FFmpeg
af_biquads.c
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1 /*
2  * Copyright (c) 2013 Paul B Mahol
3  * Copyright (c) 2006-2008 Rob Sykes <robs@users.sourceforge.net>
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  * 2-pole filters designed by Robert Bristow-Johnson <rbj@audioimagination.com>
24  * see http://www.musicdsp.org/files/Audio-EQ-Cookbook.txt
25  *
26  * 1-pole filters based on code (c) 2000 Chris Bagwell <cbagwell@sprynet.com>
27  * Algorithms: Recursive single pole low/high pass filter
28  * Reference: The Scientist and Engineer's Guide to Digital Signal Processing
29  *
30  * low-pass: output[N] = input[N] * A + output[N-1] * B
31  * X = exp(-2.0 * pi * Fc)
32  * A = 1 - X
33  * B = X
34  * Fc = cutoff freq / sample rate
35  *
36  * Mimics an RC low-pass filter:
37  *
38  * ---/\/\/\/\----------->
39  * |
40  * --- C
41  * ---
42  * |
43  * |
44  * V
45  *
46  * high-pass: output[N] = A0 * input[N] + A1 * input[N-1] + B1 * output[N-1]
47  * X = exp(-2.0 * pi * Fc)
48  * A0 = (1 + X) / 2
49  * A1 = -(1 + X) / 2
50  * B1 = X
51  * Fc = cutoff freq / sample rate
52  *
53  * Mimics an RC high-pass filter:
54  *
55  * || C
56  * ----||--------->
57  * || |
58  * <
59  * > R
60  * <
61  * |
62  * V
63  */
64 
65 #include "libavutil/avassert.h"
66 #include "libavutil/ffmath.h"
67 #include "libavutil/opt.h"
68 #include "audio.h"
69 #include "avfilter.h"
70 #include "internal.h"
71 
72 enum FilterType {
73  biquad,
74  equalizer,
75  bass,
76  treble,
77  bandpass,
78  bandreject,
79  allpass,
80  highpass,
81  lowpass,
82  lowshelf,
83  highshelf,
84 };
85 
86 enum WidthType {
87  NONE,
88  HERTZ,
89  OCTAVE,
90  QFACTOR,
91  SLOPE,
92  KHERTZ,
93  NB_WTYPE,
94 };
95 
96 typedef struct ChanCache {
97  double i1, i2;
98  double o1, o2;
99  int clippings;
100 } ChanCache;
101 
102 typedef struct BiquadsContext {
103  const AVClass *class;
104 
105  enum FilterType filter_type;
106  int width_type;
107  int poles;
108  int csg;
109 
110  double gain;
111  double frequency;
112  double width;
113  double mix;
114  uint64_t channels;
115  int normalize;
116 
117  double a0, a1, a2;
118  double b0, b1, b2;
119 
120  ChanCache *cache;
121  int block_align;
122 
123  void (*filter)(struct BiquadsContext *s, const void *ibuf, void *obuf, int len,
124  double *i1, double *i2, double *o1, double *o2,
125  double b0, double b1, double b2, double a1, double a2, int *clippings,
126  int disabled);
127 } BiquadsContext;
128 
129 static av_cold int init(AVFilterContext *ctx)
130 {
131  BiquadsContext *s = ctx->priv;
132 
133  if (s->filter_type != biquad) {
134  if (s->frequency <= 0 || s->width <= 0) {
135  av_log(ctx, AV_LOG_ERROR, "Invalid frequency %f and/or width %f <= 0\n",
136  s->frequency, s->width);
137  return AVERROR(EINVAL);
138  }
139  }
140 
141  return 0;
142 }
143 
144 static int query_formats(AVFilterContext *ctx)
145 {
146  AVFilterFormats *formats;
147  AVFilterChannelLayouts *layouts;
148  static const enum AVSampleFormat sample_fmts[] = {
149  AV_SAMPLE_FMT_S16P,
150  AV_SAMPLE_FMT_S32P,
151  AV_SAMPLE_FMT_FLTP,
152  AV_SAMPLE_FMT_DBLP,
153  AV_SAMPLE_FMT_NONE
154  };
155  int ret;
156 
157  layouts = ff_all_channel_counts();
158  if (!layouts)
159  return AVERROR(ENOMEM);
160  ret = ff_set_common_channel_layouts(ctx, layouts);
161  if (ret < 0)
162  return ret;
163 
164  formats = ff_make_format_list(sample_fmts);
165  if (!formats)
166  return AVERROR(ENOMEM);
167  ret = ff_set_common_formats(ctx, formats);
168  if (ret < 0)
169  return ret;
170 
171  formats = ff_all_samplerates();
172  if (!formats)
173  return AVERROR(ENOMEM);
174  return ff_set_common_samplerates(ctx, formats);
175 }
176 
177 #define BIQUAD_FILTER(name, type, min, max, need_clipping) \
178 static void biquad_## name (BiquadsContext *s, \
179  const void *input, void *output, int len, \
180  double *in1, double *in2, \
181  double *out1, double *out2, \
182  double b0, double b1, double b2, \
183  double a1, double a2, int *clippings, \
184  int disabled) \
185 { \
186  const type *ibuf = input; \
187  type *obuf = output; \
188  double i1 = *in1; \
189  double i2 = *in2; \
190  double o1 = *out1; \
191  double o2 = *out2; \
192  double wet = s->mix; \
193  double dry = 1. - wet; \
194  double out; \
195  int i; \
196  a1 = -a1; \
197  a2 = -a2; \
198  \
199  for (i = 0; i+1 < len; i++) { \
200  o2 = i2 * b2 + i1 * b1 + ibuf[i] * b0 + o2 * a2 + o1 * a1; \
201  i2 = ibuf[i]; \
202  out = o2 * wet + i2 * dry; \
203  if (disabled) { \
204  obuf[i] = i2; \
205  } else if (need_clipping && out < min) { \
206  (*clippings)++; \
207  obuf[i] = min; \
208  } else if (need_clipping && out > max) { \
209  (*clippings)++; \
210  obuf[i] = max; \
211  } else { \
212  obuf[i] = out; \
213  } \
214  i++; \
215  o1 = i1 * b2 + i2 * b1 + ibuf[i] * b0 + o1 * a2 + o2 * a1; \
216  i1 = ibuf[i]; \
217  out = o1 * wet + i1 * dry; \
218  if (disabled) { \
219  obuf[i] = i1; \
220  } else if (need_clipping && out < min) { \
221  (*clippings)++; \
222  obuf[i] = min; \
223  } else if (need_clipping && out > max) { \
224  (*clippings)++; \
225  obuf[i] = max; \
226  } else { \
227  obuf[i] = out; \
228  } \
229  } \
230  if (i < len) { \
231  double o0 = ibuf[i] * b0 + i1 * b1 + i2 * b2 + o1 * a1 + o2 * a2; \
232  i2 = i1; \
233  i1 = ibuf[i]; \
234  o2 = o1; \
235  o1 = o0; \
236  out = o0 * wet + i1 * dry; \
237  if (disabled) { \
238  obuf[i] = i1; \
239  } else if (need_clipping && out < min) { \
240  (*clippings)++; \
241  obuf[i] = min; \
242  } else if (need_clipping && out > max) { \
243  (*clippings)++; \
244  obuf[i] = max; \
245  } else { \
246  obuf[i] = out; \
247  } \
248  } \
249  *in1 = i1; \
250  *in2 = i2; \
251  *out1 = o1; \
252  *out2 = o2; \
253 }
254 
255 BIQUAD_FILTER(s16, int16_t, INT16_MIN, INT16_MAX, 1)
256 BIQUAD_FILTER(s32, int32_t, INT32_MIN, INT32_MAX, 1)
257 BIQUAD_FILTER(flt, float, -1., 1., 0)
258 BIQUAD_FILTER(dbl, double, -1., 1., 0)
259 
260 static int config_filter(AVFilterLink *outlink, int reset)
261 {
262  AVFilterContext *ctx = outlink->src;
263  BiquadsContext *s = ctx->priv;
264  AVFilterLink *inlink = ctx->inputs[0];
265  double A = ff_exp10(s->gain / 40);
266  double w0 = 2 * M_PI * s->frequency / inlink->sample_rate;
267  double alpha, beta;
268 
269  if (w0 > M_PI) {
270  av_log(ctx, AV_LOG_ERROR,
271  "Invalid frequency %f. Frequency must be less than half the sample-rate %d.\n",
272  s->frequency, inlink->sample_rate);
273  return AVERROR(EINVAL);
274  }
275 
276  switch (s->width_type) {
277  case NONE:
278  alpha = 0.0;
279  break;
280  case HERTZ:
281  alpha = sin(w0) / (2 * s->frequency / s->width);
282  break;
283  case KHERTZ:
284  alpha = sin(w0) / (2 * s->frequency / (s->width * 1000));
285  break;
286  case OCTAVE:
287  alpha = sin(w0) * sinh(log(2.) / 2 * s->width * w0 / sin(w0));
288  break;
289  case QFACTOR:
290  alpha = sin(w0) / (2 * s->width);
291  break;
292  case SLOPE:
293  alpha = sin(w0) / 2 * sqrt((A + 1 / A) * (1 / s->width - 1) + 2);
294  break;
295  default:
296  av_assert0(0);
297  }
298 
299  beta = 2 * sqrt(A);
300 
301  switch (s->filter_type) {
302  case biquad:
303  break;
304  case equalizer:
305  s->a0 = 1 + alpha / A;
306  s->a1 = -2 * cos(w0);
307  s->a2 = 1 - alpha / A;
308  s->b0 = 1 + alpha * A;
309  s->b1 = -2 * cos(w0);
310  s->b2 = 1 - alpha * A;
311  break;
312  case bass:
313  beta = sqrt((A * A + 1) - (A - 1) * (A - 1));
314  case lowshelf:
315  s->a0 = (A + 1) + (A - 1) * cos(w0) + beta * alpha;
316  s->a1 = -2 * ((A - 1) + (A + 1) * cos(w0));
317  s->a2 = (A + 1) + (A - 1) * cos(w0) - beta * alpha;
318  s->b0 = A * ((A + 1) - (A - 1) * cos(w0) + beta * alpha);
319  s->b1 = 2 * A * ((A - 1) - (A + 1) * cos(w0));
320  s->b2 = A * ((A + 1) - (A - 1) * cos(w0) - beta * alpha);
321  break;
322  case treble:
323  beta = sqrt((A * A + 1) - (A - 1) * (A - 1));
324  case highshelf:
325  s->a0 = (A + 1) - (A - 1) * cos(w0) + beta * alpha;
326  s->a1 = 2 * ((A - 1) - (A + 1) * cos(w0));
327  s->a2 = (A + 1) - (A - 1) * cos(w0) - beta * alpha;
328  s->b0 = A * ((A + 1) + (A - 1) * cos(w0) + beta * alpha);
329  s->b1 =-2 * A * ((A - 1) + (A + 1) * cos(w0));
330  s->b2 = A * ((A + 1) + (A - 1) * cos(w0) - beta * alpha);
331  break;
332  case bandpass:
333  if (s->csg) {
334  s->a0 = 1 + alpha;
335  s->a1 = -2 * cos(w0);
336  s->a2 = 1 - alpha;
337  s->b0 = sin(w0) / 2;
338  s->b1 = 0;
339  s->b2 = -sin(w0) / 2;
340  } else {
341  s->a0 = 1 + alpha;
342  s->a1 = -2 * cos(w0);
343  s->a2 = 1 - alpha;
344  s->b0 = alpha;
345  s->b1 = 0;
346  s->b2 = -alpha;
347  }
348  break;
349  case bandreject:
350  s->a0 = 1 + alpha;
351  s->a1 = -2 * cos(w0);
352  s->a2 = 1 - alpha;
353  s->b0 = 1;
354  s->b1 = -2 * cos(w0);
355  s->b2 = 1;
356  break;
357  case lowpass:
358  if (s->poles == 1) {
359  s->a0 = 1;
360  s->a1 = -exp(-w0);
361  s->a2 = 0;
362  s->b0 = 1 + s->a1;
363  s->b1 = 0;
364  s->b2 = 0;
365  } else {
366  s->a0 = 1 + alpha;
367  s->a1 = -2 * cos(w0);
368  s->a2 = 1 - alpha;
369  s->b0 = (1 - cos(w0)) / 2;
370  s->b1 = 1 - cos(w0);
371  s->b2 = (1 - cos(w0)) / 2;
372  }
373  break;
374  case highpass:
375  if (s->poles == 1) {
376  s->a0 = 1;
377  s->a1 = -exp(-w0);
378  s->a2 = 0;
379  s->b0 = (1 - s->a1) / 2;
380  s->b1 = -s->b0;
381  s->b2 = 0;
382  } else {
383  s->a0 = 1 + alpha;
384  s->a1 = -2 * cos(w0);
385  s->a2 = 1 - alpha;
386  s->b0 = (1 + cos(w0)) / 2;
387  s->b1 = -(1 + cos(w0));
388  s->b2 = (1 + cos(w0)) / 2;
389  }
390  break;
391  case allpass:
392  s->a0 = 1 + alpha;
393  s->a1 = -2 * cos(w0);
394  s->a2 = 1 - alpha;
395  s->b0 = 1 - alpha;
396  s->b1 = -2 * cos(w0);
397  s->b2 = 1 + alpha;
398  break;
399  default:
400  av_assert0(0);
401  }
402 
403  av_log(ctx, AV_LOG_VERBOSE, "a=%f %f %f:b=%f %f %f\n", s->a0, s->a1, s->a2, s->b0, s->b1, s->b2);
404 
405  s->a1 /= s->a0;
406  s->a2 /= s->a0;
407  s->b0 /= s->a0;
408  s->b1 /= s->a0;
409  s->b2 /= s->a0;
410  s->a0 /= s->a0;
411 
412  if (s->normalize && fabs(s->b0 + s->b1 + s->b2) > 1e-6) {
413  double factor = (s->a0 + s->a1 + s->a2) / (s->b0 + s->b1 + s->b2);
414 
415  s->b0 *= factor;
416  s->b1 *= factor;
417  s->b2 *= factor;
418  }
419 
420  s->cache = av_realloc_f(s->cache, sizeof(ChanCache), inlink->channels);
421  if (!s->cache)
422  return AVERROR(ENOMEM);
423  if (reset)
424  memset(s->cache, 0, sizeof(ChanCache) * inlink->channels);
425 
426  switch (inlink->format) {
427  case AV_SAMPLE_FMT_S16P: s->filter = biquad_s16; break;
428  case AV_SAMPLE_FMT_S32P: s->filter = biquad_s32; break;
429  case AV_SAMPLE_FMT_FLTP: s->filter = biquad_flt; break;
430  case AV_SAMPLE_FMT_DBLP: s->filter = biquad_dbl; break;
431  default: av_assert0(0);
432  }
433 
434  s->block_align = av_get_bytes_per_sample(inlink->format);
435 
436  return 0;
437 }
438 
439 static int config_output(AVFilterLink *outlink)
440 {
441  return config_filter(outlink, 1);
442 }
443 
444 typedef struct ThreadData {
445  AVFrame *in, *out;
446 } ThreadData;
447 
448 static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
449 {
450  AVFilterLink *inlink = ctx->inputs[0];
451  ThreadData *td = arg;
452  AVFrame *buf = td->in;
453  AVFrame *out_buf = td->out;
454  BiquadsContext *s = ctx->priv;
455  const int start = (buf->channels * jobnr) / nb_jobs;
456  const int end = (buf->channels * (jobnr+1)) / nb_jobs;
457  int ch;
458 
459  for (ch = start; ch < end; ch++) {
460  if (!((av_channel_layout_extract_channel(inlink->channel_layout, ch) & s->channels))) {
461  if (buf != out_buf)
462  memcpy(out_buf->extended_data[ch], buf->extended_data[ch],
463  buf->nb_samples * s->block_align);
464  continue;
465  }
466 
467  s->filter(s, buf->extended_data[ch], out_buf->extended_data[ch], buf->nb_samples,
468  &s->cache[ch].i1, &s->cache[ch].i2, &s->cache[ch].o1, &s->cache[ch].o2,
469  s->b0, s->b1, s->b2, s->a1, s->a2, &s->cache[ch].clippings, ctx->is_disabled);
470  }
471 
472  return 0;
473 }
474 
475 static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
476 {
477  AVFilterContext *ctx = inlink->dst;
478  BiquadsContext *s = ctx->priv;
479  AVFilterLink *outlink = ctx->outputs[0];
480  AVFrame *out_buf;
481  ThreadData td;
482  int ch;
483 
484  if (av_frame_is_writable(buf)) {
485  out_buf = buf;
486  } else {
487  out_buf = ff_get_audio_buffer(outlink, buf->nb_samples);
488  if (!out_buf) {
489  av_frame_free(&buf);
490  return AVERROR(ENOMEM);
491  }
492  av_frame_copy_props(out_buf, buf);
493  }
494 
495  td.in = buf;
496  td.out = out_buf;
497  ctx->internal->execute(ctx, filter_channel, &td, NULL, FFMIN(outlink->channels, ff_filter_get_nb_threads(ctx)));
498 
499  for (ch = 0; ch < outlink->channels; ch++) {
500  if (s->cache[ch].clippings > 0)
501  av_log(ctx, AV_LOG_WARNING, "Channel %d clipping %d times. Please reduce gain.\n",
502  ch, s->cache[ch].clippings);
503  s->cache[ch].clippings = 0;
504  }
505 
506  if (buf != out_buf)
507  av_frame_free(&buf);
508 
509  return ff_filter_frame(outlink, out_buf);
510 }
511 
512 static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
513  char *res, int res_len, int flags)
514 {
515  AVFilterLink *outlink = ctx->outputs[0];
516  int ret;
517 
518  ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
519  if (ret < 0)
520  return ret;
521 
522  return config_filter(outlink, 0);
523 }
524 
525 static av_cold void uninit(AVFilterContext *ctx)
526 {
527  BiquadsContext *s = ctx->priv;
528 
529  av_freep(&s->cache);
530 }
531 
532 static const AVFilterPad inputs[] = {
533  {
534  .name = "default",
535  .type = AVMEDIA_TYPE_AUDIO,
536  .filter_frame = filter_frame,
537  },
538  { NULL }
539 };
540 
541 static const AVFilterPad outputs[] = {
542  {
543  .name = "default",
544  .type = AVMEDIA_TYPE_AUDIO,
545  .config_props = config_output,
546  },
547  { NULL }
548 };
549 
550 #define OFFSET(x) offsetof(BiquadsContext, x)
551 #define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
552 #define AF AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
553 
554 #define DEFINE_BIQUAD_FILTER(name_, description_) \
555 AVFILTER_DEFINE_CLASS(name_); \
556 static av_cold int name_##_init(AVFilterContext *ctx) \
557 { \
558  BiquadsContext *s = ctx->priv; \
559  s->class = &name_##_class; \
560  s->filter_type = name_; \
561  return init(ctx); \
562 } \
563  \
564 AVFilter ff_af_##name_ = { \
565  .name = #name_, \
566  .description = NULL_IF_CONFIG_SMALL(description_), \
567  .priv_size = sizeof(BiquadsContext), \
568  .init = name_##_init, \
569  .uninit = uninit, \
570  .query_formats = query_formats, \
571  .inputs = inputs, \
572  .outputs = outputs, \
573  .priv_class = &name_##_class, \
574  .process_command = process_command, \
575  .flags = AVFILTER_FLAG_SLICE_THREADS | AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, \
576 }
577 
578 #if CONFIG_EQUALIZER_FILTER
579 static const AVOption equalizer_options[] = {
580  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 999999, FLAGS},
581  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=0}, 0, 999999, FLAGS},
582  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
583  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
584  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
585  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
586  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
587  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
588  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
589  {"width", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 99999, FLAGS},
590  {"w", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 99999, FLAGS},
591  {"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
592  {"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
593  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
594  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
595  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
596  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
597  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
598  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
599  {NULL}
600 };
601 
602 DEFINE_BIQUAD_FILTER(equalizer, "Apply two-pole peaking equalization (EQ) filter.");
603 #endif /* CONFIG_EQUALIZER_FILTER */
604 #if CONFIG_BASS_FILTER
605 static const AVOption bass_options[] = {
606  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
607  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
608  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
609  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
610  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
611  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
612  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
613  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
614  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
615  {"width", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
616  {"w", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
617  {"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
618  {"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
619  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
620  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
621  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
622  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
623  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
624  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
625  {NULL}
626 };
627 
628 DEFINE_BIQUAD_FILTER(bass, "Boost or cut lower frequencies.");
629 #endif /* CONFIG_BASS_FILTER */
630 #if CONFIG_TREBLE_FILTER
631 static const AVOption treble_options[] = {
632  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
633  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
634  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
635  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
636  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
637  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
638  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
639  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
640  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
641  {"width", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
642  {"w", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
643  {"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
644  {"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
645  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
646  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
647  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
648  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
649  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
650  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
651  {NULL}
652 };
653 
654 DEFINE_BIQUAD_FILTER(treble, "Boost or cut upper frequencies.");
655 #endif /* CONFIG_TREBLE_FILTER */
656 #if CONFIG_BANDPASS_FILTER
657 static const AVOption bandpass_options[] = {
658  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
659  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
660  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
661  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
662  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
663  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
664  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
665  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
666  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
667  {"width", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
668  {"w", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
669  {"csg", "use constant skirt gain", OFFSET(csg), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
670  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
671  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
672  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
673  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
674  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
675  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
676  {NULL}
677 };
678 
679 DEFINE_BIQUAD_FILTER(bandpass, "Apply a two-pole Butterworth band-pass filter.");
680 #endif /* CONFIG_BANDPASS_FILTER */
681 #if CONFIG_BANDREJECT_FILTER
682 static const AVOption bandreject_options[] = {
683  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
684  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
685  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
686  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
687  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
688  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
689  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
690  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
691  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
692  {"width", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
693  {"w", "set band-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
694  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
695  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
696  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
697  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
698  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
699  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
700  {NULL}
701 };
702 
703 DEFINE_BIQUAD_FILTER(bandreject, "Apply a two-pole Butterworth band-reject filter.");
704 #endif /* CONFIG_BANDREJECT_FILTER */
705 #if CONFIG_LOWPASS_FILTER
706 static const AVOption lowpass_options[] = {
707  {"frequency", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=500}, 0, 999999, FLAGS},
708  {"f", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=500}, 0, 999999, FLAGS},
709  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
710  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
711  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
712  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
713  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
714  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
715  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
716  {"width", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
717  {"w", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
718  {"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
719  {"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
720  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
721  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
722  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
723  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
724  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
725  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
726  {NULL}
727 };
728 
729 DEFINE_BIQUAD_FILTER(lowpass, "Apply a low-pass filter with 3dB point frequency.");
730 #endif /* CONFIG_LOWPASS_FILTER */
731 #if CONFIG_HIGHPASS_FILTER
732 static const AVOption highpass_options[] = {
733  {"frequency", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
734  {"f", "set frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
735  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
736  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
737  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
738  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
739  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
740  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
741  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
742  {"width", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
743  {"w", "set width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.707}, 0, 99999, FLAGS},
744  {"poles", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
745  {"p", "set number of poles", OFFSET(poles), AV_OPT_TYPE_INT, {.i64=2}, 1, 2, AF},
746  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
747  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
748  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
749  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
750  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
751  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
752  {NULL}
753 };
754 
755 DEFINE_BIQUAD_FILTER(highpass, "Apply a high-pass filter with 3dB point frequency.");
756 #endif /* CONFIG_HIGHPASS_FILTER */
757 #if CONFIG_ALLPASS_FILTER
758 static const AVOption allpass_options[] = {
759  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
760  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
761  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=HERTZ}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
762  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=HERTZ}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
763  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
764  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
765  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
766  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
767  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
768  {"width", "set filter-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=707.1}, 0, 99999, FLAGS},
769  {"w", "set filter-width", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=707.1}, 0, 99999, FLAGS},
770  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
771  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
772  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
773  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
774  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
775  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
776  {NULL}
777 };
778 
779 DEFINE_BIQUAD_FILTER(allpass, "Apply a two-pole all-pass filter.");
780 #endif /* CONFIG_ALLPASS_FILTER */
781 #if CONFIG_LOWSHELF_FILTER
782 static const AVOption lowshelf_options[] = {
783  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
784  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=100}, 0, 999999, FLAGS},
785  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
786  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
787  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
788  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
789  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
790  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
791  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
792  {"width", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
793  {"w", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
794  {"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
795  {"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
796  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
797  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
798  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
799  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
800  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
801  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
802  {NULL}
803 };
804 
805 DEFINE_BIQUAD_FILTER(lowshelf, "Apply a low shelf filter.");
806 #endif /* CONFIG_LOWSHELF_FILTER */
807 #if CONFIG_HIGHSHELF_FILTER
808 static const AVOption highshelf_options[] = {
809  {"frequency", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
810  {"f", "set central frequency", OFFSET(frequency), AV_OPT_TYPE_DOUBLE, {.dbl=3000}, 0, 999999, FLAGS},
811  {"width_type", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
812  {"t", "set filter-width type", OFFSET(width_type), AV_OPT_TYPE_INT, {.i64=QFACTOR}, HERTZ, NB_WTYPE-1, FLAGS, "width_type"},
813  {"h", "Hz", 0, AV_OPT_TYPE_CONST, {.i64=HERTZ}, 0, 0, FLAGS, "width_type"},
814  {"q", "Q-Factor", 0, AV_OPT_TYPE_CONST, {.i64=QFACTOR}, 0, 0, FLAGS, "width_type"},
815  {"o", "octave", 0, AV_OPT_TYPE_CONST, {.i64=OCTAVE}, 0, 0, FLAGS, "width_type"},
816  {"s", "slope", 0, AV_OPT_TYPE_CONST, {.i64=SLOPE}, 0, 0, FLAGS, "width_type"},
817  {"k", "kHz", 0, AV_OPT_TYPE_CONST, {.i64=KHERTZ}, 0, 0, FLAGS, "width_type"},
818  {"width", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
819  {"w", "set shelf transition steep", OFFSET(width), AV_OPT_TYPE_DOUBLE, {.dbl=0.5}, 0, 99999, FLAGS},
820  {"gain", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
821  {"g", "set gain", OFFSET(gain), AV_OPT_TYPE_DOUBLE, {.dbl=0}, -900, 900, FLAGS},
822  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
823  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
824  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
825  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
826  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
827  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
828  {NULL}
829 };
830 
831 DEFINE_BIQUAD_FILTER(highshelf, "Apply a high shelf filter.");
832 #endif /* CONFIG_HIGHSHELF_FILTER */
833 #if CONFIG_BIQUAD_FILTER
834 static const AVOption biquad_options[] = {
835  {"a0", NULL, OFFSET(a0), AV_OPT_TYPE_DOUBLE, {.dbl=1}, INT32_MIN, INT32_MAX, FLAGS},
836  {"a1", NULL, OFFSET(a1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
837  {"a2", NULL, OFFSET(a2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
838  {"b0", NULL, OFFSET(b0), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
839  {"b1", NULL, OFFSET(b1), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
840  {"b2", NULL, OFFSET(b2), AV_OPT_TYPE_DOUBLE, {.dbl=0}, INT32_MIN, INT32_MAX, FLAGS},
841  {"mix", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
842  {"m", "set mix", OFFSET(mix), AV_OPT_TYPE_DOUBLE, {.dbl=1}, 0, 1, FLAGS},
843  {"channels", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
844  {"c", "set channels to filter", OFFSET(channels), AV_OPT_TYPE_CHANNEL_LAYOUT, {.i64=-1}, INT64_MIN, INT64_MAX, FLAGS},
845  {"normalize", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
846  {"n", "normalize coefficients", OFFSET(normalize), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS},
847  {NULL}
848 };
849 
850 DEFINE_BIQUAD_FILTER(biquad, "Apply a biquad IIR filter with the given coefficients.");
851 #endif /* CONFIG_BIQUAD_FILTER */
AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
NULL
#define NULL
Definition: coverity.c:32
ff_set_common_channel_layouts
int ff_set_common_channel_layouts(AVFilterContext *ctx, AVFilterChannelLayouts *layouts)
A helper for query_formats() which sets all links to the same list of channel layouts/sample rates...
Definition: formats.c:581
ThreadData::out
AVFrame * out
Definition: af_adeclick.c:494
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
av_realloc_f
#define av_realloc_f(p, o, n)
Definition: tableprint_vlc.h:33
AVOption
AVOption.
Definition: opt.h:246
BiquadsContext::cache
ChanCache * cache
Definition: af_biquads.c:120
bandpass
Definition: af_biquads.c:77
ret
ret
Definition: filter_design.txt:187
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
avfilter.h
Main libavfilter public API header.
AV_OPT_TYPE_INT
Definition: opt.h:223
ChanCache::i2
double i2
Definition: af_biquads.c:97
a0
#define a0
Definition: regdef.h:46
highshelf
Definition: af_biquads.c:83
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
AV_SAMPLE_FMT_DBLP
double, planar
Definition: samplefmt.h:70
a1
#define a1
Definition: regdef.h:47
QFACTOR
Definition: af_biquads.c:90
inputs
static const AVFilterPad inputs[]
Definition: af_biquads.c:532
AVFilterContext::is_disabled
int is_disabled
the enabled state from the last expression evaluation
Definition: avfilter.h:385
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
biquad
Definition: af_biquads.c:73
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
lowshelf
Definition: af_biquads.c:82
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
FilterType
FilterType
Definition: af_anequalizer.c:33
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_OPT_TYPE_CONST
Definition: opt.h:232
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1075
OFFSET
#define OFFSET(x)
Definition: af_biquads.c:550
av_cold
#define av_cold
Definition: attributes.h:88
opt.h
AVOptions.
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
BiquadsContext::filter
void(* filter)(struct BiquadsContext *s, const void *ibuf, void *obuf, int len, double *i1, double *i2, double *o1, double *o2, double b0, double b1, double b2, double a1, double a2, int *clippings, int disabled)
Definition: af_biquads.c:123
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
channels
channels
Definition: aptx.h:33
A
#define A(x)
Definition: vp56_arith.h:28
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_OPT_TYPE_CHANNEL_LAYOUT
Definition: opt.h:239
outputs
static const AVFilterPad outputs[]
Definition: af_biquads.c:541
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
init
static av_cold int init(AVFilterContext *ctx)
Definition: af_biquads.c:129
ff_exp10
static av_always_inline double ff_exp10(double x)
Compute 10^x for floating point values.
Definition: ffmath.h:42
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
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:600
td
#define td
Definition: regdef.h:70
FLAGS
#define FLAGS
Definition: af_biquads.c:551
treble
Definition: af_biquads.c:76
filter
filter_frame For filters that do not use the this method is called when a frame is pushed to the filter s input It can be called at any time except in a reentrant way If the input frame is enough to produce then the filter should push the output frames on the output link immediately As an exception to the previous rule if the input frame is enough to produce several output frames then the filter needs output only at least one per link The additional frames can be left buffered in the filter
Definition: filter_design.txt:228
KHERTZ
Definition: af_biquads.c:92
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_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
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:869
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:353
arg
const char * arg
Definition: jacosubdec.c:66
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
BiquadsContext::channels
uint64_t channels
Definition: af_biquads.c:114
exp
int8_t exp
Definition: eval.c:72
ChanCache::o1
double o1
Definition: af_biquads.c:98
HERTZ
Definition: af_biquads.c:88
AVFrame::channels
int channels
number of audio channels, only used for audio.
Definition: frame.h:606
ff_filter_get_nb_threads
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Definition: avfilter.c:784
NONE
Definition: af_biquads.c:87
FFMIN
#define FFMIN(a, b)
Definition: common.h:96
AV_SAMPLE_FMT_S32P
signed 32 bits, planar
Definition: samplefmt.h:68
width
#define width
void
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int32_t
int32_t
Definition: audio_convert.c:194
ctx
AVFormatContext * ctx
Definition: movenc.c:48
a2
#define a2
Definition: regdef.h:48
AV_OPT_TYPE_BOOL
Definition: opt.h:240
b0
static double b0(void *priv, double x, double y)
Definition: vf_xfade.c:1331
s
#define s(width, name)
Definition: cbs_vp9.c:257
allpass
Definition: af_biquads.c:79
SLOPE
Definition: af_biquads.c:91
NB_WTYPE
Definition: af_biquads.c:93
highpass
Definition: af_biquads.c:80
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
b1
static double b1(void *priv, double x, double y)
Definition: vf_xfade.c:1332
mix
static int mix(int c0, int c1)
Definition: 4xm.c:714
AV_OPT_TYPE_DOUBLE
Definition: opt.h:225
BIQUAD_FILTER
#define BIQUAD_FILTER(name, type, min, max, need_clipping)
Definition: af_biquads.c:177
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
filter_channel
static int filter_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: af_biquads.c:448
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:595
ThreadData
Used for passing data between threads.
Definition: dsddec.c:67
config_output
static int config_output(AVFilterLink *outlink)
Definition: af_biquads.c:439
alpha
static const int16_t alpha[]
Definition: ilbcdata.h:55
bass
Definition: af_biquads.c:75
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31))))#define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac){}void ff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map){AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);return NULL;}return ac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;}int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){int use_generic=1;int len=in->nb_samples;int p;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
Definition: audio_convert.c:194
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
DEFINE_BIQUAD_FILTER
#define DEFINE_BIQUAD_FILTER(name_, description_)
Definition: af_biquads.c:554
factor
static const int factor[16]
Definition: vf_pp7.c:75
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: af_biquads.c:144
equalizer
Definition: af_biquads.c:74
ChanCache::o2
double o2
Definition: af_biquads.c:98
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
ch
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(const uint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(const uint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(const int16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(const int16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(const int32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(const int32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(const int64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0f/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(const int64_t *) pi *(1.0/(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(const float *) pi *(UINT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(const double *) pi *(UINT64_C(1)<< 63)))#define FMT_PAIR_FUNC(out, in) static conv_func_type *const fmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};static void cpy1(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, len);}static void cpy2(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 2 *len);}static void cpy4(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 4 *len);}static void cpy8(uint8_t **dst, const uint8_t **src, int len){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, const int *ch_map, int flags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) return NULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) return NULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case 1:ctx->simd_f=cpy1;break;case 2:ctx->simd_f=cpy2;break;case 4:ctx->simd_f=cpy4;break;case 8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);return ctx;}void swri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}int swri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, int len){int ch;int off=0;const int os=(out->planar?1:out->ch_count)*out->bps;unsigned misaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){int planes=in->planar?in->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){int planes=out->planar?out->ch_count:1;unsigned m=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){int planes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:425
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:564
AVFilterContext::internal
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: af_biquads.c:525
av_get_bytes_per_sample
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
Definition: samplefmt.c:106
ChanCache::clippings
int clippings
Definition: af_biquads.c:99
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:207
ffmath.h
internal math functions header
lowpass
Definition: af_biquads.c:81
av_channel_layout_extract_channel
uint64_t av_channel_layout_extract_channel(uint64_t channel_layout, int index)
Get the channel with the given index in channel_layout.
Definition: channel_layout.c:265
AVFilterInternal::execute
avfilter_execute_func * execute
Definition: internal.h:144
config_filter
static int config_filter(AVFilterLink *outlink, int reset)
Definition: af_biquads.c:260
WidthType
WidthType
Definition: af_biquads.c:86
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
Definition: af_biquads.c:475
len
int len
Definition: vorbis_enc_data.h:452
AF
#define AF
Definition: af_biquads.c:552
ChanCache::i1
double i1
Definition: af_biquads.c:97
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:731
out
FILE * out
Definition: movenc.c:54
process_command
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
Definition: af_biquads.c:512
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
BiquadsContext::frequency
double frequency
Definition: af_biquads.c:111
M_PI
#define M_PI
Definition: mathematics.h:52
bandreject
Definition: af_biquads.c:78
ThreadData::in
AVFrame * in
Definition: af_afftdn.c:1083
formats
formats
Definition: signature.h:48
internal.h
internal API functions
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
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:440
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:347
BiquadsContext::filter_type
enum FilterType filter_type
Definition: af_biquads.c:105
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:366
ff_set_common_samplerates
int ff_set_common_samplerates(AVFilterContext *ctx, AVFilterFormats *samplerates)
Definition: formats.c:588
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:659
OCTAVE
Definition: af_biquads.c:89
b2
static double b2(void *priv, double x, double y)
Definition: vf_xfade.c:1333
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