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 <map>
   9 #include <vector>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/shared_memory.h"
  14 #include "base/synchronization/waitable_event.h"
  15 #include "content/common/gpu/gpu_command_buffer_stub.h"
  16 #include "gpu/command_buffer/service/texture_manager.h"
  17 #include "ipc/ipc_listener.h"
  18 #include "ipc/ipc_sender.h"
  19 #include "media/video/video_decode_accelerator.h"
  20 #include "ui/gfx/size.h"
  21
  22 namespace base {
  23 class MessageLoopProxy;
  24 }
  25
  26 namespace content {
  27
  28 class GpuVideoDecodeAccelerator
  29     : public IPC::Listener,
  30       public IPC::Sender,
  31       public media::VideoDecodeAccelerator::Client,
  32       public GpuCommandBufferStub::DestructionObserver {
  33  public:
  34   // Each of the arguments to the constructor must outlive this object.
  35   // |stub->decoder()| will be made current around any operation that touches
  36   // the underlying VDA so that it can make GL calls safely.
  37   GpuVideoDecodeAccelerator(
  38       int32 host_route_id,
  39       GpuCommandBufferStub* stub,
  40       const scoped_refptr<base::MessageLoopProxy>& io_message_loop);
  41
  42   // IPC::Listener implementation.
  43   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  44
  45   // media::VideoDecodeAccelerator::Client implementation.
  46   virtual void ProvidePictureBuffers(uint32 requested_num_of_buffers,
  47                                      const gfx::Size& dimensions,
  48                                      uint32 texture_target) OVERRIDE;
  49   virtual void DismissPictureBuffer(int32 picture_buffer_id) OVERRIDE;
  50   virtual void PictureReady(const media::Picture& picture) OVERRIDE;
  51   virtual void NotifyError(media::VideoDecodeAccelerator::Error error) OVERRIDE;
  52   virtual void NotifyEndOfBitstreamBuffer(int32 bitstream_buffer_id) OVERRIDE;
  53   virtual void NotifyFlushDone() OVERRIDE;
  54   virtual void NotifyResetDone() OVERRIDE;
  55
  56   // GpuCommandBufferStub::DestructionObserver implementation.
  57   virtual void OnWillDestroyStub() OVERRIDE;
  58
  59   // Function to delegate sending to actual sender.
  60   virtual bool Send(IPC::Message* message) OVERRIDE;
  61
  62   // Initialize the accelerator with the given profile and send the
  63   // |init_done_msg| when done.
  64   void Initialize(const media::VideoCodecProfile profile,
  65                   IPC::Message* init_done_msg);
  66
  67  private:
  68   class MessageFilter;
  69
  70   // We only allow self-delete, from OnWillDestroyStub(), after cleanup there.
  71   virtual ~GpuVideoDecodeAccelerator();
  72
  73   // Handlers for IPC messages.
  74   void OnDecode(base::SharedMemoryHandle handle, int32 id, uint32 size);
  75   void OnAssignPictureBuffers(const std::vector<int32>& buffer_ids,
  76                               const std::vector<uint32>& texture_ids);
  77   void OnReusePictureBuffer(int32 picture_buffer_id);
  78   void OnFlush();
  79   void OnReset();
  80   void OnDestroy();
  81
  82   // Called on IO thread when |filter_| has been removed.
  83   void OnFilterRemoved();
  84
  85   // Sets the texture to cleared.
  86   void SetTextureCleared(const media::Picture& picture);
  87
  88   // Helper for replying to the creation request.
  89   void SendCreateDecoderReply(IPC::Message* message, bool succeeded);
  90
  91   // Route ID to communicate with the host.
  92   int32 host_route_id_;
  93
  94   // Unowned pointer to the underlying GpuCommandBufferStub.  |this| is
  95   // registered as a DestuctionObserver of |stub_| and will self-delete when
  96   // |stub_| is destroyed.
  97   GpuCommandBufferStub* stub_;
  98
  99   // The underlying VideoDecodeAccelerator.
 100   scoped_ptr<media::VideoDecodeAccelerator> video_decode_accelerator_;
 101
 102   // Callback for making the relevant context current for GL calls.
 103   // Returns false if failed.
 104   base::Callback<bool(void)> make_context_current_;
 105
 106   // The texture dimensions as requested by ProvidePictureBuffers().
 107   gfx::Size texture_dimensions_;
 108
 109   // The texture target as requested by ProvidePictureBuffers().
 110   uint32 texture_target_;
 111
 112   // The message filter to run VDA::Decode on IO thread if VDA supports it.
 113   scoped_refptr<MessageFilter> filter_;
 114
 115   // Used to wait on for |filter_| to be removed, before we can safely
 116   // destroy the VDA.
 117   base::WaitableEvent filter_removed_;
 118
 119   // GPU child message loop.
 120   scoped_refptr<base::MessageLoopProxy> child_message_loop_;
 121
 122   // GPU IO message loop.
 123   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
 124
 125   // Weak pointers will be invalidated on IO thread.
 126   base::WeakPtrFactory<Client> weak_factory_for_io_;
 127
 128   // Protects |uncleared_textures_| when DCHECK is on. This is for debugging
 129   // only. We don't want to hold a lock on IO thread. When DCHECK is off,
 130   // |uncleared_textures_| is only accessed from the child thread.
 131   base::Lock debug_uncleared_textures_lock_;
 132
 133   // A map from picture buffer ID to TextureRef that have not been cleared.
 134   std::map<int32, scoped_refptr<gpu::gles2::TextureRef> > uncleared_textures_;
 135
 136   DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAccelerator);
 137 };
 138
 139 }  // namespace content
 140
 141 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_