1166 lines
50 KiB
C
1166 lines
50 KiB
C
/*
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* Copyright (c) 2012-2013 Clément Bœsch
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* Copyright (c) 2013 Rudolf Polzer <divverent@xonotic.org>
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* Copyright (c) 2015 Paul B Mahol
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* audio to spectrum (video) transmedia filter, based on ffplay rdft showmode
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* (by Michael Niedermayer) and lavfi/avf_showwaves (by Stefano Sabatini).
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*/
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#include <math.h>
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#include "libavcodec/avfft.h"
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#include "libavutil/audio_fifo.h"
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/opt.h"
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#include "libavutil/xga_font_data.h"
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#include "audio.h"
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#include "video.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "window_func.h"
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enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
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enum DisplayScale { LINEAR, SQRT, CBRT, LOG, FOURTHRT, FIFTHRT, NB_SCALES };
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enum ColorMode { CHANNEL, INTENSITY, RAINBOW, MORELAND, NEBULAE, FIRE, FIERY, FRUIT, NB_CLMODES };
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enum SlideMode { REPLACE, SCROLL, FULLFRAME, RSCROLL, NB_SLIDES };
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enum Orientation { VERTICAL, HORIZONTAL, NB_ORIENTATIONS };
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typedef struct {
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const AVClass *class;
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int w, h;
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AVFrame *outpicref;
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int nb_display_channels;
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int orientation;
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int channel_width;
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int channel_height;
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int sliding; ///< 1 if sliding mode, 0 otherwise
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int mode; ///< channel display mode
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int color_mode; ///< display color scheme
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int scale;
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float saturation; ///< color saturation multiplier
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int xpos; ///< x position (current column)
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FFTContext *fft; ///< Fast Fourier Transform context
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int fft_bits; ///< number of bits (FFT window size = 1<<fft_bits)
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FFTComplex **fft_data; ///< bins holder for each (displayed) channels
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float *window_func_lut; ///< Window function LUT
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float **magnitudes;
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int win_func;
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int win_size;
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double win_scale;
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float overlap;
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float gain;
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int skip_samples;
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float *combine_buffer; ///< color combining buffer (3 * h items)
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AVAudioFifo *fifo;
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int64_t pts;
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int single_pic;
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int legend;
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int start_x, start_y;
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} ShowSpectrumContext;
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#define OFFSET(x) offsetof(ShowSpectrumContext, x)
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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static const AVOption showspectrum_options[] = {
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{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
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{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "640x512"}, 0, 0, FLAGS },
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{ "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_SLIDES-1, FLAGS, "slide" },
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{ "replace", "replace old columns with new", 0, AV_OPT_TYPE_CONST, {.i64=REPLACE}, 0, 0, FLAGS, "slide" },
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{ "scroll", "scroll from right to left", 0, AV_OPT_TYPE_CONST, {.i64=SCROLL}, 0, 0, FLAGS, "slide" },
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{ "rscroll", "scroll from left to right", 0, AV_OPT_TYPE_CONST, {.i64=RSCROLL}, 0, 0, FLAGS, "slide" },
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{ "fullframe", "return full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, FLAGS, "slide" },
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{ "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, COMBINED, NB_MODES-1, FLAGS, "mode" },
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{ "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "mode" },
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{ "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "mode" },
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{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=CHANNEL}, CHANNEL, NB_CLMODES-1, FLAGS, "color" },
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{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" },
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{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" },
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{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" },
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{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" },
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{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" },
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{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" },
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{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" },
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{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" },
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{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=SQRT}, LINEAR, NB_SCALES-1, FLAGS, "scale" },
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{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
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{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
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{ "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" },
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{ "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" },
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{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
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{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
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{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
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{ "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
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{ "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" },
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{ "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },
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{ "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
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{ "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
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{ "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" },
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{ "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
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{ "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" },
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{ "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" },
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{ "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" },
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{ "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" },
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{ "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" },
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{ "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" },
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{ "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" },
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{ "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" },
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{ "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" },
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{ "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" },
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{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" },
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{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" },
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{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" },
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{ "overlap", "set window overlap", OFFSET(overlap), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, 1, FLAGS },
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{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(showspectrum);
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static const struct ColorTable {
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float a, y, u, v;
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} color_table[][8] = {
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[INTENSITY] = {
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{ 0, 0, 0, 0 },
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{ 0.13, .03587126228984074, .1573300977624594, -.02548747583751842 },
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{ 0.30, .18572281794568020, .1772436246393981, .17475554840414750 },
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{ 0.60, .28184980583656130, -.1593064119945782, .47132074554608920 },
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{ 0.73, .65830621175547810, -.3716070802232764, .24352759331252930 },
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{ 0.78, .76318535758242900, -.4307467689263783, .16866496622310430 },
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{ 0.91, .95336363636363640, -.2045454545454546, .03313636363636363 },
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{ 1, 1, 0, 0 }},
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[RAINBOW] = {
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{ 0, 0, 0, 0 },
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{ 0.13, 44/256., (189-128)/256., (138-128)/256. },
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{ 0.25, 29/256., (186-128)/256., (119-128)/256. },
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{ 0.38, 119/256., (194-128)/256., (53-128)/256. },
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{ 0.60, 111/256., (73-128)/256., (59-128)/256. },
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{ 0.73, 205/256., (19-128)/256., (149-128)/256. },
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{ 0.86, 135/256., (83-128)/256., (200-128)/256. },
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{ 1, 73/256., (95-128)/256., (225-128)/256. }},
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[MORELAND] = {
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{ 0, 44/256., (181-128)/256., (112-128)/256. },
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{ 0.13, 126/256., (177-128)/256., (106-128)/256. },
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{ 0.25, 164/256., (163-128)/256., (109-128)/256. },
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{ 0.38, 200/256., (140-128)/256., (120-128)/256. },
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{ 0.60, 201/256., (117-128)/256., (141-128)/256. },
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{ 0.73, 177/256., (103-128)/256., (165-128)/256. },
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{ 0.86, 136/256., (100-128)/256., (183-128)/256. },
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{ 1, 68/256., (117-128)/256., (203-128)/256. }},
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[NEBULAE] = {
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{ 0, 10/256., (134-128)/256., (132-128)/256. },
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{ 0.23, 21/256., (137-128)/256., (130-128)/256. },
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{ 0.45, 35/256., (134-128)/256., (134-128)/256. },
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{ 0.57, 51/256., (130-128)/256., (139-128)/256. },
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{ 0.67, 104/256., (116-128)/256., (162-128)/256. },
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{ 0.77, 120/256., (105-128)/256., (188-128)/256. },
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{ 0.87, 140/256., (105-128)/256., (188-128)/256. },
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{ 1, 1, 0, 0 }},
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[FIRE] = {
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{ 0, 0, 0, 0 },
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{ 0.23, 44/256., (132-128)/256., (127-128)/256. },
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{ 0.45, 62/256., (116-128)/256., (140-128)/256. },
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{ 0.57, 75/256., (105-128)/256., (152-128)/256. },
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{ 0.67, 95/256., (91-128)/256., (166-128)/256. },
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{ 0.77, 126/256., (74-128)/256., (172-128)/256. },
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{ 0.87, 164/256., (73-128)/256., (162-128)/256. },
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{ 1, 1, 0, 0 }},
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[FIERY] = {
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{ 0, 0, 0, 0 },
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{ 0.23, 36/256., (116-128)/256., (163-128)/256. },
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{ 0.45, 52/256., (102-128)/256., (200-128)/256. },
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{ 0.57, 116/256., (84-128)/256., (196-128)/256. },
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{ 0.67, 157/256., (67-128)/256., (181-128)/256. },
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{ 0.77, 193/256., (40-128)/256., (155-128)/256. },
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{ 0.87, 221/256., (101-128)/256., (134-128)/256. },
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{ 1, 1, 0, 0 }},
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[FRUIT] = {
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{ 0, 0, 0, 0 },
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{ 0.20, 29/256., (136-128)/256., (119-128)/256. },
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{ 0.30, 60/256., (119-128)/256., (90-128)/256. },
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{ 0.40, 85/256., (91-128)/256., (85-128)/256. },
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{ 0.50, 116/256., (70-128)/256., (105-128)/256. },
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{ 0.60, 151/256., (50-128)/256., (146-128)/256. },
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{ 0.70, 191/256., (63-128)/256., (178-128)/256. },
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{ 1, 98/256., (80-128)/256., (221-128)/256. }},
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};
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static av_cold void uninit(AVFilterContext *ctx)
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{
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ShowSpectrumContext *s = ctx->priv;
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int i;
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av_freep(&s->combine_buffer);
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av_fft_end(s->fft);
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if (s->fft_data) {
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for (i = 0; i < s->nb_display_channels; i++)
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av_freep(&s->fft_data[i]);
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}
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av_freep(&s->fft_data);
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av_freep(&s->window_func_lut);
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if (s->magnitudes) {
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for (i = 0; i < s->nb_display_channels; i++)
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av_freep(&s->magnitudes[i]);
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}
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av_freep(&s->magnitudes);
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av_frame_free(&s->outpicref);
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av_audio_fifo_free(s->fifo);
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}
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static int query_formats(AVFilterContext *ctx)
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{
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AVFilterFormats *formats = NULL;
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AVFilterChannelLayouts *layouts = NULL;
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AVFilterLink *inlink = ctx->inputs[0];
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AVFilterLink *outlink = ctx->outputs[0];
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_FLTP, AV_SAMPLE_FMT_NONE };
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE };
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int ret;
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/* set input audio formats */
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formats = ff_make_format_list(sample_fmts);
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if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)
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return ret;
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layouts = ff_all_channel_layouts();
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if ((ret = ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts)) < 0)
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return ret;
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formats = ff_all_samplerates();
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if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
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return ret;
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/* set output video format */
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formats = ff_make_format_list(pix_fmts);
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if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
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return ret;
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return 0;
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}
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static int config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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AVFilterLink *inlink = ctx->inputs[0];
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ShowSpectrumContext *s = ctx->priv;
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int i, fft_bits, h, w;
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float overlap;
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if (!strcmp(ctx->filter->name, "showspectrumpic"))
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s->single_pic = 1;
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outlink->w = s->w;
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outlink->h = s->h;
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if (s->legend) {
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s->start_x = log10(inlink->sample_rate) * 25;
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s->start_y = 64;
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outlink->w += s->start_x * 2;
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outlink->h += s->start_y * 2;
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}
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h = (s->mode == COMBINED || s->orientation == HORIZONTAL) ? s->h : s->h / inlink->channels;
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w = (s->mode == COMBINED || s->orientation == VERTICAL) ? s->w : s->w / inlink->channels;
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s->channel_height = h;
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s->channel_width = w;
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if (s->orientation == VERTICAL) {
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/* FFT window size (precision) according to the requested output frame height */
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for (fft_bits = 1; 1 << fft_bits < 2 * h; fft_bits++);
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} else {
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/* FFT window size (precision) according to the requested output frame width */
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for (fft_bits = 1; 1 << fft_bits < 2 * w; fft_bits++);
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}
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s->win_size = 1 << fft_bits;
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/* (re-)configuration if the video output changed (or first init) */
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if (fft_bits != s->fft_bits) {
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AVFrame *outpicref;
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av_fft_end(s->fft);
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s->fft = av_fft_init(fft_bits, 0);
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if (!s->fft) {
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av_log(ctx, AV_LOG_ERROR, "Unable to create FFT context. "
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"The window size might be too high.\n");
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return AVERROR(EINVAL);
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}
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s->fft_bits = fft_bits;
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/* FFT buffers: x2 for each (display) channel buffer.
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* Note: we use free and malloc instead of a realloc-like function to
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* make sure the buffer is aligned in memory for the FFT functions. */
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for (i = 0; i < s->nb_display_channels; i++)
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av_freep(&s->fft_data[i]);
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av_freep(&s->fft_data);
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s->nb_display_channels = inlink->channels;
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s->magnitudes = av_calloc(s->nb_display_channels, sizeof(*s->magnitudes));
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if (!s->magnitudes)
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return AVERROR(ENOMEM);
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for (i = 0; i < s->nb_display_channels; i++) {
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s->magnitudes[i] = av_calloc(s->orientation == VERTICAL ? s->h : s->w, sizeof(**s->magnitudes));
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if (!s->magnitudes[i])
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return AVERROR(ENOMEM);
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}
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s->fft_data = av_calloc(s->nb_display_channels, sizeof(*s->fft_data));
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if (!s->fft_data)
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return AVERROR(ENOMEM);
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for (i = 0; i < s->nb_display_channels; i++) {
|
|
s->fft_data[i] = av_calloc(s->win_size, sizeof(**s->fft_data));
|
|
if (!s->fft_data[i])
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
/* pre-calc windowing function */
|
|
s->window_func_lut =
|
|
av_realloc_f(s->window_func_lut, s->win_size,
|
|
sizeof(*s->window_func_lut));
|
|
if (!s->window_func_lut)
|
|
return AVERROR(ENOMEM);
|
|
ff_generate_window_func(s->window_func_lut, s->win_size, s->win_func, &overlap);
|
|
if (s->overlap == 1)
|
|
s->overlap = overlap;
|
|
s->skip_samples = (1. - s->overlap) * s->win_size;
|
|
if (s->skip_samples < 1) {
|
|
av_log(ctx, AV_LOG_ERROR, "overlap %f too big\n", s->overlap);
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
for (s->win_scale = 0, i = 0; i < s->win_size; i++) {
|
|
s->win_scale += s->window_func_lut[i] * s->window_func_lut[i];
|
|
}
|
|
s->win_scale = 1. / sqrt(s->win_scale);
|
|
|
|
/* prepare the initial picref buffer (black frame) */
|
|
av_frame_free(&s->outpicref);
|
|
s->outpicref = outpicref =
|
|
ff_get_video_buffer(outlink, outlink->w, outlink->h);
|
|
if (!outpicref)
|
|
return AVERROR(ENOMEM);
|
|
outlink->sample_aspect_ratio = (AVRational){1,1};
|
|
for (i = 0; i < outlink->h; i++) {
|
|
memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
|
|
memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
|
|
memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
|
|
}
|
|
}
|
|
|
|
if ((s->orientation == VERTICAL && s->xpos >= s->w) ||
|
|
(s->orientation == HORIZONTAL && s->xpos >= s->h))
|
|
s->xpos = 0;
|
|
|
|
outlink->frame_rate = av_make_q(inlink->sample_rate, s->win_size * (1.-s->overlap));
|
|
if (s->orientation == VERTICAL && s->sliding == FULLFRAME)
|
|
outlink->frame_rate.den *= s->w;
|
|
if (s->orientation == HORIZONTAL && s->sliding == FULLFRAME)
|
|
outlink->frame_rate.den *= s->h;
|
|
|
|
if (s->orientation == VERTICAL) {
|
|
s->combine_buffer =
|
|
av_realloc_f(s->combine_buffer, s->h * 3,
|
|
sizeof(*s->combine_buffer));
|
|
} else {
|
|
s->combine_buffer =
|
|
av_realloc_f(s->combine_buffer, s->w * 3,
|
|
sizeof(*s->combine_buffer));
|
|
}
|
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d FFT window size:%d\n",
|
|
s->w, s->h, s->win_size);
|
|
|
|
av_audio_fifo_free(s->fifo);
|
|
s->fifo = av_audio_fifo_alloc(inlink->format, inlink->channels, s->win_size);
|
|
if (!s->fifo)
|
|
return AVERROR(ENOMEM);
|
|
return 0;
|
|
}
|
|
|
|
static void run_fft(ShowSpectrumContext *s, AVFrame *fin)
|
|
{
|
|
int ch, n;
|
|
|
|
/* fill FFT input with the number of samples available */
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
const float *p = (float *)fin->extended_data[ch];
|
|
|
|
for (n = 0; n < s->win_size; n++) {
|
|
s->fft_data[ch][n].re = p[n] * s->window_func_lut[n];
|
|
s->fft_data[ch][n].im = 0;
|
|
}
|
|
}
|
|
|
|
/* run FFT on each samples set */
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
av_fft_permute(s->fft, s->fft_data[ch]);
|
|
av_fft_calc(s->fft, s->fft_data[ch]);
|
|
}
|
|
}
|
|
|
|
#define RE(y, ch) s->fft_data[ch][y].re
|
|
#define IM(y, ch) s->fft_data[ch][y].im
|
|
#define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, ch))
|
|
|
|
static void calc_magnitudes(ShowSpectrumContext *s)
|
|
{
|
|
int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
|
|
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
float *magnitudes = s->magnitudes[ch];
|
|
|
|
for (y = 0; y < h; y++)
|
|
magnitudes[y] = MAGNITUDE(y, ch);
|
|
}
|
|
}
|
|
|
|
static void acalc_magnitudes(ShowSpectrumContext *s)
|
|
{
|
|
int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
|
|
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
float *magnitudes = s->magnitudes[ch];
|
|
|
|
for (y = 0; y < h; y++)
|
|
magnitudes[y] += MAGNITUDE(y, ch);
|
|
}
|
|
}
|
|
|
|
static void scale_magnitudes(ShowSpectrumContext *s, float scale)
|
|
{
|
|
int ch, y, h = s->orientation == VERTICAL ? s->h : s->w;
|
|
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
float *magnitudes = s->magnitudes[ch];
|
|
|
|
for (y = 0; y < h; y++)
|
|
magnitudes[y] *= scale;
|
|
}
|
|
}
|
|
|
|
static void color_range(ShowSpectrumContext *s, int ch,
|
|
float *yf, float *uf, float *vf)
|
|
{
|
|
switch (s->mode) {
|
|
case COMBINED:
|
|
// reduce range by channel count
|
|
*yf = 256.0f / s->nb_display_channels;
|
|
switch (s->color_mode) {
|
|
case RAINBOW:
|
|
case MORELAND:
|
|
case NEBULAE:
|
|
case FIRE:
|
|
case FIERY:
|
|
case FRUIT:
|
|
case INTENSITY:
|
|
*uf = *yf;
|
|
*vf = *yf;
|
|
break;
|
|
case CHANNEL:
|
|
/* adjust saturation for mixed UV coloring */
|
|
/* this factor is correct for infinite channels, an approximation otherwise */
|
|
*uf = *yf * M_PI;
|
|
*vf = *yf * M_PI;
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
break;
|
|
case SEPARATE:
|
|
// full range
|
|
*yf = 256.0f;
|
|
*uf = 256.0f;
|
|
*vf = 256.0f;
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
|
|
if (s->color_mode == CHANNEL) {
|
|
if (s->nb_display_channels > 1) {
|
|
*uf *= 0.5 * sin((2 * M_PI * ch) / s->nb_display_channels);
|
|
*vf *= 0.5 * cos((2 * M_PI * ch) / s->nb_display_channels);
|
|
} else {
|
|
*uf = 0.0f;
|
|
*vf = 0.0f;
|
|
}
|
|
}
|
|
*uf *= s->saturation;
|
|
*vf *= s->saturation;
|
|
}
|
|
|
|
static void pick_color(ShowSpectrumContext *s,
|
|
float yf, float uf, float vf,
|
|
float a, float *out)
|
|
{
|
|
if (s->color_mode > CHANNEL) {
|
|
const int cm = s->color_mode;
|
|
float y, u, v;
|
|
int i;
|
|
|
|
for (i = 1; i < FF_ARRAY_ELEMS(color_table[cm]) - 1; i++)
|
|
if (color_table[cm][i].a >= a)
|
|
break;
|
|
// i now is the first item >= the color
|
|
// now we know to interpolate between item i - 1 and i
|
|
if (a <= color_table[cm][i - 1].a) {
|
|
y = color_table[cm][i - 1].y;
|
|
u = color_table[cm][i - 1].u;
|
|
v = color_table[cm][i - 1].v;
|
|
} else if (a >= color_table[cm][i].a) {
|
|
y = color_table[cm][i].y;
|
|
u = color_table[cm][i].u;
|
|
v = color_table[cm][i].v;
|
|
} else {
|
|
float start = color_table[cm][i - 1].a;
|
|
float end = color_table[cm][i].a;
|
|
float lerpfrac = (a - start) / (end - start);
|
|
y = color_table[cm][i - 1].y * (1.0f - lerpfrac)
|
|
+ color_table[cm][i].y * lerpfrac;
|
|
u = color_table[cm][i - 1].u * (1.0f - lerpfrac)
|
|
+ color_table[cm][i].u * lerpfrac;
|
|
v = color_table[cm][i - 1].v * (1.0f - lerpfrac)
|
|
+ color_table[cm][i].v * lerpfrac;
|
|
}
|
|
|
|
out[0] += y * yf;
|
|
out[1] += u * uf;
|
|
out[2] += v * vf;
|
|
} else {
|
|
out[0] += a * yf;
|
|
out[1] += a * uf;
|
|
out[2] += a * vf;
|
|
}
|
|
}
|
|
|
|
static void clear_combine_buffer(ShowSpectrumContext *s, int size)
|
|
{
|
|
int y;
|
|
|
|
for (y = 0; y < size; y++) {
|
|
s->combine_buffer[3 * y ] = 0;
|
|
s->combine_buffer[3 * y + 1] = 127.5;
|
|
s->combine_buffer[3 * y + 2] = 127.5;
|
|
}
|
|
}
|
|
|
|
static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
|
|
{
|
|
int ret;
|
|
AVFilterContext *ctx = inlink->dst;
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
|
ShowSpectrumContext *s = ctx->priv;
|
|
AVFrame *outpicref = s->outpicref;
|
|
const double w = s->win_scale;
|
|
const float g = s->gain;
|
|
int h = s->orientation == VERTICAL ? s->channel_height : s->channel_width;
|
|
|
|
int ch, plane, x, y;
|
|
|
|
/* fill a new spectrum column */
|
|
/* initialize buffer for combining to black */
|
|
clear_combine_buffer(s, s->orientation == VERTICAL ? s->h : s->w);
|
|
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
float *magnitudes = s->magnitudes[ch];
|
|
float yf, uf, vf;
|
|
|
|
/* decide color range */
|
|
color_range(s, ch, &yf, &uf, &vf);
|
|
|
|
/* draw the channel */
|
|
for (y = 0; y < h; y++) {
|
|
int row = (s->mode == COMBINED) ? y : ch * h + y;
|
|
float *out = &s->combine_buffer[3 * row];
|
|
|
|
/* get magnitude */
|
|
float a = g * w * magnitudes[y];
|
|
|
|
/* apply scale */
|
|
switch (s->scale) {
|
|
case LINEAR:
|
|
break;
|
|
case SQRT:
|
|
a = sqrt(a);
|
|
break;
|
|
case CBRT:
|
|
a = cbrt(a);
|
|
break;
|
|
case FOURTHRT:
|
|
a = sqrt(sqrt(a));
|
|
break;
|
|
case FIFTHRT:
|
|
a = pow(a, 0.20);
|
|
break;
|
|
case LOG:
|
|
a = 1 + log10(av_clipd(a * w, 1e-6, 1)) / 6; // zero = -120dBFS
|
|
break;
|
|
default:
|
|
av_assert0(0);
|
|
}
|
|
|
|
pick_color(s, yf, uf, vf, a, out);
|
|
}
|
|
}
|
|
|
|
av_frame_make_writable(s->outpicref);
|
|
/* copy to output */
|
|
if (s->orientation == VERTICAL) {
|
|
if (s->sliding == SCROLL) {
|
|
for (plane = 0; plane < 3; plane++) {
|
|
for (y = 0; y < s->h; y++) {
|
|
uint8_t *p = outpicref->data[plane] +
|
|
y * outpicref->linesize[plane];
|
|
memmove(p, p + 1, s->w - 1);
|
|
}
|
|
}
|
|
s->xpos = s->w - 1;
|
|
} else if (s->sliding == RSCROLL) {
|
|
for (plane = 0; plane < 3; plane++) {
|
|
for (y = 0; y < s->h; y++) {
|
|
uint8_t *p = outpicref->data[plane] +
|
|
y * outpicref->linesize[plane];
|
|
memmove(p + 1, p, s->w - 1);
|
|
}
|
|
}
|
|
s->xpos = 0;
|
|
}
|
|
for (plane = 0; plane < 3; plane++) {
|
|
uint8_t *p = outpicref->data[plane] + s->start_x +
|
|
(outlink->h - 1 - s->start_y) * outpicref->linesize[plane] +
|
|
s->xpos;
|
|
for (y = 0; y < s->h; y++) {
|
|
*p = lrintf(av_clipf(s->combine_buffer[3 * y + plane], 0, 255));
|
|
p -= outpicref->linesize[plane];
|
|
}
|
|
}
|
|
} else {
|
|
if (s->sliding == SCROLL) {
|
|
for (plane = 0; plane < 3; plane++) {
|
|
for (y = 1; y < s->h; y++) {
|
|
memmove(outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
|
|
outpicref->data[plane] + (y ) * outpicref->linesize[plane],
|
|
s->w);
|
|
}
|
|
}
|
|
s->xpos = s->h - 1;
|
|
} else if (s->sliding == RSCROLL) {
|
|
for (plane = 0; plane < 3; plane++) {
|
|
for (y = s->h - 1; y >= 1; y--) {
|
|
memmove(outpicref->data[plane] + (y ) * outpicref->linesize[plane],
|
|
outpicref->data[plane] + (y-1) * outpicref->linesize[plane],
|
|
s->w);
|
|
}
|
|
}
|
|
s->xpos = 0;
|
|
}
|
|
for (plane = 0; plane < 3; plane++) {
|
|
uint8_t *p = outpicref->data[plane] + s->start_x +
|
|
(s->xpos + s->start_y) * outpicref->linesize[plane];
|
|
for (x = 0; x < s->w; x++) {
|
|
*p = lrintf(av_clipf(s->combine_buffer[3 * x + plane], 0, 255));
|
|
p++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s->sliding != FULLFRAME || s->xpos == 0)
|
|
outpicref->pts = insamples->pts;
|
|
|
|
s->xpos++;
|
|
if (s->orientation == VERTICAL && s->xpos >= s->w)
|
|
s->xpos = 0;
|
|
if (s->orientation == HORIZONTAL && s->xpos >= s->h)
|
|
s->xpos = 0;
|
|
if (!s->single_pic && (s->sliding != FULLFRAME || s->xpos == 0)) {
|
|
ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return s->win_size;
|
|
}
|
|
|
|
#if CONFIG_SHOWSPECTRUM_FILTER
|
|
|
|
static int request_frame(AVFilterLink *outlink)
|
|
{
|
|
ShowSpectrumContext *s = outlink->src->priv;
|
|
AVFilterLink *inlink = outlink->src->inputs[0];
|
|
unsigned i;
|
|
int ret;
|
|
|
|
ret = ff_request_frame(inlink);
|
|
if (ret == AVERROR_EOF && s->sliding == FULLFRAME && s->xpos > 0 &&
|
|
s->outpicref) {
|
|
if (s->orientation == VERTICAL) {
|
|
for (i = 0; i < outlink->h; i++) {
|
|
memset(s->outpicref->data[0] + i * s->outpicref->linesize[0] + s->xpos, 0, outlink->w - s->xpos);
|
|
memset(s->outpicref->data[1] + i * s->outpicref->linesize[1] + s->xpos, 128, outlink->w - s->xpos);
|
|
memset(s->outpicref->data[2] + i * s->outpicref->linesize[2] + s->xpos, 128, outlink->w - s->xpos);
|
|
}
|
|
} else {
|
|
for (i = s->xpos; i < outlink->h; i++) {
|
|
memset(s->outpicref->data[0] + i * s->outpicref->linesize[0], 0, outlink->w);
|
|
memset(s->outpicref->data[1] + i * s->outpicref->linesize[1], 128, outlink->w);
|
|
memset(s->outpicref->data[2] + i * s->outpicref->linesize[2], 128, outlink->w);
|
|
}
|
|
}
|
|
ret = ff_filter_frame(outlink, s->outpicref);
|
|
s->outpicref = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
ShowSpectrumContext *s = ctx->priv;
|
|
AVFrame *fin = NULL;
|
|
int ret = 0;
|
|
|
|
av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples);
|
|
av_frame_free(&insamples);
|
|
while (av_audio_fifo_size(s->fifo) >= s->win_size) {
|
|
fin = ff_get_audio_buffer(inlink, s->win_size);
|
|
if (!fin) {
|
|
ret = AVERROR(ENOMEM);
|
|
goto fail;
|
|
}
|
|
|
|
fin->pts = s->pts;
|
|
s->pts += s->skip_samples;
|
|
ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
|
|
if (ret < 0)
|
|
goto fail;
|
|
|
|
av_assert0(fin->nb_samples == s->win_size);
|
|
|
|
run_fft(s, fin);
|
|
calc_magnitudes(s);
|
|
|
|
ret = plot_spectrum_column(inlink, fin);
|
|
av_frame_free(&fin);
|
|
av_audio_fifo_drain(s->fifo, s->skip_samples);
|
|
if (ret < 0)
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
av_frame_free(&fin);
|
|
return ret;
|
|
}
|
|
|
|
static const AVFilterPad showspectrum_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad showspectrum_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = request_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_avf_showspectrum = {
|
|
.name = "showspectrum",
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output."),
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
.priv_size = sizeof(ShowSpectrumContext),
|
|
.inputs = showspectrum_inputs,
|
|
.outputs = showspectrum_outputs,
|
|
.priv_class = &showspectrum_class,
|
|
};
|
|
#endif // CONFIG_SHOWSPECTRUM_FILTER
|
|
|
|
#if CONFIG_SHOWSPECTRUMPIC_FILTER
|
|
|
|
static const AVOption showspectrumpic_options[] = {
|
|
{ "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
|
|
{ "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "4096x2048"}, 0, 0, FLAGS },
|
|
{ "mode", "set channel display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=COMBINED}, 0, NB_MODES-1, FLAGS, "mode" },
|
|
{ "combined", "combined mode", 0, AV_OPT_TYPE_CONST, {.i64=COMBINED}, 0, 0, FLAGS, "mode" },
|
|
{ "separate", "separate mode", 0, AV_OPT_TYPE_CONST, {.i64=SEPARATE}, 0, 0, FLAGS, "mode" },
|
|
{ "color", "set channel coloring", OFFSET(color_mode), AV_OPT_TYPE_INT, {.i64=INTENSITY}, 0, NB_CLMODES-1, FLAGS, "color" },
|
|
{ "channel", "separate color for each channel", 0, AV_OPT_TYPE_CONST, {.i64=CHANNEL}, 0, 0, FLAGS, "color" },
|
|
{ "intensity", "intensity based coloring", 0, AV_OPT_TYPE_CONST, {.i64=INTENSITY}, 0, 0, FLAGS, "color" },
|
|
{ "rainbow", "rainbow based coloring", 0, AV_OPT_TYPE_CONST, {.i64=RAINBOW}, 0, 0, FLAGS, "color" },
|
|
{ "moreland", "moreland based coloring", 0, AV_OPT_TYPE_CONST, {.i64=MORELAND}, 0, 0, FLAGS, "color" },
|
|
{ "nebulae", "nebulae based coloring", 0, AV_OPT_TYPE_CONST, {.i64=NEBULAE}, 0, 0, FLAGS, "color" },
|
|
{ "fire", "fire based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIRE}, 0, 0, FLAGS, "color" },
|
|
{ "fiery", "fiery based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FIERY}, 0, 0, FLAGS, "color" },
|
|
{ "fruit", "fruit based coloring", 0, AV_OPT_TYPE_CONST, {.i64=FRUIT}, 0, 0, FLAGS, "color" },
|
|
{ "scale", "set display scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64=LOG}, 0, NB_SCALES-1, FLAGS, "scale" },
|
|
{ "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SQRT}, 0, 0, FLAGS, "scale" },
|
|
{ "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=CBRT}, 0, 0, FLAGS, "scale" },
|
|
{ "4thrt","4th root", 0, AV_OPT_TYPE_CONST, {.i64=FOURTHRT}, 0, 0, FLAGS, "scale" },
|
|
{ "5thrt","5th root", 0, AV_OPT_TYPE_CONST, {.i64=FIFTHRT}, 0, 0, FLAGS, "scale" },
|
|
{ "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=LOG}, 0, 0, FLAGS, "scale" },
|
|
{ "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=LINEAR}, 0, 0, FLAGS, "scale" },
|
|
{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
|
|
{ "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANNING}, 0, NB_WFUNC-1, FLAGS, "win_func" },
|
|
{ "rect", "Rectangular", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_RECT}, 0, 0, FLAGS, "win_func" },
|
|
{ "bartlett", "Bartlett", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BARTLETT}, 0, 0, FLAGS, "win_func" },
|
|
{ "hann", "Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
|
|
{ "hanning", "Hanning", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HANNING}, 0, 0, FLAGS, "win_func" },
|
|
{ "hamming", "Hamming", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" },
|
|
{ "blackman", "Blackman", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
|
|
{ "welch", "Welch", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_WELCH}, 0, 0, FLAGS, "win_func" },
|
|
{ "flattop", "Flat-top", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_FLATTOP}, 0, 0, FLAGS, "win_func" },
|
|
{ "bharris", "Blackman-Harris", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHARRIS}, 0, 0, FLAGS, "win_func" },
|
|
{ "bnuttall", "Blackman-Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BNUTTALL}, 0, 0, FLAGS, "win_func" },
|
|
{ "bhann", "Bartlett-Hann", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_BHANN}, 0, 0, FLAGS, "win_func" },
|
|
{ "sine", "Sine", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_SINE}, 0, 0, FLAGS, "win_func" },
|
|
{ "nuttall", "Nuttall", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_NUTTALL}, 0, 0, FLAGS, "win_func" },
|
|
{ "lanczos", "Lanczos", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_LANCZOS}, 0, 0, FLAGS, "win_func" },
|
|
{ "gauss", "Gauss", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_GAUSS}, 0, 0, FLAGS, "win_func" },
|
|
{ "tukey", "Tukey", 0, AV_OPT_TYPE_CONST, {.i64=WFUNC_TUKEY}, 0, 0, FLAGS, "win_func" },
|
|
{ "orientation", "set orientation", OFFSET(orientation), AV_OPT_TYPE_INT, {.i64=VERTICAL}, 0, NB_ORIENTATIONS-1, FLAGS, "orientation" },
|
|
{ "vertical", NULL, 0, AV_OPT_TYPE_CONST, {.i64=VERTICAL}, 0, 0, FLAGS, "orientation" },
|
|
{ "horizontal", NULL, 0, AV_OPT_TYPE_CONST, {.i64=HORIZONTAL}, 0, 0, FLAGS, "orientation" },
|
|
{ "gain", "set scale gain", OFFSET(gain), AV_OPT_TYPE_FLOAT, {.dbl = 1}, 0, 128, FLAGS },
|
|
{ "legend", "draw legend", OFFSET(legend), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(showspectrumpic);
|
|
|
|
static void drawtext(AVFrame *pic, int x, int y, const char *txt, int o)
|
|
{
|
|
const uint8_t *font;
|
|
int font_height;
|
|
int i;
|
|
|
|
font = avpriv_cga_font, font_height = 8;
|
|
|
|
for (i = 0; txt[i]; i++) {
|
|
int char_y, mask;
|
|
|
|
if (o) {
|
|
for (char_y = font_height - 1; char_y >= 0; char_y--) {
|
|
uint8_t *p = pic->data[0] + (y + i * 10) * pic->linesize[0] + x;
|
|
for (mask = 0x80; mask; mask >>= 1) {
|
|
if (font[txt[i] * font_height + font_height - 1 - char_y] & mask)
|
|
p[char_y] = ~p[char_y];
|
|
p += pic->linesize[0];
|
|
}
|
|
}
|
|
} else {
|
|
uint8_t *p = pic->data[0] + y*pic->linesize[0] + (x + i*8);
|
|
for (char_y = 0; char_y < font_height; char_y++) {
|
|
for (mask = 0x80; mask; mask >>= 1) {
|
|
if (font[txt[i] * font_height + char_y] & mask)
|
|
*p = ~(*p);
|
|
p++;
|
|
}
|
|
p += pic->linesize[0] - 8;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int showspectrumpic_request_frame(AVFilterLink *outlink)
|
|
{
|
|
ShowSpectrumContext *s = outlink->src->priv;
|
|
AVFilterLink *inlink = outlink->src->inputs[0];
|
|
int ret;
|
|
|
|
ret = ff_request_frame(inlink);
|
|
if (ret == AVERROR_EOF && s->outpicref) {
|
|
int samples = av_audio_fifo_size(s->fifo);
|
|
int consumed = 0;
|
|
int y, x = 0, sz = s->orientation == VERTICAL ? s->w : s->h;
|
|
int ch, spf, spb;
|
|
AVFrame *fin;
|
|
|
|
spf = s->win_size * (samples / ((s->win_size * sz) * ceil(samples / (float)(s->win_size * sz))));
|
|
spb = (samples / (spf * sz)) * spf;
|
|
|
|
fin = ff_get_audio_buffer(inlink, s->win_size);
|
|
if (!fin)
|
|
return AVERROR(ENOMEM);
|
|
|
|
while (x < sz) {
|
|
ret = av_audio_fifo_peek(s->fifo, (void **)fin->extended_data, s->win_size);
|
|
if (ret < 0) {
|
|
av_frame_free(&fin);
|
|
return ret;
|
|
}
|
|
|
|
av_audio_fifo_drain(s->fifo, spf);
|
|
|
|
if (ret < s->win_size) {
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
memset(fin->extended_data[ch] + ret * sizeof(float), 0,
|
|
(s->win_size - ret) * sizeof(float));
|
|
}
|
|
}
|
|
|
|
run_fft(s, fin);
|
|
acalc_magnitudes(s);
|
|
|
|
consumed += spf;
|
|
if (consumed >= spb) {
|
|
int h = s->orientation == VERTICAL ? s->h : s->w;
|
|
|
|
scale_magnitudes(s, 1. / (consumed / spf));
|
|
plot_spectrum_column(inlink, fin);
|
|
consumed = 0;
|
|
x++;
|
|
for (ch = 0; ch < s->nb_display_channels; ch++)
|
|
memset(s->magnitudes[ch], 0, h * sizeof(float));
|
|
}
|
|
}
|
|
|
|
av_frame_free(&fin);
|
|
s->outpicref->pts = 0;
|
|
|
|
if (s->legend) {
|
|
int multi = (s->mode == SEPARATE && s->color_mode == CHANNEL);
|
|
float spp = samples / (float)sz;
|
|
uint8_t *dst;
|
|
|
|
drawtext(s->outpicref, 2, outlink->h - 10, "CREATED BY LIBAVFILTER", 0);
|
|
|
|
dst = s->outpicref->data[0] + (s->start_y - 1) * s->outpicref->linesize[0] + s->start_x - 1;
|
|
for (x = 0; x < s->w + 1; x++)
|
|
dst[x] = 200;
|
|
dst = s->outpicref->data[0] + (s->start_y + s->h) * s->outpicref->linesize[0] + s->start_x - 1;
|
|
for (x = 0; x < s->w + 1; x++)
|
|
dst[x] = 200;
|
|
for (y = 0; y < s->h + 2; y++) {
|
|
dst = s->outpicref->data[0] + (y + s->start_y - 1) * s->outpicref->linesize[0];
|
|
dst[s->start_x - 1] = 200;
|
|
dst[s->start_x + s->w] = 200;
|
|
}
|
|
if (s->orientation == VERTICAL) {
|
|
int h = s->mode == SEPARATE ? s->h / s->nb_display_channels : s->h;
|
|
for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
|
|
for (y = 0; y < h; y += 20) {
|
|
dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0];
|
|
dst[s->start_x - 2] = 200;
|
|
dst[s->start_x + s->w + 1] = 200;
|
|
}
|
|
for (y = 0; y < h; y += 40) {
|
|
dst = s->outpicref->data[0] + (s->start_y + h * (ch + 1) - y - 1) * s->outpicref->linesize[0];
|
|
dst[s->start_x - 3] = 200;
|
|
dst[s->start_x + s->w + 2] = 200;
|
|
}
|
|
dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x;
|
|
for (x = 0; x < s->w; x+=40)
|
|
dst[x] = 200;
|
|
dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x;
|
|
for (x = 0; x < s->w; x+=80)
|
|
dst[x] = 200;
|
|
dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x;
|
|
for (x = 0; x < s->w; x+=40) {
|
|
dst[x] = 200;
|
|
}
|
|
dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x;
|
|
for (x = 0; x < s->w; x+=80) {
|
|
dst[x] = 200;
|
|
}
|
|
for (y = 0; y < h; y += 40) {
|
|
float hz = y * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(h)));
|
|
char *units;
|
|
|
|
if (hz == 0)
|
|
units = av_asprintf("DC");
|
|
else
|
|
units = av_asprintf("%.2f", hz);
|
|
if (!units)
|
|
return AVERROR(ENOMEM);
|
|
|
|
drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, h * (ch + 1) + s->start_y - y - 4, units, 0);
|
|
av_free(units);
|
|
}
|
|
}
|
|
|
|
for (x = 0; x < s->w; x+=80) {
|
|
float seconds = x * spp / inlink->sample_rate;
|
|
char *units;
|
|
|
|
if (x == 0)
|
|
units = av_asprintf("0");
|
|
else if (log10(seconds) > 6)
|
|
units = av_asprintf("%.2fh", seconds / (60 * 60));
|
|
else if (log10(seconds) > 3)
|
|
units = av_asprintf("%.2fm", seconds / 60);
|
|
else
|
|
units = av_asprintf("%.2fs", seconds);
|
|
if (!units)
|
|
return AVERROR(ENOMEM);
|
|
|
|
drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->h + s->start_y + 6, units, 0);
|
|
drawtext(s->outpicref, s->start_x + x - 4 * strlen(units), s->start_y - 12, units, 0);
|
|
av_free(units);
|
|
}
|
|
|
|
drawtext(s->outpicref, outlink->w / 2 - 4 * 4, outlink->h - s->start_y / 2, "TIME", 0);
|
|
drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 14 * 4, "FREQUENCY (Hz)", 1);
|
|
} else {
|
|
int w = s->mode == SEPARATE ? s->w / s->nb_display_channels : s->w;
|
|
for (y = 0; y < s->h; y += 20) {
|
|
dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
|
|
dst[s->start_x - 2] = 200;
|
|
dst[s->start_x + s->w + 1] = 200;
|
|
}
|
|
for (y = 0; y < s->h; y += 40) {
|
|
dst = s->outpicref->data[0] + (s->start_y + y) * s->outpicref->linesize[0];
|
|
dst[s->start_x - 3] = 200;
|
|
dst[s->start_x + s->w + 2] = 200;
|
|
}
|
|
for (ch = 0; ch < (s->mode == SEPARATE ? s->nb_display_channels : 1); ch++) {
|
|
dst = s->outpicref->data[0] + (s->start_y - 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
|
for (x = 0; x < w; x+=40)
|
|
dst[x] = 200;
|
|
dst = s->outpicref->data[0] + (s->start_y - 3) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
|
for (x = 0; x < w; x+=80)
|
|
dst[x] = 200;
|
|
dst = s->outpicref->data[0] + (s->h + s->start_y + 1) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
|
for (x = 0; x < w; x+=40) {
|
|
dst[x] = 200;
|
|
}
|
|
dst = s->outpicref->data[0] + (s->h + s->start_y + 2) * s->outpicref->linesize[0] + s->start_x + w * ch;
|
|
for (x = 0; x < w; x+=80) {
|
|
dst[x] = 200;
|
|
}
|
|
for (x = 0; x < w; x += 80) {
|
|
float hz = x * (inlink->sample_rate / 2) / (float)(1 << (int)ceil(log2(w)));
|
|
char *units;
|
|
|
|
if (hz == 0)
|
|
units = av_asprintf("DC");
|
|
else
|
|
units = av_asprintf("%.2f", hz);
|
|
if (!units)
|
|
return AVERROR(ENOMEM);
|
|
|
|
drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->start_y - 12, units, 0);
|
|
drawtext(s->outpicref, s->start_x - 4 * strlen(units) + x + w * ch, s->h + s->start_y + 6, units, 0);
|
|
av_free(units);
|
|
}
|
|
}
|
|
for (y = 0; y < s->h; y+=40) {
|
|
float seconds = y * spp / inlink->sample_rate;
|
|
char *units;
|
|
|
|
if (x == 0)
|
|
units = av_asprintf("0");
|
|
else if (log10(seconds) > 6)
|
|
units = av_asprintf("%.2fh", seconds / (60 * 60));
|
|
else if (log10(seconds) > 3)
|
|
units = av_asprintf("%.2fm", seconds / 60);
|
|
else
|
|
units = av_asprintf("%.2fs", seconds);
|
|
if (!units)
|
|
return AVERROR(ENOMEM);
|
|
|
|
drawtext(s->outpicref, s->start_x - 8 * strlen(units) - 4, s->start_y + y - 4, units, 0);
|
|
av_free(units);
|
|
}
|
|
drawtext(s->outpicref, s->start_x / 7, outlink->h / 2 - 4 * 4, "TIME", 1);
|
|
drawtext(s->outpicref, outlink->w / 2 - 14 * 4, outlink->h - s->start_y / 2, "FREQUENCY (Hz)", 0);
|
|
}
|
|
|
|
for (ch = 0; ch < (multi ? s->nb_display_channels : 1); ch++) {
|
|
int h = multi ? s->h / s->nb_display_channels : s->h;
|
|
|
|
for (y = 0; y < h; y++) {
|
|
float out[3] = { 0., 127.5, 127.5};
|
|
int chn;
|
|
|
|
for (chn = 0; chn < (s->mode == SEPARATE ? 1 : s->nb_display_channels); chn++) {
|
|
float yf, uf, vf;
|
|
int channel = (multi) ? s->nb_display_channels - ch - 1 : chn;
|
|
|
|
color_range(s, channel, &yf, &uf, &vf);
|
|
pick_color(s, yf, uf, vf, y / (float)h, out);
|
|
}
|
|
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);
|
|
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);
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
|
|
ret = ff_filter_frame(outlink, s->outpicref);
|
|
s->outpicref = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int showspectrumpic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
ShowSpectrumContext *s = ctx->priv;
|
|
int ret;
|
|
|
|
ret = av_audio_fifo_write(s->fifo, (void **)insamples->extended_data, insamples->nb_samples);
|
|
av_frame_free(&insamples);
|
|
return ret;
|
|
}
|
|
|
|
static const AVFilterPad showspectrumpic_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.filter_frame = showspectrumpic_filter_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
static const AVFilterPad showspectrumpic_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.config_props = config_output,
|
|
.request_frame = showspectrumpic_request_frame,
|
|
},
|
|
{ NULL }
|
|
};
|
|
|
|
AVFilter ff_avf_showspectrumpic = {
|
|
.name = "showspectrumpic",
|
|
.description = NULL_IF_CONFIG_SMALL("Convert input audio to a spectrum video output single picture."),
|
|
.uninit = uninit,
|
|
.query_formats = query_formats,
|
|
.priv_size = sizeof(ShowSpectrumContext),
|
|
.inputs = showspectrumpic_inputs,
|
|
.outputs = showspectrumpic_outputs,
|
|
.priv_class = &showspectrumpic_class,
|
|
};
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|
|
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#endif // CONFIG_SHOWSPECTRUMPIC_FILTER
|