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1/*
2 * AVI muxer
3 * Copyright (c) 2000 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
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.
11 *
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.
16 *
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
20 */
21
22//#define DEBUG
23
24#include <math.h>
25
26#include "avformat.h"
27#include "internal.h"
28#include "avi.h"
29#include "avio_internal.h"
30#include "riff.h"
31#include "mpegts.h"
32#include "libavformat/avlanguage.h"
33#include "libavutil/avstring.h"
34#include "libavutil/avutil.h"
35#include "libavutil/internal.h"
36#include "libavutil/intreadwrite.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"
43
44/*
45 * TODO:
46 * - fill all fields if non streamed (nb_frames for example)
47 */
48
49typedef struct AVIIentry {
50 char tag[4];
51 unsigned int flags;
52 unsigned int pos;
53 unsigned int len;
54} AVIIentry;
55
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 */
60
61typedef struct AVIIndex {
62 int64_t indx_start;
63 int64_t audio_strm_offset;
64 int entry;
65 int ents_allocated;
66 int master_odml_riff_id_base;
67 AVIIentry** cluster;
68} AVIIndex;
69
70typedef struct AVIContext {
71 const AVClass *class;
72 int64_t riff_start, movi_list, odml_list;
73 int64_t frames_hdr_all;
74 int riff_id;
75 int reserve_index_space;
76 int master_index_max_size;
77 int write_channel_mask;
78} AVIContext;
79
80typedef struct AVIStream {
81 int64_t frames_hdr_strm;
82 int64_t audio_strm_length;
83 int packet_count;
84 int entry;
85 int max_size;
86 int sample_requested;
87
88 int64_t last_dts;
89
90 AVIIndex indexes;
91
92 int64_t strh_flags_offset;
93
94 uint32_t palette[AVPALETTE_COUNT];
95 uint32_t old_palette[AVPALETTE_COUNT];
96 int64_t pal_offset;
97} AVIStream;
98
99static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
100
101static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
102{
103 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
104 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
105 return &idx->cluster[cl][id];
106}
107
108static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,
109 unsigned int flags, unsigned int size)
110{
111 AVIContext *avi = s->priv_data;
112 AVIOContext *pb = s->pb;
113 AVIStream *avist = s->streams[stream_index]->priv_data;
114 AVIIndex *idx = &avist->indexes;
115 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
116 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
117
118 if (idx->ents_allocated <= idx->entry) {
119 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
120 if (!idx->cluster) {
121 idx->ents_allocated = 0;
122 idx->entry = 0;
123 return AVERROR(ENOMEM);
124 }
125 idx->cluster[cl] =
126 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
127 if (!idx->cluster[cl])
128 return AVERROR(ENOMEM);
129 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
130 }
131
132 if (tag)
133 memcpy(idx->cluster[cl][id].tag, tag, 4);
134 else
135 memset(idx->cluster[cl][id].tag, 0, 4);
136 idx->cluster[cl][id].flags = flags;
137 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
138 idx->cluster[cl][id].len = size;
139 avist->max_size = FFMAX(avist->max_size, size);
140 idx->entry++;
141
142 return 0;
143}
144
145static av_cold int avi_init(struct AVFormatContext *s)
146{
147 AVIContext *avi = s->priv_data;
148
149 if (avi->reserve_index_space > 0) {
150 avi->master_index_max_size = (avi->reserve_index_space - AVI_MASTER_INDEX_PREFIX_SIZE) / AVI_MASTER_INDEX_ENTRY_SIZE;
151 avi->master_index_max_size = FFMAX(avi->master_index_max_size, 16);
152 } else
153 avi->master_index_max_size = AVI_MASTER_INDEX_SIZE_DEFAULT;
154 av_log(s, AV_LOG_DEBUG, "reserve_index_space:%d master_index_max_size:%d\n",
155 avi->reserve_index_space, avi->master_index_max_size);
156
157 return 1; /* stream initialization continues in avi_write_header */
158}
159
160static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
161 const char *riff_tag, const char *list_tag)
162{
163 AVIContext *avi = s->priv_data;
164 int64_t loff;
165 int i;
166
167 avi->riff_id++;
168 for (i = 0; i < s->nb_streams; i++) {
169 AVIStream *avist = s->streams[i]->priv_data;
170 avist->indexes.audio_strm_offset = avist->audio_strm_length;
171 avist->indexes.entry = 0;
172 }
173
174 avi->riff_start = ff_start_tag(pb, "RIFF");
175 ffio_wfourcc(pb, riff_tag);
176 loff = ff_start_tag(pb, "LIST");
177 ffio_wfourcc(pb, list_tag);
178 return loff;
179}
180
181static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
182{
183 tag[0] = '0' + index / 10;
184 tag[1] = '0' + index % 10;
185 if (type == AVMEDIA_TYPE_VIDEO) {
186 tag[2] = 'd';
187 tag[3] = 'c';
188 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
189 // note: this is not an official code
190 tag[2] = 's';
191 tag[3] = 'b';
192 } else {
193 tag[2] = 'w';
194 tag[3] = 'b';
195 }
196 tag[4] = '\0';
197 return tag;
198}
199
200static int avi_write_counters(AVFormatContext *s, int riff_id)
201{
202 AVIOContext *pb = s->pb;
203 AVIContext *avi = s->priv_data;
204 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
205 int64_t file_size;
206 AVCodecParameters *par;
207
208 file_size = avio_tell(pb);
209 for (n = 0; n < s->nb_streams; n++) {
210 AVIStream *avist = s->streams[n]->priv_data;
211
212 av_assert0(avist->frames_hdr_strm);
213 par = s->streams[n]->codecpar;
214 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
215 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
216 if (au_ssize == 0)
217 avio_wl32(pb, avist->packet_count);
218 else
219 avio_wl32(pb, avist->audio_strm_length / au_ssize);
220 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
221 nb_frames = FFMAX(nb_frames, avist->packet_count);
222 }
223 if (riff_id == 1) {
224 av_assert0(avi->frames_hdr_all);
225 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
226 avio_wl32(pb, nb_frames);
227 }
228 avio_seek(pb, file_size, SEEK_SET);
229
230 return 0;
231}
232
233static void write_odml_master(AVFormatContext *s, int stream_index)
234{
235 AVIOContext *pb = s->pb;
236 AVIContext *avi = s->priv_data;
237 AVStream *st = s->streams[stream_index];
238 AVCodecParameters *par = st->codecpar;
239 AVIStream *avist = st->priv_data;
240 unsigned char tag[5];
241 int j;
242
243 /* Starting to lay out AVI OpenDML master index.
244 * We want to make it JUNK entry for now, since we'd
245 * like to get away without making AVI an OpenDML one
246 * for compatibility reasons. */
247 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
248 avio_wl16(pb, 4); /* wLongsPerEntry */
249 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
250 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
251 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
252 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));
253 /* dwChunkId */
254 avio_wl64(pb, 0); /* dwReserved[3] */
255 avio_wl32(pb, 0); /* Must be 0. */
256 for (j = 0; j < avi->master_index_max_size * 2; j++)
257 avio_wl64(pb, 0);
258 ff_end_tag(pb, avist->indexes.indx_start);
259}
260
261static int avi_write_header(AVFormatContext *s)
262{
263 AVIContext *avi = s->priv_data;
264 AVIOContext *pb = s->pb;
265 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
266 int64_t max_stream_duration = 0;
267 AVCodecParameters *video_par;
268 AVStream *video_st = NULL;
269 int64_t list1, list2, strh, strf;
270 AVDictionaryEntry *t = NULL;
271 int padding;
272
273 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
274 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
275 AVI_MAX_STREAM_COUNT);
276 return AVERROR(EINVAL);
277 }
278
279 for (n = 0; n < s->nb_streams; n++) {
280 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
281 if (!s->streams[n]->priv_data)
282 return AVERROR(ENOMEM);
283 }
284
285 /* header list */
286 avi->riff_id = 0;
287 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
288
289 /* avi header */
290 ffio_wfourcc(pb, "avih");
291 avio_wl32(pb, 14 * 4);
292 bitrate = 0;
293
294 video_par = NULL;
295 for (n = 0; n < s->nb_streams; n++) {
296 AVCodecParameters *par = s->streams[n]->codecpar;
297 AVStream *st = s->streams[n];
298 bitrate = FFMIN(bitrate + par->bit_rate, INT32_MAX);
299 if (st->duration > 0) {
300 int64_t stream_duration = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
301 max_stream_duration = FFMAX(stream_duration, max_stream_duration);
302 }
303 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
304 video_par = par;
305 video_st = st;
306 }
307 }
308
309 /* guess master index size based on bitrate and duration */
310 if (!avi->reserve_index_space) {
311 double duration_est, filesize_est;
312 if (s->duration > 0)
313 duration_est = (double)s->duration / AV_TIME_BASE;
314 else if (max_stream_duration > 0)
315 duration_est = (double)max_stream_duration / AV_TIME_BASE;
316 else
317 duration_est = 10 * 60 * 60; /* default to 10 hours */
318 filesize_est = duration_est * (bitrate / 8) * 1.10; /* add 10% safety margin for muxer+bitrate */
319 avi->master_index_max_size = FFMAX((int)ceil(filesize_est / AVI_MAX_RIFF_SIZE) + 1,
320 avi->master_index_max_size);
321 av_log(s, AV_LOG_DEBUG, "duration_est:%0.3f, filesize_est:%0.1fGiB, master_index_max_size:%d\n",
322 duration_est, filesize_est / (1024*1024*1024), avi->master_index_max_size);
323 }
324
325 nb_frames = 0;
326
327 // TODO: should be avg_frame_rate
328 if (video_st)
329 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
330 video_st->time_base.den));
331 else
332 avio_wl32(pb, 0);
333 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
334 avio_wl32(pb, 0); /* padding */
335 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
336 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
337 else
338 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
339 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
340 avio_wl32(pb, nb_frames); /* nb frames, filled later */
341 avio_wl32(pb, 0); /* initial frame */
342 avio_wl32(pb, s->nb_streams); /* nb streams */
343 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
344 if (video_par) {
345 avio_wl32(pb, video_par->width);
346 avio_wl32(pb, video_par->height);
347 } else {
348 avio_wl32(pb, 0);
349 avio_wl32(pb, 0);
350 }
351 avio_wl32(pb, 0); /* reserved */
352 avio_wl32(pb, 0); /* reserved */
353 avio_wl32(pb, 0); /* reserved */
354 avio_wl32(pb, 0); /* reserved */
355
356 /* stream list */
357 for (i = 0; i < n; i++) {
358 AVStream *st = s->streams[i];
359 AVCodecParameters *par = st->codecpar;
360 AVIStream *avist = st->priv_data;
361 list2 = ff_start_tag(pb, "LIST");
362 ffio_wfourcc(pb, "strl");
363
364 /* stream generic header */
365 strh = ff_start_tag(pb, "strh");
366 switch (par->codec_type) {
367 case AVMEDIA_TYPE_SUBTITLE:
368 // XSUB subtitles behave like video tracks, other subtitles
369 // are not (yet) supported.
370 if (par->codec_id != AV_CODEC_ID_XSUB) {
371 avpriv_report_missing_feature(s, "Subtitle streams other than DivX XSUB");
372 return AVERROR_PATCHWELCOME;
373 }
374 case AVMEDIA_TYPE_VIDEO:
375 ffio_wfourcc(pb, "vids");
376 break;
377 case AVMEDIA_TYPE_AUDIO:
378 ffio_wfourcc(pb, "auds");
379 break;
380// case AVMEDIA_TYPE_TEXT:
381// ffio_wfourcc(pb, "txts");
382// break;
383 case AVMEDIA_TYPE_DATA:
384 ffio_wfourcc(pb, "dats");
385 break;
386 }
387 if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
388 par->codec_id == AV_CODEC_ID_XSUB)
389 avio_wl32(pb, par->codec_tag);
390 else
391 avio_wl32(pb, 1);
392 avist->strh_flags_offset = avio_tell(pb);
393 avio_wl32(pb, 0); /* flags */
394 avio_wl16(pb, 0); /* priority */
395 avio_wl16(pb, 0); /* language */
396 avio_wl32(pb, 0); /* initial frame */
397
398 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
399
400 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
401 && par->codec_id != AV_CODEC_ID_XSUB
402 && au_byterate > 1000LL*au_scale) {
403 au_byterate = 600;
404 au_scale = 1;
405 }
406 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
407 if (par->codec_id == AV_CODEC_ID_XSUB)
408 au_scale = au_byterate = 0;
409
410 avio_wl32(pb, au_scale); /* scale */
411 avio_wl32(pb, au_byterate); /* rate */
412
413 avio_wl32(pb, 0); /* start */
414 /* remember this offset to fill later */
415 avist->frames_hdr_strm = avio_tell(pb);
416 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
417 /* FIXME: this may be broken, but who cares */
418 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
419 else
420 avio_wl32(pb, 0); /* length, XXX: filled later */
421
422 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
423 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
424 avio_wl32(pb, 1024 * 1024);
425 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
426 avio_wl32(pb, 12 * 1024);
427 else
428 avio_wl32(pb, 0);
429 avio_wl32(pb, -1); /* quality */
430 avio_wl32(pb, au_ssize); /* sample size */
431 avio_wl32(pb, 0);
432 avio_wl16(pb, par->width);
433 avio_wl16(pb, par->height);
434 ff_end_tag(pb, strh);
435
436 if (par->codec_type != AVMEDIA_TYPE_DATA) {
437 int ret, flags;
438 enum AVPixelFormat pix_fmt;
439
440 strf = ff_start_tag(pb, "strf");
441 switch (par->codec_type) {
442 case AVMEDIA_TYPE_SUBTITLE:
443 /* XSUB subtitles behave like video tracks, other subtitles
444 * are not (yet) supported. */
445 if (par->codec_id != AV_CODEC_ID_XSUB)
446 break;
447 case AVMEDIA_TYPE_VIDEO:
448 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
449 if ( !par->codec_tag
450 && par->codec_id == AV_CODEC_ID_RAWVIDEO
451 && par->format == AV_PIX_FMT_RGB555LE
452 && par->bits_per_coded_sample == 15)
453 par->bits_per_coded_sample = 16;
454 avist->pal_offset = avio_tell(pb) + 40;
455 ff_put_bmp_header(pb, par, ff_codec_bmp_tags, 0, 0);
456 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
457 par->bits_per_coded_sample);
458 if ( !par->codec_tag
459 && par->codec_id == AV_CODEC_ID_RAWVIDEO
460 && par->format != pix_fmt
461 && par->format != AV_PIX_FMT_NONE)
462 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
463 av_get_pix_fmt_name(par->format));
464 break;
465 case AVMEDIA_TYPE_AUDIO:
466 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
467 if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)
468 return ret;
469 break;
470 default:
471 av_log(s, AV_LOG_ERROR,
472 "Invalid or not supported codec type '%s' found in the input\n",
473 (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));
474 return AVERROR(EINVAL);
475 }
476 ff_end_tag(pb, strf);
477 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
478 ff_riff_write_info_tag(s->pb, "strn", t->value);
479 t = NULL;
480 }
481 if (par->codec_id == AV_CODEC_ID_XSUB
482 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
483 const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);
484 t = NULL;
485 if (langstr) {
486 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
487 if (!str)
488 return AVERROR(ENOMEM);
489 ff_riff_write_info_tag(s->pb, "strn", str);
490 av_free(str);
491 }
492 }
493 }
494
495 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
496 write_odml_master(s, i);
497 }
498
499 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
500 st->sample_aspect_ratio.num > 0 &&
501 st->sample_aspect_ratio.den > 0) {
502 int vprp = ff_start_tag(pb, "vprp");
503 AVRational dar = av_mul_q(st->sample_aspect_ratio,
504 (AVRational) { par->width,
505 par->height });
506 int num, den;
507 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
508
509 avio_wl32(pb, 0); // video format = unknown
510 avio_wl32(pb, 0); // video standard = unknown
511 // TODO: should be avg_frame_rate
512 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
513 avio_wl32(pb, par->width);
514 avio_wl32(pb, par->height);
515 avio_wl16(pb, den);
516 avio_wl16(pb, num);
517 avio_wl32(pb, par->width);
518 avio_wl32(pb, par->height);
519 avio_wl32(pb, 1); // progressive FIXME
520
521 avio_wl32(pb, par->height);
522 avio_wl32(pb, par->width);
523 avio_wl32(pb, par->height);
524 avio_wl32(pb, par->width);
525 avio_wl32(pb, 0);
526 avio_wl32(pb, 0);
527
528 avio_wl32(pb, 0);
529 avio_wl32(pb, 0);
530 ff_end_tag(pb, vprp);
531 }
532
533 ff_end_tag(pb, list2);
534 }
535
536 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
537 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
538 avi->odml_list = ff_start_tag(pb, "JUNK");
539 ffio_wfourcc(pb, "odml");
540 ffio_wfourcc(pb, "dmlh");
541 avio_wl32(pb, 248);
542 for (i = 0; i < 248; i += 4)
543 avio_wl32(pb, 0);
544 ff_end_tag(pb, avi->odml_list);
545 }
546
547 ff_end_tag(pb, list1);
548
549 ff_riff_write_info(s);
550
551
552 padding = s->metadata_header_padding;
553 if (padding < 0)
554 padding = 1016;
555
556 /* some padding for easier tag editing */
557 if (padding) {
558 list2 = ff_start_tag(pb, "JUNK");
559 for (i = padding; i > 0; i -= 4)
560 avio_wl32(pb, 0);
561 ff_end_tag(pb, list2);
562 }
563
564 avi->movi_list = ff_start_tag(pb, "LIST");
565 ffio_wfourcc(pb, "movi");
566
567 avio_flush(pb);
568
569 return 0;
570}
571
572static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
573{
574 AVIOContext *pb = s->pb;
575 AVIContext *avi = s->priv_data;
576 AVIStream *avist = s->streams[stream_index]->priv_data;
577 int64_t pos;
578 int au_byterate, au_ssize, au_scale;
579
580 avio_flush(pb);
581 pos = avio_tell(pb);
582
583 /* Updating one entry in the AVI OpenDML master index */
584 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
585 ffio_wfourcc(pb, "indx"); /* enabling this entry */
586 avio_skip(pb, 8);
587 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
588 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
589 avio_wl64(pb, ix); /* qwOffset */
590 avio_wl32(pb, size); /* dwSize */
591 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
592 if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
593 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
594 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
595 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
596 avist->sample_requested = 1;
597 }
598 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
599 } else
600 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
601
602 avio_seek(pb, pos, SEEK_SET);
603}
604
605static int avi_write_ix(AVFormatContext *s)
606{
607 AVIOContext *pb = s->pb;
608 AVIContext *avi = s->priv_data;
609 char tag[5];
610 char ix_tag[] = "ix00";
611 int i, j;
612
613 av_assert0(pb->seekable & AVIO_SEEKABLE_NORMAL);
614
615 for (i = 0; i < s->nb_streams; i++) {
616 AVIStream *avist = s->streams[i]->priv_data;
617 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == avi->master_index_max_size) {
618 int64_t pos;
619 int size = AVI_MASTER_INDEX_PREFIX_SIZE + AVI_MASTER_INDEX_ENTRY_SIZE * avi->master_index_max_size;
620
621 pos = avio_tell(pb);
622 update_odml_entry(s, i, pos, size);
623 write_odml_master(s, i);
624 av_assert1(avio_tell(pb) - pos == size);
625 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
626 }
627 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < avi->master_index_max_size);
628 }
629
630 for (i = 0; i < s->nb_streams; i++) {
631 AVIStream *avist = s->streams[i]->priv_data;
632 int64_t ix;
633
634 avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);
635 ix_tag[3] = '0' + i;
636
637 /* Writing AVI OpenDML leaf index chunk */
638 ix = avio_tell(pb);
639 ffio_wfourcc(pb, ix_tag); /* ix?? */
640 avio_wl32(pb, avist->indexes.entry * 8 + 24);
641 /* chunk size */
642 avio_wl16(pb, 2); /* wLongsPerEntry */
643 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
644 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
645 avio_wl32(pb, avist->indexes.entry);
646 /* nEntriesInUse */
647 ffio_wfourcc(pb, tag); /* dwChunkId */
648 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
649 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
650
651 for (j = 0; j < avist->indexes.entry; j++) {
652 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
653 avio_wl32(pb, ie->pos + 8);
654 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
655 (ie->flags & 0x10 ? 0 : 0x80000000));
656 }
657
658 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
659 }
660 return 0;
661}
662
663static int avi_write_idx1(AVFormatContext *s)
664{
665 AVIOContext *pb = s->pb;
666 AVIContext *avi = s->priv_data;
667 int64_t idx_chunk;
668 int i;
669 char tag[5];
670
671 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
672 AVIStream *avist;
673 AVIIentry *ie = 0, *tie;
674 int empty, stream_id = -1;
675
676 idx_chunk = ff_start_tag(pb, "idx1");
677 for (i = 0; i < s->nb_streams; i++) {
678 avist = s->streams[i]->priv_data;
679 avist->entry = 0;
680 }
681
682 do {
683 empty = 1;
684 for (i = 0; i < s->nb_streams; i++) {
685 avist = s->streams[i]->priv_data;
686 if (avist->indexes.entry <= avist->entry)
687 continue;
688
689 tie = avi_get_ientry(&avist->indexes, avist->entry);
690 if (empty || tie->pos < ie->pos) {
691 ie = tie;
692 stream_id = i;
693 }
694 empty = 0;
695 }
696 if (!empty) {
697 avist = s->streams[stream_id]->priv_data;
698 if (*ie->tag)
699 ffio_wfourcc(pb, ie->tag);
700 else {
701 avi_stream2fourcc(tag, stream_id,
702 s->streams[stream_id]->codecpar->codec_type);
703 ffio_wfourcc(pb, tag);
704 }
705 avio_wl32(pb, ie->flags);
706 avio_wl32(pb, ie->pos);
707 avio_wl32(pb, ie->len);
708 avist->entry++;
709 }
710 } while (!empty);
711 ff_end_tag(pb, idx_chunk);
712
713 avi_write_counters(s, avi->riff_id);
714 }
715 return 0;
716}
717
718static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
719{
720 AVIStream *avist = s->streams[stream_index]->priv_data;
721 AVCodecParameters *par = s->streams[stream_index]->codecpar;
722
723 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
724 while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&
725 dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
726 AVPacket empty_packet;
727
728 if (dts - avist->packet_count > 60000) {
729 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
730 return AVERROR(EINVAL);
731 }
732
733 av_init_packet(&empty_packet);
734 empty_packet.size = 0;
735 empty_packet.data = NULL;
736 empty_packet.stream_index = stream_index;
737 avi_write_packet_internal(s, &empty_packet);
738 ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
739 }
740
741 return 0;
742}
743
744static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
745{
746 const int stream_index = pkt->stream_index;
747 AVCodecParameters *par = s->streams[stream_index]->codecpar;
748 int ret;
749
750 if (par->codec_id == AV_CODEC_ID_H264 && par->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
751 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
752 if (ret < 0)
753 return ret;
754 }
755
756 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
757 return ret;
758
759 if (!pkt->size)
760 return avi_write_packet_internal(s, pkt); /* Passthrough */
761
762 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
763 AVIStream *avist = s->streams[stream_index]->priv_data;
764 AVIOContext *pb = s->pb;
765 AVPacket *opkt = pkt;
766 int reshuffle_ret;
767 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && par->codec_tag == 0) {
768 int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;
769 int expected_stride = ((par->width * bpc + 31) >> 5)*4;
770 reshuffle_ret = ff_reshuffle_raw_rgb(s, &pkt, par, expected_stride);
771 if (reshuffle_ret < 0)
772 return reshuffle_ret;
773 } else
774 reshuffle_ret = 0;
775 if (par->format == AV_PIX_FMT_PAL8) {
776 ret = ff_get_packet_palette(s, opkt, reshuffle_ret, avist->palette);
777 if (ret < 0)
778 goto fail;
779 if (ret) {
780 int pal_size = 1 << par->bits_per_coded_sample;
781 int pc_tag, i;
782
783 av_assert0(par->bits_per_coded_sample >= 0 && par->bits_per_coded_sample <= 8);
784
785 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && avist->pal_offset) {
786 int64_t cur_offset = avio_tell(pb);
787 avio_seek(pb, avist->pal_offset, SEEK_SET);
788 for (i = 0; i < pal_size; i++) {
789 uint32_t v = avist->palette[i];
790 avio_wl32(pb, v & 0xffffff);
791 }
792 avio_seek(pb, cur_offset, SEEK_SET);
793 memcpy(avist->old_palette, avist->palette, pal_size * 4);
794 avist->pal_offset = 0;
795 }
796 if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {
797 unsigned char tag[5];
798 avi_stream2fourcc(tag, stream_index, par->codec_type);
799 tag[2] = 'p'; tag[3] = 'c';
800 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
801 if (avist->strh_flags_offset) {
802 int64_t cur_offset = avio_tell(pb);
803 avio_seek(pb, avist->strh_flags_offset, SEEK_SET);
804 avio_wl32(pb, AVISF_VIDEO_PALCHANGES);
805 avio_seek(pb, cur_offset, SEEK_SET);
806 avist->strh_flags_offset = 0;
807 }
808 ret = avi_add_ientry(s, stream_index, tag, AVIIF_NO_TIME,
809 pal_size * 4 + 4);
810 if (ret < 0)
811 goto fail;
812 }
813 pc_tag = ff_start_tag(pb, tag);
814 avio_w8(pb, 0);
815 avio_w8(pb, pal_size & 0xFF);
816 avio_wl16(pb, 0); // reserved
817 for (i = 0; i < pal_size; i++) {
818 uint32_t v = avist->palette[i];
819 avio_wb32(pb, v<<8);
820 }
821 ff_end_tag(pb, pc_tag);
822 memcpy(avist->old_palette, avist->palette, pal_size * 4);
823 }
824 }
825 }
826 if (reshuffle_ret) {
827 ret = avi_write_packet_internal(s, pkt);
828
829fail:
830 if (reshuffle_ret)
831 av_packet_free(&pkt);
832 return ret;
833 }
834 }
835
836 return avi_write_packet_internal(s, pkt);
837}
838
839static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
840{
841 unsigned char tag[5];
842 unsigned int flags = 0;
843 const int stream_index = pkt->stream_index;
844 int size = pkt->size;
845 AVIContext *avi = s->priv_data;
846 AVIOContext *pb = s->pb;
847 AVIStream *avist = s->streams[stream_index]->priv_data;
848 AVCodecParameters *par = s->streams[stream_index]->codecpar;
849
850 if (pkt->dts != AV_NOPTS_VALUE)
851 avist->last_dts = pkt->dts + pkt->duration;
852
853 avist->packet_count++;
854
855 // Make sure to put an OpenDML chunk when the file size exceeds the limits
856 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
857 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
858 avi_write_ix(s);
859 ff_end_tag(pb, avi->movi_list);
860
861 if (avi->riff_id == 1)
862 avi_write_idx1(s);
863
864 ff_end_tag(pb, avi->riff_start);
865 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
866 }
867
868 avi_stream2fourcc(tag, stream_index, par->codec_type);
869 if (pkt->flags & AV_PKT_FLAG_KEY)
870 flags = 0x10;
871 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
872 avist->audio_strm_length += size;
873
874 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
875 int ret;
876 ret = avi_add_ientry(s, stream_index, NULL, flags, size);
877 if (ret < 0)
878 return ret;
879 }
880
881 avio_write(pb, tag, 4);
882 avio_wl32(pb, size);
883 avio_write(pb, pkt->data, size);
884 if (size & 1)
885 avio_w8(pb, 0);
886
887 return 0;
888}
889
890static int avi_write_trailer(AVFormatContext *s)
891{
892 AVIContext *avi = s->priv_data;
893 AVIOContext *pb = s->pb;
894 int res = 0;
895 int i, j, n, nb_frames;
896 int64_t file_size;
897
898 for (i = 0; i < s->nb_streams; i++) {
899 AVIStream *avist = s->streams[i]->priv_data;
900 write_skip_frames(s, i, avist->last_dts);
901 }
902
903 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
904 if (avi->riff_id == 1) {
905 ff_end_tag(pb, avi->movi_list);
906 res = avi_write_idx1(s);
907 ff_end_tag(pb, avi->riff_start);
908 } else {
909 avi_write_ix(s);
910 ff_end_tag(pb, avi->movi_list);
911 ff_end_tag(pb, avi->riff_start);
912
913 file_size = avio_tell(pb);
914 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
915 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
916 avio_skip(pb, 16);
917
918 for (n = nb_frames = 0; n < s->nb_streams; n++) {
919 AVCodecParameters *par = s->streams[n]->codecpar;
920 AVIStream *avist = s->streams[n]->priv_data;
921
922 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
923 if (nb_frames < avist->packet_count)
924 nb_frames = avist->packet_count;
925 } else {
926 if (par->codec_id == AV_CODEC_ID_MP2 ||
927 par->codec_id == AV_CODEC_ID_MP3)
928 nb_frames += avist->packet_count;
929 }
930 }
931 avio_wl32(pb, nb_frames);
932 avio_seek(pb, file_size, SEEK_SET);
933
934 avi_write_counters(s, avi->riff_id);
935 }
936 }
937
938 if (avi->riff_id >= avi->master_index_max_size) {
939 int index_space = AVI_MASTER_INDEX_PREFIX_SIZE +
940 AVI_MASTER_INDEX_ENTRY_SIZE * avi->riff_id;
941 av_log(s, AV_LOG_WARNING, "Output file not strictly OpenDML compliant, "
942 "consider re-muxing with 'reserve_index_space' option value >= %d\n",
943 index_space);
944 }
945
946 for (i = 0; i < s->nb_streams; i++) {
947 AVIStream *avist = s->streams[i]->priv_data;
948 for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
949 av_freep(&avist->indexes.cluster[j]);
950 av_freep(&avist->indexes.cluster);
951 avist->indexes.ents_allocated = avist->indexes.entry = 0;
952 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
953 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
954 avio_wl32(pb, avist->max_size);
955 }
956 }
957
958 return res;
959}
960
961#define OFFSET(x) offsetof(AVIContext, x)
962#define ENC AV_OPT_FLAG_ENCODING_PARAM
963static const AVOption options[] = {
964 { "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 },
965 { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
966 { NULL },
967};
968
969static const AVClass avi_muxer_class = {
970 .class_name = "AVI muxer",
971 .item_name = av_default_item_name,
972 .option = options,
973 .version = LIBAVUTIL_VERSION_INT,
974};
975
976AVOutputFormat ff_avi_muxer = {
977 .name = "avi",
978 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
979 .mime_type = "video/x-msvideo",
980 .extensions = "avi",
981 .priv_data_size = sizeof(AVIContext),
982 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
983 .video_codec = AV_CODEC_ID_MPEG4,
984 .init = avi_init,
985 .write_header = avi_write_header,
986 .write_packet = avi_write_packet,
987 .write_trailer = avi_write_trailer,
988 .codec_tag = (const AVCodecTag * const []) {
989 ff_codec_bmp_tags, ff_codec_wav_tags, 0
990 },
991 .priv_class = &avi_muxer_class,
992};
993
generated by cgit at 2024-05-17 02:30:57 (GMT)