FFmpeg: libavfilter/af_anlmdn.c Source File

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libavfilter

af_anlmdn.c

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1 /*

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 */

21 #include <float.h>

23 #include "libavutil/avassert.h"

24 #include "libavutil/opt.h"

25 #include "avfilter.h"

26 #include "audio.h"

27 #include "filters.h"

29 #include "af_anlmdndsp.h"

31 #define WEIGHT_LUT_NBITS 20

32 #define WEIGHT_LUT_SIZE (1<<WEIGHT_LUT_NBITS)

34 typedef struct AudioNLMeansContext {

35 const AVClass *class;

37 float a;

38 int64_t pd;

39 int64_t rd;

40 float m;

41 int om;

43 float pdiff_lut_scale;

44 float weight_lut[WEIGHT_LUT_SIZE];

46 int K;

47 int S;

48 int N;

49 int H;

51 AVFrame *in;

52 AVFrame *cache;

53 AVFrame *window;

55 AudioNLMDNDSPContext dsp;

56 } AudioNLMeansContext;

58 enum OutModes {

59 IN_MODE,

60 OUT_MODE,

61 NOISE_MODE,

62 NB_MODES

63 };

65 #define OFFSET(x) offsetof(AudioNLMeansContext, x)

66 #define AFT AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM

68 static const AVOption anlmdn_options[] = {

69 { "strength", "set denoising strength", OFFSET(a), AV_OPT_TYPE_FLOAT, {.dbl=0.00001},0.00001, 10000, AFT },

70 { "s", "set denoising strength", OFFSET(a), AV_OPT_TYPE_FLOAT, {.dbl=0.00001},0.00001, 10000, AFT },

71 { "patch", "set patch duration", OFFSET(pd), AV_OPT_TYPE_DURATION, {.i64=2000}, 1000, 100000, AFT },

72 { "p", "set patch duration", OFFSET(pd), AV_OPT_TYPE_DURATION, {.i64=2000}, 1000, 100000, AFT },

73 { "research", "set research duration", OFFSET(rd), AV_OPT_TYPE_DURATION, {.i64=6000}, 2000, 300000, AFT },

74 { "r", "set research duration", OFFSET(rd), AV_OPT_TYPE_DURATION, {.i64=6000}, 2000, 300000, AFT },

75 { "output", "set output mode", OFFSET(om), AV_OPT_TYPE_INT, {.i64=OUT_MODE}, 0, NB_MODES-1, AFT, .unit = "mode" },

76 { "o", "set output mode", OFFSET(om), AV_OPT_TYPE_INT, {.i64=OUT_MODE}, 0, NB_MODES-1, AFT, .unit = "mode" },

77 { "i", "input", 0, AV_OPT_TYPE_CONST, {.i64=IN_MODE}, 0, 0, AFT, .unit = "mode" },

78 { "o", "output", 0, AV_OPT_TYPE_CONST, {.i64=OUT_MODE}, 0, 0, AFT, .unit = "mode" },

79 { "n", "noise", 0, AV_OPT_TYPE_CONST, {.i64=NOISE_MODE},0, 0, AFT, .unit = "mode" },

80 { "smooth", "set smooth factor", OFFSET(m), AV_OPT_TYPE_FLOAT, {.dbl=11.}, 1, 1000, AFT },

81 { "m", "set smooth factor", OFFSET(m), AV_OPT_TYPE_FLOAT, {.dbl=11.}, 1, 1000, AFT },

82 { NULL }

83 };

85 AVFILTER_DEFINE_CLASS(anlmdn);

87 static inline float sqrdiff(float x, float y)

88 {

89 const float diff = x - y;

91 return diff * diff;

92 }

94 static float compute_distance_ssd_c(const float *f1, const float *f2, ptrdiff_t K)

95 {

96 float distance = 0.;

98 for (int k = -K; k <= K; k++)

99 distance += sqrdiff(f1[k], f2[k]);

100

101 return distance;

102 }

103

104 static void compute_cache_c(float *cache, const float *f,

105 ptrdiff_t S, ptrdiff_t K,

106 ptrdiff_t i, ptrdiff_t jj)

107 {

108 int v = 0;

109

110 for (int j = jj; j < jj + S; j++, v++)

111 cache[v] += -sqrdiff(f[i - K - 1], f[j - K - 1]) + sqrdiff(f[i + K], f[j + K]);

112 }

113

114 void ff_anlmdn_init(AudioNLMDNDSPContext *dsp)

115 {

116 dsp->compute_distance_ssd = compute_distance_ssd_c;

117 dsp->compute_cache = compute_cache_c;

118

119 #if ARCH_X86

120 ff_anlmdn_init_x86(dsp);

121 #endif

122 }

123

124 static int config_filter(AVFilterContext *ctx)

125 {

126 AudioNLMeansContext *s = ctx->priv;

127 AVFilterLink *outlink = ctx->outputs[0];

128 int newK, newS, newH, newN;

129

130 newK = av_rescale(s->pd, outlink->sample_rate, AV_TIME_BASE);

131 newS = av_rescale(s->rd, outlink->sample_rate, AV_TIME_BASE);

132

133 newH = newK * 2 + 1;

134 newN = newH + (newK + newS) * 2;

135

136 av_log(ctx, AV_LOG_DEBUG, "K:%d S:%d H:%d N:%d\n", newK, newS, newH, newN);

137

138 if (!s->cache || s->cache->nb_samples < newS * 2) {

139 AVFrame *new_cache = ff_get_audio_buffer(outlink, newS * 2);

140 if (new_cache) {

141 if (s->cache)

142 av_samples_copy(new_cache->extended_data, s->cache->extended_data, 0, 0,

143 s->cache->nb_samples, new_cache->ch_layout.nb_channels, new_cache->format);

144 av_frame_free(&s->cache);

145 s->cache = new_cache;

146 } else {

147 return AVERROR(ENOMEM);

148 }

149 }

150 if (!s->cache)

151 return AVERROR(ENOMEM);

152

153 if (!s->window || s->window->nb_samples < newN) {

154 AVFrame *new_window = ff_get_audio_buffer(outlink, newN);

155 if (new_window) {

156 if (s->window)

157 av_samples_copy(new_window->extended_data, s->window->extended_data, 0, 0,

158 s->window->nb_samples, new_window->ch_layout.nb_channels, new_window->format);

159 av_frame_free(&s->window);

160 s->window = new_window;

161 } else {

162 return AVERROR(ENOMEM);

163 }

164 }

165 if (!s->window)

166 return AVERROR(ENOMEM);

167

168 s->pdiff_lut_scale = 1.f / s->m * WEIGHT_LUT_SIZE;

169 for (int i = 0; i < WEIGHT_LUT_SIZE; i++) {

170 float w = -i / s->pdiff_lut_scale;

171

172 s->weight_lut[i] = expf(w);

173 }

174

175 s->K = newK;

176 s->S = newS;

177 s->H = newH;

178 s->N = newN;

179

180 return 0;

181 }

182

183 static int config_output(AVFilterLink *outlink)

184 {

185 AVFilterContext *ctx = outlink->src;

186 AudioNLMeansContext *s = ctx->priv;

187 int ret;

188

189 ret = config_filter(ctx);

190 if (ret < 0)

191 return ret;

192

193 ff_anlmdn_init(&s->dsp);

194

195 return 0;

196 }

197

198 static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)

199 {

200 AudioNLMeansContext *s = ctx->priv;

201 AVFrame *out = arg;

202 const int S = s->S;

203 const int K = s->K;

204 const int N = s->N;

205 const int H = s->H;

206 const int om = s->om;

207 const float *f = (const float *)(s->window->extended_data[ch]) + K;

208 float *cache = (float *)s->cache->extended_data[ch];

209 const float sw = (65536.f / (4 * K + 2)) / sqrtf(s->a);

210 float *dst = (float *)out->extended_data[ch];

211 const float *const weight_lut = s->weight_lut;

212 const float pdiff_lut_scale = s->pdiff_lut_scale;

213 const float smooth = fminf(s->m, WEIGHT_LUT_SIZE / pdiff_lut_scale);

214 const int offset = N - H;

215 float *src = (float *)s->window->extended_data[ch];

216 const AVFrame *const in = s->in;

217

218 memmove(src, &src[H], offset * sizeof(float));

219 memcpy(&src[offset], in->extended_data[ch], in->nb_samples * sizeof(float));

220 memset(&src[offset + in->nb_samples], 0, (H - in->nb_samples) * sizeof(float));

221

222 for (int i = S; i < H + S; i++) {

223 float P = 0.f, Q = 0.f;

224 int v = 0;

225

226 if (i == S) {

227 for (int j = i - S; j <= i + S; j++) {

228 if (i == j)

229 continue;

230 cache[v++] = s->dsp.compute_distance_ssd(f + i, f + j, K);

231 }

232 } else {

233 s->dsp.compute_cache(cache, f, S, K, i, i - S);

234 s->dsp.compute_cache(cache + S, f, S, K, i, i + 1);

235 }

236

237 for (int j = 0; j < 2 * S && !ctx->is_disabled; j++) {

238 float distance = cache[j];

239 unsigned weight_lut_idx;

240 float w;

241

242 if (distance < 0.f)

243 cache[j] = distance = 0.f;

244 w = distance * sw;

245 if (w >= smooth)

246 continue;

247 weight_lut_idx = w * pdiff_lut_scale;

248 av_assert2(weight_lut_idx < WEIGHT_LUT_SIZE);

249 w = weight_lut[weight_lut_idx];

250 P += w * f[i - S + j + (j >= S)];

251 Q += w;

252 }

253

254 P += f[i];

255 Q += 1.f;

256

257 switch (om) {

258 case IN_MODE: dst[i - S] = f[i]; break;

259 case OUT_MODE: dst[i - S] = P / Q; break;

260 case NOISE_MODE: dst[i - S] = f[i] - (P / Q); break;

261 }

262 }

263

264 return 0;

265 }

266

267 static int filter_frame(AVFilterLink *inlink, AVFrame *in)

268 {

269 AVFilterContext *ctx = inlink->dst;

270 AVFilterLink *outlink = ctx->outputs[0];

271 AudioNLMeansContext *s = ctx->priv;

272 AVFrame *out;

273

274 if (av_frame_is_writable(in)) {

275 out = in;

276 } else {

277 out = ff_get_audio_buffer(outlink, in->nb_samples);

278 if (!out) {

279 av_frame_free(&in);

280 return AVERROR(ENOMEM);

281 }

282

283 out->pts = in->pts;

284 }

285

286 s->in = in;

287 ff_filter_execute(ctx, filter_channel, out, NULL, inlink->ch_layout.nb_channels);

288

289 if (out != in)

290 av_frame_free(&in);

291 return ff_filter_frame(outlink, out);

292 }

293

294 static int activate(AVFilterContext *ctx)

295 {

296 AVFilterLink *inlink = ctx->inputs[0];

297 AVFilterLink *outlink = ctx->outputs[0];

298 AudioNLMeansContext *s = ctx->priv;

299 AVFrame *in = NULL;

300 int ret = 0, status;

301 int64_t pts;

302

303 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);

304

305 ret = ff_inlink_consume_samples(inlink, s->H, s->H, &in);

306 if (ret < 0)

307 return ret;

308

309 if (ret > 0) {

310 return filter_frame(inlink, in);

311 } else if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {

312 ff_outlink_set_status(outlink, status, pts);

313 return 0;

314 } else {

315 if (ff_inlink_queued_samples(inlink) >= s->H) {

316 ff_filter_set_ready(ctx, 10);

317 } else if (ff_outlink_frame_wanted(outlink)) {

318 ff_inlink_request_frame(inlink);

319 }

320 return 0;

321 }

322 }

323

324 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,

325 char *res, int res_len, int flags)

326 {

327 int ret;

328

329 ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);

330 if (ret < 0)

331 return ret;

332

333 return config_filter(ctx);

334 }

335

336 static av_cold void uninit(AVFilterContext *ctx)

337 {

338 AudioNLMeansContext *s = ctx->priv;

339

340 av_frame_free(&s->cache);

341 av_frame_free(&s->window);

342 }

343

344 static const AVFilterPad outputs[] = {

345 {

346 .name = "default",

347 .type = AVMEDIA_TYPE_AUDIO,

348 .config_props = config_output,

349 },

350 };

351

352 const FFFilter ff_af_anlmdn = {

353 .p.name = "anlmdn",

354 .p.description = NULL_IF_CONFIG_SMALL("Reduce broadband noise from stream using Non-Local Means."),

355 .p.priv_class = &anlmdn_class,

356 .p.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL |

357 AVFILTER_FLAG_SLICE_THREADS,

358 .priv_size = sizeof(AudioNLMeansContext),

359 .activate = activate,

360 .uninit = uninit,

361 FILTER_INPUTS(ff_audio_default_filterpad),

362 FILTER_OUTPUTS(outputs),

363 FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP),

364 .process_command = process_command,

365 };

flags

const SwsFlags flags[]

Definition: swscale.c:61

av_samples_copy

int av_samples_copy(uint8_t *const *dst, uint8_t *const *src, int dst_offset, int src_offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)

Copy samples from src to dst.

Definition: samplefmt.c:222

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:98

AV_SAMPLE_FMT_FLTP

@ AV_SAMPLE_FMT_FLTP

float, planar

Definition: samplefmt.h:66

ff_anlmdn_init

void ff_anlmdn_init(AudioNLMDNDSPContext *dsp)

Definition: af_anlmdn.c:114

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

filter_frame

static int filter_frame(AVFilterLink *inlink, AVFrame *in)

Definition: af_anlmdn.c:267

out

FILE * out

Definition: movenc.c:55

OUT_MODE

@ OUT_MODE

Definition: af_anlmdn.c:60

AudioNLMeansContext::window

AVFrame * window

Definition: af_anlmdn.c:53

AudioNLMDNDSPContext::compute_distance_ssd

float(* compute_distance_ssd)(const float *f1, const float *f2, ptrdiff_t K)

Definition: af_anlmdndsp.h:31

ff_filter_frame

int ff_filter_frame(AVFilterLink *link, AVFrame *frame)

Send a frame of data to the next filter.

Definition: avfilter.c:1067

int64_t

long long int64_t

Definition: coverity.c:34

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:64

OutModes

Definition: af_aap.c:32

FILTER_INPUTS

#define FILTER_INPUTS(array)

Definition: filters.h:263

AVFrame

This structure describes decoded (raw) audio or video data.

Definition: frame.h:427

AVFrame::pts

int64_t pts

Presentation timestamp in time_base units (time when frame should be shown to user).

Definition: frame.h:529

uint8_t w

Definition: llviddspenc.c:38

af_anlmdndsp.h

AVOption

AVOption.

Definition: opt.h:429

WEIGHT_LUT_SIZE

#define WEIGHT_LUT_SIZE

Definition: af_anlmdn.c:32

AV_OPT_TYPE_DURATION

@ AV_OPT_TYPE_DURATION

Underlying C type is int64_t.

Definition: opt.h:319

expf

#define expf(x)

Definition: libm.h:285

AudioNLMeansContext::N

int N

Definition: af_anlmdn.c:48

AudioNLMeansContext::S

int S

Definition: af_anlmdn.c:47

float.h

config_output

static int config_output(AVFilterLink *outlink)

Definition: af_anlmdn.c:183

AVFilter::name

const char * name

Filter name.

Definition: avfilter.h:220

AVChannelLayout::nb_channels

int nb_channels

Number of channels in this layout.

Definition: channel_layout.h:329

AudioNLMeansContext::pdiff_lut_scale

float pdiff_lut_scale

Definition: af_anlmdn.c:43

AVFilterLink

A link between two filters.

Definition: avfilter.h:395

FF_FILTER_FORWARD_STATUS_BACK

#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)

Forward the status on an output link to an input link.

Definition: filters.h:638

outputs

static const AVFilterPad outputs[]

Definition: af_anlmdn.c:344

AudioNLMeansContext::in

AVFrame * in

Definition: af_anlmdn.c:51

config_filter

static int config_filter(AVFilterContext *ctx)

Definition: af_anlmdn.c:124

#define S(s, c, i)

Definition: flacdsp_template.c:46

AVFrame::ch_layout

AVChannelLayout ch_layout

Channel layout of the audio data.

Definition: frame.h:770

ff_af_anlmdn

const FFFilter ff_af_anlmdn

Definition: af_anlmdn.c:352

pts

static int64_t pts

Definition: transcode_aac.c:644

AVFilterPad

A filter pad used for either input or output.

Definition: filters.h:39

AudioNLMeansContext::om

int om

Definition: af_anlmdn.c:41

#define Q(q)

avassert.h

av_cold

#define av_cold

Definition: attributes.h:106

anlmdn_options

static const AVOption anlmdn_options[]

Definition: af_anlmdn.c:68

NOISE_MODE

@ NOISE_MODE

Definition: af_anlmdn.c:61

FFFilter

Definition: filters.h:266

ff_outlink_set_status

static void ff_outlink_set_status(AVFilterLink *link, int status, int64_t pts)

Set the status field of a link from the source filter.

Definition: filters.h:628

ff_inlink_request_frame

void ff_inlink_request_frame(AVFilterLink *link)

Mark that a frame is wanted on the link.

Definition: avfilter.c:1620

#define s(width, name)

Definition: cbs_vp9.c:198

AudioNLMeansContext::H

int H

Definition: af_anlmdn.c:49

AVMEDIA_TYPE_AUDIO

@ AVMEDIA_TYPE_AUDIO

Definition: avutil.h:201

fminf

float fminf(float, float)

filters.h

#define P

AV_LOG_DEBUG

#define AV_LOG_DEBUG

Stuff which is only useful for libav* developers.

Definition: log.h:231

ctx

AVFormatContext * ctx

Definition: movenc.c:49

AudioNLMeansContext

Definition: af_anlmdn.c:34

AudioNLMDNDSPContext

Definition: af_anlmdndsp.h:30

FILTER_OUTPUTS

#define FILTER_OUTPUTS(array)

Definition: filters.h:264

arg

const char * arg

Definition: jacosubdec.c:67

AudioNLMeansContext::cache

AVFrame * cache

Definition: af_anlmdn.c:52

AVClass

Describe the class of an AVClass context structure.

Definition: log.h:76

AudioNLMeansContext::dsp

AudioNLMDNDSPContext dsp

Definition: af_anlmdn.c:55

ff_inlink_consume_samples

int ff_inlink_consume_samples(AVFilterLink *link, unsigned min, unsigned max, AVFrame **rframe)

Take samples from the link's FIFO and update the link's stats.

Definition: avfilter.c:1537

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:198

AVFILTER_DEFINE_CLASS

AVFILTER_DEFINE_CLASS(anlmdn)

ff_audio_default_filterpad

const AVFilterPad ff_audio_default_filterpad[1]

An AVFilterPad array whose only entry has name "default" and is of type AVMEDIA_TYPE_AUDIO.

Definition: audio.c:34

sqrtf

static __device__ float sqrtf(float a)

Definition: cuda_runtime.h:184

sqrdiff

static float sqrdiff(float x, float y)

Definition: af_anlmdn.c:87

ff_inlink_acknowledge_status

int ff_inlink_acknowledge_status(AVFilterLink *link, int *rstatus, int64_t *rpts)

Test and acknowledge the change of status on the link.

Definition: avfilter.c:1464

ff_anlmdn_init_x86

void ff_anlmdn_init_x86(AudioNLMDNDSPContext *s)

Definition: af_anlmdn_init.c:28

FILTER_SINGLE_SAMPLEFMT

#define FILTER_SINGLE_SAMPLEFMT(sample_fmt_)

Definition: filters.h:256

Definition: af_crystalizer.c:122

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

dst

uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst

Definition: dsp.h:87

AudioNLMeansContext::m

float m

Definition: af_anlmdn.c:40

uninit

static av_cold void uninit(AVFilterContext *ctx)

Definition: af_anlmdn.c:336

compute_distance_ssd_c

static float compute_distance_ssd_c(const float *f1, const float *f2, ptrdiff_t K)

Definition: af_anlmdn.c:94

AFT

#define AFT

Definition: af_anlmdn.c:66

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:32

av_frame_is_writable

int av_frame_is_writable(AVFrame *frame)

Check if the frame data is writable.

Definition: frame.c:535

AVFrame::format

int format

format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames,...

Definition: frame.h:514

AVFilterLink::src

AVFilterContext * src

source filter

Definition: avfilter.h:396

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:905

diff

static av_always_inline int diff(const struct color_info *a, const struct color_info *b, const int trans_thresh)

Definition: vf_paletteuse.c:166

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

#define H

Definition: pixlet.c:39

offset

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 offset

Definition: writing_filters.txt:86

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:324

#define N

Definition: af_mcompand.c:54

AudioNLMeansContext::rd

int64_t rd

Definition: af_anlmdn.c:39

AV_OPT_TYPE_FLOAT

@ AV_OPT_TYPE_FLOAT

Underlying C type is float.

Definition: opt.h:271

AudioNLMeansContext::weight_lut

float weight_lut[WEIGHT_LUT_SIZE]

Definition: af_anlmdn.c:44

AudioNLMeansContext::pd

int64_t pd

Definition: af_anlmdn.c:38

AVFilterLink::sample_rate

int sample_rate

samples per second

Definition: avfilter.h:421

av_assert2

#define av_assert2(cond)

assert() equivalent, that does lie in speed critical code.

Definition: avassert.h:68

AVFrame::nb_samples

int nb_samples

number of audio samples (per channel) described by this frame

Definition: frame.h:507

#define i(width, name, range_min, range_max)

Definition: cbs_h2645.c:256

AV_TIME_BASE

#define AV_TIME_BASE

Internal time base represented as integer.

Definition: avutil.h:253

AVFrame::extended_data

uint8_t ** extended_data

pointers to the data planes/channels.

Definition: frame.h:488

IN_MODE

@ IN_MODE

Definition: af_anlmdn.c:59

activate

static int activate(AVFilterContext *ctx)

Definition: af_anlmdn.c:294

AVFilterPad::name

const char * name

Pad name.

Definition: filters.h:45

ff_inlink_queued_samples

int ff_inlink_queued_samples(AVFilterLink *link)

Definition: avfilter.c:1492

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

ret

Definition: filter_design.txt:187

NB_MODES

@ NB_MODES

Definition: af_anlmdn.c:62

status

ov_status_e status

Definition: dnn_backend_openvino.c:100

ff_filter_execute

int ff_filter_execute(AVFilterContext *ctx, avfilter_action_func *func, void *arg, int *ret, int nb_jobs)

Definition: avfilter.c:1693

AV_OPT_TYPE_INT

@ AV_OPT_TYPE_INT

Underlying C type is int.

Definition: opt.h:259

avfilter.h

AVFilterContext

An instance of a filter.

Definition: avfilter.h:274

OFFSET

#define OFFSET(x)

Definition: af_anlmdn.c:65

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:104

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:167

FFFilter::p

AVFilter p

The public AVFilter.

Definition: filters.h:270

audio.h

AudioNLMeansContext::a

float a

Definition: af_anlmdn.c:37

smooth

static float smooth(DeshakeOpenCLContext *deshake_ctx, float *gauss_kernel, int length, float max_val, AVFifo *values)

Definition: vf_deshake_opencl.c:887

#define K

Definition: palette.c:25

distance

static float distance(float x, float y, int band)

Definition: nellymoserenc.c:231

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:205

av_log

#define av_log(a,...)

Definition: tableprint_vlc.h:27

ff_outlink_frame_wanted

the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the ff_outlink_frame_wanted() function. If this function returns true

AV_OPT_TYPE_CONST

@ AV_OPT_TYPE_CONST

Special option type for declaring named constants.

Definition: opt.h:299

src

#define src

Definition: vp8dsp.c:248

AudioNLMeansContext::K

int K

Definition: af_anlmdn.c:46

ff_filter_set_ready

void ff_filter_set_ready(AVFilterContext *filter, unsigned priority)

Mark a filter ready and schedule it for activation.

Definition: avfilter.c:229

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