FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
avf_showspectrum.c
Go to the documentation of this file.
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 <math.h>
30 
31 #include "libavcodec/avfft.h"
32 #include "libavutil/audio_fifo.h"
33 #include "libavutil/avassert.h"
34 #include "libavutil/avstring.h"
35 #include "libavutil/channel_layout.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/xga_font_data.h"
38 #include "audio.h"
39 #include "video.h"
40 #include "avfilter.h"
41 #include "internal.h"
42 #include "window_func.h"
43 
44 enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
45 enum DataMode { D_MAGNITUDE, D_PHASE, NB_DMODES };
46 enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES };
47 enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, COOL, NB_CLMODES };
48 enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
49 enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
50 
51 typedef struct ShowSpectrumContext {
52  const AVClass *class;
53  int w, h;
54  AVFrame *outpicref;
55  int nb_display_channels;
56  int orientation;
57  int channel_width;
58  int channel_height;
59  int sliding; ///< 1 if sliding mode, 0 otherwise
60  int mode; ///< channel display mode
61  int color_mode; ///< display color scheme
62  int scale;
63  float saturation; ///< color saturation multiplier
64  float rotation; ///< color rotation
65  int data;
66  int xpos; ///< x position (current column)
67  FFTContext **fft; ///< Fast Fourier Transform context
68  int fft_bits; ///< number of bits (FFT window size = 1<<fft_bits)
69  FFTComplex **fft_data; ///< bins holder for each (displayed) channels
70  float *window_func_lut; ///< Window function LUT
71  float **magnitudes;
72  float **phases;
73  int win_func;
74  int win_size;
75  double win_scale;
76  float overlap;
77  float gain;
78  int hop_size;
79  float *combine_buffer; ///< color combining buffer (3 * h items)
80  float **color_buffer; ///< color buffer (3 * h * ch items)
81  AVAudioFifo *fifo;
82  int64_t pts;
83  int single_pic;
84  int legend;
85  int start_x, start_y;
86 } ShowSpectrumContext;
87 
88 #define OFFSET(x) offsetof(ShowSpectrumContext, x)
89 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
90 
91 static const AVOption showspectrum_options[] = {
92  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
93  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
94  { "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_SLIDES-1, FLAGS, "slide" },
95  { "replace", "replace old columns with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, "slide" },
96  { "scroll", "scroll from right to left", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" },
97  { "fullframe", "return full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, FLAGS, "slide" },
98  { "rscroll", "scroll from left to right", 0, AV_OPT_TYPE_CONST, {.i64=RSCROLL}, 0, 0, FLAGS, "slide" },
99  { "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, COMBINED, NB_MODES-1, FLAGS, "mode" },
100  { "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "mode" },
101  { "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "mode" },
102  { "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=CHANNEL}, CHANNEL, NB_CLMODES-1, FLAGS, "color" },
103  { "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" },
104  { "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" },
105  { "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" },
106  { "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" },
107  { "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" },
108  { "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" },
109  { "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" },
110  { "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" },
111  { "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, "color" },
112  { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
113  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
114  { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
115  { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
116  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
117  { "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" },
118  { "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" },
119  { "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
120  { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
121  { "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" },
122  { "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },
123  { "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
124  { "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
125  { "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" },
126  { "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
127  { "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" },
128  { "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" },
129  { "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" },
130  { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" },
131  { "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" },
132  { "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" },
133  { "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" },
134  { "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" },
135  { "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" },
136  { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" },
137  { "dolph", "Dolph-Chebyshev", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_DOLPH}, 0, 0, FLAGS, "win_func" },
138  { "cauchy", "Cauchy", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_CAUCHY}, 0, 0, FLAGS, "win_func" },
139  { "parzen", "Parzen", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_PARZEN}, 0, 0, FLAGS, "win_func" },
140  { "poisson", "Poisson", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_POISSON}, 0, 0, FLAGS, "win_func" },
141  { "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" },
142  { "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" },
143  { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" },
144  { "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, 1, FLAGS },
145  { "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
146  { "data", "set data mode", OFFSET(data), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_DMODES-1, FLAGS, "data" },
147  { "magnitude", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_MAGNITUDE}, 0, 0, FLAGS, "data" },
148  { "phase", NULL, 0, AV_OPT_TYPE_CONST, {.i64=D_PHASE}, 0, 0, FLAGS, "data" },
149  { "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
150  { NULL }
151 };
152 
153 AVFILTER_DEFINE_CLASS(showspectrum);
154 
155 static const struct ColorTable {
156  float a, y, u, v;
157 } color_table[][8] = {
158  [INTENSITY] = {
159  { 0, 0, 0, 0 },
160  { 0.13, .03587126228984074, .1573300977624594, -.02548747583751842 },
161  { 0.30, .18572281794568020, .1772436246393981, .17475554840414750 },
162  { 0.60, .28184980583656130, -.1593064119945782, .47132074554608920 },
163  { 0.73, .65830621175547810, -.3716070802232764, .24352759331252930 },
164  { 0.78, .76318535758242900, -.4307467689263783, .16866496622310430 },
165  { 0.91, .95336363636363640, -.2045454545454546, .03313636363636363 },
166  { 1, 1, 0, 0 }},
167  [RAINBOW] = {
168  { 0, 0, 0, 0 },
169  { 0.13, 44/256., (189-128)/256., (138-128)/256. },
170  { 0.25, 29/256., (186-128)/256., (119-128)/256. },
171  { 0.38, 119/256., (194-128)/256., (53-128)/256. },
172  { 0.60, 111/256., (73-128)/256., (59-128)/256. },
173  { 0.73, 205/256., (19-128)/256., (149-128)/256. },
174  { 0.86, 135/256., (83-128)/256., (200-128)/256. },
175  { 1, 73/256., (95-128)/256., (225-128)/256. }},
176  [MORELAND] = {
177  { 0, 44/256., (181-128)/256., (112-128)/256. },
178  { 0.13, 126/256., (177-128)/256., (106-128)/256. },
179  { 0.25, 164/256., (163-128)/256., (109-128)/256. },
180  { 0.38, 200/256., (140-128)/256., (120-128)/256. },
181  { 0.60, 201/256., (117-128)/256., (141-128)/256. },
182  { 0.73, 177/256., (103-128)/256., (165-128)/256. },
183  { 0.86, 136/256., (100-128)/256., (183-128)/256. },
184  { 1, 68/256., (117-128)/256., (203-128)/256. }},
185  [NEBULAE] = {
186  { 0, 10/256., (134-128)/256., (132-128)/256. },
187  { 0.23, 21/256., (137-128)/256., (130-128)/256. },
188  { 0.45, 35/256., (134-128)/256., (134-128)/256. },
189  { 0.57, 51/256., (130-128)/256., (139-128)/256. },
190  { 0.67, 104/256., (116-128)/256., (162-128)/256. },
191  { 0.77, 120/256., (105-128)/256., (188-128)/256. },
192  { 0.87, 140/256., (105-128)/256., (188-128)/256. },
193  { 1, 1, 0, 0 }},
194  [FIRE] = {
195  { 0, 0, 0, 0 },
196  { 0.23, 44/256., (132-128)/256., (127-128)/256. },
197  { 0.45, 62/256., (116-128)/256., (140-128)/256. },
198  { 0.57, 75/256., (105-128)/256., (152-128)/256. },
199  { 0.67, 95/256., (91-128)/256., (166-128)/256. },
200  { 0.77, 126/256., (74-128)/256., (172-128)/256. },
201  { 0.87, 164/256., (73-128)/256., (162-128)/256. },
202  { 1, 1, 0, 0 }},
203  [FIERY] = {
204  { 0, 0, 0, 0 },
205  { 0.23, 36/256., (116-128)/256., (163-128)/256. },
206  { 0.45, 52/256., (102-128)/256., (200-128)/256. },
207  { 0.57, 116/256., (84-128)/256., (196-128)/256. },
208  { 0.67, 157/256., (67-128)/256., (181-128)/256. },
209  { 0.77, 193/256., (40-128)/256., (155-128)/256. },
210  { 0.87, 221/256., (101-128)/256., (134-128)/256. },
211  { 1, 1, 0, 0 }},
212  [FRUIT] = {
213  { 0, 0, 0, 0 },
214  { 0.20, 29/256., (136-128)/256., (119-128)/256. },
215  { 0.30, 60/256., (119-128)/256., (90-128)/256. },
216  { 0.40, 85/256., (91-128)/256., (85-128)/256. },
217  { 0.50, 116/256., (70-128)/256., (105-128)/256. },
218  { 0.60, 151/256., (50-128)/256., (146-128)/256. },
219  { 0.70, 191/256., (63-128)/256., (178-128)/256. },
220  { 1, 98/256., (80-128)/256., (221-128)/256. }},
221  [COOL] = {
222  { 0, 0, 0, 0 },
223  { .15, 0, .5, -.5 },
224  { 1, 1, -.5, .5 }},
225 };
226 
227 static av_cold void uninit(AVFilterContext *ctx)
228 {
229  ShowSpectrumContext *s = ctx->priv;
230  int i;
231 
232  av_freep(&s->combine_buffer);
233  if (s->fft) {
234  for (i = 0; i < s->nb_display_channels; i++)
235  av_fft_end(s->fft[i]);
236  }
237  av_freep(&s->fft);
238  if (s->fft_data) {
239  for (i = 0; i < s->nb_display_channels; i++)
240  av_freep(&s->fft_data[i]);
241  }
242  av_freep(&s->fft_data);
243  if (s->color_buffer) {
244  for (i = 0; i < s->nb_display_channels; i++)
245  av_freep(&s->color_buffer[i]);
246  }
247  av_freep(&s->color_buffer);
248  av_freep(&s->window_func_lut);
249  if (s->magnitudes) {
250  for (i = 0; i < s->nb_display_channels; i++)
251  av_freep(&s->magnitudes[i]);
252  }
253  av_freep(&s->magnitudes);
254  av_frame_free(&s->outpicref);
255  av_audio_fifo_free(s->fifo);
256  if (s->phases) {
257  for (i = 0; i < s->nb_display_channels; i++)
258  av_freep(&s->phases[i]);
259  }
260  av_freep(&s->phases);
261 }
262 
263 static int query_formats(AVFilterContext *ctx)
264 {
265  AVFilterFormats *formats = NULL;
266  AVFilterChannelLayouts *layouts = NULL;
267  AVFilterLink *inlink = ctx->inputs[0];
268  AVFilterLink *outlink = ctx->outputs[0];
269  static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
270  static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE };
271  int ret;
272 
273  /* set input audio formats */
274  formats = ff_make_format_list(sample_fmts);
275  if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)
276  return ret;
277 
278  layouts = ff_all_channel_layouts();
279  if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
280  return ret;
281 
282  formats = ff_all_samplerates();
283  if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
284  return ret;
285 
286  /* set output video format */
287  formats = ff_make_format_list(pix_fmts);
288  if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
289  return ret;
290 
291  return 0;
292 }
293 
294 static int config_output(AVFilterLink *outlink)
295 {
296  AVFilterContext *ctx = outlink->src;
297  AVFilterLink *inlink = ctx->inputs[0];
298  ShowSpectrumContext *s = ctx->priv;
299  int i, fft_bits, h, w;
300  float overlap;
301 
302  s->pts = AV_NOPTS_VALUE;
303 
304  if (!strcmp(ctx->filter->name, "showspectrumpic"))
305  s->single_pic = 1;
306 
307  outlink->w = s->w;
308  outlink->h = s->h;
309  outlink->sample_aspect_ratio = (AVRational){1,1};
310 
311  if (s->legend) {
312  s->start_x = log10(inlink->sample_rate) * 25;
313  s->start_y = 64;
314  outlink->w += s->start_x * 2;
315  outlink->h += s->start_y * 2;
316  }
317 
318  h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->channels;
319  w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->channels;
320  s->channel_height = h;
321  s->channel_width = w;
322 
323  if (s->orientation == VERTICAL) {
324  /* FFT window size (precision) according to the requested output frame height */
325  for (fft_bits = 1; 1 << fft_bits < 2 * h; fft_bits++);
326  } else {
327  /* FFT window size (precision) according to the requested output frame width */
328  for (fft_bits = 1; 1 << fft_bits < 2 * w; fft_bits++);
329  }
330  s->win_size = 1 << fft_bits;
331 
332  if (!s->fft) {
333  s->fft = av_calloc(inlink->channels, sizeof(*s->fft));
334  if (!s->fft)
335  return AVERROR(ENOMEM);
336  }
337 
338  /* (re-)configuration if the video output changed (or first init) */
339  if (fft_bits != s->fft_bits) {
340  AVFrame *outpicref;
341 
342  s->fft_bits = fft_bits;
343 
344  /* FFT buffers: x2 for each (display) channel buffer.
345  * Note: we use free and malloc instead of a realloc-like function to
346  * make sure the buffer is aligned in memory for the FFT functions. */
347  for (i = 0; i < s->nb_display_channels; i++) {
348  av_fft_end(s->fft[i]);
349  av_freep(&s->fft_data[i]);
350  }
351  av_freep(&s->fft_data);
352 
353  s->nb_display_channels = inlink->channels;
354  for (i = 0; i < s->nb_display_channels; i++) {
355  s->fft[i] = av_fft_init(fft_bits, 0);
356  if (!s->fft[i]) {
357  av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
358  "The window size might be too high.\n");
359  return AVERROR(EINVAL);
360  }
361  }
362 
363  s->magnitudes = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes));
364  if (!s->magnitudes)
365  return AVERROR(ENOMEM);
366  for (i = 0; i < s->nb_display_channels; i++) {
367  s->magnitudes[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->magnitudes));
368  if (!s->magnitudes[i])
369  return AVERROR(ENOMEM);
370  }
371 
372  s->phases = av_calloc(s->nb_display_channels, sizeof(*s->phases));
373  if (!s->phases)
374  return AVERROR(ENOMEM);
375  for (i = 0; i < s->nb_display_channels; i++) {
376  s->phases[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->phases));
377  if (!s->phases[i])
378  return AVERROR(ENOMEM);
379  }
380 
381  av_freep(&s->color_buffer);
382  s->color_buffer = av_calloc(s->nb_display_channels, sizeof(*s->color_buffer));
383  if (!s->color_buffer)
384  return AVERROR(ENOMEM);
385  for (i = 0; i < s->nb_display_channels; i++) {
386  s->color_buffer[i] = av_calloc(s->orientation == VERTICAL ? s->h * 3 : s->w * 3, sizeof(**s->color_buffer));
387  if (!s->color_buffer[i])
388  return AVERROR(ENOMEM);
389  }
390 
391  s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data));
392  if (!s->fft_data)
393  return AVERROR(ENOMEM);
394  for (i = 0; i < s->nb_display_channels; i++) {
395  s->fft_data[i] = av_calloc(s->win_size, sizeof(**s->fft_data));
396  if (!s->fft_data[i])
397  return AVERROR(ENOMEM);
398  }
399 
400  /* pre-calc windowing function */
401  s->window_func_lut =
402  av_realloc_f(s->window_func_lut, s->win_size,
403  sizeof(*s->window_func_lut));
404  if (!s->window_func_lut)
405  return AVERROR(ENOMEM);
406  generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
407  if (s->overlap == 1)
408  s->overlap = overlap;
409  s->hop_size = (1. - s->overlap) * s->win_size;
410  if (s->hop_size < 1) {
411  av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
412  return AVERROR(EINVAL);
413  }
414 
415  for (s->win_scale = 0, i = 0; i < s->win_size; i++) {
416  s->win_scale += s->window_func_lut[i] * s->window_func_lut[i];
417  }
418  s->win_scale = 1. / sqrt(s->win_scale);
419 
420  /* prepare the initial picref buffer (black frame) */
421  av_frame_free(&s->outpicref);
422  s->outpicref = outpicref =
423  ff_get_video_buffer(outlink, outlink->w, outlink->h);
424  if (!outpicref)
425  return AVERROR(ENOMEM);
426  outpicref->sample_aspect_ratio = (AVRational){1,1};
427  for (i = 0; i < outlink->h; i++) {
428  memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
429  memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
430  memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
431  }
432  outpicref->color_range = AVCOL_RANGE_JPEG;
433  }
434 
435  if ((s->orientation == VERTICAL && s->xpos >= s->w) ||
436  (s->orientation == HORIZONTAL && s->xpos >= s->h))
437  s->xpos = 0;
438 
439  outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap));
440  if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
441  outlink->frame_rate.den *= s->w;
442  if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
443  outlink->frame_rate.den *= s->h;
444 
445  if (s->orientation == VERTICAL) {
446  s->combine_buffer =
447  av_realloc_f(s->combine_buffer, s->h * 3,
448  sizeof(*s->combine_buffer));
449  } else {
450  s->combine_buffer =
451  av_realloc_f(s->combine_buffer, s->w * 3,
452  sizeof(*s->combine_buffer));
453  }
454 
455  av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d FFT window size:%d\n",
456  s->w, s->h, s->win_size);
457 
458  av_audio_fifo_free(s->fifo);
459  s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->win_size);
460  if (!s->fifo)
461  return AVERROR(ENOMEM);
462  return 0;
463 }
464 
465 static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
466 {
467  ShowSpectrumContext *s = ctx->priv;
468  const float *window_func_lut = s->window_func_lut;
469  AVFrame *fin = arg;
470  const int ch = jobnr;
471  int n;
472 
473  /* fill FFT input with the number of samples available */
474  const float *p = (float *)fin->extended_data[ch];
475 
476  for (n = 0; n < s->win_size; n++) {
477  s->fft_data[ch][n].re = p[n] * window_func_lut[n];
478  s->fft_data[ch][n].im = 0;
479  }
480 
481  /* run FFT on each samples set */
482  av_fft_permute(s->fft[ch], s->fft_data[ch]);
483  av_fft_calc(s->fft[ch], s->fft_data[ch]);
484 
485  return 0;
486 }
487 
488 #define RE(y, ch) s->fft_data[ch][y].re
489 #define IM(y, ch) s->fft_data[ch][y].im
490 #define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, ch))
491 #define PHASE(y, ch) atan2(IM(y, ch), RE(y, ch))
492 
493 static int calc_channel_magnitudes(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
494 {
495  ShowSpectrumContext *s = ctx->priv;
496  const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
497  int y, h = s->orientation == VERTICAL ? s->h : s->w;
498  const float f = s->gain * w;
499  const int ch = jobnr;
500  float *magnitudes = s->magnitudes[ch];
501 
502  for (y = 0; y < h; y++)
503  magnitudes[y] = MAGNITUDE(y, ch) * f;
504 
505  return 0;
506 }
507 
508 static int calc_channel_phases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
509 {
510  ShowSpectrumContext *s = ctx->priv;
511  const int h = s->orientation == VERTICAL ? s->h : s->w;
512  const int ch = jobnr;
513  float *phases = s->phases[ch];
514  int y;
515 
516  for (y = 0; y < h; y++)
517  phases[y] = (PHASE(y, ch) / M_PI + 1) / 2;
518 
519  return 0;
520 }
521 
522 static void acalc_magnitudes(ShowSpectrumContext *s)
523 {
524  const double w = s->win_scale * (s->scale == LOG ? s->win_scale : 1);
525  int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
526  const float f = s->gain * w;
527 
528  for (ch = 0; ch < s->nb_display_channels; ch++) {
529  float *magnitudes = s->magnitudes[ch];
530 
531  for (y = 0; y < h; y++)
532  magnitudes[y] += MAGNITUDE(y, ch) * f;
533  }
534 }
535 
536 static void scale_magnitudes(ShowSpectrumContext *s, float scale)
537 {
538  int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
539 
540  for (ch = 0; ch < s->nb_display_channels; ch++) {
541  float *magnitudes = s->magnitudes[ch];
542 
543  for (y = 0; y < h; y++)
544  magnitudes[y] *= scale;
545  }
546 }
547 
548 static void color_range(ShowSpectrumContext *s, int ch,
549  float *yf, float *uf, float *vf)
550 {
551  switch (s->mode) {
552  case COMBINED:
553  // reduce range by channel count
554  *yf = 256.0f / s->nb_display_channels;
555  switch (s->color_mode) {
556  case RAINBOW:
557  case MORELAND:
558  case NEBULAE:
559  case FIRE:
560  case FIERY:
561  case FRUIT:
562  case COOL:
563  case INTENSITY:
564  *uf = *yf;
565  *vf = *yf;
566  break;
567  case CHANNEL:
568  /* adjust saturation for mixed UV coloring */
569  /* this factor is correct for infinite channels, an approximation otherwise */
570  *uf = *yf * M_PI;
571  *vf = *yf * M_PI;
572  break;
573  default:
574  av_assert0(0);
575  }
576  break;
577  case SEPARATE:
578  // full range
579  *yf = 256.0f;
580  *uf = 256.0f;
581  *vf = 256.0f;
582  break;
583  default:
584  av_assert0(0);
585  }
586 
587  if (s->color_mode == CHANNEL) {
588  if (s->nb_display_channels > 1) {
589  *uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
590  *vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels + M_PI * s->rotation);
591  } else {
592  *uf *= 0.5 * sin(M_PI * s->rotation);
593  *vf *= 0.5 * cos(M_PI * s->rotation + M_PI_2);
594  }
595  } else {
596  *uf += *uf * sin(M_PI * s->rotation);
597  *vf += *vf * cos(M_PI * s->rotation + M_PI_2);
598  }
599 
600  *uf *= s->saturation;
601  *vf *= s->saturation;
602 }
603 
604 static void pick_color(ShowSpectrumContext *s,
605  float yf, float uf, float vf,
606  float a, float *out)
607 {
608  if (s->color_mode > CHANNEL) {
609  const int cm = s->color_mode;
610  float y, u, v;
611  int i;
612 
613  for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++)
614  if (color_table[cm][i].a >= a)
615  break;
616  // i now is the first item >= the color
617  // now we know to interpolate between item i - 1 and i
618  if (a <= color_table[cm][i - 1].a) {
619  y = color_table[cm][i - 1].y;
620  u = color_table[cm][i - 1].u;
621  v = color_table[cm][i - 1].v;
622  } else if (a >= color_table[cm][i].a) {
623  y = color_table[cm][i].y;
624  u = color_table[cm][i].u;
625  v = color_table[cm][i].v;
626  } else {
627  float start = color_table[cm][i - 1].a;
628  float end = color_table[cm][i].a;
629  float lerpfrac = (a - start) / (end - start);
630  y = color_table[cm][i - 1].y * (1.0f - lerpfrac)
631  + color_table[cm][i].y * lerpfrac;
632  u = color_table[cm][i - 1].u * (1.0f - lerpfrac)
633  + color_table[cm][i].u * lerpfrac;
634  v = color_table[cm][i - 1].v * (1.0f - lerpfrac)
635  + color_table[cm][i].v * lerpfrac;
636  }
637 
638  out[0] = y * yf;
639  out[1] = u * uf;
640  out[2] = v * vf;
641  } else {
642  out[0] = a * yf;
643  out[1] = a * uf;
644  out[2] = a * vf;
645  }
646 }
647 
648 static void clear_combine_buffer(ShowSpectrumContext *s, int size)
649 {
650  int y;
651 
652  for (y = 0; y < size; y++) {
653  s->combine_buffer[3 * y ] = 0;
654  s->combine_buffer[3 * y + 1] = 127.5;
655  s->combine_buffer[3 * y + 2] = 127.5;
656  }
657 }
658 
659 static int plot_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
660 {
661  ShowSpectrumContext *s = ctx->priv;
662  const int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
663  const int ch = jobnr;
664  float *magnitudes = s->magnitudes[ch];
665  float *phases = s->phases[ch];
666  float yf, uf, vf;
667  int y;
668 
669  /* decide color range */
670  color_range(s, ch, &yf, &uf, &vf);
671 
672  /* draw the channel */
673  for (y = 0; y < h; y++) {
674  int row = (s->mode == COMBINED) ? y : ch * h + y;
675  float *out = &s->color_buffer[ch][3 * row];
676  float a;
677 
678  switch (s->data) {
679  case D_MAGNITUDE:
680  /* get magnitude */
681  a = magnitudes[y];
682  break;
683  case D_PHASE:
684  /* get phase */
685  a = phases[y];
686  break;
687  default:
688  av_assert0(0);
689  }
690 
691  /* apply scale */
692  switch (s->scale) {
693  case LINEAR:
694  a = av_clipf(a, 0, 1);
695  break;
696  case SQRT:
697  a = av_clipf(sqrt(a), 0, 1);
698  break;
699  case CBRT:
700  a = av_clipf(cbrt(a), 0, 1);
701  break;
702  case FOURTHRT:
703  a = av_clipf(sqrt(sqrt(a)), 0, 1);
704  break;
705  case FIFTHRT:
706  a = av_clipf(pow(a, 0.20), 0, 1);
707  break;
708  case LOG:
709  a = 1 + log10(av_clipd(a, 1e-6, 1)) / 6; // zero = -120dBFS
710  break;
711  default:
712  av_assert0(0);
713  }
714 
715  pick_color(s, yf, uf, vf, a, out);
716  }
717 
718  return 0;
719 }
720 
721 static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
722 {
723  AVFilterContext *ctx = inlink->dst;
724  AVFilterLink *outlink = ctx->outputs[0];
725  ShowSpectrumContext *s = ctx->priv;
726  AVFrame *outpicref = s->outpicref;
727  int ret, plane, x, y, z = s->orientation == VERTICAL ? s->h : s->w;
728 
729  /* fill a new spectrum column */
730  /* initialize buffer for combining to black */
731  clear_combine_buffer(s, z);
732 
733  ctx->internal->execute(ctx, plot_channel, NULL, NULL, s->nb_display_channels);
734 
735  for (y = 0; y < z * 3; y++) {
736  for (x = 0; x < s->nb_display_channels; x++) {
737  s->combine_buffer[y] += s->color_buffer[x][y];
738  }
739  }
740 
741  av_frame_make_writable(s->outpicref);
742  /* copy to output */
743  if (s->orientation == VERTICAL) {
744  if (s->sliding == SCROLL) {
745  for (plane = 0; plane < 3; plane++) {
746  for (y = 0; y < s->h; y++) {
747  uint8_t *p = outpicref->data[plane] +
748  y * outpicref->linesize[plane];
749  memmove(p, p + 1, s->w - 1);
750  }
751  }
752  s->xpos = s->w - 1;
753  } else if (s->sliding == RSCROLL) {
754  for (plane = 0; plane < 3; plane++) {
755  for (y = 0; y < s->h; y++) {
756  uint8_t *p = outpicref->data[plane] +
757  y * outpicref->linesize[plane];
758  memmove(p + 1, p, s->w - 1);
759  }
760  }
761  s->xpos = 0;
762  }
763  for (plane = 0; plane < 3; plane++) {
764  uint8_t *p = outpicref->data[plane] + s->start_x +
765  (outlink->h - 1 - s->start_y) * outpicref->linesize[plane] +
766  s->xpos;
767  for (y = 0; y < s->h; y++) {
768  *p = lrintf(av_clipf(s->combine_buffer[3 * y + plane], 0, 255));
769  p -= outpicref->linesize[plane];
770  }
771  }
772  } else {
773  if (s->sliding == SCROLL) {
774  for (plane = 0; plane < 3; plane++) {
775  for (y = 1; y < s->h; y++) {
776  memmove(outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
777  outpicref->data[plane] + (y ) * outpicref->linesize[plane],
778  s->w);
779  }
780  }
781  s->xpos = s->h - 1;
782  } else if (s->sliding == RSCROLL) {
783  for (plane = 0; plane < 3; plane++) {
784  for (y = s->h - 1; y >= 1; y--) {
785  memmove(outpicref->data[plane] + (y ) * outpicref->linesize[plane],
786  outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
787  s->w);
788  }
789  }
790  s->xpos = 0;
791  }
792  for (plane = 0; plane < 3; plane++) {
793  uint8_t *p = outpicref->data[plane] + s->start_x +
794  (s->xpos + s->start_y) * outpicref->linesize[plane];
795  for (x = 0; x < s->w; x++) {
796  *p = lrintf(av_clipf(s->combine_buffer[3 * x + plane], 0, 255));
797  p++;
798  }
799  }
800  }
801 
802  if (s->sliding != FULLFRAME || s->xpos == 0)
803  outpicref->pts = insamples->pts;
804 
805  s->xpos++;
806  if (s->orientation == VERTICAL && s->xpos >= s->w)
807  s->xpos = 0;
808  if (s->orientation == HORIZONTAL && s->xpos >= s->h)
809  s->xpos = 0;
810  if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
811  ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
812  if (ret < 0)
813  return ret;
814  }
815 
816  return s->win_size;
817 }
818 
819 #if CONFIG_SHOWSPECTRUM_FILTER
820 
821 static int request_frame(AVFilterLink *outlink)
822 {
823  ShowSpectrumContext *s = outlink->src->priv;
824  AVFilterLink *inlink = outlink->src->inputs[0];
825  unsigned i;
826  int ret;
827 
828  ret = ff_request_frame(inlink);
829  if (ret == AVERROR_EOF && s->sliding == FULLFRAME && s->xpos > 0 &&
830  s->outpicref) {
831  if (s->orientation == VERTICAL) {
832  for (i = 0; i < outlink->h; i++) {
833  memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos);
834  memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos);
835  memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos);
836  }
837  } else {
838  for (i = s->xpos; i < outlink->h; i++) {
839  memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w);
840  memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w);
841  memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w);
842  }
843  }
844  ret = ff_filter_frame(outlink, s->outpicref);
845  s->outpicref = NULL;
846  }
847 
848  return ret;
849 }
850 
851 static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
852 {
853  AVFilterContext *ctx = inlink->dst;
854  ShowSpectrumContext *s = ctx->priv;
855  AVFrame *fin = NULL;
856  int ret = 0, consumed = 0;
857 
858  if (s->pts == AV_NOPTS_VALUE)
859  s->pts = insamples->pts - av_audio_fifo_size(s->fifo);
860 
861  av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples);
862  av_frame_free(&insamples);
863  while (av_audio_fifo_size(s->fifo) >= s->win_size) {
864  fin = ff_get_audio_buffer(inlink, s->win_size);
865  if (!fin) {
866  ret = AVERROR(ENOMEM);
867  goto fail;
868  }
869 
870  fin->pts = s->pts + consumed;
871  consumed += s->hop_size;
872  ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
873  if (ret < 0)
874  goto fail;
875 
876  av_assert0(fin->nb_samples == s->win_size);
877 
878  ctx->internal->execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
879 
880  if (s->data == D_MAGNITUDE)
881  ctx->internal->execute(ctx, calc_channel_magnitudes, NULL, NULL, s->nb_display_channels);
882 
883  if (s->data == D_PHASE)
884  ctx->internal->execute(ctx, calc_channel_phases, NULL, NULL, s->nb_display_channels);
885 
886  ret = plot_spectrum_column(inlink, fin);
887  av_frame_free(&fin);
888  av_audio_fifo_drain(s->fifo, s->hop_size);
889  if (ret < 0)
890  goto fail;
891  }
892 
893 fail:
894  s->pts = AV_NOPTS_VALUE;
895  av_frame_free(&fin);
896  return ret;
897 }
898 
899 static const AVFilterPad showspectrum_inputs[] = {
900  {
901  .name = "default",
902  .type = AVMEDIA_TYPE_AUDIO,
903  .filter_frame = filter_frame,
904  },
905  { NULL }
906 };
907 
908 static const AVFilterPad showspectrum_outputs[] = {
909  {
910  .name = "default",
911  .type = AVMEDIA_TYPE_VIDEO,
912  .config_props = config_output,
913  .request_frame = request_frame,
914  },
915  { NULL }
916 };
917 
918 AVFilter ff_avf_showspectrum = {
919  .name = "showspectrum",
920  .description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output."),
921  .uninit = uninit,
922  .query_formats = query_formats,
923  .priv_size = sizeof(ShowSpectrumContext),
924  .inputs = showspectrum_inputs,
925  .outputs = showspectrum_outputs,
926  .priv_class = &showspectrum_class,
927  .flags = AVFILTER_FLAG_SLICE_THREADS,
928 };
929 #endif // CONFIG_SHOWSPECTRUM_FILTER
930 
931 #if CONFIG_SHOWSPECTRUMPIC_FILTER
932 
933 static const AVOption showspectrumpic_options[] = {
934  { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
935  { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
936  { "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_MODES-1, FLAGS, "mode" },
937  { "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "mode" },
938  { "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "mode" },
939  { "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=INTENSITY}, 0, NB_CLMODES-1, FLAGS, "color" },
940  { "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" },
941  { "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" },
942  { "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" },
943  { "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" },
944  { "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" },
945  { "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" },
946  { "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" },
947  { "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" },
948  { "cool", "cool based coloring", 0, AV_OPT_TYPE_CONST, {.i64=COOL}, 0, 0, FLAGS, "color" },
949  { "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, "scale" },
950  { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
951  { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
952  { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
953  { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
954  { "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" },
955  { "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" },
956  { "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
957  { "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
958  { "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" },
959  { "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },
960  { "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
961  { "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
962  { "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" },
963  { "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
964  { "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" },
965  { "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" },
966  { "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" },
967  { "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" },
968  { "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" },
969  { "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" },
970  { "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" },
971  { "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" },
972  { "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" },
973  { "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" },
974  { "dolph", "Dolph-Chebyshev", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_DOLPH}, 0, 0, FLAGS, "win_func" },
975  { "cauchy", "Cauchy", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_CAUCHY}, 0, 0, FLAGS, "win_func" },
976  { "parzen", "Parzen", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_PARZEN}, 0, 0, FLAGS, "win_func" },
977  { "poisson", "Poisson", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_POISSON}, 0, 0, FLAGS, "win_func" },
978  { "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" },
979  { "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" },
980  { "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" },
981  { "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
982  { "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
983  { "rotation", "color rotation", OFFSET(rotation), AV_OPT_TYPE_FLOAT, {.dbl = 0}, -1, 1, FLAGS },
984  { NULL }
985 };
986 
987 AVFILTER_DEFINE_CLASS(showspectrumpic);
988 
989 static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
990 {
991  const uint8_t *font;
992  int font_height;
993  int i;
994 
995  font = avpriv_cga_font, font_height = 8;
996 
997  for (i = 0; txt[i]; i++) {
998  int char_y, mask;
999 
1000  if (o) {
1001  for (char_y = font_height - 1; char_y >= 0; char_y--) {
1002  uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
1003  for (mask = 0x80; mask; mask >>= 1) {
1004  if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
1005  p[char_y] = ~p[char_y];
1006  p += pic->linesize[0];
1007  }
1008  }
1009  } else {
1010  uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
1011  for (char_y = 0; char_y < font_height; char_y++) {
1012  for (mask = 0x80; mask; mask >>= 1) {
1013  if (font[txt[i] * font_height + char_y] & mask)
1014  *p = ~(*p);
1015  p++;
1016  }
1017  p += pic->linesize[0] - 8;
1018  }
1019  }
1020  }
1021 }
1022 
1023 static int showspectrumpic_request_frame(AVFilterLink *outlink)
1024 {
1025  AVFilterContext *ctx = outlink->src;
1026  ShowSpectrumContext *s = ctx->priv;
1027  AVFilterLink *inlink = ctx->inputs[0];
1028  int ret, samples;
1029 
1030  ret = ff_request_frame(inlink);
1031  samples = av_audio_fifo_size(s->fifo);
1032  if (ret == AVERROR_EOF && s->outpicref && samples > 0) {
1033  int consumed = 0;
1034  int y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
1035  int ch, spf, spb;
1036  AVFrame *fin;
1037 
1038  spf = s->win_size * (samples / ((s->win_size * sz) * ceil(samples / (float)(s->win_size * sz))));
1039  spf = FFMAX(1, spf);
1040 
1041  spb = (samples / (spf * sz)) * spf;
1042 
1043  fin = ff_get_audio_buffer(inlink, s->win_size);
1044  if (!fin)
1045  return AVERROR(ENOMEM);
1046 
1047  while (x < sz) {
1048  ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
1049  if (ret < 0) {
1050  av_frame_free(&fin);
1051  return ret;
1052  }
1053 
1054  av_audio_fifo_drain(s->fifo, spf);
1055 
1056  if (ret < s->win_size) {
1057  for (ch = 0; ch < s->nb_display_channels; ch++) {
1058  memset(fin->extended_data[ch] + ret * sizeof(float), 0,
1059  (s->win_size - ret) * sizeof(float));
1060  }
1061  }
1062 
1063  ctx->internal->execute(ctx, run_channel_fft, fin, NULL, s->nb_display_channels);
1064  acalc_magnitudes(s);
1065 
1066  consumed += spf;
1067  if (consumed >= spb) {
1068  int h = s->orientation == VERTICAL ? s->h : s->w;
1069 
1070  scale_magnitudes(s, 1. / (consumed / spf));
1071  plot_spectrum_column(inlink, fin);
1072  consumed = 0;
1073  x++;
1074  for (ch = 0; ch < s->nb_display_channels; ch++)
1075  memset(s->magnitudes[ch], 0, h * sizeof(float));
1076  }
1077  }
1078 
1079  av_frame_free(&fin);
1080  s->outpicref->pts = 0;
1081 
1082  if (s->legend) {
1083  int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
1084  float spp = samples / (float)sz;
1085  uint8_t *dst;
1086 
1087  drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
1088 
1089  dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
1090  for (x = 0; x < s->w + 1; x++)
1091  dst[x] = 200;
1092  dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
1093  for (x = 0; x < s->w + 1; x++)
1094  dst[x] = 200;
1095  for (y = 0; y < s->h + 2; y++) {
1096  dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
1097  dst[s->start_x - 1] = 200;
1098  dst[s->start_x + s->w] = 200;
1099  }
1100  if (s->orientation == VERTICAL) {
1101  int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
1102  for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
1103  for (y = 0; y < h; y += 20) {
1104  dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0];
1105  dst[s->start_x - 2] = 200;
1106  dst[s->start_x + s->w + 1] = 200;
1107  }
1108  for (y = 0; y < h; y += 40) {
1109  dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0];
1110  dst[s->start_x - 3] = 200;
1111  dst[s->start_x + s->w + 2] = 200;
1112  }
1113  dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
1114  for (x = 0; x < s->w; x+=40)
1115  dst[x] = 200;
1116  dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
1117  for (x = 0; x < s->w; x+=80)
1118  dst[x] = 200;
1119  dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
1120  for (x = 0; x < s->w; x+=40) {
1121  dst[x] = 200;
1122  }
1123  dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
1124  for (x = 0; x < s->w; x+=80) {
1125  dst[x] = 200;
1126  }
1127  for (y = 0; y < h; y += 40) {
1128  float hertz = y * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(h)));
1129  char *units;
1130 
1131  if (hertz == 0)
1132  units = av_asprintf("DC");
1133  else
1134  units = av_asprintf("%.2f", hertz);
1135  if (!units)
1136  return AVERROR(ENOMEM);
1137 
1138  drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4, units, 0);
1139  av_free(units);
1140  }
1141  }
1142 
1143  for (x = 0; x < s->w; x+=80) {
1144  float seconds = x * spp / inlink->sample_rate;
1145  char *units;
1146 
1147  if (x == 0)
1148  units = av_asprintf("0");
1149  else if (log10(seconds) > 6)
1150  units = av_asprintf("%.2fh", seconds / (60 * 60));
1151  else if (log10(seconds) > 3)
1152  units = av_asprintf("%.2fm", seconds / 60);
1153  else
1154  units = av_asprintf("%.2fs", seconds);
1155  if (!units)
1156  return AVERROR(ENOMEM);
1157 
1158  drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->h + s->start_y + 6, units, 0);
1159  drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->start_y - 12, units, 0);
1160  av_free(units);
1161  }
1162 
1163  drawtext(s->outpicref, outlink->w / 2 - 4 * 4, outlink->h - s->start_y / 2, "TIME", 0);
1164  drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 14 * 4, "FREQUENCY (Hz)", 1);
1165  } else {
1166  int w = s->mode == SEPARATE ? s->w / s->nb_display_channels : s->w;
1167  for (y = 0; y < s->h; y += 20) {
1168  dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
1169  dst[s->start_x - 2] = 200;
1170  dst[s->start_x + s->w + 1] = 200;
1171  }
1172  for (y = 0; y < s->h; y += 40) {
1173  dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
1174  dst[s->start_x - 3] = 200;
1175  dst[s->start_x + s->w + 2] = 200;
1176  }
1177  for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
1178  dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
1179  for (x = 0; x < w; x+=40)
1180  dst[x] = 200;
1181  dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x + w * ch;
1182  for (x = 0; x < w; x+=80)
1183  dst[x] = 200;
1184  dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x + w * ch;
1185  for (x = 0; x < w; x+=40) {
1186  dst[x] = 200;
1187  }
1188  dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
1189  for (x = 0; x < w; x+=80) {
1190  dst[x] = 200;
1191  }
1192  for (x = 0; x < w; x += 80) {
1193  float hertz = x * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(w)));
1194  char *units;
1195 
1196  if (hertz == 0)
1197  units = av_asprintf("DC");
1198  else
1199  units = av_asprintf("%.2f", hertz);
1200  if (!units)
1201  return AVERROR(ENOMEM);
1202 
1203  drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->start_y - 12, units, 0);
1204  drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->h + s->start_y + 6, units, 0);
1205  av_free(units);
1206  }
1207  }
1208  for (y = 0; y < s->h; y+=40) {
1209  float seconds = y * spp / inlink->sample_rate;
1210  char *units;
1211 
1212  if (x == 0)
1213  units = av_asprintf("0");
1214  else if (log10(seconds) > 6)
1215  units = av_asprintf("%.2fh", seconds / (60 * 60));
1216  else if (log10(seconds) > 3)
1217  units = av_asprintf("%.2fm", seconds / 60);
1218  else
1219  units = av_asprintf("%.2fs", seconds);
1220  if (!units)
1221  return AVERROR(ENOMEM);
1222 
1223  drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, s->start_y + y - 4, units, 0);
1224  av_free(units);
1225  }
1226  drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 4 * 4, "TIME", 1);
1227  drawtext(s->outpicref, outlink->w / 2 - 14 * 4, outlink->h - s->start_y / 2, "FREQUENCY (Hz)", 0);
1228  }
1229 
1230  for (ch = 0; ch < (multi ? s->nb_display_channels : 1); ch++) {
1231  int h = multi ? s->h / s->nb_display_channels : s->h;
1232 
1233  for (y = 0; y < h; y++) {
1234  float out[3] = { 0., 127.5, 127.5};
1235  int chn;
1236 
1237  for (chn = 0; chn < (s->mode == SEPARATE ? 1 : s->nb_display_channels); chn++) {
1238  float yf, uf, vf;
1239  int channel = (multi) ? s->nb_display_channels - ch - 1 : chn;
1240  float lout[3];
1241 
1242  color_range(s, channel, &yf, &uf, &vf);
1243  pick_color(s, yf, uf, vf, y / (float)h, lout);
1244  out[0] += lout[0];
1245  out[1] += lout[1];
1246  out[2] += lout[2];
1247  }
1248  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);
1249  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);
1250  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);
1251  }
1252 
1253  for (y = 0; ch == 0 && y < h; y += h / 10) {
1254  float value = 120.0 * log10(1. - y / (float)h);
1255  char *text;
1256 
1257  if (value < -120)
1258  break;
1259  text = av_asprintf("%.0f dB", value);
1260  if (!text)
1261  continue;
1262  drawtext(s->outpicref, s->w + s->start_x + 35, s->start_y + y - 5, text, 0);
1263  av_free(text);
1264  }
1265  }
1266  }
1267 
1268  ret = ff_filter_frame(outlink, s->outpicref);
1269  s->outpicref = NULL;
1270  }
1271 
1272  return ret;
1273 }
1274 
1275 static int showspectrumpic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
1276 {
1277  AVFilterContext *ctx = inlink->dst;
1278  ShowSpectrumContext *s = ctx->priv;
1279  int ret;
1280 
1281  ret = av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples);
1282  av_frame_free(&insamples);
1283  return ret;
1284 }
1285 
1286 static const AVFilterPad showspectrumpic_inputs[] = {
1287  {
1288  .name = "default",
1289  .type = AVMEDIA_TYPE_AUDIO,
1290  .filter_frame = showspectrumpic_filter_frame,
1291  },
1292  { NULL }
1293 };
1294 
1295 static const AVFilterPad showspectrumpic_outputs[] = {
1296  {
1297  .name = "default",
1298  .type = AVMEDIA_TYPE_VIDEO,
1299  .config_props = config_output,
1300  .request_frame = showspectrumpic_request_frame,
1301  },
1302  { NULL }
1303 };
1304 
1305 AVFilter ff_avf_showspectrumpic = {
1306  .name = "showspectrumpic",
1307  .description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output single picture."),
1308  .uninit = uninit,
1309  .query_formats = query_formats,
1310  .priv_size = sizeof(ShowSpectrumContext),
1311  .inputs = showspectrumpic_inputs,
1312  .outputs = showspectrumpic_outputs,
1313  .priv_class = &showspectrumpic_class,
1314  .flags = AVFILTER_FLAG_SLICE_THREADS,
1315 };
1316 
1317 #endif // CONFIG_SHOWSPECTRUMPIC_FILTER
plane
int plane
Definition: avisynth_c.h:422
AV_SAMPLE_FMT_FLTP
float, planar
Definition: samplefmt.h:69
NB_CLMODES
Definition: avf_showspectrum.c:47
WFUNC_DOLPH
Definition: window_func.h:32
NULL
#define NULL
Definition: coverity.c:32
WFUNC_PARZEN
Definition: window_func.h:32
s
const char * s
Definition: avisynth_c.h:768
FIERY
Definition: avf_showspectrum.c:47
av_audio_fifo_alloc
AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)
Allocate an AVAudioFifo.
Definition: audio_fifo.c:59
av_realloc_f
#define av_realloc_f(p, o, n)
Definition: tableprint_vlc.h:33
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:201
h
h
Definition: vp9dsp_template.c:2038
AVOption
AVOption.
Definition: opt.h:246
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
av_fft_end
av_cold void av_fft_end(FFTContext *s)
Definition: avfft.c:48
ShowSpectrumContext::rotation
float rotation
color rotation
Definition: avf_showspectrum.c:64
AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:67
avfilter.h
Main libavfilter public API header.
WFUNC_RECT
Definition: window_func.h:28
WFUNC_BHANN
Definition: window_func.h:31
AV_OPT_TYPE_INT
Definition: opt.h:223
ShowSpectrumContext::fft_data
FFTComplex ** fft_data
bins holder for each (displayed) channels
Definition: avf_showspectrum.c:69
av_audio_fifo_free
void av_audio_fifo_free(AVAudioFifo *af)
Free an AVAudioFifo.
Definition: audio_fifo.c:45
AV_SAMPLE_FMT_NONE
Definition: samplefmt.h:59
ShowSpectrumContext::window_func_lut
float * window_func_lut
Window function LUT.
Definition: avf_showspectrum.c:70
FFTComplex::re
FFTSample re
Definition: avfft.h:38
color_range
color_range
Definition: vf_selectivecolor.c:44
av_fft_permute
void av_fft_permute(FFTContext *s, FFTComplex *z)
Do the permutation needed BEFORE calling ff_fft_calc().
Definition: avfft.c:38
generate_window_func
static void generate_window_func(float *lut, int N, int win_func, float *overlap)
Definition: window_func.h:35
ShowSpectrumContext::fft_bits
int fft_bits
number of bits (FFT window size = 1<<fft_bits)
Definition: avf_showspectrum.c:68
query_formats
static int query_formats(AVFilterContext *ctx)
Definition: avf_showspectrum.c:263
ff_get_video_buffer
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.
Definition: video.c:92
drawtext
static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
Definition: avf_showvolume.c:175
ShowSpectrumContext::sliding
int sliding
1 if sliding mode, 0 otherwise
Definition: avf_showspectrum.c:59
MORELAND
Definition: avf_showspectrum.c:47
D_MAGNITUDE
Definition: avf_showspectrum.c:45
ShowSpectrumContext::mode
int mode
channel display mode
Definition: avf_showspectrum.c:60
log2
#define log2(x)
Definition: libm.h:404
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
Definition: mem.c:230
ff_make_format_list
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:283
DisplayScale
DisplayScale
Definition: avf_ahistogram.c:30
WFUNC_HANNING
Definition: window_func.h:28
NB_MODES
Definition: avf_showspectrum.c:44
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:60
AVFilterContext::inputs
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:346
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AV_OPT_TYPE_CONST
Definition: opt.h:232
ff_channel_layouts_ref
int ff_channel_layouts_ref(AVFilterChannelLayouts *f, AVFilterChannelLayouts **ref)
Add *ref as a new reference to f.
Definition: formats.c:435
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1151
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
COOL
Definition: avf_showspectrum.c:47
showspectrum_options
static const AVOption showspectrum_options[]
Definition: avf_showspectrum.c:91
opt.h
AVOptions.
calc_channel_magnitudes
static int calc_channel_magnitudes(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: avf_showspectrum.c:493
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
ch
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_X86ASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){intplanes=out->planar?out->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
WFUNC_GAUSS
Definition: window_func.h:31
AVFrame::pts
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:294
NEBULAE
Definition: avf_showspectrum.c:47
FULLFRAME
Definition: avf_showspectrum.c:48
WFUNC_BLACKMAN
Definition: af_firequalizer.c:36
RSCROLL
Definition: avf_showspectrum.c:48
run_channel_fft
static int run_channel_fft(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: avf_showspectrum.c:465
calc_channel_phases
static int calc_channel_phases(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: avf_showspectrum.c:508
flags
static int flags
Definition: log.c:57
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
lrintf
#define lrintf(x)
Definition: libm_mips.h:70
HORIZONTAL
Definition: avf_showspectrum.c:49
WFUNC_HAMMING
Definition: af_firequalizer.c:35
size
ptrdiff_t size
Definition: opengl_enc.c:101
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
SlideMode
SlideMode
Definition: avf_ahistogram.c:32
cm
#define cm
Definition: dvbsubdec.c:37
WFUNC_BHARRIS
Definition: af_firequalizer.c:41
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:54
plot_channel
static int plot_channel(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
Definition: avf_showspectrum.c:659
D_PHASE
Definition: avf_showspectrum.c:45
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
PHASE
#define PHASE(y, ch)
Definition: avf_showspectrum.c:491
avpriv_cga_font
const uint8_t avpriv_cga_font[2048]
Definition: xga_font_data.c:29
SEPARATE
Definition: avf_showspectrum.c:44
WFUNC_NUTTALL
Definition: af_firequalizer.c:39
ff_get_audio_buffer
AVFrame * ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
Request an audio samples buffer with a specific set of permissions.
Definition: audio.c:86
mask
static const uint16_t mask[17]
Definition: lzw.c:38
SQRT
Definition: avf_showspectrum.c:46
AVERROR
#define AVERROR(e)
Definition: error.h:43
FIRE
Definition: avf_showspectrum.c:47
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:163
AV_OPT_TYPE_FLOAT
Definition: opt.h:226
WFUNC_LANCZOS
Definition: window_func.h:31
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
ShowSpectrumContext::color_buffer
float ** color_buffer
color buffer (3 * h * ch items)
Definition: avf_showspectrum.c:80
WFUNC_SINE
Definition: window_func.h:30
AVFilterContext::priv
void * priv
private data for use by the filter
Definition: avfilter.h:353
AVFrame::color_range
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: frame.h:446
AVFILTER_FLAG_SLICE_THREADS
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
Definition: avfilter.h:116
ShowSpectrumContext::saturation
float saturation
color saturation multiplier
Definition: avf_showspectrum.c:63
cbrt
#define cbrt
Definition: tablegen.h:35
arg
const char * arg
Definition: jacosubdec.c:66
ShowSpectrumContext::combine_buffer
float * combine_buffer
color combining buffer (3 * h items)
Definition: avf_showspectrum.c:79
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
VERTICAL
Definition: avf_showspectrum.c:49
av_fft_init
FFTContext * av_fft_init(int nbits, int inverse)
Set up a complex FFT.
Definition: avfft.c:28
NB_SLIDES
Definition: avf_showspectrum.c:48
FFMAX
#define FFMAX(a, b)
Definition: common.h:94
fail
#define fail()
Definition: checkasm.h:109
CBRT
Definition: avf_showspectrum.c:46
AVAudioFifo
Context for an Audio FIFO Buffer.
Definition: audio_fifo.c:34
av_asprintf
char * av_asprintf(const char *fmt,...)
Definition: avstring.c:113
INTENSITY
Definition: avf_showspectrum.c:47
REPLACE
Definition: avf_showspectrum.c:48
av_audio_fifo_size
int av_audio_fifo_size(AVAudioFifo *af)
Get the current number of samples in the AVAudioFifo available for reading.
Definition: audio_fifo.c:228
FFTContext
Definition: fft.h:88
channel_layout.h
audio channel layout utility functions
request_frame
static int request_frame(AVFilterLink *outlink)
Definition: aeval.c:274
ff_formats_ref
int ff_formats_ref(AVFilterFormats *f, AVFilterFormats **ref)
Add *ref as a new reference to formats.
Definition: formats.c:440
value
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
M_PI_2
#define M_PI_2
Definition: mathematics.h:55
ctx
AVFormatContext * ctx
Definition: movenc.c:48
AV_OPT_TYPE_BOOL
Definition: opt.h:240
COMBINED
Definition: avf_showspectrum.c:44
ColorMode
ColorMode
Definition: avf_showspectrum.c:47
acalc_magnitudes
static void acalc_magnitudes(ShowSpectrumContext *s)
Definition: avf_showspectrum.c:522
WFUNC_TUKEY
Definition: af_firequalizer.c:42
FLAGS
#define FLAGS
Definition: avf_showspectrum.c:89
n
int n
Definition: avisynth_c.h:684
MAGNITUDE
#define MAGNITUDE(y, ch)
Definition: avf_showspectrum.c:490
outputs
static const AVFilterPad outputs[]
Definition: af_afftfilt.c:389
WFUNC_POISSON
Definition: window_func.h:32
ff_all_channel_layouts
AVFilterChannelLayouts * ff_all_channel_layouts(void)
Construct an empty AVFilterChannelLayouts/AVFilterFormats struct – representing any channel layout (w...
Definition: formats.c:401
av_frame_clone
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:492
FF_ARRAY_ELEMS
#define FF_ARRAY_ELEMS(a)
Definition: sinewin_tablegen_template.c:36
AVCOL_RANGE_JPEG
the normal 2^n-1 "JPEG" YUV ranges
Definition: pixfmt.h:510
AVFilterChannelLayouts
A list of supported channel layouts.
Definition: formats.h:85
Orientation
Orientation
Definition: avf_showspectrum.c:49
inputs
static const AVFilterPad inputs[]
Definition: af_afftfilt.c:379
config_output
static int config_output(AVFilterLink *outlink)
Definition: avf_showspectrum.c:294
color_range
static void color_range(ShowSpectrumContext *s, int ch, float *yf, float *uf, float *vf)
Definition: avf_showspectrum.c:548
AVSampleFormat
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
color_table
static const struct ColorTable color_table[][8]
SCROLL
Definition: avf_showspectrum.c:48
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:232
av_make_q
static AVRational av_make_q(int num, int den)
Create an AVRational.
Definition: rational.h:71
avfft.h
FFT functions.
AVFrame::sample_aspect_ratio
AVRational sample_aspect_ratio
Sample aspect ratio for the video frame, 0/1 if unknown/unspecified.
Definition: frame.h:289
WFUNC_FLATTOP
Definition: window_func.h:29
FIFTHRT
Definition: avf_showspectrum.c:46
NB_ORIENTATIONS
Definition: avf_showspectrum.c:49
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:67
AVFilter
Filter definition.
Definition: avfilter.h:144
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(showspectrum)
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
WFUNC_BNUTTALL
Definition: af_firequalizer.c:40
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:148
u
#define u(width,...)
Definition: vaapi_encode_h26x.h:36
AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:233
DataMode
DataMode
Definition: avf_showspectrum.c:45
AVFilterContext::outputs
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:350
layouts
enum MovChannelLayoutTag * layouts
Definition: mov_chan.c:434
pix_fmts
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:266
ff_all_samplerates
AVFilterFormats * ff_all_samplerates(void)
Definition: formats.c:395
av_frame_make_writable
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:560
AVFilterContext::internal
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
Definition: avfilter.h:378
WFUNC_WELCH
Definition: window_func.h:29
filter_frame
static int filter_frame(DBEContext *s, AVFrame *frame)
Definition: dolby_e.c:565
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:215
av_audio_fifo_write
int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)
Write data to an AVAudioFifo.
Definition: audio_fifo.c:112
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: avf_showspectrum.c:227
av_audio_fifo_drain
int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)
Drain data from an AVAudioFifo.
Definition: audio_fifo.c:201
WFUNC_CAUCHY
Definition: window_func.h:32
CHANNEL
Definition: avf_showspectrum.c:47
plot_spectrum_column
static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
Definition: avf_showspectrum.c:721
int
int
Definition: ffmpeg_filter.c:190
FFTComplex::im
FFTSample im
Definition: avfft.h:38
if
if(ret< 0)
Definition: vf_mcdeint.c:279
channel
channel
Use these values when setting the channel map with ebur128_set_channel().
Definition: ebur128.h:39
ShowSpectrumContext::fft
FFTContext ** fft
Fast Fourier Transform context.
Definition: avf_showspectrum.c:67
AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:76
FRUIT
Definition: avf_showspectrum.c:47
RAINBOW
Definition: avf_showspectrum.c:47
AVRational::den
int den
Denominator.
Definition: rational.h:60
AVFilterInternal::execute
avfilter_execute_func * execute
Definition: internal.h:155
FOURTHRT
Definition: avf_showspectrum.c:46
av_free
#define av_free(p)
Definition: tableprint_vlc.h:34
audio_fifo.h
Audio FIFO Buffer.
NB_SCALES
Definition: avf_showspectrum.c:46
window_func.h
AVFilterFormats
A list of supported formats for one end of a filter link.
Definition: formats.h:64
av_audio_fifo_peek
int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)
Peek data from an AVAudioFifo.
Definition: audio_fifo.c:138
NB_DMODES
Definition: avf_showspectrum.c:45
AVFilterContext
An instance of a filter.
Definition: avfilter.h:338
sample_fmts
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
OFFSET
#define OFFSET(x)
Definition: avf_showspectrum.c:88
out
FILE * out
Definition: movenc.c:54
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
start
void INT64 start
Definition: avisynth_c.h:690
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
M_PI
#define M_PI
Definition: mathematics.h:52
scale_magnitudes
static void scale_magnitudes(ShowSpectrumContext *s, float scale)
Definition: avf_showspectrum.c:536
ff_request_frame
int ff_request_frame(AVFilterLink *link)
Request an input frame from the filter at the other end of the link.
Definition: avfilter.c:405
formats
formats
Definition: signature.h:48
LINEAR
Definition: avf_showspectrum.c:46
LOG
Definition: avf_showspectrum.c:46
pick_color
static void pick_color(ShowSpectrumContext *s, float yf, float uf, float vf, float a, float *out)
Definition: avf_showspectrum.c:604
internal.h
internal API functions
NB_WFUNC
Definition: af_firequalizer.c:43
AVFrame::extended_data
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:248
ShowSpectrumContext::xpos
int xpos
x position (current column)
Definition: avf_showspectrum.c:66
av_fft_calc
void av_fft_calc(FFTContext *s, FFTComplex *z)
Do a complex FFT with the parameters defined in av_fft_init().
Definition: avfft.c:43
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:60
clear_combine_buffer
static void clear_combine_buffer(ShowSpectrumContext *s, int size)
Definition: avf_showspectrum.c:648
mode
mode
Use these values in ebur128_init (or'ed).
Definition: ebur128.h:83
AVFrame::nb_samples
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:267
AVFilterContext::filter
const AVFilter * filter
the AVFilter of which this is an instance
Definition: avfilter.h:341
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:248
xga_font_data.h
CGA/EGA/VGA ROM font data.
WFUNC_BARTLETT
Definition: window_func.h:29
ShowSpectrumContext::color_mode
int color_mode
display color scheme
Definition: avf_showspectrum.c:61
a
a
Definition: h264pred_template.c:468
DisplayMode
DisplayMode
Definition: avf_ahistogram.c:33
Generated on Fri Jan 12 2018 01:47:55 for FFmpeg by   doxygen 1.8.6