FFmpeg
buffersrc.c
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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 
29 #include "libavutil/common.h"
30 #include "libavutil/frame.h"
31 #include "libavutil/hwcontext.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 "filters.h"
41 #include "formats.h"
42 #include "internal.h"
43 #include "video.h"
44 
45 typedef struct BufferSourceContext {
46  const AVClass *class;
47  AVRational time_base; ///< time_base to set in the output link
48  AVRational frame_rate; ///< frame_rate to set in the output link
50 
51  /* video only */
52  int w, h, prev_w, prev_h;
54  enum AVColorSpace color_space, prev_color_space;
57 
59 
60  /* audio only */
63  int channels;
66 
67  int eof;
68  int64_t last_pts;
71 
72 #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, csp, range, pts)\
73  c->link_delta = c->w != width || c->h != height || c->pix_fmt != format ||\
74  c->color_space != csp || c->color_range != range;\
75  c->prev_delta = c->prev_w != width || c->prev_h != height || c->prev_pix_fmt != format ||\
76  c->prev_color_space != csp || c->prev_color_range != range;\
77  if (c->link_delta) {\
78  int loglevel = c->prev_delta ? AV_LOG_WARNING : AV_LOG_DEBUG;\
79  av_log(s, loglevel, "Changing video frame properties on the fly is not supported by all filters.\n");\
80  av_log(s, loglevel, "filter context - w: %d h: %d fmt: %d csp: %s range: %s, incoming frame - w: %d h: %d fmt: %d csp: %s range: %s pts_time: %s\n",\
81  c->w, c->h, c->pix_fmt, av_color_space_name(c->color_space), av_color_range_name(c->color_range),\
82  width, height, format, av_color_space_name(csp), av_color_range_name(range),\
83  av_ts2timestr(pts, &s->outputs[0]->time_base));\
84  }\
85  if (c->prev_delta) {\
86  if (!c->link_delta)\
87  av_log(s, AV_LOG_VERBOSE, "video frame properties congruent with link at pts_time: %s\n", av_ts2timestr(pts, &s->outputs[0]->time_base));\
88  c->prev_w = width;\
89  c->prev_h = height;\
90  c->prev_pix_fmt = format;\
91  c->prev_color_space = csp;\
92  c->prev_color_range = range;\
93  }
94 
95 #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, layout, format, pts)\
96  if (c->sample_fmt != format || c->sample_rate != srate ||\
97  av_channel_layout_compare(&c->ch_layout, &layout) || c->channels != layout.nb_channels) {\
98  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",\
99  av_get_sample_fmt_name(c->sample_fmt), c->sample_rate, c->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ? c->ch_layout.u.mask : 0, c->channels,\
100  av_get_sample_fmt_name(format), srate, layout.order == AV_CHANNEL_ORDER_NATIVE ? layout.u.mask : 0, layout.nb_channels, av_ts2timestr(pts, &s->outputs[0]->time_base));\
101  av_log(s, AV_LOG_ERROR, "Changing audio frame properties on the fly is not supported.\n");\
102  return AVERROR(EINVAL);\
103  }
104 
106 {
107  AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
108  if (!par)
109  return NULL;
110 
111  par->format = -1;
114 
115  return par;
116 }
117 
119 {
120  BufferSourceContext *s = ctx->priv;
121 
122  if (param->time_base.num > 0 && param->time_base.den > 0)
123  s->time_base = param->time_base;
124 
125  switch (ctx->filter->outputs[0].type) {
126  case AVMEDIA_TYPE_VIDEO:
127  if (param->format != AV_PIX_FMT_NONE) {
128  s->pix_fmt = s->prev_pix_fmt = param->format;
129  }
130  if (param->width > 0)
131  s->w = s->prev_w = param->width;
132  if (param->height > 0)
133  s->h = s->prev_h = param->height;
134  if (param->sample_aspect_ratio.num > 0 && param->sample_aspect_ratio.den > 0)
135  s->pixel_aspect = param->sample_aspect_ratio;
136  if (param->frame_rate.num > 0 && param->frame_rate.den > 0)
137  s->frame_rate = param->frame_rate;
138  if (param->hw_frames_ctx) {
139  av_buffer_unref(&s->hw_frames_ctx);
140  s->hw_frames_ctx = av_buffer_ref(param->hw_frames_ctx);
141  if (!s->hw_frames_ctx)
142  return AVERROR(ENOMEM);
143  }
144  if (param->color_space != AVCOL_SPC_UNSPECIFIED)
145  s->color_space = s->prev_color_space = param->color_space;
146  if (param->color_range != AVCOL_RANGE_UNSPECIFIED)
147  s->color_range = s->prev_color_range = param->color_range;
148  break;
149  case AVMEDIA_TYPE_AUDIO:
150  if (param->format != AV_SAMPLE_FMT_NONE) {
151  s->sample_fmt = param->format;
152  }
153  if (param->sample_rate > 0)
154  s->sample_rate = param->sample_rate;
155 #if FF_API_OLD_CHANNEL_LAYOUT
157  // if the old/new fields are set inconsistently, prefer the old ones
158  if (param->channel_layout && (param->ch_layout.order != AV_CHANNEL_ORDER_NATIVE ||
159  param->ch_layout.u.mask != param->channel_layout)) {
160  av_channel_layout_uninit(&s->ch_layout);
161  av_channel_layout_from_mask(&s->ch_layout, param->channel_layout);
163  } else
164 #endif
165  if (param->ch_layout.nb_channels) {
166  int ret = av_channel_layout_copy(&s->ch_layout, &param->ch_layout);
167  if (ret < 0)
168  return ret;
169  }
170  break;
171  default:
172  return AVERROR_BUG;
173  }
174 
175  return 0;
176 }
177 
179 {
182 }
183 
185 {
187 }
188 
189 static int push_frame(AVFilterGraph *graph)
190 {
191  int ret;
192 
193  while (1) {
194  ret = ff_filter_graph_run_once(graph);
195  if (ret == AVERROR(EAGAIN))
196  break;
197  if (ret < 0)
198  return ret;
199  }
200  return 0;
201 }
202 
204 {
205  BufferSourceContext *s = ctx->priv;
206  AVFrame *copy;
207  int refcounted, ret;
208 
209 #if FF_API_OLD_CHANNEL_LAYOUT
211  if (frame && frame->channel_layout &&
213  av_log(ctx, AV_LOG_ERROR, "Layout indicates a different number of channels than actually present\n");
214  return AVERROR(EINVAL);
215  }
217 #endif
218 
219  s->nb_failed_requests = 0;
220 
221  if (!frame)
222  return av_buffersrc_close(ctx, s->last_pts, flags);
223  if (s->eof)
224  return AVERROR_EOF;
225 
226  s->last_pts = frame->pts + frame->duration;
227 
228  refcounted = !!frame->buf[0];
229 
231 
232  switch (ctx->outputs[0]->type) {
233  case AVMEDIA_TYPE_VIDEO:
237  break;
238  case AVMEDIA_TYPE_AUDIO:
239  /* For layouts unknown on input but known on link after negotiation. */
240 #if FF_API_OLD_CHANNEL_LAYOUT
242  if (!frame->channel_layout)
243  frame->channel_layout = s->ch_layout.order == AV_CHANNEL_ORDER_NATIVE ?
244  s->ch_layout.u.mask : 0;
246 #endif
248  ret = av_channel_layout_copy(&frame->ch_layout, &s->ch_layout);
249  if (ret < 0)
250  return ret;
251  }
253  frame->format, frame->pts);
254  break;
255  default:
256  return AVERROR(EINVAL);
257  }
258 
259  }
260 
261  if (refcounted && !(flags & AV_BUFFERSRC_FLAG_KEEP_REF)) {
262  if (!(copy = av_frame_alloc()))
263  return AVERROR(ENOMEM);
265  } else {
267  if (!copy)
268  return AVERROR(ENOMEM);
269  }
270 
271 #if FF_API_PKT_DURATION
273  if (copy->pkt_duration && copy->pkt_duration != copy->duration)
274  copy->duration = copy->pkt_duration;
276 #endif
277 
278 #if FF_API_INTERLACED_FRAME
280  if (copy->interlaced_frame)
281  copy->flags |= AV_FRAME_FLAG_INTERLACED;
282  if (copy->top_field_first)
285 #endif
286 
287 #if FF_API_FRAME_KEY
289  if (copy->key_frame)
290  copy->flags |= AV_FRAME_FLAG_KEY;
292 #endif
293 
294  if (copy->colorspace == AVCOL_SPC_UNSPECIFIED)
295  copy->colorspace = ctx->outputs[0]->colorspace;
296  if (copy->color_range == AVCOL_RANGE_UNSPECIFIED)
297  copy->color_range = ctx->outputs[0]->color_range;
298 
299  ret = ff_filter_frame(ctx->outputs[0], copy);
300  if (ret < 0)
301  return ret;
302 
303  if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
304  ret = push_frame(ctx->graph);
305  if (ret < 0)
306  return ret;
307  }
308 
309  return 0;
310 }
311 
313 {
314  BufferSourceContext *s = ctx->priv;
315 
316  s->eof = 1;
318  return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
319 }
320 
322 {
323  BufferSourceContext *c = ctx->priv;
324 
325  if (c->pix_fmt == AV_PIX_FMT_NONE) {
326  av_log(ctx, AV_LOG_ERROR, "Unspecified pixel format\n");
327  return AVERROR(EINVAL);
328  }
329  if (c->w <= 0 || c->h <= 0) {
330  av_log(ctx, AV_LOG_ERROR, "Invalid size %dx%d\n", c->w, c->h);
331  return AVERROR(EINVAL);
332  }
333  if (av_q2d(c->time_base) <= 0) {
334  av_log(ctx, AV_LOG_ERROR, "Invalid time base %d/%d\n", c->time_base.num, c->time_base.den);
335  return AVERROR(EINVAL);
336  }
337 
338  av_log(ctx, AV_LOG_VERBOSE, "w:%d h:%d pixfmt:%s tb:%d/%d fr:%d/%d sar:%d/%d csp:%s range:%s\n",
339  c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
340  c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
341  c->pixel_aspect.num, c->pixel_aspect.den,
342  av_color_space_name(c->color_space), av_color_range_name(c->color_range));
343 
344  return 0;
345 }
346 
348 {
349  return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
350 }
351 
352 #define OFFSET(x) offsetof(BufferSourceContext, x)
353 #define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
354 #define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
355 
356 static const AVOption buffer_options[] = {
357  { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
358  { "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V },
359  { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
360  { "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 },
361  { "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
362  { "pixel_aspect", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
363  { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
364  { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
365  { "colorspace", "select colorspace", OFFSET(color_space), AV_OPT_TYPE_INT, {.i64=AVCOL_SPC_UNSPECIFIED}, 0, AVCOL_SPC_NB-1, V, .unit = "colorspace"},
366  { "gbr", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_RGB}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
367  { "bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT709}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
368  { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_UNSPECIFIED}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
369  { "fcc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_FCC}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
370  { "bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
371  { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE170M}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
372  { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE240M}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
373  { "ycgco", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_YCGCO}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
374  { "bt2020nc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
375  { "bt2020c", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_CL}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
376  { "smpte2085", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE2085}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
377  { "chroma-derived-nc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_CHROMA_DERIVED_NCL},INT_MIN, INT_MAX, V, .unit = "colorspace"},
378  { "chroma-derived-c", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_CHROMA_DERIVED_CL}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
379  { "ictcp", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_ICTCP}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
380  { "range", "select color range", OFFSET(color_range), AV_OPT_TYPE_INT, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, AVCOL_RANGE_NB-1, V, .unit = "range"},
381  { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, 0, V, .unit = "range"},
382  { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, 0, V, .unit = "range"},
383  { "limited", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, V, .unit = "range"},
384  { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, V, .unit = "range"},
385  { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, V, .unit = "range"},
386  { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, V, .unit = "range"},
387  { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, V, .unit = "range"},
388  { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, V, .unit = "range"},
389  { NULL },
390 };
391 
393 
394 static const AVOption abuffer_options[] = {
395  { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
396  { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
397  { "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 },
398  { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
399  { "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
400  { NULL },
401 };
402 
403 AVFILTER_DEFINE_CLASS(abuffer);
404 
406 {
407  BufferSourceContext *s = ctx->priv;
408  char buf[128];
409  int ret = 0;
410 
411  if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
412  av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
413  return AVERROR(EINVAL);
414  }
415 
416  if (s->channel_layout_str || s->ch_layout.nb_channels) {
417  int n;
418 
419  if (!s->ch_layout.nb_channels) {
420  ret = av_channel_layout_from_string(&s->ch_layout, s->channel_layout_str);
421  if (ret < 0) {
422 #if FF_API_OLD_CHANNEL_LAYOUT
423  uint64_t mask;
425  mask = av_get_channel_layout(s->channel_layout_str);
426  if (!mask) {
427 #endif
428  av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
429  s->channel_layout_str);
430  return AVERROR(EINVAL);
431 #if FF_API_OLD_CHANNEL_LAYOUT
432  }
434  av_log(ctx, AV_LOG_WARNING, "Channel layout '%s' uses a deprecated syntax.\n",
435  s->channel_layout_str);
436  av_channel_layout_from_mask(&s->ch_layout, mask);
437 #endif
438  }
439  }
440 
441  n = s->ch_layout.nb_channels;
442  av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
443  if (s->channels) {
444  if (n != s->channels) {
446  "Mismatching channel count %d and layout '%s' "
447  "(%d channels)\n",
448  s->channels, buf, n);
449  return AVERROR(EINVAL);
450  }
451  }
452  s->channels = n;
453  } else if (!s->channels) {
454  av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
455  "channel layout specified\n");
456  return AVERROR(EINVAL);
457  } else {
458  s->ch_layout = FF_COUNT2LAYOUT(s->channels);
459  av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
460  }
461 
462  if (!s->time_base.num)
463  s->time_base = (AVRational){1, s->sample_rate};
464 
466  "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
467  s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt),
468  s->sample_rate, buf);
469 
470  return ret;
471 }
472 
474 {
475  BufferSourceContext *s = ctx->priv;
476  av_buffer_unref(&s->hw_frames_ctx);
477  av_channel_layout_uninit(&s->ch_layout);
478 }
479 
481 {
482  BufferSourceContext *c = ctx->priv;
485  AVFilterFormats *samplerates = NULL;
486  AVFilterFormats *color_spaces = NULL;
487  AVFilterFormats *color_ranges = NULL;
488  int ret;
489 
490  switch (ctx->outputs[0]->type) {
491  case AVMEDIA_TYPE_VIDEO: {
492  enum AVPixelFormat swfmt = c->pix_fmt;
494  if (!c->hw_frames_ctx) {
495  av_log(ctx, AV_LOG_ERROR, "Setting BufferSourceContext.pix_fmt "
496  "to a HW format requires hw_frames_ctx to be non-NULL!\n");
497  return AVERROR(EINVAL);
498  }
499  swfmt = ((AVHWFramesContext *) c->hw_frames_ctx->data)->sw_format;
500  }
501  if ((ret = ff_add_format (&formats, c->pix_fmt)) < 0 ||
502  (ret = ff_set_common_formats (ctx , formats )) < 0)
503  return ret;
504  /* force specific colorspace/range downstream only for ordinary YUV */
505  if (ff_fmt_is_regular_yuv(swfmt)) {
506  if ((ret = ff_add_format(&color_spaces, c->color_space)) < 0 ||
507  (ret = ff_set_common_color_spaces(ctx, color_spaces)) < 0)
508  return ret;
509  if ((ret = ff_add_format(&color_ranges, c->color_range)) < 0)
510  return ret;
511  if (c->color_range == AVCOL_RANGE_UNSPECIFIED) {
512  /* allow implicitly promoting unspecified to mpeg */
513  if ((ret = ff_add_format(&color_ranges, AVCOL_RANGE_MPEG)) < 0)
514  return ret;
515  }
516  if ((ret = ff_set_common_color_ranges(ctx, color_ranges)) < 0)
517  return ret;
518  }
519  break;
520  }
521  case AVMEDIA_TYPE_AUDIO:
522  if ((ret = ff_add_format (&formats , c->sample_fmt )) < 0 ||
523  (ret = ff_set_common_formats (ctx , formats )) < 0 ||
524  (ret = ff_add_format (&samplerates, c->sample_rate)) < 0 ||
525  (ret = ff_set_common_samplerates (ctx , samplerates )) < 0)
526  return ret;
527 
528  if ((ret = ff_add_channel_layout(&channel_layouts, &c->ch_layout)) < 0)
529  return ret;
531  return ret;
532  break;
533  default:
534  return AVERROR(EINVAL);
535  }
536 
537  return 0;
538 }
539 
541 {
542  BufferSourceContext *c = link->src->priv;
543 
544  switch (link->type) {
545  case AVMEDIA_TYPE_VIDEO:
546  link->w = c->w;
547  link->h = c->h;
548  link->sample_aspect_ratio = c->pixel_aspect;
549 
550  if (c->hw_frames_ctx) {
551  link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
552  if (!link->hw_frames_ctx)
553  return AVERROR(ENOMEM);
554  }
555  break;
556  case AVMEDIA_TYPE_AUDIO:
557  if (!c->ch_layout.nb_channels) {
558  int ret = av_channel_layout_copy(&c->ch_layout, &link->ch_layout);
559  if (ret < 0)
560  return ret;
561  }
562  break;
563  default:
564  return AVERROR(EINVAL);
565  }
566 
567  link->time_base = c->time_base;
568  link->frame_rate = c->frame_rate;
569  return 0;
570 }
571 
573 {
574  AVFilterLink *outlink = ctx->outputs[0];
575  BufferSourceContext *c = ctx->priv;
576 
577  if (!c->eof && ff_outlink_get_status(outlink)) {
578  c->eof = 1;
579  return 0;
580  }
581 
582  if (c->eof) {
583  ff_outlink_set_status(outlink, AVERROR_EOF, c->last_pts);
584  return 0;
585  }
586  c->nb_failed_requests++;
587  return FFERROR_NOT_READY;
588 }
589 
591  {
592  .name = "default",
593  .type = AVMEDIA_TYPE_VIDEO,
594  .config_props = config_props,
595  },
596 };
597 
599  .name = "buffer",
600  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
601  .priv_size = sizeof(BufferSourceContext),
602  .activate = activate,
603  .init = init_video,
604  .uninit = uninit,
605 
606  .inputs = NULL,
609  .priv_class = &buffer_class,
610 };
611 
613  {
614  .name = "default",
615  .type = AVMEDIA_TYPE_AUDIO,
616  .config_props = config_props,
617  },
618 };
619 
621  .name = "abuffer",
622  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
623  .priv_size = sizeof(BufferSourceContext),
624  .activate = activate,
625  .init = init_audio,
626  .uninit = uninit,
627 
628  .inputs = NULL,
631  .priv_class = &abuffer_class,
632 };
formats
formats
Definition: signature.h:48
AVBufferSrcParameters::color_space
enum AVColorSpace color_space
Video only, the YUV colorspace and range.
Definition: buffersrc.h:130
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
AVFrame::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:656
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
AVERROR
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
opt.h
AV_OPT_TYPE_SAMPLE_FMT
@ AV_OPT_TYPE_SAMPLE_FMT
Definition: opt.h:237
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(buffer)
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1007
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:807
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2968
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
A
#define A
Definition: buffersrc.c:353
AVFrame::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:667
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:452
AVFrame::width
int width
Definition: frame.h:412
w
uint8_t w
Definition: llviddspenc.c:38
AVCOL_RANGE_JPEG
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:687
AVOption
AVOption.
Definition: opt.h:251
AVCOL_SPC_NB
@ AVCOL_SPC_NB
Not part of ABI.
Definition: pixfmt.h:630
av_buffersrc_add_frame
int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
Add a frame to the buffer source.
Definition: buffersrc.c:184
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
OFFSET
#define OFFSET(x)
Definition: buffersrc.c:352
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
AVCOL_SPC_RGB
@ AVCOL_SPC_RGB
order of coefficients is actually GBR, also IEC 61966-2-1 (sRGB), YZX and ST 428-1
Definition: pixfmt.h:614
float.h
CHECK_AUDIO_PARAM_CHANGE
#define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, layout, format, pts)
Definition: buffersrc.c:95
ff_filter_graph_run_once
int ff_filter_graph_run_once(AVFilterGraph *graph)
Run one round of processing on a filter graph.
Definition: avfiltergraph.c:1502
AVChannelLayout::order
enum AVChannelOrder order
Channel order used in this layout.
Definition: channel_layout.h:318
av_buffer_ref
AVBufferRef * av_buffer_ref(const AVBufferRef *buf)
Create a new reference to an AVBuffer.
Definition: buffer.c:103
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
BufferSourceContext::channels
int channels
Definition: buffersrc.c:63
AVChannelLayout::mask
uint64_t mask
This member must be used for AV_CHANNEL_ORDER_NATIVE, and may be used for AV_CHANNEL_ORDER_AMBISONIC ...
Definition: channel_layout.h:345
AV_OPT_TYPE_RATIONAL
@ AV_OPT_TYPE_RATIONAL
Definition: opt.h:230
av_get_channel_layout_nb_channels
int av_get_channel_layout_nb_channels(uint64_t channel_layout)
Return the number of channels in the channel layout.
Definition: channel_layout.c:330
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:323
abuffer_options
static const AVOption abuffer_options[]
Definition: buffersrc.c:394
video.h
AVFrame::buf
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:590
AVBufferSrcParameters::height
int height
Definition: buffersrc.h:87
ff_fmt_is_regular_yuv
int ff_fmt_is_regular_yuv(enum AVPixelFormat fmt)
Returns true if a pixel format is "regular YUV", which includes all pixel formats that are affected b...
Definition: avfiltergraph.c:605
AVCOL_SPC_BT2020_CL
@ AVCOL_SPC_BT2020_CL
ITU-R BT2020 constant luminance system.
Definition: pixfmt.h:625
sample_rate
sample_rate
Definition: ffmpeg_filter.c:424
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
AV_FRAME_FLAG_TOP_FIELD_FIRST
#define AV_FRAME_FLAG_TOP_FIELD_FIRST
A flag to mark frames where the top field is displayed first if the content is interlaced.
Definition: frame.h:641
formats.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: buffersrc.c:473
AVCOL_SPC_BT470BG
@ AVCOL_SPC_BT470BG
also ITU-R BT601-6 625 / ITU-R BT1358 625 / ITU-R BT1700 625 PAL & SECAM / IEC 61966-2-4 xvYCC601
Definition: pixfmt.h:619
av_color_space_name
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:3344
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:424
AVBufferSrcParameters::sample_aspect_ratio
AVRational sample_aspect_ratio
Video only, the sample (pixel) aspect ratio.
Definition: buffersrc.h:92
AV_PIX_FMT_FLAG_HWACCEL
#define AV_PIX_FMT_FLAG_HWACCEL
Pixel format is an HW accelerated format.
Definition: pixdesc.h:128
BufferSourceContext::frame_rate
AVRational frame_rate
frame_rate to set in the output link
Definition: buffersrc.c:48
samplefmt.h
AVCOL_RANGE_NB
@ AVCOL_RANGE_NB
Not part of ABI.
Definition: pixfmt.h:688
ff_vsrc_buffer
const AVFilter ff_vsrc_buffer
Definition: buffersrc.c:598
AVFrame::ch_layout
AVChannelLayout ch_layout
Channel layout of the audio data.
Definition: frame.h:802
pts
static int64_t pts
Definition: transcode_aac.c:643
AVFrame::channels
attribute_deprecated int channels
number of audio channels, only used for audio.
Definition: frame.h:731
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:88
BufferSourceContext::sample_rate
int sample_rate
Definition: buffersrc.c:61
AVBufferSrcParameters::ch_layout
AVChannelLayout ch_layout
Audio only, the audio channel layout.
Definition: buffersrc.h:125
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
BufferSourceContext::prev_w
int prev_w
Definition: buffersrc.c:52
av_cold
#define av_cold
Definition: attributes.h:90
AVFrame::channel_layout
attribute_deprecated uint64_t channel_layout
Channel layout of the audio data.
Definition: frame.h:575
ff_set_common_formats
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:867
AV_BUFFERSRC_FLAG_KEEP_REF
@ AV_BUFFERSRC_FLAG_KEEP_REF
Keep a reference to the frame.
Definition: buffersrc.h:53
AV_FRAME_FLAG_KEY
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
Definition: frame.h:628
mask
static const uint16_t mask[17]
Definition: lzw.c:38
av_channel_layout_describe
int av_channel_layout_describe(const AVChannelLayout *channel_layout, char *buf, size_t buf_size)
Get a human-readable string describing the channel layout properties.
Definition: channel_layout.c:847
ff_outlink_set_status
static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)
Set the status field of a link from the source filter.
Definition: filters.h:189
s
#define s(width, name)
Definition: cbs_vp9.c:198
BufferSourceContext::h
int h
Definition: buffersrc.c:52
AVCOL_SPC_SMPTE170M
@ AVCOL_SPC_SMPTE170M
also ITU-R BT601-6 525 / ITU-R BT1358 525 / ITU-R BT1700 NTSC / functionally identical to above
Definition: pixfmt.h:620
pix_fmt
static enum AVPixelFormat pix_fmt
Definition: demux_decode.c:41
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_CHANNEL_ORDER_UNSPEC
@ AV_CHANNEL_ORDER_UNSPEC
Only the channel count is specified, without any further information about the channel order.
Definition: channel_layout.h:112
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
av_channel_layout_from_mask
int av_channel_layout_from_mask(AVChannelLayout *channel_layout, uint64_t mask)
Initialize a native channel layout from a bitmask indicating which channels are present.
Definition: channel_layout.c:421
push_frame
static int push_frame(AVFilterGraph *graph)
Definition: buffersrc.c:189
BufferSourceContext
Definition: buffersrc.c:45
avfilter_vsrc_buffer_outputs
static const AVFilterPad avfilter_vsrc_buffer_outputs[]
Definition: buffersrc.c:590
BufferSourceContext::ch_layout
AVChannelLayout ch_layout
Definition: buffersrc.c:65
filters.h
AV_BUFFERSRC_FLAG_PUSH
@ AV_BUFFERSRC_FLAG_PUSH
Immediately push the frame to the output.
Definition: buffersrc.h:46
ctx
AVFormatContext * ctx
Definition: movenc.c:48
channels
channels
Definition: aptx.h:31
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:609
av_get_sample_fmt_name
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:51
color_range
color_range
Definition: vf_selectivecolor.c:43
buffer_options
static const AVOption buffer_options[]
Definition: buffersrc.c:356
link
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 link
Definition: filter_design.txt:23
AVCOL_SPC_CHROMA_DERIVED_CL
@ AVCOL_SPC_CHROMA_DERIVED_CL
Chromaticity-derived constant luminance system.
Definition: pixfmt.h:628
frame
static AVFrame * frame
Definition: demux_decode.c:54
BufferSourceContext::eof
int eof
Definition: buffersrc.c:67
av_color_range_name
const char * av_color_range_name(enum AVColorRange range)
Definition: pixdesc.c:3284
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
av_buffer_unref
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:139
AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT
@ AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT
Do not check for format changes.
Definition: buffersrc.h:41
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
BufferSourceContext::last_pts
int64_t last_pts
Definition: buffersrc.c:68
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
ff_add_format
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:504
BufferSourceContext::nb_failed_requests
unsigned nb_failed_requests
Definition: buffersrc.c:49
AVCOL_SPC_YCGCO
@ AVCOL_SPC_YCGCO
used by Dirac / VC-2 and H.264 FRext, see ITU-T SG16
Definition: pixfmt.h:622
AVFilterGraph
Definition: avfilter.h:830
av_get_channel_layout
uint64_t av_get_channel_layout(const char *name)
Return a channel layout id that matches name, or 0 if no match is found.
Definition: channel_layout.c:249
inputs
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
Definition: filter_design.txt:243
ff_add_channel_layout
int ff_add_channel_layout(AVFilterChannelLayouts **l, const AVChannelLayout *channel_layout)
Definition: formats.c:521
AVCOL_RANGE_UNSPECIFIED
@ AVCOL_RANGE_UNSPECIFIED
Definition: pixfmt.h:653
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
BufferSourceContext::pixel_aspect
AVRational pixel_aspect
Definition: buffersrc.c:56
AVBufferSrcParameters::frame_rate
AVRational frame_rate
Video only, the frame rate of the input video.
Definition: buffersrc.h:100
attribute_align_arg
#define attribute_align_arg
Definition: internal.h:50
av_buffersrc_close
int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
Close the buffer source after EOF.
Definition: buffersrc.c:312
V
#define V
Definition: buffersrc.c:354
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:365
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:106
copy
static void copy(const float *p1, float *p2, const int length)
Definition: vf_vaguedenoiser.c:185
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:313
av_buffersrc_parameters_alloc
AVBufferSrcParameters * av_buffersrc_parameters_alloc(void)
Allocate a new AVBufferSrcParameters instance.
Definition: buffersrc.c:105
AVFrame::sample_rate
int sample_rate
Sample rate of the audio data.
Definition: frame.h:567
BufferSourceContext::hw_frames_ctx
AVBufferRef * hw_frames_ctx
Definition: buffersrc.c:58
config_props
static int config_props(AVFilterLink *link)
Definition: buffersrc.c:540
AVBufferSrcParameters::hw_frames_ctx
AVBufferRef * hw_frames_ctx
Video with a hwaccel pixel format only.
Definition: buffersrc.h:106
AVBufferSrcParameters::sample_rate
int sample_rate
Audio only, the audio sampling rate in samples per second.
Definition: buffersrc.h:111
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:56
AVFrame::time_base
AVRational time_base
Time base for the timestamps in this frame.
Definition: frame.h:467
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:427
frame.h
AVBufferSrcParameters::time_base
AVRational time_base
The timebase to be used for the timestamps on the input frames.
Definition: buffersrc.h:82
BufferSourceContext::link_delta
int link_delta
Definition: buffersrc.c:69
init_audio
static av_cold int init_audio(AVFilterContext *ctx)
Definition: buffersrc.c:405
AV_CHANNEL_ORDER_NATIVE
@ AV_CHANNEL_ORDER_NATIVE
The native channel order, i.e.
Definition: channel_layout.h:118
BufferSourceContext::prev_color_space
enum AVColorSpace color_space prev_color_space
Definition: buffersrc.c:54
AVCOL_SPC_CHROMA_DERIVED_NCL
@ AVCOL_SPC_CHROMA_DERIVED_NCL
Chromaticity-derived non-constant luminance system.
Definition: pixfmt.h:627
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: buffersrc.c:480
internal.h
AVCOL_SPC_SMPTE240M
@ AVCOL_SPC_SMPTE240M
derived from 170M primaries and D65 white point, 170M is derived from BT470 System M's primaries
Definition: pixfmt.h:621
ff_set_common_color_ranges
int ff_set_common_color_ranges(AVFilterContext *ctx, AVFilterFormats *color_ranges)
Definition: formats.c:844
av_channel_layout_from_string
int av_channel_layout_from_string(AVChannelLayout *channel_layout, const char *str)
Initialize a channel layout from a given string description.
Definition: channel_layout.c:434
av_buffersrc_parameters_set
int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
Initialize the buffersrc or abuffersrc filter with the provided parameters.
Definition: buffersrc.c:118
BufferSourceContext::w
int w
Definition: buffersrc.c:52
AVBufferSrcParameters::width
int width
Video only, the display dimensions of the input frames.
Definition: buffersrc.h:87
AVCOL_SPC_BT2020_NCL
@ AVCOL_SPC_BT2020_NCL
ITU-R BT2020 non-constant luminance system.
Definition: pixfmt.h:624
ff_avfilter_link_set_in_status
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:243
internal.h
av_buffersrc_add_frame_flags
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:203
AVColorSpace
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:613
common.h
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
init_video
static av_cold int init_video(AVFilterContext *ctx)
Definition: buffersrc.c:321
av_frame_move_ref
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:649
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:254
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
AVCOL_SPC_UNSPECIFIED
@ AVCOL_SPC_UNSPECIFIED
Definition: pixfmt.h:616
activate
static int activate(AVFilterContext *ctx)
Definition: buffersrc.c:572
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:636
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:670
AVFilter
Filter definition.
Definition: avfilter.h:166
AVHWFramesContext
This struct describes a set or pool of "hardware" frames (i.e.
Definition: hwcontext.h:125
ret
ret
Definition: filter_design.txt:187
ff_set_common_color_spaces
int ff_set_common_color_spaces(AVFilterContext *ctx, AVFilterFormats *color_spaces)
Definition: formats.c:826
FF_COUNT2LAYOUT
#define FF_COUNT2LAYOUT(c)
Encode a channel count as a channel layout.
Definition: formats.h:102
AVFrame::sample_aspect_ratio
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:447
CHECK_VIDEO_PARAM_CHANGE
#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, csp, range, pts)
Definition: buffersrc.c:72
AVFrame::hw_frames_ctx
AVBufferRef * hw_frames_ctx
For hwaccel-format frames, this should be a reference to the AVHWFramesContext describing the frame.
Definition: frame.h:752
AVBufferSrcParameters::color_range
enum AVColorRange color_range
Definition: buffersrc.h:131
AVFrame::height
int height
Definition: frame.h:412
channel_layout.h
AVBufferSrcParameters
This structure contains the parameters describing the frames that will be passed to this filter.
Definition: buffersrc.h:73
AVBufferSrcParameters::format
int format
video: the pixel format, value corresponds to enum AVPixelFormat audio: the sample format,...
Definition: buffersrc.h:78
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AVCOL_SPC_FCC
@ AVCOL_SPC_FCC
FCC Title 47 Code of Federal Regulations 73.682 (a)(20)
Definition: pixfmt.h:618
BufferSourceContext::prev_pix_fmt
enum AVPixelFormat pix_fmt prev_pix_fmt
Definition: buffersrc.c:53
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
av_channel_layout_uninit
void av_channel_layout_uninit(AVChannelLayout *channel_layout)
Free any allocated data in the channel layout and reset the channel count to 0.
Definition: channel_layout.c:662
AV_OPT_TYPE_PIXEL_FMT
@ AV_OPT_TYPE_PIXEL_FMT
Definition: opt.h:236
ff_outlink_get_status
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
Definition: avfilter.c:1589
AVFilterContext
An instance of a filter.
Definition: avfilter.h:409
av_channel_layout_copy
int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src)
Make a copy of a channel layout.
Definition: channel_layout.c:669
FF_DISABLE_DEPRECATION_WARNINGS
#define FF_DISABLE_DEPRECATION_WARNINGS
Definition: internal.h:72
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_buffersrc_get_nb_failed_requests
unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
Get the number of failed requests.
Definition: buffersrc.c:347
audio.h
AVBufferRef
A reference to a data buffer.
Definition: buffer.h:82
BufferSourceContext::prev_h
int prev_h
Definition: buffersrc.c:52
BufferSourceContext::channel_layout_str
char * channel_layout_str
Definition: buffersrc.c:64
channel_layouts
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:111
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:183
AVCOL_SPC_SMPTE2085
@ AVCOL_SPC_SMPTE2085
SMPTE 2085, Y'D'zD'x.
Definition: pixfmt.h:626
BufferSourceContext::prev_color_range
enum AVColorRange color_range prev_color_range
Definition: buffersrc.c:55
BufferSourceContext::time_base
AVRational time_base
time_base to set in the output link
Definition: buffersrc.c:47
av_buffersrc_write_frame
int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
Add a frame to the buffer source.
Definition: buffersrc.c:178
imgutils.h
timestamp.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
hwcontext.h
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
ff_asrc_abuffer
const AVFilter ff_asrc_abuffer
Definition: buffersrc.c:620
ff_set_common_samplerates
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:808
h
h
Definition: vp9dsp_template.c:2038
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
AVCOL_SPC_BT709
@ AVCOL_SPC_BT709
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / derived in SMPTE RP 177 Annex B
Definition: pixfmt.h:615
AVColorRange
AVColorRange
Visual content value range.
Definition: pixfmt.h:652
AVCOL_SPC_ICTCP
@ AVCOL_SPC_ICTCP
ITU-R BT.2100-0, ICtCp.
Definition: pixfmt.h:629
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
AVChannelLayout::u
union AVChannelLayout::@345 u
Details about which channels are present in this layout.
buffersrc.h
BufferSourceContext::sample_fmt
enum AVSampleFormat sample_fmt
Definition: buffersrc.c:62
av_get_pix_fmt_name
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:2888
avfilter_asrc_abuffer_outputs
static const AVFilterPad avfilter_asrc_abuffer_outputs[]
Definition: buffersrc.c:612
ff_set_common_channel_layouts
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts)
Helpers for query_formats() which set all free audio links to the same list of channel layouts/sample...
Definition: formats.c:790
BufferSourceContext::prev_delta
int prev_delta
Definition: buffersrc.c:69