Fex

- eraser control (toggle on / off)
	- bring back "modes"?
x Add eraser function to spectrogram module
	- needs testing


- Too many "magic numbers" for eraser sizes...
x Implement config file reading
	* offloaded to pyfex
	* fex only uses command line parameters
	* this makes porting across platforms easier
		* at least for me: I have no idea where a Win user would keep config files.

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

[colors]
window background          = #606468FF
spectrogram background     = #FFFFFFFF
spectrogram foreground     = #000000FF
threshold                  = #58749848
point border               = #3399FFFF
point fill                 = #3399FF48
lines                      = #E86850FF
cursor                     = #FF0000AA

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

[sparrow]
match path                 = sparrow
threshold                  = 24.00

	'./fex',
	'--winSize=' +    conf['window length'],
	'--binSize=' +    conf['bin size'],
	'--loPass=' +     conf['low pass'],
	'--hiPass=' +     conf['high pass'],
	'--threshold=' +  conf['threshold'],
	'--floor=' +      conf['floor'],
	'--log10=' +      conf['log transform'],
	'--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']
	'--cursorFG=' +   col['cursor']
]

def run_fex(files):
	if len(files) == 0:
		print("zero")
		# prompt with dialog returning list of files
		# run_fex(list of files)

	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);
}

bool toBool(char *str) {
	switch (str[0]) {
		case 'T': case 't': case '1': case 'Y': case 'y': return true; break;
		case 'F': case 'f': case '0': case 'N': case 'n': return false; break;
		default: return false;
	}
}

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 },
		{ "log10",       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 },
		{ "cursorFG",    optional_argument, 0, 0 },
		{0,              0,                 0, 0 }
	};
	int i, c, index;
	char noarg[] = "";
	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.log10      = toBool(optarg);
		else if (index == 7)  conf.winBG      = toColor(optarg);
		else if (index == 8)  conf.specBG     = toColor(optarg);
		else if (index == 9)  conf.specFG     = toColor(optarg);
		else if (index == 10) conf.threshFG   = toColor(optarg);
		else if (index == 11) conf.pointBG    = toColor(optarg);
		else if (index == 12) conf.pointFG    = toColor(optarg);
		else if (index == 13) conf.linesFG    = toColor(optarg);
		else if (index == 14) conf.cursorFG   = 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);
}

		struct {
			int winlen           = 256;
			int hop              = 64;
			double lopass        = 01.25;
			double hipass        = 10.00;
			double threshold     = 18.00;
			double floor         = 24.00;
			bool log10           = false;
			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);

		for (f = f1; f < f2; ++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 */
			if (conf.log10) pathLength += hypot(log10(freq[fmax])-log10(pf),time[t]-pt);
			else 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);