Initial WebAudio API stubs

components/script/dom/webidls/BaseAudioContext.webidl

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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+/*
+ * The origin of this IDL file is
+ * https://webaudio.github.io/web-audio-api/#BaseAudioContext
+ */
+
+enum AudioContextState {
+  "suspended",
+  "running",
+  "closed"
+};
+
+// callback DecodeErrorCallback = void (DOMException error);
+// callback DecodeSuccessCallback = void (AudioBuffer decodedData);
+
+[Exposed=Window]
+interface BaseAudioContext : EventTarget {
+  readonly attribute AudioDestinationNode destination;
+  readonly attribute float sampleRate;
+  readonly attribute double currentTime;
+  // readonly attribute AudioListener        listener;
+  // readonly attribute AudioContextState    state;
+  Promise<void> resume();
+  attribute EventHandler onstatechange;
+  // AudioBuffer            createBuffer(unsigned long numberOfChannels,
+  //                                     unsigned long length,
+  //                                     float sampleRate);
+  // Promise<AudioBuffer>   decodeAudioData(ArrayBuffer audioData,
+  //                                        optional DecodeSuccessCallback successCallback,
+  //                                        optional DecodeErrorCallback errorCallback);
+  // AudioBufferSourceNode  createBufferSource();
+  // ConstantSourceNode     createConstantSource();
+  // ScriptProcessorNode    createScriptProcessor(optional unsigned long bufferSize = 0,
+  //                                              optional unsigned long numberOfInputChannels = 2,
+  //                                             optional unsigned long numberOfOutputChannels = 2);
+  // AnalyserNode           createAnalyser();
+  // GainNode               createGain();
+  // DelayNode              createDelay(optional double maxDelayTime = 1);
+  // BiquadFilterNode       createBiquadFilter();
+  // IIRFilterNode          createIIRFilter(sequence<double> feedforward,
+  //                                        sequence<double> feedback);
+  // WaveShaperNode         createWaveShaper();
+  // PannerNode             createPanner();
+  // StereoPannerNode       createStereoPanner();
+  // ConvolverNode          createConvolver();
+  // ChannelSplitterNode    createChannelSplitter(optional unsigned long numberOfOutputs = 6);
+  // ChannelMergerNode      createChannelMerger(optional unsigned long numberOfInputs = 6);
+  // DynamicsCompressorNode createDynamicsCompressor();
+  // OscillatorNode         createOscillator();
+  // PeriodicWave           createPeriodicWave(sequence<float> real,
+  //                                           sequence<float> imag,
+  //                                           optional PeriodicWaveConstraints constraints);
+};