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| ****************************************************************************/ |
| |
| #include "avfcamerafocuscontrol.h" |
| #include "avfcamerautility.h" |
| #include "avfcameraservice.h" |
| #include "avfcamerasession.h" |
| #include "avfcameradebug.h" |
| |
| #include <QtCore/qdebug.h> |
| |
| #include <AVFoundation/AVFoundation.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| namespace { |
| |
| bool qt_focus_mode_supported(QCameraFocus::FocusModes mode) |
| { |
| // Check if QCameraFocus::FocusMode has counterpart in AVFoundation. |
| |
| // AVFoundation has 'Manual', 'Auto' and 'Continuous', |
| // where 'Manual' is actually 'Locked' + writable property 'lensPosition'. |
| // Since Qt does not provide an API to manipulate a lens position, 'Maual' mode |
| // (at the moment) is not supported. |
| return mode == QCameraFocus::AutoFocus |
| || mode == QCameraFocus::ContinuousFocus; |
| } |
| |
| bool qt_focus_point_mode_supported(QCameraFocus::FocusPointMode mode) |
| { |
| return mode == QCameraFocus::FocusPointAuto |
| || mode == QCameraFocus::FocusPointCustom |
| || mode == QCameraFocus::FocusPointCenter; |
| } |
| |
| AVCaptureFocusMode avf_focus_mode(QCameraFocus::FocusModes requestedMode) |
| { |
| if (requestedMode == QCameraFocus::AutoFocus) |
| return AVCaptureFocusModeAutoFocus; |
| |
| return AVCaptureFocusModeContinuousAutoFocus; |
| } |
| |
| } |
| |
| AVFCameraFocusControl::AVFCameraFocusControl(AVFCameraService *service) |
| : m_session(service->session()), |
| m_focusMode(QCameraFocus::ContinuousFocus), |
| m_focusPointMode(QCameraFocus::FocusPointAuto), |
| m_customFocusPoint(0.5f, 0.5f), |
| m_actualFocusPoint(m_customFocusPoint) |
| { |
| Q_ASSERT(m_session); |
| connect(m_session, SIGNAL(stateChanged(QCamera::State)), SLOT(cameraStateChanged())); |
| } |
| |
| QCameraFocus::FocusModes AVFCameraFocusControl::focusMode() const |
| { |
| return m_focusMode; |
| } |
| |
| void AVFCameraFocusControl::setFocusMode(QCameraFocus::FocusModes mode) |
| { |
| if (m_focusMode == mode) |
| return; |
| |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) { |
| if (qt_focus_mode_supported(mode)) { |
| m_focusMode = mode; |
| Q_EMIT focusModeChanged(m_focusMode); |
| } else { |
| qDebugCamera() << Q_FUNC_INFO |
| << "focus mode not supported"; |
| } |
| return; |
| } |
| |
| if (isFocusModeSupported(mode)) { |
| const AVFConfigurationLock lock(captureDevice); |
| if (!lock) { |
| qDebugCamera() << Q_FUNC_INFO |
| << "failed to lock for configuration"; |
| return; |
| } |
| |
| captureDevice.focusMode = avf_focus_mode(mode); |
| m_focusMode = mode; |
| } else { |
| qDebugCamera() << Q_FUNC_INFO << "focus mode not supported"; |
| return; |
| } |
| |
| Q_EMIT focusModeChanged(m_focusMode); |
| } |
| |
| bool AVFCameraFocusControl::isFocusModeSupported(QCameraFocus::FocusModes mode) const |
| { |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) |
| return false; |
| |
| if (!qt_focus_mode_supported(mode)) |
| return false; |
| |
| return [captureDevice isFocusModeSupported:avf_focus_mode(mode)]; |
| } |
| |
| QCameraFocus::FocusPointMode AVFCameraFocusControl::focusPointMode() const |
| { |
| return m_focusPointMode; |
| } |
| |
| void AVFCameraFocusControl::setFocusPointMode(QCameraFocus::FocusPointMode mode) |
| { |
| if (m_focusPointMode == mode) |
| return; |
| |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) { |
| if (qt_focus_point_mode_supported(mode)) { |
| m_focusPointMode = mode; |
| Q_EMIT focusPointModeChanged(mode); |
| } |
| return; |
| } |
| |
| if (isFocusPointModeSupported(mode)) { |
| const AVFConfigurationLock lock(captureDevice); |
| if (!lock) { |
| qDebugCamera() << Q_FUNC_INFO << "failed to lock for configuration"; |
| return; |
| } |
| |
| bool resetPOI = false; |
| if (mode == QCameraFocus::FocusPointCenter || mode == QCameraFocus::FocusPointAuto) { |
| if (m_actualFocusPoint != QPointF(0.5, 0.5)) { |
| m_actualFocusPoint = QPointF(0.5, 0.5); |
| resetPOI = true; |
| } |
| } else if (mode == QCameraFocus::FocusPointCustom) { |
| if (m_actualFocusPoint != m_customFocusPoint) { |
| m_actualFocusPoint = m_customFocusPoint; |
| resetPOI = true; |
| } |
| } // else for any other mode in future. |
| |
| if (resetPOI) { |
| const CGPoint focusPOI = CGPointMake(m_actualFocusPoint.x(), m_actualFocusPoint.y()); |
| [captureDevice setFocusPointOfInterest:focusPOI]; |
| } |
| m_focusPointMode = mode; |
| } else { |
| qDebugCamera() << Q_FUNC_INFO << "focus point mode is not supported"; |
| return; |
| } |
| |
| Q_EMIT focusPointModeChanged(mode); |
| } |
| |
| bool AVFCameraFocusControl::isFocusPointModeSupported(QCameraFocus::FocusPointMode mode) const |
| { |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) |
| return false; |
| |
| if (!qt_focus_point_mode_supported(mode)) |
| return false; |
| |
| return [captureDevice isFocusPointOfInterestSupported]; |
| } |
| |
| QPointF AVFCameraFocusControl::customFocusPoint() const |
| { |
| return m_customFocusPoint; |
| } |
| |
| void AVFCameraFocusControl::setCustomFocusPoint(const QPointF &point) |
| { |
| if (m_customFocusPoint == point) |
| return; |
| |
| if (!QRectF(0.f, 0.f, 1.f, 1.f).contains(point)) { |
| qDebugCamera() << Q_FUNC_INFO << "invalid focus point (out of range)"; |
| return; |
| } |
| |
| m_customFocusPoint = point; |
| Q_EMIT customFocusPointChanged(m_customFocusPoint); |
| |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice || m_focusPointMode != QCameraFocus::FocusPointCustom) |
| return; |
| |
| if ([captureDevice isFocusPointOfInterestSupported]) { |
| const AVFConfigurationLock lock(captureDevice); |
| if (!lock) { |
| qDebugCamera() << Q_FUNC_INFO << "failed to lock for configuration"; |
| return; |
| } |
| |
| m_actualFocusPoint = m_customFocusPoint; |
| const CGPoint focusPOI = CGPointMake(point.x(), point.y()); |
| [captureDevice setFocusPointOfInterest:focusPOI]; |
| if (m_focusMode != QCameraFocus::ContinuousFocus) |
| [captureDevice setFocusMode:AVCaptureFocusModeAutoFocus]; |
| } else { |
| qDebugCamera() << Q_FUNC_INFO << "focus point of interest not supported"; |
| return; |
| } |
| } |
| |
| QCameraFocusZoneList AVFCameraFocusControl::focusZones() const |
| { |
| // Unsupported. |
| return QCameraFocusZoneList(); |
| } |
| |
| void AVFCameraFocusControl::cameraStateChanged() |
| { |
| if (m_session->state() != QCamera::ActiveState) |
| return; |
| |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) { |
| qDebugCamera() << Q_FUNC_INFO << "capture device is nil in 'active' state"; |
| return; |
| } |
| |
| const AVFConfigurationLock lock(captureDevice); |
| if (m_customFocusPoint != m_actualFocusPoint |
| && m_focusPointMode == QCameraFocus::FocusPointCustom) { |
| if (![captureDevice isFocusPointOfInterestSupported]) { |
| qDebugCamera() << Q_FUNC_INFO |
| << "focus point of interest not supported"; |
| return; |
| } |
| |
| if (!lock) { |
| qDebugCamera() << Q_FUNC_INFO << "failed to lock for configuration"; |
| return; |
| } |
| |
| m_actualFocusPoint = m_customFocusPoint; |
| const CGPoint focusPOI = CGPointMake(m_customFocusPoint.x(), m_customFocusPoint.y()); |
| [captureDevice setFocusPointOfInterest:focusPOI]; |
| } |
| |
| if (m_focusMode != QCameraFocus::ContinuousFocus) { |
| const AVCaptureFocusMode avMode = avf_focus_mode(m_focusMode); |
| if (captureDevice.focusMode != avMode) { |
| if (![captureDevice isFocusModeSupported:avMode]) { |
| qDebugCamera() << Q_FUNC_INFO << "focus mode not supported"; |
| return; |
| } |
| |
| if (!lock) { |
| qDebugCamera() << Q_FUNC_INFO << "failed to lock for configuration"; |
| return; |
| } |
| |
| [captureDevice setFocusMode:avMode]; |
| } |
| } |
| } |
| |
| QT_END_NAMESPACE |
| |
| #include "moc_avfcamerafocuscontrol.cpp" |
