| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_ |
| #define CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "base/synchronization/lock.h" |
| #include "base/threading/thread_checker.h" |
| #include "cc/cc_export.h" |
| #include "cc/layers/video_frame_provider.h" |
| #include "cc/scheduler/video_frame_controller.h" |
| #include "ui/gfx/transform.h" |
| |
| namespace media { class VideoFrame; } |
| |
| namespace cc { |
| class VideoLayerImpl; |
| |
| // VideoFrameProviderClientImpl liasons with the VideoFrameProvider and the |
| // VideoLayer. It receives updates from the provider and updates the layer as a |
| // result. It also allows the layer to access the video frame that the provider |
| // has. |
| class CC_EXPORT VideoFrameProviderClientImpl |
| : public VideoFrameProvider::Client, |
| public VideoFrameController, |
| public base::RefCounted<VideoFrameProviderClientImpl> { |
| public: |
| // Must be created on the impl thread while the main thread is blocked. |
| static scoped_refptr<VideoFrameProviderClientImpl> Create( |
| VideoFrameProvider* provider, |
| VideoFrameControllerClient* client); |
| |
| VideoFrameProviderClientImpl(const VideoFrameProviderClientImpl&) = delete; |
| VideoFrameProviderClientImpl& operator=(const VideoFrameProviderClientImpl&) = |
| delete; |
| |
| VideoLayerImpl* ActiveVideoLayer() const; |
| void SetActiveVideoLayer(VideoLayerImpl* video_layer); |
| |
| bool Stopped() const; |
| // Must be called on the impl thread while the main thread is blocked. |
| void Stop(); |
| |
| scoped_refptr<media::VideoFrame> AcquireLockAndCurrentFrame(); |
| void PutCurrentFrame(); |
| void ReleaseLock(); |
| bool HasCurrentFrame(); |
| |
| // VideoFrameController implementation. |
| void OnBeginFrame(const viz::BeginFrameArgs& args) override; |
| void DidDrawFrame() override; |
| |
| // VideoFrameProvider::Client implementation. |
| // Called on the main thread. |
| void StopUsingProvider() override; |
| // Called on the impl thread. |
| void StartRendering() override; |
| void StopRendering() override; |
| void DidReceiveFrame() override; |
| bool IsDrivingFrameUpdates() const override; |
| |
| const VideoFrameProvider* get_provider_for_testing() const { |
| return provider_; |
| } |
| |
| private: |
| friend class base::RefCounted<VideoFrameProviderClientImpl>; |
| |
| VideoFrameProviderClientImpl(VideoFrameProvider* provider, |
| VideoFrameControllerClient* client); |
| ~VideoFrameProviderClientImpl() override; |
| |
| VideoFrameProvider* provider_; |
| VideoFrameControllerClient* client_; |
| VideoLayerImpl* active_video_layer_; |
| bool stopped_; |
| bool rendering_; |
| bool needs_put_current_frame_; |
| |
| // Since the provider lives on another thread, it can be destroyed while the |
| // frame controller are accessing its frame. Before being destroyed the |
| // provider calls StopUsingProvider. provider_lock_ blocks StopUsingProvider |
| // from returning until the frame controller is done using the frame. |
| base::Lock provider_lock_; |
| base::ThreadChecker thread_checker_; |
| }; |
| |
| } // namespace cc |
| |
| #endif // CC_LAYERS_VIDEO_FRAME_PROVIDER_CLIENT_IMPL_H_ |