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 "internal.h" 00023 #include "avi.h" 00024 #include "avio_internal.h" 00025 #include "riff.h" 00026 #include "libavutil/intreadwrite.h" 00027 #include "libavutil/dict.h" 00028 00029 /* 00030 * TODO: 00031 * - fill all fields if non streamed (nb_frames for example) 00032 */ 00033 00034 typedef struct AVIIentry { 00035 unsigned int flags, pos, len; 00036 } AVIIentry; 00037 00038 #define AVI_INDEX_CLUSTER_SIZE 16384 00039 00040 typedef struct AVIIndex { 00041 int64_t indx_start; 00042 int entry; 00043 int ents_allocated; 00044 AVIIentry** cluster; 00045 } AVIIndex; 00046 00047 typedef struct { 00048 int64_t riff_start, movi_list, odml_list; 00049 int64_t frames_hdr_all; 00050 int riff_id; 00051 } AVIContext; 00052 00053 typedef struct { 00054 int64_t frames_hdr_strm; 00055 int audio_strm_length; 00056 int packet_count; 00057 int entry; 00058 00059 AVIIndex indexes; 00060 } AVIStream ; 00061 00062 static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id) 00063 { 00064 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE; 00065 int id = ent_id % AVI_INDEX_CLUSTER_SIZE; 00066 return &idx->cluster[cl][id]; 00067 } 00068 00069 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb, 00070 const char* riff_tag, const char* list_tag) 00071 { 00072 AVIContext *avi= s->priv_data; 00073 int64_t loff; 00074 int i; 00075 00076 avi->riff_id++; 00077 for (i=0; i<s->nb_streams; i++){ 00078 AVIStream *avist= s->streams[i]->priv_data; 00079 avist->indexes.entry = 0; 00080 } 00081 00082 avi->riff_start = ff_start_tag(pb, "RIFF"); 00083 ffio_wfourcc(pb, riff_tag); 00084 loff = ff_start_tag(pb, "LIST"); 00085 ffio_wfourcc(pb, list_tag); 00086 return loff; 00087 } 00088 00089 static char* avi_stream2fourcc(char* tag, int index, enum AVMediaType type) 00090 { 00091 tag[0] = '0' + index/10; 00092 tag[1] = '0' + index%10; 00093 if (type == AVMEDIA_TYPE_VIDEO) { 00094 tag[2] = 'd'; 00095 tag[3] = 'c'; 00096 } else if (type == AVMEDIA_TYPE_SUBTITLE) { 00097 // note: this is not an official code 00098 tag[2] = 's'; 00099 tag[3] = 'b'; 00100 } else { 00101 tag[2] = 'w'; 00102 tag[3] = 'b'; 00103 } 00104 tag[4] = '0円'; 00105 return tag; 00106 } 00107 00108 static void avi_write_info_tag(AVIOContext *pb, const char *tag, const char *str) 00109 { 00110 int len = strlen(str); 00111 if (len > 0) { 00112 len++; 00113 ffio_wfourcc(pb, tag); 00114 avio_wl32(pb, len); 00115 avio_put_str(pb, str); 00116 if (len & 1) 00117 avio_w8(pb, 0); 00118 } 00119 } 00120 00121 static int avi_write_counters(AVFormatContext* s, int riff_id) 00122 { 00123 AVIOContext *pb = s->pb; 00124 AVIContext *avi = s->priv_data; 00125 int n, au_byterate, au_ssize, au_scale, nb_frames = 0; 00126 int64_t file_size; 00127 AVCodecContext* stream; 00128 00129 file_size = avio_tell(pb); 00130 for(n = 0; n < s->nb_streams; n++) { 00131 AVIStream *avist= s->streams[n]->priv_data; 00132 00133 assert(avist->frames_hdr_strm); 00134 stream = s->streams[n]->codec; 00135 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET); 00136 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); 00137 if(au_ssize == 0) { 00138 avio_wl32(pb, avist->packet_count); 00139 } else { 00140 avio_wl32(pb, avist->audio_strm_length / au_ssize); 00141 } 00142 if(stream->codec_type == AVMEDIA_TYPE_VIDEO) 00143 nb_frames = FFMAX(nb_frames, avist->packet_count); 00144 } 00145 if(riff_id == 1) { 00146 assert(avi->frames_hdr_all); 00147 avio_seek(pb, avi->frames_hdr_all, SEEK_SET); 00148 avio_wl32(pb, nb_frames); 00149 } 00150 avio_seek(pb, file_size, SEEK_SET); 00151 00152 return 0; 00153 } 00154 00155 static int avi_write_header(AVFormatContext *s) 00156 { 00157 AVIContext *avi = s->priv_data; 00158 AVIOContext *pb = s->pb; 00159 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale; 00160 AVCodecContext *stream, *video_enc; 00161 int64_t list1, list2, strh, strf; 00162 AVDictionaryEntry *t = NULL; 00163 00164 if (s->nb_streams > AVI_MAX_STREAM_COUNT) { 00165 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n", 00166 AVI_MAX_STREAM_COUNT); 00167 return -1; 00168 } 00169 00170 for(n=0;n<s->nb_streams;n++) { 00171 s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream)); 00172 if(!s->streams[n]->priv_data) 00173 return AVERROR(ENOMEM); 00174 } 00175 00176 /* header list */ 00177 avi->riff_id = 0; 00178 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl"); 00179 00180 /* avi header */ 00181 ffio_wfourcc(pb, "avih"); 00182 avio_wl32(pb, 14 * 4); 00183 bitrate = 0; 00184 00185 video_enc = NULL; 00186 for(n=0;n<s->nb_streams;n++) { 00187 stream = s->streams[n]->codec; 00188 bitrate += stream->bit_rate; 00189 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) 00190 video_enc = stream; 00191 } 00192 00193 nb_frames = 0; 00194 00195 if(video_enc){ 00196 avio_wl32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den)); 00197 } else { 00198 avio_wl32(pb, 0); 00199 } 00200 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */ 00201 avio_wl32(pb, 0); /* padding */ 00202 if (!pb->seekable) 00203 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */ 00204 else 00205 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */ 00206 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */ 00207 avio_wl32(pb, nb_frames); /* nb frames, filled later */ 00208 avio_wl32(pb, 0); /* initial frame */ 00209 avio_wl32(pb, s->nb_streams); /* nb streams */ 00210 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */ 00211 if(video_enc){ 00212 avio_wl32(pb, video_enc->width); 00213 avio_wl32(pb, video_enc->height); 00214 } else { 00215 avio_wl32(pb, 0); 00216 avio_wl32(pb, 0); 00217 } 00218 avio_wl32(pb, 0); /* reserved */ 00219 avio_wl32(pb, 0); /* reserved */ 00220 avio_wl32(pb, 0); /* reserved */ 00221 avio_wl32(pb, 0); /* reserved */ 00222 00223 /* stream list */ 00224 for(i=0;i<n;i++) { 00225 AVIStream *avist= s->streams[i]->priv_data; 00226 list2 = ff_start_tag(pb, "LIST"); 00227 ffio_wfourcc(pb, "strl"); 00228 00229 stream = s->streams[i]->codec; 00230 00231 /* stream generic header */ 00232 strh = ff_start_tag(pb, "strh"); 00233 switch(stream->codec_type) { 00234 case AVMEDIA_TYPE_SUBTITLE: 00235 // XSUB subtitles behave like video tracks, other subtitles 00236 // are not (yet) supported. 00237 if (stream->codec_id != CODEC_ID_XSUB) { 00238 av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n"); 00239 return AVERROR_PATCHWELCOME; 00240 } 00241 case AVMEDIA_TYPE_VIDEO: ffio_wfourcc(pb, "vids"); break; 00242 case AVMEDIA_TYPE_AUDIO: ffio_wfourcc(pb, "auds"); break; 00243 // case AVMEDIA_TYPE_TEXT : ffio_wfourcc(pb, "txts"); break; 00244 case AVMEDIA_TYPE_DATA : ffio_wfourcc(pb, "dats"); break; 00245 } 00246 if(stream->codec_type == AVMEDIA_TYPE_VIDEO || 00247 stream->codec_id == CODEC_ID_XSUB) 00248 avio_wl32(pb, stream->codec_tag); 00249 else 00250 avio_wl32(pb, 1); 00251 avio_wl32(pb, 0); /* flags */ 00252 avio_wl16(pb, 0); /* priority */ 00253 avio_wl16(pb, 0); /* language */ 00254 avio_wl32(pb, 0); /* initial frame */ 00255 00256 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale); 00257 00258 avio_wl32(pb, au_scale); /* scale */ 00259 avio_wl32(pb, au_byterate); /* rate */ 00260 avpriv_set_pts_info(s->streams[i], 64, au_scale, au_byterate); 00261 00262 avio_wl32(pb, 0); /* start */ 00263 avist->frames_hdr_strm = avio_tell(pb); /* remember this offset to fill later */ 00264 if (!pb->seekable) 00265 avio_wl32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */ 00266 else 00267 avio_wl32(pb, 0); /* length, XXX: filled later */ 00268 00269 /* suggested buffer size */ //FIXME set at the end to largest chunk 00270 if(stream->codec_type == AVMEDIA_TYPE_VIDEO) 00271 avio_wl32(pb, 1024 * 1024); 00272 else if(stream->codec_type == AVMEDIA_TYPE_AUDIO) 00273 avio_wl32(pb, 12 * 1024); 00274 else 00275 avio_wl32(pb, 0); 00276 avio_wl32(pb, -1); /* quality */ 00277 avio_wl32(pb, au_ssize); /* sample size */ 00278 avio_wl32(pb, 0); 00279 avio_wl16(pb, stream->width); 00280 avio_wl16(pb, stream->height); 00281 ff_end_tag(pb, strh); 00282 00283 if(stream->codec_type != AVMEDIA_TYPE_DATA){ 00284 strf = ff_start_tag(pb, "strf"); 00285 switch(stream->codec_type) { 00286 case AVMEDIA_TYPE_SUBTITLE: 00287 // XSUB subtitles behave like video tracks, other subtitles 00288 // are not (yet) supported. 00289 if (stream->codec_id != CODEC_ID_XSUB) break; 00290 case AVMEDIA_TYPE_VIDEO: 00291 ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0); 00292 break; 00293 case AVMEDIA_TYPE_AUDIO: 00294 if (ff_put_wav_header(pb, stream) < 0) { 00295 return -1; 00296 } 00297 break; 00298 default: 00299 return -1; 00300 } 00301 ff_end_tag(pb, strf); 00302 if ((t = av_dict_get(s->streams[i]->metadata, "title", NULL, 0))) { 00303 avi_write_info_tag(s->pb, "strn", t->value); 00304 t = NULL; 00305 } 00306 } 00307 00308 if (pb->seekable) { 00309 unsigned char tag[5]; 00310 int j; 00311 00312 /* Starting to lay out AVI OpenDML master index. 00313 * We want to make it JUNK entry for now, since we'd 00314 * like to get away without making AVI an OpenDML one 00315 * for compatibility reasons. 00316 */ 00317 avist->indexes.entry = avist->indexes.ents_allocated = 0; 00318 avist->indexes.indx_start = ff_start_tag(pb, "JUNK"); 00319 avio_wl16(pb, 4); /* wLongsPerEntry */ 00320 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ 00321 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */ 00322 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */ 00323 ffio_wfourcc(pb, avi_stream2fourcc(tag, i, stream->codec_type)); 00324 /* dwChunkId */ 00325 avio_wl64(pb, 0); /* dwReserved[3] 00326 avio_wl32(pb, 0); Must be 0. */ 00327 for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++) 00328 avio_wl64(pb, 0); 00329 ff_end_tag(pb, avist->indexes.indx_start); 00330 } 00331 00332 if( stream->codec_type == AVMEDIA_TYPE_VIDEO 00333 && s->streams[i]->sample_aspect_ratio.num>0 00334 && s->streams[i]->sample_aspect_ratio.den>0){ 00335 int vprp= ff_start_tag(pb, "vprp"); 00336 AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio, 00337 (AVRational){stream->width, stream->height}); 00338 int num, den; 00339 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF); 00340 00341 avio_wl32(pb, 0); //video format = unknown 00342 avio_wl32(pb, 0); //video standard= unknown 00343 avio_wl32(pb, lrintf(1.0/av_q2d(stream->time_base))); 00344 avio_wl32(pb, stream->width ); 00345 avio_wl32(pb, stream->height); 00346 avio_wl16(pb, den); 00347 avio_wl16(pb, num); 00348 avio_wl32(pb, stream->width ); 00349 avio_wl32(pb, stream->height); 00350 avio_wl32(pb, 1); //progressive FIXME 00351 00352 avio_wl32(pb, stream->height); 00353 avio_wl32(pb, stream->width ); 00354 avio_wl32(pb, stream->height); 00355 avio_wl32(pb, stream->width ); 00356 avio_wl32(pb, 0); 00357 avio_wl32(pb, 0); 00358 00359 avio_wl32(pb, 0); 00360 avio_wl32(pb, 0); 00361 ff_end_tag(pb, vprp); 00362 } 00363 00364 ff_end_tag(pb, list2); 00365 } 00366 00367 if (pb->seekable) { 00368 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */ 00369 avi->odml_list = ff_start_tag(pb, "JUNK"); 00370 ffio_wfourcc(pb, "odml"); 00371 ffio_wfourcc(pb, "dmlh"); 00372 avio_wl32(pb, 248); 00373 for (i = 0; i < 248; i+= 4) 00374 avio_wl32(pb, 0); 00375 ff_end_tag(pb, avi->odml_list); 00376 } 00377 00378 ff_end_tag(pb, list1); 00379 00380 list2 = ff_start_tag(pb, "LIST"); 00381 ffio_wfourcc(pb, "INFO"); 00382 ff_metadata_conv(&s->metadata, ff_riff_info_conv, NULL); 00383 for (i = 0; *ff_riff_tags[i]; i++) { 00384 if ((t = av_dict_get(s->metadata, ff_riff_tags[i], NULL, AV_DICT_MATCH_CASE))) 00385 avi_write_info_tag(s->pb, t->key, t->value); 00386 } 00387 ff_end_tag(pb, list2); 00388 00389 /* some padding for easier tag editing */ 00390 list2 = ff_start_tag(pb, "JUNK"); 00391 for (i = 0; i < 1016; i += 4) 00392 avio_wl32(pb, 0); 00393 ff_end_tag(pb, list2); 00394 00395 avi->movi_list = ff_start_tag(pb, "LIST"); 00396 ffio_wfourcc(pb, "movi"); 00397 00398 avio_flush(pb); 00399 00400 return 0; 00401 } 00402 00403 static int avi_write_ix(AVFormatContext *s) 00404 { 00405 AVIOContext *pb = s->pb; 00406 AVIContext *avi = s->priv_data; 00407 char tag[5]; 00408 char ix_tag[] = "ix00"; 00409 int i, j; 00410 00411 assert(pb->seekable); 00412 00413 if (avi->riff_id > AVI_MASTER_INDEX_SIZE) 00414 return -1; 00415 00416 for (i=0;i<s->nb_streams;i++) { 00417 AVIStream *avist= s->streams[i]->priv_data; 00418 int64_t ix, pos; 00419 00420 avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type); 00421 ix_tag[3] = '0' + i; 00422 00423 /* Writing AVI OpenDML leaf index chunk */ 00424 ix = avio_tell(pb); 00425 ffio_wfourcc(pb, ix_tag); /* ix?? */ 00426 avio_wl32(pb, avist->indexes.entry * 8 + 24); 00427 /* chunk size */ 00428 avio_wl16(pb, 2); /* wLongsPerEntry */ 00429 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */ 00430 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */ 00431 avio_wl32(pb, avist->indexes.entry); 00432 /* nEntriesInUse */ 00433 ffio_wfourcc(pb, tag); /* dwChunkId */ 00434 avio_wl64(pb, avi->movi_list);/* qwBaseOffset */ 00435 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */ 00436 00437 for (j=0; j<avist->indexes.entry; j++) { 00438 AVIIentry* ie = avi_get_ientry(&avist->indexes, j); 00439 avio_wl32(pb, ie->pos + 8); 00440 avio_wl32(pb, ((uint32_t)ie->len & ~0x80000000) | 00441 (ie->flags & 0x10 ? 0 : 0x80000000)); 00442 } 00443 avio_flush(pb); 00444 pos = avio_tell(pb); 00445 00446 /* Updating one entry in the AVI OpenDML master index */ 00447 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET); 00448 ffio_wfourcc(pb, "indx"); /* enabling this entry */ 00449 avio_skip(pb, 8); 00450 avio_wl32(pb, avi->riff_id); /* nEntriesInUse */ 00451 avio_skip(pb, 16*avi->riff_id); 00452 avio_wl64(pb, ix); /* qwOffset */ 00453 avio_wl32(pb, pos - ix); /* dwSize */ 00454 avio_wl32(pb, avist->indexes.entry); /* dwDuration */ 00455 00456 avio_seek(pb, pos, SEEK_SET); 00457 } 00458 return 0; 00459 } 00460 00461 static int avi_write_idx1(AVFormatContext *s) 00462 { 00463 AVIOContext *pb = s->pb; 00464 AVIContext *avi = s->priv_data; 00465 int64_t idx_chunk; 00466 int i; 00467 char tag[5]; 00468 00469 if (pb->seekable) { 00470 AVIStream *avist; 00471 AVIIentry* ie = 0, *tie; 00472 int empty, stream_id = -1; 00473 00474 idx_chunk = ff_start_tag(pb, "idx1"); 00475 for(i=0; i<s->nb_streams; i++){ 00476 avist= s->streams[i]->priv_data; 00477 avist->entry=0; 00478 } 00479 00480 do { 00481 empty = 1; 00482 for (i=0; i<s->nb_streams; i++) { 00483 avist= s->streams[i]->priv_data; 00484 if (avist->indexes.entry <= avist->entry) 00485 continue; 00486 00487 tie = avi_get_ientry(&avist->indexes, avist->entry); 00488 if (empty || tie->pos < ie->pos) { 00489 ie = tie; 00490 stream_id = i; 00491 } 00492 empty = 0; 00493 } 00494 if (!empty) { 00495 avist= s->streams[stream_id]->priv_data; 00496 avi_stream2fourcc(tag, stream_id, 00497 s->streams[stream_id]->codec->codec_type); 00498 ffio_wfourcc(pb, tag); 00499 avio_wl32(pb, ie->flags); 00500 avio_wl32(pb, ie->pos); 00501 avio_wl32(pb, ie->len); 00502 avist->entry++; 00503 } 00504 } while (!empty); 00505 ff_end_tag(pb, idx_chunk); 00506 00507 avi_write_counters(s, avi->riff_id); 00508 } 00509 return 0; 00510 } 00511 00512 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt) 00513 { 00514 AVIContext *avi = s->priv_data; 00515 AVIOContext *pb = s->pb; 00516 unsigned char tag[5]; 00517 unsigned int flags=0; 00518 const int stream_index= pkt->stream_index; 00519 AVIStream *avist= s->streams[stream_index]->priv_data; 00520 AVCodecContext *enc= s->streams[stream_index]->codec; 00521 int size= pkt->size; 00522 00523 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avist->packet_count, stream_index); 00524 while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){ 00525 AVPacket empty_packet; 00526 00527 if(pkt->dts - avist->packet_count > 60000){ 00528 av_log(s, AV_LOG_ERROR, "Too large number of skiped frames %"PRId64"\n", pkt->dts - avist->packet_count); 00529 return AVERROR(EINVAL); 00530 } 00531 00532 av_init_packet(&empty_packet); 00533 empty_packet.size= 0; 00534 empty_packet.data= NULL; 00535 empty_packet.stream_index= stream_index; 00536 avi_write_packet(s, &empty_packet); 00537 // av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avist->packet_count); 00538 } 00539 avist->packet_count++; 00540 00541 // Make sure to put an OpenDML chunk when the file size exceeds the limits 00542 if (pb->seekable && 00543 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) { 00544 00545 avi_write_ix(s); 00546 ff_end_tag(pb, avi->movi_list); 00547 00548 if (avi->riff_id == 1) 00549 avi_write_idx1(s); 00550 00551 ff_end_tag(pb, avi->riff_start); 00552 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi"); 00553 } 00554 00555 avi_stream2fourcc(tag, stream_index, enc->codec_type); 00556 if(pkt->flags&AV_PKT_FLAG_KEY) 00557 flags = 0x10; 00558 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) { 00559 avist->audio_strm_length += size; 00560 } 00561 00562 if (s->pb->seekable) { 00563 AVIIndex* idx = &avist->indexes; 00564 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE; 00565 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE; 00566 if (idx->ents_allocated <= idx->entry) { 00567 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1); 00568 if (!idx->cluster) 00569 return -1; 00570 idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry)); 00571 if (!idx->cluster[cl]) 00572 return -1; 00573 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE; 00574 } 00575 00576 idx->cluster[cl][id].flags = flags; 00577 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list; 00578 idx->cluster[cl][id].len = size; 00579 idx->entry++; 00580 } 00581 00582 avio_write(pb, tag, 4); 00583 avio_wl32(pb, size); 00584 avio_write(pb, pkt->data, size); 00585 if (size & 1) 00586 avio_w8(pb, 0); 00587 00588 avio_flush(pb); 00589 return 0; 00590 } 00591 00592 static int avi_write_trailer(AVFormatContext *s) 00593 { 00594 AVIContext *avi = s->priv_data; 00595 AVIOContext *pb = s->pb; 00596 int res = 0; 00597 int i, j, n, nb_frames; 00598 int64_t file_size; 00599 00600 if (pb->seekable){ 00601 if (avi->riff_id == 1) { 00602 ff_end_tag(pb, avi->movi_list); 00603 res = avi_write_idx1(s); 00604 ff_end_tag(pb, avi->riff_start); 00605 } else { 00606 avi_write_ix(s); 00607 ff_end_tag(pb, avi->movi_list); 00608 ff_end_tag(pb, avi->riff_start); 00609 00610 file_size = avio_tell(pb); 00611 avio_seek(pb, avi->odml_list - 8, SEEK_SET); 00612 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */ 00613 avio_skip(pb, 16); 00614 00615 for (n=nb_frames=0;n<s->nb_streams;n++) { 00616 AVCodecContext *stream = s->streams[n]->codec; 00617 AVIStream *avist= s->streams[n]->priv_data; 00618 00619 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) { 00620 if (nb_frames < avist->packet_count) 00621 nb_frames = avist->packet_count; 00622 } else { 00623 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) { 00624 nb_frames += avist->packet_count; 00625 } 00626 } 00627 } 00628 avio_wl32(pb, nb_frames); 00629 avio_seek(pb, file_size, SEEK_SET); 00630 00631 avi_write_counters(s, avi->riff_id); 00632 } 00633 } 00634 avio_flush(pb); 00635 00636 for (i=0; i<s->nb_streams; i++) { 00637 AVIStream *avist= s->streams[i]->priv_data; 00638 for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++) 00639 av_free(avist->indexes.cluster[j]); 00640 av_freep(&avist->indexes.cluster); 00641 avist->indexes.ents_allocated = avist->indexes.entry = 0; 00642 } 00643 00644 return res; 00645 } 00646 00647 AVOutputFormat ff_avi_muxer = { 00648 .name = "avi", 00649 .long_name = NULL_IF_CONFIG_SMALL("AVI format"), 00650 .mime_type = "video/x-msvideo", 00651 .extensions = "avi", 00652 .priv_data_size = sizeof(AVIContext), 00653 #if CONFIG_LIBMP3LAME_ENCODER 00654 .audio_codec = CODEC_ID_MP3, 00655 #else 00656 .audio_codec = CODEC_ID_AC3, 00657 #endif 00658 .video_codec = CODEC_ID_MPEG4, 00659 .write_header = avi_write_header, 00660 .write_packet = avi_write_packet, 00661 .write_trailer = avi_write_trailer, 00662 .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0}, 00663 .flags= AVFMT_VARIABLE_FPS, 00664 };