FFmpeg
vf_tmidequalizer.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2020 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/imgutils.h"
22 #include "libavutil/pixdesc.h"
23 #include "libavutil/opt.h"
24 #include "avfilter.h"
25 #include "formats.h"
26 #include "internal.h"
27 #include "video.h"
28 
29 typedef struct TMidEqualizerContext {
30  const AVClass *class;
31 
32  int planes;
33  int radius;
34  float sigma;
35 
37  int nb_frames;
38  int depth;
39  int f_frames;
40  int l_frames;
41  int del_frame;
42  int cur_frame;
43  int nb_planes;
45  float kernel[127];
46  float *histogram[4][256];
47  float *change[4];
48 
50 
51  void (*compute_histogram)(const uint8_t *ssrc, ptrdiff_t linesize,
52  int w, int h, float *histogram, size_t hsize);
53  void (*apply_contrast_change)(const uint8_t *src, ptrdiff_t src_linesize,
54  uint8_t *dst, ptrdiff_t dst_linesize,
55  int w, int h, float *change, float *orig);
57 
58 #define OFFSET(x) offsetof(TMidEqualizerContext, x)
59 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
60 
61 static const AVOption tmidequalizer_options[] = {
62  { "radius", "set radius", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=5}, 1, 127, FLAGS },
63  { "sigma", "set sigma", OFFSET(sigma), AV_OPT_TYPE_FLOAT, {.dbl=0.5}, 0, 1, FLAGS },
64  { "planes", "set planes", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=0xF}, 0, 0xF, FLAGS },
65  { NULL }
66 };
67 
68 AVFILTER_DEFINE_CLASS(tmidequalizer);
69 
71 {
72  static const enum AVPixelFormat pix_fmts[] = {
94  };
95 
96  return ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
97 }
98 
99 static void compute_contrast_function(const float *const histograms[256],
100  const float *const kernel,
101  int nb_frames, int radius, int hsize,
102  float *f, int idx)
103 {
104  const float *const h1 = histograms[idx];
105  int p2[256] = { 0 };
106 
107  for (int p1 = 0; p1 < hsize; p1++) {
108  float weight = 1.f;
109  float sum = p1 * weight;
110 
111  for (int j = 0; j < radius; j++) {
112  const int nidx = ((idx - radius + j) % nb_frames);
113  const float *const h2 = histograms[nidx < 0 ? nidx + nb_frames: nidx];
114  int k = j;
115 
116  for (; p2[k] < hsize && h2[p2[k]] < h1[p1]; p2[k]++);
117  if (p2[k] == hsize)
118  p2[k]--;
119 
120  weight += kernel[j];
121  sum += kernel[j] * p2[k];
122  }
123 
124  for (int j = radius + 1; j < nb_frames; j++) {
125  const int nidx = (idx - radius + j) % nb_frames;
126  const float *const h2 = histograms[nidx < 0 ? nidx + nb_frames: nidx];
127  int k = j;
128 
129  for (; p2[k] < hsize && h2[p2[k]] < h1[p1]; p2[k]++);
130  if (p2[k] == hsize)
131  p2[k]--;
132 
133  weight += kernel[j - radius - 1];
134  sum += kernel[j - radius - 1] * p2[k];
135  }
136 
137  f[p1] = sum / weight;
138  }
139 }
140 
141 static void apply_contrast_change8(const uint8_t *src, ptrdiff_t src_linesize,
142  uint8_t *dst, ptrdiff_t dst_linesize,
143  int w, int h, float *change, float *orig)
144 {
145  for (int y = 0; y < h; y++) {
146  for (int x = 0; x < w; x++)
147  dst[x] = lrintf(change[src[x]]);
148 
149  dst += dst_linesize;
150  src += src_linesize;
151  }
152 }
153 
154 static void apply_contrast_change16(const uint8_t *ssrc, ptrdiff_t src_linesize,
155  uint8_t *ddst, ptrdiff_t dst_linesize,
156  int w, int h, float *change, float *orig)
157 {
158  const uint16_t *src = (const uint16_t *)ssrc;
159  uint16_t *dst = (uint16_t *)ddst;
160 
161  for (int y = 0; y < h; y++) {
162  for (int x = 0; x < w; x++)
163  dst[x] = lrintf(change[src[x]]);
164 
165  dst += dst_linesize / 2;
166  src += src_linesize / 2;
167  }
168 }
169 
171 {
172  AVFilterContext *ctx = inlink->dst;
173  TMidEqualizerContext *s = ctx->priv;
174  AVFilterLink *outlink = ctx->outputs[0];
175  AVFrame *out;
176  int eof = 0;
177 
178  if (!in) {
179  int idx = s->f_frames < s->nb_frames ? s->radius : s->del_frame ? s->del_frame - 1 : s->nb_frames - 1;
180 
181  if (s->f_frames < s->nb_frames) {
182  s->l_frames = s->nb_frames - s->f_frames;
183  } else {
184  s->l_frames++;
185  }
186  in = av_frame_clone(s->frames[idx]);
187  if (!in)
188  return AVERROR(ENOMEM);
189  eof = 1;
190  }
191 
192  if (s->f_frames < s->nb_frames) {
193  s->frames[s->f_frames] = in;
194 
195  for (int p = 0; p < s->nb_planes; p++) {
196  s->compute_histogram(in->data[p], in->linesize[p],
197  s->plane_width[p], s->plane_height[p],
198  s->histogram[p][s->f_frames],
199  s->histogram_size);
200  }
201 
202  s->f_frames++;
203 
204  while (s->f_frames <= s->radius) {
205  s->frames[s->f_frames] = av_frame_clone(in);
206  if (!s->frames[s->f_frames])
207  return AVERROR(ENOMEM);
208  for (int p = 0; p < s->nb_planes; p++) {
209  memcpy(s->histogram[p][s->f_frames],
210  s->histogram[p][s->f_frames - 1],
211  s->histogram_size * sizeof(float));
212  }
213  s->f_frames++;
214  }
215 
216  if (!eof && s->f_frames < s->nb_frames) {
217  return 0;
218  } else {
219  while (s->f_frames < s->nb_frames) {
220  s->frames[s->f_frames] = av_frame_clone(in);
221  if (!s->frames[s->f_frames])
222  return AVERROR(ENOMEM);
223  for (int p = 0; p < s->nb_planes; p++) {
224  memcpy(s->histogram[p][s->f_frames],
225  s->histogram[p][s->f_frames - 1],
226  s->histogram_size * sizeof(float));
227  }
228  s->f_frames++;
229  }
230  }
231  s->cur_frame = s->radius;
232  s->del_frame = 0;
233  } else {
234  av_frame_free(&s->frames[s->del_frame]);
235  s->frames[s->del_frame] = in;
236 
237  for (int p = 0; p < s->nb_planes; p++) {
238  s->compute_histogram(in->data[p], in->linesize[p],
239  s->plane_width[p], s->plane_height[p],
240  s->histogram[p][s->del_frame],
241  s->histogram_size);
242  }
243 
244  s->del_frame++;
245  if (s->del_frame >= s->nb_frames)
246  s->del_frame = 0;
247  }
248 
249  if (ctx->is_disabled) {
250  const int idx = s->cur_frame;
251 
252  out = av_frame_clone(s->frames[idx]);
253  if (!out)
254  return AVERROR(ENOMEM);
255  } else {
256  const int idx = s->cur_frame;
257 
258  in = s->frames[idx];
259  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
260  if (!out)
261  return AVERROR(ENOMEM);
262  av_frame_copy_props(out, in);
263 
264  for (int p = 0; p < s->nb_planes; p++) {
265  if (!((1 << p) & s->planes)) {
266  av_image_copy_plane(out->data[p], out->linesize[p], in->data[p], in->linesize[p],
267  s->plane_width[p] * (1 + (s->depth > 8)), s->plane_height[p]);
268  continue;
269  }
270 
271  compute_contrast_function((const float *const *)s->histogram[p], s->kernel,
272  s->nb_frames, s->radius, s->histogram_size, s->change[p], idx);
273 
274  s->apply_contrast_change(in->data[p], in->linesize[p],
275  out->data[p], out->linesize[p],
276  s->plane_width[p], s->plane_height[p],
277  s->change[p], s->histogram[p][idx]);
278  }
279  }
280 
281  s->cur_frame++;
282  if (s->cur_frame >= s->nb_frames)
283  s->cur_frame = 0;
284 
285  return ff_filter_frame(outlink, out);
286 }
287 
288 static void compute_histogram8(const uint8_t *src, ptrdiff_t linesize,
289  int w, int h, float *histogram, size_t hsize)
290 {
291  memset(histogram, 0, hsize * sizeof(*histogram));
292 
293  for (int y = 0; y < h; y++) {
294  for (int x = 0; x < w; x++)
295  histogram[src[x]] += 1;
296  src += linesize;
297  }
298 
299  for (int x = 0; x < hsize; x++)
300  histogram[x] /= hsize;
301 
302  for (int x = 1; x < hsize; x++)
303  histogram[x] += histogram[x-1];
304 }
305 
306 static void compute_histogram16(const uint8_t *ssrc, ptrdiff_t linesize,
307  int w, int h, float *histogram, size_t hsize)
308 {
309  const uint16_t *src = (const uint16_t *)ssrc;
310 
311  memset(histogram, 0, hsize * sizeof(*histogram));
312 
313  for (int y = 0; y < h; y++) {
314  for (int x = 0; x < w; x++)
315  histogram[src[x]] += 1;
316  src += linesize / 2;
317  }
318 
319  for (int x = 0; x < hsize; x++)
320  histogram[x] /= hsize;
321 
322  for (int x = 1; x < hsize; x++)
323  histogram[x] += histogram[x-1];
324 }
325 
327 {
328  AVFilterContext *ctx = inlink->dst;
329  TMidEqualizerContext *s = ctx->priv;
331  float sigma = s->radius * s->sigma;
332  int vsub, hsub;
333 
334  s->depth = desc->comp[0].depth;
335  s->nb_frames = s->radius * 2 + 1;
337 
338  hsub = desc->log2_chroma_w;
339  vsub = desc->log2_chroma_h;
340 
341  s->plane_height[0] = s->plane_height[3] = inlink->h;
342  s->plane_width[0] = s->plane_width[3] = inlink->w;
343  s->plane_height[1] = s->plane_height[2] = AV_CEIL_RSHIFT(inlink->h, vsub);
344  s->plane_width[1] = s->plane_width[2] = AV_CEIL_RSHIFT(inlink->w, hsub);
345 
346  s->histogram_size = 1 << s->depth;
347 
348  for (int n = 0; n < s->radius; n++)
349  s->kernel[n] = expf(-0.5 * (n + 1) * (n + 1) / (sigma * sigma));
350 
351  for (int p = 0; p < s->nb_planes; p++) {
352  for (int n = 0; n < s->nb_frames; n++) {
353  s->histogram[p][n] = av_calloc(s->histogram_size, sizeof(float));
354  if (!s->histogram[p][n])
355  return AVERROR(ENOMEM);
356  }
357 
358  s->change[p] = av_calloc(s->histogram_size, sizeof(float));
359  if (!s->change[p])
360  return AVERROR(ENOMEM);
361  }
362 
363  if (!s->frames)
364  s->frames = av_calloc(s->nb_frames, sizeof(*s->frames));
365  if (!s->frames)
366  return AVERROR(ENOMEM);
367 
370 
371  return 0;
372 }
373 
374 static int request_frame(AVFilterLink *outlink)
375 {
376  AVFilterContext *ctx = outlink->src;
377  TMidEqualizerContext *s = ctx->priv;
378  int ret;
379 
380  ret = ff_request_frame(ctx->inputs[0]);
381  if (ret == AVERROR_EOF && s->l_frames < s->radius) {
382  ret = filter_frame(ctx->inputs[0], NULL);
383  }
384 
385  return ret;
386 }
387 
388 static void free_histograms(AVFilterContext *ctx, int x, int nb_frames)
389 {
390  TMidEqualizerContext *s = ctx->priv;
391 
392  for (int n = 0; n < nb_frames; n++)
393  av_freep(&s->histogram[x][n]);
394  av_freep(&s->change[x]);
395 }
396 
398 {
399  TMidEqualizerContext *s = ctx->priv;
400 
401  free_histograms(ctx, 0, s->nb_frames);
402  free_histograms(ctx, 1, s->nb_frames);
403  free_histograms(ctx, 2, s->nb_frames);
404  free_histograms(ctx, 3, s->nb_frames);
405 
406  for (int i = 0; i < s->nb_frames && s->frames; i++)
407  av_frame_free(&s->frames[i]);
408  av_freep(&s->frames);
409 }
410 
412  {
413  .name = "default",
414  .type = AVMEDIA_TYPE_VIDEO,
415  .config_props = config_input,
416  .filter_frame = filter_frame,
417  },
418  { NULL }
419 };
420 
422  {
423  .name = "default",
424  .type = AVMEDIA_TYPE_VIDEO,
425  .request_frame = request_frame,
426  },
427  { NULL }
428 };
429 
431  .name = "tmidequalizer",
432  .description = NULL_IF_CONFIG_SMALL("Apply Temporal Midway Equalization."),
433  .priv_size = sizeof(TMidEqualizerContext),
434  .uninit = uninit,
436  .inputs = tmidequalizer_inputs,
437  .outputs = tmidequalizer_outputs,
438  .priv_class = &tmidequalizer_class,
440 };
#define NULL
Definition: coverity.c:32
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
#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
AVOption.
Definition: opt.h:248
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:419
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
const char * desc
Definition: libsvtav1.c:79
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
AVFilter ff_vf_tmidequalizer
static void compute_histogram16(const uint8_t *ssrc, ptrdiff_t linesize, int w, int h, float *histogram, size_t hsize)
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:415
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:379
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
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
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:388
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:245
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
#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
AVOptions.
#define f(width, name)
Definition: cbs_vp9.c:255
#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
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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 AVERROR_EOF
End of file.
Definition: error.h:55
#define lrintf(x)
Definition: libm_mips.h:70
static const AVOption tmidequalizer_options[]
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:412
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
A filter pad used for either input or output.
Definition: internal.h:54
#define expf(x)
Definition: libm.h:283
#define src
Definition: vp8dsp.c:255
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.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:588
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
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:115
void * priv
private data for use by the filter
Definition: avfilter.h:356
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:420
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
static void compute_histogram8(const uint8_t *src, ptrdiff_t linesize, int w, int h, float *histogram, size_t hsize)
#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
static void free_histograms(AVFilterContext *ctx, int x, int nb_frames)
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:397
static int query_formats(AVFilterContext *ctx)
static int request_frame(AVFilterLink *outlink)
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:418
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:383
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
uint8_t w
Definition: llviddspenc.c:39
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
#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
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:410
void(* apply_contrast_change)(const uint8_t *src, ptrdiff_t src_linesize, uint8_t *dst, ptrdiff_t dst_linesize, int w, int h, float *change, float *orig)
static av_cold void uninit(AVFilterContext *ctx)
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
#define OFFSET(x)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
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
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
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
#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
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:145
AVFILTER_DEFINE_CLASS(tmidequalizer)
static int config_input(AVFilterLink *inlink)
void(* compute_histogram)(const uint8_t *ssrc, ptrdiff_t linesize, int w, int h, float *histogram, size_t hsize)
const char * name
Filter name.
Definition: avfilter.h:149
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
static const AVFilterPad tmidequalizer_inputs[]
#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
static void compute_contrast_function(const float *const histograms[256], const float *const kernel, int nb_frames, int radius, int hsize, float *f, int idx)
static int weight(int i, int blen, int offset)
Definition: diracdec.c:1561
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:408
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:416
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
float * histogram[4][256]
#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
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: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
#define FLAGS
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
static void apply_contrast_change16(const uint8_t *ssrc, ptrdiff_t src_linesize, uint8_t *ddst, ptrdiff_t dst_linesize, int w, int h, float *change, float *orig)
static const AVFilterPad tmidequalizer_outputs[]
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
FILE * out
Definition: movenc.c:54
#define av_freep(p)
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:407
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
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 depth
Number of bits in the component.
Definition: pixdesc.h:58
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:411
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:658
static void apply_contrast_change8(const uint8_t *src, ptrdiff_t src_linesize, uint8_t *dst, ptrdiff_t dst_linesize, int w, int h, float *change, float *orig)
int i
Definition: input.c:407
#define AV_PIX_FMT_YUVA422P12
Definition: pixfmt.h:439
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58