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;
85 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
87 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
89 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
90 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
91 return &idx->cluster[cl][id];
94 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
95 const char *riff_tag, const char *list_tag)
97 AVIContext *avi = s->priv_data;
102 for (i = 0; i < s->nb_streams; i++) {
103 AVIStream *avist = s->streams[i]->priv_data;
104 avist->indexes.audio_strm_offset = avist->audio_strm_length;
105 avist->indexes.entry = 0;
108 avi->riff_start = ff_start_tag(pb, "RIFF");
109 ffio_wfourcc(pb, riff_tag);
110 loff = ff_start_tag(pb, "LIST");
111 ffio_wfourcc(pb, list_tag);
115 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
117 tag[0] = '0' + index / 10;
118 tag[1] = '0' + index % 10;
119 if (type == AVMEDIA_TYPE_VIDEO) {
122 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
123 // note: this is not an official code
134 static int avi_write_counters(AVFormatContext *s, int riff_id)
136 AVIOContext *pb = s->pb;
137 AVIContext *avi = s->priv_data;
138 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
140 AVCodecContext *stream;
142 file_size = avio_tell(pb);
143 for (n = 0; n < s->nb_streams; n++) {
144 AVIStream *avist = s->streams[n]->priv_data;
146 av_assert0(avist->frames_hdr_strm);
147 stream = s->streams[n]->codec;
148 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
149 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
151 avio_wl32(pb, avist->packet_count);
153 avio_wl32(pb, avist->audio_strm_length / au_ssize);
154 if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
155 nb_frames = FFMAX(nb_frames, avist->packet_count);
158 av_assert0(avi->frames_hdr_all);
159 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
160 avio_wl32(pb, nb_frames);
162 avio_seek(pb, file_size, SEEK_SET);
167 static void write_odml_master(AVFormatContext *s, int stream_index)
169 AVIOContext *pb = s->pb;
170 AVStream *st = s->streams[stream_index];
171 AVCodecContext *enc = st->codec;
172 AVIStream *avist = st->priv_data;
173 unsigned char tag[5];
176 /* Starting to lay out AVI OpenDML master index.
177 * We want to make it JUNK entry for now, since we'd
178 * like to get away without making AVI an OpenDML one
179 * for compatibility reasons. */
180 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
181 avio_wl16(pb, 4); /* wLongsPerEntry */
182 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
183 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
184 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
185 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
187 avio_wl64(pb, 0); /* dwReserved[3] */
188 avio_wl32(pb, 0); /* Must be 0. */
189 for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
191 ff_end_tag(pb, avist->indexes.indx_start);
194 static int avi_write_header(AVFormatContext *s)
196 AVIContext *avi = s->priv_data;
197 AVIOContext *pb = s->pb;
198 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
199 AVCodecContext *video_enc;
200 AVStream *video_st = NULL;
201 int64_t list1, list2, strh, strf;
202 AVDictionaryEntry *t = NULL;
205 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
206 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
207 AVI_MAX_STREAM_COUNT);
208 return AVERROR(EINVAL);
211 for (n = 0; n < s->nb_streams; n++) {
212 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
213 if (!s->streams[n]->priv_data)
214 return AVERROR(ENOMEM);
219 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
222 ffio_wfourcc(pb, "avih");
223 avio_wl32(pb, 14 * 4);
227 for (n = 0; n < s->nb_streams; n++) {
228 AVCodecContext *codec = s->streams[n]->codec;
229 bitrate += codec->bit_rate;
230 if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
232 video_st = s->streams[n];
238 // TODO: should be avg_frame_rate
240 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
241 video_st->time_base.den));
244 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
245 avio_wl32(pb, 0); /* padding */
247 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
249 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
250 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
251 avio_wl32(pb, nb_frames); /* nb frames, filled later */
252 avio_wl32(pb, 0); /* initial frame */
253 avio_wl32(pb, s->nb_streams); /* nb streams */
254 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
256 avio_wl32(pb, video_enc->width);
257 avio_wl32(pb, video_enc->height);
262 avio_wl32(pb, 0); /* reserved */
263 avio_wl32(pb, 0); /* reserved */
264 avio_wl32(pb, 0); /* reserved */
265 avio_wl32(pb, 0); /* reserved */
268 for (i = 0; i < n; i++) {
269 AVStream *st = s->streams[i];
270 AVCodecContext *enc = st->codec;
271 AVIStream *avist = st->priv_data;
272 list2 = ff_start_tag(pb, "LIST");
273 ffio_wfourcc(pb, "strl");
275 /* stream generic header */
276 strh = ff_start_tag(pb, "strh");
277 switch (enc->codec_type) {
278 case AVMEDIA_TYPE_SUBTITLE:
279 // XSUB subtitles behave like video tracks, other subtitles
280 // are not (yet) supported.
281 if (enc->codec_id != AV_CODEC_ID_XSUB) {
282 av_log(s, AV_LOG_ERROR,
283 "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
284 return AVERROR_PATCHWELCOME;
286 case AVMEDIA_TYPE_VIDEO:
287 ffio_wfourcc(pb, "vids");
289 case AVMEDIA_TYPE_AUDIO:
290 ffio_wfourcc(pb, "auds");
292 // case AVMEDIA_TYPE_TEXT:
293 // ffio_wfourcc(pb, "txts");
295 case AVMEDIA_TYPE_DATA:
296 ffio_wfourcc(pb, "dats");
299 if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
300 enc->codec_id == AV_CODEC_ID_XSUB)
301 avio_wl32(pb, enc->codec_tag);
304 avio_wl32(pb, 0); /* flags */
305 avio_wl16(pb, 0); /* priority */
306 avio_wl16(pb, 0); /* language */
307 avio_wl32(pb, 0); /* initial frame */
309 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
311 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
312 && enc->codec_id != AV_CODEC_ID_XSUB
313 && au_byterate > 1000LL*au_scale) {
317 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
318 if (enc->codec_id == AV_CODEC_ID_XSUB)
319 au_scale = au_byterate = 0;
321 avio_wl32(pb, au_scale); /* scale */
322 avio_wl32(pb, au_byterate); /* rate */
324 avio_wl32(pb, 0); /* start */
325 /* remember this offset to fill later */
326 avist->frames_hdr_strm = avio_tell(pb);
328 /* FIXME: this may be broken, but who cares */
329 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
331 avio_wl32(pb, 0); /* length, XXX: filled later */
333 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
334 if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
335 avio_wl32(pb, 1024 * 1024);
336 else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
337 avio_wl32(pb, 12 * 1024);
340 avio_wl32(pb, -1); /* quality */
341 avio_wl32(pb, au_ssize); /* sample size */
343 avio_wl16(pb, enc->width);
344 avio_wl16(pb, enc->height);
345 ff_end_tag(pb, strh);
347 if (enc->codec_type != AVMEDIA_TYPE_DATA) {
349 enum AVPixelFormat pix_fmt;
351 strf = ff_start_tag(pb, "strf");
352 switch (enc->codec_type) {
353 case AVMEDIA_TYPE_SUBTITLE:
354 /* XSUB subtitles behave like video tracks, other subtitles
355 * are not (yet) supported. */
356 if (enc->codec_id != AV_CODEC_ID_XSUB)
358 case AVMEDIA_TYPE_VIDEO:
359 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
361 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
362 && enc->pix_fmt == AV_PIX_FMT_RGB555LE
363 && enc->bits_per_coded_sample == 15)
364 enc->bits_per_coded_sample = 16;
365 avist->pal_offset = avio_tell(pb) + 40;
366 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
367 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
368 enc->bits_per_coded_sample);
370 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
371 && enc->pix_fmt != pix_fmt
372 && enc->pix_fmt != AV_PIX_FMT_NONE)
373 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
374 av_get_pix_fmt_name(enc->pix_fmt));
376 case AVMEDIA_TYPE_AUDIO:
377 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
378 if ((ret = ff_put_wav_header(pb, enc, flags)) < 0)
382 av_log(s, AV_LOG_ERROR,
383 "Invalid or not supported codec type '%s' found in the input\n",
384 (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
385 return AVERROR(EINVAL);
387 ff_end_tag(pb, strf);
388 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
389 ff_riff_write_info_tag(s->pb, "strn", t->value);
392 if (enc->codec_id == AV_CODEC_ID_XSUB
393 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
394 const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
397 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
399 return AVERROR(ENOMEM);
400 ff_riff_write_info_tag(s->pb, "strn", str);
407 write_odml_master(s, i);
410 if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
411 st->sample_aspect_ratio.num > 0 &&
412 st->sample_aspect_ratio.den > 0) {
413 int vprp = ff_start_tag(pb, "vprp");
414 AVRational dar = av_mul_q(st->sample_aspect_ratio,
415 (AVRational) { enc->width,
418 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
420 avio_wl32(pb, 0); // video format = unknown
421 avio_wl32(pb, 0); // video standard = unknown
422 // TODO: should be avg_frame_rate
423 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
424 avio_wl32(pb, enc->width);
425 avio_wl32(pb, enc->height);
428 avio_wl32(pb, enc->width);
429 avio_wl32(pb, enc->height);
430 avio_wl32(pb, 1); // progressive FIXME
432 avio_wl32(pb, enc->height);
433 avio_wl32(pb, enc->width);
434 avio_wl32(pb, enc->height);
435 avio_wl32(pb, enc->width);
441 ff_end_tag(pb, vprp);
444 ff_end_tag(pb, list2);
448 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
449 avi->odml_list = ff_start_tag(pb, "JUNK");
450 ffio_wfourcc(pb, "odml");
451 ffio_wfourcc(pb, "dmlh");
453 for (i = 0; i < 248; i += 4)
455 ff_end_tag(pb, avi->odml_list);
458 ff_end_tag(pb, list1);
460 ff_riff_write_info(s);
463 padding = s->metadata_header_padding;
467 /* some padding for easier tag editing */
469 list2 = ff_start_tag(pb, "JUNK");
470 for (i = padding; i > 0; i -= 4)
472 ff_end_tag(pb, list2);
475 avi->movi_list = ff_start_tag(pb, "LIST");
476 ffio_wfourcc(pb, "movi");
483 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
485 AVIOContext *pb = s->pb;
486 AVIContext *avi = s->priv_data;
487 AVIStream *avist = s->streams[stream_index]->priv_data;
489 int au_byterate, au_ssize, au_scale;
494 /* Updating one entry in the AVI OpenDML master index */
495 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
496 ffio_wfourcc(pb, "indx"); /* enabling this entry */
498 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
499 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
500 avio_wl64(pb, ix); /* qwOffset */
501 avio_wl32(pb, size); /* dwSize */
502 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
503 if (s->streams[stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
504 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
505 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
506 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
507 avist->sample_requested = 1;
509 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
511 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
513 avio_seek(pb, pos, SEEK_SET);
516 static int avi_write_ix(AVFormatContext *s)
518 AVIOContext *pb = s->pb;
519 AVIContext *avi = s->priv_data;
521 char ix_tag[] = "ix00";
524 av_assert0(pb->seekable);
526 for (i = 0; i < s->nb_streams; i++) {
527 AVIStream *avist = s->streams[i]->priv_data;
528 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == AVI_MASTER_INDEX_SIZE) {
530 int size = 8+2+1+1+4+8+4+4+16*AVI_MASTER_INDEX_SIZE;
533 update_odml_entry(s, i, pos, size);
534 write_odml_master(s, i);
535 av_assert1(avio_tell(pb) - pos == size);
536 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
538 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < AVI_MASTER_INDEX_SIZE);
541 for (i = 0; i < s->nb_streams; i++) {
542 AVIStream *avist = s->streams[i]->priv_data;
545 avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
548 /* Writing AVI OpenDML leaf index chunk */
550 ffio_wfourcc(pb, ix_tag); /* ix?? */
551 avio_wl32(pb, avist->indexes.entry * 8 + 24);
553 avio_wl16(pb, 2); /* wLongsPerEntry */
554 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
555 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
556 avio_wl32(pb, avist->indexes.entry);
558 ffio_wfourcc(pb, tag); /* dwChunkId */
559 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
560 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
562 for (j = 0; j < avist->indexes.entry; j++) {
563 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
564 avio_wl32(pb, ie->pos + 8);
565 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
566 (ie->flags & 0x10 ? 0 : 0x80000000));
569 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
574 static int avi_write_idx1(AVFormatContext *s)
576 AVIOContext *pb = s->pb;
577 AVIContext *avi = s->priv_data;
584 AVIIentry *ie = 0, *tie;
585 int empty, stream_id = -1;
587 idx_chunk = ff_start_tag(pb, "idx1");
588 for (i = 0; i < s->nb_streams; i++) {
589 avist = s->streams[i]->priv_data;
595 for (i = 0; i < s->nb_streams; i++) {
596 avist = s->streams[i]->priv_data;
597 if (avist->indexes.entry <= avist->entry)
600 tie = avi_get_ientry(&avist->indexes, avist->entry);
601 if (empty || tie->pos < ie->pos) {
608 avist = s->streams[stream_id]->priv_data;
609 avi_stream2fourcc(tag, stream_id,
610 s->streams[stream_id]->codec->codec_type);
611 ffio_wfourcc(pb, tag);
612 avio_wl32(pb, ie->flags);
613 avio_wl32(pb, ie->pos);
614 avio_wl32(pb, ie->len);
618 ff_end_tag(pb, idx_chunk);
620 avi_write_counters(s, avi->riff_id);
625 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
627 AVIStream *avist = s->streams[stream_index]->priv_data;
628 AVCodecContext *enc = s->streams[stream_index]->codec;
630 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
631 while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
632 dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
633 AVPacket empty_packet;
635 if (dts - avist->packet_count > 60000) {
636 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
637 return AVERROR(EINVAL);
640 av_init_packet(&empty_packet);
641 empty_packet.size = 0;
642 empty_packet.data = NULL;
643 empty_packet.stream_index = stream_index;
644 avi_write_packet_internal(s, &empty_packet);
645 ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
651 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
653 unsigned char tag[5];
654 const int stream_index = pkt->stream_index;
655 const uint8_t *data = pkt->data;
656 int size = pkt->size;
657 AVIOContext *pb = s->pb;
658 AVCodecContext *enc = s->streams[stream_index]->codec;
659 AVIStream *avist = s->streams[stream_index]->priv_data;
662 if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
663 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
668 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
671 if (enc->codec_id == AV_CODEC_ID_RAWVIDEO && enc->codec_tag == 0) {
672 int64_t bpc = enc->bits_per_coded_sample != 15 ? enc->bits_per_coded_sample : 16;
673 int expected_stride = ((enc->width * bpc + 31) >> 5)*4;
675 ret = ff_reshuffle_raw_rgb(s, &pkt, enc, expected_stride);
679 if (ret == CONTAINS_PAL) {
681 int pal_size = 1 << enc->bits_per_coded_sample;
682 if (!avist->hdr_pal_done) {
683 int64_t cur_offset = avio_tell(pb);
684 avio_seek(pb, avist->pal_offset, SEEK_SET);
685 for (i = 0; i < pal_size; i++) {
686 uint32_t v = AV_RL32(data + size - 4*pal_size + 4*i);
687 avio_wl32(pb, v & 0xffffff);
689 avio_seek(pb, cur_offset, SEEK_SET);
690 avist->hdr_pal_done++;
692 avi_stream2fourcc(tag, stream_index, enc->codec_type);
693 tag[2] = 'p'; tag[3] = 'c';
694 pc_tag = ff_start_tag(pb, tag);
696 avio_w8(pb, pal_size & 0xFF);
697 avio_wl16(pb, 0); // reserved
698 for (i = 0; i < pal_size; i++) {
699 uint32_t v = AV_RL32(data + size - 4*pal_size + 4*i);
702 ff_end_tag(pb, pc_tag);
704 ret = avi_write_packet_internal(s, pkt);
705 av_packet_free(&pkt);
710 return avi_write_packet_internal(s, pkt);
713 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
715 unsigned char tag[5];
716 unsigned int flags = 0;
717 const int stream_index = pkt->stream_index;
718 int size = pkt->size;
719 AVIContext *avi = s->priv_data;
720 AVIOContext *pb = s->pb;
721 AVIStream *avist = s->streams[stream_index]->priv_data;
722 AVCodecContext *enc = s->streams[stream_index]->codec;
724 if (pkt->dts != AV_NOPTS_VALUE)
725 avist->last_dts = pkt->dts + pkt->duration;
727 avist->packet_count++;
729 // Make sure to put an OpenDML chunk when the file size exceeds the limits
731 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
733 ff_end_tag(pb, avi->movi_list);
735 if (avi->riff_id == 1)
738 ff_end_tag(pb, avi->riff_start);
739 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
742 avi_stream2fourcc(tag, stream_index, enc->codec_type);
743 if (pkt->flags & AV_PKT_FLAG_KEY)
745 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
746 avist->audio_strm_length += size;
748 if (s->pb->seekable) {
749 AVIIndex *idx = &avist->indexes;
750 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
751 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
752 if (idx->ents_allocated <= idx->entry) {
753 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
755 idx->ents_allocated = 0;
757 return AVERROR(ENOMEM);
760 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
761 if (!idx->cluster[cl])
762 return AVERROR(ENOMEM);
763 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
766 idx->cluster[cl][id].flags = flags;
767 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
768 idx->cluster[cl][id].len = size;
769 avist->max_size = FFMAX(avist->max_size, size);
773 avio_write(pb, tag, 4);
775 avio_write(pb, pkt->data, size);
782 static int avi_write_trailer(AVFormatContext *s)
784 AVIContext *avi = s->priv_data;
785 AVIOContext *pb = s->pb;
787 int i, j, n, nb_frames;
790 for (i = 0; i < s->nb_streams; i++) {
791 AVIStream *avist = s->streams[i]->priv_data;
792 write_skip_frames(s, i, avist->last_dts);
796 if (avi->riff_id == 1) {
797 ff_end_tag(pb, avi->movi_list);
798 res = avi_write_idx1(s);
799 ff_end_tag(pb, avi->riff_start);
802 ff_end_tag(pb, avi->movi_list);
803 ff_end_tag(pb, avi->riff_start);
805 file_size = avio_tell(pb);
806 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
807 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
810 for (n = nb_frames = 0; n < s->nb_streams; n++) {
811 AVCodecContext *stream = s->streams[n]->codec;
812 AVIStream *avist = s->streams[n]->priv_data;
814 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
815 if (nb_frames < avist->packet_count)
816 nb_frames = avist->packet_count;
818 if (stream->codec_id == AV_CODEC_ID_MP2 ||
819 stream->codec_id == AV_CODEC_ID_MP3)
820 nb_frames += avist->packet_count;
823 avio_wl32(pb, nb_frames);
824 avio_seek(pb, file_size, SEEK_SET);
826 avi_write_counters(s, avi->riff_id);
830 for (i = 0; i < s->nb_streams; i++) {
831 AVIStream *avist = s->streams[i]->priv_data;
832 for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
833 av_freep(&avist->indexes.cluster[j]);
834 av_freep(&avist->indexes.cluster);
835 avist->indexes.ents_allocated = avist->indexes.entry = 0;
837 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
838 avio_wl32(pb, avist->max_size);
845 #define OFFSET(x) offsetof(AVIContext, x)
846 #define ENC AV_OPT_FLAG_ENCODING_PARAM
847 static const AVOption options[] = {
848 { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
852 static const AVClass avi_muxer_class = {
853 .class_name = "AVI muxer",
854 .item_name = av_default_item_name,
856 .version = LIBAVUTIL_VERSION_INT,
859 AVOutputFormat ff_avi_muxer = {
861 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
862 .mime_type = "video/x-msvideo",
864 .priv_data_size = sizeof(AVIContext),
865 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
866 .video_codec = AV_CODEC_ID_MPEG4,
867 .write_header = avi_write_header,
868 .write_packet = avi_write_packet,
869 .write_trailer = avi_write_trailer,
870 .codec_tag = (const AVCodecTag * const []) {
871 ff_codec_bmp_tags, ff_codec_wav_tags, 0
873 .priv_class = &avi_muxer_class,