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