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 #include "avio_internal.h"
30 #include "libavformat/avlanguage.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavutil/dict.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/timestamp.h"
37 #include "libavutil/pixdesc.h"
38 #include "libavcodec/raw.h"
42 * - fill all fields if non streamed (nb_frames for example)
45 typedef struct AVIIentry {
46 unsigned int flags, pos, len;
49 #define AVI_INDEX_CLUSTER_SIZE 16384
51 typedef struct AVIIndex {
53 int64_t audio_strm_offset;
56 int master_odml_riff_id_base;
60 typedef struct AVIContext {
61 int64_t riff_start, movi_list, odml_list;
62 int64_t frames_hdr_all;
66 typedef struct AVIStream {
67 int64_t frames_hdr_strm;
68 int64_t audio_strm_length;
79 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt);
81 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
83 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
84 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
85 return &idx->cluster[cl][id];
88 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
89 const char *riff_tag, const char *list_tag)
91 AVIContext *avi = s->priv_data;
96 for (i = 0; i < s->nb_streams; i++) {
97 AVIStream *avist = s->streams[i]->priv_data;
98 avist->indexes.audio_strm_offset = avist->audio_strm_length;
99 avist->indexes.entry = 0;
102 avi->riff_start = ff_start_tag(pb, "RIFF");
103 ffio_wfourcc(pb, riff_tag);
104 loff = ff_start_tag(pb, "LIST");
105 ffio_wfourcc(pb, list_tag);
109 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
111 tag[0] = '0' + index / 10;
112 tag[1] = '0' + index % 10;
113 if (type == AVMEDIA_TYPE_VIDEO) {
116 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
117 // note: this is not an official code
128 static int avi_write_counters(AVFormatContext *s, int riff_id)
130 AVIOContext *pb = s->pb;
131 AVIContext *avi = s->priv_data;
132 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
134 AVCodecContext *stream;
136 file_size = avio_tell(pb);
137 for (n = 0; n < s->nb_streams; n++) {
138 AVIStream *avist = s->streams[n]->priv_data;
140 av_assert0(avist->frames_hdr_strm);
141 stream = s->streams[n]->codec;
142 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
143 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
145 avio_wl32(pb, avist->packet_count);
147 avio_wl32(pb, avist->audio_strm_length / au_ssize);
148 if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
149 nb_frames = FFMAX(nb_frames, avist->packet_count);
152 av_assert0(avi->frames_hdr_all);
153 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
154 avio_wl32(pb, nb_frames);
156 avio_seek(pb, file_size, SEEK_SET);
161 static void write_odml_master(AVFormatContext *s, int stream_index)
163 AVIOContext *pb = s->pb;
164 AVStream *st = s->streams[stream_index];
165 AVCodecContext *enc = st->codec;
166 AVIStream *avist = st->priv_data;
167 unsigned char tag[5];
170 /* Starting to lay out AVI OpenDML master index.
171 * We want to make it JUNK entry for now, since we'd
172 * like to get away without making AVI an OpenDML one
173 * for compatibility reasons. */
174 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
175 avio_wl16(pb, 4); /* wLongsPerEntry */
176 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
177 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
178 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
179 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
181 avio_wl64(pb, 0); /* dwReserved[3] */
182 avio_wl32(pb, 0); /* Must be 0. */
183 for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
185 ff_end_tag(pb, avist->indexes.indx_start);
188 static int avi_write_header(AVFormatContext *s)
190 AVIContext *avi = s->priv_data;
191 AVIOContext *pb = s->pb;
192 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
193 AVCodecContext *video_enc;
194 AVStream *video_st = NULL;
195 int64_t list1, list2, strh, strf;
196 AVDictionaryEntry *t = NULL;
199 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
200 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
201 AVI_MAX_STREAM_COUNT);
202 return AVERROR(EINVAL);
205 for (n = 0; n < s->nb_streams; n++) {
206 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
207 if (!s->streams[n]->priv_data)
208 return AVERROR(ENOMEM);
213 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
216 ffio_wfourcc(pb, "avih");
217 avio_wl32(pb, 14 * 4);
221 for (n = 0; n < s->nb_streams; n++) {
222 AVCodecContext *codec = s->streams[n]->codec;
223 bitrate += codec->bit_rate;
224 if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
226 video_st = s->streams[n];
232 // TODO: should be avg_frame_rate
234 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
235 video_st->time_base.den));
238 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
239 avio_wl32(pb, 0); /* padding */
241 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
243 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
244 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
245 avio_wl32(pb, nb_frames); /* nb frames, filled later */
246 avio_wl32(pb, 0); /* initial frame */
247 avio_wl32(pb, s->nb_streams); /* nb streams */
248 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
250 avio_wl32(pb, video_enc->width);
251 avio_wl32(pb, video_enc->height);
256 avio_wl32(pb, 0); /* reserved */
257 avio_wl32(pb, 0); /* reserved */
258 avio_wl32(pb, 0); /* reserved */
259 avio_wl32(pb, 0); /* reserved */
262 for (i = 0; i < n; i++) {
263 AVStream *st = s->streams[i];
264 AVCodecContext *enc = st->codec;
265 AVIStream *avist = st->priv_data;
266 list2 = ff_start_tag(pb, "LIST");
267 ffio_wfourcc(pb, "strl");
269 /* stream generic header */
270 strh = ff_start_tag(pb, "strh");
271 switch (enc->codec_type) {
272 case AVMEDIA_TYPE_SUBTITLE:
273 // XSUB subtitles behave like video tracks, other subtitles
274 // are not (yet) supported.
275 if (enc->codec_id != AV_CODEC_ID_XSUB) {
276 av_log(s, AV_LOG_ERROR,
277 "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
278 return AVERROR_PATCHWELCOME;
280 case AVMEDIA_TYPE_VIDEO:
281 ffio_wfourcc(pb, "vids");
283 case AVMEDIA_TYPE_AUDIO:
284 ffio_wfourcc(pb, "auds");
286 // case AVMEDIA_TYPE_TEXT:
287 // ffio_wfourcc(pb, "txts");
289 case AVMEDIA_TYPE_DATA:
290 ffio_wfourcc(pb, "dats");
293 if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
294 enc->codec_id == AV_CODEC_ID_XSUB)
295 avio_wl32(pb, enc->codec_tag);
298 avio_wl32(pb, 0); /* flags */
299 avio_wl16(pb, 0); /* priority */
300 avio_wl16(pb, 0); /* language */
301 avio_wl32(pb, 0); /* initial frame */
303 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
305 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
306 && enc->codec_id != AV_CODEC_ID_XSUB
307 && au_byterate > 1000LL*au_scale) {
311 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
312 if (enc->codec_id == AV_CODEC_ID_XSUB)
313 au_scale = au_byterate = 0;
315 avio_wl32(pb, au_scale); /* scale */
316 avio_wl32(pb, au_byterate); /* rate */
318 avio_wl32(pb, 0); /* start */
319 /* remember this offset to fill later */
320 avist->frames_hdr_strm = avio_tell(pb);
322 /* FIXME: this may be broken, but who cares */
323 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
325 avio_wl32(pb, 0); /* length, XXX: filled later */
327 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
328 if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
329 avio_wl32(pb, 1024 * 1024);
330 else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
331 avio_wl32(pb, 12 * 1024);
334 avio_wl32(pb, -1); /* quality */
335 avio_wl32(pb, au_ssize); /* sample size */
337 avio_wl16(pb, enc->width);
338 avio_wl16(pb, enc->height);
339 ff_end_tag(pb, strh);
341 if (enc->codec_type != AVMEDIA_TYPE_DATA) {
343 enum AVPixelFormat pix_fmt;
345 strf = ff_start_tag(pb, "strf");
346 switch (enc->codec_type) {
347 case AVMEDIA_TYPE_SUBTITLE:
348 /* XSUB subtitles behave like video tracks, other subtitles
349 * are not (yet) supported. */
350 if (enc->codec_id != AV_CODEC_ID_XSUB)
352 case AVMEDIA_TYPE_VIDEO:
353 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
355 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
356 && enc->pix_fmt == AV_PIX_FMT_RGB555LE
357 && enc->bits_per_coded_sample == 15)
358 enc->bits_per_coded_sample = 16;
359 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
360 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
361 enc->bits_per_coded_sample);
363 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
364 && enc->pix_fmt != pix_fmt
365 && enc->pix_fmt != AV_PIX_FMT_NONE)
366 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
367 av_get_pix_fmt_name(enc->pix_fmt));
369 case AVMEDIA_TYPE_AUDIO:
370 if ((ret = ff_put_wav_header(pb, enc, 0)) < 0)
374 av_log(s, AV_LOG_ERROR,
375 "Invalid or not supported codec type '%s' found in the input\n",
376 (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
377 return AVERROR(EINVAL);
379 ff_end_tag(pb, strf);
380 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
381 ff_riff_write_info_tag(s->pb, "strn", t->value);
384 if (enc->codec_id == AV_CODEC_ID_XSUB
385 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
386 const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
389 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
391 return AVERROR(ENOMEM);
392 ff_riff_write_info_tag(s->pb, "strn", str);
399 write_odml_master(s, i);
402 if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
403 st->sample_aspect_ratio.num > 0 &&
404 st->sample_aspect_ratio.den > 0) {
405 int vprp = ff_start_tag(pb, "vprp");
406 AVRational dar = av_mul_q(st->sample_aspect_ratio,
407 (AVRational) { enc->width,
410 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
412 avio_wl32(pb, 0); // video format = unknown
413 avio_wl32(pb, 0); // video standard = unknown
414 // TODO: should be avg_frame_rate
415 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
416 avio_wl32(pb, enc->width);
417 avio_wl32(pb, enc->height);
420 avio_wl32(pb, enc->width);
421 avio_wl32(pb, enc->height);
422 avio_wl32(pb, 1); // progressive FIXME
424 avio_wl32(pb, enc->height);
425 avio_wl32(pb, enc->width);
426 avio_wl32(pb, enc->height);
427 avio_wl32(pb, enc->width);
433 ff_end_tag(pb, vprp);
436 ff_end_tag(pb, list2);
440 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
441 avi->odml_list = ff_start_tag(pb, "JUNK");
442 ffio_wfourcc(pb, "odml");
443 ffio_wfourcc(pb, "dmlh");
445 for (i = 0; i < 248; i += 4)
447 ff_end_tag(pb, avi->odml_list);
450 ff_end_tag(pb, list1);
452 ff_riff_write_info(s);
455 padding = s->metadata_header_padding;
459 /* some padding for easier tag editing */
461 list2 = ff_start_tag(pb, "JUNK");
462 for (i = padding; i > 0; i -= 4)
464 ff_end_tag(pb, list2);
467 avi->movi_list = ff_start_tag(pb, "LIST");
468 ffio_wfourcc(pb, "movi");
475 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
477 AVIOContext *pb = s->pb;
478 AVIContext *avi = s->priv_data;
479 AVIStream *avist = s->streams[stream_index]->priv_data;
481 int au_byterate, au_ssize, au_scale;
486 /* Updating one entry in the AVI OpenDML master index */
487 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
488 ffio_wfourcc(pb, "indx"); /* enabling this entry */
490 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
491 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
492 avio_wl64(pb, ix); /* qwOffset */
493 avio_wl32(pb, size); /* dwSize */
494 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
495 if (s->streams[stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
496 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
497 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
498 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
499 avist->sample_requested = 1;
501 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
503 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
505 avio_seek(pb, pos, SEEK_SET);
508 static int avi_write_ix(AVFormatContext *s)
510 AVIOContext *pb = s->pb;
511 AVIContext *avi = s->priv_data;
513 char ix_tag[] = "ix00";
516 av_assert0(pb->seekable);
518 for (i = 0; i < s->nb_streams; i++) {
519 AVIStream *avist = s->streams[i]->priv_data;
520 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == AVI_MASTER_INDEX_SIZE) {
522 int size = 8+2+1+1+4+8+4+4+16*AVI_MASTER_INDEX_SIZE;
525 update_odml_entry(s, i, pos, size);
526 write_odml_master(s, i);
527 av_assert1(avio_tell(pb) - pos == size);
528 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
530 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < AVI_MASTER_INDEX_SIZE);
533 for (i = 0; i < s->nb_streams; i++) {
534 AVIStream *avist = s->streams[i]->priv_data;
537 avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
540 /* Writing AVI OpenDML leaf index chunk */
542 ffio_wfourcc(pb, ix_tag); /* ix?? */
543 avio_wl32(pb, avist->indexes.entry * 8 + 24);
545 avio_wl16(pb, 2); /* wLongsPerEntry */
546 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
547 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
548 avio_wl32(pb, avist->indexes.entry);
550 ffio_wfourcc(pb, tag); /* dwChunkId */
551 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
552 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
554 for (j = 0; j < avist->indexes.entry; j++) {
555 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
556 avio_wl32(pb, ie->pos + 8);
557 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
558 (ie->flags & 0x10 ? 0 : 0x80000000));
561 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
566 static int avi_write_idx1(AVFormatContext *s)
568 AVIOContext *pb = s->pb;
569 AVIContext *avi = s->priv_data;
576 AVIIentry *ie = 0, *tie;
577 int empty, stream_id = -1;
579 idx_chunk = ff_start_tag(pb, "idx1");
580 for (i = 0; i < s->nb_streams; i++) {
581 avist = s->streams[i]->priv_data;
587 for (i = 0; i < s->nb_streams; i++) {
588 avist = s->streams[i]->priv_data;
589 if (avist->indexes.entry <= avist->entry)
592 tie = avi_get_ientry(&avist->indexes, avist->entry);
593 if (empty || tie->pos < ie->pos) {
600 avist = s->streams[stream_id]->priv_data;
601 avi_stream2fourcc(tag, stream_id,
602 s->streams[stream_id]->codec->codec_type);
603 ffio_wfourcc(pb, tag);
604 avio_wl32(pb, ie->flags);
605 avio_wl32(pb, ie->pos);
606 avio_wl32(pb, ie->len);
610 ff_end_tag(pb, idx_chunk);
612 avi_write_counters(s, avi->riff_id);
617 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
619 AVIStream *avist = s->streams[stream_index]->priv_data;
620 AVCodecContext *enc = s->streams[stream_index]->codec;
622 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
623 while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
624 dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
625 AVPacket empty_packet;
627 if (dts - avist->packet_count > 60000) {
628 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
629 return AVERROR(EINVAL);
632 av_init_packet(&empty_packet);
633 empty_packet.size = 0;
634 empty_packet.data = NULL;
635 empty_packet.stream_index = stream_index;
636 avi_write_packet(s, &empty_packet);
637 ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
643 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
645 unsigned char tag[5];
646 unsigned int flags = 0;
647 const int stream_index = pkt->stream_index;
648 int size = pkt->size;
649 AVIContext *avi = s->priv_data;
650 AVIOContext *pb = s->pb;
651 AVIStream *avist = s->streams[stream_index]->priv_data;
652 AVCodecContext *enc = s->streams[stream_index]->codec;
655 if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
656 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
661 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
664 if (pkt->dts != AV_NOPTS_VALUE)
665 avist->last_dts = pkt->dts + pkt->duration;
667 avist->packet_count++;
669 // Make sure to put an OpenDML chunk when the file size exceeds the limits
671 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
673 ff_end_tag(pb, avi->movi_list);
675 if (avi->riff_id == 1)
678 ff_end_tag(pb, avi->riff_start);
679 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
682 avi_stream2fourcc(tag, stream_index, enc->codec_type);
683 if (pkt->flags & AV_PKT_FLAG_KEY)
685 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
686 avist->audio_strm_length += size;
688 if (s->pb->seekable) {
689 AVIIndex *idx = &avist->indexes;
690 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
691 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
692 if (idx->ents_allocated <= idx->entry) {
693 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
695 idx->ents_allocated = 0;
697 return AVERROR(ENOMEM);
700 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
701 if (!idx->cluster[cl])
702 return AVERROR(ENOMEM);
703 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
706 idx->cluster[cl][id].flags = flags;
707 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
708 idx->cluster[cl][id].len = size;
709 avist->max_size = FFMAX(avist->max_size, size);
713 avio_write(pb, tag, 4);
715 avio_write(pb, pkt->data, size);
722 static int avi_write_trailer(AVFormatContext *s)
724 AVIContext *avi = s->priv_data;
725 AVIOContext *pb = s->pb;
727 int i, j, n, nb_frames;
730 for (i = 0; i < s->nb_streams; i++) {
731 AVIStream *avist = s->streams[i]->priv_data;
732 write_skip_frames(s, i, avist->last_dts);
736 if (avi->riff_id == 1) {
737 ff_end_tag(pb, avi->movi_list);
738 res = avi_write_idx1(s);
739 ff_end_tag(pb, avi->riff_start);
742 ff_end_tag(pb, avi->movi_list);
743 ff_end_tag(pb, avi->riff_start);
745 file_size = avio_tell(pb);
746 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
747 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
750 for (n = nb_frames = 0; n < s->nb_streams; n++) {
751 AVCodecContext *stream = s->streams[n]->codec;
752 AVIStream *avist = s->streams[n]->priv_data;
754 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
755 if (nb_frames < avist->packet_count)
756 nb_frames = avist->packet_count;
758 if (stream->codec_id == AV_CODEC_ID_MP2 ||
759 stream->codec_id == AV_CODEC_ID_MP3)
760 nb_frames += avist->packet_count;
763 avio_wl32(pb, nb_frames);
764 avio_seek(pb, file_size, SEEK_SET);
766 avi_write_counters(s, avi->riff_id);
770 for (i = 0; i < s->nb_streams; i++) {
771 AVIStream *avist = s->streams[i]->priv_data;
772 for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
773 av_freep(&avist->indexes.cluster[j]);
774 av_freep(&avist->indexes.cluster);
775 avist->indexes.ents_allocated = avist->indexes.entry = 0;
777 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
778 avio_wl32(pb, avist->max_size);
785 AVOutputFormat ff_avi_muxer = {
787 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
788 .mime_type = "video/x-msvideo",
790 .priv_data_size = sizeof(AVIContext),
791 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
792 .video_codec = AV_CODEC_ID_MPEG4,
793 .write_header = avi_write_header,
794 .write_packet = avi_write_packet,
795 .write_trailer = avi_write_trailer,
796 .codec_tag = (const AVCodecTag * const []) {
797 ff_codec_bmp_tags, ff_codec_wav_tags, 0