src/content/common/gpu/media/gpu_video_encode_accelerator.h

   1 // Copyright 2013 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_ENCODE_ACCELERATOR_H_
   6 #define CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "content/common/gpu/gpu_command_buffer_stub.h"
  13 #include "ipc/ipc_listener.h"
  14 #include "media/video/video_encode_accelerator.h"
  15 #include "ui/gfx/size.h"
  16
  17 namespace base {
  18
  19 class SharedMemory;
  20
  21 }  // namespace base
  22
  23 namespace content {
  24
  25 // This class encapsulates the GPU process view of a VideoEncodeAccelerator,
  26 // wrapping the platform-specific VideoEncodeAccelerator instance.  It handles
  27 // IPC coming in from the renderer and passes it to the underlying VEA.
  28 class GpuVideoEncodeAccelerator
  29     : public IPC::Listener,
  30       public media::VideoEncodeAccelerator::Client,
  31       public GpuCommandBufferStub::DestructionObserver {
  32  public:
  33   GpuVideoEncodeAccelerator(int32 host_route_id, GpuCommandBufferStub* stub);
  34   virtual ~GpuVideoEncodeAccelerator();
  35
  36   // Initialize this accelerator with the given parameters and send
  37   // |init_done_msg| when complete.
  38   void Initialize(media::VideoFrame::Format input_format,
  39                   const gfx::Size& input_visible_size,
  40                   media::VideoCodecProfile output_profile,
  41                   uint32 initial_bitrate,
  42                   IPC::Message* init_done_msg);
  43
  44   // IPC::Listener implementation
  45   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
  46
  47   // media::VideoEncodeAccelerator::Client implementation.
  48   virtual void RequireBitstreamBuffers(unsigned int input_count,
  49                                        const gfx::Size& input_coded_size,
  50                                        size_t output_buffer_size) OVERRIDE;
  51   virtual void BitstreamBufferReady(int32 bitstream_buffer_id,
  52                                     size_t payload_size,
  53                                     bool key_frame) OVERRIDE;
  54   virtual void NotifyError(media::VideoEncodeAccelerator::Error error) OVERRIDE;
  55
  56   // GpuCommandBufferStub::DestructionObserver implementation.
  57   virtual void OnWillDestroyStub() OVERRIDE;
  58
  59   // Static query for supported profiles.  This query calls the appropriate
  60   // platform-specific version.
  61   static std::vector<media::VideoEncodeAccelerator::SupportedProfile>
  62       GetSupportedProfiles();
  63
  64  private:
  65   // Create the appropriate platform-specific VEA.
  66   static scoped_ptr<media::VideoEncodeAccelerator> CreateEncoder();
  67
  68   // IPC handlers, proxying media::VideoEncodeAccelerator for the renderer
  69   // process.
  70   void OnEncode(int32 frame_id,
  71                 base::SharedMemoryHandle buffer_handle,
  72                 uint32 buffer_size,
  73                 bool force_keyframe);
  74   void OnUseOutputBitstreamBuffer(int32 buffer_id,
  75                                   base::SharedMemoryHandle buffer_handle,
  76                                   uint32 buffer_size);
  77   void OnRequestEncodingParametersChange(uint32 bitrate, uint32 framerate);
  78
  79   void OnDestroy();
  80
  81   void EncodeFrameFinished(int32 frame_id, scoped_ptr<base::SharedMemory> shm);
  82
  83   void Send(IPC::Message* message);
  84   // Helper for replying to the creation request.
  85   void SendCreateEncoderReply(IPC::Message* message, bool succeeded);
  86
  87   // Route ID to communicate with the host.
  88   int32 host_route_id_;
  89
  90   // Unowned pointer to the underlying GpuCommandBufferStub.  |this| is
  91   // registered as a DestuctionObserver of |stub_| and will self-delete when
  92   // |stub_| is destroyed.
  93   GpuCommandBufferStub* stub_;
  94
  95   // Owned pointer to the underlying VideoEncodeAccelerator.
  96   scoped_ptr<media::VideoEncodeAccelerator> encoder_;
  97   base::Callback<bool(void)> make_context_current_;
  98
  99   // Video encoding parameters.
 100   media::VideoFrame::Format input_format_;
 101   gfx::Size input_visible_size_;
 102   gfx::Size input_coded_size_;
 103   size_t output_buffer_size_;
 104
 105   // Weak pointer for media::VideoFrames that refer back to |this|.
 106   base::WeakPtrFactory<GpuVideoEncodeAccelerator> weak_this_factory_;
 107
 108   DISALLOW_COPY_AND_ASSIGN(GpuVideoEncodeAccelerator);
 109 };
 110
 111 }  // namespace content
 112
 113 #endif  // CONTENT_COMMON_GPU_MEDIA_GPU_VIDEO_ENCODE_ACCELERATOR_H_