|
|
|
|
@ -40,6 +40,18 @@ function SoundManager(core) { |
|
|
|
|
this.gainNode = null; |
|
|
|
|
this.mute = false; |
|
|
|
|
this.lastVol = 1; |
|
|
|
|
|
|
|
|
|
// Visualiser
|
|
|
|
|
this.vReady = false; |
|
|
|
|
this.vBars = 0; |
|
|
|
|
this.splitter = null; |
|
|
|
|
this.analysers = []; |
|
|
|
|
this.analyserArrays = []; |
|
|
|
|
this.logArrays = []; |
|
|
|
|
this.binCutoffs = []; |
|
|
|
|
this.linBins = 0; |
|
|
|
|
this.logBins = 0; |
|
|
|
|
this.maxBinLin = 0; |
|
|
|
|
|
|
|
|
|
// For concatenating our files
|
|
|
|
|
this.leftToLoad = 0; |
|
|
|
|
@ -124,9 +136,9 @@ SoundManager.prototype.playSong = function(song, playBuild, callback) { |
|
|
|
|
that.startTime = that.context.currentTime; |
|
|
|
|
} |
|
|
|
|
that.context.resume().then(function() { |
|
|
|
|
that.playing = true; |
|
|
|
|
if(callback) |
|
|
|
|
callback(); |
|
|
|
|
that.playing = true; |
|
|
|
|
}); |
|
|
|
|
}); |
|
|
|
|
} else { |
|
|
|
|
@ -138,9 +150,9 @@ SoundManager.prototype.playSong = function(song, playBuild, callback) { |
|
|
|
|
that.bufSource.start(0, that.loopStart); |
|
|
|
|
that.startTime = that.context.currentTime; |
|
|
|
|
} |
|
|
|
|
that.playing = true; |
|
|
|
|
if(callback) |
|
|
|
|
callback(); |
|
|
|
|
that.playing = true; |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
}); |
|
|
|
|
@ -152,6 +164,7 @@ SoundManager.prototype.stop = function() { |
|
|
|
|
this.bufSource.stop(0); |
|
|
|
|
this.bufSource.disconnect(); // TODO needed?
|
|
|
|
|
this.bufSource = null; |
|
|
|
|
this.vReady = false; |
|
|
|
|
this.playing = false; |
|
|
|
|
this.startTime = 0; |
|
|
|
|
this.loopStart = 0; |
|
|
|
|
@ -302,6 +315,118 @@ SoundManager.prototype.concatenateAudioBuffers = function(buffer1, buffer2) { |
|
|
|
|
return tmp; |
|
|
|
|
}; |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
SoundManager.prototype.initVisualiser = function(bars) { |
|
|
|
|
if(!bars) { |
|
|
|
|
return; |
|
|
|
|
} |
|
|
|
|
this.vReady = false; |
|
|
|
|
this.vBars = bars; |
|
|
|
|
for(var i = 0; i < this.analysers.length; i++) { |
|
|
|
|
this.analysers[i].disconnect(); |
|
|
|
|
} |
|
|
|
|
if(this.splitter) { |
|
|
|
|
this.splitter.disconnect(); |
|
|
|
|
this.splitter = null; |
|
|
|
|
} |
|
|
|
|
this.analysers = []; |
|
|
|
|
this.analyserArrays = []; |
|
|
|
|
this.logArrays = []; |
|
|
|
|
this.binCutoffs = []; |
|
|
|
|
|
|
|
|
|
this.linBins = 0; |
|
|
|
|
this.logBins = 0; |
|
|
|
|
this.maxBinLin = 0; |
|
|
|
|
|
|
|
|
|
this.attachVisualiser(); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
SoundManager.prototype.attachVisualiser = function() { |
|
|
|
|
if(!this.playing || this.vReady) { |
|
|
|
|
return; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
var channels = this.bufSource.channelCount; |
|
|
|
|
// In case channel counts change, this is changed each time
|
|
|
|
|
this.splitter = this.context.createChannelSplitter(channels); |
|
|
|
|
this.bufSource.connect(this.splitter); |
|
|
|
|
// Split display up into each channel
|
|
|
|
|
this.vBars = Math.floor(this.vBars/channels); |
|
|
|
|
|
|
|
|
|
for(var i = 0; i < channels; i++) { |
|
|
|
|
var analyser = this.context.createAnalyser(); |
|
|
|
|
// big fft buffers are new-ish
|
|
|
|
|
try { |
|
|
|
|
analyser.fftSize = 8192; |
|
|
|
|
} catch(err) { |
|
|
|
|
analyser.fftSize = 2048; |
|
|
|
|
} |
|
|
|
|
// Chosen because they look nice, no maths behind it
|
|
|
|
|
analyser.smoothingTimeConstant = 0.6; |
|
|
|
|
analyser.minDecibels = -70; |
|
|
|
|
analyser.maxDecibels = -25; |
|
|
|
|
this.analyserArrays.push(new Uint8Array(analyser.frequencyBinCount)); |
|
|
|
|
analyser.getByteTimeDomainData(this.analyserArrays[i]); |
|
|
|
|
this.splitter.connect(analyser, i);
|
|
|
|
|
this.analysers.push(analyser); |
|
|
|
|
this.logArrays.push(new Uint8Array(this.vBars)); |
|
|
|
|
} |
|
|
|
|
var binCount = this.analysers[0].frequencyBinCount; |
|
|
|
|
var binWidth = this.bufSource.buffer.sampleRate / binCount; |
|
|
|
|
// first 2kHz are linear
|
|
|
|
|
this.maxBinLin = Math.floor(2000/binWidth); |
|
|
|
|
// Don't stretch the first 2kHz, it looks awful
|
|
|
|
|
this.linBins = Math.min(this.maxBinLin, Math.floor(this.vBars/2)); |
|
|
|
|
// Only go up to 22KHz
|
|
|
|
|
var maxBinLog = Math.floor(22000/binWidth); |
|
|
|
|
var logBins = this.vBars - this.linBins; |
|
|
|
|
console.log("Going to compress", this.maxBinLin,
|
|
|
|
|
"bins into", this.linBins, "linear bins"); |
|
|
|
|
console.log("Going to compress", maxBinLog-this.linBins,
|
|
|
|
|
"bins into", logBins, "logarithmic bins"); |
|
|
|
|
|
|
|
|
|
var logLow = Math.log2(2000); |
|
|
|
|
var logDiff = Math.log2(22000) - logLow; |
|
|
|
|
for(var i = 0; i < logBins; i++) { |
|
|
|
|
var cutoff = i * (logDiff/logBins) + logLow; |
|
|
|
|
var freqCutoff = Math.pow(2, cutoff); |
|
|
|
|
var binCutoff = Math.floor(freqCutoff / binWidth); |
|
|
|
|
this.binCutoffs.push(binCutoff); |
|
|
|
|
} |
|
|
|
|
this.vReady = true; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
SoundManager.prototype.sumArray = function(array, low, high) { |
|
|
|
|
var total = 0; |
|
|
|
|
for(var i = low; i <= high; i++) { |
|
|
|
|
total += array[i]; |
|
|
|
|
} |
|
|
|
|
return total/(high-low+1); |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
SoundManager.prototype.getVisualiserData = function() { |
|
|
|
|
if(!this.vReady) { |
|
|
|
|
return null; |
|
|
|
|
} |
|
|
|
|
for(var a = 0; a < this.analyserArrays.length; a++) { |
|
|
|
|
var data = this.analyserArrays[a]; |
|
|
|
|
var result = this.logArrays[a]; |
|
|
|
|
this.analysers[a].getByteFrequencyData(data); |
|
|
|
|
|
|
|
|
|
for(var i = 0; i < this.linBins; i++) { |
|
|
|
|
var scaled = Math.round(i * this.maxBinLin / this.linBins); |
|
|
|
|
result[i] = data[scaled]; |
|
|
|
|
} |
|
|
|
|
result[this.linBins] = data[this.binCutoffs[0]]; |
|
|
|
|
for(var i = this.linBins+1; i < this.vBars; i++) { |
|
|
|
|
var cutoff = i - this.linBins; |
|
|
|
|
result[i] = this.sumArray(data, this.binCutoffs[cutoff-1],
|
|
|
|
|
this.binCutoffs[cutoff]); |
|
|
|
|
} |
|
|
|
|
} |
|
|
|
|
return this.logArrays; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
SoundManager.prototype.setMute = function(mute) { |
|
|
|
|
if(!this.mute && mute) { // muting
|
|
|
|
|
this.lastVol = this.gainNode.gain.value; |
|
|
|
|
|
William Toohey
10 years ago