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/opt.h"
38 #include "libavutil/pixdesc.h"
39 #include "libavcodec/raw.h"
43 * - fill all fields if non streamed (nb_frames for example)
46 typedef struct AVIIentry {
47 unsigned int flags, pos, len;
50 #define AVI_INDEX_CLUSTER_SIZE 16384
52 typedef struct AVIIndex {
54 int64_t audio_strm_offset;
57 int master_odml_riff_id_base;
61 typedef struct AVIContext {
63 int64_t riff_start, movi_list, odml_list;
64 int64_t frames_hdr_all;
66 int write_channel_mask;
69 typedef struct AVIStream {
70 int64_t frames_hdr_strm;
71 int64_t audio_strm_length;
82 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt);
84 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
86 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
87 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
88 return &idx->cluster[cl][id];
91 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
92 const char *riff_tag, const char *list_tag)
94 AVIContext *avi = s->priv_data;
99 for (i = 0; i < s->nb_streams; i++) {
100 AVIStream *avist = s->streams[i]->priv_data;
101 avist->indexes.audio_strm_offset = avist->audio_strm_length;
102 avist->indexes.entry = 0;
105 avi->riff_start = ff_start_tag(pb, "RIFF");
106 ffio_wfourcc(pb, riff_tag);
107 loff = ff_start_tag(pb, "LIST");
108 ffio_wfourcc(pb, list_tag);
112 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
114 tag[0] = '0' + index / 10;
115 tag[1] = '0' + index % 10;
116 if (type == AVMEDIA_TYPE_VIDEO) {
119 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
120 // note: this is not an official code
131 static int avi_write_counters(AVFormatContext *s, int riff_id)
133 AVIOContext *pb = s->pb;
134 AVIContext *avi = s->priv_data;
135 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
137 AVCodecContext *stream;
139 file_size = avio_tell(pb);
140 for (n = 0; n < s->nb_streams; n++) {
141 AVIStream *avist = s->streams[n]->priv_data;
143 av_assert0(avist->frames_hdr_strm);
144 stream = s->streams[n]->codec;
145 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
146 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
148 avio_wl32(pb, avist->packet_count);
150 avio_wl32(pb, avist->audio_strm_length / au_ssize);
151 if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
152 nb_frames = FFMAX(nb_frames, avist->packet_count);
155 av_assert0(avi->frames_hdr_all);
156 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
157 avio_wl32(pb, nb_frames);
159 avio_seek(pb, file_size, SEEK_SET);
164 static void write_odml_master(AVFormatContext *s, int stream_index)
166 AVIOContext *pb = s->pb;
167 AVStream *st = s->streams[stream_index];
168 AVCodecContext *enc = st->codec;
169 AVIStream *avist = st->priv_data;
170 unsigned char tag[5];
173 /* Starting to lay out AVI OpenDML master index.
174 * We want to make it JUNK entry for now, since we'd
175 * like to get away without making AVI an OpenDML one
176 * for compatibility reasons. */
177 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
178 avio_wl16(pb, 4); /* wLongsPerEntry */
179 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
180 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
181 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
182 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
184 avio_wl64(pb, 0); /* dwReserved[3] */
185 avio_wl32(pb, 0); /* Must be 0. */
186 for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
188 ff_end_tag(pb, avist->indexes.indx_start);
191 static int avi_write_header(AVFormatContext *s)
193 AVIContext *avi = s->priv_data;
194 AVIOContext *pb = s->pb;
195 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
196 AVCodecContext *video_enc;
197 AVStream *video_st = NULL;
198 int64_t list1, list2, strh, strf;
199 AVDictionaryEntry *t = NULL;
202 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
203 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
204 AVI_MAX_STREAM_COUNT);
205 return AVERROR(EINVAL);
208 for (n = 0; n < s->nb_streams; n++) {
209 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
210 if (!s->streams[n]->priv_data)
211 return AVERROR(ENOMEM);
216 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
219 ffio_wfourcc(pb, "avih");
220 avio_wl32(pb, 14 * 4);
224 for (n = 0; n < s->nb_streams; n++) {
225 AVCodecContext *codec = s->streams[n]->codec;
226 bitrate += codec->bit_rate;
227 if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
229 video_st = s->streams[n];
235 // TODO: should be avg_frame_rate
237 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
238 video_st->time_base.den));
241 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
242 avio_wl32(pb, 0); /* padding */
244 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
246 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
247 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
248 avio_wl32(pb, nb_frames); /* nb frames, filled later */
249 avio_wl32(pb, 0); /* initial frame */
250 avio_wl32(pb, s->nb_streams); /* nb streams */
251 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
253 avio_wl32(pb, video_enc->width);
254 avio_wl32(pb, video_enc->height);
259 avio_wl32(pb, 0); /* reserved */
260 avio_wl32(pb, 0); /* reserved */
261 avio_wl32(pb, 0); /* reserved */
262 avio_wl32(pb, 0); /* reserved */
265 for (i = 0; i < n; i++) {
266 AVStream *st = s->streams[i];
267 AVCodecContext *enc = st->codec;
268 AVIStream *avist = st->priv_data;
269 list2 = ff_start_tag(pb, "LIST");
270 ffio_wfourcc(pb, "strl");
272 /* stream generic header */
273 strh = ff_start_tag(pb, "strh");
274 switch (enc->codec_type) {
275 case AVMEDIA_TYPE_SUBTITLE:
276 // XSUB subtitles behave like video tracks, other subtitles
277 // are not (yet) supported.
278 if (enc->codec_id != AV_CODEC_ID_XSUB) {
279 av_log(s, AV_LOG_ERROR,
280 "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
281 return AVERROR_PATCHWELCOME;
283 case AVMEDIA_TYPE_VIDEO:
284 ffio_wfourcc(pb, "vids");
286 case AVMEDIA_TYPE_AUDIO:
287 ffio_wfourcc(pb, "auds");
289 // case AVMEDIA_TYPE_TEXT:
290 // ffio_wfourcc(pb, "txts");
292 case AVMEDIA_TYPE_DATA:
293 ffio_wfourcc(pb, "dats");
296 if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
297 enc->codec_id == AV_CODEC_ID_XSUB)
298 avio_wl32(pb, enc->codec_tag);
301 avio_wl32(pb, 0); /* flags */
302 avio_wl16(pb, 0); /* priority */
303 avio_wl16(pb, 0); /* language */
304 avio_wl32(pb, 0); /* initial frame */
306 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
308 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
309 && enc->codec_id != AV_CODEC_ID_XSUB
310 && au_byterate > 1000LL*au_scale) {
314 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
315 if (enc->codec_id == AV_CODEC_ID_XSUB)
316 au_scale = au_byterate = 0;
318 avio_wl32(pb, au_scale); /* scale */
319 avio_wl32(pb, au_byterate); /* rate */
321 avio_wl32(pb, 0); /* start */
322 /* remember this offset to fill later */
323 avist->frames_hdr_strm = avio_tell(pb);
325 /* FIXME: this may be broken, but who cares */
326 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
328 avio_wl32(pb, 0); /* length, XXX: filled later */
330 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
331 if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
332 avio_wl32(pb, 1024 * 1024);
333 else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
334 avio_wl32(pb, 12 * 1024);
337 avio_wl32(pb, -1); /* quality */
338 avio_wl32(pb, au_ssize); /* sample size */
340 avio_wl16(pb, enc->width);
341 avio_wl16(pb, enc->height);
342 ff_end_tag(pb, strh);
344 if (enc->codec_type != AVMEDIA_TYPE_DATA) {
346 enum AVPixelFormat pix_fmt;
348 strf = ff_start_tag(pb, "strf");
349 switch (enc->codec_type) {
350 case AVMEDIA_TYPE_SUBTITLE:
351 /* XSUB subtitles behave like video tracks, other subtitles
352 * are not (yet) supported. */
353 if (enc->codec_id != AV_CODEC_ID_XSUB)
355 case AVMEDIA_TYPE_VIDEO:
356 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
358 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
359 && enc->pix_fmt == AV_PIX_FMT_RGB555LE
360 && enc->bits_per_coded_sample == 15)
361 enc->bits_per_coded_sample = 16;
362 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
363 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
364 enc->bits_per_coded_sample);
366 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
367 && enc->pix_fmt != pix_fmt
368 && enc->pix_fmt != AV_PIX_FMT_NONE)
369 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
370 av_get_pix_fmt_name(enc->pix_fmt));
372 case AVMEDIA_TYPE_AUDIO:
373 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
374 if ((ret = ff_put_wav_header(pb, enc, flags)) < 0)
378 av_log(s, AV_LOG_ERROR,
379 "Invalid or not supported codec type '%s' found in the input\n",
380 (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
381 return AVERROR(EINVAL);
383 ff_end_tag(pb, strf);
384 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
385 ff_riff_write_info_tag(s->pb, "strn", t->value);
388 if (enc->codec_id == AV_CODEC_ID_XSUB
389 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
390 const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
393 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
395 return AVERROR(ENOMEM);
396 ff_riff_write_info_tag(s->pb, "strn", str);
403 write_odml_master(s, i);
406 if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
407 st->sample_aspect_ratio.num > 0 &&
408 st->sample_aspect_ratio.den > 0) {
409 int vprp = ff_start_tag(pb, "vprp");
410 AVRational dar = av_mul_q(st->sample_aspect_ratio,
411 (AVRational) { enc->width,
414 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
416 avio_wl32(pb, 0); // video format = unknown
417 avio_wl32(pb, 0); // video standard = unknown
418 // TODO: should be avg_frame_rate
419 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
420 avio_wl32(pb, enc->width);
421 avio_wl32(pb, enc->height);
424 avio_wl32(pb, enc->width);
425 avio_wl32(pb, enc->height);
426 avio_wl32(pb, 1); // progressive FIXME
428 avio_wl32(pb, enc->height);
429 avio_wl32(pb, enc->width);
430 avio_wl32(pb, enc->height);
431 avio_wl32(pb, enc->width);
437 ff_end_tag(pb, vprp);
440 ff_end_tag(pb, list2);
444 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
445 avi->odml_list = ff_start_tag(pb, "JUNK");
446 ffio_wfourcc(pb, "odml");
447 ffio_wfourcc(pb, "dmlh");
449 for (i = 0; i < 248; i += 4)
451 ff_end_tag(pb, avi->odml_list);
454 ff_end_tag(pb, list1);
456 ff_riff_write_info(s);
459 padding = s->metadata_header_padding;
463 /* some padding for easier tag editing */
465 list2 = ff_start_tag(pb, "JUNK");
466 for (i = padding; i > 0; i -= 4)
468 ff_end_tag(pb, list2);
471 avi->movi_list = ff_start_tag(pb, "LIST");
472 ffio_wfourcc(pb, "movi");
479 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
481 AVIOContext *pb = s->pb;
482 AVIContext *avi = s->priv_data;
483 AVIStream *avist = s->streams[stream_index]->priv_data;
485 int au_byterate, au_ssize, au_scale;
490 /* Updating one entry in the AVI OpenDML master index */
491 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
492 ffio_wfourcc(pb, "indx"); /* enabling this entry */
494 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
495 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
496 avio_wl64(pb, ix); /* qwOffset */
497 avio_wl32(pb, size); /* dwSize */
498 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
499 if (s->streams[stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
500 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
501 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
502 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
503 avist->sample_requested = 1;
505 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
507 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
509 avio_seek(pb, pos, SEEK_SET);
512 static int avi_write_ix(AVFormatContext *s)
514 AVIOContext *pb = s->pb;
515 AVIContext *avi = s->priv_data;
517 char ix_tag[] = "ix00";
520 av_assert0(pb->seekable);
522 for (i = 0; i < s->nb_streams; i++) {
523 AVIStream *avist = s->streams[i]->priv_data;
524 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == AVI_MASTER_INDEX_SIZE) {
526 int size = 8+2+1+1+4+8+4+4+16*AVI_MASTER_INDEX_SIZE;
529 update_odml_entry(s, i, pos, size);
530 write_odml_master(s, i);
531 av_assert1(avio_tell(pb) - pos == size);
532 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
534 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < AVI_MASTER_INDEX_SIZE);
537 for (i = 0; i < s->nb_streams; i++) {
538 AVIStream *avist = s->streams[i]->priv_data;
541 avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
544 /* Writing AVI OpenDML leaf index chunk */
546 ffio_wfourcc(pb, ix_tag); /* ix?? */
547 avio_wl32(pb, avist->indexes.entry * 8 + 24);
549 avio_wl16(pb, 2); /* wLongsPerEntry */
550 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
551 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
552 avio_wl32(pb, avist->indexes.entry);
554 ffio_wfourcc(pb, tag); /* dwChunkId */
555 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
556 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
558 for (j = 0; j < avist->indexes.entry; j++) {
559 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
560 avio_wl32(pb, ie->pos + 8);
561 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
562 (ie->flags & 0x10 ? 0 : 0x80000000));
565 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
570 static int avi_write_idx1(AVFormatContext *s)
572 AVIOContext *pb = s->pb;
573 AVIContext *avi = s->priv_data;
580 AVIIentry *ie = 0, *tie;
581 int empty, stream_id = -1;
583 idx_chunk = ff_start_tag(pb, "idx1");
584 for (i = 0; i < s->nb_streams; i++) {
585 avist = s->streams[i]->priv_data;
591 for (i = 0; i < s->nb_streams; i++) {
592 avist = s->streams[i]->priv_data;
593 if (avist->indexes.entry <= avist->entry)
596 tie = avi_get_ientry(&avist->indexes, avist->entry);
597 if (empty || tie->pos < ie->pos) {
604 avist = s->streams[stream_id]->priv_data;
605 avi_stream2fourcc(tag, stream_id,
606 s->streams[stream_id]->codec->codec_type);
607 ffio_wfourcc(pb, tag);
608 avio_wl32(pb, ie->flags);
609 avio_wl32(pb, ie->pos);
610 avio_wl32(pb, ie->len);
614 ff_end_tag(pb, idx_chunk);
616 avi_write_counters(s, avi->riff_id);
621 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
623 AVIStream *avist = s->streams[stream_index]->priv_data;
624 AVCodecContext *enc = s->streams[stream_index]->codec;
626 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
627 while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
628 dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
629 AVPacket empty_packet;
631 if (dts - avist->packet_count > 60000) {
632 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
633 return AVERROR(EINVAL);
636 av_init_packet(&empty_packet);
637 empty_packet.size = 0;
638 empty_packet.data = NULL;
639 empty_packet.stream_index = stream_index;
640 avi_write_packet(s, &empty_packet);
641 ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
647 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
649 unsigned char tag[5];
650 unsigned int flags = 0;
651 const int stream_index = pkt->stream_index;
652 int size = pkt->size;
653 AVIContext *avi = s->priv_data;
654 AVIOContext *pb = s->pb;
655 AVIStream *avist = s->streams[stream_index]->priv_data;
656 AVCodecContext *enc = s->streams[stream_index]->codec;
659 if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
660 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
665 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
668 if (pkt->dts != AV_NOPTS_VALUE)
669 avist->last_dts = pkt->dts + pkt->duration;
671 avist->packet_count++;
673 // Make sure to put an OpenDML chunk when the file size exceeds the limits
675 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
677 ff_end_tag(pb, avi->movi_list);
679 if (avi->riff_id == 1)
682 ff_end_tag(pb, avi->riff_start);
683 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
686 avi_stream2fourcc(tag, stream_index, enc->codec_type);
687 if (pkt->flags & AV_PKT_FLAG_KEY)
689 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
690 avist->audio_strm_length += size;
692 if (s->pb->seekable) {
693 AVIIndex *idx = &avist->indexes;
694 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
695 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
696 if (idx->ents_allocated <= idx->entry) {
697 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
699 idx->ents_allocated = 0;
701 return AVERROR(ENOMEM);
704 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
705 if (!idx->cluster[cl])
706 return AVERROR(ENOMEM);
707 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
710 idx->cluster[cl][id].flags = flags;
711 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
712 idx->cluster[cl][id].len = size;
713 avist->max_size = FFMAX(avist->max_size, size);
717 avio_write(pb, tag, 4);
719 avio_write(pb, pkt->data, size);
726 static int avi_write_trailer(AVFormatContext *s)
728 AVIContext *avi = s->priv_data;
729 AVIOContext *pb = s->pb;
731 int i, j, n, nb_frames;
734 for (i = 0; i < s->nb_streams; i++) {
735 AVIStream *avist = s->streams[i]->priv_data;
736 write_skip_frames(s, i, avist->last_dts);
740 if (avi->riff_id == 1) {
741 ff_end_tag(pb, avi->movi_list);
742 res = avi_write_idx1(s);
743 ff_end_tag(pb, avi->riff_start);
746 ff_end_tag(pb, avi->movi_list);
747 ff_end_tag(pb, avi->riff_start);
749 file_size = avio_tell(pb);
750 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
751 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
754 for (n = nb_frames = 0; n < s->nb_streams; n++) {
755 AVCodecContext *stream = s->streams[n]->codec;
756 AVIStream *avist = s->streams[n]->priv_data;
758 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
759 if (nb_frames < avist->packet_count)
760 nb_frames = avist->packet_count;
762 if (stream->codec_id == AV_CODEC_ID_MP2 ||
763 stream->codec_id == AV_CODEC_ID_MP3)
764 nb_frames += avist->packet_count;
767 avio_wl32(pb, nb_frames);
768 avio_seek(pb, file_size, SEEK_SET);
770 avi_write_counters(s, avi->riff_id);
774 for (i = 0; i < s->nb_streams; i++) {
775 AVIStream *avist = s->streams[i]->priv_data;
776 for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
777 av_freep(&avist->indexes.cluster[j]);
778 av_freep(&avist->indexes.cluster);
779 avist->indexes.ents_allocated = avist->indexes.entry = 0;
781 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
782 avio_wl32(pb, avist->max_size);
789 #define OFFSET(x) offsetof(AVIContext, x)
790 #define ENC AV_OPT_FLAG_ENCODING_PARAM
791 static const AVOption options[] = {
792 { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
796 static const AVClass avi_muxer_class = {
797 .class_name = "AVI muxer",
798 .item_name = av_default_item_name,
800 .version = LIBAVUTIL_VERSION_INT,
803 AVOutputFormat ff_avi_muxer = {
805 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
806 .mime_type = "video/x-msvideo",
808 .priv_data_size = sizeof(AVIContext),
809 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
810 .video_codec = AV_CODEC_ID_MPEG4,
811 .write_header = avi_write_header,
812 .write_packet = avi_write_packet,
813 .write_trailer = avi_write_trailer,
814 .codec_tag = (const AVCodecTag * const []) {
815 ff_codec_bmp_tags, ff_codec_wav_tags, 0
817 .priv_class = &avi_muxer_class,