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getByteFrequencyDataAverage = function() { | |
analyser.getByteFrequencyData(frequencies); | |
var max_hz = 0; | |
var max_hz_value = 0.0; | |
for(var i = 0; i < bufferLength; i++) { | |
if(max_hz_value < frequencies[i]) { | |
max_hz_value = frequencies[i]; | |
max_hz = i; | |
} | |
} | |
return max_hz; | |
}; | |
var shakitta_hz_array = [ | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
250, | |
]; | |
//誤差は 5hz | |
var t_hz = 50 | |
//合格率は 8割 | |
var t_match = shakitta_hz_array.length * 0.8; | |
// シャキったかどうかの判別 | |
function is_shakitta(f_array){ | |
var match_count = 0; | |
for (var i = 0; i < shakitta_hz_array.length; i++) { | |
if(f_array[i] <= shakitta_hz_array[i] + t_hz && | |
f_array[i] >= shakitta_hz_array[i] - t_hz | |
){ | |
match_count++; | |
} | |
} | |
//console.log(f_array[0]); | |
if(match_count >= t_match){ | |
return true; | |
} else { | |
return false; | |
} | |
} | |
elVolume = document.getElementById('volume'); | |
var buffer_hz =[ | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0, | |
0 | |
]; | |
var count = 0; | |
var flag = true; | |
(draw = function() { | |
var hz = Math.floor(getByteFrequencyDataAverage()); | |
for (var i=1; i<buffer_hz.length; i++) { | |
buffer_hz[i-1] = buffer_hz[i]; | |
} | |
buffer_hz[buffer_hz.length-1] = hz; | |
if (is_shakitta(buffer_hz)) { | |
elVolume.innerHTML = "シャキった"; | |
flag = false; | |
} else { | |
if(flag) { | |
elVolume.innerHTML = "シャキってない"; | |
} else { | |
elVolume.innerHTML = "シャキった後"; | |
} | |
} | |
requestAnimationFrame(draw); | |
})(); |
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