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README.md

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) == 1);
  • 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) == 1);
  • write data :

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

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