tools/dom/templates/html/impl/impl_AudioContext.darttemplate

// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

part of web_audio;

$(ANNOTATIONS)$(NATIVESPEC)$(CLASS_MODIFIERS)class $CLASSNAME$EXTENDS$IMPLEMENTS {
$!MEMBERS
  factory AudioContext() => JS('AudioContext',
      'new (window.AudioContext || window.webkitAudioContext)()');

  GainNode createGain() {
    if (JS('bool', '#.createGain !== undefined', this)) {
      return JS('GainNode', '#.createGain()', this);
    } else {
      return JS('GainNode', '#.createGainNode()', this);
    }
  }

  ScriptProcessorNode createScriptProcessor(int bufferSize,
      [int numberOfInputChannels, int numberOfOutputChannels]) {
    var function = JS('=Object', '#.createScriptProcessor || '
        '#.createJavaScriptNode', this, this);
    if (numberOfOutputChannels != null) {
      return JS('ScriptProcessorNode', '#.call(#, #, #, #)', function, this,
          bufferSize, numberOfInputChannels, numberOfOutputChannels);
    } else if (numberOfInputChannels != null) {
      return JS('ScriptProcessorNode', '#.call(#, #, #)', function, this,
          bufferSize, numberOfInputChannels);
    } else {
      return JS('ScriptProcessorNode', '#.call(#, #)', function, this,
          bufferSize);
    }
  }

  @JSName('decodeAudioData')
  @DomName('AudioContext.decodeAudioData')
  @DocsEditable()
  Future _decodeAudioData(ByteBuffer audioData,
      [AudioBufferCallback successCallback,
      AudioBufferCallback errorCallback]) native;

  @DomName('AudioContext.decodeAudioData')
  Future<AudioBuffer> decodeAudioData(ByteBuffer audioData) {
    var completer = new Completer<AudioBuffer>();
    _decodeAudioData(audioData,
        (value) { completer.complete(value); },
        (error) {
          if (error == null) {
            completer.completeError('');
          } else {
            completer.completeError(error);
          }
        });
    return completer.future;
  }
}