FFmpeg
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 #define FIFO_INIT_SIZE 8
65 #define FIFO_INIT_ELEMENT_SIZE sizeof(void *)
66 
68 {
69  return av_buffersink_get_frame_flags(ctx, frame, 0);
70 }
71 
73 {
74  if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
75  buf->peeked_frame = in;
76  return out ? av_frame_ref(out, in) : 0;
77  } else {
78  av_assert1(out);
79  buf->peeked_frame = NULL;
80  av_frame_move_ref(out, in);
81  av_frame_free(&in);
82  return 0;
83  }
84 }
85 
87 {
88  BufferSinkContext *buf = ctx->priv;
89  AVFilterLink *inlink = ctx->inputs[0];
90  int status, ret;
91  AVFrame *cur_frame;
92  int64_t pts;
93 
94  if (buf->peeked_frame)
95  return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);
96 
97  while (1) {
98  ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
99  ff_inlink_consume_frame(inlink, &cur_frame);
100  if (ret < 0) {
101  return ret;
102  } else if (ret) {
103  /* TODO return the frame instead of copying it */
104  return return_or_keep_frame(buf, frame, cur_frame, flags);
105  } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
106  return status;
107  } else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
108  return AVERROR(EAGAIN);
109  } else if (inlink->frame_wanted_out) {
110  ret = ff_filter_graph_run_once(ctx->graph);
111  if (ret < 0)
112  return ret;
113  } else {
114  ff_inlink_request_frame(inlink);
115  }
116  }
117 }
118 
120 {
121  return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
122 }
123 
125  AVFrame *frame, int nb_samples)
126 {
127  return get_frame_internal(ctx, frame, 0, nb_samples);
128 }
129 
131 {
132  static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
134  if (!params)
135  return NULL;
136 
137  params->pixel_fmts = pixel_fmts;
138  return params;
139 }
140 
142 {
144 
145  if (!params)
146  return NULL;
147  return params;
148 }
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 
193 MAKE_AVFILTERLINK_ACCESSOR(AVRational , frame_rate )
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 static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
205 {
206  BufferSinkContext *buf = ctx->priv;
207  AVBufferSinkParams *params = opaque;
208  int ret;
209 
210  if (params) {
211  if ((ret = av_opt_set_int_list(buf, "pix_fmts", params->pixel_fmts, AV_PIX_FMT_NONE, 0)) < 0)
212  return ret;
213  }
214 
215  return common_init(ctx);
216 }
217 
218 #define CHECK_LIST_SIZE(field) \
219  if (buf->field ## _size % sizeof(*buf->field)) { \
220  av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
221  "should be multiple of %d\n", \
222  buf->field ## _size, (int)sizeof(*buf->field)); \
223  return AVERROR(EINVAL); \
224  }
226 {
227  BufferSinkContext *buf = ctx->priv;
229  unsigned i;
230  int ret;
231 
233  if (buf->pixel_fmts_size) {
234  for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
235  if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0)
236  return ret;
237  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
238  return ret;
239  } else {
240  if ((ret = ff_default_query_formats(ctx)) < 0)
241  return ret;
242  }
243 
244  return 0;
245 }
246 
247 static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
248 {
249  BufferSinkContext *buf = ctx->priv;
250  AVABufferSinkParams *params = opaque;
251  int ret;
252 
253  if (params) {
254  if ((ret = av_opt_set_int_list(buf, "sample_fmts", params->sample_fmts, AV_SAMPLE_FMT_NONE, 0)) < 0 ||
255  (ret = av_opt_set_int_list(buf, "sample_rates", params->sample_rates, -1, 0)) < 0 ||
256  (ret = av_opt_set_int_list(buf, "channel_layouts", params->channel_layouts, -1, 0)) < 0 ||
257  (ret = av_opt_set_int_list(buf, "channel_counts", params->channel_counts, -1, 0)) < 0 ||
258  (ret = av_opt_set_int(buf, "all_channel_counts", params->all_channel_counts, 0)) < 0)
259  return ret;
260  }
261  return common_init(ctx);
262 }
263 
265 {
266  BufferSinkContext *buf = ctx->priv;
269  unsigned i;
270  int ret;
271 
276 
277  if (buf->sample_fmts_size) {
278  for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
279  if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0)
280  return ret;
281  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
282  return ret;
283  }
284 
285  if (buf->channel_layouts_size || buf->channel_counts_size ||
286  buf->all_channel_counts) {
287  for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
288  if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)
289  return ret;
290  for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
291  if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)
292  return ret;
293  if (buf->all_channel_counts) {
294  if (layouts)
295  av_log(ctx, AV_LOG_WARNING,
296  "Conflicting all_channel_counts and list in options\n");
297  else if (!(layouts = ff_all_channel_counts()))
298  return AVERROR(ENOMEM);
299  }
300  if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
301  return ret;
302  }
303 
304  if (buf->sample_rates_size) {
305  formats = NULL;
306  for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
307  if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0)
308  return ret;
309  if ((ret = ff_set_common_samplerates(ctx, formats)) < 0)
310  return ret;
311  }
312 
313  return 0;
314 }
315 
316 #define OFFSET(x) offsetof(BufferSinkContext, x)
317 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
318 static const AVOption buffersink_options[] = {
319  { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
320  { NULL },
321 };
322 #undef FLAGS
323 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
324 static const AVOption abuffersink_options[] = {
325  { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
326  { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS },
327  { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
328  { "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
329  { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
330  { NULL },
331 };
332 #undef FLAGS
333 
334 AVFILTER_DEFINE_CLASS(buffersink);
335 AVFILTER_DEFINE_CLASS(abuffersink);
336 
338  {
339  .name = "default",
340  .type = AVMEDIA_TYPE_VIDEO,
341  },
342  { NULL }
343 };
344 
346  .name = "buffersink",
347  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
348  .priv_size = sizeof(BufferSinkContext),
349  .priv_class = &buffersink_class,
350  .init_opaque = vsink_init,
351 
353  .activate = activate,
354  .inputs = avfilter_vsink_buffer_inputs,
355  .outputs = NULL,
356 };
357 
359  {
360  .name = "default",
361  .type = AVMEDIA_TYPE_AUDIO,
362  },
363  { NULL }
364 };
365 
367  .name = "abuffersink",
368  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
369  .priv_class = &abuffersink_class,
370  .priv_size = sizeof(BufferSinkContext),
371  .init_opaque = asink_init,
372 
374  .activate = activate,
375  .inputs = avfilter_asink_abuffer_inputs,
376  .outputs = NULL,
377 };
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:1481
#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
enum AVSampleFormat * sample_fmts
list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE
Definition: buffersink.c:50
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
AVBufferSinkParams * av_buffersink_params_alloc(void)
Create an AVBufferSinkParams structure.
Definition: buffersink.c:130
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
Main libavfilter public API header.
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:141
#define av_opt_set_int_list(obj, name, val, term, flags)
Set a binary option to an integer list.
Definition: opt.h:708
channels
Definition: aptx.c:30
int * sample_rates
list of accepted sample rates, terminated by -1
Definition: buffersink.c:57
static const AVOption abuffersink_options[]
Definition: buffersink.c:324
int * channel_counts
list of accepted channel counts, terminated by -1
Definition: buffersink.c:54
GLint GLenum type
Definition: opengl_enc.c:104
static int return_or_keep_frame(BufferSinkContext *buf, AVFrame *out, AVFrame *in, int flags)
Definition: buffersink.c:72
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:582
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
AVFrame * peeked_frame
Definition: buffersink.c:60
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample format(the sample packing is implied by the sample format) and sample rate.The lists are not just lists
void ff_inlink_request_frame(AVFilterLink *link)
Mark that a frame is wanted on the link.
Definition: avfilter.c:1607
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:355
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: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
static av_cold int vsink_init(AVFilterContext *ctx, void *opaque)
Definition: buffersink.c:204
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
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:443
static av_cold int asink_init(AVFilterContext *ctx, void *opaque)
Definition: buffersink.c:247
static const AVOption buffersink_options[]
Definition: buffersink.c:318
#define CHECK_LIST_SIZE(field)
Definition: buffersink.c:218
#define FLAGS
Definition: buffersink.c:323
#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:1436
static int vsink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:225
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
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
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:343
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
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:353
static int activate(AVFilterContext *ctx)
Definition: buffersink.c:158
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
Definition: opt.c:568
GLenum GLint * params
Definition: opengl_enc.c:113
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVFilterPad avfilter_asink_abuffer_inputs[]
Definition: buffersink.c:358
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:53
AVFilter ff_vsink_buffer
Definition: buffersink.c:345
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:119
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
Struct to use for initializing an abuffersink context.
Definition: buffersink.h:79
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:124
AVFormatContext * ctx
Definition: movenc.c:48
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
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:46
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:366
A list of supported channel layouts.
Definition: formats.h:85
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:597
sample_rate
int frame_size
Definition: mxfenc.c:2216
#define OFFSET(x)
Definition: buffersink.c:316
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:1500
void * buf
Definition: avisynth_c.h:766
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several inputs
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)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
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
they must not be accessed directly The fifo field contains the frames that are queued in the input for processing by the filter The status_in and status_out fields contains the queued status(EOF or error) of the link
#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:561
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
static int get_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags, int samples)
Definition: buffersink.c:86
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
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: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:264
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
Filter the word “frame” indicates either a video frame or a group of audio samples
#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:337
formats
Definition: signature.h:48
internal API functions
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition...
Definition: formats.c:410
#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:67
const int64_t * channel_layouts
list of allowed channel layouts, terminated by -1
Definition: buffersink.h:81
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:556