FFmpeg  4.3.6
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 {
54  int done;
56  int64_t last_pts;
57 } MovieStream;
58 
59 typedef struct MovieContext {
60  /* common A/V fields */
61  const AVClass *class;
62  int64_t seek_point; ///< seekpoint in microseconds
63  double seek_point_d;
64  char *format_name;
65  char *file_name;
66  char *stream_specs; /**< user-provided list of streams, separated by + */
67  int stream_index; /**< for compatibility */
70  int64_t ts_offset;
71 
73  int eof;
75 
76  int max_stream_index; /**< max stream # actually used for output */
77  MovieStream *st; /**< array of all streams, one per output */
78  int *out_index; /**< stream number -> output number map, or -1 */
79 } MovieContext;
80 
81 #define OFFSET(x) offsetof(MovieContext, x)
82 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
83 
84 static const AVOption movie_options[]= {
85  { "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
86  { "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
87  { "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
88  { "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
89  { "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
90  { "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
91  { "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
92  { "streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
93  { "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
94  { "loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, FLAGS },
95  { "discontinuity", "set discontinuity threshold", OFFSET(discontinuity_threshold), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
96  { NULL },
97 };
98 
99 static int movie_config_output_props(AVFilterLink *outlink);
100 static int movie_request_frame(AVFilterLink *outlink);
101 
102 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
103 {
104  int i, ret, already = 0, stream_id = -1;
105  char type_char[2], dummy;
106  AVStream *found = NULL;
107  enum AVMediaType type;
108 
109  ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
110  if (ret >= 1 && ret <= 2) {
111  type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
112  ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
113  if (ret < 0) {
114  av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
115  av_get_media_type_string(type), stream_id);
116  return NULL;
117  }
118  return avf->streams[ret];
119  }
120  for (i = 0; i < avf->nb_streams; i++) {
121  ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
122  if (ret < 0) {
123  av_log(log, AV_LOG_ERROR,
124  "Invalid stream specifier \"%s\"\n", spec);
125  return NULL;
126  }
127  if (!ret)
128  continue;
129  if (avf->streams[i]->discard != AVDISCARD_ALL) {
130  already++;
131  continue;
132  }
133  if (found) {
134  av_log(log, AV_LOG_WARNING,
135  "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
136  break;
137  }
138  found = avf->streams[i];
139  }
140  if (!found) {
141  av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
142  already ? "matched only already used streams" :
143  "did not match any stream");
144  return NULL;
145  }
146  if (found->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
148  av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
149  "currently unsupported by libavfilter\n", spec,
151  return NULL;
152  }
153  return found;
154 }
155 
157 {
158  AVCodec *codec;
159  int ret;
160 
161  codec = avcodec_find_decoder(st->st->codecpar->codec_id);
162  if (!codec) {
163  av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
164  return AVERROR(EINVAL);
165  }
166 
167  st->codec_ctx = avcodec_alloc_context3(codec);
168  if (!st->codec_ctx)
169  return AVERROR(ENOMEM);
170 
172  if (ret < 0)
173  return ret;
174 
175  st->codec_ctx->refcounted_frames = 1;
177 
178  if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
179  av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
180  return ret;
181  }
182 
183  return 0;
184 }
185 
186 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
187 {
188  AVCodecParameters *dec_par = st->st->codecpar;
189  char buf[256];
190  int64_t chl = av_get_default_channel_layout(dec_par->channels);
191 
192  if (!chl) {
193  av_log(log_ctx, AV_LOG_ERROR,
194  "Channel layout is not set in stream %d, and could not "
195  "be guessed from the number of channels (%d)\n",
196  st_index, dec_par->channels);
197  return AVERROR(EINVAL);
198  }
199 
200  av_get_channel_layout_string(buf, sizeof(buf), dec_par->channels, chl);
201  av_log(log_ctx, AV_LOG_WARNING,
202  "Channel layout is not set in output stream %d, "
203  "guessed channel layout is '%s'\n",
204  st_index, buf);
205  dec_par->channel_layout = chl;
206  return 0;
207 }
208 
210 {
211  MovieContext *movie = ctx->priv;
213  int64_t timestamp;
214  int nb_streams = 1, ret, i;
215  char default_streams[16], *stream_specs, *spec, *cursor;
216  char name[16];
217  AVStream *st;
218 
219  if (!movie->file_name) {
220  av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
221  return AVERROR(EINVAL);
222  }
223 
224  movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
225 
226  stream_specs = movie->stream_specs;
227  if (!stream_specs) {
228  snprintf(default_streams, sizeof(default_streams), "d%c%d",
229  !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
230  movie->stream_index);
231  stream_specs = default_streams;
232  }
233  for (cursor = stream_specs; *cursor; cursor++)
234  if (*cursor == '+')
235  nb_streams++;
236 
237  if (movie->loop_count != 1 && nb_streams != 1) {
238  av_log(ctx, AV_LOG_ERROR,
239  "Loop with several streams is currently unsupported\n");
240  return AVERROR_PATCHWELCOME;
241  }
242 
243  // Try to find the movie format (container)
244  iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
245 
246  movie->format_ctx = NULL;
247  if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
248  av_log(ctx, AV_LOG_ERROR,
249  "Failed to avformat_open_input '%s'\n", movie->file_name);
250  return ret;
251  }
252  if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
253  av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
254 
255  // if seeking requested, we execute it
256  if (movie->seek_point > 0) {
257  timestamp = movie->seek_point;
258  // add the stream start time, should it exist
259  if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
260  if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
261  av_log(ctx, AV_LOG_ERROR,
262  "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
263  movie->file_name, movie->format_ctx->start_time, movie->seek_point);
264  return AVERROR(EINVAL);
265  }
266  timestamp += movie->format_ctx->start_time;
267  }
268  if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
269  av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
270  movie->file_name, timestamp);
271  return ret;
272  }
273  }
274 
275  for (i = 0; i < movie->format_ctx->nb_streams; i++)
276  movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
277 
278  movie->st = av_calloc(nb_streams, sizeof(*movie->st));
279  if (!movie->st)
280  return AVERROR(ENOMEM);
281 
282  for (i = 0; i < nb_streams; i++) {
283  spec = av_strtok(stream_specs, "+", &cursor);
284  if (!spec)
285  return AVERROR_BUG;
286  stream_specs = NULL; /* for next strtok */
287  st = find_stream(ctx, movie->format_ctx, spec);
288  if (!st)
289  return AVERROR(EINVAL);
291  movie->st[i].st = st;
292  movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
293  movie->st[i].discontinuity_threshold =
295  }
296  if (av_strtok(NULL, "+", &cursor))
297  return AVERROR_BUG;
298 
299  movie->out_index = av_calloc(movie->max_stream_index + 1,
300  sizeof(*movie->out_index));
301  if (!movie->out_index)
302  return AVERROR(ENOMEM);
303  for (i = 0; i <= movie->max_stream_index; i++)
304  movie->out_index[i] = -1;
305  for (i = 0; i < nb_streams; i++) {
306  AVFilterPad pad = { 0 };
307  movie->out_index[movie->st[i].st->index] = i;
308  snprintf(name, sizeof(name), "out%d", i);
309  pad.type = movie->st[i].st->codecpar->codec_type;
310  pad.name = av_strdup(name);
311  if (!pad.name)
312  return AVERROR(ENOMEM);
315  if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) {
316  av_freep(&pad.name);
317  return ret;
318  }
319  if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
320  !movie->st[i].st->codecpar->channel_layout) {
321  ret = guess_channel_layout(&movie->st[i], i, ctx);
322  if (ret < 0)
323  return ret;
324  }
325  ret = open_stream(ctx, &movie->st[i]);
326  if (ret < 0)
327  return ret;
328  }
329 
330  av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
331  movie->seek_point, movie->format_name, movie->file_name,
332  movie->stream_index);
333 
334  return 0;
335 }
336 
338 {
339  MovieContext *movie = ctx->priv;
340  int i;
341 
342  for (i = 0; i < ctx->nb_outputs; i++) {
343  av_freep(&ctx->output_pads[i].name);
344  if (movie->st[i].st)
345  avcodec_free_context(&movie->st[i].codec_ctx);
346  }
347  av_freep(&movie->st);
348  av_freep(&movie->out_index);
349  if (movie->format_ctx)
351 }
352 
354 {
355  MovieContext *movie = ctx->priv;
356  int list[] = { 0, -1 };
357  int64_t list64[] = { 0, -1 };
358  int i, ret;
359 
360  for (i = 0; i < ctx->nb_outputs; i++) {
361  MovieStream *st = &movie->st[i];
362  AVCodecParameters *c = st->st->codecpar;
363  AVFilterLink *outlink = ctx->outputs[i];
364 
365  switch (c->codec_type) {
366  case AVMEDIA_TYPE_VIDEO:
367  list[0] = c->format;
368  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
369  return ret;
370  break;
371  case AVMEDIA_TYPE_AUDIO:
372  list[0] = c->format;
373  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
374  return ret;
375  list[0] = c->sample_rate;
376  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates)) < 0)
377  return ret;
378  list64[0] = c->channel_layout;
380  &outlink->in_channel_layouts)) < 0)
381  return ret;
382  break;
383  }
384  }
385 
386  return 0;
387 }
388 
390 {
391  AVFilterContext *ctx = outlink->src;
392  MovieContext *movie = ctx->priv;
393  unsigned out_id = FF_OUTLINK_IDX(outlink);
394  MovieStream *st = &movie->st[out_id];
395  AVCodecParameters *c = st->st->codecpar;
396 
397  outlink->time_base = st->st->time_base;
398 
399  switch (c->codec_type) {
400  case AVMEDIA_TYPE_VIDEO:
401  outlink->w = c->width;
402  outlink->h = c->height;
403  outlink->frame_rate = st->st->r_frame_rate;
404  break;
405  case AVMEDIA_TYPE_AUDIO:
406  break;
407  }
408 
409  return 0;
410 }
411 
412 static char *describe_frame_to_str(char *dst, size_t dst_size,
414  AVFilterLink *link)
415 {
416  switch (frame_type) {
417  case AVMEDIA_TYPE_VIDEO:
418  snprintf(dst, dst_size,
419  "video pts:%s time:%s size:%dx%d aspect:%d/%d",
420  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
421  frame->width, frame->height,
422  frame->sample_aspect_ratio.num,
423  frame->sample_aspect_ratio.den);
424  break;
425  case AVMEDIA_TYPE_AUDIO:
426  snprintf(dst, dst_size,
427  "audio pts:%s time:%s samples:%d",
428  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
429  frame->nb_samples);
430  break;
431  default:
432  snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type));
433  break;
434  }
435  return dst;
436 }
437 
439 {
440  MovieContext *movie = ctx->priv;
441  int64_t timestamp = movie->seek_point;
442  int ret, i;
443 
444  if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
445  timestamp += movie->format_ctx->start_time;
446  ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
447  if (ret < 0) {
448  av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
449  movie->loop_count = 1; /* do not try again */
450  return ret;
451  }
452 
453  for (i = 0; i < ctx->nb_outputs; i++) {
455  movie->st[i].done = 0;
456  }
457  movie->eof = 0;
458  return 0;
459 }
460 
461 /**
462  * Try to push a frame to the requested output.
463  *
464  * @param ctx filter context
465  * @param out_id number of output where a frame is wanted;
466  * if the frame is read from file, used to set the return value;
467  * if the codec is being flushed, flush the corresponding stream
468  * @return 1 if a frame was pushed on the requested output,
469  * 0 if another attempt is possible,
470  * <0 AVERROR code
471  */
472 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
473 {
474  MovieContext *movie = ctx->priv;
475  AVPacket *pkt = &movie->pkt;
476  enum AVMediaType frame_type;
477  MovieStream *st;
478  int ret, got_frame = 0, pkt_out_id;
479  AVFilterLink *outlink;
480  AVFrame *frame;
481 
482  if (!pkt->size) {
483  if (movie->eof) {
484  if (movie->st[out_id].done) {
485  if (movie->loop_count != 1) {
486  ret = rewind_file(ctx);
487  if (ret < 0)
488  return ret;
489  movie->loop_count -= movie->loop_count > 1;
490  av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
491  return 0; /* retry */
492  }
493  return AVERROR_EOF;
494  }
495  pkt->stream_index = movie->st[out_id].st->index;
496  /* packet is already ready for flushing */
497  } else {
498  ret = av_read_frame(movie->format_ctx, &movie->pkt0);
499  if (ret < 0) {
500  av_init_packet(&movie->pkt0); /* ready for flushing */
501  *pkt = movie->pkt0;
502  if (ret == AVERROR_EOF) {
503  movie->eof = 1;
504  return 0; /* start flushing */
505  }
506  return ret;
507  }
508  *pkt = movie->pkt0;
509  }
510  }
511 
512  pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
513  movie->out_index[pkt->stream_index];
514  if (pkt_out_id < 0) {
515  av_packet_unref(&movie->pkt0);
516  pkt->size = 0; /* ready for next run */
517  pkt->data = NULL;
518  return 0;
519  }
520  st = &movie->st[pkt_out_id];
521  outlink = ctx->outputs[pkt_out_id];
522 
523  frame = av_frame_alloc();
524  if (!frame)
525  return AVERROR(ENOMEM);
526 
527  frame_type = st->st->codecpar->codec_type;
528  switch (frame_type) {
529  case AVMEDIA_TYPE_VIDEO:
530  ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
531  break;
532  case AVMEDIA_TYPE_AUDIO:
533  ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
534  break;
535  default:
536  ret = AVERROR(ENOSYS);
537  break;
538  }
539  if (ret < 0) {
540  av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
541  av_frame_free(&frame);
542  av_packet_unref(&movie->pkt0);
543  movie->pkt.size = 0;
544  movie->pkt.data = NULL;
545  return 0;
546  }
547  if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
548  ret = pkt->size;
549 
550  pkt->data += ret;
551  pkt->size -= ret;
552  if (pkt->size <= 0) {
553  av_packet_unref(&movie->pkt0);
554  pkt->size = 0; /* ready for next run */
555  pkt->data = NULL;
556  }
557  if (!got_frame) {
558  if (!ret)
559  st->done = 1;
560  av_frame_free(&frame);
561  return 0;
562  }
563 
564  frame->pts = frame->best_effort_timestamp;
565  if (frame->pts != AV_NOPTS_VALUE) {
566  if (movie->ts_offset)
567  frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
568  if (st->discontinuity_threshold) {
569  if (st->last_pts != AV_NOPTS_VALUE) {
570  int64_t diff = frame->pts - st->last_pts;
571  if (diff < 0 || diff > st->discontinuity_threshold) {
572  av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
573  movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
574  frame->pts -= diff;
575  }
576  }
577  }
578  st->last_pts = frame->pts;
579  }
580  ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
581  describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));
582 
583  if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
584  if (frame->format != outlink->format) {
585  av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
586  av_get_pix_fmt_name(outlink->format),
588  );
589  av_frame_free(&frame);
590  return 0;
591  }
592  }
593  ret = ff_filter_frame(outlink, frame);
594 
595  if (ret < 0)
596  return ret;
597  return pkt_out_id == out_id;
598 }
599 
600 static int movie_request_frame(AVFilterLink *outlink)
601 {
602  AVFilterContext *ctx = outlink->src;
603  unsigned out_id = FF_OUTLINK_IDX(outlink);
604  int ret;
605 
606  while (1) {
607  ret = movie_push_frame(ctx, out_id);
608  if (ret)
609  return FFMIN(ret, 0);
610  }
611 }
612 
613 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
614  char *res, int res_len, int flags)
615 {
616  MovieContext *movie = ctx->priv;
617  int ret = AVERROR(ENOSYS);
618 
619  if (!strcmp(cmd, "seek")) {
620  int idx, flags, i;
621  int64_t ts;
622  char tail[2];
623 
624  if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
625  return AVERROR(EINVAL);
626 
627  ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
628  if (ret < 0)
629  return ret;
630 
631  for (i = 0; i < ctx->nb_outputs; i++) {
633  movie->st[i].done = 0;
634  }
635  return ret;
636  } else if (!strcmp(cmd, "get_duration")) {
637  int print_len;
638  char tail[2];
639 
640  if (!res || res_len <= 0)
641  return AVERROR(EINVAL);
642 
643  if (args && sscanf(args, "%1s", tail) == 1)
644  return AVERROR(EINVAL);
645 
646  print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
647  if (print_len < 0 || print_len >= res_len)
648  return AVERROR(EINVAL);
649 
650  return 0;
651  }
652 
653  return ret;
654 }
655 
656 #if CONFIG_MOVIE_FILTER
657 
658 AVFILTER_DEFINE_CLASS(movie);
659 
661  .name = "movie",
662  .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
663  .priv_size = sizeof(MovieContext),
664  .priv_class = &movie_class,
666  .uninit = movie_uninit,
668 
669  .inputs = NULL,
670  .outputs = NULL,
673 };
674 
675 #endif /* CONFIG_MOVIE_FILTER */
676 
677 #if CONFIG_AMOVIE_FILTER
678 
679 #define amovie_options movie_options
680 AVFILTER_DEFINE_CLASS(amovie);
681 
683  .name = "amovie",
684  .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
685  .priv_size = sizeof(MovieContext),
687  .uninit = movie_uninit,
689 
690  .inputs = NULL,
691  .outputs = NULL,
692  .priv_class = &amovie_class,
695 };
696 
697 #endif /* CONFIG_AMOVIE_FILTER */
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2512
#define NULL
Definition: coverity.c:32
static AVStream * find_stream(void *log, AVFormatContext *avf, const char *spec)
Definition: src_movie.c:102
int64_t discontinuity_threshold
Definition: src_movie.c:55
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVOption.
Definition: opt.h:246
int64_t ts_offset
Definition: src_movie.c:70
static av_cold void movie_uninit(AVFilterContext *ctx)
Definition: src_movie.c:337
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
Main libavfilter public API header.
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVStream * st
Definition: src_movie.c:52
int64_t last_pts
Definition: src_movie.c:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: packet.h:356
static const AVOption movie_options[]
Definition: src_movie.c:84
attribute_deprecated int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt)
Decode the audio frame of size avpkt->size from avpkt->data into frame.
Definition: decode.c:813
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:536
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
#define FF_OUTLINK_IDX(link)
Definition: internal.h:329
discard all
Definition: avcodec.h:236
static AVPacket pkt
char * stream_specs
user-provided list of streams, separated by +
Definition: src_movie.c:66
AVCodec.
Definition: codec.h:190
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
char * file_name
Definition: src_movie.c:65
Macro definitions for various function/variable attributes.
AVPacket pkt0
Definition: src_movie.c:74
frame_type
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:300
Format I/O context.
Definition: avformat.h:1351
double seek_point_d
Definition: src_movie.c:63
const char * name
Pad name.
Definition: internal.h:60
static int open_stream(AVFilterContext *ctx, MovieStream *st)
Definition: src_movie.c:156
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:479
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:349
Round toward +infinity.
Definition: mathematics.h:83
static int nb_streams
Definition: ffprobe.c:282
#define av_cold
Definition: attributes.h:88
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
int width
Video only.
Definition: codec_par.h:126
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:279
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
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:5329
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
Definition: utils.c:2190
static AVFrame * frame
uint8_t * data
Definition: packet.h:355
#define ff_dlog(a,...)
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:111
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
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
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:4251
AVFilter ff_avsrc_amovie
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
int width
Definition: frame.h:358
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#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
#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
unsigned nb_outputs
number of output pads
Definition: avfilter.h:351
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
void * priv
private data for use by the filter
Definition: avfilter.h:353
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
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
simple assert() macros that are a bit more flexible than ISO C assert().
#define FFMAX(a, b)
Definition: common.h:94
static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
Definition: src_movie.c:186
#define FLAGS
Definition: src_movie.c:82
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
const char * name
Definition: qsvenc.c:46
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:118
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:784
#define FFMIN(a, b)
Definition: common.h:96
int64_t discontinuity_threshold
Definition: src_movie.c:69
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
Definition: options.c:157
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:484
int loop_count
Definition: src_movie.c:68
#define av_err2str(errnum)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: error.h:119
AVFormatContext * ctx
Definition: movenc.c:48
static int movie_config_output_props(AVFilterLink *outlink)
Definition: src_movie.c:389
char * format_name
Definition: src_movie.c:64
int dummy
Definition: motion.c:64
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
int max_stream_index
max stream # actually used for output
Definition: src_movie.c:76
static av_cold int movie_common_init(AVFilterContext *ctx)
Definition: src_movie.c:209
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
int thread_count
thread count is used to decide how many independent tasks should be passed to execute() ...
Definition: avcodec.h:1785
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.
Stream structure.
Definition: avformat.h:876
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal codec state / flush internal buffers.
Definition: utils.c:1086
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:373
int * out_index
stream number -> output number map, or -1
Definition: src_movie.c:78
static AVInputFormat * iformat
Definition: ffprobe.c:259
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
Libavcodec external API header.
AVFilterChannelLayouts * avfilter_make_format64_list(const int64_t *fmts)
Definition: formats.c:320
attribute_deprecated int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt)
Decode the video frame of size avpkt->size from avpkt->data into picture.
Definition: decode.c:806
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:172
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
main external API structure.
Definition: avcodec.h:526
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:605
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: src_movie.c:613
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:388
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
int64_t seek_point
seekpoint in microseconds
Definition: src_movie.c:62
static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
Try to push a frame to the requested output.
Definition: src_movie.c:472
cl_device_type type
AVMediaType
Definition: avutil.h:199
discard useless packets like 0 size packets in avi
Definition: avcodec.h:231
const char * name
Filter name.
Definition: avfilter.h:148
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:571
#define snprintf
Definition: snprintf.h:34
int64_t best_effort_timestamp
frame timestamp estimated using various heuristics, in stream time base
Definition: frame.h:564
AVFilter ff_avsrc_movie
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1780
attribute_deprecated int refcounted_frames
If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_dec...
Definition: avcodec.h:1357
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: allcodecs.c:919
static char * describe_frame_to_str(char *dst, size_t dst_size, AVFrame *frame, enum AVMediaType frame_type, AVFilterLink *link)
Definition: src_movie.c:412
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:76
#define flags(name, subs,...)
Definition: cbs_av1.c:565
static int format_name(const char *buf, char **s, int index, const char *varname)
Definition: hlsenc.c:1827
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1456
int stream_index
for compatibility
Definition: src_movie.c:67
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2527
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:184
int sample_rate
Audio only.
Definition: codec_par.h:170
#define OFFSET(x)
Definition: src_movie.c:81
static int movie_request_frame(AVFilterLink *outlink)
Definition: src_movie.c:600
Main libavformat public API header.
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3622
static double c[64]
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:35
int den
Denominator.
Definition: rational.h:60
AVPacket pkt
Definition: src_movie.c:74
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:4498
static int movie_query_formats(AVFilterContext *ctx)
Definition: src_movie.c:353
static av_always_inline int diff(const uint32_t a, const uint32_t b)
#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 AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:314
static int rewind_file(AVFilterContext *ctx)
Definition: src_movie.c:438
AVCodecContext * codec_ctx
Definition: src_movie.c:53
AVFormatContext * format_ctx
Definition: src_movie.c:72
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:102
int channels
Audio only.
Definition: codec_par.h:166
An instance of a filter.
Definition: avfilter.h:338
int64_t av_get_default_channel_layout(int nb_channels)
Return default channel layout for a given number of channels.
int64_t duration
Duration of the stream, in AV_TIME_BASE fractional seconds.
Definition: avformat.h:1466
int height
Definition: frame.h:358
#define av_freep(p)
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
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
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:2465
int stream_index
Definition: packet.h:357
internal API functions
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:931
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1000
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:274
This structure stores compressed data.
Definition: packet.h:332
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:366
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
for(j=16;j >0;--j)
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
MovieStream * st
array of all streams, one per output
Definition: src_movie.c:77