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| |
| #include "avfcameraflashcontrol.h" |
| #include "avfcamerautility.h" |
| #include "avfcamerasession.h" |
| #include "avfcameraservice.h" |
| #include "avfcameradebug.h" |
| |
| #include <QtCore/qdebug.h> |
| |
| #include <AVFoundation/AVFoundation.h> |
| |
| |
| AVFCameraFlashControl::AVFCameraFlashControl(AVFCameraService *service) |
| : m_service(service) |
| , m_session(nullptr) |
| , m_supportedModes(QCameraExposure::FlashOff) |
| , m_flashMode(QCameraExposure::FlashOff) |
| { |
| Q_ASSERT(service); |
| m_session = m_service->session(); |
| Q_ASSERT(m_session); |
| |
| connect(m_session, SIGNAL(stateChanged(QCamera::State)), SLOT(cameraStateChanged(QCamera::State))); |
| } |
| |
| QCameraExposure::FlashModes AVFCameraFlashControl::flashMode() const |
| { |
| return m_flashMode; |
| } |
| |
| void AVFCameraFlashControl::setFlashMode(QCameraExposure::FlashModes mode) |
| { |
| if (m_flashMode == mode) |
| return; |
| |
| if (m_session->state() == QCamera::ActiveState && !isFlashModeSupported(mode)) { |
| qDebugCamera() << Q_FUNC_INFO << "unsupported mode" << mode; |
| return; |
| } |
| |
| m_flashMode = mode; |
| |
| if (m_session->state() != QCamera::ActiveState) |
| return; |
| |
| applyFlashSettings(); |
| } |
| |
| bool AVFCameraFlashControl::isFlashModeSupported(QCameraExposure::FlashModes mode) const |
| { |
| // From what QCameraExposure has, we can support only these: |
| // FlashAuto = 0x1, |
| // FlashOff = 0x2, |
| // FlashOn = 0x4, |
| // AVCaptureDevice has these flash modes: |
| // AVCaptureFlashModeAuto |
| // AVCaptureFlashModeOff |
| // AVCaptureFlashModeOn |
| // QCameraExposure also has: |
| // FlashTorch = 0x20, --> "Constant light source." |
| // FlashVideoLight = 0x40. --> "Constant light source." |
| // AVCaptureDevice: |
| // AVCaptureTorchModeOff (no mapping) |
| // AVCaptureTorchModeOn --> FlashVideoLight |
| // AVCaptureTorchModeAuto (no mapping) |
| |
| return m_supportedModes & mode; |
| } |
| |
| bool AVFCameraFlashControl::isFlashReady() const |
| { |
| if (m_session->state() != QCamera::ActiveState) |
| return false; |
| |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) |
| return false; |
| |
| if (!captureDevice.hasFlash && !captureDevice.hasTorch) |
| return false; |
| |
| if (!isFlashModeSupported(m_flashMode)) |
| return false; |
| |
| #ifdef Q_OS_IOS |
| // AVCaptureDevice's docs: |
| // "The flash may become unavailable if, for example, |
| // the device overheats and needs to cool off." |
| if (m_flashMode != QCameraExposure::FlashVideoLight) |
| return [captureDevice isFlashAvailable]; |
| |
| return [captureDevice isTorchAvailable]; |
| #endif |
| |
| return true; |
| } |
| |
| void AVFCameraFlashControl::cameraStateChanged(QCamera::State newState) |
| { |
| if (newState == QCamera::UnloadedState) { |
| m_supportedModes = QCameraExposure::FlashOff; |
| Q_EMIT flashReady(false); |
| } else if (newState == QCamera::ActiveState) { |
| m_supportedModes = QCameraExposure::FlashOff; |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) { |
| qDebugCamera() << Q_FUNC_INFO << "no capture device in 'Active' state"; |
| Q_EMIT flashReady(false); |
| return; |
| } |
| |
| if (captureDevice.hasFlash) { |
| if ([captureDevice isFlashModeSupported:AVCaptureFlashModeOn]) |
| m_supportedModes |= QCameraExposure::FlashOn; |
| if ([captureDevice isFlashModeSupported:AVCaptureFlashModeAuto]) |
| m_supportedModes |= QCameraExposure::FlashAuto; |
| } |
| |
| if (captureDevice.hasTorch && [captureDevice isTorchModeSupported:AVCaptureTorchModeOn]) |
| m_supportedModes |= QCameraExposure::FlashVideoLight; |
| |
| Q_EMIT flashReady(applyFlashSettings()); |
| } |
| } |
| |
| bool AVFCameraFlashControl::applyFlashSettings() |
| { |
| Q_ASSERT(m_session->requestedState() == QCamera::ActiveState); |
| |
| AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); |
| if (!captureDevice) { |
| qDebugCamera() << Q_FUNC_INFO << "no capture device found"; |
| return false; |
| } |
| |
| if (!isFlashModeSupported(m_flashMode)) { |
| qDebugCamera() << Q_FUNC_INFO << "unsupported mode" << m_flashMode; |
| return false; |
| } |
| |
| if (!captureDevice.hasFlash && !captureDevice.hasTorch) { |
| // FlashOff is the only mode we support. |
| // Return false - flash is not ready. |
| return false; |
| } |
| |
| const AVFConfigurationLock lock(captureDevice); |
| |
| if (m_flashMode != QCameraExposure::FlashVideoLight) { |
| if (captureDevice.torchMode != AVCaptureTorchModeOff) { |
| #ifdef Q_OS_IOS |
| if (![captureDevice isTorchAvailable]) { |
| qDebugCamera() << Q_FUNC_INFO << "torch is not available at the moment"; |
| return false; |
| } |
| #endif |
| captureDevice.torchMode = AVCaptureTorchModeOff; |
| } |
| #ifdef Q_OS_IOS |
| if (![captureDevice isFlashAvailable]) { |
| // We'd like to switch flash (into some mode), but it's not available: |
| qDebugCamera() << Q_FUNC_INFO << "flash is not available at the moment"; |
| return false; |
| } |
| #endif |
| } else { |
| if (captureDevice.flashMode != AVCaptureFlashModeOff) { |
| #ifdef Q_OS_IOS |
| if (![captureDevice isFlashAvailable]) { |
| qDebugCamera() << Q_FUNC_INFO << "flash is not available at the moment"; |
| return false; |
| } |
| #endif |
| captureDevice.flashMode = AVCaptureFlashModeOff; |
| } |
| |
| #ifdef Q_OS_IOS |
| if (![captureDevice isTorchAvailable]) { |
| qDebugCamera() << Q_FUNC_INFO << "torch is not available at the moment"; |
| return false; |
| } |
| #endif |
| } |
| |
| if (m_flashMode == QCameraExposure::FlashOff) |
| captureDevice.flashMode = AVCaptureFlashModeOff; |
| else if (m_flashMode == QCameraExposure::FlashOn) |
| captureDevice.flashMode = AVCaptureFlashModeOn; |
| else if (m_flashMode == QCameraExposure::FlashAuto) |
| captureDevice.flashMode = AVCaptureFlashModeAuto; |
| else if (m_flashMode == QCameraExposure::FlashVideoLight) |
| captureDevice.torchMode = AVCaptureTorchModeOn; |
| |
| return true; |
| } |