FFmpeg
vf_hqdn3d.c
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1 /*
2  * Copyright (c) 2003 Daniel Moreno <comac AT comac DOT darktech DOT org>
3  * Copyright (c) 2010 Baptiste Coudurier
4  * Copyright (c) 2012 Loren Merritt
5  *
6  * This file is part of FFmpeg, ported from MPlayer.
7  *
8  * FFmpeg is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation; either version 2 of the License, or
11  * (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License along
19  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21  */
22 
23 /**
24  * @file
25  * high quality 3d video denoiser, ported from MPlayer
26  * libmpcodecs/vf_hqdn3d.c.
27  */
28 
29 #include <float.h>
30 
31 #include "config.h"
32 #include "libavutil/attributes.h"
33 #include "libavutil/common.h"
34 #include "libavutil/pixdesc.h"
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/opt.h"
37 
38 #include "avfilter.h"
39 #include "formats.h"
40 #include "internal.h"
41 #include "video.h"
42 #include "vf_hqdn3d.h"
43 
44 #define LUT_BITS (depth==16 ? 8 : 4)
45 #define LOAD(x) (((depth == 8 ? src[x] : AV_RN16A(src + (x) * 2)) << (16 - depth))\
46  + (((1 << (16 - depth)) - 1) >> 1))
47 #define STORE(x,val) (depth == 8 ? dst[x] = (val) >> (16 - depth) : \
48  AV_WN16A(dst + (x) * 2, (val) >> (16 - depth)))
49 
51 static uint32_t lowpass(int prev, int cur, int16_t *coef, int depth)
52 {
53  int d = (prev - cur) >> (8 - LUT_BITS);
54  return cur + coef[d];
55 }
56 
58 static void denoise_temporal(uint8_t *src, uint8_t *dst,
59  uint16_t *frame_ant,
60  int w, int h, int sstride, int dstride,
61  int16_t *temporal, int depth)
62 {
63  long x, y;
64  uint32_t tmp;
65 
66  temporal += 256 << LUT_BITS;
67 
68  for (y = 0; y < h; y++) {
69  for (x = 0; x < w; x++) {
70  frame_ant[x] = tmp = lowpass(frame_ant[x], LOAD(x), temporal, depth);
71  STORE(x, tmp);
72  }
73  src += sstride;
74  dst += dstride;
75  frame_ant += w;
76  }
77 }
78 
81  uint8_t *src, uint8_t *dst,
82  uint16_t *line_ant, uint16_t *frame_ant,
83  int w, int h, int sstride, int dstride,
84  int16_t *spatial, int16_t *temporal, int depth)
85 {
86  long x, y;
87  uint32_t pixel_ant;
88  uint32_t tmp;
89 
90  spatial += 256 << LUT_BITS;
91  temporal += 256 << LUT_BITS;
92 
93  /* First line has no top neighbor. Only left one for each tmp and
94  * last frame */
95  pixel_ant = LOAD(0);
96  for (x = 0; x < w; x++) {
97  line_ant[x] = tmp = pixel_ant = lowpass(pixel_ant, LOAD(x), spatial, depth);
98  frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
99  STORE(x, tmp);
100  }
101 
102  for (y = 1; y < h; y++) {
103  src += sstride;
104  dst += dstride;
105  frame_ant += w;
106  if (s->denoise_row[depth]) {
107  s->denoise_row[depth](src, dst, line_ant, frame_ant, w, spatial, temporal);
108  continue;
109  }
110  pixel_ant = LOAD(0);
111  for (x = 0; x < w-1; x++) {
112  line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial, depth);
113  pixel_ant = lowpass(pixel_ant, LOAD(x+1), spatial, depth);
114  frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
115  STORE(x, tmp);
116  }
117  line_ant[x] = tmp = lowpass(line_ant[x], pixel_ant, spatial, depth);
118  frame_ant[x] = tmp = lowpass(frame_ant[x], tmp, temporal, depth);
119  STORE(x, tmp);
120  }
121 }
122 
125  uint8_t *src, uint8_t *dst,
126  uint16_t *line_ant, uint16_t **frame_ant_ptr,
127  int w, int h, int sstride, int dstride,
128  int16_t *spatial, int16_t *temporal, int depth)
129 {
130  // FIXME: For 16-bit depth, frame_ant could be a pointer to the previous
131  // filtered frame rather than a separate buffer.
132  long x, y;
133  uint16_t *frame_ant = *frame_ant_ptr;
134  if (!frame_ant) {
135  uint8_t *frame_src = src;
136  *frame_ant_ptr = frame_ant = av_malloc_array(w, h*sizeof(uint16_t));
137  if (!frame_ant)
138  return AVERROR(ENOMEM);
139  for (y = 0; y < h; y++, src += sstride, frame_ant += w)
140  for (x = 0; x < w; x++)
141  frame_ant[x] = LOAD(x);
142  src = frame_src;
143  frame_ant = *frame_ant_ptr;
144  }
145 
146  if (spatial[0])
147  denoise_spatial(s, src, dst, line_ant, frame_ant,
148  w, h, sstride, dstride, spatial, temporal, depth);
149  else
150  denoise_temporal(src, dst, frame_ant,
151  w, h, sstride, dstride, temporal, depth);
152  emms_c();
153  return 0;
154 }
155 
156 #define denoise(...) \
157  do { \
158  int ret = AVERROR_BUG; \
159  switch (s->depth) { \
160  case 8: ret = denoise_depth(__VA_ARGS__, 8); break; \
161  case 9: ret = denoise_depth(__VA_ARGS__, 9); break; \
162  case 10: ret = denoise_depth(__VA_ARGS__, 10); break; \
163  case 16: ret = denoise_depth(__VA_ARGS__, 16); break; \
164  } \
165  if (ret < 0) { \
166  av_frame_free(&out); \
167  if (!direct) \
168  av_frame_free(&in); \
169  return ret; \
170  } \
171  } while (0)
172 
173 static int16_t *precalc_coefs(double dist25, int depth)
174 {
175  int i;
176  double gamma, simil, C;
177  int16_t *ct = av_malloc((512<<LUT_BITS)*sizeof(int16_t));
178  if (!ct)
179  return NULL;
180 
181  gamma = log(0.25) / log(1.0 - FFMIN(dist25,252.0)/255.0 - 0.00001);
182 
183  for (i = -256<<LUT_BITS; i < 256<<LUT_BITS; i++) {
184  double f = ((i<<(9-LUT_BITS)) + (1<<(8-LUT_BITS)) - 1) / 512.0; // midpoint of the bin
185  simil = FFMAX(0, 1.0 - fabs(f) / 255.0);
186  C = pow(simil, gamma) * 256.0 * f;
187  ct[(256<<LUT_BITS)+i] = lrint(C);
188  }
189 
190  ct[0] = !!dist25;
191  return ct;
192 }
193 
194 #define PARAM1_DEFAULT 4.0
195 #define PARAM2_DEFAULT 3.0
196 #define PARAM3_DEFAULT 6.0
197 
199 {
200  HQDN3DContext *s = ctx->priv;
201 
202  if (!s->strength[LUMA_SPATIAL])
204  if (!s->strength[CHROMA_SPATIAL])
206  if (!s->strength[LUMA_TMP])
208  if (!s->strength[CHROMA_TMP])
210 
211  av_log(ctx, AV_LOG_VERBOSE, "ls:%f cs:%f lt:%f ct:%f\n",
214 
215  return 0;
216 }
217 
219 {
220  HQDN3DContext *s = ctx->priv;
221 
222  av_freep(&s->coefs[0]);
223  av_freep(&s->coefs[1]);
224  av_freep(&s->coefs[2]);
225  av_freep(&s->coefs[3]);
226  av_freep(&s->line[0]);
227  av_freep(&s->line[1]);
228  av_freep(&s->line[2]);
229  av_freep(&s->frame_prev[0]);
230  av_freep(&s->frame_prev[1]);
231  av_freep(&s->frame_prev[2]);
232 }
233 
235 {
236  static const enum AVPixelFormat pix_fmts[] = {
257  };
258  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
259  if (!fmts_list)
260  return AVERROR(ENOMEM);
261  return ff_set_common_formats(ctx, fmts_list);
262 }
263 
265 {
266  HQDN3DContext *s = inlink->dst->priv;
268  int i;
269 
270  uninit(inlink->dst);
271 
272  s->hsub = desc->log2_chroma_w;
273  s->vsub = desc->log2_chroma_h;
274  s->depth = desc->comp[0].depth;
275 
276  for (i = 0; i < 3; i++) {
277  s->line[i] = av_malloc_array(inlink->w, sizeof(*s->line[i]));
278  if (!s->line[i])
279  return AVERROR(ENOMEM);
280  }
281 
282  for (i = 0; i < 4; i++) {
283  s->coefs[i] = precalc_coefs(s->strength[i], s->depth);
284  if (!s->coefs[i])
285  return AVERROR(ENOMEM);
286  }
287 
288  if (ARCH_X86)
290 
291  return 0;
292 }
293 
294 typedef struct ThreadData {
295  AVFrame *in, *out;
296  int direct;
297 } ThreadData;
298 
299 static int do_denoise(AVFilterContext *ctx, void *data, int job_nr, int n_jobs)
300 {
301  HQDN3DContext *s = ctx->priv;
302  const ThreadData *td = data;
303  AVFrame *out = td->out;
304  AVFrame *in = td->in;
305  int direct = td->direct;
306 
307  denoise(s, in->data[job_nr], out->data[job_nr],
308  s->line[job_nr], &s->frame_prev[job_nr],
309  AV_CEIL_RSHIFT(in->width, (!!job_nr * s->hsub)),
310  AV_CEIL_RSHIFT(in->height, (!!job_nr * s->vsub)),
311  in->linesize[job_nr], out->linesize[job_nr],
312  s->coefs[job_nr ? CHROMA_SPATIAL : LUMA_SPATIAL],
313  s->coefs[job_nr ? CHROMA_TMP : LUMA_TMP]);
314 
315  return 0;
316 }
317 
319 {
320  AVFilterContext *ctx = inlink->dst;
321  AVFilterLink *outlink = ctx->outputs[0];
322 
323  AVFrame *out;
324  int direct = av_frame_is_writable(in) && !ctx->is_disabled;
325  ThreadData td;
326 
327  if (direct) {
328  out = in;
329  } else {
330  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
331  if (!out) {
332  av_frame_free(&in);
333  return AVERROR(ENOMEM);
334  }
335 
336  av_frame_copy_props(out, in);
337  }
338 
339  td.in = in;
340  td.out = out;
341  td.direct = direct;
342  /* one thread per plane */
343  ctx->internal->execute(ctx, do_denoise, &td, NULL, 3);
344 
345  if (ctx->is_disabled) {
346  av_frame_free(&out);
347  return ff_filter_frame(outlink, in);
348  }
349 
350  if (!direct)
351  av_frame_free(&in);
352 
353  return ff_filter_frame(outlink, out);
354 }
355 
356 #define OFFSET(x) offsetof(HQDN3DContext, x)
357 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM
358 static const AVOption hqdn3d_options[] = {
359  { "luma_spatial", "spatial luma strength", OFFSET(strength[LUMA_SPATIAL]), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
360  { "chroma_spatial", "spatial chroma strength", OFFSET(strength[CHROMA_SPATIAL]), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
361  { "luma_tmp", "temporal luma strength", OFFSET(strength[LUMA_TMP]), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
362  { "chroma_tmp", "temporal chroma strength", OFFSET(strength[CHROMA_TMP]), AV_OPT_TYPE_DOUBLE, { .dbl = 0.0 }, 0, DBL_MAX, FLAGS },
363  { NULL }
364 };
365 
366 AVFILTER_DEFINE_CLASS(hqdn3d);
367 
369  {
370  .name = "default",
371  .type = AVMEDIA_TYPE_VIDEO,
372  .config_props = config_input,
373  .filter_frame = filter_frame,
374  },
375  { NULL }
376 };
377 
378 
380  {
381  .name = "default",
382  .type = AVMEDIA_TYPE_VIDEO
383  },
384  { NULL }
385 };
386 
388  .name = "hqdn3d",
389  .description = NULL_IF_CONFIG_SMALL("Apply a High Quality 3D Denoiser."),
390  .priv_size = sizeof(HQDN3DContext),
391  .priv_class = &hqdn3d_class,
392  .init = init,
393  .uninit = uninit,
395  .inputs = avfilter_vf_hqdn3d_inputs,
396  .outputs = avfilter_vf_hqdn3d_outputs,
398 };
#define NULL
Definition: coverity.c:32
AVFrame * out
Definition: af_adeclick.c:488
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2522
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
AVOption.
Definition: opt.h:246
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:100
static const AVFilterPad avfilter_vf_hqdn3d_inputs[]
Definition: vf_hqdn3d.c:368
static const AVFilterPad avfilter_vf_hqdn3d_outputs[]
Definition: vf_hqdn3d.c:379
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
Main libavfilter public API header.
const char * desc
Definition: nvenc.c:68
#define LUMA_SPATIAL
Definition: vf_hqdn3d.h:42
#define FLAGS
Definition: vf_hqdn3d.c:357
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
#define src
Definition: vp8dsp.c:254
void(* denoise_row[17])(uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t *frame_ant, ptrdiff_t w, int16_t *spatial, int16_t *temporal)
Definition: vf_hqdn3d.h:39
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:92
void ff_hqdn3d_init_x86(HQDN3DContext *hqdn3d)
Macro definitions for various function/variable attributes.
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
const char * name
Pad name.
Definition: internal.h:60
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
uint8_t
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
uint16_t * frame_prev[3]
Definition: vf_hqdn3d.h:35
int direct
Definition: vf_hqdn3d.c:296
AVOptions.
#define f(width, name)
Definition: cbs_vp9.c:255
#define PARAM1_DEFAULT
Definition: vf_hqdn3d.c:194
uint16_t * line[3]
Definition: vf_hqdn3d.h:34
static av_always_inline void denoise_temporal(uint8_t *src, uint8_t *dst, uint16_t *frame_ant, int w, int h, int sstride, int dstride, int16_t *temporal, int depth)
Definition: vf_hqdn3d.c:58
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_LOG_VERBOSE
Detailed information.
Definition: log.h:192
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:400
#define av_log(a,...)
AVFilter ff_vf_hqdn3d
Definition: vf_hqdn3d.c:387
#define CHROMA_SPATIAL
Definition: vf_hqdn3d.h:44
A filter pad used for either input or output.
Definition: internal.h:54
static av_always_inline void denoise_spatial(HQDN3DContext *s, uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t *frame_ant, int w, int h, int sstride, int dstride, int16_t *spatial, int16_t *temporal, int depth)
Definition: vf_hqdn3d.c:80
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
int width
Definition: frame.h:353
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
#define LOAD(x)
Definition: vf_hqdn3d.c:45
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:202
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
int16_t * coefs[4]
Definition: vf_hqdn3d.h:33
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
double strength[4]
Definition: vf_hqdn3d.h:36
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:390
static int config_input(AVFilterLink *inlink)
Definition: vf_hqdn3d.c:264
#define FFMAX(a, b)
Definition: common.h:94
static int do_denoise(AVFilterContext *ctx, void *data, int job_nr, int n_jobs)
Definition: vf_hqdn3d.c:299
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:385
#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
uint8_t w
Definition: llviddspenc.c:38
AVFormatContext * ctx
Definition: movenc.c:48
static av_always_inline int denoise_depth(HQDN3DContext *s, uint8_t *src, uint8_t *dst, uint16_t *line_ant, uint16_t **frame_ant_ptr, int w, int h, int sstride, int dstride, int16_t *spatial, int16_t *temporal, int depth)
Definition: vf_hqdn3d.c:124
#define s(width, name)
Definition: cbs_vp9.c:257
static av_always_inline uint32_t lowpass(int prev, int cur, int16_t *coef, int depth)
Definition: vf_hqdn3d.c:51
double * data[MAX_DATA][NUM_PLANES]
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:386
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
s EdgeDetect Foobar g libavfilter vf_edgedetect c libavfilter vf_foobar c edit libavfilter and add an entry for foobar following the pattern of the other filters edit libavfilter allfilters and add an entry for foobar following the pattern of the other filters configure make j< whatever > ffmpeg ffmpeg i you should get a foobar png with Lena edge detected That s your new playground is ready Some little details about what s going which in turn will define variables for the build system and the C
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:398
#define OFFSET(x)
Definition: vf_hqdn3d.c:356
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:594
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
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define LUMA_TMP
Definition: vf_hqdn3d.h:43
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:387
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
#define LUT_BITS
Definition: vf_hqdn3d.c:44
#define CHROMA_TMP
Definition: vf_hqdn3d.h:45
Filter definition.
Definition: avfilter.h:144
const char * name
Filter name.
Definition: avfilter.h:148
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:384
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:133
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
#define PARAM3_DEFAULT
Definition: vf_hqdn3d.c:196
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:275
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_hqdn3d.c:318
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:388
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
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
#define PARAM2_DEFAULT
Definition: vf_hqdn3d.c:195
static const AVOption hqdn3d_options[]
Definition: vf_hqdn3d.c:358
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
common internal and external API header
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:155
static av_cold int init(AVFilterContext *ctx)
Definition: vf_hqdn3d.c:198
A list of supported formats for one end of a filter link.
Definition: formats.h:64
#define lrint
Definition: tablegen.h:53
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_hqdn3d.c:218
An instance of a filter.
Definition: avfilter.h:338
#define denoise(...)
Definition: vf_hqdn3d.c:156
int height
Definition: frame.h:353
#define av_freep(p)
static int16_t * precalc_coefs(double dist25, int depth)
Definition: vf_hqdn3d.c:173
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
#define av_always_inline
Definition: attributes.h:39
#define av_malloc_array(a, b)
AVFrame * in
Definition: af_afftdn.c:1082
AVFilterLink * inlink
Definition: vf_blend.c:56
internal API functions
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later.That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another.Frame references ownership and permissions
int depth
Number of bits in the component.
Definition: pixdesc.h:58
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
static int query_formats(AVFilterContext *ctx)
Definition: vf_hqdn3d.c:234
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:399
#define STORE(x, val)
Definition: vf_hqdn3d.c:47
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:654
AVFILTER_DEFINE_CLASS(hqdn3d)
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
static uint8_t tmp[11]
Definition: aes_ctr.c:26