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85 lines
3.1 KiB
85 lines
3.1 KiB
/* |
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Copyright © 2015 by The qTox Project |
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This file is part of qTox, a Qt-based graphical interface for Tox. |
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qTox is libre software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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qTox is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with qTox. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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#ifndef CAMERADEVICE_H |
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#define CAMERADEVICE_H |
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#include <QHash> |
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#include <QString> |
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#include <QMutex> |
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#include <QVector> |
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#include <atomic> |
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#include "videomode.h" |
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struct AVFormatContext; |
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struct AVInputFormat; |
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struct AVDeviceInfoList; |
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struct AVDictionary; |
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/// Maintains an FFmpeg context for open camera devices, |
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/// takes care of sharing the context accross users |
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/// and closing the camera device when not in use. |
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/// The device can be opened recursively, |
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/// and must then be closed recursively |
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class CameraDevice |
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{ |
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public: |
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/// Opens a device, creating a new one if needed |
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/// Returns a nullptr if the device couldn't be opened |
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static CameraDevice* open(QString devName); |
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/// Opens a device, creating a new one if needed |
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/// If the device is alreay open in another mode, the mode |
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/// will be ignored and the existing device is used |
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/// If the mode does not exist, a new device can't be opened |
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/// Returns a nullptr if the device couldn't be opened |
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static CameraDevice* open(QString devName, VideoMode mode); |
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void open(); ///< Opens the device again. Never fails |
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bool close(); ///< Closes the device. Never fails. If returns true, "this" becomes invalid |
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/// Returns a list of device names and descriptions |
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/// The names are the first part of the pair and can be passed to open(QString) |
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static QVector<QPair<QString, QString>> getDeviceList(); |
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/// Get the list of video modes for a device |
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static QVector<VideoMode> getVideoModes(QString devName); |
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/// Returns the short name of the default defice |
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/// This is either the device in the settings |
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/// or the system default. |
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static QString getDefaultDeviceName(); |
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private: |
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CameraDevice(const QString &devName, AVFormatContext *context); |
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static CameraDevice* open(QString devName, AVDictionary** options); |
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static bool getDefaultInputFormat(); ///< Sets CameraDevice::iformat, returns success/failure |
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static QVector<QPair<QString, QString> > getRawDeviceListGeneric(); ///< Uses avdevice_list_devices |
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public: |
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const QString devName; ///< Short name of the device |
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AVFormatContext* context; ///< Context of the open device, must always be valid |
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private: |
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std::atomic_int refcount; ///< Number of times the device was opened |
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static QHash<QString, CameraDevice*> openDevices; |
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static QMutex openDeviceLock, iformatLock; |
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static AVInputFormat* iformat, *idesktopFormat; |
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}; |
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#endif // CAMERADEVICE_H
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