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/intreadwrite.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/timestamp.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavcodec/raw.h"
41 * - fill all fields if non streamed (nb_frames for example)
44 typedef struct AVIIentry {
45 unsigned int flags, pos, len;
48 #define AVI_INDEX_CLUSTER_SIZE 16384
50 typedef struct AVIIndex {
58 int64_t riff_start, movi_list, odml_list;
59 int64_t frames_hdr_all;
64 int64_t frames_hdr_strm;
65 int64_t audio_strm_length;
73 static inline AVIIentry *avi_get_ientry(AVIIndex *idx, int ent_id)
75 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
76 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
77 return &idx->cluster[cl][id];
80 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
81 const char *riff_tag, const char *list_tag)
83 AVIContext *avi = s->priv_data;
88 for (i = 0; i < s->nb_streams; i++) {
89 AVIStream *avist = s->streams[i]->priv_data;
90 avist->indexes.entry = 0;
93 avi->riff_start = ff_start_tag(pb, "RIFF");
94 ffio_wfourcc(pb, riff_tag);
95 loff = ff_start_tag(pb, "LIST");
96 ffio_wfourcc(pb, list_tag);
100 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
102 tag[0] = '0' + index / 10;
103 tag[1] = '0' + index % 10;
104 if (type == AVMEDIA_TYPE_VIDEO) {
107 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
108 // note: this is not an official code
119 static int avi_write_counters(AVFormatContext *s, int riff_id)
121 AVIOContext *pb = s->pb;
122 AVIContext *avi = s->priv_data;
123 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
125 AVCodecContext *stream;
127 file_size = avio_tell(pb);
128 for (n = 0; n < s->nb_streams; n++) {
129 AVIStream *avist = s->streams[n]->priv_data;
131 av_assert0(avist->frames_hdr_strm);
132 stream = s->streams[n]->codec;
133 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
134 ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
136 avio_wl32(pb, avist->packet_count);
138 avio_wl32(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 av_assert0(avi->frames_hdr_all);
144 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
145 avio_wl32(pb, nb_frames);
147 avio_seek(pb, file_size, SEEK_SET);
152 static int avi_write_header(AVFormatContext *s)
154 AVIContext *avi = s->priv_data;
155 AVIOContext *pb = s->pb;
156 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
157 AVCodecContext *video_enc;
158 int64_t list1, list2, strh, strf;
159 AVDictionaryEntry *t = NULL;
162 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
163 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
164 AVI_MAX_STREAM_COUNT);
165 return AVERROR(EINVAL);
168 for (n = 0; n < s->nb_streams; n++) {
169 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
170 if (!s->streams[n]->priv_data)
171 return AVERROR(ENOMEM);
176 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
179 ffio_wfourcc(pb, "avih");
180 avio_wl32(pb, 14 * 4);
184 for (n = 0; n < s->nb_streams; n++) {
185 AVCodecContext *codec = s->streams[n]->codec;
186 bitrate += codec->bit_rate;
187 if (codec->codec_type == AVMEDIA_TYPE_VIDEO)
194 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_enc->time_base.num /
195 video_enc->time_base.den));
198 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
199 avio_wl32(pb, 0); /* padding */
201 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
203 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
204 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
205 avio_wl32(pb, nb_frames); /* nb frames, filled later */
206 avio_wl32(pb, 0); /* initial frame */
207 avio_wl32(pb, s->nb_streams); /* nb streams */
208 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
210 avio_wl32(pb, video_enc->width);
211 avio_wl32(pb, video_enc->height);
216 avio_wl32(pb, 0); /* reserved */
217 avio_wl32(pb, 0); /* reserved */
218 avio_wl32(pb, 0); /* reserved */
219 avio_wl32(pb, 0); /* reserved */
222 for (i = 0; i < n; i++) {
223 AVStream *st = s->streams[i];
224 AVCodecContext *enc = st->codec;
225 AVIStream *avist = st->priv_data;
226 list2 = ff_start_tag(pb, "LIST");
227 ffio_wfourcc(pb, "strl");
229 /* stream generic header */
230 strh = ff_start_tag(pb, "strh");
231 switch (enc->codec_type) {
232 case AVMEDIA_TYPE_SUBTITLE:
233 // XSUB subtitles behave like video tracks, other subtitles
234 // are not (yet) supported.
235 if (enc->codec_id != AV_CODEC_ID_XSUB) {
236 av_log(s, AV_LOG_ERROR,
237 "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
238 return AVERROR_PATCHWELCOME;
240 case AVMEDIA_TYPE_VIDEO:
241 ffio_wfourcc(pb, "vids");
243 case AVMEDIA_TYPE_AUDIO:
244 ffio_wfourcc(pb, "auds");
246 // case AVMEDIA_TYPE_TEXT:
247 // ffio_wfourcc(pb, "txts");
249 case AVMEDIA_TYPE_DATA:
250 ffio_wfourcc(pb, "dats");
253 if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
254 enc->codec_id == AV_CODEC_ID_XSUB)
255 avio_wl32(pb, enc->codec_tag);
258 avio_wl32(pb, 0); /* flags */
259 avio_wl16(pb, 0); /* priority */
260 avio_wl16(pb, 0); /* language */
261 avio_wl32(pb, 0); /* initial frame */
263 ff_parse_specific_params(enc, &au_byterate, &au_ssize, &au_scale);
265 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
266 && enc->codec_id != AV_CODEC_ID_XSUB
267 && au_byterate > 1000LL*au_scale) {
271 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
272 if (enc->codec_id == AV_CODEC_ID_XSUB)
273 au_scale = au_byterate = 0;
275 avio_wl32(pb, au_scale); /* scale */
276 avio_wl32(pb, au_byterate); /* rate */
278 avio_wl32(pb, 0); /* start */
279 /* remember this offset to fill later */
280 avist->frames_hdr_strm = avio_tell(pb);
282 /* FIXME: this may be broken, but who cares */
283 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
285 avio_wl32(pb, 0); /* length, XXX: filled later */
287 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
288 if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
289 avio_wl32(pb, 1024 * 1024);
290 else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
291 avio_wl32(pb, 12 * 1024);
294 avio_wl32(pb, -1); /* quality */
295 avio_wl32(pb, au_ssize); /* sample size */
297 avio_wl16(pb, enc->width);
298 avio_wl16(pb, enc->height);
299 ff_end_tag(pb, strh);
301 if (enc->codec_type != AVMEDIA_TYPE_DATA) {
303 enum AVPixelFormat pix_fmt;
305 strf = ff_start_tag(pb, "strf");
306 switch (enc->codec_type) {
307 case AVMEDIA_TYPE_SUBTITLE:
308 /* XSUB subtitles behave like video tracks, other subtitles
309 * are not (yet) supported. */
310 if (enc->codec_id != AV_CODEC_ID_XSUB)
312 case AVMEDIA_TYPE_VIDEO:
313 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
315 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
316 && enc->pix_fmt == AV_PIX_FMT_RGB555LE
317 && enc->bits_per_coded_sample == 15)
318 enc->bits_per_coded_sample = 16;
319 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
320 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
321 enc->bits_per_coded_sample);
323 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
324 && enc->pix_fmt != pix_fmt
325 && enc->pix_fmt != AV_PIX_FMT_NONE)
326 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
327 av_get_pix_fmt_name(enc->pix_fmt));
329 case AVMEDIA_TYPE_AUDIO:
330 if ((ret = ff_put_wav_header(pb, enc, 0)) < 0)
334 av_log(s, AV_LOG_ERROR,
335 "Invalid or not supported codec type '%s' found in the input\n",
336 (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
337 return AVERROR(EINVAL);
339 ff_end_tag(pb, strf);
340 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
341 ff_riff_write_info_tag(s->pb, "strn", t->value);
344 if (enc->codec_id == AV_CODEC_ID_XSUB
345 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
346 const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
349 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
350 ff_riff_write_info_tag(s->pb, "strn", str);
357 unsigned char tag[5];
360 /* Starting to lay out AVI OpenDML master index.
361 * We want to make it JUNK entry for now, since we'd
362 * like to get away without making AVI an OpenDML one
363 * for compatibility reasons. */
364 avist->indexes.entry = avist->indexes.ents_allocated = 0;
365 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
366 avio_wl16(pb, 4); /* wLongsPerEntry */
367 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
368 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
369 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
370 ffio_wfourcc(pb, avi_stream2fourcc(tag, i, enc->codec_type));
372 avio_wl64(pb, 0); /* dwReserved[3] */
373 // avio_wl32(pb, 0); /* Must be 0. */
374 for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
376 ff_end_tag(pb, avist->indexes.indx_start);
379 if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
380 st->sample_aspect_ratio.num > 0 &&
381 st->sample_aspect_ratio.den > 0) {
382 int vprp = ff_start_tag(pb, "vprp");
383 AVRational dar = av_mul_q(st->sample_aspect_ratio,
384 (AVRational) { enc->width,
387 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
389 avio_wl32(pb, 0); // video format = unknown
390 avio_wl32(pb, 0); // video standard = unknown
391 avio_wl32(pb, lrintf(1.0 / av_q2d(enc->time_base)));
392 avio_wl32(pb, enc->width);
393 avio_wl32(pb, enc->height);
396 avio_wl32(pb, enc->width);
397 avio_wl32(pb, enc->height);
398 avio_wl32(pb, 1); // progressive FIXME
400 avio_wl32(pb, enc->height);
401 avio_wl32(pb, enc->width);
402 avio_wl32(pb, enc->height);
403 avio_wl32(pb, enc->width);
409 ff_end_tag(pb, vprp);
412 ff_end_tag(pb, list2);
416 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
417 avi->odml_list = ff_start_tag(pb, "JUNK");
418 ffio_wfourcc(pb, "odml");
419 ffio_wfourcc(pb, "dmlh");
421 for (i = 0; i < 248; i += 4)
423 ff_end_tag(pb, avi->odml_list);
426 ff_end_tag(pb, list1);
428 ff_riff_write_info(s);
431 padding = s->metadata_header_padding;
435 /* some padding for easier tag editing */
437 list2 = ff_start_tag(pb, "JUNK");
438 for (i = padding; i > 0; i -= 4)
440 ff_end_tag(pb, list2);
443 avi->movi_list = ff_start_tag(pb, "LIST");
444 ffio_wfourcc(pb, "movi");
451 static int avi_write_ix(AVFormatContext *s)
453 AVIOContext *pb = s->pb;
454 AVIContext *avi = s->priv_data;
456 char ix_tag[] = "ix00";
459 av_assert0(pb->seekable);
461 if (avi->riff_id > AVI_MASTER_INDEX_SIZE) {
462 av_log(s, AV_LOG_ERROR, "Invalid riff index %d > %d\n",
463 avi->riff_id, AVI_MASTER_INDEX_SIZE);
464 return AVERROR(EINVAL);
467 for (i = 0; i < s->nb_streams; i++) {
468 AVIStream *avist = s->streams[i]->priv_data;
471 avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
474 /* Writing AVI OpenDML leaf index chunk */
476 ffio_wfourcc(pb, ix_tag); /* ix?? */
477 avio_wl32(pb, avist->indexes.entry * 8 + 24);
479 avio_wl16(pb, 2); /* wLongsPerEntry */
480 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
481 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
482 avio_wl32(pb, avist->indexes.entry);
484 ffio_wfourcc(pb, tag); /* dwChunkId */
485 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
486 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
488 for (j = 0; j < avist->indexes.entry; j++) {
489 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
490 avio_wl32(pb, ie->pos + 8);
491 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
492 (ie->flags & 0x10 ? 0 : 0x80000000));
497 /* Updating one entry in the AVI OpenDML master index */
498 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
499 ffio_wfourcc(pb, "indx"); /* enabling this entry */
501 avio_wl32(pb, avi->riff_id); /* nEntriesInUse */
502 avio_skip(pb, 16 * avi->riff_id);
503 avio_wl64(pb, ix); /* qwOffset */
504 avio_wl32(pb, pos - ix); /* dwSize */
505 avio_wl32(pb, avist->indexes.entry); /* dwDuration */
507 avio_seek(pb, pos, SEEK_SET);
512 static int avi_write_idx1(AVFormatContext *s)
514 AVIOContext *pb = s->pb;
515 AVIContext *avi = s->priv_data;
522 AVIIentry *ie = 0, *tie;
523 int empty, stream_id = -1;
525 idx_chunk = ff_start_tag(pb, "idx1");
526 for (i = 0; i < s->nb_streams; i++) {
527 avist = s->streams[i]->priv_data;
533 for (i = 0; i < s->nb_streams; i++) {
534 avist = s->streams[i]->priv_data;
535 if (avist->indexes.entry <= avist->entry)
538 tie = avi_get_ientry(&avist->indexes, avist->entry);
539 if (empty || tie->pos < ie->pos) {
546 avist = s->streams[stream_id]->priv_data;
547 avi_stream2fourcc(tag, stream_id,
548 s->streams[stream_id]->codec->codec_type);
549 ffio_wfourcc(pb, tag);
550 avio_wl32(pb, ie->flags);
551 avio_wl32(pb, ie->pos);
552 avio_wl32(pb, ie->len);
556 ff_end_tag(pb, idx_chunk);
558 avi_write_counters(s, avi->riff_id);
563 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
565 unsigned char tag[5];
566 unsigned int flags = 0;
567 const int stream_index = pkt->stream_index;
568 int size = pkt->size;
569 AVIContext *avi = s->priv_data;
570 AVIOContext *pb = s->pb;
571 AVIStream *avist = s->streams[stream_index]->priv_data;
572 AVCodecContext *enc = s->streams[stream_index]->codec;
574 if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4')) {
575 int ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
579 av_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(pkt->dts), avist->packet_count, stream_index);
580 while (enc->block_align == 0 && pkt->dts != AV_NOPTS_VALUE &&
581 pkt->dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
582 AVPacket empty_packet;
584 if (pkt->dts - avist->packet_count > 60000) {
585 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", pkt->dts - avist->packet_count);
586 return AVERROR(EINVAL);
589 av_init_packet(&empty_packet);
590 empty_packet.size = 0;
591 empty_packet.data = NULL;
592 empty_packet.stream_index = stream_index;
593 avi_write_packet(s, &empty_packet);
594 av_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(pkt->dts), avist->packet_count);
596 avist->packet_count++;
598 // Make sure to put an OpenDML chunk when the file size exceeds the limits
600 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
602 ff_end_tag(pb, avi->movi_list);
604 if (avi->riff_id == 1)
607 ff_end_tag(pb, avi->riff_start);
608 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
611 avi_stream2fourcc(tag, stream_index, enc->codec_type);
612 if (pkt->flags & AV_PKT_FLAG_KEY)
614 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
615 avist->audio_strm_length += size;
617 if (s->pb->seekable) {
618 AVIIndex *idx = &avist->indexes;
619 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
620 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
621 if (idx->ents_allocated <= idx->entry) {
622 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
624 idx->ents_allocated = 0;
626 return AVERROR(ENOMEM);
629 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
630 if (!idx->cluster[cl])
631 return AVERROR(ENOMEM);
632 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
635 idx->cluster[cl][id].flags = flags;
636 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
637 idx->cluster[cl][id].len = size;
638 avist->max_size = FFMAX(avist->max_size, size);
642 avio_write(pb, tag, 4);
644 avio_write(pb, pkt->data, size);
651 static int avi_write_trailer(AVFormatContext *s)
653 AVIContext *avi = s->priv_data;
654 AVIOContext *pb = s->pb;
656 int i, j, n, nb_frames;
660 if (avi->riff_id == 1) {
661 ff_end_tag(pb, avi->movi_list);
662 res = avi_write_idx1(s);
663 ff_end_tag(pb, avi->riff_start);
666 ff_end_tag(pb, avi->movi_list);
667 ff_end_tag(pb, avi->riff_start);
669 file_size = avio_tell(pb);
670 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
671 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
674 for (n = nb_frames = 0; n < s->nb_streams; n++) {
675 AVCodecContext *stream = s->streams[n]->codec;
676 AVIStream *avist = s->streams[n]->priv_data;
678 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
679 if (nb_frames < avist->packet_count)
680 nb_frames = avist->packet_count;
682 if (stream->codec_id == AV_CODEC_ID_MP2 ||
683 stream->codec_id == AV_CODEC_ID_MP3)
684 nb_frames += avist->packet_count;
687 avio_wl32(pb, nb_frames);
688 avio_seek(pb, file_size, SEEK_SET);
690 avi_write_counters(s, avi->riff_id);
694 for (i = 0; i < s->nb_streams; i++) {
695 AVIStream *avist = s->streams[i]->priv_data;
696 for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
697 av_freep(&avist->indexes.cluster[j]);
698 av_freep(&avist->indexes.cluster);
699 avist->indexes.ents_allocated = avist->indexes.entry = 0;
701 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
702 avio_wl32(pb, avist->max_size);
709 AVOutputFormat ff_avi_muxer = {
711 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
712 .mime_type = "video/x-msvideo",
714 .priv_data_size = sizeof(AVIContext),
715 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
716 .video_codec = AV_CODEC_ID_MPEG4,
717 .write_header = avi_write_header,
718 .write_packet = avi_write_packet,
719 .write_trailer = avi_write_trailer,
720 .codec_tag = (const AVCodecTag * const []) {
721 ff_codec_bmp_tags, ff_codec_wav_tags, 0