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diff --git a/dom/media/ipc/RemoteDecoderManagerParent.h b/dom/media/ipc/RemoteDecoderManagerParent.h
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+++ b/dom/media/ipc/RemoteDecoderManagerParent.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 include_dom_media_ipc_RemoteDecoderManagerParent_h
+#define include_dom_media_ipc_RemoteDecoderManagerParent_h
+
+#include "GPUVideoImage.h"
+#include "mozilla/PRemoteDecoderManagerParent.h"
+#include "mozilla/layers/VideoBridgeChild.h"
+
+namespace mozilla {
+
+class PDMFactory;
+class PMFMediaEngineParent;
+
+class RemoteDecoderManagerParent final
+    : public PRemoteDecoderManagerParent,
+      public layers::IGPUVideoSurfaceManager {
+  friend class PRemoteDecoderManagerParent;
+
+ public:
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(RemoteDecoderManagerParent, override)
+
+  static bool CreateForContent(
+      Endpoint<PRemoteDecoderManagerParent>&& aEndpoint);
+
+  static bool CreateVideoBridgeToOtherProcess(
+      Endpoint<layers::PVideoBridgeChild>&& aEndpoint);
+
+  // Must be called on manager thread.
+  // Store the image so that it can be used out of process. Will be released
+  // when DeallocateSurfaceDescriptor is called.
+  void StoreImage(const SurfaceDescriptorGPUVideo& aSD, layers::Image* aImage,
+                  layers::TextureClient* aTexture);
+
+  // IGPUVideoSurfaceManager methods
+  already_AddRefed<gfx::SourceSurface> Readback(
+      const SurfaceDescriptorGPUVideo& aSD) override {
+    MOZ_ASSERT_UNREACHABLE("Not usable from the parent");
+    return nullptr;
+  }
+  void DeallocateSurfaceDescriptor(
+      const SurfaceDescriptorGPUVideo& aSD) override;
+
+  static bool StartupThreads();
+  static void ShutdownThreads();
+
+  static void ShutdownVideoBridge();
+
+  bool OnManagerThread();
+
+  // Can be called from manager thread only
+  PDMFactory& EnsurePDMFactory();
+
+ protected:
+  PRemoteDecoderParent* AllocPRemoteDecoderParent(
+      const RemoteDecoderInfoIPDL& aRemoteDecoderInfo,
+      const CreateDecoderParams::OptionSet& aOptions,
+      const Maybe<layers::TextureFactoryIdentifier>& aIdentifier,
+      const Maybe<uint64_t>& aMediaEngineId,
+      const Maybe<TrackingId>& aTrackingId);
+  bool DeallocPRemoteDecoderParent(PRemoteDecoderParent* actor);
+
+  PMFMediaEngineParent* AllocPMFMediaEngineParent();
+  bool DeallocPMFMediaEngineParent(PMFMediaEngineParent* actor);
+
+  mozilla::ipc::IPCResult RecvReadback(const SurfaceDescriptorGPUVideo& aSD,
+                                       SurfaceDescriptor* aResult);
+  mozilla::ipc::IPCResult RecvDeallocateSurfaceDescriptorGPUVideo(
+      const SurfaceDescriptorGPUVideo& aSD);
+
+  void ActorDestroy(mozilla::ipc::IProtocol::ActorDestroyReason) override;
+  void ActorDealloc() override;
+
+ private:
+  explicit RemoteDecoderManagerParent(nsISerialEventTarget* aThread);
+  ~RemoteDecoderManagerParent();
+
+  void Open(Endpoint<PRemoteDecoderManagerParent>&& aEndpoint);
+
+  std::map<uint64_t, RefPtr<layers::Image>> mImageMap;
+  std::map<uint64_t, RefPtr<layers::TextureClient>> mTextureMap;
+
+  nsCOMPtr<nsISerialEventTarget> mThread;
+  RefPtr<PDMFactory> mPDMFactory;
+};
+
+}  // namespace mozilla
+
+#endif  // include_dom_media_ipc_RemoteDecoderManagerParent_h