Fex

Check-in [324d1ee857]

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Overview
Comment:begining python ui
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk | origin/sfml
Files: files | file ages | folders
SHA3-256: 324d1ee857e649ba5708856eeff38cd2b433cac0d6f9248479e69d16e1eed0c8
User & Date: jesse.mcclure@umassmed.edu 2016-02-12 17:12:15
Context
2016-02-15
19:42
crop window implemented check-in: 57f7252666 user: jesse.mcclure@umassmed.edu tags: trunk, origin/sfml
2016-02-12
17:12
begining python ui check-in: 324d1ee857 user: jesse.mcclure@umassmed.edu tags: trunk, origin/sfml
2016-02-10
18:35
cleaning up overlap drawing check-in: e7099aefda user: jesse.mcclure@umassmed.edu tags: trunk, origin/sfml
Changes
Hide Diffs Unified Diffs Ignore Whitespace Patch

Deleted Makefile.win.static. 

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PROG        =  fex
VER         =  3.0pre
PREFIX     ?=  /usr
CC          =  i686-w64-mingw32-c++
CXX         =  i686-w64-mingw32-c++
CONFFILE   ?=  ${PREFIX}/share/${PROG}/${PROG}rc
DEFS        =  -DPROGRAM_NAME=${PROG} -DPROGRAM_VER=${VER} -DDEFAULT_CONFIG=${CONFFILE}
CPPFLAGS   ?=  -D_FORTIFY_SOURCE=2
CXXFLAGS   ?=  -O2 -pipe --param=ssp-buffer-size=4
LDFLAGS    ?=  -Wl,-O1,--sort-common,--as-needed
CXXFLAGS   +=  -static $(shell i686-w64-mingw32-pkg-config --static --cflags fftw3) -std=c++11 ${DEFS}
LDLIBS     +=  -static $(shell i686-w64-mingw32-pkg-config --static --libs fftw3) $(shell pkg-config --static --libs sfml-all)
MODULES     =  config fex fft spectrogram
MANPAGES    =  ${PROG}.1 ${PROG}rc.5
VPATH       =  src

${PROG}: ${MODULES:%=%.o}

%.o: %.cpp %.hpp

clean:
	@rm -rf ${PROG}-*.tar.gz
	@rm -rf ${MODULES:%=%.o}

distclean: clean
	@rm -rf ${PROG} *.tar.gz

tarball: distclean
	@tar -czf ${PROG}-${VER}.tar.gz *

bundle: ${PROG}
	@mv ${PROG} ${PROG}.exe
	@cp /usr/i686-w64-mingw32/bin/libfftw3-3.dll ./
	@cp /usr/i686-w64-mingw32/bin/libfftw3f-3.dll ./
	@cp /usr/i686-w64-mingw32/bin/libfftw3l-3.dll ./
	@cp /usr/i686-w64-mingw32/bin/sfml-audio-2.dll ./
	@cp /usr/i686-w64-mingw32/bin/sfml-graphics-2.dll ./
	@cp /usr/i686-w64-mingw32/bin/sfml-network-2.dll ./
	@cp /usr/i686-w64-mingw32/bin/sfml-system-2.dll ./
	@cp /usr/i686-w64-mingw32/bin/sfml-window-2.dll ./
	@tar -czf ${PROG}-${VER}-win32.tar.gz ${PROG}.exe *.dll
	@rm -f *.dll

.PHONY: clean distclean tarball bundle

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Changes to TODO. 

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- Fix scaling of HUD
	* add second view?
- Add eraser function to spectrogram module






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- Add eraser function to spectrogram module
- Add crop option
- Add log transformation to frequency?
- Implement config file reading

Added pyfex/default.ini. 

























































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[defaults]
window length              = 256
bin size                   = 64
low pass                   = 01.25
high pass                  = 10.00
threshold                  = 18.00
floor                      = 24.00

[colors]
window background          = #606468FF
spectrogram background     = #FFFFFFFF
spectrogram foreground     = #000000FF
threshold                  = #58749848
point border               = #3399FFFF
point fill                 = #3399FF48
lines                      = #E86850FF

[warbler]
#match file extension       = wav
#match mime type            = audio/x-wav
match path                 = warber
threshold                  = 14.00

[sparrow]
match path                 = sparrow
threshold                  = 24.00

Added pyfex/fexUI. 























































































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#!/usr/bin/env python

from sys import argv
from subprocess import DEVNULL, check_output
from configparser import ConfigParser

ini = ConfigParser()
ini.read('default.ini')
conf = ini['defaults']
col = ini['colors']
args = [
	'./fex',
	'--winSize=' +    conf['window length'],
	'--binSize=' +    conf['bin size'],
	'--loPass=' +     conf['low pass'],
	'--hiPass=' +     conf['high pass'],
	'--threshold=' +  conf['threshold'],
	'--floor=' +      conf['floor'],
	'--winBG=' +      col['window background'],
	'--specBG=' +     col['spectrogram background'],
	'--specFG=' +     col['spectrogram foreground'],
	'--threshFG=' +   col['threshold'],
	'--pointBG=' +    col['point fill'],
	'--pointFG=' +    col['point border'],
	'--linesFG=' +    col['lines']
]

def run_fex(files):
	if len(files) == 0:
		print("zero")
		# prompt with dialog returning list of files
		# run_fex(list of files)
	elif len(files) == 1:
		print(check_output(args + [files[0]],stderr=DEVNULL).decode("utf-8"))
	else:
		print("many")
		# loop through files running fex on each

argv.remove(argv[0])
run_fex(argv)

Changes to src/config.cpp. 

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#include "config.hpp"













Config::Config(int argc, const char **argv) {
	// TODO read config file to override defaults

































	if (argc != 2) exit(1);
	fname = strdup(argv[1]);
	char *dup = strdup(argv[1]);
	name = strdup(basename(dup));
	free(dup);
}

Config::~Config() {
	if (name) free(name);
	if (fname) free(fname);
}




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#include "config.hpp"
#include <getopt.h>

sf::Color toColor(char *str) {
	if (str[0] == '#') ++str;
	unsigned long hex = strtoul(str,NULL,16);
	unsigned short int r,g,b,a;
	r = (hex & 0xFF000000) >> 24;
	g = (hex & 0x00FF0000) >> 16;
	b = (hex & 0x0000FF00) >> 8;
	a = (hex & 0x000000FF);
	return sf::Color(r,g,b,a);
}

Config::Config(int argc, char *const *argv) {

	struct option opts[] = {
		{ "winSize",     optional_argument, 0, 0 },
		{ "binSize",     optional_argument, 0, 0 },
		{ "loPass",      optional_argument, 0, 0 },
		{ "hiPass",      optional_argument, 0, 0 },
		{ "threshold",   optional_argument, 0, 0 },
		{ "floor",       optional_argument, 0, 0 },
		{ "winBG",       optional_argument, 0, 0 },
		{ "specBG",      optional_argument, 0, 0 },
		{ "specFG",      optional_argument, 0, 0 },
		{ "threshFG",    optional_argument, 0, 0 },
		{ "pointBG",     optional_argument, 0, 0 },
		{ "pointFG",     optional_argument, 0, 0 },
		{ "linesFG",     optional_argument, 0, 0 },
		{0,              0,                 0, 0 }
	};
	int i, c, index;
	for (i = 1; (c=getopt_long_only(argc, argv, "", opts, &index)) != -1; ++i) {
		if (c != 0 || !optarg) continue;
		else if (index == 0)  conf.winlen     = atoi(optarg);
		else if (index == 1)  conf.hop        = atoi(optarg);
		else if (index == 2)  conf.lopass     = atof(optarg);
		else if (index == 3)  conf.hipass     = atof(optarg);
		else if (index == 4)  conf.threshold  = atof(optarg);
		else if (index == 5)  conf.floor      = atof(optarg);
		else if (index == 6)  conf.winBG      = toColor(optarg);
		else if (index == 7)  conf.specBG     = toColor(optarg);
		else if (index == 8)  conf.specFG     = toColor(optarg);
		else if (index == 9)  conf.threshFG   = toColor(optarg);
		else if (index == 10) conf.pointBG    = toColor(optarg);
		else if (index == 11) conf.pointFG    = toColor(optarg);
		else if (index == 12) conf.linesFG    = toColor(optarg);
	}
	if (i > argc) exit(1);
	fname = strdup(argv[i]);
	char *dup = strdup(argv[i]);
	name = strdup(basename(dup));
	free(dup);
}

Config::~Config() {
	if (name) free(name);
	if (fname) free(fname);
}

Changes to src/config.hpp. 

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class Config {
	protected:
		struct {
			int winlen           = 256;
			int hop              = 64;
			double lopass        = 01.25;
			double hipass        = 10.00;
			double threshold     = 14.00;
			double floor         = 24.00;
			sf::Color winBG      = sf::Color(0xFE,0xEF,0xE0);
			sf::Color specBG     = sf::Color(0xFF,0xFF,0xFF);
			sf::Color specFG     = sf::Color(0x00,0x00,0x00);
			sf::Color threshFG   = sf::Color(0x58,0x74,0x98,0x48);
			sf::Color pointFB    = sf::Color(0x33,0x99,0xFF);
			sf::Color pointBG    = sf::Color(0x33,0x99,0xFF,0x48);
			sf::Color linesFG    = sf::Color(0xE8,0x68,0x50);
		} conf;
		struct {
			bool cursor       = false;
			bool hud          = true;
			bool overlay      = true;
		} show;
		char *fname = NULL, *name = NULL;

	public:
		Config(int, const char **);
		~Config();
};









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class Config {
	protected:
		struct {
			int winlen           = 256;
			int hop              = 64;
			double lopass        = 01.25;
			double hipass        = 10.00;
			double threshold     = 18.00;
			double floor         = 24.00;
			sf::Color winBG      = sf::Color(0x60,0x64,0x68);
			sf::Color specBG     = sf::Color(0xFF,0xFF,0xFF);
			sf::Color specFG     = sf::Color(0x00,0x00,0x00);
			sf::Color threshFG   = sf::Color(0x58,0x74,0x98,0x48);
			sf::Color pointFG    = sf::Color(0x33,0x99,0xFF);
			sf::Color pointBG    = sf::Color(0x33,0x99,0xFF,0x48);
			sf::Color linesFG    = sf::Color(0xE8,0x68,0x50);
		} conf;
		struct {
			bool cursor       = false;
			bool hud          = true;
			bool overlay      = true;
		} show;
		char *fname = NULL, *name = NULL;

	public:
		Config(int, char *const *);
		~Config();
};

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#include "spectrogram.hpp"

int main(int argc, const char **argv) {

	Spectrogram spec(argc, argv);
	spec.main_loop();

	return EXIT_SUCCESS;
}




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#include "spectrogram.hpp"

int main(int argc, char *const *argv) {
printf("ONE\n");
	Spectrogram spec(argc, argv);
	spec.main_loop();
printf("TWO\n");
	return EXIT_SUCCESS;
}

Changes to src/fft.cpp. 

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Blackman     0.42659   0.49656   0.076849  0.00
Nuttall      0.355768  0.487396  0.144232  0.012604
BlackNutt    0.3635819 0.4891775 0.1365995 0.0106411
BlackHarris  0.35875   0.48829   0.14128   0.01168

*/

Fft::Fft(int argc, const char **argv) : Config(argc, argv) {
	song.loadFromFile(fname);
	ntime = song.getSampleCount() / conf.hop;
	nfreq = conf.winlen / 2 + 0.5;
	time = (double *) malloc(ntime * sizeof(double));
	freq = (double *) malloc(nfreq * sizeof(double));
	amp = (double *) malloc(nfreq * ntime * sizeof(double));
	erase = (unsigned short int *) calloc(nfreq * ntime, sizeof(unsigned short int *));
................................................................................
	amp = new_amp;
	/* normalize, log transform and scale to dB */
	double max = 0.0;
	for (t = 0; t < ntime; ++t) for (f = 0; f < nfreq; ++f)
		if (amp[nfreq * t + f] > max) max = amp[nfreq * t + f];
	for (t = 0; t < ntime; ++t) for (f = 0; f < nfreq; ++f)
		amp[nfreq * t + f] = 10.0 * log10(amp[nfreq * t + f] / max);

	lines.setPrimitiveType(sf::LinesStrip);
	lines.resize(ntime);
	points.setPrimitiveType(sf::Quads);
	points.resize(ntime * 4);







	makeSpectrogram();
	makeThreshold();
	makeOverlay();
}

void Fft::makeSpectrogram() {
	int t, f;
................................................................................
	texSpec.loadFromImage(img);
	texSpec.setSmooth(true);
	spec = sf::Sprite(texSpec);
	spec.setScale(1.0,-1.0);
}

void Fft::makeOverlay() {
// TODO add fex calculation here?
//   * Change function name to "recalculate"?
	int t, f, fmax, n;;
	double max;

	for (t = 0, n = 0; t < ntime; ++t) {
		fmax = -1;
		max = std::numeric_limits<double>::lowest(); // TODO: is this negative?  Should it be?
		for (f = 0; f < nfreq; ++f) {
			if (erase[nfreq * t + f]) continue;
			if (amp[nfreq * t + f] < max) continue;
			max = amp[nfreq * t + (fmax=f)];
		}
		if (max < -1.0 * conf.threshold) continue;





		lines[n].position = sf::Vector2f(t + 0.5, - fmax - 0.5);
		points[4*n].position = sf::Vector2f(t, - fmax);
		points[4*n+1].position = sf::Vector2f(t + 1, - fmax);
		points[4*n+2].position = sf::Vector2f(t + 1, - fmax - 1);
		points[4*n+3].position = sf::Vector2f(t, - fmax - 1);
// TODO: These next lines should only need to be done once ... move to constructor?
		lines[n].color = conf.linesFG;
		points[4*n].texCoords = sf::Vector2f(0,0);
		points[4*n+1].texCoords = sf::Vector2f(64,0);
		points[4*n+2].texCoords = sf::Vector2f(64,64);
		points[4*n+3].texCoords = sf::Vector2f(0,64);
		++n;
	}
	for (; n < ntime; ++n) {

		lines[n].position = lines[n-1].position;
		points[4*n].position = sf::Vector2f(-2,0);
		points[4*n+1].position = sf::Vector2f(-2,0);
		points[4*n+2].position = sf::Vector2f(-2,0);
		points[4*n+3].position = sf::Vector2f(-2,0);
	}
}








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Blackman     0.42659   0.49656   0.076849  0.00
Nuttall      0.355768  0.487396  0.144232  0.012604
BlackNutt    0.3635819 0.4891775 0.1365995 0.0106411
BlackHarris  0.35875   0.48829   0.14128   0.01168

*/

Fft::Fft(int argc, char *const *argv) : Config(argc, argv) {
	song.loadFromFile(fname);
	ntime = song.getSampleCount() / conf.hop;
	nfreq = conf.winlen / 2 + 0.5;
	time = (double *) malloc(ntime * sizeof(double));
	freq = (double *) malloc(nfreq * sizeof(double));
	amp = (double *) malloc(nfreq * ntime * sizeof(double));
	erase = (unsigned short int *) calloc(nfreq * ntime, sizeof(unsigned short int *));
................................................................................
	amp = new_amp;
	/* normalize, log transform and scale to dB */
	double max = 0.0;
	for (t = 0; t < ntime; ++t) for (f = 0; f < nfreq; ++f)
		if (amp[nfreq * t + f] > max) max = amp[nfreq * t + f];
	for (t = 0; t < ntime; ++t) for (f = 0; f < nfreq; ++f)
		amp[nfreq * t + f] = 10.0 * log10(amp[nfreq * t + f] / max);
	/* prepare point and line overlays */
	lines.setPrimitiveType(sf::LinesStrip);
	lines.resize(ntime);
	points.setPrimitiveType(sf::Quads);
	points.resize(ntime * 4);
	for (t = 0; t < ntime; ++t) {
		lines[t].color = conf.linesFG;
		points[4*t].texCoords = sf::Vector2f(0,0);
		points[4*t+1].texCoords = sf::Vector2f(64,0);
		points[4*t+2].texCoords = sf::Vector2f(64,64);
		points[4*t+3].texCoords = sf::Vector2f(0,64);
	}
	makeSpectrogram();
	makeThreshold();
	makeOverlay();
}

void Fft::makeSpectrogram() {
	int t, f;
................................................................................
	texSpec.loadFromImage(img);
	texSpec.setSmooth(true);
	spec = sf::Sprite(texSpec);
	spec.setScale(1.0,-1.0);
}

void Fft::makeOverlay() {

//   * Change function name to "recalculate"?
	int t, f, fmax, n;;
	double max, pt, pf;
	pathLength = timeLength = 0.0;
	for (t = 0, n = 0; t < ntime; ++t) {
		fmax = -1;
		max = std::numeric_limits<double>::lowest(); // TODO: is this negative?  Should it be?
		for (f = 0; f < nfreq; ++f) {
			if (erase[nfreq * t + f]) continue;
			if (amp[nfreq * t + f] < max) continue;
			max = amp[nfreq * t + (fmax=f)];
		}
		if (max < -1.0 * conf.threshold) continue;
		if (n) { /* increment lengths for fex calculation for all but first point */
			pathLength += hypot(freq[fmax]-pf,time[t]-pt);
			timeLength += time[t]-pt;
		}
		pf = freq[fmax]; pt = time[t];
		lines[n].position = sf::Vector2f(t + 0.5, - fmax - 0.5);
		points[4*n].position = sf::Vector2f(t, - fmax);
		points[4*n+1].position = sf::Vector2f(t + 1, - fmax);
		points[4*n+2].position = sf::Vector2f(t + 1, - fmax - 1);
		points[4*n+3].position = sf::Vector2f(t, - fmax - 1);






		++n;
	}
	for (; n < ntime; ++n) {
		/* set remaining lines to last point and points to off screen */
		lines[n].position = lines[n-1].position;
		points[4*n].position = sf::Vector2f(-2,0);
		points[4*n+1].position = sf::Vector2f(-2,0);
		points[4*n+2].position = sf::Vector2f(-2,0);
		points[4*n+3].position = sf::Vector2f(-2,0);
	}
}

Changes to src/fft.hpp. 

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		unsigned short int *erase = NULL;
		sf::VertexArray points, lines;

	protected:
		sf::Sprite spec, thresh;
		sf::SoundBuffer song;
		int ntime, nfreq;


		void makeSpectrogram();
		void makeThreshold();
		void makeOverlay();
		sf::VertexArray const &getPoints() const { return points; };
		sf::VertexArray const &getLines() const { return lines; };

		void eraseShift();
		void erasePoint(int, int);
		void eraseUndo();

	public:
		Fft(int, const char **);
		~Fft();
};









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		unsigned short int *erase = NULL;
		sf::VertexArray points, lines;

	protected:
		sf::Sprite spec, thresh;
		sf::SoundBuffer song;
		int ntime, nfreq;
		double pathLength, timeLength;

		void makeSpectrogram();
		void makeThreshold();
		void makeOverlay();
		sf::VertexArray const &getPoints() const { return points; };
		sf::VertexArray const &getLines() const { return lines; };

		void eraseShift();
		void erasePoint(int, int);
		void eraseUndo();

	public:
		Fft(int, char *const *);
		~Fft();
};

Changes to src/spectrogram.cpp. 

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#include "spectrogram.hpp"

Spectrogram::Spectrogram(int argc, const char **argv) : Fft(argc, argv) {
//	if (getenv("FEX_FULLSCREEN"))
		win.create(sf::VideoMode::getDesktopMode(), "Fex", sf::Style::Fullscreen);
//	else
//		win.create(sf::VideoMode(640,480), "Fex");
	aspect = (ntime * win.getSize().y * conf.hop) / (float) (nfreq * win.getSize().x * conf.winlen);
	view.reset(sf::FloatRect(0, -nfreq * (1 + aspect)/2.0, ntime, nfreq * aspect));
	win.setView(view);
	spec.setColor(conf.specFG);
	sf::RenderTexture render_ball;
	render_ball.setSmooth(true);
	render_ball.create(64,64);
	sf::CircleShape dot(32);
	dot.setFillColor(conf.pointBG);
	dot.setOutlineColor(conf.pointFB);
	dot.setOutlineThickness(-8);
	render_ball.draw(dot);
	ball = render_ball.getTexture();
	back.setSize(sf::Vector2f(ntime,-nfreq));
	back.setFillColor(conf.specBG);
}

................................................................................
	sf::Event ev;
	while (win.isOpen() && win.waitEvent(ev)) {
		ev_handler(ev);
		while (win.pollEvent(ev)) ev_handler(ev);
		draw_main();
		if (show.cursor) draw_cursor();
		win.display();
	char out[256];
	snprintf(out,255,"%s - (%0.3fs, %0.3fKHz) FE: %lf ",
		name,
		song.getDuration().asSeconds() * mouse.x / ntime,
		conf.lopass - (conf.hipass - conf.lopass) * mouse.y / nfreq,
		1234.5
	);
	win.setTitle(sf::String(out));
	}

	return 0;
}

void Spectrogram::ev_handler(sf::Event ev) {
	switch (ev.type) {
		case sf::Event::Closed: ev_close(ev); break;
		case sf::Event::KeyPressed: ev_keypress(ev); break;
................................................................................
			view.reset(sf::FloatRect(0, -nfreq * (1 + aspect)/2.0, ntime, nfreq * aspect));
			break;
	}
}

void Spectrogram::ev_wheel(sf::Event ev) {
	if (ev.mouseWheelScroll.wheel == 0) { /* vertical */





		view.zoom(1.0 - 0.0075 * ev.mouseWheelScroll.delta);
		win.setView(view);
	}
}

/*
void Spectrogram::draw_hud() {




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#include "spectrogram.hpp"

Spectrogram::Spectrogram(int argc, char *const *argv) : Fft(argc, argv) {
//	if (getenv("FEX_FULLSCREEN"))
		win.create(sf::VideoMode::getDesktopMode(), "Fex", sf::Style::Fullscreen);
//	else
//		win.create(sf::VideoMode(640,480), "Fex");
	aspect = (ntime * win.getSize().y * conf.hop) / (float) (nfreq * win.getSize().x * conf.winlen);
	view.reset(sf::FloatRect(0, -nfreq * (1 + aspect)/2.0, ntime, nfreq * aspect));
	win.setView(view);
	spec.setColor(conf.specFG);
	sf::RenderTexture render_ball;
	render_ball.setSmooth(true);
	render_ball.create(64,64);
	sf::CircleShape dot(32);
	dot.setFillColor(conf.pointBG);
	dot.setOutlineColor(conf.pointFG);
	dot.setOutlineThickness(-8);
	render_ball.draw(dot);
	ball = render_ball.getTexture();
	back.setSize(sf::Vector2f(ntime,-nfreq));
	back.setFillColor(conf.specBG);
}

................................................................................
	sf::Event ev;
	while (win.isOpen() && win.waitEvent(ev)) {
		ev_handler(ev);
		while (win.pollEvent(ev)) ev_handler(ev);
		draw_main();
		if (show.cursor) draw_cursor();
		win.display();
		char out[256];
		snprintf(out,255,"%s - (%0.3fs, %0.3fKHz) FE: %lf ",
			name,
			song.getDuration().asSeconds() * mouse.x / ntime,
			conf.lopass - (conf.hipass - conf.lopass) * mouse.y / nfreq,
			1234.5
		);
		win.setTitle(sf::String(out));
	}
	printf("%lf\t%lf\t%lf\n", pathLength, timeLength, pathLength / timeLength);
	return 0;
}

void Spectrogram::ev_handler(sf::Event ev) {
	switch (ev.type) {
		case sf::Event::Closed: ev_close(ev); break;
		case sf::Event::KeyPressed: ev_keypress(ev); break;
................................................................................
			view.reset(sf::FloatRect(0, -nfreq * (1 + aspect)/2.0, ntime, nfreq * aspect));
			break;
	}
}

void Spectrogram::ev_wheel(sf::Event ev) {
	if (ev.mouseWheelScroll.wheel == 0) { /* vertical */
		// TODO, make 0.0075 step size customizable?
		float vx = view.getSize().x / ntime, vy = view.getSize().y / nfreq;
		float dx = ev.mouseWheelScroll.delta;
		if (dx < 0 && vx > 1.20 && vy > 1.20) return;
		if (dx > 0 && vx < 0.01 && vy > 0.01) return;
		view.zoom(1.0 - 0.0075 * ev.mouseWheelScroll.delta);
		win.setView(view);
	}
}

/*
void Spectrogram::draw_hud() {

Changes to src/spectrogram.hpp. 

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		void ev_resize(sf::Event);
		void ev_button(sf::Event);
		void ev_wheel(sf::Event);
	protected:
		void listen(float=1.0);
	public:
		int main_loop();
		Spectrogram(int, const char **);
		~Spectrogram();
};









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		void ev_resize(sf::Event);
		void ev_button(sf::Event);
		void ev_wheel(sf::Event);
	protected:
		void listen(float=1.0);
	public:
		int main_loop();
		Spectrogram(int, char *const *);
		~Spectrogram();
};