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buffersink.c
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1 /*
2  * Copyright (c) 2011 Stefano Sabatini
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * buffer sink
24  */
25 
26 #include "libavutil/audio_fifo.h"
27 #include "libavutil/avassert.h"
29 #include "libavutil/common.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
33 
34 #include "audio.h"
35 #include "avfilter.h"
36 #include "buffersink.h"
37 #include "internal.h"
38 
39 typedef struct BufferSinkContext {
40  const AVClass *class;
41  AVFifoBuffer *fifo; ///< FIFO buffer of video frame references
42  unsigned warning_limit;
43 
44  /* only used for video */
45  enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1
47 
48  /* only used for audio */
49  enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
51  int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
53  int *channel_counts; ///< list of accepted channel counts, terminated by -1
56  int *sample_rates; ///< list of accepted sample rates, terminated by -1
58 
59  /* only used for compat API */
60  AVAudioFifo *audio_fifo; ///< FIFO for audio samples
61  int64_t next_pts; ///< interpolating audio pts
63 
64 #define NB_ITEMS(list) (list ## _size / sizeof(*list))
65 #define FIFO_INIT_SIZE 8
66 #define FIFO_INIT_ELEMENT_SIZE sizeof(void *)
67 
68 static av_cold void uninit(AVFilterContext *ctx)
69 {
70  BufferSinkContext *sink = ctx->priv;
71  AVFrame *frame;
72 
73  if (sink->audio_fifo)
75 
76  if (sink->fifo) {
77  while (av_fifo_size(sink->fifo) >= FIFO_INIT_ELEMENT_SIZE) {
78  av_fifo_generic_read(sink->fifo, &frame, sizeof(frame), NULL);
79  av_frame_free(&frame);
80  }
81  av_fifo_freep(&sink->fifo);
82  }
83 }
84 
85 static int add_buffer_ref(AVFilterContext *ctx, AVFrame *ref)
86 {
87  BufferSinkContext *buf = ctx->priv;
88 
90  /* realloc fifo size */
91  if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) {
92  av_log(ctx, AV_LOG_ERROR,
93  "Cannot buffer more frames. Consume some available frames "
94  "before adding new ones.\n");
95  return AVERROR(ENOMEM);
96  }
97  }
98 
99  /* cache frame */
101  return 0;
102 }
103 
105 {
106  AVFilterContext *ctx = link->dst;
107  BufferSinkContext *buf = link->dst->priv;
108  int ret;
109 
110  if ((ret = add_buffer_ref(ctx, frame)) < 0)
111  return ret;
112  if (buf->warning_limit &&
114  av_log(ctx, AV_LOG_WARNING,
115  "%d buffers queued in %s, something may be wrong.\n",
116  buf->warning_limit,
117  (char *)av_x_if_null(ctx->name, ctx->filter->name));
118  buf->warning_limit *= 10;
119  }
120  return 0;
121 }
122 
123 int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame)
124 {
125  return av_buffersink_get_frame_flags(ctx, frame, 0);
126 }
127 
129 {
130  BufferSinkContext *buf = ctx->priv;
131  AVFilterLink *inlink = ctx->inputs[0];
132  int ret;
133  AVFrame *cur_frame;
134 
135  /* no picref available, fetch it from the filterchain */
136  if (!av_fifo_size(buf->fifo)) {
137  if (inlink->closed)
138  return AVERROR_EOF;
139  if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
140  return AVERROR(EAGAIN);
141  if ((ret = ff_request_frame(inlink)) < 0)
142  return ret;
143  }
144 
145  if (!av_fifo_size(buf->fifo))
146  return AVERROR(EINVAL);
147 
148  if (flags & AV_BUFFERSINK_FLAG_PEEK) {
149  cur_frame = *((AVFrame **)av_fifo_peek2(buf->fifo, 0));
150  if ((ret = av_frame_ref(frame, cur_frame)) < 0)
151  return ret;
152  } else {
153  av_fifo_generic_read(buf->fifo, &cur_frame, sizeof(cur_frame), NULL);
154  av_frame_move_ref(frame, cur_frame);
155  av_frame_free(&cur_frame);
156  }
157 
158  return 0;
159 }
160 
162  int nb_samples)
163 {
164  BufferSinkContext *s = ctx->priv;
165  AVFilterLink *link = ctx->inputs[0];
166  AVFrame *tmp;
167 
168  if (!(tmp = ff_get_audio_buffer(link, nb_samples)))
169  return AVERROR(ENOMEM);
170  av_audio_fifo_read(s->audio_fifo, (void**)tmp->extended_data, nb_samples);
171 
172  tmp->pts = s->next_pts;
173  if (s->next_pts != AV_NOPTS_VALUE)
174  s->next_pts += av_rescale_q(nb_samples, (AVRational){1, link->sample_rate},
175  link->time_base);
176 
177  av_frame_move_ref(frame, tmp);
178  av_frame_free(&tmp);
179 
180  return 0;
181 }
182 
183 int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx,
184  AVFrame *frame, int nb_samples)
185 {
186  BufferSinkContext *s = ctx->priv;
187  AVFilterLink *link = ctx->inputs[0];
188  AVFrame *cur_frame;
189  int ret = 0;
190 
191  if (!s->audio_fifo) {
192  int nb_channels = link->channels;
193  if (!(s->audio_fifo = av_audio_fifo_alloc(link->format, nb_channels, nb_samples)))
194  return AVERROR(ENOMEM);
195  }
196 
197  while (ret >= 0) {
198  if (av_audio_fifo_size(s->audio_fifo) >= nb_samples)
199  return read_from_fifo(ctx, frame, nb_samples);
200 
201  if (!(cur_frame = av_frame_alloc()))
202  return AVERROR(ENOMEM);
203  ret = av_buffersink_get_frame_flags(ctx, cur_frame, 0);
204  if (ret == AVERROR_EOF && av_audio_fifo_size(s->audio_fifo)) {
205  av_frame_free(&cur_frame);
206  return read_from_fifo(ctx, frame, av_audio_fifo_size(s->audio_fifo));
207  } else if (ret < 0) {
208  av_frame_free(&cur_frame);
209  return ret;
210  }
211 
212  if (cur_frame->pts != AV_NOPTS_VALUE) {
213  s->next_pts = cur_frame->pts -
215  (AVRational){ 1, link->sample_rate },
216  link->time_base);
217  }
218 
219  ret = av_audio_fifo_write(s->audio_fifo, (void**)cur_frame->extended_data,
220  cur_frame->nb_samples);
221  av_frame_free(&cur_frame);
222  }
223 
224  return ret;
225 }
226 
228 {
229  static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
231  if (!params)
232  return NULL;
233 
234  params->pixel_fmts = pixel_fmts;
235  return params;
236 }
237 
239 {
241 
242  if (!params)
243  return NULL;
244  return params;
245 }
246 
248 {
249  BufferSinkContext *buf = ctx->priv;
250 
252  if (!buf->fifo) {
253  av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n");
254  return AVERROR(ENOMEM);
255  }
256  buf->warning_limit = 100;
257  buf->next_pts = AV_NOPTS_VALUE;
258  return 0;
259 }
260 
262 {
263  AVFilterLink *inlink = ctx->inputs[0];
264 
265  inlink->min_samples = inlink->max_samples =
266  inlink->partial_buf_size = frame_size;
267 }
268 
269 #if FF_API_AVFILTERBUFFER
271 static void compat_free_buffer(AVFilterBuffer *buf)
272 {
273  AVFrame *frame = buf->priv;
274  av_frame_free(&frame);
275  av_free(buf);
276 }
277 
278 static int compat_read(AVFilterContext *ctx,
279  AVFilterBufferRef **pbuf, int nb_samples, int flags)
280 {
281  AVFilterBufferRef *buf;
282  AVFrame *frame;
283  int ret;
284 
285  if (!pbuf)
286  return ff_poll_frame(ctx->inputs[0]);
287 
288  frame = av_frame_alloc();
289  if (!frame)
290  return AVERROR(ENOMEM);
291 
292  if (!nb_samples)
293  ret = av_buffersink_get_frame_flags(ctx, frame, flags);
294  else
295  ret = av_buffersink_get_samples(ctx, frame, nb_samples);
296 
297  if (ret < 0)
298  goto fail;
299 
301  if (ctx->inputs[0]->type == AVMEDIA_TYPE_VIDEO) {
303  AV_PERM_READ,
304  frame->width, frame->height,
305  frame->format);
306  } else {
307  buf = avfilter_get_audio_buffer_ref_from_arrays(frame->extended_data,
308  frame->linesize[0], AV_PERM_READ,
309  frame->nb_samples,
310  frame->format,
311  frame->channel_layout);
312  }
313  if (!buf) {
314  ret = AVERROR(ENOMEM);
315  goto fail;
316  }
317 
318  avfilter_copy_frame_props(buf, frame);
319  )
320 
321  buf->buf->priv = frame;
322  buf->buf->free = compat_free_buffer;
323 
324  *pbuf = buf;
325 
326  return 0;
327 fail:
328  av_frame_free(&frame);
329  return ret;
330 }
331 
332 int attribute_align_arg av_buffersink_read(AVFilterContext *ctx, AVFilterBufferRef **buf)
333 {
334  return compat_read(ctx, buf, 0, 0);
335 }
336 
337 int attribute_align_arg av_buffersink_read_samples(AVFilterContext *ctx, AVFilterBufferRef **buf,
338  int nb_samples)
339 {
340  return compat_read(ctx, buf, nb_samples, 0);
341 }
342 
343 int attribute_align_arg av_buffersink_get_buffer_ref(AVFilterContext *ctx,
344  AVFilterBufferRef **bufref, int flags)
345 {
346  *bufref = NULL;
347 
348  av_assert0( !strcmp(ctx->filter->name, "buffersink")
349  || !strcmp(ctx->filter->name, "abuffersink")
350  || !strcmp(ctx->filter->name, "ffbuffersink")
351  || !strcmp(ctx->filter->name, "ffabuffersink"));
352 
353  return compat_read(ctx, bufref, 0, flags);
354 }
356 #endif
357 
359 {
360  av_assert0( !strcmp(ctx->filter->name, "buffersink")
361  || !strcmp(ctx->filter->name, "ffbuffersink"));
362 
363  return ctx->inputs[0]->frame_rate;
364 }
365 
366 #if FF_API_AVFILTERBUFFER
368 int attribute_align_arg av_buffersink_poll_frame(AVFilterContext *ctx)
369 {
370  BufferSinkContext *buf = ctx->priv;
371  AVFilterLink *inlink = ctx->inputs[0];
372 
373  av_assert0( !strcmp(ctx->filter->name, "buffersink")
374  || !strcmp(ctx->filter->name, "abuffersink")
375  || !strcmp(ctx->filter->name, "ffbuffersink")
376  || !strcmp(ctx->filter->name, "ffabuffersink"));
377 
378  return av_fifo_size(buf->fifo)/FIFO_INIT_ELEMENT_SIZE + ff_poll_frame(inlink);
379 }
381 #endif
382 
383 static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
384 {
385  BufferSinkContext *buf = ctx->priv;
386  AVBufferSinkParams *params = opaque;
387  int ret;
388 
389  if (params) {
390  if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0)
391  return ret;
392  }
393 
394  return common_init(ctx);
395 }
396 
397 #define CHECK_LIST_SIZE(field) \
398  if (buf->field ## _size % sizeof(*buf->field)) { \
399  av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
400  "should be multiple of %d\n", \
401  buf->field ## _size, (int)sizeof(*buf->field)); \
402  return AVERROR(EINVAL); \
403  }
405 {
406  BufferSinkContext *buf = ctx->priv;
408  unsigned i;
409  int ret;
410 
411  CHECK_LIST_SIZE(pixel_fmts)
412  if (buf->pixel_fmts_size) {
413  for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
414  if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0) {
415  ff_formats_unref(&formats);
416  return ret;
417  }
418  ff_set_common_formats(ctx, formats);
419  } else {
421  }
422 
423  return 0;
424 }
425 
426 static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
427 {
428  BufferSinkContext *buf = ctx->priv;
429  AVABufferSinkParams *params = opaque;
430  int ret;
431 
432  if (params) {
433  if ((ret = av_opt_set_int_list(buf, "sample_fmts", params->sample_fmts, AV_SAMPLE_FMT_NONE, 0)) < 0 ||
434  (ret = av_opt_set_int_list(buf, "sample_rates", params->sample_rates, -1, 0)) < 0 ||
435  (ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 ||
436  (ret = av_opt_set_int_list(buf, "channel_counts", params->channel_counts, -1, 0)) < 0 ||
437  (ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0)
438  return ret;
439  }
440  return common_init(ctx);
441 }
442 
444 {
445  BufferSinkContext *buf = ctx->priv;
448  unsigned i;
449  int ret;
450 
453  CHECK_LIST_SIZE(channel_layouts)
454  CHECK_LIST_SIZE(channel_counts)
455 
456  if (buf->sample_fmts_size) {
457  for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
458  if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0) {
459  ff_formats_unref(&formats);
460  return ret;
461  }
462  ff_set_common_formats(ctx, formats);
463  }
464 
465  if (buf->channel_layouts_size || buf->channel_counts_size ||
466  buf->all_channel_counts) {
467  for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
468  if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0) {
469  ff_channel_layouts_unref(&layouts);
470  return ret;
471  }
472  for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
473  if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0) {
474  ff_channel_layouts_unref(&layouts);
475  return ret;
476  }
477  if (buf->all_channel_counts) {
478  if (layouts)
479  av_log(ctx, AV_LOG_WARNING,
480  "Conflicting all_channel_counts and list in options\n");
481  else if (!(layouts = ff_all_channel_counts()))
482  return AVERROR(ENOMEM);
483  }
484  ff_set_common_channel_layouts(ctx, layouts);
485  }
486 
487  if (buf->sample_rates_size) {
488  formats = NULL;
489  for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
490  if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0) {
491  ff_formats_unref(&formats);
492  return ret;
493  }
494  ff_set_common_samplerates(ctx, formats);
495  }
496 
497  return 0;
498 }
499 
500 #define OFFSET(x) offsetof(BufferSinkContext, x)
501 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
502 static const AVOption buffersink_options[] = {
503  { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
504  { NULL },
505 };
506 #undef FLAGS
507 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
508 static const AVOption abuffersink_options[] = {
509  { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
510  { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS },
511  { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
512  { "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
513  { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, FLAGS },
514  { NULL },
515 };
516 #undef FLAGS
517 
518 AVFILTER_DEFINE_CLASS(buffersink);
519 AVFILTER_DEFINE_CLASS(abuffersink);
520 
521 #if FF_API_AVFILTERBUFFER
522 
523 #define ffbuffersink_options buffersink_options
524 #define ffabuffersink_options abuffersink_options
525 AVFILTER_DEFINE_CLASS(ffbuffersink);
526 AVFILTER_DEFINE_CLASS(ffabuffersink);
527 
528 static const AVFilterPad ffbuffersink_inputs[] = {
529  {
530  .name = "default",
531  .type = AVMEDIA_TYPE_VIDEO,
532  .filter_frame = filter_frame,
533  },
534  { NULL },
535 };
536 
537 AVFilter ff_vsink_ffbuffersink = {
538  .name = "ffbuffersink",
539  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
540  .priv_size = sizeof(BufferSinkContext),
541  .priv_class = &ffbuffersink_class,
542  .init_opaque = vsink_init,
543  .uninit = uninit,
544 
546  .inputs = ffbuffersink_inputs,
547  .outputs = NULL,
548 };
549 
550 static const AVFilterPad ffabuffersink_inputs[] = {
551  {
552  .name = "default",
553  .type = AVMEDIA_TYPE_AUDIO,
554  .filter_frame = filter_frame,
555  },
556  { NULL },
557 };
558 
559 AVFilter ff_asink_ffabuffersink = {
560  .name = "ffabuffersink",
561  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
562  .init_opaque = asink_init,
563  .uninit = uninit,
564  .priv_size = sizeof(BufferSinkContext),
565  .priv_class = &ffabuffersink_class,
567  .inputs = ffabuffersink_inputs,
568  .outputs = NULL,
569 };
570 #endif /* FF_API_AVFILTERBUFFER */
571 
573  {
574  .name = "default",
575  .type = AVMEDIA_TYPE_VIDEO,
576  .filter_frame = filter_frame,
577  },
578  { NULL }
579 };
580 
582  .name = "buffersink",
583  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
584  .priv_size = sizeof(BufferSinkContext),
585  .priv_class = &buffersink_class,
586  .init_opaque = vsink_init,
587  .uninit = uninit,
588 
590  .inputs = avfilter_vsink_buffer_inputs,
591  .outputs = NULL,
592 };
593 
595  {
596  .name = "default",
597  .type = AVMEDIA_TYPE_AUDIO,
598  .filter_frame = filter_frame,
599  },
600  { NULL }
601 };
602 
604  .name = "abuffersink",
605  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
606  .priv_class = &abuffersink_class,
607  .priv_size = sizeof(BufferSinkContext),
608  .init_opaque = asink_init,
609  .uninit = uninit,
610 
612  .inputs = avfilter_asink_abuffer_inputs,
613  .outputs = NULL,
614 };
#define NULL
Definition: coverity.c:32
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:523
const char * s
Definition: avisynth_c.h:631
AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)
Allocate an AVAudioFifo.
Definition: audio_fifo.c:60
int av_audio_fifo_read(AVAudioFifo *af, void **data, int nb_samples)
Read data from an AVAudioFifo.
Definition: audio_fifo.c:158
enum AVSampleFormat * sample_fmts
list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
Definition: buffersink.c:49
This structure describes decoded (raw) audio or video data.
Definition: frame.h:171
AVOption.
Definition: opt.h:255
AVBufferSinkParams * av_buffersink_params_alloc(void)
Create an AVBufferSinkParams structure.
Definition: buffersink.c:227
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
static const AVFilterPad outputs[]
Definition: af_ashowinfo.c:248
#define AV_NOWARN_DEPRECATED(code)
Disable warnings about deprecated features This is useful for sections of code kept for backward comp...
Definition: attributes.h:100
static av_cold void uninit(AVFilterContext *ctx)
Definition: buffersink.c:68
Main libavfilter public API header.
static int read_from_fifo(AVFilterContext *ctx, AVFrame *frame, int nb_samples)
Definition: buffersink.c:161
const int * channel_counts
list of allowed channel counts, terminated by -1
Definition: buffersink.h:139
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:441
AVABufferSinkParams * av_abuffersink_params_alloc(void)
Create an AVABufferSinkParams structure.
Definition: buffersink.c:238
#define av_opt_set_int_list(obj, name, val, term, flags)
Set a binary option to an integer list.
Definition: opt.h:757
void av_audio_fifo_free(AVAudioFifo *af)
Free an AVAudioFifo.
Definition: audio_fifo.c:45
int * sample_rates
list of accepted sample rates, terminated by -1
Definition: buffersink.c:56
static const AVOption abuffersink_options[]
Definition: buffersink.c:508
int * channel_counts
list of accepted channel counts, terminated by -1
Definition: buffersink.c:53
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:484
static enum AVSampleFormat formats[]
int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int))
Feed data from a user-supplied callback to an AVFifoBuffer.
Definition: fifo.c:122
memory buffer sink API for audio and video
enum AVSampleFormat * sample_fmts
list of allowed sample formats, terminated by AV_SAMPLE_FMT_NONE
Definition: buffersink.h:137
const char * name
Pad name.
Definition: internal.h:69
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:641
char * name
name of this filter instance
Definition: avfilter.h:638
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
Definition: buffersink.c:383
AVAudioFifo * audio_fifo
FIFO for audio samples.
Definition: buffersink.c:60
#define av_cold
Definition: attributes.h:74
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:135
AVOptions.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
Definition: frame.c:365
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:257
int av_fifo_space(const AVFifoBuffer *f)
Return the amount of space in bytes in the AVFifoBuffer, that is the amount of data you can write int...
Definition: fifo.c:82
static AVFrame * frame
#define FIFO_INIT_ELEMENT_SIZE
Definition: buffersink.c:66
static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
Definition: buffersink.c:426
static const AVOption buffersink_options[]
Definition: buffersink.c:502
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define CHECK_LIST_SIZE(field)
Definition: buffersink.c:397
#define FLAGS
Definition: buffersink.c:507
#define av_log(a,...)
#define AV_BUFFERSINK_FLAG_NO_REQUEST
Tell av_buffersink_get_buffer_ref() not to request a frame from its input.
Definition: buffersink.h:117
A filter pad used for either input or output.
Definition: internal.h:63
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:300
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:140
AVFILTER_DEFINE_CLASS(buffersink)
static int vsink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:404
int width
width and height of the video frame
Definition: frame.h:220
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
static uint8_t * av_fifo_peek2(const AVFifoBuffer *f, int offs)
Return a pointer to the data stored in a FIFO buffer at a certain offset.
Definition: fifo.h:158
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:542
#define FIFO_INIT_SIZE
Definition: buffersink.c:65
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:329
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:74
#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:148
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:175
int * sample_rates
list of allowed sample rates, terminated by -1
Definition: buffersink.h:141
void * priv
private data for use by the filter
Definition: avfilter.h:654
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
Feed data from an AVFifoBuffer to a user-supplied callback.
Definition: fifo.c:177
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:491
GLenum GLint * params
Definition: opengl_enc.c:114
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVFilterPad avfilter_asink_abuffer_inputs[]
Definition: buffersink.c:594
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:323
int channel_layouts_size
Definition: buffersink.c:52
AVFilter ff_vsink_buffer
Definition: buffersink.c:581
int attribute_align_arg av_buffersink_get_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
Get a frame with filtered data from sink and put it in frame.
Definition: buffersink.c:128
#define fail()
Definition: checkasm.h:57
static const int sample_rates[]
Definition: dcaenc.h:32
Context for an Audio FIFO Buffer.
Definition: audio_fifo.c:34
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:427
common internal API header
int64_t * channel_layouts
list of accepted channel layouts, terminated by -1
Definition: buffersink.c:51
int av_audio_fifo_size(AVAudioFifo *af)
Get the current number of samples in the AVAudioFifo available for reading.
Definition: audio_fifo.c:205
audio channel layout utility functions
Struct to use for initializing an abuffersink context.
Definition: buffersink.h:136
int attribute_align_arg av_buffersink_get_samples(AVFilterContext *ctx, AVFrame *frame, int nb_samples)
Same as av_buffersink_get_frame(), but with the ability to specify the number of samples read...
Definition: buffersink.c:183
Struct to use for initializing a buffersink context.
Definition: buffersink.h:122
enum AVPixelFormat * pixel_fmts
list of accepted pixel formats, must be terminated with -1
Definition: buffersink.c:45
offset must point to a pointer immediately followed by an int for the length
Definition: opt.h:229
AVFilter ff_asink_abuffer
Definition: buffersink.c:603
A list of supported channel layouts.
Definition: formats.h:85
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:232
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:571
int frame_size
Definition: mxfenc.c:1805
#define OFFSET(x)
Definition: buffersink.c:500
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:59
int av_fifo_size(const AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
Definition: fifo.c:77
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:199
int av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size)
Resize an AVFifoBuffer.
Definition: fifo.c:87
void ff_channel_layouts_unref(AVFilterChannelLayouts **ref)
Remove a reference to a channel layouts list.
Definition: formats.c:463
void * buf
Definition: avisynth_c.h:553
int all_channel_counts
if not 0, accept any channel count or layout
Definition: buffersink.h:140
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:470
static const AVFilterPad inputs[]
Definition: af_ashowinfo.c:239
rational number numerator/denominator
Definition: rational.h:43
AVFilterBufferRef * avfilter_get_video_buffer_ref_from_arrays(uint8_t *const data[4], const int linesize[4], int perms, int w, int h, enum AVPixelFormat format)
Definition: video.c:64
#define NB_ITEMS(list)
Definition: buffersink.c:64
void ff_formats_unref(AVFilterFormats **ref)
If *ref is non-NULL, remove *ref as a reference to the format list it currently points to...
Definition: formats.c:458
const char * name
Filter name.
Definition: avfilter.h:474
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx)
Get the frame rate of the input.
Definition: buffersink.c:358
AVFifoBuffer * fifo
FIFO buffer of video frame references.
Definition: buffersink.c:41
AVFifoBuffer * av_fifo_alloc_array(size_t nmemb, size_t size)
Initialize an AVFifoBuffer.
Definition: fifo.c:49
static int flags
Definition: cpu.c:47
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:182
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
Write data to an AVAudioFifo.
Definition: audio_fifo.c:113
int64_t next_pts
interpolating audio pts
Definition: buffersink.c:61
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:79
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244
common internal and external API header
static int add_buffer_ref(AVFilterContext *ctx, AVFrame *ref)
Definition: buffersink.c:85
enum AVPixelFormat * pixel_fmts
list of allowed pixel formats, terminated by AV_PIX_FMT_NONE
Definition: buffersink.h:123
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
Set the frame size for an audio buffer sink.
Definition: buffersink.c:261
static av_cold int common_init(AVFilterContext *ctx)
Definition: buffersink.c:247
#define AV_BUFFERSINK_FLAG_PEEK
Tell av_buffersink_get_buffer_ref() to read video/samples buffer reference, but not remove it from th...
Definition: buffersink.h:110
#define av_free(p)
Audio FIFO Buffer.
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:80
static int asink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:443
static int filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: buffersink.c:104
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:633
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
int height
Definition: frame.h:220
#define FF_COUNT2LAYOUT(c)
Encode a channel count as a channel layout.
Definition: formats.h:102
static const AVFilterPad avfilter_vsink_buffer_inputs[]
Definition: buffersink.c:572
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:343
int nb_channels
internal API functions
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition...
Definition: formats.c:394
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:215
int ff_poll_frame(AVFilterLink *link)
Poll a frame from the filter chain.
Definition: avfilter.c:374
int attribute_align_arg av_buffersink_get_frame(AVFilterContext *ctx, AVFrame *frame)
Get a frame with filtered data from sink and put it in frame.
Definition: buffersink.c:123
const int64_t * channel_layouts
list of allowed channel layouts, terminated by -1
Definition: buffersink.h:138
AVPixelFormat
Pixel format.
Definition: pixfmt.h:61
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:225
unsigned warning_limit
Definition: buffersink.c:42
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:636
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:530
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240
static void compat_free_buffer(void *opaque, uint8_t *data)
Definition: utils.c:859