1 files changed, 91 insertions, 0 deletions
diff --git a/dom/media/webaudio/DynamicsCompressorNode.h b/dom/media/webaudio/DynamicsCompressorNode.h
new file mode 100644
index 0000000000..1e0f9cda62
--- /dev/null
+++ b/dom/media/webaudio/DynamicsCompressorNode.h
@@ -0,0 +1,91 @@
+/* -*- 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 DynamicsCompressorNode_h_
+#define DynamicsCompressorNode_h_
+
+#include "AudioNode.h"
+#include "AudioParam.h"
+
+namespace mozilla::dom {
+
+class AudioContext;
+struct DynamicsCompressorOptions;
+
+class DynamicsCompressorNode final : public AudioNode {
+ public:
+  static already_AddRefed<DynamicsCompressorNode> Create(
+      AudioContext& aAudioContext, const DynamicsCompressorOptions& aOptions,
+      ErrorResult& aRv);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DynamicsCompressorNode, AudioNode)
+
+  static already_AddRefed<DynamicsCompressorNode> Constructor(
+      const GlobalObject& aGlobal, AudioContext& aAudioContext,
+      const DynamicsCompressorOptions& aOptions, ErrorResult& aRv) {
+    return Create(aAudioContext, aOptions, aRv);
+  }
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  AudioParam* Threshold() const { return mThreshold; }
+
+  AudioParam* Knee() const { return mKnee; }
+
+  AudioParam* Ratio() const { return mRatio; }
+
+  AudioParam* Attack() const { return mAttack; }
+
+  // Called GetRelease to prevent clashing with the nsISupports::Release name
+  AudioParam* GetRelease() const { return mRelease; }
+
+  float Reduction() const { return mReduction; }
+
+  const char* NodeType() const override { return "DynamicsCompressorNode"; }
+
+  size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
+
+  void SetReduction(float aReduction) {
+    MOZ_ASSERT(NS_IsMainThread());
+    mReduction = aReduction;
+  }
+
+  void SetChannelCountModeValue(ChannelCountMode aMode,
+                                ErrorResult& aRv) override {
+    if (aMode == ChannelCountMode::Max) {
+      aRv.ThrowNotSupportedError("Cannot set channel count mode to \"max\"");
+      return;
+    }
+    AudioNode::SetChannelCountModeValue(aMode, aRv);
+  }
+
+  void SetChannelCount(uint32_t aChannelCount, ErrorResult& aRv) override {
+    if (aChannelCount > 2) {
+      aRv.ThrowNotSupportedError(
+          nsPrintfCString("%u is greater than 2", aChannelCount));
+      return;
+    }
+    AudioNode::SetChannelCount(aChannelCount, aRv);
+  }
+
+ private:
+  explicit DynamicsCompressorNode(AudioContext* aContext);
+  ~DynamicsCompressorNode() = default;
+
+  RefPtr<AudioParam> mThreshold;
+  RefPtr<AudioParam> mKnee;
+  RefPtr<AudioParam> mRatio;
+  float mReduction;
+  RefPtr<AudioParam> mAttack;
+  RefPtr<AudioParam> mRelease;
+};
+
+}  // namespace mozilla::dom
+
+#endif