FFmpeg  4.3
buffersrc.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2008 Vitor Sessak
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  * memory buffer source filter
24  */
25 
26 #include <float.h>
27 
28 #include "libavutil/avassert.h"
30 #include "libavutil/common.h"
31 #include "libavutil/frame.h"
32 #include "libavutil/imgutils.h"
33 #include "libavutil/internal.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/samplefmt.h"
36 #include "libavutil/timestamp.h"
37 #include "audio.h"
38 #include "avfilter.h"
39 #include "buffersrc.h"
40 #include "formats.h"
41 #include "internal.h"
42 #include "video.h"
43 
44 typedef struct BufferSourceContext {
45  const AVClass *class;
46  AVRational time_base; ///< time_base to set in the output link
47  AVRational frame_rate; ///< frame_rate to set in the output link
49 
50  /* video only */
51  int w, h;
54 #if FF_API_SWS_PARAM_OPTION
55  char *sws_param;
56 #endif
57 
59 
60  /* audio only */
63  int channels;
64  uint64_t channel_layout;
66 
67  int eof;
69 
70 #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, pts)\
71  if (c->w != width || c->h != height || c->pix_fmt != format) {\
72  av_log(s, AV_LOG_INFO, "filter context - w: %d h: %d fmt: %d, incoming frame - w: %d h: %d fmt: %d pts_time: %s\n",\
73  c->w, c->h, c->pix_fmt, width, height, format, av_ts2timestr(pts, &s->outputs[0]->time_base));\
74  av_log(s, AV_LOG_WARNING, "Changing video frame properties on the fly is not supported by all filters.\n");\
75  }
76 
77 #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format, pts)\
78  if (c->sample_fmt != format || c->sample_rate != srate ||\
79  c->channel_layout != ch_layout || c->channels != ch_count) {\
80  av_log(s, AV_LOG_INFO, "filter context - fmt: %s r: %d layout: %"PRIX64" ch: %d, incoming frame - fmt: %s r: %d layout: %"PRIX64" ch: %d pts_time: %s\n",\
81  av_get_sample_fmt_name(c->sample_fmt), c->sample_rate, c->channel_layout, c->channels,\
82  av_get_sample_fmt_name(format), srate, ch_layout, ch_count, av_ts2timestr(pts, &s->outputs[0]->time_base));\
83  av_log(s, AV_LOG_ERROR, "Changing audio frame properties on the fly is not supported.\n");\
84  return AVERROR(EINVAL);\
85  }
86 
88 {
89  AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
90  if (!par)
91  return NULL;
92 
93  par->format = -1;
94 
95  return par;
96 }
97 
99 {
100  BufferSourceContext *s = ctx->priv;
101 
102  if (param->time_base.num > 0 && param->time_base.den > 0)
103  s->time_base = param->time_base;
104 
105  switch (ctx->filter->outputs[0].type) {
106  case AVMEDIA_TYPE_VIDEO:
107  if (param->format != AV_PIX_FMT_NONE) {
108  s->pix_fmt = param->format;
109  }
110  if (param->width > 0)
111  s->w = param->width;
112  if (param->height > 0)
113  s->h = param->height;
114  if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
115  s->pixel_aspect = param->sample_aspect_ratio;
116  if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
117  s->frame_rate = param->frame_rate;
118  if (param->hw_frames_ctx) {
121  if (!s->hw_frames_ctx)
122  return AVERROR(ENOMEM);
123  }
124  break;
125  case AVMEDIA_TYPE_AUDIO:
126  if (param->format != AV_SAMPLE_FMT_NONE) {
127  s->sample_fmt = param->format;
128  }
129  if (param->sample_rate > 0)
130  s->sample_rate = param->sample_rate;
131  if (param->channel_layout)
132  s->channel_layout = param->channel_layout;
133  break;
134  default:
135  return AVERROR_BUG;
136  }
137 
138  return 0;
139 }
140 
142 {
143  return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
145 }
146 
148 {
149  return av_buffersrc_add_frame_flags(ctx, frame, 0);
150 }
151 
153  AVFrame *frame, int flags);
154 
156 {
157  AVFrame *copy = NULL;
158  int ret = 0;
159 
160  if (frame && frame->channel_layout &&
162  av_log(ctx, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
163  return AVERROR(EINVAL);
164  }
165 
166  if (!(flags & AV_BUFFERSRC_FLAG_KEEP_REF) || !frame)
167  return av_buffersrc_add_frame_internal(ctx, frame, flags);
168 
169  if (!(copy = av_frame_alloc()))
170  return AVERROR(ENOMEM);
171  ret = av_frame_ref(copy, frame);
172  if (ret >= 0)
173  ret = av_buffersrc_add_frame_internal(ctx, copy, flags);
174 
175  av_frame_free(&copy);
176  return ret;
177 }
178 
179 static int push_frame(AVFilterGraph *graph)
180 {
181  int ret;
182 
183  while (1) {
184  ret = ff_filter_graph_run_once(graph);
185  if (ret == AVERROR(EAGAIN))
186  break;
187  if (ret < 0)
188  return ret;
189  }
190  return 0;
191 }
192 
194  AVFrame *frame, int flags)
195 {
196  BufferSourceContext *s = ctx->priv;
197  AVFrame *copy;
198  int refcounted, ret;
199 
200  s->nb_failed_requests = 0;
201 
202  if (!frame)
203  return av_buffersrc_close(ctx, AV_NOPTS_VALUE, flags);
204  if (s->eof)
205  return AVERROR(EINVAL);
206 
207  refcounted = !!frame->buf[0];
208 
209  if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
210 
211  switch (ctx->outputs[0]->type) {
212  case AVMEDIA_TYPE_VIDEO:
213  CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
214  frame->format, frame->pts);
215  break;
216  case AVMEDIA_TYPE_AUDIO:
217  /* For layouts unknown on input but known on link after negotiation. */
218  if (!frame->channel_layout)
219  frame->channel_layout = s->channel_layout;
220  CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->channel_layout,
221  frame->channels, frame->format, frame->pts);
222  break;
223  default:
224  return AVERROR(EINVAL);
225  }
226 
227  }
228 
229  if (!(copy = av_frame_alloc()))
230  return AVERROR(ENOMEM);
231 
232  if (refcounted) {
233  av_frame_move_ref(copy, frame);
234  } else {
235  ret = av_frame_ref(copy, frame);
236  if (ret < 0) {
237  av_frame_free(&copy);
238  return ret;
239  }
240  }
241 
242  ret = ff_filter_frame(ctx->outputs[0], copy);
243  if (ret < 0)
244  return ret;
245 
246  if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
247  ret = push_frame(ctx->graph);
248  if (ret < 0)
249  return ret;
250  }
251 
252  return 0;
253 }
254 
255 int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
256 {
257  BufferSourceContext *s = ctx->priv;
258 
259  s->eof = 1;
261  return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
262 }
263 
265 {
266  BufferSourceContext *c = ctx->priv;
267 
268  if (c->pix_fmt == AV_PIX_FMT_NONE || !c->w || !c->h ||
269  av_q2d(c->time_base) <= 0) {
270  av_log(ctx, AV_LOG_ERROR, "Invalid parameters provided.\n");
271  return AVERROR(EINVAL);
272  }
273 
274  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d\n",
275  c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
278 
279 #if FF_API_SWS_PARAM_OPTION
280  if (c->sws_param)
281  av_log(ctx, AV_LOG_WARNING, "sws_param option is deprecated and ignored\n");
282 #endif
283 
284  return 0;
285 }
286 
288 {
289  return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
290 }
291 
292 #define OFFSET(x) offsetof(BufferSourceContext, x)
293 #define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
294 #define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
295 
296 static const AVOption buffer_options[] = {
297  { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
298  { "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V },
299  { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
300  { "pix_fmt", NULL, OFFSET(pix_fmt), AV_OPT_TYPE_PIXEL_FMT, { .i64 = AV_PIX_FMT_NONE }, .min = AV_PIX_FMT_NONE, .max = INT_MAX, .flags = V },
301  { "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
302  { "pixel_aspect", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
303  { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
304  { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
305 #if FF_API_SWS_PARAM_OPTION
306  { "sws_param", NULL, OFFSET(sws_param), AV_OPT_TYPE_STRING, .flags = V },
307 #endif
308  { NULL },
309 };
310 
312 
313 static const AVOption abuffer_options[] = {
314  { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
315  { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
316  { "sample_fmt", NULL, OFFSET(sample_fmt), AV_OPT_TYPE_SAMPLE_FMT, { .i64 = AV_SAMPLE_FMT_NONE }, .min = AV_SAMPLE_FMT_NONE, .max = INT_MAX, .flags = A },
317  { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
318  { "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
319  { NULL },
320 };
321 
322 AVFILTER_DEFINE_CLASS(abuffer);
323 
325 {
326  BufferSourceContext *s = ctx->priv;
327  int ret = 0;
328 
329  if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
330  av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
331  return AVERROR(EINVAL);
332  }
333 
334  if (s->channel_layout_str || s->channel_layout) {
335  int n;
336 
337  if (!s->channel_layout) {
339  if (!s->channel_layout) {
340  av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
341  s->channel_layout_str);
342  return AVERROR(EINVAL);
343  }
344  }
346  if (s->channels) {
347  if (n != s->channels) {
348  av_log(ctx, AV_LOG_ERROR,
349  "Mismatching channel count %d and layout '%s' "
350  "(%d channels)\n",
351  s->channels, s->channel_layout_str, n);
352  return AVERROR(EINVAL);
353  }
354  }
355  s->channels = n;
356  } else if (!s->channels) {
357  av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
358  "channel layout specified\n");
359  return AVERROR(EINVAL);
360  }
361 
362  if (!s->time_base.num)
363  s->time_base = (AVRational){1, s->sample_rate};
364 
365  av_log(ctx, AV_LOG_VERBOSE,
366  "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
369 
370  return ret;
371 }
372 
373 static av_cold void uninit(AVFilterContext *ctx)
374 {
375  BufferSourceContext *s = ctx->priv;
377 }
378 
380 {
381  BufferSourceContext *c = ctx->priv;
384  AVFilterFormats *samplerates = NULL;
385  int ret;
386 
387  switch (ctx->outputs[0]->type) {
388  case AVMEDIA_TYPE_VIDEO:
389  if ((ret = ff_add_format (&formats, c->pix_fmt)) < 0 ||
390  (ret = ff_set_common_formats (ctx , formats )) < 0)
391  return ret;
392  break;
393  case AVMEDIA_TYPE_AUDIO:
394  if ((ret = ff_add_format (&formats , c->sample_fmt )) < 0 ||
395  (ret = ff_set_common_formats (ctx , formats )) < 0 ||
396  (ret = ff_add_format (&samplerates, c->sample_rate)) < 0 ||
397  (ret = ff_set_common_samplerates (ctx , samplerates )) < 0)
398  return ret;
399 
400  if ((ret = ff_add_channel_layout(&channel_layouts,
402  FF_COUNT2LAYOUT(c->channels))) < 0)
403  return ret;
404  if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
405  return ret;
406  break;
407  default:
408  return AVERROR(EINVAL);
409  }
410 
411  return 0;
412 }
413 
414 static int config_props(AVFilterLink *link)
415 {
416  BufferSourceContext *c = link->src->priv;
417 
418  switch (link->type) {
419  case AVMEDIA_TYPE_VIDEO:
420  link->w = c->w;
421  link->h = c->h;
423 
424  if (c->hw_frames_ctx) {
426  if (!link->hw_frames_ctx)
427  return AVERROR(ENOMEM);
428  }
429  break;
430  case AVMEDIA_TYPE_AUDIO:
431  if (!c->channel_layout)
432  c->channel_layout = link->channel_layout;
433  break;
434  default:
435  return AVERROR(EINVAL);
436  }
437 
438  link->time_base = c->time_base;
439  link->frame_rate = c->frame_rate;
440  return 0;
441 }
442 
443 static int request_frame(AVFilterLink *link)
444 {
445  BufferSourceContext *c = link->src->priv;
446 
447  if (c->eof)
448  return AVERROR_EOF;
449  c->nb_failed_requests++;
450  return AVERROR(EAGAIN);
451 }
452 
454  {
455  .name = "default",
456  .type = AVMEDIA_TYPE_VIDEO,
457  .request_frame = request_frame,
458  .config_props = config_props,
459  },
460  { NULL }
461 };
462 
464  .name = "buffer",
465  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
466  .priv_size = sizeof(BufferSourceContext),
468 
469  .init = init_video,
470  .uninit = uninit,
471 
472  .inputs = NULL,
473  .outputs = avfilter_vsrc_buffer_outputs,
474  .priv_class = &buffer_class,
475 };
476 
478  {
479  .name = "default",
480  .type = AVMEDIA_TYPE_AUDIO,
481  .request_frame = request_frame,
482  .config_props = config_props,
483  },
484  { NULL }
485 };
486 
488  .name = "abuffer",
489  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
490  .priv_size = sizeof(BufferSourceContext),
492 
493  .init = init_audio,
494  .uninit = uninit,
495 
496  .inputs = NULL,
497  .outputs = avfilter_asrc_abuffer_outputs,
498  .priv_class = &abuffer_class,
499 };
#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:581
static void copy(const float *p1, float *p2, const int length)
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it...
Definition: buffer.c:125
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, ch_count, format, pts)
Definition: buffersrc.c:77
AVOption.
Definition: opt.h:246
AVRational pixel_aspect
Definition: buffersrc.c:53
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
Main libavfilter public API header.
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:491
Memory buffer source API.
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int num
Numerator.
Definition: rational.h:59
Do not check for format changes.
Definition: buffersrc.h:41
static av_cold int init_video(AVFilterContext *ctx)
Definition: buffersrc.c:264
static const AVFilterPad avfilter_vsrc_buffer_outputs[]
Definition: buffersrc.c:453
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:65
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:583
enum AVPixelFormat pix_fmt
Definition: buffersrc.c:52
static av_cold void uninit(AVFilterContext *ctx)
Definition: buffersrc.c:373
AVRational frame_rate
Video only, the frame rate of the input video.
Definition: buffersrc.h:100
#define OFFSET(x)
Definition: buffersrc.c:292
AVFilter ff_asrc_abuffer
Definition: buffersrc.c:487
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:355
const char * name
Pad name.
Definition: internal.h:60
AVRational sample_aspect_ratio
Video only, the sample (pixel) aspect ratio.
Definition: buffersrc.h:92
uint64_t av_get_channel_layout(const char *name)
Return a channel layout id that matches name, or 0 if no match is found.
int ff_filter_graph_run_once(AVFilterGraph *graph)
Run one round of processing on a filter graph.
static const AVOption abuffer_options[]
Definition: buffersrc.c:313
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
static char buffer[20]
Definition: seek.c:32
#define av_cold
Definition: attributes.h:88
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:190
AVOptions.
timestamp utils, mostly useful for debugging/logging purposes
AVRational time_base
The timebase to be used for the timestamps on the input frames.
Definition: buffersrc.h:82
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
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:393
#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, pts)
Definition: buffersrc.c:70
static AVFrame * frame
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
int sample_rate
Audio only, the audio sampling rate in samples per second.
Definition: buffersrc.h:111
static const AVFilterPad avfilter_asrc_abuffer_outputs[]
Definition: buffersrc.c:477
channels
Definition: aptx.h:33
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
int width
Definition: frame.h:358
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:600
int ff_add_channel_layout(AVFilterChannelLayouts **l, uint64_t channel_layout)
Definition: formats.c:342
#define AVERROR(e)
Definition: error.h:43
uint64_t channel_layout
Audio only, the audio channel layout.
Definition: buffersrc.h:116
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
static int request_frame(AVFilterLink *link)
Definition: buffersrc.c:443
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
void * priv
private data for use by the filter
Definition: avfilter.h:353
int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
Close the buffer source after EOF.
Definition: buffersrc.c:255
#define A
Definition: buffersrc.c:293
simple assert() macros that are a bit more flexible than ISO C assert().
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:239
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:336
AVRational time_base
time_base to set in the output link
Definition: buffersrc.c:46
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
Definition: samplefmt.c:49
int format
video: the pixel format, value corresponds to enum AVPixelFormat audio: the sample format...
Definition: buffersrc.h:78
AVRational frame_rate
frame_rate to set in the output link
Definition: buffersrc.c:47
reference-counted frame API
uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:477
common internal API header
AVFILTER_DEFINE_CLASS(buffer)
int channels
number of audio channels, only used for audio.
Definition: frame.h:606
audio channel layout utility functions
This structure contains the parameters describing the frames that will be passed to this filter...
Definition: buffersrc.h:73
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static av_cold int init_audio(AVFilterContext *ctx)
Definition: buffersrc.c:324
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
A list of supported channel layouts.
Definition: formats.h:85
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...
Definition: frame.h:373
#define attribute_align_arg
Definition: internal.h:62
AVBufferRef * hw_frames_ctx
Video with a hwaccel pixel format only.
Definition: buffersrc.h:106
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static const AVOption buffer_options[]
Definition: buffersrc.c:296
#define V
Definition: buffersrc.c:294
Immediately push the frame to the output.
Definition: buffersrc.h:46
static int push_frame(AVFilterGraph *graph)
Definition: buffersrc.c:179
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:50
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
Describe the class of an AVClass context structure.
Definition: log.h:67
int sample_rate
Sample rate of the audio data.
Definition: frame.h:472
Filter definition.
Definition: avfilter.h:144
Rational number (pair of numerator and denominator).
Definition: rational.h:58
static int config_props(AVFilterLink *link)
Definition: buffersrc.c:414
const char * name
Filter name.
Definition: avfilter.h:148
static int av_buffersrc_add_frame_internal(AVFilterContext *ctx, AVFrame *frame, int flags)
Definition: buffersrc.c:193
offset must point to two consecutive integers
Definition: opt.h:233
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
Get the number of failed requests.
Definition: buffersrc.c:287
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
uint64_t channel_layout
Definition: buffersrc.c:64
Keep a reference to the frame.
Definition: buffersrc.h:53
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:564
AVBufferRef * hw_frames_ctx
Definition: buffersrc.c:58
int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
Add a frame to the buffer source.
Definition: buffersrc.c:141
AVFilter ff_vsrc_buffer
Definition: buffersrc.c:463
A reference to a data buffer.
Definition: buffer.h:81
common internal and external API header
static double c[64]
int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
Initialize the buffersrc or abuffersrc filter with the provided parameters.
Definition: buffersrc.c:98
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:93
int den
Denominator.
Definition: rational.h:60
int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
Add a frame to the buffer source.
Definition: buffersrc.c:155
unsigned nb_failed_requests
Definition: buffersrc.c:48
enum AVSampleFormat sample_fmt
Definition: buffersrc.c:62
static int query_formats(AVFilterContext *ctx)
Definition: buffersrc.c:379
A list of supported formats for one end of a filter link.
Definition: formats.h:64
AVBufferSrcParameters * av_buffersrc_parameters_alloc(void)
Allocate a new AVBufferSrcParameters instance.
Definition: buffersrc.c:87
void ff_avfilter_link_set_in_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
Definition: avfilter.c:211
An instance of a filter.
Definition: avfilter.h:338
int height
Definition: frame.h:358
const AVFilterPad * outputs
List of outputs, terminated by a zeroed element.
Definition: avfilter.h:172
#define FF_COUNT2LAYOUT(c)
Encode a channel count as a channel layout.
Definition: formats.h:102
int width
Video only, the display dimensions of the input frames.
Definition: buffersrc.h:87
formats
Definition: signature.h:48
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
Definition: pixdesc.c:2465
internal API functions
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
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:588
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
Add a frame to the buffer source.
Definition: buffersrc.c:147
char * channel_layout_str
Definition: buffersrc.c:65