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chrouspreview.js
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chrouspreview.js
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function chrouspreview1(){
clearInterval(intervalid);
clearInterval(intervalid12);
clearInterval(videointerval)
var start = parseFloat(document.getElementById("start").value);
var end = parseFloat(document.getElementById("end").value);
var depth = parseFloat(document.getElementById("depth").value)
var rate = parseFloat(document.getElementById("rate").value)
var gainselect = document.getElementById("gainselect").value;
time = parseInt(start);
var final = end - start;
if (sourcecheck === null){
if(source){
source.stop();
}
if(source1){
source1.stop();
}
}
if (check === null ){
document.getElementById("error").innerHTML = "Please select a file"
}
else if (bufferarray===null){
document.getElementById("error").innerHTML = "No data available"
}
else if (isNaN(start)){
document.getElementById("error").innerHTML = "Starting point is not a number"
}
else if (start >= source.buffer.duration){
document.getElementById("error").innerHTML = "starting point is greater than or equal to source buffer duration"
}
else if (start < 0 )
{
document.getElementById("error").innerHTML = "Starting Point must be greater than 0"
}
else if (start >= end) {
document.getElementById("error").innerHTML = "Starting Point must be less than Ending Point"
}
else if (isNaN(end)){
document.getElementById("error").innerHTML = "Ending Point is not a number"
}
else if ( end > source.buffer.duration ){
document.getElementById("error").innerHTML = "Ending point is greater than duration"
end < 0 }
else if ( end <= start){
document.getElementById("error").innerHTML = "Ending Point is greater than equal to Starting Point"
}
else if (isNaN(depth)||isNaN(rate)){
}
else{
const offlineCtx = new AudioContext();
var array1 = new Float32Array(end*bufferarray.sampleRate -start*bufferarray.sampleRate)
bufferarray.copyFromChannel(array1, 0, start*bufferarray.sampleRate)
var sourcebuffer = offlineCtx.createBuffer(bufferarray.numberOfChannels, array1.length, bufferarray.sampleRate);
var channeldata = sourcebuffer.getChannelData(0)
channeldata.set(array1)
source1 = offlineCtx.createBufferSource();
source1.buffer = sourcebuffer;
const delayNode = offlineCtx.createDelay();
// Create a low-frequency oscillator (LFO) to modulate the delay time
const lfo = offlineCtx.createOscillator();
if(chrousselect === "triangle"){
lfo.type = 'triangle';
}
else if(chrousselect === "square"){
lfo.type = 'square';
}
else if(chrousselect === "sawtooth"){
lfo.type = 'sawtooth';
}
else {
lfo.type = 'sine';
}
lfo.frequency.value = rate; // Modulation rate in Hz
// Create a gain node to control the depth of the modulation
const depthNode = offlineCtx.createGain();
depthNode.gain.value = depth; // Modulation depth
// Connect the nodes to create the chorus effect
source1.connect(delayNode);
source1.connect(offlineCtx.destination);
delayNode.connect(offlineCtx.destination);
lfo.connect(depthNode);
depthNode.connect(delayNode.delayTime);
lfo.start();
// Schedule the playback
source1.start(0);
}}