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 
58 static const enum AVPixelFormat pix_fmts[] = {
65 };
66 
67 #define RADIUS_MIN 0.1
68 #define RADIUS_MAX 4.0
69 
70 #define PRE_FILTER_RADIUS_MIN 0.1
71 #define PRE_FILTER_RADIUS_MAX 2.0
72 
73 #define STRENGTH_MIN 0.1
74 #define STRENGTH_MAX 100.0
75 
76 #define OFFSET(x) offsetof(SabContext, x)
77 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
78 
79 static const AVOption sab_options[] = {
80  { "luma_radius", "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS },
81  { "lr" , "set luma radius", OFFSET(luma.radius), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, RADIUS_MIN, RADIUS_MAX, .flags=FLAGS },
82  { "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 },
83  { "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 },
84  { "luma_strength", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS },
85  { "ls", "set luma strength", OFFSET(luma.strength), AV_OPT_TYPE_FLOAT, {.dbl=1.0}, STRENGTH_MIN, STRENGTH_MAX, .flags=FLAGS },
86 
87  { "chroma_radius", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS },
88  { "cr", "set chroma radius", OFFSET(chroma.radius), AV_OPT_TYPE_FLOAT, {.dbl=RADIUS_MIN-1}, RADIUS_MIN-1, RADIUS_MAX, .flags=FLAGS },
89  { "chroma_pre_filter_radius", "set chroma pre-filter radius", OFFSET(chroma.pre_filter_radius), AV_OPT_TYPE_FLOAT, {.dbl=PRE_FILTER_RADIUS_MIN-1},
91  { "cpfr", "set chroma pre-filter radius", OFFSET(chroma.pre_filter_radius), AV_OPT_TYPE_FLOAT, {.dbl=PRE_FILTER_RADIUS_MIN-1},
93  { "chroma_strength", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS },
94  { "cs", "set chroma strength", OFFSET(chroma.strength), AV_OPT_TYPE_FLOAT, {.dbl=STRENGTH_MIN-1}, STRENGTH_MIN-1, STRENGTH_MAX, .flags=FLAGS },
95 
96  { NULL }
97 };
98 
100 
102 {
103  SabContext *s = ctx->priv;
104 
105  /* make chroma default to luma values, if not explicitly set */
106  if (s->chroma.radius < RADIUS_MIN)
107  s->chroma.radius = s->luma.radius;
108  if (s->chroma.pre_filter_radius < PRE_FILTER_RADIUS_MIN)
109  s->chroma.pre_filter_radius = s->luma.pre_filter_radius;
110  if (s->chroma.strength < STRENGTH_MIN)
111  s->chroma.strength = s->luma.strength;
112 
113  s->luma.quality = s->chroma.quality = 3.0;
114  s->sws_flags = SWS_POINT;
115 
117  "luma_radius:%f luma_pre_filter_radius::%f luma_strength:%f "
118  "chroma_radius:%f chroma_pre_filter_radius:%f chroma_strength:%f\n",
119  s->luma .radius, s->luma .pre_filter_radius, s->luma .strength,
120  s->chroma.radius, s->chroma.pre_filter_radius, s->chroma.strength);
121  return 0;
122 }
123 
125 {
126  if (f->pre_filter_context) {
127  sws_freeContext(f->pre_filter_context);
128  f->pre_filter_context = NULL;
129  }
130  av_freep(&f->pre_filter_buf);
131  av_freep(&f->dist_coeff);
132 }
133 
135 {
136  SabContext *s = ctx->priv;
137 
138  close_filter_param(&s->luma);
139  close_filter_param(&s->chroma);
140 }
141 
142 static int open_filter_param(FilterParam *f, int width, int height, unsigned int sws_flags)
143 {
144  SwsVector *vec;
145  SwsFilter sws_f;
146  int i, x, y;
147  int linesize = FFALIGN(width, 8);
148 
149  f->pre_filter_buf = av_malloc(linesize * height);
150  if (!f->pre_filter_buf)
151  return AVERROR(ENOMEM);
152 
153  f->pre_filter_linesize = linesize;
154  vec = sws_getGaussianVec(f->pre_filter_radius, f->quality);
155  sws_f.lumH = sws_f.lumV = vec;
156  sws_f.chrH = sws_f.chrV = NULL;
157  f->pre_filter_context = sws_getContext(width, height, AV_PIX_FMT_GRAY8,
159  sws_flags, &sws_f, NULL, NULL);
160  sws_freeVec(vec);
161 
162  vec = sws_getGaussianVec(f->strength, 5.0);
163  for (i = 0; i < COLOR_DIFF_COEFF_SIZE; i++) {
164  double d;
165  int index = i-COLOR_DIFF_COEFF_SIZE/2 + vec->length/2;
166 
167  if (index < 0 || index >= vec->length) d = 0.0;
168  else d = vec->coeff[index];
169 
170  f->color_diff_coeff[i] = (int)(d/vec->coeff[vec->length/2]*(1<<12) + 0.5);
171  }
172  sws_freeVec(vec);
173 
174  vec = sws_getGaussianVec(f->radius, f->quality);
175  f->dist_width = vec->length;
176  f->dist_linesize = FFALIGN(vec->length, 8);
177  f->dist_coeff = av_malloc_array(f->dist_width, f->dist_linesize * sizeof(*f->dist_coeff));
178  if (!f->dist_coeff) {
179  sws_freeVec(vec);
180  return AVERROR(ENOMEM);
181  }
182 
183  for (y = 0; y < vec->length; y++) {
184  for (x = 0; x < vec->length; x++) {
185  double d = vec->coeff[x] * vec->coeff[y];
186  f->dist_coeff[x + y*f->dist_linesize] = (int)(d*(1<<10) + 0.5);
187  }
188  }
189  sws_freeVec(vec);
190 
191  return 0;
192 }
193 
195 {
196  SabContext *s = inlink->dst->priv;
198  int ret;
199 
200  s->hsub = desc->log2_chroma_w;
201  s->vsub = desc->log2_chroma_h;
202 
203  close_filter_param(&s->luma);
204  ret = open_filter_param(&s->luma, inlink->w, inlink->h, s->sws_flags);
205  if (ret < 0)
206  return ret;
207 
208  close_filter_param(&s->chroma);
209  ret = open_filter_param(&s->chroma,
210  AV_CEIL_RSHIFT(inlink->w, s->hsub),
211  AV_CEIL_RSHIFT(inlink->h, s->vsub), s->sws_flags);
212  return ret;
213 }
214 
215 #define NB_PLANES 4
216 
217 static void blur(uint8_t *dst, const int dst_linesize,
218  const uint8_t *src, const int src_linesize,
219  const int w, const int h, FilterParam *fp)
220 {
221  int x, y;
222  FilterParam f = *fp;
223  const int radius = f.dist_width/2;
224 
225  const uint8_t * const src2[NB_PLANES] = { src };
226  int src2_linesize[NB_PLANES] = { src_linesize };
227  uint8_t *dst2[NB_PLANES] = { f.pre_filter_buf };
228  int dst2_linesize[NB_PLANES] = { f.pre_filter_linesize };
229 
230  sws_scale(f.pre_filter_context, src2, src2_linesize, 0, h, dst2, dst2_linesize);
231 
232 #define UPDATE_FACTOR do { \
233  int factor; \
234  factor = f.color_diff_coeff[COLOR_DIFF_COEFF_SIZE/2 + pre_val - \
235  f.pre_filter_buf[ix + iy*f.pre_filter_linesize]] * f.dist_coeff[dx + dy*f.dist_linesize]; \
236  sum += src[ix + iy*src_linesize] * factor; \
237  div += factor; \
238  } while (0)
239 
240  for (y = 0; y < h; y++) {
241  for (x = 0; x < w; x++) {
242  int sum = 0;
243  int div = 0;
244  int dy;
245  const int pre_val = f.pre_filter_buf[x + y*f.pre_filter_linesize];
246  if (x >= radius && x < w - radius) {
247  for (dy = 0; dy < radius*2 + 1; dy++) {
248  int dx;
249  int iy = y+dy - radius;
250  iy = avpriv_mirror(iy, h-1);
251 
252  for (dx = 0; dx < radius*2 + 1; dx++) {
253  const int ix = x+dx - radius;
255  }
256  }
257  } else {
258  for (dy = 0; dy < radius*2+1; dy++) {
259  int dx;
260  int iy = y+dy - radius;
261  iy = avpriv_mirror(iy, h-1);
262 
263  for (dx = 0; dx < radius*2 + 1; dx++) {
264  int ix = x+dx - radius;
265  ix = avpriv_mirror(ix, w-1);
267  }
268  }
269  }
270  dst[x + y*dst_linesize] = (sum + div/2) / div;
271  }
272  }
273 }
274 
276 {
277  SabContext *s = inlink->dst->priv;
278  AVFilterLink *outlink = inlink->dst->outputs[0];
279  AVFrame *outpic;
280 
281  outpic = ff_get_video_buffer(outlink, outlink->w, outlink->h);
282  if (!outpic) {
284  return AVERROR(ENOMEM);
285  }
286  av_frame_copy_props(outpic, inpic);
287 
288  blur(outpic->data[0], outpic->linesize[0], inpic->data[0], inpic->linesize[0],
289  inlink->w, inlink->h, &s->luma);
290  if (inpic->data[2]) {
291  int cw = AV_CEIL_RSHIFT(inlink->w, s->hsub);
292  int ch = AV_CEIL_RSHIFT(inlink->h, s->vsub);
293  blur(outpic->data[1], outpic->linesize[1], inpic->data[1], inpic->linesize[1], cw, ch, &s->chroma);
294  blur(outpic->data[2], outpic->linesize[2], inpic->data[2], inpic->linesize[2], cw, ch, &s->chroma);
295  }
296 
298  return ff_filter_frame(outlink, outpic);
299 }
300 
301 static const AVFilterPad sab_inputs[] = {
302  {
303  .name = "default",
304  .type = AVMEDIA_TYPE_VIDEO,
305  .filter_frame = filter_frame,
306  .config_props = config_props,
307  },
308 };
309 
310 static const AVFilterPad sab_outputs[] = {
311  {
312  .name = "default",
313  .type = AVMEDIA_TYPE_VIDEO,
314  },
315 };
316 
318  .name = "sab",
319  .description = NULL_IF_CONFIG_SMALL("Apply shape adaptive blur."),
320  .priv_size = sizeof(SabContext),
321  .init = init,
322  .uninit = uninit,
326  .priv_class = &sab_class,
328 };
PRE_FILTER_RADIUS_MAX
#define PRE_FILTER_RADIUS_MAX
Definition: vf_sab.c:71
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
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_sab.c:58
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
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_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:76
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:217
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
sab_options
static const AVOption sab_options[]
Definition: vf_sab.c:79
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:1204
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:70
sws_freeVec
void sws_freeVec(SwsVector *a)
Definition: utils.c:2313
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:310
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:67
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
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:2140
f
#define f(width, name)
Definition: cbs_vp9.c:255
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:191
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:301
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:270
SabContext::vsub
int vsub
Definition: vf_sab.c:54
SabContext
Definition: vf_sab.c:49
src
#define src
Definition: vp8dsp.c:255
FLAGS
#define FLAGS
Definition: vf_sab.c:77
close_filter_param
static void close_filter_param(FilterParam *f)
Definition: vf_sab.c:124
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:2003
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:194
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
RADIUS_MAX
#define RADIUS_MAX
Definition: vf_sab.c:68
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
STRENGTH_MAX
#define STRENGTH_MAX
Definition: vf_sab.c:74
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:317
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:142
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:2334
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:386
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:275
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:73
FFALIGN
#define FFALIGN(x, a)
Definition: macros.h:78
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:192
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
Definition: vf_sab.c:215
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
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Definition: tableprint_vlc.h:28
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Definition: vf_sab.c:44
h
h
Definition: vp9dsp_template.c:2038
FilterParam::pre_filter_buf
uint8_t * pre_filter_buf
Definition: vf_sab.c:40
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_sab.c:101
int
int
Definition: ffmpeg_filter.c:156
SwsContext
Definition: swscale_internal.h:300
FilterParam::pre_filter_linesize
int pre_filter_linesize
Definition: vf_sab.c:41
FilterParam::dist_linesize
int dist_linesize
Definition: vf_sab.c:43
SwsFilter::chrH
SwsVector * chrH
Definition: swscale.h:119
SabContext::chroma
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Definition: vf_sab.c:52
swscale.h
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Definition: vf_sab.c:134
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Definition: vf_sab.c:42