media: gpu process ipc video decoder implementation

chrome/gpu/gpu_video_decoder.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_DECODER_H_
+#define CHROME_GPU_GPU_VIDEO_DECODER_H_
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/ref_counted.h"
+#include "base/scoped_ptr.h"
+#include "chrome/common/gpu_video_common.h"
+#include "ipc/ipc_channel.h"
+
+class GpuChannel;
+
+class GpuVideoDecoder
+    : public IPC::Channel::Listener,
+      public base::RefCountedThreadSafe<GpuVideoDecoder> {
+
+ public:
+  // IPC::Channel::Listener.
+  virtual void OnChannelConnected(int32 peer_pid);
+  virtual void OnChannelError();
+  virtual void OnMessageReceived(const IPC::Message& message);
+
+  virtual bool DoInitialize(const GpuVideoDecoderInitParam& init_param,
+                            GpuVideoDecoderInitDoneParam* done_param) = 0;
+  virtual bool DoUninitialize() = 0;
+  virtual void DoFlush() = 0;
+  virtual void DoEmptyThisBuffer(
+      const GpuVideoDecoderInputBufferParam& buffer) = 0;
+  virtual void DoFillThisBuffer(
+      const GpuVideoDecoderOutputBufferParam& frame) = 0;
+  virtual void DoFillThisBufferDoneACK() = 0;
+
+  GpuVideoDecoder(const GpuVideoDecoderInfoParam* param,
+                  GpuChannel* channel_,
+                  base::ProcessHandle handle);
+  virtual ~GpuVideoDecoder() {}
+
+ protected:
+  // Output message helper.
+  void SendInitializeDone(const GpuVideoDecoderInitDoneParam& param);
+  void SendUninitializeDone();
+  void SendFlushDone();
+  void SendEmptyBufferDone();
+  void SendEmptyBufferACK();
+  void SendFillBufferDone(const GpuVideoDecoderOutputBufferParam& frame);
+
+  int32 route_id() { return decoder_host_route_id_; }
+
+  int32 decoder_host_route_id_;
+  GpuChannel* channel_;
+  base::ProcessHandle renderer_handle_;
+
+  GpuVideoDecoderInitParam init_param_;
+  GpuVideoDecoderInitDoneParam done_param_;
+
+  scoped_ptr<base::SharedMemory> input_transfer_buffer_;
+  scoped_ptr<base::SharedMemory> output_transfer_buffer_;
+
+ private:
+  // Input message handler.
+  void OnInitialize(const GpuVideoDecoderInitParam& param);
+  void OnUninitialize();
+  void OnFlush();
+  void OnEmptyThisBuffer(const GpuVideoDecoderInputBufferParam& buffer);
+  void OnFillThisBuffer(const GpuVideoDecoderOutputBufferParam& frame);
+  void OnFillThisBufferDoneACK();
+
+  DISALLOW_COPY_AND_ASSIGN(GpuVideoDecoder);
+};
+
+#endif  // CHROME_GPU_GPU_VIDEO_DECODER_H_
+