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/avutil.h"
33 #include "libavutil/internal.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 {
53 #define AVI_INDEX_CLUSTER_SIZE 16384
54 #define AVI_MASTER_INDEX_PREFIX_SIZE (8+2+1+1+4+8+4+4)
55 #define AVI_MASTER_INDEX_ENTRY_SIZE 16 /* bytes per entry */
56 #define AVI_MASTER_INDEX_SIZE_DEFAULT 256 /* number of entries */
58 typedef struct AVIIndex {
60 int64_t audio_strm_offset;
63 int master_odml_riff_id_base;
67 typedef struct AVIContext {
69 int64_t riff_start, movi_list, odml_list;
70 int64_t frames_hdr_all;
72 int reserve_index_space;
73 int master_index_max_size;
74 int write_channel_mask;
77 typedef struct AVIStream {
78 int64_t frames_hdr_strm;
79 int64_t audio_strm_length;
89 int64_t strh_flags_offset;
91 uint32_t palette[AVPALETTE_COUNT];
92 uint32_t old_palette[AVPALETTE_COUNT];
96 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
98 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
100 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
101 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
102 return &idx->cluster[cl][id];
105 static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,
106 unsigned int flags, unsigned int size)
108 AVIContext *avi = s->priv_data;
109 AVIOContext *pb = s->pb;
110 AVIStream *avist = s->streams[stream_index]->priv_data;
111 AVIIndex *idx = &avist->indexes;
112 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
113 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
115 if (idx->ents_allocated <= idx->entry) {
116 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
118 idx->ents_allocated = 0;
120 return AVERROR(ENOMEM);
123 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
124 if (!idx->cluster[cl])
125 return AVERROR(ENOMEM);
126 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
130 memcpy(idx->cluster[cl][id].tag, tag, 4);
132 memset(idx->cluster[cl][id].tag, 0, 4);
133 idx->cluster[cl][id].flags = flags;
134 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
135 idx->cluster[cl][id].len = size;
136 avist->max_size = FFMAX(avist->max_size, size);
142 static av_cold int avi_init(struct AVFormatContext *s)
144 AVIContext *avi = s->priv_data;
146 if (avi->reserve_index_space > 0) {
147 avi->master_index_max_size = (avi->reserve_index_space - AVI_MASTER_INDEX_PREFIX_SIZE) / AVI_MASTER_INDEX_ENTRY_SIZE;
148 avi->master_index_max_size = FFMAX(avi->master_index_max_size, 16);
150 avi->master_index_max_size = AVI_MASTER_INDEX_SIZE_DEFAULT;
151 av_log(s, AV_LOG_DEBUG, "reserve_index_space:%d master_index_max_size:%d\n",
152 avi->reserve_index_space, avi->master_index_max_size);
154 return 1; /* stream initialization continues in avi_write_header */
157 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
158 const char *riff_tag, const char *list_tag)
160 AVIContext *avi = s->priv_data;
165 for (i = 0; i < s->nb_streams; i++) {
166 AVIStream *avist = s->streams[i]->priv_data;
167 avist->indexes.audio_strm_offset = avist->audio_strm_length;
168 avist->indexes.entry = 0;
171 avi->riff_start = ff_start_tag(pb, "RIFF");
172 ffio_wfourcc(pb, riff_tag);
173 loff = ff_start_tag(pb, "LIST");
174 ffio_wfourcc(pb, list_tag);
178 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
180 tag[0] = '0' + index / 10;
181 tag[1] = '0' + index % 10;
182 if (type == AVMEDIA_TYPE_VIDEO) {
185 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
186 // note: this is not an official code
197 static int avi_write_counters(AVFormatContext *s, int riff_id)
199 AVIOContext *pb = s->pb;
200 AVIContext *avi = s->priv_data;
201 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
203 AVCodecParameters *par;
205 file_size = avio_tell(pb);
206 for (n = 0; n < s->nb_streams; n++) {
207 AVIStream *avist = s->streams[n]->priv_data;
209 av_assert0(avist->frames_hdr_strm);
210 par = s->streams[n]->codecpar;
211 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
212 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
214 avio_wl32(pb, avist->packet_count);
216 avio_wl32(pb, avist->audio_strm_length / au_ssize);
217 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
218 nb_frames = FFMAX(nb_frames, avist->packet_count);
221 av_assert0(avi->frames_hdr_all);
222 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
223 avio_wl32(pb, nb_frames);
225 avio_seek(pb, file_size, SEEK_SET);
230 static void write_odml_master(AVFormatContext *s, int stream_index)
232 AVIOContext *pb = s->pb;
233 AVIContext *avi = s->priv_data;
234 AVStream *st = s->streams[stream_index];
235 AVCodecParameters *par = st->codecpar;
236 AVIStream *avist = st->priv_data;
237 unsigned char tag[5];
240 /* Starting to lay out AVI OpenDML master index.
241 * We want to make it JUNK entry for now, since we'd
242 * like to get away without making AVI an OpenDML one
243 * for compatibility reasons. */
244 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
245 avio_wl16(pb, 4); /* wLongsPerEntry */
246 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
247 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
248 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
249 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));
251 avio_wl64(pb, 0); /* dwReserved[3] */
252 avio_wl32(pb, 0); /* Must be 0. */
253 for (j = 0; j < avi->master_index_max_size * 2; j++)
255 ff_end_tag(pb, avist->indexes.indx_start);
258 static int avi_write_header(AVFormatContext *s)
260 AVIContext *avi = s->priv_data;
261 AVIOContext *pb = s->pb;
262 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
263 int64_t max_stream_duration = 0;
264 AVCodecParameters *video_par;
265 AVStream *video_st = NULL;
266 int64_t list1, list2, strh, strf;
267 AVDictionaryEntry *t = NULL;
270 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
271 av_log(s, AV_LOG_ERROR, "AVI does not support "
272 ">"AV_STRINGIFY(AVI_MAX_STREAM_COUNT)" streams\n");
273 return AVERROR(EINVAL);
276 for (n = 0; n < s->nb_streams; n++) {
277 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
278 if (!s->streams[n]->priv_data)
279 return AVERROR(ENOMEM);
284 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
287 ffio_wfourcc(pb, "avih");
288 avio_wl32(pb, 14 * 4);
292 for (n = 0; n < s->nb_streams; n++) {
293 AVCodecParameters *par = s->streams[n]->codecpar;
294 AVStream *st = s->streams[n];
295 bitrate = FFMIN(bitrate + par->bit_rate, INT32_MAX);
296 if (st->duration > 0) {
297 int64_t stream_duration = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
298 max_stream_duration = FFMAX(stream_duration, max_stream_duration);
300 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
306 /* guess master index size based on bitrate and duration */
307 if (!avi->reserve_index_space) {
308 double duration_est, filesize_est;
310 duration_est = (double)s->duration / AV_TIME_BASE;
311 else if (max_stream_duration > 0)
312 duration_est = (double)max_stream_duration / AV_TIME_BASE;
314 duration_est = 10 * 60 * 60; /* default to 10 hours */
315 filesize_est = duration_est * (bitrate / 8) * 1.10; /* add 10% safety margin for muxer+bitrate */
316 avi->master_index_max_size = FFMAX((int)ceil(filesize_est / AVI_MAX_RIFF_SIZE) + 1,
317 avi->master_index_max_size);
318 av_log(s, AV_LOG_DEBUG, "duration_est:%0.3f, filesize_est:%0.1fGiB, master_index_max_size:%d\n",
319 duration_est, filesize_est / (1024*1024*1024), avi->master_index_max_size);
324 // TODO: should be avg_frame_rate
326 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
327 video_st->time_base.den));
330 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
331 avio_wl32(pb, 0); /* padding */
332 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
333 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
335 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
336 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
337 avio_wl32(pb, nb_frames); /* nb frames, filled later */
338 avio_wl32(pb, 0); /* initial frame */
339 avio_wl32(pb, s->nb_streams); /* nb streams */
340 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
342 avio_wl32(pb, video_par->width);
343 avio_wl32(pb, video_par->height);
348 avio_wl32(pb, 0); /* reserved */
349 avio_wl32(pb, 0); /* reserved */
350 avio_wl32(pb, 0); /* reserved */
351 avio_wl32(pb, 0); /* reserved */
354 for (i = 0; i < n; i++) {
355 AVStream *st = s->streams[i];
356 AVCodecParameters *par = st->codecpar;
357 AVIStream *avist = st->priv_data;
358 list2 = ff_start_tag(pb, "LIST");
359 ffio_wfourcc(pb, "strl");
361 /* stream generic header */
362 strh = ff_start_tag(pb, "strh");
363 switch (par->codec_type) {
364 case AVMEDIA_TYPE_SUBTITLE:
365 // XSUB subtitles behave like video tracks, other subtitles
366 // are not (yet) supported.
367 if (par->codec_id != AV_CODEC_ID_XSUB) {
368 avpriv_report_missing_feature(s, "Subtitle streams other than DivX XSUB");
369 return AVERROR_PATCHWELCOME;
371 case AVMEDIA_TYPE_VIDEO:
372 ffio_wfourcc(pb, "vids");
374 case AVMEDIA_TYPE_AUDIO:
375 ffio_wfourcc(pb, "auds");
377 // case AVMEDIA_TYPE_TEXT:
378 // ffio_wfourcc(pb, "txts");
380 case AVMEDIA_TYPE_DATA:
381 ffio_wfourcc(pb, "dats");
384 if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
385 par->codec_id == AV_CODEC_ID_XSUB)
386 avio_wl32(pb, par->codec_tag);
389 avist->strh_flags_offset = avio_tell(pb);
390 avio_wl32(pb, 0); /* flags */
391 avio_wl16(pb, 0); /* priority */
392 avio_wl16(pb, 0); /* language */
393 avio_wl32(pb, 0); /* initial frame */
395 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
397 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
398 && par->codec_id != AV_CODEC_ID_XSUB
399 && au_byterate > 1000LL*au_scale) {
403 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
404 if (par->codec_id == AV_CODEC_ID_XSUB)
405 au_scale = au_byterate = 0;
407 avio_wl32(pb, au_scale); /* scale */
408 avio_wl32(pb, au_byterate); /* rate */
410 avio_wl32(pb, 0); /* start */
411 /* remember this offset to fill later */
412 avist->frames_hdr_strm = avio_tell(pb);
413 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
414 /* FIXME: this may be broken, but who cares */
415 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
417 avio_wl32(pb, 0); /* length, XXX: filled later */
419 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
420 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
421 avio_wl32(pb, 1024 * 1024);
422 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
423 avio_wl32(pb, 12 * 1024);
426 avio_wl32(pb, -1); /* quality */
427 avio_wl32(pb, au_ssize); /* sample size */
429 avio_wl16(pb, par->width);
430 avio_wl16(pb, par->height);
431 ff_end_tag(pb, strh);
433 if (par->codec_type != AVMEDIA_TYPE_DATA) {
435 enum AVPixelFormat pix_fmt;
437 strf = ff_start_tag(pb, "strf");
438 switch (par->codec_type) {
439 case AVMEDIA_TYPE_SUBTITLE:
440 /* XSUB subtitles behave like video tracks, other subtitles
441 * are not (yet) supported. */
442 if (par->codec_id != AV_CODEC_ID_XSUB)
444 case AVMEDIA_TYPE_VIDEO:
445 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
447 && par->codec_id == AV_CODEC_ID_RAWVIDEO
448 && par->format == AV_PIX_FMT_RGB555LE
449 && par->bits_per_coded_sample == 15)
450 par->bits_per_coded_sample = 16;
451 avist->pal_offset = avio_tell(pb) + 40;
452 ff_put_bmp_header(pb, par, 0, 0);
453 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
454 par->bits_per_coded_sample);
456 && par->codec_id == AV_CODEC_ID_RAWVIDEO
457 && par->format != pix_fmt
458 && par->format != AV_PIX_FMT_NONE)
459 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
460 av_get_pix_fmt_name(par->format));
462 if (par->format == AV_PIX_FMT_PAL8) {
463 if (par->bits_per_coded_sample < 0 || par->bits_per_coded_sample > 8) {
464 av_log(s, AV_LOG_ERROR, "PAL8 with %d bps is not allowed\n", par->bits_per_coded_sample);
465 return AVERROR(EINVAL);
470 case AVMEDIA_TYPE_AUDIO:
471 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
472 if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)
476 av_log(s, AV_LOG_ERROR,
477 "Invalid or not supported codec type '%s' found in the input\n",
478 (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));
479 return AVERROR(EINVAL);
481 ff_end_tag(pb, strf);
482 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
483 ff_riff_write_info_tag(s->pb, "strn", t->value);
486 if (par->codec_id == AV_CODEC_ID_XSUB
487 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
488 const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);
491 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
493 return AVERROR(ENOMEM);
494 ff_riff_write_info_tag(s->pb, "strn", str);
500 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
501 write_odml_master(s, i);
504 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
505 st->sample_aspect_ratio.num > 0 &&
506 st->sample_aspect_ratio.den > 0) {
507 int vprp = ff_start_tag(pb, "vprp");
508 AVRational dar = av_mul_q(st->sample_aspect_ratio,
509 (AVRational) { par->width,
511 int num, den, fields, i;
512 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
513 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_BB ||
514 par->field_order == AV_FIELD_TB || par->field_order == AV_FIELD_BT) {
515 fields = 2; // interlaced
517 fields = 1; // progressive
520 avio_wl32(pb, 0); // video format = unknown
521 avio_wl32(pb, 0); // video standard = unknown
522 // TODO: should be avg_frame_rate
523 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
524 avio_wl32(pb, par->width);
525 avio_wl32(pb, par->height);
528 avio_wl32(pb, par->width);
529 avio_wl32(pb, par->height);
530 avio_wl32(pb, fields); // fields per frame
532 for (i = 0; i < fields; i++) {
534 // OpenDML v1.02 is not very specific on what value to use for
535 // start_line when frame data is not coming from a capturing device,
536 // so just use 0/1 depending on the field order for interlaced frames
537 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_TB) {
538 start_line = (i == 0) ? 0 : 1;
539 } else if (par->field_order == AV_FIELD_BB || par->field_order == AV_FIELD_BT) {
540 start_line = (i == 0) ? 1 : 0;
545 avio_wl32(pb, par->height / fields); // compressed bitmap height
546 avio_wl32(pb, par->width); // compressed bitmap width
547 avio_wl32(pb, par->height / fields); // valid bitmap height
548 avio_wl32(pb, par->width); // valid bitmap width
549 avio_wl32(pb, 0); // valid bitmap X offset
550 avio_wl32(pb, 0); // valid bitmap Y offset
551 avio_wl32(pb, 0); // valid X offset in T
552 avio_wl32(pb, start_line); // valid Y start line
554 ff_end_tag(pb, vprp);
557 ff_end_tag(pb, list2);
560 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
561 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
562 avi->odml_list = ff_start_tag(pb, "JUNK");
563 ffio_wfourcc(pb, "odml");
564 ffio_wfourcc(pb, "dmlh");
566 for (i = 0; i < 248; i += 4)
568 ff_end_tag(pb, avi->odml_list);
571 ff_end_tag(pb, list1);
573 ff_riff_write_info(s);
576 padding = s->metadata_header_padding;
580 /* some padding for easier tag editing */
582 list2 = ff_start_tag(pb, "JUNK");
583 for (i = padding; i > 0; i -= 4)
585 ff_end_tag(pb, list2);
588 avi->movi_list = ff_start_tag(pb, "LIST");
589 ffio_wfourcc(pb, "movi");
594 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
596 AVIOContext *pb = s->pb;
597 AVIContext *avi = s->priv_data;
598 AVIStream *avist = s->streams[stream_index]->priv_data;
600 int au_byterate, au_ssize, au_scale;
604 /* Updating one entry in the AVI OpenDML master index */
605 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
606 ffio_wfourcc(pb, "indx"); /* enabling this entry */
608 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
609 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
610 avio_wl64(pb, ix); /* qwOffset */
611 avio_wl32(pb, size); /* dwSize */
612 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
613 if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
614 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
615 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
616 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
617 avist->sample_requested = 1;
619 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
621 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
623 avio_seek(pb, pos, SEEK_SET);
626 static int avi_write_ix(AVFormatContext *s)
628 AVIOContext *pb = s->pb;
629 AVIContext *avi = s->priv_data;
631 char ix_tag[] = "ix00";
634 av_assert0(pb->seekable & AVIO_SEEKABLE_NORMAL);
636 for (i = 0; i < s->nb_streams; i++) {
637 AVIStream *avist = s->streams[i]->priv_data;
638 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == avi->master_index_max_size) {
640 int size = AVI_MASTER_INDEX_PREFIX_SIZE + AVI_MASTER_INDEX_ENTRY_SIZE * avi->master_index_max_size;
643 update_odml_entry(s, i, pos, size);
644 write_odml_master(s, i);
645 av_assert1(avio_tell(pb) - pos == size);
646 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
648 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < avi->master_index_max_size);
651 for (i = 0; i < s->nb_streams; i++) {
652 AVIStream *avist = s->streams[i]->priv_data;
655 avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);
658 /* Writing AVI OpenDML leaf index chunk */
660 ffio_wfourcc(pb, ix_tag); /* ix?? */
661 avio_wl32(pb, avist->indexes.entry * 8 + 24);
663 avio_wl16(pb, 2); /* wLongsPerEntry */
664 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
665 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
666 avio_wl32(pb, avist->indexes.entry);
668 ffio_wfourcc(pb, tag); /* dwChunkId */
669 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
670 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
672 for (j = 0; j < avist->indexes.entry; j++) {
673 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
674 avio_wl32(pb, ie->pos + 8);
675 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
676 (ie->flags & 0x10 ? 0 : 0x80000000));
679 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
684 static int avi_write_idx1(AVFormatContext *s)
686 AVIOContext *pb = s->pb;
687 AVIContext *avi = s->priv_data;
692 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
694 AVIIentry *ie = 0, *tie;
695 int empty, stream_id = -1;
697 idx_chunk = ff_start_tag(pb, "idx1");
698 for (i = 0; i < s->nb_streams; i++) {
699 avist = s->streams[i]->priv_data;
705 for (i = 0; i < s->nb_streams; i++) {
706 avist = s->streams[i]->priv_data;
707 if (avist->indexes.entry <= avist->entry)
710 tie = avi_get_ientry(&avist->indexes, avist->entry);
711 if (empty || tie->pos < ie->pos) {
718 avist = s->streams[stream_id]->priv_data;
720 ffio_wfourcc(pb, ie->tag);
722 avi_stream2fourcc(tag, stream_id,
723 s->streams[stream_id]->codecpar->codec_type);
724 ffio_wfourcc(pb, tag);
726 avio_wl32(pb, ie->flags);
727 avio_wl32(pb, ie->pos);
728 avio_wl32(pb, ie->len);
732 ff_end_tag(pb, idx_chunk);
734 avi_write_counters(s, avi->riff_id);
739 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
741 AVIStream *avist = s->streams[stream_index]->priv_data;
742 AVCodecParameters *par = s->streams[stream_index]->codecpar;
744 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
745 while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&
746 dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
747 AVPacket empty_packet;
749 if (dts - avist->packet_count > 60000) {
750 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
751 return AVERROR(EINVAL);
754 av_init_packet(&empty_packet);
755 empty_packet.size = 0;
756 empty_packet.data = NULL;
757 empty_packet.stream_index = stream_index;
758 avi_write_packet_internal(s, &empty_packet);
759 ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
765 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
767 const int stream_index = pkt->stream_index;
768 AVCodecParameters *par = s->streams[stream_index]->codecpar;
771 if (par->codec_id == AV_CODEC_ID_H264 && par->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
772 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
777 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
781 return avi_write_packet_internal(s, pkt); /* Passthrough */
783 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
784 AVIStream *avist = s->streams[stream_index]->priv_data;
785 AVIOContext *pb = s->pb;
786 AVPacket *opkt = pkt;
788 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && par->codec_tag == 0) {
789 int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;
790 int expected_stride = ((par->width * bpc + 31) >> 5)*4;
791 reshuffle_ret = ff_reshuffle_raw_rgb(s, &pkt, par, expected_stride);
792 if (reshuffle_ret < 0)
793 return reshuffle_ret;
796 if (par->format == AV_PIX_FMT_PAL8) {
797 ret = ff_get_packet_palette(s, opkt, reshuffle_ret, avist->palette);
801 int pal_size = 1 << par->bits_per_coded_sample;
804 av_assert0(par->bits_per_coded_sample >= 0 && par->bits_per_coded_sample <= 8);
806 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && avist->pal_offset) {
807 int64_t cur_offset = avio_tell(pb);
808 avio_seek(pb, avist->pal_offset, SEEK_SET);
809 for (i = 0; i < pal_size; i++) {
810 uint32_t v = avist->palette[i];
811 avio_wl32(pb, v & 0xffffff);
813 avio_seek(pb, cur_offset, SEEK_SET);
814 memcpy(avist->old_palette, avist->palette, pal_size * 4);
815 avist->pal_offset = 0;
817 if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {
818 unsigned char tag[5];
819 avi_stream2fourcc(tag, stream_index, par->codec_type);
820 tag[2] = 'p'; tag[3] = 'c';
821 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
822 if (avist->strh_flags_offset) {
823 int64_t cur_offset = avio_tell(pb);
824 avio_seek(pb, avist->strh_flags_offset, SEEK_SET);
825 avio_wl32(pb, AVISF_VIDEO_PALCHANGES);
826 avio_seek(pb, cur_offset, SEEK_SET);
827 avist->strh_flags_offset = 0;
829 ret = avi_add_ientry(s, stream_index, tag, AVIIF_NO_TIME,
834 pc_tag = ff_start_tag(pb, tag);
836 avio_w8(pb, pal_size & 0xFF);
837 avio_wl16(pb, 0); // reserved
838 for (i = 0; i < pal_size; i++) {
839 uint32_t v = avist->palette[i];
842 ff_end_tag(pb, pc_tag);
843 memcpy(avist->old_palette, avist->palette, pal_size * 4);
848 ret = avi_write_packet_internal(s, pkt);
852 av_packet_free(&pkt);
857 return avi_write_packet_internal(s, pkt);
860 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
862 unsigned char tag[5];
863 unsigned int flags = 0;
864 const int stream_index = pkt->stream_index;
865 int size = pkt->size;
866 AVIContext *avi = s->priv_data;
867 AVIOContext *pb = s->pb;
868 AVIStream *avist = s->streams[stream_index]->priv_data;
869 AVCodecParameters *par = s->streams[stream_index]->codecpar;
871 if (pkt->dts != AV_NOPTS_VALUE)
872 avist->last_dts = pkt->dts + pkt->duration;
874 avist->packet_count++;
876 // Make sure to put an OpenDML chunk when the file size exceeds the limits
877 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
878 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
880 ff_end_tag(pb, avi->movi_list);
882 if (avi->riff_id == 1)
885 ff_end_tag(pb, avi->riff_start);
886 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
889 avi_stream2fourcc(tag, stream_index, par->codec_type);
890 if (pkt->flags & AV_PKT_FLAG_KEY)
892 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
893 avist->audio_strm_length += size;
895 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
897 ret = avi_add_ientry(s, stream_index, NULL, flags, size);
902 avio_write(pb, tag, 4);
904 avio_write(pb, pkt->data, size);
911 static int avi_write_trailer(AVFormatContext *s)
913 AVIContext *avi = s->priv_data;
914 AVIOContext *pb = s->pb;
919 for (i = 0; i < s->nb_streams; i++) {
920 AVIStream *avist = s->streams[i]->priv_data;
921 write_skip_frames(s, i, avist->last_dts);
924 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
925 if (avi->riff_id == 1) {
926 ff_end_tag(pb, avi->movi_list);
927 res = avi_write_idx1(s);
928 ff_end_tag(pb, avi->riff_start);
931 ff_end_tag(pb, avi->movi_list);
932 ff_end_tag(pb, avi->riff_start);
934 file_size = avio_tell(pb);
935 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
936 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
939 for (n = nb_frames = 0; n < s->nb_streams; n++) {
940 AVCodecParameters *par = s->streams[n]->codecpar;
941 AVIStream *avist = s->streams[n]->priv_data;
943 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
944 if (nb_frames < avist->packet_count)
945 nb_frames = avist->packet_count;
947 if (par->codec_id == AV_CODEC_ID_MP2 ||
948 par->codec_id == AV_CODEC_ID_MP3)
949 nb_frames += avist->packet_count;
952 avio_wl32(pb, nb_frames);
953 avio_seek(pb, file_size, SEEK_SET);
955 avi_write_counters(s, avi->riff_id);
959 if (avi->riff_id >= avi->master_index_max_size) {
960 int index_space = AVI_MASTER_INDEX_PREFIX_SIZE +
961 AVI_MASTER_INDEX_ENTRY_SIZE * avi->riff_id;
962 av_log(s, AV_LOG_WARNING, "Output file not strictly OpenDML compliant, "
963 "consider re-muxing with 'reserve_index_space' option value >= %d\n",
967 for (i = 0; i < s->nb_streams; i++) {
968 AVIStream *avist = s->streams[i]->priv_data;
969 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
970 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
971 avio_wl32(pb, avist->max_size);
978 static void avi_deinit(AVFormatContext *s)
980 for (int i = 0; i < s->nb_streams; i++) {
981 AVIStream *avist = s->streams[i]->priv_data;
984 for (int j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
985 av_freep(&avist->indexes.cluster[j]);
986 av_freep(&avist->indexes.cluster);
987 avist->indexes.ents_allocated = avist->indexes.entry = 0;
991 #define OFFSET(x) offsetof(AVIContext, x)
992 #define ENC AV_OPT_FLAG_ENCODING_PARAM
993 static const AVOption options[] = {
994 { "reserve_index_space", "reserve space (in bytes) at the beginning of the file for each stream index", OFFSET(reserve_index_space), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, ENC },
995 { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
999 static const AVClass avi_muxer_class = {
1000 .class_name = "AVI muxer",
1001 .item_name = av_default_item_name,
1003 .version = LIBAVUTIL_VERSION_INT,
1006 AVOutputFormat ff_avi_muxer = {
1008 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
1009 .mime_type = "video/x-msvideo",
1010 .extensions = "avi",
1011 .priv_data_size = sizeof(AVIContext),
1012 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
1013 .video_codec = AV_CODEC_ID_MPEG4,
1015 .deinit = avi_deinit,
1016 .write_header = avi_write_header,
1017 .write_packet = avi_write_packet,
1018 .write_trailer = avi_write_trailer,
1019 .codec_tag = (const AVCodecTag * const []) {
1020 ff_codec_bmp_tags, ff_codec_wav_tags, 0
1022 .priv_class = &avi_muxer_class,