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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 
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 
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 
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  while (!av_fifo_size(buf->fifo)) {
137  if (inlink->status)
138  return inlink->status;
139  if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
140  return AVERROR(EAGAIN);
141  if ((ret = ff_request_frame(inlink)) < 0)
142  return ret;
143  while (inlink->frame_wanted_out) {
144  ret = ff_filter_graph_run_once(ctx->graph);
145  if (ret < 0)
146  return ret;
147  }
148  }
149 
150  if (flags & AV_BUFFERSINK_FLAG_PEEK) {
151  cur_frame = *((AVFrame **)av_fifo_peek2(buf->fifo, 0));
152  if ((ret = av_frame_ref(frame, cur_frame)) < 0)
153  return ret;
154  } else {
155  av_fifo_generic_read(buf->fifo, &cur_frame, sizeof(cur_frame), NULL);
156  av_frame_move_ref(frame, cur_frame);
157  av_frame_free(&cur_frame);
158  }
159 
160  return 0;
161 }
162 
164  int nb_samples)
165 {
166  BufferSinkContext *s = ctx->priv;
167  AVFilterLink *link = ctx->inputs[0];
168  AVFrame *tmp;
169 
170  if (!(tmp = ff_get_audio_buffer(link, nb_samples)))
171  return AVERROR(ENOMEM);
172  av_audio_fifo_read(s->audio_fifo, (void**)tmp->extended_data, nb_samples);
173 
174  tmp->pts = s->next_pts;
175  if (s->next_pts != AV_NOPTS_VALUE)
176  s->next_pts += av_rescale_q(nb_samples, (AVRational){1, link->sample_rate},
177  link->time_base);
178 
179  av_frame_move_ref(frame, tmp);
180  av_frame_free(&tmp);
181 
182  return 0;
183 }
184 
186  AVFrame *frame, int nb_samples)
187 {
188  BufferSinkContext *s = ctx->priv;
189  AVFilterLink *link = ctx->inputs[0];
190  AVFrame *cur_frame;
191  int ret = 0;
192 
193  if (!s->audio_fifo) {
194  int nb_channels = link->channels;
195  if (!(s->audio_fifo = av_audio_fifo_alloc(link->format, nb_channels, nb_samples)))
196  return AVERROR(ENOMEM);
197  }
198 
199  while (ret >= 0) {
200  if (av_audio_fifo_size(s->audio_fifo) >= nb_samples)
201  return read_from_fifo(ctx, frame, nb_samples);
202 
203  if (!(cur_frame = av_frame_alloc()))
204  return AVERROR(ENOMEM);
205  ret = av_buffersink_get_frame_flags(ctx, cur_frame, 0);
206  if (ret == AVERROR_EOF && av_audio_fifo_size(s->audio_fifo)) {
207  av_frame_free(&cur_frame);
208  return read_from_fifo(ctx, frame, av_audio_fifo_size(s->audio_fifo));
209  } else if (ret < 0) {
210  av_frame_free(&cur_frame);
211  return ret;
212  }
213 
214  if (cur_frame->pts != AV_NOPTS_VALUE) {
215  s->next_pts = cur_frame->pts -
217  (AVRational){ 1, link->sample_rate },
218  link->time_base);
219  }
220 
221  ret = av_audio_fifo_write(s->audio_fifo, (void**)cur_frame->extended_data,
222  cur_frame->nb_samples);
223  av_frame_free(&cur_frame);
224  }
225 
226  return ret;
227 }
228 
230 {
231  static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
233  if (!params)
234  return NULL;
235 
236  params->pixel_fmts = pixel_fmts;
237  return params;
238 }
239 
241 {
243 
244  if (!params)
245  return NULL;
246  return params;
247 }
248 
250 {
251  BufferSinkContext *buf = ctx->priv;
252 
254  if (!buf->fifo) {
255  av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n");
256  return AVERROR(ENOMEM);
257  }
258  buf->warning_limit = 100;
259  buf->next_pts = AV_NOPTS_VALUE;
260  return 0;
261 }
262 
264 {
265  AVFilterLink *inlink = ctx->inputs[0];
266 
267  inlink->min_samples = inlink->max_samples =
268  inlink->partial_buf_size = frame_size;
269 }
270 
272 {
273  av_assert0( !strcmp(ctx->filter->name, "buffersink")
274  || !strcmp(ctx->filter->name, "ffbuffersink"));
275 
276  return ctx->inputs[0]->frame_rate;
277 }
278 
279 static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
280 {
281  BufferSinkContext *buf = ctx->priv;
282  AVBufferSinkParams *params = opaque;
283  int ret;
284 
285  if (params) {
286  if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0)
287  return ret;
288  }
289 
290  return common_init(ctx);
291 }
292 
293 #define CHECK_LIST_SIZE(field) \
294  if (buf->field ## _size % sizeof(*buf->field)) { \
295  av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
296  "should be multiple of %d\n", \
297  buf->field ## _size, (int)sizeof(*buf->field)); \
298  return AVERROR(EINVAL); \
299  }
301 {
302  BufferSinkContext *buf = ctx->priv;
304  unsigned i;
305  int ret;
306 
307  CHECK_LIST_SIZE(pixel_fmts)
308  if (buf->pixel_fmts_size) {
309  for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
310  if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0)
311  return ret;
312  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
313  return ret;
314  } else {
315  if ((ret = ff_default_query_formats(ctx)) < 0)
316  return ret;
317  }
318 
319  return 0;
320 }
321 
322 static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
323 {
324  BufferSinkContext *buf = ctx->priv;
325  AVABufferSinkParams *params = opaque;
326  int ret;
327 
328  if (params) {
329  if ((ret = av_opt_set_int_list(buf, "sample_fmts", params->sample_fmts, AV_SAMPLE_FMT_NONE, 0)) < 0 ||
330  (ret = av_opt_set_int_list(buf, "sample_rates", params->sample_rates, -1, 0)) < 0 ||
331  (ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 ||
332  (ret = av_opt_set_int_list(buf, "channel_counts", params->channel_counts, -1, 0)) < 0 ||
333  (ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0)
334  return ret;
335  }
336  return common_init(ctx);
337 }
338 
340 {
341  BufferSinkContext *buf = ctx->priv;
344  unsigned i;
345  int ret;
346 
351 
352  if (buf->sample_fmts_size) {
353  for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
354  if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0)
355  return ret;
356  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
357  return ret;
358  }
359 
360  if (buf->channel_layouts_size || buf->channel_counts_size ||
361  buf->all_channel_counts) {
362  for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
363  if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)
364  return ret;
365  for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
366  if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)
367  return ret;
368  if (buf->all_channel_counts) {
369  if (layouts)
370  av_log(ctx, AV_LOG_WARNING,
371  "Conflicting all_channel_counts and list in options\n");
372  else if (!(layouts = ff_all_channel_counts()))
373  return AVERROR(ENOMEM);
374  }
375  if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
376  return ret;
377  }
378 
379  if (buf->sample_rates_size) {
380  formats = NULL;
381  for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
382  if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0)
383  return ret;
384  if ((ret = ff_set_common_samplerates(ctx, formats)) < 0)
385  return ret;
386  }
387 
388  return 0;
389 }
390 
391 #define OFFSET(x) offsetof(BufferSinkContext, x)
392 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
393 static const AVOption buffersink_options[] = {
394  { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
395  { NULL },
396 };
397 #undef FLAGS
398 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
399 static const AVOption abuffersink_options[] = {
400  { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
401  { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS },
402  { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
403  { "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
404  { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
405  { NULL },
406 };
407 #undef FLAGS
408 
409 AVFILTER_DEFINE_CLASS(buffersink);
410 AVFILTER_DEFINE_CLASS(abuffersink);
411 
413  {
414  .name = "default",
415  .type = AVMEDIA_TYPE_VIDEO,
416  .filter_frame = filter_frame,
417  },
418  { NULL }
419 };
420 
422  .name = "buffersink",
423  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
424  .priv_size = sizeof(BufferSinkContext),
425  .priv_class = &buffersink_class,
426  .init_opaque = vsink_init,
427  .uninit = uninit,
428 
430  .inputs = avfilter_vsink_buffer_inputs,
431  .outputs = NULL,
432 };
433 
435  {
436  .name = "default",
437  .type = AVMEDIA_TYPE_AUDIO,
438  .filter_frame = filter_frame,
439  },
440  { NULL }
441 };
442 
444  .name = "abuffersink",
445  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
446  .priv_class = &abuffersink_class,
447  .priv_size = sizeof(BufferSinkContext),
448  .init_opaque = asink_init,
449  .uninit = uninit,
450 
452  .inputs = avfilter_asink_abuffer_inputs,
453  .outputs = NULL,
454 };
#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:549
const char * s
Definition: avisynth_c.h:768
AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)
Allocate an AVAudioFifo.
Definition: audio_fifo.c:59
int av_audio_fifo_read(AVAudioFifo *af, void **data, int nb_samples)
Read data from an AVAudioFifo.
Definition: audio_fifo.c:181
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:184
AVOption.
Definition: opt.h:246
AVBufferSinkParams * av_buffersink_params_alloc(void)
Create an AVBufferSinkParams structure.
Definition: buffersink.c:229
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
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:163
const int * channel_counts
list of allowed channel counts, terminated by -1
Definition: buffersink.h:82
AVABufferSinkParams * av_abuffersink_params_alloc(void)
Create an AVABufferSinkParams structure.
Definition: buffersink.c:240
#define av_opt_set_int_list(obj, name, val, term, flags)
Set a binary option to an integer list.
Definition: opt.h:709
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:399
static enum AVSampleFormat formats[]
Definition: avresample.c:163
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:519
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
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
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:324
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:80
const char * name
Pad name.
Definition: internal.h:59
int ff_filter_graph_run_once(AVFilterGraph *graph)
Run one round of processing on a filter graph.
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:315
char * name
name of this filter instance
Definition: avfilter.h:312
#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:279
AVAudioFifo * audio_fifo
FIFO for audio samples.
Definition: buffersink.c:60
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:145
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:385
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:268
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 int flags
Definition: log.c:57
static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
Definition: buffersink.c:322
static const AVOption buffersink_options[]
Definition: buffersink.c:393
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define CHECK_LIST_SIZE(field)
Definition: buffersink.c:293
#define FLAGS
Definition: buffersink.c:398
#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:60
A filter pad used for either input or output.
Definition: internal.h:53
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:302
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
AVFILTER_DEFINE_CLASS(buffersink)
static int vsink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:300
#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:169
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:568
#define FIFO_INIT_SIZE
Definition: buffersink.c:65
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:64
#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:158
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
int * sample_rates
list of allowed sample rates, terminated by -1
Definition: buffersink.h:84
void * priv
private data for use by the filter
Definition: avfilter.h:322
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:213
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:560
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:434
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:337
int channel_layouts_size
Definition: buffersink.c:52
AVFilter ff_vsink_buffer
Definition: buffersink.c:421
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
Context for an Audio FIFO Buffer.
Definition: audio_fifo.c:34
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:228
audio channel layout utility functions
Struct to use for initializing an abuffersink context.
Definition: buffersink.h:79
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:185
AVFormatContext * ctx
Definition: movenc.c:48
Struct to use for initializing a buffersink context.
Definition: buffersink.h:65
enum AVPixelFormat * pixel_fmts
list of accepted pixel formats, must be terminated with -1
Definition: buffersink.c:45
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:386
static const uint8_t channel_counts[7]
Definition: dca_lbr.c:114
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:443
A list of supported channel layouts.
Definition: formats.h:85
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:597
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:376
int frame_size
Definition: mxfenc.c:1820
#define OFFSET(x)
Definition: buffersink.c:391
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
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 av_fifo_realloc2(AVFifoBuffer *f, unsigned int new_size)
Resize an AVFifoBuffer.
Definition: fifo.c:87
void * buf
Definition: avisynth_c.h:690
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:118
int all_channel_counts
if not 0, accept any channel count or layout
Definition: buffersink.h:83
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:144
Rational number (pair of numerator and denominator).
Definition: rational.h:58
#define NB_ITEMS(list)
Definition: buffersink.c:64
const char * name
Filter name.
Definition: avfilter.h:148
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:271
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
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
Write data to an AVAudioFifo.
Definition: audio_fifo.c:112
int64_t next_pts
interpolating audio pts
Definition: buffersink.c:61
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244
sample_rates
common internal and external API header
static int ref[MAX_W *MAX_W]
Definition: jpeg2000dwt.c:107
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:66
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
Set the frame size for an audio buffer sink.
Definition: buffersink.c:263
static av_cold int common_init(AVFilterContext *ctx)
Definition: buffersink.c:249
#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:53
Audio FIFO Buffer.
static int asink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:339
static int filter_frame(AVFilterLink *link, AVFrame *frame)
Definition: buffersink.c:104
static uint8_t tmp[8]
Definition: des.c:38
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:307
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
#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:412
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:369
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:410
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
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:81
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
unsigned warning_limit
Definition: buffersink.c:42
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:310
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:556
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:242