1. 根目录:
2. drivers
3. media
4. platform
5. omap3isp
6. ispresizer.h

/*
 * ispresizer.h
 *
 * TI OMAP3 ISP - Resizer module
 *
 * Copyright (C) 2010 Nokia Corporation
 * Copyright (C) 2009 Texas Instruments, Inc
 *
 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *	     Sakari Ailus <sakari.ailus@iki.fi>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef OMAP3_ISP_RESIZER_H
#define OMAP3_ISP_RESIZER_H

#include <linux/spinlock.h>
#include <linux/types.h>

/*
 * Constants for filter coefficients count
 */
#define COEFF_CNT		32

/*
 * struct isprsz_coef - Structure for resizer filter coefficients.
 * @h_filter_coef_4tap: Horizontal filter coefficients for 8-phase/4-tap
 *			mode (.5x-4x)
 * @v_filter_coef_4tap: Vertical filter coefficients for 8-phase/4-tap
 *			mode (.5x-4x)
 * @h_filter_coef_7tap: Horizontal filter coefficients for 4-phase/7-tap
 *			mode (.25x-.5x)
 * @v_filter_coef_7tap: Vertical filter coefficients for 4-phase/7-tap
 *			mode (.25x-.5x)
 */
struct isprsz_coef {
	u16 h_filter_coef_4tap[32];
	u16 v_filter_coef_4tap[32];
	/* Every 8th value is a dummy value in the following arrays: */
	u16 h_filter_coef_7tap[32];
	u16 v_filter_coef_7tap[32];
};

/* Chrominance horizontal algorithm */
enum resizer_chroma_algo {
	RSZ_THE_SAME = 0,	/* Chrominance the same as Luminance */
	RSZ_BILINEAR = 1,	/* Chrominance uses bilinear interpolation */
};

/* Resizer input type select */
enum resizer_colors_type {
	RSZ_YUV422 = 0,		/* YUV422 color is interleaved */
	RSZ_COLOR8 = 1,		/* Color separate data on 8 bits */
};

/*
 * Structure for horizontal and vertical resizing value
 */
struct resizer_ratio {
	u32 horz;
	u32 vert;
};

/*
 * Structure for luminance enhancer parameters.
 */
struct resizer_luma_yenh {
	u8 algo;		/* algorithm select. */
	u8 gain;		/* maximum gain. */
	u8 slope;		/* slope. */
	u8 core;		/* core offset. */
};

enum resizer_input_entity {
	RESIZER_INPUT_NONE,
	RESIZER_INPUT_VP,	/* input video port - prev or ccdc */
	RESIZER_INPUT_MEMORY,
};

/* Sink and source resizer pads */
#define RESZ_PAD_SINK			0
#define RESZ_PAD_SOURCE			1
#define RESZ_PADS_NUM			2

/*
 * struct isp_res_device - OMAP3 ISP resizer module
 * @lock: Protects formats and crop rectangles between set_selection and IRQ
 * @crop.request: Crop rectangle requested by the user
 * @crop.active: Active crop rectangle (based on hardware requirements)
 */
struct isp_res_device {
	struct v4l2_subdev subdev;
	struct media_pad pads[RESZ_PADS_NUM];
	struct v4l2_mbus_framefmt formats[RESZ_PADS_NUM];

	enum resizer_input_entity input;
	struct isp_video video_in;
	struct isp_video video_out;

	u32 addr_base;   /* stored source buffer address in memory mode */
	u32 crop_offset; /* additional offset for crop in memory mode */
	struct resizer_ratio ratio;
	int pm_state;
	unsigned int applycrop:1;
	enum isp_pipeline_stream_state state;
	wait_queue_head_t wait;
	atomic_t stopping;
	spinlock_t lock;

	struct {
		struct v4l2_rect request;
		struct v4l2_rect active;
	} crop;
};

struct isp_device;

int omap3isp_resizer_init(struct isp_device *isp);
void omap3isp_resizer_cleanup(struct isp_device *isp);

int omap3isp_resizer_register_entities(struct isp_res_device *res,
				       struct v4l2_device *vdev);
void omap3isp_resizer_unregister_entities(struct isp_res_device *res);
void omap3isp_resizer_isr_frame_sync(struct isp_res_device *res);
void omap3isp_resizer_isr(struct isp_res_device *isp_res);

void omap3isp_resizer_max_rate(struct isp_res_device *res,
			       unsigned int *max_rate);

void omap3isp_resizer_suspend(struct isp_res_device *isp_res);

void omap3isp_resizer_resume(struct isp_res_device *isp_res);

int omap3isp_resizer_busy(struct isp_res_device *isp_res);

#endif	/* OMAP3_ISP_RESIZER_H */