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
34			#include "libavutil/mem.h"
35			#include "libavutil/tx.h"
36			#include "libavutil/avassert.h"
37			#include "libavutil/avstring.h"
38			#include "libavutil/channel_layout.h"
39			#include "libavutil/cpu.h"
40			#include "libavutil/opt.h"
41			#include "libavutil/parseutils.h"
42			#include "libavutil/xga_font_data.h"
43			#include "audio.h"
44			#include "formats.h"
45			#include "video.h"
46			#include "avfilter.h"
47			#include "filters.h"
48			#include "window_func.h"
49
50			enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
51			enum DataMode { D_MAGNITUDE, D_PHASE, D_UPHASE, NB_DMODES };
52			enum FrequencyScale { F_LINEAR, F_LOG, NB_FSCALES };
53			enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES };
54			enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, MAGMA, GREEN, VIRIDIS, PLASMA, CIVIDIS, TERRAIN, NB_CLMODES };
55			enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, LREPLACE, NB_SLIDES };
56			enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
57
58			#define DEFAULT_LENGTH 300
59
60			typedef struct ShowSpectrumContext {
61			const AVClass *class;
62			int w, h;
63			char *rate_str;
64			AVRational auto_frame_rate;
65			AVRational frame_rate;
66			AVFrame *outpicref;
67			AVFrame *in_frame;
68			int nb_display_channels;
69			int orientation;
70			int channel_width;
71			int channel_height;
72			int sliding; ///< 1 if sliding mode, 0 otherwise
73			int mode; ///< channel display mode
74			int color_mode; ///< display color scheme
75			int scale;
76			int fscale;
77			float saturation; ///< color saturation multiplier
78			float rotation; ///< color rotation
79			int start, stop; ///< zoom mode
80			int data;
81			int xpos; ///< x position (current column)
82			AVTXContext **fft; ///< Fast Fourier Transform context
83			AVTXContext **ifft; ///< Inverse Fast Fourier Transform context
84			av_tx_fn tx_fn;
85			av_tx_fn itx_fn;
86			int fft_size; ///< number of coeffs (FFT window size)
87			AVComplexFloat **fft_in; ///< input FFT coeffs
88			AVComplexFloat **fft_data; ///< bins holder for each (displayed) channels
89			AVComplexFloat **fft_scratch;///< scratch buffers
90			float *window_func_lut; ///< Window function LUT
91			float **magnitudes;
92			float **phases;
93			int win_func;
94			int win_size;
95			int buf_size;
96			double win_scale;
97			float overlap;
98			float gain;
99			int hop_size;
100			float *combine_buffer; ///< color combining buffer (4 * h items)
101			float **color_buffer; ///< color buffer (4 * h * ch items)
102			int64_t pts;
103			int64_t old_pts;
104			int64_t in_pts;
105			int old_len;
106			int single_pic;
107			int legend;
108			int start_x, start_y;
109			float drange, limit;
110			float dmin, dmax;
111			uint64_t samples;
112			int (*plot_channel)(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs);
113			int eof;
114
115			float opacity_factor;
116
117			AVFrame **frames;
118			unsigned int nb_frames;
119			unsigned int frames_size;
120			} ShowSpectrumContext;
121
122			#define OFFSET(x) offsetof(ShowSpectrumContext, x)
123			#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
124
125			static const AVOption showspectrum_options[] = {
126			{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
127			{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
128			{ "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_SLIDES-1, FLAGS, .unit = "slide" },
129			{ "replace", "replace old columns with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, .unit = "slide" },
130			{ "scroll", "scroll from right to left", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, .unit = "slide" },
131			{ "fullframe", "return full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, FLAGS, .unit = "slide" },
132			{ "rscroll", "scroll from left to right", 0, AV_OPT_TYPE_CONST, {.i64=RSCROLL}, 0, 0, FLAGS, .unit = "slide" },
133			{ "lreplace", "replace from right to left", 0, AV_OPT_TYPE_CONST, {.i64=LREPLACE}, 0, 0, FLAGS, .unit = "slide" },
134			{ "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, COMBINED, NB_MODES-1, FLAGS, .unit = "mode" },
135			{ "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, .unit = "mode" },
136			{ "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, .unit = "mode" },
137			{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=CHANNEL}, CHANNEL, NB_CLMODES-1, FLAGS, .unit = "color" },
138			{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, .unit = "color" },
139			{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, .unit = "color" },
140			{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, .unit = "color" },
141			{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, .unit = "color" },
142			{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, .unit = "color" },
143			{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, .unit = "color" },
144			{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, .unit = "color" },
145			{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, .unit = "color" },
146			{ "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, .unit = "color" },
147			{ "magma", "magma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MAGMA}, 0, 0, FLAGS, .unit = "color" },
148			{ "green", "green based coloring", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, FLAGS, .unit = "color" },
149			{ "viridis", "viridis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=VIRIDIS}, 0, 0, FLAGS, .unit = "color" },
150			{ "plasma", "plasma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=PLASMA}, 0, 0, FLAGS, .unit = "color" },
151			{ "cividis", "cividis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=CIVIDIS}, 0, 0, FLAGS, .unit = "color" },
152			{ "terrain", "terrain based coloring", 0, AV_OPT_TYPE_CONST, {.i64=TERRAIN}, 0, 0, FLAGS, .unit = "color" },
153			{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, .unit = "scale" },
154			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "scale" },
155			{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, .unit = "scale" },
156			{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, .unit = "scale" },
157			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "scale" },
158			{ "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, .unit = "scale" },
159			{ "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, .unit = "scale" },
160			{ "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=F_LINEAR}, 0, NB_FSCALES-1, FLAGS, .unit = "fscale" },
161			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=F_LINEAR}, 0, 0, FLAGS, .unit = "fscale" },
162			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=F_LOG}, 0, 0, FLAGS, .unit = "fscale" },
163			{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
164			WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_HANNING),
165			{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, .unit = "orientation" },
166			{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, .unit = "orientation" },
167			{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, .unit = "orientation" },
168			{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, 1, FLAGS },
169			{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
170			{ "data", "set data mode", OFFSET(data), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_DMODES-1, FLAGS, .unit = "data" },
171			{ "magnitude", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_MAGNITUDE}, 0, 0, FLAGS, .unit = "data" },
172			{ "phase", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_PHASE}, 0, 0, FLAGS, .unit = "data" },
173			{ "uphase", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_UPHASE}, 0, 0, FLAGS, .unit = "data" },
174			{ "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
175			{ "start", "start frequency", OFFSET(start), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
176			{ "stop", "stop frequency", OFFSET(stop), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
177			{ "fps", "set video rate", OFFSET(rate_str), AV_OPT_TYPE_STRING, {.str = "auto"}, 0, 0, FLAGS },
178			{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
179			{ "drange", "set dynamic range in dBFS", OFFSET(drange), AV_OPT_TYPE_FLOAT, {.dbl = 120}, 10, 200, FLAGS },
180			{ "limit", "set upper limit in dBFS", OFFSET(limit), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -100, 100, FLAGS },
181			{ "opacity", "set opacity strength", OFFSET(opacity_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 10, FLAGS },
182			{ NULL }
183			};
184
185			AVFILTER_DEFINE_CLASS(showspectrum);
186
187			static const struct ColorTable {
188			float a, y, u, v;
189			} color_table[][8] = {
190			[INTENSITY] = {
191			{ 0, 0, 0, 0 },
192			{ 0.13, .03587126228984074, .1573300977624594, -.02548747583751842 },
193			{ 0.30, .18572281794568020, .1772436246393981, .17475554840414750 },
194			{ 0.60, .28184980583656130, -.1593064119945782, .47132074554608920 },
195			{ 0.73, .65830621175547810, -.3716070802232764, .24352759331252930 },
196			{ 0.78, .76318535758242900, -.4307467689263783, .16866496622310430 },
197			{ 0.91, .95336363636363640, -.2045454545454546, .03313636363636363 },
198			{ 1, 1, 0, 0 }},
199			[RAINBOW] = {
200			{ 0, 0, 0, 0 },
201			{ 0.13, 44/256., (189-128)/256., (138-128)/256. },
202			{ 0.25, 29/256., (186-128)/256., (119-128)/256. },
203			{ 0.38, 119/256., (194-128)/256., (53-128)/256. },
204			{ 0.60, 111/256., (73-128)/256., (59-128)/256. },
205			{ 0.73, 205/256., (19-128)/256., (149-128)/256. },
206			{ 0.86, 135/256., (83-128)/256., (200-128)/256. },
207			{ 1, 73/256., (95-128)/256., (225-128)/256. }},
208			[MORELAND] = {
209			{ 0, 44/256., (181-128)/256., (112-128)/256. },
210			{ 0.13, 126/256., (177-128)/256., (106-128)/256. },
211			{ 0.25, 164/256., (163-128)/256., (109-128)/256. },
212			{ 0.38, 200/256., (140-128)/256., (120-128)/256. },
213			{ 0.60, 201/256., (117-128)/256., (141-128)/256. },
214			{ 0.73, 177/256., (103-128)/256., (165-128)/256. },
215			{ 0.86, 136/256., (100-128)/256., (183-128)/256. },
216			{ 1, 68/256., (117-128)/256., (203-128)/256. }},
217			[NEBULAE] = {
218			{ 0, 10/256., (134-128)/256., (132-128)/256. },
219			{ 0.23, 21/256., (137-128)/256., (130-128)/256. },
220			{ 0.45, 35/256., (134-128)/256., (134-128)/256. },
221			{ 0.57, 51/256., (130-128)/256., (139-128)/256. },
222			{ 0.67, 104/256., (116-128)/256., (162-128)/256. },
223			{ 0.77, 120/256., (105-128)/256., (188-128)/256. },
224			{ 0.87, 140/256., (105-128)/256., (188-128)/256. },
225			{ 1, 1, 0, 0 }},
226			[FIRE] = {
227			{ 0, 0, 0, 0 },
228			{ 0.23, 44/256., (132-128)/256., (127-128)/256. },
229			{ 0.45, 62/256., (116-128)/256., (140-128)/256. },
230			{ 0.57, 75/256., (105-128)/256., (152-128)/256. },
231			{ 0.67, 95/256., (91-128)/256., (166-128)/256. },
232			{ 0.77, 126/256., (74-128)/256., (172-128)/256. },
233			{ 0.87, 164/256., (73-128)/256., (162-128)/256. },
234			{ 1, 1, 0, 0 }},
235			[FIERY] = {
236			{ 0, 0, 0, 0 },
237			{ 0.23, 36/256., (116-128)/256., (163-128)/256. },
238			{ 0.45, 52/256., (102-128)/256., (200-128)/256. },
239			{ 0.57, 116/256., (84-128)/256., (196-128)/256. },
240			{ 0.67, 157/256., (67-128)/256., (181-128)/256. },
241			{ 0.77, 193/256., (40-128)/256., (155-128)/256. },
242			{ 0.87, 221/256., (101-128)/256., (134-128)/256. },
243			{ 1, 1, 0, 0 }},
244			[FRUIT] = {
245			{ 0, 0, 0, 0 },
246			{ 0.20, 29/256., (136-128)/256., (119-128)/256. },
247			{ 0.30, 60/256., (119-128)/256., (90-128)/256. },
248			{ 0.40, 85/256., (91-128)/256., (85-128)/256. },
249			{ 0.50, 116/256., (70-128)/256., (105-128)/256. },
250			{ 0.60, 151/256., (50-128)/256., (146-128)/256. },
251			{ 0.70, 191/256., (63-128)/256., (178-128)/256. },
252			{ 1, 98/256., (80-128)/256., (221-128)/256. }},
253			[COOL] = {
254			{ 0, 0, 0, 0 },
255			{ .15, 0, .5, -.5 },
256			{ 1, 1, -.5, .5 }},
257			[MAGMA] = {
258			{ 0, 0, 0, 0 },
259			{ 0.10, 23/256., (175-128)/256., (120-128)/256. },
260			{ 0.23, 43/256., (158-128)/256., (144-128)/256. },
261			{ 0.35, 85/256., (138-128)/256., (179-128)/256. },
262			{ 0.48, 96/256., (128-128)/256., (189-128)/256. },
263			{ 0.64, 128/256., (103-128)/256., (214-128)/256. },
264			{ 0.92, 205/256., (80-128)/256., (152-128)/256. },
265			{ 1, 1, 0, 0 }},
266			[GREEN] = {
267			{ 0, 0, 0, 0 },
268			{ .75, .5, 0, -.5 },
269			{ 1, 1, 0, 0 }},
270			[VIRIDIS] = {
271			{ 0, 0, 0, 0 },
272			{ 0.10, 0x39/255., (0x9D -128)/255., (0x8F -128)/255. },
273			{ 0.23, 0x5C/255., (0x9A -128)/255., (0x68 -128)/255. },
274			{ 0.35, 0x69/255., (0x93 -128)/255., (0x57 -128)/255. },
275			{ 0.48, 0x76/255., (0x88 -128)/255., (0x4B -128)/255. },
276			{ 0.64, 0x8A/255., (0x72 -128)/255., (0x4F -128)/255. },
277			{ 0.80, 0xA3/255., (0x50 -128)/255., (0x66 -128)/255. },
278			{ 1, 0xCC/255., (0x2F -128)/255., (0x87 -128)/255. }},
279			[PLASMA] = {
280			{ 0, 0, 0, 0 },
281			{ 0.10, 0x27/255., (0xC2 -128)/255., (0x82 -128)/255. },
282			{ 0.58, 0x5B/255., (0x9A -128)/255., (0xAE -128)/255. },
283			{ 0.70, 0x89/255., (0x44 -128)/255., (0xAB -128)/255. },
284			{ 0.80, 0xB4/255., (0x2B -128)/255., (0x9E -128)/255. },
285			{ 0.91, 0xD2/255., (0x38 -128)/255., (0x92 -128)/255. },
286			{ 1, 1, 0, 0. }},
287			[CIVIDIS] = {
288			{ 0, 0, 0, 0 },
289			{ 0.20, 0x28/255., (0x98 -128)/255., (0x6F -128)/255. },
290			{ 0.50, 0x48/255., (0x95 -128)/255., (0x74 -128)/255. },
291			{ 0.63, 0x69/255., (0x84 -128)/255., (0x7F -128)/255. },
292			{ 0.76, 0x89/255., (0x75 -128)/255., (0x84 -128)/255. },
293			{ 0.90, 0xCE/255., (0x35 -128)/255., (0x95 -128)/255. },
294			{ 1, 1, 0, 0. }},
295			[TERRAIN] = {
296			{ 0, 0, 0, 0 },
297			{ 0.15, 0, .5, 0 },
298			{ 0.60, 1, -.5, -.5 },
299			{ 0.85, 1, -.5, .5 },
300			{ 1, 1, 0, 0 }},
301			};
302
303		✗	static av_cold void uninit(AVFilterContext *ctx)
304			{
305		✗	ShowSpectrumContext *s = ctx->priv;
306			int i;
307
308		✗	av_freep(&s->combine_buffer);
309		✗	if (s->fft) {
310		✗	for (i = 0; i < s->nb_display_channels; i++)
311		✗	av_tx_uninit(&s->fft[i]);
312			}
313		✗	av_freep(&s->fft);
314		✗	if (s->ifft) {
315		✗	for (i = 0; i < s->nb_display_channels; i++)
316		✗	av_tx_uninit(&s->ifft[i]);
317			}
318		✗	av_freep(&s->ifft);
319		✗	if (s->fft_data) {
320		✗	for (i = 0; i < s->nb_display_channels; i++)
321		✗	av_freep(&s->fft_data[i]);
322			}
323		✗	av_freep(&s->fft_data);
324		✗	if (s->fft_in) {
325		✗	for (i = 0; i < s->nb_display_channels; i++)
326		✗	av_freep(&s->fft_in[i]);
327			}
328		✗	av_freep(&s->fft_in);
329		✗	if (s->fft_scratch) {
330		✗	for (i = 0; i < s->nb_display_channels; i++)
331		✗	av_freep(&s->fft_scratch[i]);
332			}
333		✗	av_freep(&s->fft_scratch);
334		✗	if (s->color_buffer) {
335		✗	for (i = 0; i < s->nb_display_channels; i++)
336		✗	av_freep(&s->color_buffer[i]);
337			}
338		✗	av_freep(&s->color_buffer);
339		✗	av_freep(&s->window_func_lut);
340		✗	if (s->magnitudes) {
341		✗	for (i = 0; i < s->nb_display_channels; i++)
342		✗	av_freep(&s->magnitudes[i]);
343			}
344		✗	av_freep(&s->magnitudes);
345		✗	av_frame_free(&s->outpicref);
346		✗	av_frame_free(&s->in_frame);
347		✗	if (s->phases) {
348		✗	for (i = 0; i < s->nb_display_channels; i++)
349		✗	av_freep(&s->phases[i]);
350			}
351		✗	av_freep(&s->phases);
352
353		✗	while (s->nb_frames > 0) {
354		✗	av_frame_free(&s->frames[s->nb_frames - 1]);
355		✗	s->nb_frames--;
356			}
357
358		✗	av_freep(&s->frames);
359		✗	}
360
361		✗	static int query_formats(const AVFilterContext *ctx,
362			AVFilterFormatsConfig **cfg_in,
363			AVFilterFormatsConfig **cfg_out)
364			{
365		✗	AVFilterFormats *formats = NULL;
366			static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
367			static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE };
368			int ret;
369
370			/* set input audio formats */
371		✗	formats = ff_make_format_list(sample_fmts);
372		✗	if ((ret = ff_formats_ref(formats, &cfg_in[0]->formats)) < 0)
373		✗	return ret;
374
375			/* set output video format */
376		✗	formats = ff_make_format_list(pix_fmts);
377		✗	if ((ret = ff_formats_ref(formats, &cfg_out[0]->formats)) < 0)
378		✗	return ret;
379
380		✗	return 0;
381			}
382
383		✗	static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
384			{
385		✗	ShowSpectrumContext *s = ctx->priv;
386		✗	AVFilterLink *inlink = ctx->inputs[0];
387		✗	const float *window_func_lut = s->window_func_lut;
388		✗	AVFrame *fin = arg;
389		✗	const int ch = jobnr;
390			int n;
391
392			/* fill FFT input with the number of samples available */
393		✗	const float *p = (float *)fin->extended_data[ch];
394		✗	float *in_frame = (float *)s->in_frame->extended_data[ch];
395
396		✗	memmove(in_frame, in_frame + s->hop_size, (s->fft_size - s->hop_size) * sizeof(float));
397		✗	memcpy(in_frame + s->fft_size - s->hop_size, p, fin->nb_samples * sizeof(float));
398
399		✗	for (int i = fin->nb_samples; i < s->hop_size; i++)
400		✗	in_frame[i + s->fft_size - s->hop_size] = 0.f;
401
402		✗	if (s->stop) {
403			float theta, phi, psi, a, b, S, c;
404		✗	AVComplexFloat *f = s->fft_in[ch];
405		✗	AVComplexFloat *g = s->fft_data[ch];
406		✗	AVComplexFloat *h = s->fft_scratch[ch];
407		✗	int L = s->buf_size;
408		✗	int N = s->win_size;
409		✗	int M = s->win_size / 2;
410
411		✗	for (n = 0; n < s->win_size; n++) {
412		✗	s->fft_data[ch][n].re = in_frame[n] * window_func_lut[n];
413		✗	s->fft_data[ch][n].im = 0;
414			}
415
416		✗	phi = 2.f * M_PI * (s->stop - s->start) / (float)inlink->sample_rate / (M - 1);
417		✗	theta = 2.f * M_PI * s->start / (float)inlink->sample_rate;
418
419		✗	for (int n = 0; n < M; n++) {
420		✗	h[n].re = cosf(n * n / 2.f * phi);
421		✗	h[n].im = sinf(n * n / 2.f * phi);
422			}
423
424		✗	for (int n = M; n < L; n++) {
425		✗	h[n].re = 0.f;
426		✗	h[n].im = 0.f;
427			}
428
429		✗	for (int n = L - N; n < L; n++) {
430		✗	h[n].re = cosf((L - n) * (L - n) / 2.f * phi);
431		✗	h[n].im = sinf((L - n) * (L - n) / 2.f * phi);
432			}
433
434		✗	for (int n = N; n < L; n++) {
435		✗	g[n].re = 0.f;
436		✗	g[n].im = 0.f;
437			}
438
439		✗	for (int n = 0; n < N; n++) {
440		✗	psi = n * theta + n * n / 2.f * phi;
441		✗	c = cosf(psi);
442		✗	S = -sinf(psi);
443		✗	a = c * g[n].re - S * g[n].im;
444		✗	b = S * g[n].re + c * g[n].im;
445		✗	g[n].re = a;
446		✗	g[n].im = b;
447			}
448
449		✗	memcpy(f, h, s->buf_size * sizeof(*f));
450		✗	s->tx_fn(s->fft[ch], h, f, sizeof(AVComplexFloat));
451
452		✗	memcpy(f, g, s->buf_size * sizeof(*f));
453		✗	s->tx_fn(s->fft[ch], g, f, sizeof(AVComplexFloat));
454
455		✗	for (int n = 0; n < L; n++) {
456		✗	c = g[n].re;
457		✗	S = g[n].im;
458		✗	a = c * h[n].re - S * h[n].im;
459		✗	b = S * h[n].re + c * h[n].im;
460
461		✗	g[n].re = a / L;
462		✗	g[n].im = b / L;
463			}
464
465		✗	memcpy(f, g, s->buf_size * sizeof(*f));
466		✗	s->itx_fn(s->ifft[ch], g, f, sizeof(AVComplexFloat));
467
468		✗	for (int k = 0; k < M; k++) {
469		✗	psi = k * k / 2.f * phi;
470		✗	c = cosf(psi);
471		✗	S = -sinf(psi);
472		✗	a = c * g[k].re - S * g[k].im;
473		✗	b = S * g[k].re + c * g[k].im;
474		✗	s->fft_data[ch][k].re = a;
475		✗	s->fft_data[ch][k].im = b;
476			}
477			} else {
478		✗	for (n = 0; n < s->win_size; n++) {
479		✗	s->fft_in[ch][n].re = in_frame[n] * window_func_lut[n];
480		✗	s->fft_in[ch][n].im = 0;
481			}
482
483			/* run FFT on each samples set */
484		✗	s->tx_fn(s->fft[ch], s->fft_data[ch], s->fft_in[ch], sizeof(AVComplexFloat));
485			}
486
487		✗	return 0;
488			}
489
490		✗	static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
491			{
492			const uint8_t *font;
493			int font_height;
494
495		✗	font = avpriv_cga_font, font_height = 8;
496
497		✗	for (int i = 0; txt[i]; i++) {
498			int char_y, mask;
499
500		✗	if (o) {
501		✗	for (char_y = font_height - 1; char_y >= 0; char_y--) {
502		✗	uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
503		✗	for (mask = 0x80; mask; mask >>= 1) {
504		✗	if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
505		✗	p[char_y] = ~p[char_y];
506		✗	p += pic->linesize[0];
507			}
508			}
509			} else {
510		✗	uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
511		✗	for (char_y = 0; char_y < font_height; char_y++) {
512		✗	for (mask = 0x80; mask; mask >>= 1) {
513		✗	if (font[txt[i] * font_height + char_y] & mask)
514		✗	*p = ~(*p);
515		✗	p++;
516			}
517		✗	p += pic->linesize[0] - 8;
518			}
519			}
520			}
521
522		✗	for (int i = 0; txt[i] && pic->data[3]; i++) {
523			int char_y, mask;
524
525		✗	if (o) {
526		✗	for (char_y = font_height - 1; char_y >= 0; char_y--) {
527		✗	uint8_t *p = pic->data[3] + (y + i * 10) * pic->linesize[3] + x;
528		✗	for (mask = 0x80; mask; mask >>= 1) {
529		✗	for (int k = 0; k < 8; k++)
530		✗	p[k] = 255;
531		✗	p += pic->linesize[3];
532			}
533			}
534			} else {
535		✗	uint8_t *p = pic->data[3] + y*pic->linesize[3] + (x + i*8);
536		✗	for (char_y = 0; char_y < font_height; char_y++) {
537		✗	for (mask = 0x80; mask; mask >>= 1)
538		✗	*p++ = 255;
539		✗	p += pic->linesize[3] - 8;
540			}
541			}
542			}
543		✗	}
544
545		✗	static void color_range(ShowSpectrumContext *s, int ch,
546			float *yf, float *uf, float *vf)
547			{
548		✗	switch (s->mode) {
549		✗	case COMBINED:
550			// reduce range by channel count
551		✗	*yf = 256.0f / s->nb_display_channels;
552		✗	switch (s->color_mode) {
553		✗	case RAINBOW:
554			case MORELAND:
555			case NEBULAE:
556			case FIRE:
557			case FIERY:
558			case FRUIT:
559			case COOL:
560			case GREEN:
561			case VIRIDIS:
562			case PLASMA:
563			case CIVIDIS:
564			case TERRAIN:
565			case MAGMA:
566			case INTENSITY:
567		✗	*uf = *yf;
568		✗	*vf = *yf;
569		✗	break;
570		✗	case CHANNEL:
571			/* adjust saturation for mixed UV coloring */
572			/* this factor is correct for infinite channels, an approximation otherwise */
573		✗	*uf = *yf * M_PI;
574		✗	*vf = *yf * M_PI;
575		✗	break;
576		✗	default:
577		✗	av_assert0(0);
578			}
579		✗	break;
580		✗	case SEPARATE:
581			// full range
582		✗	*yf = 256.0f;
583		✗	*uf = 256.0f;
584		✗	*vf = 256.0f;
585		✗	break;
586		✗	default:
587		✗	av_assert0(0);
588			}
589
590		✗	if (s->color_mode == CHANNEL) {
591		✗	if (s->nb_display_channels > 1) {
592		✗	*uf *= 0.5f * sinf((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
593		✗	*vf *= 0.5f * cosf((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
594			} else {
595		✗	*uf *= 0.5f * sinf(M_PI * s->rotation);
596		✗	*vf *= 0.5f * cosf(M_PI * s->rotation + M_PI_2);
597			}
598			} else {
599		✗	*uf += *uf * sinf(M_PI * s->rotation);
600		✗	*vf += *vf * cosf(M_PI * s->rotation + M_PI_2);
601			}
602
603		✗	*uf *= s->saturation;
604		✗	*vf *= s->saturation;
605		✗	}
606
607		✗	static void pick_color(ShowSpectrumContext *s,
608			float yf, float uf, float vf,
609			float a, float *out)
610			{
611		✗	const float af = s->opacity_factor * 255.f;
612
613		✗	if (s->color_mode > CHANNEL) {
614		✗	const int cm = s->color_mode;
615			float y, u, v;
616			int i;
617
618		✗	for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++)
619		✗	if (color_table[cm][i].a >= a)
620		✗	break;
621			// i now is the first item >= the color
622			// now we know to interpolate between item i - 1 and i
623		✗	if (a <= color_table[cm][i - 1].a) {
624		✗	y = color_table[cm][i - 1].y;
625		✗	u = color_table[cm][i - 1].u;
626		✗	v = color_table[cm][i - 1].v;
627		✗	} else if (a >= color_table[cm][i].a) {
628		✗	y = color_table[cm][i].y;
629		✗	u = color_table[cm][i].u;
630		✗	v = color_table[cm][i].v;
631			} else {
632		✗	float start = color_table[cm][i - 1].a;
633		✗	float end = color_table[cm][i].a;
634		✗	float lerpfrac = (a - start) / (end - start);
635		✗	y = color_table[cm][i - 1].y * (1.0f - lerpfrac)
636		✗	+ color_table[cm][i].y * lerpfrac;
637		✗	u = color_table[cm][i - 1].u * (1.0f - lerpfrac)
638		✗	+ color_table[cm][i].u * lerpfrac;
639		✗	v = color_table[cm][i - 1].v * (1.0f - lerpfrac)
640		✗	+ color_table[cm][i].v * lerpfrac;
641			}
642
643		✗	out[0] = y * yf;
644		✗	out[1] = u * uf;
645		✗	out[2] = v * vf;
646		✗	out[3] = a * af;
647			} else {
648		✗	out[0] = a * yf;
649		✗	out[1] = a * uf;
650		✗	out[2] = a * vf;
651		✗	out[3] = a * af;
652			}
653		✗	}
654
655		✗	static char *get_time(AVFilterContext *ctx, float seconds, int x)
656			{
657			char *units;
658
659		✗	if (x == 0)
660		✗	units = av_asprintf("0");
661		✗	else if (log10(seconds) > 6)
662		✗	units = av_asprintf("%.2fh", seconds / (60 * 60));
663		✗	else if (log10(seconds) > 3)
664		✗	units = av_asprintf("%.2fm", seconds / 60);
665			else
666		✗	units = av_asprintf("%.2fs", seconds);
667		✗	return units;
668			}
669
670		✗	static float log_scale(const float bin,
671			const float bmin, const float bmax,
672			const float min, const float max)
673			{
674		✗	return exp2f(((bin - bmin) / (bmax - bmin)) * (log2f(max) - log2f(min)) + log2f(min));
675			}
676
677		✗	static float get_hz(const float bin, const float bmax,
678			const float min, const float max,
679			int fscale)
680			{
681		✗	switch (fscale) {
682		✗	case F_LINEAR:
683		✗	return min + (bin / bmax) * (max - min);
684		✗	case F_LOG:
685		✗	return min + log_scale(bin, 0, bmax, 20.f, max - min);
686		✗	default:
687		✗	return 0.f;
688			}
689			}
690
691		✗	static float inv_log_scale(float bin,
692			float bmin, float bmax,
693			float min, float max)
694			{
695		✗	return (min * exp2f((bin * (log2f(max) - log2f(20.f))) / bmax) + min) * bmax / max;
696			}
697
698		✗	static float bin_pos(const int bin, const int num_bins, const float min, const float max)
699			{
700		✗	return inv_log_scale(bin, 0.f, num_bins, 20.f, max - min);
701			}
702
703		✗	static float get_scale(AVFilterContext *ctx, int scale, float a)
704			{
705		✗	ShowSpectrumContext *s = ctx->priv;
706		✗	const float dmin = s->dmin;
707		✗	const float dmax = s->dmax;
708
709		✗	a = av_clipf(a, dmin, dmax);
710		✗	if (scale != LOG)
711		✗	a = (a - dmin) / (dmax - dmin);
712
713		✗	switch (scale) {
714		✗	case LINEAR:
715		✗	break;
716		✗	case SQRT:
717		✗	a = sqrtf(a);
718		✗	break;
719		✗	case CBRT:
720		✗	a = cbrtf(a);
721		✗	break;
722		✗	case FOURTHRT:
723		✗	a = sqrtf(sqrtf(a));
724		✗	break;
725		✗	case FIFTHRT:
726		✗	a = powf(a, 0.2f);
727		✗	break;
728		✗	case LOG:
729		✗	a = (s->drange - s->limit + log10f(a) * 20.f) / s->drange;
730		✗	break;
731		✗	default:
732		✗	av_assert0(0);
733			}
734
735		✗	return a;
736			}
737
738		✗	static float get_iscale(AVFilterContext *ctx, int scale, float a)
739			{
740		✗	ShowSpectrumContext *s = ctx->priv;
741		✗	const float dmin = s->dmin;
742		✗	const float dmax = s->dmax;
743
744		✗	switch (scale) {
745		✗	case LINEAR:
746		✗	break;
747		✗	case SQRT:
748		✗	a = a * a;
749		✗	break;
750		✗	case CBRT:
751		✗	a = a * a * a;
752		✗	break;
753		✗	case FOURTHRT:
754		✗	a = a * a * a * a;
755		✗	break;
756		✗	case FIFTHRT:
757		✗	a = a * a * a * a * a;
758		✗	break;
759		✗	case LOG:
760		✗	a = expf(M_LN10 * (a * s->drange - s->drange + s->limit) / 20.f);
761		✗	break;
762		✗	default:
763		✗	av_assert0(0);
764			}
765
766		✗	if (scale != LOG)
767		✗	a = a * (dmax - dmin) + dmin;
768
769		✗	return a;
770			}
771
772		✗	static int draw_legend(AVFilterContext *ctx, uint64_t samples)
773			{
774		✗	ShowSpectrumContext *s = ctx->priv;
775		✗	AVFilterLink *inlink = ctx->inputs[0];
776		✗	AVFilterLink *outlink = ctx->outputs[0];
777		✗	int ch, y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
778		✗	int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
779		✗	float spp = samples / (float)sz;
780			char *text;
781			uint8_t *dst;
782			char chlayout_str[128];
783
784		✗	av_channel_layout_describe(&inlink->ch_layout, chlayout_str, sizeof(chlayout_str));
785
786		✗	text = av_asprintf("%d Hz | %s", inlink->sample_rate, chlayout_str);
787		✗	if (!text)
788		✗	return AVERROR(ENOMEM);
789
790		✗	drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
791		✗	drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, outlink->h - 10, text, 0);
792		✗	av_freep(&text);
793		✗	if (s->stop) {
794		✗	text = av_asprintf("Zoom: %d Hz - %d Hz", s->start, s->stop);
795		✗	if (!text)
796		✗	return AVERROR(ENOMEM);
797		✗	drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, 3, text, 0);
798		✗	av_freep(&text);
799			}
800
801		✗	dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
802		✗	for (x = 0; x < s->w + 1; x++)
803		✗	dst[x] = 200;
804		✗	dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
805		✗	for (x = 0; x < s->w + 1; x++)
806		✗	dst[x] = 200;
807		✗	for (y = 0; y < s->h + 2; y++) {
808		✗	dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
809		✗	dst[s->start_x - 1] = 200;
810		✗	dst[s->start_x + s->w] = 200;
811			}
812		✗	if (s->orientation == VERTICAL) {
813		✗	int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
814		✗	int hh = s->mode == SEPARATE ? -(s->h % s->nb_display_channels) + 1 : 1;
815		✗	for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
816		✗	for (y = 0; y < h; y += 20) {
817		✗	dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
818		✗	dst[s->start_x - 2] = 200;
819		✗	dst[s->start_x + s->w + 1] = 200;
820			}
821		✗	for (y = 0; y < h; y += 40) {
822		✗	dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
823		✗	dst[s->start_x - 3] = 200;
824		✗	dst[s->start_x + s->w + 2] = 200;
825			}
826		✗	dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
827		✗	for (x = 0; x < s->w; x+=40)
828		✗	dst[x] = 200;
829		✗	dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
830		✗	for (x = 0; x < s->w; x+=80)
831		✗	dst[x] = 200;
832		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
833		✗	for (x = 0; x < s->w; x+=40) {
834		✗	dst[x] = 200;
835			}
836		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
837		✗	for (x = 0; x < s->w; x+=80) {
838		✗	dst[x] = 200;
839			}
840		✗	for (y = 0; y < h; y += 40) {
841		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
842		✗	float hertz = get_hz(y, h, s->start, s->start + range, s->fscale);
843			char *units;
844
845		✗	if (hertz == 0)
846		✗	units = av_asprintf("DC");
847			else
848		✗	units = av_asprintf("%.2f", hertz);
849		✗	if (!units)
850		✗	return AVERROR(ENOMEM);
851
852		✗	drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4 - hh, units, 0);
853		✗	av_free(units);
854			}
855			}
856
857		✗	for (x = 0; x < s->w && s->single_pic; x+=80) {
858		✗	float seconds = x * spp / inlink->sample_rate;
859		✗	char *units = get_time(ctx, seconds, x);
860		✗	if (!units)
861		✗	return AVERROR(ENOMEM);
862
863		✗	drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->h + s->start_y + 6, units, 0);
864		✗	drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->start_y - 12, units, 0);
865		✗	av_free(units);
866			}
867
868		✗	drawtext(s->outpicref, outlink->w / 2 - 4 * 4, outlink->h - s->start_y / 2, "TIME", 0);
869		✗	drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 14 * 4, "FREQUENCY (Hz)", 1);
870			} else {
871		✗	int w = s->mode == SEPARATE ? s->w / s->nb_display_channels : s->w;
872		✗	for (y = 0; y < s->h; y += 20) {
873		✗	dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
874		✗	dst[s->start_x - 2] = 200;
875		✗	dst[s->start_x + s->w + 1] = 200;
876			}
877		✗	for (y = 0; y < s->h; y += 40) {
878		✗	dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
879		✗	dst[s->start_x - 3] = 200;
880		✗	dst[s->start_x + s->w + 2] = 200;
881			}
882		✗	for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
883		✗	dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
884		✗	for (x = 0; x < w; x+=40)
885		✗	dst[x] = 200;
886		✗	dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x + w * ch;
887		✗	for (x = 0; x < w; x+=80)
888		✗	dst[x] = 200;
889		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x + w * ch;
890		✗	for (x = 0; x < w; x+=40) {
891		✗	dst[x] = 200;
892			}
893		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
894		✗	for (x = 0; x < w; x+=80) {
895		✗	dst[x] = 200;
896			}
897		✗	for (x = 0; x < w - 79; x += 80) {
898		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
899		✗	float hertz = get_hz(x, w, s->start, s->start + range, s->fscale);
900			char *units;
901
902		✗	if (hertz == 0)
903		✗	units = av_asprintf("DC");
904			else
905		✗	units = av_asprintf("%.2f", hertz);
906		✗	if (!units)
907		✗	return AVERROR(ENOMEM);
908
909		✗	drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->start_y - 12, units, 0);
910		✗	drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->h + s->start_y + 6, units, 0);
911		✗	av_free(units);
912			}
913			}
914		✗	for (y = 0; y < s->h && s->single_pic; y+=40) {
915		✗	float seconds = y * spp / inlink->sample_rate;
916		✗	char *units = get_time(ctx, seconds, x);
917		✗	if (!units)
918		✗	return AVERROR(ENOMEM);
919
920		✗	drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, s->start_y + y - 4, units, 0);
921		✗	av_free(units);
922			}
923		✗	drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 4 * 4, "TIME", 1);
924		✗	drawtext(s->outpicref, outlink->w / 2 - 14 * 4, outlink->h - s->start_y / 2, "FREQUENCY (Hz)", 0);
925			}
926
927		✗	for (ch = 0; ch < (multi ? s->nb_display_channels : 1); ch++) {
928		✗	int h = multi ? s->h / s->nb_display_channels : s->h;
929
930		✗	for (y = 0; y < h; y++) {
931		✗	float out[4] = { 0., 127.5, 127.5, 0.f};
932			int chn;
933
934		✗	for (chn = 0; chn < (s->mode == SEPARATE ? 1 : s->nb_display_channels); chn++) {
935			float yf, uf, vf;
936		✗	int channel = (multi) ? s->nb_display_channels - ch - 1 : chn;
937			float lout[4];
938
939		✗	color_range(s, channel, &yf, &uf, &vf);
940		✗	pick_color(s, yf, uf, vf, y / (float)h, lout);
941		✗	out[0] += lout[0];
942		✗	out[1] += lout[1];
943		✗	out[2] += lout[2];
944		✗	out[3] += lout[3];
945			}
946		✗	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);
947		✗	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);
948		✗	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);
949		✗	if (s->outpicref->data[3])
950		✗	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);
951			}
952
953		✗	for (y = 0; ch == 0 && y < h + 5; y += 25) {
954			static const char *log_fmt = "%.0f";
955			static const char *lin_fmt = "%.3f";
956		✗	const float a = av_clipf(1.f - y / (float)(h - 1), 0.f, 1.f);
957		✗	const float value = s->scale == LOG ? log10f(get_iscale(ctx, s->scale, a)) * 20.f : get_iscale(ctx, s->scale, a);
958			char *text;
959
960		✗	text = av_asprintf(s->scale == LOG ? log_fmt : lin_fmt, value);
961		✗	if (!text)
962		✗	continue;
963		✗	drawtext(s->outpicref, s->w + s->start_x + 35, s->start_y + y - 3, text, 0);
964		✗	av_free(text);
965			}
966			}
967
968		✗	if (s->scale == LOG)
969		✗	drawtext(s->outpicref, s->w + s->start_x + 22, s->start_y + s->h + 20, "dBFS", 0);
970
971		✗	return 0;
972			}
973
974		✗	static float get_value(AVFilterContext *ctx, int ch, int y)
975			{
976		✗	ShowSpectrumContext *s = ctx->priv;
977		✗	float *magnitudes = s->magnitudes[ch];
978		✗	float *phases = s->phases[ch];
979			float a;
980
981		✗	switch (s->data) {
982		✗	case D_MAGNITUDE:
983			/* get magnitude */
984		✗	a = magnitudes[y];
985		✗	break;
986		✗	case D_UPHASE:
987			case D_PHASE:
988			/* get phase */
989		✗	a = phases[y];
990		✗	break;
991		✗	default:
992		✗	av_assert0(0);
993			}
994
995		✗	return av_clipf(get_scale(ctx, s->scale, a), 0.f, 1.f);
996			}
997
998		✗	static int plot_channel_lin(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
999			{
1000		✗	ShowSpectrumContext *s = ctx->priv;
1001		✗	const int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
1002		✗	const int ch = jobnr;
1003			float yf, uf, vf;
1004			int y;
1005
1006			/* decide color range */
1007		✗	color_range(s, ch, &yf, &uf, &vf);
1008
1009			/* draw the channel */
1010		✗	for (y = 0; y < h; y++) {
1011		✗	int row = (s->mode == COMBINED) ? y : ch * h + y;
1012		✗	float *out = &s->color_buffer[ch][4 * row];
1013		✗	float a = get_value(ctx, ch, y);
1014
1015		✗	pick_color(s, yf, uf, vf, a, out);
1016			}
1017
1018		✗	return 0;
1019			}
1020
1021		✗	static int plot_channel_log(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1022			{
1023		✗	ShowSpectrumContext *s = ctx->priv;
1024		✗	AVFilterLink *inlink = ctx->inputs[0];
1025		✗	const int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
1026		✗	const int ch = jobnr;
1027			float yf, uf, vf;
1028
1029			/* decide color range */
1030		✗	color_range(s, ch, &yf, &uf, &vf);
1031
1032			/* draw the channel */
1033		✗	for (int yy = 0; yy < h; yy++) {
1034		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
1035		✗	float pos = bin_pos(yy, h, s->start, s->start + range);
1036		✗	float delta = pos - floorf(pos);
1037			float a0, a1;
1038
1039		✗	a0 = get_value(ctx, ch, av_clip(pos, 0, h-1));
1040		✗	a1 = get_value(ctx, ch, av_clip(pos+1, 0, h-1));
1041			{
1042		✗	int row = (s->mode == COMBINED) ? yy : ch * h + yy;
1043		✗	float *out = &s->color_buffer[ch][4 * row];
1044
1045		✗	pick_color(s, yf, uf, vf, delta * a1 + (1.f - delta) * a0, out);
1046			}
1047			}
1048
1049		✗	return 0;
1050			}
1051
1052		✗	static int config_output(AVFilterLink *outlink)
1053			{
1054		✗	FilterLink *l = ff_filter_link(outlink);
1055		✗	AVFilterContext *ctx = outlink->src;
1056		✗	AVFilterLink *inlink = ctx->inputs[0];
1057		✗	ShowSpectrumContext *s = ctx->priv;
1058			int i, fft_size, h, w, ret;
1059			float overlap;
1060
1061		✗	s->old_pts = AV_NOPTS_VALUE;
1062		✗	s->dmax = expf(s->limit * M_LN10 / 20.f);
1063		✗	s->dmin = expf((s->limit - s->drange) * M_LN10 / 20.f);
1064
1065		✗	switch (s->fscale) {
1066		✗	case F_LINEAR: s->plot_channel = plot_channel_lin; break;
1067		✗	case F_LOG: s->plot_channel = plot_channel_log; break;
1068		✗	default: return AVERROR_BUG;
1069			}
1070
1071		✗	s->stop = FFMIN(s->stop, inlink->sample_rate / 2);
1072		✗	if ((s->stop || s->start) && s->stop <= s->start) {
1073		✗	av_log(ctx, AV_LOG_ERROR, "Stop frequency should be greater than start.\n");
1074		✗	return AVERROR(EINVAL);
1075			}
1076
1077		✗	if (!strcmp(ctx->filter->name, "showspectrumpic"))
1078		✗	s->single_pic = 1;
1079
1080		✗	outlink->w = s->w;
1081		✗	outlink->h = s->h;
1082		✗	outlink->sample_aspect_ratio = (AVRational){1,1};
1083
1084		✗	if (s->legend) {
1085		✗	s->start_x = (log10(inlink->sample_rate) + 1) * 25;
1086		✗	s->start_y = 64;
1087		✗	outlink->w += s->start_x * 2;
1088		✗	outlink->h += s->start_y * 2;
1089			}
1090
1091		✗	h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->ch_layout.nb_channels;
1092		✗	w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->ch_layout.nb_channels;
1093		✗	s->channel_height = h;
1094		✗	s->channel_width = w;
1095
1096		✗	if (s->orientation == VERTICAL) {
1097			/* FFT window size (precision) according to the requested output frame height */
1098		✗	fft_size = h * 2;
1099			} else {
1100			/* FFT window size (precision) according to the requested output frame width */
1101		✗	fft_size = w * 2;
1102			}
1103
1104		✗	s->win_size = fft_size;
1105		✗	s->buf_size = FFALIGN(s->win_size << (!!s->stop), av_cpu_max_align());
1106
1107		✗	if (!s->fft) {
1108		✗	s->fft = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->fft));
1109		✗	if (!s->fft)
1110		✗	return AVERROR(ENOMEM);
1111			}
1112
1113		✗	if (s->stop) {
1114		✗	if (!s->ifft) {
1115		✗	s->ifft = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->ifft));
1116		✗	if (!s->ifft)
1117		✗	return AVERROR(ENOMEM);
1118			}
1119			}
1120
1121			/* (re-)configuration if the video output changed (or first init) */
1122		✗	if (fft_size != s->fft_size) {
1123			AVFrame *outpicref;
1124
1125		✗	s->fft_size = fft_size;
1126
1127			/* FFT buffers: x2 for each (display) channel buffer.
1128			* Note: we use free and malloc instead of a realloc-like function to
1129			* make sure the buffer is aligned in memory for the FFT functions. */
1130		✗	for (i = 0; i < s->nb_display_channels; i++) {
1131		✗	if (s->stop) {
1132		✗	av_tx_uninit(&s->ifft[i]);
1133		✗	av_freep(&s->fft_scratch[i]);
1134			}
1135		✗	av_tx_uninit(&s->fft[i]);
1136		✗	av_freep(&s->fft_in[i]);
1137		✗	av_freep(&s->fft_data[i]);
1138			}
1139		✗	av_freep(&s->fft_data);
1140
1141		✗	s->nb_display_channels = inlink->ch_layout.nb_channels;
1142		✗	for (i = 0; i < s->nb_display_channels; i++) {
1143		✗	float scale = 1.f;
1144
1145		✗	ret = av_tx_init(&s->fft[i], &s->tx_fn, AV_TX_FLOAT_FFT, 0, fft_size << (!!s->stop), &scale, 0);
1146		✗	if (s->stop) {
1147		✗	ret = av_tx_init(&s->ifft[i], &s->itx_fn, AV_TX_FLOAT_FFT, 1, fft_size << (!!s->stop), &scale, 0);
1148		✗	if (ret < 0) {
1149		✗	av_log(ctx, AV_LOG_ERROR, "Unable to create Inverse FFT context. "
1150			"The window size might be too high.\n");
1151		✗	return ret;
1152			}
1153			}
1154		✗	if (ret < 0) {
1155		✗	av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
1156			"The window size might be too high.\n");
1157		✗	return ret;
1158			}
1159			}
1160
1161		✗	s->magnitudes = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes));
1162		✗	if (!s->magnitudes)
1163		✗	return AVERROR(ENOMEM);
1164		✗	for (i = 0; i < s->nb_display_channels; i++) {
1165		✗	s->magnitudes[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->magnitudes));
1166		✗	if (!s->magnitudes[i])
1167		✗	return AVERROR(ENOMEM);
1168			}
1169
1170		✗	s->phases = av_calloc(s->nb_display_channels, sizeof(*s->phases));
1171		✗	if (!s->phases)
1172		✗	return AVERROR(ENOMEM);
1173		✗	for (i = 0; i < s->nb_display_channels; i++) {
1174		✗	s->phases[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->phases));
1175		✗	if (!s->phases[i])
1176		✗	return AVERROR(ENOMEM);
1177			}
1178
1179		✗	av_freep(&s->color_buffer);
1180		✗	s->color_buffer = av_calloc(s->nb_display_channels, sizeof(*s->color_buffer));
1181		✗	if (!s->color_buffer)
1182		✗	return AVERROR(ENOMEM);
1183		✗	for (i = 0; i < s->nb_display_channels; i++) {
1184		✗	s->color_buffer[i] = av_calloc(s->orientation == VERTICAL ? s->h * 4 : s->w * 4, sizeof(**s->color_buffer));
1185		✗	if (!s->color_buffer[i])
1186		✗	return AVERROR(ENOMEM);
1187			}
1188
1189		✗	s->fft_in = av_calloc(s->nb_display_channels, sizeof(*s->fft_in));
1190		✗	if (!s->fft_in)
1191		✗	return AVERROR(ENOMEM);
1192		✗	s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data));
1193		✗	if (!s->fft_data)
1194		✗	return AVERROR(ENOMEM);
1195		✗	s->fft_scratch = av_calloc(s->nb_display_channels, sizeof(*s->fft_scratch));
1196		✗	if (!s->fft_scratch)
1197		✗	return AVERROR(ENOMEM);
1198		✗	for (i = 0; i < s->nb_display_channels; i++) {
1199		✗	s->fft_in[i] = av_calloc(s->buf_size, sizeof(**s->fft_in));
1200		✗	if (!s->fft_in[i])
1201		✗	return AVERROR(ENOMEM);
1202
1203		✗	s->fft_data[i] = av_calloc(s->buf_size, sizeof(**s->fft_data));
1204		✗	if (!s->fft_data[i])
1205		✗	return AVERROR(ENOMEM);
1206
1207		✗	s->fft_scratch[i] = av_calloc(s->buf_size, sizeof(**s->fft_scratch));
1208		✗	if (!s->fft_scratch[i])
1209		✗	return AVERROR(ENOMEM);
1210			}
1211
1212			/* pre-calc windowing function */
1213		✗	s->window_func_lut =
1214		✗	av_realloc_f(s->window_func_lut, s->win_size,
1215			sizeof(*s->window_func_lut));
1216		✗	if (!s->window_func_lut)
1217		✗	return AVERROR(ENOMEM);
1218		✗	generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
1219		✗	if (s->overlap == 1)
1220		✗	s->overlap = overlap;
1221		✗	s->hop_size = (1.f - s->overlap) * s->win_size;
1222		✗	if (s->hop_size < 1) {
1223		✗	av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
1224		✗	return AVERROR(EINVAL);
1225			}
1226
1227		✗	for (s->win_scale = 0, i = 0; i < s->win_size; i++) {
1228		✗	s->win_scale += s->window_func_lut[i] * s->window_func_lut[i];
1229			}
1230		✗	s->win_scale = 1.f / sqrtf(s->win_scale);
1231
1232			/* prepare the initial picref buffer (black frame) */
1233		✗	av_frame_free(&s->outpicref);
1234		✗	s->outpicref = outpicref =
1235		✗	ff_get_video_buffer(outlink, outlink->w, outlink->h);
1236		✗	if (!outpicref)
1237		✗	return AVERROR(ENOMEM);
1238		✗	outpicref->sample_aspect_ratio = (AVRational){1,1};
1239		✗	for (i = 0; i < outlink->h; i++) {
1240		✗	memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
1241		✗	memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
1242		✗	memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
1243		✗	if (outpicref->data[3])
1244		✗	memset(outpicref->data[3] + i * outpicref->linesize[3], 0, outlink->w);
1245			}
1246		✗	outpicref->color_range = AVCOL_RANGE_JPEG;
1247
1248		✗	if (!s->single_pic && s->legend)
1249		✗	draw_legend(ctx, 0);
1250			}
1251
1252		✗	if ((s->orientation == VERTICAL && s->xpos >= s->w) ||
1253		✗	(s->orientation == HORIZONTAL && s->xpos >= s->h))
1254		✗	s->xpos = 0;
1255
1256		✗	if (s->sliding == LREPLACE) {
1257		✗	if (s->orientation == VERTICAL)
1258		✗	s->xpos = s->w - 1;
1259		✗	if (s->orientation == HORIZONTAL)
1260		✗	s->xpos = s->h - 1;
1261			}
1262
1263		✗	s->auto_frame_rate = av_make_q(inlink->sample_rate, s->hop_size);
1264		✗	if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
1265		✗	s->auto_frame_rate = av_mul_q(s->auto_frame_rate, av_make_q(1, s->w));
1266		✗	if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
1267		✗	s->auto_frame_rate = av_mul_q(s->auto_frame_rate, av_make_q(1, s->h));
1268		✗	if (!s->single_pic && strcmp(s->rate_str, "auto")) {
1269		✗	int ret = av_parse_video_rate(&s->frame_rate, s->rate_str);
1270		✗	if (ret < 0)
1271		✗	return ret;
1272		✗	} else if (s->single_pic) {
1273		✗	s->frame_rate = av_make_q(1, 1);
1274			} else {
1275		✗	s->frame_rate = s->auto_frame_rate;
1276			}
1277		✗	l->frame_rate = s->frame_rate;
1278		✗	outlink->time_base = av_inv_q(l->frame_rate);
1279
1280		✗	if (s->orientation == VERTICAL) {
1281		✗	s->combine_buffer =
1282		✗	av_realloc_f(s->combine_buffer, s->h * 4,
1283			sizeof(*s->combine_buffer));
1284			} else {
1285		✗	s->combine_buffer =
1286		✗	av_realloc_f(s->combine_buffer, s->w * 4,
1287			sizeof(*s->combine_buffer));
1288			}
1289		✗	if (!s->combine_buffer)
1290		✗	return AVERROR(ENOMEM);
1291
1292		✗	av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d FFT window size:%d\n",
1293			s->w, s->h, s->win_size);
1294
1295		✗	s->in_frame = ff_get_audio_buffer(inlink, s->win_size);
1296		✗	if (!s->in_frame)
1297		✗	return AVERROR(ENOMEM);
1298
1299		✗	s->frames = av_fast_realloc(NULL, &s->frames_size,
1300			DEFAULT_LENGTH * sizeof(*(s->frames)));
1301		✗	if (!s->frames)
1302		✗	return AVERROR(ENOMEM);
1303
1304		✗	return 0;
1305			}
1306
1307			#define RE(y, ch) s->fft_data[ch][y].re
1308			#define IM(y, ch) s->fft_data[ch][y].im
1309			#define MAGNITUDE(y, ch) hypotf(RE(y, ch), IM(y, ch))
1310			#define PHASE(y, ch) atan2f(IM(y, ch), RE(y, ch))
1311
1312		✗	static int calc_channel_magnitudes(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1313			{
1314		✗	ShowSpectrumContext *s = ctx->priv;
1315		✗	const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
1316		✗	int y, h = s->orientation == VERTICAL ? s->h : s->w;
1317		✗	const float f = s->gain * w;
1318		✗	const int ch = jobnr;
1319		✗	float *magnitudes = s->magnitudes[ch];
1320
1321		✗	for (y = 0; y < h; y++)
1322		✗	magnitudes[y] = MAGNITUDE(y, ch) * f;
1323
1324		✗	return 0;
1325			}
1326
1327		✗	static int calc_channel_phases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1328			{
1329		✗	ShowSpectrumContext *s = ctx->priv;
1330		✗	const int h = s->orientation == VERTICAL ? s->h : s->w;
1331		✗	const int ch = jobnr;
1332		✗	float *phases = s->phases[ch];
1333			int y;
1334
1335		✗	for (y = 0; y < h; y++)
1336		✗	phases[y] = (PHASE(y, ch) / M_PI + 1) / 2;
1337
1338		✗	return 0;
1339			}
1340
1341		✗	static void unwrap(float *x, int N, float tol, float *mi, float *ma)
1342			{
1343		✗	const float rng = 2.f * M_PI;
1344		✗	float prev_p = 0.f;
1345		✗	float max = -FLT_MAX;
1346		✗	float min = FLT_MAX;
1347
1348		✗	for (int i = 0; i < N; i++) {
1349		✗	const float d = x[FFMIN(i + 1, N)] - x[i];
1350		✗	const float p = ceilf(fabsf(d) / rng) * rng * (((d < tol) > 0.f) - ((d > -tol) > 0.f));
1351
1352		✗	x[i] += p + prev_p;
1353		✗	prev_p += p;
1354		✗	max = fmaxf(x[i], max);
1355		✗	min = fminf(x[i], min);
1356			}
1357
1358		✗	*mi = min;
1359		✗	*ma = max;
1360		✗	}
1361
1362		✗	static int calc_channel_uphases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1363			{
1364		✗	ShowSpectrumContext *s = ctx->priv;
1365		✗	const int h = s->orientation == VERTICAL ? s->h : s->w;
1366		✗	const int ch = jobnr;
1367		✗	float *phases = s->phases[ch];
1368			float min, max, scale;
1369			int y;
1370
1371		✗	for (y = 0; y < h; y++)
1372		✗	phases[y] = PHASE(y, ch);
1373		✗	unwrap(phases, h, M_PI, &min, &max);
1374		✗	scale = 1.f / (max - min + FLT_MIN);
1375		✗	for (y = 0; y < h; y++)
1376		✗	phases[y] = fabsf((phases[y] - min) * scale);
1377
1378		✗	return 0;
1379			}
1380
1381		✗	static void acalc_magnitudes(ShowSpectrumContext *s)
1382			{
1383		✗	const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
1384		✗	int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
1385		✗	const float f = s->gain * w;
1386
1387		✗	for (ch = 0; ch < s->nb_display_channels; ch++) {
1388		✗	float *magnitudes = s->magnitudes[ch];
1389
1390		✗	for (y = 0; y < h; y++)
1391		✗	magnitudes[y] += MAGNITUDE(y, ch) * f;
1392			}
1393		✗	}
1394
1395		✗	static void scale_magnitudes(ShowSpectrumContext *s, float scale)
1396			{
1397		✗	int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
1398
1399		✗	for (ch = 0; ch < s->nb_display_channels; ch++) {
1400		✗	float *magnitudes = s->magnitudes[ch];
1401
1402		✗	for (y = 0; y < h; y++)
1403		✗	magnitudes[y] *= scale;
1404			}
1405		✗	}
1406
1407		✗	static void clear_combine_buffer(ShowSpectrumContext *s, int size)
1408			{
1409			int y;
1410
1411		✗	for (y = 0; y < size; y++) {
1412		✗	s->combine_buffer[4 * y ] = 0;
1413		✗	s->combine_buffer[4 * y + 1] = 127.5;
1414		✗	s->combine_buffer[4 * y + 2] = 127.5;
1415		✗	s->combine_buffer[4 * y + 3] = 0;
1416			}
1417		✗	}
1418
1419		✗	static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
1420			{
1421		✗	AVFilterContext *ctx = inlink->dst;
1422		✗	AVFilterLink *outlink = ctx->outputs[0];
1423		✗	ShowSpectrumContext *s = ctx->priv;
1424		✗	AVFrame *outpicref = s->outpicref;
1425		✗	int ret, plane, x, y, z = s->orientation == VERTICAL ? s->h : s->w;
1426		✗	const int alpha = outpicref->data[3] != NULL;
1427
1428			/* fill a new spectrum column */
1429			/* initialize buffer for combining to black */
1430		✗	clear_combine_buffer(s, z);
1431
1432		✗	ff_filter_execute(ctx, s->plot_channel, NULL, NULL, s->nb_display_channels);
1433
1434		✗	for (y = 0; y < z * 4; y++) {
1435		✗	for (x = 0; x < s->nb_display_channels; x++) {
1436		✗	s->combine_buffer[y] += s->color_buffer[x][y];
1437			}
1438			}
1439
1440		✗	ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
1441		✗	if (ret < 0)
1442		✗	return ret;
1443		✗	outpicref = s->outpicref;
1444			/* copy to output */
1445		✗	if (s->orientation == VERTICAL) {
1446		✗	if (s->sliding == SCROLL) {
1447		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1448		✗	for (y = 0; y < s->h; y++) {
1449		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1450		✗	(y + s->start_y) * outpicref->linesize[plane];
1451		✗	memmove(p, p + 1, s->w - 1);
1452			}
1453			}
1454		✗	s->xpos = s->w - 1;
1455		✗	} else if (s->sliding == RSCROLL) {
1456		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1457		✗	for (y = 0; y < s->h; y++) {
1458		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1459		✗	(y + s->start_y) * outpicref->linesize[plane];
1460		✗	memmove(p + 1, p, s->w - 1);
1461			}
1462			}
1463		✗	s->xpos = 0;
1464			}
1465		✗	for (plane = 0; plane < 3; plane++) {
1466		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1467		✗	(outlink->h - 1 - s->start_y) * outpicref->linesize[plane] +
1468		✗	s->xpos;
1469		✗	for (y = 0; y < s->h; y++) {
1470		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * y + plane], 0, 255));
1471		✗	p -= outpicref->linesize[plane];
1472			}
1473			}
1474		✗	if (alpha) {
1475		✗	uint8_t *p = outpicref->data[3] + s->start_x +
1476		✗	(outlink->h - 1 - s->start_y) * outpicref->linesize[3] +
1477		✗	s->xpos;
1478		✗	for (y = 0; y < s->h; y++) {
1479		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * y + 3], 0, 255));
1480		✗	p -= outpicref->linesize[3];
1481			}
1482			}
1483			} else {
1484		✗	if (s->sliding == SCROLL) {
1485		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1486		✗	for (y = 1; y < s->h; y++) {
1487		✗	memmove(outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
1488		✗	outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
1489		✗	s->w);
1490			}
1491			}
1492		✗	s->xpos = s->h - 1;
1493		✗	} else if (s->sliding == RSCROLL) {
1494		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1495		✗	for (y = s->h - 1; y >= 1; y--) {
1496		✗	memmove(outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
1497		✗	outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
1498		✗	s->w);
1499			}
1500			}
1501		✗	s->xpos = 0;
1502			}
1503		✗	for (plane = 0; plane < 3; plane++) {
1504		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1505		✗	(s->xpos + s->start_y) * outpicref->linesize[plane];
1506		✗	for (x = 0; x < s->w; x++) {
1507		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * x + plane], 0, 255));
1508		✗	p++;
1509			}
1510			}
1511		✗	if (alpha) {
1512		✗	uint8_t *p = outpicref->data[3] + s->start_x +
1513		✗	(s->xpos + s->start_y) * outpicref->linesize[3];
1514		✗	for (x = 0; x < s->w; x++) {
1515		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * x + 3], 0, 255));
1516		✗	p++;
1517			}
1518			}
1519			}
1520
1521		✗	if (s->sliding != FULLFRAME || s->xpos == 0)
1522		✗	s->pts = outpicref->pts = av_rescale_q(s->in_pts, inlink->time_base, outlink->time_base);
1523
1524		✗	if (s->sliding == LREPLACE) {
1525		✗	s->xpos--;
1526		✗	if (s->orientation == VERTICAL && s->xpos < 0)
1527		✗	s->xpos = s->w - 1;
1528		✗	if (s->orientation == HORIZONTAL && s->xpos < 0)
1529		✗	s->xpos = s->h - 1;
1530			} else {
1531		✗	s->xpos++;
1532		✗	if (s->orientation == VERTICAL && s->xpos >= s->w)
1533		✗	s->xpos = 0;
1534		✗	if (s->orientation == HORIZONTAL && s->xpos >= s->h)
1535		✗	s->xpos = 0;
1536			}
1537
1538		✗	if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
1539		✗	if (s->old_pts < outpicref->pts || s->sliding == FULLFRAME ||
1540		✗	(s->eof && ff_inlink_queued_samples(inlink) <= s->hop_size)) {
1541			AVFrame *clone;
1542
1543		✗	if (s->legend) {
1544		✗	char *units = get_time(ctx, insamples->pts /(float)inlink->sample_rate, x);
1545		✗	if (!units)
1546		✗	return AVERROR(ENOMEM);
1547
1548		✗	if (s->orientation == VERTICAL) {
1549		✗	for (y = 0; y < 10; y++) {
1550		✗	memset(s->outpicref->data[0] + outlink->w / 2 - 4 * s->old_len +
1551		✗	(outlink->h - s->start_y / 2 - 20 + y) * s->outpicref->linesize[0], 0, 10 * s->old_len);
1552			}
1553		✗	drawtext(s->outpicref,
1554		✗	outlink->w / 2 - 4 * strlen(units),
1555		✗	outlink->h - s->start_y / 2 - 20,
1556			units, 0);
1557			} else {
1558		✗	for (y = 0; y < 10 * s->old_len; y++) {
1559		✗	memset(s->outpicref->data[0] + s->start_x / 7 + 20 +
1560		✗	(outlink->h / 2 - 4 * s->old_len + y) * s->outpicref->linesize[0], 0, 10);
1561			}
1562		✗	drawtext(s->outpicref,
1563		✗	s->start_x / 7 + 20,
1564		✗	outlink->h / 2 - 4 * strlen(units),
1565			units, 1);
1566			}
1567		✗	s->old_len = strlen(units);
1568		✗	av_free(units);
1569			}
1570		✗	s->old_pts = outpicref->pts;
1571		✗	clone = av_frame_clone(s->outpicref);
1572		✗	if (!clone)
1573		✗	return AVERROR(ENOMEM);
1574		✗	ret = ff_filter_frame(outlink, clone);
1575		✗	if (ret < 0)
1576		✗	return ret;
1577		✗	return 0;
1578			}
1579			}
1580
1581		✗	return 1;
1582			}
1583
1584			#if CONFIG_SHOWSPECTRUM_FILTER
1585
1586		✗	static int activate(AVFilterContext *ctx)
1587			{
1588		✗	AVFilterLink *inlink = ctx->inputs[0];
1589		✗	AVFilterLink *outlink = ctx->outputs[0];
1590		✗	ShowSpectrumContext *s = ctx->priv;
1591			int ret, status;
1592			int64_t pts;
1593
1594		✗	FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
1595
1596		✗	if (s->outpicref && ff_inlink_queued_samples(inlink) > 0) {
1597			AVFrame *fin;
1598
1599		✗	ret = ff_inlink_consume_samples(inlink, s->hop_size, s->hop_size, &fin);
1600		✗	if (ret < 0)
1601		✗	return ret;
1602		✗	if (ret > 0) {
1603		✗	ff_filter_execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
1604
1605		✗	if (s->data == D_MAGNITUDE)
1606		✗	ff_filter_execute(ctx, calc_channel_magnitudes, NULL, NULL, s->nb_display_channels);
1607
1608		✗	if (s->data == D_PHASE)
1609		✗	ff_filter_execute(ctx, calc_channel_phases, NULL, NULL, s->nb_display_channels);
1610
1611		✗	if (s->data == D_UPHASE)
1612		✗	ff_filter_execute(ctx, calc_channel_uphases, NULL, NULL, s->nb_display_channels);
1613
1614		✗	if (s->sliding != FULLFRAME || s->xpos == 0)
1615		✗	s->in_pts = fin->pts;
1616		✗	ret = plot_spectrum_column(inlink, fin);
1617		✗	av_frame_free(&fin);
1618		✗	if (ret <= 0)
1619		✗	return ret;
1620			}
1621			}
1622
1623		✗	if (s->eof && s->sliding == FULLFRAME &&
1624		✗	s->xpos > 0 && s->outpicref) {
1625
1626		✗	if (s->orientation == VERTICAL) {
1627		✗	for (int i = 0; i < outlink->h; i++) {
1628		✗	memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos);
1629		✗	memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos);
1630		✗	memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos);
1631		✗	if (s->outpicref->data[3])
1632		✗	memset(s->outpicref->data[3] + i * s->outpicref->linesize[3] + s->xpos, 0, outlink->w - s->xpos);
1633			}
1634			} else {
1635		✗	for (int i = s->xpos; i < outlink->h; i++) {
1636		✗	memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w);
1637		✗	memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w);
1638		✗	memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w);
1639		✗	if (s->outpicref->data[3])
1640		✗	memset(s->outpicref->data[3] + i * s->outpicref->linesize[3], 0, outlink->w);
1641			}
1642			}
1643		✗	s->outpicref->pts = av_rescale_q(s->in_pts, inlink->time_base, outlink->time_base);
1644		✗	pts = s->outpicref->pts;
1645		✗	ret = ff_filter_frame(outlink, s->outpicref);
1646		✗	s->outpicref = NULL;
1647		✗	ff_outlink_set_status(outlink, AVERROR_EOF, pts);
1648		✗	return 0;
1649			}
1650
1651		✗	if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
1652		✗	s->eof = status == AVERROR_EOF;
1653		✗	ff_filter_set_ready(ctx, 100);
1654		✗	return 0;
1655			}
1656
1657		✗	if (s->eof) {
1658		✗	ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
1659		✗	return 0;
1660			}
1661
1662		✗	if (ff_inlink_queued_samples(inlink) >= s->hop_size) {
1663		✗	ff_filter_set_ready(ctx, 10);
1664		✗	return 0;
1665			}
1666
1667		✗	if (ff_outlink_frame_wanted(outlink)) {
1668		✗	ff_inlink_request_frame(inlink);
1669		✗	return 0;
1670			}
1671
1672		✗	return FFERROR_NOT_READY;
1673			}
1674
1675			static const AVFilterPad showspectrum_outputs[] = {
1676			{
1677			.name = "default",
1678			.type = AVMEDIA_TYPE_VIDEO,
1679			.config_props = config_output,
1680			},
1681			};
1682
1683			const AVFilter ff_avf_showspectrum = {
1684			.name = "showspectrum",
1685			.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output."),
1686			.uninit = uninit,
1687			.priv_size = sizeof(ShowSpectrumContext),
1688			FILTER_INPUTS(ff_audio_default_filterpad),
1689			FILTER_OUTPUTS(showspectrum_outputs),
1690			FILTER_QUERY_FUNC2(query_formats),
1691			.activate = activate,
1692			.priv_class = &showspectrum_class,
1693			.flags = AVFILTER_FLAG_SLICE_THREADS,
1694			};
1695			#endif // CONFIG_SHOWSPECTRUM_FILTER
1696
1697			#if CONFIG_SHOWSPECTRUMPIC_FILTER
1698
1699			static const AVOption showspectrumpic_options[] = {
1700			{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
1701			{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
1702			{ "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_MODES-1, FLAGS, .unit = "mode" },
1703			{ "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, .unit = "mode" },
1704			{ "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, .unit = "mode" },
1705			{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=INTENSITY}, 0, NB_CLMODES-1, FLAGS, .unit = "color" },
1706			{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, .unit = "color" },
1707			{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, .unit = "color" },
1708			{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, .unit = "color" },
1709			{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, .unit = "color" },
1710			{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, .unit = "color" },
1711			{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, .unit = "color" },
1712			{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, .unit = "color" },
1713			{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, .unit = "color" },
1714			{ "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, .unit = "color" },
1715			{ "magma", "magma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MAGMA}, 0, 0, FLAGS, .unit = "color" },
1716			{ "green", "green based coloring", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, FLAGS, .unit = "color" },
1717			{ "viridis", "viridis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=VIRIDIS}, 0, 0, FLAGS, .unit = "color" },
1718			{ "plasma", "plasma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=PLASMA}, 0, 0, FLAGS, .unit = "color" },
1719			{ "cividis", "cividis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=CIVIDIS}, 0, 0, FLAGS, .unit = "color" },
1720			{ "terrain", "terrain based coloring", 0, AV_OPT_TYPE_CONST, {.i64=TERRAIN}, 0, 0, FLAGS, .unit = "color" },
1721			{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, .unit = "scale" },
1722			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "scale" },
1723			{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, .unit = "scale" },
1724			{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, .unit = "scale" },
1725			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "scale" },
1726			{ "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, .unit = "scale" },
1727			{ "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, .unit = "scale" },
1728			{ "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=F_LINEAR}, 0, NB_FSCALES-1, FLAGS, .unit = "fscale" },
1729			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=F_LINEAR}, 0, 0, FLAGS, .unit = "fscale" },
1730			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=F_LOG}, 0, 0, FLAGS, .unit = "fscale" },
1731			{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
1732			WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_HANNING),
1733			{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, .unit = "orientation" },
1734			{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, .unit = "orientation" },
1735			{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, .unit = "orientation" },
1736			{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
1737			{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
1738			{ "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
1739			{ "start", "start frequency", OFFSET(start), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
1740			{ "stop", "stop frequency", OFFSET(stop), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
1741			{ "drange", "set dynamic range in dBFS", OFFSET(drange), AV_OPT_TYPE_FLOAT, {.dbl = 120}, 10, 200, FLAGS },
1742			{ "limit", "set upper limit in dBFS", OFFSET(limit), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -100, 100, FLAGS },
1743			{ "opacity", "set opacity strength", OFFSET(opacity_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 10, FLAGS },
1744			{ NULL }
1745			};
1746
1747			AVFILTER_DEFINE_CLASS(showspectrumpic);
1748
1749		✗	static int showspectrumpic_request_frame(AVFilterLink *outlink)
1750			{
1751		✗	AVFilterContext *ctx = outlink->src;
1752		✗	ShowSpectrumContext *s = ctx->priv;
1753		✗	AVFilterLink *inlink = ctx->inputs[0];
1754			int ret;
1755
1756		✗	ret = ff_request_frame(inlink);
1757		✗	if (ret == AVERROR_EOF && s->outpicref && s->samples > 0) {
1758		✗	int consumed = 0;
1759		✗	int x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
1760		✗	unsigned int nb_frame = 0;
1761			int ch, spf, spb;
1762		✗	int src_offset = 0;
1763			AVFrame *fin;
1764
1765		✗	spf = s->win_size * (s->samples / ((s->win_size * sz) * ceil(s->samples / (float)(s->win_size * sz))));
1766		✗	spf = FFMAX(1, spf);
1767		✗	s->hop_size = spf;
1768
1769		✗	spb = (s->samples / (spf * sz)) * spf;
1770
1771		✗	fin = ff_get_audio_buffer(inlink, spf);
1772		✗	if (!fin)
1773		✗	return AVERROR(ENOMEM);
1774
1775		✗	while (x < sz) {
1776		✗	int acc_samples = 0;
1777		✗	int dst_offset = 0;
1778
1779		✗	while (nb_frame < s->nb_frames) {
1780		✗	AVFrame *cur_frame = s->frames[nb_frame];
1781		✗	int cur_frame_samples = cur_frame->nb_samples;
1782		✗	int nb_samples = 0;
1783
1784		✗	if (acc_samples < spf) {
1785		✗	nb_samples = FFMIN(spf - acc_samples, cur_frame_samples - src_offset);
1786		✗	acc_samples += nb_samples;
1787		✗	av_samples_copy(fin->extended_data, cur_frame->extended_data,
1788			dst_offset, src_offset, nb_samples,
1789			cur_frame->ch_layout.nb_channels, AV_SAMPLE_FMT_FLTP);
1790			}
1791
1792		✗	src_offset += nb_samples;
1793		✗	dst_offset += nb_samples;
1794		✗	if (cur_frame_samples <= src_offset) {
1795		✗	av_frame_free(&s->frames[nb_frame]);
1796		✗	nb_frame++;
1797		✗	src_offset = 0;
1798			}
1799
1800		✗	if (acc_samples == spf)
1801		✗	break;
1802			}
1803
1804		✗	ff_filter_execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
1805		✗	acalc_magnitudes(s);
1806
1807		✗	consumed += spf;
1808		✗	if (consumed >= spb) {
1809		✗	int h = s->orientation == VERTICAL ? s->h : s->w;
1810
1811		✗	scale_magnitudes(s, 1.f / (consumed / spf));
1812		✗	plot_spectrum_column(inlink, fin);
1813		✗	consumed = 0;
1814		✗	x++;
1815		✗	for (ch = 0; ch < s->nb_display_channels; ch++)
1816		✗	memset(s->magnitudes[ch], 0, h * sizeof(float));
1817			}
1818			}
1819
1820		✗	av_frame_free(&fin);
1821		✗	s->outpicref->pts = 0;
1822
1823		✗	if (s->legend)
1824		✗	draw_legend(ctx, s->samples);
1825
1826		✗	ret = ff_filter_frame(outlink, s->outpicref);
1827		✗	s->outpicref = NULL;
1828			}
1829
1830		✗	return ret;
1831			}
1832
1833		✗	static int showspectrumpic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
1834			{
1835		✗	AVFilterContext *ctx = inlink->dst;
1836		✗	ShowSpectrumContext *s = ctx->priv;
1837			void *ptr;
1838
1839		✗	if (s->nb_frames + 1ULL > s->frames_size / sizeof(*(s->frames))) {
1840		✗	ptr = av_fast_realloc(s->frames, &s->frames_size, s->frames_size * 2);
1841		✗	if (!ptr)
1842		✗	return AVERROR(ENOMEM);
1843		✗	s->frames = ptr;
1844			}
1845
1846		✗	s->frames[s->nb_frames] = insamples;
1847		✗	s->samples += insamples->nb_samples;
1848		✗	s->nb_frames++;
1849
1850		✗	return 0;
1851			}
1852
1853			static const AVFilterPad showspectrumpic_inputs[] = {
1854			{
1855			.name = "default",
1856			.type = AVMEDIA_TYPE_AUDIO,
1857			.filter_frame = showspectrumpic_filter_frame,
1858			},
1859			};
1860
1861			static const AVFilterPad showspectrumpic_outputs[] = {
1862			{
1863			.name = "default",
1864			.type = AVMEDIA_TYPE_VIDEO,
1865			.config_props = config_output,
1866			.request_frame = showspectrumpic_request_frame,
1867			},
1868			};
1869
1870			const AVFilter ff_avf_showspectrumpic = {
1871			.name = "showspectrumpic",
1872			.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output single picture."),
1873			.uninit = uninit,
1874			.priv_size = sizeof(ShowSpectrumContext),
1875			FILTER_INPUTS(showspectrumpic_inputs),
1876			FILTER_OUTPUTS(showspectrumpic_outputs),
1877			FILTER_QUERY_FUNC2(query_formats),
1878			.priv_class = &showspectrumpic_class,
1879			.flags = AVFILTER_FLAG_SLICE_THREADS,
1880			};
1881
1882			#endif // CONFIG_SHOWSPECTRUMPIC_FILTER
1883