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play.js
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play.js
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function play(){
clearInterval(intervalid);
var start = parseFloat(document.getElementById("start").value);
var end = parseFloat(document.getElementById("end").value);
time = parseInt(start);
var final = end - start;
if (sourcecheck === null){
if(source){
source.stop();
}
if (waveformsource){
waveformsource.stop();
}
}
if (check === null ){
document.getElementById("error").innerHTML = "Please select a file"
}
else if (array===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{
document.getElementById("timer").innerHTML = time;
source = audiocontext.createBufferSource();
var array1 = new Float32Array(array);
var audiobuffer = audiocontext.createBuffer(1, array.length, audiocontext.sampleRate);
var ab1= audiobuffer.getChannelData(0);
ab1.set(array);
source.buffer=audiobuffer;
source.connect(audiocontext.destination);
source.start(0, start, final);
document.getElementById("duration").innerHTML = source.buffer.duration.toFixed(3);
if (parseInt(start) != parseInt(end)){
intervalid = setInterval(()=>{
time++;
document.getElementById("timer").innerHTML = time;
if (time === parseInt(end)){
clearInterval(intervalid);
}
}, 1000);
}}
}