SAO Utils 2的音频可视化插件
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import QtQuick 2.12
import QtQuick.Controls 2.12
import "../../qml/api"
StyleAPI {
readonly property var audioData: new Array(128)
//configs
readonly property string color: configs["Main Color"]
readonly property int linePosition: configs["Line Position"]
readonly property real lineWidth: configs["Line Width"]
readonly property real maxRange: configs["Max Range"] / 100
readonly property int uDataLen: Math.pow(2, configs["Data Length"])
readonly property int dataLength: 64/uDataLen
readonly property int channel: configs["Channel"]
readonly property bool reverse: configs["Reverse"]
readonly property bool rotateFlag: configs["Rotate"]
readonly property real rSpeed: configs["Ratate Speed"] / 100
readonly property real angle: configs["Angle"]
readonly property bool autoNormalizing: configs["Data Settings"]["Auto Normalizing"]
readonly property real amplitude: configs["Data Settings"]["Amplitude"] / 400
readonly property int unitStyle: configs["Data Settings"]["Unit Style"]
readonly property int total: channel*dataLength
readonly property real dotGap: 360/total
property real offsetAngle: 0
property var outerPos: []
property var innerPos: []
readonly property real degUnit: Math.PI/180
readonly property real subRatio: 0.2*maxRange
readonly property real mainRatio: 1-subRatio*2.5
readonly property real minLength: Math.min(width, height)
readonly property real ratio:minLength*subRatio
readonly property real halfWidth: width/2
readonly property real halfHeight: height/2
readonly property real halfMinLength: minLength/2
readonly property real logAmplitude: Math.log10(amplitude)
onConfigsUpdated: {
context.lineWidth = lineWidth;
context.strokeStyle = color;
}
function getPos(r, deg) {
return [halfWidth+Math.cos(deg)*r,halfHeight+Math.sin(deg)*r];
}
function createPoint() {
outerPos = [];
innerPos = [];
let deg, deltaR, r1, r2, _rhmLen;
_rhmLen = mainRatio*halfMinLength;
for (let j=0; j < channel; j++) {
for (let i=0; i < dataLength; i++) {
deg = degUnit*((i+j*dataLength)*dotGap + offsetAngle);
deltaR = audioData[reverse*(dataLength-i-1)+(!reverse)*(i+j*dataLength)] * ratio;
r1 = _rhmLen+1+deltaR*(linePosition!==2);
r2 = _rhmLen-1-deltaR*(linePosition!==1);
outerPos.push(getPos(r1, deg));
innerPos.push(getPos(r2, deg));
}
}
offsetAngle = rotateFlag ? ((offsetAngle + rSpeed) % 360) : angle;
}
onAudioDataUpdeted: {
if(autoNormalizing) {
if (unitStyle) {
//对数化显示
let logPeak = Math.log10(data[128]);
for(let i=0; i<total; i++) {
audioData[i] = 0;
for(let j=0; j<uDataLen; j++) {
audioData[i] += Math.max(0, 0.4 * (Math.log10(data[i*uDataLen+j])-logPeak) + 1.0);
}
audioData[i] /= uDataLen;
}
} else {
//线性化显示
for(let i=0; i<total; i++) {
audioData[i] = 0;
for(let j=0; j<uDataLen; j++) {
audioData[i] += data[i*uDataLen+j] / data[128];
}
audioData[i] /= uDataLen;
}
}
} else {
if (unitStyle) {
//对数化显示
for(let i=0; i<total; i++) {
audioData[i] = 0;
for(let j=0; j<uDataLen; j++) {
audioData[i] += Math.max(0, 0.35 * (Math.log10(data[i*uDataLen+j])+logAmplitude) + 1.0);
}
audioData[i] /= uDataLen;
}
} else {
//线性化显示
for(let i=0; i<total; i++) {
audioData[i] = 0;
for(let j=0; j<uDataLen; j++) {
audioData[i] += data[i*uDataLen+j] * amplitude;
}
audioData[i] /= uDataLen;
}
}
}
context.clearRect(0, 0, width, height);
createPoint();
context.beginPath();
for(let i=0; i<total; i++) {
context.moveTo(outerPos[i][0], outerPos[i][1]);
context.lineTo(innerPos[i][0], innerPos[i][1]);
}
context.stroke();
requestPaint();
}
Component.onCompleted: {
for (let i = 0; i < 128; i++) {
audioData[i] = 0;
}
}
}