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/geometry/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   bool OnMessageReceived(const IPC::Message& message) override;
  44
  45   // media::VideoDecodeAccelerator::Client implementation.
  46   void ProvidePictureBuffers(uint32 requested_num_of_buffers,
  47                              const gfx::Size& dimensions,
  48                              uint32 texture_target) override;
  49   void DismissPictureBuffer(int32 picture_buffer_id) override;
  50   void PictureReady(const media::Picture& picture) override;
  51   void NotifyError(media::VideoDecodeAccelerator::Error error) override;
  52   void NotifyEndOfBitstreamBuffer(int32 bitstream_buffer_id) override;
  53   void NotifyFlushDone() override;
  54   void NotifyResetDone() override;
  55
  56   // GpuCommandBufferStub::DestructionObserver implementation.
  57   void OnWillDestroyStub() override;
  58
  59   // Function to delegate sending to actual sender.
  60   bool Send(IPC::Message* message) override;
  61
  62   // Initialize VDAs from the set of VDAs supported for current platform until
  63   // one of them succeeds for given |profile|. Send the |init_done_msg| when
  64   // done. filter_ is passed to GpuCommandBufferStub channel only if the chosen
  65   // VDA can decode on IO thread.
  66   void Initialize(const media::VideoCodecProfile profile,
  67                   IPC::Message* init_done_msg);
  68
  69  private:
  70   typedef scoped_ptr<media::VideoDecodeAccelerator>(
  71       GpuVideoDecodeAccelerator::*CreateVDAFp)();
  72
  73   class MessageFilter;
  74
  75   // Return a set of VDA Create function pointers applicable to the current
  76   // platform.
  77   std::vector<CreateVDAFp> CreateVDAFps();
  78   scoped_ptr<media::VideoDecodeAccelerator> CreateDXVAVDA();
  79   scoped_ptr<media::VideoDecodeAccelerator> CreateV4L2VDA();
  80   scoped_ptr<media::VideoDecodeAccelerator> CreateV4L2SliceVDA();
  81   scoped_ptr<media::VideoDecodeAccelerator> CreateVaapiVDA();
  82   scoped_ptr<media::VideoDecodeAccelerator> CreateVTVDA();
  83   scoped_ptr<media::VideoDecodeAccelerator> CreateOzoneVDA();
  84   scoped_ptr<media::VideoDecodeAccelerator> CreateAndroidVDA();
  85
  86   // We only allow self-delete, from OnWillDestroyStub(), after cleanup there.
  87   ~GpuVideoDecodeAccelerator() override;
  88
  89   // Handlers for IPC messages.
  90   void OnDecode(base::SharedMemoryHandle handle, int32 id, uint32 size);
  91   void OnAssignPictureBuffers(const std::vector<int32>& buffer_ids,
  92                               const std::vector<uint32>& texture_ids);
  93   void OnReusePictureBuffer(int32 picture_buffer_id);
  94   void OnFlush();
  95   void OnReset();
  96   void OnDestroy();
  97
  98   // Called on IO thread when |filter_| has been removed.
  99   void OnFilterRemoved();
 100
 101   // Sets the texture to cleared.
 102   void SetTextureCleared(const media::Picture& picture);
 103
 104   // Helper for replying to the creation request.
 105   void SendCreateDecoderReply(IPC::Message* message, bool succeeded);
 106
 107   // Helper to bind |image| to the texture specified by |client_texture_id|.
 108   void BindImage(uint32 client_texture_id,
 109                  uint32 texture_target,
 110                  scoped_refptr<gfx::GLImage> image);
 111
 112   // Route ID to communicate with the host.
 113   int32 host_route_id_;
 114
 115   // Unowned pointer to the underlying GpuCommandBufferStub.  |this| is
 116   // registered as a DestuctionObserver of |stub_| and will self-delete when
 117   // |stub_| is destroyed.
 118   GpuCommandBufferStub* stub_;
 119
 120   // The underlying VideoDecodeAccelerator.
 121   scoped_ptr<media::VideoDecodeAccelerator> video_decode_accelerator_;
 122
 123   // Callback for making the relevant context current for GL calls.
 124   // Returns false if failed.
 125   base::Callback<bool(void)> make_context_current_;
 126
 127   // The texture dimensions as requested by ProvidePictureBuffers().
 128   gfx::Size texture_dimensions_;
 129
 130   // The texture target as requested by ProvidePictureBuffers().
 131   uint32 texture_target_;
 132
 133   // The message filter to run VDA::Decode on IO thread if VDA supports it.
 134   scoped_refptr<MessageFilter> filter_;
 135
 136   // Used to wait on for |filter_| to be removed, before we can safely
 137   // destroy the VDA.
 138   base::WaitableEvent filter_removed_;
 139
 140   // GPU child message loop.
 141   scoped_refptr<base::MessageLoopProxy> child_message_loop_;
 142
 143   // GPU IO message loop.
 144   scoped_refptr<base::MessageLoopProxy> io_message_loop_;
 145
 146   // Weak pointers will be invalidated on IO thread.
 147   base::WeakPtrFactory<Client> weak_factory_for_io_;
 148
 149   // Protects |uncleared_textures_| when DCHECK is on. This is for debugging
 150   // only. We don't want to hold a lock on IO thread. When DCHECK is off,
 151   // |uncleared_textures_| is only accessed from the child thread.
 152   base::Lock debug_uncleared_textures_lock_;
 153
 154   // A map from picture buffer ID to TextureRef that have not been cleared.
 155   std::map<int32, scoped_refptr<gpu::gles2::TextureRef> > uncleared_textures_;
 156
 157   DISALLOW_IMPLICIT_CONSTRUCTORS(GpuVideoDecodeAccelerator);
 158 };
 159
 160 }  // namespace content
 161
 162 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_DECODE_ACCELERATOR_H_