src/cc/layers/video_frame_provider_client_impl.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 CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_
   6 #define CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/synchronization/lock.h"
  10 #include "cc/layers/video_frame_provider.h"
  11 #include "ui/gfx/transform.h"
  12
  13 namespace media { class VideoFrame; }
  14
  15 namespace cc {
  16 class VideoLayerImpl;
  17
  18 class VideoFrameProviderClientImpl
  19     : public VideoFrameProvider::Client,
  20       public base::RefCounted<VideoFrameProviderClientImpl> {
  21  public:
  22   static scoped_refptr<VideoFrameProviderClientImpl> Create(
  23       VideoFrameProvider* provider);
  24
  25   void set_active_video_layer(VideoLayerImpl* video_layer) {
  26     active_video_layer_ = video_layer;
  27   }
  28
  29   void Stop();
  30   bool Stopped() const { return !provider_; }
  31
  32   scoped_refptr<media::VideoFrame> AcquireLockAndCurrentFrame();
  33   void PutCurrentFrame(const scoped_refptr<media::VideoFrame>& frame);
  34   void ReleaseLock();
  35   const gfx::Transform& stream_texture_matrix() const {
  36     return stream_texture_matrix_;
  37   }
  38
  39   // VideoFrameProvider::Client implementation. These methods are all callable
  40   // on any thread.
  41   virtual void StopUsingProvider() OVERRIDE;
  42   virtual void DidReceiveFrame() OVERRIDE;
  43   virtual void DidUpdateMatrix(const float* matrix) OVERRIDE;
  44
  45  private:
  46   explicit VideoFrameProviderClientImpl(VideoFrameProvider* provider);
  47   friend class base::RefCounted<VideoFrameProviderClientImpl>;
  48   virtual ~VideoFrameProviderClientImpl();
  49
  50   VideoLayerImpl* active_video_layer_;
  51
  52   // Guards the destruction of provider_ and the frame that it provides
  53   base::Lock provider_lock_;
  54   VideoFrameProvider* provider_;
  55
  56   gfx::Transform stream_texture_matrix_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(VideoFrameProviderClientImpl);
  59 };
  60
  61 }  // namespace cc
  62
  63 #endif  // CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_