drivers/media/video/s5p-jpeg/jpeg-core.h

   1 /* linux/drivers/media/video/s5p-jpeg/jpeg-core.h
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef JPEG_CORE_H_
  14 #define JPEG_CORE_H_
  15
  16 #include <media/v4l2-device.h>
  17
  18 #define S5P_JPEG_M2M_NAME               "s5p-jpeg"
  19
  20 /* JPEG compression quality setting */
  21 #define S5P_JPEG_COMPR_QUAL_BEST        0
  22 #define S5P_JPEG_COMPR_QUAL_WORST       3
  23
  24 /* JPEG RGB to YCbCr conversion matrix coefficients */
  25 #define S5P_JPEG_COEF11                 0x4d
  26 #define S5P_JPEG_COEF12                 0x97
  27 #define S5P_JPEG_COEF13                 0x1e
  28 #define S5P_JPEG_COEF21                 0x2c
  29 #define S5P_JPEG_COEF22                 0x57
  30 #define S5P_JPEG_COEF23                 0x83
  31 #define S5P_JPEG_COEF31                 0x83
  32 #define S5P_JPEG_COEF32                 0x6e
  33 #define S5P_JPEG_COEF33                 0x13
  34
  35 /* a selection of JPEG markers */
  36 #define TEM                             0x01
  37 #define SOF0                            0xc0
  38 #define RST                             0xd0
  39 #define SOI                             0xd8
  40 #define EOI                             0xd9
  41 #define DHP                             0xde
  42
  43 /* Flags that indicate a format can be used for capture/output */
  44 #define MEM2MEM_CAPTURE                 (1 << 0)
  45 #define MEM2MEM_OUTPUT                  (1 << 1)
  46
  47 /**
  48  * struct s5p_jpeg - JPEG IP abstraction
  49  * @lock:               the mutex protecting this structure
  50  * @v4l2_dev:           v4l2 device for mem2mem mode
  51  * @vfd_encoder:        video device node for encoder mem2mem mode
  52  * @vfd_decoder:        video device node for decoder mem2mem mode
  53  * @m2m_dev:            v4l2 mem2mem device data
  54  * @ioarea:             JPEG IP memory region
  55  * @regs:               JPEG IP registers mapping
  56  * @irq:                JPEG IP irq
  57  * @clk:                JPEG IP clock
  58  * @dev:                JPEG IP struct device
  59  * @alloc_ctx:          videobuf2 memory allocator's context
  60  */
  61 struct s5p_jpeg {
  62         struct mutex            lock;
  63
  64         struct v4l2_device      v4l2_dev;
  65         struct video_device     *vfd_encoder;
  66         struct video_device     *vfd_decoder;
  67         struct v4l2_m2m_dev     *m2m_dev;
  68
  69         struct resource         *ioarea;
  70         void __iomem            *regs;
  71         unsigned int            irq;
  72         struct clk              *clk;
  73         struct device           *dev;
  74         void                    *alloc_ctx;
  75 };
  76
  77 /**
  78  * struct jpeg_fmt - driver's internal color format data
  79  * @name:       format descritpion
  80  * @fourcc:     the fourcc code, 0 if not applicable
  81  * @depth:      number of bits per pixel
  82  * @colplanes:  number of color planes (1 for packed formats)
  83  * @h_align:    horizontal alignment order (align to 2^h_align)
  84  * @v_align:    vertical alignment order (align to 2^v_align)
  85  * @types:      types of queue this format is applicable to
  86  */
  87 struct s5p_jpeg_fmt {
  88         char    *name;
  89         u32     fourcc;
  90         int     depth;
  91         int     colplanes;
  92         int     h_align;
  93         int     v_align;
  94         u32     types;
  95 };
  96
  97 /**
  98  * s5p_jpeg_q_data - parameters of one queue
  99  * @fmt:        driver-specific format of this queue
 100  * @w:          image width
 101  * @h:          image height
 102  * @size:       image buffer size in bytes
 103  */
 104 struct s5p_jpeg_q_data {
 105         struct s5p_jpeg_fmt     *fmt;
 106         u32                     w;
 107         u32                     h;
 108         u32                     size;
 109 };
 110
 111 /**
 112  * s5p_jpeg_ctx - the device context data
 113  * @jpeg:               JPEG IP device for this context
 114  * @mode:               compression (encode) operation or decompression (decode)
 115  * @compr_quality:      destination image quality in compression (encode) mode
 116  * @m2m_ctx:            mem2mem device context
 117  * @out_q:              source (output) queue information
 118  * @cap_fmt:            destination (capture) queue queue information
 119  * @hdr_parsed:         set if header has been parsed during decompression
 120  */
 121 struct s5p_jpeg_ctx {
 122         struct s5p_jpeg         *jpeg;
 123         unsigned int            mode;
 124         unsigned int            compr_quality;
 125         struct v4l2_m2m_ctx     *m2m_ctx;
 126         struct s5p_jpeg_q_data  out_q;
 127         struct s5p_jpeg_q_data  cap_q;
 128         bool                    hdr_parsed;
 129 };
 130
 131 /**
 132  * s5p_jpeg_buffer - description of memory containing input JPEG data
 133  * @size:       buffer size
 134  * @curr:       current position in the buffer
 135  * @data:       pointer to the data
 136  */
 137 struct s5p_jpeg_buffer {
 138         unsigned long size;
 139         unsigned long curr;
 140         unsigned long data;
 141 };
 142
 143 #endif /* JPEG_CORE_H */