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 GLHelper;
  26 class GpuChannelHost;
  27 class WebGraphicsContext3DCommandBufferImpl;
  28
  29 // Glue code to expose functionality needed by media::GpuVideoAccelerator to
  30 // RenderViewImpl.  This class is entirely an implementation detail of
  31 // RenderViewImpl and only has its own header to allow extraction of its
  32 // implementation from render_view_impl.cc which is already far too large.
  33 //
  34 // The RendererGpuVideoAcceleratorFactories can be constructed on any thread,
  35 // but subsequent calls to all public methods of the class must be called from
  36 // the |task_runner_|, as provided during construction.
  37 class CONTENT_EXPORT RendererGpuVideoAcceleratorFactories
  38     : public media::GpuVideoAcceleratorFactories {
  39  public:
  40   // Takes a ref on |gpu_channel_host| and tests |context| for loss before each
  41   // use.  Safe to call from any thread.
  42   static scoped_refptr<RendererGpuVideoAcceleratorFactories> Create(
  43       GpuChannelHost* gpu_channel_host,
  44       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
  45       const scoped_refptr<ContextProviderCommandBuffer>& context_provider);
  46
  47   // media::GpuVideoAcceleratorFactories implementation.
  48   scoped_ptr<media::VideoDecodeAccelerator> CreateVideoDecodeAccelerator()
  49       override;
  50   scoped_ptr<media::VideoEncodeAccelerator> CreateVideoEncodeAccelerator()
  51       override;
  52   // Creates textures and produces them into mailboxes. Returns true on success
  53   // or false on failure.
  54   bool CreateTextures(int32 count,
  55                       const gfx::Size& size,
  56                       std::vector<uint32>* texture_ids,
  57                       std::vector<gpu::Mailbox>* texture_mailboxes,
  58                       uint32 texture_target) override;
  59   void DeleteTexture(uint32 texture_id) override;
  60   void WaitSyncPoint(uint32 sync_point) override;
  61   void ReadPixels(uint32 texture_id,
  62                   const gfx::Rect& visible_rect,
  63                   const SkBitmap& pixels) override;
  64   base::SharedMemory* CreateSharedMemory(size_t size) override;
  65   scoped_refptr<base::SingleThreadTaskRunner> GetTaskRunner() override;
  66   std::vector<media::VideoEncodeAccelerator::SupportedProfile>
  67   GetVideoEncodeAcceleratorSupportedProfiles() override;
  68
  69  private:
  70   friend class base::RefCountedThreadSafe<RendererGpuVideoAcceleratorFactories>;
  71   RendererGpuVideoAcceleratorFactories(
  72       GpuChannelHost* gpu_channel_host,
  73       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
  74       const scoped_refptr<ContextProviderCommandBuffer>& context_provider);
  75   ~RendererGpuVideoAcceleratorFactories() override;
  76
  77   // Helper to bind |context_provider| to the |task_runner_| thread after
  78   // construction.
  79   void BindContext();
  80
  81   // Helper to get a pointer to the WebGraphicsContext3DCommandBufferImpl,
  82   // if it has not been lost yet.
  83   WebGraphicsContext3DCommandBufferImpl* GetContext3d();
  84   GLHelper* GetGLHelper();
  85
  86   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  87   scoped_refptr<GpuChannelHost> gpu_channel_host_;
  88   scoped_refptr<ContextProviderCommandBuffer> context_provider_;
  89   scoped_ptr<GLHelper> gl_helper_;
  90
  91   // For sending requests to allocate shared memory in the Browser process.
  92   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(RendererGpuVideoAcceleratorFactories);
  95 };
  96
  97 }  // namespace content
  98
  99 #endif  // CONTENT_RENDERER_MEDIA_RENDERER_GPU_VIDEO_ACCELERATOR_FACTORIES_H_