media: gpu process ipc video decoder implementation

chrome/gpu/gpu_video_service.h

+// Copyright (c) 2010 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 CHROME_GPU_GPU_VIDEO_SERVICE_H_
+#define CHROME_GPU_GPU_VIDEO_SERVICE_H_
+
+#include <map>
+
+#include "base/scoped_ptr.h"
+#include "base/ref_counted.h"
+#include "base/singleton.h"
+#include "chrome/gpu/gpu_video_decoder.h"
+#include "ipc/ipc_channel.h"
+
+class GpuChannel;
+
+class GpuVideoService : public IPC::Channel::Listener,
+                        public Singleton<GpuVideoService> {
+ public:
+  // IPC::Channel::Listener.
+  virtual void OnChannelConnected(int32 peer_pid);
+  virtual void OnChannelError();
+  virtual void OnMessageReceived(const IPC::Message& message);
+
+  bool CreateVideoDecoder(GpuChannel* channel,
+                          MessageRouter* router,
+                          GpuVideoDecoderInfoParam* param);
+  void DestroyVideoDecoder(MessageRouter* router,
+                           int32 decoder_id);
+
+ private:
+  struct GpuVideoDecoderInfo {
+    scoped_refptr<GpuVideoDecoder> decoder_;
+    GpuChannel* channel_;
+    GpuVideoDecoderInfoParam param;
+  };
+
+  GpuVideoService();
+  virtual ~GpuVideoService();
+
+  std::map<int32, GpuVideoDecoderInfo> decoder_map_;
+  int32 next_available_decoder_id_;
+
+  // Specialize video service on different platform will override.
+  virtual bool IntializeGpuVideoService();
+  virtual bool UnintializeGpuVideoService();
+
+  int32 GetNextAvailableDecoderID();
+
+  friend struct DefaultSingletonTraits<GpuVideoService>;
+  DISALLOW_COPY_AND_ASSIGN(GpuVideoService);
+};
+
+#endif  // CHROME_GPU_GPU_VIDEO_SERVICE_H_
+