FFmpeg  4.4.5
avf_showfreqs.c
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1 /*
2  * Copyright (c) 2015 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 #include <math.h>
23 
24 #include "libavcodec/avfft.h"
25 #include "libavutil/audio_fifo.h"
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/parseutils.h"
32 #include "audio.h"
33 #include "filters.h"
34 #include "video.h"
35 #include "avfilter.h"
36 #include "internal.h"
37 #include "window_func.h"
38 
44 
45 typedef struct ShowFreqsContext {
46  const AVClass *class;
47  int w, h;
48  int mode;
49  int data_mode;
50  int cmode;
51  int fft_size;
52  int fft_bits;
53  int ascale, fscale;
54  int avg;
55  int win_func;
58  float **avg_data;
60  float overlap;
61  float minamp;
62  int hop_size;
64  int nb_freq;
65  int win_size;
66  float scale;
67  char *colors;
71 
72 #define OFFSET(x) offsetof(ShowFreqsContext, x)
73 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
74 
75 static const AVOption showfreqs_options[] = {
76  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "1024x512"}, 0, 0, FLAGS },
77  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "1024x512"}, 0, 0, FLAGS },
78  { "mode", "set display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=BAR}, 0, NB_MODES-1, FLAGS, "mode" },
79  { "line", "show lines", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, "mode" },
80  { "bar", "show bars", 0, AV_OPT_TYPE_CONST, {.i64=BAR}, 0, 0, FLAGS, "mode" },
81  { "dot", "show dots", 0, AV_OPT_TYPE_CONST, {.i64=DOT}, 0, 0, FLAGS, "mode" },
82  { "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=AS_LOG}, 0, NB_ASCALES-1, FLAGS, "ascale" },
83  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=AS_LINEAR}, 0, 0, FLAGS, "ascale" },
84  { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=AS_SQRT}, 0, 0, FLAGS, "ascale" },
85  { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=AS_CBRT}, 0, 0, FLAGS, "ascale" },
86  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=AS_LOG}, 0, 0, FLAGS, "ascale" },
87  { "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=FS_LINEAR}, 0, NB_FSCALES-1, FLAGS, "fscale" },
88  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=FS_LINEAR}, 0, 0, FLAGS, "fscale" },
89  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=FS_LOG}, 0, 0, FLAGS, "fscale" },
90  { "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=FS_RLOG}, 0, 0, FLAGS, "fscale" },
91  { "win_size", "set window size", OFFSET(fft_size), AV_OPT_TYPE_INT, {.i64=2048}, 16, 65536, FLAGS },
92  { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64=WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
93  { "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" },
94  { "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },
95  { "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
96  { "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" },
97  { "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
98  { "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" },
99  { "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" },
100  { "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" },
101  { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" },
102  { "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" },
103  { "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" },
104  { "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" },
105  { "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" },
106  { "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" },
107  { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" },
108  { "dolph", "Dolph-Chebyshev", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_DOLPH}, 0, 0, FLAGS, "win_func" },
109  { "cauchy", "Cauchy", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_CAUCHY}, 0, 0, FLAGS, "win_func" },
110  { "parzen", "Parzen", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_PARZEN}, 0, 0, FLAGS, "win_func" },
111  { "poisson", "Poisson", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_POISSON}, 0, 0, FLAGS, "win_func" },
112  { "bohman", "Bohman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BOHMAN} , 0, 0, FLAGS, "win_func" },
113  { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=1.}, 0., 1., FLAGS },
114  { "averaging", "set time averaging", OFFSET(avg), AV_OPT_TYPE_INT, {.i64=1}, 0, INT32_MAX, FLAGS },
115  { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
116  { "cmode", "set channel mode", OFFSET(cmode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_CMODES-1, FLAGS, "cmode" },
117  { "combined", "show all channels in same window", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "cmode" },
118  { "separate", "show each channel in own window", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "cmode" },
119  { "minamp", "set minimum amplitude", OFFSET(minamp), AV_OPT_TYPE_FLOAT, {.dbl=1e-6}, FLT_MIN, 1e-6, FLAGS },
120  { "data", "set data mode", OFFSET(data_mode), AV_OPT_TYPE_INT, {.i64=MAGNITUDE}, 0, NB_DATA-1, FLAGS, "data" },
121  { "magnitude", "show magnitude", 0, AV_OPT_TYPE_CONST, {.i64=MAGNITUDE}, 0, 0, FLAGS, "data" },
122  { "phase", "show phase", 0, AV_OPT_TYPE_CONST, {.i64=PHASE}, 0, 0, FLAGS, "data" },
123  { "delay", "show group delay",0, AV_OPT_TYPE_CONST, {.i64=DELAY}, 0, 0, FLAGS, "data" },
124  { NULL }
125 };
126 
128 
130 {
133  AVFilterLink *inlink = ctx->inputs[0];
134  AVFilterLink *outlink = ctx->outputs[0];
136  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
137  int ret;
138 
139  /* set input audio formats */
141  if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
142  return ret;
143 
145  if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
146  return ret;
147 
149  if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
150  return ret;
151 
152  /* set output video format */
154  if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
155  return ret;
156 
157  return 0;
158 }
159 
161 {
162  ShowFreqsContext *s = ctx->priv;
163 
164  s->pts = AV_NOPTS_VALUE;
165 
166  return 0;
167 }
168 
169 static int config_output(AVFilterLink *outlink)
170 {
171  AVFilterContext *ctx = outlink->src;
172  AVFilterLink *inlink = ctx->inputs[0];
173  ShowFreqsContext *s = ctx->priv;
174  float overlap;
175  int i;
176 
177  s->fft_bits = av_log2(s->fft_size);
178  s->nb_freq = 1 << (s->fft_bits - 1);
179  s->win_size = s->nb_freq << 1;
180  av_audio_fifo_free(s->fifo);
181  av_fft_end(s->fft);
182  s->fft = av_fft_init(s->fft_bits, 0);
183  if (!s->fft) {
184  av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
185  "The window size might be too high.\n");
186  return AVERROR(ENOMEM);
187  }
188 
189  /* FFT buffers: x2 for each (display) channel buffer.
190  * Note: we use free and malloc instead of a realloc-like function to
191  * make sure the buffer is aligned in memory for the FFT functions. */
192  for (i = 0; i < s->nb_channels; i++) {
193  av_freep(&s->fft_data[i]);
194  av_freep(&s->avg_data[i]);
195  }
196  av_freep(&s->fft_data);
197  av_freep(&s->avg_data);
198  s->nb_channels = inlink->channels;
199 
200  s->fft_data = av_calloc(s->nb_channels, sizeof(*s->fft_data));
201  if (!s->fft_data)
202  return AVERROR(ENOMEM);
203  s->avg_data = av_calloc(s->nb_channels, sizeof(*s->avg_data));
204  if (!s->avg_data)
205  return AVERROR(ENOMEM);
206  for (i = 0; i < s->nb_channels; i++) {
207  s->fft_data[i] = av_calloc(s->win_size, sizeof(**s->fft_data));
208  s->avg_data[i] = av_calloc(s->nb_freq, sizeof(**s->avg_data));
209  if (!s->fft_data[i] || !s->avg_data[i])
210  return AVERROR(ENOMEM);
211  }
212 
213  /* pre-calc windowing function */
214  s->window_func_lut = av_realloc_f(s->window_func_lut, s->win_size,
215  sizeof(*s->window_func_lut));
216  if (!s->window_func_lut)
217  return AVERROR(ENOMEM);
218  generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
219  if (s->overlap == 1.)
220  s->overlap = overlap;
221  s->hop_size = (1. - s->overlap) * s->win_size;
222  if (s->hop_size < 1) {
223  av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
224  return AVERROR(EINVAL);
225  }
226 
227  for (s->scale = 0, i = 0; i < s->win_size; i++) {
228  s->scale += s->window_func_lut[i] * s->window_func_lut[i];
229  }
230 
231  outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap));
232  outlink->sample_aspect_ratio = (AVRational){1,1};
233  outlink->w = s->w;
234  outlink->h = s->h;
235 
236  s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->win_size);
237  if (!s->fifo)
238  return AVERROR(ENOMEM);
239  return 0;
240 }
241 
242 static inline void draw_dot(AVFrame *out, int x, int y, uint8_t fg[4])
243 {
244 
245  uint32_t color = AV_RL32(out->data[0] + y * out->linesize[0] + x * 4);
246 
247  if ((color & 0xffffff) != 0)
248  AV_WL32(out->data[0] + y * out->linesize[0] + x * 4, AV_RL32(fg) | color);
249  else
250  AV_WL32(out->data[0] + y * out->linesize[0] + x * 4, AV_RL32(fg));
251 }
252 
253 static int get_sx(ShowFreqsContext *s, int f)
254 {
255  switch (s->fscale) {
256  case FS_LINEAR:
257  return (s->w/(float)s->nb_freq)*f;
258  case FS_LOG:
259  return s->w-pow(s->w, (s->nb_freq-f-1)/(s->nb_freq-1.));
260  case FS_RLOG:
261  return pow(s->w, f/(s->nb_freq-1.));
262  }
263 
264  return 0;
265 }
266 
267 static float get_bsize(ShowFreqsContext *s, int f)
268 {
269  switch (s->fscale) {
270  case FS_LINEAR:
271  return s->w/(float)s->nb_freq;
272  case FS_LOG:
273  return pow(s->w, (s->nb_freq-f-1)/(s->nb_freq-1.))-
274  pow(s->w, (s->nb_freq-f-2)/(s->nb_freq-1.));
275  case FS_RLOG:
276  return pow(s->w, (f+1)/(s->nb_freq-1.))-
277  pow(s->w, f /(s->nb_freq-1.));
278  }
279 
280  return 1.;
281 }
282 
283 static inline void plot_freq(ShowFreqsContext *s, int ch,
284  double a, int f, uint8_t fg[4], int *prev_y,
285  AVFrame *out, AVFilterLink *outlink)
286 {
287  const int w = s->w;
288  const float min = s->minamp;
289  const float avg = s->avg_data[ch][f];
290  const float bsize = get_bsize(s, f);
291  const int sx = get_sx(s, f);
292  int end = outlink->h;
293  int x, y, i;
294 
295  switch(s->ascale) {
296  case AS_SQRT:
297  a = 1.0 - sqrt(a);
298  break;
299  case AS_CBRT:
300  a = 1.0 - cbrt(a);
301  break;
302  case AS_LOG:
303  a = log(av_clipd(a, min, 1)) / log(min);
304  break;
305  case AS_LINEAR:
306  a = 1.0 - a;
307  break;
308  }
309 
310  switch (s->cmode) {
311  case COMBINED:
312  y = a * outlink->h - 1;
313  break;
314  case SEPARATE:
315  end = (outlink->h / s->nb_channels) * (ch + 1);
316  y = (outlink->h / s->nb_channels) * ch + a * (outlink->h / s->nb_channels) - 1;
317  break;
318  default:
319  av_assert0(0);
320  }
321  if (y < 0)
322  return;
323 
324  switch (s->avg) {
325  case 0:
326  y = s->avg_data[ch][f] = !outlink->frame_count_in ? y : FFMIN(avg, y);
327  break;
328  case 1:
329  break;
330  default:
331  s->avg_data[ch][f] = avg + y * (y - avg) / (FFMIN(outlink->frame_count_in + 1, s->avg) * y);
332  y = s->avg_data[ch][f];
333  break;
334  }
335 
336  switch(s->mode) {
337  case LINE:
338  if (*prev_y == -1) {
339  *prev_y = y;
340  }
341  if (y <= *prev_y) {
342  for (x = sx + 1; x < sx + bsize && x < w; x++)
343  draw_dot(out, x, y, fg);
344  for (i = y; i <= *prev_y; i++)
345  draw_dot(out, sx, i, fg);
346  } else {
347  for (i = *prev_y; i <= y; i++)
348  draw_dot(out, sx, i, fg);
349  for (x = sx + 1; x < sx + bsize && x < w; x++)
350  draw_dot(out, x, i - 1, fg);
351  }
352  *prev_y = y;
353  break;
354  case BAR:
355  for (x = sx; x < sx + bsize && x < w; x++)
356  for (i = y; i < end; i++)
357  draw_dot(out, x, i, fg);
358  break;
359  case DOT:
360  for (x = sx; x < sx + bsize && x < w; x++)
361  draw_dot(out, x, y, fg);
362  break;
363  }
364 }
365 
366 static int plot_freqs(AVFilterLink *inlink, AVFrame *in)
367 {
368  AVFilterContext *ctx = inlink->dst;
369  AVFilterLink *outlink = ctx->outputs[0];
370  ShowFreqsContext *s = ctx->priv;
371  const int win_size = s->win_size;
372  char *colors, *color, *saveptr = NULL;
373  AVFrame *out;
374  int ch, n;
375 
376  out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
377  if (!out)
378  return AVERROR(ENOMEM);
379 
380  for (n = 0; n < outlink->h; n++)
381  memset(out->data[0] + out->linesize[0] * n, 0, outlink->w * 4);
382 
383  /* fill FFT input with the number of samples available */
384  for (ch = 0; ch < s->nb_channels; ch++) {
385  const float *p = (float *)in->extended_data[ch];
386 
387  for (n = 0; n < in->nb_samples; n++) {
388  s->fft_data[ch][n].re = p[n] * s->window_func_lut[n];
389  s->fft_data[ch][n].im = 0;
390  }
391  for (; n < win_size; n++) {
392  s->fft_data[ch][n].re = 0;
393  s->fft_data[ch][n].im = 0;
394  }
395  }
396 
397  /* run FFT on each samples set */
398  for (ch = 0; ch < s->nb_channels; ch++) {
399  av_fft_permute(s->fft, s->fft_data[ch]);
400  av_fft_calc(s->fft, s->fft_data[ch]);
401  }
402 
403 #define RE(x, ch) s->fft_data[ch][x].re
404 #define IM(x, ch) s->fft_data[ch][x].im
405 #define M(a, b) (sqrt((a) * (a) + (b) * (b)))
406 #define P(a, b) (atan2((b), (a)))
407 
408  colors = av_strdup(s->colors);
409  if (!colors) {
410  av_frame_free(&out);
411  return AVERROR(ENOMEM);
412  }
413 
414  for (ch = 0; ch < s->nb_channels; ch++) {
415  uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
416  int prev_y = -1, f;
417  double a;
418 
419  color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
420  if (color)
421  av_parse_color(fg, color, -1, ctx);
422 
423  switch (s->data_mode) {
424  case MAGNITUDE:
425  a = av_clipd(M(RE(0, ch), 0) / s->scale, 0, 1);
426  plot_freq(s, ch, a, 0, fg, &prev_y, out, outlink);
427 
428  for (f = 1; f < s->nb_freq; f++) {
429  a = av_clipd(M(RE(f, ch), IM(f, ch)) / s->scale, 0, 1);
430 
431  plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
432  }
433  break;
434  case PHASE:
435  a = av_clipd((M_PI + P(RE(0, ch), 0)) / (2. * M_PI), 0, 1);
436  plot_freq(s, ch, a, 0, fg, &prev_y, out, outlink);
437 
438  for (f = 1; f < s->nb_freq; f++) {
439  a = av_clipd((M_PI + P(RE(f, ch), IM(f, ch))) / (2. * M_PI), 0, 1);
440 
441  plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
442  }
443  break;
444  case DELAY:
445  plot_freq(s, ch, 0, 0, fg, &prev_y, out, outlink);
446 
447  for (f = 1; f < s->nb_freq; f++) {
448  a = av_clipd((M_PI - P(IM(f, ch) * RE(f-1, ch) - IM(f-1, ch) * RE(f, ch),
449  RE(f, ch) * RE(f-1, ch) + IM(f, ch) * IM(f-1, ch))) / (2. * M_PI), 0, 1);
450 
451  plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
452  }
453  break;
454  }
455  }
456 
457  av_free(colors);
458  out->pts = in->pts;
459  out->sample_aspect_ratio = (AVRational){1,1};
460  return ff_filter_frame(outlink, out);
461 }
462 
463 static int filter_frame(AVFilterLink *inlink)
464 {
465  AVFilterContext *ctx = inlink->dst;
466  ShowFreqsContext *s = ctx->priv;
467  AVFrame *fin = NULL;
468  int ret = 0;
469 
470  fin = ff_get_audio_buffer(inlink, s->win_size);
471  if (!fin) {
472  ret = AVERROR(ENOMEM);
473  goto fail;
474  }
475 
476  fin->pts = s->pts;
477  s->pts += s->hop_size;
478  ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
479  if (ret < 0)
480  goto fail;
481 
482  ret = plot_freqs(inlink, fin);
483  av_frame_free(&fin);
484  av_audio_fifo_drain(s->fifo, s->hop_size);
485 
486 fail:
487  av_frame_free(&fin);
488  return ret;
489 }
490 
492 {
493  AVFilterLink *inlink = ctx->inputs[0];
494  AVFilterLink *outlink = ctx->outputs[0];
495  ShowFreqsContext *s = ctx->priv;
496  AVFrame *in = NULL;
497  int ret = 0;
498 
499  FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
500 
501  if (av_audio_fifo_size(s->fifo) < s->win_size)
502  ret = ff_inlink_consume_samples(inlink, s->win_size, s->win_size, &in);
503  if (ret < 0)
504  return ret;
505  if (ret > 0) {
506  av_audio_fifo_write(s->fifo, (void **)in->extended_data, in->nb_samples);
507  if (s->pts == AV_NOPTS_VALUE)
508  s->pts = in->pts;
509  av_frame_free(&in);
510  }
511 
512  if (av_audio_fifo_size(s->fifo) >= s->win_size) {
513  ret = filter_frame(inlink);
514  if (ret <= 0)
515  return ret;
516  }
517 
518  FF_FILTER_FORWARD_STATUS(inlink, outlink);
519  FF_FILTER_FORWARD_WANTED(outlink, inlink);
520 
521  return FFERROR_NOT_READY;
522 }
523 
525 {
526  ShowFreqsContext *s = ctx->priv;
527  int i;
528 
529  av_fft_end(s->fft);
530  for (i = 0; i < s->nb_channels; i++) {
531  if (s->fft_data)
532  av_freep(&s->fft_data[i]);
533  if (s->avg_data)
534  av_freep(&s->avg_data[i]);
535  }
536  av_freep(&s->fft_data);
537  av_freep(&s->avg_data);
538  av_freep(&s->window_func_lut);
539  av_audio_fifo_free(s->fifo);
540 }
541 
542 static const AVFilterPad showfreqs_inputs[] = {
543  {
544  .name = "default",
545  .type = AVMEDIA_TYPE_AUDIO,
546  },
547  { NULL }
548 };
549 
550 static const AVFilterPad showfreqs_outputs[] = {
551  {
552  .name = "default",
553  .type = AVMEDIA_TYPE_VIDEO,
554  .config_props = config_output,
555  },
556  { NULL }
557 };
558 
560  .name = "showfreqs",
561  .description = NULL_IF_CONFIG_SMALL("Convert input audio to a frequencies video output."),
562  .init = init,
563  .uninit = uninit,
564  .query_formats = query_formats,
565  .priv_size = sizeof(ShowFreqsContext),
566  .activate = activate,
569  .priv_class = &showfreqs_class,
570 };
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:925
static const AVFilterPad inputs[]
Definition: af_acontrast.c:193
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
@ WFUNC_HAMMING
@ WFUNC_BNUTTALL
@ WFUNC_BHARRIS
@ WFUNC_BLACKMAN
@ WFUNC_NUTTALL
@ WFUNC_TUKEY
@ NB_WFUNC
#define av_cold
Definition: attributes.h:88
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
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
uint8_t
Audio FIFO Buffer.
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AmplitudeScale
DisplayMode
static float get_bsize(ShowFreqsContext *s, int f)
static int get_sx(ShowFreqsContext *s, int f)
ChannelMode
Definition: avf_showfreqs.c:41
@ SEPARATE
Definition: avf_showfreqs.c:41
@ COMBINED
Definition: avf_showfreqs.c:41
@ NB_CMODES
Definition: avf_showfreqs.c:41
static const AVFilterPad showfreqs_outputs[]
static const AVFilterPad showfreqs_inputs[]
DataMode
Definition: avf_showfreqs.c:39
@ NB_DATA
Definition: avf_showfreqs.c:39
@ MAGNITUDE
Definition: avf_showfreqs.c:39
@ DELAY
Definition: avf_showfreqs.c:39
@ PHASE
Definition: avf_showfreqs.c:39
#define IM(x, ch)
@ NB_ASCALES
Definition: avf_showfreqs.c:43
@ AS_LOG
Definition: avf_showfreqs.c:43
@ AS_CBRT
Definition: avf_showfreqs.c:43
@ AS_SQRT
Definition: avf_showfreqs.c:43
@ AS_LINEAR
Definition: avf_showfreqs.c:43
@ NB_MODES
Definition: avf_showfreqs.c:40
@ DOT
Definition: avf_showfreqs.c:40
@ BAR
Definition: avf_showfreqs.c:40
@ LINE
Definition: avf_showfreqs.c:40
static int query_formats(AVFilterContext *ctx)
FrequencyScale
Definition: avf_showfreqs.c:42
@ FS_LOG
Definition: avf_showfreqs.c:42
@ FS_LINEAR
Definition: avf_showfreqs.c:42
@ NB_FSCALES
Definition: avf_showfreqs.c:42
@ FS_RLOG
Definition: avf_showfreqs.c:42
#define FLAGS
Definition: avf_showfreqs.c:73
AVFILTER_DEFINE_CLASS(showfreqs)
static int filter_frame(AVFilterLink *inlink)
#define RE(x, ch)
static void draw_dot(AVFrame *out, int x, int y, uint8_t fg[4])
static int activate(AVFilterContext *ctx)
#define P(a, b)
static av_cold int init(AVFilterContext *ctx)
static av_cold void uninit(AVFilterContext *ctx)
static const AVOption showfreqs_options[]
Definition: avf_showfreqs.c:75
#define OFFSET(x)
Definition: avf_showfreqs.c:72
static int config_output(AVFilterLink *outlink)
AVFilter ff_avf_showfreqs
static int plot_freqs(AVFilterLink *inlink, AVFrame *in)
#define M(a, b)
static void plot_freq(ShowFreqsContext *s, int ch, double a, int f, uint8_t fg[4], int *prev_y, AVFrame *out, AVFilterLink *outlink)
FFT functions.
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1096
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:1513
Main libavfilter public API header.
#define AV_RL32
Definition: intreadwrite.h:146
#define s(width, name)
Definition: cbs_vp9.c:257
#define f(width, name)
Definition: cbs_vp9.c:255
audio channel layout utility functions
#define fail()
Definition: checkasm.h:133
#define avg(a, b, c, d)
#define FFMIN(a, b)
Definition: common.h:105
#define av_clipd
Definition: common.h:173
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
#define FF_FILTER_FORWARD_WANTED(outlink, inlink)
Forward the frame_wanted_out flag from an output link to an input link.
Definition: filters.h:254
#define FF_FILTER_FORWARD_STATUS(inlink, outlink)
Acknowledge the status on an input link and forward it to an output link.
Definition: filters.h:226
#define FFERROR_NOT_READY
Filters implementation helper functions.
Definition: filters.h:34
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
Definition: filters.h:199
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add ref as a new reference to formats.
Definition: formats.c:466
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:286
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:427
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:461
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:421
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
@ AV_OPT_TYPE_CONST
Definition: opt.h:234
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_FLOAT
Definition: opt.h:228
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
void av_fft_permute(FFTContext *s, FFTComplex *z)
Do the permutation needed BEFORE calling ff_fft_calc().
Definition: avfft.c:38
void av_fft_calc(FFTContext *s, FFTComplex *z)
Do a complex FFT with the parameters defined in av_fft_init().
Definition: avfft.c:43
FFTContext * av_fft_init(int nbits, int inverse)
Set up a complex FFT.
Definition: avfft.c:28
av_cold void av_fft_end(FFTContext *s)
Definition: avfft.c:48
int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)
Peek data from an AVAudioFifo.
Definition: audio_fifo.c:138
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
Write data to an AVAudioFifo.
Definition: audio_fifo.c:112
void av_audio_fifo_free(AVAudioFifo *af)
Free an AVAudioFifo.
Definition: audio_fifo.c:45
AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)
Allocate an AVAudioFifo.
Definition: audio_fifo.c:59
int av_audio_fifo_size(AVAudioFifo *af)
Get the current number of samples in the AVAudioFifo available for reading.
Definition: audio_fifo.c:228
int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)
Drain data from an AVAudioFifo.
Definition: audio_fifo.c:201
#define AVERROR(e)
Definition: error.h:43
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
char * av_strdup(const char *s)
Duplicate a string.
Definition: mem.c:253
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:245
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
@ AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
@ AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
char * av_strtok(char *s, const char *delim, char **saveptr)
Split the string into several tokens which can be accessed by successive calls to av_strtok().
Definition: avstring.c:186
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
for(j=16;j >0;--j)
int i
Definition: input.c:407
#define av_log2
Definition: intmath.h:83
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:309
uint8_t w
Definition: llviddspenc.c:39
static const uint32_t color[16+AV_CLASS_CATEGORY_NB]
Definition: log.c:92
#define M_PI
Definition: mathematics.h:52
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
AVOptions.
int av_parse_color(uint8_t *rgba_color, const char *color_string, int slen, void *log_ctx)
Put the RGBA values that correspond to color_string in rgba_color.
Definition: parseutils.c:354
misc parsing utilities
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_RGBA
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
formats
Definition: signature.h:48
Context for an Audio FIFO Buffer.
Definition: audio_fifo.c:34
Describe the class of an AVClass context structure.
Definition: log.h:67
A list of supported channel layouts.
Definition: formats.h:86
An instance of a filter.
Definition: avfilter.h:341
AVFilterFormats * formats
List of supported formats (pixel or sample).
Definition: avfilter.h:445
AVFilterChannelLayouts * channel_layouts
Lists of supported channel layouts, only for audio.
Definition: avfilter.h:455
AVFilterFormats * samplerates
Lists of supported sample rates, only for audio.
Definition: avfilter.h:450
A list of supported formats for one end of a filter link.
Definition: formats.h:65
A filter pad used for either input or output.
Definition: internal.h:54
const char * name
Pad name.
Definition: internal.h:60
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
This structure describes decoded (raw) audio or video data.
Definition: frame.h:318
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:411
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:365
AVOption.
Definition: opt.h:248
Rational number (pair of numerator and denominator).
Definition: rational.h:58
Definition: fft.h:83
AVAudioFifo * fifo
Definition: avf_showfreqs.c:68
FFTContext * fft
Definition: avf_showfreqs.c:56
float * window_func_lut
Definition: avf_showfreqs.c:59
FFTComplex ** fft_data
Definition: avf_showfreqs.c:57
#define cbrt
Definition: tablegen.h:35
#define av_free(p)
#define av_realloc_f(p, o, n)
#define av_freep(p)
#define av_log(a,...)
FILE * out
Definition: movenc.c:54
AVFormatContext * ctx
Definition: movenc.c:48
if(ret< 0)
Definition: vf_mcdeint.c:282
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:104
float min
static void generate_window_func(float *lut, int N, int win_func, float *overlap)
Definition: window_func.h:36
@ WFUNC_BARTLETT
Definition: window_func.h:29
@ WFUNC_POISSON
Definition: window_func.h:32
@ WFUNC_GAUSS
Definition: window_func.h:31
@ WFUNC_CAUCHY
Definition: window_func.h:32
@ WFUNC_RECT
Definition: window_func.h:28
@ WFUNC_BOHMAN
Definition: window_func.h:33
@ WFUNC_WELCH
Definition: window_func.h:29
@ WFUNC_PARZEN
Definition: window_func.h:32
@ WFUNC_DOLPH
Definition: window_func.h:32
@ WFUNC_HANNING
Definition: window_func.h:28
@ WFUNC_SINE
Definition: window_func.h:30
@ WFUNC_BHANN
Definition: window_func.h:31
@ WFUNC_LANCZOS
Definition: window_func.h:31
@ WFUNC_FLATTOP
Definition: window_func.h:29