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compressorpreview.js
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compressorpreview.js
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var newsource;
function compressorpreview1(){
clearInterval(intervalid);
clearInterval(intervalid12);
clearInterval(videointerval)
var start = parseFloat(document.getElementById("start").value);
var end = parseFloat(document.getElementById("end").value);
var threshold= parseFloat(document.getElementById("threshold").value);
var knee = parseFloat(document.getElementById("knee").value);
var ratio = parseFloat(document.getElementById("ratio").value)
var attack = parseFloat(document.getElementById("attack").value)
var release = document.getElementById("release").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{
var newbuffer = audiocontext.createBuffer(bufferarray.numberOfChannels, bufferarray.length, bufferarray.sampleRate)
var ab3 = newbuffer.getChannelData(0)
ab3.set(bufferarray.getChannelData(0), 0)
if (bufferarray.numberOfChannels>1){
var ab4 = newbuffer.getChannelData(1)
ab4.set(bufferarray.getChannelData(1), 0)
}
if (undo.length ===3){
undo.splice(0, 1)
}
undo.push(newbuffer);
const offlineCtx = new AudioContext();
var array1 = new Float32Array(end*bufferarray.sampleRate -start*bufferarray.sampleRate)
var array5;
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();
const compressorNode = offlineCtx.createDynamicsCompressor();
if(isNaN(threshold)){
}
else{
compressorNode.threshold.value = threshold;
}
if(isNaN(knee)){
}
else{
compressorNode.knee.value = knee;
}
if(isNaN(ratio)){
}
else{
compressorNode.ratio.value = ratio;
}
if(isNaN(attack)){
}
else{
compressorNode.attack.value = attack;
}
if(isNaN(release)){
}
else{
compressorNode.release.value = release;
}
source1.buffer = sourcebuffer;
source1.connect(compressorNode)
compressorNode.connect(offlineCtx.destination)
source1.start(0)
source1.stop(array1.length/bufferarray.sampleRate)
}}