FFmpeg
af_anlmdn.c
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1 /*
2  * Copyright (c) 2019 Paul B Mahol
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 #include <float.h>
22 
23 #include "libavutil/avassert.h"
24 #include "libavutil/audio_fifo.h"
25 #include "libavutil/avstring.h"
26 #include "libavutil/opt.h"
27 #include "avfilter.h"
28 #include "audio.h"
29 #include "formats.h"
30 
31 #include "af_anlmdndsp.h"
32 
33 #define WEIGHT_LUT_NBITS 20
34 #define WEIGHT_LUT_SIZE (1<<WEIGHT_LUT_NBITS)
35 
36 #define SQR(x) ((x) * (x))
37 
38 typedef struct AudioNLMeansContext {
39  const AVClass *class;
40 
41  float a;
42  int64_t pd;
43  int64_t rd;
44  float m;
45  int om;
46 
49 
50  int K;
51  int S;
52  int N;
53  int H;
54 
55  int offset;
58 
59  int64_t pts;
60 
62  int eof_left;
63 
66 
67 enum OutModes {
72 };
73 
74 #define OFFSET(x) offsetof(AudioNLMeansContext, x)
75 #define AFT AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
76 
77 static const AVOption anlmdn_options[] = {
78  { "s", "set denoising strength", OFFSET(a), AV_OPT_TYPE_FLOAT, {.dbl=0.00001},0.00001, 10, AFT },
79  { "p", "set patch duration", OFFSET(pd), AV_OPT_TYPE_DURATION, {.i64=2000}, 1000, 100000, AFT },
80  { "r", "set research duration", OFFSET(rd), AV_OPT_TYPE_DURATION, {.i64=6000}, 2000, 300000, AFT },
81  { "o", "set output mode", OFFSET(om), AV_OPT_TYPE_INT, {.i64=OUT_MODE}, 0, NB_MODES-1, AFT, "mode" },
82  { "i", "input", 0, AV_OPT_TYPE_CONST, {.i64=IN_MODE}, 0, 0, AFT, "mode" },
83  { "o", "output", 0, AV_OPT_TYPE_CONST, {.i64=OUT_MODE}, 0, 0, AFT, "mode" },
84  { "n", "noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_MODE},0, 0, AFT, "mode" },
85  { "m", "set smooth factor", OFFSET(m), AV_OPT_TYPE_FLOAT, {.dbl=11.}, 1, 15, AFT },
86  { NULL }
87 };
88 
89 AVFILTER_DEFINE_CLASS(anlmdn);
90 
92 {
95  static const enum AVSampleFormat sample_fmts[] = {
98  };
99  int ret;
100 
102  if (!formats)
103  return AVERROR(ENOMEM);
105  if (ret < 0)
106  return ret;
107 
109  if (!layouts)
110  return AVERROR(ENOMEM);
111 
113  if (ret < 0)
114  return ret;
115 
118 }
119 
120 static float compute_distance_ssd_c(const float *f1, const float *f2, ptrdiff_t K)
121 {
122  float distance = 0.;
123 
124  for (int k = -K; k <= K; k++)
125  distance += SQR(f1[k] - f2[k]);
126 
127  return distance;
128 }
129 
130 static void compute_cache_c(float *cache, const float *f,
131  ptrdiff_t S, ptrdiff_t K,
132  ptrdiff_t i, ptrdiff_t jj)
133 {
134  int v = 0;
135 
136  for (int j = jj; j < jj + S; j++, v++)
137  cache[v] += -SQR(f[i - K - 1] - f[j - K - 1]) + SQR(f[i + K] - f[j + K]);
138 }
139 
141 {
144 
145  if (ARCH_X86)
146  ff_anlmdn_init_x86(dsp);
147 }
148 
150 {
151  AudioNLMeansContext *s = ctx->priv;
152  AVFilterLink *outlink = ctx->outputs[0];
153  int newK, newS, newH, newN;
154  AVFrame *new_in, *new_cache;
155 
156  newK = av_rescale(s->pd, outlink->sample_rate, AV_TIME_BASE);
157  newS = av_rescale(s->rd, outlink->sample_rate, AV_TIME_BASE);
158 
159  newH = newK * 2 + 1;
160  newN = newH + (newK + newS) * 2;
161 
162  av_log(ctx, AV_LOG_DEBUG, "K:%d S:%d H:%d N:%d\n", newK, newS, newH, newN);
163 
164  if (!s->cache || s->cache->nb_samples < newS * 2) {
165  new_cache = ff_get_audio_buffer(outlink, newS * 2);
166  if (new_cache) {
167  av_frame_free(&s->cache);
168  s->cache = new_cache;
169  } else {
170  return AVERROR(ENOMEM);
171  }
172  }
173  if (!s->cache)
174  return AVERROR(ENOMEM);
175 
176  s->pdiff_lut_scale = 1.f / s->m * WEIGHT_LUT_SIZE;
177  for (int i = 0; i < WEIGHT_LUT_SIZE; i++) {
178  float w = -i / s->pdiff_lut_scale;
179 
180  s->weight_lut[i] = expf(w);
181  }
182 
183  if (!s->in || s->in->nb_samples < newN) {
184  new_in = ff_get_audio_buffer(outlink, newN);
185  if (new_in) {
186  av_frame_free(&s->in);
187  s->in = new_in;
188  } else {
189  return AVERROR(ENOMEM);
190  }
191  }
192  if (!s->in)
193  return AVERROR(ENOMEM);
194 
195  s->K = newK;
196  s->S = newS;
197  s->H = newH;
198  s->N = newN;
199 
200  return 0;
201 }
202 
203 static int config_output(AVFilterLink *outlink)
204 {
205  AVFilterContext *ctx = outlink->src;
206  AudioNLMeansContext *s = ctx->priv;
207  int ret;
208 
209  s->eof_left = -1;
210  s->pts = AV_NOPTS_VALUE;
211 
212  ret = config_filter(ctx);
213  if (ret < 0)
214  return ret;
215 
216  s->fifo = av_audio_fifo_alloc(outlink->format, outlink->channels, s->N);
217  if (!s->fifo)
218  return AVERROR(ENOMEM);
219 
220  ret = av_audio_fifo_write(s->fifo, (void **)s->in->extended_data, s->K + s->S);
221  if (ret < 0)
222  return ret;
223 
224  ff_anlmdn_init(&s->dsp);
225 
226  return 0;
227 }
228 
229 static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
230 {
231  AudioNLMeansContext *s = ctx->priv;
232  AVFrame *out = arg;
233  const int S = s->S;
234  const int K = s->K;
235  const int om = s->om;
236  const float *f = (const float *)(s->in->extended_data[ch]) + K;
237  float *cache = (float *)s->cache->extended_data[ch];
238  const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->a);
239  float *dst = (float *)out->extended_data[ch] + s->offset;
240  const float smooth = s->m;
241 
242  for (int i = S; i < s->H + S; i++) {
243  float P = 0.f, Q = 0.f;
244  int v = 0;
245 
246  if (i == S) {
247  for (int j = i - S; j <= i + S; j++) {
248  if (i == j)
249  continue;
250  cache[v++] = s->dsp.compute_distance_ssd(f + i, f + j, K);
251  }
252  } else {
253  s->dsp.compute_cache(cache, f, S, K, i, i - S);
254  s->dsp.compute_cache(cache + S, f, S, K, i, i + 1);
255  }
256 
257  for (int j = 0; j < 2 * S && !ctx->is_disabled; j++) {
258  const float distance = cache[j];
259  unsigned weight_lut_idx;
260  float w;
261 
262  if (distance < 0.f) {
263  cache[j] = 0.f;
264  continue;
265  }
266  w = distance * sw;
267  if (w >= smooth)
268  continue;
269  weight_lut_idx = w * s->pdiff_lut_scale;
270  av_assert2(weight_lut_idx < WEIGHT_LUT_SIZE);
271  w = s->weight_lut[weight_lut_idx];
272  P += w * f[i - S + j + (j >= S)];
273  Q += w;
274  }
275 
276  P += f[i];
277  Q += 1;
278 
279  switch (om) {
280  case IN_MODE: dst[i - S] = f[i]; break;
281  case OUT_MODE: dst[i - S] = P / Q; break;
282  case NOISE_MODE: dst[i - S] = f[i] - (P / Q); break;
283  }
284  }
285 
286  return 0;
287 }
288 
290 {
291  AVFilterContext *ctx = inlink->dst;
292  AVFilterLink *outlink = ctx->outputs[0];
293  AudioNLMeansContext *s = ctx->priv;
294  AVFrame *out = NULL;
295  int available, wanted, ret;
296 
297  if (s->pts == AV_NOPTS_VALUE)
298  s->pts = in->pts;
299 
300  ret = av_audio_fifo_write(s->fifo, (void **)in->extended_data,
301  in->nb_samples);
302  av_frame_free(&in);
303 
304  s->offset = 0;
305  available = av_audio_fifo_size(s->fifo);
306  wanted = (available / s->H) * s->H;
307 
308  if (wanted >= s->H && available >= s->N) {
309  out = ff_get_audio_buffer(outlink, wanted);
310  if (!out)
311  return AVERROR(ENOMEM);
312  }
313 
314  while (available >= s->N) {
315  ret = av_audio_fifo_peek(s->fifo, (void **)s->in->extended_data, s->N);
316  if (ret < 0)
317  break;
318 
319  ctx->internal->execute(ctx, filter_channel, out, NULL, inlink->channels);
320 
321  av_audio_fifo_drain(s->fifo, s->H);
322 
323  s->offset += s->H;
324  available -= s->H;
325  }
326 
327  if (out) {
328  out->pts = s->pts;
329  out->nb_samples = s->offset;
330  if (s->eof_left >= 0) {
331  out->nb_samples = FFMIN(s->eof_left, s->offset);
332  s->eof_left -= out->nb_samples;
333  }
334  s->pts += av_rescale_q(s->offset, (AVRational){1, outlink->sample_rate}, outlink->time_base);
335 
336  return ff_filter_frame(outlink, out);
337  }
338 
339  return ret;
340 }
341 
342 static int request_frame(AVFilterLink *outlink)
343 {
344  AVFilterContext *ctx = outlink->src;
345  AudioNLMeansContext *s = ctx->priv;
346  int ret;
347 
348  ret = ff_request_frame(ctx->inputs[0]);
349 
350  if (ret == AVERROR_EOF && s->eof_left != 0) {
351  AVFrame *in;
352 
353  if (s->eof_left < 0)
354  s->eof_left = av_audio_fifo_size(s->fifo) - (s->S + s->K);
355  if (s->eof_left <= 0)
356  return AVERROR_EOF;
357  in = ff_get_audio_buffer(outlink, s->H);
358  if (!in)
359  return AVERROR(ENOMEM);
360 
361  return filter_frame(ctx->inputs[0], in);
362  }
363 
364  return ret;
365 }
366 
367 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
368  char *res, int res_len, int flags)
369 {
370  int ret;
371 
372  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
373  if (ret < 0)
374  return ret;
375 
376  ret = config_filter(ctx);
377  if (ret < 0)
378  return ret;
379 
380  return 0;
381 }
382 
384 {
385  AudioNLMeansContext *s = ctx->priv;
386 
387  av_audio_fifo_free(s->fifo);
388  av_frame_free(&s->in);
389  av_frame_free(&s->cache);
390 }
391 
392 static const AVFilterPad inputs[] = {
393  {
394  .name = "default",
395  .type = AVMEDIA_TYPE_AUDIO,
396  .filter_frame = filter_frame,
397  },
398  { NULL }
399 };
400 
401 static const AVFilterPad outputs[] = {
402  {
403  .name = "default",
404  .type = AVMEDIA_TYPE_AUDIO,
405  .config_props = config_output,
406  .request_frame = request_frame,
407  },
408  { NULL }
409 };
410 
412  .name = "anlmdn",
413  .description = NULL_IF_CONFIG_SMALL("Reduce broadband noise from stream using Non-Local Means."),
414  .query_formats = query_formats,
415  .priv_size = sizeof(AudioNLMeansContext),
416  .priv_class = &anlmdn_class,
417  .uninit = uninit,
418  .inputs = inputs,
419  .outputs = outputs,
423 };
av_audio_fifo_free
void av_audio_fifo_free(AVAudioFifo *af)
Free an AVAudioFifo.
Definition: audio_fifo.c:45
formats
formats
Definition: signature.h:48
ff_get_audio_buffer
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:86
AV_SAMPLE_FMT_FLTP
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:86
ff_anlmdn_init
void ff_anlmdn_init(AudioNLMDNDSPContext *dsp)
Definition: af_anlmdn.c:140
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_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: af_anlmdn.c:289
out
FILE * out
Definition: movenc.c:54
OUT_MODE
@ OUT_MODE
Definition: af_anlmdn.c:69
AudioNLMDNDSPContext::compute_distance_ssd
float(* compute_distance_ssd)(const float *f1, const float *f2, ptrdiff_t K)
Definition: af_anlmdndsp.h:32
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:978
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:953
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
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:111
ff_all_channel_counts
AVFilterChannelLayouts * ff_all_channel_counts(void)
Construct an AVFilterChannelLayouts coding for any channel layout, with known or unknown disposition.
Definition: formats.c:429
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:396
w
uint8_t w
Definition: llviddspenc.c:39
af_anlmdndsp.h
AVOption
AVOption.
Definition: opt.h:248
WEIGHT_LUT_SIZE
#define WEIGHT_LUT_SIZE
Definition: af_anlmdn.c:34
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: af_anlmdn.c:342
AV_OPT_TYPE_DURATION
@ AV_OPT_TYPE_DURATION
Definition: opt.h:239
expf
#define expf(x)
Definition: libm.h:283
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:395
AudioNLMeansContext::N
int N
Definition: af_anlmdn.c:52
AudioNLMeansContext::S
int S
Definition: af_anlmdn.c:51
float.h
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_anlmdn.c:203
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:149
AudioNLMeansContext::pdiff_lut_scale
float pdiff_lut_scale
Definition: af_anlmdn.c:47
AVFormatContext::internal
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1555
outputs
static const AVFilterPad outputs[]
Definition: af_anlmdn.c:401
AudioNLMeansContext::in
AVFrame * in
Definition: af_anlmdn.c:56
config_filter
static int config_filter(AVFilterContext *ctx)
Definition: af_anlmdn.c:149
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:65
formats.h
S
#define S(s, c, i)
Definition: flacdsp_template.c:46
AVAudioFifo
Context for an Audio FIFO Buffer.
Definition: audio_fifo.c:34
av_audio_fifo_drain
int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)
Drain data from an AVAudioFifo.
Definition: audio_fifo.c:201
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
AudioNLMeansContext::om
int om
Definition: af_anlmdn.c:45
avassert.h
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:580
anlmdn_options
static const AVOption anlmdn_options[]
Definition: af_anlmdn.c:77
NOISE_MODE
@ NOISE_MODE
Definition: af_anlmdn.c:70
s
#define s(width, name)
Definition: cbs_vp9.c:257
AudioNLMeansContext::fifo
AVAudioFifo * fifo
Definition: af_anlmdn.c:61
AudioNLMeansContext::offset
int offset
Definition: af_anlmdn.c:55
AudioNLMeansContext::H
int H
Definition: af_anlmdn.c:53
av_audio_fifo_write
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
Write data to an AVAudioFifo.
Definition: audio_fifo.c:112
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:202
ctx
AVFormatContext * ctx
Definition: movenc.c:48
SQR
#define SQR(x)
Definition: af_anlmdn.c:36
AudioNLMeansContext
Definition: af_anlmdn.c:38
av_rescale_q
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
AudioNLMDNDSPContext
Definition: af_anlmdndsp.h:31
f
#define f(width, name)
Definition: cbs_vp9.c:255
arg
const char * arg
Definition: jacosubdec.c:67
if
if(ret)
Definition: filter_design.txt:179
AudioNLMeansContext::cache
AVFrame * cache
Definition: af_anlmdn.c:57
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AudioNLMeansContext::dsp
AudioNLMDNDSPContext dsp
Definition: af_anlmdn.c:64
NULL
#define NULL
Definition: coverity.c:32
filter_channel
static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
Definition: af_anlmdn.c:229
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
av_audio_fifo_alloc
AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)
Allocate an AVAudioFifo.
Definition: audio_fifo.c:59
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(anlmdn)
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
OutModes
OutModes
Definition: af_afftdn.c:37
ff_anlmdn_init_x86
void ff_anlmdn_init_x86(AudioNLMDNDSPContext *s)
Definition: af_anlmdn_init.c:28
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
P
#define P
AudioNLMeansContext::m
float m
Definition: af_anlmdn.c:44
AV_SAMPLE_FMT_NONE
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_anlmdn.c:383
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
compute_distance_ssd_c
static float compute_distance_ssd_c(const float *f1, const float *f2, ptrdiff_t K)
Definition: af_anlmdn.c:120
AFT
#define AFT
Definition: af_anlmdn.c:75
AudioNLMDNDSPContext::compute_cache
void(* compute_cache)(float *cache, const float *f, ptrdiff_t S, ptrdiff_t K, ptrdiff_t i, ptrdiff_t jj)
Definition: af_anlmdndsp.h:33
ff_filter_process_command
int ff_filter_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
Definition: avfilter.c:842
FFMIN
#define FFMIN(a, b)
Definition: common.h:105
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
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_anlmdn.c:367
AudioNLMeansContext::rd
int64_t rd
Definition: af_anlmdn.c:43
av_audio_fifo_size
int av_audio_fifo_size(AVAudioFifo *af)
Get the current number of samples in the AVAudioFifo available for reading.
Definition: audio_fifo.c:228
AV_OPT_TYPE_FLOAT
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
AudioNLMeansContext::weight_lut
float weight_lut[WEIGHT_LUT_SIZE]
Definition: af_anlmdn.c:48
AudioNLMeansContext::pts
int64_t pts
Definition: af_anlmdn.c:59
AudioNLMeansContext::pd
int64_t pd
Definition: af_anlmdn.c:42
av_assert2
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
Definition: avassert.h:64
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:369
i
int i
Definition: input.c:407
available
if no frame is available
Definition: filter_design.txt:166
AV_TIME_BASE
#define AV_TIME_BASE
Internal time base represented as integer.
Definition: avutil.h:254
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:350
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
audio_fifo.h
IN_MODE
@ IN_MODE
Definition: af_anlmdn.c:68
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
av_rescale
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
ff_af_anlmdn
const AVFilter ff_af_anlmdn
Definition: af_anlmdn.c:411
smooth
static float smooth(DeshakeOpenCLContext *deshake_ctx, float *gauss_kernel, int length, float max_val, AVFifoBuffer *values)
Definition: vf_deshake_opencl.c:903
AVFilter
Filter definition.
Definition: avfilter.h:145
ret
ret
Definition: filter_design.txt:187
NB_MODES
@ NB_MODES
Definition: af_anlmdn.c:71
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_anlmdn.c:91
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:414
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:225
avfilter.h
AVFilterContext
An instance of a filter.
Definition: avfilter.h:333
OFFSET
#define OFFSET(x)
Definition: af_anlmdn.c:74
compute_cache_c
static void compute_cache_c(float *cache, const float *f, ptrdiff_t S, ptrdiff_t K, ptrdiff_t i, ptrdiff_t jj)
Definition: af_anlmdn.c:130
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
audio.h
AudioNLMeansContext::a
float a
Definition: af_anlmdn.c:41
distance
static float distance(float x, float y, int band)
Definition: nellymoserenc.c:233
AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
#define AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL
Same as AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, except that the filter will have its filter_frame() c...
Definition: avfilter.h:134
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
ff_set_common_samplerates
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:568
avstring.h
av_audio_fifo_peek
int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)
Peek data from an AVAudioFifo.
Definition: audio_fifo.c:138
AV_OPT_TYPE_CONST
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
AudioNLMeansContext::eof_left
int eof_left
Definition: af_anlmdn.c:62
AudioNLMeansContext::K
int K
Definition: af_anlmdn.c:50
inputs
static const AVFilterPad inputs[]
Definition: af_anlmdn.c:392
ff_set_common_channel_layouts
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *channel_layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates.
Definition: formats.c:561