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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QFFMPEGCAMERA_H
#define QFFMPEGCAMERA_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <private/qplatformcamera_p.h>
#include <private/qplatformvideodevices_p.h>
#include <private/qplatformmediaintegration_p.h>
#include <qfilesystemwatcher.h>
#include <qsocketnotifier.h>
#include <qmutex.h>
QT_BEGIN_NAMESPACE
class QV4L2CameraDevices : public QObject,
public QPlatformVideoDevices
{
Q_OBJECT
public:
QV4L2CameraDevices(QPlatformMediaIntegration *integration);
QList<QCameraDevice> videoDevices() const override;
public Q_SLOTS:
void checkCameras();
private:
void doCheckCameras();
QList<QCameraDevice> cameras;
QFileSystemWatcher deviceWatcher;
};
struct QV4L2CameraBuffers
{
public:
~QV4L2CameraBuffers();
void release(int index);
void unmapBuffers();
QAtomicInt ref;
QMutex mutex;
struct MappedBuffer {
void *data;
qsizetype size;
};
QList<MappedBuffer> mappedBuffers;
int v4l2FileDescriptor = -1;
};
class Q_MULTIMEDIA_EXPORT QV4L2Camera : public QPlatformCamera
{
Q_OBJECT
public:
explicit QV4L2Camera(QCamera *parent);
~QV4L2Camera();
bool isActive() const override;
void setActive(bool active) override;
void setCamera(const QCameraDevice &camera) override;
bool setCameraFormat(const QCameraFormat &format) override;
bool resolveCameraFormat(const QCameraFormat &format);
bool isFocusModeSupported(QCamera::FocusMode mode) const override;
void setFocusMode(QCamera::FocusMode /*mode*/) override;
// void setCustomFocusPoint(const QPointF &/*point*/) override;
void setFocusDistance(float) override;
void zoomTo(float /*newZoomFactor*/, float /*rate*/ = -1.) override;
void setFlashMode(QCamera::FlashMode /*mode*/) override;
bool isFlashModeSupported(QCamera::FlashMode mode) const override;
bool isFlashReady() const override;
void setTorchMode(QCamera::TorchMode /*mode*/) override;
bool isTorchModeSupported(QCamera::TorchMode mode) const override;
void setExposureMode(QCamera::ExposureMode) override;
bool isExposureModeSupported(QCamera::ExposureMode mode) const override;
void setExposureCompensation(float) override;
int isoSensitivity() const override;
void setManualIsoSensitivity(int) override;
void setManualExposureTime(float) override;
float exposureTime() const override;
bool isWhiteBalanceModeSupported(QCamera::WhiteBalanceMode mode) const override;
void setWhiteBalanceMode(QCamera::WhiteBalanceMode /*mode*/) override;
void setColorTemperature(int /*temperature*/) override;
void releaseBuffer(int index);
private Q_SLOTS:
void readFrame();
private:
void setCameraBusy();
bool m_active = false;
QCameraDevice m_cameraDevice;
void initV4L2Controls();
void closeV4L2Fd();
int setV4L2ColorTemperature(int temperature);
bool setV4L2Parameter(quint32 id, qint32 value);
int getV4L2Parameter(quint32 id) const;
void setV4L2CameraFormat();
void initMMap();
void startCapturing();
void stopCapturing();
QSocketNotifier *notifier = nullptr;
QExplicitlySharedDataPointer<QV4L2CameraBuffers> d;
bool v4l2AutoWhiteBalanceSupported = false;
bool v4l2ColorTemperatureSupported = false;
bool v4l2AutoExposureSupported = false;
bool v4l2ManualExposureSupported = false;
qint32 v4l2MinColorTemp = 5600; // Daylight...
qint32 v4l2MaxColorTemp = 5600;
qint32 v4l2MinExposure = 0;
qint32 v4l2MaxExposure = 0;
qint32 v4l2MinExposureAdjustment = 0;
qint32 v4l2MaxExposureAdjustment = 0;
qint32 v4l2MinFocus = 0;
qint32 v4l2MaxFocus = 0;
qint32 v4l2RangedFocus = false;
bool v4l2FlashSupported = false;
bool v4l2TorchSupported = false;
int v4l2MinZoom = 0;
int v4l2MaxZoom = 0;
timeval firstFrameTime = {-1, -1};
int bytesPerLine = -1;
QVideoFrameFormat::ColorSpace colorSpace = QVideoFrameFormat::ColorSpace_Undefined;
qint64 frameDuration = -1;
bool cameraBusy = false;
};
QT_END_NAMESPACE
#endif // QFFMPEGCAMERA_H
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