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"
28 #include "config_components.h"
33 #include "libavformat/avlanguage.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/avutil.h"
36 #include "libavutil/internal.h"
37 #include "libavutil/dict.h"
38 #include "libavutil/avassert.h"
39 #include "libavutil/timestamp.h"
40 #include "libavutil/opt.h"
41 #include "libavutil/pixdesc.h"
42 #include "libavcodec/raw.h"
46 * - fill all fields if non streamed (nb_frames for example)
49 typedef struct AVIIentry {
56 #define AVI_INDEX_CLUSTER_SIZE 16384
57 #define AVI_MASTER_INDEX_PREFIX_SIZE (8+2+1+1+4+8+4+4)
58 #define AVI_MASTER_INDEX_ENTRY_SIZE 16 /* bytes per entry */
59 #define AVI_MASTER_INDEX_SIZE_DEFAULT 256 /* number of entries */
61 typedef struct AVIIndex {
63 int64_t audio_strm_offset;
66 int master_odml_riff_id_base;
70 typedef struct AVIContext {
72 AVPacket *empty_packet;
73 int64_t riff_start, movi_list, odml_list;
74 int64_t frames_hdr_all;
76 int reserve_index_space;
77 int master_index_max_size;
78 int write_channel_mask;
82 typedef struct AVIStream {
83 int64_t frames_hdr_strm;
84 int64_t audio_strm_length;
94 int64_t strh_flags_offset;
96 uint32_t palette[AVPALETTE_COUNT];
97 uint32_t old_palette[AVPALETTE_COUNT];
101 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
103 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
105 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
106 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
107 return &idx->cluster[cl][id];
110 static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,
111 unsigned int flags, unsigned int size)
113 AVIContext *avi = s->priv_data;
114 AVIOContext *pb = s->pb;
115 AVIStream *avist = s->streams[stream_index]->priv_data;
116 AVIIndex *idx = &avist->indexes;
117 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
118 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
120 if (idx->ents_allocated <= idx->entry) {
121 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
123 idx->ents_allocated = 0;
125 return AVERROR(ENOMEM);
128 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
129 if (!idx->cluster[cl])
130 return AVERROR(ENOMEM);
131 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
135 memcpy(idx->cluster[cl][id].tag, tag, 4);
137 memset(idx->cluster[cl][id].tag, 0, 4);
138 idx->cluster[cl][id].flags = flags;
139 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
140 idx->cluster[cl][id].len = size;
141 avist->max_size = FFMAX(avist->max_size, size);
147 static av_cold int avi_init(struct AVFormatContext *s)
149 AVIContext *avi = s->priv_data;
151 if (avi->reserve_index_space > 0) {
152 avi->master_index_max_size = (avi->reserve_index_space - AVI_MASTER_INDEX_PREFIX_SIZE) / AVI_MASTER_INDEX_ENTRY_SIZE;
153 avi->master_index_max_size = FFMAX(avi->master_index_max_size, 16);
155 avi->master_index_max_size = AVI_MASTER_INDEX_SIZE_DEFAULT;
156 av_log(s, AV_LOG_DEBUG, "reserve_index_space:%d master_index_max_size:%d\n",
157 avi->reserve_index_space, avi->master_index_max_size);
159 return 1; /* stream initialization continues in avi_write_header */
162 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
163 const char *riff_tag, const char *list_tag)
165 AVIContext *avi = s->priv_data;
170 for (i = 0; i < s->nb_streams; i++) {
171 AVIStream *avist = s->streams[i]->priv_data;
172 avist->indexes.audio_strm_offset = avist->audio_strm_length;
173 avist->indexes.entry = 0;
176 avi->riff_start = ff_start_tag(pb, "RIFF");
177 ffio_wfourcc(pb, riff_tag);
178 loff = ff_start_tag(pb, "LIST");
179 ffio_wfourcc(pb, list_tag);
183 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
185 tag[0] = '0' + index / 10;
186 tag[1] = '0' + index % 10;
187 if (type == AVMEDIA_TYPE_VIDEO) {
190 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
191 // note: this is not an official code
202 static int avi_write_counters(AVFormatContext *s, int riff_id)
204 AVIOContext *pb = s->pb;
205 AVIContext *avi = s->priv_data;
206 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
208 AVCodecParameters *par;
210 file_size = avio_tell(pb);
211 for (n = 0; n < s->nb_streams; n++) {
212 AVIStream *avist = s->streams[n]->priv_data;
214 av_assert0(avist->frames_hdr_strm);
215 par = s->streams[n]->codecpar;
216 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
217 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
219 avio_wl32(pb, avist->packet_count);
221 avio_wl32(pb, avist->audio_strm_length / au_ssize);
222 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
223 nb_frames = FFMAX(nb_frames, avist->packet_count);
226 av_assert0(avi->frames_hdr_all);
227 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
228 avio_wl32(pb, nb_frames);
230 avio_seek(pb, file_size, SEEK_SET);
235 static void write_odml_master(AVFormatContext *s, int stream_index)
237 AVIOContext *pb = s->pb;
238 AVIContext *avi = s->priv_data;
239 AVStream *st = s->streams[stream_index];
240 AVCodecParameters *par = st->codecpar;
241 AVIStream *avist = st->priv_data;
242 unsigned char tag[5];
244 /* Starting to lay out AVI OpenDML master index.
245 * We want to make it JUNK entry for now, since we'd
246 * like to get away without making AVI an OpenDML one
247 * for compatibility reasons. */
248 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
249 avio_wl16(pb, 4); /* wLongsPerEntry */
250 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
251 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
252 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
253 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));
255 ffio_fill(pb, 0, 3 * 4 /* dwReserved[3] */
256 + 16LL * avi->master_index_max_size);
257 ff_end_tag(pb, avist->indexes.indx_start);
260 static int avi_write_header(AVFormatContext *s)
262 AVIContext *avi = s->priv_data;
263 AVIOContext *pb = s->pb;
264 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
265 int64_t max_stream_duration = 0;
266 AVCodecParameters *video_par;
267 AVStream *video_st = NULL;
268 int64_t list1, list2, strh, strf;
269 AVDictionaryEntry *t = NULL;
272 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
273 av_log(s, AV_LOG_ERROR, "AVI does not support "
274 ">"AV_STRINGIFY(AVI_MAX_STREAM_COUNT)" streams\n");
275 return AVERROR(EINVAL);
278 avi->empty_packet = ffformatcontext(s)->pkt;
280 for (n = 0; n < s->nb_streams; n++) {
281 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
282 if (!s->streams[n]->priv_data)
283 return AVERROR(ENOMEM);
288 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
291 ffio_wfourcc(pb, "avih");
292 avio_wl32(pb, 14 * 4);
296 for (n = 0; n < s->nb_streams; n++) {
297 AVCodecParameters *par = s->streams[n]->codecpar;
298 AVStream *st = s->streams[n];
299 bitrate = FFMIN(bitrate + par->bit_rate, INT32_MAX);
300 if (st->duration > 0) {
301 int64_t stream_duration = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
302 max_stream_duration = FFMAX(stream_duration, max_stream_duration);
304 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
310 /* guess master index size based on bitrate and duration */
311 if (!avi->reserve_index_space) {
312 double duration_est, filesize_est;
314 duration_est = (double)s->duration / AV_TIME_BASE;
315 else if (max_stream_duration > 0)
316 duration_est = (double)max_stream_duration / AV_TIME_BASE;
318 duration_est = 10 * 60 * 60; /* default to 10 hours */
319 filesize_est = duration_est * (bitrate / 8) * 1.10; /* add 10% safety margin for muxer+bitrate */
320 avi->master_index_max_size = FFMAX((int)ceil(filesize_est / AVI_MAX_RIFF_SIZE) + 1,
321 avi->master_index_max_size);
322 av_log(s, AV_LOG_DEBUG, "duration_est:%0.3f, filesize_est:%0.1fGiB, master_index_max_size:%d\n",
323 duration_est, filesize_est / (1024*1024*1024), avi->master_index_max_size);
328 // TODO: should be avg_frame_rate
330 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
331 video_st->time_base.den));
334 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
335 avio_wl32(pb, 0); /* padding */
336 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
337 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
339 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
340 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
341 avio_wl32(pb, nb_frames); /* nb frames, filled later */
342 avio_wl32(pb, 0); /* initial frame */
343 avio_wl32(pb, s->nb_streams); /* nb streams */
344 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
346 avio_wl32(pb, video_par->width);
347 avio_wl32(pb, video_par->height);
352 ffio_fill(pb, 0, 4 * 4); /* 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 if (par->width > 65535 || par->height > 65535) {
431 av_log(s, AV_LOG_ERROR, "%dx%d dimensions are too big\n", par->width, par->height);
432 return AVERROR(EINVAL);
434 avio_wl16(pb, par->width);
435 avio_wl16(pb, par->height);
436 ff_end_tag(pb, strh);
438 if (par->codec_type != AVMEDIA_TYPE_DATA) {
440 enum AVPixelFormat pix_fmt;
442 strf = ff_start_tag(pb, "strf");
443 switch (par->codec_type) {
444 case AVMEDIA_TYPE_SUBTITLE:
445 /* XSUB subtitles behave like video tracks, other subtitles
446 * are not (yet) supported. */
447 if (par->codec_id != AV_CODEC_ID_XSUB)
449 case AVMEDIA_TYPE_VIDEO:
450 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
452 && par->codec_id == AV_CODEC_ID_RAWVIDEO
453 && par->format == AV_PIX_FMT_RGB555LE
454 && par->bits_per_coded_sample == 15)
455 par->bits_per_coded_sample = 16;
456 avist->pal_offset = avio_tell(pb) + 40;
457 ff_put_bmp_header(pb, par, 0, 0, avi->flipped_raw_rgb);
458 pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_AVI,
459 par->bits_per_coded_sample);
461 && par->codec_id == AV_CODEC_ID_RAWVIDEO
462 && par->format != pix_fmt
463 && par->format != AV_PIX_FMT_NONE)
464 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
465 av_get_pix_fmt_name(par->format));
467 if (par->format == AV_PIX_FMT_PAL8) {
468 if (par->bits_per_coded_sample < 0 || par->bits_per_coded_sample > 8) {
469 av_log(s, AV_LOG_ERROR, "PAL8 with %d bps is not allowed\n", par->bits_per_coded_sample);
470 return AVERROR(EINVAL);
475 case AVMEDIA_TYPE_AUDIO:
476 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
477 if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)
481 av_log(s, AV_LOG_ERROR,
482 "Invalid or not supported codec type '%s' found in the input\n",
483 (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));
484 return AVERROR(EINVAL);
486 ff_end_tag(pb, strf);
487 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
488 ff_riff_write_info_tag(s->pb, "strn", t->value);
491 if (par->codec_id == AV_CODEC_ID_XSUB
492 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
493 const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);
496 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
498 return AVERROR(ENOMEM);
499 ff_riff_write_info_tag(s->pb, "strn", str);
505 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
506 write_odml_master(s, i);
509 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
510 st->sample_aspect_ratio.num > 0 &&
511 st->sample_aspect_ratio.den > 0) {
512 int vprp = ff_start_tag(pb, "vprp");
513 AVRational dar = av_mul_q(st->sample_aspect_ratio,
514 (AVRational) { par->width,
516 int num, den, fields, i;
517 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
518 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_BB ||
519 par->field_order == AV_FIELD_TB || par->field_order == AV_FIELD_BT) {
520 fields = 2; // interlaced
522 fields = 1; // progressive
525 avio_wl32(pb, 0); // video format = unknown
526 avio_wl32(pb, 0); // video standard = unknown
527 // TODO: should be avg_frame_rate
528 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
529 avio_wl32(pb, par->width);
530 avio_wl32(pb, par->height);
533 avio_wl32(pb, par->width);
534 avio_wl32(pb, par->height);
535 avio_wl32(pb, fields); // fields per frame
537 for (i = 0; i < fields; i++) {
539 // OpenDML v1.02 is not very specific on what value to use for
540 // start_line when frame data is not coming from a capturing device,
541 // so just use 0/1 depending on the field order for interlaced frames
542 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_TB) {
543 start_line = (i == 0) ? 0 : 1;
544 } else if (par->field_order == AV_FIELD_BB || par->field_order == AV_FIELD_BT) {
545 start_line = (i == 0) ? 1 : 0;
550 avio_wl32(pb, par->height / fields); // compressed bitmap height
551 avio_wl32(pb, par->width); // compressed bitmap width
552 avio_wl32(pb, par->height / fields); // valid bitmap height
553 avio_wl32(pb, par->width); // valid bitmap width
554 avio_wl32(pb, 0); // valid bitmap X offset
555 avio_wl32(pb, 0); // valid bitmap Y offset
556 avio_wl32(pb, 0); // valid X offset in T
557 avio_wl32(pb, start_line); // valid Y start line
559 ff_end_tag(pb, vprp);
562 ff_end_tag(pb, list2);
565 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
566 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
567 avi->odml_list = ff_start_tag(pb, "JUNK");
568 ffio_wfourcc(pb, "odml");
569 ffio_wfourcc(pb, "dmlh");
571 ffio_fill(pb, 0, 248);
572 ff_end_tag(pb, avi->odml_list);
575 ff_end_tag(pb, list1);
577 ff_riff_write_info(s);
580 padding = s->metadata_header_padding;
584 /* some padding for easier tag editing */
586 list2 = ff_start_tag(pb, "JUNK");
587 ffio_fill(pb, 0, FFALIGN((uint32_t)padding, 4));
588 ff_end_tag(pb, list2);
591 avi->movi_list = ff_start_tag(pb, "LIST");
592 ffio_wfourcc(pb, "movi");
597 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
599 AVIOContext *pb = s->pb;
600 AVIContext *avi = s->priv_data;
601 AVIStream *avist = s->streams[stream_index]->priv_data;
603 int au_byterate, au_ssize, au_scale;
607 /* Updating one entry in the AVI OpenDML master index */
608 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
609 ffio_wfourcc(pb, "indx"); /* enabling this entry */
611 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
612 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
613 avio_wl64(pb, ix); /* qwOffset */
614 avio_wl32(pb, size); /* dwSize */
615 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
616 if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
617 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
618 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
619 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
620 avist->sample_requested = 1;
622 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
624 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
626 avio_seek(pb, pos, SEEK_SET);
629 static int avi_write_ix(AVFormatContext *s)
631 AVIOContext *pb = s->pb;
632 AVIContext *avi = s->priv_data;
634 char ix_tag[] = "ix00";
637 av_assert0(pb->seekable & AVIO_SEEKABLE_NORMAL);
639 for (i = 0; i < s->nb_streams; i++) {
640 AVIStream *avist = s->streams[i]->priv_data;
641 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == avi->master_index_max_size) {
643 int size = AVI_MASTER_INDEX_PREFIX_SIZE + AVI_MASTER_INDEX_ENTRY_SIZE * avi->master_index_max_size;
646 update_odml_entry(s, i, pos, size);
647 write_odml_master(s, i);
648 av_assert1(avio_tell(pb) - pos == size);
649 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
651 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < avi->master_index_max_size);
654 for (i = 0; i < s->nb_streams; i++) {
655 AVIStream *avist = s->streams[i]->priv_data;
658 avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);
661 /* Writing AVI OpenDML leaf index chunk */
663 ffio_wfourcc(pb, ix_tag); /* ix?? */
664 avio_wl32(pb, avist->indexes.entry * 8 + 24);
666 avio_wl16(pb, 2); /* wLongsPerEntry */
667 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
668 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
669 avio_wl32(pb, avist->indexes.entry);
671 ffio_wfourcc(pb, tag); /* dwChunkId */
672 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
673 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
675 for (j = 0; j < avist->indexes.entry; j++) {
676 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
677 avio_wl32(pb, ie->pos + 8);
678 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
679 (ie->flags & 0x10 ? 0 : 0x80000000));
682 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
687 static int avi_write_idx1(AVFormatContext *s)
689 AVIOContext *pb = s->pb;
690 AVIContext *avi = s->priv_data;
695 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
697 AVIIentry *ie = 0, *tie;
698 int empty, stream_id = -1;
700 idx_chunk = ff_start_tag(pb, "idx1");
701 for (i = 0; i < s->nb_streams; i++) {
702 avist = s->streams[i]->priv_data;
708 for (i = 0; i < s->nb_streams; i++) {
709 avist = s->streams[i]->priv_data;
710 if (avist->indexes.entry <= avist->entry)
713 tie = avi_get_ientry(&avist->indexes, avist->entry);
714 if (empty || tie->pos < ie->pos) {
721 avist = s->streams[stream_id]->priv_data;
723 ffio_wfourcc(pb, ie->tag);
725 avi_stream2fourcc(tag, stream_id,
726 s->streams[stream_id]->codecpar->codec_type);
727 ffio_wfourcc(pb, tag);
729 avio_wl32(pb, ie->flags);
730 avio_wl32(pb, ie->pos);
731 avio_wl32(pb, ie->len);
735 ff_end_tag(pb, idx_chunk);
737 avi_write_counters(s, avi->riff_id);
742 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
744 AVIContext *avi = s->priv_data;
745 AVIStream *avist = s->streams[stream_index]->priv_data;
746 AVCodecParameters *par = s->streams[stream_index]->codecpar;
748 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
749 while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&
750 dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
752 if (dts - avist->packet_count > 60000) {
753 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
754 return AVERROR(EINVAL);
757 avi->empty_packet->stream_index = stream_index;
758 avi_write_packet_internal(s, avi->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 },
996 { "flipped_raw_rgb", "Raw RGB bitmaps are stored bottom-up", OFFSET(flipped_raw_rgb), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
1000 static const AVClass avi_muxer_class = {
1001 .class_name = "AVI muxer",
1002 .item_name = av_default_item_name,
1004 .version = LIBAVUTIL_VERSION_INT,
1007 const FFOutputFormat ff_avi_muxer = {
1009 .p.long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
1010 .p.mime_type = "video/x-msvideo",
1011 .p.extensions = "avi",
1012 .priv_data_size = sizeof(AVIContext),
1013 .p.audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
1014 .p.video_codec = AV_CODEC_ID_MPEG4,
1016 .deinit = avi_deinit,
1017 .write_header = avi_write_header,
1018 .write_packet = avi_write_packet,
1019 .write_trailer = avi_write_trailer,
1020 .p.codec_tag = ff_riff_codec_tags_list,
1021 .p.priv_class = &avi_muxer_class,