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;
78 typedef struct AVIStream {
79 int64_t frames_hdr_strm;
80 int64_t audio_strm_length;
90 int64_t strh_flags_offset;
92 uint32_t palette[AVPALETTE_COUNT];
93 uint32_t old_palette[AVPALETTE_COUNT];
97 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
99 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
101 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
102 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
103 return &idx->cluster[cl][id];
106 static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,
107 unsigned int flags, unsigned int size)
109 AVIContext *avi = s->priv_data;
110 AVIOContext *pb = s->pb;
111 AVIStream *avist = s->streams[stream_index]->priv_data;
112 AVIIndex *idx = &avist->indexes;
113 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
114 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
116 if (idx->ents_allocated <= idx->entry) {
117 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
119 idx->ents_allocated = 0;
121 return AVERROR(ENOMEM);
124 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
125 if (!idx->cluster[cl])
126 return AVERROR(ENOMEM);
127 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
131 memcpy(idx->cluster[cl][id].tag, tag, 4);
133 memset(idx->cluster[cl][id].tag, 0, 4);
134 idx->cluster[cl][id].flags = flags;
135 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
136 idx->cluster[cl][id].len = size;
137 avist->max_size = FFMAX(avist->max_size, size);
143 static av_cold int avi_init(struct AVFormatContext *s)
145 AVIContext *avi = s->priv_data;
147 if (avi->reserve_index_space > 0) {
148 avi->master_index_max_size = (avi->reserve_index_space - AVI_MASTER_INDEX_PREFIX_SIZE) / AVI_MASTER_INDEX_ENTRY_SIZE;
149 avi->master_index_max_size = FFMAX(avi->master_index_max_size, 16);
151 avi->master_index_max_size = AVI_MASTER_INDEX_SIZE_DEFAULT;
152 av_log(s, AV_LOG_DEBUG, "reserve_index_space:%d master_index_max_size:%d\n",
153 avi->reserve_index_space, avi->master_index_max_size);
155 return 1; /* stream initialization continues in avi_write_header */
158 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
159 const char *riff_tag, const char *list_tag)
161 AVIContext *avi = s->priv_data;
166 for (i = 0; i < s->nb_streams; i++) {
167 AVIStream *avist = s->streams[i]->priv_data;
168 avist->indexes.audio_strm_offset = avist->audio_strm_length;
169 avist->indexes.entry = 0;
172 avi->riff_start = ff_start_tag(pb, "RIFF");
173 ffio_wfourcc(pb, riff_tag);
174 loff = ff_start_tag(pb, "LIST");
175 ffio_wfourcc(pb, list_tag);
179 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
181 tag[0] = '0' + index / 10;
182 tag[1] = '0' + index % 10;
183 if (type == AVMEDIA_TYPE_VIDEO) {
186 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
187 // note: this is not an official code
198 static int avi_write_counters(AVFormatContext *s, int riff_id)
200 AVIOContext *pb = s->pb;
201 AVIContext *avi = s->priv_data;
202 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
204 AVCodecParameters *par;
206 file_size = avio_tell(pb);
207 for (n = 0; n < s->nb_streams; n++) {
208 AVIStream *avist = s->streams[n]->priv_data;
210 av_assert0(avist->frames_hdr_strm);
211 par = s->streams[n]->codecpar;
212 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
213 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
215 avio_wl32(pb, avist->packet_count);
217 avio_wl32(pb, avist->audio_strm_length / au_ssize);
218 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
219 nb_frames = FFMAX(nb_frames, avist->packet_count);
222 av_assert0(avi->frames_hdr_all);
223 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
224 avio_wl32(pb, nb_frames);
226 avio_seek(pb, file_size, SEEK_SET);
231 static void write_odml_master(AVFormatContext *s, int stream_index)
233 AVIOContext *pb = s->pb;
234 AVIContext *avi = s->priv_data;
235 AVStream *st = s->streams[stream_index];
236 AVCodecParameters *par = st->codecpar;
237 AVIStream *avist = st->priv_data;
238 unsigned char tag[5];
241 /* Starting to lay out AVI OpenDML master index.
242 * We want to make it JUNK entry for now, since we'd
243 * like to get away without making AVI an OpenDML one
244 * for compatibility reasons. */
245 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
246 avio_wl16(pb, 4); /* wLongsPerEntry */
247 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
248 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
249 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
250 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));
252 avio_wl64(pb, 0); /* dwReserved[3] */
253 avio_wl32(pb, 0); /* Must be 0. */
254 for (j = 0; j < avi->master_index_max_size * 2; j++)
256 ff_end_tag(pb, avist->indexes.indx_start);
259 static int avi_write_header(AVFormatContext *s)
261 AVIContext *avi = s->priv_data;
262 AVIOContext *pb = s->pb;
263 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
264 int64_t max_stream_duration = 0;
265 AVCodecParameters *video_par;
266 AVStream *video_st = NULL;
267 int64_t list1, list2, strh, strf;
268 AVDictionaryEntry *t = NULL;
271 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
272 av_log(s, AV_LOG_ERROR, "AVI does not support "
273 ">"AV_STRINGIFY(AVI_MAX_STREAM_COUNT)" streams\n");
274 return AVERROR(EINVAL);
277 for (n = 0; n < s->nb_streams; n++) {
278 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
279 if (!s->streams[n]->priv_data)
280 return AVERROR(ENOMEM);
285 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
288 ffio_wfourcc(pb, "avih");
289 avio_wl32(pb, 14 * 4);
293 for (n = 0; n < s->nb_streams; n++) {
294 AVCodecParameters *par = s->streams[n]->codecpar;
295 AVStream *st = s->streams[n];
296 bitrate = FFMIN(bitrate + par->bit_rate, INT32_MAX);
297 if (st->duration > 0) {
298 int64_t stream_duration = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
299 max_stream_duration = FFMAX(stream_duration, max_stream_duration);
301 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
307 /* guess master index size based on bitrate and duration */
308 if (!avi->reserve_index_space) {
309 double duration_est, filesize_est;
311 duration_est = (double)s->duration / AV_TIME_BASE;
312 else if (max_stream_duration > 0)
313 duration_est = (double)max_stream_duration / AV_TIME_BASE;
315 duration_est = 10 * 60 * 60; /* default to 10 hours */
316 filesize_est = duration_est * (bitrate / 8) * 1.10; /* add 10% safety margin for muxer+bitrate */
317 avi->master_index_max_size = FFMAX((int)ceil(filesize_est / AVI_MAX_RIFF_SIZE) + 1,
318 avi->master_index_max_size);
319 av_log(s, AV_LOG_DEBUG, "duration_est:%0.3f, filesize_est:%0.1fGiB, master_index_max_size:%d\n",
320 duration_est, filesize_est / (1024*1024*1024), avi->master_index_max_size);
325 // TODO: should be avg_frame_rate
327 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
328 video_st->time_base.den));
331 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
332 avio_wl32(pb, 0); /* padding */
333 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
334 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
336 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
337 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
338 avio_wl32(pb, nb_frames); /* nb frames, filled later */
339 avio_wl32(pb, 0); /* initial frame */
340 avio_wl32(pb, s->nb_streams); /* nb streams */
341 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
343 avio_wl32(pb, video_par->width);
344 avio_wl32(pb, video_par->height);
349 avio_wl32(pb, 0); /* reserved */
350 avio_wl32(pb, 0); /* reserved */
351 avio_wl32(pb, 0); /* reserved */
352 avio_wl32(pb, 0); /* reserved */
355 for (i = 0; i < n; i++) {
356 AVStream *st = s->streams[i];
357 AVCodecParameters *par = st->codecpar;
358 AVIStream *avist = st->priv_data;
359 list2 = ff_start_tag(pb, "LIST");
360 ffio_wfourcc(pb, "strl");
362 /* stream generic header */
363 strh = ff_start_tag(pb, "strh");
364 switch (par->codec_type) {
365 case AVMEDIA_TYPE_SUBTITLE:
366 // XSUB subtitles behave like video tracks, other subtitles
367 // are not (yet) supported.
368 if (par->codec_id != AV_CODEC_ID_XSUB) {
369 avpriv_report_missing_feature(s, "Subtitle streams other than DivX XSUB");
370 return AVERROR_PATCHWELCOME;
372 case AVMEDIA_TYPE_VIDEO:
373 ffio_wfourcc(pb, "vids");
375 case AVMEDIA_TYPE_AUDIO:
376 ffio_wfourcc(pb, "auds");
378 // case AVMEDIA_TYPE_TEXT:
379 // ffio_wfourcc(pb, "txts");
381 case AVMEDIA_TYPE_DATA:
382 ffio_wfourcc(pb, "dats");
385 if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
386 par->codec_id == AV_CODEC_ID_XSUB)
387 avio_wl32(pb, par->codec_tag);
390 avist->strh_flags_offset = avio_tell(pb);
391 avio_wl32(pb, 0); /* flags */
392 avio_wl16(pb, 0); /* priority */
393 avio_wl16(pb, 0); /* language */
394 avio_wl32(pb, 0); /* initial frame */
396 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
398 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
399 && par->codec_id != AV_CODEC_ID_XSUB
400 && au_byterate > 1000LL*au_scale) {
404 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
405 if (par->codec_id == AV_CODEC_ID_XSUB)
406 au_scale = au_byterate = 0;
408 avio_wl32(pb, au_scale); /* scale */
409 avio_wl32(pb, au_byterate); /* rate */
411 avio_wl32(pb, 0); /* start */
412 /* remember this offset to fill later */
413 avist->frames_hdr_strm = avio_tell(pb);
414 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
415 /* FIXME: this may be broken, but who cares */
416 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
418 avio_wl32(pb, 0); /* length, XXX: filled later */
420 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
421 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
422 avio_wl32(pb, 1024 * 1024);
423 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
424 avio_wl32(pb, 12 * 1024);
427 avio_wl32(pb, -1); /* quality */
428 avio_wl32(pb, au_ssize); /* sample size */
430 avio_wl16(pb, par->width);
431 avio_wl16(pb, par->height);
432 ff_end_tag(pb, strh);
434 if (par->codec_type != AVMEDIA_TYPE_DATA) {
436 enum AVPixelFormat pix_fmt;
438 strf = ff_start_tag(pb, "strf");
439 switch (par->codec_type) {
440 case AVMEDIA_TYPE_SUBTITLE:
441 /* XSUB subtitles behave like video tracks, other subtitles
442 * are not (yet) supported. */
443 if (par->codec_id != AV_CODEC_ID_XSUB)
445 case AVMEDIA_TYPE_VIDEO:
446 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
448 && par->codec_id == AV_CODEC_ID_RAWVIDEO
449 && par->format == AV_PIX_FMT_RGB555LE
450 && par->bits_per_coded_sample == 15)
451 par->bits_per_coded_sample = 16;
452 avist->pal_offset = avio_tell(pb) + 40;
453 ff_put_bmp_header(pb, par, 0, 0, avi->flipped_raw_rgb);
454 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
455 par->bits_per_coded_sample);
457 && par->codec_id == AV_CODEC_ID_RAWVIDEO
458 && par->format != pix_fmt
459 && par->format != AV_PIX_FMT_NONE)
460 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
461 av_get_pix_fmt_name(par->format));
463 if (par->format == AV_PIX_FMT_PAL8) {
464 if (par->bits_per_coded_sample < 0 || par->bits_per_coded_sample > 8) {
465 av_log(s, AV_LOG_ERROR, "PAL8 with %d bps is not allowed\n", par->bits_per_coded_sample);
466 return AVERROR(EINVAL);
471 case AVMEDIA_TYPE_AUDIO:
472 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
473 if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)
477 av_log(s, AV_LOG_ERROR,
478 "Invalid or not supported codec type '%s' found in the input\n",
479 (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));
480 return AVERROR(EINVAL);
482 ff_end_tag(pb, strf);
483 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
484 ff_riff_write_info_tag(s->pb, "strn", t->value);
487 if (par->codec_id == AV_CODEC_ID_XSUB
488 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
489 const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);
492 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
494 return AVERROR(ENOMEM);
495 ff_riff_write_info_tag(s->pb, "strn", str);
501 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
502 write_odml_master(s, i);
505 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
506 st->sample_aspect_ratio.num > 0 &&
507 st->sample_aspect_ratio.den > 0) {
508 int vprp = ff_start_tag(pb, "vprp");
509 AVRational dar = av_mul_q(st->sample_aspect_ratio,
510 (AVRational) { par->width,
512 int num, den, fields, i;
513 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
514 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_BB ||
515 par->field_order == AV_FIELD_TB || par->field_order == AV_FIELD_BT) {
516 fields = 2; // interlaced
518 fields = 1; // progressive
521 avio_wl32(pb, 0); // video format = unknown
522 avio_wl32(pb, 0); // video standard = unknown
523 // TODO: should be avg_frame_rate
524 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
525 avio_wl32(pb, par->width);
526 avio_wl32(pb, par->height);
529 avio_wl32(pb, par->width);
530 avio_wl32(pb, par->height);
531 avio_wl32(pb, fields); // fields per frame
533 for (i = 0; i < fields; i++) {
535 // OpenDML v1.02 is not very specific on what value to use for
536 // start_line when frame data is not coming from a capturing device,
537 // so just use 0/1 depending on the field order for interlaced frames
538 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_TB) {
539 start_line = (i == 0) ? 0 : 1;
540 } else if (par->field_order == AV_FIELD_BB || par->field_order == AV_FIELD_BT) {
541 start_line = (i == 0) ? 1 : 0;
546 avio_wl32(pb, par->height / fields); // compressed bitmap height
547 avio_wl32(pb, par->width); // compressed bitmap width
548 avio_wl32(pb, par->height / fields); // valid bitmap height
549 avio_wl32(pb, par->width); // valid bitmap width
550 avio_wl32(pb, 0); // valid bitmap X offset
551 avio_wl32(pb, 0); // valid bitmap Y offset
552 avio_wl32(pb, 0); // valid X offset in T
553 avio_wl32(pb, start_line); // valid Y start line
555 ff_end_tag(pb, vprp);
558 ff_end_tag(pb, list2);
561 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
562 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
563 avi->odml_list = ff_start_tag(pb, "JUNK");
564 ffio_wfourcc(pb, "odml");
565 ffio_wfourcc(pb, "dmlh");
567 for (i = 0; i < 248; i += 4)
569 ff_end_tag(pb, avi->odml_list);
572 ff_end_tag(pb, list1);
574 ff_riff_write_info(s);
577 padding = s->metadata_header_padding;
581 /* some padding for easier tag editing */
583 list2 = ff_start_tag(pb, "JUNK");
584 for (i = padding; i > 0; i -= 4)
586 ff_end_tag(pb, list2);
589 avi->movi_list = ff_start_tag(pb, "LIST");
590 ffio_wfourcc(pb, "movi");
595 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
597 AVIOContext *pb = s->pb;
598 AVIContext *avi = s->priv_data;
599 AVIStream *avist = s->streams[stream_index]->priv_data;
601 int au_byterate, au_ssize, au_scale;
605 /* Updating one entry in the AVI OpenDML master index */
606 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
607 ffio_wfourcc(pb, "indx"); /* enabling this entry */
609 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
610 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
611 avio_wl64(pb, ix); /* qwOffset */
612 avio_wl32(pb, size); /* dwSize */
613 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
614 if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
615 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
616 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
617 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
618 avist->sample_requested = 1;
620 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
622 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
624 avio_seek(pb, pos, SEEK_SET);
627 static int avi_write_ix(AVFormatContext *s)
629 AVIOContext *pb = s->pb;
630 AVIContext *avi = s->priv_data;
632 char ix_tag[] = "ix00";
635 av_assert0(pb->seekable & AVIO_SEEKABLE_NORMAL);
637 for (i = 0; i < s->nb_streams; i++) {
638 AVIStream *avist = s->streams[i]->priv_data;
639 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == avi->master_index_max_size) {
641 int size = AVI_MASTER_INDEX_PREFIX_SIZE + AVI_MASTER_INDEX_ENTRY_SIZE * avi->master_index_max_size;
644 update_odml_entry(s, i, pos, size);
645 write_odml_master(s, i);
646 av_assert1(avio_tell(pb) - pos == size);
647 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
649 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < avi->master_index_max_size);
652 for (i = 0; i < s->nb_streams; i++) {
653 AVIStream *avist = s->streams[i]->priv_data;
656 avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);
659 /* Writing AVI OpenDML leaf index chunk */
661 ffio_wfourcc(pb, ix_tag); /* ix?? */
662 avio_wl32(pb, avist->indexes.entry * 8 + 24);
664 avio_wl16(pb, 2); /* wLongsPerEntry */
665 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
666 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
667 avio_wl32(pb, avist->indexes.entry);
669 ffio_wfourcc(pb, tag); /* dwChunkId */
670 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
671 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
673 for (j = 0; j < avist->indexes.entry; j++) {
674 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
675 avio_wl32(pb, ie->pos + 8);
676 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
677 (ie->flags & 0x10 ? 0 : 0x80000000));
680 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
685 static int avi_write_idx1(AVFormatContext *s)
687 AVIOContext *pb = s->pb;
688 AVIContext *avi = s->priv_data;
693 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
695 AVIIentry *ie = 0, *tie;
696 int empty, stream_id = -1;
698 idx_chunk = ff_start_tag(pb, "idx1");
699 for (i = 0; i < s->nb_streams; i++) {
700 avist = s->streams[i]->priv_data;
706 for (i = 0; i < s->nb_streams; i++) {
707 avist = s->streams[i]->priv_data;
708 if (avist->indexes.entry <= avist->entry)
711 tie = avi_get_ientry(&avist->indexes, avist->entry);
712 if (empty || tie->pos < ie->pos) {
719 avist = s->streams[stream_id]->priv_data;
721 ffio_wfourcc(pb, ie->tag);
723 avi_stream2fourcc(tag, stream_id,
724 s->streams[stream_id]->codecpar->codec_type);
725 ffio_wfourcc(pb, tag);
727 avio_wl32(pb, ie->flags);
728 avio_wl32(pb, ie->pos);
729 avio_wl32(pb, ie->len);
733 ff_end_tag(pb, idx_chunk);
735 avi_write_counters(s, avi->riff_id);
740 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
742 AVIStream *avist = s->streams[stream_index]->priv_data;
743 AVCodecParameters *par = s->streams[stream_index]->codecpar;
745 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
746 while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&
747 dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
748 AVPacket empty_packet;
750 if (dts - avist->packet_count > 60000) {
751 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
752 return AVERROR(EINVAL);
755 av_init_packet(&empty_packet);
756 empty_packet.size = 0;
757 empty_packet.data = NULL;
758 empty_packet.stream_index = stream_index;
759 avi_write_packet_internal(s, &empty_packet);
760 ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
766 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
768 const int stream_index = pkt->stream_index;
769 AVCodecParameters *par = s->streams[stream_index]->codecpar;
772 if (par->codec_id == AV_CODEC_ID_H264 && par->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
773 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
778 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
782 return avi_write_packet_internal(s, pkt); /* Passthrough */
784 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
785 AVIStream *avist = s->streams[stream_index]->priv_data;
786 AVIOContext *pb = s->pb;
787 AVPacket *opkt = pkt;
789 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && par->codec_tag == 0) {
790 int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;
791 int expected_stride = ((par->width * bpc + 31) >> 5)*4;
792 reshuffle_ret = ff_reshuffle_raw_rgb(s, &pkt, par, expected_stride);
793 if (reshuffle_ret < 0)
794 return reshuffle_ret;
797 if (par->format == AV_PIX_FMT_PAL8) {
798 ret = ff_get_packet_palette(s, opkt, reshuffle_ret, avist->palette);
802 int pal_size = 1 << par->bits_per_coded_sample;
805 av_assert0(par->bits_per_coded_sample >= 0 && par->bits_per_coded_sample <= 8);
807 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && avist->pal_offset) {
808 int64_t cur_offset = avio_tell(pb);
809 avio_seek(pb, avist->pal_offset, SEEK_SET);
810 for (i = 0; i < pal_size; i++) {
811 uint32_t v = avist->palette[i];
812 avio_wl32(pb, v & 0xffffff);
814 avio_seek(pb, cur_offset, SEEK_SET);
815 memcpy(avist->old_palette, avist->palette, pal_size * 4);
816 avist->pal_offset = 0;
818 if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {
819 unsigned char tag[5];
820 avi_stream2fourcc(tag, stream_index, par->codec_type);
821 tag[2] = 'p'; tag[3] = 'c';
822 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
823 if (avist->strh_flags_offset) {
824 int64_t cur_offset = avio_tell(pb);
825 avio_seek(pb, avist->strh_flags_offset, SEEK_SET);
826 avio_wl32(pb, AVISF_VIDEO_PALCHANGES);
827 avio_seek(pb, cur_offset, SEEK_SET);
828 avist->strh_flags_offset = 0;
830 ret = avi_add_ientry(s, stream_index, tag, AVIIF_NO_TIME,
835 pc_tag = ff_start_tag(pb, tag);
837 avio_w8(pb, pal_size & 0xFF);
838 avio_wl16(pb, 0); // reserved
839 for (i = 0; i < pal_size; i++) {
840 uint32_t v = avist->palette[i];
843 ff_end_tag(pb, pc_tag);
844 memcpy(avist->old_palette, avist->palette, pal_size * 4);
849 ret = avi_write_packet_internal(s, pkt);
853 av_packet_free(&pkt);
858 return avi_write_packet_internal(s, pkt);
861 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
863 unsigned char tag[5];
864 unsigned int flags = 0;
865 const int stream_index = pkt->stream_index;
866 int size = pkt->size;
867 AVIContext *avi = s->priv_data;
868 AVIOContext *pb = s->pb;
869 AVIStream *avist = s->streams[stream_index]->priv_data;
870 AVCodecParameters *par = s->streams[stream_index]->codecpar;
872 if (pkt->dts != AV_NOPTS_VALUE)
873 avist->last_dts = pkt->dts + pkt->duration;
875 avist->packet_count++;
877 // Make sure to put an OpenDML chunk when the file size exceeds the limits
878 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
879 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
881 ff_end_tag(pb, avi->movi_list);
883 if (avi->riff_id == 1)
886 ff_end_tag(pb, avi->riff_start);
887 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
890 avi_stream2fourcc(tag, stream_index, par->codec_type);
891 if (pkt->flags & AV_PKT_FLAG_KEY)
893 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
894 avist->audio_strm_length += size;
896 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
898 ret = avi_add_ientry(s, stream_index, NULL, flags, size);
903 avio_write(pb, tag, 4);
905 avio_write(pb, pkt->data, size);
912 static int avi_write_trailer(AVFormatContext *s)
914 AVIContext *avi = s->priv_data;
915 AVIOContext *pb = s->pb;
920 for (i = 0; i < s->nb_streams; i++) {
921 AVIStream *avist = s->streams[i]->priv_data;
922 write_skip_frames(s, i, avist->last_dts);
925 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
926 if (avi->riff_id == 1) {
927 ff_end_tag(pb, avi->movi_list);
928 res = avi_write_idx1(s);
929 ff_end_tag(pb, avi->riff_start);
932 ff_end_tag(pb, avi->movi_list);
933 ff_end_tag(pb, avi->riff_start);
935 file_size = avio_tell(pb);
936 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
937 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
940 for (n = nb_frames = 0; n < s->nb_streams; n++) {
941 AVCodecParameters *par = s->streams[n]->codecpar;
942 AVIStream *avist = s->streams[n]->priv_data;
944 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
945 if (nb_frames < avist->packet_count)
946 nb_frames = avist->packet_count;
948 if (par->codec_id == AV_CODEC_ID_MP2 ||
949 par->codec_id == AV_CODEC_ID_MP3)
950 nb_frames += avist->packet_count;
953 avio_wl32(pb, nb_frames);
954 avio_seek(pb, file_size, SEEK_SET);
956 avi_write_counters(s, avi->riff_id);
960 if (avi->riff_id >= avi->master_index_max_size) {
961 int index_space = AVI_MASTER_INDEX_PREFIX_SIZE +
962 AVI_MASTER_INDEX_ENTRY_SIZE * avi->riff_id;
963 av_log(s, AV_LOG_WARNING, "Output file not strictly OpenDML compliant, "
964 "consider re-muxing with 'reserve_index_space' option value >= %d\n",
968 for (i = 0; i < s->nb_streams; i++) {
969 AVIStream *avist = s->streams[i]->priv_data;
970 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
971 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
972 avio_wl32(pb, avist->max_size);
979 static void avi_deinit(AVFormatContext *s)
981 for (int i = 0; i < s->nb_streams; i++) {
982 AVIStream *avist = s->streams[i]->priv_data;
985 for (int j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
986 av_freep(&avist->indexes.cluster[j]);
987 av_freep(&avist->indexes.cluster);
988 avist->indexes.ents_allocated = avist->indexes.entry = 0;
992 #define OFFSET(x) offsetof(AVIContext, x)
993 #define ENC AV_OPT_FLAG_ENCODING_PARAM
994 static const AVOption options[] = {
995 { "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 },
996 { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
997 { "flipped_raw_rgb", "Raw RGB bitmaps are stored bottom-up", OFFSET(flipped_raw_rgb), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
1001 static const AVClass avi_muxer_class = {
1002 .class_name = "AVI muxer",
1003 .item_name = av_default_item_name,
1005 .version = LIBAVUTIL_VERSION_INT,
1008 AVOutputFormat ff_avi_muxer = {
1010 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
1011 .mime_type = "video/x-msvideo",
1012 .extensions = "avi",
1013 .priv_data_size = sizeof(AVIContext),
1014 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
1015 .video_codec = AV_CODEC_ID_MPEG4,
1017 .deinit = avi_deinit,
1018 .write_header = avi_write_header,
1019 .write_packet = avi_write_packet,
1020 .write_trailer = avi_write_trailer,
1021 .codec_tag = ff_riff_codec_tags_list,
1022 .priv_class = &avi_muxer_class,