FFmpeg
vf_threshold.c
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1 /*
2  * Copyright (c) 2016 Paul B Mahol
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  * threshold video filter
24  */
25 
26 #include "libavutil/imgutils.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/opt.h"
29 #include "libavutil/pixdesc.h"
30 #include "avfilter.h"
31 #include "framesync.h"
32 #include "internal.h"
33 #include "video.h"
34 #include "threshold.h"
35 
36 #define OFFSET(x) offsetof(ThresholdContext, x)
37 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
38 
39 static const AVOption threshold_options[] = {
40  { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, FLAGS},
41  { NULL }
42 };
43 
44 AVFILTER_DEFINE_CLASS(threshold);
45 
47 {
48  static const enum AVPixelFormat pix_fmts[] = {
66  };
67 
68  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
69 }
70 
71 typedef struct ThreadData {
72  AVFrame *in;
76  AVFrame *out;
77 } ThreadData;
78 
79 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
80 {
81  ThresholdContext *s = ctx->priv;
82  ThreadData *td = arg;
83  AVFrame *min = td->min;
84  AVFrame *max = td->max;
86  AVFrame *in = td->in;
87  AVFrame *out = td->out;
88 
89  for (int p = 0; p < s->nb_planes; p++) {
90  const int h = s->height[p];
91  const int slice_start = (h * jobnr) / nb_jobs;
92  const int slice_end = (h * (jobnr+1)) / nb_jobs;
93 
94  if (!(s->planes & (1 << p))) {
95  av_image_copy_plane(out->data[p] + slice_start * out->linesize[p],
96  out->linesize[p],
97  in->data[p] + slice_start * in->linesize[p],
98  in->linesize[p],
99  s->width[p] * s->bpc,
100  slice_end - slice_start);
101  continue;
102  }
103  s->threshold(in->data[p] + slice_start * in->linesize[p],
104  threshold->data[p] + slice_start * threshold->linesize[p],
105  min->data[p] + slice_start * min->linesize[p],
106  max->data[p] + slice_start * max->linesize[p],
107  out->data[p] + slice_start * out->linesize[p],
108  in->linesize[p], threshold->linesize[p],
109  min->linesize[p], max->linesize[p],
110  out->linesize[p],
111  s->width[p], slice_end - slice_start);
112  }
113 
114  return 0;
115 }
116 
118 {
119  AVFilterContext *ctx = fs->parent;
120  ThresholdContext *s = fs->opaque;
121  AVFilterLink *outlink = ctx->outputs[0];
122  AVFrame *out, *in, *threshold, *min, *max;
123  ThreadData td;
124  int ret;
125 
126  if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
127  (ret = ff_framesync_get_frame(&s->fs, 1, &threshold, 0)) < 0 ||
128  (ret = ff_framesync_get_frame(&s->fs, 2, &min, 0)) < 0 ||
129  (ret = ff_framesync_get_frame(&s->fs, 3, &max, 0)) < 0)
130  return ret;
131 
132  if (ctx->is_disabled) {
133  out = av_frame_clone(in);
134  if (!out)
135  return AVERROR(ENOMEM);
136  } else {
137  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
138  if (!out)
139  return AVERROR(ENOMEM);
140  av_frame_copy_props(out, in);
141 
142  td.out = out;
143  td.in = in;
144  td.threshold = threshold;
145  td.min = min;
146  td.max = max;
147  ctx->internal->execute(ctx, filter_slice, &td, NULL,
148  FFMIN(s->height[2], ff_filter_get_nb_threads(ctx)));
149  }
150 
151  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
152 
153  return ff_filter_frame(outlink, out);
154 }
155 
156 static void threshold8(const uint8_t *in, const uint8_t *threshold,
157  const uint8_t *min, const uint8_t *max,
158  uint8_t *out,
159  ptrdiff_t ilinesize, ptrdiff_t tlinesize,
160  ptrdiff_t flinesize, ptrdiff_t slinesize,
161  ptrdiff_t olinesize,
162  int w, int h)
163 {
164  int x, y;
165 
166  for (y = 0; y < h; y++) {
167  for (x = 0; x < w; x++) {
168  out[x] = in[x] < threshold[x] ? min[x] : max[x];
169  }
170 
171  in += ilinesize;
172  threshold += tlinesize;
173  min += flinesize;
174  max += slinesize;
175  out += olinesize;
176  }
177 }
178 
179 static void threshold16(const uint8_t *iin, const uint8_t *tthreshold,
180  const uint8_t *ffirst, const uint8_t *ssecond,
181  uint8_t *oout,
182  ptrdiff_t ilinesize, ptrdiff_t tlinesize,
183  ptrdiff_t flinesize, ptrdiff_t slinesize,
184  ptrdiff_t olinesize,
185  int w, int h)
186 {
187  const uint16_t *in = (const uint16_t *)iin;
188  const uint16_t *threshold = (const uint16_t *)tthreshold;
189  const uint16_t *min = (const uint16_t *)ffirst;
190  const uint16_t *max = (const uint16_t *)ssecond;
191  uint16_t *out = (uint16_t *)oout;
192  int x, y;
193 
194  for (y = 0; y < h; y++) {
195  for (x = 0; x < w; x++) {
196  out[x] = in[x] < threshold[x] ? min[x] : max[x];
197  }
198 
199  in += ilinesize / 2;
200  threshold += tlinesize / 2;
201  min += flinesize / 2;
202  max += slinesize / 2;
203  out += olinesize / 2;
204  }
205 }
206 
208 {
209  AVFilterContext *ctx = inlink->dst;
210  ThresholdContext *s = ctx->priv;
212  int vsub, hsub;
213 
215 
216  hsub = desc->log2_chroma_w;
217  vsub = desc->log2_chroma_h;
218  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
219  s->height[0] = s->height[3] = inlink->h;
220  s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
221  s->width[0] = s->width[3] = inlink->w;
222  s->depth = desc->comp[0].depth;
223 
225 
226  return 0;
227 }
228 
230 {
231  if (s->depth == 8) {
232  s->threshold = threshold8;
233  s->bpc = 1;
234  } else {
235  s->threshold = threshold16;
236  s->bpc = 2;
237  }
238 
239  if (ARCH_X86)
241 }
242 
243 static int config_output(AVFilterLink *outlink)
244 {
245  AVFilterContext *ctx = outlink->src;
246  ThresholdContext *s = ctx->priv;
247  AVFilterLink *base = ctx->inputs[0];
248  AVFilterLink *threshold = ctx->inputs[1];
249  AVFilterLink *min = ctx->inputs[2];
250  AVFilterLink *max = ctx->inputs[3];
251  FFFrameSyncIn *in;
252  int ret;
253 
254  if (base->format != threshold->format ||
255  base->format != min->format ||
256  base->format != max->format) {
257  av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
258  return AVERROR(EINVAL);
259  }
260  if (base->w != threshold->w ||
261  base->h != threshold->h ||
262  base->w != min->w ||
263  base->h != min->h ||
264  base->w != max->w ||
265  base->h != max->h) {
266  av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
267  "(size %dx%d) do not match the corresponding "
268  "second input link %s parameters (%dx%d) "
269  "and/or third input link %s parameters (%dx%d) "
270  "and/or fourth input link %s parameters (%dx%d)\n",
271  ctx->input_pads[0].name, base->w, base->h,
272  ctx->input_pads[1].name, threshold->w, threshold->h,
273  ctx->input_pads[2].name, min->w, min->h,
274  ctx->input_pads[3].name, max->w, max->h);
275  return AVERROR(EINVAL);
276  }
277 
278  outlink->w = base->w;
279  outlink->h = base->h;
280  outlink->sample_aspect_ratio = base->sample_aspect_ratio;
281  outlink->frame_rate = base->frame_rate;
282 
283  if ((ret = ff_framesync_init(&s->fs, ctx, 4)) < 0)
284  return ret;
285 
286  in = s->fs.in;
287  in[0].time_base = base->time_base;
288  in[1].time_base = threshold->time_base;
289  in[2].time_base = min->time_base;
290  in[3].time_base = max->time_base;
291  in[0].sync = 1;
292  in[0].before = EXT_STOP;
293  in[0].after = EXT_STOP;
294  in[1].sync = 1;
295  in[1].before = EXT_STOP;
296  in[1].after = EXT_STOP;
297  in[2].sync = 1;
298  in[2].before = EXT_STOP;
299  in[2].after = EXT_STOP;
300  in[3].sync = 1;
301  in[3].before = EXT_STOP;
302  in[3].after = EXT_STOP;
303  s->fs.opaque = s;
305 
306  ret = ff_framesync_configure(&s->fs);
307  outlink->time_base = s->fs.time_base;
308 
309  return ret;
310 }
311 
313 {
314  ThresholdContext *s = ctx->priv;
315  return ff_framesync_activate(&s->fs);
316 }
317 
319 {
320  ThresholdContext *s = ctx->priv;
321 
322  ff_framesync_uninit(&s->fs);
323 }
324 
325 static const AVFilterPad inputs[] = {
326  {
327  .name = "default",
328  .type = AVMEDIA_TYPE_VIDEO,
329  .config_props = config_input,
330  },
331  {
332  .name = "threshold",
333  .type = AVMEDIA_TYPE_VIDEO,
334  },
335  {
336  .name = "min",
337  .type = AVMEDIA_TYPE_VIDEO,
338  },
339  {
340  .name = "max",
341  .type = AVMEDIA_TYPE_VIDEO,
342  },
343  { NULL }
344 };
345 
346 static const AVFilterPad outputs[] = {
347  {
348  .name = "default",
349  .type = AVMEDIA_TYPE_VIDEO,
350  .config_props = config_output,
351  },
352  { NULL }
353 };
354 
356  .name = "threshold",
357  .description = NULL_IF_CONFIG_SMALL("Threshold first video stream using other video streams."),
358  .priv_size = sizeof(ThresholdContext),
359  .priv_class = &threshold_class,
360  .uninit = uninit,
362  .activate = activate,
363  .inputs = inputs,
364  .outputs = outputs,
366 };
static int activate(AVFilterContext *ctx)
Definition: vf_threshold.c:312
static int config_input(AVFilterLink *inlink)
Definition: vf_threshold.c:207
#define NULL
Definition: coverity.c:32
static const struct @314 planes[]
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:430
AVFrame * out
Definition: af_adeclick.c:488
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:422
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:424
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:407
void ff_threshold_init_x86(ThresholdContext *s)
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:425
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2562
Main libavfilter public API header.
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:403
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:367
static int process_frame(FFFrameSync *fs)
Definition: vf_threshold.c:117
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:117
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:99
static int query_formats(AVFilterContext *ctx)
Definition: vf_threshold.c:46
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
int64_t pts
Timestamp of the current event.
Definition: framesync.h:167
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
void(* threshold)(const uint8_t *in, const uint8_t *threshold, const uint8_t *min, const uint8_t *max, uint8_t *out, ptrdiff_t ilinesize, ptrdiff_t tlinesize, ptrdiff_t flinesize, ptrdiff_t slinesize, ptrdiff_t olinesize, int w, int h)
Definition: threshold.h:37
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:86
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:368
const char * name
Pad name.
Definition: internal.h:60
AVFilterContext * parent
Parent filter context.
Definition: framesync.h:152
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:369
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1080
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
AVOptions.
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:388
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:421
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:402
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:400
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
Input stream structure.
Definition: framesync.h:81
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:429
#define av_log(a,...)
FFFrameSync fs
Definition: threshold.h:46
A filter pad used for either input or output.
Definition: internal.h:54
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
AVFilterPad * input_pads
array of input pads
Definition: avfilter.h:345
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
#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:568
#define td
Definition: regdef.h:70
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:293
Frame sync structure.
Definition: framesync.h:146
#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
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:431
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:408
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:96
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter&#39;s input and try to produce output.
Definition: framesync.c:344
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:390
int(* on_event)(struct FFFrameSync *fs)
Callback called when a frame event is ready.
Definition: framesync.h:172
#define OFFSET(x)
Definition: vf_threshold.c:36
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:409
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
common internal API header
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:385
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:406
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:802
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:371
#define FFMIN(a, b)
Definition: common.h:96
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
#define FLAGS
Definition: vf_threshold.c:37
static const AVFilterPad inputs[]
Definition: vf_threshold.c:325
AVFormatContext * ctx
Definition: movenc.c:48
AVRational time_base
Time base for the output events.
Definition: framesync.h:162
static const AVFilterPad outputs[]
Definition: vf_threshold.c:346
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:426
void * opaque
Opaque pointer, not used by the API.
Definition: framesync.h:177
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:386
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:405
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:398
static void threshold16(const uint8_t *iin, const uint8_t *tthreshold, const uint8_t *ffirst, const uint8_t *ssecond, uint8_t *oout, ptrdiff_t ilinesize, ptrdiff_t tlinesize, ptrdiff_t flinesize, ptrdiff_t slinesize, ptrdiff_t olinesize, int w, int h)
Definition: vf_threshold.c:179
Used for passing data between threads.
Definition: af_adeclick.c:487
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:77
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:370
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_threshold.c:79
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:387
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events...
Definition: framesync.h:139
Filter definition.
Definition: avfilter.h:144
static void threshold8(const uint8_t *in, const uint8_t *threshold, const uint8_t *min, const uint8_t *max, uint8_t *out, ptrdiff_t ilinesize, ptrdiff_t tlinesize, ptrdiff_t flinesize, ptrdiff_t slinesize, ptrdiff_t olinesize, int w, int h)
Definition: vf_threshold.c:156
const char * name
Filter name.
Definition: avfilter.h:148
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:384
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:133
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
AVFrame * min
Definition: vf_threshold.c:74
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_threshold.c:318
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:404
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:388
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
AVFrame * base
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
AVFilter ff_vf_threshold
Definition: vf_threshold.c:355
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
AVFrame * threshold
Definition: vf_threshold.c:73
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:423
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
void ff_threshold_init(ThresholdContext *s)
Definition: vf_threshold.c:229
avfilter_execute_func * execute
Definition: internal.h:155
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2029
Completely stop all streams with this one.
Definition: framesync.h:65
static int config_output(AVFilterLink *outlink)
Definition: vf_threshold.c:243
const AVPixFmtDescriptor * desc
Definition: vf_tonemap.c:196
AVFILTER_DEFINE_CLASS(threshold)
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
An instance of a filter.
Definition: avfilter.h:338
static const AVOption threshold_options[]
Definition: vf_threshold.c:39
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
AVFrame * in
Definition: af_afftdn.c:1082
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:338
AVFilterLink * inlink
Definition: vf_blend.c:56
internal API functions
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:256
int depth
Number of bits in the component.
Definition: pixdesc.h:58
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:399
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
AVFrame * max
Definition: vf_threshold.c:75
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58