fix various type errors (#6)

- suspend() isn't defined on BaseAudioContext
- AudioScheduledSourceNode.start() takes an optional offset/duration
- AudioNode.channelDidUpdate() takes a numberOfChannels param

Author: marcello3d

src/__tests__/api/AudioContext.js renamed to src/__tests__/api/BaseAudioContext.js

@@ -73,15 +73,6 @@ describe('api/AudioContext', () => {
   });
 
   describe('methods', () => {
-    it('.suspend()', () => {
-      const target = new AudioContext();
-
-      target._impl.suspend = jest.fn();
-
-      target.suspend();
-      expect(target._impl.suspend).toHaveBeenCalledTimes(1);
-    });
-
     it('.resume()', () => {
       const target = new AudioContext();
 

src/api/AudioScheduledSourceNode.js

@@ -12,8 +12,14 @@ class AudioScheduledSourceNode extends AudioNode {
     this._impl.$onended = callback;
   }
 
-  start(when) {
-    this._impl.start(when);
+  /**
+   *
+   * @param {number} when
+   * @param {number} [offset]
+   * @param {number} [duration]
+   */
+  start(when, offset, duration) {
+    this._impl.start(when, offset, duration);
   }
 
   stop(when) {

src/api/BaseAudioContext.js

@@ -60,10 +60,6 @@ class BaseAudioContext extends EventTarget {
     return this._impl.getState();
   }
 
-  suspend() {
-    return this._impl.suspend();
-  }
-
   resume() {
     return this._impl.resume();
   }

src/context/RawDataAudioContext.ts

@@ -35,6 +35,10 @@ export class RawDataAudioContext extends BaseAudioContext {
     this.numberOfChannels = numberOfChannels;
   }
 
+  suspend() {
+    return this._impl.suspend();
+  }
+
   createAudioBuffer(
     length: number,
     sampleRate: number,

src/context/StreamAudioContext.js

@@ -110,7 +110,7 @@ class StreamAudioContext extends BaseAudioContext {
     if (this.state === RUNNING) {
       this._suspend();
     }
-    return super.suspend();
+    return this._impl.suspend();
   }
 
   /**

src/context/WebAudioContext.js

@@ -78,7 +78,7 @@ class WebAudioContext extends BaseAudioContext {
     if (this._processor) {
       this._processor.disconnect();
     }
-    return super.suspend();
+    return this._impl.suspend();
   }
 
   /**

src/impl/AudioBufferSourceNode.js

@@ -153,8 +153,8 @@ class AudioBufferSourceNode extends AudioScheduledSourceNode {
 
   /**
    * @param {number} when
-   * @param {number} offset
-   * @param {number} duration
+   * @param {number} [offset]
+   * @param {number} [duration]
    */
   start(when, offset, duration) {
     /* istanbul ignore next */

src/impl/AudioNode.js

@@ -308,9 +308,11 @@ class AudioNode extends EventTarget {
   }
 
   /**
-   *
+   * @param {number} numberOfChannels
    */
-  channelDidUpdate() {}
+  channelDidUpdate(numberOfChannels) {
+    // do nothing
+  }
 
   /**
    *

src/impl/AudioScheduledSourceNode.js

@@ -59,8 +59,10 @@ class AudioScheduledSourceNode extends AudioSourceNode {
 
   /**
    * @param {number} when
+   * @param {number} [offset]
+   * @param {number} [duration]
    */
-  start(when) {
+  start(when, offset, duration) {
     /* istanbul ignore next */
     if (this._startTime !== Infinity) {
       return;