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Diffstat (limited to 'src/plugins/avfoundation/camera/avfcamerazoomcontrol.mm')
| -rw-r--r-- | src/plugins/avfoundation/camera/avfcamerazoomcontrol.mm | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/src/plugins/avfoundation/camera/avfcamerazoomcontrol.mm b/src/plugins/avfoundation/camera/avfcamerazoomcontrol.mm new file mode 100644 index 000000000..bbd20acee --- /dev/null +++ b/src/plugins/avfoundation/camera/avfcamerazoomcontrol.mm @@ -0,0 +1,188 @@ +/**************************************************************************** +** +** Copyright (C) 2015 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "avfcamerazoomcontrol.h" +#include "avfconfigurationlock.h" +#include "avfcameraservice.h" +#include "avfcamerasession.h" +#include "avfcameracontrol.h" +#include "avfcameradebug.h" + +#include <QtCore/qsysinfo.h> +#include <QtCore/qglobal.h> +#include <QtCore/qdebug.h> + +QT_BEGIN_NAMESPACE + +AVFCameraZoomControl::AVFCameraZoomControl(AVFCameraService *service) + : m_session(service->session()), + m_maxZoomFactor(1.), + m_zoomFactor(1.), + m_requestedZoomFactor(1.) +{ + Q_ASSERT(m_session); + connect(m_session, SIGNAL(stateChanged(QCamera::State)), + SLOT(cameraStateChanged())); +} + +qreal AVFCameraZoomControl::maximumOpticalZoom() const +{ + // Not supported. + return 1.; +} + +qreal AVFCameraZoomControl::maximumDigitalZoom() const +{ + return m_maxZoomFactor; +} + +qreal AVFCameraZoomControl::requestedOpticalZoom() const +{ + // Not supported. + return 1; +} + +qreal AVFCameraZoomControl::requestedDigitalZoom() const +{ + return m_requestedZoomFactor; +} + +qreal AVFCameraZoomControl::currentOpticalZoom() const +{ + // Not supported. + return 1.; +} + +qreal AVFCameraZoomControl::currentDigitalZoom() const +{ + return m_zoomFactor; +} + +void AVFCameraZoomControl::zoomTo(qreal optical, qreal digital) +{ + Q_UNUSED(optical) + Q_UNUSED(digital) +#if QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__IPHONE_7_0) + if (QSysInfo::MacintoshVersion < QSysInfo::MV_IOS_7_0) + return; + + if (qFuzzyCompare(CGFloat(digital), m_requestedZoomFactor)) + return; + + m_requestedZoomFactor = digital; + Q_EMIT requestedDigitalZoomChanged(digital); + + zoomToRequestedDigital(); +#endif +} + +void AVFCameraZoomControl::cameraStateChanged() +{ +#if QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__IPHONE_7_0) + if (QSysInfo::MacintoshVersion < QSysInfo::MV_IOS_7_0) + return; + + const QCamera::State state = m_session->state(); + if (state != QCamera::ActiveState) { + if (state == QCamera::UnloadedState && m_maxZoomFactor > 1.) { + m_maxZoomFactor = 1.; + Q_EMIT maximumDigitalZoomChanged(1.); + } + return; + } + + AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); + if (!captureDevice || !captureDevice.activeFormat) { + qDebugCamera() << Q_FUNC_INFO << "camera state is active, but" + << "video capture device and/or active format is nil"; + return; + } + + if (captureDevice.activeFormat.videoMaxZoomFactor > 1. + && !qFuzzyCompare(m_maxZoomFactor, captureDevice.activeFormat.videoMaxZoomFactor)) { + m_maxZoomFactor = captureDevice.activeFormat.videoMaxZoomFactor; + + Q_EMIT maximumDigitalZoomChanged(m_maxZoomFactor); + } else if (!qFuzzyCompare(m_maxZoomFactor, CGFloat(1.))) { + m_maxZoomFactor = 1.; + + Q_EMIT maximumDigitalZoomChanged(1.); + } + + zoomToRequestedDigital(); +#endif +} + +void AVFCameraZoomControl::zoomToRequestedDigital() +{ +#if QT_IOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__IPHONE_7_0) + if (QSysInfo::MacintoshVersion < QSysInfo::MV_IOS_7_0) + return; + + AVCaptureDevice *captureDevice = m_session->videoCaptureDevice(); + if (!captureDevice || !captureDevice.activeFormat) + return; + + if (qFuzzyCompare(captureDevice.activeFormat.videoMaxZoomFactor, CGFloat(1.))) + return; + + const CGFloat clampedZoom = qBound(CGFloat(1.), m_requestedZoomFactor, + captureDevice.activeFormat.videoMaxZoomFactor); + const CGFloat deviceZoom = captureDevice.videoZoomFactor; + if (qFuzzyCompare(clampedZoom, deviceZoom)) { + // Nothing to set, but check if a signal must be emitted: + if (!qFuzzyCompare(m_zoomFactor, deviceZoom)) { + m_zoomFactor = deviceZoom; + Q_EMIT currentDigitalZoomChanged(deviceZoom); + } + return; + } + + const AVFConfigurationLock lock(captureDevice); + if (!lock) { + qDebugCamera() << Q_FUNC_INFO << "failed to lock for configuration"; + return; + } + + captureDevice.videoZoomFactor = clampedZoom; + + if (!qFuzzyCompare(clampedZoom, m_zoomFactor)) { + m_zoomFactor = clampedZoom; + Q_EMIT currentDigitalZoomChanged(clampedZoom); + } +#endif +} + +QT_END_NAMESPACE + +#include "moc_avfcamerazoomcontrol.cpp" |