Libav
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00001 /* 00002 * AVI muxer 00003 * Copyright (c) 2000 Fabrice Bellard 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 #include "avformat.h" 00022 #include "avi.h" 00023 #include "riff.h" 00024 #include "libavutil/intreadwrite.h" 00025 00026 /* 00027 * TODO: 00028 * - fill all fields if non streamed (nb_frames for example) 00029 */ 00030 00031 typedef struct AVIIentry { 00032 unsigned int flags, pos, len; 00033 } AVIIentry; 00034 00035 #define AVI_INDEX_CLUSTER_SIZE 16384 00036 00037 typedef struct AVIIndex { 00038 int64_t indx_start; 00039 int entry; 00040 int ents_allocated; 00041 AVIIentry** cluster; 00042 } AVIIndex; 00043 00044 typedef struct { 00045 int64_t riff_start, movi_list, odml_list; 00046 int64_t frames_hdr_all; 00047 int riff_id; 00048 } AVIContext; 00049 00050 typedef struct { 00051 int64_t frames_hdr_strm; 00052 int audio_strm_length; 00053 int packet_count; 00054 int entry; 00055 00056 AVIIndex indexes; 00057 } AVIStream ; 00058 00059 static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id) 00060 { 00061 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE; 00062 int id = ent_id % AVI_INDEX_CLUSTER_SIZE; 00063 return &idx->cluster[cl][id]; 00064 } 00065 00066 static int64_t avi_start_new_riff(AVFormatContext *s, ByteIOContext *pb, 00067 const char* riff_tag, const char* list_tag) 00068 { 00069 AVIContext *avi= s->priv_data; 00070 int64_t loff; 00071 int i; 00072 00073 avi->riff_id++; 00074 for (i=0; i<s->nb_streams; i++){ 00075 AVIStream *avist= s->streams[i]->priv_data; 00076 avist->indexes.entry = 0; 00077 } 00078 00079 avi->riff_start = ff_start_tag(pb, "RIFF"); 00080 put_tag(pb, riff_tag); 00081 loff = ff_start_tag(pb, "LIST"); 00082 put_tag(pb, list_tag); 00083 return loff; 00084 } 00085 00086 static char* avi_stream2fourcc(char* tag, int index, enum AVMediaType type) 00087 { 00088 tag[0] = '0'; 00089 tag[1] = '0' + index; 00090 if (type == AVMEDIA_TYPE_VIDEO) { 00091 tag[2] = 'd'; 00092 tag[3] = 'c'; 00093 } else if (type == AVMEDIA_TYPE_SUBTITLE) { 00094 // note: this is not an official code 00095 tag[2] = 's'; 00096 tag[3] = 'b'; 00097 } else { 00098 tag[2] = 'w'; 00099 tag[3] = 'b'; 00100 } 00101 tag[4] = '\0'; 00102 return tag; 00103 } 00104 00105 static void avi_write_info_tag(ByteIOContext *pb, const char *tag, const char *str) 00106 { 00107 int len = strlen(str); 00108 if (len > 0) { 00109 len++; 00110 put_tag(pb, tag); 00111 put_le32(pb, len); 00112 put_strz(pb, str); 00113 if (len & 1) 00114 put_byte(pb, 0); 00115 } 00116 } 00117 00118 static int avi_write_counters(AVFormatContext* s, int riff_id) 00119 { 00120 ByteIOContext *pb = s->pb; 00121 AVIContext *avi = s->priv_data; 00122 int n, au_byterate, au_ssize, au_scale, nb_frames = 0; 00123 int64_t file_size; 00124 AVCodecContext* stream; 00125 00126 file_size = url_ftell(pb); 00127 for(n = 0; n < s->nb_streams; n++) { 00128 AVIStream *avist= s->streams[n]->priv_data; 00129 00130 assert(avist->frames_hdr_strm); 00131 stream = s->streams[n]->codec; 00132 url_fseek(pb, avist->frames_hdr_strm, SEEK_SET); 00133 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); 00134 if(au_ssize == 0) { 00135 put_le32(pb, avist->packet_count); 00136 } else { 00137 put_le32(pb, avist->audio_strm_length / au_ssize); 00138 } 00139 if(stream->codec_type == AVMEDIA_TYPE_VIDEO) 00140 nb_frames = FFMAX(nb_frames, avist->packet_count); 00141 } 00142 if(riff_id == 1) { 00143 assert(avi->frames_hdr_all); 00144 url_fseek(pb, avi->frames_hdr_all, SEEK_SET); 00145 put_le32(pb, nb_frames); 00146 } 00147 url_fseek(pb, file_size, SEEK_SET); 00148 00149 return 0; 00150 } 00151 00152 static int avi_write_header(AVFormatContext *s) 00153 { 00154 AVIContext *avi = s->priv_data; 00155 ByteIOContext *pb = s->pb; 00156 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale; 00157 AVCodecContext *stream, *video_enc; 00158 int64_t list1, list2, strh, strf; 00159 AVMetadataTag *t = NULL; 00160 00161 for(n=0;n<s->nb_streams;n++) { 00162 s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream)); 00163 if(!s->streams[n]->priv_data) 00164 return AVERROR(ENOMEM); 00165 } 00166 00167 /* header list */ 00168 avi->riff_id = 0; 00169 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl"); 00170 00171 /* avi header */ 00172 put_tag(pb, "avih"); 00173 put_le32(pb, 14 * 4); 00174 bitrate = 0; 00175 00176 video_enc = NULL; 00177 for(n=0;n<s->nb_streams;n++) { 00178 stream = s->streams[n]->codec; 00179 bitrate += stream->bit_rate; 00180 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) 00181 video_enc = stream; 00182 } 00183 00184 nb_frames = 0; 00185 00186 if(video_enc){ 00187 put_le32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den)); 00188 } else { 00189 put_le32(pb, 0); 00190 } 00191 put_le32(pb, bitrate / 8); /* XXX: not quite exact */ 00192 put_le32(pb, 0); /* padding */ 00193 if (url_is_streamed(pb)) 00194 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */ 00195 else 00196 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */ 00197 avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */ 00198 put_le32(pb, nb_frames); /* nb frames, filled later */ 00199 put_le32(pb, 0); /* initial frame */ 00200 put_le32(pb, s->nb_streams); /* nb streams */ 00201 put_le32(pb, 1024 * 1024); /* suggested buffer size */ 00202 if(video_enc){ 00203 put_le32(pb, video_enc->width); 00204 put_le32(pb, video_enc->height); 00205 } else { 00206 put_le32(pb, 0); 00207 put_le32(pb, 0); 00208 } 00209 put_le32(pb, 0); /* reserved */ 00210 put_le32(pb, 0); /* reserved */ 00211 put_le32(pb, 0); /* reserved */ 00212 put_le32(pb, 0); /* reserved */ 00213 00214 /* stream list */ 00215 for(i=0;i<n;i++) { 00216 AVIStream *avist= s->streams[i]->priv_data; 00217 list2 = ff_start_tag(pb, "LIST"); 00218 put_tag(pb, "strl"); 00219 00220 stream = s->streams[i]->codec; 00221 00222 /* stream generic header */ 00223 strh = ff_start_tag(pb, "strh"); 00224 switch(stream->codec_type) { 00225 case AVMEDIA_TYPE_SUBTITLE: 00226 // XSUB subtitles behave like video tracks, other subtitles 00227 // are not (yet) supported. 00228 if (stream->codec_id != CODEC_ID_XSUB) break; 00229 case AVMEDIA_TYPE_VIDEO: put_tag(pb, "vids"); break; 00230 case AVMEDIA_TYPE_AUDIO: put_tag(pb, "auds"); break; 00231 // case AVMEDIA_TYPE_TEXT : put_tag(pb, "txts"); break; 00232 case AVMEDIA_TYPE_DATA : put_tag(pb, "dats"); break; 00233 } 00234 if(stream->codec_type == AVMEDIA_TYPE_VIDEO || 00235 stream->codec_id == CODEC_ID_XSUB) 00236 put_le32(pb, stream->codec_tag); 00237 else 00238 put_le32(pb, 1); 00239 put_le32(pb, 0); /* flags */ 00240 put_le16(pb, 0); /* priority */ 00241 put_le16(pb, 0); /* language */ 00242 put_le32(pb, 0); /* initial frame */ 00243 00244 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); 00245 00246 put_le32(pb, au_scale); /* scale */ 00247 put_le32(pb, au_byterate); /* rate */ 00248 av_set_pts_info(s->streams[i], 64, au_scale, au_byterate); 00249 00250 put_le32(pb, 0); /* start */ 00251 avist->frames_hdr_strm = url_ftell(pb); /* remember this offset to fill later */ 00252 if (url_is_streamed(pb)) 00253 put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */ 00254 else 00255 put_le32(pb, 0); /* length, XXX: filled later */ 00256 00257 /* suggested buffer size */ //FIXME set at the end to largest chunk 00258 if(stream->codec_type == AVMEDIA_TYPE_VIDEO) 00259 put_le32(pb, 1024 * 1024); 00260 else if(stream->codec_type == AVMEDIA_TYPE_AUDIO) 00261 put_le32(pb, 12 * 1024); 00262 else 00263 put_le32(pb, 0); 00264 put_le32(pb, -1); /* quality */ 00265 put_le32(pb, au_ssize); /* sample size */ 00266 put_le32(pb, 0); 00267 put_le16(pb, stream->width); 00268 put_le16(pb, stream->height); 00269 ff_end_tag(pb, strh); 00270 00271 if(stream->codec_type != AVMEDIA_TYPE_DATA){ 00272 strf = ff_start_tag(pb, "strf"); 00273 switch(stream->codec_type) { 00274 case AVMEDIA_TYPE_SUBTITLE: 00275 // XSUB subtitles behave like video tracks, other subtitles 00276 // are not (yet) supported. 00277 if (stream->codec_id != CODEC_ID_XSUB) break; 00278 case AVMEDIA_TYPE_VIDEO: 00279 ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0); 00280 break; 00281 case AVMEDIA_TYPE_AUDIO: 00282 if (ff_put_wav_header(pb, stream) < 0) { 00283 return -1; 00284 } 00285 break; 00286 default: 00287 return -1; 00288 } 00289 ff_end_tag(pb, strf); 00290 if ((t = av_metadata_get(s->streams[i]->metadata, "strn", NULL, 0))) { 00291 avi_write_info_tag(s->pb, t->key, t->value); 00292 t = NULL; 00293 } 00294 //FIXME a limitation of metadata conversion system 00295 else if ((t = av_metadata_get(s->streams[i]->metadata, "INAM", NULL, 0))) { 00296 avi_write_info_tag(s->pb, "strn", t->value); 00297 t = NULL; 00298 } 00299 } 00300 00301 if (!url_is_streamed(pb)) { 00302 unsigned char tag[5]; 00303 int j; 00304 00305 /* Starting to lay out AVI OpenDML master index. 00306 * We want to make it JUNK entry for now, since we'd 00307 * like to get away without making AVI an OpenDML one 00308 * for compatibility reasons. 00309 */ 00310 avist->indexes.entry = avist->indexes.ents_allocated = 0; 00311 avist->indexes.indx_start = ff_start_tag(pb, "JUNK"); 00312 put_le16(pb, 4); /* wLongsPerEntry */ 00313 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */ 00314 put_byte(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */ 00315 put_le32(pb, 0); /* nEntriesInUse (will fill out later on) */ 00316 put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type)); 00317 /* dwChunkId */ 00318 put_le64(pb, 0); /* dwReserved[3] 00319 put_le32(pb, 0); Must be 0. */ 00320 for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++) 00321 put_le64(pb, 0); 00322 ff_end_tag(pb, avist->indexes.indx_start); 00323 } 00324 00325 if( stream->codec_type == AVMEDIA_TYPE_VIDEO 00326 && s->streams[i]->sample_aspect_ratio.num>0 00327 && s->streams[i]->sample_aspect_ratio.den>0){ 00328 int vprp= ff_start_tag(pb, "vprp"); 00329 AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio, 00330 (AVRational){stream->width, stream->height}); 00331 int num, den; 00332 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF); 00333 00334 put_le32(pb, 0); //video format = unknown 00335 put_le32(pb, 0); //video standard= unknown 00336 put_le32(pb, lrintf(1.0/av_q2d(stream->time_base))); 00337 put_le32(pb, stream->width ); 00338 put_le32(pb, stream->height); 00339 put_le16(pb, den); 00340 put_le16(pb, num); 00341 put_le32(pb, stream->width ); 00342 put_le32(pb, stream->height); 00343 put_le32(pb, 1); //progressive FIXME 00344 00345 put_le32(pb, stream->height); 00346 put_le32(pb, stream->width ); 00347 put_le32(pb, stream->height); 00348 put_le32(pb, stream->width ); 00349 put_le32(pb, 0); 00350 put_le32(pb, 0); 00351 00352 put_le32(pb, 0); 00353 put_le32(pb, 0); 00354 ff_end_tag(pb, vprp); 00355 } 00356 00357 ff_end_tag(pb, list2); 00358 } 00359 00360 if (!url_is_streamed(pb)) { 00361 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */ 00362 avi->odml_list = ff_start_tag(pb, "JUNK"); 00363 put_tag(pb, "odml"); 00364 put_tag(pb, "dmlh"); 00365 put_le32(pb, 248); 00366 for (i = 0; i < 248; i+= 4) 00367 put_le32(pb, 0); 00368 ff_end_tag(pb, avi->odml_list); 00369 } 00370 00371 ff_end_tag(pb, list1); 00372 00373 list2 = ff_start_tag(pb, "LIST"); 00374 put_tag(pb, "INFO"); 00375 for (i = 0; *ff_avi_tags[i]; i++) { 00376 if ((t = av_metadata_get(s->metadata, ff_avi_tags[i], NULL, AV_METADATA_MATCH_CASE))) 00377 avi_write_info_tag(s->pb, t->key, t->value); 00378 } 00379 ff_end_tag(pb, list2); 00380 00381 /* some padding for easier tag editing */ 00382 list2 = ff_start_tag(pb, "JUNK"); 00383 for (i = 0; i < 1016; i += 4) 00384 put_le32(pb, 0); 00385 ff_end_tag(pb, list2); 00386 00387 avi->movi_list = ff_start_tag(pb, "LIST"); 00388 put_tag(pb, "movi"); 00389 00390 put_flush_packet(pb); 00391 00392 return 0; 00393 } 00394 00395 static int avi_write_ix(AVFormatContext *s) 00396 { 00397 ByteIOContext *pb = s->pb; 00398 AVIContext *avi = s->priv_data; 00399 char tag[5]; 00400 char ix_tag[] = "ix00"; 00401 int i, j; 00402 00403 assert(!url_is_streamed(pb)); 00404 00405 if (avi->riff_id > AVI_MASTER_INDEX_SIZE) 00406 return -1; 00407 00408 for (i=0;i<s->nb_streams;i++) { 00409 AVIStream *avist= s->streams[i]->priv_data; 00410 int64_t ix, pos; 00411 00412 avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type); 00413 ix_tag[3] = '0' + i; 00414 00415 /* Writing AVI OpenDML leaf index chunk */ 00416 ix = url_ftell(pb); 00417 put_tag(pb, &ix_tag[0]); /* ix?? */ 00418 put_le32(pb, avist->indexes.entry * 8 + 24); 00419 /* chunk size */ 00420 put_le16(pb, 2); /* wLongsPerEntry */ 00421 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */ 00422 put_byte(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */ 00423 put_le32(pb, avist->indexes.entry); 00424 /* nEntriesInUse */ 00425 put_tag(pb, &tag[0]); /* dwChunkId */ 00426 put_le64(pb, avi->movi_list);/* qwBaseOffset */ 00427 put_le32(pb, 0); /* dwReserved_3 (must be 0) */ 00428 00429 for (j=0; j<avist->indexes.entry; j++) { 00430 AVIIentry* ie = avi_get_ientry(&avist->indexes, j); 00431 put_le32(pb, ie->pos + 8); 00432 put_le32(pb, ((uint32_t)ie->len & ~0x80000000) | 00433 (ie->flags & 0x10 ? 0 : 0x80000000)); 00434 } 00435 put_flush_packet(pb); 00436 pos = url_ftell(pb); 00437 00438 /* Updating one entry in the AVI OpenDML master index */ 00439 url_fseek(pb, avist->indexes.indx_start - 8, SEEK_SET); 00440 put_tag(pb, "indx"); /* enabling this entry */ 00441 url_fskip(pb, 8); 00442 put_le32(pb, avi->riff_id); /* nEntriesInUse */ 00443 url_fskip(pb, 16*avi->riff_id); 00444 put_le64(pb, ix); /* qwOffset */ 00445 put_le32(pb, pos - ix); /* dwSize */ 00446 put_le32(pb, avist->indexes.entry); /* dwDuration */ 00447 00448 url_fseek(pb, pos, SEEK_SET); 00449 } 00450 return 0; 00451 } 00452 00453 static int avi_write_idx1(AVFormatContext *s) 00454 { 00455 ByteIOContext *pb = s->pb; 00456 AVIContext *avi = s->priv_data; 00457 int64_t idx_chunk; 00458 int i; 00459 char tag[5]; 00460 00461 if (!url_is_streamed(pb)) { 00462 AVIStream *avist; 00463 AVIIentry* ie = 0, *tie; 00464 int empty, stream_id = -1; 00465 00466 idx_chunk = ff_start_tag(pb, "idx1"); 00467 for(i=0; i<s->nb_streams; i++){ 00468 avist= s->streams[i]->priv_data; 00469 avist->entry=0; 00470 } 00471 00472 do { 00473 empty = 1; 00474 for (i=0; i<s->nb_streams; i++) { 00475 avist= s->streams[i]->priv_data; 00476 if (avist->indexes.entry <= avist->entry) 00477 continue; 00478 00479 tie = avi_get_ientry(&avist->indexes, avist->entry); 00480 if (empty || tie->pos < ie->pos) { 00481 ie = tie; 00482 stream_id = i; 00483 } 00484 empty = 0; 00485 } 00486 if (!empty) { 00487 avist= s->streams[stream_id]->priv_data; 00488 avi_stream2fourcc(&tag[0], stream_id, 00489 s->streams[stream_id]->codec->codec_type); 00490 put_tag(pb, &tag[0]); 00491 put_le32(pb, ie->flags); 00492 put_le32(pb, ie->pos); 00493 put_le32(pb, ie->len); 00494 avist->entry++; 00495 } 00496 } while (!empty); 00497 ff_end_tag(pb, idx_chunk); 00498 00499 avi_write_counters(s, avi->riff_id); 00500 } 00501 return 0; 00502 } 00503 00504 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) 00505 { 00506 AVIContext *avi = s->priv_data; 00507 ByteIOContext *pb = s->pb; 00508 unsigned char tag[5]; 00509 unsigned int flags=0; 00510 const int stream_index= pkt->stream_index; 00511 AVIStream *avist= s->streams[stream_index]->priv_data; 00512 AVCodecContext *enc= s->streams[stream_index]->codec; 00513 int size= pkt->size; 00514 00515 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index); 00516 while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){ 00517 AVPacket empty_packet; 00518 00519 av_init_packet(&empty_packet); 00520 empty_packet.size= 0; 00521 empty_packet.data= NULL; 00522 empty_packet.stream_index= stream_index; 00523 avi_write_packet(s, &empty_packet); 00524 // av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]); 00525 } 00526 avist->packet_count++; 00527 00528 // Make sure to put an OpenDML chunk when the file size exceeds the limits 00529 if (!url_is_streamed(pb) && 00530 (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) { 00531 00532 avi_write_ix(s); 00533 ff_end_tag(pb, avi->movi_list); 00534 00535 if (avi->riff_id == 1) 00536 avi_write_idx1(s); 00537 00538 ff_end_tag(pb, avi->riff_start); 00539 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi"); 00540 } 00541 00542 avi_stream2fourcc(&tag[0], stream_index, enc->codec_type); 00543 if(pkt->flags&AV_PKT_FLAG_KEY) 00544 flags = 0x10; 00545 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { 00546 avist->audio_strm_length += size; 00547 } 00548 00549 if (!url_is_streamed(s->pb)) { 00550 AVIIndex* idx = &avist->indexes; 00551 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE; 00552 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE; 00553 if (idx->ents_allocated <= idx->entry) { 00554 idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*)); 00555 if (!idx->cluster) 00556 return -1; 00557 idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry)); 00558 if (!idx->cluster[cl]) 00559 return -1; 00560 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE; 00561 } 00562 00563 idx->cluster[cl][id].flags = flags; 00564 idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list; 00565 idx->cluster[cl][id].len = size; 00566 idx->entry++; 00567 } 00568 00569 put_buffer(pb, tag, 4); 00570 put_le32(pb, size); 00571 put_buffer(pb, pkt->data, size); 00572 if (size & 1) 00573 put_byte(pb, 0); 00574 00575 put_flush_packet(pb); 00576 return 0; 00577 } 00578 00579 static int avi_write_trailer(AVFormatContext *s) 00580 { 00581 AVIContext *avi = s->priv_data; 00582 ByteIOContext *pb = s->pb; 00583 int res = 0; 00584 int i, j, n, nb_frames; 00585 int64_t file_size; 00586 00587 if (!url_is_streamed(pb)){ 00588 if (avi->riff_id == 1) { 00589 ff_end_tag(pb, avi->movi_list); 00590 res = avi_write_idx1(s); 00591 ff_end_tag(pb, avi->riff_start); 00592 } else { 00593 avi_write_ix(s); 00594 ff_end_tag(pb, avi->movi_list); 00595 ff_end_tag(pb, avi->riff_start); 00596 00597 file_size = url_ftell(pb); 00598 url_fseek(pb, avi->odml_list - 8, SEEK_SET); 00599 put_tag(pb, "LIST"); /* Making this AVI OpenDML one */ 00600 url_fskip(pb, 16); 00601 00602 for (n=nb_frames=0;n<s->nb_streams;n++) { 00603 AVCodecContext *stream = s->streams[n]->codec; 00604 AVIStream *avist= s->streams[n]->priv_data; 00605 00606 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) { 00607 if (nb_frames < avist->packet_count) 00608 nb_frames = avist->packet_count; 00609 } else { 00610 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) { 00611 nb_frames += avist->packet_count; 00612 } 00613 } 00614 } 00615 put_le32(pb, nb_frames); 00616 url_fseek(pb, file_size, SEEK_SET); 00617 00618 avi_write_counters(s, avi->riff_id); 00619 } 00620 } 00621 put_flush_packet(pb); 00622 00623 for (i=0; i<s->nb_streams; i++) { 00624 AVIStream *avist= s->streams[i]->priv_data; 00625 for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++) 00626 av_free(avist->indexes.cluster[j]); 00627 av_freep(&avist->indexes.cluster); 00628 avist->indexes.ents_allocated = avist->indexes.entry = 0; 00629 } 00630 00631 return res; 00632 } 00633 00634 AVOutputFormat avi_muxer = { 00635 "avi", 00636 NULL_IF_CONFIG_SMALL("AVI format"), 00637 "video/x-msvideo", 00638 "avi", 00639 sizeof(AVIContext), 00640 CODEC_ID_MP2, 00641 CODEC_ID_MPEG4, 00642 avi_write_header, 00643 avi_write_packet, 00644 avi_write_trailer, 00645 .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0}, 00646 .flags= AVFMT_VARIABLE_FPS, 00647 .metadata_conv = ff_avi_metadata_conv, 00648 };