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FFmpeg/libavformat/avienc.c

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  1. /*

  2.  * AVI encoder.

  3.  * Copyright (c) 2000 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. #include "avformat.h"

  20. #include "avi.h"

  21. 

  22. /*

  23.  * TODO: 

  24.  *  - fill all fields if non streamed (nb_frames for example)

  25.  */

  26. 

  27. typedef struct AVIIentry {

  28.     unsigned int flags, pos, len;

  29. } AVIIentry;

  30. 

  31. #define AVI_INDEX_CLUSTER_SIZE 16384

  32. 

  33. typedef struct AVIIndex {

  34.     offset_t    indx_start;

  35.     int         entry;

  36.     int         ents_allocated;

  37.     AVIIentry** cluster;

  38. } AVIIndex;

  39. 

  40. typedef struct {

  41.     offset_t riff_start, movi_list, odml_list;

  42.     offset_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS];

  43.     int audio_strm_length[MAX_STREAMS];

  44.     int riff_id;

  45. 

  46.     AVIIndex indexes[MAX_STREAMS];

  47. } AVIContext;

  48. 

  49. static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id) 

  50. {

  51.     int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;

  52.     int id = ent_id % AVI_INDEX_CLUSTER_SIZE;

  53.     return &idx->cluster[cl][id];

  54. }

  55. 

  56. offset_t start_tag(ByteIOContext *pb, const char *tag)

  57. {

  58.     put_tag(pb, tag);

  59.     put_le32(pb, 0);

  60.     return url_ftell(pb);

  61. }

  62. 

  63. void end_tag(ByteIOContext *pb, offset_t start)

  64. {

  65.     offset_t pos;

  66. 

  67.     pos = url_ftell(pb);

  68.     url_fseek(pb, start - 4, SEEK_SET);

  69.     put_le32(pb, (uint32_t)(pos - start));

  70.     url_fseek(pb, pos, SEEK_SET);

  71. }

  72. 

  73. /* Note: when encoding, the first matching tag is used, so order is

  74.    important if multiple tags possible for a given codec. */

  75. const CodecTag codec_bmp_tags[] = {

  76.     { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },

  77.     { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },

  78.     { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */

  79. 

  80.     /* added based on MPlayer */

  81.     { CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },

  82.     { CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },

  83. 

  84.     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },

  85.     { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },

  86.     { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },

  87.     { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },

  88.     { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },

  89.     { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */

  90. 

  91.     /* added based on MPlayer */

  92.     { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },

  93.     { CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },

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

  95.     { CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },

  96. 

  97.     { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */

  98.     { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, 

  99. 

  100.     /* added based on MPlayer */

  101.     { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') }, 

  102.     { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') }, 

  103.     { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') }, 

  104.     { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') }, 

  105.     { CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') }, 

  106.     { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') }, 

  107.     { CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') }, 

  108. 

  109.     { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') }, 

  110. 

  111.     /* added based on MPlayer */

  112.     { CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },

  113.  

  114.     { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') }, 

  115. 

  116.     /* added based on MPlayer */

  117.     { CODEC_ID_MSMPEG4V1, MKTAG('D', 'I', 'V', '4') }, 

  118. 

  119.     { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') }, 

  120. 

  121.     /* added based on MPlayer */

  122.     { CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') }, 

  123.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') }, 

  124.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') }, 

  125.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') }, 

  126.     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },

  127.     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') }, 

  128.     { CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') }, 

  129.     { CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') }, 

  130.     { CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') }, 

  131.     { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },

  132.     { CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },

  133.     { CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },

  134.     { CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */

  135.     { CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },

  136.     { CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },

  137.     { CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },

  138.     { CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },

  139.     { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },

  140.     { CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },

  141.     { CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },

  142.     { CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },

  143.     { CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },

  144.     { CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },

  145.     { CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },

  146.     { 0, 0 },

  147. };

  148. 

  149. unsigned int codec_get_tag(const CodecTag *tags, int id)

  150. {

  151.     while (tags->id != 0) {

  152.         if (tags->id == id)

  153.             return tags->tag;

  154.         tags++;

  155.     }

  156.     return 0;

  157. }

  158. 

  159. static unsigned int codec_get_asf_tag(const CodecTag *tags, int id)

  160. {

  161.     while (tags->id != 0) {

  162.         if (!tags->invalid_asf && tags->id == id)

  163.             return tags->tag;

  164.         tags++;

  165.     }

  166.     return 0;

  167. }

  168. 

  169. enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)

  170. {

  171.     while (tags->id != 0) {

  172.         if(   toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)

  173.            && toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)

  174.            && toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)

  175.            && toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))

  176.             return tags->id;

  177.         tags++;

  178.     }

  179.     return CODEC_ID_NONE;

  180. }

  181. 

  182. unsigned int codec_get_bmp_tag(int id)

  183. {

  184.     return codec_get_tag(codec_bmp_tags, id);

  185. }

  186. 

  187. /* BITMAPINFOHEADER header */

  188. void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)

  189. {

  190.     put_le32(pb, 40 + enc->extradata_size); /* size */

  191.     put_le32(pb, enc->width);

  192.     put_le32(pb, enc->height);

  193.     put_le16(pb, 1); /* planes */

  194.     

  195.     put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */

  196.     /* compression type */

  197.     put_le32(pb, for_asf ? codec_get_asf_tag(tags, enc->codec_id) : enc->codec_tag);

  198.     put_le32(pb, enc->width * enc->height * 3);

  199.     put_le32(pb, 0);

  200.     put_le32(pb, 0);

  201.     put_le32(pb, 0);

  202.     put_le32(pb, 0);

  203.     

  204.     put_buffer(pb, enc->extradata, enc->extradata_size);

  205. 

  206.     if (enc->extradata_size & 1)

  207.         put_byte(pb, 0);

  208. }

  209. 

  210. static void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)

  211. {

  212.     switch(stream->codec_id) {

  213.     case CODEC_ID_PCM_S16LE:

  214.        *au_scale = *au_ssize = 2*stream->channels;

  215.        *au_byterate = *au_ssize * stream->sample_rate;

  216.         break;

  217.     case CODEC_ID_PCM_U8:

  218.     case CODEC_ID_PCM_ALAW:

  219.     case CODEC_ID_PCM_MULAW:

  220.         *au_scale = *au_ssize = stream->channels;

  221.         *au_byterate = *au_ssize * stream->sample_rate;

  222.         break;

  223.     case CODEC_ID_MP2:

  224.         *au_ssize = 1;

  225.         *au_scale = 1;

  226.         *au_byterate = stream->bit_rate / 8;

  227.     case CODEC_ID_MP3LAME:

  228.         *au_ssize = 1;

  229.         *au_scale = 1;

  230.         *au_byterate = stream->bit_rate / 8;    

  231.     default:

  232.         *au_ssize = 1;

  233.         *au_scale = 1; 

  234.         *au_byterate = stream->bit_rate / 8;

  235.         break;

  236.     }

  237. }

  238. 

  239. static offset_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb, 

  240.                                    const char* riff_tag, const char* list_tag)

  241. {

  242.     offset_t loff;

  243.     int i;

  244.     

  245.     avi->riff_id++;

  246.     for (i=0; i<MAX_STREAMS; i++)

  247.          avi->indexes[i].entry = 0;

  248.     

  249.     avi->riff_start = start_tag(pb, "RIFF");

  250.     put_tag(pb, riff_tag);

  251.     loff = start_tag(pb, "LIST");

  252.     put_tag(pb, list_tag);

  253.     return loff;

  254. }

  255. 

  256. static unsigned char* avi_stream2fourcc(unsigned char* tag, int index, 

  257.                                         enum CodecType type)

  258. {

  259.     tag[0] = '0';

  260.     tag[1] = '0' + index;

  261.     if (type == CODEC_TYPE_VIDEO) {

  262.         tag[2] = 'd';

  263.         tag[3] = 'c';

  264.     } else {

  265.         tag[2] = 'w';

  266.         tag[3] = 'b';

  267.     }

  268.     tag[4] = '\0';

  269.     return tag;

  270. }

  271. 

  272. static int avi_write_header(AVFormatContext *s)

  273. {

  274.     AVIContext *avi = s->priv_data;

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

  276.     int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;

  277.     AVCodecContext *stream, *video_enc;

  278.     offset_t list1, list2, strh, strf;

  279. 

  280.     /* header list */

  281.     avi->riff_id = 0;

  282.     list1 = avi_start_new_riff(avi, pb, "AVI ", "hdrl");

  283. 

  284.     /* avi header */

  285.     put_tag(pb, "avih");

  286.     put_le32(pb, 14 * 4);

  287.     bitrate = 0;

  288. 

  289.     video_enc = NULL;

  290.     for(n=0;n<s->nb_streams;n++) {

  291.         stream = &s->streams[n]->codec;

  292.         bitrate += stream->bit_rate;

  293.         if (stream->codec_type == CODEC_TYPE_VIDEO)

  294.             video_enc = stream;

  295.     }

  296.     

  297.     nb_frames = 0;

  298. 

  299.     if(video_enc){

  300.         put_le32(pb, (uint32_t)(int64_t_C(1000000) * video_enc->frame_rate_base / video_enc->frame_rate));

  301.     } else {

  302. 	put_le32(pb, 0);

  303.     }

  304.     put_le32(pb, bitrate / 8); /* XXX: not quite exact */

  305.     put_le32(pb, 0); /* padding */

  306.     put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */

  307.     avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */

  308.     put_le32(pb, nb_frames); /* nb frames, filled later */

  309.     put_le32(pb, 0); /* initial frame */

  310.     put_le32(pb, s->nb_streams); /* nb streams */

  311.     put_le32(pb, 1024 * 1024); /* suggested buffer size */

  312.     if(video_enc){    

  313.     put_le32(pb, video_enc->width);

  314.     put_le32(pb, video_enc->height);

  315.     } else {

  316. 	put_le32(pb, 0);

  317. 	put_le32(pb, 0);

  318.     }	

  319.     put_le32(pb, 0); /* reserved */

  320.     put_le32(pb, 0); /* reserved */

  321.     put_le32(pb, 0); /* reserved */

  322.     put_le32(pb, 0); /* reserved */

  323.     

  324.     /* stream list */

  325.     for(i=0;i<n;i++) {

  326.         list2 = start_tag(pb, "LIST");

  327.         put_tag(pb, "strl");

  328.     

  329.         stream = &s->streams[i]->codec;

  330. 

  331.         /* FourCC should really be set by the codec itself */

  332.         if (! stream->codec_tag) {

  333.             stream->codec_tag = codec_get_bmp_tag(stream->codec_id);

  334.         }

  335. 

  336.         /* stream generic header */

  337.         strh = start_tag(pb, "strh");

  338.         switch(stream->codec_type) {

  339.         case CODEC_TYPE_VIDEO:

  340.             put_tag(pb, "vids");

  341.             put_le32(pb, stream->codec_tag);

  342.             put_le32(pb, 0); /* flags */

  343.             put_le16(pb, 0); /* priority */

  344.             put_le16(pb, 0); /* language */

  345.             put_le32(pb, 0); /* initial frame */

  346.             

  347.             put_le32(pb, stream->frame_rate_base); /* scale */

  348.             put_le32(pb, stream->frame_rate); /* rate */

  349. 

  350.             put_le32(pb, 0); /* start */

  351.             avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */

  352.             put_le32(pb, nb_frames); /* length, XXX: fill later */

  353.             put_le32(pb, 1024 * 1024); /* suggested buffer size */

  354.             put_le32(pb, -1); /* quality */

  355.             put_le32(pb, stream->width * stream->height * 3); /* sample size */

  356.             put_le16(pb, 0);

  357.             put_le16(pb, 0);

  358.             put_le16(pb, stream->width);

  359.             put_le16(pb, stream->height);

  360.             break;

  361.         case CODEC_TYPE_AUDIO:

  362.             put_tag(pb, "auds");

  363.             put_le32(pb, 1); /* tag */

  364.             put_le32(pb, 0); /* flags */

  365.             put_le16(pb, 0); /* priority */

  366.             put_le16(pb, 0); /* language */

  367.             put_le32(pb, 0); /* initial frame */

  368.             parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);

  369.             put_le32(pb, au_scale); /* scale */

  370.             put_le32(pb, au_byterate); /* rate */

  371.             put_le32(pb, 0); /* start */

  372.             avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */

  373.             put_le32(pb, 0); /* length, XXX: filled later */

  374.             put_le32(pb, 12 * 1024); /* suggested buffer size */

  375.             put_le32(pb, -1); /* quality */

  376.             put_le32(pb, au_ssize); /* sample size */

  377.             put_le32(pb, 0);

  378.             put_le32(pb, 0);

  379.             break;

  380.         default:

  381.             av_abort();

  382.         }

  383.         end_tag(pb, strh);

  384. 

  385.         strf = start_tag(pb, "strf");

  386.         switch(stream->codec_type) {

  387.         case CODEC_TYPE_VIDEO:

  388. 	    put_bmp_header(pb, stream, codec_bmp_tags, 0);

  389.             break;

  390.         case CODEC_TYPE_AUDIO:

  391.             if (put_wav_header(pb, stream) < 0) {

  392.                 av_free(avi);

  393.                 return -1;

  394.             }

  395.             break;

  396.         default:

  397.             av_abort();

  398.         }

  399.         end_tag(pb, strf);

  400. 	

  401. 	if (!url_is_streamed(pb)) {

  402. 	    unsigned char tag[5];

  403. 	    int j;

  404.     

  405.             /* Starting to lay out AVI OpenDML master index. 

  406. 	     * We want to make it JUNK entry for now, since we'd

  407. 	     * like to get away without making AVI an OpenDML one 

  408. 	     * for compatibility reasons.

  409. 	     */

  410. 	    avi->indexes[i].entry = avi->indexes[i].ents_allocated = 0;

  411. 	    avi->indexes[i].indx_start = start_tag(pb, "JUNK"); 

  412. 	    put_le16(pb, 4);        /* wLongsPerEntry */

  413. 	    put_byte(pb, 0);        /* bIndexSubType (0 == frame index) */

  414. 	    put_byte(pb, 0);        /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */

  415. 	    put_le32(pb, 0);        /* nEntriesInUse (will fill out later on) */

  416. 	    put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));

  417. 	                            /* dwChunkId */

  418. 	    put_le64(pb, 0);        /* dwReserved[3]

  419. 	    put_le32(pb, 0);           Must be 0.    */

  420. 	    for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)

  421. 	         put_le64(pb, 0);

  422. 	    end_tag(pb, avi->indexes[i].indx_start);

  423. 	}

  424. 	

  425.         end_tag(pb, list2);

  426.     }

  427.     

  428.     if (!url_is_streamed(pb)) {

  429.         /* AVI could become an OpenDML one, if it grows beyond 2Gb range */

  430.         avi->odml_list = start_tag(pb, "JUNK");

  431.         put_tag(pb, "odml");

  432.         put_tag(pb, "dmlh");

  433.         put_le32(pb, 248);

  434.         for (i = 0; i < 248; i+= 4)

  435.              put_le32(pb, 0);

  436.         end_tag(pb, avi->odml_list);

  437.     }

  438. 

  439.     end_tag(pb, list1);

  440.     

  441.     avi->movi_list = start_tag(pb, "LIST");

  442.     put_tag(pb, "movi");

  443. 

  444.     put_flush_packet(pb);

  445. 

  446.     return 0;

  447. }

  448. 

  449. static int avi_write_ix(AVFormatContext *s)

  450. {

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

  452.     AVIContext *avi = s->priv_data;

  453.     unsigned char tag[5];

  454.     unsigned char ix_tag[] = "ix00";

  455.     int i, j;

  456.     

  457.     if (avi->riff_id > AVI_MASTER_INDEX_SIZE)

  458.         return -1;

  459.     

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

  461. 	 offset_t ix, pos;

  462. 	 

  463. 	 avi_stream2fourcc(&tag[0], i, s->streams[i]->codec.codec_type);

  464. 	 ix_tag[3] = '0' + i;

  465. 	 

  466. 	 /* Writing AVI OpenDML leaf index chunk */

  467. 	 ix = url_ftell(pb); 

  468. 	 put_tag(pb, &ix_tag[0]);     /* ix?? */

  469. 	 put_le32(pb, avi->indexes[i].entry * 8 + 24); 

  470. 	                              /* chunk size */

  471.          put_le16(pb, 2);             /* wLongsPerEntry */

  472. 	 put_byte(pb, 0);             /* bIndexSubType (0 == frame index) */ 

  473. 	 put_byte(pb, 1);             /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */

  474. 	 put_le32(pb, avi->indexes[i].entry);          

  475. 	                              /* nEntriesInUse */

  476. 	 put_tag(pb, &tag[0]);        /* dwChunkId */

  477. 	 put_le64(pb, avi->movi_list);/* qwBaseOffset */

  478. 	 put_le32(pb, 0);             /* dwReserved_3 (must be 0) */

  479. 

  480.          for (j=0; j<avi->indexes[i].entry; j++) {

  481.              AVIIentry* ie = avi_get_ientry(&avi->indexes[i], j);

  482. 	     put_le32(pb, ie->pos + 8);

  483. 	     put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |

  484. 	                  (ie->flags & 0x10 ? 0 : 0x80000000));

  485.          }

  486. 	 put_flush_packet(pb);

  487.          pos = url_ftell(pb);

  488. 	

  489. 	 /* Updating one entry in the AVI OpenDML master index */

  490. 	 url_fseek(pb, avi->indexes[i].indx_start - 8, SEEK_SET);

  491. 	 put_tag(pb, "indx");                 /* enabling this entry */

  492. 	 url_fskip(pb, 8);

  493. 	 put_le32(pb, avi->riff_id);          /* nEntriesInUse */

  494. 	 url_fskip(pb, 16*avi->riff_id);

  495. 	 put_le64(pb, ix);                    /* qwOffset */

  496. 	 put_le32(pb, pos - ix);              /* dwSize */

  497. 	 put_le32(pb, avi->indexes[i].entry); /* dwDuration */

  498. 

  499. 	 url_fseek(pb, pos, SEEK_SET);

  500.     }

  501.     return 0;

  502. }

  503. 

  504. static int avi_write_idx1(AVFormatContext *s)

  505. {

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

  507.     AVIContext *avi = s->priv_data;

  508.     offset_t file_size, idx_chunk;

  509.     int i, n, nb_frames, au_byterate, au_ssize, au_scale;

  510.     AVCodecContext *stream;

  511.     unsigned char tag[5];

  512. 

  513.     if (!url_is_streamed(pb)) {

  514. 	AVIIentry* ie = 0, *tie;

  515. 	int entry[MAX_STREAMS];

  516. 	int empty, stream_id = -1;

  517. 

  518. 	idx_chunk = start_tag(pb, "idx1");

  519. 	memset(&entry[0], 0, sizeof(entry));

  520. 	do {

  521. 	    empty = 1;

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

  523. 	         if (avi->indexes[i].entry <= entry[i])

  524. 		     continue;

  525. 		 

  526. 		 tie = avi_get_ientry(&avi->indexes[i], entry[i]);

  527. 		 if (empty || tie->pos < ie->pos) {

  528. 		     ie = tie; 

  529. 		     stream_id = i;

  530. 		 }

  531. 		 empty = 0;

  532. 	    }

  533. 	    if (!empty) {

  534. 	        avi_stream2fourcc(&tag[0], stream_id, 

  535. 		                  s->streams[stream_id]->codec.codec_type); 

  536. 	        put_tag(pb, &tag[0]);

  537. 		put_le32(pb, ie->flags);

  538.                 put_le32(pb, ie->pos);

  539.                 put_le32(pb, ie->len);

  540. 		entry[stream_id]++;

  541. 	    }

  542. 	} while (!empty);

  543. 	end_tag(pb, idx_chunk);

  544. 

  545.         /* Fill in frame/sample counters */

  546. 	file_size = url_ftell(pb);

  547.         nb_frames = 0;

  548.         for(n=0;n<s->nb_streams;n++) {

  549.             if (avi->frames_hdr_strm[n] != 0) {

  550.                 stream = &s->streams[n]->codec;

  551.                 url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);

  552.                 if (stream->codec_type == CODEC_TYPE_VIDEO) {

  553.                     put_le32(pb, stream->frame_number); 

  554.                     if (nb_frames < stream->frame_number)

  555.                         nb_frames = stream->frame_number;

  556.                 } else {

  557.                     if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3LAME) {

  558.                         put_le32(pb, stream->frame_number);

  559.                         nb_frames += stream->frame_number;

  560.                     } else {

  561.                         parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);

  562.                         put_le32(pb, avi->audio_strm_length[n] / au_ssize);

  563.                     }

  564.                 }

  565.             }

  566.        }

  567.        if (avi->frames_hdr_all != 0) {

  568.            url_fseek(pb, avi->frames_hdr_all, SEEK_SET);

  569.            put_le32(pb, nb_frames); 

  570.        }

  571.        url_fseek(pb, file_size, SEEK_SET);

  572.     }

  573.     return 0;

  574. }

  575. 

  576. static int avi_write_packet(AVFormatContext *s, int stream_index,

  577.                             uint8_t *buf, int size, int force_pts)

  578. {

  579.     AVIContext *avi = s->priv_data;

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

  581.     unsigned char tag[5];

  582.     unsigned int flags;

  583.     AVCodecContext *enc;

  584. 

  585.     if (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE) { 

  586.         avi_write_ix(s);

  587.         end_tag(pb, avi->movi_list);

  588.         

  589. 	if (avi->riff_id == 1)

  590. 	    avi_write_idx1(s);

  591. 

  592. 	end_tag(pb, avi->riff_start);

  593. 	avi->movi_list = avi_start_new_riff(avi, pb, "AVIX", "movi");

  594.     }

  595.     

  596.     enc = &s->streams[stream_index]->codec;

  597.     avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);

  598.     if (enc->codec_type == CODEC_TYPE_AUDIO) {

  599.        avi->audio_strm_length[stream_index] += size;

  600.        flags = 0x10;

  601.     } else

  602.        flags = enc->coded_frame->key_frame ? 0x10 : 0x00;

  603. 

  604.     if (!url_is_streamed(&s->pb)) {

  605.         AVIIndex* idx = &avi->indexes[stream_index];

  606. 	int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;

  607. 	int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;

  608.         if (idx->ents_allocated <= idx->entry) {

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

  610. 	    if (!idx->cluster)

  611. 	        return -1;

  612.             idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));

  613. 	    if (!idx->cluster[cl])

  614. 		return -1;

  615. 	    idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;

  616. 	}

  617.  	

  618. 	idx->cluster[cl][id].flags = flags; 

  619.         idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;

  620.         idx->cluster[cl][id].len = size;

  621. 	idx->entry++;

  622.     }

  623.     

  624.     put_buffer(pb, tag, 4);

  625.     put_le32(pb, size);

  626.     put_buffer(pb, buf, size);

  627.     if (size & 1)

  628.         put_byte(pb, 0);

  629. 

  630.     put_flush_packet(pb);

  631.     return 0;

  632. }

  633. 

  634. static int avi_write_trailer(AVFormatContext *s)

  635. {

  636.     AVIContext *avi = s->priv_data;

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

  638.     int res = 0;

  639.     int i, j, n, nb_frames;

  640.     offset_t file_size;

  641. 

  642.     if (avi->riff_id == 1) {

  643.         end_tag(pb, avi->movi_list);

  644.         res = avi_write_idx1(s);

  645. 	end_tag(pb, avi->riff_start);

  646.     } else {

  647.         avi_write_ix(s);

  648.         end_tag(pb, avi->movi_list);

  649. 	end_tag(pb, avi->riff_start);

  650. 

  651.         file_size = url_ftell(pb);

  652. 	url_fseek(pb, avi->odml_list - 8, SEEK_SET);

  653. 	put_tag(pb, "LIST"); /* Making this AVI OpenDML one */

  654. 	url_fskip(pb, 16);

  655. 

  656.         for (n=nb_frames=0;n<s->nb_streams;n++) {

  657.              AVCodecContext *stream = &s->streams[n]->codec;

  658.              if (stream->codec_type == CODEC_TYPE_VIDEO) {

  659.                  if (nb_frames < stream->frame_number)

  660.                      nb_frames = stream->frame_number;

  661.              } else {

  662.                  if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3LAME) {

  663.                      nb_frames += stream->frame_number;

  664.                 }

  665.             }

  666.         }

  667. 	put_le32(pb, nb_frames);

  668. 	url_fseek(pb, file_size, SEEK_SET);

  669.     }

  670.     put_flush_packet(pb);

  671. 

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

  673. 	 for (j=0; j<avi->indexes[i].ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)

  674.               av_free(avi->indexes[i].cluster[j]);

  675. 	 av_free(avi->indexes[i].cluster);

  676. 	 avi->indexes[i].cluster = NULL;

  677. 	 avi->indexes[i].ents_allocated = avi->indexes[i].entry = 0;

  678.     }

  679.     

  680.     return res;

  681. }

  682. 

  683. static AVOutputFormat avi_oformat = {

  684.     "avi",

  685.     "avi format",

  686.     "video/x-msvideo",

  687.     "avi",

  688.     sizeof(AVIContext),

  689.     CODEC_ID_MP2,

  690.     CODEC_ID_MPEG4,

  691.     avi_write_header,

  692.     avi_write_packet,

  693.     avi_write_trailer,

  694. };

  695. 

  696. int avienc_init(void)

  697. {

  698.     av_register_output_format(&avi_oformat);

  699.     return 0;

  700. }