3 * Copyright (c) 2000 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 * - fill all fields if non streamed (nb_frames for example)
30 typedef struct AVIIentry {
31 unsigned int flags, pos, len;
34 #define AVI_INDEX_CLUSTER_SIZE 16384
36 typedef struct AVIIndex {
44 int64_t riff_start, movi_list, odml_list;
45 int64_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
46 int audio_strm_length[MAX_STREAMS];
48 int packet_count[MAX_STREAMS];
50 AVIIndex indexes[MAX_STREAMS];
53 static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
55 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
56 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
57 return &idx->cluster[cl][id];
60 static int64_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb,
61 const char* riff_tag, const char* list_tag)
67 for (i=0; i<MAX_STREAMS; i++)
68 avi->indexes[i].entry = 0;
70 avi->riff_start = start_tag(pb, "RIFF");
71 put_tag(pb, riff_tag);
72 loff = start_tag(pb, "LIST");
73 put_tag(pb, list_tag);
77 static char* avi_stream2fourcc(char* tag, int index, enum CodecType type)
81 if (type == CODEC_TYPE_VIDEO) {
92 static void avi_write_info_tag(ByteIOContext *pb, const char *tag, const char *str)
94 int len = strlen(str);
105 static void avi_write_info_tag2(AVFormatContext *s, const char *fourcc, const char *key1, const char *key2)
107 AVMetadataTag *tag= av_metadata_get(s->metadata, key1, NULL, 0);
109 tag= av_metadata_get(s->metadata, key2, NULL, 0);
111 avi_write_info_tag(s->pb, fourcc, tag->value);
114 static int avi_write_counters(AVFormatContext* s, int riff_id)
116 ByteIOContext *pb = s->pb;
117 AVIContext *avi = s->priv_data;
118 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
120 AVCodecContext* stream;
122 file_size = url_ftell(pb);
123 for(n = 0; n < s->nb_streams; n++) {
124 assert(avi->frames_hdr_strm[n]);
125 stream = s->streams[n]->codec;
126 url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
127 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
129 put_le32(pb, avi->packet_count[n]);
131 put_le32(pb, avi->audio_strm_length[n] / au_ssize);
133 if(stream->codec_type == CODEC_TYPE_VIDEO)
134 nb_frames = FFMAX(nb_frames, avi->packet_count[n]);
137 assert(avi->frames_hdr_all);
138 url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
139 put_le32(pb, nb_frames);
141 url_fseek(pb, file_size, SEEK_SET);
146 static int avi_write_header(AVFormatContext *s)
148 AVIContext *avi = s->priv_data;
149 ByteIOContext *pb = s->pb;
150 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
151 AVCodecContext *stream, *video_enc;
152 int64_t list1, list2, strh, strf;
156 list1 = avi_start_new_riff(avi, pb, "AVI ", "hdrl");
160 put_le32(pb, 14 * 4);
164 for(n=0;n<s->nb_streams;n++) {
165 stream = s->streams[n]->codec;
166 bitrate += stream->bit_rate;
167 if (stream->codec_type == CODEC_TYPE_VIDEO)
174 put_le32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
178 put_le32(pb, bitrate / 8); /* XXX: not quite exact */
179 put_le32(pb, 0); /* padding */
180 if (url_is_streamed(pb))
181 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
183 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
184 avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
185 put_le32(pb, nb_frames); /* nb frames, filled later */
186 put_le32(pb, 0); /* initial frame */
187 put_le32(pb, s->nb_streams); /* nb streams */
188 put_le32(pb, 1024 * 1024); /* suggested buffer size */
190 put_le32(pb, video_enc->width);
191 put_le32(pb, video_enc->height);
196 put_le32(pb, 0); /* reserved */
197 put_le32(pb, 0); /* reserved */
198 put_le32(pb, 0); /* reserved */
199 put_le32(pb, 0); /* reserved */
203 list2 = start_tag(pb, "LIST");
206 stream = s->streams[i]->codec;
208 /* stream generic header */
209 strh = start_tag(pb, "strh");
210 switch(stream->codec_type) {
211 case CODEC_TYPE_VIDEO: put_tag(pb, "vids"); break;
212 case CODEC_TYPE_AUDIO: put_tag(pb, "auds"); break;
213 // case CODEC_TYPE_TEXT : put_tag(pb, "txts"); break;
214 case CODEC_TYPE_DATA : put_tag(pb, "dats"); break;
216 if(stream->codec_type == CODEC_TYPE_VIDEO)
217 put_le32(pb, stream->codec_tag);
220 put_le32(pb, 0); /* flags */
221 put_le16(pb, 0); /* priority */
222 put_le16(pb, 0); /* language */
223 put_le32(pb, 0); /* initial frame */
225 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
227 put_le32(pb, au_scale); /* scale */
228 put_le32(pb, au_byterate); /* rate */
229 av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
231 put_le32(pb, 0); /* start */
232 avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
233 if (url_is_streamed(pb))
234 put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
236 put_le32(pb, 0); /* length, XXX: filled later */
238 /* suggested buffer size */ //FIXME set at the end to largest chunk
239 if(stream->codec_type == CODEC_TYPE_VIDEO)
240 put_le32(pb, 1024 * 1024);
241 else if(stream->codec_type == CODEC_TYPE_AUDIO)
242 put_le32(pb, 12 * 1024);
245 put_le32(pb, -1); /* quality */
246 put_le32(pb, au_ssize); /* sample size */
248 put_le16(pb, stream->width);
249 put_le16(pb, stream->height);
252 if(stream->codec_type != CODEC_TYPE_DATA){
253 strf = start_tag(pb, "strf");
254 switch(stream->codec_type) {
255 case CODEC_TYPE_VIDEO:
256 put_bmp_header(pb, stream, codec_bmp_tags, 0);
258 case CODEC_TYPE_AUDIO:
259 if (put_wav_header(pb, stream) < 0) {
269 if (!url_is_streamed(pb)) {
270 unsigned char tag[5];
273 /* Starting to lay out AVI OpenDML master index.
274 * We want to make it JUNK entry for now, since we'd
275 * like to get away without making AVI an OpenDML one
276 * for compatibility reasons.
278 avi->indexes[i].entry = avi->indexes[i].ents_allocated = 0;
279 avi->indexes[i].indx_start = start_tag(pb, "JUNK");
280 put_le16(pb, 4); /* wLongsPerEntry */
281 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
282 put_byte(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
283 put_le32(pb, 0); /* nEntriesInUse (will fill out later on) */
284 put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));
286 put_le64(pb, 0); /* dwReserved[3]
287 put_le32(pb, 0); Must be 0. */
288 for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
290 end_tag(pb, avi->indexes[i].indx_start);
293 if( stream->codec_type == CODEC_TYPE_VIDEO
294 && s->streams[i]->sample_aspect_ratio.num>0
295 && s->streams[i]->sample_aspect_ratio.den>0){
296 int vprp= start_tag(pb, "vprp");
297 AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
298 (AVRational){stream->width, stream->height});
300 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
302 put_le32(pb, 0); //video format = unknown
303 put_le32(pb, 0); //video standard= unknown
304 put_le32(pb, lrintf(1.0/av_q2d(stream->time_base)));
305 put_le32(pb, stream->width );
306 put_le32(pb, stream->height);
309 put_le32(pb, stream->width );
310 put_le32(pb, stream->height);
311 put_le32(pb, 1); //progressive FIXME
313 put_le32(pb, stream->height);
314 put_le32(pb, stream->width );
315 put_le32(pb, stream->height);
316 put_le32(pb, stream->width );
328 if (!url_is_streamed(pb)) {
329 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
330 avi->odml_list = start_tag(pb, "JUNK");
334 for (i = 0; i < 248; i+= 4)
336 end_tag(pb, avi->odml_list);
341 list2 = start_tag(pb, "LIST");
343 avi_write_info_tag2(s, "INAM", "Title", NULL);
344 avi_write_info_tag2(s, "IART", "Artist", "Author");
345 avi_write_info_tag2(s, "ICOP", "Copyright", NULL);
346 avi_write_info_tag2(s, "ICMT", "Comment", NULL);
347 avi_write_info_tag2(s, "IPRD", "Album", NULL);
348 avi_write_info_tag2(s, "IGNR", "Genre", NULL);
349 avi_write_info_tag2(s, "IPRT", "Track", NULL);
350 if(!(s->streams[0]->codec->flags & CODEC_FLAG_BITEXACT))
351 avi_write_info_tag(pb, "ISFT", LIBAVFORMAT_IDENT);
354 /* some padding for easier tag editing */
355 list2 = start_tag(pb, "JUNK");
356 for (i = 0; i < 1016; i += 4)
360 avi->movi_list = start_tag(pb, "LIST");
363 put_flush_packet(pb);
368 static int avi_write_ix(AVFormatContext *s)
370 ByteIOContext *pb = s->pb;
371 AVIContext *avi = s->priv_data;
373 char ix_tag[] = "ix00";
376 assert(!url_is_streamed(pb));
378 if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
381 for (i=0;i<s->nb_streams;i++) {
384 avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type);
387 /* Writing AVI OpenDML leaf index chunk */
389 put_tag(pb, &ix_tag[0]); /* ix?? */
390 put_le32(pb, avi->indexes[i].entry * 8 + 24);
392 put_le16(pb, 2); /* wLongsPerEntry */
393 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
394 put_byte(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
395 put_le32(pb, avi->indexes[i].entry);
397 put_tag(pb, &tag[0]); /* dwChunkId */
398 put_le64(pb, avi->movi_list);/* qwBaseOffset */
399 put_le32(pb, 0); /* dwReserved_3 (must be 0) */
401 for (j=0; j<avi->indexes[i].entry; j++) {
402 AVIIentry* ie = avi_get_ientry(&avi->indexes[i], j);
403 put_le32(pb, ie->pos + 8);
404 put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |
405 (ie->flags & 0x10 ? 0 : 0x80000000));
407 put_flush_packet(pb);
410 /* Updating one entry in the AVI OpenDML master index */
411 url_fseek(pb, avi->indexes[i].indx_start - 8, SEEK_SET);
412 put_tag(pb, "indx"); /* enabling this entry */
414 put_le32(pb, avi->riff_id); /* nEntriesInUse */
415 url_fskip(pb, 16*avi->riff_id);
416 put_le64(pb, ix); /* qwOffset */
417 put_le32(pb, pos - ix); /* dwSize */
418 put_le32(pb, avi->indexes[i].entry); /* dwDuration */
420 url_fseek(pb, pos, SEEK_SET);
425 static int avi_write_idx1(AVFormatContext *s)
427 ByteIOContext *pb = s->pb;
428 AVIContext *avi = s->priv_data;
433 if (!url_is_streamed(pb)) {
434 AVIIentry* ie = 0, *tie;
435 int entry[MAX_STREAMS];
436 int empty, stream_id = -1;
438 idx_chunk = start_tag(pb, "idx1");
439 memset(&entry[0], 0, sizeof(entry));
442 for (i=0; i<s->nb_streams; i++) {
443 if (avi->indexes[i].entry <= entry[i])
446 tie = avi_get_ientry(&avi->indexes[i], entry[i]);
447 if (empty || tie->pos < ie->pos) {
454 avi_stream2fourcc(&tag[0], stream_id,
455 s->streams[stream_id]->codec->codec_type);
456 put_tag(pb, &tag[0]);
457 put_le32(pb, ie->flags);
458 put_le32(pb, ie->pos);
459 put_le32(pb, ie->len);
463 end_tag(pb, idx_chunk);
465 avi_write_counters(s, avi->riff_id);
470 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
472 AVIContext *avi = s->priv_data;
473 ByteIOContext *pb = s->pb;
474 unsigned char tag[5];
475 unsigned int flags=0;
476 const int stream_index= pkt->stream_index;
477 AVCodecContext *enc= s->streams[stream_index]->codec;
480 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
481 while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avi->packet_count[stream_index]){
482 AVPacket empty_packet;
484 av_init_packet(&empty_packet);
485 empty_packet.size= 0;
486 empty_packet.data= NULL;
487 empty_packet.stream_index= stream_index;
488 avi_write_packet(s, &empty_packet);
489 // av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
491 avi->packet_count[stream_index]++;
493 // Make sure to put an OpenDML chunk when the file size exceeds the limits
494 if (!url_is_streamed(pb) &&
495 (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
498 end_tag(pb, avi->movi_list);
500 if (avi->riff_id == 1)
503 end_tag(pb, avi->riff_start);
504 avi->movi_list = avi_start_new_riff(avi, pb, "AVIX", "movi");
507 avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
508 if(pkt->flags&PKT_FLAG_KEY)
510 if (enc->codec_type == CODEC_TYPE_AUDIO) {
511 avi->audio_strm_length[stream_index] += size;
514 if (!url_is_streamed(s->pb)) {
515 AVIIndex* idx = &avi->indexes[stream_index];
516 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
517 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
518 if (idx->ents_allocated <= idx->entry) {
519 idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
522 idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
523 if (!idx->cluster[cl])
525 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
528 idx->cluster[cl][id].flags = flags;
529 idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
530 idx->cluster[cl][id].len = size;
534 put_buffer(pb, tag, 4);
536 put_buffer(pb, pkt->data, size);
540 put_flush_packet(pb);
544 static int avi_write_trailer(AVFormatContext *s)
546 AVIContext *avi = s->priv_data;
547 ByteIOContext *pb = s->pb;
549 int i, j, n, nb_frames;
552 if (!url_is_streamed(pb)){
553 if (avi->riff_id == 1) {
554 end_tag(pb, avi->movi_list);
555 res = avi_write_idx1(s);
556 end_tag(pb, avi->riff_start);
559 end_tag(pb, avi->movi_list);
560 end_tag(pb, avi->riff_start);
562 file_size = url_ftell(pb);
563 url_fseek(pb, avi->odml_list - 8, SEEK_SET);
564 put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
567 for (n=nb_frames=0;n<s->nb_streams;n++) {
568 AVCodecContext *stream = s->streams[n]->codec;
569 if (stream->codec_type == CODEC_TYPE_VIDEO) {
570 if (nb_frames < avi->packet_count[n])
571 nb_frames = avi->packet_count[n];
573 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
574 nb_frames += avi->packet_count[n];
578 put_le32(pb, nb_frames);
579 url_fseek(pb, file_size, SEEK_SET);
581 avi_write_counters(s, avi->riff_id);
584 put_flush_packet(pb);
586 for (i=0; i<MAX_STREAMS; i++) {
587 for (j=0; j<avi->indexes[i].ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
588 av_free(avi->indexes[i].cluster[j]);
589 av_freep(&avi->indexes[i].cluster);
590 avi->indexes[i].ents_allocated = avi->indexes[i].entry = 0;
596 AVOutputFormat avi_muxer = {
598 NULL_IF_CONFIG_SMALL("AVI format"),
607 .codec_tag= (const AVCodecTag* const []){codec_bmp_tags, codec_wav_tags, 0},
608 .flags= AVFMT_VARIABLE_FPS,