FFmpeg
vf_sab.c
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1 /*
2  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (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
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License along
17  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 /**
22  * @file
23  * Shape Adaptive Blur filter, ported from MPlayer libmpcodecs/vf_sab.c
24  */
25 
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 #include "libswscale/swscale.h"
29 
30 #include "avfilter.h"
31 #include "formats.h"
32 #include "internal.h"
33 
34 typedef struct FilterParam {
35  float radius;
37  float strength;
38  float quality;
40  uint8_t *pre_filter_buf;
44  int *dist_coeff;
45 #define COLOR_DIFF_COEFF_SIZE 512
47 } FilterParam;
48 
49 typedef struct SabContext {
50  const AVClass *class;
53  int hsub;
54  int vsub;
55  unsigned int sws_flags;
56 } SabContext;
57 
59 {
60  static const enum AVPixelFormat pix_fmts[] = {
67  };
69 }
70 
71 #define RADIUS_MIN 0.1
72 #define RADIUS_MAX 4.0
73 
74 #define PRE_FILTER_RADIUS_MIN 0.1
75 #define PRE_FILTER_RADIUS_MAX 2.0
76 
77 #define STRENGTH_MIN 0.1
78 #define STRENGTH_MAX 100.0
79 
80 #define OFFSET(x) offsetof(SabContext, x)
81 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
82 
83 static const AVOption sab_options[] = {
84  { "luma_radius", "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS },
85  { "lr" , "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS },
86  { "luma_pre_filter_radius", "set luma pre-filter radius", OFFSET(luma.pre_filter_radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, PRE_FILTER_RADIUS_MIN, PRE_FILTER_RADIUS_MAX, .flags=FLAGS },
87  { "lpfr", "set luma pre-filter radius", OFFSET(luma.pre_filter_radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, PRE_FILTER_RADIUS_MIN, PRE_FILTER_RADIUS_MAX, .flags=FLAGS },
88  { "luma_strength", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS },
89  { "ls", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS },
90 
91  { "chroma_radius", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS },
92  { "cr", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS },
93  { "chroma_pre_filter_radius", "set chroma pre-filter radius", OFFSET(chroma.pre_filter_radius), AV_OPT_TYPE_FLOAT, {.dbl=PRE_FILTER_RADIUS_MIN-1},
95  { "cpfr", "set chroma pre-filter radius", OFFSET(chroma.pre_filter_radius), AV_OPT_TYPE_FLOAT, {.dbl=PRE_FILTER_RADIUS_MIN-1},
97  { "chroma_strength", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS },
98  { "cs", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS },
99 
100  { NULL }
101 };
102 
104 
106 {
107  SabContext *s = ctx->priv;
108 
109  /* make chroma default to luma values, if not explicitly set */
110  if (s->chroma.radius < RADIUS_MIN)
111  s->chroma.radius = s->luma.radius;
112  if (s->chroma.pre_filter_radius < PRE_FILTER_RADIUS_MIN)
113  s->chroma.pre_filter_radius = s->luma.pre_filter_radius;
114  if (s->chroma.strength < STRENGTH_MIN)
115  s->chroma.strength = s->luma.strength;
116 
117  s->luma.quality = s->chroma.quality = 3.0;
118  s->sws_flags = SWS_POINT;
119 
121  "luma_radius:%f luma_pre_filter_radius::%f luma_strength:%f "
122  "chroma_radius:%f chroma_pre_filter_radius:%f chroma_strength:%f\n",
123  s->luma .radius, s->luma .pre_filter_radius, s->luma .strength,
124  s->chroma.radius, s->chroma.pre_filter_radius, s->chroma.strength);
125  return 0;
126 }
127 
129 {
130  if (f->pre_filter_context) {
131  sws_freeContext(f->pre_filter_context);
132  f->pre_filter_context = NULL;
133  }
134  av_freep(&f->pre_filter_buf);
135  av_freep(&f->dist_coeff);
136 }
137 
139 {
140  SabContext *s = ctx->priv;
141 
142  close_filter_param(&s->luma);
143  close_filter_param(&s->chroma);
144 }
145 
146 static int open_filter_param(FilterParam *f, int width, int height, unsigned int sws_flags)
147 {
148  SwsVector *vec;
149  SwsFilter sws_f;
150  int i, x, y;
151  int linesize = FFALIGN(width, 8);
152 
153  f->pre_filter_buf = av_malloc(linesize * height);
154  if (!f->pre_filter_buf)
155  return AVERROR(ENOMEM);
156 
157  f->pre_filter_linesize = linesize;
158  vec = sws_getGaussianVec(f->pre_filter_radius, f->quality);
159  sws_f.lumH = sws_f.lumV = vec;
160  sws_f.chrH = sws_f.chrV = NULL;
161  f->pre_filter_context = sws_getContext(width, height, AV_PIX_FMT_GRAY8,
163  sws_flags, &sws_f, NULL, NULL);
164  sws_freeVec(vec);
165 
166  vec = sws_getGaussianVec(f->strength, 5.0);
167  for (i = 0; i < COLOR_DIFF_COEFF_SIZE; i++) {
168  double d;
169  int index = i-COLOR_DIFF_COEFF_SIZE/2 + vec->length/2;
170 
171  if (index < 0 || index >= vec->length) d = 0.0;
172  else d = vec->coeff[index];
173 
174  f->color_diff_coeff[i] = (int)(d/vec->coeff[vec->length/2]*(1<<12) + 0.5);
175  }
176  sws_freeVec(vec);
177 
178  vec = sws_getGaussianVec(f->radius, f->quality);
179  f->dist_width = vec->length;
180  f->dist_linesize = FFALIGN(vec->length, 8);
181  f->dist_coeff = av_malloc_array(f->dist_width, f->dist_linesize * sizeof(*f->dist_coeff));
182  if (!f->dist_coeff) {
183  sws_freeVec(vec);
184  return AVERROR(ENOMEM);
185  }
186 
187  for (y = 0; y < vec->length; y++) {
188  for (x = 0; x < vec->length; x++) {
189  double d = vec->coeff[x] * vec->coeff[y];
190  f->dist_coeff[x + y*f->dist_linesize] = (int)(d*(1<<10) + 0.5);
191  }
192  }
193  sws_freeVec(vec);
194 
195  return 0;
196 }
197 
199 {
200  SabContext *s = inlink->dst->priv;
202  int ret;
203 
204  s->hsub = desc->log2_chroma_w;
205  s->vsub = desc->log2_chroma_h;
206 
207  close_filter_param(&s->luma);
208  ret = open_filter_param(&s->luma, inlink->w, inlink->h, s->sws_flags);
209  if (ret < 0)
210  return ret;
211 
212  close_filter_param(&s->chroma);
213  ret = open_filter_param(&s->chroma,
214  AV_CEIL_RSHIFT(inlink->w, s->hsub),
215  AV_CEIL_RSHIFT(inlink->h, s->vsub), s->sws_flags);
216  return ret;
217 }
218 
219 #define NB_PLANES 4
220 
221 static void blur(uint8_t *dst, const int dst_linesize,
222  const uint8_t *src, const int src_linesize,
223  const int w, const int h, FilterParam *fp)
224 {
225  int x, y;
226  FilterParam f = *fp;
227  const int radius = f.dist_width/2;
228 
229  const uint8_t * const src2[NB_PLANES] = { src };
230  int src2_linesize[NB_PLANES] = { src_linesize };
231  uint8_t *dst2[NB_PLANES] = { f.pre_filter_buf };
232  int dst2_linesize[NB_PLANES] = { f.pre_filter_linesize };
233 
234  sws_scale(f.pre_filter_context, src2, src2_linesize, 0, h, dst2, dst2_linesize);
235 
236 #define UPDATE_FACTOR do { \
237  int factor; \
238  factor = f.color_diff_coeff[COLOR_DIFF_COEFF_SIZE/2 + pre_val - \
239  f.pre_filter_buf[ix + iy*f.pre_filter_linesize]] * f.dist_coeff[dx + dy*f.dist_linesize]; \
240  sum += src[ix + iy*src_linesize] * factor; \
241  div += factor; \
242  } while (0)
243 
244  for (y = 0; y < h; y++) {
245  for (x = 0; x < w; x++) {
246  int sum = 0;
247  int div = 0;
248  int dy;
249  const int pre_val = f.pre_filter_buf[x + y*f.pre_filter_linesize];
250  if (x >= radius && x < w - radius) {
251  for (dy = 0; dy < radius*2 + 1; dy++) {
252  int dx;
253  int iy = y+dy - radius;
254  iy = avpriv_mirror(iy, h-1);
255 
256  for (dx = 0; dx < radius*2 + 1; dx++) {
257  const int ix = x+dx - radius;
259  }
260  }
261  } else {
262  for (dy = 0; dy < radius*2+1; dy++) {
263  int dx;
264  int iy = y+dy - radius;
265  iy = avpriv_mirror(iy, h-1);
266 
267  for (dx = 0; dx < radius*2 + 1; dx++) {
268  int ix = x+dx - radius;
269  ix = avpriv_mirror(ix, w-1);
271  }
272  }
273  }
274  dst[x + y*dst_linesize] = (sum + div/2) / div;
275  }
276  }
277 }
278 
280 {
281  SabContext *s = inlink->dst->priv;
282  AVFilterLink *outlink = inlink->dst->outputs[0];
283  AVFrame *outpic;
284 
285  outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h);
286  if (!outpic) {
288  return AVERROR(ENOMEM);
289  }
290  av_frame_copy_props(outpic, inpic);
291 
292  blur(outpic->data[0], outpic->linesize[0], inpic->data[0], inpic->linesize[0],
293  inlink->w, inlink->h, &s->luma);
294  if (inpic->data[2]) {
295  int cw = AV_CEIL_RSHIFT(inlink->w, s->hsub);
296  int ch = AV_CEIL_RSHIFT(inlink->h, s->vsub);
297  blur(outpic->data[1], outpic->linesize[1], inpic->data[1], inpic->linesize[1], cw, ch, &s->chroma);
298  blur(outpic->data[2], outpic->linesize[2], inpic->data[2], inpic->linesize[2], cw, ch, &s->chroma);
299  }
300 
302  return ff_filter_frame(outlink, outpic);
303 }
304 
305 static const AVFilterPad sab_inputs[] = {
306  {
307  .name = "default",
308  .type = AVMEDIA_TYPE_VIDEO,
309  .filter_frame = filter_frame,
310  .config_props = config_props,
311  },
312 };
313 
314 static const AVFilterPad sab_outputs[] = {
315  {
316  .name = "default",
317  .type = AVMEDIA_TYPE_VIDEO,
318  },
319 };
320 
322  .name = "sab",
323  .description = NULL_IF_CONFIG_SMALL("Apply shape adaptive blur."),
324  .priv_size = sizeof(SabContext),
325  .init = init,
326  .uninit = uninit,
330  .priv_class = &sab_class,
332 };
PRE_FILTER_RADIUS_MAX
#define PRE_FILTER_RADIUS_MAX
Definition: vf_sab.c:75
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
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
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
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1019
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2540
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_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:112
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
OFFSET
#define OFFSET(x)
Definition: vf_sab.c:80
pixdesc.h
index
fg index
Definition: ffmpeg_filter.c:168
w
uint8_t w
Definition: llviddspenc.c:38
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(sab)
AVOption
AVOption.
Definition: opt.h:247
chroma
static av_always_inline void chroma(WaveformContext *s, AVFrame *in, AVFrame *out, int component, int intensity, int offset_y, int offset_x, int column, int mirror, int jobnr, int nb_jobs)
Definition: vf_waveform.c:1634
blur
static void blur(uint8_t *dst, const int dst_linesize, const uint8_t *src, const int src_linesize, const int w, const int h, FilterParam *fp)
Definition: vf_sab.c:221
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
sab_options
static const AVOption sab_options[]
Definition: vf_sab.c:83
sws_scale
int attribute_align_arg sws_scale(struct SwsContext *c, const uint8_t *const srcSlice[], const int srcStride[], int srcSliceY, int srcSliceH, uint8_t *const dst[], const int dstStride[])
swscale wrapper, so we don't need to export the SwsContext.
Definition: swscale.c:1196
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:153
FilterParam::radius
float radius
Definition: vf_sab.c:35
PRE_FILTER_RADIUS_MIN
#define PRE_FILTER_RADIUS_MIN
Definition: vf_sab.c:74
sws_freeVec
void sws_freeVec(SwsVector *a)
Definition: utils.c:2312
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
formats.h
sab_outputs
static const AVFilterPad sab_outputs[]
Definition: vf_sab.c:314
SWS_POINT
#define SWS_POINT
Definition: swscale.h:63
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:50
SabContext::hsub
int hsub
Definition: vf_sab.c:53
av_cold
#define av_cold
Definition: attributes.h:90
COLOR_DIFF_COEFF_SIZE
#define COLOR_DIFF_COEFF_SIZE
Definition: vf_sab.c:45
width
#define width
RADIUS_MIN
#define RADIUS_MIN
Definition: vf_sab.c:71
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:51
SwsVector::length
int length
number of coefficients in the vector
Definition: swscale.h:112
ff_set_common_formats_from_list
int ff_set_common_formats_from_list(AVFilterContext *ctx, const int *fmts)
Equivalent to ff_set_common_formats(ctx, ff_make_format_list(fmts))
Definition: formats.c:703
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:290
ctx
AVFormatContext * ctx
Definition: movenc.c:48
sws_flags
static unsigned sws_flags
Definition: ffplay.c:110
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
sws_getGaussianVec
SwsVector * sws_getGaussianVec(double variance, double quality)
Return a normalized Gaussian curve used to filter stuff quality = 3 is high quality,...
Definition: utils.c:2139
f
#define f(width, name)
Definition: cbs_vp9.c:255
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:152
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
UPDATE_FACTOR
#define UPDATE_FACTOR
NULL
#define NULL
Definition: coverity.c:32
sab_inputs
static const AVFilterPad sab_inputs[]
Definition: vf_sab.c:305
av_frame_copy_props
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
Definition: frame.c:537
inpic
av_frame_free & inpic
Definition: vf_mcdeint.c:278
SabContext::vsub
int vsub
Definition: vf_sab.c:54
SabContext
Definition: vf_sab.c:49
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_sab.c:58
src
#define src
Definition: vp8dsp.c:255
FLAGS
#define FLAGS
Definition: vf_sab.c:81
close_filter_param
static void close_filter_param(FilterParam *f)
Definition: vf_sab.c:128
avpriv_mirror
static av_always_inline av_const int avpriv_mirror(int x, int w)
Definition: internal.h:275
SwsVector::coeff
double * coeff
pointer to the list of coefficients
Definition: swscale.h:111
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
fp
#define fp
Definition: regdef.h:44
SwsFilter::chrV
SwsVector * chrV
Definition: swscale.h:120
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
SwsVector
Definition: swscale.h:110
sws_getContext
struct SwsContext * sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
Allocate and return an SwsContext.
Definition: utils.c:2002
FilterParam::color_diff_coeff
int color_diff_coeff[COLOR_DIFF_COEFF_SIZE]
Definition: vf_sab.c:46
config_props
static int config_props(AVFilterLink *inlink)
Definition: vf_sab.c:198
SwsFilter
Definition: swscale.h:116
height
#define height
SwsFilter::lumV
SwsVector * lumV
Definition: swscale.h:118
FilterParam
Definition: boxblur.h:31
internal.h
AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
#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:130
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:227
i
int i
Definition: input.c:406
RADIUS_MAX
#define RADIUS_MAX
Definition: vf_sab.c:72
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
STRENGTH_MAX
#define STRENGTH_MAX
Definition: vf_sab.c:78
FilterParam::pre_filter_radius
float pre_filter_radius
Definition: vf_sab.c:36
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:56
ff_vf_sab
const AVFilter ff_vf_sab
Definition: vf_sab.c:321
SabContext::luma
FilterParam luma
Definition: vf_sab.c:51
AVFilter
Filter definition.
Definition: avfilter.h:149
ret
ret
Definition: filter_design.txt:187
FilterParam::pre_filter_context
struct SwsContext * pre_filter_context
Definition: vf_sab.c:39
open_filter_param
static int open_filter_param(FilterParam *f, int width, int height, unsigned int sws_flags)
Definition: vf_sab.c:146
FilterParam::quality
float quality
Definition: vf_sab.c:38
FilterParam::strength
float strength
Definition: vf_sab.c:37
sws_freeContext
void sws_freeContext(struct SwsContext *swsContext)
Free the swscaler context swsContext.
Definition: utils.c:2333
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
avfilter.h
SabContext::sws_flags
unsigned int sws_flags
Definition: vf_sab.c:55
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
AVFilterContext
An instance of a filter.
Definition: avfilter.h:346
desc
const char * desc
Definition: libsvtav1.c:79
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
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *inpic)
Definition: vf_sab.c:279
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
STRENGTH_MIN
#define STRENGTH_MIN
Definition: vf_sab.c:77
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:153
SwsFilter::lumH
SwsVector * lumH
Definition: swscale.h:117
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
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
d
d
Definition: ffmpeg_filter.c:156
NB_PLANES
#define NB_PLANES
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h
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