FFmpeg: libavfilter/vf_blurdetect.c Source File

FFmpeg
vf_blurdetect.c
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1 /*
2  * Copyright (c) 2021 Thilo Borgmann <thilo.borgmann _at_ mail.de>
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 /**
22  * @file
23  * No-reference blurdetect filter
24  *
25  * Implementing:
26  * Marziliano, Pina, et al. "A no-reference perceptual blur metric." Proceedings.
27  * International conference on image processing. Vol. 3. IEEE, 2002.
28  * https://infoscience.epfl.ch/record/111802/files/14%20A%20no-reference%20perceptual%20blur%20metric.pdf
29  *
30  * @author Thilo Borgmann <thilo.borgmann _at_ mail.de>
31  */
32 
33 #include "libavutil/imgutils.h"
34 #include "libavutil/opt.h"
35 #include "libavutil/qsort.h"
36 #include "internal.h"
37 #include "edge_common.h"
38 
39  static int comp(const float *a,const float *b)
40 {
41  return FFDIFFSIGN(*a, *b);
42 }
43 
44  typedef struct BLRContext {
45   const AVClass *class;
46 
47   int hsub, vsub;
48   int nb_planes;
49 
50   float low, high;
51   uint8_t low_u8, high_u8;
52   int radius; // radius during local maxima detection
53   int block_pct; // percentage of "sharpest" blocks in the image to use for bluriness calculation
54   int block_width; // width for block abbreviation
55   int block_height; // height for block abbreviation
56   int planes; // number of planes to filter
57 
58   double blur_total;
59   uint64_t nb_frames;
60 
61   float *blks;
62   uint8_t *filterbuf;
63   uint8_t *tmpbuf;
64   uint16_t *gradients;
65   int8_t *directions;
66 } BLRContext;
67 
68  #define OFFSET(x) offsetof(BLRContext, x)
69  #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
70  static const AVOption blurdetect_options[] = {
71  { "high", "set high threshold", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=30/255.}, 0, 1, FLAGS },
72  { "low", "set low threshold", OFFSET(low), AV_OPT_TYPE_FLOAT, {.dbl=15/255.}, 0, 1, FLAGS },
73  { "radius", "search radius for maxima detection", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=50}, 1, 100, FLAGS },
74  { "block_pct", "block pooling threshold when calculating blurriness", OFFSET(block_pct), AV_OPT_TYPE_INT, {.i64=80}, 1, 100, FLAGS },
75  { "block_width", "block size for block-based abbreviation of blurriness", OFFSET(block_width), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS },
76  { "block_height", "block size for block-based abbreviation of blurriness", OFFSET(block_height), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS },
77  { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 15, FLAGS },
78  { NULL }
79 };
80 
81 AVFILTER_DEFINE_CLASS(blurdetect);
82 
83  static av_cold int blurdetect_init(AVFilterContext *ctx)
84 {
85  BLRContext *s = ctx->priv;
86 
87  s->low_u8 = s->low * 255. + .5;
88  s->high_u8 = s->high * 255. + .5;
89 
90  return 0;
91 }
92 
93  static int blurdetect_config_input(AVFilterLink *inlink)
94 {
95  AVFilterContext *ctx = inlink->dst;
96  BLRContext *s = ctx->priv;
97  const int bufsize = inlink->w * inlink->h;
98  const AVPixFmtDescriptor *pix_desc;
99 
100  pix_desc = av_pix_fmt_desc_get(inlink->format);
101  s->hsub = pix_desc->log2_chroma_w;
102  s->vsub = pix_desc->log2_chroma_h;
103  s->nb_planes = av_pix_fmt_count_planes(inlink->format);
104 
105  if (s->block_width < 1 || s->block_height < 1) {
106  s->block_width = inlink->w;
107  s->block_height = inlink->h;
108  }
109 
110  s->tmpbuf = av_malloc(bufsize);
111  s->filterbuf = av_malloc(bufsize);
112  s->gradients = av_calloc(bufsize, sizeof(*s->gradients));
113  s->directions = av_malloc(bufsize);
114  s->blks = av_calloc((inlink->w / s->block_width) * (inlink->h / s->block_height),
115  sizeof(*s->blks));
116 
117  if (!s->tmpbuf || !s->filterbuf || !s->gradients || !s->directions || !s->blks)
118  return AVERROR(ENOMEM);
119 
120  return 0;
121 }
122 
123 // edge width is defined as the distance between surrounding maxima of the edge pixel
124  static float edge_width(BLRContext *blr, int i, int j, int8_t dir, int w, int h,
125  int edge, const uint8_t *src, int src_linesize)
126 {
127  float width = 0;
128  int dX, dY;
129  int sign;
130  int tmp;
131  int p1;
132  int p2;
133  int k, x, y;
134  int radius = blr->radius;
135 
136  switch(dir) {
137  case DIRECTION_HORIZONTAL: dX = 1; dY = 0; break;
138  case DIRECTION_VERTICAL: dX = 0; dY = 1; break;
139  case DIRECTION_45UP: dX = 1; dY = -1; break;
140  case DIRECTION_45DOWN: dX = 1; dY = 1; break;
141  default: dX = 1; dY = 1; break;
142  }
143 
144  // determines if search in direction dX/dY is looking for a maximum or minimum
145  sign = src[j * src_linesize + i] > src[(j - dY) * src_linesize + i - dX] ? 1 : -1;
146 
147  // search in -(dX/dY) direction
148  for (k = 0; k < radius; k++) {
149  x = i - k*dX;
150  y = j - k*dY;
151  p1 = y * src_linesize + x;
152  x -= dX;
153  y -= dY;
154  p2 = y * src_linesize + x;
155  if (x < 0 || x >= w || y < 0 || y >= h)
156  return 0;
157 
158  tmp = (src[p1] - src[p2]) * sign;
159 
160  if (tmp <= 0) // local maximum found
161  break;
162  }
163  width += k;
164 
165  // search in +(dX/dY) direction
166  for (k = 0; k < radius; k++) {
167  x = i + k * dX;
168  y = j + k * dY;
169  p1 = y * src_linesize + x;
170  x += dX;
171  y += dY;
172  p2 = y * src_linesize + x;
173  if (x < 0 || x >= w || y < 0 || y >= h)
174  return 0;
175 
176  tmp = (src[p1] - src[p2]) * sign;
177 
178  if (tmp >= 0) // local maximum found
179  break;
180  }
181  width += k;
182 
183  // for 45 degree directions approximate edge width in pixel units: 0.7 ~= sqrt(2)/2
184  if (dir == DIRECTION_45UP || dir == DIRECTION_45DOWN)
185  width *= 0.7;
186 
187  return width;
188 }
189 
190  static float calculate_blur(BLRContext *s, int w, int h, int hsub, int vsub,
191  int8_t* dir, int dir_linesize,
192  uint8_t* dst, int dst_linesize,
193  uint8_t* src, int src_linesize)
194 {
195  float total_width = 0.0;
196  int block_count;
197  double block_total_width;
198 
199  int i, j;
200  int blkcnt = 0;
201 
202  float *blks = s->blks;
203  float block_pool_threshold = s->block_pct / 100.0;
204 
205  int block_width = AV_CEIL_RSHIFT(s->block_width, hsub);
206  int block_height = AV_CEIL_RSHIFT(s->block_height, vsub);
207  int brows = h / block_height;
208  int bcols = w / block_width;
209 
210  for (int blkj = 0; blkj < brows; blkj++) {
211  for (int blki = 0; blki < bcols; blki++) {
212  block_total_width = 0.0;
213  block_count = 0;
214  for (int inj = 0; inj < block_height; inj++) {
215  for (int ini = 0; ini < block_width; ini++) {
216  i = blki * block_width + ini;
217  j = blkj * block_height + inj;
218 
219  if (dst[j * dst_linesize + i] > 0) {
220  float width = edge_width(s, i, j, dir[j*dir_linesize+i],
221  w, h, dst[j*dst_linesize+i],
222  src, src_linesize);
223  if (width > 0.001) { // throw away zeros
224  block_count++;
225  block_total_width += width;
226  }
227  }
228  }
229  }
230  // if not enough edge pixels in a block, consider it smooth
231  if (block_total_width >= 2 && block_count) {
232  blks[blkcnt] = block_total_width / block_count;
233  blkcnt++;
234  }
235  }
236  }
237 
238  // simple block pooling by sorting and keeping the sharper blocks
239  AV_QSORT(blks, blkcnt, float, comp);
240  blkcnt = ceil(blkcnt * block_pool_threshold);
241  for (int i = 0; i < blkcnt; i++) {
242  total_width += blks[i];
243  }
244 
245  return total_width / blkcnt;
246 }
247 
248  static void set_meta(AVDictionary **metadata, const char *key, float d)
249 {
250  char value[128];
251  snprintf(value, sizeof(value), "%f", d);
252  av_dict_set(metadata, key, value, 0);
253 }
254 
255  static int blurdetect_filter_frame(AVFilterLink *inlink, AVFrame *in)
256 {
257  AVFilterContext *ctx = inlink->dst;
258  BLRContext *s = ctx->priv;
259  AVFilterLink *outlink = ctx->outputs[0];
260 
261  const int inw = inlink->w;
262  const int inh = inlink->h;
263 
264  uint8_t *tmpbuf = s->tmpbuf;
265  uint8_t *filterbuf = s->filterbuf;
266  uint16_t *gradients = s->gradients;
267  int8_t *directions = s->directions;
268 
269  float blur = 0.0f;
270  int nplanes = 0;
271  AVDictionary **metadata;
272  metadata = &in->metadata;
273 
274  for (int plane = 0; plane < s->nb_planes; plane++) {
275  int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
276  int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
277  int w = AV_CEIL_RSHIFT(inw, hsub);
278  int h = AV_CEIL_RSHIFT(inh, vsub);
279 
280  if (!((1 << plane) & s->planes))
281  continue;
282 
283  nplanes++;
284 
285  // gaussian filter to reduce noise
286  ff_gaussian_blur(w, h,
287  filterbuf, w,
288  in->data[plane], in->linesize[plane]);
289 
290  // compute the 16-bits gradients and directions for the next step
291  ff_sobel(w, h, gradients, w, directions, w, filterbuf, w);
292 
293  // non_maximum_suppression() will actually keep & clip what's necessary and
294  // ignore the rest, so we need a clean output buffer
295  memset(tmpbuf, 0, inw * inh);
296  ff_non_maximum_suppression(w, h, tmpbuf, w, directions, w, gradients, w);
297 
298 
299  // keep high values, or low values surrounded by high values
300  ff_double_threshold(s->low_u8, s->high_u8, w, h,
301  tmpbuf, w, tmpbuf, w);
302 
303  blur += calculate_blur(s, w, h, hsub, vsub, directions, w,
304  tmpbuf, w, filterbuf, w);
305  }
306 
307  if (nplanes)
308  blur /= nplanes;
309 
310  s->blur_total += blur;
311 
312  // write stats
313  av_log(ctx, AV_LOG_VERBOSE, "blur: %.7f\n", blur);
314 
315  set_meta(metadata, "lavfi.blur", blur);
316 
317  s->nb_frames = inlink->frame_count_in;
318 
319  return ff_filter_frame(outlink, in);
320 }
321 
322  static av_cold void blurdetect_uninit(AVFilterContext *ctx)
323 {
324  BLRContext *s = ctx->priv;
325 
326  if (s->nb_frames > 0) {
327  av_log(ctx, AV_LOG_INFO, "blur mean: %.7f\n",
328  s->blur_total / s->nb_frames);
329  }
330 
331  av_freep(&s->tmpbuf);
332  av_freep(&s->filterbuf);
333  av_freep(&s->gradients);
334  av_freep(&s->directions);
335  av_freep(&s->blks);
336 }
337 
338  static const enum AVPixelFormat pix_fmts[] = {
339  AV_PIX_FMT_GRAY8,
340  AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP,
341  AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
342  AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
343  AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
344  AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P,
345  AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
346  AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA420P,
347  AV_PIX_FMT_NONE
348 };
349 
350  static const AVFilterPad blurdetect_inputs[] = {
351  {
352  .name = "default",
353  .type = AVMEDIA_TYPE_VIDEO,
354  .config_props = blurdetect_config_input,
355  .filter_frame = blurdetect_filter_frame,
356  },
357 };
358 
359  static const AVFilterPad blurdetect_outputs[] = {
360  {
361  .name = "default",
362  .type = AVMEDIA_TYPE_VIDEO,
363  },
364 };
365 
366  const AVFilter ff_vf_blurdetect = {
367  .name = "blurdetect",
368  .description = NULL_IF_CONFIG_SMALL("Blurdetect filter."),
369  .priv_size = sizeof(BLRContext),
370  .init = blurdetect_init,
371  .uninit = blurdetect_uninit,
372  FILTER_PIXFMTS_ARRAY(pix_fmts),
373  FILTER_INPUTS(blurdetect_inputs),
374  FILTER_OUTPUTS(blurdetect_outputs),
375  .priv_class = &blurdetect_class,
376  .flags = AVFILTER_FLAG_METADATA_ONLY,
377 };
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
BLRContext::hsub
int hsub
Definition: vf_blurdetect.c:47
BLRContext::gradients
uint16_t * gradients
Definition: vf_blurdetect.c:64
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:999
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2662
BLRContext::high_u8
uint8_t high_u8
Definition: vf_blurdetect.c:51
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:170
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
ff_gaussian_blur
void ff_gaussian_blur(int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)
Applies gaussian blur.
Definition: edge_common.c:142
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:325
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
BLRContext::vsub
int vsub
Definition: vf_blurdetect.c:47
w
uint8_t w
Definition: llviddspenc.c:38
edge_common.h
calculate_blur
static float calculate_blur(BLRContext *s, int w, int h, int hsub, int vsub, int8_t *dir, int dir_linesize, uint8_t *dst, int dst_linesize, uint8_t *src, int src_linesize)
Definition: vf_blurdetect.c:190
AVOption
AVOption.
Definition: opt.h:251
b
#define b
Definition: input.c:34
blurdetect_init
static av_cold int blurdetect_init(AVFilterContext *ctx)
Definition: vf_blurdetect.c:83
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
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
ff_sobel
void ff_sobel(int w, int h, uint16_t *dst, int dst_linesize, int8_t *dir, int dir_linesize, const uint8_t *src, int src_linesize)
Simple sobel operator to get rounded gradients.
Definition: edge_common.c:50
AVDictionary
Definition: dict.c:30
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:175
BLRContext::block_height
int block_height
Definition: vf_blurdetect.c:55
DIRECTION_VERTICAL
@ DIRECTION_VERTICAL
Definition: edge_common.h:36
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_blurdetect.c:338
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:346
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
hsub
static void hsub(htype *dst, const htype *src, int bins)
Definition: vf_median.c:74
init
static int init
Definition: av_tx.c:47
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2702
BLRContext::low
float low
Definition: vf_blurdetect.c:50
BLRContext::planes
int planes
Definition: vf_blurdetect.c:56
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:205
FLAGS
#define FLAGS
Definition: vf_blurdetect.c:69
set_meta
static void set_meta(AVDictionary **metadata, const char *key, float d)
Definition: vf_blurdetect.c:248
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:49
FFDIFFSIGN
#define FFDIFFSIGN(x, y)
Comparator.
Definition: macros.h:45
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
ceil
static __device__ float ceil(float a)
Definition: cuda_runtime.h:176
av_cold
#define av_cold
Definition: attributes.h:90
BLRContext::tmpbuf
uint8_t * tmpbuf
Definition: vf_blurdetect.c:63
BLRContext
Definition: vf_blurdetect.c:44
DIRECTION_45DOWN
@ DIRECTION_45DOWN
Definition: edge_common.h:34
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
width
#define width
s
#define s(width, name)
Definition: cbs_vp9.c:256
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_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:50
BLRContext::block_width
int block_width
Definition: vf_blurdetect.c:54
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AVPixFmtDescriptor::log2_chroma_w
uint8_t log2_chroma_w
Amount to shift the luma width right to find the chroma width.
Definition: pixdesc.h:80
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
key
const char * key
Definition: hwcontext_opencl.c:174
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:190
comp
static int comp(const float *a, const float *b)
Definition: vf_blurdetect.c:39
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
BLRContext::radius
int radius
Definition: vf_blurdetect.c:52
OFFSET
#define OFFSET(x)
Definition: vf_blurdetect.c:68
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
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
DIRECTION_HORIZONTAL
@ DIRECTION_HORIZONTAL
Definition: edge_common.h:35
ff_non_maximum_suppression
void ff_non_maximum_suppression(int w, int h, uint8_t *dst, int dst_linesize, const int8_t *dir, int dir_linesize, const uint16_t *src, int src_linesize)
Filters rounded gradients to drop all non-maxima pixels in the magnitude image Expects gradients gene...
Definition: edge_common.c:80
blurdetect_uninit
static av_cold void blurdetect_uninit(AVFilterContext *ctx)
Definition: vf_blurdetect.c:322
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:74
planes
static const struct @328 planes[]
qsort.h
blur
static void blur(uint8_t *dst, int dst_step, const uint8_t *src, int src_step, int len, int radius, int pixsize)
Definition: vf_boxblur.c:160
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
ff_double_threshold
void ff_double_threshold(int low, int high, int w, int h, uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize)
Filters all pixels in src to keep all pixels > high, and keep all pixels > low where all surrounding ...
Definition: edge_common.c:109
BLRContext::blks
float * blks
Definition: vf_blurdetect.c:61
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
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
BLRContext::low_u8
uint8_t low_u8
Definition: vf_blurdetect.c:51
BLRContext::nb_planes
int nb_planes
Definition: vf_blurdetect.c:48
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
internal.h
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
BLRContext::blur_total
double blur_total
Definition: vf_blurdetect.c:58
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
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
BLRContext::nb_frames
uint64_t nb_frames
Definition: vf_blurdetect.c:59
value
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 value
Definition: writing_filters.txt:86
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:55
blurdetect_options
static const AVOption blurdetect_options[]
Definition: vf_blurdetect.c:70
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:272
edge_width
static float edge_width(BLRContext *blr, int i, int j, int8_t dir, int w, int h, int edge, const uint8_t *src, int src_linesize)
Definition: vf_blurdetect.c:124
AVFilter
Filter definition.
Definition: avfilter.h:171
BLRContext::block_pct
int block_pct
Definition: vf_blurdetect.c:53
blurdetect_inputs
static const AVFilterPad blurdetect_inputs[]
Definition: vf_blurdetect.c:350
blurdetect_filter_frame
static int blurdetect_filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_blurdetect.c:255
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(blurdetect)
BLRContext::high
float high
Definition: vf_blurdetect.c:50
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
AVFrame::metadata
AVDictionary * metadata
metadata.
Definition: frame.h:620
BLRContext::filterbuf
uint8_t * filterbuf
Definition: vf_blurdetect.c:62
AVFILTER_FLAG_METADATA_ONLY
#define AVFILTER_FLAG_METADATA_ONLY
The filter is a "metadata" filter - it does not modify the frame data in any way.
Definition: avfilter.h:143
BLRContext::directions
int8_t * directions
Definition: vf_blurdetect.c:65
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:408
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:158
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
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
DIRECTION_45UP
@ DIRECTION_45UP
Definition: edge_common.h:33
blurdetect_outputs
static const AVFilterPad blurdetect_outputs[]
Definition: vf_blurdetect.c:359
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:191
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
av_dict_set
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
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
blurdetect_config_input
static int blurdetect_config_input(AVFilterLink *inlink)
Definition: vf_blurdetect.c:93
d
d
Definition: ffmpeg_filter.c:153
imgutils.h
ff_vf_blurdetect
const AVFilter ff_vf_blurdetect
Definition: vf_blurdetect.c:366
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:370
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:27
uninit
static av_cold int uninit(AVCodecContext *avctx)
Definition: crystalhd.c:285
h
h
Definition: vp9dsp_template.c:2038
snprintf
#define snprintf
Definition: snprintf.h:34
AVPixFmtDescriptor::log2_chroma_h
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:89
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
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