1 files changed, 131 insertions, 0 deletions
diff --git a/dom/media/webaudio/ScriptProcessorNode.h b/dom/media/webaudio/ScriptProcessorNode.h
new file mode 100644
index 0000000000..c8f023cb17
--- /dev/null
+++ b/dom/media/webaudio/ScriptProcessorNode.h
@@ -0,0 +1,131 @@
+/* -*- 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 ScriptProcessorNode_h_
+#define ScriptProcessorNode_h_
+
+#include "AudioNode.h"
+#include "mozilla/ErrorResult.h"
+
+namespace mozilla::dom {
+
+class AudioContext;
+class SharedBuffers;
+
+class ScriptProcessorNode final : public AudioNode {
+ public:
+  ScriptProcessorNode(AudioContext* aContext, uint32_t aBufferSize,
+                      uint32_t aNumberOfInputChannels,
+                      uint32_t aNumberOfOutputChannels);
+
+  NS_INLINE_DECL_REFCOUNTING_INHERITED(ScriptProcessorNode, AudioNode)
+
+  IMPL_EVENT_HANDLER(audioprocess)
+
+  using EventTarget::EventListenerAdded;
+  void EventListenerAdded(nsAtom* aType) override;
+
+  using EventTarget::EventListenerRemoved;
+  void EventListenerRemoved(nsAtom* aType) override;
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  AudioNode* Connect(AudioNode& aDestination, uint32_t aOutput, uint32_t aInput,
+                     ErrorResult& aRv) override {
+    AudioNode* node = AudioNode::Connect(aDestination, aOutput, aInput, aRv);
+    if (!aRv.Failed()) {
+      UpdateConnectedStatus();
+    }
+    return node;
+  }
+
+  void Connect(AudioParam& aDestination, uint32_t aOutput,
+               ErrorResult& aRv) override {
+    AudioNode::Connect(aDestination, aOutput, aRv);
+    if (!aRv.Failed()) {
+      UpdateConnectedStatus();
+    }
+  }
+  void Disconnect(ErrorResult& aRv) override {
+    AudioNode::Disconnect(aRv);
+    UpdateConnectedStatus();
+  }
+  void Disconnect(uint32_t aOutput, ErrorResult& aRv) override {
+    AudioNode::Disconnect(aOutput, aRv);
+    UpdateConnectedStatus();
+  }
+  void NotifyInputsChanged() override { UpdateConnectedStatus(); }
+  void NotifyHasPhantomInput() override {
+    mHasPhantomInput = true;
+    // No need to UpdateConnectedStatus() because there was previously an
+    // input in InputNodes().
+  }
+  void Disconnect(AudioNode& aDestination, ErrorResult& aRv) override {
+    AudioNode::Disconnect(aDestination, aRv);
+    UpdateConnectedStatus();
+  }
+  void Disconnect(AudioNode& aDestination, uint32_t aOutput,
+                  ErrorResult& aRv) override {
+    AudioNode::Disconnect(aDestination, aOutput, aRv);
+    UpdateConnectedStatus();
+  }
+  void Disconnect(AudioNode& aDestination, uint32_t aOutput, uint32_t aInput,
+                  ErrorResult& aRv) override {
+    AudioNode::Disconnect(aDestination, aOutput, aInput, aRv);
+    UpdateConnectedStatus();
+  }
+  void Disconnect(AudioParam& aDestination, ErrorResult& aRv) override {
+    AudioNode::Disconnect(aDestination, aRv);
+    UpdateConnectedStatus();
+  }
+  void Disconnect(AudioParam& aDestination, uint32_t aOutput,
+                  ErrorResult& aRv) override {
+    AudioNode::Disconnect(aDestination, aOutput, aRv);
+    UpdateConnectedStatus();
+  }
+  void SetChannelCount(uint32_t aChannelCount, ErrorResult& aRv) override {
+    if (aChannelCount != ChannelCount()) {
+      // Spec says to throw InvalidStateError, but see
+      // https://github.com/WebAudio/web-audio-api/issues/2153
+      aRv.ThrowNotSupportedError(
+          "Cannot change channel count of ScriptProcessorNode");
+    }
+  }
+  void SetChannelCountModeValue(ChannelCountMode aMode,
+                                ErrorResult& aRv) override {
+    if (aMode != ChannelCountMode::Explicit) {
+      // Spec says to throw InvalidStateError, but see
+      // https://github.com/WebAudio/web-audio-api/issues/2154
+      aRv.ThrowNotSupportedError(
+          "Cannot change channel count mode of ScriptProcessorNode");
+    }
+  }
+
+  uint32_t BufferSize() const { return mBufferSize; }
+
+  uint32_t NumberOfOutputChannels() const { return mNumberOfOutputChannels; }
+
+  using DOMEventTargetHelper::DispatchTrustedEvent;
+
+  const char* NodeType() const override { return "ScriptProcessorNode"; }
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
+
+ private:
+  virtual ~ScriptProcessorNode();
+
+  void UpdateConnectedStatus();
+
+  const uint32_t mBufferSize;
+  const uint32_t mNumberOfOutputChannels;
+  bool mHasPhantomInput = false;
+};
+
+}  // namespace mozilla::dom
+
+#endif