content/renderer/media/renderer_gpu_video_accelerator_factories.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_RENDERER_MEDIA_RENDERER_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
   6 #define CONTENT_RENDERER_MEDIA_RENDERER_GPU_VIDEO_ACCELERATOR_FACTORIES_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/synchronization/waitable_event.h"
  14 #include "content/child/thread_safe_sender.h"
  15 #include "content/common/content_export.h"
  16 #include "media/filters/gpu_video_accelerator_factories.h"
  17 #include "ui/gfx/size.h"
  18
  19 namespace base {
  20 class WaitableEvent;
  21 }
  22
  23 namespace content {
  24 class ContextProviderCommandBuffer;
  25 class GpuChannelHost;
  26 class WebGraphicsContext3DCommandBufferImpl;
  27
  28 // Glue code to expose functionality needed by media::GpuVideoAccelerator to
  29 // RenderViewImpl.  This class is entirely an implementation detail of
  30 // RenderViewImpl and only has its own header to allow extraction of its
  31 // implementation from render_view_impl.cc which is already far too large.
  32 //
  33 // The RendererGpuVideoAcceleratorFactories can be constructed on any thread,
  34 // but subsequent calls to all public methods of the class must be called from
  35 // the |message_loop_proxy_|, as provided during construction.
  36 class CONTENT_EXPORT RendererGpuVideoAcceleratorFactories
  37     : public media::GpuVideoAcceleratorFactories {
  38  public:
  39   // Takes a ref on |gpu_channel_host| and tests |context| for loss before each
  40   // use.  Safe to call from any thread.
  41   static scoped_refptr<RendererGpuVideoAcceleratorFactories> Create(
  42       GpuChannelHost* gpu_channel_host,
  43       const scoped_refptr<base::MessageLoopProxy>& message_loop_proxy,
  44       const scoped_refptr<ContextProviderCommandBuffer>& context_provider);
  45
  46   // media::GpuVideoAcceleratorFactories implementation.
  47   virtual scoped_ptr<media::VideoDecodeAccelerator>
  48       CreateVideoDecodeAccelerator() OVERRIDE;
  49   virtual scoped_ptr<media::VideoEncodeAccelerator>
  50       CreateVideoEncodeAccelerator() OVERRIDE;
  51   // Creates textures and produces them into mailboxes. Returns true on success
  52   // or false on failure.
  53   virtual bool CreateTextures(int32 count,
  54                               const gfx::Size& size,
  55                               std::vector<uint32>* texture_ids,
  56                               std::vector<gpu::Mailbox>* texture_mailboxes,
  57                               uint32 texture_target) OVERRIDE;
  58   virtual void DeleteTexture(uint32 texture_id) OVERRIDE;
  59   virtual void WaitSyncPoint(uint32 sync_point) OVERRIDE;
  60   virtual void ReadPixels(uint32 texture_id,
  61                           const gfx::Rect& visible_rect,
  62                           const SkBitmap& pixels) OVERRIDE;
  63   virtual base::SharedMemory* CreateSharedMemory(size_t size) OVERRIDE;
  64   virtual scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() OVERRIDE;
  65
  66  private:
  67   friend class base::RefCountedThreadSafe<RendererGpuVideoAcceleratorFactories>;
  68   RendererGpuVideoAcceleratorFactories(
  69       GpuChannelHost* gpu_channel_host,
  70       const scoped_refptr<base::MessageLoopProxy>& message_loop_proxy,
  71       const scoped_refptr<ContextProviderCommandBuffer>& context_provider);
  72   virtual ~RendererGpuVideoAcceleratorFactories();
  73
  74   // Helper to bind |context_provider| to the |task_runner_| thread after
  75   // construction.
  76   void BindContext();
  77
  78   // Helper to get a pointer to the WebGraphicsContext3DCommandBufferImpl,
  79   // if it has not been lost yet.
  80   WebGraphicsContext3DCommandBufferImpl* GetContext3d();
  81
  82   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  83   scoped_refptr<GpuChannelHost> gpu_channel_host_;
  84   scoped_refptr<ContextProviderCommandBuffer> context_provider_;
  85
  86   // For sending requests to allocate shared memory in the Browser process.
  87   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
  88
  89   DISALLOW_COPY_AND_ASSIGN(RendererGpuVideoAcceleratorFactories);
  90 };
  91
  92 }  // namespace content
  93
  94 #endif  // CONTENT_RENDERER_MEDIA_RENDERER_GPU_VIDEO_ACCELERATOR_FACTORIES_H_