v4l2_modulator 1420 include/linux/videodev2.h #define VIDIOC_G_MODULATOR _IOWR('V', 54, struct v4l2_modulator) v4l2_modulator 1421 include/linux/videodev2.h #define VIDIOC_S_MODULATOR _IOW('V', 55, struct v4l2_modulator) v4l2_modulator 177 include/media/v4l2-ioctl.h struct v4l2_modulator *a); v4l2_modulator 179 include/media/v4l2-ioctl.h struct v4l2_modulator *a);