Commit | Line | Data |
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2ba45a60 DM |
1 | /* |
2 | * various utility functions for use within FFmpeg | |
3 | * Copyright (c) 2000, 2001, 2002 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 | #undef NDEBUG | |
23 | #include <assert.h> | |
24 | #include <stdarg.h> | |
25 | #include <stdint.h> | |
26 | ||
27 | #include "config.h" | |
28 | ||
29 | #include "libavutil/avassert.h" | |
30 | #include "libavutil/avstring.h" | |
31 | #include "libavutil/dict.h" | |
32 | #include "libavutil/internal.h" | |
33 | #include "libavutil/mathematics.h" | |
34 | #include "libavutil/opt.h" | |
35 | #include "libavutil/parseutils.h" | |
36 | #include "libavutil/pixdesc.h" | |
37 | #include "libavutil/time.h" | |
38 | #include "libavutil/timestamp.h" | |
39 | ||
40 | #include "libavcodec/bytestream.h" | |
41 | #include "libavcodec/internal.h" | |
42 | #include "libavcodec/raw.h" | |
43 | ||
44 | #include "audiointerleave.h" | |
45 | #include "avformat.h" | |
46 | #include "avio_internal.h" | |
47 | #include "id3v2.h" | |
48 | #include "internal.h" | |
49 | #include "metadata.h" | |
50 | #if CONFIG_NETWORK | |
51 | #include "network.h" | |
52 | #endif | |
53 | #include "riff.h" | |
54 | #include "url.h" | |
55 | ||
092a9121 DM |
56 | #include "libavutil/ffversion.h" |
57 | const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION; | |
58 | ||
2ba45a60 DM |
59 | /** |
60 | * @file | |
61 | * various utility functions for use within FFmpeg | |
62 | */ | |
63 | ||
64 | unsigned avformat_version(void) | |
65 | { | |
66 | av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100); | |
67 | return LIBAVFORMAT_VERSION_INT; | |
68 | } | |
69 | ||
70 | const char *avformat_configuration(void) | |
71 | { | |
72 | return FFMPEG_CONFIGURATION; | |
73 | } | |
74 | ||
75 | const char *avformat_license(void) | |
76 | { | |
77 | #define LICENSE_PREFIX "libavformat license: " | |
78 | return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; | |
79 | } | |
80 | ||
81 | #define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48)) | |
82 | ||
83 | static int is_relative(int64_t ts) { | |
84 | return ts > (RELATIVE_TS_BASE - (1LL<<48)); | |
85 | } | |
86 | ||
87 | /** | |
88 | * Wrap a given time stamp, if there is an indication for an overflow | |
89 | * | |
90 | * @param st stream | |
91 | * @param timestamp the time stamp to wrap | |
92 | * @return resulting time stamp | |
93 | */ | |
94 | static int64_t wrap_timestamp(AVStream *st, int64_t timestamp) | |
95 | { | |
96 | if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE && | |
97 | st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) { | |
98 | if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET && | |
99 | timestamp < st->pts_wrap_reference) | |
100 | return timestamp + (1ULL << st->pts_wrap_bits); | |
101 | else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET && | |
102 | timestamp >= st->pts_wrap_reference) | |
103 | return timestamp - (1ULL << st->pts_wrap_bits); | |
104 | } | |
105 | return timestamp; | |
106 | } | |
107 | ||
108 | MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate) | |
f6fa7814 | 109 | MAKE_ACCESSORS(AVStream, stream, char *, recommended_encoder_configuration) |
2ba45a60 DM |
110 | MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec) |
111 | MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec) | |
112 | MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec) | |
113 | MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding) | |
114 | MAKE_ACCESSORS(AVFormatContext, format, void *, opaque) | |
115 | MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb) | |
116 | ||
117 | int64_t av_stream_get_end_pts(const AVStream *st) | |
118 | { | |
119 | return st->pts.val; | |
120 | } | |
121 | ||
122 | struct AVCodecParserContext *av_stream_get_parser(const AVStream *st) | |
123 | { | |
124 | return st->parser; | |
125 | } | |
126 | ||
127 | void av_format_inject_global_side_data(AVFormatContext *s) | |
128 | { | |
129 | int i; | |
130 | s->internal->inject_global_side_data = 1; | |
131 | for (i = 0; i < s->nb_streams; i++) { | |
132 | AVStream *st = s->streams[i]; | |
133 | st->inject_global_side_data = 1; | |
134 | } | |
135 | } | |
136 | ||
f6fa7814 DM |
137 | int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src) |
138 | { | |
139 | av_assert0(!dst->codec_whitelist && !dst->format_whitelist); | |
140 | dst-> codec_whitelist = av_strdup(src->codec_whitelist); | |
141 | dst->format_whitelist = av_strdup(src->format_whitelist); | |
142 | if ( (src-> codec_whitelist && !dst-> codec_whitelist) | |
143 | || (src->format_whitelist && !dst->format_whitelist)) { | |
144 | av_log(dst, AV_LOG_ERROR, "Failed to duplicate whitelist\n"); | |
145 | return AVERROR(ENOMEM); | |
146 | } | |
147 | return 0; | |
148 | } | |
149 | ||
2ba45a60 DM |
150 | static const AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id) |
151 | { | |
152 | if (st->codec->codec) | |
153 | return st->codec->codec; | |
154 | ||
155 | switch (st->codec->codec_type) { | |
156 | case AVMEDIA_TYPE_VIDEO: | |
157 | if (s->video_codec) return s->video_codec; | |
158 | break; | |
159 | case AVMEDIA_TYPE_AUDIO: | |
160 | if (s->audio_codec) return s->audio_codec; | |
161 | break; | |
162 | case AVMEDIA_TYPE_SUBTITLE: | |
163 | if (s->subtitle_codec) return s->subtitle_codec; | |
164 | break; | |
165 | } | |
166 | ||
167 | return avcodec_find_decoder(codec_id); | |
168 | } | |
169 | ||
170 | int av_format_get_probe_score(const AVFormatContext *s) | |
171 | { | |
172 | return s->probe_score; | |
173 | } | |
174 | ||
175 | /* an arbitrarily chosen "sane" max packet size -- 50M */ | |
176 | #define SANE_CHUNK_SIZE (50000000) | |
177 | ||
178 | int ffio_limit(AVIOContext *s, int size) | |
179 | { | |
180 | if (s->maxsize>= 0) { | |
181 | int64_t remaining= s->maxsize - avio_tell(s); | |
182 | if (remaining < size) { | |
183 | int64_t newsize = avio_size(s); | |
184 | if (!s->maxsize || s->maxsize<newsize) | |
185 | s->maxsize = newsize - !newsize; | |
186 | remaining= s->maxsize - avio_tell(s); | |
187 | remaining= FFMAX(remaining, 0); | |
188 | } | |
189 | ||
190 | if (s->maxsize>= 0 && remaining+1 < size) { | |
191 | av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1); | |
192 | size = remaining+1; | |
193 | } | |
194 | } | |
195 | return size; | |
196 | } | |
197 | ||
198 | /* Read the data in sane-sized chunks and append to pkt. | |
199 | * Return the number of bytes read or an error. */ | |
200 | static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size) | |
201 | { | |
202 | int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos | |
203 | int orig_size = pkt->size; | |
204 | int ret; | |
205 | ||
206 | do { | |
207 | int prev_size = pkt->size; | |
208 | int read_size; | |
209 | ||
210 | /* When the caller requests a lot of data, limit it to the amount | |
211 | * left in file or SANE_CHUNK_SIZE when it is not known. */ | |
212 | read_size = size; | |
213 | if (read_size > SANE_CHUNK_SIZE/10) { | |
214 | read_size = ffio_limit(s, read_size); | |
215 | // If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE | |
216 | if (s->maxsize < 0) | |
217 | read_size = FFMIN(read_size, SANE_CHUNK_SIZE); | |
218 | } | |
219 | ||
220 | ret = av_grow_packet(pkt, read_size); | |
221 | if (ret < 0) | |
222 | break; | |
223 | ||
224 | ret = avio_read(s, pkt->data + prev_size, read_size); | |
225 | if (ret != read_size) { | |
226 | av_shrink_packet(pkt, prev_size + FFMAX(ret, 0)); | |
227 | break; | |
228 | } | |
229 | ||
230 | size -= read_size; | |
231 | } while (size > 0); | |
232 | if (size > 0) | |
233 | pkt->flags |= AV_PKT_FLAG_CORRUPT; | |
234 | ||
235 | pkt->pos = orig_pos; | |
236 | if (!pkt->size) | |
237 | av_free_packet(pkt); | |
238 | return pkt->size > orig_size ? pkt->size - orig_size : ret; | |
239 | } | |
240 | ||
241 | int av_get_packet(AVIOContext *s, AVPacket *pkt, int size) | |
242 | { | |
243 | av_init_packet(pkt); | |
244 | pkt->data = NULL; | |
245 | pkt->size = 0; | |
246 | pkt->pos = avio_tell(s); | |
247 | ||
248 | return append_packet_chunked(s, pkt, size); | |
249 | } | |
250 | ||
251 | int av_append_packet(AVIOContext *s, AVPacket *pkt, int size) | |
252 | { | |
253 | if (!pkt->size) | |
254 | return av_get_packet(s, pkt, size); | |
255 | return append_packet_chunked(s, pkt, size); | |
256 | } | |
257 | ||
258 | int av_filename_number_test(const char *filename) | |
259 | { | |
260 | char buf[1024]; | |
261 | return filename && | |
262 | (av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0); | |
263 | } | |
264 | ||
265 | static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, | |
266 | AVProbeData *pd) | |
267 | { | |
268 | static const struct { | |
269 | const char *name; | |
270 | enum AVCodecID id; | |
271 | enum AVMediaType type; | |
272 | } fmt_id_type[] = { | |
273 | { "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO }, | |
274 | { "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO }, | |
275 | { "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO }, | |
276 | { "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO }, | |
277 | { "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO }, | |
278 | { "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO }, | |
279 | { "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO }, | |
280 | { "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO }, | |
281 | { "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO }, | |
282 | { "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO }, | |
283 | { 0 } | |
284 | }; | |
285 | int score; | |
286 | AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score); | |
287 | ||
288 | if (fmt && st->request_probe <= score) { | |
289 | int i; | |
290 | av_log(s, AV_LOG_DEBUG, | |
291 | "Probe with size=%d, packets=%d detected %s with score=%d\n", | |
292 | pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, | |
293 | fmt->name, score); | |
294 | for (i = 0; fmt_id_type[i].name; i++) { | |
295 | if (!strcmp(fmt->name, fmt_id_type[i].name)) { | |
296 | st->codec->codec_id = fmt_id_type[i].id; | |
297 | st->codec->codec_type = fmt_id_type[i].type; | |
298 | return score; | |
299 | } | |
300 | } | |
301 | } | |
302 | return 0; | |
303 | } | |
304 | ||
305 | /************************************************************/ | |
306 | /* input media file */ | |
307 | ||
308 | int av_demuxer_open(AVFormatContext *ic) { | |
309 | int err; | |
310 | ||
f6fa7814 DM |
311 | if (ic->format_whitelist && av_match_list(ic->iformat->name, ic->format_whitelist, ',') <= 0) { |
312 | av_log(ic, AV_LOG_ERROR, "Format not on whitelist\n"); | |
313 | return AVERROR(EINVAL); | |
314 | } | |
315 | ||
2ba45a60 DM |
316 | if (ic->iformat->read_header) { |
317 | err = ic->iformat->read_header(ic); | |
318 | if (err < 0) | |
319 | return err; | |
320 | } | |
321 | ||
322 | if (ic->pb && !ic->data_offset) | |
323 | ic->data_offset = avio_tell(ic->pb); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | /* Open input file and probe the format if necessary. */ | |
329 | static int init_input(AVFormatContext *s, const char *filename, | |
330 | AVDictionary **options) | |
331 | { | |
332 | int ret; | |
333 | AVProbeData pd = { filename, NULL, 0 }; | |
334 | int score = AVPROBE_SCORE_RETRY; | |
335 | ||
336 | if (s->pb) { | |
337 | s->flags |= AVFMT_FLAG_CUSTOM_IO; | |
338 | if (!s->iformat) | |
339 | return av_probe_input_buffer2(s->pb, &s->iformat, filename, | |
340 | s, 0, s->format_probesize); | |
341 | else if (s->iformat->flags & AVFMT_NOFILE) | |
342 | av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and " | |
343 | "will be ignored with AVFMT_NOFILE format.\n"); | |
344 | return 0; | |
345 | } | |
346 | ||
347 | if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) || | |
348 | (!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score)))) | |
349 | return score; | |
350 | ||
351 | if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags, | |
352 | &s->interrupt_callback, options)) < 0) | |
353 | return ret; | |
354 | if (s->iformat) | |
355 | return 0; | |
356 | return av_probe_input_buffer2(s->pb, &s->iformat, filename, | |
357 | s, 0, s->format_probesize); | |
358 | } | |
359 | ||
360 | static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt, | |
361 | AVPacketList **plast_pktl) | |
362 | { | |
363 | AVPacketList *pktl = av_mallocz(sizeof(AVPacketList)); | |
364 | if (!pktl) | |
365 | return NULL; | |
366 | ||
367 | if (*packet_buffer) | |
368 | (*plast_pktl)->next = pktl; | |
369 | else | |
370 | *packet_buffer = pktl; | |
371 | ||
372 | /* Add the packet in the buffered packet list. */ | |
373 | *plast_pktl = pktl; | |
374 | pktl->pkt = *pkt; | |
375 | return &pktl->pkt; | |
376 | } | |
377 | ||
378 | int avformat_queue_attached_pictures(AVFormatContext *s) | |
379 | { | |
380 | int i; | |
381 | for (i = 0; i < s->nb_streams; i++) | |
382 | if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC && | |
383 | s->streams[i]->discard < AVDISCARD_ALL) { | |
384 | AVPacket copy = s->streams[i]->attached_pic; | |
385 | if (copy.size <= 0) { | |
386 | av_log(s, AV_LOG_WARNING, | |
387 | "Attached picture on stream %d has invalid size, " | |
388 | "ignoring\n", i); | |
389 | continue; | |
390 | } | |
391 | copy.buf = av_buffer_ref(copy.buf); | |
392 | if (!copy.buf) | |
393 | return AVERROR(ENOMEM); | |
394 | ||
395 | add_to_pktbuf(&s->raw_packet_buffer, ©, | |
396 | &s->raw_packet_buffer_end); | |
397 | } | |
398 | return 0; | |
399 | } | |
400 | ||
401 | int avformat_open_input(AVFormatContext **ps, const char *filename, | |
402 | AVInputFormat *fmt, AVDictionary **options) | |
403 | { | |
404 | AVFormatContext *s = *ps; | |
405 | int ret = 0; | |
406 | AVDictionary *tmp = NULL; | |
407 | ID3v2ExtraMeta *id3v2_extra_meta = NULL; | |
408 | ||
409 | if (!s && !(s = avformat_alloc_context())) | |
410 | return AVERROR(ENOMEM); | |
411 | if (!s->av_class) { | |
412 | av_log(NULL, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n"); | |
413 | return AVERROR(EINVAL); | |
414 | } | |
415 | if (fmt) | |
416 | s->iformat = fmt; | |
417 | ||
418 | if (options) | |
419 | av_dict_copy(&tmp, *options, 0); | |
420 | ||
421 | if ((ret = av_opt_set_dict(s, &tmp)) < 0) | |
422 | goto fail; | |
423 | ||
424 | if ((ret = init_input(s, filename, &tmp)) < 0) | |
425 | goto fail; | |
426 | s->probe_score = ret; | |
f6fa7814 DM |
427 | |
428 | if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) { | |
429 | av_log(s, AV_LOG_ERROR, "Format not on whitelist\n"); | |
430 | ret = AVERROR(EINVAL); | |
431 | goto fail; | |
432 | } | |
433 | ||
2ba45a60 DM |
434 | avio_skip(s->pb, s->skip_initial_bytes); |
435 | ||
436 | /* Check filename in case an image number is expected. */ | |
437 | if (s->iformat->flags & AVFMT_NEEDNUMBER) { | |
438 | if (!av_filename_number_test(filename)) { | |
439 | ret = AVERROR(EINVAL); | |
440 | goto fail; | |
441 | } | |
442 | } | |
443 | ||
444 | s->duration = s->start_time = AV_NOPTS_VALUE; | |
445 | av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename)); | |
446 | ||
447 | /* Allocate private data. */ | |
448 | if (s->iformat->priv_data_size > 0) { | |
449 | if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) { | |
450 | ret = AVERROR(ENOMEM); | |
451 | goto fail; | |
452 | } | |
453 | if (s->iformat->priv_class) { | |
454 | *(const AVClass **) s->priv_data = s->iformat->priv_class; | |
455 | av_opt_set_defaults(s->priv_data); | |
456 | if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) | |
457 | goto fail; | |
458 | } | |
459 | } | |
460 | ||
461 | /* e.g. AVFMT_NOFILE formats will not have a AVIOContext */ | |
462 | if (s->pb) | |
463 | ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, 0); | |
464 | ||
465 | if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header) | |
466 | if ((ret = s->iformat->read_header(s)) < 0) | |
467 | goto fail; | |
468 | ||
469 | if (id3v2_extra_meta) { | |
470 | if (!strcmp(s->iformat->name, "mp3") || !strcmp(s->iformat->name, "aac") || | |
471 | !strcmp(s->iformat->name, "tta")) { | |
472 | if ((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) | |
473 | goto fail; | |
474 | } else | |
475 | av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n"); | |
476 | } | |
477 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); | |
478 | ||
479 | if ((ret = avformat_queue_attached_pictures(s)) < 0) | |
480 | goto fail; | |
481 | ||
482 | if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset) | |
483 | s->data_offset = avio_tell(s->pb); | |
484 | ||
485 | s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; | |
486 | ||
487 | if (options) { | |
488 | av_dict_free(options); | |
489 | *options = tmp; | |
490 | } | |
491 | *ps = s; | |
492 | return 0; | |
493 | ||
494 | fail: | |
495 | ff_id3v2_free_extra_meta(&id3v2_extra_meta); | |
496 | av_dict_free(&tmp); | |
497 | if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO)) | |
498 | avio_close(s->pb); | |
499 | avformat_free_context(s); | |
500 | *ps = NULL; | |
501 | return ret; | |
502 | } | |
503 | ||
504 | /*******************************************************/ | |
505 | ||
506 | static void force_codec_ids(AVFormatContext *s, AVStream *st) | |
507 | { | |
508 | switch (st->codec->codec_type) { | |
509 | case AVMEDIA_TYPE_VIDEO: | |
510 | if (s->video_codec_id) | |
511 | st->codec->codec_id = s->video_codec_id; | |
512 | break; | |
513 | case AVMEDIA_TYPE_AUDIO: | |
514 | if (s->audio_codec_id) | |
515 | st->codec->codec_id = s->audio_codec_id; | |
516 | break; | |
517 | case AVMEDIA_TYPE_SUBTITLE: | |
518 | if (s->subtitle_codec_id) | |
519 | st->codec->codec_id = s->subtitle_codec_id; | |
520 | break; | |
521 | } | |
522 | } | |
523 | ||
524 | static int probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt) | |
525 | { | |
526 | if (st->request_probe>0) { | |
527 | AVProbeData *pd = &st->probe_data; | |
528 | int end; | |
529 | av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets); | |
530 | --st->probe_packets; | |
531 | ||
532 | if (pkt) { | |
533 | uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); | |
534 | if (!new_buf) { | |
535 | av_log(s, AV_LOG_WARNING, | |
536 | "Failed to reallocate probe buffer for stream %d\n", | |
537 | st->index); | |
538 | goto no_packet; | |
539 | } | |
540 | pd->buf = new_buf; | |
541 | memcpy(pd->buf + pd->buf_size, pkt->data, pkt->size); | |
542 | pd->buf_size += pkt->size; | |
543 | memset(pd->buf + pd->buf_size, 0, AVPROBE_PADDING_SIZE); | |
544 | } else { | |
545 | no_packet: | |
546 | st->probe_packets = 0; | |
547 | if (!pd->buf_size) { | |
548 | av_log(s, AV_LOG_WARNING, | |
549 | "nothing to probe for stream %d\n", st->index); | |
550 | } | |
551 | } | |
552 | ||
553 | end= s->raw_packet_buffer_remaining_size <= 0 | |
554 | || st->probe_packets<= 0; | |
555 | ||
556 | if (end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)) { | |
557 | int score = set_codec_from_probe_data(s, st, pd); | |
558 | if ( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_STREAM_RETRY) | |
559 | || end) { | |
560 | pd->buf_size = 0; | |
561 | av_freep(&pd->buf); | |
562 | st->request_probe = -1; | |
563 | if (st->codec->codec_id != AV_CODEC_ID_NONE) { | |
564 | av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index); | |
565 | } else | |
566 | av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index); | |
567 | } | |
568 | force_codec_ids(s, st); | |
569 | } | |
570 | } | |
571 | return 0; | |
572 | } | |
573 | ||
574 | static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt) | |
575 | { | |
576 | int64_t ref = pkt->dts; | |
577 | int i, pts_wrap_behavior; | |
578 | int64_t pts_wrap_reference; | |
579 | AVProgram *first_program; | |
580 | ||
581 | if (ref == AV_NOPTS_VALUE) | |
582 | ref = pkt->pts; | |
583 | if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow) | |
584 | return 0; | |
585 | ref &= (1LL << st->pts_wrap_bits)-1; | |
586 | ||
587 | // reference time stamp should be 60 s before first time stamp | |
588 | pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num); | |
589 | // if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset | |
590 | pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) || | |
591 | (ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ? | |
592 | AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET; | |
593 | ||
594 | first_program = av_find_program_from_stream(s, NULL, stream_index); | |
595 | ||
596 | if (!first_program) { | |
597 | int default_stream_index = av_find_default_stream_index(s); | |
598 | if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) { | |
599 | for (i = 0; i < s->nb_streams; i++) { | |
dcebb6f3 DM |
600 | if (av_find_program_from_stream(s, NULL, i)) |
601 | continue; | |
2ba45a60 DM |
602 | s->streams[i]->pts_wrap_reference = pts_wrap_reference; |
603 | s->streams[i]->pts_wrap_behavior = pts_wrap_behavior; | |
604 | } | |
605 | } | |
606 | else { | |
607 | st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference; | |
608 | st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior; | |
609 | } | |
610 | } | |
611 | else { | |
612 | AVProgram *program = first_program; | |
613 | while (program) { | |
614 | if (program->pts_wrap_reference != AV_NOPTS_VALUE) { | |
615 | pts_wrap_reference = program->pts_wrap_reference; | |
616 | pts_wrap_behavior = program->pts_wrap_behavior; | |
617 | break; | |
618 | } | |
619 | program = av_find_program_from_stream(s, program, stream_index); | |
620 | } | |
621 | ||
622 | // update every program with differing pts_wrap_reference | |
623 | program = first_program; | |
624 | while (program) { | |
625 | if (program->pts_wrap_reference != pts_wrap_reference) { | |
626 | for (i = 0; i<program->nb_stream_indexes; i++) { | |
627 | s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference; | |
628 | s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior; | |
629 | } | |
630 | ||
631 | program->pts_wrap_reference = pts_wrap_reference; | |
632 | program->pts_wrap_behavior = pts_wrap_behavior; | |
633 | } | |
634 | program = av_find_program_from_stream(s, program, stream_index); | |
635 | } | |
636 | } | |
637 | return 1; | |
638 | } | |
639 | ||
640 | int ff_read_packet(AVFormatContext *s, AVPacket *pkt) | |
641 | { | |
642 | int ret, i, err; | |
643 | AVStream *st; | |
644 | ||
645 | for (;;) { | |
646 | AVPacketList *pktl = s->raw_packet_buffer; | |
647 | ||
648 | if (pktl) { | |
649 | *pkt = pktl->pkt; | |
650 | st = s->streams[pkt->stream_index]; | |
651 | if (s->raw_packet_buffer_remaining_size <= 0) | |
652 | if ((err = probe_codec(s, st, NULL)) < 0) | |
653 | return err; | |
654 | if (st->request_probe <= 0) { | |
655 | s->raw_packet_buffer = pktl->next; | |
656 | s->raw_packet_buffer_remaining_size += pkt->size; | |
657 | av_free(pktl); | |
658 | return 0; | |
659 | } | |
660 | } | |
661 | ||
662 | pkt->data = NULL; | |
663 | pkt->size = 0; | |
664 | av_init_packet(pkt); | |
665 | ret = s->iformat->read_packet(s, pkt); | |
666 | if (ret < 0) { | |
667 | if (!pktl || ret == AVERROR(EAGAIN)) | |
668 | return ret; | |
669 | for (i = 0; i < s->nb_streams; i++) { | |
670 | st = s->streams[i]; | |
671 | if (st->probe_packets) | |
672 | if ((err = probe_codec(s, st, NULL)) < 0) | |
673 | return err; | |
674 | av_assert0(st->request_probe <= 0); | |
675 | } | |
676 | continue; | |
677 | } | |
678 | ||
679 | if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) && | |
680 | (pkt->flags & AV_PKT_FLAG_CORRUPT)) { | |
681 | av_log(s, AV_LOG_WARNING, | |
682 | "Dropped corrupted packet (stream = %d)\n", | |
683 | pkt->stream_index); | |
684 | av_free_packet(pkt); | |
685 | continue; | |
686 | } | |
687 | ||
688 | if (pkt->stream_index >= (unsigned)s->nb_streams) { | |
689 | av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index); | |
690 | continue; | |
691 | } | |
692 | ||
693 | st = s->streams[pkt->stream_index]; | |
694 | ||
695 | if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) { | |
696 | // correct first time stamps to negative values | |
697 | if (!is_relative(st->first_dts)) | |
698 | st->first_dts = wrap_timestamp(st, st->first_dts); | |
699 | if (!is_relative(st->start_time)) | |
700 | st->start_time = wrap_timestamp(st, st->start_time); | |
701 | if (!is_relative(st->cur_dts)) | |
702 | st->cur_dts = wrap_timestamp(st, st->cur_dts); | |
703 | } | |
704 | ||
705 | pkt->dts = wrap_timestamp(st, pkt->dts); | |
706 | pkt->pts = wrap_timestamp(st, pkt->pts); | |
707 | ||
708 | force_codec_ids(s, st); | |
709 | ||
710 | /* TODO: audio: time filter; video: frame reordering (pts != dts) */ | |
711 | if (s->use_wallclock_as_timestamps) | |
712 | pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base); | |
713 | ||
714 | if (!pktl && st->request_probe <= 0) | |
715 | return ret; | |
716 | ||
717 | add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); | |
718 | s->raw_packet_buffer_remaining_size -= pkt->size; | |
719 | ||
720 | if ((err = probe_codec(s, st, pkt)) < 0) | |
721 | return err; | |
722 | } | |
723 | } | |
724 | ||
2ba45a60 DM |
725 | |
726 | /**********************************************************/ | |
727 | ||
728 | static int determinable_frame_size(AVCodecContext *avctx) | |
729 | { | |
730 | if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/ | |
731 | avctx->codec_id == AV_CODEC_ID_MP1 || | |
732 | avctx->codec_id == AV_CODEC_ID_MP2 || | |
733 | avctx->codec_id == AV_CODEC_ID_MP3/* || | |
734 | avctx->codec_id == AV_CODEC_ID_CELT*/) | |
735 | return 1; | |
736 | return 0; | |
737 | } | |
738 | ||
739 | /** | |
740 | * Return the frame duration in seconds. Return 0 if not available. | |
741 | */ | |
f6fa7814 | 742 | void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st, |
2ba45a60 DM |
743 | AVCodecParserContext *pc, AVPacket *pkt) |
744 | { | |
f6fa7814 DM |
745 | AVRational codec_framerate = s->iformat ? st->codec->framerate : |
746 | av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame}); | |
2ba45a60 DM |
747 | int frame_size; |
748 | ||
749 | *pnum = 0; | |
750 | *pden = 0; | |
751 | switch (st->codec->codec_type) { | |
752 | case AVMEDIA_TYPE_VIDEO: | |
753 | if (st->r_frame_rate.num && !pc) { | |
754 | *pnum = st->r_frame_rate.den; | |
755 | *pden = st->r_frame_rate.num; | |
756 | } else if (st->time_base.num * 1000LL > st->time_base.den) { | |
757 | *pnum = st->time_base.num; | |
758 | *pden = st->time_base.den; | |
f6fa7814 DM |
759 | } else if (codec_framerate.den * 1000LL > codec_framerate.num) { |
760 | av_assert0(st->codec->ticks_per_frame); | |
761 | av_reduce(pnum, pden, | |
762 | codec_framerate.den, | |
763 | codec_framerate.num * (int64_t)st->codec->ticks_per_frame, | |
764 | INT_MAX); | |
765 | ||
2ba45a60 | 766 | if (pc && pc->repeat_pict) { |
f6fa7814 DM |
767 | av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case |
768 | av_reduce(pnum, pden, | |
769 | (*pnum) * (1LL + pc->repeat_pict), | |
770 | (*pden), | |
771 | INT_MAX); | |
2ba45a60 DM |
772 | } |
773 | /* If this codec can be interlaced or progressive then we need | |
774 | * a parser to compute duration of a packet. Thus if we have | |
775 | * no parser in such case leave duration undefined. */ | |
776 | if (st->codec->ticks_per_frame > 1 && !pc) | |
777 | *pnum = *pden = 0; | |
778 | } | |
779 | break; | |
780 | case AVMEDIA_TYPE_AUDIO: | |
781 | frame_size = av_get_audio_frame_duration(st->codec, pkt->size); | |
782 | if (frame_size <= 0 || st->codec->sample_rate <= 0) | |
783 | break; | |
784 | *pnum = frame_size; | |
785 | *pden = st->codec->sample_rate; | |
786 | break; | |
787 | default: | |
788 | break; | |
789 | } | |
790 | } | |
791 | ||
792 | static int is_intra_only(AVCodecContext *enc) { | |
793 | const AVCodecDescriptor *desc; | |
794 | ||
795 | if (enc->codec_type != AVMEDIA_TYPE_VIDEO) | |
796 | return 1; | |
797 | ||
798 | desc = av_codec_get_codec_descriptor(enc); | |
799 | if (!desc) { | |
800 | desc = avcodec_descriptor_get(enc->codec_id); | |
801 | av_codec_set_codec_descriptor(enc, desc); | |
802 | } | |
803 | if (desc) | |
804 | return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY); | |
805 | return 0; | |
806 | } | |
807 | ||
808 | static int has_decode_delay_been_guessed(AVStream *st) | |
809 | { | |
810 | if (st->codec->codec_id != AV_CODEC_ID_H264) return 1; | |
811 | if (!st->info) // if we have left find_stream_info then nb_decoded_frames won't increase anymore for stream copy | |
812 | return 1; | |
813 | #if CONFIG_H264_DECODER | |
814 | if (st->codec->has_b_frames && | |
815 | avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames) | |
816 | return 1; | |
817 | #endif | |
818 | if (st->codec->has_b_frames<3) | |
819 | return st->nb_decoded_frames >= 7; | |
820 | else if (st->codec->has_b_frames<4) | |
821 | return st->nb_decoded_frames >= 18; | |
822 | else | |
823 | return st->nb_decoded_frames >= 20; | |
824 | } | |
825 | ||
826 | static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl) | |
827 | { | |
828 | if (pktl->next) | |
829 | return pktl->next; | |
830 | if (pktl == s->packet_buffer_end) | |
831 | return s->parse_queue; | |
832 | return NULL; | |
833 | } | |
834 | ||
835 | static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) { | |
836 | int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 && | |
837 | st->codec->codec_id != AV_CODEC_ID_HEVC; | |
838 | ||
839 | if(!onein_oneout) { | |
840 | int delay = st->codec->has_b_frames; | |
841 | int i; | |
842 | ||
843 | if (dts == AV_NOPTS_VALUE) { | |
844 | int64_t best_score = INT64_MAX; | |
845 | for (i = 0; i<delay; i++) { | |
846 | if (st->pts_reorder_error_count[i]) { | |
847 | int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i]; | |
848 | if (score < best_score) { | |
849 | best_score = score; | |
850 | dts = pts_buffer[i]; | |
851 | } | |
852 | } | |
853 | } | |
854 | } else { | |
855 | for (i = 0; i<delay; i++) { | |
856 | if (pts_buffer[i] != AV_NOPTS_VALUE) { | |
857 | int64_t diff = FFABS(pts_buffer[i] - dts) | |
858 | + (uint64_t)st->pts_reorder_error[i]; | |
859 | diff = FFMAX(diff, st->pts_reorder_error[i]); | |
860 | st->pts_reorder_error[i] = diff; | |
861 | st->pts_reorder_error_count[i]++; | |
862 | if (st->pts_reorder_error_count[i] > 250) { | |
863 | st->pts_reorder_error[i] >>= 1; | |
864 | st->pts_reorder_error_count[i] >>= 1; | |
865 | } | |
866 | } | |
867 | } | |
868 | } | |
869 | } | |
870 | ||
871 | if (dts == AV_NOPTS_VALUE) | |
872 | dts = pts_buffer[0]; | |
873 | ||
874 | return dts; | |
875 | } | |
876 | ||
877 | static void update_initial_timestamps(AVFormatContext *s, int stream_index, | |
878 | int64_t dts, int64_t pts, AVPacket *pkt) | |
879 | { | |
880 | AVStream *st = s->streams[stream_index]; | |
881 | AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; | |
882 | int64_t pts_buffer[MAX_REORDER_DELAY+1]; | |
883 | int64_t shift; | |
884 | int i, delay; | |
885 | ||
886 | if (st->first_dts != AV_NOPTS_VALUE || | |
887 | dts == AV_NOPTS_VALUE || | |
888 | st->cur_dts == AV_NOPTS_VALUE || | |
889 | is_relative(dts)) | |
890 | return; | |
891 | ||
892 | delay = st->codec->has_b_frames; | |
893 | st->first_dts = dts - (st->cur_dts - RELATIVE_TS_BASE); | |
894 | st->cur_dts = dts; | |
895 | shift = st->first_dts - RELATIVE_TS_BASE; | |
896 | ||
897 | for (i = 0; i<MAX_REORDER_DELAY+1; i++) | |
898 | pts_buffer[i] = AV_NOPTS_VALUE; | |
899 | ||
900 | if (is_relative(pts)) | |
901 | pts += shift; | |
902 | ||
903 | for (; pktl; pktl = get_next_pkt(s, st, pktl)) { | |
904 | if (pktl->pkt.stream_index != stream_index) | |
905 | continue; | |
906 | if (is_relative(pktl->pkt.pts)) | |
907 | pktl->pkt.pts += shift; | |
908 | ||
909 | if (is_relative(pktl->pkt.dts)) | |
910 | pktl->pkt.dts += shift; | |
911 | ||
912 | if (st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE) | |
913 | st->start_time = pktl->pkt.pts; | |
914 | ||
915 | if (pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) { | |
916 | pts_buffer[0] = pktl->pkt.pts; | |
917 | for (i = 0; i<delay && pts_buffer[i] > pts_buffer[i + 1]; i++) | |
918 | FFSWAP(int64_t, pts_buffer[i], pts_buffer[i + 1]); | |
919 | ||
920 | pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts); | |
921 | } | |
922 | } | |
923 | ||
924 | if (st->start_time == AV_NOPTS_VALUE) | |
925 | st->start_time = pts; | |
926 | } | |
927 | ||
928 | static void update_initial_durations(AVFormatContext *s, AVStream *st, | |
929 | int stream_index, int duration) | |
930 | { | |
931 | AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; | |
932 | int64_t cur_dts = RELATIVE_TS_BASE; | |
933 | ||
934 | if (st->first_dts != AV_NOPTS_VALUE) { | |
935 | if (st->update_initial_durations_done) | |
936 | return; | |
937 | st->update_initial_durations_done = 1; | |
938 | cur_dts = st->first_dts; | |
939 | for (; pktl; pktl = get_next_pkt(s, st, pktl)) { | |
940 | if (pktl->pkt.stream_index == stream_index) { | |
941 | if (pktl->pkt.pts != pktl->pkt.dts || | |
942 | pktl->pkt.dts != AV_NOPTS_VALUE || | |
943 | pktl->pkt.duration) | |
944 | break; | |
945 | cur_dts -= duration; | |
946 | } | |
947 | } | |
948 | if (pktl && pktl->pkt.dts != st->first_dts) { | |
949 | av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s (pts %s, duration %d) in the queue\n", | |
950 | av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration); | |
951 | return; | |
952 | } | |
953 | if (!pktl) { | |
954 | av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts)); | |
955 | return; | |
956 | } | |
957 | pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; | |
958 | st->first_dts = cur_dts; | |
959 | } else if (st->cur_dts != RELATIVE_TS_BASE) | |
960 | return; | |
961 | ||
962 | for (; pktl; pktl = get_next_pkt(s, st, pktl)) { | |
963 | if (pktl->pkt.stream_index != stream_index) | |
964 | continue; | |
965 | if (pktl->pkt.pts == pktl->pkt.dts && | |
966 | (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts) && | |
967 | !pktl->pkt.duration) { | |
968 | pktl->pkt.dts = cur_dts; | |
969 | if (!st->codec->has_b_frames) | |
970 | pktl->pkt.pts = cur_dts; | |
971 | // if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) | |
972 | pktl->pkt.duration = duration; | |
973 | } else | |
974 | break; | |
975 | cur_dts = pktl->pkt.dts + pktl->pkt.duration; | |
976 | } | |
977 | if (!pktl) | |
978 | st->cur_dts = cur_dts; | |
979 | } | |
980 | ||
981 | static void compute_pkt_fields(AVFormatContext *s, AVStream *st, | |
982 | AVCodecParserContext *pc, AVPacket *pkt) | |
983 | { | |
984 | int num, den, presentation_delayed, delay, i; | |
985 | int64_t offset; | |
986 | AVRational duration; | |
987 | int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 && | |
988 | st->codec->codec_id != AV_CODEC_ID_HEVC; | |
989 | ||
990 | if (s->flags & AVFMT_FLAG_NOFILLIN) | |
991 | return; | |
992 | ||
993 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) { | |
994 | if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) { | |
995 | if (st->last_dts_for_order_check <= pkt->dts) { | |
996 | st->dts_ordered++; | |
997 | } else { | |
998 | av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING, | |
999 | "DTS %"PRIi64" < %"PRIi64" out of order\n", | |
1000 | pkt->dts, | |
1001 | st->last_dts_for_order_check); | |
1002 | st->dts_misordered++; | |
1003 | } | |
1004 | if (st->dts_ordered + st->dts_misordered > 250) { | |
1005 | st->dts_ordered >>= 1; | |
1006 | st->dts_misordered >>= 1; | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | st->last_dts_for_order_check = pkt->dts; | |
1011 | if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts) | |
1012 | pkt->dts = AV_NOPTS_VALUE; | |
1013 | } | |
1014 | ||
1015 | if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE) | |
1016 | pkt->dts = AV_NOPTS_VALUE; | |
1017 | ||
1018 | if (pc && pc->pict_type == AV_PICTURE_TYPE_B | |
1019 | && !st->codec->has_b_frames) | |
1020 | //FIXME Set low_delay = 0 when has_b_frames = 1 | |
1021 | st->codec->has_b_frames = 1; | |
1022 | ||
1023 | /* do we have a video B-frame ? */ | |
1024 | delay = st->codec->has_b_frames; | |
1025 | presentation_delayed = 0; | |
1026 | ||
1027 | /* XXX: need has_b_frame, but cannot get it if the codec is | |
1028 | * not initialized */ | |
1029 | if (delay && | |
1030 | pc && pc->pict_type != AV_PICTURE_TYPE_B) | |
1031 | presentation_delayed = 1; | |
1032 | ||
1033 | if (pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && | |
1034 | st->pts_wrap_bits < 63 && | |
1035 | pkt->dts - (1LL << (st->pts_wrap_bits - 1)) > pkt->pts) { | |
1036 | if (is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits - 1)) > st->cur_dts) { | |
1037 | pkt->dts -= 1LL << st->pts_wrap_bits; | |
1038 | } else | |
1039 | pkt->pts += 1LL << st->pts_wrap_bits; | |
1040 | } | |
1041 | ||
1042 | /* Some MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg). | |
1043 | * We take the conservative approach and discard both. | |
1044 | * Note: If this is misbehaving for an H.264 file, then possibly | |
1045 | * presentation_delayed is not set correctly. */ | |
1046 | if (delay == 1 && pkt->dts == pkt->pts && | |
1047 | pkt->dts != AV_NOPTS_VALUE && presentation_delayed) { | |
1048 | av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts); | |
1049 | if ( strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2") | |
1050 | && strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism | |
1051 | pkt->dts = AV_NOPTS_VALUE; | |
1052 | } | |
1053 | ||
1054 | duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base); | |
1055 | if (pkt->duration == 0) { | |
f6fa7814 | 1056 | ff_compute_frame_duration(s, &num, &den, st, pc, pkt); |
2ba45a60 DM |
1057 | if (den && num) { |
1058 | duration = (AVRational) {num, den}; | |
1059 | pkt->duration = av_rescale_rnd(1, | |
1060 | num * (int64_t) st->time_base.den, | |
1061 | den * (int64_t) st->time_base.num, | |
1062 | AV_ROUND_DOWN); | |
1063 | } | |
1064 | } | |
1065 | ||
1066 | if (pkt->duration != 0 && (s->packet_buffer || s->parse_queue)) | |
1067 | update_initial_durations(s, st, pkt->stream_index, pkt->duration); | |
1068 | ||
1069 | /* Correct timestamps with byte offset if demuxers only have timestamps | |
1070 | * on packet boundaries */ | |
1071 | if (pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size) { | |
1072 | /* this will estimate bitrate based on this frame's duration and size */ | |
1073 | offset = av_rescale(pc->offset, pkt->duration, pkt->size); | |
1074 | if (pkt->pts != AV_NOPTS_VALUE) | |
1075 | pkt->pts += offset; | |
1076 | if (pkt->dts != AV_NOPTS_VALUE) | |
1077 | pkt->dts += offset; | |
1078 | } | |
1079 | ||
1080 | /* This may be redundant, but it should not hurt. */ | |
1081 | if (pkt->dts != AV_NOPTS_VALUE && | |
1082 | pkt->pts != AV_NOPTS_VALUE && | |
1083 | pkt->pts > pkt->dts) | |
1084 | presentation_delayed = 1; | |
1085 | ||
1086 | av_dlog(NULL, | |
f6fa7814 | 1087 | "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d delay:%d onein_oneout:%d\n", |
2ba45a60 | 1088 | presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), |
f6fa7814 | 1089 | pkt->stream_index, pc, pkt->duration, delay, onein_oneout); |
2ba45a60 DM |
1090 | /* Interpolate PTS and DTS if they are not present. We skip H264 |
1091 | * currently because delay and has_b_frames are not reliably set. */ | |
1092 | if ((delay == 0 || (delay == 1 && pc)) && | |
1093 | onein_oneout) { | |
1094 | if (presentation_delayed) { | |
1095 | /* DTS = decompression timestamp */ | |
1096 | /* PTS = presentation timestamp */ | |
1097 | if (pkt->dts == AV_NOPTS_VALUE) | |
1098 | pkt->dts = st->last_IP_pts; | |
1099 | update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); | |
1100 | if (pkt->dts == AV_NOPTS_VALUE) | |
1101 | pkt->dts = st->cur_dts; | |
1102 | ||
1103 | /* This is tricky: the dts must be incremented by the duration | |
1104 | * of the frame we are displaying, i.e. the last I- or P-frame. */ | |
1105 | if (st->last_IP_duration == 0) | |
1106 | st->last_IP_duration = pkt->duration; | |
1107 | if (pkt->dts != AV_NOPTS_VALUE) | |
1108 | st->cur_dts = pkt->dts + st->last_IP_duration; | |
1109 | st->last_IP_duration = pkt->duration; | |
1110 | st->last_IP_pts = pkt->pts; | |
1111 | /* Cannot compute PTS if not present (we can compute it only | |
1112 | * by knowing the future. */ | |
1113 | } else if (pkt->pts != AV_NOPTS_VALUE || | |
1114 | pkt->dts != AV_NOPTS_VALUE || | |
1115 | pkt->duration ) { | |
1116 | ||
1117 | /* presentation is not delayed : PTS and DTS are the same */ | |
1118 | if (pkt->pts == AV_NOPTS_VALUE) | |
1119 | pkt->pts = pkt->dts; | |
1120 | update_initial_timestamps(s, pkt->stream_index, pkt->pts, | |
1121 | pkt->pts, pkt); | |
1122 | if (pkt->pts == AV_NOPTS_VALUE) | |
1123 | pkt->pts = st->cur_dts; | |
1124 | pkt->dts = pkt->pts; | |
1125 | if (pkt->pts != AV_NOPTS_VALUE) | |
1126 | st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1); | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | if (pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)) { | |
1131 | st->pts_buffer[0] = pkt->pts; | |
1132 | for (i = 0; i<delay && st->pts_buffer[i] > st->pts_buffer[i + 1]; i++) | |
1133 | FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i + 1]); | |
1134 | ||
1135 | pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts); | |
1136 | } | |
1137 | // We skipped it above so we try here. | |
1138 | if (!onein_oneout) | |
1139 | // This should happen on the first packet | |
1140 | update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); | |
1141 | if (pkt->dts > st->cur_dts) | |
1142 | st->cur_dts = pkt->dts; | |
1143 | ||
1144 | av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n", | |
1145 | presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts)); | |
1146 | ||
1147 | /* update flags */ | |
1148 | if (is_intra_only(st->codec)) | |
1149 | pkt->flags |= AV_PKT_FLAG_KEY; | |
1150 | if (pc) | |
1151 | pkt->convergence_duration = pc->convergence_duration; | |
1152 | } | |
1153 | ||
1154 | static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end) | |
1155 | { | |
1156 | while (*pkt_buf) { | |
1157 | AVPacketList *pktl = *pkt_buf; | |
1158 | *pkt_buf = pktl->next; | |
1159 | av_free_packet(&pktl->pkt); | |
1160 | av_freep(&pktl); | |
1161 | } | |
1162 | *pkt_buf_end = NULL; | |
1163 | } | |
1164 | ||
1165 | /** | |
1166 | * Parse a packet, add all split parts to parse_queue. | |
1167 | * | |
1168 | * @param pkt Packet to parse, NULL when flushing the parser at end of stream. | |
1169 | */ | |
1170 | static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index) | |
1171 | { | |
1172 | AVPacket out_pkt = { 0 }, flush_pkt = { 0 }; | |
1173 | AVStream *st = s->streams[stream_index]; | |
1174 | uint8_t *data = pkt ? pkt->data : NULL; | |
1175 | int size = pkt ? pkt->size : 0; | |
1176 | int ret = 0, got_output = 0; | |
1177 | ||
1178 | if (!pkt) { | |
1179 | av_init_packet(&flush_pkt); | |
1180 | pkt = &flush_pkt; | |
1181 | got_output = 1; | |
1182 | } else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) { | |
1183 | // preserve 0-size sync packets | |
1184 | compute_pkt_fields(s, st, st->parser, pkt); | |
1185 | } | |
1186 | ||
1187 | while (size > 0 || (pkt == &flush_pkt && got_output)) { | |
1188 | int len; | |
1189 | ||
1190 | av_init_packet(&out_pkt); | |
1191 | len = av_parser_parse2(st->parser, st->codec, | |
1192 | &out_pkt.data, &out_pkt.size, data, size, | |
1193 | pkt->pts, pkt->dts, pkt->pos); | |
1194 | ||
1195 | pkt->pts = pkt->dts = AV_NOPTS_VALUE; | |
1196 | pkt->pos = -1; | |
1197 | /* increment read pointer */ | |
1198 | data += len; | |
1199 | size -= len; | |
1200 | ||
1201 | got_output = !!out_pkt.size; | |
1202 | ||
1203 | if (!out_pkt.size) | |
1204 | continue; | |
1205 | ||
1206 | if (pkt->side_data) { | |
1207 | out_pkt.side_data = pkt->side_data; | |
1208 | out_pkt.side_data_elems = pkt->side_data_elems; | |
1209 | pkt->side_data = NULL; | |
1210 | pkt->side_data_elems = 0; | |
1211 | } | |
1212 | ||
1213 | /* set the duration */ | |
1214 | out_pkt.duration = 0; | |
1215 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { | |
1216 | if (st->codec->sample_rate > 0) { | |
1217 | out_pkt.duration = | |
1218 | av_rescale_q_rnd(st->parser->duration, | |
1219 | (AVRational) { 1, st->codec->sample_rate }, | |
1220 | st->time_base, | |
1221 | AV_ROUND_DOWN); | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | out_pkt.stream_index = st->index; | |
1226 | out_pkt.pts = st->parser->pts; | |
1227 | out_pkt.dts = st->parser->dts; | |
1228 | out_pkt.pos = st->parser->pos; | |
1229 | ||
1230 | if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) | |
1231 | out_pkt.pos = st->parser->frame_offset; | |
1232 | ||
1233 | if (st->parser->key_frame == 1 || | |
1234 | (st->parser->key_frame == -1 && | |
1235 | st->parser->pict_type == AV_PICTURE_TYPE_I)) | |
1236 | out_pkt.flags |= AV_PKT_FLAG_KEY; | |
1237 | ||
1238 | if (st->parser->key_frame == -1 && st->parser->pict_type ==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY)) | |
1239 | out_pkt.flags |= AV_PKT_FLAG_KEY; | |
1240 | ||
1241 | compute_pkt_fields(s, st, st->parser, &out_pkt); | |
1242 | ||
1243 | if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) { | |
1244 | out_pkt.buf = pkt->buf; | |
1245 | pkt->buf = NULL; | |
1246 | #if FF_API_DESTRUCT_PACKET | |
1247 | FF_DISABLE_DEPRECATION_WARNINGS | |
1248 | out_pkt.destruct = pkt->destruct; | |
1249 | pkt->destruct = NULL; | |
1250 | FF_ENABLE_DEPRECATION_WARNINGS | |
1251 | #endif | |
1252 | } | |
1253 | if ((ret = av_dup_packet(&out_pkt)) < 0) | |
1254 | goto fail; | |
1255 | ||
1256 | if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) { | |
1257 | av_free_packet(&out_pkt); | |
1258 | ret = AVERROR(ENOMEM); | |
1259 | goto fail; | |
1260 | } | |
1261 | } | |
1262 | ||
1263 | /* end of the stream => close and free the parser */ | |
1264 | if (pkt == &flush_pkt) { | |
1265 | av_parser_close(st->parser); | |
1266 | st->parser = NULL; | |
1267 | } | |
1268 | ||
1269 | fail: | |
1270 | av_free_packet(pkt); | |
1271 | return ret; | |
1272 | } | |
1273 | ||
1274 | static int read_from_packet_buffer(AVPacketList **pkt_buffer, | |
1275 | AVPacketList **pkt_buffer_end, | |
1276 | AVPacket *pkt) | |
1277 | { | |
1278 | AVPacketList *pktl; | |
1279 | av_assert0(*pkt_buffer); | |
1280 | pktl = *pkt_buffer; | |
1281 | *pkt = pktl->pkt; | |
1282 | *pkt_buffer = pktl->next; | |
1283 | if (!pktl->next) | |
1284 | *pkt_buffer_end = NULL; | |
1285 | av_freep(&pktl); | |
1286 | return 0; | |
1287 | } | |
1288 | ||
f6fa7814 DM |
1289 | static int64_t ts_to_samples(AVStream *st, int64_t ts) |
1290 | { | |
1291 | return av_rescale(ts, st->time_base.num * st->codec->sample_rate, st->time_base.den); | |
1292 | } | |
1293 | ||
2ba45a60 DM |
1294 | static int read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
1295 | { | |
1296 | int ret = 0, i, got_packet = 0; | |
1297 | AVDictionary *metadata = NULL; | |
1298 | ||
1299 | av_init_packet(pkt); | |
1300 | ||
1301 | while (!got_packet && !s->parse_queue) { | |
1302 | AVStream *st; | |
1303 | AVPacket cur_pkt; | |
1304 | ||
1305 | /* read next packet */ | |
1306 | ret = ff_read_packet(s, &cur_pkt); | |
1307 | if (ret < 0) { | |
1308 | if (ret == AVERROR(EAGAIN)) | |
1309 | return ret; | |
1310 | /* flush the parsers */ | |
1311 | for (i = 0; i < s->nb_streams; i++) { | |
1312 | st = s->streams[i]; | |
1313 | if (st->parser && st->need_parsing) | |
1314 | parse_packet(s, NULL, st->index); | |
1315 | } | |
1316 | /* all remaining packets are now in parse_queue => | |
1317 | * really terminate parsing */ | |
1318 | break; | |
1319 | } | |
1320 | ret = 0; | |
1321 | st = s->streams[cur_pkt.stream_index]; | |
1322 | ||
1323 | if (cur_pkt.pts != AV_NOPTS_VALUE && | |
1324 | cur_pkt.dts != AV_NOPTS_VALUE && | |
1325 | cur_pkt.pts < cur_pkt.dts) { | |
1326 | av_log(s, AV_LOG_WARNING, | |
1327 | "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n", | |
1328 | cur_pkt.stream_index, | |
1329 | av_ts2str(cur_pkt.pts), | |
1330 | av_ts2str(cur_pkt.dts), | |
1331 | cur_pkt.size); | |
1332 | } | |
1333 | if (s->debug & FF_FDEBUG_TS) | |
1334 | av_log(s, AV_LOG_DEBUG, | |
1335 | "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n", | |
1336 | cur_pkt.stream_index, | |
1337 | av_ts2str(cur_pkt.pts), | |
1338 | av_ts2str(cur_pkt.dts), | |
1339 | cur_pkt.size, cur_pkt.duration, cur_pkt.flags); | |
1340 | ||
1341 | if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) { | |
1342 | st->parser = av_parser_init(st->codec->codec_id); | |
1343 | if (!st->parser) { | |
1344 | av_log(s, AV_LOG_VERBOSE, "parser not found for codec " | |
1345 | "%s, packets or times may be invalid.\n", | |
1346 | avcodec_get_name(st->codec->codec_id)); | |
1347 | /* no parser available: just output the raw packets */ | |
1348 | st->need_parsing = AVSTREAM_PARSE_NONE; | |
1349 | } else if (st->need_parsing == AVSTREAM_PARSE_HEADERS) | |
1350 | st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; | |
1351 | else if (st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) | |
1352 | st->parser->flags |= PARSER_FLAG_ONCE; | |
1353 | else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) | |
1354 | st->parser->flags |= PARSER_FLAG_USE_CODEC_TS; | |
1355 | } | |
1356 | ||
1357 | if (!st->need_parsing || !st->parser) { | |
1358 | /* no parsing needed: we just output the packet as is */ | |
1359 | *pkt = cur_pkt; | |
1360 | compute_pkt_fields(s, st, NULL, pkt); | |
1361 | if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && | |
1362 | (pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) { | |
1363 | ff_reduce_index(s, st->index); | |
1364 | av_add_index_entry(st, pkt->pos, pkt->dts, | |
1365 | 0, 0, AVINDEX_KEYFRAME); | |
1366 | } | |
1367 | got_packet = 1; | |
1368 | } else if (st->discard < AVDISCARD_ALL) { | |
1369 | if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0) | |
1370 | return ret; | |
1371 | } else { | |
1372 | /* free packet */ | |
1373 | av_free_packet(&cur_pkt); | |
1374 | } | |
1375 | if (pkt->flags & AV_PKT_FLAG_KEY) | |
1376 | st->skip_to_keyframe = 0; | |
1377 | if (st->skip_to_keyframe) { | |
1378 | av_free_packet(&cur_pkt); | |
1379 | if (got_packet) { | |
1380 | *pkt = cur_pkt; | |
1381 | } | |
1382 | got_packet = 0; | |
1383 | } | |
1384 | } | |
1385 | ||
1386 | if (!got_packet && s->parse_queue) | |
1387 | ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt); | |
1388 | ||
1389 | if (ret >= 0) { | |
1390 | AVStream *st = s->streams[pkt->stream_index]; | |
f6fa7814 DM |
1391 | int discard_padding = 0; |
1392 | if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) { | |
1393 | int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0); | |
1394 | int64_t sample = ts_to_samples(st, pts); | |
1395 | int duration = ts_to_samples(st, pkt->duration); | |
1396 | int64_t end_sample = sample + duration; | |
1397 | if (duration > 0 && end_sample >= st->first_discard_sample && | |
1398 | sample < st->last_discard_sample) | |
1399 | discard_padding = FFMIN(end_sample - st->first_discard_sample, duration); | |
1400 | } | |
1401 | if (st->skip_samples || discard_padding) { | |
2ba45a60 DM |
1402 | uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10); |
1403 | if (p) { | |
1404 | AV_WL32(p, st->skip_samples); | |
f6fa7814 | 1405 | AV_WL32(p + 4, discard_padding); |
2ba45a60 DM |
1406 | av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples); |
1407 | } | |
1408 | st->skip_samples = 0; | |
1409 | } | |
1410 | ||
1411 | if (st->inject_global_side_data) { | |
1412 | for (i = 0; i < st->nb_side_data; i++) { | |
1413 | AVPacketSideData *src_sd = &st->side_data[i]; | |
1414 | uint8_t *dst_data; | |
1415 | ||
1416 | if (av_packet_get_side_data(pkt, src_sd->type, NULL)) | |
1417 | continue; | |
1418 | ||
1419 | dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size); | |
1420 | if (!dst_data) { | |
1421 | av_log(s, AV_LOG_WARNING, "Could not inject global side data\n"); | |
1422 | continue; | |
1423 | } | |
1424 | ||
1425 | memcpy(dst_data, src_sd->data, src_sd->size); | |
1426 | } | |
1427 | st->inject_global_side_data = 0; | |
1428 | } | |
1429 | ||
1430 | if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA)) | |
1431 | av_packet_merge_side_data(pkt); | |
1432 | } | |
1433 | ||
1434 | av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata); | |
1435 | if (metadata) { | |
1436 | s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED; | |
1437 | av_dict_copy(&s->metadata, metadata, 0); | |
1438 | av_dict_free(&metadata); | |
1439 | av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN); | |
1440 | } | |
1441 | ||
1442 | if (s->debug & FF_FDEBUG_TS) | |
1443 | av_log(s, AV_LOG_DEBUG, | |
1444 | "read_frame_internal stream=%d, pts=%s, dts=%s, " | |
1445 | "size=%d, duration=%d, flags=%d\n", | |
1446 | pkt->stream_index, | |
1447 | av_ts2str(pkt->pts), | |
1448 | av_ts2str(pkt->dts), | |
1449 | pkt->size, pkt->duration, pkt->flags); | |
1450 | ||
1451 | return ret; | |
1452 | } | |
1453 | ||
1454 | int av_read_frame(AVFormatContext *s, AVPacket *pkt) | |
1455 | { | |
1456 | const int genpts = s->flags & AVFMT_FLAG_GENPTS; | |
1457 | int eof = 0; | |
1458 | int ret; | |
1459 | AVStream *st; | |
1460 | ||
1461 | if (!genpts) { | |
1462 | ret = s->packet_buffer | |
1463 | ? read_from_packet_buffer(&s->packet_buffer, | |
1464 | &s->packet_buffer_end, pkt) | |
1465 | : read_frame_internal(s, pkt); | |
1466 | if (ret < 0) | |
1467 | return ret; | |
1468 | goto return_packet; | |
1469 | } | |
1470 | ||
1471 | for (;;) { | |
1472 | AVPacketList *pktl = s->packet_buffer; | |
1473 | ||
1474 | if (pktl) { | |
1475 | AVPacket *next_pkt = &pktl->pkt; | |
1476 | ||
1477 | if (next_pkt->dts != AV_NOPTS_VALUE) { | |
1478 | int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits; | |
1479 | // last dts seen for this stream. if any of packets following | |
1480 | // current one had no dts, we will set this to AV_NOPTS_VALUE. | |
1481 | int64_t last_dts = next_pkt->dts; | |
1482 | while (pktl && next_pkt->pts == AV_NOPTS_VALUE) { | |
1483 | if (pktl->pkt.stream_index == next_pkt->stream_index && | |
1484 | (av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) { | |
1485 | if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { | |
1486 | // not B-frame | |
1487 | next_pkt->pts = pktl->pkt.dts; | |
1488 | } | |
1489 | if (last_dts != AV_NOPTS_VALUE) { | |
1490 | // Once last dts was set to AV_NOPTS_VALUE, we don't change it. | |
1491 | last_dts = pktl->pkt.dts; | |
1492 | } | |
1493 | } | |
1494 | pktl = pktl->next; | |
1495 | } | |
1496 | if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) { | |
1497 | // Fixing the last reference frame had none pts issue (For MXF etc). | |
1498 | // We only do this when | |
1499 | // 1. eof. | |
1500 | // 2. we are not able to resolve a pts value for current packet. | |
1501 | // 3. the packets for this stream at the end of the files had valid dts. | |
1502 | next_pkt->pts = last_dts + next_pkt->duration; | |
1503 | } | |
1504 | pktl = s->packet_buffer; | |
1505 | } | |
1506 | ||
1507 | /* read packet from packet buffer, if there is data */ | |
1508 | st = s->streams[next_pkt->stream_index]; | |
1509 | if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL && | |
1510 | next_pkt->dts != AV_NOPTS_VALUE && !eof)) { | |
1511 | ret = read_from_packet_buffer(&s->packet_buffer, | |
1512 | &s->packet_buffer_end, pkt); | |
1513 | goto return_packet; | |
1514 | } | |
1515 | } | |
1516 | ||
1517 | ret = read_frame_internal(s, pkt); | |
1518 | if (ret < 0) { | |
1519 | if (pktl && ret != AVERROR(EAGAIN)) { | |
1520 | eof = 1; | |
1521 | continue; | |
1522 | } else | |
1523 | return ret; | |
1524 | } | |
1525 | ||
1526 | if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt, | |
1527 | &s->packet_buffer_end)) < 0) | |
1528 | return AVERROR(ENOMEM); | |
1529 | } | |
1530 | ||
1531 | return_packet: | |
1532 | ||
1533 | st = s->streams[pkt->stream_index]; | |
1534 | if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) { | |
1535 | ff_reduce_index(s, st->index); | |
1536 | av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME); | |
1537 | } | |
1538 | ||
1539 | if (is_relative(pkt->dts)) | |
1540 | pkt->dts -= RELATIVE_TS_BASE; | |
1541 | if (is_relative(pkt->pts)) | |
1542 | pkt->pts -= RELATIVE_TS_BASE; | |
1543 | ||
1544 | return ret; | |
1545 | } | |
1546 | ||
1547 | /* XXX: suppress the packet queue */ | |
1548 | static void flush_packet_queue(AVFormatContext *s) | |
1549 | { | |
1550 | free_packet_buffer(&s->parse_queue, &s->parse_queue_end); | |
1551 | free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end); | |
1552 | free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end); | |
1553 | ||
1554 | s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; | |
1555 | } | |
1556 | ||
1557 | /*******************************************************/ | |
1558 | /* seek support */ | |
1559 | ||
1560 | int av_find_default_stream_index(AVFormatContext *s) | |
1561 | { | |
1562 | int i; | |
1563 | AVStream *st; | |
1564 | int best_stream = 0; | |
1565 | int best_score = -1; | |
1566 | ||
1567 | if (s->nb_streams <= 0) | |
1568 | return -1; | |
1569 | for (i = 0; i < s->nb_streams; i++) { | |
1570 | int score = 0; | |
1571 | st = s->streams[i]; | |
1572 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && | |
1573 | !(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) { | |
1574 | if (!st->codec->width && !st->codec->height && !st->codec_info_nb_frames) | |
1575 | score += 25; | |
1576 | else | |
1577 | score += 100; | |
1578 | } | |
1579 | if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { | |
1580 | if (!st->codec->sample_rate && !st->codec_info_nb_frames) | |
1581 | score += 12; | |
1582 | else | |
1583 | score += 50; | |
1584 | } | |
1585 | ||
1586 | if (score > best_score) { | |
1587 | best_score = score; | |
1588 | best_stream = i; | |
1589 | } | |
1590 | } | |
1591 | return best_stream; | |
1592 | } | |
1593 | ||
1594 | /** Flush the frame reader. */ | |
1595 | void ff_read_frame_flush(AVFormatContext *s) | |
1596 | { | |
1597 | AVStream *st; | |
1598 | int i, j; | |
1599 | ||
1600 | flush_packet_queue(s); | |
1601 | ||
1602 | /* Reset read state for each stream. */ | |
1603 | for (i = 0; i < s->nb_streams; i++) { | |
1604 | st = s->streams[i]; | |
1605 | ||
1606 | if (st->parser) { | |
1607 | av_parser_close(st->parser); | |
1608 | st->parser = NULL; | |
1609 | } | |
1610 | st->last_IP_pts = AV_NOPTS_VALUE; | |
1611 | st->last_dts_for_order_check = AV_NOPTS_VALUE; | |
1612 | if (st->first_dts == AV_NOPTS_VALUE) | |
1613 | st->cur_dts = RELATIVE_TS_BASE; | |
1614 | else | |
1615 | /* We set the current DTS to an unspecified origin. */ | |
1616 | st->cur_dts = AV_NOPTS_VALUE; | |
1617 | ||
1618 | st->probe_packets = MAX_PROBE_PACKETS; | |
1619 | ||
1620 | for (j = 0; j < MAX_REORDER_DELAY + 1; j++) | |
1621 | st->pts_buffer[j] = AV_NOPTS_VALUE; | |
1622 | ||
1623 | if (s->internal->inject_global_side_data) | |
1624 | st->inject_global_side_data = 1; | |
1625 | } | |
1626 | } | |
1627 | ||
1628 | void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp) | |
1629 | { | |
1630 | int i; | |
1631 | ||
1632 | for (i = 0; i < s->nb_streams; i++) { | |
1633 | AVStream *st = s->streams[i]; | |
1634 | ||
1635 | st->cur_dts = | |
1636 | av_rescale(timestamp, | |
1637 | st->time_base.den * (int64_t) ref_st->time_base.num, | |
1638 | st->time_base.num * (int64_t) ref_st->time_base.den); | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | void ff_reduce_index(AVFormatContext *s, int stream_index) | |
1643 | { | |
1644 | AVStream *st = s->streams[stream_index]; | |
1645 | unsigned int max_entries = s->max_index_size / sizeof(AVIndexEntry); | |
1646 | ||
1647 | if ((unsigned) st->nb_index_entries >= max_entries) { | |
1648 | int i; | |
1649 | for (i = 0; 2 * i < st->nb_index_entries; i++) | |
1650 | st->index_entries[i] = st->index_entries[2 * i]; | |
1651 | st->nb_index_entries = i; | |
1652 | } | |
1653 | } | |
1654 | ||
1655 | int ff_add_index_entry(AVIndexEntry **index_entries, | |
1656 | int *nb_index_entries, | |
1657 | unsigned int *index_entries_allocated_size, | |
1658 | int64_t pos, int64_t timestamp, | |
1659 | int size, int distance, int flags) | |
1660 | { | |
1661 | AVIndexEntry *entries, *ie; | |
1662 | int index; | |
1663 | ||
1664 | if ((unsigned) *nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) | |
1665 | return -1; | |
1666 | ||
1667 | if (timestamp == AV_NOPTS_VALUE) | |
1668 | return AVERROR(EINVAL); | |
1669 | ||
1670 | if (size < 0 || size > 0x3FFFFFFF) | |
1671 | return AVERROR(EINVAL); | |
1672 | ||
1673 | if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known | |
1674 | timestamp -= RELATIVE_TS_BASE; | |
1675 | ||
1676 | entries = av_fast_realloc(*index_entries, | |
1677 | index_entries_allocated_size, | |
1678 | (*nb_index_entries + 1) * | |
1679 | sizeof(AVIndexEntry)); | |
1680 | if (!entries) | |
1681 | return -1; | |
1682 | ||
1683 | *index_entries = entries; | |
1684 | ||
1685 | index = ff_index_search_timestamp(*index_entries, *nb_index_entries, | |
1686 | timestamp, AVSEEK_FLAG_ANY); | |
1687 | ||
1688 | if (index < 0) { | |
1689 | index = (*nb_index_entries)++; | |
1690 | ie = &entries[index]; | |
1691 | av_assert0(index == 0 || ie[-1].timestamp < timestamp); | |
1692 | } else { | |
1693 | ie = &entries[index]; | |
1694 | if (ie->timestamp != timestamp) { | |
1695 | if (ie->timestamp <= timestamp) | |
1696 | return -1; | |
1697 | memmove(entries + index + 1, entries + index, | |
1698 | sizeof(AVIndexEntry) * (*nb_index_entries - index)); | |
1699 | (*nb_index_entries)++; | |
1700 | } else if (ie->pos == pos && distance < ie->min_distance) | |
1701 | // do not reduce the distance | |
1702 | distance = ie->min_distance; | |
1703 | } | |
1704 | ||
1705 | ie->pos = pos; | |
1706 | ie->timestamp = timestamp; | |
1707 | ie->min_distance = distance; | |
1708 | ie->size = size; | |
1709 | ie->flags = flags; | |
1710 | ||
1711 | return index; | |
1712 | } | |
1713 | ||
1714 | int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, | |
1715 | int size, int distance, int flags) | |
1716 | { | |
1717 | timestamp = wrap_timestamp(st, timestamp); | |
1718 | return ff_add_index_entry(&st->index_entries, &st->nb_index_entries, | |
1719 | &st->index_entries_allocated_size, pos, | |
1720 | timestamp, size, distance, flags); | |
1721 | } | |
1722 | ||
1723 | int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, | |
1724 | int64_t wanted_timestamp, int flags) | |
1725 | { | |
1726 | int a, b, m; | |
1727 | int64_t timestamp; | |
1728 | ||
1729 | a = -1; | |
1730 | b = nb_entries; | |
1731 | ||
1732 | // Optimize appending index entries at the end. | |
1733 | if (b && entries[b - 1].timestamp < wanted_timestamp) | |
1734 | a = b - 1; | |
1735 | ||
1736 | while (b - a > 1) { | |
1737 | m = (a + b) >> 1; | |
1738 | timestamp = entries[m].timestamp; | |
1739 | if (timestamp >= wanted_timestamp) | |
1740 | b = m; | |
1741 | if (timestamp <= wanted_timestamp) | |
1742 | a = m; | |
1743 | } | |
1744 | m = (flags & AVSEEK_FLAG_BACKWARD) ? a : b; | |
1745 | ||
1746 | if (!(flags & AVSEEK_FLAG_ANY)) | |
1747 | while (m >= 0 && m < nb_entries && | |
1748 | !(entries[m].flags & AVINDEX_KEYFRAME)) | |
1749 | m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1; | |
1750 | ||
1751 | if (m == nb_entries) | |
1752 | return -1; | |
1753 | return m; | |
1754 | } | |
1755 | ||
1756 | int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, int flags) | |
1757 | { | |
1758 | return ff_index_search_timestamp(st->index_entries, st->nb_index_entries, | |
1759 | wanted_timestamp, flags); | |
1760 | } | |
1761 | ||
1762 | static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit, | |
1763 | int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )) | |
1764 | { | |
1765 | int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit); | |
1766 | if (stream_index >= 0) | |
1767 | ts = wrap_timestamp(s->streams[stream_index], ts); | |
1768 | return ts; | |
1769 | } | |
1770 | ||
1771 | int ff_seek_frame_binary(AVFormatContext *s, int stream_index, | |
1772 | int64_t target_ts, int flags) | |
1773 | { | |
1774 | AVInputFormat *avif = s->iformat; | |
1775 | int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit; | |
1776 | int64_t ts_min, ts_max, ts; | |
1777 | int index; | |
1778 | int64_t ret; | |
1779 | AVStream *st; | |
1780 | ||
1781 | if (stream_index < 0) | |
1782 | return -1; | |
1783 | ||
1784 | av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts)); | |
1785 | ||
1786 | ts_max = | |
1787 | ts_min = AV_NOPTS_VALUE; | |
1788 | pos_limit = -1; // GCC falsely says it may be uninitialized. | |
1789 | ||
1790 | st = s->streams[stream_index]; | |
1791 | if (st->index_entries) { | |
1792 | AVIndexEntry *e; | |
1793 | ||
1794 | /* FIXME: Whole function must be checked for non-keyframe entries in | |
1795 | * index case, especially read_timestamp(). */ | |
1796 | index = av_index_search_timestamp(st, target_ts, | |
1797 | flags | AVSEEK_FLAG_BACKWARD); | |
1798 | index = FFMAX(index, 0); | |
1799 | e = &st->index_entries[index]; | |
1800 | ||
1801 | if (e->timestamp <= target_ts || e->pos == e->min_distance) { | |
1802 | pos_min = e->pos; | |
1803 | ts_min = e->timestamp; | |
1804 | av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n", | |
1805 | pos_min, av_ts2str(ts_min)); | |
1806 | } else { | |
1807 | av_assert1(index == 0); | |
1808 | } | |
1809 | ||
1810 | index = av_index_search_timestamp(st, target_ts, | |
1811 | flags & ~AVSEEK_FLAG_BACKWARD); | |
1812 | av_assert0(index < st->nb_index_entries); | |
1813 | if (index >= 0) { | |
1814 | e = &st->index_entries[index]; | |
1815 | av_assert1(e->timestamp >= target_ts); | |
1816 | pos_max = e->pos; | |
1817 | ts_max = e->timestamp; | |
1818 | pos_limit = pos_max - e->min_distance; | |
1819 | av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64 | |
1820 | " dts_max=%s\n", pos_max, pos_limit, av_ts2str(ts_max)); | |
1821 | } | |
1822 | } | |
1823 | ||
1824 | pos = ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, | |
1825 | ts_min, ts_max, flags, &ts, avif->read_timestamp); | |
1826 | if (pos < 0) | |
1827 | return -1; | |
1828 | ||
1829 | /* do the seek */ | |
1830 | if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0) | |
1831 | return ret; | |
1832 | ||
1833 | ff_read_frame_flush(s); | |
1834 | ff_update_cur_dts(s, st, ts); | |
1835 | ||
1836 | return 0; | |
1837 | } | |
1838 | ||
1839 | int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos, | |
1840 | int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )) | |
1841 | { | |
1842 | int64_t step = 1024; | |
1843 | int64_t limit, ts_max; | |
1844 | int64_t filesize = avio_size(s->pb); | |
1845 | int64_t pos_max = filesize - 1; | |
1846 | do { | |
1847 | limit = pos_max; | |
1848 | pos_max = FFMAX(0, (pos_max) - step); | |
1849 | ts_max = ff_read_timestamp(s, stream_index, | |
1850 | &pos_max, limit, read_timestamp); | |
1851 | step += step; | |
1852 | } while (ts_max == AV_NOPTS_VALUE && 2*limit > step); | |
1853 | if (ts_max == AV_NOPTS_VALUE) | |
1854 | return -1; | |
1855 | ||
1856 | for (;;) { | |
1857 | int64_t tmp_pos = pos_max + 1; | |
1858 | int64_t tmp_ts = ff_read_timestamp(s, stream_index, | |
1859 | &tmp_pos, INT64_MAX, read_timestamp); | |
1860 | if (tmp_ts == AV_NOPTS_VALUE) | |
1861 | break; | |
1862 | av_assert0(tmp_pos > pos_max); | |
1863 | ts_max = tmp_ts; | |
1864 | pos_max = tmp_pos; | |
1865 | if (tmp_pos >= filesize) | |
1866 | break; | |
1867 | } | |
1868 | ||
1869 | if (ts) | |
1870 | *ts = ts_max; | |
1871 | if (pos) | |
1872 | *pos = pos_max; | |
1873 | ||
1874 | return 0; | |
1875 | } | |
1876 | ||
1877 | int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, | |
1878 | int64_t pos_min, int64_t pos_max, int64_t pos_limit, | |
1879 | int64_t ts_min, int64_t ts_max, | |
1880 | int flags, int64_t *ts_ret, | |
1881 | int64_t (*read_timestamp)(struct AVFormatContext *, int, | |
1882 | int64_t *, int64_t)) | |
1883 | { | |
1884 | int64_t pos, ts; | |
1885 | int64_t start_pos; | |
1886 | int no_change; | |
1887 | int ret; | |
1888 | ||
1889 | av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts)); | |
1890 | ||
1891 | if (ts_min == AV_NOPTS_VALUE) { | |
1892 | pos_min = s->data_offset; | |
1893 | ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); | |
1894 | if (ts_min == AV_NOPTS_VALUE) | |
1895 | return -1; | |
1896 | } | |
1897 | ||
1898 | if (ts_min >= target_ts) { | |
1899 | *ts_ret = ts_min; | |
1900 | return pos_min; | |
1901 | } | |
1902 | ||
1903 | if (ts_max == AV_NOPTS_VALUE) { | |
1904 | if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0) | |
1905 | return ret; | |
1906 | pos_limit = pos_max; | |
1907 | } | |
1908 | ||
1909 | if (ts_max <= target_ts) { | |
1910 | *ts_ret = ts_max; | |
1911 | return pos_max; | |
1912 | } | |
1913 | ||
1914 | if (ts_min > ts_max) | |
1915 | return -1; | |
1916 | else if (ts_min == ts_max) | |
1917 | pos_limit = pos_min; | |
1918 | ||
1919 | no_change = 0; | |
1920 | while (pos_min < pos_limit) { | |
1921 | av_dlog(s, | |
1922 | "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n", | |
1923 | pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max)); | |
1924 | assert(pos_limit <= pos_max); | |
1925 | ||
1926 | if (no_change == 0) { | |
1927 | int64_t approximate_keyframe_distance = pos_max - pos_limit; | |
1928 | // interpolate position (better than dichotomy) | |
1929 | pos = av_rescale(target_ts - ts_min, pos_max - pos_min, | |
1930 | ts_max - ts_min) + | |
1931 | pos_min - approximate_keyframe_distance; | |
1932 | } else if (no_change == 1) { | |
1933 | // bisection if interpolation did not change min / max pos last time | |
1934 | pos = (pos_min + pos_limit) >> 1; | |
1935 | } else { | |
1936 | /* linear search if bisection failed, can only happen if there | |
1937 | * are very few or no keyframes between min/max */ | |
1938 | pos = pos_min; | |
1939 | } | |
1940 | if (pos <= pos_min) | |
1941 | pos = pos_min + 1; | |
1942 | else if (pos > pos_limit) | |
1943 | pos = pos_limit; | |
1944 | start_pos = pos; | |
1945 | ||
1946 | // May pass pos_limit instead of -1. | |
1947 | ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); | |
1948 | if (pos == pos_max) | |
1949 | no_change++; | |
1950 | else | |
1951 | no_change = 0; | |
1952 | av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s" | |
1953 | " target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n", | |
1954 | pos_min, pos, pos_max, | |
1955 | av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts), | |
1956 | pos_limit, start_pos, no_change); | |
1957 | if (ts == AV_NOPTS_VALUE) { | |
1958 | av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n"); | |
1959 | return -1; | |
1960 | } | |
1961 | if (target_ts <= ts) { | |
1962 | pos_limit = start_pos - 1; | |
1963 | pos_max = pos; | |
1964 | ts_max = ts; | |
1965 | } | |
1966 | if (target_ts >= ts) { | |
1967 | pos_min = pos; | |
1968 | ts_min = ts; | |
1969 | } | |
1970 | } | |
1971 | ||
1972 | pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; | |
1973 | ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; | |
1974 | #if 0 | |
1975 | pos_min = pos; | |
1976 | ts_min = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); | |
1977 | pos_min++; | |
1978 | ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); | |
1979 | av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n", | |
1980 | pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max)); | |
1981 | #endif | |
1982 | *ts_ret = ts; | |
1983 | return pos; | |
1984 | } | |
1985 | ||
1986 | static int seek_frame_byte(AVFormatContext *s, int stream_index, | |
1987 | int64_t pos, int flags) | |
1988 | { | |
1989 | int64_t pos_min, pos_max; | |
1990 | ||
1991 | pos_min = s->data_offset; | |
1992 | pos_max = avio_size(s->pb) - 1; | |
1993 | ||
1994 | if (pos < pos_min) | |
1995 | pos = pos_min; | |
1996 | else if (pos > pos_max) | |
1997 | pos = pos_max; | |
1998 | ||
1999 | avio_seek(s->pb, pos, SEEK_SET); | |
2000 | ||
2001 | s->io_repositioned = 1; | |
2002 | ||
2003 | return 0; | |
2004 | } | |
2005 | ||
2006 | static int seek_frame_generic(AVFormatContext *s, int stream_index, | |
2007 | int64_t timestamp, int flags) | |
2008 | { | |
2009 | int index; | |
2010 | int64_t ret; | |
2011 | AVStream *st; | |
2012 | AVIndexEntry *ie; | |
2013 | ||
2014 | st = s->streams[stream_index]; | |
2015 | ||
2016 | index = av_index_search_timestamp(st, timestamp, flags); | |
2017 | ||
2018 | if (index < 0 && st->nb_index_entries && | |
2019 | timestamp < st->index_entries[0].timestamp) | |
2020 | return -1; | |
2021 | ||
2022 | if (index < 0 || index == st->nb_index_entries - 1) { | |
2023 | AVPacket pkt; | |
2024 | int nonkey = 0; | |
2025 | ||
2026 | if (st->nb_index_entries) { | |
2027 | av_assert0(st->index_entries); | |
2028 | ie = &st->index_entries[st->nb_index_entries - 1]; | |
2029 | if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) | |
2030 | return ret; | |
2031 | ff_update_cur_dts(s, st, ie->timestamp); | |
2032 | } else { | |
2033 | if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0) | |
2034 | return ret; | |
2035 | } | |
2036 | for (;;) { | |
2037 | int read_status; | |
2038 | do { | |
2039 | read_status = av_read_frame(s, &pkt); | |
2040 | } while (read_status == AVERROR(EAGAIN)); | |
2041 | if (read_status < 0) | |
2042 | break; | |
2043 | av_free_packet(&pkt); | |
2044 | if (stream_index == pkt.stream_index && pkt.dts > timestamp) { | |
2045 | if (pkt.flags & AV_PKT_FLAG_KEY) | |
2046 | break; | |
2047 | if (nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS) { | |
2048 | av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey); | |
2049 | break; | |
2050 | } | |
2051 | } | |
2052 | } | |
2053 | index = av_index_search_timestamp(st, timestamp, flags); | |
2054 | } | |
2055 | if (index < 0) | |
2056 | return -1; | |
2057 | ||
2058 | ff_read_frame_flush(s); | |
2059 | if (s->iformat->read_seek) | |
2060 | if (s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0) | |
2061 | return 0; | |
2062 | ie = &st->index_entries[index]; | |
2063 | if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) | |
2064 | return ret; | |
2065 | ff_update_cur_dts(s, st, ie->timestamp); | |
2066 | ||
2067 | return 0; | |
2068 | } | |
2069 | ||
2070 | static int seek_frame_internal(AVFormatContext *s, int stream_index, | |
2071 | int64_t timestamp, int flags) | |
2072 | { | |
2073 | int ret; | |
2074 | AVStream *st; | |
2075 | ||
2076 | if (flags & AVSEEK_FLAG_BYTE) { | |
2077 | if (s->iformat->flags & AVFMT_NO_BYTE_SEEK) | |
2078 | return -1; | |
2079 | ff_read_frame_flush(s); | |
2080 | return seek_frame_byte(s, stream_index, timestamp, flags); | |
2081 | } | |
2082 | ||
2083 | if (stream_index < 0) { | |
2084 | stream_index = av_find_default_stream_index(s); | |
2085 | if (stream_index < 0) | |
2086 | return -1; | |
2087 | ||
2088 | st = s->streams[stream_index]; | |
2089 | /* timestamp for default must be expressed in AV_TIME_BASE units */ | |
2090 | timestamp = av_rescale(timestamp, st->time_base.den, | |
2091 | AV_TIME_BASE * (int64_t) st->time_base.num); | |
2092 | } | |
2093 | ||
2094 | /* first, we try the format specific seek */ | |
2095 | if (s->iformat->read_seek) { | |
2096 | ff_read_frame_flush(s); | |
2097 | ret = s->iformat->read_seek(s, stream_index, timestamp, flags); | |
2098 | } else | |
2099 | ret = -1; | |
2100 | if (ret >= 0) | |
2101 | return 0; | |
2102 | ||
2103 | if (s->iformat->read_timestamp && | |
2104 | !(s->iformat->flags & AVFMT_NOBINSEARCH)) { | |
2105 | ff_read_frame_flush(s); | |
2106 | return ff_seek_frame_binary(s, stream_index, timestamp, flags); | |
2107 | } else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) { | |
2108 | ff_read_frame_flush(s); | |
2109 | return seek_frame_generic(s, stream_index, timestamp, flags); | |
2110 | } else | |
2111 | return -1; | |
2112 | } | |
2113 | ||
2114 | int av_seek_frame(AVFormatContext *s, int stream_index, | |
2115 | int64_t timestamp, int flags) | |
2116 | { | |
2117 | int ret; | |
2118 | ||
2119 | if (s->iformat->read_seek2 && !s->iformat->read_seek) { | |
2120 | int64_t min_ts = INT64_MIN, max_ts = INT64_MAX; | |
2121 | if ((flags & AVSEEK_FLAG_BACKWARD)) | |
2122 | max_ts = timestamp; | |
2123 | else | |
2124 | min_ts = timestamp; | |
2125 | return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts, | |
2126 | flags & ~AVSEEK_FLAG_BACKWARD); | |
2127 | } | |
2128 | ||
2129 | ret = seek_frame_internal(s, stream_index, timestamp, flags); | |
2130 | ||
2131 | if (ret >= 0) | |
2132 | ret = avformat_queue_attached_pictures(s); | |
2133 | ||
2134 | return ret; | |
2135 | } | |
2136 | ||
2137 | int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, | |
2138 | int64_t ts, int64_t max_ts, int flags) | |
2139 | { | |
2140 | if (min_ts > ts || max_ts < ts) | |
2141 | return -1; | |
2142 | if (stream_index < -1 || stream_index >= (int)s->nb_streams) | |
2143 | return AVERROR(EINVAL); | |
2144 | ||
2145 | if (s->seek2any>0) | |
2146 | flags |= AVSEEK_FLAG_ANY; | |
2147 | flags &= ~AVSEEK_FLAG_BACKWARD; | |
2148 | ||
2149 | if (s->iformat->read_seek2) { | |
2150 | int ret; | |
2151 | ff_read_frame_flush(s); | |
2152 | ||
2153 | if (stream_index == -1 && s->nb_streams == 1) { | |
2154 | AVRational time_base = s->streams[0]->time_base; | |
2155 | ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base); | |
2156 | min_ts = av_rescale_rnd(min_ts, time_base.den, | |
2157 | time_base.num * (int64_t)AV_TIME_BASE, | |
2158 | AV_ROUND_UP | AV_ROUND_PASS_MINMAX); | |
2159 | max_ts = av_rescale_rnd(max_ts, time_base.den, | |
2160 | time_base.num * (int64_t)AV_TIME_BASE, | |
2161 | AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX); | |
2162 | } | |
2163 | ||
2164 | ret = s->iformat->read_seek2(s, stream_index, min_ts, | |
2165 | ts, max_ts, flags); | |
2166 | ||
2167 | if (ret >= 0) | |
2168 | ret = avformat_queue_attached_pictures(s); | |
2169 | return ret; | |
2170 | } | |
2171 | ||
2172 | if (s->iformat->read_timestamp) { | |
2173 | // try to seek via read_timestamp() | |
2174 | } | |
2175 | ||
2176 | // Fall back on old API if new is not implemented but old is. | |
2177 | // Note the old API has somewhat different semantics. | |
2178 | if (s->iformat->read_seek || 1) { | |
2179 | int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0); | |
2180 | int ret = av_seek_frame(s, stream_index, ts, flags | dir); | |
2181 | if (ret<0 && ts != min_ts && max_ts != ts) { | |
2182 | ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir); | |
2183 | if (ret >= 0) | |
2184 | ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD)); | |
2185 | } | |
2186 | return ret; | |
2187 | } | |
2188 | ||
2189 | // try some generic seek like seek_frame_generic() but with new ts semantics | |
2190 | return -1; //unreachable | |
2191 | } | |
2192 | ||
2193 | /*******************************************************/ | |
2194 | ||
2195 | /** | |
2196 | * Return TRUE if the stream has accurate duration in any stream. | |
2197 | * | |
2198 | * @return TRUE if the stream has accurate duration for at least one component. | |
2199 | */ | |
2200 | static int has_duration(AVFormatContext *ic) | |
2201 | { | |
2202 | int i; | |
2203 | AVStream *st; | |
2204 | ||
2205 | for (i = 0; i < ic->nb_streams; i++) { | |
2206 | st = ic->streams[i]; | |
2207 | if (st->duration != AV_NOPTS_VALUE) | |
2208 | return 1; | |
2209 | } | |
2210 | if (ic->duration != AV_NOPTS_VALUE) | |
2211 | return 1; | |
2212 | return 0; | |
2213 | } | |
2214 | ||
2215 | /** | |
2216 | * Estimate the stream timings from the one of each components. | |
2217 | * | |
2218 | * Also computes the global bitrate if possible. | |
2219 | */ | |
2220 | static void update_stream_timings(AVFormatContext *ic) | |
2221 | { | |
2222 | int64_t start_time, start_time1, start_time_text, end_time, end_time1; | |
2223 | int64_t duration, duration1, filesize; | |
2224 | int i; | |
2225 | AVStream *st; | |
2226 | AVProgram *p; | |
2227 | ||
2228 | start_time = INT64_MAX; | |
2229 | start_time_text = INT64_MAX; | |
2230 | end_time = INT64_MIN; | |
2231 | duration = INT64_MIN; | |
2232 | for (i = 0; i < ic->nb_streams; i++) { | |
2233 | st = ic->streams[i]; | |
2234 | if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) { | |
2235 | start_time1 = av_rescale_q(st->start_time, st->time_base, | |
2236 | AV_TIME_BASE_Q); | |
2237 | if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) { | |
2238 | if (start_time1 < start_time_text) | |
2239 | start_time_text = start_time1; | |
2240 | } else | |
2241 | start_time = FFMIN(start_time, start_time1); | |
2242 | end_time1 = AV_NOPTS_VALUE; | |
2243 | if (st->duration != AV_NOPTS_VALUE) { | |
2244 | end_time1 = start_time1 + | |
2245 | av_rescale_q(st->duration, st->time_base, | |
2246 | AV_TIME_BASE_Q); | |
2247 | end_time = FFMAX(end_time, end_time1); | |
2248 | } | |
2249 | for (p = NULL; (p = av_find_program_from_stream(ic, p, i)); ) { | |
2250 | if (p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1) | |
2251 | p->start_time = start_time1; | |
2252 | if (p->end_time < end_time1) | |
2253 | p->end_time = end_time1; | |
2254 | } | |
2255 | } | |
2256 | if (st->duration != AV_NOPTS_VALUE) { | |
2257 | duration1 = av_rescale_q(st->duration, st->time_base, | |
2258 | AV_TIME_BASE_Q); | |
2259 | duration = FFMAX(duration, duration1); | |
2260 | } | |
2261 | } | |
2262 | if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE)) | |
2263 | start_time = start_time_text; | |
2264 | else if (start_time > start_time_text) | |
2265 | av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE); | |
2266 | ||
2267 | if (start_time != INT64_MAX) { | |
2268 | ic->start_time = start_time; | |
2269 | if (end_time != INT64_MIN) { | |
2270 | if (ic->nb_programs) { | |
2271 | for (i = 0; i < ic->nb_programs; i++) { | |
2272 | p = ic->programs[i]; | |
2273 | if (p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time) | |
2274 | duration = FFMAX(duration, p->end_time - p->start_time); | |
2275 | } | |
2276 | } else | |
2277 | duration = FFMAX(duration, end_time - start_time); | |
2278 | } | |
2279 | } | |
2280 | if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) { | |
2281 | ic->duration = duration; | |
2282 | } | |
2283 | if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) { | |
2284 | /* compute the bitrate */ | |
2285 | double bitrate = (double) filesize * 8.0 * AV_TIME_BASE / | |
2286 | (double) ic->duration; | |
2287 | if (bitrate >= 0 && bitrate <= INT_MAX) | |
2288 | ic->bit_rate = bitrate; | |
2289 | } | |
2290 | } | |
2291 | ||
2292 | static void fill_all_stream_timings(AVFormatContext *ic) | |
2293 | { | |
2294 | int i; | |
2295 | AVStream *st; | |
2296 | ||
2297 | update_stream_timings(ic); | |
2298 | for (i = 0; i < ic->nb_streams; i++) { | |
2299 | st = ic->streams[i]; | |
2300 | if (st->start_time == AV_NOPTS_VALUE) { | |
2301 | if (ic->start_time != AV_NOPTS_VALUE) | |
2302 | st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, | |
2303 | st->time_base); | |
2304 | if (ic->duration != AV_NOPTS_VALUE) | |
2305 | st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, | |
2306 | st->time_base); | |
2307 | } | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | static void estimate_timings_from_bit_rate(AVFormatContext *ic) | |
2312 | { | |
2313 | int64_t filesize, duration; | |
2314 | int i, show_warning = 0; | |
2315 | AVStream *st; | |
2316 | ||
2317 | /* if bit_rate is already set, we believe it */ | |
2318 | if (ic->bit_rate <= 0) { | |
2319 | int bit_rate = 0; | |
2320 | for (i = 0; i < ic->nb_streams; i++) { | |
2321 | st = ic->streams[i]; | |
2322 | if (st->codec->bit_rate > 0) { | |
2323 | if (INT_MAX - st->codec->bit_rate < bit_rate) { | |
2324 | bit_rate = 0; | |
2325 | break; | |
2326 | } | |
2327 | bit_rate += st->codec->bit_rate; | |
2328 | } | |
2329 | } | |
2330 | ic->bit_rate = bit_rate; | |
2331 | } | |
2332 | ||
2333 | /* if duration is already set, we believe it */ | |
2334 | if (ic->duration == AV_NOPTS_VALUE && | |
2335 | ic->bit_rate != 0) { | |
2336 | filesize = ic->pb ? avio_size(ic->pb) : 0; | |
2337 | if (filesize > ic->data_offset) { | |
2338 | filesize -= ic->data_offset; | |
2339 | for (i = 0; i < ic->nb_streams; i++) { | |
2340 | st = ic->streams[i]; | |
2341 | if ( st->time_base.num <= INT64_MAX / ic->bit_rate | |
2342 | && st->duration == AV_NOPTS_VALUE) { | |
2343 | duration = av_rescale(8 * filesize, st->time_base.den, | |
2344 | ic->bit_rate * | |
2345 | (int64_t) st->time_base.num); | |
2346 | st->duration = duration; | |
2347 | show_warning = 1; | |
2348 | } | |
2349 | } | |
2350 | } | |
2351 | } | |
2352 | if (show_warning) | |
2353 | av_log(ic, AV_LOG_WARNING, | |
2354 | "Estimating duration from bitrate, this may be inaccurate\n"); | |
2355 | } | |
2356 | ||
2357 | #define DURATION_MAX_READ_SIZE 250000LL | |
2358 | #define DURATION_MAX_RETRY 4 | |
2359 | ||
2360 | /* only usable for MPEG-PS streams */ | |
2361 | static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset) | |
2362 | { | |
2363 | AVPacket pkt1, *pkt = &pkt1; | |
2364 | AVStream *st; | |
2365 | int num, den, read_size, i, ret; | |
2366 | int found_duration = 0; | |
2367 | int is_end; | |
2368 | int64_t filesize, offset, duration; | |
2369 | int retry = 0; | |
2370 | ||
2371 | /* flush packet queue */ | |
2372 | flush_packet_queue(ic); | |
2373 | ||
2374 | for (i = 0; i < ic->nb_streams; i++) { | |
2375 | st = ic->streams[i]; | |
2376 | if (st->start_time == AV_NOPTS_VALUE && | |
2377 | st->first_dts == AV_NOPTS_VALUE && | |
2378 | st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) | |
2379 | av_log(st->codec, AV_LOG_WARNING, | |
2380 | "start time for stream %d is not set in estimate_timings_from_pts\n", i); | |
2381 | ||
2382 | if (st->parser) { | |
2383 | av_parser_close(st->parser); | |
2384 | st->parser = NULL; | |
2385 | } | |
2386 | } | |
2387 | ||
2388 | av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN); | |
2389 | /* estimate the end time (duration) */ | |
2390 | /* XXX: may need to support wrapping */ | |
2391 | filesize = ic->pb ? avio_size(ic->pb) : 0; | |
2392 | do { | |
2393 | is_end = found_duration; | |
2394 | offset = filesize - (DURATION_MAX_READ_SIZE << retry); | |
2395 | if (offset < 0) | |
2396 | offset = 0; | |
2397 | ||
2398 | avio_seek(ic->pb, offset, SEEK_SET); | |
2399 | read_size = 0; | |
2400 | for (;;) { | |
2401 | if (read_size >= DURATION_MAX_READ_SIZE << (FFMAX(retry - 1, 0))) | |
2402 | break; | |
2403 | ||
2404 | do { | |
2405 | ret = ff_read_packet(ic, pkt); | |
2406 | } while (ret == AVERROR(EAGAIN)); | |
2407 | if (ret != 0) | |
2408 | break; | |
2409 | read_size += pkt->size; | |
2410 | st = ic->streams[pkt->stream_index]; | |
2411 | if (pkt->pts != AV_NOPTS_VALUE && | |
2412 | (st->start_time != AV_NOPTS_VALUE || | |
2413 | st->first_dts != AV_NOPTS_VALUE)) { | |
2414 | if (pkt->duration == 0) { | |
f6fa7814 | 2415 | ff_compute_frame_duration(ic, &num, &den, st, st->parser, pkt); |
2ba45a60 DM |
2416 | if (den && num) { |
2417 | pkt->duration = av_rescale_rnd(1, | |
2418 | num * (int64_t) st->time_base.den, | |
2419 | den * (int64_t) st->time_base.num, | |
2420 | AV_ROUND_DOWN); | |
2421 | } | |
2422 | } | |
2423 | duration = pkt->pts + pkt->duration; | |
2424 | found_duration = 1; | |
2425 | if (st->start_time != AV_NOPTS_VALUE) | |
2426 | duration -= st->start_time; | |
2427 | else | |
2428 | duration -= st->first_dts; | |
2429 | if (duration > 0) { | |
2430 | if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 || | |
2431 | (st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num)) | |
2432 | st->duration = duration; | |
2433 | st->info->last_duration = duration; | |
2434 | } | |
2435 | } | |
2436 | av_free_packet(pkt); | |
2437 | } | |
2438 | ||
2439 | /* check if all audio/video streams have valid duration */ | |
2440 | if (!is_end) { | |
2441 | is_end = 1; | |
2442 | for (i = 0; i < ic->nb_streams; i++) { | |
2443 | st = ic->streams[i]; | |
2444 | switch (st->codec->codec_type) { | |
2445 | case AVMEDIA_TYPE_VIDEO: | |
2446 | case AVMEDIA_TYPE_AUDIO: | |
2447 | if (st->duration == AV_NOPTS_VALUE) | |
2448 | is_end = 0; | |
2449 | } | |
2450 | } | |
2451 | } | |
2452 | } while (!is_end && | |
2453 | offset && | |
2454 | ++retry <= DURATION_MAX_RETRY); | |
2455 | ||
2456 | av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN); | |
2457 | ||
2458 | /* warn about audio/video streams which duration could not be estimated */ | |
2459 | for (i = 0; i < ic->nb_streams; i++) { | |
2460 | st = ic->streams[i]; | |
2461 | if (st->duration == AV_NOPTS_VALUE) { | |
2462 | switch (st->codec->codec_type) { | |
2463 | case AVMEDIA_TYPE_VIDEO: | |
2464 | case AVMEDIA_TYPE_AUDIO: | |
2465 | if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) { | |
2466 | av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i); | |
2467 | } else | |
2468 | av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i); | |
2469 | } | |
2470 | } | |
2471 | } | |
2472 | fill_all_stream_timings(ic); | |
2473 | ||
2474 | avio_seek(ic->pb, old_offset, SEEK_SET); | |
2475 | for (i = 0; i < ic->nb_streams; i++) { | |
2476 | int j; | |
2477 | ||
2478 | st = ic->streams[i]; | |
2479 | st->cur_dts = st->first_dts; | |
2480 | st->last_IP_pts = AV_NOPTS_VALUE; | |
2481 | st->last_dts_for_order_check = AV_NOPTS_VALUE; | |
2482 | for (j = 0; j < MAX_REORDER_DELAY + 1; j++) | |
2483 | st->pts_buffer[j] = AV_NOPTS_VALUE; | |
2484 | } | |
2485 | } | |
2486 | ||
2487 | static void estimate_timings(AVFormatContext *ic, int64_t old_offset) | |
2488 | { | |
2489 | int64_t file_size; | |
2490 | ||
2491 | /* get the file size, if possible */ | |
2492 | if (ic->iformat->flags & AVFMT_NOFILE) { | |
2493 | file_size = 0; | |
2494 | } else { | |
2495 | file_size = avio_size(ic->pb); | |
2496 | file_size = FFMAX(0, file_size); | |
2497 | } | |
2498 | ||
2499 | if ((!strcmp(ic->iformat->name, "mpeg") || | |
2500 | !strcmp(ic->iformat->name, "mpegts")) && | |
2501 | file_size && ic->pb->seekable) { | |
2502 | /* get accurate estimate from the PTSes */ | |
2503 | estimate_timings_from_pts(ic, old_offset); | |
2504 | ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS; | |
2505 | } else if (has_duration(ic)) { | |
2506 | /* at least one component has timings - we use them for all | |
2507 | * the components */ | |
2508 | fill_all_stream_timings(ic); | |
2509 | ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM; | |
2510 | } else { | |
2511 | /* less precise: use bitrate info */ | |
2512 | estimate_timings_from_bit_rate(ic); | |
2513 | ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE; | |
2514 | } | |
2515 | update_stream_timings(ic); | |
2516 | ||
2517 | { | |
2518 | int i; | |
2519 | AVStream av_unused *st; | |
2520 | for (i = 0; i < ic->nb_streams; i++) { | |
2521 | st = ic->streams[i]; | |
2522 | av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i, | |
2523 | (double) st->start_time / AV_TIME_BASE, | |
2524 | (double) st->duration / AV_TIME_BASE); | |
2525 | } | |
2526 | av_dlog(ic, | |
2527 | "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n", | |
2528 | (double) ic->start_time / AV_TIME_BASE, | |
2529 | (double) ic->duration / AV_TIME_BASE, | |
2530 | ic->bit_rate / 1000); | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | static int has_codec_parameters(AVStream *st, const char **errmsg_ptr) | |
2535 | { | |
2536 | AVCodecContext *avctx = st->codec; | |
2537 | ||
2538 | #define FAIL(errmsg) do { \ | |
2539 | if (errmsg_ptr) \ | |
2540 | *errmsg_ptr = errmsg; \ | |
2541 | return 0; \ | |
2542 | } while (0) | |
2543 | ||
2544 | if ( avctx->codec_id == AV_CODEC_ID_NONE | |
2545 | && avctx->codec_type != AVMEDIA_TYPE_DATA) | |
2546 | FAIL("unknown codec"); | |
2547 | switch (avctx->codec_type) { | |
2548 | case AVMEDIA_TYPE_AUDIO: | |
2549 | if (!avctx->frame_size && determinable_frame_size(avctx)) | |
2550 | FAIL("unspecified frame size"); | |
2551 | if (st->info->found_decoder >= 0 && | |
2552 | avctx->sample_fmt == AV_SAMPLE_FMT_NONE) | |
2553 | FAIL("unspecified sample format"); | |
2554 | if (!avctx->sample_rate) | |
2555 | FAIL("unspecified sample rate"); | |
2556 | if (!avctx->channels) | |
2557 | FAIL("unspecified number of channels"); | |
2558 | if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS) | |
2559 | FAIL("no decodable DTS frames"); | |
2560 | break; | |
2561 | case AVMEDIA_TYPE_VIDEO: | |
2562 | if (!avctx->width) | |
2563 | FAIL("unspecified size"); | |
2564 | if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE) | |
2565 | FAIL("unspecified pixel format"); | |
2566 | if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40) | |
2567 | if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames) | |
2568 | FAIL("no frame in rv30/40 and no sar"); | |
2569 | break; | |
2570 | case AVMEDIA_TYPE_SUBTITLE: | |
2571 | if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width) | |
2572 | FAIL("unspecified size"); | |
2573 | break; | |
2574 | case AVMEDIA_TYPE_DATA: | |
2575 | if (avctx->codec_id == AV_CODEC_ID_NONE) return 1; | |
2576 | } | |
2577 | ||
2578 | return 1; | |
2579 | } | |
2580 | ||
2581 | /* returns 1 or 0 if or if not decoded data was returned, or a negative error */ | |
2582 | static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt, | |
2583 | AVDictionary **options) | |
2584 | { | |
2585 | const AVCodec *codec; | |
2586 | int got_picture = 1, ret = 0; | |
2587 | AVFrame *frame = av_frame_alloc(); | |
2588 | AVSubtitle subtitle; | |
2589 | AVPacket pkt = *avpkt; | |
2590 | ||
2591 | if (!frame) | |
2592 | return AVERROR(ENOMEM); | |
2593 | ||
2594 | if (!avcodec_is_open(st->codec) && | |
2595 | st->info->found_decoder <= 0 && | |
2596 | (st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) { | |
2597 | AVDictionary *thread_opt = NULL; | |
2598 | ||
2599 | codec = find_decoder(s, st, st->codec->codec_id); | |
2600 | ||
2601 | if (!codec) { | |
2602 | st->info->found_decoder = -st->codec->codec_id; | |
2603 | ret = -1; | |
2604 | goto fail; | |
2605 | } | |
2606 | ||
2607 | /* Force thread count to 1 since the H.264 decoder will not extract | |
2608 | * SPS and PPS to extradata during multi-threaded decoding. */ | |
2609 | av_dict_set(options ? options : &thread_opt, "threads", "1", 0); | |
f6fa7814 DM |
2610 | if (s->codec_whitelist) |
2611 | av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 0); | |
2ba45a60 DM |
2612 | ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt); |
2613 | if (!options) | |
2614 | av_dict_free(&thread_opt); | |
2615 | if (ret < 0) { | |
2616 | st->info->found_decoder = -st->codec->codec_id; | |
2617 | goto fail; | |
2618 | } | |
2619 | st->info->found_decoder = 1; | |
2620 | } else if (!st->info->found_decoder) | |
2621 | st->info->found_decoder = 1; | |
2622 | ||
2623 | if (st->info->found_decoder < 0) { | |
2624 | ret = -1; | |
2625 | goto fail; | |
2626 | } | |
2627 | ||
2628 | while ((pkt.size > 0 || (!pkt.data && got_picture)) && | |
2629 | ret >= 0 && | |
2630 | (!has_codec_parameters(st, NULL) || !has_decode_delay_been_guessed(st) || | |
2631 | (!st->codec_info_nb_frames && | |
2632 | st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) { | |
2633 | got_picture = 0; | |
2634 | switch (st->codec->codec_type) { | |
2635 | case AVMEDIA_TYPE_VIDEO: | |
2636 | ret = avcodec_decode_video2(st->codec, frame, | |
2637 | &got_picture, &pkt); | |
2638 | break; | |
2639 | case AVMEDIA_TYPE_AUDIO: | |
2640 | ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt); | |
2641 | break; | |
2642 | case AVMEDIA_TYPE_SUBTITLE: | |
2643 | ret = avcodec_decode_subtitle2(st->codec, &subtitle, | |
2644 | &got_picture, &pkt); | |
2645 | ret = pkt.size; | |
2646 | break; | |
2647 | default: | |
2648 | break; | |
2649 | } | |
2650 | if (ret >= 0) { | |
2651 | if (got_picture) | |
2652 | st->nb_decoded_frames++; | |
2653 | pkt.data += ret; | |
2654 | pkt.size -= ret; | |
2655 | ret = got_picture; | |
2656 | } | |
2657 | } | |
2658 | ||
2659 | if (!pkt.data && !got_picture) | |
2660 | ret = -1; | |
2661 | ||
2662 | fail: | |
2663 | av_frame_free(&frame); | |
2664 | return ret; | |
2665 | } | |
2666 | ||
2667 | unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id) | |
2668 | { | |
2669 | while (tags->id != AV_CODEC_ID_NONE) { | |
2670 | if (tags->id == id) | |
2671 | return tags->tag; | |
2672 | tags++; | |
2673 | } | |
2674 | return 0; | |
2675 | } | |
2676 | ||
2677 | enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag) | |
2678 | { | |
2679 | int i; | |
2680 | for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++) | |
2681 | if (tag == tags[i].tag) | |
2682 | return tags[i].id; | |
2683 | for (i = 0; tags[i].id != AV_CODEC_ID_NONE; i++) | |
2684 | if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag)) | |
2685 | return tags[i].id; | |
2686 | return AV_CODEC_ID_NONE; | |
2687 | } | |
2688 | ||
2689 | enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags) | |
2690 | { | |
2691 | if (flt) { | |
2692 | switch (bps) { | |
2693 | case 32: | |
2694 | return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE; | |
2695 | case 64: | |
2696 | return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE; | |
2697 | default: | |
2698 | return AV_CODEC_ID_NONE; | |
2699 | } | |
2700 | } else { | |
2701 | bps += 7; | |
2702 | bps >>= 3; | |
2703 | if (sflags & (1 << (bps - 1))) { | |
2704 | switch (bps) { | |
2705 | case 1: | |
2706 | return AV_CODEC_ID_PCM_S8; | |
2707 | case 2: | |
2708 | return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE; | |
2709 | case 3: | |
2710 | return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE; | |
2711 | case 4: | |
2712 | return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE; | |
2713 | default: | |
2714 | return AV_CODEC_ID_NONE; | |
2715 | } | |
2716 | } else { | |
2717 | switch (bps) { | |
2718 | case 1: | |
2719 | return AV_CODEC_ID_PCM_U8; | |
2720 | case 2: | |
2721 | return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE; | |
2722 | case 3: | |
2723 | return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE; | |
2724 | case 4: | |
2725 | return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE; | |
2726 | default: | |
2727 | return AV_CODEC_ID_NONE; | |
2728 | } | |
2729 | } | |
2730 | } | |
2731 | } | |
2732 | ||
2733 | unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id) | |
2734 | { | |
2735 | unsigned int tag; | |
2736 | if (!av_codec_get_tag2(tags, id, &tag)) | |
2737 | return 0; | |
2738 | return tag; | |
2739 | } | |
2740 | ||
2741 | int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id, | |
2742 | unsigned int *tag) | |
2743 | { | |
2744 | int i; | |
2745 | for (i = 0; tags && tags[i]; i++) { | |
2746 | const AVCodecTag *codec_tags = tags[i]; | |
2747 | while (codec_tags->id != AV_CODEC_ID_NONE) { | |
2748 | if (codec_tags->id == id) { | |
2749 | *tag = codec_tags->tag; | |
2750 | return 1; | |
2751 | } | |
2752 | codec_tags++; | |
2753 | } | |
2754 | } | |
2755 | return 0; | |
2756 | } | |
2757 | ||
2758 | enum AVCodecID av_codec_get_id(const AVCodecTag *const *tags, unsigned int tag) | |
2759 | { | |
2760 | int i; | |
2761 | for (i = 0; tags && tags[i]; i++) { | |
2762 | enum AVCodecID id = ff_codec_get_id(tags[i], tag); | |
2763 | if (id != AV_CODEC_ID_NONE) | |
2764 | return id; | |
2765 | } | |
2766 | return AV_CODEC_ID_NONE; | |
2767 | } | |
2768 | ||
2769 | static void compute_chapters_end(AVFormatContext *s) | |
2770 | { | |
2771 | unsigned int i, j; | |
2772 | int64_t max_time = s->duration + | |
2773 | ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time); | |
2774 | ||
2775 | for (i = 0; i < s->nb_chapters; i++) | |
2776 | if (s->chapters[i]->end == AV_NOPTS_VALUE) { | |
2777 | AVChapter *ch = s->chapters[i]; | |
2778 | int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, | |
2779 | ch->time_base) | |
2780 | : INT64_MAX; | |
2781 | ||
2782 | for (j = 0; j < s->nb_chapters; j++) { | |
2783 | AVChapter *ch1 = s->chapters[j]; | |
2784 | int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, | |
2785 | ch->time_base); | |
2786 | if (j != i && next_start > ch->start && next_start < end) | |
2787 | end = next_start; | |
2788 | } | |
2789 | ch->end = (end == INT64_MAX) ? ch->start : end; | |
2790 | } | |
2791 | } | |
2792 | ||
2793 | static int get_std_framerate(int i) | |
2794 | { | |
f6fa7814 | 2795 | if (i < 30*12) |
2ba45a60 | 2796 | return (i + 1) * 1001; |
f6fa7814 DM |
2797 | i -= 30*12; |
2798 | ||
2799 | if (i < 7) | |
2800 | return ((const int[]) { 40, 48, 50, 60, 80, 120, 240})[i] * 1001 * 12; | |
2801 | ||
2802 | i -= 7; | |
2803 | ||
2804 | return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 1000 * 12; | |
2ba45a60 DM |
2805 | } |
2806 | ||
2807 | /* Is the time base unreliable? | |
2808 | * This is a heuristic to balance between quick acceptance of the values in | |
2809 | * the headers vs. some extra checks. | |
2810 | * Old DivX and Xvid often have nonsense timebases like 1fps or 2fps. | |
2811 | * MPEG-2 commonly misuses field repeat flags to store different framerates. | |
2812 | * And there are "variable" fps files this needs to detect as well. */ | |
2813 | static int tb_unreliable(AVCodecContext *c) | |
2814 | { | |
2815 | if (c->time_base.den >= 101L * c->time_base.num || | |
2816 | c->time_base.den < 5L * c->time_base.num || | |
2817 | // c->codec_tag == AV_RL32("DIVX") || | |
2818 | // c->codec_tag == AV_RL32("XVID") || | |
2819 | c->codec_tag == AV_RL32("mp4v") || | |
2820 | c->codec_id == AV_CODEC_ID_MPEG2VIDEO || | |
2821 | c->codec_id == AV_CODEC_ID_GIF || | |
2822 | c->codec_id == AV_CODEC_ID_H264) | |
2823 | return 1; | |
2824 | return 0; | |
2825 | } | |
2826 | ||
2ba45a60 DM |
2827 | int ff_alloc_extradata(AVCodecContext *avctx, int size) |
2828 | { | |
2829 | int ret; | |
2830 | ||
2831 | if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) { | |
0e279ba6 | 2832 | avctx->extradata = NULL; |
2ba45a60 DM |
2833 | avctx->extradata_size = 0; |
2834 | return AVERROR(EINVAL); | |
2835 | } | |
2836 | avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); | |
2837 | if (avctx->extradata) { | |
2838 | memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); | |
2839 | avctx->extradata_size = size; | |
2840 | ret = 0; | |
2841 | } else { | |
2842 | avctx->extradata_size = 0; | |
2843 | ret = AVERROR(ENOMEM); | |
2844 | } | |
2845 | return ret; | |
2846 | } | |
2847 | ||
2848 | int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size) | |
2849 | { | |
2850 | int ret = ff_alloc_extradata(avctx, size); | |
2851 | if (ret < 0) | |
2852 | return ret; | |
2853 | ret = avio_read(pb, avctx->extradata, size); | |
2854 | if (ret != size) { | |
2855 | av_freep(&avctx->extradata); | |
2856 | avctx->extradata_size = 0; | |
2857 | av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size); | |
2858 | return ret < 0 ? ret : AVERROR_INVALIDDATA; | |
2859 | } | |
2860 | ||
2861 | return ret; | |
2862 | } | |
2863 | ||
2864 | int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts) | |
2865 | { | |
2866 | int i, j; | |
2867 | int64_t last = st->info->last_dts; | |
2868 | ||
2869 | if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last | |
2870 | && ts - (uint64_t)last < INT64_MAX) { | |
2871 | double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base); | |
2872 | int64_t duration = ts - last; | |
2873 | ||
2874 | if (!st->info->duration_error) | |
2875 | st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2); | |
2876 | if (!st->info->duration_error) | |
2877 | return AVERROR(ENOMEM); | |
2878 | ||
2879 | // if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) | |
2880 | // av_log(NULL, AV_LOG_ERROR, "%f\n", dts); | |
2881 | for (i = 0; i<MAX_STD_TIMEBASES; i++) { | |
2882 | if (st->info->duration_error[0][1][i] < 1e10) { | |
2883 | int framerate = get_std_framerate(i); | |
2884 | double sdts = dts*framerate/(1001*12); | |
2885 | for (j= 0; j<2; j++) { | |
2886 | int64_t ticks = llrint(sdts+j*0.5); | |
2887 | double error= sdts - ticks + j*0.5; | |
2888 | st->info->duration_error[j][0][i] += error; | |
2889 | st->info->duration_error[j][1][i] += error*error; | |
2890 | } | |
2891 | } | |
2892 | } | |
2893 | st->info->duration_count++; | |
2894 | st->info->rfps_duration_sum += duration; | |
2895 | ||
2896 | if (st->info->duration_count % 10 == 0) { | |
2897 | int n = st->info->duration_count; | |
2898 | for (i = 0; i<MAX_STD_TIMEBASES; i++) { | |
2899 | if (st->info->duration_error[0][1][i] < 1e10) { | |
2900 | double a0 = st->info->duration_error[0][0][i] / n; | |
2901 | double error0 = st->info->duration_error[0][1][i] / n - a0*a0; | |
2902 | double a1 = st->info->duration_error[1][0][i] / n; | |
2903 | double error1 = st->info->duration_error[1][1][i] / n - a1*a1; | |
2904 | if (error0 > 0.04 && error1 > 0.04) { | |
2905 | st->info->duration_error[0][1][i] = 2e10; | |
2906 | st->info->duration_error[1][1][i] = 2e10; | |
2907 | } | |
2908 | } | |
2909 | } | |
2910 | } | |
2911 | ||
2912 | // ignore the first 4 values, they might have some random jitter | |
2913 | if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last)) | |
2914 | st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration); | |
2915 | } | |
2916 | if (ts != AV_NOPTS_VALUE) | |
2917 | st->info->last_dts = ts; | |
2918 | ||
2919 | return 0; | |
2920 | } | |
2921 | ||
2922 | void ff_rfps_calculate(AVFormatContext *ic) | |
2923 | { | |
2924 | int i, j; | |
2925 | ||
2926 | for (i = 0; i < ic->nb_streams; i++) { | |
2927 | AVStream *st = ic->streams[i]; | |
2928 | ||
2929 | if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) | |
2930 | continue; | |
2931 | // the check for tb_unreliable() is not completely correct, since this is not about handling | |
2932 | // a unreliable/inexact time base, but a time base that is finer than necessary, as e.g. | |
2933 | // ipmovie.c produces. | |
2934 | if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num) | |
2935 | av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX); | |
2936 | if (st->info->duration_count>1 && !st->r_frame_rate.num | |
2937 | && tb_unreliable(st->codec)) { | |
2938 | int num = 0; | |
2939 | double best_error= 0.01; | |
2940 | AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base); | |
2941 | ||
2942 | for (j= 0; j<MAX_STD_TIMEBASES; j++) { | |
2943 | int k; | |
2944 | ||
2945 | if (st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j)) | |
2946 | continue; | |
2947 | if (!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j)) | |
2948 | continue; | |
2949 | ||
2950 | if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/get_std_framerate(j)) | |
2951 | continue; | |
2952 | ||
2953 | for (k= 0; k<2; k++) { | |
2954 | int n = st->info->duration_count; | |
2955 | double a= st->info->duration_error[k][0][j] / n; | |
2956 | double error= st->info->duration_error[k][1][j]/n - a*a; | |
2957 | ||
2958 | if (error < best_error && best_error> 0.000000001) { | |
2959 | best_error= error; | |
2960 | num = get_std_framerate(j); | |
2961 | } | |
2962 | if (error < 0.02) | |
2963 | av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error); | |
2964 | } | |
2965 | } | |
2966 | // do not increase frame rate by more than 1 % in order to match a standard rate. | |
2967 | if (num && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate))) | |
2968 | av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX); | |
2969 | } | |
2970 | if ( !st->avg_frame_rate.num | |
2971 | && st->r_frame_rate.num && st->info->rfps_duration_sum | |
2972 | && st->info->codec_info_duration <= 0 | |
2973 | && st->info->duration_count > 2 | |
2974 | && fabs(1.0 / (av_q2d(st->r_frame_rate) * av_q2d(st->time_base)) - st->info->rfps_duration_sum / (double)st->info->duration_count) <= 1.0 | |
2975 | ) { | |
2976 | av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n"); | |
2977 | st->avg_frame_rate = st->r_frame_rate; | |
2978 | } | |
2979 | ||
2980 | av_freep(&st->info->duration_error); | |
2981 | st->info->last_dts = AV_NOPTS_VALUE; | |
2982 | st->info->duration_count = 0; | |
2983 | st->info->rfps_duration_sum = 0; | |
2984 | } | |
2985 | } | |
2986 | ||
2987 | int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) | |
2988 | { | |
2989 | int i, count, ret = 0, j; | |
2990 | int64_t read_size; | |
2991 | AVStream *st; | |
2992 | AVPacket pkt1, *pkt; | |
2993 | int64_t old_offset = avio_tell(ic->pb); | |
2994 | // new streams might appear, no options for those | |
2995 | int orig_nb_streams = ic->nb_streams; | |
2996 | int flush_codecs; | |
2997 | int64_t max_analyze_duration = ic->max_analyze_duration2; | |
f6fa7814 | 2998 | int64_t max_stream_analyze_duration; |
2ba45a60 DM |
2999 | int64_t probesize = ic->probesize2; |
3000 | ||
3001 | if (!max_analyze_duration) | |
3002 | max_analyze_duration = ic->max_analyze_duration; | |
3003 | if (ic->probesize) | |
3004 | probesize = ic->probesize; | |
3005 | flush_codecs = probesize > 0; | |
3006 | ||
3007 | av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN); | |
3008 | ||
f6fa7814 | 3009 | max_stream_analyze_duration = max_analyze_duration; |
2ba45a60 | 3010 | if (!max_analyze_duration) { |
f6fa7814 DM |
3011 | max_stream_analyze_duration = |
3012 | max_analyze_duration = 5*AV_TIME_BASE; | |
3013 | if (!strcmp(ic->iformat->name, "flv")) | |
3014 | max_stream_analyze_duration = 30*AV_TIME_BASE; | |
2ba45a60 DM |
3015 | } |
3016 | ||
3017 | if (ic->pb) | |
3018 | av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n", | |
3019 | avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count); | |
3020 | ||
3021 | for (i = 0; i < ic->nb_streams; i++) { | |
3022 | const AVCodec *codec; | |
3023 | AVDictionary *thread_opt = NULL; | |
3024 | st = ic->streams[i]; | |
3025 | ||
3026 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || | |
3027 | st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) { | |
3028 | /* if (!st->time_base.num) | |
3029 | st->time_base = */ | |
3030 | if (!st->codec->time_base.num) | |
3031 | st->codec->time_base = st->time_base; | |
3032 | } | |
3033 | // only for the split stuff | |
3034 | if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) { | |
3035 | st->parser = av_parser_init(st->codec->codec_id); | |
3036 | if (st->parser) { | |
3037 | if (st->need_parsing == AVSTREAM_PARSE_HEADERS) { | |
3038 | st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; | |
3039 | } else if (st->need_parsing == AVSTREAM_PARSE_FULL_RAW) { | |
3040 | st->parser->flags |= PARSER_FLAG_USE_CODEC_TS; | |
3041 | } | |
3042 | } else if (st->need_parsing) { | |
3043 | av_log(ic, AV_LOG_VERBOSE, "parser not found for codec " | |
3044 | "%s, packets or times may be invalid.\n", | |
3045 | avcodec_get_name(st->codec->codec_id)); | |
3046 | } | |
3047 | } | |
3048 | codec = find_decoder(ic, st, st->codec->codec_id); | |
3049 | ||
3050 | /* Force thread count to 1 since the H.264 decoder will not extract | |
3051 | * SPS and PPS to extradata during multi-threaded decoding. */ | |
3052 | av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0); | |
3053 | ||
f6fa7814 DM |
3054 | if (ic->codec_whitelist) |
3055 | av_dict_set(options ? &options[i] : &thread_opt, "codec_whitelist", ic->codec_whitelist, 0); | |
3056 | ||
2ba45a60 DM |
3057 | /* Ensure that subtitle_header is properly set. */ |
3058 | if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE | |
3059 | && codec && !st->codec->codec) { | |
3060 | if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0) | |
3061 | av_log(ic, AV_LOG_WARNING, | |
3062 | "Failed to open codec in av_find_stream_info\n"); | |
3063 | } | |
3064 | ||
3065 | // Try to just open decoders, in case this is enough to get parameters. | |
3066 | if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) { | |
3067 | if (codec && !st->codec->codec) | |
3068 | if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0) | |
3069 | av_log(ic, AV_LOG_WARNING, | |
3070 | "Failed to open codec in av_find_stream_info\n"); | |
3071 | } | |
3072 | if (!options) | |
3073 | av_dict_free(&thread_opt); | |
3074 | } | |
3075 | ||
3076 | for (i = 0; i < ic->nb_streams; i++) { | |
3077 | #if FF_API_R_FRAME_RATE | |
3078 | ic->streams[i]->info->last_dts = AV_NOPTS_VALUE; | |
3079 | #endif | |
3080 | ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE; | |
3081 | ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE; | |
3082 | } | |
3083 | ||
3084 | count = 0; | |
3085 | read_size = 0; | |
3086 | for (;;) { | |
f6fa7814 | 3087 | int analyzed_all_streams; |
2ba45a60 DM |
3088 | if (ff_check_interrupt(&ic->interrupt_callback)) { |
3089 | ret = AVERROR_EXIT; | |
3090 | av_log(ic, AV_LOG_DEBUG, "interrupted\n"); | |
3091 | break; | |
3092 | } | |
3093 | ||
3094 | /* check if one codec still needs to be handled */ | |
3095 | for (i = 0; i < ic->nb_streams; i++) { | |
3096 | int fps_analyze_framecount = 20; | |
3097 | ||
3098 | st = ic->streams[i]; | |
3099 | if (!has_codec_parameters(st, NULL)) | |
3100 | break; | |
3101 | /* If the timebase is coarse (like the usual millisecond precision | |
3102 | * of mkv), we need to analyze more frames to reliably arrive at | |
3103 | * the correct fps. */ | |
3104 | if (av_q2d(st->time_base) > 0.0005) | |
3105 | fps_analyze_framecount *= 2; | |
3106 | if (!tb_unreliable(st->codec)) | |
3107 | fps_analyze_framecount = 0; | |
3108 | if (ic->fps_probe_size >= 0) | |
3109 | fps_analyze_framecount = ic->fps_probe_size; | |
3110 | if (st->disposition & AV_DISPOSITION_ATTACHED_PIC) | |
3111 | fps_analyze_framecount = 0; | |
3112 | /* variable fps and no guess at the real fps */ | |
3113 | if (!(st->r_frame_rate.num && st->avg_frame_rate.num) && | |
3114 | st->info->duration_count < fps_analyze_framecount && | |
3115 | st->codec->codec_type == AVMEDIA_TYPE_VIDEO) | |
3116 | break; | |
3117 | if (st->parser && st->parser->parser->split && | |
3118 | !st->codec->extradata) | |
3119 | break; | |
3120 | if (st->first_dts == AV_NOPTS_VALUE && | |
3121 | !(ic->iformat->flags & AVFMT_NOTIMESTAMPS) && | |
3122 | st->codec_info_nb_frames < ic->max_ts_probe && | |
3123 | (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || | |
3124 | st->codec->codec_type == AVMEDIA_TYPE_AUDIO)) | |
3125 | break; | |
3126 | } | |
f6fa7814 | 3127 | analyzed_all_streams = 0; |
2ba45a60 | 3128 | if (i == ic->nb_streams) { |
f6fa7814 | 3129 | analyzed_all_streams = 1; |
2ba45a60 DM |
3130 | /* NOTE: If the format has no header, then we need to read some |
3131 | * packets to get most of the streams, so we cannot stop here. */ | |
3132 | if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) { | |
3133 | /* If we found the info for all the codecs, we can stop. */ | |
3134 | ret = count; | |
3135 | av_log(ic, AV_LOG_DEBUG, "All info found\n"); | |
3136 | flush_codecs = 0; | |
3137 | break; | |
3138 | } | |
3139 | } | |
3140 | /* We did not get all the codec info, but we read too much data. */ | |
3141 | if (read_size >= probesize) { | |
3142 | ret = count; | |
3143 | av_log(ic, AV_LOG_DEBUG, | |
3144 | "Probe buffer size limit of %"PRId64" bytes reached\n", probesize); | |
3145 | for (i = 0; i < ic->nb_streams; i++) | |
3146 | if (!ic->streams[i]->r_frame_rate.num && | |
3147 | ic->streams[i]->info->duration_count <= 1 && | |
3148 | ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO && | |
3149 | strcmp(ic->iformat->name, "image2")) | |
3150 | av_log(ic, AV_LOG_WARNING, | |
3151 | "Stream #%d: not enough frames to estimate rate; " | |
3152 | "consider increasing probesize\n", i); | |
3153 | break; | |
3154 | } | |
3155 | ||
3156 | /* NOTE: A new stream can be added there if no header in file | |
3157 | * (AVFMTCTX_NOHEADER). */ | |
3158 | ret = read_frame_internal(ic, &pkt1); | |
3159 | if (ret == AVERROR(EAGAIN)) | |
3160 | continue; | |
3161 | ||
3162 | if (ret < 0) { | |
3163 | /* EOF or error*/ | |
3164 | break; | |
3165 | } | |
3166 | ||
3167 | if (ic->flags & AVFMT_FLAG_NOBUFFER) | |
3168 | free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end); | |
3169 | { | |
3170 | pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1, | |
3171 | &ic->packet_buffer_end); | |
3172 | if (!pkt) { | |
3173 | ret = AVERROR(ENOMEM); | |
3174 | goto find_stream_info_err; | |
3175 | } | |
3176 | if ((ret = av_dup_packet(pkt)) < 0) | |
3177 | goto find_stream_info_err; | |
3178 | } | |
3179 | ||
3180 | st = ic->streams[pkt->stream_index]; | |
3181 | if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) | |
3182 | read_size += pkt->size; | |
3183 | ||
3184 | if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) { | |
3185 | /* check for non-increasing dts */ | |
3186 | if (st->info->fps_last_dts != AV_NOPTS_VALUE && | |
3187 | st->info->fps_last_dts >= pkt->dts) { | |
3188 | av_log(ic, AV_LOG_DEBUG, | |
3189 | "Non-increasing DTS in stream %d: packet %d with DTS " | |
3190 | "%"PRId64", packet %d with DTS %"PRId64"\n", | |
3191 | st->index, st->info->fps_last_dts_idx, | |
3192 | st->info->fps_last_dts, st->codec_info_nb_frames, | |
3193 | pkt->dts); | |
3194 | st->info->fps_first_dts = | |
3195 | st->info->fps_last_dts = AV_NOPTS_VALUE; | |
3196 | } | |
3197 | /* Check for a discontinuity in dts. If the difference in dts | |
3198 | * is more than 1000 times the average packet duration in the | |
3199 | * sequence, we treat it as a discontinuity. */ | |
3200 | if (st->info->fps_last_dts != AV_NOPTS_VALUE && | |
3201 | st->info->fps_last_dts_idx > st->info->fps_first_dts_idx && | |
3202 | (pkt->dts - st->info->fps_last_dts) / 1000 > | |
3203 | (st->info->fps_last_dts - st->info->fps_first_dts) / | |
3204 | (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) { | |
3205 | av_log(ic, AV_LOG_WARNING, | |
3206 | "DTS discontinuity in stream %d: packet %d with DTS " | |
3207 | "%"PRId64", packet %d with DTS %"PRId64"\n", | |
3208 | st->index, st->info->fps_last_dts_idx, | |
3209 | st->info->fps_last_dts, st->codec_info_nb_frames, | |
3210 | pkt->dts); | |
3211 | st->info->fps_first_dts = | |
3212 | st->info->fps_last_dts = AV_NOPTS_VALUE; | |
3213 | } | |
3214 | ||
3215 | /* update stored dts values */ | |
3216 | if (st->info->fps_first_dts == AV_NOPTS_VALUE) { | |
3217 | st->info->fps_first_dts = pkt->dts; | |
3218 | st->info->fps_first_dts_idx = st->codec_info_nb_frames; | |
3219 | } | |
3220 | st->info->fps_last_dts = pkt->dts; | |
3221 | st->info->fps_last_dts_idx = st->codec_info_nb_frames; | |
3222 | } | |
3223 | if (st->codec_info_nb_frames>1) { | |
3224 | int64_t t = 0; | |
3225 | ||
3226 | if (st->time_base.den > 0) | |
3227 | t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q); | |
3228 | if (st->avg_frame_rate.num > 0) | |
3229 | t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q)); | |
3230 | ||
3231 | if ( t == 0 | |
3232 | && st->codec_info_nb_frames>30 | |
3233 | && st->info->fps_first_dts != AV_NOPTS_VALUE | |
3234 | && st->info->fps_last_dts != AV_NOPTS_VALUE) | |
3235 | t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q)); | |
3236 | ||
f6fa7814 | 3237 | if (t >= (analyzed_all_streams ? max_analyze_duration : max_stream_analyze_duration)) { |
2ba45a60 DM |
3238 | av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds\n", |
3239 | max_analyze_duration, | |
3240 | t); | |
f6fa7814 DM |
3241 | if (ic->flags & AVFMT_FLAG_NOBUFFER) |
3242 | av_packet_unref(pkt); | |
2ba45a60 DM |
3243 | break; |
3244 | } | |
3245 | if (pkt->duration) { | |
3246 | st->info->codec_info_duration += pkt->duration; | |
3247 | st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2; | |
3248 | } | |
3249 | } | |
3250 | #if FF_API_R_FRAME_RATE | |
3251 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) | |
3252 | ff_rfps_add_frame(ic, st, pkt->dts); | |
3253 | #endif | |
3254 | if (st->parser && st->parser->parser->split && !st->codec->extradata) { | |
3255 | int i = st->parser->parser->split(st->codec, pkt->data, pkt->size); | |
3256 | if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) { | |
3257 | if (ff_alloc_extradata(st->codec, i)) | |
3258 | return AVERROR(ENOMEM); | |
3259 | memcpy(st->codec->extradata, pkt->data, | |
3260 | st->codec->extradata_size); | |
3261 | } | |
3262 | } | |
3263 | ||
3264 | /* If still no information, we try to open the codec and to | |
3265 | * decompress the frame. We try to avoid that in most cases as | |
3266 | * it takes longer and uses more memory. For MPEG-4, we need to | |
3267 | * decompress for QuickTime. | |
3268 | * | |
3269 | * If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at | |
3270 | * least one frame of codec data, this makes sure the codec initializes | |
3271 | * the channel configuration and does not only trust the values from | |
3272 | * the container. */ | |
3273 | try_decode_frame(ic, st, pkt, | |
3274 | (options && i < orig_nb_streams) ? &options[i] : NULL); | |
3275 | ||
f6fa7814 DM |
3276 | if (ic->flags & AVFMT_FLAG_NOBUFFER) |
3277 | av_packet_unref(pkt); | |
3278 | ||
2ba45a60 DM |
3279 | st->codec_info_nb_frames++; |
3280 | count++; | |
3281 | } | |
3282 | ||
3283 | if (flush_codecs) { | |
3284 | AVPacket empty_pkt = { 0 }; | |
3285 | int err = 0; | |
3286 | av_init_packet(&empty_pkt); | |
3287 | ||
3288 | for (i = 0; i < ic->nb_streams; i++) { | |
3289 | ||
3290 | st = ic->streams[i]; | |
3291 | ||
3292 | /* flush the decoders */ | |
3293 | if (st->info->found_decoder == 1) { | |
3294 | do { | |
3295 | err = try_decode_frame(ic, st, &empty_pkt, | |
3296 | (options && i < orig_nb_streams) | |
3297 | ? &options[i] : NULL); | |
3298 | } while (err > 0 && !has_codec_parameters(st, NULL)); | |
3299 | ||
3300 | if (err < 0) { | |
3301 | av_log(ic, AV_LOG_INFO, | |
3302 | "decoding for stream %d failed\n", st->index); | |
3303 | } | |
3304 | } | |
3305 | } | |
3306 | } | |
2ba45a60 DM |
3307 | |
3308 | // close codecs which were opened in try_decode_frame() | |
3309 | for (i = 0; i < ic->nb_streams; i++) { | |
3310 | st = ic->streams[i]; | |
3311 | avcodec_close(st->codec); | |
3312 | } | |
3313 | ||
3314 | ff_rfps_calculate(ic); | |
3315 | ||
3316 | for (i = 0; i < ic->nb_streams; i++) { | |
3317 | st = ic->streams[i]; | |
3318 | if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { | |
3319 | if (st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample) { | |
3320 | uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); | |
3321 | if (avpriv_find_pix_fmt(avpriv_get_raw_pix_fmt_tags(), tag) == st->codec->pix_fmt) | |
3322 | st->codec->codec_tag= tag; | |
3323 | } | |
3324 | ||
3325 | /* estimate average framerate if not set by demuxer */ | |
3326 | if (st->info->codec_info_duration_fields && | |
3327 | !st->avg_frame_rate.num && | |
3328 | st->info->codec_info_duration) { | |
3329 | int best_fps = 0; | |
3330 | double best_error = 0.01; | |
3331 | ||
3332 | if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2|| | |
3333 | st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den || | |
3334 | st->info->codec_info_duration < 0) | |
3335 | continue; | |
3336 | av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, | |
3337 | st->info->codec_info_duration_fields * (int64_t) st->time_base.den, | |
3338 | st->info->codec_info_duration * 2 * (int64_t) st->time_base.num, 60000); | |
3339 | ||
3340 | /* Round guessed framerate to a "standard" framerate if it's | |
3341 | * within 1% of the original estimate. */ | |
3342 | for (j = 0; j < MAX_STD_TIMEBASES; j++) { | |
3343 | AVRational std_fps = { get_std_framerate(j), 12 * 1001 }; | |
3344 | double error = fabs(av_q2d(st->avg_frame_rate) / | |
3345 | av_q2d(std_fps) - 1); | |
3346 | ||
3347 | if (error < best_error) { | |
3348 | best_error = error; | |
3349 | best_fps = std_fps.num; | |
3350 | } | |
3351 | } | |
3352 | if (best_fps) | |
3353 | av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, | |
3354 | best_fps, 12 * 1001, INT_MAX); | |
3355 | } | |
3356 | ||
3357 | if (!st->r_frame_rate.num) { | |
3358 | if ( st->codec->time_base.den * (int64_t) st->time_base.num | |
3359 | <= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t) st->time_base.den) { | |
3360 | st->r_frame_rate.num = st->codec->time_base.den; | |
3361 | st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame; | |
3362 | } else { | |
3363 | st->r_frame_rate.num = st->time_base.den; | |
3364 | st->r_frame_rate.den = st->time_base.num; | |
3365 | } | |
3366 | } | |
f6fa7814 DM |
3367 | if (st->display_aspect_ratio.num && st->display_aspect_ratio.den) { |
3368 | AVRational hw_ratio = { st->codec->height, st->codec->width }; | |
3369 | st->sample_aspect_ratio = av_mul_q(st->display_aspect_ratio, | |
3370 | hw_ratio); | |
3371 | } | |
2ba45a60 DM |
3372 | } else if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
3373 | if (!st->codec->bits_per_coded_sample) | |
3374 | st->codec->bits_per_coded_sample = | |
3375 | av_get_bits_per_sample(st->codec->codec_id); | |
3376 | // set stream disposition based on audio service type | |
3377 | switch (st->codec->audio_service_type) { | |
3378 | case AV_AUDIO_SERVICE_TYPE_EFFECTS: | |
3379 | st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; | |
3380 | break; | |
3381 | case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED: | |
3382 | st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; | |
3383 | break; | |
3384 | case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED: | |
3385 | st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; | |
3386 | break; | |
3387 | case AV_AUDIO_SERVICE_TYPE_COMMENTARY: | |
3388 | st->disposition = AV_DISPOSITION_COMMENT; | |
3389 | break; | |
3390 | case AV_AUDIO_SERVICE_TYPE_KARAOKE: | |
3391 | st->disposition = AV_DISPOSITION_KARAOKE; | |
3392 | break; | |
3393 | } | |
3394 | } | |
3395 | } | |
3396 | ||
3397 | if (probesize) | |
3398 | estimate_timings(ic, old_offset); | |
3399 | ||
f6fa7814 DM |
3400 | av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN); |
3401 | ||
2ba45a60 DM |
3402 | if (ret >= 0 && ic->nb_streams) |
3403 | /* We could not have all the codec parameters before EOF. */ | |
3404 | ret = -1; | |
3405 | for (i = 0; i < ic->nb_streams; i++) { | |
3406 | const char *errmsg; | |
3407 | st = ic->streams[i]; | |
3408 | if (!has_codec_parameters(st, &errmsg)) { | |
3409 | char buf[256]; | |
3410 | avcodec_string(buf, sizeof(buf), st->codec, 0); | |
3411 | av_log(ic, AV_LOG_WARNING, | |
3412 | "Could not find codec parameters for stream %d (%s): %s\n" | |
3413 | "Consider increasing the value for the 'analyzeduration' and 'probesize' options\n", | |
3414 | i, buf, errmsg); | |
3415 | } else { | |
3416 | ret = 0; | |
3417 | } | |
3418 | } | |
3419 | ||
3420 | compute_chapters_end(ic); | |
3421 | ||
3422 | find_stream_info_err: | |
3423 | for (i = 0; i < ic->nb_streams; i++) { | |
3424 | st = ic->streams[i]; | |
3425 | if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO) | |
3426 | ic->streams[i]->codec->thread_count = 0; | |
3427 | if (st->info) | |
3428 | av_freep(&st->info->duration_error); | |
3429 | av_freep(&ic->streams[i]->info); | |
3430 | } | |
3431 | if (ic->pb) | |
3432 | av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n", | |
3433 | avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count); | |
3434 | return ret; | |
3435 | } | |
3436 | ||
3437 | AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s) | |
3438 | { | |
3439 | int i, j; | |
3440 | ||
3441 | for (i = 0; i < ic->nb_programs; i++) { | |
3442 | if (ic->programs[i] == last) { | |
3443 | last = NULL; | |
3444 | } else { | |
3445 | if (!last) | |
3446 | for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++) | |
3447 | if (ic->programs[i]->stream_index[j] == s) | |
3448 | return ic->programs[i]; | |
3449 | } | |
3450 | } | |
3451 | return NULL; | |
3452 | } | |
3453 | ||
3454 | int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type, | |
3455 | int wanted_stream_nb, int related_stream, | |
3456 | AVCodec **decoder_ret, int flags) | |
3457 | { | |
3458 | int i, nb_streams = ic->nb_streams; | |
3459 | int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe; | |
3460 | unsigned *program = NULL; | |
3461 | const AVCodec *decoder = NULL, *best_decoder = NULL; | |
3462 | ||
3463 | if (related_stream >= 0 && wanted_stream_nb < 0) { | |
3464 | AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream); | |
3465 | if (p) { | |
3466 | program = p->stream_index; | |
3467 | nb_streams = p->nb_stream_indexes; | |
3468 | } | |
3469 | } | |
3470 | for (i = 0; i < nb_streams; i++) { | |
3471 | int real_stream_index = program ? program[i] : i; | |
3472 | AVStream *st = ic->streams[real_stream_index]; | |
3473 | AVCodecContext *avctx = st->codec; | |
3474 | if (avctx->codec_type != type) | |
3475 | continue; | |
3476 | if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb) | |
3477 | continue; | |
3478 | if (wanted_stream_nb != real_stream_index && | |
3479 | st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED | | |
3480 | AV_DISPOSITION_VISUAL_IMPAIRED)) | |
3481 | continue; | |
3482 | if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels) | |
3483 | continue; | |
3484 | if (decoder_ret) { | |
3485 | decoder = find_decoder(ic, st, st->codec->codec_id); | |
3486 | if (!decoder) { | |
3487 | if (ret < 0) | |
3488 | ret = AVERROR_DECODER_NOT_FOUND; | |
3489 | continue; | |
3490 | } | |
3491 | } | |
3492 | count = st->codec_info_nb_frames; | |
3493 | bitrate = avctx->bit_rate; | |
3494 | if (!bitrate) | |
3495 | bitrate = avctx->rc_max_rate; | |
3496 | multiframe = FFMIN(5, count); | |
3497 | if ((best_multiframe > multiframe) || | |
3498 | (best_multiframe == multiframe && best_bitrate > bitrate) || | |
3499 | (best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count)) | |
3500 | continue; | |
3501 | best_count = count; | |
3502 | best_bitrate = bitrate; | |
3503 | best_multiframe = multiframe; | |
3504 | ret = real_stream_index; | |
3505 | best_decoder = decoder; | |
3506 | if (program && i == nb_streams - 1 && ret < 0) { | |
3507 | program = NULL; | |
3508 | nb_streams = ic->nb_streams; | |
3509 | /* no related stream found, try again with everything */ | |
3510 | i = 0; | |
3511 | } | |
3512 | } | |
3513 | if (decoder_ret) | |
3514 | *decoder_ret = (AVCodec*)best_decoder; | |
3515 | return ret; | |
3516 | } | |
3517 | ||
3518 | /*******************************************************/ | |
3519 | ||
3520 | int av_read_play(AVFormatContext *s) | |
3521 | { | |
3522 | if (s->iformat->read_play) | |
3523 | return s->iformat->read_play(s); | |
3524 | if (s->pb) | |
3525 | return avio_pause(s->pb, 0); | |
3526 | return AVERROR(ENOSYS); | |
3527 | } | |
3528 | ||
3529 | int av_read_pause(AVFormatContext *s) | |
3530 | { | |
3531 | if (s->iformat->read_pause) | |
3532 | return s->iformat->read_pause(s); | |
3533 | if (s->pb) | |
3534 | return avio_pause(s->pb, 1); | |
3535 | return AVERROR(ENOSYS); | |
3536 | } | |
3537 | ||
3538 | void ff_free_stream(AVFormatContext *s, AVStream *st) { | |
3539 | int j; | |
3540 | av_assert0(s->nb_streams>0); | |
3541 | av_assert0(s->streams[ s->nb_streams - 1 ] == st); | |
3542 | ||
3543 | for (j = 0; j < st->nb_side_data; j++) | |
3544 | av_freep(&st->side_data[j].data); | |
3545 | av_freep(&st->side_data); | |
3546 | st->nb_side_data = 0; | |
3547 | ||
3548 | if (st->parser) { | |
3549 | av_parser_close(st->parser); | |
3550 | } | |
3551 | if (st->attached_pic.data) | |
3552 | av_free_packet(&st->attached_pic); | |
3553 | av_dict_free(&st->metadata); | |
3554 | av_freep(&st->probe_data.buf); | |
3555 | av_freep(&st->index_entries); | |
3556 | av_freep(&st->codec->extradata); | |
3557 | av_freep(&st->codec->subtitle_header); | |
3558 | av_freep(&st->codec); | |
3559 | av_freep(&st->priv_data); | |
3560 | if (st->info) | |
3561 | av_freep(&st->info->duration_error); | |
3562 | av_freep(&st->info); | |
f6fa7814 | 3563 | av_freep(&st->recommended_encoder_configuration); |
2ba45a60 DM |
3564 | av_freep(&s->streams[ --s->nb_streams ]); |
3565 | } | |
3566 | ||
3567 | void avformat_free_context(AVFormatContext *s) | |
3568 | { | |
3569 | int i; | |
3570 | ||
3571 | if (!s) | |
3572 | return; | |
3573 | ||
3574 | av_opt_free(s); | |
3575 | if (s->iformat && s->iformat->priv_class && s->priv_data) | |
3576 | av_opt_free(s->priv_data); | |
3577 | if (s->oformat && s->oformat->priv_class && s->priv_data) | |
3578 | av_opt_free(s->priv_data); | |
3579 | ||
3580 | for (i = s->nb_streams - 1; i >= 0; i--) { | |
3581 | ff_free_stream(s, s->streams[i]); | |
3582 | } | |
3583 | for (i = s->nb_programs - 1; i >= 0; i--) { | |
3584 | av_dict_free(&s->programs[i]->metadata); | |
3585 | av_freep(&s->programs[i]->stream_index); | |
3586 | av_freep(&s->programs[i]); | |
3587 | } | |
3588 | av_freep(&s->programs); | |
3589 | av_freep(&s->priv_data); | |
3590 | while (s->nb_chapters--) { | |
3591 | av_dict_free(&s->chapters[s->nb_chapters]->metadata); | |
3592 | av_freep(&s->chapters[s->nb_chapters]); | |
3593 | } | |
3594 | av_freep(&s->chapters); | |
3595 | av_dict_free(&s->metadata); | |
3596 | av_freep(&s->streams); | |
3597 | av_freep(&s->internal); | |
3598 | flush_packet_queue(s); | |
3599 | av_free(s); | |
3600 | } | |
3601 | ||
2ba45a60 DM |
3602 | void avformat_close_input(AVFormatContext **ps) |
3603 | { | |
3604 | AVFormatContext *s; | |
3605 | AVIOContext *pb; | |
3606 | ||
3607 | if (!ps || !*ps) | |
3608 | return; | |
3609 | ||
3610 | s = *ps; | |
3611 | pb = s->pb; | |
3612 | ||
3613 | if ((s->iformat && strcmp(s->iformat->name, "image2") && s->iformat->flags & AVFMT_NOFILE) || | |
3614 | (s->flags & AVFMT_FLAG_CUSTOM_IO)) | |
3615 | pb = NULL; | |
3616 | ||
3617 | flush_packet_queue(s); | |
3618 | ||
3619 | if (s->iformat) | |
3620 | if (s->iformat->read_close) | |
3621 | s->iformat->read_close(s); | |
3622 | ||
3623 | avformat_free_context(s); | |
3624 | ||
3625 | *ps = NULL; | |
3626 | ||
3627 | avio_close(pb); | |
3628 | } | |
3629 | ||
2ba45a60 DM |
3630 | AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c) |
3631 | { | |
3632 | AVStream *st; | |
3633 | int i; | |
3634 | AVStream **streams; | |
3635 | ||
3636 | if (s->nb_streams >= INT_MAX/sizeof(*streams)) | |
3637 | return NULL; | |
3638 | streams = av_realloc_array(s->streams, s->nb_streams + 1, sizeof(*streams)); | |
3639 | if (!streams) | |
3640 | return NULL; | |
3641 | s->streams = streams; | |
3642 | ||
3643 | st = av_mallocz(sizeof(AVStream)); | |
3644 | if (!st) | |
3645 | return NULL; | |
3646 | if (!(st->info = av_mallocz(sizeof(*st->info)))) { | |
3647 | av_free(st); | |
3648 | return NULL; | |
3649 | } | |
3650 | st->info->last_dts = AV_NOPTS_VALUE; | |
3651 | ||
3652 | st->codec = avcodec_alloc_context3(c); | |
3653 | if (s->iformat) { | |
3654 | /* no default bitrate if decoding */ | |
3655 | st->codec->bit_rate = 0; | |
3656 | ||
3657 | /* default pts setting is MPEG-like */ | |
3658 | avpriv_set_pts_info(st, 33, 1, 90000); | |
3659 | } | |
3660 | ||
3661 | st->index = s->nb_streams; | |
3662 | st->start_time = AV_NOPTS_VALUE; | |
3663 | st->duration = AV_NOPTS_VALUE; | |
3664 | /* we set the current DTS to 0 so that formats without any timestamps | |
3665 | * but durations get some timestamps, formats with some unknown | |
3666 | * timestamps have their first few packets buffered and the | |
3667 | * timestamps corrected before they are returned to the user */ | |
3668 | st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0; | |
3669 | st->first_dts = AV_NOPTS_VALUE; | |
3670 | st->probe_packets = MAX_PROBE_PACKETS; | |
3671 | st->pts_wrap_reference = AV_NOPTS_VALUE; | |
3672 | st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE; | |
3673 | ||
3674 | st->last_IP_pts = AV_NOPTS_VALUE; | |
3675 | st->last_dts_for_order_check = AV_NOPTS_VALUE; | |
3676 | for (i = 0; i < MAX_REORDER_DELAY + 1; i++) | |
3677 | st->pts_buffer[i] = AV_NOPTS_VALUE; | |
3678 | ||
3679 | st->sample_aspect_ratio = (AVRational) { 0, 1 }; | |
3680 | ||
3681 | #if FF_API_R_FRAME_RATE | |
3682 | st->info->last_dts = AV_NOPTS_VALUE; | |
3683 | #endif | |
3684 | st->info->fps_first_dts = AV_NOPTS_VALUE; | |
3685 | st->info->fps_last_dts = AV_NOPTS_VALUE; | |
3686 | ||
3687 | st->inject_global_side_data = s->internal->inject_global_side_data; | |
3688 | ||
3689 | s->streams[s->nb_streams++] = st; | |
3690 | return st; | |
3691 | } | |
3692 | ||
3693 | AVProgram *av_new_program(AVFormatContext *ac, int id) | |
3694 | { | |
3695 | AVProgram *program = NULL; | |
3696 | int i; | |
3697 | ||
3698 | av_dlog(ac, "new_program: id=0x%04x\n", id); | |
3699 | ||
3700 | for (i = 0; i < ac->nb_programs; i++) | |
3701 | if (ac->programs[i]->id == id) | |
3702 | program = ac->programs[i]; | |
3703 | ||
3704 | if (!program) { | |
3705 | program = av_mallocz(sizeof(AVProgram)); | |
3706 | if (!program) | |
3707 | return NULL; | |
3708 | dynarray_add(&ac->programs, &ac->nb_programs, program); | |
3709 | program->discard = AVDISCARD_NONE; | |
3710 | } | |
3711 | program->id = id; | |
3712 | program->pts_wrap_reference = AV_NOPTS_VALUE; | |
3713 | program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE; | |
3714 | ||
3715 | program->start_time = | |
3716 | program->end_time = AV_NOPTS_VALUE; | |
3717 | ||
3718 | return program; | |
3719 | } | |
3720 | ||
3721 | AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, | |
3722 | int64_t start, int64_t end, const char *title) | |
3723 | { | |
3724 | AVChapter *chapter = NULL; | |
3725 | int i; | |
3726 | ||
3727 | if (end != AV_NOPTS_VALUE && start > end) { | |
3728 | av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start); | |
3729 | return NULL; | |
3730 | } | |
3731 | ||
3732 | for (i = 0; i < s->nb_chapters; i++) | |
3733 | if (s->chapters[i]->id == id) | |
3734 | chapter = s->chapters[i]; | |
3735 | ||
3736 | if (!chapter) { | |
3737 | chapter = av_mallocz(sizeof(AVChapter)); | |
3738 | if (!chapter) | |
3739 | return NULL; | |
3740 | dynarray_add(&s->chapters, &s->nb_chapters, chapter); | |
3741 | } | |
3742 | av_dict_set(&chapter->metadata, "title", title, 0); | |
3743 | chapter->id = id; | |
3744 | chapter->time_base = time_base; | |
3745 | chapter->start = start; | |
3746 | chapter->end = end; | |
3747 | ||
3748 | return chapter; | |
3749 | } | |
3750 | ||
3751 | void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned idx) | |
3752 | { | |
3753 | int i, j; | |
3754 | AVProgram *program = NULL; | |
3755 | void *tmp; | |
3756 | ||
3757 | if (idx >= ac->nb_streams) { | |
3758 | av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx); | |
3759 | return; | |
3760 | } | |
3761 | ||
3762 | for (i = 0; i < ac->nb_programs; i++) { | |
3763 | if (ac->programs[i]->id != progid) | |
3764 | continue; | |
3765 | program = ac->programs[i]; | |
3766 | for (j = 0; j < program->nb_stream_indexes; j++) | |
3767 | if (program->stream_index[j] == idx) | |
3768 | return; | |
3769 | ||
3770 | tmp = av_realloc_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int)); | |
3771 | if (!tmp) | |
3772 | return; | |
3773 | program->stream_index = tmp; | |
3774 | program->stream_index[program->nb_stream_indexes++] = idx; | |
3775 | return; | |
3776 | } | |
3777 | } | |
3778 | ||
3779 | uint64_t ff_ntp_time(void) | |
3780 | { | |
3781 | return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US; | |
3782 | } | |
3783 | ||
3784 | int av_get_frame_filename(char *buf, int buf_size, const char *path, int number) | |
3785 | { | |
3786 | const char *p; | |
3787 | char *q, buf1[20], c; | |
3788 | int nd, len, percentd_found; | |
3789 | ||
3790 | q = buf; | |
3791 | p = path; | |
3792 | percentd_found = 0; | |
3793 | for (;;) { | |
3794 | c = *p++; | |
3795 | if (c == '\0') | |
3796 | break; | |
3797 | if (c == '%') { | |
3798 | do { | |
3799 | nd = 0; | |
3800 | while (av_isdigit(*p)) | |
3801 | nd = nd * 10 + *p++ - '0'; | |
3802 | c = *p++; | |
3803 | } while (av_isdigit(c)); | |
3804 | ||
3805 | switch (c) { | |
3806 | case '%': | |
3807 | goto addchar; | |
3808 | case 'd': | |
3809 | if (percentd_found) | |
3810 | goto fail; | |
3811 | percentd_found = 1; | |
3812 | snprintf(buf1, sizeof(buf1), "%0*d", nd, number); | |
3813 | len = strlen(buf1); | |
3814 | if ((q - buf + len) > buf_size - 1) | |
3815 | goto fail; | |
3816 | memcpy(q, buf1, len); | |
3817 | q += len; | |
3818 | break; | |
3819 | default: | |
3820 | goto fail; | |
3821 | } | |
3822 | } else { | |
3823 | addchar: | |
3824 | if ((q - buf) < buf_size - 1) | |
3825 | *q++ = c; | |
3826 | } | |
3827 | } | |
3828 | if (!percentd_found) | |
3829 | goto fail; | |
3830 | *q = '\0'; | |
3831 | return 0; | |
3832 | fail: | |
3833 | *q = '\0'; | |
3834 | return -1; | |
3835 | } | |
3836 | ||
3837 | void av_url_split(char *proto, int proto_size, | |
3838 | char *authorization, int authorization_size, | |
3839 | char *hostname, int hostname_size, | |
3840 | int *port_ptr, char *path, int path_size, const char *url) | |
3841 | { | |
3842 | const char *p, *ls, *ls2, *at, *at2, *col, *brk; | |
3843 | ||
3844 | if (port_ptr) | |
3845 | *port_ptr = -1; | |
3846 | if (proto_size > 0) | |
3847 | proto[0] = 0; | |
3848 | if (authorization_size > 0) | |
3849 | authorization[0] = 0; | |
3850 | if (hostname_size > 0) | |
3851 | hostname[0] = 0; | |
3852 | if (path_size > 0) | |
3853 | path[0] = 0; | |
3854 | ||
3855 | /* parse protocol */ | |
3856 | if ((p = strchr(url, ':'))) { | |
3857 | av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url)); | |
3858 | p++; /* skip ':' */ | |
3859 | if (*p == '/') | |
3860 | p++; | |
3861 | if (*p == '/') | |
3862 | p++; | |
3863 | } else { | |
3864 | /* no protocol means plain filename */ | |
3865 | av_strlcpy(path, url, path_size); | |
3866 | return; | |
3867 | } | |
3868 | ||
3869 | /* separate path from hostname */ | |
3870 | ls = strchr(p, '/'); | |
3871 | ls2 = strchr(p, '?'); | |
3872 | if (!ls) | |
3873 | ls = ls2; | |
3874 | else if (ls && ls2) | |
3875 | ls = FFMIN(ls, ls2); | |
3876 | if (ls) | |
3877 | av_strlcpy(path, ls, path_size); | |
3878 | else | |
3879 | ls = &p[strlen(p)]; // XXX | |
3880 | ||
3881 | /* the rest is hostname, use that to parse auth/port */ | |
3882 | if (ls != p) { | |
3883 | /* authorization (user[:pass]@hostname) */ | |
3884 | at2 = p; | |
3885 | while ((at = strchr(p, '@')) && at < ls) { | |
3886 | av_strlcpy(authorization, at2, | |
3887 | FFMIN(authorization_size, at + 1 - at2)); | |
3888 | p = at + 1; /* skip '@' */ | |
3889 | } | |
3890 | ||
3891 | if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) { | |
3892 | /* [host]:port */ | |
3893 | av_strlcpy(hostname, p + 1, | |
3894 | FFMIN(hostname_size, brk - p)); | |
3895 | if (brk[1] == ':' && port_ptr) | |
3896 | *port_ptr = atoi(brk + 2); | |
3897 | } else if ((col = strchr(p, ':')) && col < ls) { | |
3898 | av_strlcpy(hostname, p, | |
3899 | FFMIN(col + 1 - p, hostname_size)); | |
3900 | if (port_ptr) | |
3901 | *port_ptr = atoi(col + 1); | |
3902 | } else | |
3903 | av_strlcpy(hostname, p, | |
3904 | FFMIN(ls + 1 - p, hostname_size)); | |
3905 | } | |
3906 | } | |
3907 | ||
3908 | char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase) | |
3909 | { | |
3910 | int i; | |
3911 | static const char hex_table_uc[16] = { '0', '1', '2', '3', | |
3912 | '4', '5', '6', '7', | |
3913 | '8', '9', 'A', 'B', | |
3914 | 'C', 'D', 'E', 'F' }; | |
3915 | static const char hex_table_lc[16] = { '0', '1', '2', '3', | |
3916 | '4', '5', '6', '7', | |
3917 | '8', '9', 'a', 'b', | |
3918 | 'c', 'd', 'e', 'f' }; | |
3919 | const char *hex_table = lowercase ? hex_table_lc : hex_table_uc; | |
3920 | ||
3921 | for (i = 0; i < s; i++) { | |
3922 | buff[i * 2] = hex_table[src[i] >> 4]; | |
3923 | buff[i * 2 + 1] = hex_table[src[i] & 0xF]; | |
3924 | } | |
3925 | ||
3926 | return buff; | |
3927 | } | |
3928 | ||
3929 | int ff_hex_to_data(uint8_t *data, const char *p) | |
3930 | { | |
3931 | int c, len, v; | |
3932 | ||
3933 | len = 0; | |
3934 | v = 1; | |
3935 | for (;;) { | |
3936 | p += strspn(p, SPACE_CHARS); | |
3937 | if (*p == '\0') | |
3938 | break; | |
3939 | c = av_toupper((unsigned char) *p++); | |
3940 | if (c >= '0' && c <= '9') | |
3941 | c = c - '0'; | |
3942 | else if (c >= 'A' && c <= 'F') | |
3943 | c = c - 'A' + 10; | |
3944 | else | |
3945 | break; | |
3946 | v = (v << 4) | c; | |
3947 | if (v & 0x100) { | |
3948 | if (data) | |
3949 | data[len] = v; | |
3950 | len++; | |
3951 | v = 1; | |
3952 | } | |
3953 | } | |
3954 | return len; | |
3955 | } | |
3956 | ||
2ba45a60 DM |
3957 | void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, |
3958 | unsigned int pts_num, unsigned int pts_den) | |
3959 | { | |
3960 | AVRational new_tb; | |
3961 | if (av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)) { | |
3962 | if (new_tb.num != pts_num) | |
3963 | av_log(NULL, AV_LOG_DEBUG, | |
3964 | "st:%d removing common factor %d from timebase\n", | |
3965 | s->index, pts_num / new_tb.num); | |
3966 | } else | |
3967 | av_log(NULL, AV_LOG_WARNING, | |
3968 | "st:%d has too large timebase, reducing\n", s->index); | |
3969 | ||
3970 | if (new_tb.num <= 0 || new_tb.den <= 0) { | |
3971 | av_log(NULL, AV_LOG_ERROR, | |
3972 | "Ignoring attempt to set invalid timebase %d/%d for st:%d\n", | |
3973 | new_tb.num, new_tb.den, | |
3974 | s->index); | |
3975 | return; | |
3976 | } | |
3977 | s->time_base = new_tb; | |
3978 | av_codec_set_pkt_timebase(s->codec, new_tb); | |
3979 | s->pts_wrap_bits = pts_wrap_bits; | |
3980 | } | |
3981 | ||
3982 | void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, | |
3983 | void *context) | |
3984 | { | |
3985 | const char *ptr = str; | |
3986 | ||
3987 | /* Parse key=value pairs. */ | |
3988 | for (;;) { | |
3989 | const char *key; | |
3990 | char *dest = NULL, *dest_end; | |
3991 | int key_len, dest_len = 0; | |
3992 | ||
3993 | /* Skip whitespace and potential commas. */ | |
3994 | while (*ptr && (av_isspace(*ptr) || *ptr == ',')) | |
3995 | ptr++; | |
3996 | if (!*ptr) | |
3997 | break; | |
3998 | ||
3999 | key = ptr; | |
4000 | ||
4001 | if (!(ptr = strchr(key, '='))) | |
4002 | break; | |
4003 | ptr++; | |
4004 | key_len = ptr - key; | |
4005 | ||
4006 | callback_get_buf(context, key, key_len, &dest, &dest_len); | |
4007 | dest_end = dest + dest_len - 1; | |
4008 | ||
4009 | if (*ptr == '\"') { | |
4010 | ptr++; | |
4011 | while (*ptr && *ptr != '\"') { | |
4012 | if (*ptr == '\\') { | |
4013 | if (!ptr[1]) | |
4014 | break; | |
4015 | if (dest && dest < dest_end) | |
4016 | *dest++ = ptr[1]; | |
4017 | ptr += 2; | |
4018 | } else { | |
4019 | if (dest && dest < dest_end) | |
4020 | *dest++ = *ptr; | |
4021 | ptr++; | |
4022 | } | |
4023 | } | |
4024 | if (*ptr == '\"') | |
4025 | ptr++; | |
4026 | } else { | |
4027 | for (; *ptr && !(av_isspace(*ptr) || *ptr == ','); ptr++) | |
4028 | if (dest && dest < dest_end) | |
4029 | *dest++ = *ptr; | |
4030 | } | |
4031 | if (dest) | |
4032 | *dest = 0; | |
4033 | } | |
4034 | } | |
4035 | ||
4036 | int ff_find_stream_index(AVFormatContext *s, int id) | |
4037 | { | |
4038 | int i; | |
4039 | for (i = 0; i < s->nb_streams; i++) | |
4040 | if (s->streams[i]->id == id) | |
4041 | return i; | |
4042 | return -1; | |
4043 | } | |
4044 | ||
4045 | int64_t ff_iso8601_to_unix_time(const char *datestr) | |
4046 | { | |
4047 | struct tm time1 = { 0 }, time2 = { 0 }; | |
4048 | char *ret1, *ret2; | |
4049 | ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1); | |
4050 | ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2); | |
4051 | if (ret2 && !ret1) | |
4052 | return av_timegm(&time2); | |
4053 | else | |
4054 | return av_timegm(&time1); | |
4055 | } | |
4056 | ||
4057 | int avformat_query_codec(const AVOutputFormat *ofmt, enum AVCodecID codec_id, | |
4058 | int std_compliance) | |
4059 | { | |
4060 | if (ofmt) { | |
4061 | if (ofmt->query_codec) | |
4062 | return ofmt->query_codec(codec_id, std_compliance); | |
4063 | else if (ofmt->codec_tag) | |
4064 | return !!av_codec_get_tag(ofmt->codec_tag, codec_id); | |
4065 | else if (codec_id == ofmt->video_codec || | |
4066 | codec_id == ofmt->audio_codec || | |
4067 | codec_id == ofmt->subtitle_codec) | |
4068 | return 1; | |
4069 | } | |
4070 | return AVERROR_PATCHWELCOME; | |
4071 | } | |
4072 | ||
4073 | int avformat_network_init(void) | |
4074 | { | |
4075 | #if CONFIG_NETWORK | |
4076 | int ret; | |
4077 | ff_network_inited_globally = 1; | |
4078 | if ((ret = ff_network_init()) < 0) | |
4079 | return ret; | |
4080 | ff_tls_init(); | |
4081 | #endif | |
4082 | return 0; | |
4083 | } | |
4084 | ||
4085 | int avformat_network_deinit(void) | |
4086 | { | |
4087 | #if CONFIG_NETWORK | |
4088 | ff_network_close(); | |
4089 | ff_tls_deinit(); | |
4090 | #endif | |
4091 | return 0; | |
4092 | } | |
4093 | ||
4094 | int ff_add_param_change(AVPacket *pkt, int32_t channels, | |
4095 | uint64_t channel_layout, int32_t sample_rate, | |
4096 | int32_t width, int32_t height) | |
4097 | { | |
4098 | uint32_t flags = 0; | |
4099 | int size = 4; | |
4100 | uint8_t *data; | |
4101 | if (!pkt) | |
4102 | return AVERROR(EINVAL); | |
4103 | if (channels) { | |
4104 | size += 4; | |
4105 | flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT; | |
4106 | } | |
4107 | if (channel_layout) { | |
4108 | size += 8; | |
4109 | flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT; | |
4110 | } | |
4111 | if (sample_rate) { | |
4112 | size += 4; | |
4113 | flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE; | |
4114 | } | |
4115 | if (width || height) { | |
4116 | size += 8; | |
4117 | flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS; | |
4118 | } | |
4119 | data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size); | |
4120 | if (!data) | |
4121 | return AVERROR(ENOMEM); | |
4122 | bytestream_put_le32(&data, flags); | |
4123 | if (channels) | |
4124 | bytestream_put_le32(&data, channels); | |
4125 | if (channel_layout) | |
4126 | bytestream_put_le64(&data, channel_layout); | |
4127 | if (sample_rate) | |
4128 | bytestream_put_le32(&data, sample_rate); | |
4129 | if (width || height) { | |
4130 | bytestream_put_le32(&data, width); | |
4131 | bytestream_put_le32(&data, height); | |
4132 | } | |
4133 | return 0; | |
4134 | } | |
4135 | ||
4136 | AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame) | |
4137 | { | |
4138 | AVRational undef = {0, 1}; | |
4139 | AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef; | |
4140 | AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef; | |
4141 | AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio; | |
4142 | ||
4143 | av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den, | |
4144 | stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX); | |
4145 | if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0) | |
4146 | stream_sample_aspect_ratio = undef; | |
4147 | ||
4148 | av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den, | |
4149 | frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX); | |
4150 | if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0) | |
4151 | frame_sample_aspect_ratio = undef; | |
4152 | ||
4153 | if (stream_sample_aspect_ratio.num) | |
4154 | return stream_sample_aspect_ratio; | |
4155 | else | |
4156 | return frame_sample_aspect_ratio; | |
4157 | } | |
4158 | ||
4159 | AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame) | |
4160 | { | |
4161 | AVRational fr = st->r_frame_rate; | |
f6fa7814 | 4162 | AVRational codec_fr = st->codec->framerate; |
2ba45a60 DM |
4163 | AVRational avg_fr = st->avg_frame_rate; |
4164 | ||
4165 | if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 && | |
4166 | av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) { | |
4167 | fr = avg_fr; | |
4168 | } | |
4169 | ||
4170 | ||
4171 | if (st->codec->ticks_per_frame > 1) { | |
2ba45a60 DM |
4172 | if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7 |
4173 | && fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1) | |
4174 | fr = codec_fr; | |
4175 | } | |
4176 | ||
4177 | return fr; | |
4178 | } | |
4179 | ||
4180 | int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, | |
4181 | const char *spec) | |
4182 | { | |
4183 | if (*spec <= '9' && *spec >= '0') /* opt:index */ | |
4184 | return strtol(spec, NULL, 0) == st->index; | |
4185 | else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' || | |
4186 | *spec == 't') { /* opt:[vasdt] */ | |
4187 | enum AVMediaType type; | |
4188 | ||
4189 | switch (*spec++) { | |
4190 | case 'v': type = AVMEDIA_TYPE_VIDEO; break; | |
4191 | case 'a': type = AVMEDIA_TYPE_AUDIO; break; | |
4192 | case 's': type = AVMEDIA_TYPE_SUBTITLE; break; | |
4193 | case 'd': type = AVMEDIA_TYPE_DATA; break; | |
4194 | case 't': type = AVMEDIA_TYPE_ATTACHMENT; break; | |
4195 | default: av_assert0(0); | |
4196 | } | |
4197 | if (type != st->codec->codec_type) | |
4198 | return 0; | |
4199 | if (*spec++ == ':') { /* possibly followed by :index */ | |
4200 | int i, index = strtol(spec, NULL, 0); | |
4201 | for (i = 0; i < s->nb_streams; i++) | |
4202 | if (s->streams[i]->codec->codec_type == type && index-- == 0) | |
4203 | return i == st->index; | |
4204 | return 0; | |
4205 | } | |
4206 | return 1; | |
4207 | } else if (*spec == 'p' && *(spec + 1) == ':') { | |
4208 | int prog_id, i, j; | |
4209 | char *endptr; | |
4210 | spec += 2; | |
4211 | prog_id = strtol(spec, &endptr, 0); | |
4212 | for (i = 0; i < s->nb_programs; i++) { | |
4213 | if (s->programs[i]->id != prog_id) | |
4214 | continue; | |
4215 | ||
4216 | if (*endptr++ == ':') { | |
4217 | int stream_idx = strtol(endptr, NULL, 0); | |
4218 | return stream_idx >= 0 && | |
4219 | stream_idx < s->programs[i]->nb_stream_indexes && | |
4220 | st->index == s->programs[i]->stream_index[stream_idx]; | |
4221 | } | |
4222 | ||
4223 | for (j = 0; j < s->programs[i]->nb_stream_indexes; j++) | |
4224 | if (st->index == s->programs[i]->stream_index[j]) | |
4225 | return 1; | |
4226 | } | |
4227 | return 0; | |
4228 | } else if (*spec == '#' || | |
4229 | (*spec == 'i' && *(spec + 1) == ':')) { | |
4230 | int stream_id; | |
4231 | char *endptr; | |
4232 | spec += 1 + (*spec == 'i'); | |
4233 | stream_id = strtol(spec, &endptr, 0); | |
4234 | if (!*endptr) | |
4235 | return stream_id == st->id; | |
4236 | } else if (*spec == 'm' && *(spec + 1) == ':') { | |
4237 | AVDictionaryEntry *tag; | |
4238 | char *key, *val; | |
4239 | int ret; | |
4240 | ||
4241 | spec += 2; | |
4242 | val = strchr(spec, ':'); | |
4243 | ||
4244 | key = val ? av_strndup(spec, val - spec) : av_strdup(spec); | |
4245 | if (!key) | |
4246 | return AVERROR(ENOMEM); | |
4247 | ||
4248 | tag = av_dict_get(st->metadata, key, NULL, 0); | |
4249 | if (tag) { | |
4250 | if (!val || !strcmp(tag->value, val + 1)) | |
4251 | ret = 1; | |
4252 | else | |
4253 | ret = 0; | |
4254 | } else | |
4255 | ret = 0; | |
4256 | ||
4257 | av_freep(&key); | |
4258 | return ret; | |
4259 | } else if (!*spec) /* empty specifier, matches everything */ | |
4260 | return 1; | |
4261 | ||
4262 | av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec); | |
4263 | return AVERROR(EINVAL); | |
4264 | } | |
4265 | ||
4266 | int ff_generate_avci_extradata(AVStream *st) | |
4267 | { | |
4268 | static const uint8_t avci100_1080p_extradata[] = { | |
4269 | // SPS | |
4270 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, | |
4271 | 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63, | |
4272 | 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19, | |
4273 | 0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e, | |
4274 | 0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8, | |
4275 | 0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2, | |
4276 | 0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00, | |
4277 | 0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca, | |
4278 | 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
4279 | // PPS | |
4280 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48, | |
4281 | 0xd0 | |
4282 | }; | |
4283 | static const uint8_t avci100_1080i_extradata[] = { | |
4284 | // SPS | |
4285 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, | |
4286 | 0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63, | |
4287 | 0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19, | |
4288 | 0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65, | |
4289 | 0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26, | |
4290 | 0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50, | |
4291 | 0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e, | |
4292 | 0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28, | |
4293 | 0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0, | |
4294 | 0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03, | |
4295 | 0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00, | |
4296 | // PPS | |
4297 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48, | |
4298 | 0xd0 | |
4299 | }; | |
f6fa7814 DM |
4300 | static const uint8_t avci50_1080p_extradata[] = { |
4301 | // SPS | |
4302 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28, | |
4303 | 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18, | |
4304 | 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c, | |
4305 | 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37, | |
4306 | 0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde, | |
4307 | 0x6e, 0x6c, 0xd3, 0x3c, 0x05, 0xa0, 0x22, 0x7e, | |
4308 | 0x5f, 0xfc, 0x00, 0x0c, 0x00, 0x13, 0x8c, 0x04, | |
4309 | 0x04, 0x05, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, | |
4310 | 0x00, 0x03, 0x00, 0x32, 0x84, 0x00, 0x00, 0x00, | |
4311 | // PPS | |
4312 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12, | |
4313 | 0x11 | |
4314 | }; | |
2ba45a60 DM |
4315 | static const uint8_t avci50_1080i_extradata[] = { |
4316 | // SPS | |
4317 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28, | |
4318 | 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18, | |
4319 | 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c, | |
4320 | 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61, | |
4321 | 0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06, | |
4322 | 0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63, | |
4323 | 0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19, | |
4324 | 0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16, | |
4325 | 0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01, | |
4326 | 0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03, | |
4327 | 0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00, | |
4328 | // PPS | |
4329 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12, | |
4330 | 0x11 | |
4331 | }; | |
4332 | static const uint8_t avci100_720p_extradata[] = { | |
4333 | // SPS | |
4334 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, | |
4335 | 0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62, | |
4336 | 0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5, | |
4337 | 0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8, | |
4338 | 0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95, | |
4339 | 0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43, | |
4340 | 0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01, | |
4341 | 0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05, | |
4342 | 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03, | |
4343 | 0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, | |
4344 | // PPS | |
4345 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12, | |
4346 | 0x11 | |
4347 | }; | |
f6fa7814 DM |
4348 | static const uint8_t avci50_720p_extradata[] = { |
4349 | // SPS | |
4350 | 0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x20, | |
4351 | 0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18, | |
4352 | 0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c, | |
4353 | 0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37, | |
4354 | 0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde, | |
4355 | 0x6e, 0x6c, 0xd3, 0x3c, 0x0f, 0x01, 0x6e, 0xff, | |
4356 | 0xc0, 0x00, 0xc0, 0x01, 0x38, 0xc0, 0x40, 0x40, | |
4357 | 0x50, 0x00, 0x00, 0x03, 0x00, 0x10, 0x00, 0x00, | |
4358 | 0x06, 0x48, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, | |
4359 | // PPS | |
4360 | 0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12, | |
4361 | 0x11 | |
4362 | }; | |
2ba45a60 DM |
4363 | |
4364 | const uint8_t *data = NULL; | |
4365 | int size = 0; | |
4366 | ||
4367 | if (st->codec->width == 1920) { | |
4368 | if (st->codec->field_order == AV_FIELD_PROGRESSIVE) { | |
4369 | data = avci100_1080p_extradata; | |
4370 | size = sizeof(avci100_1080p_extradata); | |
4371 | } else { | |
4372 | data = avci100_1080i_extradata; | |
4373 | size = sizeof(avci100_1080i_extradata); | |
4374 | } | |
4375 | } else if (st->codec->width == 1440) { | |
f6fa7814 DM |
4376 | if (st->codec->field_order == AV_FIELD_PROGRESSIVE) { |
4377 | data = avci50_1080p_extradata; | |
4378 | size = sizeof(avci50_1080p_extradata); | |
4379 | } else { | |
4380 | data = avci50_1080i_extradata; | |
4381 | size = sizeof(avci50_1080i_extradata); | |
4382 | } | |
2ba45a60 DM |
4383 | } else if (st->codec->width == 1280) { |
4384 | data = avci100_720p_extradata; | |
4385 | size = sizeof(avci100_720p_extradata); | |
f6fa7814 DM |
4386 | } else if (st->codec->width == 960) { |
4387 | data = avci50_720p_extradata; | |
4388 | size = sizeof(avci50_720p_extradata); | |
2ba45a60 DM |
4389 | } |
4390 | ||
4391 | if (!size) | |
4392 | return 0; | |
4393 | ||
4394 | av_freep(&st->codec->extradata); | |
4395 | if (ff_alloc_extradata(st->codec, size)) | |
4396 | return AVERROR(ENOMEM); | |
4397 | memcpy(st->codec->extradata, data, size); | |
4398 | ||
4399 | return 0; | |
4400 | } | |
4401 | ||
4402 | uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type, | |
4403 | int *size) | |
4404 | { | |
4405 | int i; | |
4406 | ||
4407 | for (i = 0; i < st->nb_side_data; i++) { | |
4408 | if (st->side_data[i].type == type) { | |
4409 | if (size) | |
4410 | *size = st->side_data[i].size; | |
4411 | return st->side_data[i].data; | |
4412 | } | |
4413 | } | |
4414 | return NULL; | |
4415 | } |