androidvideo/video_device_monitor_impl.cpp

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/*
 *  Copyright (C) 2004-2025 Savoir-faire Linux Inc.
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program. If not, see <https://www.gnu.org/licenses/>.
 */
 
#include "../video_device_monitor.h"
#include "logger.h"
#include "noncopyable.h"
 
#include "client/ring_signal.h"
 
#include <algorithm>
#include <mutex>
#include <sstream>
#include <stdexcept> // for std::runtime_error
#include <string>
#include <thread>
#include <vector>
 
namespace jami {
namespace video {
 
using std::vector;
using std::string;
 
class VideoDeviceMonitorImpl
{
    /*
     * This class is instantiated in VideoDeviceMonitor's constructor. The
     * daemon has a global VideoManager, and it contains a VideoDeviceMonitor.
     * So, when the library is loaded on Android, VideoDeviceMonitorImpl will
     * be instantiated before we get a chance to register callbacks. At this
     * point, if we use emitSignal to get a list of cameras, it will simply
     * do nothing.
     * To work around this issue, functions have been added in the video
     * manager interface to allow to add/remove devices from Java code.
     * To conclude, this class is just an empty stub.
     */
public:
    VideoDeviceMonitorImpl(VideoDeviceMonitor* monitor);
    ~VideoDeviceMonitorImpl();
 
    void start();
 
private:
    NON_COPYABLE(VideoDeviceMonitorImpl);
};
 
VideoDeviceMonitorImpl::VideoDeviceMonitorImpl(VideoDeviceMonitor* monitor) {}
 
void
VideoDeviceMonitorImpl::start()
{}
 
VideoDeviceMonitorImpl::~VideoDeviceMonitorImpl() {}
 
VideoDeviceMonitor::VideoDeviceMonitor()
    : preferences_()
    , devices_()
    , monitorImpl_(new VideoDeviceMonitorImpl(this))
{}
 
VideoDeviceMonitor::~VideoDeviceMonitor() {}
 
} // namespace video
} // namespace jami