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 #include <math.h>
23
24 #include "avformat.h"
25 #include "internal.h"
26 #include "avi.h"
27 #include "avio_internal.h"
28 #include "riff.h"
29 #include "mpegts.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"
40
41 /*
42 * TODO:
43 * - fill all fields if non streamed (nb_frames for example)
44 */
45
46 typedef struct AVIIentry {
47 char tag[4];
48 unsigned int flags;
49 unsigned int pos;
50 unsigned int len;
51 } AVIIentry;
52
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 */
57
58 typedef struct AVIIndex {
59 int64_t indx_start;
60 int64_t audio_strm_offset;
61 int entry;
62 int ents_allocated;
63 int master_odml_riff_id_base;
64 AVIIentry** cluster;
65 } AVIIndex;
66
67 typedef struct AVIContext {
68 const AVClass *class;
69 AVPacket *empty_packet;
70 int64_t riff_start, movi_list, odml_list;
71 int64_t frames_hdr_all;
72 int riff_id;
73 int reserve_index_space;
74 int master_index_max_size;
75 int write_channel_mask;
76 int flipped_raw_rgb;
77 } AVIContext;
78
79 typedef struct AVIStream {
80 int64_t frames_hdr_strm;
81 int64_t audio_strm_length;
82 int packet_count;
83 int entry;
84 int max_size;
85 int sample_requested;
86
87 int64_t last_dts;
88
89 AVIIndex indexes;
90
91 int64_t strh_flags_offset;
92
93 uint32_t palette[AVPALETTE_COUNT];
94 uint32_t old_palette[AVPALETTE_COUNT];
95 int64_t pal_offset;
96 } AVIStream;
97
98 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt);
99
avi_get_ientry(const AVIIndex * idx,int ent_id)100 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
101 {
102 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
103 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
104 return &idx->cluster[cl][id];
105 }
106
avi_add_ientry(AVFormatContext * s,int stream_index,char * tag,unsigned int flags,unsigned int size)107 static int avi_add_ientry(AVFormatContext *s, int stream_index, char *tag,
108 unsigned int flags, unsigned int size)
109 {
110 AVIContext *avi = s->priv_data;
111 AVIOContext *pb = s->pb;
112 AVIStream *avist = s->streams[stream_index]->priv_data;
113 AVIIndex *idx = &avist->indexes;
114 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
115 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
116
117 if (idx->ents_allocated <= idx->entry) {
118 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
119 if (!idx->cluster) {
120 idx->ents_allocated = 0;
121 idx->entry = 0;
122 return AVERROR(ENOMEM);
123 }
124 idx->cluster[cl] =
125 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
126 if (!idx->cluster[cl])
127 return AVERROR(ENOMEM);
128 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
129 }
130
131 if (tag)
132 memcpy(idx->cluster[cl][id].tag, tag, 4);
133 else
134 memset(idx->cluster[cl][id].tag, 0, 4);
135 idx->cluster[cl][id].flags = flags;
136 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
137 idx->cluster[cl][id].len = size;
138 avist->max_size = FFMAX(avist->max_size, size);
139 idx->entry++;
140
141 return 0;
142 }
143
avi_init(struct AVFormatContext * s)144 static av_cold int avi_init(struct AVFormatContext *s)
145 {
146 AVIContext *avi = s->priv_data;
147
148 if (avi->reserve_index_space > 0) {
149 avi->master_index_max_size = (avi->reserve_index_space - AVI_MASTER_INDEX_PREFIX_SIZE) / AVI_MASTER_INDEX_ENTRY_SIZE;
150 avi->master_index_max_size = FFMAX(avi->master_index_max_size, 16);
151 } else
152 avi->master_index_max_size = AVI_MASTER_INDEX_SIZE_DEFAULT;
153 av_log(s, AV_LOG_DEBUG, "reserve_index_space:%d master_index_max_size:%d\n",
154 avi->reserve_index_space, avi->master_index_max_size);
155
156 return 1; /* stream initialization continues in avi_write_header */
157 }
158
avi_start_new_riff(AVFormatContext * s,AVIOContext * pb,const char * riff_tag,const char * list_tag)159 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
160 const char *riff_tag, const char *list_tag)
161 {
162 AVIContext *avi = s->priv_data;
163 int64_t loff;
164 int i;
165
166 avi->riff_id++;
167 for (i = 0; i < s->nb_streams; i++) {
168 AVIStream *avist = s->streams[i]->priv_data;
169 avist->indexes.audio_strm_offset = avist->audio_strm_length;
170 avist->indexes.entry = 0;
171 }
172
173 avi->riff_start = ff_start_tag(pb, "RIFF");
174 ffio_wfourcc(pb, riff_tag);
175 loff = ff_start_tag(pb, "LIST");
176 ffio_wfourcc(pb, list_tag);
177 return loff;
178 }
179
avi_stream2fourcc(char * tag,int index,enum AVMediaType type)180 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
181 {
182 tag[0] = '0' + index / 10;
183 tag[1] = '0' + index % 10;
184 if (type == AVMEDIA_TYPE_VIDEO) {
185 tag[2] = 'd';
186 tag[3] = 'c';
187 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
188 // note: this is not an official code
189 tag[2] = 's';
190 tag[3] = 'b';
191 } else {
192 tag[2] = 'w';
193 tag[3] = 'b';
194 }
195 tag[4] = '\0';
196 return tag;
197 }
198
avi_write_counters(AVFormatContext * s,int riff_id)199 static int avi_write_counters(AVFormatContext *s, int riff_id)
200 {
201 AVIOContext *pb = s->pb;
202 AVIContext *avi = s->priv_data;
203 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
204 int64_t file_size;
205 AVCodecParameters *par;
206
207 file_size = avio_tell(pb);
208 for (n = 0; n < s->nb_streams; n++) {
209 AVIStream *avist = s->streams[n]->priv_data;
210
211 av_assert0(avist->frames_hdr_strm);
212 par = s->streams[n]->codecpar;
213 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
214 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
215 if (au_ssize == 0)
216 avio_wl32(pb, avist->packet_count);
217 else
218 avio_wl32(pb, avist->audio_strm_length / au_ssize);
219 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
220 nb_frames = FFMAX(nb_frames, avist->packet_count);
221 }
222 if (riff_id == 1) {
223 av_assert0(avi->frames_hdr_all);
224 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
225 avio_wl32(pb, nb_frames);
226 }
227 avio_seek(pb, file_size, SEEK_SET);
228
229 return 0;
230 }
231
write_odml_master(AVFormatContext * s,int stream_index)232 static void write_odml_master(AVFormatContext *s, int stream_index)
233 {
234 AVIOContext *pb = s->pb;
235 AVIContext *avi = s->priv_data;
236 AVStream *st = s->streams[stream_index];
237 AVCodecParameters *par = st->codecpar;
238 AVIStream *avist = st->priv_data;
239 unsigned char tag[5];
240 int j;
241
242 /* Starting to lay out AVI OpenDML master index.
243 * We want to make it JUNK entry for now, since we'd
244 * like to get away without making AVI an OpenDML one
245 * for compatibility reasons. */
246 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
247 avio_wl16(pb, 4); /* wLongsPerEntry */
248 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
249 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
250 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
251 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, par->codec_type));
252 /* dwChunkId */
253 avio_wl64(pb, 0); /* dwReserved[3] */
254 avio_wl32(pb, 0); /* Must be 0. */
255 for (j = 0; j < avi->master_index_max_size * 2; j++)
256 avio_wl64(pb, 0);
257 ff_end_tag(pb, avist->indexes.indx_start);
258 }
259
avi_write_header(AVFormatContext * s)260 static int avi_write_header(AVFormatContext *s)
261 {
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;
270 int padding;
271
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);
276 }
277
278 avi->empty_packet = av_packet_alloc();
279 if (!avi->empty_packet)
280 return AVERROR(ENOMEM);
281
282 for (n = 0; n < s->nb_streams; n++) {
283 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
284 if (!s->streams[n]->priv_data)
285 return AVERROR(ENOMEM);
286 }
287
288 /* header list */
289 avi->riff_id = 0;
290 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
291
292 /* avi header */
293 ffio_wfourcc(pb, "avih");
294 avio_wl32(pb, 14 * 4);
295 bitrate = 0;
296
297 video_par = NULL;
298 for (n = 0; n < s->nb_streams; n++) {
299 AVCodecParameters *par = s->streams[n]->codecpar;
300 AVStream *st = s->streams[n];
301 bitrate = FFMIN(bitrate + par->bit_rate, INT32_MAX);
302 if (st->duration > 0) {
303 int64_t stream_duration = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q);
304 max_stream_duration = FFMAX(stream_duration, max_stream_duration);
305 }
306 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
307 video_par = par;
308 video_st = st;
309 }
310 }
311
312 /* guess master index size based on bitrate and duration */
313 if (!avi->reserve_index_space) {
314 double duration_est, filesize_est;
315 if (s->duration > 0)
316 duration_est = (double)s->duration / AV_TIME_BASE;
317 else if (max_stream_duration > 0)
318 duration_est = (double)max_stream_duration / AV_TIME_BASE;
319 else
320 duration_est = 10 * 60 * 60; /* default to 10 hours */
321 filesize_est = duration_est * (bitrate / 8) * 1.10; /* add 10% safety margin for muxer+bitrate */
322 avi->master_index_max_size = FFMAX((int)ceil(filesize_est / AVI_MAX_RIFF_SIZE) + 1,
323 avi->master_index_max_size);
324 av_log(s, AV_LOG_DEBUG, "duration_est:%0.3f, filesize_est:%0.1fGiB, master_index_max_size:%d\n",
325 duration_est, filesize_est / (1024*1024*1024), avi->master_index_max_size);
326 }
327
328 nb_frames = 0;
329
330 // TODO: should be avg_frame_rate
331 if (video_st)
332 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
333 video_st->time_base.den));
334 else
335 avio_wl32(pb, 0);
336 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
337 avio_wl32(pb, 0); /* padding */
338 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
339 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
340 else
341 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
342 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
343 avio_wl32(pb, nb_frames); /* nb frames, filled later */
344 avio_wl32(pb, 0); /* initial frame */
345 avio_wl32(pb, s->nb_streams); /* nb streams */
346 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
347 if (video_par) {
348 avio_wl32(pb, video_par->width);
349 avio_wl32(pb, video_par->height);
350 } else {
351 avio_wl32(pb, 0);
352 avio_wl32(pb, 0);
353 }
354 avio_wl32(pb, 0); /* reserved */
355 avio_wl32(pb, 0); /* reserved */
356 avio_wl32(pb, 0); /* reserved */
357 avio_wl32(pb, 0); /* reserved */
358
359 /* stream list */
360 for (i = 0; i < n; i++) {
361 AVStream *st = s->streams[i];
362 AVCodecParameters *par = st->codecpar;
363 AVIStream *avist = st->priv_data;
364 list2 = ff_start_tag(pb, "LIST");
365 ffio_wfourcc(pb, "strl");
366
367 /* stream generic header */
368 strh = ff_start_tag(pb, "strh");
369 switch (par->codec_type) {
370 case AVMEDIA_TYPE_SUBTITLE:
371 // XSUB subtitles behave like video tracks, other subtitles
372 // are not (yet) supported.
373 if (par->codec_id != AV_CODEC_ID_XSUB) {
374 avpriv_report_missing_feature(s, "Subtitle streams other than DivX XSUB");
375 return AVERROR_PATCHWELCOME;
376 }
377 case AVMEDIA_TYPE_VIDEO:
378 ffio_wfourcc(pb, "vids");
379 break;
380 case AVMEDIA_TYPE_AUDIO:
381 ffio_wfourcc(pb, "auds");
382 break;
383 // case AVMEDIA_TYPE_TEXT:
384 // ffio_wfourcc(pb, "txts");
385 // break;
386 case AVMEDIA_TYPE_DATA:
387 ffio_wfourcc(pb, "dats");
388 break;
389 }
390 if (par->codec_type == AVMEDIA_TYPE_VIDEO ||
391 par->codec_id == AV_CODEC_ID_XSUB)
392 avio_wl32(pb, par->codec_tag);
393 else
394 avio_wl32(pb, 1);
395 avist->strh_flags_offset = avio_tell(pb);
396 avio_wl32(pb, 0); /* flags */
397 avio_wl16(pb, 0); /* priority */
398 avio_wl16(pb, 0); /* language */
399 avio_wl32(pb, 0); /* initial frame */
400
401 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
402
403 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
404 && par->codec_id != AV_CODEC_ID_XSUB
405 && au_byterate > 1000LL*au_scale) {
406 au_byterate = 600;
407 au_scale = 1;
408 }
409 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
410 if (par->codec_id == AV_CODEC_ID_XSUB)
411 au_scale = au_byterate = 0;
412
413 avio_wl32(pb, au_scale); /* scale */
414 avio_wl32(pb, au_byterate); /* rate */
415
416 avio_wl32(pb, 0); /* start */
417 /* remember this offset to fill later */
418 avist->frames_hdr_strm = avio_tell(pb);
419 if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
420 /* FIXME: this may be broken, but who cares */
421 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
422 else
423 avio_wl32(pb, 0); /* length, XXX: filled later */
424
425 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
426 if (par->codec_type == AVMEDIA_TYPE_VIDEO)
427 avio_wl32(pb, 1024 * 1024);
428 else if (par->codec_type == AVMEDIA_TYPE_AUDIO)
429 avio_wl32(pb, 12 * 1024);
430 else
431 avio_wl32(pb, 0);
432 avio_wl32(pb, -1); /* quality */
433 avio_wl32(pb, au_ssize); /* sample size */
434 avio_wl32(pb, 0);
435 avio_wl16(pb, par->width);
436 avio_wl16(pb, par->height);
437 ff_end_tag(pb, strh);
438
439 if (par->codec_type != AVMEDIA_TYPE_DATA) {
440 int ret, flags;
441 enum AVPixelFormat pix_fmt;
442
443 strf = ff_start_tag(pb, "strf");
444 switch (par->codec_type) {
445 case AVMEDIA_TYPE_SUBTITLE:
446 /* XSUB subtitles behave like video tracks, other subtitles
447 * are not (yet) supported. */
448 if (par->codec_id != AV_CODEC_ID_XSUB)
449 break;
450 case AVMEDIA_TYPE_VIDEO:
451 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
452 if ( !par->codec_tag
453 && par->codec_id == AV_CODEC_ID_RAWVIDEO
454 && par->format == AV_PIX_FMT_RGB555LE
455 && par->bits_per_coded_sample == 15)
456 par->bits_per_coded_sample = 16;
457 avist->pal_offset = avio_tell(pb) + 40;
458 ff_put_bmp_header(pb, par, 0, 0, avi->flipped_raw_rgb);
459 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
460 par->bits_per_coded_sample);
461 if ( !par->codec_tag
462 && par->codec_id == AV_CODEC_ID_RAWVIDEO
463 && par->format != pix_fmt
464 && par->format != AV_PIX_FMT_NONE)
465 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
466 av_get_pix_fmt_name(par->format));
467
468 if (par->format == AV_PIX_FMT_PAL8) {
469 if (par->bits_per_coded_sample < 0 || par->bits_per_coded_sample > 8) {
470 av_log(s, AV_LOG_ERROR, "PAL8 with %d bps is not allowed\n", par->bits_per_coded_sample);
471 return AVERROR(EINVAL);
472 }
473 }
474
475 break;
476 case AVMEDIA_TYPE_AUDIO:
477 flags = (avi->write_channel_mask == 0) ? FF_PUT_WAV_HEADER_SKIP_CHANNELMASK : 0;
478 if ((ret = ff_put_wav_header(s, pb, par, flags)) < 0)
479 return ret;
480 break;
481 default:
482 av_log(s, AV_LOG_ERROR,
483 "Invalid or not supported codec type '%s' found in the input\n",
484 (char *)av_x_if_null(av_get_media_type_string(par->codec_type), "?"));
485 return AVERROR(EINVAL);
486 }
487 ff_end_tag(pb, strf);
488 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
489 ff_riff_write_info_tag(s->pb, "strn", t->value);
490 t = NULL;
491 }
492 if (par->codec_id == AV_CODEC_ID_XSUB
493 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
494 const char* langstr = ff_convert_lang_to(t->value, AV_LANG_ISO639_1);
495 t = NULL;
496 if (langstr) {
497 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
498 if (!str)
499 return AVERROR(ENOMEM);
500 ff_riff_write_info_tag(s->pb, "strn", str);
501 av_free(str);
502 }
503 }
504 }
505
506 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
507 write_odml_master(s, i);
508 }
509
510 if (par->codec_type == AVMEDIA_TYPE_VIDEO &&
511 st->sample_aspect_ratio.num > 0 &&
512 st->sample_aspect_ratio.den > 0) {
513 int vprp = ff_start_tag(pb, "vprp");
514 AVRational dar = av_mul_q(st->sample_aspect_ratio,
515 (AVRational) { par->width,
516 par->height });
517 int num, den, fields, i;
518 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
519 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_BB ||
520 par->field_order == AV_FIELD_TB || par->field_order == AV_FIELD_BT) {
521 fields = 2; // interlaced
522 } else {
523 fields = 1; // progressive
524 }
525
526 avio_wl32(pb, 0); // video format = unknown
527 avio_wl32(pb, 0); // video standard = unknown
528 // TODO: should be avg_frame_rate
529 avio_wl32(pb, (2LL*st->time_base.den + st->time_base.num - 1) / (2LL * st->time_base.num));
530 avio_wl32(pb, par->width);
531 avio_wl32(pb, par->height);
532 avio_wl16(pb, den);
533 avio_wl16(pb, num);
534 avio_wl32(pb, par->width);
535 avio_wl32(pb, par->height);
536 avio_wl32(pb, fields); // fields per frame
537
538 for (i = 0; i < fields; i++) {
539 int start_line;
540 // OpenDML v1.02 is not very specific on what value to use for
541 // start_line when frame data is not coming from a capturing device,
542 // so just use 0/1 depending on the field order for interlaced frames
543 if (par->field_order == AV_FIELD_TT || par->field_order == AV_FIELD_TB) {
544 start_line = (i == 0) ? 0 : 1;
545 } else if (par->field_order == AV_FIELD_BB || par->field_order == AV_FIELD_BT) {
546 start_line = (i == 0) ? 1 : 0;
547 } else {
548 start_line = 0;
549 }
550
551 avio_wl32(pb, par->height / fields); // compressed bitmap height
552 avio_wl32(pb, par->width); // compressed bitmap width
553 avio_wl32(pb, par->height / fields); // valid bitmap height
554 avio_wl32(pb, par->width); // valid bitmap width
555 avio_wl32(pb, 0); // valid bitmap X offset
556 avio_wl32(pb, 0); // valid bitmap Y offset
557 avio_wl32(pb, 0); // valid X offset in T
558 avio_wl32(pb, start_line); // valid Y start line
559 }
560 ff_end_tag(pb, vprp);
561 }
562
563 ff_end_tag(pb, list2);
564 }
565
566 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
567 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
568 avi->odml_list = ff_start_tag(pb, "JUNK");
569 ffio_wfourcc(pb, "odml");
570 ffio_wfourcc(pb, "dmlh");
571 avio_wl32(pb, 248);
572 for (i = 0; i < 248; i += 4)
573 avio_wl32(pb, 0);
574 ff_end_tag(pb, avi->odml_list);
575 }
576
577 ff_end_tag(pb, list1);
578
579 ff_riff_write_info(s);
580
581
582 padding = s->metadata_header_padding;
583 if (padding < 0)
584 padding = 1016;
585
586 /* some padding for easier tag editing */
587 if (padding) {
588 list2 = ff_start_tag(pb, "JUNK");
589 for (i = padding; i > 0; i -= 4)
590 avio_wl32(pb, 0);
591 ff_end_tag(pb, list2);
592 }
593
594 avi->movi_list = ff_start_tag(pb, "LIST");
595 ffio_wfourcc(pb, "movi");
596
597 return 0;
598 }
599
update_odml_entry(AVFormatContext * s,int stream_index,int64_t ix,int size)600 static void update_odml_entry(AVFormatContext *s, int stream_index, int64_t ix, int size)
601 {
602 AVIOContext *pb = s->pb;
603 AVIContext *avi = s->priv_data;
604 AVIStream *avist = s->streams[stream_index]->priv_data;
605 int64_t pos;
606 int au_byterate, au_ssize, au_scale;
607
608 pos = avio_tell(pb);
609
610 /* Updating one entry in the AVI OpenDML master index */
611 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
612 ffio_wfourcc(pb, "indx"); /* enabling this entry */
613 avio_skip(pb, 8);
614 avio_wl32(pb, avi->riff_id - avist->indexes.master_odml_riff_id_base); /* nEntriesInUse */
615 avio_skip(pb, 16 * (avi->riff_id - avist->indexes.master_odml_riff_id_base));
616 avio_wl64(pb, ix); /* qwOffset */
617 avio_wl32(pb, size); /* dwSize */
618 ff_parse_specific_params(s->streams[stream_index], &au_byterate, &au_ssize, &au_scale);
619 if (s->streams[stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
620 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
621 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
622 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
623 avist->sample_requested = 1;
624 }
625 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
626 } else
627 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
628
629 avio_seek(pb, pos, SEEK_SET);
630 }
631
avi_write_ix(AVFormatContext * s)632 static int avi_write_ix(AVFormatContext *s)
633 {
634 AVIOContext *pb = s->pb;
635 AVIContext *avi = s->priv_data;
636 char tag[5];
637 char ix_tag[] = "ix00";
638 int i, j;
639
640 av_assert0(pb->seekable & AVIO_SEEKABLE_NORMAL);
641
642 for (i = 0; i < s->nb_streams; i++) {
643 AVIStream *avist = s->streams[i]->priv_data;
644 if (avi->riff_id - avist->indexes.master_odml_riff_id_base == avi->master_index_max_size) {
645 int64_t pos;
646 int size = AVI_MASTER_INDEX_PREFIX_SIZE + AVI_MASTER_INDEX_ENTRY_SIZE * avi->master_index_max_size;
647
648 pos = avio_tell(pb);
649 update_odml_entry(s, i, pos, size);
650 write_odml_master(s, i);
651 av_assert1(avio_tell(pb) - pos == size);
652 avist->indexes.master_odml_riff_id_base = avi->riff_id - 1;
653 }
654 av_assert0(avi->riff_id - avist->indexes.master_odml_riff_id_base < avi->master_index_max_size);
655 }
656
657 for (i = 0; i < s->nb_streams; i++) {
658 AVIStream *avist = s->streams[i]->priv_data;
659 int64_t ix;
660
661 avi_stream2fourcc(tag, i, s->streams[i]->codecpar->codec_type);
662 ix_tag[3] = '0' + i;
663
664 /* Writing AVI OpenDML leaf index chunk */
665 ix = avio_tell(pb);
666 ffio_wfourcc(pb, ix_tag); /* ix?? */
667 avio_wl32(pb, avist->indexes.entry * 8 + 24);
668 /* chunk size */
669 avio_wl16(pb, 2); /* wLongsPerEntry */
670 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
671 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
672 avio_wl32(pb, avist->indexes.entry);
673 /* nEntriesInUse */
674 ffio_wfourcc(pb, tag); /* dwChunkId */
675 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
676 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
677
678 for (j = 0; j < avist->indexes.entry; j++) {
679 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
680 avio_wl32(pb, ie->pos + 8);
681 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
682 (ie->flags & 0x10 ? 0 : 0x80000000));
683 }
684
685 update_odml_entry(s, i, ix, avio_tell(pb) - ix);
686 }
687 return 0;
688 }
689
avi_write_idx1(AVFormatContext * s)690 static int avi_write_idx1(AVFormatContext *s)
691 {
692 AVIOContext *pb = s->pb;
693 AVIContext *avi = s->priv_data;
694 int64_t idx_chunk;
695 int i;
696 char tag[5];
697
698 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
699 AVIStream *avist;
700 AVIIentry *ie = 0, *tie;
701 int empty, stream_id = -1;
702
703 idx_chunk = ff_start_tag(pb, "idx1");
704 for (i = 0; i < s->nb_streams; i++) {
705 avist = s->streams[i]->priv_data;
706 avist->entry = 0;
707 }
708
709 do {
710 empty = 1;
711 for (i = 0; i < s->nb_streams; i++) {
712 avist = s->streams[i]->priv_data;
713 if (avist->indexes.entry <= avist->entry)
714 continue;
715
716 tie = avi_get_ientry(&avist->indexes, avist->entry);
717 if (empty || tie->pos < ie->pos) {
718 ie = tie;
719 stream_id = i;
720 }
721 empty = 0;
722 }
723 if (!empty) {
724 avist = s->streams[stream_id]->priv_data;
725 if (*ie->tag)
726 ffio_wfourcc(pb, ie->tag);
727 else {
728 avi_stream2fourcc(tag, stream_id,
729 s->streams[stream_id]->codecpar->codec_type);
730 ffio_wfourcc(pb, tag);
731 }
732 avio_wl32(pb, ie->flags);
733 avio_wl32(pb, ie->pos);
734 avio_wl32(pb, ie->len);
735 avist->entry++;
736 }
737 } while (!empty);
738 ff_end_tag(pb, idx_chunk);
739
740 avi_write_counters(s, avi->riff_id);
741 }
742 return 0;
743 }
744
write_skip_frames(AVFormatContext * s,int stream_index,int64_t dts)745 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
746 {
747 AVIContext *avi = s->priv_data;
748 AVIStream *avist = s->streams[stream_index]->priv_data;
749 AVCodecParameters *par = s->streams[stream_index]->codecpar;
750
751 ff_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
752 while (par->block_align == 0 && dts != AV_NOPTS_VALUE &&
753 dts > avist->packet_count && par->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
754
755 if (dts - avist->packet_count > 60000) {
756 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
757 return AVERROR(EINVAL);
758 }
759
760 avi->empty_packet->stream_index = stream_index;
761 avi_write_packet_internal(s, avi->empty_packet);
762 ff_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
763 }
764
765 return 0;
766 }
767
avi_write_packet(AVFormatContext * s,AVPacket * pkt)768 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
769 {
770 const int stream_index = pkt->stream_index;
771 AVCodecParameters *par = s->streams[stream_index]->codecpar;
772 int ret;
773
774 if (par->codec_id == AV_CODEC_ID_H264 && par->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
775 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
776 if (ret < 0)
777 return ret;
778 }
779
780 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
781 return ret;
782
783 if (!pkt->size)
784 return avi_write_packet_internal(s, pkt); /* Passthrough */
785
786 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
787 AVIStream *avist = s->streams[stream_index]->priv_data;
788 AVIOContext *pb = s->pb;
789 AVPacket *opkt = pkt;
790 int reshuffle_ret;
791 if (par->codec_id == AV_CODEC_ID_RAWVIDEO && par->codec_tag == 0) {
792 int64_t bpc = par->bits_per_coded_sample != 15 ? par->bits_per_coded_sample : 16;
793 int expected_stride = ((par->width * bpc + 31) >> 5)*4;
794 reshuffle_ret = ff_reshuffle_raw_rgb(s, &pkt, par, expected_stride);
795 if (reshuffle_ret < 0)
796 return reshuffle_ret;
797 } else
798 reshuffle_ret = 0;
799 if (par->format == AV_PIX_FMT_PAL8) {
800 ret = ff_get_packet_palette(s, opkt, reshuffle_ret, avist->palette);
801 if (ret < 0)
802 goto fail;
803 if (ret) {
804 int pal_size = 1 << par->bits_per_coded_sample;
805 int pc_tag, i;
806
807 av_assert0(par->bits_per_coded_sample >= 0 && par->bits_per_coded_sample <= 8);
808
809 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && avist->pal_offset) {
810 int64_t cur_offset = avio_tell(pb);
811 avio_seek(pb, avist->pal_offset, SEEK_SET);
812 for (i = 0; i < pal_size; i++) {
813 uint32_t v = avist->palette[i];
814 avio_wl32(pb, v & 0xffffff);
815 }
816 avio_seek(pb, cur_offset, SEEK_SET);
817 memcpy(avist->old_palette, avist->palette, pal_size * 4);
818 avist->pal_offset = 0;
819 }
820 if (memcmp(avist->palette, avist->old_palette, pal_size * 4)) {
821 unsigned char tag[5];
822 avi_stream2fourcc(tag, stream_index, par->codec_type);
823 tag[2] = 'p'; tag[3] = 'c';
824 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
825 if (avist->strh_flags_offset) {
826 int64_t cur_offset = avio_tell(pb);
827 avio_seek(pb, avist->strh_flags_offset, SEEK_SET);
828 avio_wl32(pb, AVISF_VIDEO_PALCHANGES);
829 avio_seek(pb, cur_offset, SEEK_SET);
830 avist->strh_flags_offset = 0;
831 }
832 ret = avi_add_ientry(s, stream_index, tag, AVIIF_NO_TIME,
833 pal_size * 4 + 4);
834 if (ret < 0)
835 goto fail;
836 }
837 pc_tag = ff_start_tag(pb, tag);
838 avio_w8(pb, 0);
839 avio_w8(pb, pal_size & 0xFF);
840 avio_wl16(pb, 0); // reserved
841 for (i = 0; i < pal_size; i++) {
842 uint32_t v = avist->palette[i];
843 avio_wb32(pb, v<<8);
844 }
845 ff_end_tag(pb, pc_tag);
846 memcpy(avist->old_palette, avist->palette, pal_size * 4);
847 }
848 }
849 }
850 if (reshuffle_ret) {
851 ret = avi_write_packet_internal(s, pkt);
852
853 fail:
854 if (reshuffle_ret)
855 av_packet_free(&pkt);
856 return ret;
857 }
858 }
859
860 return avi_write_packet_internal(s, pkt);
861 }
862
avi_write_packet_internal(AVFormatContext * s,AVPacket * pkt)863 static int avi_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
864 {
865 unsigned char tag[5];
866 unsigned int flags = 0;
867 const int stream_index = pkt->stream_index;
868 int size = pkt->size;
869 AVIContext *avi = s->priv_data;
870 AVIOContext *pb = s->pb;
871 AVIStream *avist = s->streams[stream_index]->priv_data;
872 AVCodecParameters *par = s->streams[stream_index]->codecpar;
873
874 if (pkt->dts != AV_NOPTS_VALUE)
875 avist->last_dts = pkt->dts + pkt->duration;
876
877 avist->packet_count++;
878
879 // Make sure to put an OpenDML chunk when the file size exceeds the limits
880 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) &&
881 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
882 avi_write_ix(s);
883 ff_end_tag(pb, avi->movi_list);
884
885 if (avi->riff_id == 1)
886 avi_write_idx1(s);
887
888 ff_end_tag(pb, avi->riff_start);
889 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
890 }
891
892 avi_stream2fourcc(tag, stream_index, par->codec_type);
893 if (pkt->flags & AV_PKT_FLAG_KEY)
894 flags = 0x10;
895 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
896 avist->audio_strm_length += size;
897
898 if (s->pb->seekable & AVIO_SEEKABLE_NORMAL) {
899 int ret;
900 ret = avi_add_ientry(s, stream_index, NULL, flags, size);
901 if (ret < 0)
902 return ret;
903 }
904
905 avio_write(pb, tag, 4);
906 avio_wl32(pb, size);
907 avio_write(pb, pkt->data, size);
908 if (size & 1)
909 avio_w8(pb, 0);
910
911 return 0;
912 }
913
avi_write_trailer(AVFormatContext * s)914 static int avi_write_trailer(AVFormatContext *s)
915 {
916 AVIContext *avi = s->priv_data;
917 AVIOContext *pb = s->pb;
918 int res = 0;
919 int i, n, nb_frames;
920 int64_t file_size;
921
922 for (i = 0; i < s->nb_streams; i++) {
923 AVIStream *avist = s->streams[i]->priv_data;
924 write_skip_frames(s, i, avist->last_dts);
925 }
926
927 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
928 if (avi->riff_id == 1) {
929 ff_end_tag(pb, avi->movi_list);
930 res = avi_write_idx1(s);
931 ff_end_tag(pb, avi->riff_start);
932 } else {
933 avi_write_ix(s);
934 ff_end_tag(pb, avi->movi_list);
935 ff_end_tag(pb, avi->riff_start);
936
937 file_size = avio_tell(pb);
938 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
939 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
940 avio_skip(pb, 16);
941
942 for (n = nb_frames = 0; n < s->nb_streams; n++) {
943 AVCodecParameters *par = s->streams[n]->codecpar;
944 AVIStream *avist = s->streams[n]->priv_data;
945
946 if (par->codec_type == AVMEDIA_TYPE_VIDEO) {
947 if (nb_frames < avist->packet_count)
948 nb_frames = avist->packet_count;
949 } else {
950 if (par->codec_id == AV_CODEC_ID_MP2 ||
951 par->codec_id == AV_CODEC_ID_MP3)
952 nb_frames += avist->packet_count;
953 }
954 }
955 avio_wl32(pb, nb_frames);
956 avio_seek(pb, file_size, SEEK_SET);
957
958 avi_write_counters(s, avi->riff_id);
959 }
960 }
961
962 if (avi->riff_id >= avi->master_index_max_size) {
963 int index_space = AVI_MASTER_INDEX_PREFIX_SIZE +
964 AVI_MASTER_INDEX_ENTRY_SIZE * avi->riff_id;
965 av_log(s, AV_LOG_WARNING, "Output file not strictly OpenDML compliant, "
966 "consider re-muxing with 'reserve_index_space' option value >= %d\n",
967 index_space);
968 }
969
970 for (i = 0; i < s->nb_streams; i++) {
971 AVIStream *avist = s->streams[i]->priv_data;
972 if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
973 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
974 avio_wl32(pb, avist->max_size);
975 }
976 }
977
978 return res;
979 }
980
avi_deinit(AVFormatContext * s)981 static void avi_deinit(AVFormatContext *s)
982 {
983 AVIContext *avi = s->priv_data;
984
985 av_packet_free(&avi->empty_packet);
986
987 for (int i = 0; i < s->nb_streams; i++) {
988 AVIStream *avist = s->streams[i]->priv_data;
989 if (!avist)
990 continue;
991 for (int j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
992 av_freep(&avist->indexes.cluster[j]);
993 av_freep(&avist->indexes.cluster);
994 avist->indexes.ents_allocated = avist->indexes.entry = 0;
995 }
996 }
997
998 #define OFFSET(x) offsetof(AVIContext, x)
999 #define ENC AV_OPT_FLAG_ENCODING_PARAM
1000 static const AVOption options[] = {
1001 { "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 },
1002 { "write_channel_mask", "write channel mask into wave format header", OFFSET(write_channel_mask), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, ENC },
1003 { "flipped_raw_rgb", "Raw RGB bitmaps are stored bottom-up", OFFSET(flipped_raw_rgb), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
1004 { NULL },
1005 };
1006
1007 static const AVClass avi_muxer_class = {
1008 .class_name = "AVI muxer",
1009 .item_name = av_default_item_name,
1010 .option = options,
1011 .version = LIBAVUTIL_VERSION_INT,
1012 };
1013
1014 AVOutputFormat ff_avi_muxer = {
1015 .name = "avi",
1016 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
1017 .mime_type = "video/x-msvideo",
1018 .extensions = "avi",
1019 .priv_data_size = sizeof(AVIContext),
1020 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
1021 .video_codec = AV_CODEC_ID_MPEG4,
1022 .init = avi_init,
1023 .deinit = avi_deinit,
1024 .write_header = avi_write_header,
1025 .write_packet = avi_write_packet,
1026 .write_trailer = avi_write_trailer,
1027 .codec_tag = ff_riff_codec_tags_list,
1028 .priv_class = &avi_muxer_class,
1029 };
1030