content/common/gpu/media/gpu_video_decode_accelerator.h

   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_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
   6 #define CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_
   7
   8 #include <vector>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/shared_memory.h"
  13 #include "content/common/gpu/gpu_command_buffer_stub.h"
  14 #include "content/common/gpu/media/video_decode_accelerator_impl.h"
  15 #include "ipc/ipc_listener.h"
  16 #include "ipc/ipc_sender.h"
  17 #include "media/video/video_decode_accelerator.h"
  18
  19 namespace base {
  20 class MessageLoopProxy;
  21 }
  22
  23 namespace content {
  24
  25 class GpuVideoDecodeAccelerator
  26     : public IPC::Listener,
  27       public IPC::Sender,
  28       public media::VideoDecodeAccelerator::Client,
  29       public GpuCommandBufferStub::DestructionObserver {
  30  public:
  31   // Each of the arguments to the constructor must outlive this object.
  32   // |stub->decoder()| will be made current around any operation that touches
  33   // the underlying VDA so that it can make GL calls safely.
  34   GpuVideoDecodeAccelerator(
  35       int32 host_route_id,
  36       GpuCommandBufferStub* stub,
  37       const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
  38   virtual ~GpuVideoDecodeAccelerator();
  39
  40   // IPC::Listener implementation.
  41   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  42
  43   // media::VideoDecodeAccelerator::Client implementation.
  44   virtual void ProvidePictureBuffers(uint32 requested_num_of_buffers,
  45                                      const gfx::Size& dimensions,
  46                                      uint32 texture_target) OVERRIDE;
  47   virtual void DismissPictureBuffer(int32 picture_buffer_id) OVERRIDE;
  48   virtual void PictureReady(const media::Picture& picture) OVERRIDE;
  49   virtual void NotifyInitializeDone() OVERRIDE;
  50   virtual void NotifyError(media::VideoDecodeAccelerator::Error error) OVERRIDE;
  51   virtual void NotifyEndOfBitstreamBuffer(int32 bitstream_buffer_id) OVERRIDE;
  52   virtual void NotifyFlushDone() OVERRIDE;
  53   virtual void NotifyResetDone() OVERRIDE;
  54
  55   // GpuCommandBufferStub::DestructionObserver implementation.
  56   virtual void OnWillDestroyStub() OVERRIDE;
  57
  58   // Function to delegate sending to actual sender.
  59   virtual bool Send(IPC::Message* message) OVERRIDE;
  60
  61   // Initialize the accelerator with the given profile and send the
  62   // |init_done_msg| when done.
  63   // The renderer process handle is valid as long as we have a channel between
  64   // GPU process and the renderer.
  65   void Initialize(const media::VideoCodecProfile profile,
  66                   IPC::Message* init_done_msg);
  67
  68  private:
  69   class MessageFilter;
  70
  71   // Handlers for IPC messages.
  72   void OnDecode(base::SharedMemoryHandle handle, int32 id, uint32 size);
  73   void OnAssignPictureBuffers(
  74       const std::vector<int32>& buffer_ids,
  75       const std::vector<uint32>& texture_ids,
  76       const std::vector<gfx::Size>& sizes);
  77   void OnReusePictureBuffer(
  78       int32 picture_buffer_id);
  79   void OnFlush();
  80   void OnReset();
  81   void OnDestroy();
  82
  83   // Called on IO thread when |filter_| has been removed.
  84   void OnFilterRemoved();
  85
  86   // Message to Send() when initialization is done.  Is only non-NULL during
  87   // initialization and is owned by the IPC channel underlying the
  88   // GpuCommandBufferStub.
  89   IPC::Message* init_done_msg_;
  90
  91   // Route ID to communicate with the host.
  92   int32 host_route_id_;
  93
  94   // Unowned pointer to the underlying GpuCommandBufferStub.
  95   GpuCommandBufferStub* stub_;
  96
  97   // The underlying VideoDecodeAccelerator.
  98   scoped_ptr<VideoDecodeAcceleratorImpl> video_decode_accelerator_;
  99
 100   // Callback for making the relevant context current for GL calls.
 101   // Returns false if failed.
 102   base::Callback<bool(void)> make_context_current_;
 103
 104   // The texture target as requested by ProvidePictureBuffers().
 105   uint32 texture_target_;
 106
 107   // The message filter to run VDA::Decode on IO thread if VDA supports it.
 108   scoped_refptr<MessageFilter> filter_;
 109
 110   // GPU child message loop.
 111   scoped_refptr<base::MessageLoopProxy> child_message_loop_;
 112
 113   // GPU IO message loop.
 114   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
 115
 116   // Weak pointers will be invalidated on IO thread.
 117   base::WeakPtrFactory<Client> weak_factory_for_io_;
 118
 119   DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAccelerator);
 120 };
 121
 122 }  // namespace content
 123
 124 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_