1 files changed, 115 insertions, 0 deletions
diff --git a/dom/media/webaudio/AudioDestinationNode.h b/dom/media/webaudio/AudioDestinationNode.h
new file mode 100644
index 000000000..cf0db7862
--- /dev/null
+++ b/dom/media/webaudio/AudioDestinationNode.h
@@ -0,0 +1,115 @@
+/* -*- 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 AudioDestinationNode_h_
+#define AudioDestinationNode_h_
+
+#include "mozilla/dom/AudioChannelBinding.h"
+#include "AudioNode.h"
+#include "nsIAudioChannelAgent.h"
+
+namespace mozilla {
+namespace dom {
+
+class AudioContext;
+
+class AudioDestinationNode final : public AudioNode
+                                 , public nsIAudioChannelAgentCallback
+                                 , public MainThreadMediaStreamListener
+{
+public:
+  // This node type knows what MediaStreamGraph to use based on
+  // whether it's in offline mode.
+  AudioDestinationNode(AudioContext* aContext,
+                       bool aIsOffline,
+                       AudioChannel aChannel = AudioChannel::Normal,
+                       uint32_t aNumberOfChannels = 0,
+                       uint32_t aLength = 0,
+                       float aSampleRate = 0.0f);
+
+  void DestroyMediaStream() override;
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioDestinationNode, AudioNode)
+  NS_DECL_NSIAUDIOCHANNELAGENTCALLBACK
+
+  JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+
+  uint16_t NumberOfOutputs() const final override
+  {
+    return 0;
+  }
+
+  uint32_t MaxChannelCount() const;
+  void SetChannelCount(uint32_t aChannelCount,
+                       ErrorResult& aRv) override;
+
+  // Returns the stream or null after unlink.
+  AudioNodeStream* Stream() { return mStream; }
+
+  void Mute();
+  void Unmute();
+
+  void Suspend();
+  void Resume();
+
+  void StartRendering(Promise* aPromise);
+
+  void OfflineShutdown();
+
+  AudioChannel MozAudioChannelType() const;
+
+  void NotifyMainThreadStreamFinished() override;
+  void FireOfflineCompletionEvent();
+
+  nsresult CreateAudioChannelAgent();
+  void DestroyAudioChannelAgent();
+
+  const char* NodeType() const override
+  {
+    return "AudioDestinationNode";
+  }
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
+
+  void InputMuted(bool aInputMuted);
+  void ResolvePromise(AudioBuffer* aRenderedBuffer);
+
+  unsigned long Length()
+  {
+    MOZ_ASSERT(mIsOffline);
+    return mFramesToProduce;
+  }
+
+protected:
+  virtual ~AudioDestinationNode();
+
+private:
+  void SetMozAudioChannelType(AudioChannel aValue, ErrorResult& aRv);
+  bool CheckAudioChannelPermissions(AudioChannel aValue);
+
+  SelfReference<AudioDestinationNode> mOfflineRenderingRef;
+  uint32_t mFramesToProduce;
+
+  nsCOMPtr<nsIAudioChannelAgent> mAudioChannelAgent;
+  RefPtr<MediaInputPort> mCaptureStreamPort;
+
+  RefPtr<Promise> mOfflineRenderingPromise;
+
+  // Audio Channel Type.
+  AudioChannel mAudioChannel;
+  bool mIsOffline;
+  bool mAudioChannelSuspended;
+
+  bool mCaptured;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif
+