FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/avf_showfreqs.c
Date: 2024-09-07 18:49:03
Exec Total Coverage
Lines: 0 294 0.0%
Functions: 0 10 0.0%
Branches: 0 161 0.0%

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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 "libavutil/mem.h"
25 #include "libavutil/tx.h"
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/channel_layout.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 "formats.h"
35 #include "video.h"
36 #include "avfilter.h"
37 #include "window_func.h"
38
39 enum DataMode { MAGNITUDE, PHASE, DELAY, NB_DATA };
40 enum DisplayMode { LINE, BAR, DOT, NB_MODES };
41 enum ChannelMode { COMBINED, SEPARATE, NB_CMODES };
42 enum FrequencyScale { FS_LINEAR, FS_LOG, FS_RLOG, NB_FSCALES };
43 enum AmplitudeScale { AS_LINEAR, AS_SQRT, AS_CBRT, AS_LOG, NB_ASCALES };
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 ascale, fscale;
53 int avg;
54 int win_func;
55 char *ch_layout_str;
56 uint8_t *bypass;
57 AVChannelLayout ch_layout;
58 AVTXContext *fft;
59 av_tx_fn tx_fn;
60 AVComplexFloat **fft_input;
61 AVComplexFloat **fft_data;
62 AVFrame *window;
63 float **avg_data;
64 float *window_func_lut;
65 float overlap;
66 float minamp;
67 int hop_size;
68 int nb_channels;
69 int nb_draw_channels;
70 int nb_freq;
71 int win_size;
72 float scale;
73 char *colors;
74 int64_t pts;
75 int64_t old_pts;
76 AVRational frame_rate;
77 } ShowFreqsContext;
78
79 #define OFFSET(x) offsetof(ShowFreqsContext, x)
80 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
81
82 static const AVOption showfreqs_options[] = {
83 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "1024x512"}, 0, 0, FLAGS },
84 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "1024x512"}, 0, 0, FLAGS },
85 { "rate", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
86 { "r", "set video rate", OFFSET(frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
87 { "mode", "set display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=BAR}, 0, NB_MODES-1, FLAGS, .unit = "mode" },
88 { "line", "show lines", 0, AV_OPT_TYPE_CONST, {.i64=LINE}, 0, 0, FLAGS, .unit = "mode" },
89 { "bar", "show bars", 0, AV_OPT_TYPE_CONST, {.i64=BAR}, 0, 0, FLAGS, .unit = "mode" },
90 { "dot", "show dots", 0, AV_OPT_TYPE_CONST, {.i64=DOT}, 0, 0, FLAGS, .unit = "mode" },
91 { "ascale", "set amplitude scale", OFFSET(ascale), AV_OPT_TYPE_INT, {.i64=AS_LOG}, 0, NB_ASCALES-1, FLAGS, .unit = "ascale" },
92 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=AS_LINEAR}, 0, 0, FLAGS, .unit = "ascale" },
93 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=AS_SQRT}, 0, 0, FLAGS, .unit = "ascale" },
94 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=AS_CBRT}, 0, 0, FLAGS, .unit = "ascale" },
95 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=AS_LOG}, 0, 0, FLAGS, .unit = "ascale" },
96 { "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=FS_LINEAR}, 0, NB_FSCALES-1, FLAGS, .unit = "fscale" },
97 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=FS_LINEAR}, 0, 0, FLAGS, .unit = "fscale" },
98 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=FS_LOG}, 0, 0, FLAGS, .unit = "fscale" },
99 { "rlog", "reverse logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=FS_RLOG}, 0, 0, FLAGS, .unit = "fscale" },
100 { "win_size", "set window size", OFFSET(fft_size), AV_OPT_TYPE_INT, {.i64=2048}, 16, 65536, FLAGS },
101 WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_HANNING),
102 { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl=1.}, 0., 1., FLAGS },
103 { "averaging", "set time averaging", OFFSET(avg), AV_OPT_TYPE_INT, {.i64=1}, 0, INT32_MAX, FLAGS },
104 { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
105 { "cmode", "set channel mode", OFFSET(cmode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_CMODES-1, FLAGS, .unit = "cmode" },
106 { "combined", "show all channels in same window", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, .unit = "cmode" },
107 { "separate", "show each channel in own window", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, .unit = "cmode" },
108 { "minamp", "set minimum amplitude", OFFSET(minamp), AV_OPT_TYPE_FLOAT, {.dbl=1e-6}, FLT_MIN, 1e-6, FLAGS },
109 { "data", "set data mode", OFFSET(data_mode), AV_OPT_TYPE_INT, {.i64=MAGNITUDE}, 0, NB_DATA-1, FLAGS, .unit = "data" },
110 { "magnitude", "show magnitude", 0, AV_OPT_TYPE_CONST, {.i64=MAGNITUDE}, 0, 0, FLAGS, .unit = "data" },
111 { "phase", "show phase", 0, AV_OPT_TYPE_CONST, {.i64=PHASE}, 0, 0, FLAGS, .unit = "data" },
112 { "delay", "show group delay",0, AV_OPT_TYPE_CONST, {.i64=DELAY}, 0, 0, FLAGS, .unit = "data" },
113 { "channels", "set channels to draw", OFFSET(ch_layout_str), AV_OPT_TYPE_STRING, {.str="all"}, 0, 0, FLAGS },
114 { NULL }
115 };
116
117 AVFILTER_DEFINE_CLASS(showfreqs);
118
119 static int query_formats(AVFilterContext *ctx)
120 {
121 AVFilterFormats *formats = NULL;
122 AVFilterChannelLayouts *layouts = NULL;
123 AVFilterLink *inlink = ctx->inputs[0];
124 AVFilterLink *outlink = ctx->outputs[0];
125 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
126 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_NONE };
127 int ret;
128
129 /* set input audio formats */
130 formats = ff_make_format_list(sample_fmts);
131 if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
132 return ret;
133
134 layouts = ff_all_channel_counts();
135 if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
136 return ret;
137
138 formats = ff_all_samplerates();
139 if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
140 return ret;
141
142 /* set output video format */
143 formats = ff_make_format_list(pix_fmts);
144 if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
145 return ret;
146
147 return 0;
148 }
149
150 static int config_output(AVFilterLink *outlink)
151 {
152 FilterLink *l = ff_filter_link(outlink);
153 AVFilterContext *ctx = outlink->src;
154 AVFilterLink *inlink = ctx->inputs[0];
155 ShowFreqsContext *s = ctx->priv;
156 float overlap, scale = 1.f;
157 int i, ret;
158
159 s->old_pts = AV_NOPTS_VALUE;
160 s->nb_freq = s->fft_size / 2;
161 s->win_size = s->fft_size;
162 av_tx_uninit(&s->fft);
163 ret = av_tx_init(&s->fft, &s->tx_fn, AV_TX_FLOAT_FFT, 0, s->fft_size, &scale, 0);
164 if (ret < 0) {
165 av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
166 "The window size might be too high.\n");
167 return ret;
168 }
169
170 /* FFT buffers: x2 for each (display) channel buffer.
171 * Note: we use free and malloc instead of a realloc-like function to
172 * make sure the buffer is aligned in memory for the FFT functions. */
173 for (i = 0; i < s->nb_channels; i++) {
174 av_freep(&s->fft_input[i]);
175 av_freep(&s->fft_data[i]);
176 av_freep(&s->avg_data[i]);
177 }
178 av_freep(&s->bypass);
179 av_freep(&s->fft_input);
180 av_freep(&s->fft_data);
181 av_freep(&s->avg_data);
182 s->nb_channels = inlink->ch_layout.nb_channels;
183
184 s->bypass = av_calloc(s->nb_channels, sizeof(*s->bypass));
185 if (!s->bypass)
186 return AVERROR(ENOMEM);
187 s->fft_input = av_calloc(s->nb_channels, sizeof(*s->fft_input));
188 if (!s->fft_input)
189 return AVERROR(ENOMEM);
190 s->fft_data = av_calloc(s->nb_channels, sizeof(*s->fft_data));
191 if (!s->fft_data)
192 return AVERROR(ENOMEM);
193 s->avg_data = av_calloc(s->nb_channels, sizeof(*s->avg_data));
194 if (!s->avg_data)
195 return AVERROR(ENOMEM);
196 for (i = 0; i < s->nb_channels; i++) {
197 s->fft_input[i] = av_calloc(FFALIGN(s->win_size, 512), sizeof(**s->fft_input));
198 s->fft_data[i] = av_calloc(FFALIGN(s->win_size, 512), sizeof(**s->fft_data));
199 s->avg_data[i] = av_calloc(s->nb_freq, sizeof(**s->avg_data));
200 if (!s->fft_data[i] || !s->avg_data[i] || !s->fft_input[i])
201 return AVERROR(ENOMEM);
202 }
203
204 /* pre-calc windowing function */
205 s->window_func_lut = av_realloc_f(s->window_func_lut, s->win_size,
206 sizeof(*s->window_func_lut));
207 if (!s->window_func_lut)
208 return AVERROR(ENOMEM);
209 generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
210 if (s->overlap == 1.)
211 s->overlap = overlap;
212 s->hop_size = (1. - s->overlap) * s->win_size;
213 if (s->hop_size < 1) {
214 av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
215 return AVERROR(EINVAL);
216 }
217
218 for (s->scale = 0, i = 0; i < s->win_size; i++) {
219 s->scale += s->window_func_lut[i] * s->window_func_lut[i];
220 }
221
222 s->window = ff_get_audio_buffer(inlink, s->win_size * 2);
223 if (!s->window)
224 return AVERROR(ENOMEM);
225
226 l->frame_rate = s->frame_rate;
227 outlink->time_base = av_inv_q(l->frame_rate);
228 outlink->sample_aspect_ratio = (AVRational){1,1};
229 outlink->w = s->w;
230 outlink->h = s->h;
231
232 ret = av_channel_layout_copy(&s->ch_layout, &inlink->ch_layout);
233 if (ret < 0)
234 return ret;
235 s->nb_draw_channels = s->nb_channels;
236
237 if (strcmp(s->ch_layout_str, "all")) {
238 int nb_draw_channels = 0;
239 av_channel_layout_from_string(&s->ch_layout,
240 s->ch_layout_str);
241
242 for (int ch = 0; ch < s->nb_channels; ch++) {
243 const enum AVChannel channel = av_channel_layout_channel_from_index(&inlink->ch_layout, ch);
244
245 s->bypass[ch] = av_channel_layout_index_from_channel(&s->ch_layout, channel) < 0;
246 nb_draw_channels += s->bypass[ch] == 0;
247 }
248
249 s->nb_draw_channels = nb_draw_channels;
250 }
251
252 return 0;
253 }
254
255 static inline void draw_dot(AVFrame *out, int x, int y, uint8_t fg[4])
256 {
257
258 uint32_t color = AV_RL32(out->data[0] + y * out->linesize[0] + x * 4);
259
260 if ((color & 0xffffff) != 0)
261 AV_WL32(out->data[0] + y * out->linesize[0] + x * 4, AV_RL32(fg) | color);
262 else
263 AV_WL32(out->data[0] + y * out->linesize[0] + x * 4, AV_RL32(fg));
264 }
265
266 static int get_sx(ShowFreqsContext *s, int f)
267 {
268 switch (s->fscale) {
269 case FS_LINEAR:
270 return (s->w/(float)s->nb_freq)*f;
271 case FS_LOG:
272 return s->w-pow(s->w, (s->nb_freq-f-1)/(s->nb_freq-1.));
273 case FS_RLOG:
274 return pow(s->w, f/(s->nb_freq-1.));
275 }
276
277 return 0;
278 }
279
280 static float get_bsize(ShowFreqsContext *s, int f)
281 {
282 switch (s->fscale) {
283 case FS_LINEAR:
284 return s->w/(float)s->nb_freq;
285 case FS_LOG:
286 return pow(s->w, (s->nb_freq-f-1)/(s->nb_freq-1.))-
287 pow(s->w, (s->nb_freq-f-2)/(s->nb_freq-1.));
288 case FS_RLOG:
289 return pow(s->w, (f+1)/(s->nb_freq-1.))-
290 pow(s->w, f /(s->nb_freq-1.));
291 }
292
293 return 1.;
294 }
295
296 static inline void plot_freq(ShowFreqsContext *s, int ch,
297 double a, int f, uint8_t fg[4], int *prev_y,
298 AVFrame *out, AVFilterLink *outlink)
299 {
300 FilterLink *outl = ff_filter_link(outlink);
301 const int w = s->w;
302 const float min = s->minamp;
303 const float avg = s->avg_data[ch][f];
304 const float bsize = get_bsize(s, f);
305 const int sx = get_sx(s, f);
306 int end = outlink->h;
307 int x, y, i;
308
309 switch(s->ascale) {
310 case AS_SQRT:
311 a = 1.0 - sqrt(a);
312 break;
313 case AS_CBRT:
314 a = 1.0 - cbrt(a);
315 break;
316 case AS_LOG:
317 a = log(av_clipd(a, min, 1)) / log(min);
318 break;
319 case AS_LINEAR:
320 a = 1.0 - a;
321 break;
322 }
323
324 switch (s->cmode) {
325 case COMBINED:
326 y = a * outlink->h - 1;
327 break;
328 case SEPARATE:
329 end = (outlink->h / s->nb_draw_channels) * (ch + 1);
330 y = (outlink->h / s->nb_draw_channels) * ch + a * (outlink->h / s->nb_draw_channels) - 1;
331 break;
332 default:
333 av_assert0(0);
334 }
335 if (y < 0)
336 return;
337
338 switch (s->avg) {
339 case 0:
340 y = s->avg_data[ch][f] = !outl->frame_count_in ? y : FFMIN(0, y);
341 break;
342 case 1:
343 break;
344 default:
345 s->avg_data[ch][f] = avg + y * (y - avg) / (FFMIN(outl->frame_count_in + 1, s->avg) * (float)y);
346 y = av_clip(s->avg_data[ch][f], 0, outlink->h - 1);
347 break;
348 }
349
350 switch(s->mode) {
351 case LINE:
352 if (*prev_y == -1) {
353 *prev_y = y;
354 }
355 if (y <= *prev_y) {
356 for (x = sx + 1; x < sx + bsize && x < w; x++)
357 draw_dot(out, x, y, fg);
358 for (i = y; i <= *prev_y; i++)
359 draw_dot(out, sx, i, fg);
360 } else {
361 for (i = *prev_y; i <= y; i++)
362 draw_dot(out, sx, i, fg);
363 for (x = sx + 1; x < sx + bsize && x < w; x++)
364 draw_dot(out, x, i - 1, fg);
365 }
366 *prev_y = y;
367 break;
368 case BAR:
369 for (x = sx; x < sx + bsize && x < w; x++)
370 for (i = y; i < end; i++)
371 draw_dot(out, x, i, fg);
372 break;
373 case DOT:
374 for (x = sx; x < sx + bsize && x < w; x++)
375 draw_dot(out, x, y, fg);
376 break;
377 }
378 }
379
380 static int plot_freqs(AVFilterLink *inlink, int64_t pts)
381 {
382 AVFilterContext *ctx = inlink->dst;
383 AVFilterLink *outlink = ctx->outputs[0];
384 ShowFreqsContext *s = ctx->priv;
385 AVFrame *in = s->window;
386 const int win_size = s->win_size;
387 char *colors, *color, *saveptr = NULL;
388 AVFrame *out;
389 int ch, n;
390
391 /* fill FFT input with the number of samples available */
392 for (ch = 0; ch < s->nb_channels; ch++) {
393 const float *p = (float *)in->extended_data[ch];
394
395 if (s->bypass[ch])
396 continue;
397
398 for (n = 0; n < win_size; n++) {
399 s->fft_input[ch][n].re = p[n] * s->window_func_lut[n];
400 s->fft_input[ch][n].im = 0;
401 }
402 }
403
404 /* run FFT on each samples set */
405 for (ch = 0; ch < s->nb_channels; ch++) {
406 if (s->bypass[ch])
407 continue;
408
409 s->tx_fn(s->fft, s->fft_data[ch], s->fft_input[ch], sizeof(AVComplexFloat));
410 }
411
412 s->pts = av_rescale_q(pts, inlink->time_base, outlink->time_base);
413 if (s->old_pts >= s->pts)
414 return 0;
415 s->old_pts = s->pts;
416
417 #define RE(x, ch) s->fft_data[ch][x].re
418 #define IM(x, ch) s->fft_data[ch][x].im
419 #define M(a, b) (sqrt((a) * (a) + (b) * (b)))
420 #define P(a, b) (atan2((b), (a)))
421
422 colors = av_strdup(s->colors);
423 if (!colors)
424 return AVERROR(ENOMEM);
425
426 out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
427 if (!out) {
428 av_free(colors);
429 return AVERROR(ENOMEM);
430 }
431
432 for (n = 0; n < outlink->h; n++)
433 memset(out->data[0] + out->linesize[0] * n, 0, outlink->w * 4);
434
435 for (ch = 0; ch < s->nb_channels; ch++) {
436 uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
437 int prev_y = -1, f;
438 double a;
439
440 color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
441 if (color)
442 av_parse_color(fg, color, -1, ctx);
443
444 if (s->bypass[ch])
445 continue;
446
447 switch (s->data_mode) {
448 case MAGNITUDE:
449 for (f = 0; f < s->nb_freq; f++) {
450 a = av_clipd(M(RE(f, ch), IM(f, ch)) / s->scale, 0, 1);
451
452 plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
453 }
454 break;
455 case PHASE:
456 for (f = 0; f < s->nb_freq; f++) {
457 a = av_clipd((M_PI + P(RE(f, ch), IM(f, ch))) / (2. * M_PI), 0, 1);
458
459 plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
460 }
461 break;
462 case DELAY:
463 for (f = 0; f < s->nb_freq; f++) {
464 a = av_clipd((M_PI - P(IM(f, ch) * RE(f-1, ch) - IM(f-1, ch) * RE(f, ch),
465 RE(f, ch) * RE(f-1, ch) + IM(f, ch) * IM(f-1, ch))) / (2. * M_PI), 0, 1);
466
467 plot_freq(s, ch, a, f, fg, &prev_y, out, outlink);
468 }
469 break;
470 }
471 }
472
473 av_free(colors);
474 out->pts = s->pts;
475 out->duration = 1;
476 out->sample_aspect_ratio = (AVRational){1,1};
477 return ff_filter_frame(outlink, out);
478 }
479
480 static int filter_frame(AVFilterLink *inlink, AVFrame *in)
481 {
482 AVFilterContext *ctx = inlink->dst;
483 ShowFreqsContext *s = ctx->priv;
484 const int offset = s->win_size - s->hop_size;
485 int64_t pts = in->pts;
486
487 for (int ch = 0; ch < in->ch_layout.nb_channels; ch++) {
488 float *dst = (float *)s->window->extended_data[ch];
489
490 memmove(dst, &dst[s->hop_size], offset * sizeof(float));
491 memcpy(&dst[offset], in->extended_data[ch], in->nb_samples * sizeof(float));
492 memset(&dst[offset + in->nb_samples], 0, (s->hop_size - in->nb_samples) * sizeof(float));
493 }
494
495 av_frame_free(&in);
496
497 return plot_freqs(inlink, pts);
498 }
499
500 static int activate(AVFilterContext *ctx)
501 {
502 AVFilterLink *inlink = ctx->inputs[0];
503 AVFilterLink *outlink = ctx->outputs[0];
504 ShowFreqsContext *s = ctx->priv;
505 AVFrame *in;
506 int ret;
507
508 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
509
510 ret = ff_inlink_consume_samples(inlink, s->hop_size, s->hop_size, &in);
511 if (ret < 0)
512 return ret;
513
514 if (ret > 0)
515 ret = filter_frame(inlink, in);
516 if (ret < 0)
517 return ret;
518
519 if (ff_inlink_queued_samples(inlink) >= s->hop_size) {
520 ff_filter_set_ready(ctx, 10);
521 return 0;
522 }
523
524 FF_FILTER_FORWARD_STATUS(inlink, outlink);
525 FF_FILTER_FORWARD_WANTED(outlink, inlink);
526
527 return FFERROR_NOT_READY;
528 }
529
530 static av_cold void uninit(AVFilterContext *ctx)
531 {
532 ShowFreqsContext *s = ctx->priv;
533 int i;
534
535 av_channel_layout_uninit(&s->ch_layout);
536 av_tx_uninit(&s->fft);
537 for (i = 0; i < s->nb_channels; i++) {
538 if (s->fft_input)
539 av_freep(&s->fft_input[i]);
540 if (s->fft_data)
541 av_freep(&s->fft_data[i]);
542 if (s->avg_data)
543 av_freep(&s->avg_data[i]);
544 }
545 av_freep(&s->bypass);
546 av_freep(&s->fft_input);
547 av_freep(&s->fft_data);
548 av_freep(&s->avg_data);
549 av_freep(&s->window_func_lut);
550 av_frame_free(&s->window);
551 }
552
553 static const AVFilterPad showfreqs_outputs[] = {
554 {
555 .name = "default",
556 .type = AVMEDIA_TYPE_VIDEO,
557 .config_props = config_output,
558 },
559 };
560
561 const AVFilter ff_avf_showfreqs = {
562 .name = "showfreqs",
563 .description = NULL_IF_CONFIG_SMALL("Convert input audio to a frequencies video output."),
564 .uninit = uninit,
565 .priv_size = sizeof(ShowFreqsContext),
566 .activate = activate,
567 FILTER_INPUTS(ff_audio_default_filterpad),
568 FILTER_OUTPUTS(showfreqs_outputs),
569 FILTER_QUERY_FUNC(query_formats),
570 .priv_class = &showfreqs_class,
571 };
572