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 "internal.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(AVFilterContext *ctx)
363			{
364		✗	AVFilterFormats *formats = NULL;
365		✗	AVFilterChannelLayouts *layouts = NULL;
366		✗	AVFilterLink *inlink = ctx->inputs[0];
367		✗	AVFilterLink *outlink = ctx->outputs[0];
368			static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
369			static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVA444P, AV_PIX_FMT_NONE };
370			int ret;
371
372			/* set input audio formats */
373		✗	formats = ff_make_format_list(sample_fmts);
374		✗	if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
375		✗	return ret;
376
377		✗	layouts = ff_all_channel_counts();
378		✗	if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
379		✗	return ret;
380
381		✗	formats = ff_all_samplerates();
382		✗	if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
383		✗	return ret;
384
385			/* set output video format */
386		✗	formats = ff_make_format_list(pix_fmts);
387		✗	if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
388		✗	return ret;
389
390		✗	return 0;
391			}
392
393		✗	static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
394			{
395		✗	ShowSpectrumContext *s = ctx->priv;
396		✗	AVFilterLink *inlink = ctx->inputs[0];
397		✗	const float *window_func_lut = s->window_func_lut;
398		✗	AVFrame *fin = arg;
399		✗	const int ch = jobnr;
400			int n;
401
402			/* fill FFT input with the number of samples available */
403		✗	const float *p = (float *)fin->extended_data[ch];
404		✗	float *in_frame = (float *)s->in_frame->extended_data[ch];
405
406		✗	memmove(in_frame, in_frame + s->hop_size, (s->fft_size - s->hop_size) * sizeof(float));
407		✗	memcpy(in_frame + s->fft_size - s->hop_size, p, fin->nb_samples * sizeof(float));
408
409		✗	for (int i = fin->nb_samples; i < s->hop_size; i++)
410		✗	in_frame[i + s->fft_size - s->hop_size] = 0.f;
411
412		✗	if (s->stop) {
413			float theta, phi, psi, a, b, S, c;
414		✗	AVComplexFloat *f = s->fft_in[ch];
415		✗	AVComplexFloat *g = s->fft_data[ch];
416		✗	AVComplexFloat *h = s->fft_scratch[ch];
417		✗	int L = s->buf_size;
418		✗	int N = s->win_size;
419		✗	int M = s->win_size / 2;
420
421		✗	for (n = 0; n < s->win_size; n++) {
422		✗	s->fft_data[ch][n].re = in_frame[n] * window_func_lut[n];
423		✗	s->fft_data[ch][n].im = 0;
424			}
425
426		✗	phi = 2.f * M_PI * (s->stop - s->start) / (float)inlink->sample_rate / (M - 1);
427		✗	theta = 2.f * M_PI * s->start / (float)inlink->sample_rate;
428
429		✗	for (int n = 0; n < M; n++) {
430		✗	h[n].re = cosf(n * n / 2.f * phi);
431		✗	h[n].im = sinf(n * n / 2.f * phi);
432			}
433
434		✗	for (int n = M; n < L; n++) {
435		✗	h[n].re = 0.f;
436		✗	h[n].im = 0.f;
437			}
438
439		✗	for (int n = L - N; n < L; n++) {
440		✗	h[n].re = cosf((L - n) * (L - n) / 2.f * phi);
441		✗	h[n].im = sinf((L - n) * (L - n) / 2.f * phi);
442			}
443
444		✗	for (int n = N; n < L; n++) {
445		✗	g[n].re = 0.f;
446		✗	g[n].im = 0.f;
447			}
448
449		✗	for (int n = 0; n < N; n++) {
450		✗	psi = n * theta + n * n / 2.f * phi;
451		✗	c = cosf(psi);
452		✗	S = -sinf(psi);
453		✗	a = c * g[n].re - S * g[n].im;
454		✗	b = S * g[n].re + c * g[n].im;
455		✗	g[n].re = a;
456		✗	g[n].im = b;
457			}
458
459		✗	memcpy(f, h, s->buf_size * sizeof(*f));
460		✗	s->tx_fn(s->fft[ch], h, f, sizeof(AVComplexFloat));
461
462		✗	memcpy(f, g, s->buf_size * sizeof(*f));
463		✗	s->tx_fn(s->fft[ch], g, f, sizeof(AVComplexFloat));
464
465		✗	for (int n = 0; n < L; n++) {
466		✗	c = g[n].re;
467		✗	S = g[n].im;
468		✗	a = c * h[n].re - S * h[n].im;
469		✗	b = S * h[n].re + c * h[n].im;
470
471		✗	g[n].re = a / L;
472		✗	g[n].im = b / L;
473			}
474
475		✗	memcpy(f, g, s->buf_size * sizeof(*f));
476		✗	s->itx_fn(s->ifft[ch], g, f, sizeof(AVComplexFloat));
477
478		✗	for (int k = 0; k < M; k++) {
479		✗	psi = k * k / 2.f * phi;
480		✗	c = cosf(psi);
481		✗	S = -sinf(psi);
482		✗	a = c * g[k].re - S * g[k].im;
483		✗	b = S * g[k].re + c * g[k].im;
484		✗	s->fft_data[ch][k].re = a;
485		✗	s->fft_data[ch][k].im = b;
486			}
487			} else {
488		✗	for (n = 0; n < s->win_size; n++) {
489		✗	s->fft_in[ch][n].re = in_frame[n] * window_func_lut[n];
490		✗	s->fft_in[ch][n].im = 0;
491			}
492
493			/* run FFT on each samples set */
494		✗	s->tx_fn(s->fft[ch], s->fft_data[ch], s->fft_in[ch], sizeof(AVComplexFloat));
495			}
496
497		✗	return 0;
498			}
499
500		✗	static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
501			{
502			const uint8_t *font;
503			int font_height;
504
505		✗	font = avpriv_cga_font, font_height = 8;
506
507		✗	for (int i = 0; txt[i]; i++) {
508			int char_y, mask;
509
510		✗	if (o) {
511		✗	for (char_y = font_height - 1; char_y >= 0; char_y--) {
512		✗	uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
513		✗	for (mask = 0x80; mask; mask >>= 1) {
514		✗	if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
515		✗	p[char_y] = ~p[char_y];
516		✗	p += pic->linesize[0];
517			}
518			}
519			} else {
520		✗	uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
521		✗	for (char_y = 0; char_y < font_height; char_y++) {
522		✗	for (mask = 0x80; mask; mask >>= 1) {
523		✗	if (font[txt[i] * font_height + char_y] & mask)
524		✗	*p = ~(*p);
525		✗	p++;
526			}
527		✗	p += pic->linesize[0] - 8;
528			}
529			}
530			}
531
532		✗	for (int i = 0; txt[i] && pic->data[3]; i++) {
533			int char_y, mask;
534
535		✗	if (o) {
536		✗	for (char_y = font_height - 1; char_y >= 0; char_y--) {
537		✗	uint8_t *p = pic->data[3] + (y + i * 10) * pic->linesize[3] + x;
538		✗	for (mask = 0x80; mask; mask >>= 1) {
539		✗	for (int k = 0; k < 8; k++)
540		✗	p[k] = 255;
541		✗	p += pic->linesize[3];
542			}
543			}
544			} else {
545		✗	uint8_t *p = pic->data[3] + y*pic->linesize[3] + (x + i*8);
546		✗	for (char_y = 0; char_y < font_height; char_y++) {
547		✗	for (mask = 0x80; mask; mask >>= 1)
548		✗	*p++ = 255;
549		✗	p += pic->linesize[3] - 8;
550			}
551			}
552			}
553		✗	}
554
555		✗	static void color_range(ShowSpectrumContext *s, int ch,
556			float *yf, float *uf, float *vf)
557			{
558		✗	switch (s->mode) {
559		✗	case COMBINED:
560			// reduce range by channel count
561		✗	*yf = 256.0f / s->nb_display_channels;
562		✗	switch (s->color_mode) {
563		✗	case RAINBOW:
564			case MORELAND:
565			case NEBULAE:
566			case FIRE:
567			case FIERY:
568			case FRUIT:
569			case COOL:
570			case GREEN:
571			case VIRIDIS:
572			case PLASMA:
573			case CIVIDIS:
574			case TERRAIN:
575			case MAGMA:
576			case INTENSITY:
577		✗	*uf = *yf;
578		✗	*vf = *yf;
579		✗	break;
580		✗	case CHANNEL:
581			/* adjust saturation for mixed UV coloring */
582			/* this factor is correct for infinite channels, an approximation otherwise */
583		✗	*uf = *yf * M_PI;
584		✗	*vf = *yf * M_PI;
585		✗	break;
586		✗	default:
587		✗	av_assert0(0);
588			}
589		✗	break;
590		✗	case SEPARATE:
591			// full range
592		✗	*yf = 256.0f;
593		✗	*uf = 256.0f;
594		✗	*vf = 256.0f;
595		✗	break;
596		✗	default:
597		✗	av_assert0(0);
598			}
599
600		✗	if (s->color_mode == CHANNEL) {
601		✗	if (s->nb_display_channels > 1) {
602		✗	*uf *= 0.5f * sinf((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
603		✗	*vf *= 0.5f * cosf((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
604			} else {
605		✗	*uf *= 0.5f * sinf(M_PI * s->rotation);
606		✗	*vf *= 0.5f * cosf(M_PI * s->rotation + M_PI_2);
607			}
608			} else {
609		✗	*uf += *uf * sinf(M_PI * s->rotation);
610		✗	*vf += *vf * cosf(M_PI * s->rotation + M_PI_2);
611			}
612
613		✗	*uf *= s->saturation;
614		✗	*vf *= s->saturation;
615		✗	}
616
617		✗	static void pick_color(ShowSpectrumContext *s,
618			float yf, float uf, float vf,
619			float a, float *out)
620			{
621		✗	const float af = s->opacity_factor * 255.f;
622
623		✗	if (s->color_mode > CHANNEL) {
624		✗	const int cm = s->color_mode;
625			float y, u, v;
626			int i;
627
628		✗	for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++)
629		✗	if (color_table[cm][i].a >= a)
630		✗	break;
631			// i now is the first item >= the color
632			// now we know to interpolate between item i - 1 and i
633		✗	if (a <= color_table[cm][i - 1].a) {
634		✗	y = color_table[cm][i - 1].y;
635		✗	u = color_table[cm][i - 1].u;
636		✗	v = color_table[cm][i - 1].v;
637		✗	} else if (a >= color_table[cm][i].a) {
638		✗	y = color_table[cm][i].y;
639		✗	u = color_table[cm][i].u;
640		✗	v = color_table[cm][i].v;
641			} else {
642		✗	float start = color_table[cm][i - 1].a;
643		✗	float end = color_table[cm][i].a;
644		✗	float lerpfrac = (a - start) / (end - start);
645		✗	y = color_table[cm][i - 1].y * (1.0f - lerpfrac)
646		✗	+ color_table[cm][i].y * lerpfrac;
647		✗	u = color_table[cm][i - 1].u * (1.0f - lerpfrac)
648		✗	+ color_table[cm][i].u * lerpfrac;
649		✗	v = color_table[cm][i - 1].v * (1.0f - lerpfrac)
650		✗	+ color_table[cm][i].v * lerpfrac;
651			}
652
653		✗	out[0] = y * yf;
654		✗	out[1] = u * uf;
655		✗	out[2] = v * vf;
656		✗	out[3] = a * af;
657			} else {
658		✗	out[0] = a * yf;
659		✗	out[1] = a * uf;
660		✗	out[2] = a * vf;
661		✗	out[3] = a * af;
662			}
663		✗	}
664
665		✗	static char *get_time(AVFilterContext *ctx, float seconds, int x)
666			{
667			char *units;
668
669		✗	if (x == 0)
670		✗	units = av_asprintf("0");
671		✗	else if (log10(seconds) > 6)
672		✗	units = av_asprintf("%.2fh", seconds / (60 * 60));
673		✗	else if (log10(seconds) > 3)
674		✗	units = av_asprintf("%.2fm", seconds / 60);
675			else
676		✗	units = av_asprintf("%.2fs", seconds);
677		✗	return units;
678			}
679
680		✗	static float log_scale(const float bin,
681			const float bmin, const float bmax,
682			const float min, const float max)
683			{
684		✗	return exp2f(((bin - bmin) / (bmax - bmin)) * (log2f(max) - log2f(min)) + log2f(min));
685			}
686
687		✗	static float get_hz(const float bin, const float bmax,
688			const float min, const float max,
689			int fscale)
690			{
691		✗	switch (fscale) {
692		✗	case F_LINEAR:
693		✗	return min + (bin / bmax) * (max - min);
694		✗	case F_LOG:
695		✗	return min + log_scale(bin, 0, bmax, 20.f, max - min);
696		✗	default:
697		✗	return 0.f;
698			}
699			}
700
701		✗	static float inv_log_scale(float bin,
702			float bmin, float bmax,
703			float min, float max)
704			{
705		✗	return (min * exp2f((bin * (log2f(max) - log2f(20.f))) / bmax) + min) * bmax / max;
706			}
707
708		✗	static float bin_pos(const int bin, const int num_bins, const float min, const float max)
709			{
710		✗	return inv_log_scale(bin, 0.f, num_bins, 20.f, max - min);
711			}
712
713		✗	static float get_scale(AVFilterContext *ctx, int scale, float a)
714			{
715		✗	ShowSpectrumContext *s = ctx->priv;
716		✗	const float dmin = s->dmin;
717		✗	const float dmax = s->dmax;
718
719		✗	a = av_clipf(a, dmin, dmax);
720		✗	if (scale != LOG)
721		✗	a = (a - dmin) / (dmax - dmin);
722
723		✗	switch (scale) {
724		✗	case LINEAR:
725		✗	break;
726		✗	case SQRT:
727		✗	a = sqrtf(a);
728		✗	break;
729		✗	case CBRT:
730		✗	a = cbrtf(a);
731		✗	break;
732		✗	case FOURTHRT:
733		✗	a = sqrtf(sqrtf(a));
734		✗	break;
735		✗	case FIFTHRT:
736		✗	a = powf(a, 0.2f);
737		✗	break;
738		✗	case LOG:
739		✗	a = (s->drange - s->limit + log10f(a) * 20.f) / s->drange;
740		✗	break;
741		✗	default:
742		✗	av_assert0(0);
743			}
744
745		✗	return a;
746			}
747
748		✗	static float get_iscale(AVFilterContext *ctx, int scale, float a)
749			{
750		✗	ShowSpectrumContext *s = ctx->priv;
751		✗	const float dmin = s->dmin;
752		✗	const float dmax = s->dmax;
753
754		✗	switch (scale) {
755		✗	case LINEAR:
756		✗	break;
757		✗	case SQRT:
758		✗	a = a * a;
759		✗	break;
760		✗	case CBRT:
761		✗	a = a * a * a;
762		✗	break;
763		✗	case FOURTHRT:
764		✗	a = a * a * a * a;
765		✗	break;
766		✗	case FIFTHRT:
767		✗	a = a * a * a * a * a;
768		✗	break;
769		✗	case LOG:
770		✗	a = expf(M_LN10 * (a * s->drange - s->drange + s->limit) / 20.f);
771		✗	break;
772		✗	default:
773		✗	av_assert0(0);
774			}
775
776		✗	if (scale != LOG)
777		✗	a = a * (dmax - dmin) + dmin;
778
779		✗	return a;
780			}
781
782		✗	static int draw_legend(AVFilterContext *ctx, uint64_t samples)
783			{
784		✗	ShowSpectrumContext *s = ctx->priv;
785		✗	AVFilterLink *inlink = ctx->inputs[0];
786		✗	AVFilterLink *outlink = ctx->outputs[0];
787		✗	int ch, y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
788		✗	int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
789		✗	float spp = samples / (float)sz;
790			char *text;
791			uint8_t *dst;
792			char chlayout_str[128];
793
794		✗	av_channel_layout_describe(&inlink->ch_layout, chlayout_str, sizeof(chlayout_str));
795
796		✗	text = av_asprintf("%d Hz | %s", inlink->sample_rate, chlayout_str);
797		✗	if (!text)
798		✗	return AVERROR(ENOMEM);
799
800		✗	drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
801		✗	drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, outlink->h - 10, text, 0);
802		✗	av_freep(&text);
803		✗	if (s->stop) {
804		✗	text = av_asprintf("Zoom: %d Hz - %d Hz", s->start, s->stop);
805		✗	if (!text)
806		✗	return AVERROR(ENOMEM);
807		✗	drawtext(s->outpicref, outlink->w - 2 - strlen(text) * 10, 3, text, 0);
808		✗	av_freep(&text);
809			}
810
811		✗	dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
812		✗	for (x = 0; x < s->w + 1; x++)
813		✗	dst[x] = 200;
814		✗	dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
815		✗	for (x = 0; x < s->w + 1; x++)
816		✗	dst[x] = 200;
817		✗	for (y = 0; y < s->h + 2; y++) {
818		✗	dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
819		✗	dst[s->start_x - 1] = 200;
820		✗	dst[s->start_x + s->w] = 200;
821			}
822		✗	if (s->orientation == VERTICAL) {
823		✗	int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
824		✗	int hh = s->mode == SEPARATE ? -(s->h % s->nb_display_channels) + 1 : 1;
825		✗	for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
826		✗	for (y = 0; y < h; y += 20) {
827		✗	dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
828		✗	dst[s->start_x - 2] = 200;
829		✗	dst[s->start_x + s->w + 1] = 200;
830			}
831		✗	for (y = 0; y < h; y += 40) {
832		✗	dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - hh) * s->outpicref->linesize[0];
833		✗	dst[s->start_x - 3] = 200;
834		✗	dst[s->start_x + s->w + 2] = 200;
835			}
836		✗	dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
837		✗	for (x = 0; x < s->w; x+=40)
838		✗	dst[x] = 200;
839		✗	dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
840		✗	for (x = 0; x < s->w; x+=80)
841		✗	dst[x] = 200;
842		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
843		✗	for (x = 0; x < s->w; x+=40) {
844		✗	dst[x] = 200;
845			}
846		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
847		✗	for (x = 0; x < s->w; x+=80) {
848		✗	dst[x] = 200;
849			}
850		✗	for (y = 0; y < h; y += 40) {
851		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
852		✗	float hertz = get_hz(y, h, s->start, s->start + range, s->fscale);
853			char *units;
854
855		✗	if (hertz == 0)
856		✗	units = av_asprintf("DC");
857			else
858		✗	units = av_asprintf("%.2f", hertz);
859		✗	if (!units)
860		✗	return AVERROR(ENOMEM);
861
862		✗	drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4 - hh, units, 0);
863		✗	av_free(units);
864			}
865			}
866
867		✗	for (x = 0; x < s->w && s->single_pic; x+=80) {
868		✗	float seconds = x * spp / inlink->sample_rate;
869		✗	char *units = get_time(ctx, seconds, x);
870		✗	if (!units)
871		✗	return AVERROR(ENOMEM);
872
873		✗	drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->h + s->start_y + 6, units, 0);
874		✗	drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->start_y - 12, units, 0);
875		✗	av_free(units);
876			}
877
878		✗	drawtext(s->outpicref, outlink->w / 2 - 4 * 4, outlink->h - s->start_y / 2, "TIME", 0);
879		✗	drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 14 * 4, "FREQUENCY (Hz)", 1);
880			} else {
881		✗	int w = s->mode == SEPARATE ? s->w / s->nb_display_channels : s->w;
882		✗	for (y = 0; y < s->h; y += 20) {
883		✗	dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
884		✗	dst[s->start_x - 2] = 200;
885		✗	dst[s->start_x + s->w + 1] = 200;
886			}
887		✗	for (y = 0; y < s->h; y += 40) {
888		✗	dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
889		✗	dst[s->start_x - 3] = 200;
890		✗	dst[s->start_x + s->w + 2] = 200;
891			}
892		✗	for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
893		✗	dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
894		✗	for (x = 0; x < w; x+=40)
895		✗	dst[x] = 200;
896		✗	dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x + w * ch;
897		✗	for (x = 0; x < w; x+=80)
898		✗	dst[x] = 200;
899		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x + w * ch;
900		✗	for (x = 0; x < w; x+=40) {
901		✗	dst[x] = 200;
902			}
903		✗	dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
904		✗	for (x = 0; x < w; x+=80) {
905		✗	dst[x] = 200;
906			}
907		✗	for (x = 0; x < w - 79; x += 80) {
908		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
909		✗	float hertz = get_hz(x, w, s->start, s->start + range, s->fscale);
910			char *units;
911
912		✗	if (hertz == 0)
913		✗	units = av_asprintf("DC");
914			else
915		✗	units = av_asprintf("%.2f", hertz);
916		✗	if (!units)
917		✗	return AVERROR(ENOMEM);
918
919		✗	drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->start_y - 12, units, 0);
920		✗	drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->h + s->start_y + 6, units, 0);
921		✗	av_free(units);
922			}
923			}
924		✗	for (y = 0; y < s->h && s->single_pic; y+=40) {
925		✗	float seconds = y * spp / inlink->sample_rate;
926		✗	char *units = get_time(ctx, seconds, x);
927		✗	if (!units)
928		✗	return AVERROR(ENOMEM);
929
930		✗	drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, s->start_y + y - 4, units, 0);
931		✗	av_free(units);
932			}
933		✗	drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 4 * 4, "TIME", 1);
934		✗	drawtext(s->outpicref, outlink->w / 2 - 14 * 4, outlink->h - s->start_y / 2, "FREQUENCY (Hz)", 0);
935			}
936
937		✗	for (ch = 0; ch < (multi ? s->nb_display_channels : 1); ch++) {
938		✗	int h = multi ? s->h / s->nb_display_channels : s->h;
939
940		✗	for (y = 0; y < h; y++) {
941		✗	float out[4] = { 0., 127.5, 127.5, 0.f};
942			int chn;
943
944		✗	for (chn = 0; chn < (s->mode == SEPARATE ? 1 : s->nb_display_channels); chn++) {
945			float yf, uf, vf;
946		✗	int channel = (multi) ? s->nb_display_channels - ch - 1 : chn;
947			float lout[4];
948
949		✗	color_range(s, channel, &yf, &uf, &vf);
950		✗	pick_color(s, yf, uf, vf, y / (float)h, lout);
951		✗	out[0] += lout[0];
952		✗	out[1] += lout[1];
953		✗	out[2] += lout[2];
954		✗	out[3] += lout[3];
955			}
956		✗	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);
957		✗	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);
958		✗	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);
959		✗	if (s->outpicref->data[3])
960		✗	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);
961			}
962
963		✗	for (y = 0; ch == 0 && y < h + 5; y += 25) {
964			static const char *log_fmt = "%.0f";
965			static const char *lin_fmt = "%.3f";
966		✗	const float a = av_clipf(1.f - y / (float)(h - 1), 0.f, 1.f);
967		✗	const float value = s->scale == LOG ? log10f(get_iscale(ctx, s->scale, a)) * 20.f : get_iscale(ctx, s->scale, a);
968			char *text;
969
970		✗	text = av_asprintf(s->scale == LOG ? log_fmt : lin_fmt, value);
971		✗	if (!text)
972		✗	continue;
973		✗	drawtext(s->outpicref, s->w + s->start_x + 35, s->start_y + y - 3, text, 0);
974		✗	av_free(text);
975			}
976			}
977
978		✗	if (s->scale == LOG)
979		✗	drawtext(s->outpicref, s->w + s->start_x + 22, s->start_y + s->h + 20, "dBFS", 0);
980
981		✗	return 0;
982			}
983
984		✗	static float get_value(AVFilterContext *ctx, int ch, int y)
985			{
986		✗	ShowSpectrumContext *s = ctx->priv;
987		✗	float *magnitudes = s->magnitudes[ch];
988		✗	float *phases = s->phases[ch];
989			float a;
990
991		✗	switch (s->data) {
992		✗	case D_MAGNITUDE:
993			/* get magnitude */
994		✗	a = magnitudes[y];
995		✗	break;
996		✗	case D_UPHASE:
997			case D_PHASE:
998			/* get phase */
999		✗	a = phases[y];
1000		✗	break;
1001		✗	default:
1002		✗	av_assert0(0);
1003			}
1004
1005		✗	return av_clipf(get_scale(ctx, s->scale, a), 0.f, 1.f);
1006			}
1007
1008		✗	static int plot_channel_lin(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1009			{
1010		✗	ShowSpectrumContext *s = ctx->priv;
1011		✗	const int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
1012		✗	const int ch = jobnr;
1013			float yf, uf, vf;
1014			int y;
1015
1016			/* decide color range */
1017		✗	color_range(s, ch, &yf, &uf, &vf);
1018
1019			/* draw the channel */
1020		✗	for (y = 0; y < h; y++) {
1021		✗	int row = (s->mode == COMBINED) ? y : ch * h + y;
1022		✗	float *out = &s->color_buffer[ch][4 * row];
1023		✗	float a = get_value(ctx, ch, y);
1024
1025		✗	pick_color(s, yf, uf, vf, a, out);
1026			}
1027
1028		✗	return 0;
1029			}
1030
1031		✗	static int plot_channel_log(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1032			{
1033		✗	ShowSpectrumContext *s = ctx->priv;
1034		✗	AVFilterLink *inlink = ctx->inputs[0];
1035		✗	const int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
1036		✗	const int ch = jobnr;
1037			float yf, uf, vf;
1038
1039			/* decide color range */
1040		✗	color_range(s, ch, &yf, &uf, &vf);
1041
1042			/* draw the channel */
1043		✗	for (int yy = 0; yy < h; yy++) {
1044		✗	float range = s->stop ? s->stop - s->start : inlink->sample_rate / 2;
1045		✗	float pos = bin_pos(yy, h, s->start, s->start + range);
1046		✗	float delta = pos - floorf(pos);
1047			float a0, a1;
1048
1049		✗	a0 = get_value(ctx, ch, av_clip(pos, 0, h-1));
1050		✗	a1 = get_value(ctx, ch, av_clip(pos+1, 0, h-1));
1051			{
1052		✗	int row = (s->mode == COMBINED) ? yy : ch * h + yy;
1053		✗	float *out = &s->color_buffer[ch][4 * row];
1054
1055		✗	pick_color(s, yf, uf, vf, delta * a1 + (1.f - delta) * a0, out);
1056			}
1057			}
1058
1059		✗	return 0;
1060			}
1061
1062		✗	static int config_output(AVFilterLink *outlink)
1063			{
1064		✗	AVFilterContext *ctx = outlink->src;
1065		✗	AVFilterLink *inlink = ctx->inputs[0];
1066		✗	ShowSpectrumContext *s = ctx->priv;
1067			int i, fft_size, h, w, ret;
1068			float overlap;
1069
1070		✗	s->old_pts = AV_NOPTS_VALUE;
1071		✗	s->dmax = expf(s->limit * M_LN10 / 20.f);
1072		✗	s->dmin = expf((s->limit - s->drange) * M_LN10 / 20.f);
1073
1074		✗	switch (s->fscale) {
1075		✗	case F_LINEAR: s->plot_channel = plot_channel_lin; break;
1076		✗	case F_LOG: s->plot_channel = plot_channel_log; break;
1077		✗	default: return AVERROR_BUG;
1078			}
1079
1080		✗	s->stop = FFMIN(s->stop, inlink->sample_rate / 2);
1081		✗	if ((s->stop || s->start) && s->stop <= s->start) {
1082		✗	av_log(ctx, AV_LOG_ERROR, "Stop frequency should be greater than start.\n");
1083		✗	return AVERROR(EINVAL);
1084			}
1085
1086		✗	if (!strcmp(ctx->filter->name, "showspectrumpic"))
1087		✗	s->single_pic = 1;
1088
1089		✗	outlink->w = s->w;
1090		✗	outlink->h = s->h;
1091		✗	outlink->sample_aspect_ratio = (AVRational){1,1};
1092
1093		✗	if (s->legend) {
1094		✗	s->start_x = (log10(inlink->sample_rate) + 1) * 25;
1095		✗	s->start_y = 64;
1096		✗	outlink->w += s->start_x * 2;
1097		✗	outlink->h += s->start_y * 2;
1098			}
1099
1100		✗	h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->ch_layout.nb_channels;
1101		✗	w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->ch_layout.nb_channels;
1102		✗	s->channel_height = h;
1103		✗	s->channel_width = w;
1104
1105		✗	if (s->orientation == VERTICAL) {
1106			/* FFT window size (precision) according to the requested output frame height */
1107		✗	fft_size = h * 2;
1108			} else {
1109			/* FFT window size (precision) according to the requested output frame width */
1110		✗	fft_size = w * 2;
1111			}
1112
1113		✗	s->win_size = fft_size;
1114		✗	s->buf_size = FFALIGN(s->win_size << (!!s->stop), av_cpu_max_align());
1115
1116		✗	if (!s->fft) {
1117		✗	s->fft = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->fft));
1118		✗	if (!s->fft)
1119		✗	return AVERROR(ENOMEM);
1120			}
1121
1122		✗	if (s->stop) {
1123		✗	if (!s->ifft) {
1124		✗	s->ifft = av_calloc(inlink->ch_layout.nb_channels, sizeof(*s->ifft));
1125		✗	if (!s->ifft)
1126		✗	return AVERROR(ENOMEM);
1127			}
1128			}
1129
1130			/* (re-)configuration if the video output changed (or first init) */
1131		✗	if (fft_size != s->fft_size) {
1132			AVFrame *outpicref;
1133
1134		✗	s->fft_size = fft_size;
1135
1136			/* FFT buffers: x2 for each (display) channel buffer.
1137			* Note: we use free and malloc instead of a realloc-like function to
1138			* make sure the buffer is aligned in memory for the FFT functions. */
1139		✗	for (i = 0; i < s->nb_display_channels; i++) {
1140		✗	if (s->stop) {
1141		✗	av_tx_uninit(&s->ifft[i]);
1142		✗	av_freep(&s->fft_scratch[i]);
1143			}
1144		✗	av_tx_uninit(&s->fft[i]);
1145		✗	av_freep(&s->fft_in[i]);
1146		✗	av_freep(&s->fft_data[i]);
1147			}
1148		✗	av_freep(&s->fft_data);
1149
1150		✗	s->nb_display_channels = inlink->ch_layout.nb_channels;
1151		✗	for (i = 0; i < s->nb_display_channels; i++) {
1152		✗	float scale = 1.f;
1153
1154		✗	ret = av_tx_init(&s->fft[i], &s->tx_fn, AV_TX_FLOAT_FFT, 0, fft_size << (!!s->stop), &scale, 0);
1155		✗	if (s->stop) {
1156		✗	ret = av_tx_init(&s->ifft[i], &s->itx_fn, AV_TX_FLOAT_FFT, 1, fft_size << (!!s->stop), &scale, 0);
1157		✗	if (ret < 0) {
1158		✗	av_log(ctx, AV_LOG_ERROR, "Unable to create Inverse FFT context. "
1159			"The window size might be too high.\n");
1160		✗	return ret;
1161			}
1162			}
1163		✗	if (ret < 0) {
1164		✗	av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
1165			"The window size might be too high.\n");
1166		✗	return ret;
1167			}
1168			}
1169
1170		✗	s->magnitudes = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes));
1171		✗	if (!s->magnitudes)
1172		✗	return AVERROR(ENOMEM);
1173		✗	for (i = 0; i < s->nb_display_channels; i++) {
1174		✗	s->magnitudes[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->magnitudes));
1175		✗	if (!s->magnitudes[i])
1176		✗	return AVERROR(ENOMEM);
1177			}
1178
1179		✗	s->phases = av_calloc(s->nb_display_channels, sizeof(*s->phases));
1180		✗	if (!s->phases)
1181		✗	return AVERROR(ENOMEM);
1182		✗	for (i = 0; i < s->nb_display_channels; i++) {
1183		✗	s->phases[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->phases));
1184		✗	if (!s->phases[i])
1185		✗	return AVERROR(ENOMEM);
1186			}
1187
1188		✗	av_freep(&s->color_buffer);
1189		✗	s->color_buffer = av_calloc(s->nb_display_channels, sizeof(*s->color_buffer));
1190		✗	if (!s->color_buffer)
1191		✗	return AVERROR(ENOMEM);
1192		✗	for (i = 0; i < s->nb_display_channels; i++) {
1193		✗	s->color_buffer[i] = av_calloc(s->orientation == VERTICAL ? s->h * 4 : s->w * 4, sizeof(**s->color_buffer));
1194		✗	if (!s->color_buffer[i])
1195		✗	return AVERROR(ENOMEM);
1196			}
1197
1198		✗	s->fft_in = av_calloc(s->nb_display_channels, sizeof(*s->fft_in));
1199		✗	if (!s->fft_in)
1200		✗	return AVERROR(ENOMEM);
1201		✗	s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data));
1202		✗	if (!s->fft_data)
1203		✗	return AVERROR(ENOMEM);
1204		✗	s->fft_scratch = av_calloc(s->nb_display_channels, sizeof(*s->fft_scratch));
1205		✗	if (!s->fft_scratch)
1206		✗	return AVERROR(ENOMEM);
1207		✗	for (i = 0; i < s->nb_display_channels; i++) {
1208		✗	s->fft_in[i] = av_calloc(s->buf_size, sizeof(**s->fft_in));
1209		✗	if (!s->fft_in[i])
1210		✗	return AVERROR(ENOMEM);
1211
1212		✗	s->fft_data[i] = av_calloc(s->buf_size, sizeof(**s->fft_data));
1213		✗	if (!s->fft_data[i])
1214		✗	return AVERROR(ENOMEM);
1215
1216		✗	s->fft_scratch[i] = av_calloc(s->buf_size, sizeof(**s->fft_scratch));
1217		✗	if (!s->fft_scratch[i])
1218		✗	return AVERROR(ENOMEM);
1219			}
1220
1221			/* pre-calc windowing function */
1222		✗	s->window_func_lut =
1223		✗	av_realloc_f(s->window_func_lut, s->win_size,
1224			sizeof(*s->window_func_lut));
1225		✗	if (!s->window_func_lut)
1226		✗	return AVERROR(ENOMEM);
1227		✗	generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
1228		✗	if (s->overlap == 1)
1229		✗	s->overlap = overlap;
1230		✗	s->hop_size = (1.f - s->overlap) * s->win_size;
1231		✗	if (s->hop_size < 1) {
1232		✗	av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
1233		✗	return AVERROR(EINVAL);
1234			}
1235
1236		✗	for (s->win_scale = 0, i = 0; i < s->win_size; i++) {
1237		✗	s->win_scale += s->window_func_lut[i] * s->window_func_lut[i];
1238			}
1239		✗	s->win_scale = 1.f / sqrtf(s->win_scale);
1240
1241			/* prepare the initial picref buffer (black frame) */
1242		✗	av_frame_free(&s->outpicref);
1243		✗	s->outpicref = outpicref =
1244		✗	ff_get_video_buffer(outlink, outlink->w, outlink->h);
1245		✗	if (!outpicref)
1246		✗	return AVERROR(ENOMEM);
1247		✗	outpicref->sample_aspect_ratio = (AVRational){1,1};
1248		✗	for (i = 0; i < outlink->h; i++) {
1249		✗	memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
1250		✗	memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
1251		✗	memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
1252		✗	if (outpicref->data[3])
1253		✗	memset(outpicref->data[3] + i * outpicref->linesize[3], 0, outlink->w);
1254			}
1255		✗	outpicref->color_range = AVCOL_RANGE_JPEG;
1256
1257		✗	if (!s->single_pic && s->legend)
1258		✗	draw_legend(ctx, 0);
1259			}
1260
1261		✗	if ((s->orientation == VERTICAL && s->xpos >= s->w) ||
1262		✗	(s->orientation == HORIZONTAL && s->xpos >= s->h))
1263		✗	s->xpos = 0;
1264
1265		✗	if (s->sliding == LREPLACE) {
1266		✗	if (s->orientation == VERTICAL)
1267		✗	s->xpos = s->w - 1;
1268		✗	if (s->orientation == HORIZONTAL)
1269		✗	s->xpos = s->h - 1;
1270			}
1271
1272		✗	s->auto_frame_rate = av_make_q(inlink->sample_rate, s->hop_size);
1273		✗	if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
1274		✗	s->auto_frame_rate = av_mul_q(s->auto_frame_rate, av_make_q(1, s->w));
1275		✗	if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
1276		✗	s->auto_frame_rate = av_mul_q(s->auto_frame_rate, av_make_q(1, s->h));
1277		✗	if (!s->single_pic && strcmp(s->rate_str, "auto")) {
1278		✗	int ret = av_parse_video_rate(&s->frame_rate, s->rate_str);
1279		✗	if (ret < 0)
1280		✗	return ret;
1281		✗	} else if (s->single_pic) {
1282		✗	s->frame_rate = av_make_q(1, 1);
1283			} else {
1284		✗	s->frame_rate = s->auto_frame_rate;
1285			}
1286		✗	outlink->frame_rate = s->frame_rate;
1287		✗	outlink->time_base = av_inv_q(outlink->frame_rate);
1288
1289		✗	if (s->orientation == VERTICAL) {
1290		✗	s->combine_buffer =
1291		✗	av_realloc_f(s->combine_buffer, s->h * 4,
1292			sizeof(*s->combine_buffer));
1293			} else {
1294		✗	s->combine_buffer =
1295		✗	av_realloc_f(s->combine_buffer, s->w * 4,
1296			sizeof(*s->combine_buffer));
1297			}
1298		✗	if (!s->combine_buffer)
1299		✗	return AVERROR(ENOMEM);
1300
1301		✗	av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d FFT window size:%d\n",
1302			s->w, s->h, s->win_size);
1303
1304		✗	s->in_frame = ff_get_audio_buffer(inlink, s->win_size);
1305		✗	if (!s->in_frame)
1306		✗	return AVERROR(ENOMEM);
1307
1308		✗	s->frames = av_fast_realloc(NULL, &s->frames_size,
1309			DEFAULT_LENGTH * sizeof(*(s->frames)));
1310		✗	if (!s->frames)
1311		✗	return AVERROR(ENOMEM);
1312
1313		✗	return 0;
1314			}
1315
1316			#define RE(y, ch) s->fft_data[ch][y].re
1317			#define IM(y, ch) s->fft_data[ch][y].im
1318			#define MAGNITUDE(y, ch) hypotf(RE(y, ch), IM(y, ch))
1319			#define PHASE(y, ch) atan2f(IM(y, ch), RE(y, ch))
1320
1321		✗	static int calc_channel_magnitudes(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1322			{
1323		✗	ShowSpectrumContext *s = ctx->priv;
1324		✗	const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
1325		✗	int y, h = s->orientation == VERTICAL ? s->h : s->w;
1326		✗	const float f = s->gain * w;
1327		✗	const int ch = jobnr;
1328		✗	float *magnitudes = s->magnitudes[ch];
1329
1330		✗	for (y = 0; y < h; y++)
1331		✗	magnitudes[y] = MAGNITUDE(y, ch) * f;
1332
1333		✗	return 0;
1334			}
1335
1336		✗	static int calc_channel_phases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1337			{
1338		✗	ShowSpectrumContext *s = ctx->priv;
1339		✗	const int h = s->orientation == VERTICAL ? s->h : s->w;
1340		✗	const int ch = jobnr;
1341		✗	float *phases = s->phases[ch];
1342			int y;
1343
1344		✗	for (y = 0; y < h; y++)
1345		✗	phases[y] = (PHASE(y, ch) / M_PI + 1) / 2;
1346
1347		✗	return 0;
1348			}
1349
1350		✗	static void unwrap(float *x, int N, float tol, float *mi, float *ma)
1351			{
1352		✗	const float rng = 2.f * M_PI;
1353		✗	float prev_p = 0.f;
1354		✗	float max = -FLT_MAX;
1355		✗	float min = FLT_MAX;
1356
1357		✗	for (int i = 0; i < N; i++) {
1358		✗	const float d = x[FFMIN(i + 1, N)] - x[i];
1359		✗	const float p = ceilf(fabsf(d) / rng) * rng * (((d < tol) > 0.f) - ((d > -tol) > 0.f));
1360
1361		✗	x[i] += p + prev_p;
1362		✗	prev_p += p;
1363		✗	max = fmaxf(x[i], max);
1364		✗	min = fminf(x[i], min);
1365			}
1366
1367		✗	*mi = min;
1368		✗	*ma = max;
1369		✗	}
1370
1371		✗	static int calc_channel_uphases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
1372			{
1373		✗	ShowSpectrumContext *s = ctx->priv;
1374		✗	const int h = s->orientation == VERTICAL ? s->h : s->w;
1375		✗	const int ch = jobnr;
1376		✗	float *phases = s->phases[ch];
1377			float min, max, scale;
1378			int y;
1379
1380		✗	for (y = 0; y < h; y++)
1381		✗	phases[y] = PHASE(y, ch);
1382		✗	unwrap(phases, h, M_PI, &min, &max);
1383		✗	scale = 1.f / (max - min + FLT_MIN);
1384		✗	for (y = 0; y < h; y++)
1385		✗	phases[y] = fabsf((phases[y] - min) * scale);
1386
1387		✗	return 0;
1388			}
1389
1390		✗	static void acalc_magnitudes(ShowSpectrumContext *s)
1391			{
1392		✗	const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
1393		✗	int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
1394		✗	const float f = s->gain * 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] += MAGNITUDE(y, ch) * f;
1401			}
1402		✗	}
1403
1404		✗	static void scale_magnitudes(ShowSpectrumContext *s, float scale)
1405			{
1406		✗	int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
1407
1408		✗	for (ch = 0; ch < s->nb_display_channels; ch++) {
1409		✗	float *magnitudes = s->magnitudes[ch];
1410
1411		✗	for (y = 0; y < h; y++)
1412		✗	magnitudes[y] *= scale;
1413			}
1414		✗	}
1415
1416		✗	static void clear_combine_buffer(ShowSpectrumContext *s, int size)
1417			{
1418			int y;
1419
1420		✗	for (y = 0; y < size; y++) {
1421		✗	s->combine_buffer[4 * y ] = 0;
1422		✗	s->combine_buffer[4 * y + 1] = 127.5;
1423		✗	s->combine_buffer[4 * y + 2] = 127.5;
1424		✗	s->combine_buffer[4 * y + 3] = 0;
1425			}
1426		✗	}
1427
1428		✗	static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
1429			{
1430		✗	AVFilterContext *ctx = inlink->dst;
1431		✗	AVFilterLink *outlink = ctx->outputs[0];
1432		✗	ShowSpectrumContext *s = ctx->priv;
1433		✗	AVFrame *outpicref = s->outpicref;
1434		✗	int ret, plane, x, y, z = s->orientation == VERTICAL ? s->h : s->w;
1435		✗	const int alpha = outpicref->data[3] != NULL;
1436
1437			/* fill a new spectrum column */
1438			/* initialize buffer for combining to black */
1439		✗	clear_combine_buffer(s, z);
1440
1441		✗	ff_filter_execute(ctx, s->plot_channel, NULL, NULL, s->nb_display_channels);
1442
1443		✗	for (y = 0; y < z * 4; y++) {
1444		✗	for (x = 0; x < s->nb_display_channels; x++) {
1445		✗	s->combine_buffer[y] += s->color_buffer[x][y];
1446			}
1447			}
1448
1449		✗	ret = ff_inlink_make_frame_writable(outlink, &s->outpicref);
1450		✗	if (ret < 0)
1451		✗	return ret;
1452		✗	outpicref = s->outpicref;
1453			/* copy to output */
1454		✗	if (s->orientation == VERTICAL) {
1455		✗	if (s->sliding == SCROLL) {
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, p + 1, s->w - 1);
1461			}
1462			}
1463		✗	s->xpos = s->w - 1;
1464		✗	} else if (s->sliding == RSCROLL) {
1465		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1466		✗	for (y = 0; y < s->h; y++) {
1467		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1468		✗	(y + s->start_y) * outpicref->linesize[plane];
1469		✗	memmove(p + 1, p, s->w - 1);
1470			}
1471			}
1472		✗	s->xpos = 0;
1473			}
1474		✗	for (plane = 0; plane < 3; plane++) {
1475		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1476		✗	(outlink->h - 1 - s->start_y) * outpicref->linesize[plane] +
1477		✗	s->xpos;
1478		✗	for (y = 0; y < s->h; y++) {
1479		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * y + plane], 0, 255));
1480		✗	p -= outpicref->linesize[plane];
1481			}
1482			}
1483		✗	if (alpha) {
1484		✗	uint8_t *p = outpicref->data[3] + s->start_x +
1485		✗	(outlink->h - 1 - s->start_y) * outpicref->linesize[3] +
1486		✗	s->xpos;
1487		✗	for (y = 0; y < s->h; y++) {
1488		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * y + 3], 0, 255));
1489		✗	p -= outpicref->linesize[3];
1490			}
1491			}
1492			} else {
1493		✗	if (s->sliding == SCROLL) {
1494		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1495		✗	for (y = 1; y < s->h; y++) {
1496		✗	memmove(outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
1497		✗	outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
1498		✗	s->w);
1499			}
1500			}
1501		✗	s->xpos = s->h - 1;
1502		✗	} else if (s->sliding == RSCROLL) {
1503		✗	for (plane = 0; plane < 3 + alpha; plane++) {
1504		✗	for (y = s->h - 1; y >= 1; y--) {
1505		✗	memmove(outpicref->data[plane] + (y + s->start_y) * outpicref->linesize[plane] + s->start_x,
1506		✗	outpicref->data[plane] + (y-1 + s->start_y) * outpicref->linesize[plane] + s->start_x,
1507		✗	s->w);
1508			}
1509			}
1510		✗	s->xpos = 0;
1511			}
1512		✗	for (plane = 0; plane < 3; plane++) {
1513		✗	uint8_t *p = outpicref->data[plane] + s->start_x +
1514		✗	(s->xpos + s->start_y) * outpicref->linesize[plane];
1515		✗	for (x = 0; x < s->w; x++) {
1516		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * x + plane], 0, 255));
1517		✗	p++;
1518			}
1519			}
1520		✗	if (alpha) {
1521		✗	uint8_t *p = outpicref->data[3] + s->start_x +
1522		✗	(s->xpos + s->start_y) * outpicref->linesize[3];
1523		✗	for (x = 0; x < s->w; x++) {
1524		✗	*p = lrintf(av_clipf(s->combine_buffer[4 * x + 3], 0, 255));
1525		✗	p++;
1526			}
1527			}
1528			}
1529
1530		✗	if (s->sliding != FULLFRAME || s->xpos == 0)
1531		✗	s->pts = outpicref->pts = av_rescale_q(s->in_pts, inlink->time_base, outlink->time_base);
1532
1533		✗	if (s->sliding == LREPLACE) {
1534		✗	s->xpos--;
1535		✗	if (s->orientation == VERTICAL && s->xpos < 0)
1536		✗	s->xpos = s->w - 1;
1537		✗	if (s->orientation == HORIZONTAL && s->xpos < 0)
1538		✗	s->xpos = s->h - 1;
1539			} else {
1540		✗	s->xpos++;
1541		✗	if (s->orientation == VERTICAL && s->xpos >= s->w)
1542		✗	s->xpos = 0;
1543		✗	if (s->orientation == HORIZONTAL && s->xpos >= s->h)
1544		✗	s->xpos = 0;
1545			}
1546
1547		✗	if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
1548		✗	if (s->old_pts < outpicref->pts || s->sliding == FULLFRAME ||
1549		✗	(s->eof && ff_inlink_queued_samples(inlink) <= s->hop_size)) {
1550			AVFrame *clone;
1551
1552		✗	if (s->legend) {
1553		✗	char *units = get_time(ctx, insamples->pts /(float)inlink->sample_rate, x);
1554		✗	if (!units)
1555		✗	return AVERROR(ENOMEM);
1556
1557		✗	if (s->orientation == VERTICAL) {
1558		✗	for (y = 0; y < 10; y++) {
1559		✗	memset(s->outpicref->data[0] + outlink->w / 2 - 4 * s->old_len +
1560		✗	(outlink->h - s->start_y / 2 - 20 + y) * s->outpicref->linesize[0], 0, 10 * s->old_len);
1561			}
1562		✗	drawtext(s->outpicref,
1563		✗	outlink->w / 2 - 4 * strlen(units),
1564		✗	outlink->h - s->start_y / 2 - 20,
1565			units, 0);
1566			} else {
1567		✗	for (y = 0; y < 10 * s->old_len; y++) {
1568		✗	memset(s->outpicref->data[0] + s->start_x / 7 + 20 +
1569		✗	(outlink->h / 2 - 4 * s->old_len + y) * s->outpicref->linesize[0], 0, 10);
1570			}
1571		✗	drawtext(s->outpicref,
1572		✗	s->start_x / 7 + 20,
1573		✗	outlink->h / 2 - 4 * strlen(units),
1574			units, 1);
1575			}
1576		✗	s->old_len = strlen(units);
1577		✗	av_free(units);
1578			}
1579		✗	s->old_pts = outpicref->pts;
1580		✗	clone = av_frame_clone(s->outpicref);
1581		✗	if (!clone)
1582		✗	return AVERROR(ENOMEM);
1583		✗	ret = ff_filter_frame(outlink, clone);
1584		✗	if (ret < 0)
1585		✗	return ret;
1586		✗	return 0;
1587			}
1588			}
1589
1590		✗	return 1;
1591			}
1592
1593			#if CONFIG_SHOWSPECTRUM_FILTER
1594
1595		✗	static int activate(AVFilterContext *ctx)
1596			{
1597		✗	AVFilterLink *inlink = ctx->inputs[0];
1598		✗	AVFilterLink *outlink = ctx->outputs[0];
1599		✗	ShowSpectrumContext *s = ctx->priv;
1600			int ret, status;
1601			int64_t pts;
1602
1603		✗	FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
1604
1605		✗	if (s->outpicref && ff_inlink_queued_samples(inlink) > 0) {
1606			AVFrame *fin;
1607
1608		✗	ret = ff_inlink_consume_samples(inlink, s->hop_size, s->hop_size, &fin);
1609		✗	if (ret < 0)
1610		✗	return ret;
1611		✗	if (ret > 0) {
1612		✗	ff_filter_execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
1613
1614		✗	if (s->data == D_MAGNITUDE)
1615		✗	ff_filter_execute(ctx, calc_channel_magnitudes, NULL, NULL, s->nb_display_channels);
1616
1617		✗	if (s->data == D_PHASE)
1618		✗	ff_filter_execute(ctx, calc_channel_phases, NULL, NULL, s->nb_display_channels);
1619
1620		✗	if (s->data == D_UPHASE)
1621		✗	ff_filter_execute(ctx, calc_channel_uphases, NULL, NULL, s->nb_display_channels);
1622
1623		✗	if (s->sliding != FULLFRAME || s->xpos == 0)
1624		✗	s->in_pts = fin->pts;
1625		✗	ret = plot_spectrum_column(inlink, fin);
1626		✗	av_frame_free(&fin);
1627		✗	if (ret <= 0)
1628		✗	return ret;
1629			}
1630			}
1631
1632		✗	if (s->eof && s->sliding == FULLFRAME &&
1633		✗	s->xpos > 0 && s->outpicref) {
1634
1635		✗	if (s->orientation == VERTICAL) {
1636		✗	for (int i = 0; i < outlink->h; i++) {
1637		✗	memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos);
1638		✗	memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos);
1639		✗	memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos);
1640		✗	if (s->outpicref->data[3])
1641		✗	memset(s->outpicref->data[3] + i * s->outpicref->linesize[3] + s->xpos, 0, outlink->w - s->xpos);
1642			}
1643			} else {
1644		✗	for (int i = s->xpos; i < outlink->h; i++) {
1645		✗	memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w);
1646		✗	memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w);
1647		✗	memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w);
1648		✗	if (s->outpicref->data[3])
1649		✗	memset(s->outpicref->data[3] + i * s->outpicref->linesize[3], 0, outlink->w);
1650			}
1651			}
1652		✗	s->outpicref->pts = av_rescale_q(s->in_pts, inlink->time_base, outlink->time_base);
1653		✗	pts = s->outpicref->pts;
1654		✗	ret = ff_filter_frame(outlink, s->outpicref);
1655		✗	s->outpicref = NULL;
1656		✗	ff_outlink_set_status(outlink, AVERROR_EOF, pts);
1657		✗	return 0;
1658			}
1659
1660		✗	if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
1661		✗	s->eof = status == AVERROR_EOF;
1662		✗	ff_filter_set_ready(ctx, 100);
1663		✗	return 0;
1664			}
1665
1666		✗	if (s->eof) {
1667		✗	ff_outlink_set_status(outlink, AVERROR_EOF, s->pts);
1668		✗	return 0;
1669			}
1670
1671		✗	if (ff_inlink_queued_samples(inlink) >= s->hop_size) {
1672		✗	ff_filter_set_ready(ctx, 10);
1673		✗	return 0;
1674			}
1675
1676		✗	if (ff_outlink_frame_wanted(outlink)) {
1677		✗	ff_inlink_request_frame(inlink);
1678		✗	return 0;
1679			}
1680
1681		✗	return FFERROR_NOT_READY;
1682			}
1683
1684			static const AVFilterPad showspectrum_outputs[] = {
1685			{
1686			.name = "default",
1687			.type = AVMEDIA_TYPE_VIDEO,
1688			.config_props = config_output,
1689			},
1690			};
1691
1692			const AVFilter ff_avf_showspectrum = {
1693			.name = "showspectrum",
1694			.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output."),
1695			.uninit = uninit,
1696			.priv_size = sizeof(ShowSpectrumContext),
1697			FILTER_INPUTS(ff_audio_default_filterpad),
1698			FILTER_OUTPUTS(showspectrum_outputs),
1699			FILTER_QUERY_FUNC(query_formats),
1700			.activate = activate,
1701			.priv_class = &showspectrum_class,
1702			.flags = AVFILTER_FLAG_SLICE_THREADS,
1703			};
1704			#endif // CONFIG_SHOWSPECTRUM_FILTER
1705
1706			#if CONFIG_SHOWSPECTRUMPIC_FILTER
1707
1708			static const AVOption showspectrumpic_options[] = {
1709			{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
1710			{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
1711			{ "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_MODES-1, FLAGS, .unit = "mode" },
1712			{ "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, .unit = "mode" },
1713			{ "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, .unit = "mode" },
1714			{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=INTENSITY}, 0, NB_CLMODES-1, FLAGS, .unit = "color" },
1715			{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, .unit = "color" },
1716			{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, .unit = "color" },
1717			{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, .unit = "color" },
1718			{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, .unit = "color" },
1719			{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, .unit = "color" },
1720			{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, .unit = "color" },
1721			{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, .unit = "color" },
1722			{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, .unit = "color" },
1723			{ "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, .unit = "color" },
1724			{ "magma", "magma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MAGMA}, 0, 0, FLAGS, .unit = "color" },
1725			{ "green", "green based coloring", 0, AV_OPT_TYPE_CONST, {.i64=GREEN}, 0, 0, FLAGS, .unit = "color" },
1726			{ "viridis", "viridis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=VIRIDIS}, 0, 0, FLAGS, .unit = "color" },
1727			{ "plasma", "plasma based coloring", 0, AV_OPT_TYPE_CONST, {.i64=PLASMA}, 0, 0, FLAGS, .unit = "color" },
1728			{ "cividis", "cividis based coloring", 0, AV_OPT_TYPE_CONST, {.i64=CIVIDIS}, 0, 0, FLAGS, .unit = "color" },
1729			{ "terrain", "terrain based coloring", 0, AV_OPT_TYPE_CONST, {.i64=TERRAIN}, 0, 0, FLAGS, .unit = "color" },
1730			{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, .unit = "scale" },
1731			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, .unit = "scale" },
1732			{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, .unit = "scale" },
1733			{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, .unit = "scale" },
1734			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, .unit = "scale" },
1735			{ "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, .unit = "scale" },
1736			{ "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, .unit = "scale" },
1737			{ "fscale", "set frequency scale", OFFSET(fscale), AV_OPT_TYPE_INT, {.i64=F_LINEAR}, 0, NB_FSCALES-1, FLAGS, .unit = "fscale" },
1738			{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=F_LINEAR}, 0, 0, FLAGS, .unit = "fscale" },
1739			{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=F_LOG}, 0, 0, FLAGS, .unit = "fscale" },
1740			{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
1741			WIN_FUNC_OPTION("win_func", OFFSET(win_func), FLAGS, WFUNC_HANNING),
1742			{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, .unit = "orientation" },
1743			{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, .unit = "orientation" },
1744			{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, .unit = "orientation" },
1745			{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
1746			{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
1747			{ "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
1748			{ "start", "start frequency", OFFSET(start), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
1749			{ "stop", "stop frequency", OFFSET(stop), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT32_MAX, FLAGS },
1750			{ "drange", "set dynamic range in dBFS", OFFSET(drange), AV_OPT_TYPE_FLOAT, {.dbl = 120}, 10, 200, FLAGS },
1751			{ "limit", "set upper limit in dBFS", OFFSET(limit), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -100, 100, FLAGS },
1752			{ "opacity", "set opacity strength", OFFSET(opacity_factor), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 10, FLAGS },
1753			{ NULL }
1754			};
1755
1756			AVFILTER_DEFINE_CLASS(showspectrumpic);
1757
1758		✗	static int showspectrumpic_request_frame(AVFilterLink *outlink)
1759			{
1760		✗	AVFilterContext *ctx = outlink->src;
1761		✗	ShowSpectrumContext *s = ctx->priv;
1762		✗	AVFilterLink *inlink = ctx->inputs[0];
1763			int ret;
1764
1765		✗	ret = ff_request_frame(inlink);
1766		✗	if (ret == AVERROR_EOF && s->outpicref && s->samples > 0) {
1767		✗	int consumed = 0;
1768		✗	int x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
1769		✗	unsigned int nb_frame = 0;
1770			int ch, spf, spb;
1771		✗	int src_offset = 0;
1772			AVFrame *fin;
1773
1774		✗	spf = s->win_size * (s->samples / ((s->win_size * sz) * ceil(s->samples / (float)(s->win_size * sz))));
1775		✗	spf = FFMAX(1, spf);
1776		✗	s->hop_size = spf;
1777
1778		✗	spb = (s->samples / (spf * sz)) * spf;
1779
1780		✗	fin = ff_get_audio_buffer(inlink, spf);
1781		✗	if (!fin)
1782		✗	return AVERROR(ENOMEM);
1783
1784		✗	while (x < sz) {
1785		✗	int acc_samples = 0;
1786		✗	int dst_offset = 0;
1787
1788		✗	while (nb_frame < s->nb_frames) {
1789		✗	AVFrame *cur_frame = s->frames[nb_frame];
1790		✗	int cur_frame_samples = cur_frame->nb_samples;
1791		✗	int nb_samples = 0;
1792
1793		✗	if (acc_samples < spf) {
1794		✗	nb_samples = FFMIN(spf - acc_samples, cur_frame_samples - src_offset);
1795		✗	acc_samples += nb_samples;
1796		✗	av_samples_copy(fin->extended_data, cur_frame->extended_data,
1797			dst_offset, src_offset, nb_samples,
1798			cur_frame->ch_layout.nb_channels, AV_SAMPLE_FMT_FLTP);
1799			}
1800
1801		✗	src_offset += nb_samples;
1802		✗	dst_offset += nb_samples;
1803		✗	if (cur_frame_samples <= src_offset) {
1804		✗	av_frame_free(&s->frames[nb_frame]);
1805		✗	nb_frame++;
1806		✗	src_offset = 0;
1807			}
1808
1809		✗	if (acc_samples == spf)
1810		✗	break;
1811			}
1812
1813		✗	ff_filter_execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
1814		✗	acalc_magnitudes(s);
1815
1816		✗	consumed += spf;
1817		✗	if (consumed >= spb) {
1818		✗	int h = s->orientation == VERTICAL ? s->h : s->w;
1819
1820		✗	scale_magnitudes(s, 1.f / (consumed / spf));
1821		✗	plot_spectrum_column(inlink, fin);
1822		✗	consumed = 0;
1823		✗	x++;
1824		✗	for (ch = 0; ch < s->nb_display_channels; ch++)
1825		✗	memset(s->magnitudes[ch], 0, h * sizeof(float));
1826			}
1827			}
1828
1829		✗	av_frame_free(&fin);
1830		✗	s->outpicref->pts = 0;
1831
1832		✗	if (s->legend)
1833		✗	draw_legend(ctx, s->samples);
1834
1835		✗	ret = ff_filter_frame(outlink, s->outpicref);
1836		✗	s->outpicref = NULL;
1837			}
1838
1839		✗	return ret;
1840			}
1841
1842		✗	static int showspectrumpic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
1843			{
1844		✗	AVFilterContext *ctx = inlink->dst;
1845		✗	ShowSpectrumContext *s = ctx->priv;
1846			void *ptr;
1847
1848		✗	if (s->nb_frames + 1ULL > s->frames_size / sizeof(*(s->frames))) {
1849		✗	ptr = av_fast_realloc(s->frames, &s->frames_size, s->frames_size * 2);
1850		✗	if (!ptr)
1851		✗	return AVERROR(ENOMEM);
1852		✗	s->frames = ptr;
1853			}
1854
1855		✗	s->frames[s->nb_frames] = insamples;
1856		✗	s->samples += insamples->nb_samples;
1857		✗	s->nb_frames++;
1858
1859		✗	return 0;
1860			}
1861
1862			static const AVFilterPad showspectrumpic_inputs[] = {
1863			{
1864			.name = "default",
1865			.type = AVMEDIA_TYPE_AUDIO,
1866			.filter_frame = showspectrumpic_filter_frame,
1867			},
1868			};
1869
1870			static const AVFilterPad showspectrumpic_outputs[] = {
1871			{
1872			.name = "default",
1873			.type = AVMEDIA_TYPE_VIDEO,
1874			.config_props = config_output,
1875			.request_frame = showspectrumpic_request_frame,
1876			},
1877			};
1878
1879			const AVFilter ff_avf_showspectrumpic = {
1880			.name = "showspectrumpic",
1881			.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output single picture."),
1882			.uninit = uninit,
1883			.priv_size = sizeof(ShowSpectrumContext),
1884			FILTER_INPUTS(showspectrumpic_inputs),
1885			FILTER_OUTPUTS(showspectrumpic_outputs),
1886			FILTER_QUERY_FUNC(query_formats),
1887			.priv_class = &showspectrumpic_class,
1888			.flags = AVFILTER_FLAG_SLICE_THREADS,
1889			};
1890
1891			#endif // CONFIG_SHOWSPECTRUMPIC_FILTER
1892