media: Add MediaInterfaceProxy

content/browser/media/media_interface_proxy.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_MEDIA_MEDIA_INTERFACE_PROXY_H_
+#define CONTENT_BROWSER_MEDIA_MEDIA_INTERFACE_PROXY_H_
+
+#include <memory>
+#include <vector>
+
+#include "base/macros.h"
+#include "base/threading/thread_checker.h"
+#include "media/mojo/interfaces/interface_factory.mojom.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/service_manager/public/cpp/interface_registry.h"
+
+namespace content {
+
+class RenderFrameHost;
+
+// This implements the media::mojom::InterfaceFactory interface for
+// RenderFrameHostImpl. Upon media::mojom::InterfaceFactory calls, it will
+// figure out where to forward to the interface requests.
+class MediaInterfaceProxy : public media::mojom::InterfaceFactory {
+ public:
+  // Constructs MediaInterfaceProxy and bind |this| to the |request|. When
+  // connection error happens on the client interface, |error_handler| should be
+  // fired.
+  MediaInterfaceProxy(RenderFrameHost* render_frame_host,
+                      media::mojom::InterfaceFactoryRequest request,
+                      const base::Closure& error_handler);
+  ~MediaInterfaceProxy() final;
+
+  // media::mojom::InterfaceFactory implementation.
+  void CreateAudioDecoder(media::mojom::AudioDecoderRequest request) final;
+  void CreateVideoDecoder(media::mojom::VideoDecoderRequest request) final;
+  void CreateRenderer(const std::string& audio_device_id,
+                      media::mojom::RendererRequest request) final;
+  void CreateCdm(media::mojom::ContentDecryptionModuleRequest request) final;
+
+ private:
+  media::mojom::InterfaceFactory* GetMediaInterfaceFactory();
+
+  // Callback for connection error on |interface_factory_ptr_|.
+  void OnConnectionError();
+
+  void ConnectToService();
+
+  // Safe to hold a raw pointer since |this| is owned by RenderFrameHostImpl.
+  RenderFrameHost* render_frame_host_;
+
+  // TODO(xhwang): Replace InterfaceProvider with a dedicated host interface.
+  // See http://crbug.com/660573
+  std::vector<std::unique_ptr<service_manager::InterfaceRegistry>>
+      media_registries_;
+
+  mojo::Binding<media::mojom::InterfaceFactory> binding_;
+
+  // InterfacePtr to the remote media::mojom::InterfaceFactory implementation.
+  media::mojom::InterfaceFactoryPtr interface_factory_ptr_;
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaInterfaceProxy);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_MEDIA_INTERFACE_PROXY_H_