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| 1 // Copyright 2015 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 #include "base/memory/scoped_ptr.h" |
| 6 #include "base/memory/weak_ptr.h" |
| 7 #include "base/timer/timer.h" |
| 8 #include "content/browser/media/capture/content_video_capture_device_core.h" |
| 9 #include "ui/aura/window.h" |
| 10 #include "ui/aura/window_observer.h" |
| 11 #include "ui/base/cursor/cursors_aura.h" |
| 12 #include "ui/compositor/compositor.h" |
| 13 |
| 14 namespace cc { |
| 15 |
| 16 class CopyOutputResult; |
| 17 |
| 18 } // namespace cc |
| 19 |
| 20 namespace content { |
| 21 |
| 22 class PowerSaveBlocker; |
| 23 class ReadbackYUVInterface; |
| 24 |
| 25 // Provides the VideoCaptureMachine for capturing from an AuraWindow. |
| 26 class AuraWindowCaptureMachine |
| 27 : public VideoCaptureMachine, |
| 28 public aura::WindowObserver, |
| 29 public ui::CompositorObserver, |
| 30 public base::SupportsWeakPtr<AuraWindowCaptureMachine> { |
| 31 public: |
| 32 AuraWindowCaptureMachine(); |
| 33 ~AuraWindowCaptureMachine() override; |
| 34 |
| 35 // VideoCaptureFrameSource overrides. |
| 36 bool Start(const scoped_refptr<ThreadSafeCaptureOracle>& oracle_proxy, |
| 37 const media::VideoCaptureParams& params) override; |
| 38 void Stop(const base::Closure& callback) override; |
| 39 |
| 40 // Implements aura::WindowObserver. |
| 41 void OnWindowBoundsChanged(aura::Window* window, |
| 42 const gfx::Rect& old_bounds, |
| 43 const gfx::Rect& new_bounds) override; |
| 44 void OnWindowDestroyed(aura::Window* window) override; |
| 45 void OnWindowAddedToRootWindow(aura::Window* window) override; |
| 46 void OnWindowRemovingFromRootWindow(aura::Window* window, |
| 47 aura::Window* new_root) override; |
| 48 |
| 49 // Implements ui::CompositorObserver. |
| 50 void OnCompositingDidCommit(ui::Compositor* compositor) override {} |
| 51 void OnCompositingStarted(ui::Compositor* compositor, |
| 52 base::TimeTicks start_time) override {} |
| 53 void OnCompositingEnded(ui::Compositor* compositor) override; |
| 54 void OnCompositingAborted(ui::Compositor* compositor) override {} |
| 55 void OnCompositingLockStateChanged(ui::Compositor* compositor) override {} |
| 56 void OnCompositingShuttingDown(ui::Compositor* compositor) override {} |
| 57 |
| 58 // Sets the window to use for capture. |
| 59 void SetWindow(aura::Window* window); |
| 60 |
| 61 private: |
| 62 // Captures a frame. |
| 63 // |dirty| is false for timer polls and true for compositor updates. |
| 64 void Capture(bool dirty); |
| 65 |
| 66 // Update capture size. Must be called on the UI thread. |
| 67 void UpdateCaptureSize(); |
| 68 |
| 69 // Response callback for cc::Layer::RequestCopyOfOutput(). |
| 70 void DidCopyOutput( |
| 71 scoped_refptr<media::VideoFrame> video_frame, |
| 72 base::TimeTicks start_time, |
| 73 const ThreadSafeCaptureOracle::CaptureFrameCallback& capture_frame_cb, |
| 74 scoped_ptr<cc::CopyOutputResult> result); |
| 75 |
| 76 // A helper which does the real work for DidCopyOutput. Returns true if |
| 77 // succeeded. |
| 78 bool ProcessCopyOutputResponse( |
| 79 scoped_refptr<media::VideoFrame> video_frame, |
| 80 base::TimeTicks start_time, |
| 81 const ThreadSafeCaptureOracle::CaptureFrameCallback& capture_frame_cb, |
| 82 scoped_ptr<cc::CopyOutputResult> result); |
| 83 |
| 84 // Helper function to update cursor state. |
| 85 // |region_in_frame| defines the desktop bound in the captured frame. |
| 86 // Returns the current cursor position in captured frame. |
| 87 gfx::Point UpdateCursorState(const gfx::Rect& region_in_frame); |
| 88 |
| 89 // Clears cursor state. |
| 90 void ClearCursorState(); |
| 91 |
| 92 // The window associated with the desktop. |
| 93 aura::Window* desktop_window_; |
| 94 |
| 95 // The timer that kicks off period captures. |
| 96 base::Timer timer_; |
| 97 |
| 98 // Whether screen capturing or window capture. |
| 99 bool screen_capture_; |
| 100 |
| 101 // Makes all the decisions about which frames to copy, and how. |
| 102 scoped_refptr<ThreadSafeCaptureOracle> oracle_proxy_; |
| 103 |
| 104 // The capture parameters for this capture. |
| 105 media::VideoCaptureParams capture_params_; |
| 106 |
| 107 // YUV readback pipeline. |
| 108 scoped_ptr<ReadbackYUVInterface> yuv_readback_pipeline_; |
| 109 |
| 110 // Cursor state. |
| 111 ui::Cursor last_cursor_; |
| 112 gfx::Point cursor_hot_point_; |
| 113 SkBitmap scaled_cursor_bitmap_; |
| 114 |
| 115 // TODO(jiayl): Remove power_save_blocker_ when there is an API to keep the |
| 116 // screen from sleeping for the drive-by web. |
| 117 scoped_ptr<PowerSaveBlocker> power_save_blocker_; |
| 118 |
| 119 DISALLOW_COPY_AND_ASSIGN(AuraWindowCaptureMachine); |
| 120 }; |
| 121 |
| 122 } // namespace content |
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