FFmpeg
vf_median.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2019 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  * Redistribution and use in source and binary forms, with or without modification,
20  * are permitted provided that the following conditions are met:
21  */
22 
23 #include "libavutil/avassert.h"
24 #include "libavutil/imgutils.h"
25 #include "libavutil/opt.h"
26 #include "libavutil/pixdesc.h"
27 #include "avfilter.h"
28 #include "formats.h"
29 #include "internal.h"
30 #include "median.h"
31 #include "video.h"
32 
33 #define DEPTH 8
34 #include "median_template.c"
35 
36 #undef DEPTH
37 #define DEPTH 9
38 #include "median_template.c"
39 
40 #undef DEPTH
41 #define DEPTH 10
42 #include "median_template.c"
43 
44 #undef DEPTH
45 #define DEPTH 12
46 #include "median_template.c"
47 
48 #undef DEPTH
49 #define DEPTH 14
50 #include "median_template.c"
51 
52 #undef DEPTH
53 #define DEPTH 16
54 #include "median_template.c"
55 
56 #define OFFSET(x) offsetof(MedianContext, x)
57 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
58 
59 static const AVOption median_options[] = {
60  { "radius", "set median radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=1}, 1, 127, FLAGS },
61  { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
62  { "radiusV", "set median vertical radius", OFFSET(radiusV), AV_OPT_TYPE_INT, {.i64=0},0, 127, FLAGS },
63  { "percentile", "set median percentile", OFFSET(percentile), AV_OPT_TYPE_FLOAT, {.dbl=.5}, 0., 1., FLAGS },
64  { NULL }
65 };
66 
67 AVFILTER_DEFINE_CLASS(median);
68 
69 static void hadd(htype *dst, const htype *src, int bins)
70 {
71  for (int i = 0; i < bins; i++)
72  dst[i] += src[i];
73 }
74 
75 static void hsub(htype *dst, const htype *src, int bins)
76 {
77  for (int i = 0; i < bins; i++)
78  dst[i] -= src[i];
79 }
80 
81 static void hmuladd(htype *dst, const htype *src, int f, int bins)
82 {
83  for (int i = 0; i < bins; i++)
84  dst[i] += f * src[i];
85 }
86 
88 {
89  static const enum AVPixelFormat pix_fmts[] = {
109  };
110 
111  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
112 }
113 
115 {
116  for (int i = 0; i < s->nb_planes; i++) {
117  if (!(s->planes & (1 << i)))
118  continue;
119 
120  if (s->planewidth[i] < s->radius * 2 + 1) {
121  av_log(inlink->dst, AV_LOG_WARNING, "The %d plane width %d must be not less than %d, clipping radius.\n", i, s->planewidth[i], s->radius * 2 + 1);
122  s->radius = (s->planewidth[i] - 1) / 2;
123  }
124 
125  if (s->planeheight[i] < s->radiusV * 2 + 1) {
126  av_log(inlink->dst, AV_LOG_WARNING, "The %d plane height %d must be not less than %d, clipping radiusV.\n", i, s->planeheight[i], s->radiusV * 2 + 1);
127  s->radiusV = (s->planeheight[i] - 1) / 2;
128  }
129  }
130 
131  s->t = (2 * s->radius * s->radiusV + s->radiusV + s->radius) * 2.f * s->percentile;
132 }
133 
135 {
137  MedianContext *s = inlink->dst->priv;
138 
139  s->depth = desc->comp[0].depth;
140  s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w);
141  s->planewidth[0] = s->planewidth[3] = inlink->w;
142  s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
143  s->planeheight[0] = s->planeheight[3] = inlink->h;
144 
145  s->radiusV = !s->radiusV ? s->radius : s->radiusV;
147 
148  check_params(s, inlink);
149 
150  s->nb_threads = FFMAX(1, FFMIN(s->planeheight[1] / (s->radiusV + 1), ff_filter_get_nb_threads(inlink->dst)));
151  s->bins = 1 << ((s->depth + 1) / 2);
152  s->fine_size = s->bins * s->bins * inlink->w;
153  s->coarse_size = s->bins * inlink->w;
154  s->coarse = av_calloc(s->nb_threads, sizeof(*s->coarse));
155  s->fine = av_calloc(s->nb_threads, sizeof(*s->fine));
156  if (!s->coarse || !s->fine)
157  return AVERROR(ENOMEM);
158  for (int i = 0; i < s->nb_threads; i++) {
159  s->coarse[i] = av_malloc_array(s->coarse_size, sizeof(**s->coarse));
160  s->fine[i] = av_malloc_array(s->fine_size, sizeof(**s->fine));
161  if (!s->coarse[i] || !s->fine[i])
162  return AVERROR(ENOMEM);
163  }
164 
165  s->hadd = hadd;
166  s->hsub = hsub;
167  s->hmuladd = hmuladd;
168 
169  switch (s->depth) {
170  case 8: s->filter_plane = filter_plane_8; break;
171  case 9: s->filter_plane = filter_plane_9; break;
172  case 10: s->filter_plane = filter_plane_10; break;
173  case 12: s->filter_plane = filter_plane_12; break;
174  case 14: s->filter_plane = filter_plane_14; break;
175  case 16: s->filter_plane = filter_plane_16; break;
176  }
177 
178  return 0;
179 }
180 
181 typedef struct ThreadData {
182  AVFrame *in, *out;
183 } ThreadData;
184 
185 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
186 {
187  MedianContext *s = ctx->priv;
188  ThreadData *td = arg;
189  AVFrame *in = td->in;
190  AVFrame *out = td->out;
191 
192  for (int plane = 0; plane < s->nb_planes; plane++) {
193  const int h = s->planeheight[plane];
194  const int w = s->planewidth[plane];
195  const int slice_h_start = (h * jobnr) / nb_jobs;
196  const int slice_h_end = (h * (jobnr+1)) / nb_jobs;
197 
198  if (!(s->planes & (1 << plane))) {
199  av_image_copy_plane(out->data[plane] + slice_h_start * out->linesize[plane],
200  out->linesize[plane],
201  in->data[plane] + slice_h_start * in->linesize[plane],
202  in->linesize[plane],
203  w * ((s->depth + 7) / 8),
204  slice_h_end - slice_h_start);
205  continue;
206  }
207 
208  s->filter_plane(ctx, in->data[plane],
209  in->linesize[plane],
210  out->data[plane] + slice_h_start * out->linesize[plane],
211  out->linesize[plane], w, h,
212  slice_h_start, slice_h_end, jobnr);
213  }
214 
215  return 0;
216 }
217 
219 {
220  AVFilterContext *ctx = inlink->dst;
221  MedianContext *s = ctx->priv;
222  AVFilterLink *outlink = ctx->outputs[0];
223  ThreadData td;
224  AVFrame *out;
225 
226  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
227  if (!out) {
228  av_frame_free(&in);
229  return AVERROR(ENOMEM);
230  }
231  av_frame_copy_props(out, in);
232 
233  td.in = in; td.out = out;
234  ctx->internal->execute(ctx, filter_slice, &td, NULL, s->nb_threads);
235 
236  av_frame_free(&in);
237  return ff_filter_frame(outlink, out);
238 }
239 
241 {
242  MedianContext *s = ctx->priv;
243 
244  for (int i = 0; i < s->nb_threads && s->coarse && s->fine; i++) {
245  av_freep(&s->coarse[i]);
246  av_freep(&s->fine[i]);
247  }
248 
249  av_freep(&s->coarse);
250  av_freep(&s->fine);
251 }
252 
253 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
254  char *res, int res_len, int flags)
255 {
256  MedianContext *s = ctx->priv;
257  int ret;
258 
259  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
260  if (ret < 0)
261  return ret;
262 
263  if (!s->radiusV)
264  s->radiusV = s->radius;
265  check_params(s, ctx->inputs[0]);
266 
267  return 0;
268 }
269 
270 static const AVFilterPad median_inputs[] = {
271  {
272  .name = "default",
273  .type = AVMEDIA_TYPE_VIDEO,
274  .config_props = config_input,
275  .filter_frame = filter_frame,
276  },
277  { NULL }
278 };
279 
280 static const AVFilterPad median_outputs[] = {
281  {
282  .name = "default",
283  .type = AVMEDIA_TYPE_VIDEO,
284  },
285  { NULL }
286 };
287 
289  .name = "median",
290  .description = NULL_IF_CONFIG_SMALL("Apply Median filter."),
291  .priv_size = sizeof(MedianContext),
292  .priv_class = &median_class,
293  .uninit = uninit,
295  .inputs = median_inputs,
296  .outputs = median_outputs,
299 };
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:440
AVFrame * out
Definition: af_adeclick.c:494
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:432
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2549
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:434
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:407
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_median.c:218
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:417
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:435
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2589
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:68
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:413
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:377
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:401
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_median.c:253
int nb_threads
Definition: median.h:40
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
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:244
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:378
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
Definition: avfilter.h:125
const char * name
Pad name.
Definition: internal.h:60
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:379
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:1075
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
#define av_cold
Definition: attributes.h:82
uint16_t ** coarse
Definition: median.h:42
AVOptions.
#define f(width, name)
Definition: cbs_vp9.c:255
int planeheight[4]
Definition: median.h:37
static int config_input(AVFilterLink *inlink)
Definition: vf_median.c:134
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:431
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:412
int plane
Definition: vf_blend.c:57
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
static void hmuladd(htype *dst, const htype *src, int f, int bins)
Definition: vf_median.c:81
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:410
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:402
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:439
static const AVFilterPad median_outputs[]
Definition: vf_median.c:280
static const AVOption median_options[]
Definition: vf_median.c:59
#define av_log(a,...)
A filter pad used for either input or output.
Definition: internal.h:54
#define src
Definition: vp8dsp.c:254
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
void(* filter_plane)(AVFilterContext *ctx, const uint8_t *ssrc, int src_linesize, uint8_t *ddst, int dst_linesize, int width, int height, int slice_h_start, int slice_h_end, int jobnr)
Definition: median.h:51
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:569
#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
uint16_t ** fine
Definition: median.h:42
int radius
Definition: median.h:32
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options...
Definition: avfilter.c:869
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:441
const char * arg
Definition: jacosubdec.c:66
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:418
simple assert() macros that are a bit more flexible than ISO C assert().
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:400
static void hadd(htype *dst, const htype *src, int bins)
Definition: vf_median.c:69
int fine_size
Definition: median.h:43
void(* hmuladd)(uint16_t *dst, const uint16_t *src, int f, int bins)
Definition: median.h:49
#define FFMAX(a, b)
Definition: common.h:94
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:419
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_median.c:185
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:395
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:416
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:784
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:381
#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 AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:438
void(* hadd)(uint16_t *dst, const uint16_t *src, int bins)
Definition: median.h:47
int bins
Definition: median.h:44
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:396
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:415
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:408
AVFilter ff_vf_median
Definition: vf_median.c:288
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:405
static const struct @306 planes[]
Used for passing data between threads.
Definition: dsddec.c:64
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:326
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:380
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
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:397
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
Filter definition.
Definition: avfilter.h:144
int planes
Definition: median.h:31
int planewidth[4]
Definition: median.h:36
int radiusV
Definition: median.h:33
#define htype
int depth
Definition: median.h:38
int nb_planes
Definition: median.h:39
const char * name
Filter name.
Definition: avfilter.h:148
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:403
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:394
#define OFFSET(x)
Definition: vf_median.c:56
AVFILTER_DEFINE_CLASS(median)
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
int coarse_size
Definition: median.h:43
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
static int query_formats(AVFilterContext *ctx)
Definition: vf_median.c:87
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:406
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:414
#define flags(name, subs,...)
Definition: cbs_av1.c:564
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:398
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:404
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
static void check_params(MedianContext *s, AVFilterLink *inlink)
Definition: vf_median.c:114
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
Y , 8bpp.
Definition: pixfmt.h:74
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:433
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
avfilter_execute_func * execute
Definition: internal.h:144
float percentile
Definition: median.h:34
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
#define FLAGS
Definition: vf_median.c:57
An instance of a filter.
Definition: avfilter.h:338
#define av_freep(p)
const void ** s
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
#define av_malloc_array(a, b)
AVFrame * in
Definition: af_afftdn.c:1083
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
static const AVFilterPad median_inputs[]
Definition: vf_median.c:270
int depth
Number of bits in the component.
Definition: pixdesc.h:58
void(* hsub)(uint16_t *dst, const uint16_t *src, int bins)
Definition: median.h:48
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:75
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:409
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:659
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:437
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_median.c:240