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BOOL PVideoInputDevice_V4L::SetContrast ( unsigned  newContrast ) [virtual]

Set contrast of the image. 0xffff-High contrast.

Reimplemented from PVideoDevice.

Definition at line 1563 of file vidinput_v4l.cxx.

References IsOpen().

  if (!IsOpen())
    return FALSE;

  struct video_picture vp;

  if (::ioctl(videoFd, VIDIOCGPICT, &vp) < 0)
    return FALSE;

  vp.contrast = newContrast;
  if (::ioctl(videoFd, VIDIOCSPICT, &vp) < 0)
    return FALSE;

  frameContrast = newContrast;
  return TRUE;

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