- 根目录:
- drivers
- media
- video
- s5p-jpeg
- jpeg-core.h
/* linux/drivers/media/video/s5p-jpeg/jpeg-core.h
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
*
* 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 - JPEG IP abstraction
* @lock: the mutex protecting this structure
* @slock: spinlock protecting the device contexts
* @v4l2_dev: v4l2 device for mem2mem mode
* @vfd_encoder: video device node for encoder mem2mem mode
* @vfd_decoder: video device node for decoder mem2mem mode
* @m2m_dev: v4l2 mem2mem device data
* @ioarea: JPEG IP memory region
* @regs: JPEG IP registers mapping
* @irq: JPEG IP irq
* @clk: JPEG IP clock
* @dev: JPEG IP struct device
* @alloc_ctx: videobuf2 memory allocator's context
*/
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;
struct resource *ioarea;
void __iomem *regs;
unsigned int irq;
struct clk *clk;
struct device *dev;
void *alloc_ctx;
};
/**
* struct jpeg_fmt - driver's internal color format data
* @name: format descritpion
* @fourcc: the fourcc code, 0 if not applicable
* @depth: number of bits per pixel
* @colplanes: number of color planes (1 for packed formats)
* @h_align: horizontal alignment order (align to 2^h_align)
* @v_align: vertical alignment order (align to 2^v_align)
* @types: types of queue this format is applicable to
*/
struct s5p_jpeg_fmt {
char *name;
u32 fourcc;
int depth;
int colplanes;
int h_align;
int v_align;
u32 types;
};
/**
* s5p_jpeg_q_data - parameters of one queue
* @fmt: driver-specific format of this queue
* @w: image width
* @h: image height
* @size: image buffer size in bytes
*/
struct s5p_jpeg_q_data {
struct s5p_jpeg_fmt *fmt;
u32 w;
u32 h;
u32 size;
};
/**
* s5p_jpeg_ctx - the device context data
* @jpeg: JPEG IP device for this context
* @mode: compression (encode) operation or decompression (decode)
* @compr_quality: destination image quality in compression (encode) mode
* @m2m_ctx: mem2mem device context
* @out_q: source (output) queue information
* @cap_fmt: destination (capture) queue queue information
* @hdr_parsed: set if header has been parsed during decompression
* @ctrl_handler: controls handler
*/
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;
};
/**
* s5p_jpeg_buffer - description of memory containing input JPEG data
* @size: buffer size
* @curr: current position in the buffer
* @data: pointer to the data
*/
struct s5p_jpeg_buffer {
unsigned long size;
unsigned long curr;
unsigned long data;
};
#endif /* JPEG_CORE_H */