v4l2_enumfrmfmt.h.svn-base

linux video4Linux 驱动

#ifndef __V4L2_ENUMFRMFMT_H
#define __V4L2_ENUMFRMFMT_H

/*
 * Enums
 */

enum v4l2_frmsizetypes {
	V4L2_FRMSIZE_TYPE_DISCRETE		= 1,
	V4L2_FRMSIZE_TYPE_CONTINUOUS,
	V4L2_FRMSIZE_TYPE_STEPWISE,
};

enum v4l2_frmivaltypes {
	V4L2_FRMIVAL_TYPE_DISCRETE		= 1,
	V4L2_FRMIVAL_TYPE_CONTINUOUS,
	V4L2_FRMIVAL_TYPE_STEPWISE,
};

/*
 * Structs
 */

struct v4l2_frmsize_discrete {
	/* Width of the frame [pixel] */
	__u32		width;

	/* Height of the frame [pixel] */
	__u32		height;
};

struct v4l2_frmsize_stepwise {
	/* Minimum frame width [pixel] */
	__u32		min_width;

	/* Maximum frame width [pixel] */
	__u32		max_width;

	/* Frame width step size [pixel] */
	__u32		step_width;

	/* Minimum frame height [pixel] */
	__u32		min_height;

	/* Maximum frame height [pixel] */
	__u32		max_height;

	/* Frame height step size [pixel] */
	__u32		step_height;
};

struct v4l2_frmsizeenum {
	/* IN: Index of the given frame size in the enumeration. */
	__u32		index;

	/* IN: Pixel format for which the frame sizes are enumerated. */
	__u32		pixel_format;

	/* OUT: Frame size type the device supports. */
	__u32		type;

	/* OUT: Frame size with the given index */
	union {
		struct v4l2_frmsize_discrete	discrete;

		struct v4l2_frmsize_stepwise	stepwise;
	};

	/* Reserved space for future use */
	__u32	reserved[2];
};

struct v4l2_frmival_stepwise {
	/* Minimum frame interval [s] */
	struct v4l2_fract		min;

	/* Maximum frame interval [s] */
	struct v4l2_fract		max;

	/* Frame interval step size [s] */
	struct v4l2_fract		step;
};

struct v4l2_frmivalenum {
	/* IN: Index of the given frame interval in the enumeration. */
	__u32			index;

	/* IN: Pixel format for which the frame intervals are enumerated. */
	__u32			pixel_format;

	/* IN: Frame width for which the frame intervals are enumerated. */
	__u32			width;

	/* IN: Frame height for which the frame intervals are enumerated. */
	__u32			height;

	/* OUT: Frame interval type the device supports. */
	__u32			type;

	/* OUT: Frame interval with the given index. */
	union {
		/* Frame interval [s] */
		struct v4l2_fract			discrete;

		struct v4l2_frmival_stepwise		stepwise;
	};

	/* Reserved space for future use */
	__u32	reserved[2];
};

/*
 * Ioctls
 */

#define VIDIOC_ENUM_FRAMESIZES		_IOWR ('V', BASE_VIDIOC_PRIVATE + 52, struct v4l2_frmsizeenum)
#define VIDIOC_ENUM_FRAMEINTERVALS	_IOWR ('V', BASE_VIDIOC_PRIVATE + 53, struct v4l2_frmivalenum)

#endif /* __V4L2_ENUMFRMFMT_H */