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@RobDangerous @sh-dave @AoE-Maniac
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package kha.audio2;
import js.Browser;
import js.html.URL;
import js.html.audio.AudioContext;
import js.html.audio.AudioProcessingEvent;
import js.html.audio.ScriptProcessorNode;
import kha.internal.IntBox;
import kha.js.AEAudioChannel;
import kha.Sound;
class Audio {
public static var disableGcInteractions = false;
static var intBox: IntBox = new IntBox(0);
private static var buffer: Buffer;
@:noCompletion public static var _context: AudioContext;
private static var processingNode: ScriptProcessorNode;
private static function initContext(): Void {
try {
_context = new AudioContext();
return;
}
catch (e: Dynamic) {
}
try {
untyped __js__('this._context = new webkitAudioContext();');
return;
}
catch (e: Dynamic) {
}
}
@:noCompletion
public static function _init(): Bool {
initContext();
if (_context == null) return false;
Audio.samplesPerSecond = Math.round(_context.sampleRate);
var bufferSize = 1024 * 2;
buffer = new Buffer(bufferSize * 4, 2, Std.int(_context.sampleRate));
processingNode = _context.createScriptProcessor(bufferSize, 0, 2);
processingNode.onaudioprocess = function (e: AudioProcessingEvent) {
var output1 = e.outputBuffer.getChannelData(0);
var output2 = e.outputBuffer.getChannelData(1);
if (audioCallback != null) {
intBox.value = e.outputBuffer.length * 2;
audioCallback(intBox, buffer);
for (i in 0...e.outputBuffer.length) {
output1[i] = buffer.data.get(buffer.readLocation);
buffer.readLocation += 1;
output2[i] = buffer.data.get(buffer.readLocation);
buffer.readLocation += 1;
if (buffer.readLocation >= buffer.size) {
buffer.readLocation = 0;
}
}
}
else {
for (i in 0...e.outputBuffer.length) {
output1[i] = 0;
output2[i] = 0;
}
}
}
processingNode.connect(_context.destination);
return true;
}
public static var samplesPerSecond: Int;
public static var audioCallback: kha.internal.IntBox->Buffer->Void;
static var virtualChannels: Array<VirtualStreamChannel> = [];
public static function wakeChannels() {
SystemImpl.mobileAudioPlaying = true;
for (channel in virtualChannels) {
channel.wake();
}
}
public static function stream(sound: Sound, loop: Bool = false): kha.audio1.AudioChannel {
//var source = _context.createMediaStreamSource(cast sound.compressedData.getData());
//source.connect(_context.destination);
var element = Browser.document.createAudioElement();
#if kha_debug_html5
var blob = new js.html.Blob([sound.compressedData.getData()], {type: "audio/ogg"});
#else
var blob = new js.html.Blob([sound.compressedData.getData()], {type: "audio/mp4"});
#end
element.src = URL.createObjectURL(blob);
element.loop = loop;
var channel = new AEAudioChannel(element, loop);
if (SystemImpl.mobileAudioPlaying) {
channel.play();
return channel;
}
else {
var virtualChannel = new VirtualStreamChannel(channel, loop);
virtualChannels.push(virtualChannel);
return virtualChannel;
}
}
}
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