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
24 #include "libavutil/intreadwrite.h"
28 * - fill all fields if non streamed (nb_frames for example)
31 typedef struct AVIIentry {
32 unsigned int flags, pos, len;
35 #define AVI_INDEX_CLUSTER_SIZE 16384
37 typedef struct AVIIndex {
45 int64_t riff_start, movi_list, odml_list;
46 int64_t frames_hdr_all;
51 int64_t frames_hdr_strm;
52 int audio_strm_length;
59 static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
61 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
62 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
63 return &idx->cluster[cl][id];
66 static int64_t avi_start_new_riff(AVFormatContext *s, ByteIOContext *pb,
67 const char* riff_tag, const char* list_tag)
69 AVIContext *avi= s->priv_data;
74 for (i=0; i<s->nb_streams; i++){
75 AVIStream *avist= s->streams[i]->priv_data;
76 avist->indexes.entry = 0;
79 avi->riff_start = ff_start_tag(pb, "RIFF");
80 put_tag(pb, riff_tag);
81 loff = ff_start_tag(pb, "LIST");
82 put_tag(pb, list_tag);
86 static char* avi_stream2fourcc(char* tag, int index, enum AVMediaType type)
90 if (type == AVMEDIA_TYPE_VIDEO) {
93 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
94 // note: this is not an official code
105 static void avi_write_info_tag(ByteIOContext *pb, const char *tag, const char *str)
107 int len = strlen(str);
118 static int avi_write_counters(AVFormatContext* s, int riff_id)
120 ByteIOContext *pb = s->pb;
121 AVIContext *avi = s->priv_data;
122 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
124 AVCodecContext* stream;
126 file_size = url_ftell(pb);
127 for(n = 0; n < s->nb_streams; n++) {
128 AVIStream *avist= s->streams[n]->priv_data;
130 assert(avist->frames_hdr_strm);
131 stream = s->streams[n]->codec;
132 url_fseek(pb, avist->frames_hdr_strm, SEEK_SET);
133 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
135 put_le32(pb, avist->packet_count);
137 put_le32(pb, avist->audio_strm_length / au_ssize);
139 if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
140 nb_frames = FFMAX(nb_frames, avist->packet_count);
143 assert(avi->frames_hdr_all);
144 url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
145 put_le32(pb, nb_frames);
147 url_fseek(pb, file_size, SEEK_SET);
152 static int avi_write_header(AVFormatContext *s)
154 AVIContext *avi = s->priv_data;
155 ByteIOContext *pb = s->pb;
156 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
157 AVCodecContext *stream, *video_enc;
158 int64_t list1, list2, strh, strf;
159 AVMetadataTag *t = NULL;
161 for(n=0;n<s->nb_streams;n++) {
162 s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream));
163 if(!s->streams[n]->priv_data)
164 return AVERROR(ENOMEM);
169 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
173 put_le32(pb, 14 * 4);
177 for(n=0;n<s->nb_streams;n++) {
178 stream = s->streams[n]->codec;
179 bitrate += stream->bit_rate;
180 if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
187 put_le32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
191 put_le32(pb, bitrate / 8); /* XXX: not quite exact */
192 put_le32(pb, 0); /* padding */
193 if (url_is_streamed(pb))
194 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
196 put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
197 avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
198 put_le32(pb, nb_frames); /* nb frames, filled later */
199 put_le32(pb, 0); /* initial frame */
200 put_le32(pb, s->nb_streams); /* nb streams */
201 put_le32(pb, 1024 * 1024); /* suggested buffer size */
203 put_le32(pb, video_enc->width);
204 put_le32(pb, video_enc->height);
209 put_le32(pb, 0); /* reserved */
210 put_le32(pb, 0); /* reserved */
211 put_le32(pb, 0); /* reserved */
212 put_le32(pb, 0); /* reserved */
216 AVIStream *avist= s->streams[i]->priv_data;
217 list2 = ff_start_tag(pb, "LIST");
220 stream = s->streams[i]->codec;
222 /* stream generic header */
223 strh = ff_start_tag(pb, "strh");
224 switch(stream->codec_type) {
225 case AVMEDIA_TYPE_SUBTITLE:
226 // XSUB subtitles behave like video tracks, other subtitles
227 // are not (yet) supported.
228 if (stream->codec_id != CODEC_ID_XSUB) break;
229 case AVMEDIA_TYPE_VIDEO: put_tag(pb, "vids"); break;
230 case AVMEDIA_TYPE_AUDIO: put_tag(pb, "auds"); break;
231 // case AVMEDIA_TYPE_TEXT : put_tag(pb, "txts"); break;
232 case AVMEDIA_TYPE_DATA : put_tag(pb, "dats"); break;
234 if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
235 stream->codec_id == CODEC_ID_XSUB)
236 put_le32(pb, stream->codec_tag);
239 put_le32(pb, 0); /* flags */
240 put_le16(pb, 0); /* priority */
241 put_le16(pb, 0); /* language */
242 put_le32(pb, 0); /* initial frame */
244 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
246 put_le32(pb, au_scale); /* scale */
247 put_le32(pb, au_byterate); /* rate */
248 av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
250 put_le32(pb, 0); /* start */
251 avist->frames_hdr_strm = url_ftell(pb); /* remember this offset to fill later */
252 if (url_is_streamed(pb))
253 put_le32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
255 put_le32(pb, 0); /* length, XXX: filled later */
257 /* suggested buffer size */ //FIXME set at the end to largest chunk
258 if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
259 put_le32(pb, 1024 * 1024);
260 else if(stream->codec_type == AVMEDIA_TYPE_AUDIO)
261 put_le32(pb, 12 * 1024);
264 put_le32(pb, -1); /* quality */
265 put_le32(pb, au_ssize); /* sample size */
267 put_le16(pb, stream->width);
268 put_le16(pb, stream->height);
269 ff_end_tag(pb, strh);
271 if(stream->codec_type != AVMEDIA_TYPE_DATA){
272 strf = ff_start_tag(pb, "strf");
273 switch(stream->codec_type) {
274 case AVMEDIA_TYPE_SUBTITLE:
275 // XSUB subtitles behave like video tracks, other subtitles
276 // are not (yet) supported.
277 if (stream->codec_id != CODEC_ID_XSUB) break;
278 case AVMEDIA_TYPE_VIDEO:
279 ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
281 case AVMEDIA_TYPE_AUDIO:
282 if (ff_put_wav_header(pb, stream) < 0) {
289 ff_end_tag(pb, strf);
290 if ((t = av_metadata_get(s->streams[i]->metadata, "strn", NULL, 0))) {
291 avi_write_info_tag(s->pb, t->key, t->value);
294 //FIXME a limitation of metadata conversion system
295 else if ((t = av_metadata_get(s->streams[i]->metadata, "INAM", NULL, 0))) {
296 avi_write_info_tag(s->pb, "strn", t->value);
301 if (!url_is_streamed(pb)) {
302 unsigned char tag[5];
305 /* Starting to lay out AVI OpenDML master index.
306 * We want to make it JUNK entry for now, since we'd
307 * like to get away without making AVI an OpenDML one
308 * for compatibility reasons.
310 avist->indexes.entry = avist->indexes.ents_allocated = 0;
311 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
312 put_le16(pb, 4); /* wLongsPerEntry */
313 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
314 put_byte(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
315 put_le32(pb, 0); /* nEntriesInUse (will fill out later on) */
316 put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));
318 put_le64(pb, 0); /* dwReserved[3]
319 put_le32(pb, 0); Must be 0. */
320 for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
322 ff_end_tag(pb, avist->indexes.indx_start);
325 if( stream->codec_type == AVMEDIA_TYPE_VIDEO
326 && s->streams[i]->sample_aspect_ratio.num>0
327 && s->streams[i]->sample_aspect_ratio.den>0){
328 int vprp= ff_start_tag(pb, "vprp");
329 AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
330 (AVRational){stream->width, stream->height});
332 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
334 put_le32(pb, 0); //video format = unknown
335 put_le32(pb, 0); //video standard= unknown
336 put_le32(pb, lrintf(1.0/av_q2d(stream->time_base)));
337 put_le32(pb, stream->width );
338 put_le32(pb, stream->height);
341 put_le32(pb, stream->width );
342 put_le32(pb, stream->height);
343 put_le32(pb, 1); //progressive FIXME
345 put_le32(pb, stream->height);
346 put_le32(pb, stream->width );
347 put_le32(pb, stream->height);
348 put_le32(pb, stream->width );
354 ff_end_tag(pb, vprp);
357 ff_end_tag(pb, list2);
360 if (!url_is_streamed(pb)) {
361 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
362 avi->odml_list = ff_start_tag(pb, "JUNK");
366 for (i = 0; i < 248; i+= 4)
368 ff_end_tag(pb, avi->odml_list);
371 ff_end_tag(pb, list1);
373 list2 = ff_start_tag(pb, "LIST");
375 for (i = 0; *ff_avi_tags[i]; i++) {
376 if ((t = av_metadata_get(s->metadata, ff_avi_tags[i], NULL, AV_METADATA_MATCH_CASE)))
377 avi_write_info_tag(s->pb, t->key, t->value);
379 ff_end_tag(pb, list2);
381 /* some padding for easier tag editing */
382 list2 = ff_start_tag(pb, "JUNK");
383 for (i = 0; i < 1016; i += 4)
385 ff_end_tag(pb, list2);
387 avi->movi_list = ff_start_tag(pb, "LIST");
390 put_flush_packet(pb);
395 static int avi_write_ix(AVFormatContext *s)
397 ByteIOContext *pb = s->pb;
398 AVIContext *avi = s->priv_data;
400 char ix_tag[] = "ix00";
403 assert(!url_is_streamed(pb));
405 if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
408 for (i=0;i<s->nb_streams;i++) {
409 AVIStream *avist= s->streams[i]->priv_data;
412 avi_stream2fourcc(&tag[0], i, s->streams[i]->codec->codec_type);
415 /* Writing AVI OpenDML leaf index chunk */
417 put_tag(pb, &ix_tag[0]); /* ix?? */
418 put_le32(pb, avist->indexes.entry * 8 + 24);
420 put_le16(pb, 2); /* wLongsPerEntry */
421 put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
422 put_byte(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
423 put_le32(pb, avist->indexes.entry);
425 put_tag(pb, &tag[0]); /* dwChunkId */
426 put_le64(pb, avi->movi_list);/* qwBaseOffset */
427 put_le32(pb, 0); /* dwReserved_3 (must be 0) */
429 for (j=0; j<avist->indexes.entry; j++) {
430 AVIIentry* ie = avi_get_ientry(&avist->indexes, j);
431 put_le32(pb, ie->pos + 8);
432 put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |
433 (ie->flags & 0x10 ? 0 : 0x80000000));
435 put_flush_packet(pb);
438 /* Updating one entry in the AVI OpenDML master index */
439 url_fseek(pb, avist->indexes.indx_start - 8, SEEK_SET);
440 put_tag(pb, "indx"); /* enabling this entry */
442 put_le32(pb, avi->riff_id); /* nEntriesInUse */
443 url_fskip(pb, 16*avi->riff_id);
444 put_le64(pb, ix); /* qwOffset */
445 put_le32(pb, pos - ix); /* dwSize */
446 put_le32(pb, avist->indexes.entry); /* dwDuration */
448 url_fseek(pb, pos, SEEK_SET);
453 static int avi_write_idx1(AVFormatContext *s)
455 ByteIOContext *pb = s->pb;
456 AVIContext *avi = s->priv_data;
461 if (!url_is_streamed(pb)) {
463 AVIIentry* ie = 0, *tie;
464 int empty, stream_id = -1;
466 idx_chunk = ff_start_tag(pb, "idx1");
467 for(i=0; i<s->nb_streams; i++){
468 avist= s->streams[i]->priv_data;
474 for (i=0; i<s->nb_streams; i++) {
475 avist= s->streams[i]->priv_data;
476 if (avist->indexes.entry <= avist->entry)
479 tie = avi_get_ientry(&avist->indexes, avist->entry);
480 if (empty || tie->pos < ie->pos) {
487 avist= s->streams[stream_id]->priv_data;
488 avi_stream2fourcc(&tag[0], stream_id,
489 s->streams[stream_id]->codec->codec_type);
490 put_tag(pb, &tag[0]);
491 put_le32(pb, ie->flags);
492 put_le32(pb, ie->pos);
493 put_le32(pb, ie->len);
497 ff_end_tag(pb, idx_chunk);
499 avi_write_counters(s, avi->riff_id);
504 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
506 AVIContext *avi = s->priv_data;
507 ByteIOContext *pb = s->pb;
508 unsigned char tag[5];
509 unsigned int flags=0;
510 const int stream_index= pkt->stream_index;
511 AVIStream *avist= s->streams[stream_index]->priv_data;
512 AVCodecContext *enc= s->streams[stream_index]->codec;
515 // av_log(s, AV_LOG_DEBUG, "%"PRId64" %d %d\n", pkt->dts, avi->packet_count[stream_index], stream_index);
516 while(enc->block_align==0 && pkt->dts != AV_NOPTS_VALUE && pkt->dts > avist->packet_count){
517 AVPacket empty_packet;
519 av_init_packet(&empty_packet);
520 empty_packet.size= 0;
521 empty_packet.data= NULL;
522 empty_packet.stream_index= stream_index;
523 avi_write_packet(s, &empty_packet);
524 // av_log(s, AV_LOG_DEBUG, "dup %"PRId64" %d\n", pkt->dts, avi->packet_count[stream_index]);
526 avist->packet_count++;
528 // Make sure to put an OpenDML chunk when the file size exceeds the limits
529 if (!url_is_streamed(pb) &&
530 (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
533 ff_end_tag(pb, avi->movi_list);
535 if (avi->riff_id == 1)
538 ff_end_tag(pb, avi->riff_start);
539 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
542 avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
543 if(pkt->flags&AV_PKT_FLAG_KEY)
545 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
546 avist->audio_strm_length += size;
549 if (!url_is_streamed(s->pb)) {
550 AVIIndex* idx = &avist->indexes;
551 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
552 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
553 if (idx->ents_allocated <= idx->entry) {
554 idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
557 idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
558 if (!idx->cluster[cl])
560 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
563 idx->cluster[cl][id].flags = flags;
564 idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
565 idx->cluster[cl][id].len = size;
569 put_buffer(pb, tag, 4);
571 put_buffer(pb, pkt->data, size);
575 put_flush_packet(pb);
579 static int avi_write_trailer(AVFormatContext *s)
581 AVIContext *avi = s->priv_data;
582 ByteIOContext *pb = s->pb;
584 int i, j, n, nb_frames;
587 if (!url_is_streamed(pb)){
588 if (avi->riff_id == 1) {
589 ff_end_tag(pb, avi->movi_list);
590 res = avi_write_idx1(s);
591 ff_end_tag(pb, avi->riff_start);
594 ff_end_tag(pb, avi->movi_list);
595 ff_end_tag(pb, avi->riff_start);
597 file_size = url_ftell(pb);
598 url_fseek(pb, avi->odml_list - 8, SEEK_SET);
599 put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
602 for (n=nb_frames=0;n<s->nb_streams;n++) {
603 AVCodecContext *stream = s->streams[n]->codec;
604 AVIStream *avist= s->streams[n]->priv_data;
606 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
607 if (nb_frames < avist->packet_count)
608 nb_frames = avist->packet_count;
610 if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
611 nb_frames += avist->packet_count;
615 put_le32(pb, nb_frames);
616 url_fseek(pb, file_size, SEEK_SET);
618 avi_write_counters(s, avi->riff_id);
621 put_flush_packet(pb);
623 for (i=0; i<s->nb_streams; i++) {
624 AVIStream *avist= s->streams[i]->priv_data;
625 for (j=0; j<avist->indexes.ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
626 av_free(avist->indexes.cluster[j]);
627 av_freep(&avist->indexes.cluster);
628 avist->indexes.ents_allocated = avist->indexes.entry = 0;
634 AVOutputFormat avi_muxer = {
636 NULL_IF_CONFIG_SMALL("AVI format"),
645 .codec_tag= (const AVCodecTag* const []){ff_codec_bmp_tags, ff_codec_wav_tags, 0},
646 .flags= AVFMT_VARIABLE_FPS,
647 .metadata_conv = ff_avi_metadata_conv,