FFmpeg coverage

Line	Branch	Exec	Source
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