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FFmpeg/libavformat/movenc.c

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  1. /*

  2.  * MOV, 3GP, MP4 encoder.

  3.  * Copyright (c) 2003 Thomas Raivio.

  4.  * Copyright (c) 2004 Gildas Bazin <gbazin at videolan dot org>.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

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

  18.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  19.  */

  20. #include "avformat.h"

  21. #include "avi.h"

  22. #include "avio.h"

  23. 

  24. #undef NDEBUG

  25. #include <assert.h>

  26. 

  27. #define MOV_INDEX_CLUSTER_SIZE 16384

  28. #define globalTimescale 1000

  29. 

  30. #define MODE_MP4 0

  31. #define MODE_MOV 1

  32. #define MODE_3GP 2

  33. 

  34. typedef struct MOVIentry {

  35.     unsigned int flags, pos, size;

  36.     unsigned int samplesInChunk;

  37.     char         key_frame;

  38.     unsigned int entries;

  39. } MOVIentry;

  40. 

  41. typedef struct MOVIndex {

  42.     int         mode;

  43.     int         entry;

  44.     int         mdat_size;

  45.     int         ents_allocated;

  46.     long        timescale;

  47.     long        time;

  48.     long        trackDuration;

  49.     long        sampleCount;

  50.     long        sampleDuration;

  51.     int         hasKeyframes;

  52.     int         trackID;

  53.     AVCodecContext *enc;

  54. 

  55.     int         vosLen;

  56.     uint8_t     *vosData;

  57.     MOVIentry** cluster;

  58. } MOVTrack;

  59. 

  60. typedef struct {

  61.     int     mode;

  62.     long    time;

  63.     int     nb_streams;

  64.     int     mdat_written;

  65.     offset_t mdat_pos;

  66.     long    timescale;

  67.     MOVTrack tracks[MAX_STREAMS];

  68. } MOVContext;

  69. 

  70. static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track);

  71. 

  72. //FIXME supprt 64bit varaint with wide placeholders

  73. static int updateSize (ByteIOContext *pb, int pos)

  74. {

  75.     long curpos = url_ftell(pb);

  76.     url_fseek(pb, pos, SEEK_SET);

  77.     put_be32(pb, curpos - pos); /* rewrite size */

  78.     url_fseek(pb, curpos, SEEK_SET);

  79. 

  80.     return curpos - pos;

  81. }

  82. 

  83. /* Chunk offset atom */

  84. static int mov_write_stco_tag(ByteIOContext *pb, MOVTrack* track)

  85. {

  86.     int i;

  87.     int pos = url_ftell(pb);

  88.     put_be32(pb, 0); /* size */

  89.     put_tag(pb, "stco");

  90.     put_be32(pb, 0); /* version & flags */

  91.     put_be32(pb, track->entry); /* entry count */

  92.     for (i=0; i<track->entry; i++) {

  93.         int cl = i / MOV_INDEX_CLUSTER_SIZE;

  94.         int id = i % MOV_INDEX_CLUSTER_SIZE;

  95.         put_be32(pb, track->cluster[cl][id].pos);

  96.     }

  97.     return updateSize (pb, pos);

  98. }

  99. 

  100. /* Sample size atom */

  101. static int mov_write_stsz_tag(ByteIOContext *pb, MOVTrack* track)

  102. {

  103.     int equalChunks = 1;

  104.     int i, j, entries = 0, tst = -1, oldtst = -1;

  105. 

  106.     int pos = url_ftell(pb);

  107.     put_be32(pb, 0); /* size */

  108.     put_tag(pb, "stsz");

  109.     put_be32(pb, 0); /* version & flags */

  110. 

  111.     for (i=0; i<track->entry; i++) {

  112.         int cl = i / MOV_INDEX_CLUSTER_SIZE;

  113.         int id = i % MOV_INDEX_CLUSTER_SIZE;

  114.         tst = track->cluster[cl][id].size/track->cluster[cl][id].entries;

  115.         if(oldtst != -1 && tst != oldtst) {

  116.             equalChunks = 0;

  117.         }

  118.         oldtst = tst;

  119.         entries += track->cluster[cl][id].entries;

  120.     }

  121.     if (equalChunks) {

  122.         int sSize = track->cluster[0][0].size/track->cluster[0][0].entries;

  123.         put_be32(pb, sSize); // sample size 

  124.         put_be32(pb, entries); // sample count

  125.     }

  126.     else {

  127.         put_be32(pb, 0); // sample size 

  128.         put_be32(pb, entries); // sample count 

  129.         for (i=0; i<track->entry; i++) {

  130.             int cl = i / MOV_INDEX_CLUSTER_SIZE;

  131.             int id = i % MOV_INDEX_CLUSTER_SIZE;

  132.             for ( j=0; j<track->cluster[cl][id].entries; j++) {

  133.                 put_be32(pb, track->cluster[cl][id].size /

  134.                          track->cluster[cl][id].entries);

  135.             }

  136.         }

  137.     }

  138.     return updateSize (pb, pos);

  139. }

  140. 

  141. /* Sample to chunk atom */

  142. static int mov_write_stsc_tag(ByteIOContext *pb, MOVTrack* track)

  143. {

  144.     int index = 0, oldval = -1, i, entryPos, curpos;

  145. 

  146.     int pos = url_ftell(pb);

  147.     put_be32(pb, 0); /* size */

  148.     put_tag(pb, "stsc");

  149.     put_be32(pb, 0); // version & flags 

  150.     entryPos = url_ftell(pb);

  151.     put_be32(pb, track->entry); // entry count 

  152.     for (i=0; i<track->entry; i++) {

  153.         int cl = i / MOV_INDEX_CLUSTER_SIZE;

  154.         int id = i % MOV_INDEX_CLUSTER_SIZE;

  155.         if(oldval != track->cluster[cl][id].samplesInChunk)

  156.         {

  157.             put_be32(pb, i+1); // first chunk 

  158.             put_be32(pb, track->cluster[cl][id].samplesInChunk); // samples per chunk

  159.             put_be32(pb, 0x1); // sample description index 

  160.             oldval = track->cluster[cl][id].samplesInChunk;

  161.             index++;

  162.         }

  163.     }

  164.     curpos = url_ftell(pb);

  165.     url_fseek(pb, entryPos, SEEK_SET);

  166.     put_be32(pb, index); // rewrite size 

  167.     url_fseek(pb, curpos, SEEK_SET);

  168. 

  169.     return updateSize (pb, pos);

  170. }

  171. 

  172. /* Sync sample atom */

  173. static int mov_write_stss_tag(ByteIOContext *pb, MOVTrack* track)

  174. {

  175.     long curpos;

  176.     int i, index = 0, entryPos;

  177.     int pos = url_ftell(pb);

  178.     put_be32(pb, 0); // size 

  179.     put_tag(pb, "stss");

  180.     put_be32(pb, 0); // version & flags 

  181.     entryPos = url_ftell(pb);

  182.     put_be32(pb, track->entry); // entry count 

  183.     for (i=0; i<track->entry; i++) {

  184.         int cl = i / MOV_INDEX_CLUSTER_SIZE;

  185.         int id = i % MOV_INDEX_CLUSTER_SIZE;

  186.         if(track->cluster[cl][id].key_frame == 1) {

  187.             put_be32(pb, i+1);

  188.             index++;

  189.         }

  190.     }

  191.     curpos = url_ftell(pb);

  192.     url_fseek(pb, entryPos, SEEK_SET);

  193.     put_be32(pb, index); // rewrite size 

  194.     url_fseek(pb, curpos, SEEK_SET);

  195.     return updateSize (pb, pos);

  196. }

  197. 

  198. static int mov_write_damr_tag(ByteIOContext *pb)

  199. {

  200.     put_be32(pb, 0x11); /* size */

  201.     put_tag(pb, "damr");

  202.     put_tag(pb, "FFMP");

  203.     put_byte(pb, 0);

  204. 

  205.     put_be16(pb, 0x80); /* Mode set (all modes for AMR_NB) */

  206.     put_be16(pb, 0xa); /* Mode change period (no restriction) */

  207.     //put_be16(pb, 0x81ff); /* Mode set (all modes for AMR_NB) */

  208.     //put_be16(pb, 1); /* Mode change period (no restriction) */

  209.     return 0x11;

  210. }

  211. 

  212. static int mov_write_wave_tag(ByteIOContext *pb, MOVTrack* track)

  213. {

  214.     int pos = url_ftell(pb);

  215. 

  216.     put_be32(pb, 0);     /* size */

  217.     put_tag(pb, "wave");

  218. 

  219.     put_be32(pb, 12);    /* size */

  220.     put_tag(pb, "frma");

  221.     put_tag(pb, "mp4a");

  222. 

  223.     put_be32(pb, 12);    /* size */

  224.     put_tag(pb, "mp4a");

  225.     put_be32(pb, 0);

  226. 

  227.     mov_write_esds_tag(pb, track);

  228. 

  229.     put_be32(pb, 12);    /* size */

  230.     put_tag(pb, "srcq");

  231.     put_be32(pb, 0x40);

  232. 

  233.     put_be32(pb, 8);     /* size */

  234.     put_be32(pb, 0);     /* null tag */

  235. 

  236.     return updateSize (pb, pos);

  237. }

  238. 

  239. const CodecTag codec_movaudio_tags[] = {

  240.     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') },

  241.     { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') },

  242.     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') },

  243.     { CODEC_ID_MACE3, MKTAG('M', 'A', 'C', '3') },

  244.     { CODEC_ID_MACE6, MKTAG('M', 'A', 'C', '6') },

  245.     { CODEC_ID_AAC, MKTAG('m', 'p', '4', 'a') },

  246.     { CODEC_ID_AMR_NB, MKTAG('s', 'a', 'm', 'r') },

  247.     { CODEC_ID_PCM_S16BE, MKTAG('t', 'w', 'o', 's') },

  248.     { CODEC_ID_PCM_S16LE, MKTAG('s', 'o', 'w', 't') },

  249.     { CODEC_ID_MP3, MKTAG('.', 'm', 'p', '3') },

  250.     { 0, 0 },

  251. };

  252. 

  253. static int mov_write_audio_tag(ByteIOContext *pb, MOVTrack* track)

  254. {

  255.     int pos = url_ftell(pb), tag;

  256.     

  257.     put_be32(pb, 0); /* size */

  258. 

  259.     tag = codec_get_tag(codec_movaudio_tags, track->enc->codec_id);

  260.     // if no mac fcc found, try with Microsoft tags

  261.     if (!tag)

  262.     {

  263. 	int tmp = codec_get_tag(codec_wav_tags, track->enc->codec_id);

  264. 	if (tmp)

  265. 	    tag = MKTAG('m', 's', ((tmp >> 8) & 0xff), (tmp & 0xff));

  266.     }

  267.     if (!tag)

  268. 	put_tag(pb, "    ");

  269.     else

  270. 	put_le32(pb, tag); // store it byteswapped

  271. 

  272.     put_be32(pb, 0); /* Reserved */

  273.     put_be16(pb, 0); /* Reserved */

  274.     put_be16(pb, 1); /* Data-reference index, XXX  == 1 */

  275. 

  276.     /* SoundDescription */

  277.     if(track->mode == MODE_MOV && track->enc->codec_id == CODEC_ID_AAC)

  278.         put_be16(pb, 1); /* Version 1 */

  279.     else

  280.         put_be16(pb, 0); /* Version 0 */

  281.     put_be16(pb, 0); /* Revision level */

  282.     put_be32(pb, 0); /* Reserved */

  283. 

  284.     put_be16(pb, track->enc->channels); /* Number of channels */

  285.     /* TODO: Currently hard-coded to 16-bit, there doesn't seem

  286.                  to be a good way to get number of bits of audio */

  287.     put_be16(pb, 0x10); /* Reserved */

  288.     put_be16(pb, 0); /* compression ID (= 0) */

  289.     put_be16(pb, 0); /* packet size (= 0) */

  290.     put_be16(pb, track->timescale); /* Time scale */

  291.     put_be16(pb, 0); /* Reserved */

  292. 

  293.     if(track->mode == MODE_MOV && track->enc->codec_id == CODEC_ID_AAC)

  294.     {

  295.         /* SoundDescription V1 extended info */

  296.         put_be32(pb, track->enc->frame_size); /* Samples per packet  */

  297.         put_be32(pb, 1536); /* Bytes per packet */

  298.         put_be32(pb, 2); /* Bytes per frame */

  299.         put_be32(pb, 2); /* Bytes per sample */

  300.     }

  301. 

  302.     if(track->enc->codec_id == CODEC_ID_AAC) {

  303.         if( track->mode == MODE_MOV ) mov_write_wave_tag(pb, track);

  304.         else mov_write_esds_tag(pb, track);

  305.     }

  306.     if(track->enc->codec_id == CODEC_ID_AMR_NB)

  307.         mov_write_damr_tag(pb);

  308.     return updateSize (pb, pos);

  309. }

  310. 

  311. static int mov_write_d263_tag(ByteIOContext *pb)

  312. {

  313.     put_be32(pb, 0xf); /* size */

  314.     put_tag(pb, "d263");

  315.     put_tag(pb, "FFMP");

  316.     put_be16(pb, 0x0a);

  317.     put_byte(pb, 0);

  318.     return 0xf;

  319. }

  320. 

  321. /* TODO: No idea about these values */

  322. static int mov_write_svq3_tag(ByteIOContext *pb)

  323. {

  324.     put_be32(pb, 0x15);

  325.     put_tag(pb, "SMI ");

  326.     put_tag(pb, "SEQH");

  327.     put_be32(pb, 0x5);

  328.     put_be32(pb, 0xe2c0211d);

  329.     put_be32(pb, 0xc0000000);

  330.     put_byte(pb, 0);   

  331.     return 0x15;

  332. }

  333. 

  334. static unsigned int descrLength(unsigned int len)

  335. {

  336.     if (len < 0x00000080)

  337.         return 2 + len;

  338.     else if (len < 0x00004000)

  339.         return 3 + len;

  340.     else if(len < 0x00200000)

  341.         return 4 + len;

  342.     else

  343.         return 5 + len;

  344. }

  345. 

  346. static void putDescr(ByteIOContext *pb, int tag, int size)

  347. {

  348.     uint32_t len;

  349.     uint8_t  vals[4];

  350. 

  351.     len = size;

  352.     vals[3] = (uint8_t)(len & 0x7f);

  353.     len >>= 7;

  354.     vals[2] = (uint8_t)((len & 0x7f) | 0x80); 

  355.     len >>= 7;

  356.     vals[1] = (uint8_t)((len & 0x7f) | 0x80); 

  357.     len >>= 7;

  358.     vals[0] = (uint8_t)((len & 0x7f) | 0x80);

  359. 

  360.     put_byte(pb, tag); // DescriptorTag

  361. 

  362.     if (size < 0x00000080)

  363.     {

  364.         put_byte(pb, vals[3]);

  365.     }

  366.     else if (size < 0x00004000)

  367.     {

  368.         put_byte(pb, vals[2]);

  369.         put_byte(pb, vals[3]);

  370.     }

  371.     else if (size < 0x00200000)

  372.     {

  373.         put_byte(pb, vals[1]);

  374.         put_byte(pb, vals[2]);

  375.         put_byte(pb, vals[3]);

  376.     }

  377.     else if (size < 0x10000000)

  378.     {

  379.         put_byte(pb, vals[0]);

  380.         put_byte(pb, vals[1]);

  381.         put_byte(pb, vals[2]);

  382.         put_byte(pb, vals[3]);

  383.     }

  384. }

  385. 

  386. static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track) // Basic

  387. {

  388.     int decoderSpecificInfoLen = track->vosLen ? descrLength(track->vosLen):0;

  389.     int pos = url_ftell(pb);

  390. 

  391.     put_be32(pb, 0);               // size

  392.     put_tag(pb, "esds");

  393.     put_be32(pb, 0);               // Version

  394. 

  395.     // ES descriptor

  396.     putDescr(pb, 0x03, 3 + descrLength(13 + decoderSpecificInfoLen) +

  397.              descrLength(1));

  398.     put_be16(pb, 0x0001);          // ID (= 1)

  399.     put_byte(pb, 0x00);            // flags (= no flags)

  400. 

  401.     // DecoderConfig descriptor

  402.     putDescr(pb, 0x04, 13 + decoderSpecificInfoLen);

  403. 

  404.     if(track->enc->codec_id == CODEC_ID_AAC)

  405.         put_byte(pb, 0x40);        // Object type indication

  406.     else if(track->enc->codec_id == CODEC_ID_MPEG4)

  407.         put_byte(pb, 0x20);        // Object type indication (Visual 14496-2)

  408. 

  409.     if(track->enc->codec_type == CODEC_TYPE_AUDIO)

  410.         put_byte(pb, 0x15);            // flags (= Audiostream)

  411.     else

  412.         put_byte(pb, 0x11);            // flags (= Visualstream)

  413. 

  414.     put_byte(pb, 0x0);             // Buffersize DB (24 bits)

  415.     put_be16(pb, 0x0dd2);          // Buffersize DB

  416. 

  417.     // TODO: find real values for these

  418.     put_be32(pb, 0x0002e918);     // maxbitrate

  419.     put_be32(pb, 0x00017e6b);     // avg bitrate

  420. 

  421.     if (track->vosLen)

  422.     {

  423.         // DecoderSpecific info descriptor

  424.         putDescr(pb, 0x05, track->vosLen);

  425.         put_buffer(pb, track->vosData, track->vosLen);

  426.     }

  427. 

  428.     // SL descriptor

  429.     putDescr(pb, 0x06, 1);

  430.     put_byte(pb, 0x02);

  431.     return updateSize (pb, pos);

  432. }

  433. 

  434. const CodecTag codec_movvideo_tags[] = {

  435.     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') },

  436.     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') },

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

  438.     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') },

  439.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') },

  440.     { 0, 0 },

  441. };

  442. 

  443. static int mov_write_video_tag(ByteIOContext *pb, MOVTrack* track)

  444. {

  445.     int pos = url_ftell(pb), tag;

  446. 

  447.     put_be32(pb, 0); /* size */

  448. 

  449.     tag = codec_get_tag(codec_movvideo_tags, track->enc->codec_id);

  450.     // if no mac fcc found, try with Microsoft tags

  451.     if (!tag)

  452. 	tag = codec_get_tag(codec_bmp_tags, track->enc->codec_id);

  453.     if (!tag)

  454. 	put_tag(pb, "    ");

  455.     else

  456. 	put_le32(pb, tag); // store it byteswapped

  457. 

  458.     put_be32(pb, 0); /* Reserved */

  459.     put_be16(pb, 0); /* Reserved */

  460.     put_be16(pb, 1); /* Data-reference index */

  461. 

  462.     put_be32(pb, 0); /* Reserved (= 02000c) */

  463.     put_be32(pb, 0); /* Reserved ("SVis")*/

  464.     put_be32(pb, 0); /* Reserved */

  465.     put_be32(pb, 0); /* Reserved (400)*/

  466.     put_be16(pb, track->enc->width); /* Video width */

  467.     put_be16(pb, track->enc->height); /* Video height */

  468.     put_be32(pb, 0x00480000); /* Reserved */

  469.     put_be32(pb, 0x00480000); /* Reserved */

  470.     put_be32(pb, 0); /* Data size (= 0) */

  471.     put_be16(pb, 1); /* Frame count (= 1) */

  472.     

  473.     put_be32(pb, 0); /* Reserved */

  474.     put_be32(pb, 0); /* Reserved */

  475.     put_be32(pb, 0); /* Reserved */

  476.     put_be32(pb, 0); /* Reserved */

  477.     put_be32(pb, 0); /* Reserved */

  478.     put_be32(pb, 0); /* Reserved */

  479.     put_be32(pb, 0); /* Reserved */

  480.     put_be32(pb, 0); /* Reserved */

  481.     

  482.     put_be16(pb, 0x18); /* Reserved */

  483.     put_be16(pb, 0xffff); /* Reserved */

  484.     if(track->enc->codec_id == CODEC_ID_MPEG4)

  485.         mov_write_esds_tag(pb, track);

  486.     else if(track->enc->codec_id == CODEC_ID_H263)

  487.         mov_write_d263_tag(pb);

  488.     else if(track->enc->codec_id == CODEC_ID_SVQ3)

  489.         mov_write_svq3_tag(pb);    

  490. 

  491.     return updateSize (pb, pos);

  492. }

  493. 

  494. static int mov_write_stsd_tag(ByteIOContext *pb, MOVTrack* track)

  495. {

  496.     int pos = url_ftell(pb);

  497.     put_be32(pb, 0); /* size */

  498.     put_tag(pb, "stsd");

  499.     put_be32(pb, 0); /* version & flags */

  500.     put_be32(pb, 1); /* entry count */

  501.     if (track->enc->codec_type == CODEC_TYPE_VIDEO)

  502.         mov_write_video_tag(pb, track);

  503.     else if (track->enc->codec_type == CODEC_TYPE_AUDIO)

  504.         mov_write_audio_tag(pb, track);

  505.     return updateSize(pb, pos);

  506. }

  507. 

  508. /* TODO?: Currently all samples/frames seem to have same duration */

  509. /* Time to sample atom */

  510. static int mov_write_stts_tag(ByteIOContext *pb, MOVTrack* track)

  511. {

  512.     put_be32(pb, 0x18); /* size */

  513.     put_tag(pb, "stts");

  514.     put_be32(pb, 0); /* version & flags */

  515.     put_be32(pb, 1); /* entry count */

  516. 

  517.     put_be32(pb, track->sampleCount); /* sample count */

  518.     put_be32(pb, track->sampleDuration); /* sample duration */

  519.     return 0x18;

  520. }

  521. 

  522. static int mov_write_dref_tag(ByteIOContext *pb)

  523. {

  524.     put_be32(pb, 28); /* size */

  525.     put_tag(pb, "dref");

  526.     put_be32(pb, 0); /* version & flags */

  527.     put_be32(pb, 1); /* entry count */

  528. 

  529.     put_be32(pb, 0xc); /* size */

  530.     put_tag(pb, "url ");

  531.     put_be32(pb, 1); /* version & flags */

  532. 

  533.     return 28;

  534. }

  535. 

  536. static int mov_write_stbl_tag(ByteIOContext *pb, MOVTrack* track)

  537. {

  538.     int pos = url_ftell(pb);

  539.     put_be32(pb, 0); /* size */

  540.     put_tag(pb, "stbl");

  541.     mov_write_stsd_tag(pb, track);

  542.     mov_write_stts_tag(pb, track);

  543.     if (track->enc->codec_type == CODEC_TYPE_VIDEO &&

  544.         track->hasKeyframes)

  545.         mov_write_stss_tag(pb, track);

  546.     mov_write_stsc_tag(pb, track);

  547.     mov_write_stsz_tag(pb, track);

  548.     mov_write_stco_tag(pb, track);

  549.     return updateSize(pb, pos);

  550. }

  551. 

  552. static int mov_write_dinf_tag(ByteIOContext *pb)

  553. {

  554.     int pos = url_ftell(pb);

  555.     put_be32(pb, 0); /* size */

  556.     put_tag(pb, "dinf");

  557.     mov_write_dref_tag(pb);

  558.     return updateSize(pb, pos);

  559. }

  560. 

  561. static int mov_write_smhd_tag(ByteIOContext *pb)

  562. {

  563.     put_be32(pb, 16); /* size */

  564.     put_tag(pb, "smhd");

  565.     put_be32(pb, 0); /* version & flags */

  566.     put_be16(pb, 0); /* reserved (balance, normally = 0) */

  567.     put_be16(pb, 0); /* reserved */

  568.     return 16;

  569. }

  570. 

  571. static int mov_write_vmhd_tag(ByteIOContext *pb)

  572. {

  573.     put_be32(pb, 0x14); /* size (always 0x14) */

  574.     put_tag(pb, "vmhd");

  575.     put_be32(pb, 0x01); /* version & flags */

  576.     put_be64(pb, 0); /* reserved (graphics mode = copy) */

  577.     return 0x14;

  578. }

  579. 

  580. static int mov_write_hdlr_tag(ByteIOContext *pb, MOVTrack* track)

  581. {

  582.     char *descr, *hdlr, *hdlr_type;

  583.     int pos = url_ftell(pb);

  584.     

  585.     if (!track) { /* no media --> data handler */

  586. 	hdlr = "dhlr";

  587. 	hdlr_type = "url ";

  588. 	descr = "DataHandler";

  589.     } else {

  590. 	hdlr = (track->mode == MODE_MOV) ? "mhlr" : "\0\0\0\0";

  591. 	if (track->enc->codec_type == CODEC_TYPE_VIDEO) {

  592. 	    hdlr_type = "vide";

  593. 	    descr = "VideoHandler";

  594. 	} else {

  595. 	    hdlr_type = "soun";

  596. 	    descr = "SoundHandler";

  597. 	}

  598.     }

  599.     

  600.     put_be32(pb, 0); /* size */

  601.     put_tag(pb, "hdlr");

  602.     put_be32(pb, 0); /* Version & flags */

  603.     put_buffer(pb, hdlr, 4); /* handler */

  604.     put_tag(pb, hdlr_type); /* handler type */

  605.     put_be32(pb ,0); /* reserved */

  606.     put_be32(pb ,0); /* reserved */

  607.     put_be32(pb ,0); /* reserved */

  608.     put_byte(pb, strlen(descr)); /* string counter */

  609.     put_buffer(pb, descr, strlen(descr)); /* handler description */

  610.     return updateSize(pb, pos);

  611. }

  612. 

  613. static int mov_write_minf_tag(ByteIOContext *pb, MOVTrack* track)

  614. {

  615.     int pos = url_ftell(pb);

  616.     put_be32(pb, 0); /* size */

  617.     put_tag(pb, "minf");

  618.     if(track->enc->codec_type == CODEC_TYPE_VIDEO)

  619.         mov_write_vmhd_tag(pb);

  620.     else

  621.         mov_write_smhd_tag(pb);

  622.     if (track->mode == MODE_MOV) /* FIXME: Why do it for MODE_MOV only ? */

  623.         mov_write_hdlr_tag(pb, NULL);

  624.     mov_write_dinf_tag(pb);

  625.     mov_write_stbl_tag(pb, track);

  626.     return updateSize(pb, pos);

  627. }

  628. 

  629. static int mov_write_mdhd_tag(ByteIOContext *pb, MOVTrack* track)

  630. {

  631.     put_be32(pb, 32); /* size */

  632.     put_tag(pb, "mdhd");

  633.     put_be32(pb, 0); /* Version & flags */

  634.     put_be32(pb, track->time); /* creation time */

  635.     put_be32(pb, track->time); /* modification time */

  636.     put_be32(pb, track->timescale); /* time scale (sample rate for audio) */ 

  637.     put_be32(pb, track->trackDuration); /* duration */

  638.     put_be16(pb, 0); /* language, 0 = english */

  639.     put_be16(pb, 0); /* reserved (quality) */

  640.     return 32;

  641. }

  642. 

  643. static int mov_write_mdia_tag(ByteIOContext *pb, MOVTrack* track)

  644. {

  645.     int pos = url_ftell(pb);

  646.     put_be32(pb, 0); /* size */

  647.     put_tag(pb, "mdia");

  648.     mov_write_mdhd_tag(pb, track);

  649.     mov_write_hdlr_tag(pb, track);

  650.     mov_write_minf_tag(pb, track);

  651.     return updateSize(pb, pos);

  652. }

  653. 

  654. static int mov_write_tkhd_tag(ByteIOContext *pb, MOVTrack* track)

  655. {

  656.     int64_t maxTrackLenTemp;

  657.     put_be32(pb, 0x5c); /* size (always 0x5c) */

  658.     put_tag(pb, "tkhd");

  659.     put_be32(pb, 0xf); /* version & flags (track enabled) */

  660.     put_be32(pb, track->time); /* creation time */

  661.     put_be32(pb, track->time); /* modification time */

  662.     put_be32(pb, track->trackID); /* track-id */

  663.     put_be32(pb, 0); /* reserved */

  664.     maxTrackLenTemp = ((int64_t)globalTimescale*(int64_t)track->trackDuration)/(int64_t)track->timescale;

  665.     put_be32(pb, (long)maxTrackLenTemp); /* duration */

  666. 

  667.     put_be32(pb, 0); /* reserved */

  668.     put_be32(pb, 0); /* reserved */

  669.     put_be32(pb, 0x0); /* reserved (Layer & Alternate group) */

  670.     /* Volume, only for audio */

  671.     if(track->enc->codec_type == CODEC_TYPE_AUDIO)

  672.         put_be16(pb, 0x0100);

  673.     else

  674.         put_be16(pb, 0);

  675.     put_be16(pb, 0); /* reserved */

  676. 

  677.     /* Matrix structure */

  678.     put_be32(pb, 0x00010000); /* reserved */

  679.     put_be32(pb, 0x0); /* reserved */

  680.     put_be32(pb, 0x0); /* reserved */

  681.     put_be32(pb, 0x0); /* reserved */

  682.     put_be32(pb, 0x00010000); /* reserved */

  683.     put_be32(pb, 0x0); /* reserved */

  684.     put_be32(pb, 0x0); /* reserved */

  685.     put_be32(pb, 0x0); /* reserved */

  686.     put_be32(pb, 0x40000000); /* reserved */

  687. 

  688.     /* Track width and height, for visual only */

  689.     if(track->enc->codec_type == CODEC_TYPE_VIDEO) {

  690.         double sample_aspect_ratio = av_q2d(track->enc->sample_aspect_ratio);

  691.         if( !sample_aspect_ratio ) sample_aspect_ratio = 1;

  692.         put_be32(pb, sample_aspect_ratio * track->enc->width*0x10000);

  693.         put_be32(pb, track->enc->height*0x10000);

  694.     }

  695.     else {

  696.         put_be32(pb, 0);

  697.         put_be32(pb, 0);

  698.     }

  699.     return 0x5c;

  700. }

  701. 

  702. static int mov_write_trak_tag(ByteIOContext *pb, MOVTrack* track)

  703. {

  704.     int pos = url_ftell(pb);

  705.     put_be32(pb, 0); /* size */

  706.     put_tag(pb, "trak");

  707.     mov_write_tkhd_tag(pb, track);

  708.     mov_write_mdia_tag(pb, track);

  709.     return updateSize(pb, pos);

  710. }

  711. 

  712. /* TODO: Not sorted out, but not necessary either */

  713. static int mov_write_iods_tag(ByteIOContext *pb, MOVContext *mov)

  714. {

  715.     put_be32(pb, 0x15); /* size */

  716.     put_tag(pb, "iods");

  717.     put_be32(pb, 0);    /* version & flags */

  718.     put_be16(pb, 0x1007);

  719.     put_byte(pb, 0);

  720.     put_be16(pb, 0x4fff);

  721.     put_be16(pb, 0xfffe);

  722.     put_be16(pb, 0x01ff);

  723.     return 0x15;

  724. }

  725. 

  726. static int mov_write_mvhd_tag(ByteIOContext *pb, MOVContext *mov)

  727. {

  728.     int maxTrackID = 1, maxTrackLen = 0, i;

  729.     int64_t maxTrackLenTemp;

  730. 

  731.     put_be32(pb, 0x6c); /* size (always 0x6c) */

  732.     put_tag(pb, "mvhd");

  733.     put_be32(pb, 0); /* version & flags */

  734.     put_be32(pb, mov->time); /* creation time */

  735.     put_be32(pb, mov->time); /* modification time */

  736.     put_be32(pb, mov->timescale); /* timescale */

  737.     for (i=0; i<MAX_STREAMS; i++) {

  738.         if(mov->tracks[i].entry > 0) {

  739.             maxTrackLenTemp = ((int64_t)globalTimescale*(int64_t)mov->tracks[i].trackDuration)/(int64_t)mov->tracks[i].timescale;

  740.             if(maxTrackLen < maxTrackLenTemp)

  741.                 maxTrackLen = maxTrackLenTemp;

  742.             if(maxTrackID < mov->tracks[i].trackID)

  743.                 maxTrackID = mov->tracks[i].trackID;

  744.         }

  745.     }

  746.     put_be32(pb, maxTrackLen); /* duration of longest track */

  747. 

  748.     put_be32(pb, 0x00010000); /* reserved (preferred rate) 1.0 = normal */

  749.     put_be16(pb, 0x0100); /* reserved (preferred volume) 1.0 = normal */

  750.     put_be16(pb, 0); /* reserved */

  751.     put_be32(pb, 0); /* reserved */

  752.     put_be32(pb, 0); /* reserved */

  753. 

  754.     /* Matrix structure */

  755.     put_be32(pb, 0x00010000); /* reserved */

  756.     put_be32(pb, 0x0); /* reserved */

  757.     put_be32(pb, 0x0); /* reserved */

  758.     put_be32(pb, 0x0); /* reserved */

  759.     put_be32(pb, 0x00010000); /* reserved */

  760.     put_be32(pb, 0x0); /* reserved */

  761.     put_be32(pb, 0x0); /* reserved */

  762.     put_be32(pb, 0x0); /* reserved */

  763.     put_be32(pb, 0x40000000); /* reserved */

  764. 

  765.     put_be32(pb, 0); /* reserved (preview time) */

  766.     put_be32(pb, 0); /* reserved (preview duration) */

  767.     put_be32(pb, 0); /* reserved (poster time) */

  768.     put_be32(pb, 0); /* reserved (selection time) */

  769.     put_be32(pb, 0); /* reserved (selection duration) */

  770.     put_be32(pb, 0); /* reserved (current time) */

  771.     put_be32(pb, maxTrackID+1); /* Next track id */

  772.     return 0x6c;

  773. }

  774. 

  775. static int mov_write_udta_tag(ByteIOContext *pb, MOVContext* mov,

  776.                               AVFormatContext *s)

  777. {

  778.     int pos = url_ftell(pb);

  779.     int i;

  780. 

  781.     put_be32(pb, 0); /* size */

  782.     put_tag(pb, "udta");

  783. 

  784.     /* Requirements */

  785.     for (i=0; i<MAX_STREAMS; i++) {

  786.         if(mov->tracks[i].entry <= 0) continue;

  787.         if (mov->tracks[i].enc->codec_id == CODEC_ID_AAC ||

  788.             mov->tracks[i].enc->codec_id == CODEC_ID_MPEG4) {

  789.             int pos = url_ftell(pb);

  790.             put_be32(pb, 0); /* size */

  791.             put_tag(pb, "\251req");

  792.             put_be16(pb, sizeof("QuickTime 6.0 or greater") - 1);

  793.             put_be16(pb, 0);

  794.             put_buffer(pb, "QuickTime 6.0 or greater",

  795.                        sizeof("QuickTime 6.0 or greater") - 1);

  796.             updateSize(pb, pos);

  797.             break;

  798.         }

  799.     }

  800. 

  801.     /* Encoder */

  802.     if(!(mov->tracks[0].enc->flags & CODEC_FLAG_BITEXACT))

  803.     {

  804.         int pos = url_ftell(pb);

  805.         put_be32(pb, 0); /* size */

  806.         put_tag(pb, "\251enc");

  807.         put_be16(pb, sizeof(LIBAVFORMAT_IDENT) - 1); /* string length */

  808.         put_be16(pb, 0);

  809.         put_buffer(pb, LIBAVFORMAT_IDENT, sizeof(LIBAVFORMAT_IDENT) - 1);

  810.         updateSize(pb, pos);

  811.     }

  812. 

  813.     if( s->title[0] )

  814.     {

  815.         int pos = url_ftell(pb);

  816.         put_be32(pb, 0); /* size */

  817.         put_tag(pb, "\251nam");

  818.         put_be16(pb, strlen(s->title)); /* string length */

  819.         put_be16(pb, 0);

  820.         put_buffer(pb, s->title, strlen(s->title));

  821.         updateSize(pb, pos);

  822.     }

  823. 

  824.     if( s->author[0] )

  825.     {

  826.         int pos = url_ftell(pb);

  827.         put_be32(pb, 0); /* size */

  828.         put_tag(pb, /*"\251aut"*/ "\251day" );

  829.         put_be16(pb, strlen(s->author)); /* string length */

  830.         put_be16(pb, 0);

  831.         put_buffer(pb, s->author, strlen(s->author));

  832.         updateSize(pb, pos);

  833.     }

  834. 

  835.     if( s->comment[0] )

  836.     {

  837.         int pos = url_ftell(pb);

  838.         put_be32(pb, 0); /* size */

  839.         put_tag(pb, "\251des");

  840.         put_be16(pb, strlen(s->comment)); /* string length */

  841.         put_be16(pb, 0);

  842.         put_buffer(pb, s->comment, strlen(s->comment));

  843.         updateSize(pb, pos);

  844.     }

  845. 

  846.     return updateSize(pb, pos);

  847. }

  848. 

  849. static int mov_write_moov_tag(ByteIOContext *pb, MOVContext *mov,

  850.                               AVFormatContext *s)

  851. {

  852.     int pos, i;

  853.     pos = url_ftell(pb);

  854.     put_be32(pb, 0); /* size placeholder*/

  855.     put_tag(pb, "moov");

  856.     mov->timescale = globalTimescale;

  857. 

  858.     for (i=0; i<MAX_STREAMS; i++) {

  859.         if(mov->tracks[i].entry <= 0) continue;

  860. 

  861.         if(mov->tracks[i].enc->codec_type == CODEC_TYPE_VIDEO) {

  862.             mov->tracks[i].timescale = mov->tracks[i].enc->frame_rate;

  863.             mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_rate_base;

  864.         }

  865.         else if(mov->tracks[i].enc->codec_type == CODEC_TYPE_AUDIO) {

  866.             /* If AMR, track timescale = 8000, AMR_WB = 16000 */

  867.             if(mov->tracks[i].enc->codec_id == CODEC_ID_AMR_NB) {

  868.                 mov->tracks[i].sampleDuration = 160;  // Bytes per chunk

  869.                 mov->tracks[i].timescale = 8000;

  870.             }

  871.             else {

  872.                 mov->tracks[i].timescale = mov->tracks[i].enc->sample_rate;

  873.                 mov->tracks[i].sampleDuration = mov->tracks[i].enc->frame_size;

  874.             }

  875.         }

  876. 

  877.         mov->tracks[i].trackDuration = 

  878.             mov->tracks[i].sampleCount * mov->tracks[i].sampleDuration;

  879.         mov->tracks[i].time = mov->time;

  880.         mov->tracks[i].trackID = i+1;

  881.     }

  882. 

  883.     mov_write_mvhd_tag(pb, mov);

  884.     //mov_write_iods_tag(pb, mov);

  885.     for (i=0; i<MAX_STREAMS; i++) {

  886.         if(mov->tracks[i].entry > 0) {

  887.             mov_write_trak_tag(pb, &(mov->tracks[i]));

  888.         }

  889.     }

  890. 

  891.     mov_write_udta_tag(pb, mov, s);

  892. 

  893.     return updateSize(pb, pos);

  894. }

  895. 

  896. int mov_write_mdat_tag(ByteIOContext *pb, MOVContext* mov)

  897. {

  898.     mov->mdat_pos = url_ftell(pb); 

  899.     put_be32(pb, 0); /* size placeholder*/

  900.     put_tag(pb, "mdat");

  901.     return 0;

  902. }

  903. 

  904. /* TODO: This needs to be more general */

  905. int mov_write_ftyp_tag(ByteIOContext *pb, AVFormatContext *s)

  906. {

  907.     MOVContext *mov = s->priv_data;

  908. 

  909.     put_be32(pb, 0x14 ); /* size */

  910.     put_tag(pb, "ftyp");

  911. 

  912.     if ( mov->mode == MODE_3GP )

  913.         put_tag(pb, "3gp4");

  914.     else

  915.         put_tag(pb, "isom");

  916. 

  917.     put_be32(pb, 0x200 );

  918. 

  919.     if ( mov->mode == MODE_3GP )

  920.         put_tag(pb, "3gp4");

  921.     else

  922.         put_tag(pb, "mp41");

  923. 

  924.     return 0x14;

  925. }

  926. 

  927. static int mov_write_header(AVFormatContext *s)

  928. {

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

  930.     MOVContext *mov = s->priv_data;

  931.     int i;

  932. 

  933.     /* Default mode == MP4 */

  934.     mov->mode = MODE_MP4;

  935. 

  936.     if (s->oformat != NULL) {

  937.         if (!strcmp("3gp", s->oformat->name)) mov->mode = MODE_3GP;

  938.         else if (!strcmp("mov", s->oformat->name)) mov->mode = MODE_MOV;

  939. 

  940.         if ( mov->mode == MODE_3GP || mov->mode == MODE_MP4 )

  941.             mov_write_ftyp_tag(pb,s);

  942.     }

  943. 

  944.     for (i=0; i<MAX_STREAMS; i++) {

  945.         mov->tracks[i].mode = mov->mode;

  946.     }

  947. 

  948.     put_flush_packet(pb);

  949. 

  950.     return 0;

  951. }

  952. 

  953. static int mov_write_packet(AVFormatContext *s, int stream_index,

  954.                             const uint8_t *buf, int size, int64_t pts)

  955. {

  956.     MOVContext *mov = s->priv_data;

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

  958.     AVCodecContext *enc = &s->streams[stream_index]->codec;

  959.     MOVTrack* trk = &mov->tracks[stream_index];

  960.     int cl, id;

  961.     unsigned int samplesInChunk = 0;

  962. 

  963.     if (url_is_streamed(&s->pb)) return 0; /* Can't handle that */

  964.     if (!size) return 0; /* Discard 0 sized packets */

  965. 

  966.     if (enc->codec_type == CODEC_TYPE_VIDEO ) {

  967.         samplesInChunk = 1;

  968.     }

  969.     else if (enc->codec_type == CODEC_TYPE_AUDIO ) {

  970.         if( enc->codec_id == CODEC_ID_AMR_NB) {

  971.             /* We must find out how many AMR blocks there are in one packet */

  972.             static uint16_t packed_size[16] =

  973.                 {13, 14, 16, 18, 20, 21, 27, 32, 6, 0, 0, 0, 0, 0, 0, 0};

  974.             int len = 0;

  975. 

  976.             while (len < size && samplesInChunk < 100) {

  977.                 len += packed_size[(buf[len] >> 3) & 0x0F];

  978.                 samplesInChunk++;

  979.             }

  980.         }

  981.         else if(enc->codec_id == CODEC_ID_PCM_ALAW) {

  982.             samplesInChunk = size/enc->channels;

  983.         }

  984. 	else if(enc->codec_id == CODEC_ID_PCM_S16BE || enc->codec_id == CODEC_ID_PCM_S16LE) {

  985. 	    samplesInChunk = size/(2*enc->channels);

  986.         }	    

  987.         else {

  988.             samplesInChunk = 1;

  989.         }

  990.     }

  991. 

  992.     if ((enc->codec_id == CODEC_ID_MPEG4 || enc->codec_id == CODEC_ID_AAC)

  993.         && trk->vosLen == 0) {

  994. //        assert(enc->extradata_size);

  995. 

  996.         trk->vosLen = enc->extradata_size;

  997.         trk->vosData = av_malloc(trk->vosLen);

  998.         memcpy(trk->vosData, enc->extradata, trk->vosLen);

  999.     }

  1000. 

  1001.     cl = trk->entry / MOV_INDEX_CLUSTER_SIZE;

  1002.     id = trk->entry % MOV_INDEX_CLUSTER_SIZE;

  1003. 

  1004.     if (trk->ents_allocated <= trk->entry) {

  1005.         trk->cluster = av_realloc(trk->cluster, (cl+1)*sizeof(void*)); 

  1006.         if (!trk->cluster)

  1007.             return -1;

  1008.         trk->cluster[cl] = av_malloc(MOV_INDEX_CLUSTER_SIZE*sizeof(MOVIentry));

  1009.         if (!trk->cluster[cl])

  1010.             return -1;

  1011.         trk->ents_allocated += MOV_INDEX_CLUSTER_SIZE;

  1012.     }

  1013.     if (mov->mdat_written == 0) {

  1014.         mov_write_mdat_tag(pb, mov);

  1015.         mov->mdat_written = 1;

  1016.         mov->time = s->timestamp;

  1017.     }

  1018. 

  1019.     trk->cluster[cl][id].pos = url_ftell(pb);

  1020.     trk->cluster[cl][id].samplesInChunk = samplesInChunk;

  1021.     trk->cluster[cl][id].size = size;

  1022.     trk->cluster[cl][id].entries = samplesInChunk;

  1023.     if(enc->codec_type == CODEC_TYPE_VIDEO) {

  1024.         trk->cluster[cl][id].key_frame = enc->coded_frame->key_frame;

  1025.         if(enc->coded_frame->pict_type == FF_I_TYPE)

  1026.             trk->hasKeyframes = 1;

  1027.     }

  1028.     trk->enc = enc;

  1029.     trk->entry++;

  1030.     trk->sampleCount += samplesInChunk;

  1031.     trk->mdat_size += size;

  1032. 

  1033.     put_buffer(pb, buf, size);

  1034. 

  1035.     put_flush_packet(pb);

  1036.     return 0;

  1037. }

  1038. 

  1039. static int mov_write_trailer(AVFormatContext *s)

  1040. {

  1041.     MOVContext *mov = s->priv_data;

  1042.     ByteIOContext *pb = &s->pb;

  1043.     int res = 0;

  1044.     int i, j;

  1045. 

  1046.     offset_t moov_pos = url_ftell(pb);

  1047. 

  1048.     /* Write size of mdat tag */

  1049.     for (i=0, j=0; i<MAX_STREAMS; i++) {

  1050.         if(mov->tracks[i].ents_allocated > 0) {

  1051.             j += mov->tracks[i].mdat_size;

  1052.         }

  1053.     }

  1054.     url_fseek(pb, mov->mdat_pos, SEEK_SET);

  1055.     put_be32(pb, j+8);

  1056.     url_fseek(pb, moov_pos, SEEK_SET);

  1057. 

  1058.     mov_write_moov_tag(pb, mov, s);

  1059. 

  1060.     for (i=0; i<MAX_STREAMS; i++) {

  1061.         for (j=0; j<mov->tracks[i].ents_allocated/MOV_INDEX_CLUSTER_SIZE; j++) {

  1062.             av_free(mov->tracks[i].cluster[j]);

  1063.         }

  1064.         av_free(mov->tracks[i].cluster);

  1065.         if( mov->tracks[i].vosLen ) av_free( mov->tracks[i].vosData );

  1066. 

  1067.         mov->tracks[i].cluster = NULL;

  1068.         mov->tracks[i].ents_allocated = mov->tracks[i].entry = 0;

  1069.     }

  1070. 

  1071.     put_flush_packet(pb);

  1072. 

  1073.     return res;

  1074. }

  1075. 

  1076. static AVOutputFormat mov_oformat = {

  1077.     "mov",

  1078.     "mov format",

  1079.     NULL,

  1080.     "mov",

  1081.     sizeof(MOVContext),

  1082.     CODEC_ID_AAC,

  1083.     CODEC_ID_MPEG4,

  1084.     mov_write_header,

  1085.     mov_write_packet,

  1086.     mov_write_trailer,

  1087. };

  1088. 

  1089. static AVOutputFormat _3gp_oformat = {

  1090.     "3gp",

  1091.     "3gp format",

  1092.     NULL,

  1093.     "3gp",

  1094.     sizeof(MOVContext),

  1095.     CODEC_ID_AMR_NB,

  1096.     CODEC_ID_H263,

  1097.     mov_write_header,

  1098.     mov_write_packet,

  1099.     mov_write_trailer,

  1100. };

  1101. 

  1102. static AVOutputFormat mp4_oformat = {

  1103.     "mp4",

  1104.     "mp4 format",

  1105.     "application/mp4",

  1106.     "mp4,m4a",

  1107.     sizeof(MOVContext),

  1108.     CODEC_ID_AAC,

  1109.     CODEC_ID_MPEG4,

  1110.     mov_write_header,

  1111.     mov_write_packet,

  1112.     mov_write_trailer,

  1113. };

  1114. 

  1115. int movenc_init(void)

  1116. {

  1117.     av_register_output_format(&mov_oformat);

  1118.     av_register_output_format(&_3gp_oformat);

  1119.     av_register_output_format(&mp4_oformat);

  1120.     return 0;

  1121. }