mirror of
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149 lines
5.9 KiB
C++
149 lines
5.9 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 DOM_CAMERA_CAMERACONTROLIMPL_H
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#define DOM_CAMERA_CAMERACONTROLIMPL_H
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#include "nsTArray.h"
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#include "nsWeakPtr.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/ReentrantMonitor.h"
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#include "mozilla/Mutex.h"
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#include "nsIFile.h"
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#include "nsProxyRelease.h"
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#include "ICameraControl.h"
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#include "CameraCommon.h"
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#include "DeviceStorage.h"
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#include "DeviceStorageFileDescriptor.h"
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#include "CameraControlListener.h"
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namespace mozilla {
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namespace dom {
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class BlobImpl;
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} // namespace dom
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namespace layers {
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class Image;
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} // namespace layers
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class CameraControlImpl : public ICameraControl
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{
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public:
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explicit CameraControlImpl();
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virtual void AddListener(CameraControlListener* aListener) override;
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virtual void RemoveListener(CameraControlListener* aListener) override;
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// See ICameraControl.h for these methods' return values.
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virtual nsresult Start(const Configuration* aConfig = nullptr) override;
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virtual nsresult Stop() override;
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virtual nsresult SetConfiguration(const Configuration& aConfig) override;
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virtual nsresult StartPreview() override;
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virtual nsresult StopPreview() override;
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virtual nsresult AutoFocus() override;
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virtual nsresult StartFaceDetection() override;
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virtual nsresult StopFaceDetection() override;
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virtual nsresult TakePicture() override;
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virtual nsresult StartRecording(DeviceStorageFileDescriptor* aFileDescriptor,
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const StartRecordingOptions* aOptions) override;
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virtual nsresult StopRecording() override;
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virtual nsresult PauseRecording() override;
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virtual nsresult ResumeRecording() override;
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virtual nsresult ResumeContinuousFocus() override;
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// Event handlers called directly from outside this class.
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void OnShutter();
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void OnUserError(CameraControlListener::UserContext aContext, nsresult aError);
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void OnSystemError(CameraControlListener::SystemContext aContext, nsresult aError);
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void OnAutoFocusMoving(bool aIsMoving);
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protected:
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// Event handlers.
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void OnAutoFocusComplete(bool aAutoFocusSucceeded);
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void OnFacesDetected(const nsTArray<Face>& aFaces);
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void OnTakePictureComplete(const uint8_t* aData, uint32_t aLength, const nsAString& aMimeType);
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void OnPoster(dom::BlobImpl* aBlobImpl);
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void OnRateLimitPreview(bool aLimit);
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bool OnNewPreviewFrame(layers::Image* aImage, uint32_t aWidth, uint32_t aHeight);
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void OnRecorderStateChange(CameraControlListener::RecorderState aState,
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int32_t aStatus = -1, int32_t aTrackNumber = -1);
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void OnPreviewStateChange(CameraControlListener::PreviewState aState);
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void OnHardwareStateChange(CameraControlListener::HardwareState aState,
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nsresult aReason);
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void OnConfigurationChange();
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// When we create a new CameraThread, we keep a static reference to it so
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// that multiple CameraControl instances can find and reuse it; but we
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// don't want that reference to keep the thread object around unnecessarily,
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// so we make it a weak reference. The strong dynamic references will keep
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// the thread object alive as needed.
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static StaticRefPtr<nsIThread> sCameraThread;
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nsCOMPtr<nsIThread> mCameraThread;
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virtual ~CameraControlImpl();
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virtual void BeginBatchParameterSet() override { }
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virtual void EndBatchParameterSet() override { }
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// Manage camera event listeners.
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void AddListenerImpl(already_AddRefed<CameraControlListener> aListener);
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void RemoveListenerImpl(CameraControlListener* aListener);
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nsTArray<RefPtr<CameraControlListener> > mListeners;
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mutable Mutex mListenerLock;
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class ControlMessage;
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class ListenerMessage;
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nsresult Dispatch(ControlMessage* aMessage);
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// Asynchronous method implementations, invoked on the Camera Thread.
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//
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// Return values:
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// - NS_OK on success;
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// - NS_ERROR_INVALID_ARG if one or more arguments is invalid;
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// - NS_ERROR_NOT_INITIALIZED if the underlying hardware is not initialized,
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// failed to initialize (in the case of StartImpl()), or has been stopped;
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// for StartRecordingImpl(), this indicates that no recorder has been
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// configured (either by calling StartImpl() or SetConfigurationImpl());
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// - NS_ERROR_ALREADY_INITIALIZED if the underlying hardware is already
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// initialized;
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// - NS_ERROR_NOT_IMPLEMENTED if the method is not implemented;
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// - NS_ERROR_FAILURE on general failures.
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virtual nsresult StartImpl(const Configuration* aConfig = nullptr) = 0;
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virtual nsresult StopImpl() = 0;
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virtual nsresult SetConfigurationImpl(const Configuration& aConfig) = 0;
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virtual nsresult StartPreviewImpl() = 0;
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virtual nsresult StopPreviewImpl() = 0;
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virtual nsresult AutoFocusImpl() = 0;
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virtual nsresult StartFaceDetectionImpl() = 0;
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virtual nsresult StopFaceDetectionImpl() = 0;
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virtual nsresult TakePictureImpl() = 0;
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virtual nsresult StartRecordingImpl(DeviceStorageFileDescriptor* aFileDescriptor,
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const StartRecordingOptions* aOptions) = 0;
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virtual nsresult StopRecordingImpl() = 0;
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virtual nsresult PauseRecordingImpl() = 0;
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virtual nsresult ResumeRecordingImpl() = 0;
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virtual nsresult ResumeContinuousFocusImpl() = 0;
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virtual nsresult PushParametersImpl() = 0;
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virtual nsresult PullParametersImpl() = 0;
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void OnShutterInternal();
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void OnClosedInternal();
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CameraControlListener::CameraListenerConfiguration mCurrentConfiguration;
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CameraControlListener::PreviewState mPreviewState;
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CameraControlListener::HardwareState mHardwareState;
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nsresult mHardwareStateChangeReason;
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private:
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CameraControlImpl(const CameraControlImpl&) = delete;
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CameraControlImpl& operator=(const CameraControlImpl&) = delete;
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};
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} // namespace mozilla
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#endif // DOM_CAMERA_CAMERACONTROLIMPL_H
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