1 files changed, 67 insertions, 0 deletions
diff --git a/dom/media/webaudio/ChannelMergerNode.h b/dom/media/webaudio/ChannelMergerNode.h
new file mode 100644
index 0000000000..92327c8b1e
--- /dev/null
+++ b/dom/media/webaudio/ChannelMergerNode.h
@@ -0,0 +1,67 @@
+/* -*- 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 ChannelMergerNode_h_
+#define ChannelMergerNode_h_
+
+#include "AudioNode.h"
+
+namespace mozilla::dom {
+
+class AudioContext;
+struct ChannelMergerOptions;
+
+class ChannelMergerNode final : public AudioNode {
+ public:
+  static already_AddRefed<ChannelMergerNode> Create(
+      AudioContext& aAudioContext, const ChannelMergerOptions& aOptions,
+      ErrorResult& aRv);
+
+  NS_INLINE_DECL_REFCOUNTING_INHERITED(ChannelMergerNode, AudioNode)
+
+  static already_AddRefed<ChannelMergerNode> Constructor(
+      const GlobalObject& aGlobal, AudioContext& aAudioContext,
+      const ChannelMergerOptions& aOptions, ErrorResult& aRv) {
+    return Create(aAudioContext, aOptions, aRv);
+  }
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  uint16_t NumberOfInputs() const override { return mInputCount; }
+
+  const char* NodeType() const override { return "ChannelMergerNode"; }
+
+  virtual void SetChannelCount(uint32_t aChannelCount,
+                               ErrorResult& aRv) override {
+    if (aChannelCount != 1) {
+      aRv.ThrowInvalidStateError(
+          "Cannot change channel count of ChannelMergerNode");
+    }
+  }
+
+  virtual void SetChannelCountModeValue(ChannelCountMode aMode,
+                                        ErrorResult& aRv) override {
+    if (aMode != ChannelCountMode::Explicit) {
+      aRv.ThrowInvalidStateError(
+          "Cannot change channel count mode of ChannelMergerNode");
+    }
+  }
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override {
+    return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+  }
+
+ private:
+  ChannelMergerNode(AudioContext* aContext, uint16_t aInputCount);
+  ~ChannelMergerNode() = default;
+
+  const uint16_t mInputCount;
+};
+
+}  // namespace mozilla::dom
+
+#endif