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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_H263I, MKTAG('i', '2', '6', '3') },

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

  83.     { CODEC_ID_H263P, MKTAG('h', '2', '6', '3') },

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

  85. 

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

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

  88.     { CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x'), .invalid_asf = 1 },

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

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

  91.     { CODEC_ID_MPEG4, MKTAG('x', 'v', 'i', 'd'), .invalid_asf = 1 },

  92.     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's'), .invalid_asf = 1 },

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

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

  95.     { CODEC_ID_MPEG4, MKTAG('m', '4', 's', '2') },

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

  97. 

  98.     /* added based on MPlayer */

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

  100.     { CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', '1') },

  101.     { CODEC_ID_MPEG4, MKTAG('X', 'v', 'i', 'D') },

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

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

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

  105. 

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

  107.     { CODEC_ID_MSMPEG4V3, MKTAG('d', 'i', 'v', '3'), .invalid_asf = 1 },

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

  109. 

  110.     /* added based on MPlayer */

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

  112.     { CODEC_ID_MSMPEG4V3, MKTAG('m', 'p', 'g', '3') }, 

  113.     { CODEC_ID_MSMPEG4V3, MKTAG('m', 'p', '4', '3') }, 

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

  115.     { CODEC_ID_MSMPEG4V3, MKTAG('d', 'i', 'v', '5') }, 

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

  117.     { CODEC_ID_MSMPEG4V3, MKTAG('d', 'i', 'v', '6') }, 

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

  119.     { CODEC_ID_MSMPEG4V3, MKTAG('d', 'i', 'v', '4') }, 

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

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

  122.     { CODEC_ID_MSMPEG4V3, MKTAG('c', 'o', 'l', '1') }, 

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

  124.     { CODEC_ID_MSMPEG4V3, MKTAG('c', 'o', 'l', '0') }, 

  125. 

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

  127. 

  128.     /* added based on MPlayer */

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

  130.     { CODEC_ID_MSMPEG4V2, MKTAG('d', 'i', 'v', '2') },

  131.     { CODEC_ID_MSMPEG4V2, MKTAG('m', 'p', '4', '2') },

  132.  

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

  134. 

  135.     /* added based on MPlayer */

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

  137.     { CODEC_ID_MSMPEG4V1, MKTAG('d', 'i', 'v', '4') }, 

  138.     { CODEC_ID_MSMPEG4V1, MKTAG('m', 'p', 'g', '4') }, 

  139. 

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

  141. 

  142.     /* added based on MPlayer */

  143.     { CODEC_ID_WMV1, MKTAG('w', 'm', 'v', '1') }, 

  144. 

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

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

  147.     { CODEC_ID_DVVIDEO, MKTAG('D', 'V', 'S', 'D') }, 

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

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

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

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

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

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

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

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

  156.     { CODEC_ID_HUFFYUV, MKTAG('h', 'f', 'y', 'u') },

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

  158.     { CODEC_ID_CYUV, MKTAG('c', 'y', 'u', 'v') },

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

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

  161.     { CODEC_ID_INDEO3, MKTAG('i', 'v', '3', '1') },

  162.     { CODEC_ID_INDEO3, MKTAG('i', 'v', '3', '2') },

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

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

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

  166.     { 0, 0 },

  167. };

  168. 

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

  170. {

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

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

  173.             return tags->tag;

  174.         tags++;

  175.     }

  176.     return 0;

  177. }

  178. 

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

  180. {

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

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

  183.             return tags->tag;

  184.         tags++;

  185.     }

  186.     return 0;

  187. }

  188. 

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

  190. {

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

  192.         if (tags->tag == tag)

  193.             return tags->id;

  194.         tags++;

  195.     }

  196.     return CODEC_ID_NONE;

  197. }

  198. 

  199. unsigned int codec_get_bmp_tag(int id)

  200. {

  201.     return codec_get_tag(codec_bmp_tags, id);

  202. }

  203. 

  204. /* BITMAPINFOHEADER header */

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

  206. {

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

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

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

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

  211.     

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

  213.     /* compression type */

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

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

  216.     put_le32(pb, 0);

  217.     put_le32(pb, 0);

  218.     put_le32(pb, 0);

  219.     put_le32(pb, 0);

  220.     

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

  222. 

  223.     if (enc->extradata_size & 1)

  224.         put_byte(pb, 0);

  225. }

  226. 

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

  228. {

  229.     switch(stream->codec_id) {

  230.     case CODEC_ID_PCM_S16LE:

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

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

  233.         break;

  234.     case CODEC_ID_PCM_U8:

  235.     case CODEC_ID_PCM_ALAW:

  236.     case CODEC_ID_PCM_MULAW:

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

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

  239.         break;

  240.     case CODEC_ID_MP2:

  241.         *au_ssize = 1;

  242.         *au_scale = 1;

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

  244.     case CODEC_ID_MP3LAME:

  245.         *au_ssize = 1;

  246.         *au_scale = 1;

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

  248.     default:

  249.         *au_ssize = 1;

  250.         *au_scale = 1; 

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

  252.         break;

  253.     }

  254. }

  255. 

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

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

  258. {

  259.     offset_t loff;

  260.     int i;

  261.     

  262.     avi->riff_id++;

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

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

  265.     

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

  267.     put_tag(pb, riff_tag);

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

  269.     put_tag(pb, list_tag);

  270.     return loff;

  271. }

  272. 

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

  274.                                         enum CodecType type)

  275. {

  276.     tag[0] = '0';

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

  278.     if (type == CODEC_TYPE_VIDEO) {

  279.         tag[2] = 'd';

  280.         tag[3] = 'c';

  281.     } else {

  282.         tag[2] = 'w';

  283.         tag[3] = 'b';

  284.     }

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

  286.     return tag;

  287. }

  288. 

  289. static int avi_write_header(AVFormatContext *s)

  290. {

  291.     AVIContext *avi = s->priv_data;

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

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

  294.     AVCodecContext *stream, *video_enc;

  295.     offset_t list1, list2, strh, strf;

  296. 

  297.     /* header list */

  298.     avi->riff_id = 0;

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

  300. 

  301.     /* avi header */

  302.     put_tag(pb, "avih");

  303.     put_le32(pb, 14 * 4);

  304.     bitrate = 0;

  305. 

  306.     video_enc = NULL;

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

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

  309.         bitrate += stream->bit_rate;

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

  311.             video_enc = stream;

  312.     }

  313.     

  314.     nb_frames = 0;

  315. 

  316.     if(video_enc){

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

  318.     } else {

  319. 	put_le32(pb, 0);

  320.     }

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

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

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

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

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

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

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

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

  329.     if(video_enc){    

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

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

  332.     } else {

  333. 	put_le32(pb, 0);

  334. 	put_le32(pb, 0);

  335.     }	

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

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

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

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

  340.     

  341.     /* stream list */

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

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

  344.         put_tag(pb, "strl");

  345.     

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

  347. 

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

  349.         if (! stream->codec_tag) {

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

  351.         }

  352. 

  353.         /* stream generic header */

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

  355.         switch(stream->codec_type) {

  356.         case CODEC_TYPE_VIDEO:

  357.             put_tag(pb, "vids");

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

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

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

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

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

  363.             

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

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

  366. 

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

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

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

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

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

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

  373.             put_le16(pb, 0);

  374.             put_le16(pb, 0);

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

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

  377.             break;

  378.         case CODEC_TYPE_AUDIO:

  379.             put_tag(pb, "auds");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  394.             put_le32(pb, 0);

  395.             put_le32(pb, 0);

  396.             break;

  397.         default:

  398.             av_abort();

  399.         }

  400.         end_tag(pb, strh);

  401. 

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

  403.         switch(stream->codec_type) {

  404.         case CODEC_TYPE_VIDEO:

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

  406.             break;

  407.         case CODEC_TYPE_AUDIO:

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

  409.                 av_free(avi);

  410.                 return -1;

  411.             }

  412.             break;

  413.         default:

  414.             av_abort();

  415.         }

  416.         end_tag(pb, strf);

  417. 	

  418. 	if (!url_is_streamed(pb)) {

  419. 	    unsigned char tag[5];

  420. 	    int j;

  421.     

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

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

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

  425. 	     * for compatibility reasons.

  426. 	     */

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

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

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

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

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

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

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

  434. 	                            /* dwChunkId */

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

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

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

  438. 	         put_le64(pb, 0);

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

  440. 	}

  441. 	

  442.         end_tag(pb, list2);

  443.     }

  444.     

  445.     if (!url_is_streamed(pb)) {

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

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

  448.         put_tag(pb, "odml");

  449.         put_tag(pb, "dmlh");

  450.         put_le32(pb, 248);

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

  452.              put_le32(pb, 0);

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

  454.     }

  455. 

  456.     end_tag(pb, list1);

  457.     

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

  459.     put_tag(pb, "movi");

  460. 

  461.     put_flush_packet(pb);

  462. 

  463.     return 0;

  464. }

  465. 

  466. static int avi_write_ix(AVFormatContext *s)

  467. {

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

  469.     AVIContext *avi = s->priv_data;

  470.     unsigned char tag[5];

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

  472.     int i, j;

  473.     

  474.     if (avi->riff_id > AVI_MASTER_INDEX_SIZE)

  475.         return -1;

  476.     

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

  478. 	 offset_t ix, pos;

  479. 	 

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

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

  482. 	 

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

  484. 	 ix = url_ftell(pb); 

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

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

  487. 	                              /* chunk size */

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

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

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

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

  492. 	                              /* nEntriesInUse */

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

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

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

  496. 

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

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

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

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

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

  502.          }

  503. 	 put_flush_packet(pb);

  504.          pos = url_ftell(pb);

  505. 	

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

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

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

  509. 	 url_fskip(pb, 8);

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

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

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

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

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

  515. 

  516. 	 url_fseek(pb, pos, SEEK_SET);

  517.     }

  518.     return 0;

  519. }

  520. 

  521. static int avi_write_idx1(AVFormatContext *s)

  522. {

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

  524.     AVIContext *avi = s->priv_data;

  525.     offset_t file_size, idx_chunk;

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

  527.     AVCodecContext *stream;

  528.     unsigned char tag[5];

  529. 

  530.     if (!url_is_streamed(pb)) {

  531. 	AVIIentry* ie = 0, *tie;

  532. 	int entry[MAX_STREAMS];

  533. 	int empty, stream_id = -1;

  534. 

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

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

  537. 	do {

  538. 	    empty = 1;

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

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

  541. 		     continue;

  542. 		 

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

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

  545. 		     ie = tie; 

  546. 		     stream_id = i;

  547. 		 }

  548. 		 empty = 0;

  549. 	    }

  550. 	    if (!empty) {

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

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

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

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

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

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

  557. 		entry[stream_id]++;

  558. 	    }

  559. 	} while (!empty);

  560. 	end_tag(pb, idx_chunk);

  561. 

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

  563. 	file_size = url_ftell(pb);

  564.         nb_frames = 0;

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

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

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

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

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

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

  571.                     if (nb_frames < stream->frame_number)

  572.                         nb_frames = stream->frame_number;

  573.                 } else {

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

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

  576.                         nb_frames += stream->frame_number;

  577.                     } else {

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

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

  580.                     }

  581.                 }

  582.             }

  583.        }

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

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

  586.            put_le32(pb, nb_frames); 

  587.        }

  588.        url_fseek(pb, file_size, SEEK_SET);

  589.     }

  590.     return 0;

  591. }

  592. 

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

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

  595. {

  596.     AVIContext *avi = s->priv_data;

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

  598.     unsigned char tag[5];

  599.     unsigned int flags;

  600.     AVCodecContext *enc;

  601. 

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

  603.         avi_write_ix(s);

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

  605.         

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

  607. 	    avi_write_idx1(s);

  608. 

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

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

  611.     }

  612.     

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

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

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

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

  617.        flags = 0x10;

  618.     } else

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

  620. 

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

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

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

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

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

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

  627. 	    if (!idx->cluster)

  628. 	        return -1;

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

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

  631. 		return -1;

  632. 	    idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;

  633. 	}

  634.  	

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

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

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

  638. 	idx->entry++;

  639.     }

  640.     

  641.     put_buffer(pb, tag, 4);

  642.     put_le32(pb, size);

  643.     put_buffer(pb, buf, size);

  644.     if (size & 1)

  645.         put_byte(pb, 0);

  646. 

  647.     put_flush_packet(pb);

  648.     return 0;

  649. }

  650. 

  651. static int avi_write_trailer(AVFormatContext *s)

  652. {

  653.     AVIContext *avi = s->priv_data;

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

  655.     int res = 0;

  656.     int i, j, n, nb_frames;

  657.     offset_t file_size;

  658. 

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

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

  661.         res = avi_write_idx1(s);

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

  663.     } else {

  664.         avi_write_ix(s);

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

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

  667. 

  668.         file_size = url_ftell(pb);

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

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

  671. 	url_fskip(pb, 16);

  672. 

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

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

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

  676.                  if (nb_frames < stream->frame_number)

  677.                      nb_frames = stream->frame_number;

  678.              } else {

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

  680.                      nb_frames += stream->frame_number;

  681.                 }

  682.             }

  683.         }

  684. 	put_le32(pb, nb_frames);

  685. 	url_fseek(pb, file_size, SEEK_SET);

  686.     }

  687.     put_flush_packet(pb);

  688. 

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

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

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

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

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

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

  695.     }

  696.     

  697.     return res;

  698. }

  699. 

  700. static AVOutputFormat avi_oformat = {

  701.     "avi",

  702.     "avi format",

  703.     "video/x-msvideo",

  704.     "avi",

  705.     sizeof(AVIContext),

  706.     CODEC_ID_MP2,

  707.     CODEC_ID_MPEG4,

  708.     avi_write_header,

  709.     avi_write_packet,

  710.     avi_write_trailer,

  711. };

  712. 

  713. int avienc_init(void)

  714. {

  715.     av_register_output_format(&avi_oformat);

  716.     return 0;

  717. }