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 #include "video.h"
39 
40 static int comp(const float *a,const float *b)
41 {
42  return FFDIFFSIGN(*a, *b);
43 }
44 
45 typedef struct BLRContext {
46  const AVClass *class;
47 
48  int hsub, vsub;
49  int nb_planes;
50 
51  float low, high;
52  uint8_t low_u8, high_u8;
53  int radius; // radius during local maxima detection
54  int block_pct; // percentage of "sharpest" blocks in the image to use for bluriness calculation
55  int block_width; // width for block abbreviation
56  int block_height; // height for block abbreviation
57  int planes; // number of planes to filter
58 
59  double blur_total;
60  uint64_t nb_frames;
61 
62  float *blks;
63  uint8_t *filterbuf;
64  uint8_t *tmpbuf;
65  uint16_t *gradients;
66  int8_t *directions;
67 } BLRContext;
68 
69 #define OFFSET(x) offsetof(BLRContext, x)
70 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
71 static const AVOption blurdetect_options[] = {
72  { "high", "set high threshold", OFFSET(high), AV_OPT_TYPE_FLOAT, {.dbl=30/255.}, 0, 1, FLAGS },
73  { "low", "set low threshold", OFFSET(low), AV_OPT_TYPE_FLOAT, {.dbl=15/255.}, 0, 1, FLAGS },
74  { "radius", "search radius for maxima detection", OFFSET(radius), AV_OPT_TYPE_INT, {.i64=50}, 1, 100, FLAGS },
75  { "block_pct", "block pooling threshold when calculating blurriness", OFFSET(block_pct), AV_OPT_TYPE_INT, {.i64=80}, 1, 100, FLAGS },
76  { "block_width", "block size for block-based abbreviation of blurriness", OFFSET(block_width), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS },
77  { "block_height", "block size for block-based abbreviation of blurriness", OFFSET(block_height), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS },
78  { "planes", "set planes to filter", OFFSET(planes), AV_OPT_TYPE_INT, {.i64=1}, 0, 15, FLAGS },
79  { NULL }
80 };
81 
82 AVFILTER_DEFINE_CLASS(blurdetect);
83 
85 {
86  BLRContext *s = ctx->priv;
87 
88  s->low_u8 = s->low * 255. + .5;
89  s->high_u8 = s->high * 255. + .5;
90 
91  return 0;
92 }
93 
95 {
96  AVFilterContext *ctx = inlink->dst;
97  BLRContext *s = ctx->priv;
98  const int bufsize = inlink->w * inlink->h;
99  const AVPixFmtDescriptor *pix_desc;
100 
101  pix_desc = av_pix_fmt_desc_get(inlink->format);
102  s->hsub = pix_desc->log2_chroma_w;
103  s->vsub = pix_desc->log2_chroma_h;
104  s->nb_planes = av_pix_fmt_count_planes(inlink->format);
105 
106  if (s->block_width < 1 || s->block_height < 1) {
107  s->block_width = inlink->w;
108  s->block_height = inlink->h;
109  }
110 
111  s->tmpbuf = av_malloc(bufsize);
112  s->filterbuf = av_malloc(bufsize);
113  s->gradients = av_calloc(bufsize, sizeof(*s->gradients));
114  s->directions = av_malloc(bufsize);
115  s->blks = av_calloc((inlink->w / s->block_width) * (inlink->h / s->block_height),
116  sizeof(*s->blks));
117 
118  if (!s->tmpbuf || !s->filterbuf || !s->gradients || !s->directions || !s->blks)
119  return AVERROR(ENOMEM);
120 
121  return 0;
122 }
123 
124 // edge width is defined as the distance between surrounding maxima of the edge pixel
125 static float edge_width(BLRContext *blr, int i, int j, int8_t dir, int w, int h,
126  int edge, const uint8_t *src, int src_linesize)
127 {
128  float width = 0;
129  int dX, dY;
130  int sign;
131  int tmp;
132  int p1;
133  int p2;
134  int k, x, y;
135  int radius = blr->radius;
136 
137  switch(dir) {
138  case DIRECTION_HORIZONTAL: dX = 1; dY = 0; break;
139  case DIRECTION_VERTICAL: dX = 0; dY = 1; break;
140  case DIRECTION_45UP: dX = 1; dY = -1; break;
141  case DIRECTION_45DOWN: dX = 1; dY = 1; break;
142  default: dX = 1; dY = 1; break;
143  }
144 
145  // determines if search in direction dX/dY is looking for a maximum or minimum
146  sign = src[j * src_linesize + i] > src[(j - dY) * src_linesize + i - dX] ? 1 : -1;
147 
148  // search in -(dX/dY) direction
149  for (k = 0; k < radius; k++) {
150  x = i - k*dX;
151  y = j - k*dY;
152  p1 = y * src_linesize + x;
153  x -= dX;
154  y -= dY;
155  p2 = y * src_linesize + x;
156  if (x < 0 || x >= w || y < 0 || y >= h)
157  return 0;
158 
159  tmp = (src[p1] - src[p2]) * sign;
160 
161  if (tmp <= 0) // local maximum found
162  break;
163  }
164  width += k;
165 
166  // search in +(dX/dY) direction
167  for (k = 0; k < radius; k++) {
168  x = i + k * dX;
169  y = j + k * dY;
170  p1 = y * src_linesize + x;
171  x += dX;
172  y += dY;
173  p2 = y * src_linesize + x;
174  if (x < 0 || x >= w || y < 0 || y >= h)
175  return 0;
176 
177  tmp = (src[p1] - src[p2]) * sign;
178 
179  if (tmp >= 0) // local maximum found
180  break;
181  }
182  width += k;
183 
184  // for 45 degree directions approximate edge width in pixel units: 0.7 ~= sqrt(2)/2
185  if (dir == DIRECTION_45UP || dir == DIRECTION_45DOWN)
186  width *= 0.7;
187 
188  return width;
189 }
190 
191 static float calculate_blur(BLRContext *s, int w, int h, int hsub, int vsub,
192  int8_t* dir, int dir_linesize,
193  uint8_t* dst, int dst_linesize,
194  uint8_t* src, int src_linesize)
195 {
196  float total_width = 0.0;
197  int block_count;
198  double block_total_width;
199 
200  int i, j;
201  int blkcnt = 0;
202 
203  float *blks = s->blks;
204  float block_pool_threshold = s->block_pct / 100.0;
205 
206  int block_width = AV_CEIL_RSHIFT(s->block_width, hsub);
207  int block_height = AV_CEIL_RSHIFT(s->block_height, vsub);
208  int brows = h / block_height;
209  int bcols = w / block_width;
210 
211  for (int blkj = 0; blkj < brows; blkj++) {
212  for (int blki = 0; blki < bcols; blki++) {
213  block_total_width = 0.0;
214  block_count = 0;
215  for (int inj = 0; inj < block_height; inj++) {
216  for (int ini = 0; ini < block_width; ini++) {
217  i = blki * block_width + ini;
218  j = blkj * block_height + inj;
219 
220  if (dst[j * dst_linesize + i] > 0) {
221  float width = edge_width(s, i, j, dir[j*dir_linesize+i],
222  w, h, dst[j*dst_linesize+i],
223  src, src_linesize);
224  if (width > 0.001) { // throw away zeros
225  block_count++;
226  block_total_width += width;
227  }
228  }
229  }
230  }
231  // if not enough edge pixels in a block, consider it smooth
232  if (block_total_width >= 2 && block_count) {
233  blks[blkcnt] = block_total_width / block_count;
234  blkcnt++;
235  }
236  }
237  }
238 
239  // simple block pooling by sorting and keeping the sharper blocks
240  AV_QSORT(blks, blkcnt, float, comp);
241  blkcnt = ceil(blkcnt * block_pool_threshold);
242  for (int i = 0; i < blkcnt; i++) {
243  total_width += blks[i];
244  }
245 
246  return total_width / blkcnt;
247 }
248 
249 static void set_meta(AVDictionary **metadata, const char *key, float d)
250 {
251  char value[128];
252  snprintf(value, sizeof(value), "%f", d);
253  av_dict_set(metadata, key, value, 0);
254 }
255 
257 {
258  AVFilterContext *ctx = inlink->dst;
259  BLRContext *s = ctx->priv;
260  AVFilterLink *outlink = ctx->outputs[0];
261 
262  const int inw = inlink->w;
263  const int inh = inlink->h;
264 
265  uint8_t *tmpbuf = s->tmpbuf;
266  uint8_t *filterbuf = s->filterbuf;
267  uint16_t *gradients = s->gradients;
268  int8_t *directions = s->directions;
269 
270  float blur = 0.0f;
271  int nplanes = 0;
272  AVDictionary **metadata;
273  metadata = &in->metadata;
274 
275  for (int plane = 0; plane < s->nb_planes; plane++) {
276  int hsub = plane == 1 || plane == 2 ? s->hsub : 0;
277  int vsub = plane == 1 || plane == 2 ? s->vsub : 0;
278  int w = AV_CEIL_RSHIFT(inw, hsub);
279  int h = AV_CEIL_RSHIFT(inh, vsub);
280 
281  if (!((1 << plane) & s->planes))
282  continue;
283 
284  nplanes++;
285 
286  // gaussian filter to reduce noise
287  ff_gaussian_blur_8(w, h,
288  filterbuf, w,
289  in->data[plane], in->linesize[plane], 1);
290 
291  // compute the 16-bits gradients and directions for the next step
292  ff_sobel_8(w, h, gradients, w, directions, w, filterbuf, w, 1);
293 
294  // non_maximum_suppression() will actually keep & clip what's necessary and
295  // ignore the rest, so we need a clean output buffer
296  memset(tmpbuf, 0, inw * inh);
297  ff_non_maximum_suppression(w, h, tmpbuf, w, directions, w, gradients, w);
298 
299 
300  // keep high values, or low values surrounded by high values
301  ff_double_threshold(s->low_u8, s->high_u8, w, h,
302  tmpbuf, w, tmpbuf, w);
303 
304  blur += calculate_blur(s, w, h, hsub, vsub, directions, w,
305  tmpbuf, w, filterbuf, w);
306  }
307 
308  if (nplanes)
309  blur /= nplanes;
310 
311  s->blur_total += blur;
312 
313  // write stats
314  av_log(ctx, AV_LOG_VERBOSE, "blur: %.7f\n", blur);
315 
316  set_meta(metadata, "lavfi.blur", blur);
317 
318  s->nb_frames = inlink->frame_count_in;
319 
320  return ff_filter_frame(outlink, in);
321 }
322 
324 {
325  BLRContext *s = ctx->priv;
326 
327  if (s->nb_frames > 0) {
328  av_log(ctx, AV_LOG_INFO, "blur mean: %.7f\n",
329  s->blur_total / s->nb_frames);
330  }
331 
332  av_freep(&s->tmpbuf);
333  av_freep(&s->filterbuf);
334  av_freep(&s->gradients);
335  av_freep(&s->directions);
336  av_freep(&s->blks);
337 }
338 
339 static const enum AVPixelFormat pix_fmts[] = {
349 };
350 
351 static const AVFilterPad blurdetect_inputs[] = {
352  {
353  .name = "default",
354  .type = AVMEDIA_TYPE_VIDEO,
355  .config_props = blurdetect_config_input,
356  .filter_frame = blurdetect_filter_frame,
357  },
358 };
359 
361  .name = "blurdetect",
362  .description = NULL_IF_CONFIG_SMALL("Blurdetect filter."),
363  .priv_size = sizeof(BLRContext),
369  .priv_class = &blurdetect_class,
371 };
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:71
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:48
BLRContext::gradients
uint16_t * gradients
Definition: vf_blurdetect.c:65
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1007
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2968
BLRContext::high_u8
uint8_t high_u8
Definition: vf_blurdetect.c:52
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:162
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
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:340
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:28
BLRContext::vsub
int vsub
Definition: vf_blurdetect.c:48
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:191
AVOption
AVOption.
Definition: opt.h:294
b
#define b
Definition: input.c:41
blurdetect_init
static av_cold int blurdetect_init(AVFilterContext *ctx)
Definition: vf_blurdetect.c:84
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:106
AVDictionary
Definition: dict.c:34
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
BLRContext::block_height
int block_height
Definition: vf_blurdetect.c:56
DIRECTION_VERTICAL
@ DIRECTION_VERTICAL
Definition: edge_common.h:36
video.h
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: vf_blurdetect.c:339
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:361
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:73
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3008
BLRContext::low
float low
Definition: vf_blurdetect.c:51
BLRContext::planes
int planes
Definition: vf_blurdetect.c:57
AV_PIX_FMT_GBRAP
@ AV_PIX_FMT_GBRAP
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:212
FLAGS
#define FLAGS
Definition: vf_blurdetect.c:70
set_meta
static void set_meta(AVDictionary **metadata, const char *key, float d)
Definition: vf_blurdetect.c:249
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
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:283
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:64
BLRContext
Definition: vf_blurdetect.c:45
DIRECTION_45DOWN
@ DIRECTION_45DOWN
Definition: edge_common.h:34
ff_video_default_filterpad
const AVFilterPad ff_video_default_filterpad[1]
An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_VIDEO.
Definition: video.c:37
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:86
width
#define width
s
#define s(width, name)
Definition: cbs_vp9.c:198
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:108
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:58
BLRContext::block_width
int block_width
Definition: vf_blurdetect.c:55
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:73
key
const char * key
Definition: hwcontext_opencl.c:179
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:182
comp
static int comp(const float *a, const float *b)
Definition: vf_blurdetect.c:40
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:87
BLRContext::radius
int radius
Definition: vf_blurdetect.c:53
OFFSET
#define OFFSET(x)
Definition: vf_blurdetect.c:69
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:85
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:60
blurdetect_uninit
static av_cold void blurdetect_uninit(AVFilterContext *ctx)
Definition: vf_blurdetect.c:323
AV_PIX_FMT_GRAY8
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
Definition: pixfmt.h:81
qsort.h
planes
static const struct @378 planes[]
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
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:365
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:106
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:89
BLRContext::blks
float * blks
Definition: vf_blurdetect.c:62
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:174
BLRContext::low_u8
uint8_t low_u8
Definition: vf_blurdetect.c:52
BLRContext::nb_planes
int nb_planes
Definition: vf_blurdetect.c:49
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:59
uninit
static void uninit(AVBSFContext *ctx)
Definition: pcm_rechunk.c:68
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
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:60
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:107
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
blurdetect_options
static const AVOption blurdetect_options[]
Definition: vf_blurdetect.c:71
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
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:125
AVFilter
Filter definition.
Definition: avfilter.h:166
BLRContext::block_pct
int block_pct
Definition: vf_blurdetect.c:54
blurdetect_inputs
static const AVFilterPad blurdetect_inputs[]
Definition: vf_blurdetect.c:351
blurdetect_filter_frame
static int blurdetect_filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_blurdetect.c:256
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(blurdetect)
BLRContext::high
float high
Definition: vf_blurdetect.c:51
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:72
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
AVFrame::metadata
AVDictionary * metadata
metadata.
Definition: frame.h:708
BLRContext::filterbuf
uint8_t * filterbuf
Definition: vf_blurdetect.c:63
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:133
BLRContext::directions
int8_t * directions
Definition: vf_blurdetect.c:66
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:78
AVFilterContext
An instance of a filter.
Definition: avfilter.h:409
AV_PIX_FMT_GBRP
@ AV_PIX_FMT_GBRP
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:165
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:77
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
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:183
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:88
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:80
blurdetect_config_input
static int blurdetect_config_input(AVFilterLink *inlink)
Definition: vf_blurdetect.c:94
d
d
Definition: ffmpeg_filter.c:424
imgutils.h
ff_vf_blurdetect
const AVFilter ff_vf_blurdetect
Definition: vf_blurdetect.c:360
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:385
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:79
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
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:173