gecko-dev/dom/camera/CameraControlListener.h

128 строки
3.4 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef DOM_CAMERA_CAMERACONTROLLISTENER_H
#define DOM_CAMERA_CAMERACONTROLLISTENER_H
#include <stdint.h>
#include "ICameraControl.h"
namespace mozilla {
namespace layers {
class Image;
}
class CameraControlListener
{
public:
CameraControlListener()
{
MOZ_COUNT_CTOR(CameraControlListener);
}
protected:
// Protected destructor, to discourage deletion outside of Release():
virtual ~CameraControlListener()
{
MOZ_COUNT_DTOR(CameraControlListener);
}
public:
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CameraControlListener);
enum HardwareState
{
kHardwareUninitialized,
kHardwareClosed,
kHardwareOpen,
kHardwareOpenFailed
};
// aReason:
// NS_OK : state change was expected and normal;
// NS_ERROR_FAILURE : one or more system-level components failed and
// the camera was closed;
// NS_ERROR_NOT_AVAILABLE : the hardware is in use by another process
// and cannot be acquired, or another process
// was given access to the camera hardware.
virtual void OnHardwareStateChange(HardwareState aState, nsresult aReason) { }
enum PreviewState
{
kPreviewStopped,
kPreviewPaused,
kPreviewStarted
};
virtual void OnPreviewStateChange(PreviewState aState) { }
enum RecorderState
{
kRecorderStopped,
kRecorderStarted,
#ifdef MOZ_B2G_CAMERA
kFileSizeLimitReached,
kVideoLengthLimitReached,
kTrackCompleted,
kTrackFailed,
kMediaRecorderFailed,
kMediaServerFailed
#endif
};
enum { kNoTrackNumber = -1 };
virtual void OnRecorderStateChange(RecorderState aState, int32_t aStatus, int32_t aTrackNum) { }
virtual void OnShutter() { }
virtual void OnRateLimitPreview(bool aLimit) { }
virtual bool OnNewPreviewFrame(layers::Image* aFrame, uint32_t aWidth, uint32_t aHeight)
{
return false;
}
class CameraListenerConfiguration : public ICameraControl::Configuration
{
public:
uint32_t mMaxMeteringAreas;
uint32_t mMaxFocusAreas;
};
virtual void OnConfigurationChange(const CameraListenerConfiguration& aConfiguration) { }
virtual void OnAutoFocusComplete(bool aAutoFocusSucceeded) { }
virtual void OnAutoFocusMoving(bool aIsMoving) { }
virtual void OnTakePictureComplete(uint8_t* aData, uint32_t aLength, const nsAString& aMimeType) { }
virtual void OnFacesDetected(const nsTArray<ICameraControl::Face>& aFaces) { }
enum UserContext
{
kInStartCamera,
kInStopCamera,
kInAutoFocus,
kInStartFaceDetection,
kInStopFaceDetection,
kInTakePicture,
kInStartRecording,
kInStopRecording,
kInSetConfiguration,
kInStartPreview,
kInStopPreview,
kInSetPictureSize,
kInSetThumbnailSize,
kInResumeContinuousFocus,
kInUnspecified
};
// Error handler for problems arising due to user-initiated actions.
virtual void OnUserError(UserContext aContext, nsresult aError) { }
enum SystemContext
{
kSystemService
};
// Error handler for problems arising due to system failures, not triggered
// by something the CameraControl API user did.
virtual void OnSystemError(SystemContext aContext, nsresult aError) { }
};
} // namespace mozilla
#endif // DOM_CAMERA_CAMERACONTROLLISTENER_H