import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

dom/media/webaudio/AudioBufferSourceNode.h

@@ -0,0 +1,149 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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/. */
+
+#ifndef AudioBufferSourceNode_h_
+#define AudioBufferSourceNode_h_
+
+#include "AudioNode.h"
+#include "AudioBuffer.h"
+
+namespace mozilla {
+namespace dom {
+
+class AudioParam;
+
+class AudioBufferSourceNode final : public AudioNode,
+                                    public MainThreadMediaStreamListener
+{
+public:
+  explicit AudioBufferSourceNode(AudioContext* aContext);
+
+  void DestroyMediaStream() override;
+
+  uint16_t NumberOfInputs() const final override
+  {
+    return 0;
+  }
+  AudioBufferSourceNode* AsAudioBufferSourceNode() override
+  {
+    return this;
+  }
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioBufferSourceNode, AudioNode)
+
+  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  void Start(double aWhen, double aOffset,
+             const Optional<double>& aDuration, ErrorResult& aRv);
+  void Stop(double aWhen, ErrorResult& aRv);
+
+  AudioBuffer* GetBuffer(JSContext* aCx) const
+  {
+    return mBuffer;
+  }
+  void SetBuffer(JSContext* aCx, AudioBuffer* aBuffer)
+  {
+    mBuffer = aBuffer;
+    SendBufferParameterToStream(aCx);
+    SendLoopParametersToStream();
+  }
+  AudioParam* PlaybackRate() const
+  {
+    return mPlaybackRate;
+  }
+  AudioParam* Detune() const
+  {
+    return mDetune;
+  }
+  bool Loop() const
+  {
+    return mLoop;
+  }
+  void SetLoop(bool aLoop)
+  {
+    mLoop = aLoop;
+    SendLoopParametersToStream();
+  }
+  double LoopStart() const
+  {
+    return mLoopStart;
+  }
+  void SetLoopStart(double aStart)
+  {
+    mLoopStart = aStart;
+    SendLoopParametersToStream();
+  }
+  double LoopEnd() const
+  {
+    return mLoopEnd;
+  }
+  void SetLoopEnd(double aEnd)
+  {
+    mLoopEnd = aEnd;
+    SendLoopParametersToStream();
+  }
+  void SendDopplerShiftToStream(double aDopplerShift);
+
+  IMPL_EVENT_HANDLER(ended)
+
+  void NotifyMainThreadStreamFinished() override;
+
+  const char* NodeType() const override
+  {
+    return "AudioBufferSourceNode";
+  }
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
+
+protected:
+  virtual ~AudioBufferSourceNode();
+
+private:
+  friend class AudioBufferSourceNodeEngine;
+  // START is sent during Start().
+  // STOP is sent during Stop().
+  // BUFFERSTART and BUFFEREND are sent when SetBuffer() and Start() have
+  // been called (along with sending the buffer).
+  enum EngineParameters {
+    SAMPLE_RATE,
+    START,
+    STOP,
+    // BUFFERSTART is the "offset" passed to start(), multiplied by
+    // buffer.sampleRate.
+    BUFFERSTART,
+    // BUFFEREND is the sum of "offset" and "duration" passed to start(),
+    // multiplied by buffer.sampleRate, or the size of the buffer, if smaller.
+    BUFFEREND,
+    LOOP,
+    LOOPSTART,
+    LOOPEND,
+    PLAYBACKRATE,
+    DETUNE,
+    DOPPLERSHIFT
+  };
+
+  void SendLoopParametersToStream();
+  void SendBufferParameterToStream(JSContext* aCx);
+  void SendOffsetAndDurationParametersToStream(AudioNodeStream* aStream);
+
+private:
+  double mLoopStart;
+  double mLoopEnd;
+  double mOffset;
+  double mDuration;
+  RefPtr<AudioBuffer> mBuffer;
+  RefPtr<AudioParam> mPlaybackRate;
+  RefPtr<AudioParam> mDetune;
+  bool mLoop;
+  bool mStartCalled;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif
+