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 
66 {
67  BufferSinkContext *buf = ctx->priv;
68  int nb_layouts = NB_ITEMS(buf->channel_layouts);
69  int nb_counts = NB_ITEMS(buf->channel_counts);
70  uint64_t counts = 0;
71  int i, lc, n;
72 
73  for (i = 0; i < nb_counts; i++)
74  if (buf->channel_counts[i] < 64)
75  counts |= (uint64_t)1 << buf->channel_counts[i];
76  for (i = lc = 0; i < nb_layouts; i++) {
78  if (n < 64 && (counts & ((uint64_t)1 << n)))
80  "Removing channel layout 0x%"PRIx64", redundant with %d channels\n",
81  buf->channel_layouts[i], n);
82  else
83  buf->channel_layouts[lc++] = buf->channel_layouts[i];
84  }
85  buf->channel_layouts_size = lc * sizeof(*buf->channel_layouts);
86 }
87 
89 {
90  return av_buffersink_get_frame_flags(ctx, frame, 0);
91 }
92 
94 {
95  if ((flags & AV_BUFFERSINK_FLAG_PEEK)) {
96  buf->peeked_frame = in;
97  return out ? av_frame_ref(out, in) : 0;
98  } else {
99  av_assert1(out);
100  buf->peeked_frame = NULL;
101  av_frame_move_ref(out, in);
102  av_frame_free(&in);
103  return 0;
104  }
105 }
106 
108 {
109  BufferSinkContext *buf = ctx->priv;
110  AVFilterLink *inlink = ctx->inputs[0];
111  int status, ret;
112  AVFrame *cur_frame;
113  int64_t pts;
114 
115  if (buf->peeked_frame)
116  return return_or_keep_frame(buf, frame, buf->peeked_frame, flags);
117 
118  while (1) {
119  ret = samples ? ff_inlink_consume_samples(inlink, samples, samples, &cur_frame) :
120  ff_inlink_consume_frame(inlink, &cur_frame);
121  if (ret < 0) {
122  return ret;
123  } else if (ret) {
124  /* TODO return the frame instead of copying it */
125  return return_or_keep_frame(buf, frame, cur_frame, flags);
126  } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
127  return status;
128  } else if ((flags & AV_BUFFERSINK_FLAG_NO_REQUEST)) {
129  return AVERROR(EAGAIN);
130  } else if (inlink->frame_wanted_out) {
131  ret = ff_filter_graph_run_once(ctx->graph);
132  if (ret < 0)
133  return ret;
134  } else {
135  ff_inlink_request_frame(inlink);
136  }
137  }
138 }
139 
141 {
142  return get_frame_internal(ctx, frame, flags, ctx->inputs[0]->min_samples);
143 }
144 
146  AVFrame *frame, int nb_samples)
147 {
148  return get_frame_internal(ctx, frame, 0, nb_samples);
149 }
150 
151 #if FF_API_NEXT
152 AVBufferSinkParams *av_buffersink_params_alloc(void)
153 {
154  static const int pixel_fmts[] = { AV_PIX_FMT_NONE };
155  AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams));
156  if (!params)
157  return NULL;
158 
159  params->pixel_fmts = pixel_fmts;
160  return params;
161 }
162 
163 AVABufferSinkParams *av_abuffersink_params_alloc(void)
164 {
165  AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams));
166 
167  if (!params)
168  return NULL;
169  return params;
170 }
171 #endif
172 
174 {
175  BufferSinkContext *buf = ctx->priv;
176 
177  buf->warning_limit = 100;
178  return 0;
179 }
180 
182 {
183  BufferSinkContext *buf = ctx->priv;
184 
185  if (buf->warning_limit &&
186  ff_framequeue_queued_frames(&ctx->inputs[0]->fifo) >= buf->warning_limit) {
187  av_log(ctx, AV_LOG_WARNING,
188  "%d buffers queued in %s, something may be wrong.\n",
189  buf->warning_limit,
190  (char *)av_x_if_null(ctx->name, ctx->filter->name));
191  buf->warning_limit *= 10;
192  }
193 
194  /* The frame is queued, the rest is up to get_frame_internal */
195  return 0;
196 }
197 
199 {
200  AVFilterLink *inlink = ctx->inputs[0];
201 
202  inlink->min_samples = inlink->max_samples =
203  inlink->partial_buf_size = frame_size;
204 }
205 
206 #define MAKE_AVFILTERLINK_ACCESSOR(type, field) \
207 type av_buffersink_get_##field(const AVFilterContext *ctx) { \
208  av_assert0(ctx->filter->activate == activate); \
209  return ctx->inputs[0]->field; \
210 }
211 
215 
216 MAKE_AVFILTERLINK_ACCESSOR(AVRational , frame_rate )
219 MAKE_AVFILTERLINK_ACCESSOR(AVRational , sample_aspect_ratio)
220 
222 MAKE_AVFILTERLINK_ACCESSOR(uint64_t , channel_layout )
224 
225 MAKE_AVFILTERLINK_ACCESSOR(AVBufferRef * , hw_frames_ctx )
226 
227 #define CHECK_LIST_SIZE(field) \
228  if (buf->field ## _size % sizeof(*buf->field)) { \
229  av_log(ctx, AV_LOG_ERROR, "Invalid size for " #field ": %d, " \
230  "should be multiple of %d\n", \
231  buf->field ## _size, (int)sizeof(*buf->field)); \
232  return AVERROR(EINVAL); \
233  }
235 {
236  BufferSinkContext *buf = ctx->priv;
238  unsigned i;
239  int ret;
240 
242  if (buf->pixel_fmts_size) {
243  for (i = 0; i < NB_ITEMS(buf->pixel_fmts); i++)
244  if ((ret = ff_add_format(&formats, buf->pixel_fmts[i])) < 0)
245  return ret;
246  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
247  return ret;
248  } else {
249  if ((ret = ff_default_query_formats(ctx)) < 0)
250  return ret;
251  }
252 
253  return 0;
254 }
255 
257 {
258  BufferSinkContext *buf = ctx->priv;
261  unsigned i;
262  int ret;
263 
268 
269  if (buf->sample_fmts_size) {
270  for (i = 0; i < NB_ITEMS(buf->sample_fmts); i++)
271  if ((ret = ff_add_format(&formats, buf->sample_fmts[i])) < 0)
272  return ret;
273  if ((ret = ff_set_common_formats(ctx, formats)) < 0)
274  return ret;
275  }
276 
277  if (buf->channel_layouts_size || buf->channel_counts_size ||
278  buf->all_channel_counts) {
280  for (i = 0; i < NB_ITEMS(buf->channel_layouts); i++)
281  if ((ret = ff_add_channel_layout(&layouts, buf->channel_layouts[i])) < 0)
282  return ret;
283  for (i = 0; i < NB_ITEMS(buf->channel_counts); i++)
284  if ((ret = ff_add_channel_layout(&layouts, FF_COUNT2LAYOUT(buf->channel_counts[i]))) < 0)
285  return ret;
286  if (buf->all_channel_counts) {
287  if (layouts)
288  av_log(ctx, AV_LOG_WARNING,
289  "Conflicting all_channel_counts and list in options\n");
290  else if (!(layouts = ff_all_channel_counts()))
291  return AVERROR(ENOMEM);
292  }
293  if ((ret = ff_set_common_channel_layouts(ctx, layouts)) < 0)
294  return ret;
295  }
296 
297  if (buf->sample_rates_size) {
298  formats = NULL;
299  for (i = 0; i < NB_ITEMS(buf->sample_rates); i++)
300  if ((ret = ff_add_format(&formats, buf->sample_rates[i])) < 0)
301  return ret;
302  if ((ret = ff_set_common_samplerates(ctx, formats)) < 0)
303  return ret;
304  }
305 
306  return 0;
307 }
308 
309 #define OFFSET(x) offsetof(BufferSinkContext, x)
310 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
311 static const AVOption buffersink_options[] = {
312  { "pix_fmts", "set the supported pixel formats", OFFSET(pixel_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
313  { NULL },
314 };
315 #undef FLAGS
316 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
317 static const AVOption abuffersink_options[] = {
318  { "sample_fmts", "set the supported sample formats", OFFSET(sample_fmts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
319  { "sample_rates", "set the supported sample rates", OFFSET(sample_rates), AV_OPT_TYPE_BINARY, .flags = FLAGS },
320  { "channel_layouts", "set the supported channel layouts", OFFSET(channel_layouts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
321  { "channel_counts", "set the supported channel counts", OFFSET(channel_counts), AV_OPT_TYPE_BINARY, .flags = FLAGS },
322  { "all_channel_counts", "accept all channel counts", OFFSET(all_channel_counts), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
323  { NULL },
324 };
325 #undef FLAGS
326 
327 AVFILTER_DEFINE_CLASS(buffersink);
328 AVFILTER_DEFINE_CLASS(abuffersink);
329 
331  {
332  .name = "default",
333  .type = AVMEDIA_TYPE_VIDEO,
334  },
335  { NULL }
336 };
337 
339  .name = "buffersink",
340  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."),
341  .priv_size = sizeof(BufferSinkContext),
342  .priv_class = &buffersink_class,
343  .init = common_init,
345  .activate = activate,
346  .inputs = avfilter_vsink_buffer_inputs,
347  .outputs = NULL,
348 };
349 
351  {
352  .name = "default",
353  .type = AVMEDIA_TYPE_AUDIO,
354  },
355  { NULL }
356 };
357 
359  .name = "abuffersink",
360  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
361  .priv_class = &abuffersink_class,
362  .priv_size = sizeof(BufferSinkContext),
363  .init = common_init,
365  .activate = activate,
366  .inputs = avfilter_asink_abuffer_inputs,
367  .outputs = NULL,
368 };
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:1489
#define NULL
Definition: coverity.c:32
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:314
AVOption.
Definition: opt.h:248
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
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:317
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:93
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:569
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:237
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:1615
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
struct AVFilterGraph * graph
filtergraph this filter belongs to
Definition: avfilter.h:358
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:349
char * name
name of this filter instance
Definition: avfilter.h:346
#define av_cold
Definition: attributes.h:88
#define av_malloc(s)
AVOptions.
AVBufferSinkParams * av_buffersink_params_alloc(void)
Definition: buffersink.c:152
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 const AVOption buffersink_options[]
Definition: buffersink.c:311
#define CHECK_LIST_SIZE(field)
Definition: buffersink.c:227
channels
Definition: aptx.h:33
#define FLAGS
Definition: buffersink.c:316
#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:96
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:1444
static int vsink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:234
AVABufferSinkParams * av_abuffersink_params_alloc(void)
Definition: buffersink.c:163
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:588
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:339
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:153
void * priv
private data for use by the filter
Definition: avfilter.h:356
static int activate(AVFilterContext *ctx)
Definition: buffersink.c:181
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:350
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:333
int channel_layouts_size
Definition: buffersink.c:53
static void cleanup_redundant_layouts(AVFilterContext *ctx)
Definition: buffersink.c:65
AVFilter ff_vsink_buffer
Definition: buffersink.c:338
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:140
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:145
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
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:231
AVFilter ff_asink_abuffer
Definition: buffersink.c:358
A list of supported channel layouts.
Definition: formats.h:86
int ff_default_query_formats(AVFilterContext *ctx)
Definition: formats.c:594
sample_rate
int frame_size
Definition: mxfenc.c:2166
#define OFFSET(x)
Definition: buffersink.c:309
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:1508
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
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:145
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:149
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:560
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:107
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:198
static av_cold int common_init(AVFilterContext *ctx)
Definition: buffersink.c:173
#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:89
static int asink_query_formats(AVFilterContext *ctx)
Definition: buffersink.c:256
A list of supported formats for one end of a filter link.
Definition: formats.h:65
An instance of a filter.
Definition: avfilter.h:341
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:103
static const AVFilterPad avfilter_vsink_buffer_inputs[]
Definition: buffersink.c:330
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:437
#define MAKE_AVFILTERLINK_ACCESSOR(type, field)
Definition: buffersink.c:206
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:88
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:344
for(j=16;j >0;--j)
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:576
int i
Definition: input.c:407