jpeg-core.h

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/* linux/drivers/media/platform/s5p-jpeg/jpeg-core.h
 *
 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
 *      http://www.samsung.com
 *
 * Author: Andrzej Pietrasiewicz <[email protected]>
 *
 * 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 JPEG_CORE_H_
#define JPEG_CORE_H_

#include <media/v4l2-device.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-ctrls.h>

#define S5P_JPEG_M2M_NAME       "s5p-jpeg"

/* JPEG compression quality setting */
#define S5P_JPEG_COMPR_QUAL_BEST    0
#define S5P_JPEG_COMPR_QUAL_WORST   3

/* JPEG RGB to YCbCr conversion matrix coefficients */
#define S5P_JPEG_COEF11         0x4d
#define S5P_JPEG_COEF12         0x97
#define S5P_JPEG_COEF13         0x1e
#define S5P_JPEG_COEF21         0x2c
#define S5P_JPEG_COEF22         0x57
#define S5P_JPEG_COEF23         0x83
#define S5P_JPEG_COEF31         0x83
#define S5P_JPEG_COEF32         0x6e
#define S5P_JPEG_COEF33         0x13

/* a selection of JPEG markers */
#define TEM             0x01
#define SOF0                0xc0
#define RST             0xd0
#define SOI             0xd8
#define EOI             0xd9
#define DHP             0xde

/* Flags that indicate a format can be used for capture/output */
#define MEM2MEM_CAPTURE         (1 << 0)
#define MEM2MEM_OUTPUT          (1 << 1)

struct s5p_jpeg {
    struct mutex        lock;
    struct spinlock     slock;

    struct v4l2_device  v4l2_dev;
    struct video_device *vfd_encoder;
    struct video_device *vfd_decoder;
    struct v4l2_m2m_dev *m2m_dev;

    void __iomem        *regs;
    unsigned int        irq;
    struct clk      *clk;
    struct device       *dev;
    void            *alloc_ctx;
};

struct s5p_jpeg_fmt {
    char    *name;
    u32 fourcc;
    int depth;
    int colplanes;
    int h_align;
    int v_align;
    u32 types;
};

struct s5p_jpeg_q_data {
    struct s5p_jpeg_fmt *fmt;
    u32         w;
    u32         h;
    u32         size;
};

struct s5p_jpeg_ctx {
    struct s5p_jpeg     *jpeg;
    unsigned int        mode;
    unsigned short      compr_quality;
    unsigned short      restart_interval;
    unsigned short      subsampling;
    struct v4l2_m2m_ctx *m2m_ctx;
    struct s5p_jpeg_q_data  out_q;
    struct s5p_jpeg_q_data  cap_q;
    struct v4l2_fh      fh;
    bool            hdr_parsed;
    struct v4l2_ctrl_handler ctrl_handler;
};

struct s5p_jpeg_buffer {
    unsigned long size;
    unsigned long curr;
    unsigned long data;
};

#endif /* JPEG_CORE_H */