FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavfilter/avf_showspectrum.c
Date: 2024-07-14 13:34:57
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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