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 
28 #include "libavutil/channel_layout.h"
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
49  unsigned nb_failed_requests;
50 
51  /* video only */
52  int w, h, prev_w, prev_h;
53  enum AVPixelFormat pix_fmt, prev_pix_fmt;
54  enum AVColorSpace color_space, prev_color_space;
55  enum AVColorRange color_range, prev_color_range;
56  AVRational pixel_aspect;
57 
58  AVBufferRef *hw_frames_ctx;
59 
60  /* audio only */
61  int sample_rate;
62  enum AVSampleFormat sample_fmt;
63  int channels;
64  char *channel_layout_str;
65  AVChannelLayout ch_layout;
66 
67  int eof;
68  int64_t last_pts;
69  int link_delta, prev_delta;
70 } BufferSourceContext;
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 
105 AVBufferSrcParameters *av_buffersrc_parameters_alloc(void)
106 {
107  AVBufferSrcParameters *par = av_mallocz(sizeof(*par));
108  if (!par)
109  return NULL;
110 
111  par->format = -1;
112  par->color_range = AVCOL_RANGE_UNSPECIFIED;
113  par->color_space = AVCOL_SPC_UNSPECIFIED;
114 
115  return par;
116 }
117 
118 int av_buffersrc_parameters_set(AVFilterContext *ctx, AVBufferSrcParameters *param)
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 (param->ch_layout.nb_channels) {
156  int ret = av_channel_layout_copy(&s->ch_layout, &param->ch_layout);
157  if (ret < 0)
158  return ret;
159  }
160  break;
161  default:
162  return AVERROR_BUG;
163  }
164 
165  return 0;
166 }
167 
168 int attribute_align_arg av_buffersrc_write_frame(AVFilterContext *ctx, const AVFrame *frame)
169 {
170  return av_buffersrc_add_frame_flags(ctx, (AVFrame *)frame,
171  AV_BUFFERSRC_FLAG_KEEP_REF);
172 }
173 
174 int attribute_align_arg av_buffersrc_add_frame(AVFilterContext *ctx, AVFrame *frame)
175 {
176  return av_buffersrc_add_frame_flags(ctx, frame, 0);
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 
193 int attribute_align_arg av_buffersrc_add_frame_flags(AVFilterContext *ctx, AVFrame *frame, int flags)
194 {
195  BufferSourceContext *s = ctx->priv;
196  AVFrame *copy;
197  int refcounted, ret;
198 
199  s->nb_failed_requests = 0;
200 
201  if (!frame)
202  return av_buffersrc_close(ctx, s->last_pts, flags);
203  if (s->eof)
204  return AVERROR_EOF;
205 
206  s->last_pts = frame->pts + frame->duration;
207 
208  refcounted = !!frame->buf[0];
209 
210  if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) {
211 
212  switch (ctx->outputs[0]->type) {
213  case AVMEDIA_TYPE_VIDEO:
214  CHECK_VIDEO_PARAM_CHANGE(ctx, s, frame->width, frame->height,
215  frame->format, frame->colorspace,
216  frame->color_range, frame->pts);
217  break;
218  case AVMEDIA_TYPE_AUDIO:
219  /* For layouts unknown on input but known on link after negotiation. */
220  if (frame->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC) {
221  ret = av_channel_layout_copy(&frame->ch_layout, &s->ch_layout);
222  if (ret < 0)
223  return ret;
224  }
225  CHECK_AUDIO_PARAM_CHANGE(ctx, s, frame->sample_rate, frame->ch_layout,
226  frame->format, frame->pts);
227  break;
228  default:
229  return AVERROR(EINVAL);
230  }
231 
232  }
233 
234  if (refcounted && !(flags & AV_BUFFERSRC_FLAG_KEEP_REF)) {
235  if (!(copy = av_frame_alloc()))
236  return AVERROR(ENOMEM);
237  av_frame_move_ref(copy, frame);
238  } else {
239  copy = av_frame_clone(frame);
240  if (!copy)
241  return AVERROR(ENOMEM);
242  }
243 
244 #if FF_API_INTERLACED_FRAME
245 FF_DISABLE_DEPRECATION_WARNINGS
246  if (copy->interlaced_frame)
247  copy->flags |= AV_FRAME_FLAG_INTERLACED;
248  if (copy->top_field_first)
249  copy->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
250 FF_ENABLE_DEPRECATION_WARNINGS
251 #endif
252 
253 #if FF_API_FRAME_KEY
254 FF_DISABLE_DEPRECATION_WARNINGS
255  if (copy->key_frame)
256  copy->flags |= AV_FRAME_FLAG_KEY;
257 FF_ENABLE_DEPRECATION_WARNINGS
258 #endif
259 
260  if (copy->colorspace == AVCOL_SPC_UNSPECIFIED)
261  copy->colorspace = ctx->outputs[0]->colorspace;
262  if (copy->color_range == AVCOL_RANGE_UNSPECIFIED)
263  copy->color_range = ctx->outputs[0]->color_range;
264 
265  ret = ff_filter_frame(ctx->outputs[0], copy);
266  if (ret < 0)
267  return ret;
268 
269  if ((flags & AV_BUFFERSRC_FLAG_PUSH)) {
270  ret = push_frame(ctx->graph);
271  if (ret < 0)
272  return ret;
273  }
274 
275  return 0;
276 }
277 
278 int av_buffersrc_close(AVFilterContext *ctx, int64_t pts, unsigned flags)
279 {
280  BufferSourceContext *s = ctx->priv;
281 
282  s->eof = 1;
283  ff_avfilter_link_set_in_status(ctx->outputs[0], AVERROR_EOF, pts);
284  return (flags & AV_BUFFERSRC_FLAG_PUSH) ? push_frame(ctx->graph) : 0;
285 }
286 
287 static av_cold int init_video(AVFilterContext *ctx)
288 {
289  BufferSourceContext *c = ctx->priv;
290 
291  if (c->pix_fmt == AV_PIX_FMT_NONE) {
292  av_log(ctx, AV_LOG_ERROR, "Unspecified pixel format\n");
293  return AVERROR(EINVAL);
294  }
295  if (c->w <= 0 || c->h <= 0) {
296  av_log(ctx, AV_LOG_ERROR, "Invalid size %dx%d\n", c->w, c->h);
297  return AVERROR(EINVAL);
298  }
299  if (av_q2d(c->time_base) <= 0) {
300  av_log(ctx, AV_LOG_ERROR, "Invalid time base %d/%d\n", c->time_base.num, c->time_base.den);
301  return AVERROR(EINVAL);
302  }
303 
304  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",
305  c->w, c->h, av_get_pix_fmt_name(c->pix_fmt),
306  c->time_base.num, c->time_base.den, c->frame_rate.num, c->frame_rate.den,
307  c->pixel_aspect.num, c->pixel_aspect.den,
308  av_color_space_name(c->color_space), av_color_range_name(c->color_range));
309 
310  return 0;
311 }
312 
313 unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src)
314 {
315  return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests;
316 }
317 
318 #define OFFSET(x) offsetof(BufferSourceContext, x)
319 #define A AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_AUDIO_PARAM
320 #define V AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
321 
322 static const AVOption buffer_options[] = {
323  { "width", NULL, OFFSET(w), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
324  { "video_size", NULL, OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, .flags = V },
325  { "height", NULL, OFFSET(h), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, V },
326  { "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 },
327  { "sar", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
328  { "pixel_aspect", "sample aspect ratio", OFFSET(pixel_aspect), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
329  { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
330  { "frame_rate", NULL, OFFSET(frame_rate), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, DBL_MAX, V },
331  { "colorspace", "select colorspace", OFFSET(color_space), AV_OPT_TYPE_INT, {.i64=AVCOL_SPC_UNSPECIFIED}, 0, AVCOL_SPC_NB-1, V, .unit = "colorspace"},
332  { "gbr", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_RGB}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
333  { "bt709", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT709}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
334  { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_UNSPECIFIED}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
335  { "fcc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_FCC}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
336  { "bt470bg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT470BG}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
337  { "smpte170m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE170M}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
338  { "smpte240m", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE240M}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
339  { "ycgco", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_YCGCO}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
340  { "bt2020nc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_NCL}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
341  { "bt2020c", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_BT2020_CL}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
342  { "smpte2085", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_SMPTE2085}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
343  { "chroma-derived-nc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_CHROMA_DERIVED_NCL},INT_MIN, INT_MAX, V, .unit = "colorspace"},
344  { "chroma-derived-c", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_CHROMA_DERIVED_CL}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
345  { "ictcp", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_SPC_ICTCP}, INT_MIN, INT_MAX, V, .unit = "colorspace"},
346  { "range", "select color range", OFFSET(color_range), AV_OPT_TYPE_INT, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, AVCOL_RANGE_NB-1, V, .unit = "range"},
347  { "unspecified", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, 0, V, .unit = "range"},
348  { "unknown", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_UNSPECIFIED}, 0, 0, V, .unit = "range"},
349  { "limited", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, V, .unit = "range"},
350  { "tv", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, V, .unit = "range"},
351  { "mpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_MPEG}, 0, 0, V, .unit = "range"},
352  { "full", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, V, .unit = "range"},
353  { "pc", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, V, .unit = "range"},
354  { "jpeg", NULL, 0, AV_OPT_TYPE_CONST, {.i64=AVCOL_RANGE_JPEG}, 0, 0, V, .unit = "range"},
355  { NULL },
356 };
357 
358 AVFILTER_DEFINE_CLASS(buffer);
359 
360 static const AVOption abuffer_options[] = {
361  { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { .dbl = 0 }, 0, INT_MAX, A },
362  { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
363  { "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 },
364  { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A },
365  { "channels", NULL, OFFSET(channels), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, A },
366  { NULL },
367 };
368 
369 AVFILTER_DEFINE_CLASS(abuffer);
370 
371 static av_cold int init_audio(AVFilterContext *ctx)
372 {
373  BufferSourceContext *s = ctx->priv;
374  char buf[128];
375  int ret = 0;
376 
377  if (s->sample_fmt == AV_SAMPLE_FMT_NONE) {
378  av_log(ctx, AV_LOG_ERROR, "Sample format was not set or was invalid\n");
379  return AVERROR(EINVAL);
380  }
381 
382  if (s->channel_layout_str || s->ch_layout.nb_channels) {
383  int n;
384 
385  if (!s->ch_layout.nb_channels) {
386  ret = av_channel_layout_from_string(&s->ch_layout, s->channel_layout_str);
387  if (ret < 0) {
388  av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n",
389  s->channel_layout_str);
390  return AVERROR(EINVAL);
391  }
392  }
393 
394  n = s->ch_layout.nb_channels;
395  av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
396  if (s->channels) {
397  if (n != s->channels) {
398  av_log(ctx, AV_LOG_ERROR,
399  "Mismatching channel count %d and layout '%s' "
400  "(%d channels)\n",
401  s->channels, buf, n);
402  return AVERROR(EINVAL);
403  }
404  }
405  s->channels = n;
406  } else if (!s->channels) {
407  av_log(ctx, AV_LOG_ERROR, "Neither number of channels nor "
408  "channel layout specified\n");
409  return AVERROR(EINVAL);
410  } else {
411  s->ch_layout = FF_COUNT2LAYOUT(s->channels);
412  av_channel_layout_describe(&s->ch_layout, buf, sizeof(buf));
413  }
414 
415  if (!s->time_base.num)
416  s->time_base = (AVRational){1, s->sample_rate};
417 
418  av_log(ctx, AV_LOG_VERBOSE,
419  "tb:%d/%d samplefmt:%s samplerate:%d chlayout:%s\n",
420  s->time_base.num, s->time_base.den, av_get_sample_fmt_name(s->sample_fmt),
421  s->sample_rate, buf);
422 
423  return ret;
424 }
425 
426 static av_cold void uninit(AVFilterContext *ctx)
427 {
428  BufferSourceContext *s = ctx->priv;
429  av_buffer_unref(&s->hw_frames_ctx);
430  av_channel_layout_uninit(&s->ch_layout);
431 }
432 
433 static int query_formats(AVFilterContext *ctx)
434 {
435  BufferSourceContext *c = ctx->priv;
436  AVFilterChannelLayouts *channel_layouts = NULL;
437  AVFilterFormats *formats = NULL;
438  AVFilterFormats *samplerates = NULL;
439  AVFilterFormats *color_spaces = NULL;
440  AVFilterFormats *color_ranges = NULL;
441  int ret;
442 
443  switch (ctx->outputs[0]->type) {
444  case AVMEDIA_TYPE_VIDEO: {
445  enum AVPixelFormat swfmt = c->pix_fmt;
446  if (av_pix_fmt_desc_get(swfmt)->flags & AV_PIX_FMT_FLAG_HWACCEL) {
447  if (!c->hw_frames_ctx) {
448  av_log(ctx, AV_LOG_ERROR, "Setting BufferSourceContext.pix_fmt "
449  "to a HW format requires hw_frames_ctx to be non-NULL!\n");
450  return AVERROR(EINVAL);
451  }
452  swfmt = ((AVHWFramesContext *) c->hw_frames_ctx->data)->sw_format;
453  }
454  if ((ret = ff_add_format (&formats, c->pix_fmt)) < 0 ||
455  (ret = ff_set_common_formats (ctx , formats )) < 0)
456  return ret;
457  /* force specific colorspace/range downstream only for ordinary YUV */
458  if (ff_fmt_is_regular_yuv(swfmt)) {
459  if ((ret = ff_add_format(&color_spaces, c->color_space)) < 0 ||
460  (ret = ff_set_common_color_spaces(ctx, color_spaces)) < 0)
461  return ret;
462  if ((ret = ff_add_format(&color_ranges, c->color_range)) < 0)
463  return ret;
464  if (c->color_range == AVCOL_RANGE_UNSPECIFIED) {
465  /* allow implicitly promoting unspecified to mpeg */
466  if ((ret = ff_add_format(&color_ranges, AVCOL_RANGE_MPEG)) < 0)
467  return ret;
468  }
469  if ((ret = ff_set_common_color_ranges(ctx, color_ranges)) < 0)
470  return ret;
471  }
472  break;
473  }
474  case AVMEDIA_TYPE_AUDIO:
475  if ((ret = ff_add_format (&formats , c->sample_fmt )) < 0 ||
476  (ret = ff_set_common_formats (ctx , formats )) < 0 ||
477  (ret = ff_add_format (&samplerates, c->sample_rate)) < 0 ||
478  (ret = ff_set_common_samplerates (ctx , samplerates )) < 0)
479  return ret;
480 
481  if ((ret = ff_add_channel_layout(&channel_layouts, &c->ch_layout)) < 0)
482  return ret;
483  if ((ret = ff_set_common_channel_layouts(ctx, channel_layouts)) < 0)
484  return ret;
485  break;
486  default:
487  return AVERROR(EINVAL);
488  }
489 
490  return 0;
491 }
492 
493 static int config_props(AVFilterLink *link)
494 {
495  BufferSourceContext *c = link->src->priv;
496 
497  switch (link->type) {
498  case AVMEDIA_TYPE_VIDEO:
499  link->w = c->w;
500  link->h = c->h;
501  link->sample_aspect_ratio = c->pixel_aspect;
502 
503  if (c->hw_frames_ctx) {
504  link->hw_frames_ctx = av_buffer_ref(c->hw_frames_ctx);
505  if (!link->hw_frames_ctx)
506  return AVERROR(ENOMEM);
507  }
508  break;
509  case AVMEDIA_TYPE_AUDIO:
510  if (!c->ch_layout.nb_channels || c->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC) {
511  int ret = av_channel_layout_copy(&c->ch_layout, &link->ch_layout);
512  if (ret < 0)
513  return ret;
514  }
515  break;
516  default:
517  return AVERROR(EINVAL);
518  }
519 
520  link->time_base = c->time_base;
521  link->frame_rate = c->frame_rate;
522  return 0;
523 }
524 
525 static int activate(AVFilterContext *ctx)
526 {
527  AVFilterLink *outlink = ctx->outputs[0];
528  BufferSourceContext *c = ctx->priv;
529 
530  if (!c->eof && ff_outlink_get_status(outlink)) {
531  c->eof = 1;
532  return 0;
533  }
534 
535  if (c->eof) {
536  ff_outlink_set_status(outlink, AVERROR_EOF, c->last_pts);
537  return 0;
538  }
539  c->nb_failed_requests++;
540  return FFERROR_NOT_READY;
541 }
542 
543 static const AVFilterPad avfilter_vsrc_buffer_outputs[] = {
544  {
545  .name = "default",
546  .type = AVMEDIA_TYPE_VIDEO,
547  .config_props = config_props,
548  },
549 };
550 
551 const AVFilter ff_vsrc_buffer = {
552  .name = "buffer",
553  .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
554  .priv_size = sizeof(BufferSourceContext),
555  .activate = activate,
556  .init = init_video,
557  .uninit = uninit,
558 
559  .inputs = NULL,
560  FILTER_OUTPUTS(avfilter_vsrc_buffer_outputs),
561  FILTER_QUERY_FUNC(query_formats),
562  .priv_class = &buffer_class,
563 };
564 
565 static const AVFilterPad avfilter_asrc_abuffer_outputs[] = {
566  {
567  .name = "default",
568  .type = AVMEDIA_TYPE_AUDIO,
569  .config_props = config_props,
570  },
571 };
572 
573 const AVFilter ff_asrc_abuffer = {
574  .name = "abuffer",
575  .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."),
576  .priv_size = sizeof(BufferSourceContext),
577  .activate = activate,
578  .init = init_audio,
579  .uninit = uninit,
580 
581  .inputs = NULL,
582  FILTER_OUTPUTS(avfilter_asrc_abuffer_outputs),
583  FILTER_QUERY_FUNC(query_formats),
584  .priv_class = &abuffer_class,
585 };
formats
formats
Definition: signature.h:48
AVBufferSrcParameters::color_space
enum AVColorSpace color_space
Video only, the YUV colorspace and range.
Definition: buffersrc.h:121
FF_ENABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
Definition: internal.h:73
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
AVFrame::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:623
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:247
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:1018
AVFrame::duration
int64_t duration
Duration of the frame, in the same units as pts.
Definition: frame.h:750
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2962
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
FFERROR_NOT_READY
return FFERROR_NOT_READY
Definition: filter_design.txt:204
AV_BUFFERSRC_FLAG_PUSH
@ AV_BUFFERSRC_FLAG_PUSH
Immediately push the frame to the output.
Definition: buffersrc.h:46
A
#define A
Definition: buffersrc.c:319
AVFrame::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: frame.h:634
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:344
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:456
AVFrame::width
int width
Definition: frame.h:416
w
uint8_t w
Definition: llviddspenc.c:38
AVCOL_RANGE_JPEG
@ AVCOL_RANGE_JPEG
Full range content.
Definition: pixfmt.h:683
AVOption
AVOption.
Definition: opt.h:346
AVCOL_SPC_NB
@ AVCOL_SPC_NB
Not part of ABI.
Definition: pixfmt.h:626
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:174
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
OFFSET
#define OFFSET(x)
Definition: buffersrc.c:318
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:610
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:1420
AVChannelLayout::order
enum AVChannelOrder order
Channel order used in this layout.
Definition: channel_layout.h:308
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
AV_BUFFERSRC_FLAG_KEEP_REF
@ AV_BUFFERSRC_FLAG_KEEP_REF
Keep a reference to the frame.
Definition: buffersrc.h:53
AV_OPT_TYPE_RATIONAL
@ AV_OPT_TYPE_RATIONAL
Definition: opt.h:240
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:313
abuffer_options
static const AVOption abuffer_options[]
Definition: buffersrc.c:360
video.h
AVFrame::buf
AVBufferRef * buf[AV_NUM_DATA_POINTERS]
AVBuffer references backing the data for this frame.
Definition: frame.h:557
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:621
sample_rate
sample_rate
Definition: ffmpeg_filter.c:409
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:608
formats.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: buffersrc.c:426
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:615
av_color_space_name
const char * av_color_space_name(enum AVColorSpace space)
Definition: pixdesc.c:3338
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:422
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:684
ff_vsrc_buffer
const AVFilter ff_vsrc_buffer
Definition: buffersrc.c:551
AVFrame::ch_layout
AVChannelLayout ch_layout
Channel layout of the audio data.
Definition: frame.h:745
pts
static int64_t pts
Definition: transcode_aac.c:643
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:118
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:116
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
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_FRAME_FLAG_KEY
#define AV_FRAME_FLAG_KEY
A flag to mark frames that are keyframes.
Definition: frame.h:595
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:644
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:616
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
push_frame
static int push_frame(AVFilterGraph *graph)
Definition: buffersrc.c:179
BufferSourceContext
Definition: buffersrc.c:45
avfilter_vsrc_buffer_outputs
static const AVFilterPad avfilter_vsrc_buffer_outputs[]
Definition: buffersrc.c:543
BufferSourceContext::ch_layout
AVChannelLayout ch_layout
Definition: buffersrc.c:65
filters.h
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:563
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:322
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:624
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:3278
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
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:245
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:618
AVFilterGraph
Definition: avfilter.h:813
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:649
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:278
V
#define V
Definition: buffersrc.c:320
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:303
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:543
BufferSourceContext::hw_frames_ctx
AVBufferRef * hw_frames_ctx
Definition: buffersrc.c:58
config_props
static int config_props(AVFilterLink *link)
Definition: buffersrc.c:493
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:471
AVFrame::format
int format
format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...
Definition: frame.h:431
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:371
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:623
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: buffersrc.c:433
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:617
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:302
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:620
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:254
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:193
AVColorSpace
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:609
common.h
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:55
init_video
static av_cold int init_video(AVFilterContext *ctx)
Definition: buffersrc.c:287
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:603
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:612
activate
static int activate(AVFilterContext *ctx)
Definition: buffersrc.c:525
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:603
AVCOL_RANGE_MPEG
@ AVCOL_RANGE_MPEG
Narrow or limited range content.
Definition: pixfmt.h:666
AVFilter
Filter definition.
Definition: avfilter.h:166
AVHWFramesContext
This struct describes a set or pool of "hardware" frames (i.e.
Definition: hwcontext.h:115
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:451
CHECK_VIDEO_PARAM_CHANGE
#define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format, csp, range, pts)
Definition: buffersrc.c:72
AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT
@ AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT
Do not check for format changes.
Definition: buffersrc.h:41
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:695
AVBufferSrcParameters::color_range
enum AVColorRange color_range
Definition: buffersrc.h:122
AVFrame::height
int height
Definition: frame.h:416
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:614
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:235
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:432
AV_OPT_TYPE_PIXEL_FMT
@ AV_OPT_TYPE_PIXEL_FMT
Definition: opt.h:246
ff_outlink_get_status
int ff_outlink_get_status(AVFilterLink *link)
Get the status on an output link.
Definition: avfilter.c:1596
AVFilterContext
An instance of a filter.
Definition: avfilter.h:407
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:439
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:313
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:622
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:168
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:573
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:239
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:611
AVColorRange
AVColorRange
Visual content value range.
Definition: pixfmt.h:648
AVCOL_SPC_ICTCP
@ AVCOL_SPC_ICTCP
ITU-R BT.2100-0, ICtCp.
Definition: pixfmt.h:625
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:244
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:2882
avfilter_asrc_abuffer_outputs
static const AVFilterPad avfilter_asrc_abuffer_outputs[]
Definition: buffersrc.c:565
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
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