FFmpeg  4.3.7
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/avassert.h"
28 #include "libavutil/common.h"
29 #include "libavutil/internal.h"
30 #include "libavutil/opt.h"
31 
32 #define FF_INTERNAL_FIELDS 1
33 #include "framequeue.h"
34 
35 #include "audio.h"
36 #include "avfilter.h"
37 #include "buffersink.h"
38 #include "filters.h"
39 #include "internal.h"
40 
41 typedef struct BufferSinkContext {
42  const AVClass *class;
43  unsigned warning_limit;
44 
45  /* only used for video */
46  enum AVPixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1
48 
49  /* only used for audio */
50  enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
52  int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1
54  int *channel_counts; ///< list of accepted channel counts, terminated by -1
57  int *sample_rates; ///< list of accepted sample rates, terminated by -1
59 
62 
63 #define NB_ITEMS(list) (list ## _size / sizeof(*list))
64 
66 {
67  return av_buffersink_get_frame_flags(ctx, frame, 0);
68 }
69 
71 {
72  if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
73  buf->peeked_frame = in;
74  return out ? av_frame_ref(out, in) : 0;
75  } else {
76  av_assert1(out);
77  buf->peeked_frame = NULL;
78  av_frame_move_ref(out, in);
79  av_frame_free(&in);
80  return 0;
81  }
82 }
83 
84 static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
85 {
86  BufferSinkContext *buf = ctx->priv;
87  AVFilterLink *inlink = ctx->inputs[0];
88  int status, ret;
89  AVFrame *cur_frame;
90  int64_t pts;
91 
92  if (buf->peeked_frame)
93  return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);
94 
95  while (1) {
96  ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
97  ff_inlink_consume_frame(inlink, &cur_frame);
98  if (ret < 0) {
99  return ret;
100  } else if (ret) {
101  /* TODO return the frame instead of copying it */
102  return return_or_keep_frame(buf, frame, cur_frame, flags);
103  } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
104  return status;
105  } else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
106  return AVERROR(EAGAIN);
107  } else if (inlink->frame_wanted_out) {
108  ret = ff_filter_graph_run_once(ctx->graph);
109  if (ret < 0)
110  return ret;
111  } else {
112  ff_inlink_request_frame(inlink);
113  }
114  }
115 }
116 
118 {
119  return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
120 }
121 
123  AVFrame *frame, int nb_samples)
124 {
125  return get_frame_internal(ctx, frame, 0, nb_samples);
126 }
127 
128 #if FF_API_NEXT
129 AVBufferSinkParams *av_buffersink_params_alloc(void)
130 {
131  static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
132  AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));
133  if (!params)
134  return NULL;
135 
136  params->pixel_fmts = pixel_fmts;
137  return params;
138 }
139 
140 AVABufferSinkParams *av_abuffersink_params_alloc(void)
141 {
142  AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams));
143 
144  if (!params)
145  return NULL;
146  return params;
147 }
148 #endif
149 
151 {
152  BufferSinkContext *buf = ctx->priv;
153 
154  buf->warning_limit = 100;
155  return 0;
156 }
157 
159 {
160  BufferSinkContext *buf = ctx->priv;
161 
162  if (buf->warning_limit &&
163  ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= buf->warning_limit) {
164  av_log(ctx, AV_LOG_WARNING,
165  "%d buffers queued in %s, something may be wrong.\n",
166  buf->warning_limit,
167  (char *)av_x_if_null(ctx->name, ctx->filter->name));
168  buf->warning_limit *= 10;
169  }
170 
171  /* The frame is queued, the rest is up to get_frame_internal */
172  return 0;
173 }
174 
176 {
177  AVFilterLink *inlink = ctx->inputs[0];
178 
179  inlink->min_samples = inlink->max_samples =
180  inlink->partial_buf_size = frame_size;
181 }
182 
183 #define MAKE_AVFILTERLINK_ACCESSOR(type, field) \
184 type av_buffersink_get_##field(const AVFilterContext *ctx) { \
185  av_assert0(ctx->filter->activate == activate); \
186  return ctx->inputs[0]->field; \
187 }
188 
192 
196 MAKE_AVFILTERLINK_ACCESSOR(AVRational , sample_aspect_ratio)
197 
199 MAKE_AVFILTERLINK_ACCESSOR(uint64_t , channel_layout )
201 
202 MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef * , hw_frames_ctx )
203 
204 #define CHECK_LIST_SIZE(field) \
205  if (buf->field ## _size % sizeof(*buf->field)) { \
206  av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
207  "should be multiple of %d\n", \
208  buf->field ## _size, (int)sizeof(*buf->field)); \
209  return AVERROR(EINVAL); \
210  }
212 {
213  BufferSinkContext *buf = ctx->priv;
215  unsigned i;
216  int ret;
217 
219  if (buf->pixel_fmts_size) {
220  for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
221  if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0)
222  return ret;
223  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
224  return ret;
225  } else {
226  if ((ret = ff_default_query_formats(ctx)) < 0)
227  return ret;
228  }
229 
230  return 0;
231 }
232 
234 {
235  BufferSinkContext *buf = ctx->priv;
238  unsigned i;
239  int ret;
240 
245 
246  if (buf->sample_fmts_size) {
247  for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
248  if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0)
249  return ret;
250  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
251  return ret;
252  }
253 
254  if (buf->channel_layouts_size || buf->channel_counts_size ||
255  buf->all_channel_counts) {
256  for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
257  if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)
258  return ret;
259  for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
260  if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)
261  return ret;
262  if (buf->all_channel_counts) {
263  if (layouts)
264  av_log(ctx, AV_LOG_WARNING,
265  "Conflicting all_channel_counts and list in options\n");
266  else if (!(layouts = ff_all_channel_counts()))
267  return AVERROR(ENOMEM);
268  }
269  if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
270  return ret;
271  }
272 
273  if (buf->sample_rates_size) {
274  formats = NULL;
275  for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
276  if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0)
277  return ret;
278  if ((ret = ff_set_common_samplerates(ctx, formats)) < 0)
279  return ret;
280  }
281 
282  return 0;
283 }
284 
285 #define OFFSET(x) offsetof(BufferSinkContext, x)
286 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
287 static const AVOption buffersink_options[] = {
288  { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
289  { NULL },
290 };
291 #undef FLAGS
292 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
293 static const AVOption abuffersink_options[] = {
294  { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
295  { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS },
296  { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
297  { "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
298  { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
299  { NULL },
300 };
301 #undef FLAGS
302 
303 AVFILTER_DEFINE_CLASS(buffersink);
304 AVFILTER_DEFINE_CLASS(abuffersink);
305 
307  {
308  .name = "default",
309  .type = AVMEDIA_TYPE_VIDEO,
310  },
311  { NULL }
312 };
313 
315  .name = "buffersink",
316  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
317  .priv_size = sizeof(BufferSinkContext),
318  .priv_class = &buffersink_class,
319  .init = common_init,
321  .activate = activate,
322  .inputs = avfilter_vsink_buffer_inputs,
323  .outputs = NULL,
324 };
325 
327  {
328  .name = "default",
329  .type = AVMEDIA_TYPE_AUDIO,
330  },
331  { NULL }
332 };
333 
335  .name = "abuffersink",
336  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
337  .priv_class = &abuffersink_class,
338  .priv_size = sizeof(BufferSinkContext),
339  .init = common_init,
341  .activate = activate,
342  .inputs = avfilter_asink_abuffer_inputs,
343  .outputs = NULL,
344 };
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link&#39;s FIFO and update the link&#39;s stats.
Definition: avfilter.c:1476
#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:586
enum AVSampleFormat * sample_fmts
list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
Definition: buffersink.c:50
static const char * format[]
Definition: af_aiir.c:339
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
AVOption.
Definition: opt.h:246
#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
int * sample_rates
list of accepted sample rates, terminated by -1
Definition: buffersink.c:57
static const AVOption abuffersink_options[]
Definition: buffersink.c:293
int * channel_counts
list of accepted channel counts, terminated by -1
Definition: buffersink.c:54
static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
Definition: buffersink.c:70
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:583
AVFrame * peeked_frame
Definition: buffersink.c:60
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1602
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:355
memory buffer sink API for audio and video
const char * name
Pad name.
Definition: internal.h:60
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:346
char * name
name of this filter instance
Definition: avfilter.h:343
#define av_cold
Definition: attributes.h:88
#define av_malloc(s)
AVOptions.
AVBufferSinkParams * av_buffersink_params_alloc(void)
Definition: buffersink.c:129
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:444
static AVFrame * frame
static const AVOption buffersink_options[]
Definition: buffersink.c:287
#define CHECK_LIST_SIZE(field)
Definition: buffersink.c:204
channels
Definition: aptx.h:33
#define FLAGS
Definition: buffersink.c:292
#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:54
static void * av_x_if_null(const void *p, const void *x)
Return x default pointer in case p is NULL.
Definition: avutil.h:308
AVFILTER_DEFINE_CLASS(buffersink)
int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)
Test and acknowledge the change of status on the link.
Definition: avfilter.c:1431
static int vsink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:211
AVABufferSinkParams * av_abuffersink_params_alloc(void)
Definition: buffersink.c:140
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
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:605
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:356
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
void * priv
private data for use by the filter
Definition: avfilter.h:353
static int activate(AVFilterContext *ctx)
Definition: buffersink.c:158
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVFilterPad avfilter_asink_abuffer_inputs[]
Definition: buffersink.c:326
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:350
int channel_layouts_size
Definition: buffersink.c:53
AVFilter ff_vsink_buffer
Definition: buffersink.c:314
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:117
common internal API header
int64_t * channel_layouts
list of accepted channel layouts, terminated by -1
Definition: buffersink.c:52
audio channel layout utility functions
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:53
uint8_t w
Definition: llviddspenc.c:38
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:122
AVFormatContext * ctx
Definition: movenc.c:48
enum AVPixelFormat * pixel_fmts
list of accepted pixel formats, must be terminated with -1
Definition: buffersink.c:46
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
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:334
A list of supported channel layouts.
Definition: formats.h:85
#define attribute_align_arg
Definition: internal.h:62
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:634
sample_rate
int frame_size
Definition: mxfenc.c:2137
#define OFFSET(x)
Definition: buffersink.c:285
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)
Take samples from the link&#39;s FIFO and update the link&#39;s stats.
Definition: avfilter.c:1495
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
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
cl_device_type type
#define NB_ITEMS(list)
Definition: buffersink.c:63
AVMediaType
Definition: avutil.h:199
const char * name
Filter name.
Definition: avfilter.h:148
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:565
static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
Definition: buffersink.c:84
A reference to a data buffer.
Definition: buffer.h:81
static int query_formats(AVFilterContext *ctx)
Definition: aeval.c:244
static size_t ff_framequeue_queued_frames(const FFFrameQueue *fq)
Get the number of queued frames.
Definition: framequeue.h:146
common internal and external API header
void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size)
Set the frame size for an audio buffer sink.
Definition: buffersink.c:175
static av_cold int common_init(AVFilterContext *ctx)
Definition: buffersink.c:150
#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
static int asink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:233
A list of supported formats for one end of a filter link.
Definition: formats.h:64
An instance of a filter.
Definition: avfilter.h:338
FILE * out
Definition: movenc.c:54
#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:306
formats
Definition: signature.h:48
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:454
#define MAKE_AVFILTERLINK_ACCESSOR(type, field)
Definition: buffersink.c:183
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:65
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
unsigned warning_limit
Definition: buffersink.c:43
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:593