mpromonet / libv4l2cpp

V4L2 C++ wrapper

libv4l2cpp

It is a C++ wrapper for V4L2

Dependencies

• liblog4cpp5-dev (optional)

V4L2 Capture

• create a V4L2 Capture interface using MMAP interface:

    V4L2DeviceParameters param("/dev/video0", V4L2_PIX_FMT_*, width, height, fps, IOTYPE_MMAP, verbose);
    V4l2Capture* videoCapture = V4l2Capture::create(param);
  

• data are available :

    timeval timeout; 
    bool isReadable = videoCapture->isReadable(&timeout);
  

• read data :

    size_t nb = videoCapture->read(buffer, bufferSize);
  

V4L2 Output

• To create a V4L2 Output interface using MMAP interface:

    V4L2DeviceParameters param("/dev/video0", V4L2_PIX_FMT_*, width, height, fps, IOTYPE_MMAP, verbose);
    V4l2Output* videoOutput = V4l2Output::create(param);
  

• data could be written :

    timeval timeout; 
    bool isWritable = videoOutput->isWritable(&timeout);
  

• write data :

    size_t nb = videoOutput->write(buffer, bufferSize);