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// Copyright 2015 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 CONTENT_BROWSER_MEDIA_CAPTURE_AURA_WINDOW_CAPTURE_MACHINE_H_
#define CONTENT_BROWSER_MEDIA_CAPTURE_AURA_WINDOW_CAPTURE_MACHINE_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/timer/timer.h"
#include "content/browser/media/capture/cursor_renderer_aura.h"
#include "media/capture/content/screen_capture_device_core.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
#include "ui/base/cursor/cursors_aura.h"
#include "ui/compositor/compositor.h"
namespace cc {
class CopyOutputResult;
} // namespace cc
namespace content {
class PowerSaveBlocker;
class ReadbackYUVInterface;
class AuraWindowCaptureMachine
: public media::VideoCaptureMachine,
public aura::WindowObserver,
public ui::CompositorObserver {
public:
AuraWindowCaptureMachine();
~AuraWindowCaptureMachine() override;
// VideoCaptureMachine overrides.
void Start(const scoped_refptr<media::ThreadSafeCaptureOracle>& oracle_proxy,
const media::VideoCaptureParams& params,
const base::Callback<void(bool)> callback) override;
void Stop(const base::Closure& callback) override;
// Implements aura::WindowObserver.
void OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) override;
void OnWindowDestroying(aura::Window* window) override;
void OnWindowAddedToRootWindow(aura::Window* window) override;
void OnWindowRemovingFromRootWindow(aura::Window* window,
aura::Window* new_root) override;
// Implements ui::CompositorObserver.
void OnCompositingDidCommit(ui::Compositor* compositor) override {}
void OnCompositingStarted(ui::Compositor* compositor,
base::TimeTicks start_time) override {}
void OnCompositingEnded(ui::Compositor* compositor) override;
void OnCompositingAborted(ui::Compositor* compositor) override {}
void OnCompositingLockStateChanged(ui::Compositor* compositor) override {}
void OnCompositingShuttingDown(ui::Compositor* compositor) override {}
// Sets the window to use for capture.
void SetWindow(aura::Window* window);
private:
bool InternalStart(
const scoped_refptr<media::ThreadSafeCaptureOracle>& oracle_proxy,
const media::VideoCaptureParams& params);
void InternalStop(const base::Closure& callback);
// Captures a frame.
// |dirty| is false for timer polls and true for compositor updates.
void Capture(bool dirty);
// Update capture size. Must be called on the UI thread.
void UpdateCaptureSize();
using CaptureFrameCallback =
media::ThreadSafeCaptureOracle::CaptureFrameCallback;
// Response callback for cc::Layer::RequestCopyOfOutput().
void DidCopyOutput(
scoped_refptr<media::VideoFrame> video_frame,
base::TimeTicks start_time,
const CaptureFrameCallback& capture_frame_cb,
scoped_ptr<cc::CopyOutputResult> result);
// A helper which does the real work for DidCopyOutput. Returns true if
// succeeded.
bool ProcessCopyOutputResponse(
scoped_refptr<media::VideoFrame> video_frame,
base::TimeTicks start_time,
const CaptureFrameCallback& capture_frame_cb,
scoped_ptr<cc::CopyOutputResult> result);
// Renders the cursor if needed and then delivers the captured frame.
static void CopyOutputFinishedForVideo(
base::WeakPtr<AuraWindowCaptureMachine> machine,
base::TimeTicks start_time,
const CaptureFrameCallback& capture_frame_cb,
const scoped_refptr<media::VideoFrame>& target,
scoped_ptr<cc::SingleReleaseCallback> release_callback,
bool result);
// The window associated with the desktop.
aura::Window* desktop_window_;
// The timer that kicks off period captures.
base::Timer timer_;
// Whether screen capturing or window capture.
bool screen_capture_;
// Makes all the decisions about which frames to copy, and how.
scoped_refptr<media::ThreadSafeCaptureOracle> oracle_proxy_;
// The capture parameters for this capture.
media::VideoCaptureParams capture_params_;
// YUV readback pipeline.
scoped_ptr<content::ReadbackYUVInterface> yuv_readback_pipeline_;
// Renders mouse cursor on frame.
scoped_ptr<content::CursorRendererAura> cursor_renderer_;
// TODO(jiayl): Remove power_save_blocker_ when there is an API to keep the
// screen from sleeping for the drive-by web.
scoped_ptr<PowerSaveBlocker> power_save_blocker_;
// WeakPtrs are used for the asynchronous capture callbacks passed to external
// modules. They are only valid on the UI thread and become invalidated
// immediately when InternalStop() is called to ensure that no more captured
// frames will be delivered to the client.
base::WeakPtrFactory<AuraWindowCaptureMachine> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(AuraWindowCaptureMachine);
};
} // namespace content
#endif // CONTENT_BROWSER_MEDIA_CAPTURE_AURA_WINDOW_CAPTURE_MACHINE_H_
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