2011-12-29 22:45:45 +00:00
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/*
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2013-11-20 15:20:11 +00:00
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* Copyright (c) 2012-2013 Clément Bœsch
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2013-02-18 12:34:37 +00:00
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* Copyright (c) 2013 Rudolf Polzer <divverent@xonotic.org>
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2011-12-29 22:45:45 +00:00
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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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2013-02-01 15:33:17 +00:00
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#include "libavutil/avassert.h"
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2012-11-13 13:16:48 +00:00
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#include "libavutil/channel_layout.h"
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2011-12-29 22:45:45 +00:00
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#include "libavutil/opt.h"
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#include "avfilter.h"
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#include "internal.h"
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2013-02-01 15:33:17 +00:00
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enum DisplayMode { COMBINED, SEPARATE, NB_MODES };
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enum DisplayScale { LINEAR, SQRT, CBRT, LOG, NB_SCALES };
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enum ColorMode { CHANNEL, INTENSITY, NB_CLMODES };
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2013-11-20 15:35:48 +00:00
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enum WindowFunc { WFUNC_NONE, WFUNC_HANN, WFUNC_HAMMING, WFUNC_BLACKMAN, NB_WFUNC };
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2014-08-03 17:30:04 +00:00
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enum SlideMode { REPLACE, SCROLL, FULLFRAME, NB_SLIDES };
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2013-02-01 15:33:17 +00:00
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2011-12-29 22:45:45 +00:00
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typedef struct {
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const AVClass *class;
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int w, h;
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2013-03-10 00:30:30 +00:00
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AVFrame *outpicref;
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2013-02-01 15:33:17 +00:00
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int nb_display_channels;
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int channel_height;
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2012-10-21 19:01:18 +00:00
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int sliding; ///< 1 if sliding mode, 0 otherwise
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2015-02-02 22:07:54 +00:00
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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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2013-02-01 15:33:17 +00:00
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float saturation; ///< color saturation multiplier
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2011-12-29 22:45:45 +00:00
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int xpos; ///< x position (current column)
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RDFTContext *rdft; ///< Real Discrete Fourier Transform context
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int rdft_bits; ///< number of bits (RDFT window size = 1<<rdft_bits)
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2013-02-01 15:33:17 +00:00
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FFTSample **rdft_data; ///< bins holder for each (displayed) channels
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2011-12-29 22:45:45 +00:00
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float *window_func_lut; ///< Window function LUT
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2015-02-02 22:07:54 +00:00
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int win_func;
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2013-02-01 15:33:17 +00:00
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float *combine_buffer; ///< color combining buffer (3 * h items)
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2011-12-29 22:45:45 +00:00
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} ShowSpectrumContext;
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#define OFFSET(x) offsetof(ShowSpectrumContext, x)
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2012-08-20 23:03:36 +00:00
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
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2011-12-29 22:45:45 +00:00
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static const AVOption showspectrum_options[] = {
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2013-02-03 17:03:39 +00:00
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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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2014-08-03 17:30:04 +00:00
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{ "slide", "set sliding mode", OFFSET(sliding), AV_OPT_TYPE_INT, {.i64 = 0}, 0, NB_SLIDES, FLAGS, "slide" },
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2014-08-20 16:49:01 +00:00
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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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2014-08-03 17:30:04 +00:00
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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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{ "fullframe", "return full frames", 0, AV_OPT_TYPE_CONST, {.i64=FULLFRAME}, 0, 0, FLAGS, "slide" },
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2013-02-01 15:33:17 +00:00
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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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2013-11-20 15:37:34 +00:00
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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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2013-02-01 15:33:17 +00:00
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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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2013-11-20 15:37:34 +00:00
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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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2013-02-01 15:33:17 +00:00
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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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2013-11-20 15:37:34 +00:00
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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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{ "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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2013-02-01 15:33:17 +00:00
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{ "saturation", "color saturation multiplier", OFFSET(saturation), AV_OPT_TYPE_FLOAT, {.dbl = 1}, -10, 10, FLAGS },
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2013-11-20 15:20:11 +00:00
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{ "win_func", "set window function", OFFSET(win_func), AV_OPT_TYPE_INT, {.i64 = WFUNC_HANN}, 0, NB_WFUNC-1, FLAGS, "win_func" },
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2013-11-20 15:37:59 +00:00
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{ "hann", "Hann window", 0, AV_OPT_TYPE_CONST, {.i64 = WFUNC_HANN}, 0, 0, FLAGS, "win_func" },
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{ "hamming", "Hamming window", 0, AV_OPT_TYPE_CONST, {.i64 = WFUNC_HAMMING}, 0, 0, FLAGS, "win_func" },
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{ "blackman", "Blackman window", 0, AV_OPT_TYPE_CONST, {.i64 = WFUNC_BLACKMAN}, 0, 0, FLAGS, "win_func" },
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2013-09-07 12:13:50 +00:00
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{ NULL }
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2011-12-29 22:45:45 +00:00
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};
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AVFILTER_DEFINE_CLASS(showspectrum);
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2013-02-14 22:10:01 +00:00
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static const struct {
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2013-02-01 15:33:17 +00:00
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float a, y, u, v;
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2013-02-14 22:10:01 +00:00
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} intensity_color_table[] = {
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2013-02-14 22:04:15 +00:00
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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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2013-02-01 15:33:17 +00:00
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};
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2011-12-29 22:45:45 +00:00
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static av_cold void uninit(AVFilterContext *ctx)
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{
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2013-05-16 16:28:25 +00:00
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ShowSpectrumContext *s = ctx->priv;
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2013-02-01 15:33:17 +00:00
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int i;
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2011-12-29 22:45:45 +00:00
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2013-05-16 16:28:25 +00:00
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av_freep(&s->combine_buffer);
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av_rdft_end(s->rdft);
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for (i = 0; i < s->nb_display_channels; i++)
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av_freep(&s->rdft_data[i]);
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av_freep(&s->rdft_data);
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av_freep(&s->window_func_lut);
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av_frame_free(&s->outpicref);
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2011-12-29 22:45:45 +00:00
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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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2012-11-05 13:34:08 +00:00
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static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16P, AV_SAMPLE_FMT_NONE };
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2013-02-01 15:33:17 +00:00
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static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_NONE };
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2015-10-05 03:39:25 +00:00
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int ret;
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2011-12-29 22:45:45 +00:00
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/* set input audio formats */
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formats = ff_make_format_list(sample_fmts);
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2015-10-05 03:39:25 +00:00
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if ((ret = ff_formats_ref(formats, &inlink->out_formats)) < 0)
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return ret;
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2011-12-29 22:45:45 +00:00
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layouts = ff_all_channel_layouts();
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2015-10-05 03:39:25 +00:00
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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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2011-12-29 22:45:45 +00:00
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formats = ff_all_samplerates();
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2015-10-05 03:39:25 +00:00
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if ((ret = ff_formats_ref(formats, &inlink->out_samplerates)) < 0)
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return ret;
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2011-12-29 22:45:45 +00:00
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/* set output video format */
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formats = ff_make_format_list(pix_fmts);
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2015-10-05 03:39:25 +00:00
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if ((ret = ff_formats_ref(formats, &outlink->in_formats)) < 0)
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return ret;
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2011-12-29 22:45:45 +00:00
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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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2013-02-01 15:33:17 +00:00
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AVFilterLink *inlink = ctx->inputs[0];
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2013-05-16 16:28:25 +00:00
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ShowSpectrumContext *s = ctx->priv;
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2013-02-01 15:33:17 +00:00
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int i, rdft_bits, win_size, h;
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2011-12-29 22:45:45 +00:00
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2013-05-16 16:28:25 +00:00
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outlink->w = s->w;
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outlink->h = s->h;
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2011-12-29 22:45:45 +00:00
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2013-05-16 16:28:25 +00:00
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h = (s->mode == COMBINED) ? outlink->h : outlink->h / inlink->channels;
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s->channel_height = h;
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2013-02-01 15:33:17 +00:00
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2011-12-29 22:45:45 +00:00
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/* RDFT window size (precision) according to the requested output frame height */
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2013-02-01 15:33:17 +00:00
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for (rdft_bits = 1; 1 << rdft_bits < 2 * h; rdft_bits++);
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2011-12-29 22:45:45 +00:00
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win_size = 1 << rdft_bits;
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/* (re-)configuration if the video output changed (or first init) */
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2013-05-16 16:28:25 +00:00
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if (rdft_bits != s->rdft_bits) {
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2013-03-10 00:30:30 +00:00
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AVFrame *outpicref;
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2011-12-29 22:45:45 +00:00
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2013-05-16 16:28:25 +00:00
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av_rdft_end(s->rdft);
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s->rdft = av_rdft_init(rdft_bits, DFT_R2C);
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2014-08-03 18:39:59 +00:00
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if (!s->rdft) {
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av_log(ctx, AV_LOG_ERROR, "Unable to create RDFT 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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2013-05-16 16:28:25 +00:00
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s->rdft_bits = rdft_bits;
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2011-12-29 22:45:45 +00:00
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2012-10-26 16:42:54 +00:00
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/* RDFT 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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2013-05-16 16:28:25 +00:00
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for (i = 0; i < s->nb_display_channels; i++)
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av_freep(&s->rdft_data[i]);
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av_freep(&s->rdft_data);
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s->nb_display_channels = inlink->channels;
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2013-02-01 15:33:17 +00:00
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2015-08-06 12:58:13 +00:00
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s->rdft_data = av_calloc(s->nb_display_channels, sizeof(*s->rdft_data));
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2013-05-16 16:28:25 +00:00
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if (!s->rdft_data)
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2011-12-29 22:45:45 +00:00
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return AVERROR(ENOMEM);
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2013-05-16 16:28:25 +00:00
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for (i = 0; i < s->nb_display_channels; i++) {
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2015-08-06 12:58:13 +00:00
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s->rdft_data[i] = av_calloc(win_size, sizeof(**s->rdft_data));
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2013-05-16 16:28:25 +00:00
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if (!s->rdft_data[i])
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2013-02-01 15:33:17 +00:00
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return AVERROR(ENOMEM);
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}
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2011-12-29 22:45:45 +00:00
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2013-11-20 15:20:11 +00:00
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/* pre-calc windowing function */
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2013-05-16 16:28:25 +00:00
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s->window_func_lut =
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av_realloc_f(s->window_func_lut, win_size,
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sizeof(*s->window_func_lut));
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if (!s->window_func_lut)
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2011-12-29 22:45:45 +00:00
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return AVERROR(ENOMEM);
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2013-11-20 15:20:11 +00:00
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switch (s->win_func) {
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case WFUNC_NONE:
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for (i = 0; i < win_size; i++)
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s->window_func_lut[i] = 1.;
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break;
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case WFUNC_HANN:
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for (i = 0; i < win_size; i++)
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s->window_func_lut[i] = .5f * (1 - cos(2*M_PI*i / (win_size-1)));
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break;
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case WFUNC_HAMMING:
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for (i = 0; i < win_size; i++)
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s->window_func_lut[i] = .54f - .46f * cos(2*M_PI*i / (win_size-1));
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break;
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2013-11-20 15:35:48 +00:00
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case WFUNC_BLACKMAN: {
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for (i = 0; i < win_size; i++)
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s->window_func_lut[i] = .42f - .5f*cos(2*M_PI*i / (win_size-1)) + .08f*cos(4*M_PI*i / (win_size-1));
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break;
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}
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2013-11-20 15:20:11 +00:00
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default:
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av_assert0(0);
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}
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2011-12-29 22:45:45 +00:00
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/* prepare the initial picref buffer (black frame) */
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2013-05-16 16:28:25 +00:00
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av_frame_free(&s->outpicref);
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s->outpicref = outpicref =
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2013-03-10 00:30:30 +00:00
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ff_get_video_buffer(outlink, outlink->w, outlink->h);
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2011-12-29 22:45:45 +00:00
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if (!outpicref)
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return AVERROR(ENOMEM);
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outlink->sample_aspect_ratio = (AVRational){1,1};
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2013-04-29 13:31:04 +00:00
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for (i = 0; i < outlink->h; i++) {
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memset(outpicref->data[0] + i * outpicref->linesize[0], 0, outlink->w);
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|
|
memset(outpicref->data[1] + i * outpicref->linesize[1], 128, outlink->w);
|
|
|
|
memset(outpicref->data[2] + i * outpicref->linesize[2], 128, outlink->w);
|
|
|
|
}
|
2011-12-29 22:45:45 +00:00
|
|
|
}
|
|
|
|
|
2013-05-16 16:28:25 +00:00
|
|
|
if (s->xpos >= outlink->w)
|
|
|
|
s->xpos = 0;
|
2011-12-29 22:45:45 +00:00
|
|
|
|
2014-08-03 14:23:18 +00:00
|
|
|
outlink->frame_rate = av_make_q(inlink->sample_rate, win_size);
|
2014-08-03 17:30:04 +00:00
|
|
|
if (s->sliding == FULLFRAME)
|
|
|
|
outlink->frame_rate.den *= outlink->w;
|
2014-08-03 14:23:18 +00:00
|
|
|
|
2014-08-03 14:58:27 +00:00
|
|
|
inlink->min_samples = inlink->max_samples = inlink->partial_buf_size =
|
|
|
|
win_size;
|
|
|
|
|
2013-05-16 16:28:25 +00:00
|
|
|
s->combine_buffer =
|
|
|
|
av_realloc_f(s->combine_buffer, outlink->h * 3,
|
|
|
|
sizeof(*s->combine_buffer));
|
2013-02-01 15:33:17 +00:00
|
|
|
|
2011-12-29 22:45:45 +00:00
|
|
|
av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d RDFT window size:%d\n",
|
2013-05-16 16:28:25 +00:00
|
|
|
s->w, s->h, win_size);
|
2011-12-29 22:45:45 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int request_frame(AVFilterLink *outlink)
|
|
|
|
{
|
2013-05-16 16:28:25 +00:00
|
|
|
ShowSpectrumContext *s = outlink->src->priv;
|
2011-12-29 22:45:45 +00:00
|
|
|
AVFilterLink *inlink = outlink->src->inputs[0];
|
2014-08-03 17:30:04 +00:00
|
|
|
unsigned i;
|
2011-12-29 22:45:45 +00:00
|
|
|
int ret;
|
|
|
|
|
2015-10-02 14:03:16 +00:00
|
|
|
ret = ff_request_frame(inlink);
|
|
|
|
if (ret == AVERROR_EOF && s->sliding == FULLFRAME && s->xpos > 0 &&
|
|
|
|
s->outpicref) {
|
|
|
|
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);
|
2014-08-03 17:30:04 +00:00
|
|
|
}
|
2015-10-02 14:03:16 +00:00
|
|
|
ret = ff_filter_frame(outlink, s->outpicref);
|
|
|
|
s->outpicref = NULL;
|
|
|
|
}
|
2011-12-29 22:45:45 +00:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2014-08-03 14:58:27 +00:00
|
|
|
static int plot_spectrum_column(AVFilterLink *inlink, AVFrame *insamples)
|
2011-12-29 22:45:45 +00:00
|
|
|
{
|
2013-03-13 08:56:35 +00:00
|
|
|
int ret;
|
2011-12-29 22:45:45 +00:00
|
|
|
AVFilterContext *ctx = inlink->dst;
|
|
|
|
AVFilterLink *outlink = ctx->outputs[0];
|
2013-05-16 16:28:25 +00:00
|
|
|
ShowSpectrumContext *s = ctx->priv;
|
|
|
|
AVFrame *outpicref = s->outpicref;
|
2011-12-29 22:45:45 +00:00
|
|
|
|
|
|
|
/* nb_freq contains the power of two superior or equal to the output image
|
|
|
|
* height (or half the RDFT window size) */
|
2013-05-16 16:28:25 +00:00
|
|
|
const int nb_freq = 1 << (s->rdft_bits - 1);
|
2011-12-29 22:45:45 +00:00
|
|
|
const int win_size = nb_freq << 1;
|
2013-02-01 15:33:17 +00:00
|
|
|
const double w = 1. / (sqrt(nb_freq) * 32768.);
|
2014-08-03 14:58:27 +00:00
|
|
|
int h = s->channel_height;
|
2011-12-29 22:45:45 +00:00
|
|
|
|
2013-02-01 15:33:17 +00:00
|
|
|
int ch, plane, n, y;
|
2014-08-03 14:58:27 +00:00
|
|
|
|
|
|
|
av_assert0(insamples->nb_samples == win_size);
|
2011-12-29 22:45:45 +00:00
|
|
|
|
|
|
|
/* fill RDFT input with the number of samples available */
|
2013-05-16 16:28:25 +00:00
|
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
2011-12-29 22:45:45 +00:00
|
|
|
const int16_t *p = (int16_t *)insamples->extended_data[ch];
|
|
|
|
|
2014-08-03 14:58:27 +00:00
|
|
|
for (n = 0; n < win_size; n++)
|
|
|
|
s->rdft_data[ch][n] = p[n] * s->window_func_lut[n];
|
2011-12-29 22:45:45 +00:00
|
|
|
}
|
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
/* run RDFT on each samples set */
|
|
|
|
for (ch = 0; ch < s->nb_display_channels; ch++)
|
|
|
|
av_rdft_calc(s->rdft, s->rdft_data[ch]);
|
2013-02-01 15:33:17 +00:00
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
/* fill a new spectrum column */
|
2014-06-21 21:04:20 +00:00
|
|
|
#define RE(y, ch) s->rdft_data[ch][2 * (y) + 0]
|
|
|
|
#define IM(y, ch) s->rdft_data[ch][2 * (y) + 1]
|
2013-02-01 15:33:17 +00:00
|
|
|
#define MAGNITUDE(y, ch) hypot(RE(y, ch), IM(y, ch))
|
2011-12-29 22:45:45 +00:00
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
/* initialize buffer for combining to black */
|
|
|
|
for (y = 0; y < outlink->h; y++) {
|
|
|
|
s->combine_buffer[3 * y ] = 0;
|
|
|
|
s->combine_buffer[3 * y + 1] = 127.5;
|
|
|
|
s->combine_buffer[3 * y + 2] = 127.5;
|
|
|
|
}
|
2013-02-01 15:33:17 +00:00
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
for (ch = 0; ch < s->nb_display_channels; ch++) {
|
|
|
|
float yf, uf, vf;
|
|
|
|
|
|
|
|
/* decide color range */
|
|
|
|
switch (s->mode) {
|
|
|
|
case COMBINED:
|
|
|
|
// reduce range by channel count
|
|
|
|
yf = 256.0f / s->nb_display_channels;
|
|
|
|
switch (s->color_mode) {
|
|
|
|
case INTENSITY:
|
|
|
|
uf = yf;
|
|
|
|
vf = yf;
|
2013-02-01 15:33:17 +00:00
|
|
|
break;
|
2015-08-04 13:18:51 +00:00
|
|
|
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;
|
2013-02-01 15:33:17 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
av_assert0(0);
|
2012-10-21 19:01:18 +00:00
|
|
|
}
|
2015-08-04 13:18:51 +00:00
|
|
|
break;
|
|
|
|
case SEPARATE:
|
|
|
|
// full range
|
|
|
|
yf = 256.0f;
|
|
|
|
uf = 256.0f;
|
|
|
|
vf = 256.0f;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
av_assert0(0);
|
|
|
|
}
|
2012-10-21 19:01:18 +00:00
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
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;
|
2013-02-01 15:33:17 +00:00
|
|
|
}
|
2015-08-04 13:18:51 +00:00
|
|
|
}
|
|
|
|
uf *= s->saturation;
|
|
|
|
vf *= s->saturation;
|
2013-02-01 15:33:17 +00:00
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
/* 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 = w * MAGNITUDE(y, ch);
|
|
|
|
|
|
|
|
/* apply scale */
|
|
|
|
switch (s->scale) {
|
|
|
|
case LINEAR:
|
|
|
|
break;
|
|
|
|
case SQRT:
|
|
|
|
a = sqrt(a);
|
|
|
|
break;
|
|
|
|
case CBRT:
|
|
|
|
a = cbrt(a);
|
|
|
|
break;
|
|
|
|
case LOG:
|
2015-10-29 04:14:39 +00:00
|
|
|
a = 1 + log10(FFMAX(FFMIN(1, a), 1e-6)) / 6; // zero = -120dBFS
|
2015-08-04 13:18:51 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
av_assert0(0);
|
2013-02-01 15:33:17 +00:00
|
|
|
}
|
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
if (s->color_mode == INTENSITY) {
|
|
|
|
float y, u, v;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 1; i < sizeof(intensity_color_table) / sizeof(*intensity_color_table) - 1; i++)
|
|
|
|
if (intensity_color_table[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 <= intensity_color_table[i - 1].a) {
|
|
|
|
y = intensity_color_table[i - 1].y;
|
|
|
|
u = intensity_color_table[i - 1].u;
|
|
|
|
v = intensity_color_table[i - 1].v;
|
|
|
|
} else if (a >= intensity_color_table[i].a) {
|
|
|
|
y = intensity_color_table[i].y;
|
|
|
|
u = intensity_color_table[i].u;
|
|
|
|
v = intensity_color_table[i].v;
|
|
|
|
} else {
|
|
|
|
float start = intensity_color_table[i - 1].a;
|
|
|
|
float end = intensity_color_table[i].a;
|
|
|
|
float lerpfrac = (a - start) / (end - start);
|
|
|
|
y = intensity_color_table[i - 1].y * (1.0f - lerpfrac)
|
|
|
|
+ intensity_color_table[i].y * lerpfrac;
|
|
|
|
u = intensity_color_table[i - 1].u * (1.0f - lerpfrac)
|
|
|
|
+ intensity_color_table[i].u * lerpfrac;
|
|
|
|
v = intensity_color_table[i - 1].v * (1.0f - lerpfrac)
|
|
|
|
+ intensity_color_table[i].v * lerpfrac;
|
2013-02-01 15:33:17 +00:00
|
|
|
}
|
2015-08-04 13:18:51 +00:00
|
|
|
|
|
|
|
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;
|
2013-02-01 15:33:17 +00:00
|
|
|
}
|
|
|
|
}
|
2015-08-04 13:18:51 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* copy to output */
|
|
|
|
if (s->sliding == SCROLL) {
|
2013-02-01 15:33:17 +00:00
|
|
|
for (plane = 0; plane < 3; plane++) {
|
|
|
|
for (y = 0; y < outlink->h; y++) {
|
2015-08-04 13:18:51 +00:00
|
|
|
uint8_t *p = outpicref->data[plane] +
|
|
|
|
y * outpicref->linesize[plane];
|
|
|
|
memmove(p, p + 1, outlink->w - 1);
|
2013-02-01 15:33:17 +00:00
|
|
|
}
|
|
|
|
}
|
2015-08-04 13:18:51 +00:00
|
|
|
s->xpos = outlink->w - 1;
|
|
|
|
}
|
|
|
|
for (plane = 0; plane < 3; plane++) {
|
|
|
|
uint8_t *p = outpicref->data[plane] +
|
|
|
|
(outlink->h - 1) * outpicref->linesize[plane] +
|
|
|
|
s->xpos;
|
|
|
|
for (y = 0; y < outlink->h; y++) {
|
|
|
|
*p = rint(FFMAX(0, FFMIN(s->combine_buffer[3 * y + plane], 255)));
|
|
|
|
p -= outpicref->linesize[plane];
|
|
|
|
}
|
|
|
|
}
|
2013-02-01 15:33:17 +00:00
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
if (s->sliding != FULLFRAME || s->xpos == 0)
|
|
|
|
outpicref->pts = insamples->pts;
|
2014-08-03 17:30:04 +00:00
|
|
|
|
2015-08-04 13:18:51 +00:00
|
|
|
s->xpos++;
|
|
|
|
if (s->xpos >= outlink->w)
|
|
|
|
s->xpos = 0;
|
|
|
|
if (s->sliding != FULLFRAME || s->xpos == 0) {
|
|
|
|
ret = ff_filter_frame(outlink, av_frame_clone(s->outpicref));
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
}
|
2011-12-29 22:45:45 +00:00
|
|
|
|
2014-08-03 14:58:27 +00:00
|
|
|
return win_size;
|
2011-12-29 22:45:45 +00:00
|
|
|
}
|
|
|
|
|
2013-03-10 00:30:30 +00:00
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *insamples)
|
2011-12-29 22:45:45 +00:00
|
|
|
{
|
|
|
|
AVFilterContext *ctx = inlink->dst;
|
2013-05-16 16:28:25 +00:00
|
|
|
ShowSpectrumContext *s = ctx->priv;
|
2014-08-03 14:58:27 +00:00
|
|
|
unsigned win_size = 1 << s->rdft_bits;
|
|
|
|
int ret = 0;
|
2011-12-29 22:45:45 +00:00
|
|
|
|
2014-08-03 14:58:27 +00:00
|
|
|
av_assert0(insamples->nb_samples <= win_size);
|
|
|
|
if (insamples->nb_samples == win_size)
|
|
|
|
ret = plot_spectrum_column(inlink, insamples);
|
2011-12-29 22:45:45 +00:00
|
|
|
|
2013-03-10 00:30:30 +00:00
|
|
|
av_frame_free(&insamples);
|
2013-03-13 08:56:35 +00:00
|
|
|
return ret;
|
2011-12-29 22:45:45 +00:00
|
|
|
}
|
|
|
|
|
2012-11-28 19:01:59 +00:00
|
|
|
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 }
|
|
|
|
};
|
|
|
|
|
2013-10-29 10:50:56 +00:00
|
|
|
AVFilter ff_avf_showspectrum = {
|
2013-09-07 12:13:50 +00:00
|
|
|
.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,
|
2011-12-29 22:45:45 +00:00
|
|
|
};
|