FFmpeg  4.4.5
src_movie.c
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1 /*
2  * Copyright (c) 2010 Stefano Sabatini
3  * Copyright (c) 2008 Victor Paesa
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 /**
23  * @file
24  * movie video source
25  *
26  * @todo use direct rendering (no allocation of a new frame)
27  * @todo support a PTS correction mechanism
28  */
29 
30 #include <float.h>
31 #include <stdint.h>
32 
33 #include "libavutil/attributes.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/avassert.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/imgutils.h"
38 #include "libavutil/internal.h"
39 #include "libavutil/timestamp.h"
40 
41 #include "libavcodec/avcodec.h"
42 
43 #include "libavformat/avformat.h"
44 
45 #include "audio.h"
46 #include "avfilter.h"
47 #include "formats.h"
48 #include "internal.h"
49 #include "video.h"
50 
51 typedef struct MovieStream {
56 } MovieStream;
57 
58 typedef struct MovieContext {
59  /* common A/V fields */
60  const AVClass *class;
61  int64_t seek_point; ///< seekpoint in microseconds
62  double seek_point_d;
63  char *format_name;
64  char *file_name;
65  char *stream_specs; /**< user-provided list of streams, separated by + */
66  int stream_index; /**< for compatibility */
70 
72 
73  int max_stream_index; /**< max stream # actually used for output */
74  MovieStream *st; /**< array of all streams, one per output */
75  int *out_index; /**< stream number -> output number map, or -1 */
76 } MovieContext;
77 
78 #define OFFSET(x) offsetof(MovieContext, x)
79 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
80 
81 static const AVOption movie_options[]= {
82  { "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
83  { "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
84  { "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
85  { "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
86  { "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
87  { "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
88  { "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
89  { "streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
90  { "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
91  { "loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, FLAGS },
92  { "discontinuity", "set discontinuity threshold", OFFSET(discontinuity_threshold), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
93  { NULL },
94 };
95 
96 static int movie_config_output_props(AVFilterLink *outlink);
97 static int movie_request_frame(AVFilterLink *outlink);
98 
99 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
100 {
101  int i, ret, already = 0, stream_id = -1;
102  char type_char[2], dummy;
103  AVStream *found = NULL;
104  enum AVMediaType type;
105 
106  ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
107  if (ret >= 1 && ret <= 2) {
108  type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
109  ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
110  if (ret < 0) {
111  av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
112  av_get_media_type_string(type), stream_id);
113  return NULL;
114  }
115  return avf->streams[ret];
116  }
117  for (i = 0; i < avf->nb_streams; i++) {
118  ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
119  if (ret < 0) {
120  av_log(log, AV_LOG_ERROR,
121  "Invalid stream specifier \"%s\"\n", spec);
122  return NULL;
123  }
124  if (!ret)
125  continue;
126  if (avf->streams[i]->discard != AVDISCARD_ALL) {
127  already++;
128  continue;
129  }
130  if (found) {
131  av_log(log, AV_LOG_WARNING,
132  "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
133  break;
134  }
135  found = avf->streams[i];
136  }
137  if (!found) {
138  av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
139  already ? "matched only already used streams" :
140  "did not match any stream");
141  return NULL;
142  }
143  if (found->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
145  av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
146  "currently unsupported by libavfilter\n", spec,
148  return NULL;
149  }
150  return found;
151 }
152 
154 {
155  const AVCodec *codec;
156  int ret;
157 
158  codec = avcodec_find_decoder(st->st->codecpar->codec_id);
159  if (!codec) {
160  av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
161  return AVERROR(EINVAL);
162  }
163 
164  st->codec_ctx = avcodec_alloc_context3(codec);
165  if (!st->codec_ctx)
166  return AVERROR(ENOMEM);
167 
169  if (ret < 0)
170  return ret;
171 
173 
174  if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
175  av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
176  return ret;
177  }
178 
179  return 0;
180 }
181 
182 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
183 {
184  AVCodecParameters *dec_par = st->st->codecpar;
185  char buf[256];
187 
188  if (!chl) {
189  av_log(log_ctx, AV_LOG_ERROR,
190  "Channel layout is not set in stream %d, and could not "
191  "be guessed from the number of channels (%d)\n",
192  st_index, dec_par->channels);
193  return AVERROR(EINVAL);
194  }
195 
196  av_get_channel_layout_string(buf, sizeof(buf), dec_par->channels, chl);
197  av_log(log_ctx, AV_LOG_WARNING,
198  "Channel layout is not set in output stream %d, "
199  "guessed channel layout is '%s'\n",
200  st_index, buf);
201  dec_par->channel_layout = chl;
202  return 0;
203 }
204 
206 {
207  MovieContext *movie = ctx->priv;
209  int64_t timestamp;
210  int nb_streams = 1, ret, i;
211  char default_streams[16], *stream_specs, *spec, *cursor;
212  AVStream *st;
213 
214  if (!movie->file_name) {
215  av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
216  return AVERROR(EINVAL);
217  }
218 
219  movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
220 
221  stream_specs = movie->stream_specs;
222  if (!stream_specs) {
223  snprintf(default_streams, sizeof(default_streams), "d%c%d",
224  !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
225  movie->stream_index);
226  stream_specs = default_streams;
227  }
228  for (cursor = stream_specs; *cursor; cursor++)
229  if (*cursor == '+')
230  nb_streams++;
231 
232  if (movie->loop_count != 1 && nb_streams != 1) {
234  "Loop with several streams is currently unsupported\n");
235  return AVERROR_PATCHWELCOME;
236  }
237 
238  // Try to find the movie format (container)
240 
241  movie->format_ctx = NULL;
242  if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
244  "Failed to avformat_open_input '%s'\n", movie->file_name);
245  return ret;
246  }
247  if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
248  av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
249 
250  // if seeking requested, we execute it
251  if (movie->seek_point > 0) {
252  timestamp = movie->seek_point;
253  // add the stream start time, should it exist
254  if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
255  if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
257  "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
258  movie->file_name, movie->format_ctx->start_time, movie->seek_point);
259  return AVERROR(EINVAL);
260  }
261  timestamp += movie->format_ctx->start_time;
262  }
263  if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
264  av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
265  movie->file_name, timestamp);
266  return ret;
267  }
268  }
269 
270  for (i = 0; i < movie->format_ctx->nb_streams; i++)
272 
273  movie->st = av_calloc(nb_streams, sizeof(*movie->st));
274  if (!movie->st)
275  return AVERROR(ENOMEM);
276 
277  for (i = 0; i < nb_streams; i++) {
278  spec = av_strtok(stream_specs, "+", &cursor);
279  if (!spec)
280  return AVERROR_BUG;
281  stream_specs = NULL; /* for next strtok */
282  st = find_stream(ctx, movie->format_ctx, spec);
283  if (!st)
284  return AVERROR(EINVAL);
286  movie->st[i].st = st;
287  movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
288  movie->st[i].discontinuity_threshold =
290  }
291  if (av_strtok(NULL, "+", &cursor))
292  return AVERROR_BUG;
293 
294  movie->out_index = av_calloc(movie->max_stream_index + 1,
295  sizeof(*movie->out_index));
296  if (!movie->out_index)
297  return AVERROR(ENOMEM);
298  for (i = 0; i <= movie->max_stream_index; i++)
299  movie->out_index[i] = -1;
300  for (i = 0; i < nb_streams; i++) {
301  AVFilterPad pad = { 0 };
302  movie->out_index[movie->st[i].st->index] = i;
303  pad.type = movie->st[i].st->codecpar->codec_type;
304  pad.name = av_asprintf("out%d", i);
305  if (!pad.name)
306  return AVERROR(ENOMEM);
309  if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
310  av_freep(&pad.name);
311  return ret;
312  }
313  if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
314  !movie->st[i].st->codecpar->channel_layout) {
315  ret = guess_channel_layout(&movie->st[i], i, ctx);
316  if (ret < 0)
317  return ret;
318  }
319  ret = open_stream(ctx, &movie->st[i]);
320  if (ret < 0)
321  return ret;
322  }
323 
324  av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
325  movie->seek_point, movie->format_name, movie->file_name,
326  movie->stream_index);
327 
328  return 0;
329 }
330 
332 {
333  MovieContext *movie = ctx->priv;
334  int i;
335 
336  for (i = 0; i < ctx->nb_outputs; i++) {
337  av_freep(&ctx->output_pads[i].name);
338  if (movie->st[i].st)
340  }
341  av_freep(&movie->st);
342  av_freep(&movie->out_index);
343  if (movie->format_ctx)
345 }
346 
348 {
349  MovieContext *movie = ctx->priv;
350  int list[] = { 0, -1 };
351  int64_t list64[] = { 0, -1 };
352  int i, ret;
353 
354  for (i = 0; i < ctx->nb_outputs; i++) {
355  MovieStream *st = &movie->st[i];
356  AVCodecParameters *c = st->st->codecpar;
357  AVFilterLink *outlink = ctx->outputs[i];
358 
359  switch (c->codec_type) {
360  case AVMEDIA_TYPE_VIDEO:
361  list[0] = c->format;
362  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.formats)) < 0)
363  return ret;
364  break;
365  case AVMEDIA_TYPE_AUDIO:
366  list[0] = c->format;
367  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.formats)) < 0)
368  return ret;
369  list[0] = c->sample_rate;
370  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.samplerates)) < 0)
371  return ret;
372  list64[0] = c->channel_layout;
374  &outlink->incfg.channel_layouts)) < 0)
375  return ret;
376  break;
377  }
378  }
379 
380  return 0;
381 }
382 
384 {
385  AVFilterContext *ctx = outlink->src;
386  MovieContext *movie = ctx->priv;
387  unsigned out_id = FF_OUTLINK_IDX(outlink);
388  MovieStream *st = &movie->st[out_id];
389  AVCodecParameters *c = st->st->codecpar;
390 
391  outlink->time_base = st->st->time_base;
392 
393  switch (c->codec_type) {
394  case AVMEDIA_TYPE_VIDEO:
395  outlink->w = c->width;
396  outlink->h = c->height;
397  outlink->frame_rate = st->st->r_frame_rate;
398  break;
399  case AVMEDIA_TYPE_AUDIO:
400  break;
401  }
402 
403  return 0;
404 }
405 
406 static char *describe_frame_to_str(char *dst, size_t dst_size,
408  AVFilterLink *link)
409 {
410  switch (frame_type) {
411  case AVMEDIA_TYPE_VIDEO:
412  snprintf(dst, dst_size,
413  "video pts:%s time:%s size:%dx%d aspect:%d/%d",
415  frame->width, frame->height,
418  break;
419  case AVMEDIA_TYPE_AUDIO:
420  snprintf(dst, dst_size,
421  "audio pts:%s time:%s samples:%d",
423  frame->nb_samples);
424  break;
425  default:
426  snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type));
427  break;
428  }
429  return dst;
430 }
431 
433 {
434  MovieContext *movie = ctx->priv;
435  int64_t timestamp = movie->seek_point;
436  int ret, i;
437 
438  if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
439  timestamp += movie->format_ctx->start_time;
440  ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
441  if (ret < 0) {
442  av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
443  movie->loop_count = 1; /* do not try again */
444  return ret;
445  }
446 
447  for (i = 0; i < ctx->nb_outputs; i++) {
449  }
450  return 0;
451 }
452 
454 {
455  MovieContext *movie = ctx->priv;
456  AVPacket pkt = { 0 };
457  int pkt_out_id, ret;
458 
459  /* read a new packet from input stream */
460  ret = av_read_frame(movie->format_ctx, &pkt);
461  if (ret == AVERROR_EOF) {
462  /* EOF -> set all decoders for flushing */
463  for (int i = 0; i < ctx->nb_outputs; i++) {
464  ret = avcodec_send_packet(movie->st[i].codec_ctx, NULL);
465  if (ret < 0 && ret != AVERROR_EOF)
466  return ret;
467  }
468 
469  return 0;
470  } else if (ret < 0)
471  return ret;
472 
473  /* send the packet to its decoder, if any */
474  pkt_out_id = pkt.stream_index > movie->max_stream_index ? -1 :
475  movie->out_index[pkt.stream_index];
476  if (pkt_out_id >= 0)
477  ret = avcodec_send_packet(movie->st[pkt_out_id].codec_ctx, &pkt);
479 
480  return ret;
481 }
482 
483 /**
484  * Try to push a frame to the requested output.
485  *
486  * @param ctx filter context
487  * @param out_id number of output where a frame is wanted;
488  * @return 0 if a frame was pushed on the requested output,
489  * AVERROR(EAGAIN) if the decoder requires more input
490  * AVERROR(EOF) if the decoder has been completely flushed
491  * <0 AVERROR code
492  */
493 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
494 {
495  MovieContext *movie = ctx->priv;
496  MovieStream *st = &movie->st[out_id];
497  AVFilterLink *outlink = ctx->outputs[out_id];
498  AVFrame *frame;
499  int ret;
500 
501  frame = av_frame_alloc();
502  if (!frame)
503  return AVERROR(ENOMEM);
504 
506  if (ret < 0) {
507  if (ret != AVERROR_EOF && ret != AVERROR(EAGAIN))
508  av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
509 
511  return ret;
512  }
513 
515  if (frame->pts != AV_NOPTS_VALUE) {
516  if (movie->ts_offset)
518  if (st->discontinuity_threshold) {
519  if (st->last_pts != AV_NOPTS_VALUE) {
520  int64_t diff = frame->pts - st->last_pts;
521  if (diff < 0 || diff > st->discontinuity_threshold) {
522  av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", out_id, diff);
524  frame->pts -= diff;
525  }
526  }
527  }
528  st->last_pts = frame->pts;
529  }
530  ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
531  describe_frame_to_str((char[1024]){0}, 1024, frame,
532  st->st->codecpar->codec_type, outlink));
533 
534  if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
535  if (frame->format != outlink->format) {
536  av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
537  av_get_pix_fmt_name(outlink->format),
539  );
541  return 0;
542  }
543  }
544  ret = ff_filter_frame(outlink, frame);
545 
546  if (ret < 0)
547  return ret;
548  return 0;
549 }
550 
551 static int movie_request_frame(AVFilterLink *outlink)
552 {
553  AVFilterContext *ctx = outlink->src;
554  MovieContext *movie = ctx->priv;
555  unsigned out_id = FF_OUTLINK_IDX(outlink);
556 
557  while (1) {
558  int got_eagain = 0, got_eof = 0;
559  int ret = 0;
560 
561  /* check all decoders for available output */
562  for (int i = 0; i < ctx->nb_outputs; i++) {
563  ret = movie_push_frame(ctx, i);
564  if (ret == AVERROR(EAGAIN))
565  got_eagain++;
566  else if (ret == AVERROR_EOF)
567  got_eof++;
568  else if (ret < 0)
569  return ret;
570  else if (i == out_id)
571  return 0;
572  }
573 
574  if (got_eagain) {
575  /* all decoders require more input -> read a new packet */
576  ret = movie_decode_packet(ctx);
577  if (ret < 0)
578  return ret;
579  } else if (got_eof) {
580  /* all decoders flushed */
581  if (movie->loop_count != 1) {
582  ret = rewind_file(ctx);
583  if (ret < 0)
584  return ret;
585  movie->loop_count -= movie->loop_count > 1;
586  av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
587  continue;
588  }
589  return AVERROR_EOF;
590  }
591  }
592 }
593 
594 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
595  char *res, int res_len, int flags)
596 {
597  MovieContext *movie = ctx->priv;
598  int ret = AVERROR(ENOSYS);
599 
600  if (!strcmp(cmd, "seek")) {
601  int idx, flags, i;
602  int64_t ts;
603  char tail[2];
604 
605  if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
606  return AVERROR(EINVAL);
607 
608  ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
609  if (ret < 0)
610  return ret;
611 
612  for (i = 0; i < ctx->nb_outputs; i++) {
614  }
615  return ret;
616  } else if (!strcmp(cmd, "get_duration")) {
617  int print_len;
618  char tail[2];
619 
620  if (!res || res_len <= 0)
621  return AVERROR(EINVAL);
622 
623  if (args && sscanf(args, "%1s", tail) == 1)
624  return AVERROR(EINVAL);
625 
626  print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
627  if (print_len < 0 || print_len >= res_len)
628  return AVERROR(EINVAL);
629 
630  return 0;
631  }
632 
633  return ret;
634 }
635 
636 #if CONFIG_MOVIE_FILTER
637 
638 AVFILTER_DEFINE_CLASS(movie);
639 
641  .name = "movie",
642  .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
643  .priv_size = sizeof(MovieContext),
644  .priv_class = &movie_class,
646  .uninit = movie_uninit,
648 
649  .inputs = NULL,
650  .outputs = NULL,
653 };
654 
655 #endif /* CONFIG_MOVIE_FILTER */
656 
657 #if CONFIG_AMOVIE_FILTER
658 
659 #define amovie_options movie_options
660 AVFILTER_DEFINE_CLASS(amovie);
661 
663  .name = "amovie",
664  .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
665  .priv_size = sizeof(MovieContext),
667  .uninit = movie_uninit,
669 
670  .inputs = NULL,
671  .outputs = NULL,
672  .priv_class = &amovie_class,
675 };
676 
677 #endif /* CONFIG_AMOVIE_FILTER */
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:243
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
AVFilter ff_avsrc_amovie
AVFilter ff_avsrc_movie
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:88
simple assert() macros that are a bit more flexible than ISO C assert().
Libavcodec external API header.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
Main libavfilter public API header.
Main libavformat public API header.
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2415
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:31
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define FFMAX(a, b)
Definition: common.h:103
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:279
static AVFrame * frame
static int got_eagain(void)
Definition: ffmpeg.c:4235
static AVInputFormat * iformat
Definition: ffprobe.c:260
static int nb_streams
Definition: ffprobe.c:283
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add ref as a new reference to formats.
Definition: formats.c:466
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
AVFilterChannelLayouts * ff_make_format64_list(const int64_t *fmts)
Definition: formats.c:295
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:461
@ AV_OPT_TYPE_DURATION
Definition: opt.h:239
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:227
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
void av_get_channel_layout_string(char *buf, int buf_size, int nb_channels, uint64_t channel_layout)
Return a description of a channel layout.
int64_t av_get_default_channel_layout(int nb_channels)
Return default channel layout for a given number of channels.
int attribute_align_arg avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: avcodec.c:144
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:946
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
Definition: codec_par.c:147
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:173
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
Definition: options.c:188
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
Definition: decode.c:652
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
Definition: decode.c:589
@ AVDISCARD_ALL
discard all
Definition: avcodec.h:236
@ AVDISCARD_DEFAULT
discard useless packets like 0 size packets in avi
Definition: avcodec.h:231
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: avcodec.c:491
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:634
ff_const59 AVInputFormat * av_find_input_format(const char *short_name)
Find AVInputFormat based on the short name of the input format.
Definition: format.c:118
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1741
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2489
int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec **decoder_ret, int flags)
Find the "best" stream in the file.
Definition: utils.c:4230
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3602
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4481
int avformat_open_input(AVFormatContext **ps, const char *url, ff_const59 AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:512
int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, const char *spec)
Check if the stream st contained in s is matched by the stream specifier spec.
Definition: utils.c:5326
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:112
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AV_ROUND_UP
Round toward +infinity.
Definition: mathematics.h:83
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
Definition: mathematics.c:134
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
AVMediaType
Definition: avutil.h:199
const char * av_get_media_type_string(enum AVMediaType media_type)
Return a string describing the media_type enum, NULL if media_type is unknown.
Definition: utils.c:71
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:186
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
for(j=16;j >0;--j)
static int format_name(const char *buf, char **s, int index, const char *varname)
Definition: hlsenc.c:1949
cl_device_type type
misc image utilities
int i
Definition: input.c:407
frame_type
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:248
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:288
#define FF_OUTLINK_IDX(link)
Definition: internal.h:303
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
int dummy
Definition: motion.c:64
AVOptions.
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2489
#define snprintf
Definition: snprintf.h:34
static av_cold int movie_common_init(AVFilterContext *ctx)
Definition: src_movie.c:205
static int movie_request_frame(AVFilterLink *outlink)
Definition: src_movie.c:551
static int open_stream(AVFilterContext *ctx, MovieStream *st)
Definition: src_movie.c:153
static av_cold void movie_uninit(AVFilterContext *ctx)
Definition: src_movie.c:331
static char * describe_frame_to_str(char *dst, size_t dst_size, AVFrame *frame, enum AVMediaType frame_type, AVFilterLink *link)
Definition: src_movie.c:406
static AVStream * find_stream(void *log, AVFormatContext *avf, const char *spec)
Definition: src_movie.c:99
static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
Try to push a frame to the requested output.
Definition: src_movie.c:493
#define FLAGS
Definition: src_movie.c:79
static int movie_config_output_props(AVFilterLink *outlink)
Definition: src_movie.c:383
static int rewind_file(AVFilterContext *ctx)
Definition: src_movie.c:432
static const AVOption movie_options[]
Definition: src_movie.c:81
static int movie_decode_packet(AVFilterContext *ctx)
Definition: src_movie.c:453
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: src_movie.c:594
static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
Definition: src_movie.c:182
#define OFFSET(x)
Definition: src_movie.c:78
static int movie_query_formats(AVFilterContext *ctx)
Definition: src_movie.c:347
Describe the class of an AVClass context structure.
Definition: log.h:67
main external API structure.
Definition: avcodec.h:536
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1773
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
int channels
Audio only.
Definition: codec_par.h:166
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVCodec.
Definition: codec.h:197
An instance of a filter.
Definition: avfilter.h:341
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:445
AVFilterChannelLayouts * channel_layouts
Lists of supported channel layouts, only for audio.
Definition: avfilter.h:455
AVFilterFormats * samplerates
Lists of supported sample rates, only for audio.
Definition: avfilter.h:450
A filter pad used for either input or output.
Definition: internal.h:54
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:102
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:118
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
Format I/O context.
Definition: avformat.h:1232
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1288
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1337
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1300
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1347
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:384
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:411
int64_t best_effort_timestamp
frame timestamp estimated using various heuristics, in stream time base
Definition: frame.h:582
int width
Definition: frame.h:376
int height
Definition: frame.h:376
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:406
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:391
AVOption.
Definition: opt.h:248
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:928
int index
stream index in AVFormatContext
Definition: avformat.h:874
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1015
int64_t seek_point
seekpoint in microseconds
Definition: src_movie.c:61
int stream_index
for compatibility
Definition: src_movie.c:66
int loop_count
Definition: src_movie.c:67
AVFormatContext * format_ctx
Definition: src_movie.c:71
int max_stream_index
max stream # actually used for output
Definition: src_movie.c:73
double seek_point_d
Definition: src_movie.c:62
char * file_name
Definition: src_movie.c:64
char * format_name
Definition: src_movie.c:63
char * stream_specs
user-provided list of streams, separated by +
Definition: src_movie.c:65
int * out_index
stream number -> output number map, or -1
Definition: src_movie.c:75
MovieStream * st
array of all streams, one per output
Definition: src_movie.c:74
int64_t discontinuity_threshold
Definition: src_movie.c:68
int64_t ts_offset
Definition: src_movie.c:69
int64_t last_pts
Definition: src_movie.c:55
AVStream * st
Definition: src_movie.c:52
int64_t discontinuity_threshold
Definition: src_movie.c:54
AVCodecContext * codec_ctx
Definition: src_movie.c:53
#define ff_dlog(a,...)
#define av_freep(p)
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
timestamp utils, mostly useful for debugging/logging purposes
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:54
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:76
static av_always_inline int diff(const uint32_t a, const uint32_t b)
static double c[64]