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[] = {
68  };
69 
70  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
71 }
72 
73 typedef struct ThreadData {
74  AVFrame *in;
78  AVFrame *out;
79 } ThreadData;
80 
81 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
82 {
83  ThresholdContext *s = ctx->priv;
84  ThreadData *td = arg;
85  AVFrame *min = td->min;
86  AVFrame *max = td->max;
88  AVFrame *in = td->in;
89  AVFrame *out = td->out;
90 
91  for (int p = 0; p < s->nb_planes; p++) {
92  const int h = s->height[p];
93  const int slice_start = (h * jobnr) / nb_jobs;
94  const int slice_end = (h * (jobnr+1)) / nb_jobs;
95 
96  if (!(s->planes & (1 << p))) {
97  av_image_copy_plane(out->data[p] + slice_start * out->linesize[p],
98  out->linesize[p],
99  in->data[p] + slice_start * in->linesize[p],
100  in->linesize[p],
101  s->width[p] * s->bpc,
102  slice_end - slice_start);
103  continue;
104  }
105  s->threshold(in->data[p] + slice_start * in->linesize[p],
106  threshold->data[p] + slice_start * threshold->linesize[p],
107  min->data[p] + slice_start * min->linesize[p],
108  max->data[p] + slice_start * max->linesize[p],
109  out->data[p] + slice_start * out->linesize[p],
110  in->linesize[p], threshold->linesize[p],
111  min->linesize[p], max->linesize[p],
112  out->linesize[p],
113  s->width[p], slice_end - slice_start);
114  }
115 
116  return 0;
117 }
118 
120 {
121  AVFilterContext *ctx = fs->parent;
122  ThresholdContext *s = fs->opaque;
123  AVFilterLink *outlink = ctx->outputs[0];
124  AVFrame *out, *in, *threshold, *min, *max;
125  ThreadData td;
126  int ret;
127 
128  if ((ret = ff_framesync_get_frame(&s->fs, 0, &in, 0)) < 0 ||
129  (ret = ff_framesync_get_frame(&s->fs, 1, &threshold, 0)) < 0 ||
130  (ret = ff_framesync_get_frame(&s->fs, 2, &min, 0)) < 0 ||
131  (ret = ff_framesync_get_frame(&s->fs, 3, &max, 0)) < 0)
132  return ret;
133 
134  if (ctx->is_disabled) {
135  out = av_frame_clone(in);
136  if (!out)
137  return AVERROR(ENOMEM);
138  } else {
139  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
140  if (!out)
141  return AVERROR(ENOMEM);
142  av_frame_copy_props(out, in);
143 
144  td.out = out;
145  td.in = in;
146  td.threshold = threshold;
147  td.min = min;
148  td.max = max;
149  ctx->internal->execute(ctx, filter_slice, &td, NULL,
150  FFMIN(s->height[2], ff_filter_get_nb_threads(ctx)));
151  }
152 
153  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
154 
155  return ff_filter_frame(outlink, out);
156 }
157 
158 static void threshold8(const uint8_t *in, const uint8_t *threshold,
159  const uint8_t *min, const uint8_t *max,
160  uint8_t *out,
161  ptrdiff_t ilinesize, ptrdiff_t tlinesize,
162  ptrdiff_t flinesize, ptrdiff_t slinesize,
163  ptrdiff_t olinesize,
164  int w, int h)
165 {
166  int x, y;
167 
168  for (y = 0; y < h; y++) {
169  for (x = 0; x < w; x++) {
170  out[x] = in[x] < threshold[x] ? min[x] : max[x];
171  }
172 
173  in += ilinesize;
174  threshold += tlinesize;
175  min += flinesize;
176  max += slinesize;
177  out += olinesize;
178  }
179 }
180 
181 static void threshold16(const uint8_t *iin, const uint8_t *tthreshold,
182  const uint8_t *ffirst, const uint8_t *ssecond,
183  uint8_t *oout,
184  ptrdiff_t ilinesize, ptrdiff_t tlinesize,
185  ptrdiff_t flinesize, ptrdiff_t slinesize,
186  ptrdiff_t olinesize,
187  int w, int h)
188 {
189  const uint16_t *in = (const uint16_t *)iin;
190  const uint16_t *threshold = (const uint16_t *)tthreshold;
191  const uint16_t *min = (const uint16_t *)ffirst;
192  const uint16_t *max = (const uint16_t *)ssecond;
193  uint16_t *out = (uint16_t *)oout;
194  int x, y;
195 
196  for (y = 0; y < h; y++) {
197  for (x = 0; x < w; x++) {
198  out[x] = in[x] < threshold[x] ? min[x] : max[x];
199  }
200 
201  in += ilinesize / 2;
202  threshold += tlinesize / 2;
203  min += flinesize / 2;
204  max += slinesize / 2;
205  out += olinesize / 2;
206  }
207 }
208 
210 {
211  AVFilterContext *ctx = inlink->dst;
212  ThresholdContext *s = ctx->priv;
214  int vsub, hsub;
215 
217 
218  hsub = desc->log2_chroma_w;
219  vsub = desc->log2_chroma_h;
220  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
221  s->height[0] = s->height[3] = inlink->h;
222  s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
223  s->width[0] = s->width[3] = inlink->w;
224  s->depth = desc->comp[0].depth;
225 
227 
228  return 0;
229 }
230 
232 {
233  if (s->depth == 8) {
234  s->threshold = threshold8;
235  s->bpc = 1;
236  } else {
237  s->threshold = threshold16;
238  s->bpc = 2;
239  }
240 
241  if (ARCH_X86)
243 }
244 
245 static int config_output(AVFilterLink *outlink)
246 {
247  AVFilterContext *ctx = outlink->src;
248  ThresholdContext *s = ctx->priv;
249  AVFilterLink *base = ctx->inputs[0];
250  AVFilterLink *threshold = ctx->inputs[1];
251  AVFilterLink *min = ctx->inputs[2];
252  AVFilterLink *max = ctx->inputs[3];
253  FFFrameSyncIn *in;
254  int ret;
255 
256  if (base->format != threshold->format ||
257  base->format != min->format ||
258  base->format != max->format) {
259  av_log(ctx, AV_LOG_ERROR, "inputs must be of same pixel format\n");
260  return AVERROR(EINVAL);
261  }
262  if (base->w != threshold->w ||
263  base->h != threshold->h ||
264  base->w != min->w ||
265  base->h != min->h ||
266  base->w != max->w ||
267  base->h != max->h) {
268  av_log(ctx, AV_LOG_ERROR, "First input link %s parameters "
269  "(size %dx%d) do not match the corresponding "
270  "second input link %s parameters (%dx%d) "
271  "and/or third input link %s parameters (%dx%d) "
272  "and/or fourth input link %s parameters (%dx%d)\n",
273  ctx->input_pads[0].name, base->w, base->h,
274  ctx->input_pads[1].name, threshold->w, threshold->h,
275  ctx->input_pads[2].name, min->w, min->h,
276  ctx->input_pads[3].name, max->w, max->h);
277  return AVERROR(EINVAL);
278  }
279 
280  outlink->w = base->w;
281  outlink->h = base->h;
282  outlink->sample_aspect_ratio = base->sample_aspect_ratio;
283  outlink->frame_rate = base->frame_rate;
284 
285  if ((ret = ff_framesync_init(&s->fs, ctx, 4)) < 0)
286  return ret;
287 
288  in = s->fs.in;
289  in[0].time_base = base->time_base;
290  in[1].time_base = threshold->time_base;
291  in[2].time_base = min->time_base;
292  in[3].time_base = max->time_base;
293  in[0].sync = 1;
294  in[0].before = EXT_STOP;
295  in[0].after = EXT_STOP;
296  in[1].sync = 1;
297  in[1].before = EXT_STOP;
298  in[1].after = EXT_STOP;
299  in[2].sync = 1;
300  in[2].before = EXT_STOP;
301  in[2].after = EXT_STOP;
302  in[3].sync = 1;
303  in[3].before = EXT_STOP;
304  in[3].after = EXT_STOP;
305  s->fs.opaque = s;
307 
308  ret = ff_framesync_configure(&s->fs);
309  outlink->time_base = s->fs.time_base;
310 
311  return ret;
312 }
313 
315 {
316  ThresholdContext *s = ctx->priv;
317  return ff_framesync_activate(&s->fs);
318 }
319 
321 {
322  ThresholdContext *s = ctx->priv;
323 
324  ff_framesync_uninit(&s->fs);
325 }
326 
327 static const AVFilterPad inputs[] = {
328  {
329  .name = "default",
330  .type = AVMEDIA_TYPE_VIDEO,
331  .config_props = config_input,
332  },
333  {
334  .name = "threshold",
335  .type = AVMEDIA_TYPE_VIDEO,
336  },
337  {
338  .name = "min",
339  .type = AVMEDIA_TYPE_VIDEO,
340  },
341  {
342  .name = "max",
343  .type = AVMEDIA_TYPE_VIDEO,
344  },
345  { NULL }
346 };
347 
348 static const AVFilterPad outputs[] = {
349  {
350  .name = "default",
351  .type = AVMEDIA_TYPE_VIDEO,
352  .config_props = config_output,
353  },
354  { NULL }
355 };
356 
358  .name = "threshold",
359  .description = NULL_IF_CONFIG_SMALL("Threshold first video stream using other video streams."),
360  .priv_size = sizeof(ThresholdContext),
361  .priv_class = &threshold_class,
362  .uninit = uninit,
364  .activate = activate,
365  .inputs = inputs,
366  .outputs = outputs,
368 };
static int activate(AVFilterContext *ctx)
Definition: vf_threshold.c:314
static int config_input(AVFilterLink *inlink)
Definition: vf_threshold.c:209
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
AVFrame * out
Definition: af_adeclick.c:502
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:401
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:434
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
int max
Definition: vf_ssim.c:233
AVOption.
Definition: opt.h:248
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:419
void ff_threshold_init_x86(ThresholdContext *s)
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
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:2613
Main libavfilter public API header.
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:415
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:379
static int process_frame(FFFrameSync *fs)
Definition: vf_threshold.c:119
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:124
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
static const struct @322 planes[]
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:388
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:287
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:380
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:381
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:349
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
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:88
#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:407
FFFrameSyncIn * in
Pointer to array of inputs.
Definition: framesync.h:203
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:433
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:414
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:412
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_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
#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:348
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:194
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:588
#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:290
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:115
void * priv
private data for use by the filter
Definition: avfilter.h:356
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:420
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:341
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
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:421
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:397
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:418
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:801
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:383
#define FFMIN(a, b)
Definition: common.h:105
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 AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:440
#define FLAGS
Definition: vf_threshold.c:37
static const AVFilterPad inputs[]
Definition: vf_threshold.c:327
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:348
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
void * opaque
Opaque pointer, not used by the API.
Definition: framesync.h:177
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:398
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:417
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:410
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:181
Used for passing data between threads.
Definition: dsddec.c:67
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:84
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:382
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_threshold.c:81
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
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:145
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:158
const char * name
Filter name.
Definition: avfilter.h:149
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:405
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
#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:134
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
AVFrame * min
Definition: vf_threshold.c:76
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_threshold.c:320
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:416
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:381
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:328
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:357
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
AVFrame * threshold
Definition: vf_threshold.c:75
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
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:231
avfilter_execute_func * execute
Definition: internal.h:136
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2033
Completely stop all streams with this one.
Definition: framesync.h:65
static int config_output(AVFilterLink *outlink)
Definition: vf_threshold.c:245
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:341
static const AVOption threshold_options[]
Definition: vf_threshold.c:39
const void ** s
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
AVFrame * in
Definition: af_adenorm.c:223
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:373
AVFilterLink * inlink
Definition: vf_blend.c:57
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:253
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:411
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:658
AVFrame * max
Definition: vf_threshold.c:77
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:439
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58