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#include "qgstreamervideoinputdevicecontrol.h"

#include <QtGui/QIcon>

#include <QtCore/QDir>

#include <QtCore/QDebug>

#include <linux/types.h>

#include <sys/time.h>

#include <sys/ioctl.h>

#include <sys/poll.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

#include <string.h>

#include <stdlib.h>

#include <sys/mman.h>

#include <linux/videodev2.h>

QGstreamerVideoInputDeviceControl::QGstreamerVideoInputDeviceControl(QObject *parent)

    :QVideoDeviceControl(parent), m_selectedDevice(0)

{

    update();

}

QGstreamerVideoInputDeviceControl::~QGstreamerVideoInputDeviceControl()

{

}

int QGstreamerVideoInputDeviceControl::deviceCount() const

{

    return m_names.size();

}

QString QGstreamerVideoInputDeviceControl::deviceName(int index) const

{

    return m_names[index];

}

QString QGstreamerVideoInputDeviceControl::deviceDescription(int index) const

{

    return m_descriptions[index];

}

QIcon QGstreamerVideoInputDeviceControl::deviceIcon(int index) const

{

    Q_UNUSED(index);

    return QIcon();

}

int QGstreamerVideoInputDeviceControl::defaultDevice() const

{

    return 0;

}

int QGstreamerVideoInputDeviceControl::selectedDevice() const

{

    return m_selectedDevice;

}

void QGstreamerVideoInputDeviceControl::setSelectedDevice(int index)

{

    if (index != m_selectedDevice) {

        m_selectedDevice = index;

        emit selectedDeviceChanged(index);

        emit selectedDeviceChanged(deviceName(index));

    }

}

void QGstreamerVideoInputDeviceControl::update()

{

    m_names.clear();

    m_descriptions.clear();

    QDir devDir("/dev");

    devDir.setFilter(QDir::System);

    QFileInfoList entries = devDir.entryInfoList(QStringList() << "video*");

    foreach( const QFileInfo &entryInfo, entries ) {

        //qDebug() << "Try" << entryInfo.filePath();

        int fd = ::open(entryInfo.filePath().toLatin1().constData(), O_RDWR );

        if (fd == -1)

            continue;

        bool isCamera = false;

        v4l2_input input;

        memset(&input, 0, sizeof(input));

        for (; ::ioctl(fd, VIDIOC_ENUMINPUT, &input) >= 0; ++input.index) {

            if(input.type == V4L2_INPUT_TYPE_CAMERA || input.type == 0) {

                isCamera = ::ioctl(fd, VIDIOC_S_INPUT, input.index) != 0;

                break;

            }

        }

        if (isCamera) {

            // find out its driver "name"

            QString name;

            struct v4l2_capability vcap;

            memset(&vcap, 0, sizeof(struct v4l2_capability));

            if (ioctl(fd, VIDIOC_QUERYCAP, &vcap) != 0)

                name = entryInfo.fileName();

            else

                name = QString((const char*)vcap.card);

            //qDebug() << "found camera: " << name;

            m_names.append(entryInfo.filePath());

            m_descriptions.append(name);

        }

        ::close(fd);

    }

}