 'r', 'd', 'r', 'f' ), parse_leaf },

  747. { MKTAG( 'r', 'm', 'd', 'a' ), parse_default },

  748. { MKTAG( 'r', 'm', 'd', 'r' ), parse_leaf },

  749. //{ MKTAG( 'r', 'm', 'q', 'u' ), parse_leaf },

  750. { MKTAG( 'r', 'm', 'r', 'a' ), parse_default },

  751. { MKTAG( 's', 'c', 'p', 't' ), parse_leaf },

  752. { MKTAG( 's', 'y', 'n', 'c' ), parse_leaf },

  753. { MKTAG( 's', 's', 'r', 'c' ), parse_leaf },

  754. { MKTAG( 't', 'c', 'm', 'd' ), parse_leaf },

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

  756. { 0L, parse_leaf }

  757. };

  758. 

  759. static void mov_free_stream_context(MOVStreamContext *sc)

  760. {

  761.     if(sc) {

  762.         av_free(sc->chunk_offsets);

  763.         av_free(sc->sample_to_chunk);

  764.         av_free(sc);

  765.     }

  766. }

  767. 

  768. /* XXX: is it suffisant ? */

  769. static int mov_probe(AVProbeData *p)

  770. {

  771.     /* check file header */

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

  773.         return 0;

  774.     if ((p->buf[4] == 'm' && p->buf[5] == 'o' &&

  775.          p->buf[6] == 'o' && p->buf[7] == 'v') ||

  776.         (p->buf[4] == 'm' && p->buf[5] == 'd' &&

  777.          p->buf[6] == 'a' && p->buf[7] == 't'))

  778.         return AVPROBE_SCORE_MAX;

  779.     else

  780.         return 0;

  781. }

  782. 

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

  784. {

  785.     MOVContext *mov = s->priv_data;

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

  787.     int i, j, nb, err;

  788.     INT64 size;

  789. 

  790.     mov->fc = s;

  791. #if 0

  792.     /* XXX: I think we should auto detect */

  793.     if(s->iformat->name[1] == 'p')

  794.         mov->mp4 = 1;

  795. #endif

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

  797.         size = url_filesize(url_fileno(pb));

  798.     else

  799.         size = 0x7FFFFFFFFFFFFFFF;

  800. 

  801. #ifdef DEBUG

  802.     printf("filesz=%Ld\n", size);

  803. #endif

  804. 

  805.     /* check MOV header */

  806.     err = parse_default(mov_default_parse_table, pb, 0L, 0LL, size, mov);

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

  808.         puts("header not found !!!");

  809.         exit(1);

  810.     }

  811. #ifdef DEBUG

  812.     printf("on_parse_exit_offset=%d\n", (int) url_ftell(pb));

  813. #endif

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

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

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

  817. 

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

  819. 

  820. #ifdef DEBUG

  821.     printf("mdat_reset_offset=%d\n", (int) url_ftell(pb));

  822. #endif

  823. 

  824. #ifdef DEBUG

  825.     printf("streams= %d\n", s->nb_streams);

  826. #endif

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

  828.     

  829. #if 1

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

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

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

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

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

  835.             s->nb_streams--;

  836.         } else

  837.             i++;

  838.     }

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

  840.         MOVStreamContext *sc;

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

  842.         sc->ffindex = i;

  843.         sc->is_ff_stream = 1;

  844.     }

  845. #endif

  846. #ifdef DEBUG

  847.     printf("real streams= %d\n", s->nb_streams);

  848. #endif

  849.     return 0;

  850. }

  851. 

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

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

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

  855. {

  856.     MOVContext *mov = s->priv_data;

  857.     INT64 offset = 0x0FFFFFFFFFFFFFFF;

  858.     int i;

  859.     int st_id = 0, size;

  860.     size = 0x0FFFFFFF;

  861.     

  862. again:

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

  864. /*        printf("%8ld ", mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk]); */

  865.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  866.         && (mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] < offset)) {

  867. /*            printf("y"); */

  868.             st_id = i;

  869.             offset = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk];

  870.         }

  871. /*         else printf("n"); */

  872.     }

  873.     mov->streams[st_id]->next_chunk++;

  874.     if(offset==0x0FFFFFFFFFFFFFFF)

  875.         return -1;

  876.     

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

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

  879.     if(!mov->streams[st_id]->is_ff_stream) {

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

  881.         offset = 0x0FFFFFFFFFFFFFFF;

  882. /*        puts("*"); */

  883.         goto again;

  884.     }

  885. /* printf("\nchunk offset = %ld\n", offset); */

  886. 

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

  888. 

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

  890. /*        printf("%ld ", mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset); */

  891.         if((mov->streams[i]->next_chunk < mov->streams[i]->chunk_count)

  892.         && ((mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset) < size)) {

  893. /*            printf("y"); */

  894.             size = mov->streams[i]->chunk_offsets[mov->streams[i]->next_chunk] - offset;

  895.         }

  896. /*         else printf("n"); */

  897.     }

  898. /* printf("\nchunk size = %ld\n", size); */

  899.     if(size == 0x0FFFFFFF)

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

  901.     if(size < 0)

  902.         return -1;

  903.     if(size == 0)

  904.         return -1;

  905.     av_new_packet(pkt, size);

  906.     pkt->stream_index = mov->streams[st_id]->ffindex;

  907. 

  908.     get_buffer(&s->pb, pkt->data, pkt->size);

  909. 

  910. #ifdef DEBUG

  911. /*

  912.     printf("Packet (%d, %d, %ld) ", pkt->stream_index, st_id, pkt->size);

  913.     for(i=0; i<8; i++)

  914.         printf("%02x ", pkt->data[i]);

  915.     for(i=0; i<8; i++)

  916.         printf("%c ", (pkt->data[i]) & 0x7F);

  917.     puts("");

  918. */

  919. #endif

  920. 

  921.     mov->next_chunk_offset = offset + size;

  922. 

  923.     return 0;

  924. }

  925. 

  926. static int mov_read_close(AVFormatContext *s)

  927. {

  928.     int i;

  929.     MOVContext *mov = s->priv_data;

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

  931.         mov_free_stream_context(mov->streams[i]);

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

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

  934.     return 0;

  935. }

  936. 

  937. static AVInputFormat mov_iformat = {

  938.     "mov",

  939.     "QuickTime/MPEG4 format",

  940.     sizeof(MOVContext),

  941.     mov_probe,

  942.     mov_read_header,

  943.     mov_read_packet,

  944.     mov_read_close,

  945. };

  946. 

  947. int mov_init(void)

  948. {

  949.     av_register_input_format(&mov_iformat);

  950.     return 0;

  951. }