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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. #ifdef CONFIG_ENCODERS

  28. typedef struct AVIIentry {

  29.     unsigned int flags, pos, len;

  30. } AVIIentry;

  31. 

  32. #define AVI_INDEX_CLUSTER_SIZE 16384

  33. 

  34. typedef struct AVIIndex {

  35.     offset_t    indx_start;

  36.     int         entry;

  37.     int         ents_allocated;

  38.     AVIIentry** cluster;

  39. } AVIIndex;

  40. 

  41. typedef struct {

  42.     offset_t riff_start, movi_list, odml_list;

  43.     offset_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS];

  44.     int audio_strm_length[MAX_STREAMS];

  45.     int riff_id;

  46. 

  47.     AVIIndex indexes[MAX_STREAMS];

  48. } AVIContext;

  49. 

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

  51. {

  52.     int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;

  53.     int id = ent_id % AVI_INDEX_CLUSTER_SIZE;

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

  55. }

  56. 

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

  58. {

  59.     put_tag(pb, tag);

  60.     put_le32(pb, 0);

  61.     return url_ftell(pb);

  62. }

  63. 

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

  65. {

  66.     offset_t pos;

  67. 

  68.     pos = url_ftell(pb);

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

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

  71.     url_fseek(pb, pos, SEEK_SET);

  72. }

  73. #endif //CONFIG_ENCODERS

  74. 

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

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

  77. const CodecTag codec_bmp_tags[] = {

  78.     { CODEC_ID_H264, MKTAG('H', '2', '6', '4') },

  79. 

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

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

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

  83. 

  84.     /* added based on MPlayer */

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

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

  87. 

  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('M', 'P', '4', 'S') },

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

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

  94. 

  95.     /* added based on MPlayer */

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

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

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

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

  100. 

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

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

  103. 

  104.     /* added based on MPlayer */

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

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

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

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

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

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

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

  112. 

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

  114. 

  115.     /* added based on MPlayer */

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

  117.  

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

  119. 

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

  121. 

  122.     /* added based on MPlayer */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  147.     { CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },

  148.     { CODEC_ID_MSRLE, MKTAG('m', 'r', 'l', 'e') },

  149.     { CODEC_ID_MSRLE, MKTAG(0x1, 0x0, 0x0, 0x0) },

  150.     { CODEC_ID_MSVIDEO1, MKTAG('M', 'S', 'V', 'C') },

  151.     { CODEC_ID_MSVIDEO1, MKTAG('m', 's', 'v', 'c') },

  152.     { CODEC_ID_MSVIDEO1, MKTAG('C', 'R', 'A', 'M') },

  153.     { CODEC_ID_MSVIDEO1, MKTAG('c', 'r', 'a', 'm') },

  154.     { CODEC_ID_MSVIDEO1, MKTAG('W', 'H', 'A', 'M') },

  155.     { CODEC_ID_MSVIDEO1, MKTAG('w', 'h', 'a', 'm') },

  156.     { CODEC_ID_CINEPAK, MKTAG('c', 'v', 'i', 'd') },

  157.     { 0, 0 },

  158. };

  159. 

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

  161. {

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

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

  164.             return tags->tag;

  165.         tags++;

  166.     }

  167.     return 0;

  168. }

  169. 

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

  171. {

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

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

  174.             return tags->tag;

  175.         tags++;

  176.     }

  177.     return 0;

  178. }

  179. 

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

  181. {

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

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

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

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

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

  187.             return tags->id;

  188.         tags++;

  189.     }

  190.     return CODEC_ID_NONE;

  191. }

  192. 

  193. unsigned int codec_get_bmp_tag(int id)

  194. {

  195.     return codec_get_tag(codec_bmp_tags, id);

  196. }

  197. 

  198. unsigned int codec_get_wav_tag(int id)

  199. {

  200.     return codec_get_tag(codec_wav_tags, id);

  201. }

  202. 

  203. enum CodecID codec_get_bmp_id(unsigned int tag)

  204. {

  205.     return codec_get_id(codec_bmp_tags, tag);

  206. }

  207. 

  208. enum CodecID codec_get_wav_id(unsigned int tag)

  209. {

  210.     return codec_get_id(codec_wav_tags, tag);

  211. }

  212. 

  213. #ifdef CONFIG_ENCODERS

  214. /* BITMAPINFOHEADER header */

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

  216. {

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

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

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

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

  221.     

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

  223.     /* compression type */

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

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

  226.     put_le32(pb, 0);

  227.     put_le32(pb, 0);

  228.     put_le32(pb, 0);

  229.     put_le32(pb, 0);

  230.     

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

  232. 

  233.     if (enc->extradata_size & 1)

  234.         put_byte(pb, 0);

  235. }

  236. 

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

  238. {

  239.     switch(stream->codec_id) {

  240.     case CODEC_ID_PCM_S16LE:

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

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

  243.         break;

  244.     case CODEC_ID_PCM_U8:

  245.     case CODEC_ID_PCM_ALAW:

  246.     case CODEC_ID_PCM_MULAW:

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

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

  249.         break;

  250.     case CODEC_ID_MP2:

  251.         *au_ssize = 1;

  252.         *au_scale = 1;

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

  254.     case CODEC_ID_MP3:

  255.         *au_ssize = 1;

  256.         *au_scale = 1;

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

  258.     default:

  259.         *au_ssize = 1;

  260.         *au_scale = 1; 

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

  262.         break;

  263.     }

  264. }

  265. 

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

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

  268. {

  269.     offset_t loff;

  270.     int i;

  271.     

  272.     avi->riff_id++;

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

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

  275.     

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

  277.     put_tag(pb, riff_tag);

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

  279.     put_tag(pb, list_tag);

  280.     return loff;

  281. }

  282. 

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

  284.                                         enum CodecType type)

  285. {

  286.     tag[0] = '0';

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

  288.     if (type == CODEC_TYPE_VIDEO) {

  289.         tag[2] = 'd';

  290.         tag[3] = 'c';

  291.     } else {

  292.         tag[2] = 'w';

  293.         tag[3] = 'b';

  294.     }

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

  296.     return tag;

  297. }

  298. 

  299. static int avi_write_header(AVFormatContext *s)

  300. {

  301.     AVIContext *avi = s->priv_data;

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

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

  304.     AVCodecContext *stream, *video_enc;

  305.     offset_t list1, list2, strh, strf;

  306. 

  307.     /* header list */

  308.     avi->riff_id = 0;

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

  310. 

  311.     /* avi header */

  312.     put_tag(pb, "avih");

  313.     put_le32(pb, 14 * 4);

  314.     bitrate = 0;

  315. 

  316.     video_enc = NULL;

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

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

  319.         bitrate += stream->bit_rate;

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

  321.             video_enc = stream;

  322.     }

  323.     

  324.     nb_frames = 0;

  325. 

  326.     if(video_enc){

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

  328.     } else {

  329. 	put_le32(pb, 0);

  330.     }

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

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

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

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

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

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

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

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

  339.     if(video_enc){    

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

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

  342.     } else {

  343. 	put_le32(pb, 0);

  344. 	put_le32(pb, 0);

  345.     }	

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

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

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

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

  350.     

  351.     /* stream list */

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

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

  354.         put_tag(pb, "strl");

  355.     

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

  357. 

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

  359.         if (! stream->codec_tag) {

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

  361.         }

  362. 

  363.         /* stream generic header */

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

  365.         switch(stream->codec_type) {

  366.         case CODEC_TYPE_VIDEO:

  367.             put_tag(pb, "vids");

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

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

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

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

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

  373.             

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

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

  376. 

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

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

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

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

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

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

  383.             put_le16(pb, 0);

  384.             put_le16(pb, 0);

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

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

  387.             break;

  388.         case CODEC_TYPE_AUDIO:

  389.             put_tag(pb, "auds");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  404.             put_le32(pb, 0);

  405.             put_le32(pb, 0);

  406.             break;

  407.         default:

  408.             av_abort();

  409.         }

  410.         end_tag(pb, strh);

  411. 

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

  413.         switch(stream->codec_type) {

  414.         case CODEC_TYPE_VIDEO:

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

  416.             break;

  417.         case CODEC_TYPE_AUDIO:

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

  419.                 av_free(avi);

  420.                 return -1;

  421.             }

  422.             break;

  423.         default:

  424.             av_abort();

  425.         }

  426.         end_tag(pb, strf);

  427. 	

  428. 	if (!url_is_streamed(pb)) {

  429. 	    unsigned char tag[5];

  430. 	    int j;

  431.     

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

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

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

  435. 	     * for compatibility reasons.

  436. 	     */

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

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

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

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

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

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

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

  444. 	                            /* dwChunkId */

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

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

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

  448. 	         put_le64(pb, 0);

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

  450. 	}

  451. 	

  452.         end_tag(pb, list2);

  453.     }

  454.     

  455.     if (!url_is_streamed(pb)) {

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

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

  458.         put_tag(pb, "odml");

  459.         put_tag(pb, "dmlh");

  460.         put_le32(pb, 248);

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

  462.              put_le32(pb, 0);

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

  464.     }

  465. 

  466.     end_tag(pb, list1);

  467.     

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

  469.     put_tag(pb, "movi");

  470. 

  471.     put_flush_packet(pb);

  472. 

  473.     return 0;

  474. }

  475. 

  476. static int avi_write_ix(AVFormatContext *s)

  477. {

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

  479.     AVIContext *avi = s->priv_data;

  480.     unsigned char tag[5];

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

  482.     int i, j;

  483.     

  484.     if (avi->riff_id > AVI_MASTER_INDEX_SIZE)

  485.         return -1;

  486.     

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

  488. 	 offset_t ix, pos;

  489. 	 

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

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

  492. 	 

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

  494. 	 ix = url_ftell(pb); 

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

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

  497. 	                              /* chunk size */

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

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

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

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

  502. 	                              /* nEntriesInUse */

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

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

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

  506. 

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

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

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

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

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

  512.          }

  513. 	 put_flush_packet(pb);

  514.          pos = url_ftell(pb);

  515. 	

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

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

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

  519. 	 url_fskip(pb, 8);

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

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

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

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

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

  525. 

  526. 	 url_fseek(pb, pos, SEEK_SET);

  527.     }

  528.     return 0;

  529. }

  530. 

  531. static int avi_write_idx1(AVFormatContext *s)

  532. {

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

  534.     AVIContext *avi = s->priv_data;

  535.     offset_t file_size, idx_chunk;

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

  537.     AVCodecContext *stream;

  538.     unsigned char tag[5];

  539. 

  540.     if (!url_is_streamed(pb)) {

  541. 	AVIIentry* ie = 0, *tie;

  542. 	int entry[MAX_STREAMS];

  543. 	int empty, stream_id = -1;

  544. 

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

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

  547. 	do {

  548. 	    empty = 1;

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

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

  551. 		     continue;

  552. 		 

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

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

  555. 		     ie = tie; 

  556. 		     stream_id = i;

  557. 		 }

  558. 		 empty = 0;

  559. 	    }

  560. 	    if (!empty) {

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

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

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

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

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

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

  567. 		entry[stream_id]++;

  568. 	    }

  569. 	} while (!empty);

  570. 	end_tag(pb, idx_chunk);

  571. 

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

  573. 	file_size = url_ftell(pb);

  574.         nb_frames = 0;

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

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

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

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

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

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

  581.                     if (nb_frames < stream->frame_number)

  582.                         nb_frames = stream->frame_number;

  583.                 } else {

  584.                     if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {

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

  586.                         nb_frames += stream->frame_number;

  587.                     } else {

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

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

  590.                     }

  591.                 }

  592.             }

  593.        }

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

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

  596.            put_le32(pb, nb_frames); 

  597.        }

  598.        url_fseek(pb, file_size, SEEK_SET);

  599.     }

  600.     return 0;

  601. }

  602. 

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

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

  605. {

  606.     AVIContext *avi = s->priv_data;

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

  608.     unsigned char tag[5];

  609.     unsigned int flags;

  610.     AVCodecContext *enc;

  611. 

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

  613.         avi_write_ix(s);

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

  615.         

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

  617. 	    avi_write_idx1(s);

  618. 

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

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

  621.     }

  622.     

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

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

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

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

  627.        flags = 0x10;

  628.     } else

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

  630. 

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

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

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

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

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

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

  637. 	    if (!idx->cluster)

  638. 	        return -1;

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

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

  641. 		return -1;

  642. 	    idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;

  643. 	}

  644.  	

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

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

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

  648. 	idx->entry++;

  649.     }

  650.     

  651.     put_buffer(pb, tag, 4);

  652.     put_le32(pb, size);

  653.     put_buffer(pb, buf, size);

  654.     if (size & 1)

  655.         put_byte(pb, 0);

  656. 

  657.     put_flush_packet(pb);

  658.     return 0;

  659. }

  660. 

  661. static int avi_write_trailer(AVFormatContext *s)

  662. {

  663.     AVIContext *avi = s->priv_data;

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

  665.     int res = 0;

  666.     int i, j, n, nb_frames;

  667.     offset_t file_size;

  668. 

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

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

  671.         res = avi_write_idx1(s);

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

  673.     } else {

  674.         avi_write_ix(s);

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

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

  677. 

  678.         file_size = url_ftell(pb);

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

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

  681. 	url_fskip(pb, 16);

  682. 

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

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

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

  686.                  if (nb_frames < stream->frame_number)

  687.                      nb_frames = stream->frame_number;

  688.              } else {

  689.                  if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {

  690.                      nb_frames += stream->frame_number;

  691.                 }

  692.             }

  693.         }

  694. 	put_le32(pb, nb_frames);

  695. 	url_fseek(pb, file_size, SEEK_SET);

  696.     }

  697.     put_flush_packet(pb);

  698. 

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

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

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

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

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

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

  705.     }

  706.     

  707.     return res;

  708. }

  709. 

  710. static AVOutputFormat avi_oformat = {

  711.     "avi",

  712.     "avi format",

  713.     "video/x-msvideo",

  714.     "avi",

  715.     sizeof(AVIContext),

  716.     CODEC_ID_MP2,

  717.     CODEC_ID_MPEG4,

  718.     avi_write_header,

  719.     avi_write_packet,

  720.     avi_write_trailer,

  721. };

  722. 

  723. int avienc_init(void)

  724. {

  725.     av_register_output_format(&avi_oformat);

  726.     return 0;

  727. }

  728. #endif //CONFIG_ENCODERS