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120 lines
4.4 KiB
C++
120 lines
4.4 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MediaEngineGonkVideoSource_h_
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#define MediaEngineGonkVideoSource_h_
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#ifndef MOZ_B2G_CAMERA
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#error MediaEngineGonkVideoSource is only available when MOZ_B2G_CAMERA is defined.
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#endif
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#include "CameraControlListener.h"
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#include "MediaEngineCameraVideoSource.h"
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#include "mozilla/Hal.h"
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#include "mozilla/ReentrantMonitor.h"
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#include "mozilla/dom/File.h"
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namespace mozilla {
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/**
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* The B2G implementation of the MediaEngine interface.
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*
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* On B2G platform, member data may accessed from different thread after construction:
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*
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* MediaThread:
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* mState, mImage, mWidth, mHeight, mCapability, mPrefs, mDeviceName, mUniqueId, mInitDone,
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* mSources, mImageContainer, mSources, mState, mImage, mLastCapture.
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*
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* CameraThread:
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* mDOMCameraControl, mCaptureIndex, mCameraThread, mWindowId, mCameraManager,
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* mNativeCameraControl, mPreviewStream, mState, mLastCapture, mWidth, mHeight
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*
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* Where mWidth, mHeight, mImage, mPhotoCallbacks, mRotation, mCameraAngle and
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* mBackCamera are protected by mMonitor (in parent MediaEngineCameraVideoSource)
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* mState, mLastCapture is protected by mCallbackMonitor
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* Other variable is accessed only from single thread
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*/
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class MediaEngineGonkVideoSource : public MediaEngineCameraVideoSource
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, public mozilla::hal::ScreenConfigurationObserver
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, public CameraControlListener
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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MediaEngineGonkVideoSource(int aIndex)
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: MediaEngineCameraVideoSource(aIndex, "GonkCamera.Monitor")
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, mCallbackMonitor("GonkCamera.CallbackMonitor")
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, mCameraControl(nullptr)
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, mRotation(0)
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, mBackCamera(false)
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, mOrientationChanged(true) // Correct the orientation at first time takePhoto.
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{
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Init();
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}
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virtual nsresult Allocate(const VideoTrackConstraintsN &aConstraints,
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const MediaEnginePrefs &aPrefs) MOZ_OVERRIDE;
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virtual nsresult Deallocate() MOZ_OVERRIDE;
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virtual nsresult Start(SourceMediaStream* aStream, TrackID aID) MOZ_OVERRIDE;
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virtual nsresult Stop(SourceMediaStream* aSource, TrackID aID) MOZ_OVERRIDE;
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virtual void NotifyPull(MediaStreamGraph* aGraph,
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SourceMediaStream* aSource,
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TrackID aId,
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StreamTime aDesiredTime,
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StreamTime &aLastEndTime) MOZ_OVERRIDE;
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virtual bool SatisfiesConstraintSets(
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const nsTArray<const dom::MediaTrackConstraintSet*>& aConstraintSets)
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{
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return true;
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}
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void OnHardwareStateChange(HardwareState aState, nsresult aReason) MOZ_OVERRIDE;
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void GetRotation();
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bool OnNewPreviewFrame(layers::Image* aImage, uint32_t aWidth, uint32_t aHeight) MOZ_OVERRIDE;
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void OnUserError(UserContext aContext, nsresult aError) MOZ_OVERRIDE;
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void OnTakePictureComplete(uint8_t* aData, uint32_t aLength, const nsAString& aMimeType) MOZ_OVERRIDE;
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void AllocImpl();
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void DeallocImpl();
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void StartImpl(webrtc::CaptureCapability aCapability);
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void StopImpl();
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uint32_t ConvertPixelFormatToFOURCC(int aFormat);
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void RotateImage(layers::Image* aImage, uint32_t aWidth, uint32_t aHeight);
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void Notify(const mozilla::hal::ScreenConfiguration& aConfiguration);
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nsresult TakePhoto(PhotoCallback* aCallback) MOZ_OVERRIDE;
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// It sets the correct photo orientation via camera parameter according to
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// current screen orientation.
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nsresult UpdatePhotoOrientation();
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protected:
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~MediaEngineGonkVideoSource()
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{
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Shutdown();
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}
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// Initialize the needed Video engine interfaces.
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void Init();
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void Shutdown();
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void ChooseCapability(const VideoTrackConstraintsN& aConstraints,
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const MediaEnginePrefs& aPrefs);
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mozilla::ReentrantMonitor mCallbackMonitor; // Monitor for camera callback handling
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// This is only modified on MainThread (AllocImpl and DeallocImpl)
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nsRefPtr<ICameraControl> mCameraControl;
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nsCOMPtr<nsIDOMFile> mLastCapture;
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// These are protected by mMonitor in parent class
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nsTArray<nsRefPtr<PhotoCallback>> mPhotoCallbacks;
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int mRotation;
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int mCameraAngle; // See dom/base/ScreenOrientation.h
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bool mBackCamera;
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bool mOrientationChanged; // True when screen rotates.
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};
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} // namespace mozilla
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#endif // MediaEngineGonkVideoSource_h_
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