FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* Copyright (c) 2012-2013 Clément Bœsch
3			* Copyright (c) 2013 Rudolf Polzer <divverent@xonotic.org>
4			* Copyright (c) 2015 Paul B Mahol
5			*
6			* This file is part of FFmpeg.
7			*
8			* FFmpeg is free software; you can redistribute it and/or
9			* modify it under the terms of the GNU Lesser General Public
10			* License as published by the Free Software Foundation; either
11			* version 2.1 of the License, or (at your option) any later version.
12			*
13			* FFmpeg is distributed in the hope that it will be useful,
14			* but WITHOUT ANY WARRANTY; without even the implied warranty of
15			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16			* Lesser General Public License for more details.
17			*
18			* You should have received a copy of the GNU Lesser General Public
19			* License along with FFmpeg; if not, write to the Free Software
20			* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21			*/
22
23			/**
24			* @file
25			* audio to spectrum (video) transmedia filter, based on ffplay rdft showmode
26			* (by Michael Niedermayer) and lavfi/avf_showwaves (by Stefano Sabatini).
27			*/
28
29			#include "config_components.h"
30
31			#include <float.h>
32			#include <math.h>
33			#include <stdio.h>
34
35			#include "libavutil/mem.h"
36			#include "libavutil/tx.h"
37			#include "libavutil/avassert.h"
38			#include "libavutil/avstring.h"
39			#include "libavutil/channel_layout.h"
40			#include "libavutil/cpu.h"
41			#include "libavutil/opt.h"
42			#include "libavutil/parseutils.h"
43			#include "libavutil/xga_font_data.h"
44			#include "audio.h"
45			#include "formats.h"
46			#include "video.h"
47			#include "avfilter.h"
48			#include "filters.h"
49			#include "window_func.h"
50
51			enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
52			enum DataMode { D_MAGNITUDE, D_PHASE, D_UPHASE, NB_DMODES };
53			enum FrequencyScale { F_LINEAR, F_LOG, NB_FSCALES };
54			enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES };
55			enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, MAGMA, GREEN, VIRIDIS, PLASMA, CIVIDIS, TERRAIN, NB_CLMODES };
56			enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, LREPLACE, NB_SLIDES };
57			enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
58
59			#define DEFAULT_LENGTH 300
60
61			typedef struct ShowSpectrumContext {
62			const AVClass *class;
63			int w, h;
64			char *rate_str;
65			AVRational auto_frame_rate;
66			AVRational frame_rate;
67			AVFrame *outpicref;
68			AVFrame *in_frame;
69			int nb_display_channels;
70			int orientation;
71			int channel_width;
72			int channel_height;
73			int sliding; ///< 1 if sliding mode, 0 otherwise
74			int mode; ///< channel display mode
75			int color_mode; ///< display color scheme
76			int scale;
77			int fscale;
78			float saturation; ///< color saturation multiplier
79			float rotation; ///< color rotation
80			int start, stop; ///< zoom mode
81			int data;
82			int xpos; ///< x position (current column)
83			AVTXContext **fft; ///< Fast Fourier Transform context
84			AVTXContext **ifft; ///< Inverse Fast Fourier Transform context
85			av_tx_fn tx_fn;
86			av_tx_fn itx_fn;
87			int fft_size; ///< number of coeffs (FFT window size)
88			AVComplexFloat **fft_in; ///< input FFT coeffs
89			AVComplexFloat **fft_data; ///< bins holder for each (displayed) channels
90			AVComplexFloat **fft_scratch;///< scratch buffers
91			float *window_func_lut; ///< Window function LUT
92			float **magnitudes;
93			float **phases;
94			int win_func;
95			int win_size;
96			int buf_size;
97			double win_scale;
98			float overlap;
99			float gain;
100			int hop_size;
101			float *combine_buffer; ///< color combining buffer (4 * h items)
102			float **color_buffer; ///< color buffer (4 * h * ch items)
103			int64_t pts;
104			int64_t old_pts;
105			int64_t in_pts;
106			int old_len;
107			int single_pic;
108			int legend;
109			int start_x, start_y;
110			float drange, limit;
111			float dmin, dmax;
112			uint64_t samples;
113			int (*plot_channel)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
114			int eof;
115
116			float opacity_factor;
117
118			AVFrame **frames;
119			unsigned int nb_frames;
120			unsigned int frames_size;
121			} ShowSpectrumContext;
122
123			#define OFFSET(x) offsetof(ShowSpectrumContext, x)
124			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
125
126			static const AVOption showspectrum_options[] = {
127			{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
128			{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
129			{ "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_SLIDES-1, FLAGS, .unit = "slide" },
130			{ "replace", "replace old columns with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, .unit = "slide" },
131			{ "scroll", "scroll from right to left", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, .unit = "slide" },
132			{ "fullframe", "return full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, FLAGS, .unit = "slide" },
133			{ "rscroll", "scroll from left to right", 0, AV_OPT_TYPE_CONST, {.i64=RSCROLL}, 0, 0, FLAGS, .unit = "slide" },
134			{ "lreplace", "replace from right to left", 0, AV_OPT_TYPE_CONST, {.i64=LREPLACE}, 0, 0, FLAGS, .unit = "slide" },
135			{ "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, COMBINED, NB_MODES-1, FLAGS, .unit = "mode" },
136			{ "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, .unit = "mode" },
137			{ "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, .unit = "mode" },
138			{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=CHANNEL}, CHANNEL, NB_CLMODES-1, FLAGS, .unit = "color" },
139			{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, .unit = "color" },
140			{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, .unit = "color" },
141			{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, .unit = "color" },
142			{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, .unit = "color" },
143			{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, .unit = "color" },
144			{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, .unit = "color" },
145			{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, .unit = "color" },
146			{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, .unit = "color" },
147			{ "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, .unit = "color" },
148			{ "magma", "magma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MAGMA}, 0, 0, FLAGS, .unit = "color" },
149			{ "green", "green based coloring", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, FLAGS, .unit = "color" },
150			{ "viridis", "viridis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=VIRIDIS}, 0, 0, FLAGS, .unit = "color" },
151			{ "plasma", "plasma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=PLASMA}, 0, 0, FLAGS, .unit = "color" },
152			{ "cividis", "cividis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=CIVIDIS}, 0, 0, FLAGS, .unit = "color" },
153			{ "terrain", "terrain based coloring", 0, AV_OPT_TYPE_CONST, {.i64=TERRAIN}, 0, 0, FLAGS, .unit = "color" },
154			{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, .unit = "scale" },
155			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "scale" },
156			{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, .unit = "scale" },
157			{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, .unit = "scale" },
158			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "scale" },
159			{ "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, .unit = "scale" },
160			{ "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, .unit = "scale" },
161			{ "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=F_LINEAR}, 0, NB_FSCALES-1, FLAGS, .unit = "fscale" },
162			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=F_LINEAR}, 0, 0, FLAGS, .unit = "fscale" },
163			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=F_LOG}, 0, 0, FLAGS, .unit = "fscale" },
164			{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
165			WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_HANNING),
166			{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, .unit = "orientation" },
167			{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, .unit = "orientation" },
168			{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, .unit = "orientation" },
169			{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, 1, FLAGS },
170			{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
171			{ "data", "set data mode", OFFSET(data), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_DMODES-1, FLAGS, .unit = "data" },
172			{ "magnitude", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_MAGNITUDE}, 0, 0, FLAGS, .unit = "data" },
173			{ "phase", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_PHASE}, 0, 0, FLAGS, .unit = "data" },
174			{ "uphase", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_UPHASE}, 0, 0, FLAGS, .unit = "data" },
175			{ "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
176			{ "start", "start frequency", OFFSET(start), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
177			{ "stop", "stop frequency", OFFSET(stop), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
178			{ "fps", "set video rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "auto"}, 0, 0, FLAGS },
179			{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
180			{ "drange", "set dynamic range in dBFS", OFFSET(drange), AV_OPT_TYPE_FLOAT, {.dbl = 120}, 10, 200, FLAGS },
181			{ "limit", "set upper limit in dBFS", OFFSET(limit), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -100, 100, FLAGS },
182			{ "opacity", "set opacity strength", OFFSET(opacity_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 10, FLAGS },
183			{ NULL }
184			};
185
186			AVFILTER_DEFINE_CLASS(showspectrum);
187
188			static const struct ColorTable {
189			float a, y, u, v;
190			} color_table[][8] = {
191			[INTENSITY] = {
192			{ 0, 0, 0, 0 },
193			{ 0.13, .03587126228984074, .1573300977624594, -.02548747583751842 },
194			{ 0.30, .18572281794568020, .1772436246393981, .17475554840414750 },
195			{ 0.60, .28184980583656130, -.1593064119945782, .47132074554608920 },
196			{ 0.73, .65830621175547810, -.3716070802232764, .24352759331252930 },
197			{ 0.78, .76318535758242900, -.4307467689263783, .16866496622310430 },
198			{ 0.91, .95336363636363640, -.2045454545454546, .03313636363636363 },
199			{ 1, 1, 0, 0 }},
200			[RAINBOW] = {
201			{ 0, 0, 0, 0 },
202			{ 0.13, 44/256., (189-128)/256., (138-128)/256. },
203			{ 0.25, 29/256., (186-128)/256., (119-128)/256. },
204			{ 0.38, 119/256., (194-128)/256., (53-128)/256. },
205			{ 0.60, 111/256., (73-128)/256., (59-128)/256. },
206			{ 0.73, 205/256., (19-128)/256., (149-128)/256. },
207			{ 0.86, 135/256., (83-128)/256., (200-128)/256. },
208			{ 1, 73/256., (95-128)/256., (225-128)/256. }},
209			[MORELAND] = {
210			{ 0, 44/256., (181-128)/256., (112-128)/256. },
211			{ 0.13, 126/256., (177-128)/256., (106-128)/256. },
212			{ 0.25, 164/256., (163-128)/256., (109-128)/256. },
213			{ 0.38, 200/256., (140-128)/256., (120-128)/256. },
214			{ 0.60, 201/256., (117-128)/256., (141-128)/256. },
215			{ 0.73, 177/256., (103-128)/256., (165-128)/256. },
216			{ 0.86, 136/256., (100-128)/256., (183-128)/256. },
217			{ 1, 68/256., (117-128)/256., (203-128)/256. }},
218			[NEBULAE] = {
219			{ 0, 10/256., (134-128)/256., (132-128)/256. },
220			{ 0.23, 21/256., (137-128)/256., (130-128)/256. },
221			{ 0.45, 35/256., (134-128)/256., (134-128)/256. },
222			{ 0.57, 51/256., (130-128)/256., (139-128)/256. },
223			{ 0.67, 104/256., (116-128)/256., (162-128)/256. },
224			{ 0.77, 120/256., (105-128)/256., (188-128)/256. },
225			{ 0.87, 140/256., (105-128)/256., (188-128)/256. },
226			{ 1, 1, 0, 0 }},
227			[FIRE] = {
228			{ 0, 0, 0, 0 },
229			{ 0.23, 44/256., (132-128)/256., (127-128)/256. },
230			{ 0.45, 62/256., (116-128)/256., (140-128)/256. },
231			{ 0.57, 75/256., (105-128)/256., (152-128)/256. },
232			{ 0.67, 95/256., (91-128)/256., (166-128)/256. },
233			{ 0.77, 126/256., (74-128)/256., (172-128)/256. },
234			{ 0.87, 164/256., (73-128)/256., (162-128)/256. },
235			{ 1, 1, 0, 0 }},
236			[FIERY] = {
237			{ 0, 0, 0, 0 },
238			{ 0.23, 36/256., (116-128)/256., (163-128)/256. },
239			{ 0.45, 52/256., (102-128)/256., (200-128)/256. },
240			{ 0.57, 116/256., (84-128)/256., (196-128)/256. },
241			{ 0.67, 157/256., (67-128)/256., (181-128)/256. },
242			{ 0.77, 193/256., (40-128)/256., (155-128)/256. },
243			{ 0.87, 221/256., (101-128)/256., (134-128)/256. },
244			{ 1, 1, 0, 0 }},
245			[FRUIT] = {
246			{ 0, 0, 0, 0 },
247			{ 0.20, 29/256., (136-128)/256., (119-128)/256. },
248			{ 0.30, 60/256., (119-128)/256., (90-128)/256. },
249			{ 0.40, 85/256., (91-128)/256., (85-128)/256. },
250			{ 0.50, 116/256., (70-128)/256., (105-128)/256. },
251			{ 0.60, 151/256., (50-128)/256., (146-128)/256. },
252			{ 0.70, 191/256., (63-128)/256., (178-128)/256. },
253			{ 1, 98/256., (80-128)/256., (221-128)/256. }},
254			[COOL] = {
255			{ 0, 0, 0, 0 },
256			{ .15, 0, .5, -.5 },
257			{ 1, 1, -.5, .5 }},
258			[MAGMA] = {
259			{ 0, 0, 0, 0 },
260			{ 0.10, 23/256., (175-128)/256., (120-128)/256. },
261			{ 0.23, 43/256., (158-128)/256., (144-128)/256. },
262			{ 0.35, 85/256., (138-128)/256., (179-128)/256. },
263			{ 0.48, 96/256., (128-128)/256., (189-128)/256. },
264			{ 0.64, 128/256., (103-128)/256., (214-128)/256. },
265			{ 0.92, 205/256., (80-128)/256., (152-128)/256. },
266			{ 1, 1, 0, 0 }},
267			[GREEN] = {
268			{ 0, 0, 0, 0 },
269			{ .75, .5, 0, -.5 },
270			{ 1, 1, 0, 0 }},
271			[VIRIDIS] = {
272			{ 0, 0, 0, 0 },
273			{ 0.10, 0x39/255., (0x9D -128)/255., (0x8F -128)/255. },
274			{ 0.23, 0x5C/255., (0x9A -128)/255., (0x68 -128)/255. },
275			{ 0.35, 0x69/255., (0x93 -128)/255., (0x57 -128)/255. },
276			{ 0.48, 0x76/255., (0x88 -128)/255., (0x4B -128)/255. },
277			{ 0.64, 0x8A/255., (0x72 -128)/255., (0x4F -128)/255. },
278			{ 0.80, 0xA3/255., (0x50 -128)/255., (0x66 -128)/255. },
279			{ 1, 0xCC/255., (0x2F -128)/255., (0x87 -128)/255. }},
280			[PLASMA] = {
281			{ 0, 0, 0, 0 },
282			{ 0.10, 0x27/255., (0xC2 -128)/255., (0x82 -128)/255. },
283			{ 0.58, 0x5B/255., (0x9A -128)/255., (0xAE -128)/255. },
284			{ 0.70, 0x89/255., (0x44 -128)/255., (0xAB -128)/255. },
285			{ 0.80, 0xB4/255., (0x2B -128)/255., (0x9E -128)/255. },
286			{ 0.91, 0xD2/255., (0x38 -128)/255., (0x92 -128)/255. },
287			{ 1, 1, 0, 0. }},
288			[CIVIDIS] = {
289			{ 0, 0, 0, 0 },
290			{ 0.20, 0x28/255., (0x98 -128)/255., (0x6F -128)/255. },
291			{ 0.50, 0x48/255., (0x95 -128)/255., (0x74 -128)/255. },
292			{ 0.63, 0x69/255., (0x84 -128)/255., (0x7F -128)/255. },
293			{ 0.76, 0x89/255., (0x75 -128)/255., (0x84 -128)/255. },
294			{ 0.90, 0xCE/255., (0x35 -128)/255., (0x95 -128)/255. },
295			{ 1, 1, 0, 0. }},
296			[TERRAIN] = {
297			{ 0, 0, 0, 0 },
298			{ 0.15, 0, .5, 0 },
299			{ 0.60, 1, -.5, -.5 },
300			{ 0.85, 1, -.5, .5 },
301			{ 1, 1, 0, 0 }},
302			};
303
304		✗	static av_cold void uninit(AVFilterContext *ctx)
305			{
306		✗	ShowSpectrumContext *s = ctx->priv;
307			int i;
308
309		✗	av_freep(&s->combine_buffer);
310		✗	if (s->fft) {
311		✗	for (i = 0; i < s->nb_display_channels; i++)
312		✗	av_tx_uninit(&s->fft[i]);
313			}
314		✗	av_freep(&s->fft);
315		✗	if (s->ifft) {
316		✗	for (i = 0; i < s->nb_display_channels; i++)
317		✗	av_tx_uninit(&s->ifft[i]);
318			}
319		✗	av_freep(&s->ifft);
320		✗	if (s->fft_data) {
321		✗	for (i = 0; i < s->nb_display_channels; i++)
322		✗	av_freep(&s->fft_data[i]);
323			}
324		✗	av_freep(&s->fft_data);
325		✗	if (s->fft_in) {
326		✗	for (i = 0; i < s->nb_display_channels; i++)
327		✗	av_freep(&s->fft_in[i]);
328			}
329		✗	av_freep(&s->fft_in);
330		✗	if (s->fft_scratch) {
331		✗	for (i = 0; i < s->nb_display_channels; i++)
332		✗	av_freep(&s->fft_scratch[i]);
333			}
334		✗	av_freep(&s->fft_scratch);
335		✗	if (s->color_buffer) {
336		✗	for (i = 0; i < s->nb_display_channels; i++)
337		✗	av_freep(&s->color_buffer[i]);
338			}
339		✗	av_freep(&s->color_buffer);
340		✗	av_freep(&s->window_func_lut);
341		✗	if (s->magnitudes) {
342		✗	for (i = 0; i < s->nb_display_channels; i++)
343		✗	av_freep(&s->magnitudes[i]);
344			}
345		✗	av_freep(&s->magnitudes);
346		✗	av_frame_free(&s->outpicref);
347		✗	av_frame_free(&s->in_frame);
348		✗	if (s->phases) {
349		✗	for (i = 0; i < s->nb_display_channels; i++)
350		✗	av_freep(&s->phases[i]);
351			}
352		✗	av_freep(&s->phases);
353
354		✗	while (s->nb_frames > 0) {
355		✗	av_frame_free(&s->frames[s->nb_frames - 1]);
356		✗	s->nb_frames--;
357			}
358
359		✗	av_freep(&s->frames);
360		✗	}
361
362		✗	static int query_formats(const AVFilterContext *ctx,
363			AVFilterFormatsConfig **cfg_in,
364			AVFilterFormatsConfig **cfg_out)
365			{
366		✗	AVFilterFormats *formats = NULL;
367			static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
368			static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE };
369			int ret;
370
371			/* set input audio formats */
372		✗	formats = ff_make_sample_format_list(sample_fmts);
373		✗	if ((ret = ff_formats_ref(formats, &cfg_in[0]->formats)) < 0)
374		✗	return ret;
375
376			/* set output video format */
377		✗	formats = ff_make_pixel_format_list(pix_fmts);
378		✗	if ((ret = ff_formats_ref(formats, &cfg_out[0]->formats)) < 0)
379		✗	return ret;
380
381		✗	return 0;
382			}
383
384		✗	static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
385			{
386		✗	ShowSpectrumContext *s = ctx->priv;
387		✗	AVFilterLink *inlink = ctx->inputs[0];
388		✗	const float *window_func_lut = s->window_func_lut;
389		✗	AVFrame *fin = arg;
390		✗	const int ch = jobnr;
391			int n;
392
393			/* fill FFT input with the number of samples available */
394		✗	const float *p = (float *)fin->extended_data[ch];
395		✗	float *in_frame = (float *)s->in_frame->extended_data[ch];
396
397		✗	memmove(in_frame, in_frame + s->hop_size, (s->fft_size - s->hop_size) * sizeof(float));
398		✗	memcpy(in_frame + s->fft_size - s->hop_size, p, fin->nb_samples * sizeof(float));
399
400		✗	for (int i = fin->nb_samples; i < s->hop_size; i++)
401		✗	in_frame[i + s->fft_size - s->hop_size] = 0.f;
402
403		✗	if (s->stop) {
404			float theta, phi, psi, a, b, S, c;
405		✗	AVComplexFloat *f = s->fft_in[ch];
406		✗	AVComplexFloat *g = s->fft_data[ch];
407		✗	AVComplexFloat *h = s->fft_scratch[ch];
408		✗	int L = s->buf_size;
409		✗	int N = s->win_size;
410		✗	int M = s->win_size / 2;
411
412		✗	for (n = 0; n < s->win_size; n++) {
413		✗	s->fft_data[ch][n].re = in_frame[n] * window_func_lut[n];
414		✗	s->fft_data[ch][n].im = 0;
415			}
416
417		✗	phi = 2.f * M_PI * (s->stop - s->start) / (float)inlink->sample_rate / (M - 1);
418		✗	theta = 2.f * M_PI * s->start / (float)inlink->sample_rate;
419
420		✗	for (int n = 0; n < M; n++) {
421		✗	h[n].re = cosf(n * n / 2.f * phi);
422		✗	h[n].im = sinf(n * n / 2.f * phi);
423			}
424
425		✗	for (int n = M; n < L; n++) {
426		✗	h[n].re = 0.f;
427		✗	h[n].im = 0.f;
428			}
429
430		✗	for (int n = L - N; n < L; n++) {
431		✗	h[n].re = cosf((L - n) * (L - n) / 2.f * phi);
432		✗	h[n].im = sinf((L - n) * (L - n) / 2.f * phi);
433			}
434
435		✗	for (int n = N; n < L; n++) {
436		✗	g[n].re = 0.f;
437		✗	g[n].im = 0.f;
438			}
439
440		✗	for (int n = 0; n < N; n++) {
441		✗	psi = n * theta + n * n / 2.f * phi;
442		✗	c = cosf(psi);
443		✗	S = -sinf(psi);
444		✗	a = c * g[n].re - S * g[n].im;
445		✗	b = S * g[n].re + c * g[n].im;
446		✗	g[n].re = a;
447		✗	g[n].im = b;
448			}
449
450		✗	memcpy(f, h, s->buf_size * sizeof(*f));
451		✗	s->tx_fn(s->fft[ch], h, f, sizeof(AVComplexFloat));
452
453		✗	memcpy(f, g, s->buf_size * sizeof(*f));
454		✗	s->tx_fn(s->fft[ch], g, f, sizeof(AVComplexFloat));
455
456		✗	for (int n = 0; n < L; n++) {
457		✗	c = g[n].re;
458		✗	S = g[n].im;
459		✗	a = c * h[n].re - S * h[n].im;
460		✗	b = S * h[n].re + c * h[n].im;
461
462		✗	g[n].re = a / L;
463		✗	g[n].im = b / L;
464			}
465
466		✗	memcpy(f, g, s->buf_size * sizeof(*f));
467		✗	s->itx_fn(s->ifft[ch], g, f, sizeof(AVComplexFloat));
468
469		✗	for (int k = 0; k < M; k++) {
470		✗	psi = k * k / 2.f * phi;
471		✗	c = cosf(psi);
472		✗	S = -sinf(psi);
473		✗	a = c * g[k].re - S * g[k].im;
474		✗	b = S * g[k].re + c * g[k].im;
475		✗	s->fft_data[ch][k].re = a;
476		✗	s->fft_data[ch][k].im = b;
477			}
478			} else {
479		✗	for (n = 0; n < s->win_size; n++) {
480		✗	s->fft_in[ch][n].re = in_frame[n] * window_func_lut[n];
481		✗	s->fft_in[ch][n].im = 0;
482			}
483
484			/* run FFT on each samples set */
485		✗	s->tx_fn(s->fft[ch], s->fft_data[ch], s->fft_in[ch], sizeof(AVComplexFloat));
486			}
487
488		✗	return 0;
489			}
490
491		✗	static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
492			{
493			const uint8_t *font;
494			int font_height;
495
496		✗	font = avpriv_cga_font_get(), font_height = 8;
497
498		✗	for (int i = 0; txt[i]; i++) {
499			int char_y, mask;
500
501		✗	if (o) {
502		✗	for (char_y = font_height - 1; char_y >= 0; char_y--) {
503		✗	uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
504		✗	for (mask = 0x80; mask; mask >>= 1) {
505		✗	if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
506		✗	p[char_y] = ~p[char_y];
507		✗	p += pic->linesize[0];
508			}
509			}
510			} else {
511		✗	uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
512		✗	for (char_y = 0; char_y < font_height; char_y++) {
513		✗	for (mask = 0x80; mask; mask >>= 1) {
514		✗	if (font[txt[i] * font_height + char_y] & mask)
515		✗	*p = ~(*p);
516		✗	p++;
517			}
518		✗	p += pic->linesize[0] - 8;
519			}
520			}
521			}
522
523		✗	for (int i = 0; txt[i] && pic->data[3]; i++) {
524			int char_y, mask;
525
526		✗	if (o) {
527		✗	for (char_y = font_height - 1; char_y >= 0; char_y--) {
528		✗	uint8_t *p = pic->data[3] + (y + i * 10) * pic->linesize[3] + x;
529		✗	for (mask = 0x80; mask; mask >>= 1) {
530		✗	for (int k = 0; k < 8; k++)
531		✗	p[k] = 255;
532		✗	p += pic->linesize[3];
533			}
534			}
535			} else {
536		✗	uint8_t *p = pic->data[3] + y*pic->linesize[3] + (x + i*8);
537		✗	for (char_y = 0; char_y < font_height; char_y++) {
538		✗	for (mask = 0x80; mask; mask >>= 1)
539		✗	*p++ = 255;
540		✗	p += pic->linesize[3] - 8;
541			}
542			}
543			}
544		✗	}
545
546		✗	static void color_range(ShowSpectrumContext *s, int ch,
547			float *yf, float *uf, float *vf)
548			{
549		✗	switch (s->mode) {
550		✗	case COMBINED:
551			// reduce range by channel count
552		✗	*yf = 256.0f / s->nb_display_channels;
553		✗	switch (s->color_mode) {
554		✗	case RAINBOW:
555			case MORELAND:
556			case NEBULAE:
557			case FIRE:
558			case FIERY:
559			case FRUIT:
560			case COOL:
561			case GREEN:
562			case VIRIDIS:
563			case PLASMA:
564			case CIVIDIS:
565			case TERRAIN:
566			case MAGMA:
567			case INTENSITY:
568		✗	*uf = *yf;
569		✗	*vf = *yf;
570		✗	break;
571		✗	case CHANNEL:
572			/* adjust saturation for mixed UV coloring */
573			/* this factor is correct for infinite channels, an approximation otherwise */
574		✗	*uf = *yf * M_PI;
575		✗	*vf = *yf * M_PI;
576		✗	break;
577		✗	default:
578		✗	av_assert0(0);
579			}
580		✗	break;
581		✗	case SEPARATE:
582			// full range
583		✗	*yf = 256.0f;
584		✗	*uf = 256.0f;
585		✗	*vf = 256.0f;
586		✗	break;
587		✗	default:
588		✗	av_assert0(0);
589			}
590
591		✗	if (s->color_mode == CHANNEL) {
592		✗	if (s->nb_display_channels > 1) {
593		✗	*uf *= 0.5f * sinf((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
594		✗	*vf *= 0.5f * cosf((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
595			} else {
596		✗	*uf *= 0.5f * sinf(M_PI * s->rotation);
597		✗	*vf *= 0.5f * cosf(M_PI * s->rotation + M_PI_2);
598			}
599			} else {
600		✗	*uf += *uf * sinf(M_PI * s->rotation);
601		✗	*vf += *vf * cosf(M_PI * s->rotation + M_PI_2);
602			}
603
604		✗	*uf *= s->saturation;
605		✗	*vf *= s->saturation;
606		✗	}
607
608		✗	static void pick_color(ShowSpectrumContext *s,
609			float yf, float uf, float vf,
610			float a, float *out)
611			{
612		✗	const float af = s->opacity_factor * 255.f;
613
614		✗	if (s->color_mode > CHANNEL) {
615		✗	const int cm = s->color_mode;
616			float y, u, v;
617			int i;
618
619		✗	for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++)
620		✗	if (color_table[cm][i].a >= a)
621		✗	break;
622			// i now is the first item >= the color
623			// now we know to interpolate between item i - 1 and i
624		✗	if (a <= color_table[cm][i - 1].a) {
625		✗	y = color_table[cm][i - 1].y;
626		✗	u = color_table[cm][i - 1].u;
627		✗	v = color_table[cm][i - 1].v;
628		✗	} else if (a >= color_table[cm][i].a) {
629		✗	y = color_table[cm][i].y;
630		✗	u = color_table[cm][i].u;
631		✗	v = color_table[cm][i].v;
632			} else {
633		✗	float start = color_table[cm][i - 1].a;
634		✗	float end = color_table[cm][i].a;
635		✗	float lerpfrac = (a - start) / (end - start);
636		✗	y = color_table[cm][i - 1].y * (1.0f - lerpfrac)
637		✗	+ color_table[cm][i].y * lerpfrac;
638		✗	u = color_table[cm][i - 1].u * (1.0f - lerpfrac)
639		✗	+ color_table[cm][i].u * lerpfrac;
640		✗	v = color_table[cm][i - 1].v * (1.0f - lerpfrac)
641		✗	+ color_table[cm][i].v * lerpfrac;
642			}
643
644		✗	out[0] = y * yf;
645		✗	out[1] = u * uf;
646		✗	out[2] = v * vf;
647		✗	out[3] = a * af;
648			} else {
649		✗	out[0] = a * yf;
650		✗	out[1] = a * uf;
651		✗	out[2] = a * vf;
652		✗	out[3] = a * af;
653			}
654		✗	}
655
656		✗	static char *get_time(AVFilterContext *ctx, float seconds, int x)
657			{
658			char *units;
659
660		✗	if (x == 0)
661		✗	units = av_asprintf("0");
662		✗	else if (log10(seconds) > 6)
663		✗	units = av_asprintf("%.2fh", seconds / (60 * 60));
664		✗	else if (log10(seconds) > 3)
665		✗	units = av_asprintf("%.2fm", seconds / 60);
666			else
667		✗	units = av_asprintf("%.2fs", seconds);
668		✗	return units;
669			}
670
671		✗	static float log_scale(const float bin,
672			const float bmin, const float bmax,
673			const float min, const float max)
674			{
675		✗	return exp2f(((bin - bmin) / (bmax - bmin)) * (log2f(max) - log2f(min)) + log2f(min));
676			}
677
678		✗	static float get_hz(const float bin, const float bmax,
679			const float min, const float max,
680			int fscale)
681			{
682		✗	switch (fscale) {
683		✗	case F_LINEAR:
684		✗	return min + (bin / bmax) * (max - min);
685		✗	case F_LOG:
686		✗	return min + log_scale(bin, 0, bmax, 20.f, max - min);
687		✗	default:
688		✗	return 0.f;
689			}
690			}
691
692		✗	static float inv_log_scale(float bin,
693			float bmin, float bmax,
694			float min, float max)
695			{
696		✗	return (min * exp2f((bin * (log2f(max) - log2f(20.f))) / bmax) + min) * bmax / max;
697			}
698
699		✗	static float bin_pos(const int bin, const int num_bins, const float min, const float max)
700			{
701		✗	return inv_log_scale(bin, 0.f, num_bins, 20.f, max - min);
702			}
703
704		✗	static float get_scale(AVFilterContext *ctx, int scale, float a)
705			{
706		✗	ShowSpectrumContext *s = ctx->priv;
707		✗	const float dmin = s->dmin;
708		✗	const float dmax = s->dmax;
709
710		✗	a = av_clipf(a, dmin, dmax);
711		✗	if (scale != LOG)
712		✗	a = (a - dmin) / (dmax - dmin);
713
714		✗	switch (scale) {
715		✗	case LINEAR:
716		✗	break;
717		✗	case SQRT:
718		✗	a = sqrtf(a);
719		✗	break;
720		✗	case CBRT:
721		✗	a = cbrtf(a);
722		✗	break;
723		✗	case FOURTHRT:
724		✗	a = sqrtf(sqrtf(a));
725		✗	break;
726		✗	case FIFTHRT:
727		✗	a = powf(a, 0.2f);
728		✗	break;
729		✗	case LOG:
730		✗	a = (s->drange - s->limit + log10f(a) * 20.f) / s->drange;
731		✗	break;
732		✗	default:
733		✗	av_assert0(0);
734			}
735
736		✗	return a;
737			}
738
739		✗	static float get_iscale(AVFilterContext *ctx, int scale, float a)
740			{
741		✗	ShowSpectrumContext *s = ctx->priv;
742		✗	const float dmin = s->dmin;
743		✗	const float dmax = s->dmax;
744
745		✗	switch (scale) {
746		✗	case LINEAR:
747		✗	break;
748		✗	case SQRT:
749		✗	a = a * a;
750		✗	break;
751		✗	case CBRT:
752		✗	a = a * a * a;
753		✗	break;
754		✗	case FOURTHRT:
755		✗	a = a * a * a * a;
756		✗	break;
757		✗	case FIFTHRT:
758		✗	a = a * a * a * a * a;
759		✗	break;
760		✗	case LOG:
761		✗	a = expf(M_LN10 * (a * s->drange - s->drange + s->limit) / 20.f);
762		✗	break;
763		✗	default:
764		✗	av_assert0(0);
765			}
766
767		✗	if (scale != LOG)
768		✗	a = a * (dmax - dmin) + dmin;
769
770		✗	return a;
771			}
772
773		✗	static int draw_legend(AVFilterContext *ctx, uint64_t samples)
774			{
775		✗	ShowSpectrumContext *s = ctx->priv;
776		✗	AVFilterLink *inlink = ctx->inputs[0];
777		✗	AVFilterLink *outlink = ctx->outputs[0];
778		✗	int ch, y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
779		✗	int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
780		✗	float spp = samples / (float)sz;
781			char *text;
782			uint8_t *dst;
783			char chlayout_str[128];
784
785		✗	av_channel_layout_describe(&inlink->ch_layout, chlayout_str, sizeof(chlayout_str));
786
787		✗	text = av_asprintf("%d Hz | %s", inlink->sample_rate, chlayout_str);
788		✗	if (!text)
789		✗	return AVERROR(ENOMEM);
790
791		✗	drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
792		✗	drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, outlink->h - 10, text, 0);
793		✗	av_freep(&text);
794		✗	if (s->stop) {
795		✗	text = av_asprintf("Zoom: %d Hz - %d Hz", s->start, s->stop);
796		✗	if (!text)
797		✗	return AVERROR(ENOMEM);
798		✗	drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, 3, text, 0);
799		✗	av_freep(&text);
800			}
801
802		✗	dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
803		✗	for (x = 0; x < s->w + 1; x++)
804		✗	dst[x] = 200;
805		✗	dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
806		✗	for (x = 0; x < s->w + 1; x++)
807		✗	dst[x] = 200;
808		✗	for (y = 0; y < s->h + 2; y++) {
809		✗	dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
810		✗	dst[s->start_x - 1] = 200;
811		✗	dst[s->start_x + s->w] = 200;
812			}
813		✗	if (s->orientation == VERTICAL) {
814		✗	int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
815		✗	int hh = s->mode == SEPARATE ? -(s->h % s->nb_display_channels) + 1 : 1;
816		✗	for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
817		✗	for (y = 0; y < h; y += 20) {
818		✗	dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
819		✗	dst[s->start_x - 2] = 200;
820		✗	dst[s->start_x + s->w + 1] = 200;
821			}
822		✗	for (y = 0; y < h; y += 40) {
823		✗	dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
824		✗	dst[s->start_x - 3] = 200;
825		✗	dst[s->start_x + s->w + 2] = 200;
826			}
827		✗	dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
828		✗	for (x = 0; x < s->w; x+=40)
829		✗	dst[x] = 200;
830		✗	dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
831		✗	for (x = 0; x < s->w; x+=80)
832		✗	dst[x] = 200;
833		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
834		✗	for (x = 0; x < s->w; x+=40) {
835		✗	dst[x] = 200;
836			}
837		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
838		✗	for (x = 0; x < s->w; x+=80) {
839		✗	dst[x] = 200;
840			}
841		✗	for (y = 0; y < h; y += 40) {
842		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
843		✗	float hertz = get_hz(y, h, s->start, s->start + range, s->fscale);
844			char *units;
845
846		✗	if (hertz == 0)
847		✗	units = av_asprintf("DC");
848			else
849		✗	units = av_asprintf("%.2f", hertz);
850		✗	if (!units)
851		✗	return AVERROR(ENOMEM);
852
853		✗	drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4 - hh, units, 0);
854		✗	av_free(units);
855			}
856			}
857
858		✗	for (x = 0; x < s->w && s->single_pic; x+=80) {
859		✗	float seconds = x * spp / inlink->sample_rate;
860		✗	char *units = get_time(ctx, seconds, x);
861		✗	if (!units)
862		✗	return AVERROR(ENOMEM);
863
864		✗	drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->h + s->start_y + 6, units, 0);
865		✗	drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->start_y - 12, units, 0);
866		✗	av_free(units);
867			}
868
869		✗	drawtext(s->outpicref, outlink->w / 2 - 4 * 4, outlink->h - s->start_y / 2, "TIME", 0);
870		✗	drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 14 * 4, "FREQUENCY (Hz)", 1);
871			} else {
872		✗	int w = s->mode == SEPARATE ? s->w / s->nb_display_channels : s->w;
873		✗	for (y = 0; y < s->h; y += 20) {
874		✗	dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
875		✗	dst[s->start_x - 2] = 200;
876		✗	dst[s->start_x + s->w + 1] = 200;
877			}
878		✗	for (y = 0; y < s->h; y += 40) {
879		✗	dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
880		✗	dst[s->start_x - 3] = 200;
881		✗	dst[s->start_x + s->w + 2] = 200;
882			}
883		✗	for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
884		✗	dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
885		✗	for (x = 0; x < w; x+=40)
886		✗	dst[x] = 200;
887		✗	dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x + w * ch;
888		✗	for (x = 0; x < w; x+=80)
889		✗	dst[x] = 200;
890		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x + w * ch;
891		✗	for (x = 0; x < w; x+=40) {
892		✗	dst[x] = 200;
893			}
894		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
895		✗	for (x = 0; x < w; x+=80) {
896		✗	dst[x] = 200;
897			}
898		✗	for (x = 0; x < w - 79; x += 80) {
899		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
900		✗	float hertz = get_hz(x, w, s->start, s->start + range, s->fscale);
901			char *units;
902
903		✗	if (hertz == 0)
904		✗	units = av_asprintf("DC");
905			else
906		✗	units = av_asprintf("%.2f", hertz);
907		✗	if (!units)
908		✗	return AVERROR(ENOMEM);
909
910		✗	drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->start_y - 12, units, 0);
911		✗	drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->h + s->start_y + 6, units, 0);
912		✗	av_free(units);
913			}
914			}
915		✗	for (y = 0; y < s->h && s->single_pic; y+=40) {
916		✗	float seconds = y * spp / inlink->sample_rate;
917		✗	char *units = get_time(ctx, seconds, x);
918		✗	if (!units)
919		✗	return AVERROR(ENOMEM);
920
921		✗	drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, s->start_y + y - 4, units, 0);
922		✗	av_free(units);
923			}
924		✗	drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 4 * 4, "TIME", 1);
925		✗	drawtext(s->outpicref, outlink->w / 2 - 14 * 4, outlink->h - s->start_y / 2, "FREQUENCY (Hz)", 0);
926			}
927
928		✗	for (ch = 0; ch < (multi ? s->nb_display_channels : 1); ch++) {
929		✗	int h = multi ? s->h / s->nb_display_channels : s->h;
930
931		✗	for (y = 0; y < h; y++) {
932		✗	float out[4] = { 0., 127.5, 127.5, 0.f};
933			int chn;
934
935		✗	for (chn = 0; chn < (s->mode == SEPARATE ? 1 : s->nb_display_channels); chn++) {
936			float yf, uf, vf;
937		✗	int channel = (multi) ? s->nb_display_channels - ch - 1 : chn;
938			float lout[4];
939
940		✗	color_range(s, channel, &yf, &uf, &vf);
941		✗	pick_color(s, yf, uf, vf, y / (float)h, lout);
942		✗	out[0] += lout[0];
943		✗	out[1] += lout[1];
944		✗	out[2] += lout[2];
945		✗	out[3] += lout[3];
946			}
947		✗	memset(s->outpicref->data[0]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0] + s->w + s->start_x + 20, av_clip_uint8(out[0]), 10);
948		✗	memset(s->outpicref->data[1]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[1] + s->w + s->start_x + 20, av_clip_uint8(out[1]), 10);
949		✗	memset(s->outpicref->data[2]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[2] + s->w + s->start_x + 20, av_clip_uint8(out[2]), 10);
950		✗	if (s->outpicref->data[3])
951		✗	memset(s->outpicref->data[3]+(s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[3] + s->w + s->start_x + 20, av_clip_uint8(out[3]), 10);
952			}
953
954		✗	for (y = 0; ch == 0 && y < h + 5; y += 25) {
955		✗	const float a = av_clipf(1.f - y / (float)(h - 1), 0.f, 1.f);
956		✗	const float value = s->scale == LOG ? log10f(get_iscale(ctx, s->scale, a)) * 20.f : get_iscale(ctx, s->scale, a);
957			char scale_fmt[32];
958
959		✗	snprintf(scale_fmt, sizeof(scale_fmt),
960		✗	s->scale == LOG ? "%.0f" : "%.3f", value);
961		✗	drawtext(s->outpicref, s->w + s->start_x + 35, s->start_y + y - 3, scale_fmt, 0);
962			}
963			}
964
965		✗	if (s->scale == LOG)
966		✗	drawtext(s->outpicref, s->w + s->start_x + 22, s->start_y + s->h + 20, "dBFS", 0);
967
968		✗	return 0;
969			}
970
971		✗	static float get_value(AVFilterContext *ctx, int ch, int y)
972			{
973		✗	ShowSpectrumContext *s = ctx->priv;
974		✗	float *magnitudes = s->magnitudes[ch];
975		✗	float *phases = s->phases[ch];
976			float a;
977
978		✗	switch (s->data) {
979		✗	case D_MAGNITUDE:
980			/* get magnitude */
981		✗	a = magnitudes[y];
982		✗	break;
983		✗	case D_UPHASE:
984			case D_PHASE:
985			/* get phase */
986		✗	a = phases[y];
987		✗	break;
988		✗	default:
989		✗	av_assert0(0);
990			}
991
992		✗	return av_clipf(get_scale(ctx, s->scale, a), 0.f, 1.f);
993			}
994
995		✗	static int plot_channel_lin(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
996			{
997		✗	ShowSpectrumContext *s = ctx->priv;
998		✗	const int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
999		✗	const int ch = jobnr;
1000			float yf, uf, vf;
1001			int y;
1002
1003			/* decide color range */
1004		✗	color_range(s, ch, &yf, &uf, &vf);
1005
1006			/* draw the channel */
1007		✗	for (y = 0; y < h; y++) {
1008		✗	int row = (s->mode == COMBINED) ? y : ch * h + y;
1009		✗	float *out = &s->color_buffer[ch][4 * row];
1010		✗	float a = get_value(ctx, ch, y);
1011
1012		✗	pick_color(s, yf, uf, vf, a, out);
1013			}
1014
1015		✗	return 0;
1016			}
1017
1018		✗	static int plot_channel_log(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1019			{
1020		✗	ShowSpectrumContext *s = ctx->priv;
1021		✗	AVFilterLink *inlink = ctx->inputs[0];
1022		✗	const int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
1023		✗	const int ch = jobnr;
1024			float yf, uf, vf;
1025
1026			/* decide color range */
1027		✗	color_range(s, ch, &yf, &uf, &vf);
1028
1029			/* draw the channel */
1030		✗	for (int yy = 0; yy < h; yy++) {
1031		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
1032		✗	float pos = bin_pos(yy, h, s->start, s->start + range);
1033		✗	float delta = pos - floorf(pos);
1034			float a0, a1;
1035
1036		✗	a0 = get_value(ctx, ch, av_clip(pos, 0, h-1));
1037		✗	a1 = get_value(ctx, ch, av_clip(pos+1, 0, h-1));
1038			{
1039		✗	int row = (s->mode == COMBINED) ? yy : ch * h + yy;
1040		✗	float *out = &s->color_buffer[ch][4 * row];
1041
1042		✗	pick_color(s, yf, uf, vf, delta * a1 + (1.f - delta) * a0, out);
1043			}
1044			}
1045
1046		✗	return 0;
1047			}
1048
1049		✗	static int config_output(AVFilterLink *outlink)
1050			{
1051		✗	FilterLink *l = ff_filter_link(outlink);
1052		✗	AVFilterContext *ctx = outlink->src;
1053		✗	AVFilterLink *inlink = ctx->inputs[0];
1054		✗	ShowSpectrumContext *s = ctx->priv;
1055			int i, fft_size, h, w, ret;
1056			float overlap;
1057
1058		✗	s->old_pts = AV_NOPTS_VALUE;
1059		✗	s->dmax = expf(s->limit * M_LN10 / 20.f);
1060		✗	s->dmin = expf((s->limit - s->drange) * M_LN10 / 20.f);
1061
1062		✗	switch (s->fscale) {
1063		✗	case F_LINEAR: s->plot_channel = plot_channel_lin; break;
1064		✗	case F_LOG: s->plot_channel = plot_channel_log; break;
1065		✗	default: return AVERROR_BUG;
1066			}
1067
1068		✗	s->stop = FFMIN(s->stop, inlink->sample_rate / 2);
1069		✗	if ((s->stop || s->start) && s->stop <= s->start) {
1070		✗	av_log(ctx, AV_LOG_ERROR, "Stop frequency should be greater than start.\n");
1071		✗	return AVERROR(EINVAL);
1072			}
1073
1074		✗	if (!strcmp(ctx->filter->name, "showspectrumpic"))
1075		✗	s->single_pic = 1;
1076
1077		✗	outlink->w = s->w;
1078		✗	outlink->h = s->h;
1079		✗	outlink->sample_aspect_ratio = (AVRational){1,1};
1080
1081		✗	if (s->legend) {
1082		✗	s->start_x = (log10(inlink->sample_rate) + 1) * 25;
1083		✗	s->start_y = 64;
1084		✗	outlink->w += s->start_x * 2;
1085		✗	outlink->h += s->start_y * 2;
1086			}
1087
1088		✗	h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->ch_layout.nb_channels;
1089		✗	w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->ch_layout.nb_channels;
1090		✗	s->channel_height = h;
1091		✗	s->channel_width = w;
1092
1093		✗	if (s->orientation == VERTICAL) {
1094			/* FFT window size (precision) according to the requested output frame height */
1095		✗	fft_size = h * 2;
1096			} else {
1097			/* FFT window size (precision) according to the requested output frame width */
1098		✗	fft_size = w * 2;
1099			}
1100
1101		✗	s->win_size = fft_size;
1102		✗	s->buf_size = FFALIGN(s->win_size << (!!s->stop), av_cpu_max_align());
1103
1104		✗	if (!s->fft) {
1105		✗	s->fft = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->fft));
1106		✗	if (!s->fft)
1107		✗	return AVERROR(ENOMEM);
1108			}
1109
1110		✗	if (s->stop) {
1111		✗	if (!s->ifft) {
1112		✗	s->ifft = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->ifft));
1113		✗	if (!s->ifft)
1114		✗	return AVERROR(ENOMEM);
1115			}
1116			}
1117
1118			/* (re-)configuration if the video output changed (or first init) */
1119		✗	if (fft_size != s->fft_size) {
1120			AVFrame *outpicref;
1121
1122		✗	s->fft_size = fft_size;
1123
1124			/* FFT buffers: x2 for each (display) channel buffer.
1125			* Note: we use free and malloc instead of a realloc-like function to
1126			* make sure the buffer is aligned in memory for the FFT functions. */
1127		✗	for (i = 0; i < s->nb_display_channels; i++) {
1128		✗	if (s->stop) {
1129		✗	av_tx_uninit(&s->ifft[i]);
1130		✗	av_freep(&s->fft_scratch[i]);
1131			}
1132		✗	av_tx_uninit(&s->fft[i]);
1133		✗	av_freep(&s->fft_in[i]);
1134		✗	av_freep(&s->fft_data[i]);
1135			}
1136		✗	av_freep(&s->fft_data);
1137
1138		✗	s->nb_display_channels = inlink->ch_layout.nb_channels;
1139		✗	for (i = 0; i < s->nb_display_channels; i++) {
1140		✗	float scale = 1.f;
1141
1142		✗	ret = av_tx_init(&s->fft[i], &s->tx_fn, AV_TX_FLOAT_FFT, 0, fft_size << (!!s->stop), &scale, 0);
1143		✗	if (ret < 0) {
1144		✗	av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
1145			"The window size might be too high.\n");
1146		✗	return ret;
1147			}
1148		✗	if (s->stop) {
1149		✗	ret = av_tx_init(&s->ifft[i], &s->itx_fn, AV_TX_FLOAT_FFT, 1, fft_size << (!!s->stop), &scale, 0);
1150		✗	if (ret < 0) {
1151		✗	av_log(ctx, AV_LOG_ERROR, "Unable to create Inverse FFT context. "
1152			"The window size might be too high.\n");
1153		✗	return ret;
1154			}
1155			}
1156			}
1157
1158		✗	s->magnitudes = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes));
1159		✗	if (!s->magnitudes)
1160		✗	return AVERROR(ENOMEM);
1161		✗	for (i = 0; i < s->nb_display_channels; i++) {
1162		✗	s->magnitudes[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->magnitudes));
1163		✗	if (!s->magnitudes[i])
1164		✗	return AVERROR(ENOMEM);
1165			}
1166
1167		✗	s->phases = av_calloc(s->nb_display_channels, sizeof(*s->phases));
1168		✗	if (!s->phases)
1169		✗	return AVERROR(ENOMEM);
1170		✗	for (i = 0; i < s->nb_display_channels; i++) {
1171		✗	s->phases[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->phases));
1172		✗	if (!s->phases[i])
1173		✗	return AVERROR(ENOMEM);
1174			}
1175
1176		✗	av_freep(&s->color_buffer);
1177		✗	s->color_buffer = av_calloc(s->nb_display_channels, sizeof(*s->color_buffer));
1178		✗	if (!s->color_buffer)
1179		✗	return AVERROR(ENOMEM);
1180		✗	for (i = 0; i < s->nb_display_channels; i++) {
1181		✗	s->color_buffer[i] = av_calloc(s->orientation == VERTICAL ? s->h * 4 : s->w * 4, sizeof(**s->color_buffer));
1182		✗	if (!s->color_buffer[i])
1183		✗	return AVERROR(ENOMEM);
1184			}
1185
1186		✗	s->fft_in = av_calloc(s->nb_display_channels, sizeof(*s->fft_in));
1187		✗	if (!s->fft_in)
1188		✗	return AVERROR(ENOMEM);
1189		✗	s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data));
1190		✗	if (!s->fft_data)
1191		✗	return AVERROR(ENOMEM);
1192		✗	s->fft_scratch = av_calloc(s->nb_display_channels, sizeof(*s->fft_scratch));
1193		✗	if (!s->fft_scratch)
1194		✗	return AVERROR(ENOMEM);
1195		✗	for (i = 0; i < s->nb_display_channels; i++) {
1196		✗	s->fft_in[i] = av_calloc(s->buf_size, sizeof(**s->fft_in));
1197		✗	if (!s->fft_in[i])
1198		✗	return AVERROR(ENOMEM);
1199
1200		✗	s->fft_data[i] = av_calloc(s->buf_size, sizeof(**s->fft_data));
1201		✗	if (!s->fft_data[i])
1202		✗	return AVERROR(ENOMEM);
1203
1204		✗	s->fft_scratch[i] = av_calloc(s->buf_size, sizeof(**s->fft_scratch));
1205		✗	if (!s->fft_scratch[i])
1206		✗	return AVERROR(ENOMEM);
1207			}
1208
1209			/* pre-calc windowing function */
1210		✗	s->window_func_lut =
1211		✗	av_realloc_f(s->window_func_lut, s->win_size,
1212			sizeof(*s->window_func_lut));
1213		✗	if (!s->window_func_lut)
1214		✗	return AVERROR(ENOMEM);
1215		✗	generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
1216		✗	if (s->overlap == 1)
1217		✗	s->overlap = overlap;
1218		✗	s->hop_size = (1.f - s->overlap) * s->win_size;
1219		✗	if (s->hop_size < 1) {
1220		✗	av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
1221		✗	return AVERROR(EINVAL);
1222			}
1223
1224		✗	for (s->win_scale = 0, i = 0; i < s->win_size; i++) {
1225		✗	s->win_scale += s->window_func_lut[i] * s->window_func_lut[i];
1226			}
1227		✗	s->win_scale = 1.f / sqrtf(s->win_scale);
1228
1229			/* prepare the initial picref buffer (black frame) */
1230		✗	av_frame_free(&s->outpicref);
1231		✗	s->outpicref = outpicref =
1232		✗	ff_get_video_buffer(outlink, outlink->w, outlink->h);
1233		✗	if (!outpicref)
1234		✗	return AVERROR(ENOMEM);
1235		✗	outpicref->sample_aspect_ratio = (AVRational){1,1};
1236		✗	for (i = 0; i < outlink->h; i++) {
1237		✗	memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
1238		✗	memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
1239		✗	memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
1240		✗	if (outpicref->data[3])
1241		✗	memset(outpicref->data[3] + i * outpicref->linesize[3], 0, outlink->w);
1242			}
1243		✗	outpicref->color_range = AVCOL_RANGE_JPEG;
1244
1245		✗	if (!s->single_pic && s->legend)
1246		✗	draw_legend(ctx, 0);
1247			}
1248
1249		✗	if ((s->orientation == VERTICAL && s->xpos >= s->w) ||
1250		✗	(s->orientation == HORIZONTAL && s->xpos >= s->h))
1251		✗	s->xpos = 0;
1252
1253		✗	if (s->sliding == LREPLACE) {
1254		✗	if (s->orientation == VERTICAL)
1255		✗	s->xpos = s->w - 1;
1256		✗	if (s->orientation == HORIZONTAL)
1257		✗	s->xpos = s->h - 1;
1258			}
1259
1260		✗	s->auto_frame_rate = av_make_q(inlink->sample_rate, s->hop_size);
1261		✗	if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
1262		✗	s->auto_frame_rate = av_mul_q(s->auto_frame_rate, av_make_q(1, s->w));
1263		✗	if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
1264		✗	s->auto_frame_rate = av_mul_q(s->auto_frame_rate, av_make_q(1, s->h));
1265		✗	if (!s->single_pic && strcmp(s->rate_str, "auto")) {
1266		✗	int ret = av_parse_video_rate(&s->frame_rate, s->rate_str);
1267		✗	if (ret < 0)
1268		✗	return ret;
1269		✗	} else if (s->single_pic) {
1270		✗	s->frame_rate = av_make_q(1, 1);
1271			} else {
1272		✗	s->frame_rate = s->auto_frame_rate;
1273			}
1274		✗	l->frame_rate = s->frame_rate;
1275		✗	outlink->time_base = av_inv_q(l->frame_rate);
1276
1277		✗	if (s->orientation == VERTICAL) {
1278		✗	s->combine_buffer =
1279		✗	av_realloc_f(s->combine_buffer, s->h * 4,
1280			sizeof(*s->combine_buffer));
1281			} else {
1282		✗	s->combine_buffer =
1283		✗	av_realloc_f(s->combine_buffer, s->w * 4,
1284			sizeof(*s->combine_buffer));
1285			}
1286		✗	if (!s->combine_buffer)
1287		✗	return AVERROR(ENOMEM);
1288
1289		✗	av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d FFT window size:%d\n",
1290			s->w, s->h, s->win_size);
1291
1292		✗	s->in_frame = ff_get_audio_buffer(inlink, s->win_size);
1293		✗	if (!s->in_frame)
1294		✗	return AVERROR(ENOMEM);
1295
1296		✗	s->frames = av_fast_realloc(NULL, &s->frames_size,
1297			DEFAULT_LENGTH * sizeof(*(s->frames)));
1298		✗	if (!s->frames)
1299		✗	return AVERROR(ENOMEM);
1300
1301		✗	return 0;
1302			}
1303
1304			#define RE(y, ch) s->fft_data[ch][y].re
1305			#define IM(y, ch) s->fft_data[ch][y].im
1306			#define MAGNITUDE(y, ch) hypotf(RE(y, ch), IM(y, ch))
1307			#define PHASE(y, ch) atan2f(IM(y, ch), RE(y, ch))
1308
1309		✗	static int calc_channel_magnitudes(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1310			{
1311		✗	ShowSpectrumContext *s = ctx->priv;
1312		✗	const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
1313		✗	int y, h = s->orientation == VERTICAL ? s->h : s->w;
1314		✗	const float f = s->gain * w;
1315		✗	const int ch = jobnr;
1316		✗	float *magnitudes = s->magnitudes[ch];
1317
1318		✗	for (y = 0; y < h; y++)
1319		✗	magnitudes[y] = MAGNITUDE(y, ch) * f;
1320
1321		✗	return 0;
1322			}
1323
1324		✗	static int calc_channel_phases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1325			{
1326		✗	ShowSpectrumContext *s = ctx->priv;
1327		✗	const int h = s->orientation == VERTICAL ? s->h : s->w;
1328		✗	const int ch = jobnr;
1329		✗	float *phases = s->phases[ch];
1330			int y;
1331
1332		✗	for (y = 0; y < h; y++)
1333		✗	phases[y] = (PHASE(y, ch) / M_PI + 1) / 2;
1334
1335		✗	return 0;
1336			}
1337
1338		✗	static void unwrap(float *x, int N, float tol, float *mi, float *ma)
1339			{
1340		✗	const float rng = 2.f * M_PI;
1341		✗	float prev_p = 0.f;
1342		✗	float max = -FLT_MAX;
1343		✗	float min = FLT_MAX;
1344
1345		✗	for (int i = 0; i < N; i++) {
1346		✗	const float d = x[FFMIN(i + 1, N)] - x[i];
1347		✗	const float p = ceilf(fabsf(d) / rng) * rng * (((d < tol) > 0.f) - ((d > -tol) > 0.f));
1348
1349		✗	x[i] += p + prev_p;
1350		✗	prev_p += p;
1351		✗	max = fmaxf(x[i], max);
1352		✗	min = fminf(x[i], min);
1353			}
1354
1355		✗	*mi = min;
1356		✗	*ma = max;
1357		✗	}
1358
1359		✗	static int calc_channel_uphases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1360			{
1361		✗	ShowSpectrumContext *s = ctx->priv;
1362		✗	const int h = s->orientation == VERTICAL ? s->h : s->w;
1363		✗	const int ch = jobnr;
1364		✗	float *phases = s->phases[ch];
1365			float min, max, scale;
1366			int y;
1367
1368		✗	for (y = 0; y < h; y++)
1369		✗	phases[y] = PHASE(y, ch);
1370		✗	unwrap(phases, h, M_PI, &min, &max);
1371		✗	scale = 1.f / (max - min + FLT_MIN);
1372		✗	for (y = 0; y < h; y++)
1373		✗	phases[y] = fabsf((phases[y] - min) * scale);
1374
1375		✗	return 0;
1376			}
1377
1378		✗	static void acalc_magnitudes(ShowSpectrumContext *s)
1379			{
1380		✗	const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
1381		✗	int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
1382		✗	const float f = s->gain * w;
1383
1384		✗	for (ch = 0; ch < s->nb_display_channels; ch++) {
1385		✗	float *magnitudes = s->magnitudes[ch];
1386
1387		✗	for (y = 0; y < h; y++)
1388		✗	magnitudes[y] += MAGNITUDE(y, ch) * f;
1389			}
1390		✗	}
1391
1392		✗	static void scale_magnitudes(ShowSpectrumContext *s, float scale)
1393			{
1394		✗	int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
1395
1396		✗	for (ch = 0; ch < s->nb_display_channels; ch++) {
1397		✗	float *magnitudes = s->magnitudes[ch];
1398
1399		✗	for (y = 0; y < h; y++)
1400		✗	magnitudes[y] *= scale;
1401			}
1402		✗	}
1403
1404		✗	static void clear_combine_buffer(ShowSpectrumContext *s, int size)
1405			{
1406			int y;
1407
1408		✗	for (y = 0; y < size; y++) {
1409		✗	s->combine_buffer[4 * y ] = 0;
1410		✗	s->combine_buffer[4 * y + 1] = 127.5;
1411		✗	s->combine_buffer[4 * y + 2] = 127.5;
1412		✗	s->combine_buffer[4 * y + 3] = 0;
1413			}
1414		✗	}
1415
1416		✗	static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
1417			{
1418		✗	AVFilterContext *ctx = inlink->dst;
1419		✗	AVFilterLink *outlink = ctx->outputs[0];
1420		✗	ShowSpectrumContext *s = ctx->priv;
1421		✗	AVFrame *outpicref = s->outpicref;
1422		✗	int ret, plane, x, y, z = s->orientation == VERTICAL ? s->h : s->w;
1423		✗	const int alpha = outpicref->data[3] != NULL;
1424
1425			/* fill a new spectrum column */
1426			/* initialize buffer for combining to black */
1427		✗	clear_combine_buffer(s, z);
1428
1429		✗	ff_filter_execute(ctx, s->plot_channel, NULL, NULL, s->nb_display_channels);
1430
1431		✗	for (y = 0; y < z * 4; y++) {
1432		✗	for (x = 0; x < s->nb_display_channels; x++) {
1433		✗	s->combine_buffer[y] += s->color_buffer[x][y];
1434			}
1435			}
1436
1437		✗	ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
1438		✗	if (ret < 0)
1439		✗	return ret;
1440		✗	outpicref = s->outpicref;
1441			/* copy to output */
1442		✗	if (s->orientation == VERTICAL) {
1443		✗	if (s->sliding == SCROLL) {
1444		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1445		✗	for (y = 0; y < s->h; y++) {
1446		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1447		✗	(y + s->start_y) * outpicref->linesize[plane];
1448		✗	memmove(p, p + 1, s->w - 1);
1449			}
1450			}
1451		✗	s->xpos = s->w - 1;
1452		✗	} else if (s->sliding == RSCROLL) {
1453		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1454		✗	for (y = 0; y < s->h; y++) {
1455		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1456		✗	(y + s->start_y) * outpicref->linesize[plane];
1457		✗	memmove(p + 1, p, s->w - 1);
1458			}
1459			}
1460		✗	s->xpos = 0;
1461			}
1462		✗	for (plane = 0; plane < 3; plane++) {
1463		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1464		✗	(outlink->h - 1 - s->start_y) * outpicref->linesize[plane] +
1465		✗	s->xpos;
1466		✗	for (y = 0; y < s->h; y++) {
1467		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * y + plane], 0, 255));
1468		✗	p -= outpicref->linesize[plane];
1469			}
1470			}
1471		✗	if (alpha) {
1472		✗	uint8_t *p = outpicref->data[3] + s->start_x +
1473		✗	(outlink->h - 1 - s->start_y) * outpicref->linesize[3] +
1474		✗	s->xpos;
1475		✗	for (y = 0; y < s->h; y++) {
1476		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * y + 3], 0, 255));
1477		✗	p -= outpicref->linesize[3];
1478			}
1479			}
1480			} else {
1481		✗	if (s->sliding == SCROLL) {
1482		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1483		✗	for (y = 1; y < s->h; y++) {
1484		✗	memmove(outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
1485		✗	outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
1486		✗	s->w);
1487			}
1488			}
1489		✗	s->xpos = s->h - 1;
1490		✗	} else if (s->sliding == RSCROLL) {
1491		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1492		✗	for (y = s->h - 1; y >= 1; y--) {
1493		✗	memmove(outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
1494		✗	outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
1495		✗	s->w);
1496			}
1497			}
1498		✗	s->xpos = 0;
1499			}
1500		✗	for (plane = 0; plane < 3; plane++) {
1501		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1502		✗	(s->xpos + s->start_y) * outpicref->linesize[plane];
1503		✗	for (x = 0; x < s->w; x++) {
1504		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * x + plane], 0, 255));
1505		✗	p++;
1506			}
1507			}
1508		✗	if (alpha) {
1509		✗	uint8_t *p = outpicref->data[3] + s->start_x +
1510		✗	(s->xpos + s->start_y) * outpicref->linesize[3];
1511		✗	for (x = 0; x < s->w; x++) {
1512		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * x + 3], 0, 255));
1513		✗	p++;
1514			}
1515			}
1516			}
1517
1518		✗	if (s->sliding != FULLFRAME || s->xpos == 0)
1519		✗	s->pts = outpicref->pts = av_rescale_q(s->in_pts, inlink->time_base, outlink->time_base);
1520
1521		✗	if (s->sliding == LREPLACE) {
1522		✗	s->xpos--;
1523		✗	if (s->orientation == VERTICAL && s->xpos < 0)
1524		✗	s->xpos = s->w - 1;
1525		✗	if (s->orientation == HORIZONTAL && s->xpos < 0)
1526		✗	s->xpos = s->h - 1;
1527			} else {
1528		✗	s->xpos++;
1529		✗	if (s->orientation == VERTICAL && s->xpos >= s->w)
1530		✗	s->xpos = 0;
1531		✗	if (s->orientation == HORIZONTAL && s->xpos >= s->h)
1532		✗	s->xpos = 0;
1533			}
1534
1535		✗	if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
1536		✗	if (s->old_pts < outpicref->pts || s->sliding == FULLFRAME ||
1537		✗	(s->eof && ff_inlink_queued_samples(inlink) <= s->hop_size)) {
1538			AVFrame *clone;
1539
1540		✗	if (s->legend) {
1541		✗	char *units = get_time(ctx, insamples->pts /(float)inlink->sample_rate, x);
1542		✗	if (!units)
1543		✗	return AVERROR(ENOMEM);
1544
1545		✗	if (s->orientation == VERTICAL) {
1546		✗	for (y = 0; y < 10; y++) {
1547		✗	memset(s->outpicref->data[0] + outlink->w / 2 - 4 * s->old_len +
1548		✗	(outlink->h - s->start_y / 2 - 20 + y) * s->outpicref->linesize[0], 0, 10 * s->old_len);
1549			}
1550		✗	drawtext(s->outpicref,
1551		✗	outlink->w / 2 - 4 * strlen(units),
1552		✗	outlink->h - s->start_y / 2 - 20,
1553			units, 0);
1554			} else {
1555		✗	for (y = 0; y < 10 * s->old_len; y++) {
1556		✗	memset(s->outpicref->data[0] + s->start_x / 7 + 20 +
1557		✗	(outlink->h / 2 - 4 * s->old_len + y) * s->outpicref->linesize[0], 0, 10);
1558			}
1559		✗	drawtext(s->outpicref,
1560		✗	s->start_x / 7 + 20,
1561		✗	outlink->h / 2 - 4 * strlen(units),
1562			units, 1);
1563			}
1564		✗	s->old_len = strlen(units);
1565		✗	av_free(units);
1566			}
1567		✗	s->old_pts = outpicref->pts;
1568		✗	clone = av_frame_clone(s->outpicref);
1569		✗	if (!clone)
1570		✗	return AVERROR(ENOMEM);
1571		✗	ret = ff_filter_frame(outlink, clone);
1572		✗	if (ret < 0)
1573		✗	return ret;
1574		✗	return 0;
1575			}
1576			}
1577
1578		✗	return 1;
1579			}
1580
1581			#if CONFIG_SHOWSPECTRUM_FILTER
1582
1583		✗	static int activate(AVFilterContext *ctx)
1584			{
1585		✗	AVFilterLink *inlink = ctx->inputs[0];
1586		✗	AVFilterLink *outlink = ctx->outputs[0];
1587		✗	ShowSpectrumContext *s = ctx->priv;
1588			int ret, status;
1589			int64_t pts;
1590
1591		✗	FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
1592
1593		✗	if (s->outpicref && ff_inlink_queued_samples(inlink) > 0) {
1594			AVFrame *fin;
1595
1596		✗	ret = ff_inlink_consume_samples(inlink, s->hop_size, s->hop_size, &fin);
1597		✗	if (ret < 0)
1598		✗	return ret;
1599		✗	if (ret > 0) {
1600		✗	ff_filter_execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
1601
1602		✗	if (s->data == D_MAGNITUDE)
1603		✗	ff_filter_execute(ctx, calc_channel_magnitudes, NULL, NULL, s->nb_display_channels);
1604
1605		✗	if (s->data == D_PHASE)
1606		✗	ff_filter_execute(ctx, calc_channel_phases, NULL, NULL, s->nb_display_channels);
1607
1608		✗	if (s->data == D_UPHASE)
1609		✗	ff_filter_execute(ctx, calc_channel_uphases, NULL, NULL, s->nb_display_channels);
1610
1611		✗	if (s->sliding != FULLFRAME || s->xpos == 0)
1612		✗	s->in_pts = fin->pts;
1613		✗	ret = plot_spectrum_column(inlink, fin);
1614		✗	av_frame_free(&fin);
1615		✗	if (ret <= 0)
1616		✗	return ret;
1617			}
1618			}
1619
1620		✗	if (s->eof && s->sliding == FULLFRAME &&
1621		✗	s->xpos > 0 && s->outpicref) {
1622
1623		✗	if (s->orientation == VERTICAL) {
1624		✗	for (int i = 0; i < outlink->h; i++) {
1625		✗	memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos);
1626		✗	memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos);
1627		✗	memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos);
1628		✗	if (s->outpicref->data[3])
1629		✗	memset(s->outpicref->data[3] + i * s->outpicref->linesize[3] + s->xpos, 0, outlink->w - s->xpos);
1630			}
1631			} else {
1632		✗	for (int i = s->xpos; i < outlink->h; i++) {
1633		✗	memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w);
1634		✗	memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w);
1635		✗	memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w);
1636		✗	if (s->outpicref->data[3])
1637		✗	memset(s->outpicref->data[3] + i * s->outpicref->linesize[3], 0, outlink->w);
1638			}
1639			}
1640		✗	s->outpicref->pts = av_rescale_q(s->in_pts, inlink->time_base, outlink->time_base);
1641		✗	pts = s->outpicref->pts;
1642		✗	ret = ff_filter_frame(outlink, s->outpicref);
1643		✗	s->outpicref = NULL;
1644		✗	ff_outlink_set_status(outlink, AVERROR_EOF, pts);
1645		✗	return 0;
1646			}
1647
1648		✗	if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
1649		✗	s->eof = status == AVERROR_EOF;
1650		✗	ff_filter_set_ready(ctx, 100);
1651		✗	return 0;
1652			}
1653
1654		✗	if (s->eof) {
1655		✗	ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
1656		✗	return 0;
1657			}
1658
1659		✗	if (ff_inlink_queued_samples(inlink) >= s->hop_size) {
1660		✗	ff_filter_set_ready(ctx, 10);
1661		✗	return 0;
1662			}
1663
1664		✗	if (ff_outlink_frame_wanted(outlink)) {
1665		✗	ff_inlink_request_frame(inlink);
1666		✗	return 0;
1667			}
1668
1669		✗	return FFERROR_NOT_READY;
1670			}
1671
1672			static const AVFilterPad showspectrum_outputs[] = {
1673			{
1674			.name = "default",
1675			.type = AVMEDIA_TYPE_VIDEO,
1676			.config_props = config_output,
1677			},
1678			};
1679
1680			const FFFilter ff_avf_showspectrum = {
1681			.p.name = "showspectrum",
1682			.p.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output."),
1683			.p.priv_class = &showspectrum_class,
1684			.p.flags = AVFILTER_FLAG_SLICE_THREADS,
1685			.uninit = uninit,
1686			.priv_size = sizeof(ShowSpectrumContext),
1687			FILTER_INPUTS(ff_audio_default_filterpad),
1688			FILTER_OUTPUTS(showspectrum_outputs),
1689			FILTER_QUERY_FUNC2(query_formats),
1690			.activate = activate,
1691			};
1692			#endif // CONFIG_SHOWSPECTRUM_FILTER
1693
1694			#if CONFIG_SHOWSPECTRUMPIC_FILTER
1695
1696			static const AVOption showspectrumpic_options[] = {
1697			{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
1698			{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
1699			{ "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_MODES-1, FLAGS, .unit = "mode" },
1700			{ "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, .unit = "mode" },
1701			{ "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, .unit = "mode" },
1702			{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=INTENSITY}, 0, NB_CLMODES-1, FLAGS, .unit = "color" },
1703			{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, .unit = "color" },
1704			{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, .unit = "color" },
1705			{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, .unit = "color" },
1706			{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, .unit = "color" },
1707			{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, .unit = "color" },
1708			{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, .unit = "color" },
1709			{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, .unit = "color" },
1710			{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, .unit = "color" },
1711			{ "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, .unit = "color" },
1712			{ "magma", "magma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MAGMA}, 0, 0, FLAGS, .unit = "color" },
1713			{ "green", "green based coloring", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, FLAGS, .unit = "color" },
1714			{ "viridis", "viridis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=VIRIDIS}, 0, 0, FLAGS, .unit = "color" },
1715			{ "plasma", "plasma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=PLASMA}, 0, 0, FLAGS, .unit = "color" },
1716			{ "cividis", "cividis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=CIVIDIS}, 0, 0, FLAGS, .unit = "color" },
1717			{ "terrain", "terrain based coloring", 0, AV_OPT_TYPE_CONST, {.i64=TERRAIN}, 0, 0, FLAGS, .unit = "color" },
1718			{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, .unit = "scale" },
1719			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "scale" },
1720			{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, .unit = "scale" },
1721			{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, .unit = "scale" },
1722			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "scale" },
1723			{ "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, .unit = "scale" },
1724			{ "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, .unit = "scale" },
1725			{ "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=F_LINEAR}, 0, NB_FSCALES-1, FLAGS, .unit = "fscale" },
1726			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=F_LINEAR}, 0, 0, FLAGS, .unit = "fscale" },
1727			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=F_LOG}, 0, 0, FLAGS, .unit = "fscale" },
1728			{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
1729			WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_HANNING),
1730			{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, .unit = "orientation" },
1731			{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, .unit = "orientation" },
1732			{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, .unit = "orientation" },
1733			{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
1734			{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
1735			{ "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
1736			{ "start", "start frequency", OFFSET(start), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
1737			{ "stop", "stop frequency", OFFSET(stop), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
1738			{ "drange", "set dynamic range in dBFS", OFFSET(drange), AV_OPT_TYPE_FLOAT, {.dbl = 120}, 10, 200, FLAGS },
1739			{ "limit", "set upper limit in dBFS", OFFSET(limit), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -100, 100, FLAGS },
1740			{ "opacity", "set opacity strength", OFFSET(opacity_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 10, FLAGS },
1741			{ NULL }
1742			};
1743
1744			AVFILTER_DEFINE_CLASS(showspectrumpic);
1745
1746		✗	static int showspectrumpic_request_frame(AVFilterLink *outlink)
1747			{
1748		✗	AVFilterContext *ctx = outlink->src;
1749		✗	ShowSpectrumContext *s = ctx->priv;
1750		✗	AVFilterLink *inlink = ctx->inputs[0];
1751			int ret;
1752
1753		✗	ret = ff_request_frame(inlink);
1754		✗	if (ret == AVERROR_EOF && s->outpicref && s->samples > 0) {
1755		✗	int consumed = 0;
1756		✗	int x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
1757		✗	unsigned int nb_frame = 0;
1758			int ch, spf, spb;
1759		✗	int src_offset = 0;
1760			AVFrame *fin;
1761
1762		✗	spf = s->win_size * (s->samples / ((s->win_size * sz) * ceil(s->samples / (float)(s->win_size * sz))));
1763		✗	spf = FFMAX(1, spf);
1764		✗	s->hop_size = spf;
1765
1766		✗	spb = (s->samples / (spf * sz)) * spf;
1767
1768		✗	fin = ff_get_audio_buffer(inlink, spf);
1769		✗	if (!fin)
1770		✗	return AVERROR(ENOMEM);
1771
1772		✗	while (x < sz) {
1773		✗	int acc_samples = 0;
1774		✗	int dst_offset = 0;
1775
1776		✗	while (nb_frame < s->nb_frames) {
1777		✗	AVFrame *cur_frame = s->frames[nb_frame];
1778		✗	int cur_frame_samples = cur_frame->nb_samples;
1779		✗	int nb_samples = 0;
1780
1781		✗	if (acc_samples < spf) {
1782		✗	nb_samples = FFMIN(spf - acc_samples, cur_frame_samples - src_offset);
1783		✗	acc_samples += nb_samples;
1784		✗	av_samples_copy(fin->extended_data, cur_frame->extended_data,
1785			dst_offset, src_offset, nb_samples,
1786			cur_frame->ch_layout.nb_channels, AV_SAMPLE_FMT_FLTP);
1787			}
1788
1789		✗	src_offset += nb_samples;
1790		✗	dst_offset += nb_samples;
1791		✗	if (cur_frame_samples <= src_offset) {
1792		✗	av_frame_free(&s->frames[nb_frame]);
1793		✗	nb_frame++;
1794		✗	src_offset = 0;
1795			}
1796
1797		✗	if (acc_samples == spf)
1798		✗	break;
1799			}
1800
1801		✗	ff_filter_execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
1802		✗	acalc_magnitudes(s);
1803
1804		✗	consumed += spf;
1805		✗	if (consumed >= spb) {
1806		✗	int h = s->orientation == VERTICAL ? s->h : s->w;
1807
1808		✗	scale_magnitudes(s, 1.f / (consumed / spf));
1809		✗	plot_spectrum_column(inlink, fin);
1810		✗	consumed = 0;
1811		✗	x++;
1812		✗	for (ch = 0; ch < s->nb_display_channels; ch++)
1813		✗	memset(s->magnitudes[ch], 0, h * sizeof(float));
1814			}
1815			}
1816
1817		✗	av_frame_free(&fin);
1818		✗	s->outpicref->pts = 0;
1819
1820		✗	if (s->legend)
1821		✗	draw_legend(ctx, s->samples);
1822
1823		✗	ret = ff_filter_frame(outlink, s->outpicref);
1824		✗	s->outpicref = NULL;
1825			}
1826
1827		✗	return ret;
1828			}
1829
1830		✗	static int showspectrumpic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
1831			{
1832		✗	AVFilterContext *ctx = inlink->dst;
1833		✗	ShowSpectrumContext *s = ctx->priv;
1834			void *ptr;
1835
1836		✗	if (s->nb_frames + 1ULL > s->frames_size / sizeof(*(s->frames))) {
1837		✗	ptr = av_fast_realloc(s->frames, &s->frames_size, s->frames_size * 2);
1838		✗	if (!ptr)
1839		✗	return AVERROR(ENOMEM);
1840		✗	s->frames = ptr;
1841			}
1842
1843		✗	s->frames[s->nb_frames] = insamples;
1844		✗	s->samples += insamples->nb_samples;
1845		✗	s->nb_frames++;
1846
1847		✗	return 0;
1848			}
1849
1850			static const AVFilterPad showspectrumpic_inputs[] = {
1851			{
1852			.name = "default",
1853			.type = AVMEDIA_TYPE_AUDIO,
1854			.filter_frame = showspectrumpic_filter_frame,
1855			},
1856			};
1857
1858			static const AVFilterPad showspectrumpic_outputs[] = {
1859			{
1860			.name = "default",
1861			.type = AVMEDIA_TYPE_VIDEO,
1862			.config_props = config_output,
1863			.request_frame = showspectrumpic_request_frame,
1864			},
1865			};
1866
1867			const FFFilter ff_avf_showspectrumpic = {
1868			.p.name = "showspectrumpic",
1869			.p.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output single picture."),
1870			.p.priv_class = &showspectrumpic_class,
1871			.p.flags = AVFILTER_FLAG_SLICE_THREADS,
1872			.uninit = uninit,
1873			.priv_size = sizeof(ShowSpectrumContext),
1874			FILTER_INPUTS(showspectrumpic_inputs),
1875			FILTER_OUTPUTS(showspectrumpic_outputs),
1876			FILTER_QUERY_FUNC2(query_formats),
1877			};
1878
1879			#endif // CONFIG_SHOWSPECTRUMPIC_FILTER
1880