#include <linux/videodev2.h>

#include "Capture.h"
#include "MmapDevice.h"
#include "ReadWriteDevice.h"

namespace Video
{
namespace V4L2
{
Capture* Capture::create(const DeviceParameters& param)
{
    Capture* videoCapture = NULL;
    Device*  videoDevice  = NULL;
    int      caps         = V4L2_CAP_VIDEO_CAPTURE;
    switch (param.m_iotype)
    {
    case IOTYPE_MMAP:
        videoDevice = new MmapDevice(param, V4L2_BUF_TYPE_VIDEO_CAPTURE);
        caps |= V4L2_CAP_STREAMING;
        break;
    case IOTYPE_READWRITE:
        videoDevice = new ReadWriteDevice(param, V4L2_BUF_TYPE_VIDEO_CAPTURE);
        caps |= V4L2_CAP_READWRITE;
        break;
    }

    if (videoDevice && !videoDevice->init(caps))
    {
        delete videoDevice;
        videoDevice = NULL;
    }

    if (videoDevice)
    {
        videoCapture = new Capture(videoDevice);
    }
    return videoCapture;
}

Capture::Capture(Device* device): Access(device)
{
}

Capture::~Capture()
{
}

bool Capture::isReadable(timeval* tv)
{
    int    fd = m_device->getFd();
    fd_set fdset;
    FD_ZERO(&fdset);
    FD_SET(fd, &fdset);
    return (select(fd + 1, &fdset, NULL, NULL, tv) == 1);
}

size_t Capture::read(char* buffer, size_t bufferSize)
{
    return m_device->readInternal(buffer, bufferSize);
}
}
}