falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2610 Commits
32 Branches
293MB
Tree: d6896c49cc
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'd6896c49cc'
${ noResults }
FFmpeg/libavformat/avienc.c

723 lines
23KB
Raw Blame History 

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

  117. 

  118.     /* added based on MPlayer */

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  153.     { 0, 0 },

  154. };

  155. 

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

  157. {

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

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

  160.             return tags->tag;

  161.         tags++;

  162.     }

  163.     return 0;

  164. }

  165. 

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

  167. {

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

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

  170.             return tags->tag;

  171.         tags++;

  172.     }

  173.     return 0;

  174. }

  175. 

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

  177. {

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

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

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

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

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

  183.             return tags->id;

  184.         tags++;

  185.     }

  186.     return CODEC_ID_NONE;

  187. }

  188. 

  189. unsigned int codec_get_bmp_tag(int id)

  190. {

  191.     return codec_get_tag(codec_bmp_tags, id);

  192. }

  193. 

  194. unsigned int codec_get_wav_tag(int id)

  195. {

  196.     return codec_get_tag(codec_wav_tags, id);

  197. }

  198. 

  199. enum CodecID codec_get_bmp_id(unsigned int tag)

  200. {

  201.     return codec_get_id(codec_bmp_tags, tag);

  202. }

  203. 

  204. enum CodecID codec_get_wav_id(unsigned int tag)

  205. {

  206.     return codec_get_id(codec_wav_tags, tag);

  207. }

  208. 

  209. /* BITMAPINFOHEADER header */

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

  211. {

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

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

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

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

  216.     

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

  218.     /* compression type */

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

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

  221.     put_le32(pb, 0);

  222.     put_le32(pb, 0);

  223.     put_le32(pb, 0);

  224.     put_le32(pb, 0);

  225.     

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

  227. 

  228.     if (enc->extradata_size & 1)

  229.         put_byte(pb, 0);

  230. }

  231. 

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

  233. {

  234.     switch(stream->codec_id) {

  235.     case CODEC_ID_PCM_S16LE:

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

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

  238.         break;

  239.     case CODEC_ID_PCM_U8:

  240.     case CODEC_ID_PCM_ALAW:

  241.     case CODEC_ID_PCM_MULAW:

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

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

  244.         break;

  245.     case CODEC_ID_MP2:

  246.         *au_ssize = 1;

  247.         *au_scale = 1;

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

  249.     case CODEC_ID_MP3:

  250.         *au_ssize = 1;

  251.         *au_scale = 1;

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

  253.     default:

  254.         *au_ssize = 1;

  255.         *au_scale = 1; 

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

  257.         break;

  258.     }

  259. }

  260. 

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

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

  263. {

  264.     offset_t loff;

  265.     int i;

  266.     

  267.     avi->riff_id++;

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

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

  270.     

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

  272.     put_tag(pb, riff_tag);

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

  274.     put_tag(pb, list_tag);

  275.     return loff;

  276. }

  277. 

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

  279.                                         enum CodecType type)

  280. {

  281.     tag[0] = '0';

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

  283.     if (type == CODEC_TYPE_VIDEO) {

  284.         tag[2] = 'd';

  285.         tag[3] = 'c';

  286.     } else {

  287.         tag[2] = 'w';

  288.         tag[3] = 'b';

  289.     }

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

  291.     return tag;

  292. }

  293. 

  294. static int avi_write_header(AVFormatContext *s)

  295. {

  296.     AVIContext *avi = s->priv_data;

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

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

  299.     AVCodecContext *stream, *video_enc;

  300.     offset_t list1, list2, strh, strf;

  301. 

  302.     /* header list */

  303.     avi->riff_id = 0;

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

  305. 

  306.     /* avi header */

  307.     put_tag(pb, "avih");

  308.     put_le32(pb, 14 * 4);

  309.     bitrate = 0;

  310. 

  311.     video_enc = NULL;

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

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

  314.         bitrate += stream->bit_rate;

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

  316.             video_enc = stream;

  317.     }

  318.     

  319.     nb_frames = 0;

  320. 

  321.     if(video_enc){

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

  323.     } else {

  324. 	put_le32(pb, 0);

  325.     }

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

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

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

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

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

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

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

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

  334.     if(video_enc){    

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

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

  337.     } else {

  338. 	put_le32(pb, 0);

  339. 	put_le32(pb, 0);

  340.     }	

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

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

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

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

  345.     

  346.     /* stream list */

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

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

  349.         put_tag(pb, "strl");

  350.     

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

  352. 

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

  354.         if (! stream->codec_tag) {

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

  356.         }

  357. 

  358.         /* stream generic header */

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

  360.         switch(stream->codec_type) {

  361.         case CODEC_TYPE_VIDEO:

  362.             put_tag(pb, "vids");

  363.             put_le32(pb, stream->codec_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.             

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

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

  371. 

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

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

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

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

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

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

  378.             put_le16(pb, 0);

  379.             put_le16(pb, 0);

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

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

  382.             break;

  383.         case CODEC_TYPE_AUDIO:

  384.             put_tag(pb, "auds");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  399.             put_le32(pb, 0);

  400.             put_le32(pb, 0);

  401.             break;

  402.         default:

  403.             av_abort();

  404.         }

  405.         end_tag(pb, strh);

  406. 

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

  408.         switch(stream->codec_type) {

  409.         case CODEC_TYPE_VIDEO:

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

  411.             break;

  412.         case CODEC_TYPE_AUDIO:

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

  414.                 av_free(avi);

  415.                 return -1;

  416.             }

  417.             break;

  418.         default:

  419.             av_abort();

  420.         }

  421.         end_tag(pb, strf);

  422. 	

  423. 	if (!url_is_streamed(pb)) {

  424. 	    unsigned char tag[5];

  425. 	    int j;

  426.     

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

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

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

  430. 	     * for compatibility reasons.

  431. 	     */

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

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

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

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

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

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

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

  439. 	                            /* dwChunkId */

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

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

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

  443. 	         put_le64(pb, 0);

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

  445. 	}

  446. 	

  447.         end_tag(pb, list2);

  448.     }

  449.     

  450.     if (!url_is_streamed(pb)) {

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

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

  453.         put_tag(pb, "odml");

  454.         put_tag(pb, "dmlh");

  455.         put_le32(pb, 248);

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

  457.              put_le32(pb, 0);

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

  459.     }

  460. 

  461.     end_tag(pb, list1);

  462.     

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

  464.     put_tag(pb, "movi");

  465. 

  466.     put_flush_packet(pb);

  467. 

  468.     return 0;

  469. }

  470. 

  471. static int avi_write_ix(AVFormatContext *s)

  472. {

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

  474.     AVIContext *avi = s->priv_data;

  475.     unsigned char tag[5];

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

  477.     int i, j;

  478.     

  479.     if (avi->riff_id > AVI_MASTER_INDEX_SIZE)

  480.         return -1;

  481.     

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

  483. 	 offset_t ix, pos;

  484. 	 

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

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

  487. 	 

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

  489. 	 ix = url_ftell(pb); 

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

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

  492. 	                              /* chunk size */

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

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

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

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

  497. 	                              /* nEntriesInUse */

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

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

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

  501. 

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

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

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

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

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

  507.          }

  508. 	 put_flush_packet(pb);

  509.          pos = url_ftell(pb);

  510. 	

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

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

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

  514. 	 url_fskip(pb, 8);

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

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

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

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

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

  520. 

  521. 	 url_fseek(pb, pos, SEEK_SET);

  522.     }

  523.     return 0;

  524. }

  525. 

  526. static int avi_write_idx1(AVFormatContext *s)

  527. {

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

  529.     AVIContext *avi = s->priv_data;

  530.     offset_t file_size, idx_chunk;

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

  532.     AVCodecContext *stream;

  533.     unsigned char tag[5];

  534. 

  535.     if (!url_is_streamed(pb)) {

  536. 	AVIIentry* ie = 0, *tie;

  537. 	int entry[MAX_STREAMS];

  538. 	int empty, stream_id = -1;

  539. 

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

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

  542. 	do {

  543. 	    empty = 1;

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

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

  546. 		     continue;

  547. 		 

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

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

  550. 		     ie = tie; 

  551. 		     stream_id = i;

  552. 		 }

  553. 		 empty = 0;

  554. 	    }

  555. 	    if (!empty) {

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

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

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

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

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

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

  562. 		entry[stream_id]++;

  563. 	    }

  564. 	} while (!empty);

  565. 	end_tag(pb, idx_chunk);

  566. 

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

  568. 	file_size = url_ftell(pb);

  569.         nb_frames = 0;

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

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

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

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

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

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

  576.                     if (nb_frames < stream->frame_number)

  577.                         nb_frames = stream->frame_number;

  578.                 } else {

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

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

  581.                         nb_frames += stream->frame_number;

  582.                     } else {

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

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

  585.                     }

  586.                 }

  587.             }

  588.        }

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

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

  591.            put_le32(pb, nb_frames); 

  592.        }

  593.        url_fseek(pb, file_size, SEEK_SET);

  594.     }

  595.     return 0;

  596. }

  597. 

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

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

  600. {

  601.     AVIContext *avi = s->priv_data;

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

  603.     unsigned char tag[5];

  604.     unsigned int flags;

  605.     AVCodecContext *enc;

  606. 

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

  608.         avi_write_ix(s);

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

  610.         

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

  612. 	    avi_write_idx1(s);

  613. 

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

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

  616.     }

  617.     

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

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

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

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

  622.        flags = 0x10;

  623.     } else

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

  625. 

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

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

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

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

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

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

  632. 	    if (!idx->cluster)

  633. 	        return -1;

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

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

  636. 		return -1;

  637. 	    idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;

  638. 	}

  639.  	

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

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

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

  643. 	idx->entry++;

  644.     }

  645.     

  646.     put_buffer(pb, tag, 4);

  647.     put_le32(pb, size);

  648.     put_buffer(pb, buf, size);

  649.     if (size & 1)

  650.         put_byte(pb, 0);

  651. 

  652.     put_flush_packet(pb);

  653.     return 0;

  654. }

  655. 

  656. static int avi_write_trailer(AVFormatContext *s)

  657. {

  658.     AVIContext *avi = s->priv_data;

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

  660.     int res = 0;

  661.     int i, j, n, nb_frames;

  662.     offset_t file_size;

  663. 

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

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

  666.         res = avi_write_idx1(s);

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

  668.     } else {

  669.         avi_write_ix(s);

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

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

  672. 

  673.         file_size = url_ftell(pb);

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

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

  676. 	url_fskip(pb, 16);

  677. 

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

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

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

  681.                  if (nb_frames < stream->frame_number)

  682.                      nb_frames = stream->frame_number;

  683.              } else {

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

  685.                      nb_frames += stream->frame_number;

  686.                 }

  687.             }

  688.         }

  689. 	put_le32(pb, nb_frames);

  690. 	url_fseek(pb, file_size, SEEK_SET);

  691.     }

  692.     put_flush_packet(pb);

  693. 

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

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

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

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

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

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

  700.     }

  701.     

  702.     return res;

  703. }

  704. 

  705. static AVOutputFormat avi_oformat = {

  706.     "avi",

  707.     "avi format",

  708.     "video/x-msvideo",

  709.     "avi",

  710.     sizeof(AVIContext),

  711.     CODEC_ID_MP2,

  712.     CODEC_ID_MPEG4,

  713.     avi_write_header,

  714.     avi_write_packet,

  715.     avi_write_trailer,

  716. };

  717. 

  718. int avienc_init(void)

  719. {

  720.     av_register_output_format(&avi_oformat);

  721.     return 0;

  722. }