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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}, CHAR_MAX, CHAR_MAX, FLAGS },
93  { "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX, 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 
156 static int open_stream(void *log, MovieStream *st)
157 {
158  AVCodec *codec;
159  int ret;
160 
161  codec = avcodec_find_decoder(st->st->codecpar->codec_id);
162  if (!codec) {
163  av_log(log, 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;
176 
177  if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
178  av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
179  return ret;
180  }
181 
182  return 0;
183 }
184 
185 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
186 {
187  AVCodecParameters *dec_par = st->st->codecpar;
188  char buf[256];
189  int64_t chl = av_get_default_channel_layout(dec_par->channels);
190 
191  if (!chl) {
192  av_log(log_ctx, AV_LOG_ERROR,
193  "Channel layout is not set in stream %d, and could not "
194  "be guessed from the number of channels (%d)\n",
195  st_index, dec_par->channels);
196  return AVERROR(EINVAL);
197  }
198 
199  av_get_channel_layout_string(buf, sizeof(buf), dec_par->channels, chl);
200  av_log(log_ctx, AV_LOG_WARNING,
201  "Channel layout is not set in output stream %d, "
202  "guessed channel layout is '%s'\n",
203  st_index, buf);
204  dec_par->channel_layout = chl;
205  return 0;
206 }
207 
209 {
210  MovieContext *movie = ctx->priv;
212  int64_t timestamp;
213  int nb_streams = 1, ret, i;
214  char default_streams[16], *stream_specs, *spec, *cursor;
215  char name[16];
216  AVStream *st;
217 
218  if (!movie->file_name) {
219  av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
220  return AVERROR(EINVAL);
221  }
222 
223  movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
224 
225  stream_specs = movie->stream_specs;
226  if (!stream_specs) {
227  snprintf(default_streams, sizeof(default_streams), "d%c%d",
228  !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
229  movie->stream_index);
230  stream_specs = default_streams;
231  }
232  for (cursor = stream_specs; *cursor; cursor++)
233  if (*cursor == '+')
234  nb_streams++;
235 
236  if (movie->loop_count != 1 && nb_streams != 1) {
237  av_log(ctx, AV_LOG_ERROR,
238  "Loop with several streams is currently unsupported\n");
239  return AVERROR_PATCHWELCOME;
240  }
241 
242  av_register_all();
243 
244  // Try to find the movie format (container)
245  iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
246 
247  movie->format_ctx = NULL;
248  if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
249  av_log(ctx, AV_LOG_ERROR,
250  "Failed to avformat_open_input '%s'\n", movie->file_name);
251  return ret;
252  }
253  if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
254  av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
255 
256  // if seeking requested, we execute it
257  if (movie->seek_point > 0) {
258  timestamp = movie->seek_point;
259  // add the stream start time, should it exist
260  if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
261  if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
262  av_log(ctx, AV_LOG_ERROR,
263  "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
264  movie->file_name, movie->format_ctx->start_time, movie->seek_point);
265  return AVERROR(EINVAL);
266  }
267  timestamp += movie->format_ctx->start_time;
268  }
269  if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
270  av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
271  movie->file_name, timestamp);
272  return ret;
273  }
274  }
275 
276  for (i = 0; i < movie->format_ctx->nb_streams; i++)
277  movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
278 
279  movie->st = av_calloc(nb_streams, sizeof(*movie->st));
280  if (!movie->st)
281  return AVERROR(ENOMEM);
282 
283  for (i = 0; i < nb_streams; i++) {
284  spec = av_strtok(stream_specs, "+", &cursor);
285  if (!spec)
286  return AVERROR_BUG;
287  stream_specs = NULL; /* for next strtok */
288  st = find_stream(ctx, movie->format_ctx, spec);
289  if (!st)
290  return AVERROR(EINVAL);
292  movie->st[i].st = st;
293  movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
294  movie->st[i].discontinuity_threshold =
296  }
297  if (av_strtok(NULL, "+", &cursor))
298  return AVERROR_BUG;
299 
300  movie->out_index = av_calloc(movie->max_stream_index + 1,
301  sizeof(*movie->out_index));
302  if (!movie->out_index)
303  return AVERROR(ENOMEM);
304  for (i = 0; i <= movie->max_stream_index; i++)
305  movie->out_index[i] = -1;
306  for (i = 0; i < nb_streams; i++) {
307  AVFilterPad pad = { 0 };
308  movie->out_index[movie->st[i].st->index] = i;
309  snprintf(name, sizeof(name), "out%d", i);
310  pad.type = movie->st[i].st->codecpar->codec_type;
311  pad.name = av_strdup(name);
312  if (!pad.name)
313  return AVERROR(ENOMEM);
316  ff_insert_outpad(ctx, i, &pad);
317  if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
318  !movie->st[i].st->codecpar->channel_layout) {
319  ret = guess_channel_layout(&movie->st[i], i, ctx);
320  if (ret < 0)
321  return ret;
322  }
323  ret = open_stream(ctx, &movie->st[i]);
324  if (ret < 0)
325  return ret;
326  }
327 
328  av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
329  movie->seek_point, movie->format_name, movie->file_name,
330  movie->stream_index);
331 
332  return 0;
333 }
334 
336 {
337  MovieContext *movie = ctx->priv;
338  int i;
339 
340  for (i = 0; i < ctx->nb_outputs; i++) {
341  av_freep(&ctx->output_pads[i].name);
342  if (movie->st[i].st)
343  avcodec_free_context(&movie->st[i].codec_ctx);
344  }
345  av_freep(&movie->st);
346  av_freep(&movie->out_index);
347  if (movie->format_ctx)
349 }
350 
352 {
353  MovieContext *movie = ctx->priv;
354  int list[] = { 0, -1 };
355  int64_t list64[] = { 0, -1 };
356  int i, ret;
357 
358  for (i = 0; i < ctx->nb_outputs; i++) {
359  MovieStream *st = &movie->st[i];
360  AVCodecParameters *c = st->st->codecpar;
361  AVFilterLink *outlink = ctx->outputs[i];
362 
363  switch (c->codec_type) {
364  case AVMEDIA_TYPE_VIDEO:
365  list[0] = c->format;
366  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
367  return ret;
368  break;
369  case AVMEDIA_TYPE_AUDIO:
370  list[0] = c->format;
371  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_formats)) < 0)
372  return ret;
373  list[0] = c->sample_rate;
374  if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates)) < 0)
375  return ret;
376  list64[0] = c->channel_layout;
378  &outlink->in_channel_layouts)) < 0)
379  return ret;
380  break;
381  }
382  }
383 
384  return 0;
385 }
386 
388 {
389  AVFilterContext *ctx = outlink->src;
390  MovieContext *movie = ctx->priv;
391  unsigned out_id = FF_OUTLINK_IDX(outlink);
392  MovieStream *st = &movie->st[out_id];
393  AVCodecParameters *c = st->st->codecpar;
394 
395  outlink->time_base = st->st->time_base;
396 
397  switch (c->codec_type) {
398  case AVMEDIA_TYPE_VIDEO:
399  outlink->w = c->width;
400  outlink->h = c->height;
401  outlink->frame_rate = st->st->r_frame_rate;
402  break;
403  case AVMEDIA_TYPE_AUDIO:
404  break;
405  }
406 
407  return 0;
408 }
409 
410 static char *describe_frame_to_str(char *dst, size_t dst_size,
411  AVFrame *frame, enum AVMediaType frame_type,
412  AVFilterLink *link)
413 {
414  switch (frame_type) {
415  case AVMEDIA_TYPE_VIDEO:
416  snprintf(dst, dst_size,
417  "video pts:%s time:%s size:%dx%d aspect:%d/%d",
418  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
419  frame->width, frame->height,
420  frame->sample_aspect_ratio.num,
421  frame->sample_aspect_ratio.den);
422  break;
423  case AVMEDIA_TYPE_AUDIO:
424  snprintf(dst, dst_size,
425  "audio pts:%s time:%s samples:%d",
426  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
427  frame->nb_samples);
428  break;
429  default:
430  snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type));
431  break;
432  }
433  return dst;
434 }
435 
437 {
438  MovieContext *movie = ctx->priv;
439  int64_t timestamp = movie->seek_point;
440  int ret, i;
441 
442  if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
443  timestamp += movie->format_ctx->start_time;
444  ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
445  if (ret < 0) {
446  av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
447  movie->loop_count = 1; /* do not try again */
448  return ret;
449  }
450 
451  for (i = 0; i < ctx->nb_outputs; i++) {
453  movie->st[i].done = 0;
454  }
455  movie->eof = 0;
456  return 0;
457 }
458 
459 /**
460  * Try to push a frame to the requested output.
461  *
462  * @param ctx filter context
463  * @param out_id number of output where a frame is wanted;
464  * if the frame is read from file, used to set the return value;
465  * if the codec is being flushed, flush the corresponding stream
466  * @return 1 if a frame was pushed on the requested output,
467  * 0 if another attempt is possible,
468  * <0 AVERROR code
469  */
470 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
471 {
472  MovieContext *movie = ctx->priv;
473  AVPacket *pkt = &movie->pkt;
474  enum AVMediaType frame_type;
475  MovieStream *st;
476  int ret, got_frame = 0, pkt_out_id;
477  AVFilterLink *outlink;
478  AVFrame *frame;
479 
480  if (!pkt->size) {
481  if (movie->eof) {
482  if (movie->st[out_id].done) {
483  if (movie->loop_count != 1) {
484  ret = rewind_file(ctx);
485  if (ret < 0)
486  return ret;
487  movie->loop_count -= movie->loop_count > 1;
488  av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
489  return 0; /* retry */
490  }
491  return AVERROR_EOF;
492  }
493  pkt->stream_index = movie->st[out_id].st->index;
494  /* packet is already ready for flushing */
495  } else {
496  ret = av_read_frame(movie->format_ctx, &movie->pkt0);
497  if (ret < 0) {
498  av_init_packet(&movie->pkt0); /* ready for flushing */
499  *pkt = movie->pkt0;
500  if (ret == AVERROR_EOF) {
501  movie->eof = 1;
502  return 0; /* start flushing */
503  }
504  return ret;
505  }
506  *pkt = movie->pkt0;
507  }
508  }
509 
510  pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
511  movie->out_index[pkt->stream_index];
512  if (pkt_out_id < 0) {
513  av_packet_unref(&movie->pkt0);
514  pkt->size = 0; /* ready for next run */
515  pkt->data = NULL;
516  return 0;
517  }
518  st = &movie->st[pkt_out_id];
519  outlink = ctx->outputs[pkt_out_id];
520 
521  frame = av_frame_alloc();
522  if (!frame)
523  return AVERROR(ENOMEM);
524 
525  frame_type = st->st->codecpar->codec_type;
526  switch (frame_type) {
527  case AVMEDIA_TYPE_VIDEO:
528  ret = avcodec_decode_video2(st->codec_ctx, frame, &got_frame, pkt);
529  break;
530  case AVMEDIA_TYPE_AUDIO:
531  ret = avcodec_decode_audio4(st->codec_ctx, frame, &got_frame, pkt);
532  break;
533  default:
534  ret = AVERROR(ENOSYS);
535  break;
536  }
537  if (ret < 0) {
538  av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
539  av_frame_free(&frame);
540  av_packet_unref(&movie->pkt0);
541  movie->pkt.size = 0;
542  movie->pkt.data = NULL;
543  return 0;
544  }
545  if (!ret || st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
546  ret = pkt->size;
547 
548  pkt->data += ret;
549  pkt->size -= ret;
550  if (pkt->size <= 0) {
551  av_packet_unref(&movie->pkt0);
552  pkt->size = 0; /* ready for next run */
553  pkt->data = NULL;
554  }
555  if (!got_frame) {
556  if (!ret)
557  st->done = 1;
558  av_frame_free(&frame);
559  return 0;
560  }
561 
562  frame->pts = frame->best_effort_timestamp;
563  if (frame->pts != AV_NOPTS_VALUE) {
564  if (movie->ts_offset)
565  frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
566  if (st->discontinuity_threshold) {
567  if (st->last_pts != AV_NOPTS_VALUE) {
568  int64_t diff = frame->pts - st->last_pts;
569  if (diff < 0 || diff > st->discontinuity_threshold) {
570  av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", pkt_out_id, diff);
571  movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
572  frame->pts -= diff;
573  }
574  }
575  }
576  st->last_pts = frame->pts;
577  }
578  ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
579  describe_frame_to_str((char[1024]){0}, 1024, frame, frame_type, outlink));
580 
581  if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
582  if (frame->format != outlink->format) {
583  av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n",
584  av_get_pix_fmt_name(outlink->format),
586  );
587  av_frame_free(&frame);
588  return 0;
589  }
590  }
591  ret = ff_filter_frame(outlink, frame);
592 
593  if (ret < 0)
594  return ret;
595  return pkt_out_id == out_id;
596 }
597 
598 static int movie_request_frame(AVFilterLink *outlink)
599 {
600  AVFilterContext *ctx = outlink->src;
601  unsigned out_id = FF_OUTLINK_IDX(outlink);
602  int ret;
603 
604  while (1) {
605  ret = movie_push_frame(ctx, out_id);
606  if (ret)
607  return FFMIN(ret, 0);
608  }
609 }
610 
611 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
612  char *res, int res_len, int flags)
613 {
614  MovieContext *movie = ctx->priv;
615  int ret = AVERROR(ENOSYS);
616 
617  if (!strcmp(cmd, "seek")) {
618  int idx, flags, i;
619  int64_t ts;
620  char tail[2];
621 
622  if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
623  return AVERROR(EINVAL);
624 
625  ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
626  if (ret < 0)
627  return ret;
628 
629  for (i = 0; i < ctx->nb_outputs; i++) {
631  movie->st[i].done = 0;
632  }
633  return ret;
634  } else if (!strcmp(cmd, "get_duration")) {
635  int print_len;
636  char tail[2];
637 
638  if (!res || res_len <= 0)
639  return AVERROR(EINVAL);
640 
641  if (args && sscanf(args, "%1s", tail) == 1)
642  return AVERROR(EINVAL);
643 
644  print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
645  if (print_len < 0 || print_len >= res_len)
646  return AVERROR(EINVAL);
647 
648  return 0;
649  }
650 
651  return ret;
652 }
653 
654 #if CONFIG_MOVIE_FILTER
655 
656 AVFILTER_DEFINE_CLASS(movie);
657 
658 AVFilter ff_avsrc_movie = {
659  .name = "movie",
660  .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
661  .priv_size = sizeof(MovieContext),
662  .priv_class = &movie_class,
664  .uninit = movie_uninit,
666 
667  .inputs = NULL,
668  .outputs = NULL,
671 };
672 
673 #endif /* CONFIG_MOVIE_FILTER */
674 
675 #if CONFIG_AMOVIE_FILTER
676 
677 #define amovie_options movie_options
678 AVFILTER_DEFINE_CLASS(amovie);
679 
680 AVFilter ff_avsrc_amovie = {
681  .name = "amovie",
682  .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
683  .priv_size = sizeof(MovieContext),
685  .uninit = movie_uninit,
687 
688  .inputs = NULL,
689  .outputs = NULL,
690  .priv_class = &amovie_class,
693 };
694 
695 #endif /* CONFIG_AMOVIE_FILTER */
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:2423
#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:193
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:335
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: avcodec.h:4074
int num
Numerator.
Definition: rational.h:59
int index
stream index in AVFormatContext
Definition: avformat.h:890
int size
Definition: avcodec.h:1658
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:778
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
#define FF_OUTLINK_IDX(link)
Definition: internal.h:357
discard all
Definition: avcodec.h:825
static AVPacket pkt
char * stream_specs
user-provided list of streams, separated by +
Definition: src_movie.c:66
AVCodec.
Definition: avcodec.h:3681
This struct describes the properties of an encoded stream.
Definition: avcodec.h:4066
char * file_name
Definition: src_movie.c:65
Macro definitions for various function/variable attributes.
AVPacket pkt0
Definition: src_movie.c:74
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:230
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
Format I/O context.
Definition: avformat.h:1349
double seek_point_d
Definition: src_movie.c:63
const char * name
Pad name.
Definition: internal.h:60
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:435
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1125
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:334
Round toward +infinity.
Definition: mathematics.h:83
static int nb_streams
Definition: ffprobe.c:273
#define av_cold
Definition: attributes.h:82
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:150
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:113
int width
Video only.
Definition: avcodec.h:4140
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:288
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:4947
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:277
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
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:2354
static AVFrame * frame
uint8_t * data
Definition: avcodec.h:1657
static int flags
Definition: log.c:57
#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: avcodec.h:4176
#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:4095
int width
width and height of the video frame
Definition: frame.h:245
#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:163
#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:336
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
void * priv
private data for use by the filter
Definition: avfilter.h:338
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4070
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:185
#define FLAGS
Definition: src_movie.c:82
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1405
AVInputFormat * av_find_input_format(const char *short_name)
Find AVInputFormat based on the short name of the input format.
Definition: format.c:164
#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:440
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:387
char * format_name
Definition: src_movie.c:64
int refcounted_frames
If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_dec...
Definition: avcodec.h:2664
int dummy
Definition: motion.c:64
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
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:208
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:889
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal decoder state / flush internal buffers.
Definition: decode.c:1658
#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:257
int * out_index
stream number -> output number map, or -1
Definition: src_movie.c:78
static AVInputFormat * iformat
Definition: ffprobe.c:250
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:237
Libavcodec external API header.
AVFilterChannelLayouts * avfilter_make_format64_list(const int64_t *fmts)
Definition: formats.c:303
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:771
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:1732
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: utils.c:1275
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:576
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: src_movie.c:611
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:272
void * buf
Definition: avisynth_c.h:690
GLint GLenum type
Definition: opengl_enc.c:105
#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:470
AVMediaType
Definition: avutil.h:199
discard useless packets like 0 size packets in avi
Definition: avcodec.h:820
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:627
#define snprintf
Definition: snprintf.h:34
int64_t best_effort_timestamp
frame timestamp estimated using various heuristics, in stream time base
Definition: frame.h:449
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:335
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1710
static char * describe_frame_to_str(char *dst, size_t dst_size, AVFrame *frame, enum AVMediaType frame_type, AVFilterLink *link)
Definition: src_movie.c:410
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:79
int64_t start_time
Position of the first frame of the component, in AV_TIME_BASE fractional seconds. ...
Definition: avformat.h:1434
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:2446
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: avcodec.h:4184
#define OFFSET(x)
Definition: src_movie.c:81
static int movie_request_frame(AVFilterLink *outlink)
Definition: src_movie.c:598
Main libavformat public API header.
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244
static int open_stream(void *log, MovieStream *st)
Definition: src_movie.c:156
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:3494
static double c[64]
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:33
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:4329
static int movie_query_formats(AVFilterContext *ctx)
Definition: src_movie.c:351
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:342
static int rewind_file(AVFilterContext *ctx)
Definition: src_movie.c:436
AVCodecContext * codec_ctx
Definition: src_movie.c:53
AVFormatContext * format_ctx
Definition: src_movie.c:72
int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:510
int channels
Audio only.
Definition: avcodec.h:4180
An instance of a filter.
Definition: avfilter.h:323
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:1444
int height
Definition: frame.h:245
#define av_freep(p)
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:129
AVCodecParameters * codecpar
Definition: avformat.h:1252
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:2249
int stream_index
Definition: avcodec.h:1659
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:926
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:952
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1108
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:293
This structure stores compressed data.
Definition: avcodec.h:1634
void av_register_all(void)
Initialize libavformat and register all the muxers, demuxers and protocols.
Definition: allformats.c:385
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:250
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:326
for(j=16;j >0;--j)
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
const char * name
Definition: opengl_enc.c:103
MovieStream * st
array of all streams, one per output
Definition: src_movie.c:77