FFmpeg
vf_noise.c
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1 /*
2  * Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
3  * Copyright (c) 2013 Paul B Mahol
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * noise generator
25  */
26 
27 #include "libavutil/emms.h"
28 #include "libavutil/mem.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/imgutils.h"
31 #include "libavutil/lfg.h"
32 #include "libavutil/pixdesc.h"
33 #include "avfilter.h"
34 #include "formats.h"
35 #include "internal.h"
36 #include "vf_noise.h"
37 #include "video.h"
38 
39 typedef struct ThreadData {
40  AVFrame *in, *out;
41 } ThreadData;
42 
43 #define OFFSET(x) offsetof(NoiseContext, x)
44 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
45 
46 #define NOISE_PARAMS(name, x, param) \
47  {#name"_seed", "set component #"#x" noise seed", OFFSET(param.seed), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX, FLAGS}, \
48  {#name"_strength", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
49  {#name"s", "set component #"#x" strength", OFFSET(param.strength), AV_OPT_TYPE_INT, {.i64=0}, 0, 100, FLAGS}, \
50  {#name"_flags", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, .unit = #name"_flags"}, \
51  {#name"f", "set component #"#x" flags", OFFSET(param.flags), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, 31, FLAGS, .unit = #name"_flags"}, \
52  {"a", "averaged noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_AVERAGED}, 0, 0, FLAGS, .unit = #name"_flags"}, \
53  {"p", "(semi)regular pattern", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_PATTERN}, 0, 0, FLAGS, .unit = #name"_flags"}, \
54  {"t", "temporal noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_TEMPORAL}, 0, 0, FLAGS, .unit = #name"_flags"}, \
55  {"u", "uniform noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_UNIFORM}, 0, 0, FLAGS, .unit = #name"_flags"},
56 
57 static const AVOption noise_options[] = {
58  NOISE_PARAMS(all, 0, all)
59  NOISE_PARAMS(c0, 0, param[0])
60  NOISE_PARAMS(c1, 1, param[1])
61  NOISE_PARAMS(c2, 2, param[2])
62  NOISE_PARAMS(c3, 3, param[3])
63  {NULL}
64 };
65 
67 
68 static const int8_t patt[4] = { -1, 0, 1, 0 };
69 
70 #define RAND_N(range) ((int) ((double) range * av_lfg_get(lfg) / (UINT_MAX + 1.0)))
71 static av_cold int init_noise(NoiseContext *n, int comp)
72 {
73  int8_t *noise = av_malloc(MAX_NOISE * sizeof(int8_t));
74  FilterParams *fp = &n->param[comp];
75  AVLFG *lfg = &n->param[comp].lfg;
76  int strength = fp->strength;
77  int flags = fp->flags;
78  int i, j;
79 
80  if (!noise)
81  return AVERROR(ENOMEM);
82 
83  av_lfg_init(&fp->lfg, fp->seed + comp*31415U);
84 
85  for (i = 0, j = 0; i < MAX_NOISE; i++, j++) {
86  if (flags & NOISE_UNIFORM) {
87  if (flags & NOISE_AVERAGED) {
88  if (flags & NOISE_PATTERN) {
89  noise[i] = (RAND_N(strength) - strength / 2) / 6
90  + patt[j % 4] * strength * 0.25 / 3;
91  } else {
92  noise[i] = (RAND_N(strength) - strength / 2) / 3;
93  }
94  } else {
95  if (flags & NOISE_PATTERN) {
96  noise[i] = (RAND_N(strength) - strength / 2) / 2
97  + patt[j % 4] * strength * 0.25;
98  } else {
99  noise[i] = RAND_N(strength) - strength / 2;
100  }
101  }
102  } else {
103  double x1, x2, w, y1;
104  do {
105  x1 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
106  x2 = 2.0 * av_lfg_get(lfg) / (float)UINT_MAX - 1.0;
107  w = x1 * x1 + x2 * x2;
108  } while (w >= 1.0);
109 
110  w = sqrt((-2.0 * log(w)) / w);
111  y1 = x1 * w;
112  y1 *= strength / sqrt(3.0);
113  if (flags & NOISE_PATTERN) {
114  y1 /= 2;
115  y1 += patt[j % 4] * strength * 0.35;
116  }
117  y1 = av_clipf(y1, -128, 127);
118  if (flags & NOISE_AVERAGED)
119  y1 /= 3.0;
120  noise[i] = (int)y1;
121  }
122  if (RAND_N(6) == 0)
123  j--;
124  }
125 
126  for (i = 0; i < MAX_RES; i++)
127  for (j = 0; j < 3; j++)
128  fp->prev_shift[i][j] = noise + (av_lfg_get(lfg) & (MAX_SHIFT - 1));
129 
130  fp->noise = noise;
131  return 0;
132 }
133 
135 {
137  int fmt, ret;
138 
139  for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
141  if (desc->flags & AV_PIX_FMT_FLAG_PLANAR && !(desc->comp[0].depth & 7)
142  && (ret = ff_add_format(&formats, fmt)) < 0)
143  return ret;
144  }
145 
147 }
148 
150 {
151  NoiseContext *n = inlink->dst->priv;
153  int ret;
154 
156 
157  if ((ret = av_image_fill_linesizes(n->bytewidth, inlink->format, inlink->w)) < 0)
158  return ret;
159 
160  n->height[1] = n->height[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h);
161  n->height[0] = n->height[3] = inlink->h;
162 
163  return 0;
164 }
165 
166 void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise,
167  int len, int shift)
168 {
169  int i;
170 
171  noise += shift;
172  for (i = 0; i < len; i++) {
173  int v = src[i] + noise[i];
174 
175  dst[i] = av_clip_uint8(v);
176  }
177 }
178 
179 void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src,
180  int len, const int8_t * const *shift)
181 {
182  int i;
183  const int8_t *src2 = (const int8_t*)src;
184 
185  for (i = 0; i < len; i++) {
186  const int n = shift[0][i] + shift[1][i] + shift[2][i];
187  dst[i] = src2[i] + ((n * src2[i]) >> 7);
188  }
189 }
190 
191 static void noise(uint8_t *dst, const uint8_t *src,
192  int dst_linesize, int src_linesize,
193  int width, int start, int end, NoiseContext *n, int comp)
194 {
195  FilterParams *p = &n->param[comp];
196  int8_t *noise = p->noise;
197  const int flags = p->flags;
198  int y;
199 
200  if (!noise) {
201  if (dst != src)
202  av_image_copy_plane(dst, dst_linesize, src, src_linesize, width, end - start);
203  return;
204  }
205 
206  for (y = start; y < end; y++) {
207  const int ix = y & (MAX_RES - 1);
208  int x;
209  for (x=0; x < width; x+= MAX_RES) {
210  int w = FFMIN(width - x, MAX_RES);
211  int shift = p->rand_shift[ix];
212 
213  if (flags & NOISE_AVERAGED) {
214  n->line_noise_avg(dst + x, src + x, w, (const int8_t**)p->prev_shift[ix]);
215  p->prev_shift[ix][shift & 3] = noise + shift;
216  } else {
217  n->line_noise(dst + x, src + x, noise, w, shift);
218  }
219  }
220  dst += dst_linesize;
221  src += src_linesize;
222  }
223 }
224 
225 static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
226 {
227  NoiseContext *s = ctx->priv;
228  ThreadData *td = arg;
229  int plane;
230 
231  for (plane = 0; plane < s->nb_planes; plane++) {
232  const int height = s->height[plane];
233  const int start = (height * jobnr ) / nb_jobs;
234  const int end = (height * (jobnr+1)) / nb_jobs;
235  noise(td->out->data[plane] + start * td->out->linesize[plane],
236  td->in->data[plane] + start * td->in->linesize[plane],
237  td->out->linesize[plane], td->in->linesize[plane],
238  s->bytewidth[plane], start, end, s, plane);
239  }
240  return 0;
241 }
242 
243 static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
244 {
245  AVFilterContext *ctx = inlink->dst;
246  AVFilterLink *outlink = ctx->outputs[0];
247  NoiseContext *n = ctx->priv;
248  ThreadData td;
249  AVFrame *out;
250  int comp, i;
251 
252  if (av_frame_is_writable(inpicref)) {
253  out = inpicref;
254  } else {
255  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
256  if (!out) {
257  av_frame_free(&inpicref);
258  return AVERROR(ENOMEM);
259  }
260  av_frame_copy_props(out, inpicref);
261  }
262 
263  for (comp = 0; comp < 4; comp++) {
264  FilterParams *fp = &n->param[comp];
265 
266  if ((!fp->rand_shift_init || (fp->flags & NOISE_TEMPORAL)) && fp->strength) {
267 
268  for (i = 0; i < MAX_RES; i++) {
269  fp->rand_shift[i] = av_lfg_get(&fp->lfg) & (MAX_SHIFT - 1);
270  }
271  fp->rand_shift_init = 1;
272  }
273  }
274 
275  td.in = inpicref; td.out = out;
278  emms_c();
279 
280  if (inpicref != out)
281  av_frame_free(&inpicref);
282  return ff_filter_frame(outlink, out);
283 }
284 
286 {
287  NoiseContext *n = ctx->priv;
288  int ret, i;
289 
290  for (i = 0; i < 4; i++) {
291  if (n->all.seed >= 0)
292  n->param[i].seed = n->all.seed;
293  else
294  n->param[i].seed = 123457;
295  if (n->all.strength)
296  n->param[i].strength = n->all.strength;
297  if (n->all.flags)
298  n->param[i].flags = n->all.flags;
299  }
300 
301  for (i = 0; i < 4; i++) {
302  if (n->param[i].strength && ((ret = init_noise(n, i)) < 0))
303  return ret;
304  }
305 
308 
309 #if ARCH_X86
311 #endif
312 
313  return 0;
314 }
315 
317 {
318  NoiseContext *n = ctx->priv;
319  int i;
320 
321  for (i = 0; i < 4; i++)
322  av_freep(&n->param[i].noise);
323 }
324 
325 static const AVFilterPad noise_inputs[] = {
326  {
327  .name = "default",
328  .type = AVMEDIA_TYPE_VIDEO,
329  .filter_frame = filter_frame,
330  .config_props = config_input,
331  },
332 };
333 
335  .name = "noise",
336  .description = NULL_IF_CONFIG_SMALL("Add noise."),
337  .priv_size = sizeof(NoiseContext),
338  .init = init,
339  .uninit = uninit,
343  .priv_class = &noise_class,
345 };
formats
formats
Definition: signature.h:48
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:112
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_noise.c:316
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
noise_class
static const AVClass noise_class
Definition: noise.c:222
out
FILE * out
Definition: movenc.c:55
av_lfg_init
av_cold void av_lfg_init(AVLFG *c, unsigned int seed)
Definition: lfg.c:32
NOISE_PATTERN
#define NOISE_PATTERN
Definition: vf_noise.h:35
comp
static void comp(unsigned char *dst, ptrdiff_t dst_stride, unsigned char *src, ptrdiff_t src_stride, int add)
Definition: eamad.c:81
FilterParams::lfg
AVLFG lfg
Definition: vf_noise.h:40
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1015
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2965
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
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_noise.c:149
normalize.log
log
Definition: normalize.py:21
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:160
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:374
pixdesc.h
w
uint8_t w
Definition: llviddspenc.c:38
AVOption
AVOption.
Definition: opt.h:357
FILTER_QUERY_FUNC
#define FILTER_QUERY_FUNC(func)
Definition: internal.h:159
noise
static void noise(uint8_t *dst, const uint8_t *src, int dst_linesize, int src_linesize, int width, int start, int end, NoiseContext *n, int comp)
Definition: vf_noise.c:191
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:170
c1
static const uint64_t c1
Definition: murmur3.c:52
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:527
vf_noise.h
video.h
ThreadData::in
AVFrame * in
Definition: af_adecorrelate.c:154
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:395
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
av_image_copy_plane
void av_image_copy_plane(uint8_t *dst, int dst_linesize, const uint8_t *src, int src_linesize, int bytewidth, int height)
Copy image plane from src to dst.
Definition: imgutils.c:374
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
formats.h
FilterParams::strength
int strength
Definition: vf_noise.h:38
filter_slice
static int filter_slice(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: vf_noise.c:225
av_pix_fmt_count_planes
int av_pix_fmt_count_planes(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:3005
FilterParams::rand_shift_init
int rand_shift_init
Definition: vf_noise.h:45
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_noise.c:285
MAX_SHIFT
#define MAX_SHIFT
Definition: vf_noise.h:29
NoiseContext
Definition: noise.c:63
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:33
FilterParams::flags
unsigned flags
Definition: vf_noise.h:39
init_noise
static av_cold int init_noise(NoiseContext *n, int comp)
Definition: vf_noise.c:71
av_cold
#define av_cold
Definition: attributes.h:90
ff_set_common_formats
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:868
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
emms_c
#define emms_c()
Definition: emms.h:63
float
float
Definition: af_crystalizer.c:121
width
#define width
av_image_fill_linesizes
int av_image_fill_linesizes(int linesizes[4], enum AVPixelFormat pix_fmt, int width)
Fill plane linesizes for an image with pixel format pix_fmt and width width.
Definition: imgutils.c:89
s
#define s(width, name)
Definition: cbs_vp9.c:198
av_lfg_get
static unsigned int av_lfg_get(AVLFG *c)
Get the next random unsigned 32-bit number using an ALFG.
Definition: lfg.h:53
AV_CEIL_RSHIFT
#define AV_CEIL_RSHIFT(a, b)
Definition: common.h:60
lfg.h
NoiseContext::height
int height[4]
Definition: vf_noise.h:52
ctx
AVFormatContext * ctx
Definition: movenc.c:49
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:182
arg
const char * arg
Definition: jacosubdec.c:67
MAX_NOISE
#define MAX_NOISE
Definition: vf_noise.h:28
NULL
#define NULL
Definition: coverity.c:32
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:709
NoiseContext::line_noise
void(* line_noise)(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
Definition: vf_noise.h:55
NoiseContext::all
FilterParams all
Definition: vf_noise.h:53
ff_add_format
int ff_add_format(AVFilterFormats **avff, int64_t fmt)
Add fmt to the list of media formats contained in *avff.
Definition: formats.c:505
ff_vf_noise
const AVFilter ff_vf_noise
Definition: vf_noise.c:334
av_clipf
av_clipf
Definition: af_crystalizer.c:121
ff_noise_init_x86
av_cold void ff_noise_init_x86(NoiseContext *n)
Definition: vf_noise.c:101
FilterParams
filter data
Definition: mlp.h:86
AVLFG
Context structure for the Lagged Fibonacci PRNG.
Definition: lfg.h:33
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:94
shift
static int shift(int a, int b)
Definition: bonk.c:261
RAND_N
#define RAND_N(range)
Definition: vf_noise.c:70
FilterParams::seed
int seed
Definition: vf_noise.h:41
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:645
FilterParams::prev_shift
int8_t * prev_shift[MAX_RES][3]
Definition: vf_noise.h:43
noise_inputs
static const AVFilterPad noise_inputs[]
Definition: vf_noise.c:325
height
#define height
NOISE_PARAMS
#define NOISE_PARAMS(name, x, param)
Definition: vf_noise.c:46
FilterParams::noise
int8_t * noise
Definition: vf_noise.h:42
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(noise)
internal.h
FilterParams::rand_shift
int rand_shift[MAX_RES]
Definition: vf_noise.h:44
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:147
emms.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
src2
const pixel * src2
Definition: h264pred_template.c:422
ff_line_noise_avg_c
void ff_line_noise_avg_c(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
Definition: vf_noise.c:179
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:827
MAX_RES
#define MAX_RES
Definition: vf_noise.h:30
ThreadData
Used for passing data between threads.
Definition: dsddec.c:71
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
NOISE_AVERAGED
#define NOISE_AVERAGED
Definition: vf_noise.h:34
len
int len
Definition: vorbis_enc_data.h:426
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:39
AVFilter
Filter definition.
Definition: avfilter.h:166
ret
ret
Definition: filter_design.txt:187
U
#define U(x)
Definition: vpx_arith.h:37
ff_line_noise_c
void ff_line_noise_c(uint8_t *dst, const uint8_t *src, const int8_t *noise, int len, int shift)
Definition: vf_noise.c:166
NOISE_UNIFORM
#define NOISE_UNIFORM
Definition: vf_noise.h:32
c2
static const uint64_t c2
Definition: murmur3.c:53
NoiseContext::param
FilterParams param[4]
Definition: vf_noise.h:54
patt
static const int8_t patt[4]
Definition: vf_noise.c:68
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AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:132
NoiseContext::line_noise_avg
void(* line_noise_avg)(uint8_t *dst, const uint8_t *src, int len, const int8_t *const *shift)
Definition: vf_noise.h:56
NoiseContext::nb_planes
int nb_planes
Definition: vf_noise.h:50
av_clip_uint8
#define av_clip_uint8
Definition: common.h:106
AVFilterContext
An instance of a filter.
Definition: avfilter.h:407
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:117
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
mem.h
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:183
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
src
INIT_CLIP pixel * src
Definition: h264pred_template.c:418
imgutils.h
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
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:419
noise_options
static const AVOption noise_options[]
Definition: vf_noise.c:57
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: vf_noise.c:134
ff_filter_execute
static av_always_inline int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)
Definition: internal.h:134
NoiseContext::bytewidth
int bytewidth[4]
Definition: vf_noise.h:51
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
Definition: vf_noise.c:243
int
int
Definition: ffmpeg_filter.c:424
NOISE_TEMPORAL
#define NOISE_TEMPORAL
Definition: vf_noise.h:33