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144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
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/* linux/drivers/media/video/s5p-jpeg/jpeg-core.h
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* http://www.samsung.com
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*
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* Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef JPEG_CORE_H_
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#define JPEG_CORE_H_
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#include <media/v4l2-device.h>
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#define S5P_JPEG_M2M_NAME "s5p-jpeg"
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/* JPEG compression quality setting */
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#define S5P_JPEG_COMPR_QUAL_BEST 0
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#define S5P_JPEG_COMPR_QUAL_WORST 3
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/* JPEG RGB to YCbCr conversion matrix coefficients */
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#define S5P_JPEG_COEF11 0x4d
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#define S5P_JPEG_COEF12 0x97
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#define S5P_JPEG_COEF13 0x1e
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#define S5P_JPEG_COEF21 0x2c
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#define S5P_JPEG_COEF22 0x57
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#define S5P_JPEG_COEF23 0x83
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#define S5P_JPEG_COEF31 0x83
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#define S5P_JPEG_COEF32 0x6e
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#define S5P_JPEG_COEF33 0x13
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/* a selection of JPEG markers */
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#define TEM 0x01
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#define SOF0 0xc0
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#define RST 0xd0
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#define SOI 0xd8
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#define EOI 0xd9
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#define DHP 0xde
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/* Flags that indicate a format can be used for capture/output */
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#define MEM2MEM_CAPTURE (1 << 0)
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#define MEM2MEM_OUTPUT (1 << 1)
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/**
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* struct s5p_jpeg - JPEG IP abstraction
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* @lock: the mutex protecting this structure
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* @v4l2_dev: v4l2 device for mem2mem mode
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* @vfd_encoder: video device node for encoder mem2mem mode
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* @vfd_decoder: video device node for decoder mem2mem mode
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* @m2m_dev: v4l2 mem2mem device data
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* @ioarea: JPEG IP memory region
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* @regs: JPEG IP registers mapping
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* @irq: JPEG IP irq
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* @clk: JPEG IP clock
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* @dev: JPEG IP struct device
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* @alloc_ctx: videobuf2 memory allocator's context
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*/
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struct s5p_jpeg {
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struct mutex lock;
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struct v4l2_device v4l2_dev;
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struct video_device *vfd_encoder;
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struct video_device *vfd_decoder;
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struct v4l2_m2m_dev *m2m_dev;
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struct resource *ioarea;
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void __iomem *regs;
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unsigned int irq;
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struct clk *clk;
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struct device *dev;
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void *alloc_ctx;
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};
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/**
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* struct jpeg_fmt - driver's internal color format data
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* @name: format descritpion
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* @fourcc: the fourcc code, 0 if not applicable
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* @depth: number of bits per pixel
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* @colplanes: number of color planes (1 for packed formats)
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* @h_align: horizontal alignment order (align to 2^h_align)
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* @v_align: vertical alignment order (align to 2^v_align)
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* @types: types of queue this format is applicable to
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*/
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struct s5p_jpeg_fmt {
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char *name;
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u32 fourcc;
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int depth;
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int colplanes;
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int h_align;
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int v_align;
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u32 types;
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};
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/**
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* s5p_jpeg_q_data - parameters of one queue
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* @fmt: driver-specific format of this queue
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* @w: image width
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* @h: image height
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* @size: image buffer size in bytes
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*/
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struct s5p_jpeg_q_data {
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struct s5p_jpeg_fmt *fmt;
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u32 w;
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u32 h;
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u32 size;
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};
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/**
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* s5p_jpeg_ctx - the device context data
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* @jpeg: JPEG IP device for this context
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* @mode: compression (encode) operation or decompression (decode)
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* @compr_quality: destination image quality in compression (encode) mode
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* @m2m_ctx: mem2mem device context
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* @out_q: source (output) queue information
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* @cap_fmt: destination (capture) queue queue information
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* @hdr_parsed: set if header has been parsed during decompression
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*/
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struct s5p_jpeg_ctx {
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struct s5p_jpeg *jpeg;
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unsigned int mode;
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unsigned int compr_quality;
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struct v4l2_m2m_ctx *m2m_ctx;
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struct s5p_jpeg_q_data out_q;
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struct s5p_jpeg_q_data cap_q;
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bool hdr_parsed;
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};
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/**
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* s5p_jpeg_buffer - description of memory containing input JPEG data
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* @size: buffer size
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* @curr: current position in the buffer
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* @data: pointer to the data
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*/
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struct s5p_jpeg_buffer {
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unsigned long size;
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unsigned long curr;
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unsigned long data;
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};
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#endif /* JPEG_CORE_H */
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