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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CONTENT_RENDERER_GPU_STREAM_TEXTURE_HOST_ANDROID_H_
      6 #define CONTENT_RENDERER_GPU_STREAM_TEXTURE_HOST_ANDROID_H_
      7 
      8 #include "base/memory/weak_ptr.h"
      9 #include "content/common/android/surface_texture_peer.h"
     10 #include "ipc/ipc_listener.h"
     11 #include "ipc/ipc_message.h"
     12 
     13 namespace gfx {
     14 class Size;
     15 }
     16 
     17 struct GpuStreamTextureMsg_MatrixChanged_Params;
     18 
     19 namespace content {
     20 class GpuChannelHost;
     21 
     22 // Class for handling all the IPC messages between the GPU process and
     23 // StreamTextureProxy.
     24 class StreamTextureHost : public IPC::Listener {
     25  public:
     26   explicit StreamTextureHost(GpuChannelHost* channel);
     27   virtual ~StreamTextureHost();
     28 
     29   bool Initialize(int32 stream_id);
     30 
     31   // Listener class that is listening to the stream texture updates. It is
     32   // implemented by StreamTextureProxyImpl.
     33   class Listener {
     34    public:
     35     virtual void OnFrameAvailable() = 0;
     36     virtual void OnMatrixChanged(const float mtx[16]) = 0;
     37     virtual ~Listener() {}
     38   };
     39 
     40   void SetListener(Listener* listener) { listener_ = listener; }
     41 
     42   // Request the GPU process to create the surface texture and forward it
     43   // to the renderer process.
     44   void EstablishPeer(int32 primary_id, int32 secondary_id);
     45 
     46   // IPC::Channel::Listener implementation:
     47   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     48   virtual void OnChannelError() OVERRIDE;
     49 
     50  private:
     51   // Message handlers:
     52   void OnFrameAvailable();
     53   void OnMatrixChanged(const GpuStreamTextureMsg_MatrixChanged_Params& param);
     54 
     55   int route_id_;
     56   int stream_id_;
     57   Listener* listener_;
     58   scoped_refptr<GpuChannelHost> channel_;
     59   base::WeakPtrFactory<StreamTextureHost> weak_ptr_factory_;
     60 
     61   DISALLOW_IMPLICIT_CONSTRUCTORS(StreamTextureHost);
     62 };
     63 
     64 }  // namespace content
     65 
     66 #endif  // CONTENT_RENDERER_GPU_STREAM_TEXTURE_HOST_ANDROID_H_
     67