Mercurial > hg > webaudioevaluationtool
changeset 8:a6364db4c2ea
All tracks start muted. Clicking on sliders un-mutes that track. All tracks loop until stopped
| author | Nicholas Jillings <nicholas.jillings@eecs.qmul.ac.uk> |
|---|---|
| date | Wed, 25 Mar 2015 12:56:42 +0000 |
| parents | 6a6272b06d34 |
| children | 8343b2ba7ce7 |
| files | ape.js core.js |
| diffstat | 2 files changed, 24 insertions(+), 1 deletions(-) [+] |
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--- a/ape.js Wed Mar 25 12:48:29 2015 +0000 +++ b/ape.js Wed Mar 25 12:56:42 2015 +0000 @@ -155,6 +155,14 @@ trackSliderObj.style.float = "left"; trackSliderObj.draggable = true; trackSliderObj.ondragend = dragEnd; + + // Onclick, switch playback to that track + trackSliderObj.onclick = function() { + // Get the track ID from the object ID + var id = Number(this.id.substr(13,2)); // Maximum theoretical tracks is 99! + audioEngineContext.selectedTrack(id); + } + canvas.appendChild(trackSliderObj); })
--- a/core.js Wed Mar 25 12:48:29 2015 +0000 +++ b/core.js Wed Mar 25 12:56:42 2015 +0000 @@ -121,6 +121,18 @@ } } + this.selectedTrack = function(id) { + for (var i=0; i<this.audioObjects.length; i++) + { + if (id == i) { + this.audioObjects[i].outputGain.gain.value = 1.0; + } else { + this.audioObjects[i].outputGain.gain.value = 0.0; + } + } + } + + this.newTrack = function(url) { // Pull data from given URL into new audio buffer // URLs must either be from the same source OR be setup to 'Access-Control-Allow-Origin' @@ -145,6 +157,9 @@ this.bufferNode = audioContext.createBufferSource(); this.outputGain = audioContext.createGain(); + // Default output gain to be zero + this.outputGain.gain.value = 0.0; + // Connect buffer to the audio graph this.bufferNode.connect(this.outputGain); this.outputGain.connect(audioEngineContext.outputGain); @@ -164,7 +179,7 @@ this.bufferNode.buffer = this.buffer; this.bufferNode.loop = true; } - + this.constructTrack = function(url) { var request = new XMLHttpRequest(); request.open('GET',url,true);