FFmpeg  2.1.1
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 
32 #include "libavutil/attributes.h"
33 #include "libavutil/avstring.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/opt.h"
36 #include "libavutil/imgutils.h"
37 #include "libavutil/timestamp.h"
38 #include "libavformat/avformat.h"
39 #include "audio.h"
40 #include "avcodec.h"
41 #include "avfilter.h"
42 #include "formats.h"
43 #include "internal.h"
44 #include "video.h"
45 
46 typedef struct {
48  int done;
49 } MovieStream;
50 
51 typedef struct {
52  /* common A/V fields */
53  const AVClass *class;
54  int64_t seek_point; ///< seekpoint in microseconds
55  double seek_point_d;
56  char *format_name;
57  char *file_name;
58  char *stream_specs; /**< user-provided list of streams, separated by + */
59  int stream_index; /**< for compatibility */
61 
63  int eof;
65  AVFrame *frame; ///< video frame to store the decoded images in
66 
67  int max_stream_index; /**< max stream # actually used for output */
68  MovieStream *st; /**< array of all streams, one per output */
69  int *out_index; /**< stream number -> output number map, or -1 */
70 } MovieContext;
71 
72 #define OFFSET(x) offsetof(MovieContext, x)
73 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
74 
75 static const AVOption movie_options[]= {
76  { "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
77  { "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
78  { "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
79  { "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
80  { "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
81  { "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
82  { "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
83  { "streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX, FLAGS },
84  { "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX, FLAGS },
85  { "loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, FLAGS },
86  { NULL },
87 };
88 
89 static int movie_config_output_props(AVFilterLink *outlink);
90 static int movie_request_frame(AVFilterLink *outlink);
91 
92 static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
93 {
94  int i, ret, already = 0, stream_id = -1;
95  char type_char[2], dummy;
96  AVStream *found = NULL;
97  enum AVMediaType type;
98 
99  ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
100  if (ret >= 1 && ret <= 2) {
101  type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
102  ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
103  if (ret < 0) {
104  av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
105  av_get_media_type_string(type), stream_id);
106  return NULL;
107  }
108  return avf->streams[ret];
109  }
110  for (i = 0; i < avf->nb_streams; i++) {
111  ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
112  if (ret < 0) {
113  av_log(log, AV_LOG_ERROR,
114  "Invalid stream specifier \"%s\"\n", spec);
115  return NULL;
116  }
117  if (!ret)
118  continue;
119  if (avf->streams[i]->discard != AVDISCARD_ALL) {
120  already++;
121  continue;
122  }
123  if (found) {
124  av_log(log, AV_LOG_WARNING,
125  "Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
126  break;
127  }
128  found = avf->streams[i];
129  }
130  if (!found) {
131  av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
132  already ? "matched only already used streams" :
133  "did not match any stream");
134  return NULL;
135  }
136  if (found->codec->codec_type != AVMEDIA_TYPE_VIDEO &&
137  found->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
138  av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
139  "currently unsupported by libavfilter\n", spec,
141  return NULL;
142  }
143  return found;
144 }
145 
146 static int open_stream(void *log, MovieStream *st)
147 {
148  AVCodec *codec;
149  int ret;
150 
151  codec = avcodec_find_decoder(st->st->codec->codec_id);
152  if (!codec) {
153  av_log(log, AV_LOG_ERROR, "Failed to find any codec\n");
154  return AVERROR(EINVAL);
155  }
156 
157  st->st->codec->refcounted_frames = 1;
158 
159  if ((ret = avcodec_open2(st->st->codec, codec, NULL)) < 0) {
160  av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
161  return ret;
162  }
163 
164  return 0;
165 }
166 
167 static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
168 {
169  AVCodecContext *dec_ctx = st->st->codec;
170  char buf[256];
171  int64_t chl = av_get_default_channel_layout(dec_ctx->channels);
172 
173  if (!chl) {
174  av_log(log_ctx, AV_LOG_ERROR,
175  "Channel layout is not set in stream %d, and could not "
176  "be guessed from the number of channels (%d)\n",
177  st_index, dec_ctx->channels);
178  return AVERROR(EINVAL);
179  }
180 
181  av_get_channel_layout_string(buf, sizeof(buf), dec_ctx->channels, chl);
182  av_log(log_ctx, AV_LOG_WARNING,
183  "Channel layout is not set in output stream %d, "
184  "guessed channel layout is '%s'\n",
185  st_index, buf);
186  dec_ctx->channel_layout = chl;
187  return 0;
188 }
189 
191 {
192  MovieContext *movie = ctx->priv;
193  AVInputFormat *iformat = NULL;
194  int64_t timestamp;
195  int nb_streams, ret, i;
196  char default_streams[16], *stream_specs, *spec, *cursor;
197  char name[16];
198  AVStream *st;
199 
200  if (!movie->file_name) {
201  av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
202  return AVERROR(EINVAL);
203  }
204 
205  movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
206 
207  stream_specs = movie->stream_specs;
208  if (!stream_specs) {
209  snprintf(default_streams, sizeof(default_streams), "d%c%d",
210  !strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
211  movie->stream_index);
212  stream_specs = default_streams;
213  }
214  for (cursor = stream_specs, nb_streams = 1; *cursor; cursor++)
215  if (*cursor == '+')
216  nb_streams++;
217 
218  if (movie->loop_count != 1 && nb_streams != 1) {
219  av_log(ctx, AV_LOG_ERROR,
220  "Loop with several streams is currently unsupported\n");
221  return AVERROR_PATCHWELCOME;
222  }
223 
224  av_register_all();
225 
226  // Try to find the movie format (container)
227  iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
228 
229  movie->format_ctx = NULL;
230  if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
231  av_log(ctx, AV_LOG_ERROR,
232  "Failed to avformat_open_input '%s'\n", movie->file_name);
233  return ret;
234  }
235  if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
236  av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
237 
238  // if seeking requested, we execute it
239  if (movie->seek_point > 0) {
240  timestamp = movie->seek_point;
241  // add the stream start time, should it exist
242  if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
243  if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
244  av_log(ctx, AV_LOG_ERROR,
245  "%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
246  movie->file_name, movie->format_ctx->start_time, movie->seek_point);
247  return AVERROR(EINVAL);
248  }
249  timestamp += movie->format_ctx->start_time;
250  }
251  if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
252  av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
253  movie->file_name, timestamp);
254  return ret;
255  }
256  }
257 
258  for (i = 0; i < movie->format_ctx->nb_streams; i++)
259  movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
260 
261  movie->st = av_calloc(nb_streams, sizeof(*movie->st));
262  if (!movie->st)
263  return AVERROR(ENOMEM);
264 
265  for (i = 0; i < nb_streams; i++) {
266  spec = av_strtok(stream_specs, "+", &cursor);
267  if (!spec)
268  return AVERROR_BUG;
269  stream_specs = NULL; /* for next strtok */
270  st = find_stream(ctx, movie->format_ctx, spec);
271  if (!st)
272  return AVERROR(EINVAL);
274  movie->st[i].st = st;
275  movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
276  }
277  if (av_strtok(NULL, "+", &cursor))
278  return AVERROR_BUG;
279 
280  movie->out_index = av_calloc(movie->max_stream_index + 1,
281  sizeof(*movie->out_index));
282  if (!movie->out_index)
283  return AVERROR(ENOMEM);
284  for (i = 0; i <= movie->max_stream_index; i++)
285  movie->out_index[i] = -1;
286  for (i = 0; i < nb_streams; i++)
287  movie->out_index[movie->st[i].st->index] = i;
288 
289  for (i = 0; i < nb_streams; i++) {
290  AVFilterPad pad = { 0 };
291  snprintf(name, sizeof(name), "out%d", i);
292  pad.type = movie->st[i].st->codec->codec_type;
293  pad.name = av_strdup(name);
296  ff_insert_outpad(ctx, i, &pad);
297  ret = open_stream(ctx, &movie->st[i]);
298  if (ret < 0)
299  return ret;
300  if ( movie->st[i].st->codec->codec->type == AVMEDIA_TYPE_AUDIO &&
301  !movie->st[i].st->codec->channel_layout) {
302  ret = guess_channel_layout(&movie->st[i], i, ctx);
303  if (ret < 0)
304  return ret;
305  }
306  }
307 
308  av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
309  movie->seek_point, movie->format_name, movie->file_name,
310  movie->stream_index);
311 
312  return 0;
313 }
314 
316 {
317  MovieContext *movie = ctx->priv;
318  int i;
319 
320  for (i = 0; i < ctx->nb_outputs; i++) {
321  av_freep(&ctx->output_pads[i].name);
322  if (movie->st[i].st)
323  avcodec_close(movie->st[i].st->codec);
324  }
325  av_freep(&movie->st);
326  av_freep(&movie->out_index);
327  av_frame_free(&movie->frame);
328  if (movie->format_ctx)
330 }
331 
333 {
334  MovieContext *movie = ctx->priv;
335  int list[] = { 0, -1 };
336  int64_t list64[] = { 0, -1 };
337  int i;
338 
339  for (i = 0; i < ctx->nb_outputs; i++) {
340  MovieStream *st = &movie->st[i];
341  AVCodecContext *c = st->st->codec;
342  AVFilterLink *outlink = ctx->outputs[i];
343 
344  switch (c->codec_type) {
345  case AVMEDIA_TYPE_VIDEO:
346  list[0] = c->pix_fmt;
348  break;
349  case AVMEDIA_TYPE_AUDIO:
350  list[0] = c->sample_fmt;
352  list[0] = c->sample_rate;
354  list64[0] = c->channel_layout;
356  &outlink->in_channel_layouts);
357  break;
358  }
359  }
360 
361  return 0;
362 }
363 
365 {
366  AVFilterContext *ctx = outlink->src;
367  MovieContext *movie = ctx->priv;
368  unsigned out_id = FF_OUTLINK_IDX(outlink);
369  MovieStream *st = &movie->st[out_id];
370  AVCodecContext *c = st->st->codec;
371 
372  outlink->time_base = st->st->time_base;
373 
374  switch (c->codec_type) {
375  case AVMEDIA_TYPE_VIDEO:
376  outlink->w = c->width;
377  outlink->h = c->height;
378  outlink->frame_rate = st->st->r_frame_rate;
379  break;
380  case AVMEDIA_TYPE_AUDIO:
381  break;
382  }
383 
384  return 0;
385 }
386 
387 static char *describe_frame_to_str(char *dst, size_t dst_size,
388  AVFrame *frame,
389  AVFilterLink *link)
390 {
391  switch (frame->type) {
392  case AVMEDIA_TYPE_VIDEO:
393  snprintf(dst, dst_size,
394  "video pts:%s time:%s size:%dx%d aspect:%d/%d",
395  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
396  frame->width, frame->height,
397  frame->sample_aspect_ratio.num,
398  frame->sample_aspect_ratio.den);
399  break;
400  case AVMEDIA_TYPE_AUDIO:
401  snprintf(dst, dst_size,
402  "audio pts:%s time:%s samples:%d",
403  av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base),
404  frame->nb_samples);
405  break;
406  default:
407  snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame->type));
408  break;
409  }
410  return dst;
411 }
412 
413 #define describe_frameref(f, link) \
414  describe_frame_to_str((char[1024]){0}, 1024, f, link)
415 
416 static int rewind_file(AVFilterContext *ctx)
417 {
418  MovieContext *movie = ctx->priv;
419  int64_t timestamp = movie->seek_point;
420  int ret, i;
421 
422  if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
423  timestamp += movie->format_ctx->start_time;
424  ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
425  if (ret < 0) {
426  av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
427  movie->loop_count = 1; /* do not try again */
428  return ret;
429  }
430 
431  for (i = 0; i < ctx->nb_outputs; i++) {
432  avcodec_flush_buffers(movie->st[i].st->codec);
433  movie->st[i].done = 0;
434  }
435  movie->eof = 0;
436  return 0;
437 }
438 
439 /**
440  * Try to push a frame to the requested output.
441  *
442  * @param ctx filter context
443  * @param out_id number of output where a frame is wanted;
444  * if the frame is read from file, used to set the return value;
445  * if the codec is being flushed, flush the corresponding stream
446  * @return 1 if a frame was pushed on the requested output,
447  * 0 if another attempt is possible,
448  * <0 AVERROR code
449  */
450 static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
451 {
452  MovieContext *movie = ctx->priv;
453  AVPacket *pkt = &movie->pkt;
454  MovieStream *st;
455  int ret, got_frame = 0, pkt_out_id;
456  AVFilterLink *outlink;
457 
458  if (!pkt->size) {
459  if (movie->eof) {
460  if (movie->st[out_id].done) {
461  if (movie->loop_count != 1) {
462  ret = rewind_file(ctx);
463  if (ret < 0)
464  return ret;
465  movie->loop_count -= movie->loop_count > 1;
466  av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
467  return 0; /* retry */
468  }
469  return AVERROR_EOF;
470  }
471  pkt->stream_index = movie->st[out_id].st->index;
472  /* packet is already ready for flushing */
473  } else {
474  ret = av_read_frame(movie->format_ctx, &movie->pkt0);
475  if (ret < 0) {
476  av_init_packet(&movie->pkt0); /* ready for flushing */
477  *pkt = movie->pkt0;
478  if (ret == AVERROR_EOF) {
479  movie->eof = 1;
480  return 0; /* start flushing */
481  }
482  return ret;
483  }
484  *pkt = movie->pkt0;
485  }
486  }
487 
488  pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
489  movie->out_index[pkt->stream_index];
490  if (pkt_out_id < 0) {
491  av_free_packet(&movie->pkt0);
492  pkt->size = 0; /* ready for next run */
493  pkt->data = NULL;
494  return 0;
495  }
496  st = &movie->st[pkt_out_id];
497  outlink = ctx->outputs[pkt_out_id];
498 
499  movie->frame = av_frame_alloc();
500  if (!movie->frame)
501  return AVERROR(ENOMEM);
502 
503  switch (st->st->codec->codec_type) {
504  case AVMEDIA_TYPE_VIDEO:
505  ret = avcodec_decode_video2(st->st->codec, movie->frame, &got_frame, pkt);
506  break;
507  case AVMEDIA_TYPE_AUDIO:
508  ret = avcodec_decode_audio4(st->st->codec, movie->frame, &got_frame, pkt);
509  break;
510  default:
511  ret = AVERROR(ENOSYS);
512  break;
513  }
514  if (ret < 0) {
515  av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
516  av_frame_free(&movie->frame);
517  av_free_packet(&movie->pkt0);
518  movie->pkt.size = 0;
519  movie->pkt.data = NULL;
520  return 0;
521  }
522  if (!ret || st->st->codec->codec_type == AVMEDIA_TYPE_VIDEO)
523  ret = pkt->size;
524 
525  pkt->data += ret;
526  pkt->size -= ret;
527  if (pkt->size <= 0) {
528  av_free_packet(&movie->pkt0);
529  pkt->size = 0; /* ready for next run */
530  pkt->data = NULL;
531  }
532  if (!got_frame) {
533  if (!ret)
534  st->done = 1;
535  av_frame_free(&movie->frame);
536  return 0;
537  }
538 
539  av_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
540  describe_frameref(movie->frame, outlink));
541 
543  ret = ff_filter_frame(outlink, movie->frame);
544  movie->frame = NULL;
545 
546  if (ret < 0)
547  return ret;
548  return pkt_out_id == out_id;
549 }
550 
551 static int movie_request_frame(AVFilterLink *outlink)
552 {
553  AVFilterContext *ctx = outlink->src;
554  unsigned out_id = FF_OUTLINK_IDX(outlink);
555  int ret;
556 
557  while (1) {
558  ret = movie_push_frame(ctx, out_id);
559  if (ret)
560  return FFMIN(ret, 0);
561  }
562 }
563 
564 #if CONFIG_MOVIE_FILTER
565 
566 AVFILTER_DEFINE_CLASS(movie);
567 
568 AVFilter avfilter_avsrc_movie = {
569  .name = "movie",
570  .description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
571  .priv_size = sizeof(MovieContext),
572  .priv_class = &movie_class,
574  .uninit = movie_uninit,
576 
577  .inputs = NULL,
578  .outputs = NULL,
580 };
581 
582 #endif /* CONFIG_MOVIE_FILTER */
583 
584 #if CONFIG_AMOVIE_FILTER
585 
586 #define amovie_options movie_options
587 AVFILTER_DEFINE_CLASS(amovie);
588 
589 AVFilter avfilter_avsrc_amovie = {
590  .name = "amovie",
591  .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
592  .priv_size = sizeof(MovieContext),
594  .uninit = movie_uninit,
596 
597  .inputs = NULL,
598  .outputs = NULL,
599  .priv_class = &amovie_class,
601 };
602 
603 #endif /* CONFIG_AMOVIE_FILTER */
const char * name
Definition: avisynth_c.h:675
static AVStream * find_stream(void *log, AVFormatContext *avf, const char *spec)
Definition: src_movie.c:92
void * av_calloc(size_t nmemb, size_t size) av_malloc_attrib
Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...
Definition: mem.c:249
#define AVERROR_PATCHWELCOME
void av_free_packet(AVPacket *pkt)
Free a packet.
Definition: avpacket.c:279
This structure describes decoded (raw) audio or video data.
Definition: frame.h:96
AVOption.
Definition: opt.h:253
const char * name
Filter name.
Definition: avfilter.h:468
static av_cold void movie_uninit(AVFilterContext *ctx)
Definition: src_movie.c:315
void * priv
private data for use by the filter
Definition: avfilter.h:648
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: avcodec.h:4153
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:111
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:72
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
Open an input stream and read the header.
Definition: utils.c:487
char * av_strdup(const char *s) av_malloc_attrib
Duplicate the string s.
Definition: mem.c:256
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVStream * st
Definition: src_movie.c:47
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:686
int num
numerator
Definition: rational.h:44
int index
stream index in AVFormatContext
Definition: avformat.h:668
int size
Definition: avcodec.h:1064
static const AVOption movie_options[]
Definition: src_movie.c:75
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1342
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:71
#define FF_OUTLINK_IDX(link)
Definition: internal.h:319
enum AVMediaType type
Definition: avcodec.h:2935
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
static int query_formats(AVFilterContext *ctx)
Definition: af_aconvert.c:79
discard all
Definition: avcodec.h:618
char * stream_specs
user-provided list of streams, separated by +
Definition: src_movie.c:58
AVCodec.
Definition: avcodec.h:2922
#define av_cold
Definition: avcodec.h:653
char * file_name
Definition: src_movie.c:57
AVPacket pkt0
Definition: src_movie.c:64
void av_freep(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:234
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:294
Format I/O context.
Definition: avformat.h:968
double seek_point_d
Definition: src_movie.c:55
const char * name
Pad name.
Definition: internal.h:66
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1118
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1881
int(* request_frame)(AVFilterLink *link)
Frame request callback.
Definition: internal.h:119
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:334
libavcodec/libavfilter gluing utilities
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:4133
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:182
void ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:413
AVFrame * frame
video frame to store the decoded images in
Definition: src_movie.c:65
#define AV_LOG_VERBOSE
Detailed information.
Definition: avcodec.h:4163
#define AVFILTER_FLAG_DYNAMIC_OUTPUTS
The number of the filter outputs is not determined just by AVFilter.outputs.
Definition: avfilter.h:431
static AVFrame * frame
Definition: demuxing.c:51
A filter pad used for either input or output.
Definition: internal.h:60
int av_find_best_stream(AVFormatContext *ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec **decoder_ret, int flags)
Find the &quot;best&quot; stream in the file.
Definition: utils.c:3169
int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
Definition: utils.c:2505
#define av_err2str(errnum)
int width
width and height of the video frame
Definition: frame.h:145
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: avcodec.h:4147
int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt)
Decode the video frame of size avpkt-&gt;size from avpkt-&gt;data into picture.
Definition: utils.c:2029
unsigned nb_outputs
number of output pads
Definition: avfilter.h:646
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:151
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:110
struct AVCodec * codec
Definition: avcodec.h:1155
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:123
static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
Definition: src_movie.c:167
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1934
#define FLAGS
Definition: src_movie.c:73
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:70
unsigned int nb_streams
A list of all streams in the file.
Definition: avformat.h:1015
ret
Definition: avfilter.c:961
int width
picture width / height.
Definition: avcodec.h:1314
AVStream ** streams
Definition: avformat.h:1016
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:630
int loop_count
Definition: src_movie.c:60
#define FFMIN(a, b)
Definition: avcodec.h:925
static int movie_config_output_props(AVFilterLink *outlink)
Definition: src_movie.c:364
int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt)
Decode the audio frame of size avpkt-&gt;size from avpkt-&gt;data into frame.
Definition: utils.c:2164
char * format_name
Definition: src_movie.c:56
int refcounted_frames
If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_dec...
Definition: avcodec.h:2148
int max_stream_index
max stream # actually used for output
Definition: src_movie.c:67
static av_cold int movie_common_init(AVFilterContext *ctx)
Definition: src_movie.c:190
Main libavfilter public API header.
Stream structure.
Definition: avformat.h:667
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal decoder state / flush internal buffers.
Definition: utils.c:2843
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
Definition: utils.c:2607
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:642
int * out_index
stream number -&gt; output number map, or -1
Definition: src_movie.c:69
static AVInputFormat * iformat
Definition: ffprobe.c:176
void ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:418
enum AVMediaType codec_type
Definition: avcodec.h:1154
AVFilterChannelLayouts * avfilter_make_format64_list(const int64_t *fmts)
Definition: formats.c:303
#define FFMAX(a, b)
Definition: avcodec.h:923
enum AVCodecID codec_id
Definition: avcodec.h:1157
int sample_rate
samples per second
Definition: avcodec.h:1873
main external API structure.
Definition: avcodec.h:1146
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:177
void * buf
Definition: avisynth_c.h:594
Describe the class of an AVClass context structure.
Definition: log.h:50
#define AVSEEK_FLAG_BACKWARD
Definition: avformat.h:1838
Filter definition.
Definition: avfilter.h:464
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:102
int64_t seek_point
seekpoint in microseconds
Definition: src_movie.c:54
uint8_t * data
Definition: avcodec.h:1063
static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
Try to push a frame to the requested output.
Definition: src_movie.c:450
AVMediaType
Definition: avutil.h:180
discard useless packets like 0 size packets in avi
Definition: avcodec.h:614
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
Definition: utils.c:1157
#define snprintf
Definition: snprintf.h:34
#define type
int av_read_frame(AVFormatContext *s, AVPacket *pkt)
Return the next frame of a stream.
Definition: utils.c:1432
static int flags
Definition: cpu.c:45
#define AVERROR_EOF
int64_t start_time
Decoding: position of the first frame of the component, in AV_TIME_BASE fractional seconds...
Definition: avformat.h:1025
int stream_index
for compatibility
Definition: src_movie.c:59
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Seek to the keyframe at timestamp.
Definition: utils.c:2061
int64_t av_frame_get_best_effort_timestamp(const AVFrame *frame)
Accessors for some AVFrame fields.
#define OFFSET(x)
Definition: src_movie.c:72
static int movie_request_frame(AVFilterLink *outlink)
Definition: src_movie.c:551
static int open_stream(void *log, MovieStream *st)
Definition: src_movie.c:146
#define describe_frameref(f, link)
Definition: src_movie.c:413
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
Read packets of a media file to get stream information.
Definition: utils.c:2710
static double c[64]
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:183
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
Definition: avpacket.c:49
int den
denominator
Definition: rational.h:45
AVPacket pkt
Definition: src_movie.c:64
static AVCodecContext * dec_ctx
void avformat_close_input(AVFormatContext **s)
Close an opened input AVFormatContext.
Definition: utils.c:3309
static int movie_query_formats(AVFilterContext *ctx)
Definition: src_movie.c:332
#define AVERROR_BUG
int channels
number of audio channels
Definition: avcodec.h:1874
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:301
AVFilterPad * output_pads
array of output pads
Definition: avfilter.h:641
static int rewind_file(AVFilterContext *ctx)
Definition: src_movie.c:416
AVFormatContext * format_ctx
Definition: src_movie.c:62
#define AVERROR(e)
static char * describe_frame_to_str(char *dst, size_t dst_size, AVFrame *frame, AVFilterLink *link)
Definition: src_movie.c:387
An instance of a filter.
Definition: avfilter.h:627
int height
Definition: frame.h:145
int(* config_props)(AVFilterLink *link)
Link configuration callback.
Definition: internal.h:135
static AVPacket pkt
Definition: demuxing.c:52
int stream_index
Definition: avcodec.h:1065
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:703
int dummy
Definition: motion-test.c:64
attribute_deprecated int type
Definition: frame.h:281
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:726
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:839
static int ff_insert_outpad(AVFilterContext *f, unsigned index, AVFilterPad *p)
Insert a new output pad for the filter.
Definition: internal.h:271
This structure stores compressed data.
Definition: avcodec.h:1040
void av_register_all(void)
Initialize libavformat and register all the muxers, demuxers and protocols.
Definition: allformats.c:52
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:150
#define av_ts2str(ts)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:50
for(j=16;j >0;--j)
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avcodec.h:2278
AVInputFormat * av_find_input_format(const char *short_name)
Find AVInputFormat based on the short name of the input format.
Definition: format.c:177
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.
MovieStream * st
array of all streams, one per output
Definition: src_movie.c:68
int64_t av_get_default_channel_layout(int nb_channels)
Return default channel layout for a given number of channels.