FFmpeg
vf_xmedian.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  */
20 
21 #include "libavutil/avstring.h"
22 #include "libavutil/imgutils.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/opt.h"
25 #include "libavutil/pixdesc.h"
26 #include "libavutil/qsort.h"
27 
28 #include "avfilter.h"
29 #include "formats.h"
30 #include "internal.h"
31 #include "framesync.h"
32 #include "video.h"
33 
34 typedef struct XMedianContext {
35  const AVClass *class;
37  int nb_inputs;
38  int nb_frames;
39  int planes;
40  float percentile;
41 
42  int xmedian;
43  int radius;
44  int index;
45  int depth;
46  int max;
47  int nb_planes;
48  int linesize[4];
49  int width[4];
50  int height[4];
51 
54 
55  int (*median_frames)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
57 
58 static const enum AVPixelFormat pixel_fmts[] = {
86 };
87 
89 {
90  XMedianContext *s = ctx->priv;
91 
92  if (!s->xmedian)
93  s->nb_inputs = s->radius * 2 + 1;
94 
95  if (s->nb_inputs & 1)
96  s->index = s->radius * 2.f * s->percentile;
97  else
98  s->index = av_clip(s->radius * 2.f * s->percentile, 1, s->nb_inputs - 1);
99  s->frames = av_calloc(s->nb_inputs, sizeof(*s->frames));
100  if (!s->frames)
101  return AVERROR(ENOMEM);
102 
103  return 0;
104 }
105 
106 typedef struct ThreadData {
107  AVFrame **in, *out;
108 } ThreadData;
109 
110 static int comparei(const void *p1, const void *p2)
111 {
112  int left = *(const int *)p1;
113  int right = *(const int *)p2;
114  return FFDIFFSIGN(left, right);
115 }
116 
117 static int median_frames16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
118 {
119  XMedianContext *s = ctx->priv;
120  ThreadData *td = arg;
121  AVFrame **in = td->in;
122  AVFrame *out = td->out;
123  const int nb_inputs = s->nb_inputs;
124  const int radius = s->radius;
125  const int index = s->index;
126  int values[256];
127 
128  for (int p = 0; p < s->nb_planes; p++) {
129  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
130  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
131  uint16_t *dst = (uint16_t *)(out->data[p] + slice_start * out->linesize[p]);
132 
133  if (!((1 << p) & s->planes)) {
134  av_image_copy_plane((uint8_t *)dst, out->linesize[p],
135  in[radius]->data[p] + slice_start * in[radius]->linesize[p],
136  in[radius]->linesize[p],
137  s->linesize[p], slice_end - slice_start);
138  continue;
139  }
140 
141  for (int y = slice_start; y < slice_end; y++) {
142  for (int x = 0; x < s->width[p]; x++) {
143  for (int i = 0; i < nb_inputs; i++) {
144  const uint16_t *src = (const uint16_t *)(in[i]->data[p] + y * in[i]->linesize[p]);
145  values[i] = src[x];
146  }
147 
148  AV_QSORT(values, nb_inputs, int, comparei);
149  if (nb_inputs & 1)
150  dst[x] = values[index];
151  else
152  dst[x] = (values[index] + values[index - 1]) >> 1;
153  }
154 
155  dst += out->linesize[p] / 2;
156  }
157  }
158 
159  return 0;
160 }
161 
162 static int median_frames8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
163 {
164  XMedianContext *s = ctx->priv;
165  ThreadData *td = arg;
166  AVFrame **in = td->in;
167  AVFrame *out = td->out;
168  const int nb_inputs = s->nb_inputs;
169  const int radius = s->radius;
170  const int index = s->index;
171  int values[256];
172 
173  for (int p = 0; p < s->nb_planes; p++) {
174  const int slice_start = (s->height[p] * jobnr) / nb_jobs;
175  const int slice_end = (s->height[p] * (jobnr+1)) / nb_jobs;
176  uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
177 
178  if (!((1 << p) & s->planes)) {
179  av_image_copy_plane(dst, out->linesize[p],
180  in[radius]->data[p] + slice_start * in[radius]->linesize[p],
181  in[radius]->linesize[p],
182  s->linesize[p], slice_end - slice_start);
183  continue;
184  }
185 
186  for (int y = slice_start; y < slice_end; y++) {
187  for (int x = 0; x < s->width[p]; x++) {
188  for (int i = 0; i < nb_inputs; i++)
189  values[i] = in[i]->data[p][y * in[i]->linesize[p] + x];
190 
191  AV_QSORT(values, nb_inputs, int, comparei);
192  if (nb_inputs & 1)
193  dst[x] = values[index];
194  else
195  dst[x] = (values[index] + values[index - 1]) >> 1;
196  }
197 
198  dst += out->linesize[p];
199  }
200  }
201 
202  return 0;
203 }
204 
206 {
207  AVFilterContext *ctx = fs->parent;
208  AVFilterLink *outlink = ctx->outputs[0];
209  XMedianContext *s = fs->opaque;
210  AVFrame **in = s->frames;
211  AVFrame *out;
212  ThreadData td;
213  int i, ret;
214 
215  for (i = 0; i < s->nb_inputs; i++) {
216  if ((ret = ff_framesync_get_frame(&s->fs, i, &in[i], 0)) < 0)
217  return ret;
218  }
219 
220  if (ctx->is_disabled) {
221  out = av_frame_clone(in[0]);
222  } else {
223  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
224  }
225  if (!out)
226  return AVERROR(ENOMEM);
227  out->pts = av_rescale_q(s->fs.pts, s->fs.time_base, outlink->time_base);
228 
229  if (!ctx->is_disabled) {
230  td.in = in;
231  td.out = out;
232  ff_filter_execute(ctx, s->median_frames, &td, NULL,
233  FFMIN(s->height[1], ff_filter_get_nb_threads(ctx)));
234  }
235 
236  return ff_filter_frame(outlink, out);
237 }
238 
239 static int config_output(AVFilterLink *outlink)
240 {
241  AVFilterContext *ctx = outlink->src;
242  XMedianContext *s = ctx->priv;
243  AVRational frame_rate = ctx->inputs[0]->frame_rate;
244  AVRational sar = ctx->inputs[0]->sample_aspect_ratio;
245  AVFilterLink *inlink = ctx->inputs[0];
246  int height = ctx->inputs[0]->h;
247  int width = ctx->inputs[0]->w;
248  FFFrameSyncIn *in;
249  int i, ret;
250 
251  for (int i = 1; i < s->nb_inputs && s->xmedian; i++) {
252  if (ctx->inputs[i]->h != height || ctx->inputs[i]->w != width) {
253  av_log(ctx, AV_LOG_ERROR, "Input %d size (%dx%d) does not match input %d size (%dx%d).\n", i, ctx->inputs[i]->w, ctx->inputs[i]->h, 0, width, height);
254  return AVERROR(EINVAL);
255  }
256  }
257 
258  s->desc = av_pix_fmt_desc_get(outlink->format);
259  if (!s->desc)
260  return AVERROR_BUG;
261  s->nb_planes = av_pix_fmt_count_planes(outlink->format);
262  s->depth = s->desc->comp[0].depth;
263  s->max = (1 << s->depth) - 1;
264 
265  if (s->depth <= 8)
266  s->median_frames = median_frames8;
267  else
268  s->median_frames = median_frames16;
269 
270  if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0)
271  return ret;
272 
273  s->width[1] = s->width[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
274  s->width[0] = s->width[3] = inlink->w;
275  s->height[1] = s->height[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
276  s->height[0] = s->height[3] = inlink->h;
277 
278  if (!s->xmedian)
279  return 0;
280 
281  outlink->w = width;
282  outlink->h = height;
283  outlink->frame_rate = frame_rate;
284  outlink->sample_aspect_ratio = sar;
285 
286  if ((ret = ff_framesync_init(&s->fs, ctx, s->nb_inputs)) < 0)
287  return ret;
288 
289  in = s->fs.in;
290  s->fs.opaque = s;
291  s->fs.on_event = process_frame;
292 
293  for (i = 0; i < s->nb_inputs; i++) {
294  AVFilterLink *inlink = ctx->inputs[i];
295 
296  in[i].time_base = inlink->time_base;
297  in[i].sync = 1;
298  in[i].before = EXT_STOP;
299  in[i].after = EXT_INFINITY;
300  }
301 
302  ret = ff_framesync_configure(&s->fs);
303  outlink->time_base = s->fs.time_base;
304 
305  return ret;
306 }
307 
309 {
310  XMedianContext *s = ctx->priv;
311 
312  ff_framesync_uninit(&s->fs);
313 
314  for (int i = 0; i < s->nb_frames && s->frames && !s->xmedian; i++)
315  av_frame_free(&s->frames[i]);
316  av_freep(&s->frames);
317 }
318 
320 {
321  XMedianContext *s = ctx->priv;
322  return ff_framesync_activate(&s->fs);
323 }
324 
325 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
326  char *res, int res_len, int flags)
327 {
328  XMedianContext *s = ctx->priv;
329  int ret;
330 
331  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
332  if (ret < 0)
333  return ret;
334 
335  if (s->nb_inputs & 1)
336  s->index = s->radius * 2.f * s->percentile;
337  else
338  s->index = av_clip(s->radius * 2.f * s->percentile, 1, s->nb_inputs - 1);
339 
340  return 0;
341 }
342 
343 #if CONFIG_XMEDIAN_FILTER
344 static av_cold int xmedian_init(AVFilterContext *ctx)
345 {
346  XMedianContext *s = ctx->priv;
347  int ret;
348 
349  s->xmedian = 1;
350 
351  s->radius = s->nb_inputs / 2;
352 
353  for (int i = 0; i < s->nb_inputs; i++) {
354  AVFilterPad pad = { 0 };
355 
356  pad.type = AVMEDIA_TYPE_VIDEO;
357  pad.name = av_asprintf("input%d", i);
358  if (!pad.name)
359  return AVERROR(ENOMEM);
360 
361  if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
362  return ret;
363  }
364 
365  return init(ctx);
366 }
367 
368 #define OFFSET(x) offsetof(XMedianContext, x)
369 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
370 #define TFLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_RUNTIME_PARAM
371 
372 static const AVOption xmedian_options[] = {
373  { "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=3}, 3, 255, .flags = FLAGS },
374  { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags =TFLAGS },
375  { "percentile", "set percentile", OFFSET(percentile),AV_OPT_TYPE_FLOAT,{.dbl=0.5}, 0, 1, .flags =TFLAGS },
376  { NULL },
377 };
378 
379 static const AVFilterPad outputs[] = {
380  {
381  .name = "default",
382  .type = AVMEDIA_TYPE_VIDEO,
383  .config_props = config_output,
384  },
385 };
386 
388 
389 const AVFilter ff_vf_xmedian = {
390  .name = "xmedian",
391  .description = NULL_IF_CONFIG_SMALL("Pick median pixels from several video inputs."),
392  .priv_size = sizeof(XMedianContext),
393  .priv_class = &xmedian_class,
396  .preinit = xmedian_framesync_preinit,
397  .init = xmedian_init,
398  .uninit = uninit,
399  .activate = activate,
402  .process_command = process_command,
403 };
404 
405 #endif /* CONFIG_XMEDIAN_FILTER */
406 
407 #if CONFIG_TMEDIAN_FILTER
408 static int tmedian_filter_frame(AVFilterLink *inlink, AVFrame *in)
409 {
410  AVFilterContext *ctx = inlink->dst;
411  AVFilterLink *outlink = ctx->outputs[0];
412  XMedianContext *s = ctx->priv;
413  ThreadData td;
414  AVFrame *out;
415 
416  if (s->nb_frames < s->nb_inputs) {
417  s->frames[s->nb_frames] = in;
418  s->nb_frames++;
419  if (s->nb_frames < s->nb_inputs)
420  return 0;
421  } else {
422  av_frame_free(&s->frames[0]);
423  memmove(&s->frames[0], &s->frames[1], sizeof(*s->frames) * (s->nb_inputs - 1));
424  s->frames[s->nb_inputs - 1] = in;
425  }
426 
427  if (ctx->is_disabled) {
428  out = av_frame_clone(s->frames[0]);
429  if (!out)
430  return AVERROR(ENOMEM);
431  return ff_filter_frame(outlink, out);
432  }
433 
434  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
435  if (!out)
436  return AVERROR(ENOMEM);
437  out->pts = s->frames[0]->pts;
438 
439  td.out = out;
440  td.in = s->frames;
441  ff_filter_execute(ctx, s->median_frames, &td, NULL,
442  FFMIN(s->height[0], ff_filter_get_nb_threads(ctx)));
443 
444  return ff_filter_frame(outlink, out);
445 }
446 
447 static const AVOption tmedian_options[] = {
448  { "radius", "set median filter radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=1}, 1, 127, .flags = FLAGS },
449  { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=15}, 0, 15, .flags =TFLAGS },
450  { "percentile", "set percentile", OFFSET(percentile), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, .flags =TFLAGS },
451  { NULL },
452 };
453 
454 static const AVFilterPad tmedian_inputs[] = {
455  {
456  .name = "default",
457  .type = AVMEDIA_TYPE_VIDEO,
458  .filter_frame = tmedian_filter_frame,
459  },
460 };
461 
462 static const AVFilterPad tmedian_outputs[] = {
463  {
464  .name = "default",
465  .type = AVMEDIA_TYPE_VIDEO,
466  .config_props = config_output,
467  },
468 };
469 
470 AVFILTER_DEFINE_CLASS(tmedian);
471 
472 const AVFilter ff_vf_tmedian = {
473  .name = "tmedian",
474  .description = NULL_IF_CONFIG_SMALL("Pick median pixels from successive frames."),
475  .priv_size = sizeof(XMedianContext),
476  .priv_class = &tmedian_class,
477  FILTER_INPUTS(tmedian_inputs),
478  FILTER_OUTPUTS(tmedian_outputs),
480  .init = init,
481  .uninit = uninit,
483  .process_command = process_command,
484 };
485 
486 #endif /* CONFIG_TMEDIAN_FILTER */
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:98
AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:434
AV_PIX_FMT_GBRAP16
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:413
FFFrameSyncIn::time_base
AVRational time_base
Time base for the incoming frames.
Definition: framesync.h:96
ff_framesync_configure
int ff_framesync_configure(FFFrameSync *fs)
Configure a frame sync structure.
Definition: framesync.c:119
td
#define td
Definition: regdef.h:70
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
av_clip
#define av_clip
Definition: common.h:96
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
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: vf_xmedian.c:325
ff_framesync_uninit
void ff_framesync_uninit(FFFrameSync *fs)
Free all memory currently allocated.
Definition: framesync.c:285
out
FILE * out
Definition: movenc.c:54
median_frames8
static int median_frames8(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_xmedian.c:162
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1018
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2564
ff_framesync_get_frame
int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe, unsigned get)
Get the current frame in an input.
Definition: framesync.c:248
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:171
inlink
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
Definition: filter_design.txt:212
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
XMedianContext::median_frames
int(* median_frames)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_xmedian.c:55
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
AV_PIX_FMT_YUVA422P9
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:426
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
pixdesc.h
index
fg index
Definition: ffmpeg_filter.c:168
AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:433
AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:428
AVOption
AVOption.
Definition: opt.h:247
data
const char data[16]
Definition: mxf.c:143
AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:391
FRAMESYNC_DEFINE_CLASS
#define FRAMESYNC_DEFINE_CLASS(name, context, field)
Definition: framesync.h:328
FLAGS
#define FLAGS
Definition: cmdutils.c:535
XMedianContext::nb_frames
int nb_frames
Definition: vf_xmedian.c:38
AV_PIX_FMT_YUV440P
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:153
FFFrameSync
Frame sync structure.
Definition: framesync.h:146
EXT_INFINITY
@ EXT_INFINITY
Extend the frame to infinity.
Definition: framesync.h:75
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:473
video.h
AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:429
AV_PIX_FMT_GRAY9
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:371
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
av_image_copy_plane
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:374
planes
static const struct @320 planes[]
formats.h
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2604
AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:425
EXT_STOP
@ EXT_STOP
Completely stop all streams with this one.
Definition: framesync.h:65
AV_PIX_FMT_GBRP14
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:409
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:205
XMedianContext::planes
int planes
Definition: vf_xmedian.c:39
XMedianContext::fs
FFFrameSync fs
Definition: vf_xmedian.c:53
AV_PIX_FMT_GBRP10
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:407
AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:435
FFFrameSyncIn
Input stream structure.
Definition: framesync.h:81
AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:389
AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:375
FFFrameSyncIn::sync
unsigned sync
Synchronization level: frames on input at the highest sync level will generate output frame events.
Definition: framesync.h:139
AVFILTER_FLAG_DYNAMIC_INPUTS
#define AVFILTER_FLAG_DYNAMIC_INPUTS
The number of the filter inputs is not determined just by AVFilter.inputs.
Definition: avfilter.h:110
config_output
static int config_output(AVFilterLink *outlink)
Definition: vf_xmedian.c:239
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:50
FFDIFFSIGN
#define FFDIFFSIGN(x, y)
Comparator.
Definition: macros.h:45
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:394
AV_PIX_FMT_YUVJ411P
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:248
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:403
AV_PIX_FMT_YUVJ422P
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
AV_PIX_FMT_GBRAP10
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:411
width
#define width
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_PIX_FMT_GBRAP12
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:412
AV_PIX_FMT_YUVA420P
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:404
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:51
XMedianContext::depth
int depth
Definition: vf_xmedian.c:45
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2041
outputs
static const AVFilterPad outputs[]
Definition: af_acontrast.c:172
AV_PIX_FMT_YUVA444P12
#define AV_PIX_FMT_YUVA444P12
Definition: pixfmt.h:432
AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:388
AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:402
process_frame
static int process_frame(FFFrameSync *fs)
Definition: vf_xmedian.c:205
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_PIX_FMT_GRAY14
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:374
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:424
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:141
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:191
AV_PIX_FMT_YUVJ444P
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
arg
const char * arg
Definition: jacosubdec.c:67
AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:372
AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:410
XMedianContext::width
int width[4]
Definition: vf_xmedian.c:49
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
fs
#define fs(width, name, subs,...)
Definition: cbs_vp9.c:259
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_xmedian.c:88
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
ff_append_inpad_free_name
int ff_append_inpad_free_name(AVFilterContext *f, AVFilterPad *p)
Definition: avfilter.c:144
AV_PIX_FMT_YUVJ420P
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
src
#define src
Definition: vp8dsp.c:255
AV_PIX_FMT_YUV440P10
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:393
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:392
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
AV_PIX_FMT_GBRP9
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:406
XMedianContext::height
int height[4]
Definition: vf_xmedian.c:50
TFLAGS
#define TFLAGS
Definition: af_afade.c:58
qsort.h
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:117
comparei
static int comparei(const void *p1, const void *p2)
Definition: vf_xmedian.c:110
AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:396
median_frames16
static int median_frames16(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_xmedian.c:117
AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:398
ff_filter_process_command
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:882
height
#define height
AV_PIX_FMT_YUVA444P
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:167
AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:430
ff_vf_xmedian
const AVFilter ff_vf_xmedian
XMedianContext::desc
const AVPixFmtDescriptor * desc
Definition: vf_xmedian.c:36
XMedianContext
Definition: vf_xmedian.c:34
internal.h
AVFILTER_DEFINE_CLASS
#define AVFILTER_DEFINE_CLASS(fname)
Definition: internal.h:326
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:227
XMedianContext::index
int index
Definition: vf_xmedian.c:44
pixel_fmts
static enum AVPixelFormat pixel_fmts[]
Definition: vf_xmedian.c:58
ff_vf_tmedian
const AVFilter ff_vf_tmedian
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AV_QSORT
#define AV_QSORT(p, num, type, cmp)
Quicksort This sort is fast, and fully inplace but not stable and it is possible to construct input t...
Definition: qsort.h:33
XMedianContext::linesize
int linesize[4]
Definition: vf_xmedian.c:48
AV_PIX_FMT_GBRP12
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:408
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:803
XMedianContext::max
int max
Definition: vf_xmedian.c:46
ThreadData
Used for passing data between threads.
Definition: dsddec.c:67
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
AV_PIX_FMT_YUVJ440P
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
Definition: pixfmt.h:100
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:56
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:271
AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:390
AVFilter
Filter definition.
Definition: avfilter.h:149
ret
ret
Definition: filter_design.txt:187
AVFilterPad::type
enum AVMediaType type
AVFilterPad type.
Definition: internal.h:61
XMedianContext::nb_inputs
int nb_inputs
Definition: vf_xmedian.c:37
AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:427
ff_framesync_init
int ff_framesync_init(FFFrameSync *fs, AVFilterContext *parent, unsigned nb_in)
Initialize a frame sync structure.
Definition: framesync.c:79
AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:395
XMedianContext::frames
AVFrame ** frames
Definition: vf_xmedian.c:52
left
Tag MUST be and< 10hcoeff half pel interpolation filter coefficients, hcoeff[0] are the 2 middle coefficients[1] are the next outer ones and so on, resulting in a filter like:...eff[2], hcoeff[1], hcoeff[0], hcoeff[0], hcoeff[1], hcoeff[2] ... the sign of the coefficients is not explicitly stored but alternates after each coeff and coeff[0] is positive, so ...,+,-,+,-,+,+,-,+,-,+,... hcoeff[0] is not explicitly stored but found by subtracting the sum of all stored coefficients with signs from 32 hcoeff[0]=32 - hcoeff[1] - hcoeff[2] - ... a good choice for hcoeff and htaps is htaps=6 hcoeff={40,-10, 2} an alternative which requires more computations at both encoder and decoder side and may or may not be better is htaps=8 hcoeff={42,-14, 6,-2}ref_frames minimum of the number of available reference frames and max_ref_frames for example the first frame after a key frame always has ref_frames=1spatial_decomposition_type wavelet type 0 is a 9/7 symmetric compact integer wavelet 1 is a 5/3 symmetric compact integer wavelet others are reserved stored as delta from last, last is reset to 0 if always_reset||keyframeqlog quality(logarithmic quantizer scale) stored as delta from last, last is reset to 0 if always_reset||keyframemv_scale stored as delta from last, last is reset to 0 if always_reset||keyframe FIXME check that everything works fine if this changes between framesqbias dequantization bias stored as delta from last, last is reset to 0 if always_reset||keyframeblock_max_depth maximum depth of the block tree stored as delta from last, last is reset to 0 if always_reset||keyframequant_table quantization tableHighlevel bitstream structure:==============================--------------------------------------------|Header|--------------------------------------------|------------------------------------|||Block0||||split?||||yes no||||......... intra?||||:Block01 :yes no||||:Block02 :....... ..........||||:Block03 ::y DC ::ref index:||||:Block04 ::cb DC ::motion x :||||......... :cr DC ::motion y :||||....... ..........|||------------------------------------||------------------------------------|||Block1|||...|--------------------------------------------|------------ ------------ ------------|||Y subbands||Cb subbands||Cr subbands||||--- ---||--- ---||--- ---|||||LL0||HL0||||LL0||HL0||||LL0||HL0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||LH0||HH0||||LH0||HH0||||LH0||HH0|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HL1||LH1||||HL1||LH1||||HL1||LH1|||||--- ---||--- ---||--- ---||||--- ---||--- ---||--- ---|||||HH1||HL2||||HH1||HL2||||HH1||HL2|||||...||...||...|||------------ ------------ ------------|--------------------------------------------Decoding process:=================------------|||Subbands|------------||||------------|Intra DC||||LL0 subband prediction ------------|\ Dequantization ------------------- \||Reference frames|\ IDWT|------- -------|Motion \|||Frame 0||Frame 1||Compensation . OBMC v -------|------- -------|--------------. \------> Frame n output Frame Frame<----------------------------------/|...|------------------- Range Coder:============Binary Range Coder:------------------- The implemented range coder is an adapted version based upon "Range encoding: an algorithm for removing redundancy from a digitised message." by G. N. N. Martin. The symbols encoded by the Snow range coder are bits(0|1). The associated probabilities are not fix but change depending on the symbol mix seen so far. bit seen|new state ---------+----------------------------------------------- 0|256 - state_transition_table[256 - old_state];1|state_transition_table[old_state];state_transition_table={ 0, 0, 0, 0, 0, 0, 0, 0, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 190, 191, 192, 194, 194, 195, 196, 197, 198, 199, 200, 201, 202, 202, 204, 205, 206, 207, 208, 209, 209, 210, 211, 212, 213, 215, 215, 216, 217, 218, 219, 220, 220, 222, 223, 224, 225, 226, 227, 227, 229, 229, 230, 231, 232, 234, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 248, 0, 0, 0, 0, 0, 0, 0};FIXME Range Coding of integers:------------------------- FIXME Neighboring Blocks:===================left and top are set to the respective blocks unless they are outside of the image in which case they are set to the Null block top-left is set to the top left block unless it is outside of the image in which case it is set to the left block if this block has no larger parent block or it is at the left side of its parent block and the top right block is not outside of the image then the top right block is used for top-right else the top-left block is used Null block y, cb, cr are 128 level, ref, mx and my are 0 Motion Vector Prediction:=========================1. the motion vectors of all the neighboring blocks are scaled to compensate for the difference of reference frames scaled_mv=(mv *(256 *(current_reference+1)/(mv.reference+1))+128)> the median of the scaled left
Definition: snow.txt:386
AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:400
OFFSET
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your see the OFFSET() macro
FFFrameSyncIn::before
enum FFFrameSyncExtMode before
Extrapolation mode for timestamps before the first frame.
Definition: framesync.h:86
XMedianContext::percentile
float percentile
Definition: vf_xmedian.c:40
framesync.h
XMedianContext::radius
int radius
Definition: vf_xmedian.c:43
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_PIX_FMT_YUVA422P12
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:431
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
avfilter.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_xmedian.c:308
values
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 the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return values
Definition: filter_design.txt:263
AV_PIX_FMT_YUV444P
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
activate
static int activate(AVFilterContext *ctx)
Definition: vf_xmedian.c:319
AVFilterContext
An instance of a filter.
Definition: avfilter.h:386
XMedianContext::nb_planes
int nb_planes
Definition: vf_xmedian.c:47
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:158
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:121
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
ThreadData::in
AVFrame * in
Definition: af_adecorrelate.c:154
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:192
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
XMedianContext::xmedian
int xmedian
Definition: vf_xmedian.c:42
AV_PIX_FMT_YUV411P
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#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:138
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
FFFrameSyncIn::after
enum FFFrameSyncExtMode after
Extrapolation mode for timestamps after the last frame.
Definition: framesync.h:91
AV_PIX_FMT_YUV440P12
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:397
AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:401
ff_framesync_activate
int ff_framesync_activate(FFFrameSync *fs)
Examine the frames in the filter's input and try to produce output.
Definition: framesync.c:336
avstring.h
AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:373
ff_filter_execute
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: internal.h:143
int
int
Definition: ffmpeg_filter.c:156
AV_PIX_FMT_YUVA422P
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:166
AV_PIX_FMT_YUV420P14
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:399