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var song;
var emu8910 = new PSG49(YM_CLOCK_ZX, 50);
Array.prototype.shuffle = function() {
var m = this.length, t, i;
while(m) {
i = Math.floor(Math.random() * m--);
t = this[m];
this[m] = this[i];
this[i] = t;
}
return this;
}
var songs = [
"01_scalesmannmisfire.fym"
].shuffle();
var currentSong = 0;
loadAndPlay = function() {
emu8910.driver.device.resume()
var oReq = new XMLHttpRequest();
oReq.open('GET', 'music/' + songs[currentSong], true);
oReq.responseType = 'arraybuffer';
oReq.onload = function(e) {
if(oReq.response) play(oReq.response);
}
oReq.send();
}
updateState = function() {
var r = song.getNextFrame();
emu8910.register.A_FINE = r[0];
emu8910.register.A_COARSE = r[1];
emu8910.register.B_FINE = r[2];
emu8910.register.B_COARSE = r[3];
emu8910.register.C_FINE = r[4];
emu8910.register.C_COARSE = r[5];
emu8910.register.NOISE_PERIOD = r[6];
var mix_tone_A = (r[7] & 1) << 0;
var mix_tone_B = ((r[7] >> 1) & 1) << 1;
var mix_tone_C = ((r[7] >> 2) & 1) << 2;
var mix_noise_A = ((r[7] >> 3) & 1) << 3;
var mix_noise_B = ((r[7] >> 4) & 1) << 4;
var mix_noise_C = ((r[7] >> 5) & 1) << 5;
var MIXER = (mix_tone_A | mix_tone_B | mix_tone_C
| mix_noise_A | mix_noise_B | mix_noise_C);
emu8910.register.MIXER = MIXER;
emu8910.register.A_VOL = r[8];
emu8910.register.B_VOL = r[9];
emu8910.register.C_VOL = r[10];
emu8910.register.ENV_FINE = r[11];
emu8910.register.ENV_COURSE = r[12];
if (r[13] != 0xff) {
emu8910.register.ENV_SHAPE = r[13];
}
}
play = function(fym) {
song = new FYMReader(fym);
emu8910.interrupt.routine = updateState;
emu8910.clock.frequency = song.getClockRate()
emu8910.interrupt.frequency = song.getFrameRate()
}
document.addEventListener('click', loadAndPlay, false);
document.addEventListener('touchend', loadAndPlay, false);
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