Libav 0.7.1
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00001 /* 00002 * AVI muxer 00003 * Copyright (c) 2000 Fabrice Bellard 00004 * 00005 * This file is part of Libav. 00006 * 00007 * Libav 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 * Libav 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 Libav; 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 "avio_internal.h" 00024 #include "riff.h" 00025 #include "libavutil/intreadwrite.h" 00026 #include "libavutil/dict.h" 00027 00028 /* 00029 * TODO: 00030 * - fill all fields if non streamed (nb_frames for example) 00031 */ 00032 00033 typedef struct AVIIentry { 00034 unsigned int flags, pos, len; 00035 } AVIIentry; 00036 00037 #define AVI_INDEX_CLUSTER_SIZE 16384 00038 00039 typedef struct AVIIndex { 00040 int64_t indx_start; 00041 int entry; 00042 int ents_allocated; 00043 AVIIentry** cluster; 00044 } AVIIndex; 00045 00046 typedef struct { 00047 int64_t riff_start, movi_list, odml_list; 00048 int64_t frames_hdr_all; 00049 int riff_id; 00050 } AVIContext; 00051 00052 typedef struct { 00053 int64_t frames_hdr_strm; 00054 int audio_strm_length; 00055 int packet_count; 00056 int entry; 00057 00058 AVIIndex indexes; 00059 } AVIStream ; 00060 00061 static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id) 00062 { 00063 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE; 00064 int id = ent_id % AVI_INDEX_CLUSTER_SIZE; 00065 return &idx->cluster[cl][id]; 00066 } 00067 00068 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb, 00069 const char* riff_tag, const char* list_tag) 00070 { 00071 AVIContext *avi= s->priv_data; 00072 int64_t loff; 00073 int i; 00074 00075 avi->riff_id++; 00076 for (i=0; i<s->nb_streams; i++){ 00077 AVIStream *avist= s->streams[i]->priv_data; 00078 avist->indexes.entry = 0; 00079 } 00080 00081 avi->riff_start = ff_start_tag(pb, "RIFF"); 00082 ffio_wfourcc(pb, riff_tag); 00083 loff = ff_start_tag(pb, "LIST"); 00084 ffio_wfourcc(pb, list_tag); 00085 return loff; 00086 } 00087 00088 static char* avi_stream2fourcc(char* tag, int index, enum AVMediaType type) 00089 { 00090 tag[0] = '0' + index/10; 00091 tag[1] = '0' + index%10; 00092 if (type == AVMEDIA_TYPE_VIDEO) { 00093 tag[2] = 'd'; 00094 tag[3] = 'c'; 00095 } else if (type == AVMEDIA_TYPE_SUBTITLE) { 00096 // note: this is not an official code 00097 tag[2] = 's'; 00098 tag[3] = 'b'; 00099 } else { 00100 tag[2] = 'w'; 00101 tag[3] = 'b'; 00102 } 00103 tag[4] = '\0'; 00104 return tag; 00105 } 00106 00107 static void avi_write_info_tag(AVIOContext *pb, const char *tag, const char *str) 00108 { 00109 int len = strlen(str); 00110 if (len > 0) { 00111 len++; 00112 ffio_wfourcc(pb, tag); 00113 avio_wl32(pb, len); 00114 avio_put_str(pb, str); 00115 if (len & 1) 00116 avio_w8(pb, 0); 00117 } 00118 } 00119 00120 static int avi_write_counters(AVFormatContext* s, int riff_id) 00121 { 00122 AVIOContext *pb = s->pb; 00123 AVIContext *avi = s->priv_data; 00124 int n, au_byterate, au_ssize, au_scale, nb_frames = 0; 00125 int64_t file_size; 00126 AVCodecContext* stream; 00127 00128 file_size = avio_tell(pb); 00129 for(n = 0; n < s->nb_streams; n++) { 00130 AVIStream *avist= s->streams[n]->priv_data; 00131 00132 assert(avist->frames_hdr_strm); 00133 stream = s->streams[n]->codec; 00134 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET); 00135 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); 00136 if(au_ssize == 0) { 00137 avio_wl32(pb, avist->packet_count); 00138 } else { 00139 avio_wl32(pb, avist->audio_strm_length / au_ssize); 00140 } 00141 if(stream->codec_type == AVMEDIA_TYPE_VIDEO) 00142 nb_frames = FFMAX(nb_frames, avist->packet_count); 00143 } 00144 if(riff_id == 1) { 00145 assert(avi->frames_hdr_all); 00146 avio_seek(pb, avi->frames_hdr_all, SEEK_SET); 00147 avio_wl32(pb, nb_frames); 00148 } 00149 avio_seek(pb, file_size, SEEK_SET); 00150 00151 return 0; 00152 } 00153 00154 static int avi_write_header(AVFormatContext *s) 00155 { 00156 AVIContext *avi = s->priv_data; 00157 AVIOContext *pb = s->pb; 00158 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale; 00159 AVCodecContext *stream, *video_enc; 00160 int64_t list1, list2, strh, strf; 00161 AVDictionaryEntry *t = NULL; 00162 00163 if (s->nb_streams > AVI_MAX_STREAM_COUNT) { 00164 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n", 00165 AVI_MAX_STREAM_COUNT); 00166 return -1; 00167 } 00168 00169 for(n=0;n<s->nb_streams;n++) { 00170 s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream)); 00171 if(!s->streams[n]->priv_data) 00172 return AVERROR(ENOMEM); 00173 } 00174 00175 /* header list */ 00176 avi->riff_id = 0; 00177 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl"); 00178 00179 /* avi header */ 00180 ffio_wfourcc(pb, "avih"); 00181 avio_wl32(pb, 14 * 4); 00182 bitrate = 0; 00183 00184 video_enc = NULL; 00185 for(n=0;n<s->nb_streams;n++) { 00186 stream = s->streams[n]->codec; 00187 bitrate += stream->bit_rate; 00188 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) 00189 video_enc = stream; 00190 } 00191 00192 nb_frames = 0; 00193 00194 if(video_enc){ 00195 avio_wl32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den)); 00196 } else { 00197 avio_wl32(pb, 0); 00198 } 00199 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */ 00200 avio_wl32(pb, 0); /* padding */ 00201 if (!pb->seekable) 00202 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */ 00203 else 00204 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */ 00205 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */ 00206 avio_wl32(pb, nb_frames); /* nb frames, filled later */ 00207 avio_wl32(pb, 0); /* initial frame */ 00208 avio_wl32(pb, s->nb_streams); /* nb streams */ 00209 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */ 00210 if(video_enc){ 00211 avio_wl32(pb, video_enc->width); 00212 avio_wl32(pb, video_enc->height); 00213 } else { 00214 avio_wl32(pb, 0); 00215 avio_wl32(pb, 0); 00216 } 00217 avio_wl32(pb, 0); /* reserved */ 00218 avio_wl32(pb, 0); /* reserved */ 00219 avio_wl32(pb, 0); /* reserved */ 00220 avio_wl32(pb, 0); /* reserved */ 00221 00222 /* stream list */ 00223 for(i=0;i<n;i++) { 00224 AVIStream *avist= s->streams[i]->priv_data; 00225 list2 = ff_start_tag(pb, "LIST"); 00226 ffio_wfourcc(pb, "strl"); 00227 00228 stream = s->streams[i]->codec; 00229 00230 /* stream generic header */ 00231 strh = ff_start_tag(pb, "strh"); 00232 switch(stream->codec_type) { 00233 case AVMEDIA_TYPE_SUBTITLE: 00234 // XSUB subtitles behave like video tracks, other subtitles 00235 // are not (yet) supported. 00236 if (stream->codec_id != CODEC_ID_XSUB) { 00237 av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n"); 00238 return AVERROR_PATCHWELCOME; 00239 } 00240 case AVMEDIA_TYPE_VIDEO: ffio_wfourcc(pb, "vids"); break; 00241 case AVMEDIA_TYPE_AUDIO: ffio_wfourcc(pb, "auds"); break; 00242 // case AVMEDIA_TYPE_TEXT : ffio_wfourcc(pb, "txts"); break; 00243 case AVMEDIA_TYPE_DATA : ffio_wfourcc(pb, "dats"); break; 00244 } 00245 if(stream->codec_type == AVMEDIA_TYPE_VIDEO || 00246 stream->codec_id == CODEC_ID_XSUB) 00247 avio_wl32(pb, stream->codec_tag); 00248 else 00249 avio_wl32(pb, 1); 00250 avio_wl32(pb, 0); /* flags */ 00251 avio_wl16(pb, 0); /* priority */ 00252 avio_wl16(pb, 0); /* language */ 00253 avio_wl32(pb, 0); /* initial frame */ 00254 00255 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); 00256 00257 avio_wl32(pb, au_scale); /* scale */ 00258 avio_wl32(pb, au_byterate); /* rate */ 00259 av_set_pts_info(s->streams[i], 64, au_scale, au_byterate); 00260 00261 avio_wl32(pb, 0); /* start */ 00262 avist->frames_hdr_strm = avio_tell(pb); /* remember this offset to fill later */ 00263 if (!pb->seekable) 00264 avio_wl32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */ 00265 else 00266 avio_wl32(pb, 0); /* length, XXX: filled later */ 00267 00268 /* suggested buffer size */ //FIXME set at the end to largest chunk 00269 if(stream->codec_type == AVMEDIA_TYPE_VIDEO) 00270 avio_wl32(pb, 1024 * 1024); 00271 else if(stream->codec_type == AVMEDIA_TYPE_AUDIO) 00272 avio_wl32(pb, 12 * 1024); 00273 else 00274 avio_wl32(pb, 0); 00275 avio_wl32(pb, -1); /* quality */ 00276 avio_wl32(pb, au_ssize); /* sample size */ 00277 avio_wl32(pb, 0); 00278 avio_wl16(pb, stream->width); 00279 avio_wl16(pb, stream->height); 00280 ff_end_tag(pb, strh); 00281 00282 if(stream->codec_type != AVMEDIA_TYPE_DATA){ 00283 strf = ff_start_tag(pb, "strf"); 00284 switch(stream->codec_type) { 00285 case AVMEDIA_TYPE_SUBTITLE: 00286 // XSUB subtitles behave like video tracks, other subtitles 00287 // are not (yet) supported. 00288 if (stream->codec_id != CODEC_ID_XSUB) break; 00289 case AVMEDIA_TYPE_VIDEO: 00290 ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0); 00291 break; 00292 case AVMEDIA_TYPE_AUDIO: 00293 if (ff_put_wav_header(pb, stream) < 0) { 00294 return -1; 00295 } 00296 break; 00297 default: 00298 return -1; 00299 } 00300 ff_end_tag(pb, strf); 00301 if ((t = av_dict_get(s->streams[i]->metadata, "title", NULL, 0))) { 00302 avi_write_info_tag(s->pb, "strn", t->value); 00303 t = NULL; 00304 } 00305 } 00306 00307 if (pb->seekable) { 00308 unsigned char tag[5]; 00309 int j; 00310 00311 /* Starting to lay out AVI OpenDML master index. 00312 * We want to make it JUNK entry for now, since we'd 00313 * like to get away without making AVI an OpenDML one 00314 * for compatibility reasons. 00315 */ 00316 avist->indexes.entry = avist->indexes.ents_allocated = 0; 00317 avist->indexes.indx_start = ff_start_tag(pb, "JUNK"); 00318 avio_wl16(pb, 4); /* wLongsPerEntry */ 00319 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ 00320 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */ 00321 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */ 00322 ffio_wfourcc(pb, avi_stream2fourcc(tag, i, stream->codec_type)); 00323 /* dwChunkId */ 00324 avio_wl64(pb, 0); /* dwReserved[3] 00325 avio_wl32(pb, 0); Must be 0. */ 00326 for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++) 00327 avio_wl64(pb, 0); 00328 ff_end_tag(pb, avist->indexes.indx_start); 00329 } 00330 00331 if( stream->codec_type == AVMEDIA_TYPE_VIDEO 00332 && s->streams[i]->sample_aspect_ratio.num>0 00333 && s->streams[i]->sample_aspect_ratio.den>0){ 00334 int vprp= ff_start_tag(pb, "vprp"); 00335 AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio, 00336 (AVRational){stream->width, stream->height}); 00337 int num, den; 00338 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF); 00339 00340 avio_wl32(pb, 0); //video format = unknown 00341 avio_wl32(pb, 0); //video standard= unknown 00342 avio_wl32(pb, lrintf(1.0/av_q2d(stream->time_base))); 00343 avio_wl32(pb, stream->width ); 00344 avio_wl32(pb, stream->height); 00345 avio_wl16(pb, den); 00346 avio_wl16(pb, num); 00347 avio_wl32(pb, stream->width ); 00348 avio_wl32(pb, stream->height); 00349 avio_wl32(pb, 1); //progressive FIXME 00350 00351 avio_wl32(pb, stream->height); 00352 avio_wl32(pb, stream->width ); 00353 avio_wl32(pb, stream->height); 00354 avio_wl32(pb, stream->width ); 00355 avio_wl32(pb, 0); 00356 avio_wl32(pb, 0); 00357 00358 avio_wl32(pb, 0); 00359 avio_wl32(pb, 0); 00360 ff_end_tag(pb, vprp); 00361 } 00362 00363 ff_end_tag(pb, list2); 00364 } 00365 00366 if (pb->seekable) { 00367 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */ 00368 avi->odml_list = ff_start_tag(pb, "JUNK"); 00369 ffio_wfourcc(pb, "odml"); 00370 ffio_wfourcc(pb, "dmlh"); 00371 avio_wl32(pb, 248); 00372 for (i = 0; i < 248; i+= 4) 00373 avio_wl32(pb, 0); 00374 ff_end_tag(pb, avi->odml_list); 00375 } 00376 00377 ff_end_tag(pb, list1); 00378 00379 list2 = ff_start_tag(pb, "LIST"); 00380 ffio_wfourcc(pb, "INFO"); 00381 ff_metadata_conv(&s->metadata, ff_avi_metadata_conv, NULL); 00382 for (i = 0; *ff_avi_tags[i]; i++) { 00383 if ((t = av_dict_get(s->metadata, ff_avi_tags[i], NULL, AV_DICT_MATCH_CASE))) 00384 avi_write_info_tag(s->pb, t->key, t->value); 00385 } 00386 ff_end_tag(pb, list2); 00387 00388 /* some padding for easier tag editing */ 00389 list2 = ff_start_tag(pb, "JUNK"); 00390 for (i = 0; i < 1016; i += 4) 00391 avio_wl32(pb, 0); 00392 ff_end_tag(pb, list2); 00393 00394 avi->movi_list = ff_start_tag(pb, "LIST"); 00395 ffio_wfourcc(pb, "movi"); 00396 00397 avio_flush(pb); 00398 00399 return 0; 00400 } 00401 00402 static int avi_write_ix(AVFormatContext *s) 00403 { 00404 AVIOContext *pb = s->pb; 00405 AVIContext *avi = s->priv_data; 00406 char tag[5]; 00407 char ix_tag[] = "ix00"; 00408 int i, j; 00409 00410 assert(pb->seekable); 00411 00412 if (avi->riff_id > AVI_MASTER_INDEX_SIZE) 00413 return -1; 00414 00415 for (i=0;i<s->nb_streams;i++) { 00416 AVIStream *avist= s->streams[i]->priv_data; 00417 int64_t ix, pos; 00418 00419 avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type); 00420 ix_tag[3] = '0' + i; 00421 00422 /* Writing AVI OpenDML leaf index chunk */ 00423 ix = avio_tell(pb); 00424 ffio_wfourcc(pb, ix_tag); /* ix?? */ 00425 avio_wl32(pb, avist->indexes.entry * 8 + 24); 00426 /* chunk size */ 00427 avio_wl16(pb, 2); /* wLongsPerEntry */ 00428 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ 00429 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */ 00430 avio_wl32(pb, avist->indexes.entry); 00431 /* nEntriesInUse */ 00432 ffio_wfourcc(pb, tag); /* dwChunkId */ 00433 avio_wl64(pb, avi->movi_list);/* qwBaseOffset */ 00434 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */ 00435 00436 for (j=0; j<avist->indexes.entry; j++) { 00437 AVIIentry* ie = avi_get_ientry(&avist->indexes, j); 00438 avio_wl32(pb, ie->pos + 8); 00439 avio_wl32(pb, ((uint32_t)ie->len & ~0x80000000) | 00440 (ie->flags & 0x10 ? 0 : 0x80000000)); 00441 } 00442 avio_flush(pb); 00443 pos = avio_tell(pb); 00444 00445 /* Updating one entry in the AVI OpenDML master index */ 00446 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET); 00447 ffio_wfourcc(pb, "indx"); /* enabling this entry */ 00448 avio_skip(pb, 8); 00449 avio_wl32(pb, avi->riff_id); /* nEntriesInUse */ 00450 avio_skip(pb, 16*avi->riff_id); 00451 avio_wl64(pb, ix); /* qwOffset */ 00452 avio_wl32(pb, pos - ix); /* dwSize */ 00453 avio_wl32(pb, avist->indexes.entry); /* dwDuration */ 00454 00455 avio_seek(pb, pos, SEEK_SET); 00456 } 00457 return 0; 00458 } 00459 00460 static int avi_write_idx1(AVFormatContext *s) 00461 { 00462 AVIOContext *pb = s->pb; 00463 AVIContext *avi = s->priv_data; 00464 int64_t idx_chunk; 00465 int i; 00466 char tag[5]; 00467 00468 if (pb->seekable) { 00469 AVIStream *avist; 00470 AVIIentry* ie = 0, *tie; 00471 int empty, stream_id = -1; 00472 00473 idx_chunk = ff_start_tag(pb, "idx1"); 00474 for(i=0; i<s->nb_streams; i++){ 00475 avist= s->streams[i]->priv_data; 00476 avist->entry=0; 00477 } 00478 00479 do { 00480 empty = 1; 00481 for (i=0; i<s->nb_streams; i++) { 00482 avist= s->streams[i]->priv_data; 00483 if (avist->indexes.entry <= avist->entry) 00484 continue; 00485 00486 tie = avi_get_ientry(&avist->indexes, avist->entry); 00487 if (empty || tie->pos < ie->pos) { 00488 ie = tie; 00489 stream_id = i; 00490 } 00491 empty = 0; 00492 } 00493 if (!empty) { 00494 avist= s->streams[stream_id]->priv_data; 00495 avi_stream2fourcc(tag, stream_id, 00496 s->streams[stream_id]->codec->codec_type); 00497 ffio_wfourcc(pb, tag); 00498 avio_wl32(pb, ie->flags); 00499 avio_wl32(pb, ie->pos); 00500 avio_wl32(pb, ie->len); 00501 avist->entry++; 00502 } 00503 } while (!empty); 00504 ff_end_tag(pb, idx_chunk); 00505 00506 avi_write_counters(s, avi->riff_id); 00507 } 00508 return 0; 00509 } 00510 00511 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) 00512 { 00513 AVIContext *avi = s->priv_data; 00514 AVIOContext *pb = s->pb; 00515 unsigned char tag[5]; 00516 unsigned int flags=0; 00517 const int stream_index= pkt->stream_index; 00518 AVIStream *avist= s->streams[stream_index]->priv_data; 00519 AVCodecContext *enc= s->streams[stream_index]->codec; 00520 int size= pkt->size; 00521 00522 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index); 00523 while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){ 00524 AVPacket empty_packet; 00525 00526 av_init_packet(&empty_packet); 00527 empty_packet.size= 0; 00528 empty_packet.data= NULL; 00529 empty_packet.stream_index= stream_index; 00530 avi_write_packet(s, &empty_packet); 00531 // av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]); 00532 } 00533 avist->packet_count++; 00534 00535 // Make sure to put an OpenDML chunk when the file size exceeds the limits 00536 if (pb->seekable && 00537 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) { 00538 00539 avi_write_ix(s); 00540 ff_end_tag(pb, avi->movi_list); 00541 00542 if (avi->riff_id == 1) 00543 avi_write_idx1(s); 00544 00545 ff_end_tag(pb, avi->riff_start); 00546 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi"); 00547 } 00548 00549 avi_stream2fourcc(tag, stream_index, enc->codec_type); 00550 if(pkt->flags&AV_PKT_FLAG_KEY) 00551 flags = 0x10; 00552 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { 00553 avist->audio_strm_length += size; 00554 } 00555 00556 if (s->pb->seekable) { 00557 AVIIndex* idx = &avist->indexes; 00558 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE; 00559 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE; 00560 if (idx->ents_allocated <= idx->entry) { 00561 idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*)); 00562 if (!idx->cluster) 00563 return -1; 00564 idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry)); 00565 if (!idx->cluster[cl]) 00566 return -1; 00567 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE; 00568 } 00569 00570 idx->cluster[cl][id].flags = flags; 00571 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list; 00572 idx->cluster[cl][id].len = size; 00573 idx->entry++; 00574 } 00575 00576 avio_write(pb, tag, 4); 00577 avio_wl32(pb, size); 00578 avio_write(pb, pkt->data, size); 00579 if (size & 1) 00580 avio_w8(pb, 0); 00581 00582 avio_flush(pb); 00583 return 0; 00584 } 00585 00586 static int avi_write_trailer(AVFormatContext *s) 00587 { 00588 AVIContext *avi = s->priv_data; 00589 AVIOContext *pb = s->pb; 00590 int res = 0; 00591 int i, j, n, nb_frames; 00592 int64_t file_size; 00593 00594 if (pb->seekable){ 00595 if (avi->riff_id == 1) { 00596 ff_end_tag(pb, avi->movi_list); 00597 res = avi_write_idx1(s); 00598 ff_end_tag(pb, avi->riff_start); 00599 } else { 00600 avi_write_ix(s); 00601 ff_end_tag(pb, avi->movi_list); 00602 ff_end_tag(pb, avi->riff_start); 00603 00604 file_size = avio_tell(pb); 00605 avio_seek(pb, avi->odml_list - 8, SEEK_SET); 00606 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */ 00607 avio_skip(pb, 16); 00608 00609 for (n=nb_frames=0;n<s->nb_streams;n++) { 00610 AVCodecContext *stream = s->streams[n]->codec; 00611 AVIStream *avist= s->streams[n]->priv_data; 00612 00613 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) { 00614 if (nb_frames < avist->packet_count) 00615 nb_frames = avist->packet_count; 00616 } else { 00617 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) { 00618 nb_frames += avist->packet_count; 00619 } 00620 } 00621 } 00622 avio_wl32(pb, nb_frames); 00623 avio_seek(pb, file_size, SEEK_SET); 00624 00625 avi_write_counters(s, avi->riff_id); 00626 } 00627 } 00628 avio_flush(pb); 00629 00630 for (i=0; i<s->nb_streams; i++) { 00631 AVIStream *avist= s->streams[i]->priv_data; 00632 for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++) 00633 av_free(avist->indexes.cluster[j]); 00634 av_freep(&avist->indexes.cluster); 00635 avist->indexes.ents_allocated = avist->indexes.entry = 0; 00636 } 00637 00638 return res; 00639 } 00640 00641 AVOutputFormat ff_avi_muxer = { 00642 "avi", 00643 NULL_IF_CONFIG_SMALL("AVI format"), 00644 "video/x-msvideo", 00645 "avi", 00646 sizeof(AVIContext), 00647 CODEC_ID_MP2, 00648 CODEC_ID_MPEG4, 00649 avi_write_header, 00650 avi_write_packet, 00651 avi_write_trailer, 00652 .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0}, 00653 .flags= AVFMT_VARIABLE_FPS, 00654 };