pdv_bayer_filter.c

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#include "edtinc.h"
#include "pdv_interlace_methods.h"

#include <math.h>


/*********************
* BAYER STRIPE ORDER (from upper left pixel)
* Letters define a box like:
*     Blue Green
*     Green Red  => PDV_BAYER_ORDER_BGGR
*
* Can be computed from the dd_p->kbs_red_row_first << 1
*                           | dd_p->kbs_green_pixel_first
*
*********************/

#define PDV_BAYER_ORDER_BGGR 0
#define PDV_BAYER_ORDER_GBRG 1
#define PDV_BAYER_ORDER_RGGB 2
#define PDV_BAYER_ORDER_GRBG 3

#define PDV_BAYER_ORDER(dd_p) ((((Dependent *) dd_p)->kbs_red_row_first << 1) \
    | ((Dependent *) dd_p)->kbs_green_pixel_first)


/********************************************
*
*
*
********************************************/



u_char * pdv_red_lut = NULL;
u_char * pdv_green_lut = NULL;
u_char * pdv_blue_lut = NULL;


#define USING_LUTS

#ifdef USING_LUTS

#define RED_LUT(x) pdv_red_lut[(x)]
#define GREEN_LUT(x) pdv_green_lut[(x)]
#define BLUE_LUT(x) pdv_blue_lut[(x)]

#else

#define RED_LUT(x) (u_char)(x)
#define GREEN_LUT(x) (u_char)(x)
#define BLUE_LUT(x) (u_char)(x)

#endif

int     bayer_current_base_size = 0;

double  default_rgb_scale[3] = {1.0, 1.0, 1.0};
double  bayer_rgb_scale[3] = {1.0, 1.0, 1.0};

double bayer_even_row_scale = 1.0, bayer_odd_row_scale = 1.0;

int bayer_red_first = 0;
int bayer_green_first = 0;

static void allocate_luts(int outsize)
                          

{
 
    /* assume luts are allocated */

    pdv_red_lut = edt_alloc(outsize);
    pdv_green_lut = edt_alloc(outsize);
    pdv_blue_lut = edt_alloc(outsize);

    bayer_current_base_size = outsize;


}

void get_bayer_luts(u_char **red, u_char **green, u_char **blue)

{
    
    if (!pdv_red_lut)
        allocate_luts(256);

    *red   = pdv_red_lut;
    *green = pdv_green_lut;
    *blue  = pdv_blue_lut;
}

u_char 
byte_gamma_function(double val, double scale, double gamma, int blackoffset)

{
    double  v = val;

    v -= blackoffset;

    if (v < 0)
        v = 0;

    v = 255 * pow((double) (scale * v) / 255.0, 1.0 / gamma);

    if (v > 255)
        v = 255;

    return (u_char) v;

}


void
set_bayer_parameters(int input_bits,
                     double rgb_scale[3],
                     double gamma,
                     int blackoffset,
                     int red_row_first,
                     int green_pixel_first)

{

    int     base_size = 256; /* for now, all bayer out is 888 */

    double  maxvalue;
    double  delta;
    double  val = 0;
    u_char  rval, gval, bval;
    int     i;

#ifndef USE_MMX

    base_size = 1 << input_bits;

#endif

    maxvalue = base_size;
    delta = (1.0 / maxvalue) * 256;

    bayer_red_first = red_row_first;
    bayer_green_first = green_pixel_first;

    if (gamma <= 0)
        gamma = 1.0;

    for (i = 0; i < 3; i++)
        bayer_rgb_scale[i] = rgb_scale[i];

    if (!pdv_red_lut)
        allocate_luts(base_size);

    for (i = 0; i < base_size; i++)
    {
        rval = byte_gamma_function(val, rgb_scale[0], gamma, blackoffset);
        gval = byte_gamma_function(val, rgb_scale[1], gamma, blackoffset);
        bval = byte_gamma_function(val, rgb_scale[2], gamma, blackoffset);

        pdv_red_lut[i] = rval;
        pdv_green_lut[i] = gval;
        pdv_blue_lut[i] = bval;

        val += delta;

    }


#ifdef USE_MMX

    if (bayer_can_use_mmx())
        set_bayer_parameters_mmx(input_bits,
        rgb_scale,
        gamma,
        blackoffset,
        red_row_first,
        green_pixel_first);

#endif

}

void
pdv_set_full_bayer_parameters(int nSourceDepth,
                              double scale[3],
                              double gamma,
                              int nBlackOffset,
                              int bRedRowFirst,
                              int bGreenPixelFirst,
                              int quality,
                              int bias,
                              int gradientcolor)

{
    set_bayer_parameters(nSourceDepth,
        scale,
        gamma,
        nBlackOffset,
        bRedRowFirst,
        bGreenPixelFirst);


#ifdef USE_MMX

    // not running on Linux yet
    set_bayer_quality(quality);
    set_bayer_gradient_color(gradientcolor);

    set_bayer_bias_value(bias);
#endif

}

void
set_bayer_even_odd_row_scale(double evenscale, double oddscale)

{
    bayer_even_row_scale = evenscale;
    bayer_odd_row_scale = oddscale;

}

void 
clear_bayer_parameters()

{

}



void
convert_red_row_16_green(u_short * lst_p,
                         u_short * cur_p,
                         u_short * nxt_p,
                         u_char * dest_p,
                         int width)

{
    u_short *end_p = cur_p + (width - 4);

    do
    {

        /* blue pixels */

        dest_p[0] = BLUE_LUT((lst_p[0] + nxt_p[0]) >> 1);
        dest_p[3] = BLUE_LUT((lst_p[0] + nxt_p[0] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[6] = BLUE_LUT((lst_p[2] + nxt_p[2]) >> 1);
        dest_p[9] = BLUE_LUT((lst_p[2] + nxt_p[2] + lst_p[4] + nxt_p[4]) >> 2);

        dest_p[1] = GREEN_LUT(cur_p[0]);
        dest_p[7] = GREEN_LUT(cur_p[2]);
        dest_p[4] = GREEN_LUT((cur_p[0] + cur_p[2] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[10] = GREEN_LUT((cur_p[2] + cur_p[4] + lst_p[3] + nxt_p[3]) >> 2);

        /* red pixels */

        dest_p[5] = RED_LUT(cur_p[1]);
        dest_p[11] = RED_LUT(cur_p[3]);
        dest_p[2] = RED_LUT((cur_p[-1] + cur_p[1]) >> 1);
        dest_p[8] = RED_LUT((cur_p[1] + cur_p[3]) >> 1);


        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    } while (cur_p < end_p);

}

void
convert_red_row_16(u_short * lst_p, u_short * cur_p, u_short * nxt_p,
                   u_char * dest_p, int width)

{
    int     x;

    for (x = 1; x < width - 4; x += 4)
    {

        dest_p[0] = BLUE_LUT((lst_p[-1] + nxt_p[-1] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[3] = BLUE_LUT((lst_p[1] + nxt_p[1]) >> 1);
        dest_p[6] = BLUE_LUT((lst_p[1] + nxt_p[1] + lst_p[3] + nxt_p[3]) >> 2);
        dest_p[9] = BLUE_LUT((lst_p[3] + nxt_p[3]) >> 1);

        dest_p[1] = GREEN_LUT((cur_p[-1] + cur_p[1] + lst_p[0] + nxt_p[0]) >> 2);
        dest_p[4] = GREEN_LUT(cur_p[1]);
        dest_p[7] = GREEN_LUT((cur_p[1] + cur_p[3] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[10] = GREEN_LUT(cur_p[3]);

        dest_p[2] = RED_LUT(cur_p[0]);
        dest_p[5] = RED_LUT((cur_p[0] + cur_p[2]) >> 1);
        dest_p[8] = RED_LUT(cur_p[2]);
        dest_p[11] = RED_LUT((cur_p[2] + cur_p[4]) >> 1);

        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    }


}


void
convert_blue_row_16_green(u_short * lst_p, u_short * cur_p, u_short * nxt_p,
                          u_char * dest_p, int width)

{
    int     x;

    for (x = 1; x < width - 4; x += 4)
    {

        dest_p[0] = BLUE_LUT((cur_p[-1] + cur_p[1]) >> 1);
        dest_p[3] = BLUE_LUT(cur_p[1]);
        dest_p[6] = BLUE_LUT((cur_p[1] + cur_p[3]) >> 1);
        dest_p[9] = BLUE_LUT(cur_p[3]);

        dest_p[1] = GREEN_LUT(cur_p[0]);
        dest_p[4] = GREEN_LUT((cur_p[0] + cur_p[2] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[7] = GREEN_LUT(cur_p[2]);
        dest_p[10] = GREEN_LUT((cur_p[2] + cur_p[4] + lst_p[3] + nxt_p[3]) >> 2);

        dest_p[2] = RED_LUT((lst_p[0] + nxt_p[0]) >> 1);
        dest_p[5] = RED_LUT((lst_p[0] + nxt_p[0] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[8] = RED_LUT((lst_p[2] + nxt_p[2]) >> 1);
        dest_p[11] = RED_LUT((lst_p[2] + nxt_p[2] + lst_p[4] + nxt_p[4]) >> 2);

        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    }

}



void
convert_blue_row_16(u_short * lst_p, u_short * cur_p, u_short * nxt_p,
                    u_char * dest_p, int width)

{
    int     x;

    for (x = 1; x < width - 4; x += 4)
    {

        dest_p[0] = BLUE_LUT(cur_p[0]);
        dest_p[3] = BLUE_LUT((cur_p[0] + cur_p[2]) >> 1);
        dest_p[9] = BLUE_LUT((cur_p[2] + cur_p[4]) >> 1);
        dest_p[6] = BLUE_LUT(cur_p[2]);
        dest_p[1] = GREEN_LUT((cur_p[-1] + cur_p[1] + lst_p[0] + nxt_p[0]) >> 2);
        dest_p[4] = GREEN_LUT(cur_p[1]);
        dest_p[7] = GREEN_LUT((cur_p[1] + cur_p[3] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[10] = GREEN_LUT(cur_p[3]);
        dest_p[2] = RED_LUT((lst_p[-1] + nxt_p[-1] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[5] = RED_LUT((lst_p[1] + nxt_p[1]) >> 1);
        dest_p[8] = RED_LUT((lst_p[1] + nxt_p[1] + lst_p[3] + nxt_p[3]) >> 2);
        dest_p[11] = RED_LUT((lst_p[3] + nxt_p[3]) >> 1);

        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    }

}


int
convert_bayer_image_16_BGR(u_short * src, 
                           int width, int rows, int pitch, 
                           u_char * dest, 
                           int order, int depth)


{
    u_short *cur_p;
    u_short *nxt_p;
    u_short *lst_p;

    u_char *dest_p = dest;

    u_char red_row;
    u_char green_start;

    u_char testgreen;

    int     y;

    if (depth == 8)
        return convert_bayer_image_8_BGR((u_char *) src,
            width,rows,pitch,dest, order);


#ifdef USE_MMX

    if (bayer_can_use_mmx())
    {
        return convert_bayer_image_BGR_mmx((u_char *) src, 
            width, rows, pitch, 
            dest, 0, order, depth);

    }

#endif


    if (order >= 0)
    {
        red_row = ((order & 2) != 0);
        green_start = ((order & 1) != 0);
    }
    else
    {
        red_row = bayer_red_first;
        green_start = bayer_green_first;

    }

    testgreen = green_start;

    if (bayer_current_base_size == 0)
    {

        set_bayer_parameters(depth,
            default_rgb_scale,
            1.0,
            0,
            red_row,
            green_start);

    }

    cur_p = src + pitch + 1;
    lst_p = src + 1;
    nxt_p = cur_p + pitch;

    green_start = !green_start;         

    if (green_start)
    {
        if (red_row)
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_blue_row_16(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_red_row_16_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;

            }
        }
        else
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_red_row_16(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_blue_row_16_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
            }
        }
    }
    else
    {
        if (red_row)
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_blue_row_16_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_red_row_16(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
            }
        }
        else
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_red_row_16_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_blue_row_16(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
            }

        }
    }

    return (0);
}



void
convert_red_row_8_green(u_char * lst_p,
                        u_char * cur_p,
                        u_char * nxt_p,
                        u_char * dest_p,
                        int width)

{
    u_char *end_p = cur_p + (width - 4);

    do
    {

        /* blue pixels */

        dest_p[0] = BLUE_LUT((lst_p[0] + nxt_p[0]) >> 1);
        dest_p[3] = BLUE_LUT((lst_p[0] + nxt_p[0] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[6] = BLUE_LUT((lst_p[2] + nxt_p[2]) >> 1);
        dest_p[9] = BLUE_LUT((lst_p[2] + nxt_p[2] + lst_p[4] + nxt_p[4]) >> 2);

        dest_p[1] = GREEN_LUT(cur_p[0]);
        dest_p[7] = GREEN_LUT(cur_p[2]);
        dest_p[4] = GREEN_LUT((cur_p[0] + cur_p[2] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[10] = GREEN_LUT((cur_p[2] + cur_p[4] + lst_p[3] + nxt_p[3]) >> 2);

        /* red pixels */

        dest_p[5] = RED_LUT(cur_p[1]);
        dest_p[11] = RED_LUT(cur_p[3]);
        dest_p[2] = RED_LUT((cur_p[-1] + cur_p[1]) >> 1);
        dest_p[8] = RED_LUT((cur_p[1] + cur_p[3]) >> 1);


        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    } while (cur_p < end_p);

}

void
convert_red_row_8(u_char * lst_p, u_char * cur_p, u_char * nxt_p,
                  u_char * dest_p, int width)

{
    int     x;

    for (x = 1; x < width - 4; x += 4)
    {

        dest_p[0] = BLUE_LUT((lst_p[-1] + nxt_p[-1] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[3] = BLUE_LUT((lst_p[1] + nxt_p[1]) >> 1);
        dest_p[6] = BLUE_LUT((lst_p[1] + nxt_p[1] + lst_p[3] + nxt_p[3]) >> 2);
        dest_p[9] = BLUE_LUT((lst_p[3] + nxt_p[3]) >> 1);

        dest_p[1] = GREEN_LUT((cur_p[-1] + cur_p[1] + lst_p[0] + nxt_p[0]) >> 2);
        dest_p[4] = GREEN_LUT(cur_p[1]);
        dest_p[7] = GREEN_LUT((cur_p[1] + cur_p[3] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[10] = GREEN_LUT(cur_p[3]);

        dest_p[2] = RED_LUT(cur_p[0]);
        dest_p[5] = RED_LUT((cur_p[0] + cur_p[2]) >> 1);
        dest_p[8] = RED_LUT(cur_p[2]);
        dest_p[11] = RED_LUT((cur_p[2] + cur_p[4]) >> 1);

        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    }


}


void
convert_blue_row_8_green(u_char * lst_p, u_char * cur_p, u_char * nxt_p,
                         u_char * dest_p, int width)

{
    int     x;

    for (x = 1; x < width - 4; x += 4)
    {

        dest_p[0] = BLUE_LUT((cur_p[-1] + cur_p[1]) >> 1);
        dest_p[3] = BLUE_LUT(cur_p[1]);
        dest_p[6] = BLUE_LUT((cur_p[1] + cur_p[3]) >> 1);
        dest_p[9] = BLUE_LUT(cur_p[3]);

        dest_p[1] = GREEN_LUT(cur_p[0]);
        dest_p[4] = GREEN_LUT((cur_p[0] + cur_p[2] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[7] = GREEN_LUT(cur_p[2]);
        dest_p[10] = GREEN_LUT((cur_p[2] + cur_p[4] + lst_p[3] + nxt_p[3]) >> 2);

        dest_p[2] = RED_LUT((lst_p[0] + nxt_p[0]) >> 1);
        dest_p[5] = RED_LUT((lst_p[0] + nxt_p[0] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[8] = RED_LUT((lst_p[2] + nxt_p[2]) >> 1);
        dest_p[11] = RED_LUT((lst_p[2] + nxt_p[2] + lst_p[4] + nxt_p[4]) >> 2);

        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    }

}



void
convert_blue_row_8(u_char * lst_p, u_char * cur_p, u_char * nxt_p,
                   u_char * dest_p, int width)

{
    int     x;

    for (x = 1; x < width - 4; x += 4)
    {

        dest_p[0] = BLUE_LUT(cur_p[0]);
        dest_p[3] = BLUE_LUT((cur_p[0] + cur_p[2]) >> 1);
        dest_p[9] = BLUE_LUT((cur_p[2] + cur_p[4]) >> 1);
        dest_p[6] = BLUE_LUT(cur_p[2]);
        dest_p[1] = GREEN_LUT((cur_p[-1] + cur_p[1] + lst_p[0] + nxt_p[0]) >> 2);
        dest_p[4] = GREEN_LUT(cur_p[1]);
        dest_p[7] = GREEN_LUT((cur_p[1] + cur_p[3] + lst_p[2] + nxt_p[2]) >> 2);
        dest_p[10] = GREEN_LUT(cur_p[3]);
        dest_p[2] = RED_LUT((lst_p[-1] + nxt_p[-1] + lst_p[1] + nxt_p[1]) >> 2);
        dest_p[5] = RED_LUT((lst_p[1] + nxt_p[1]) >> 1);
        dest_p[8] = RED_LUT((lst_p[1] + nxt_p[1] + lst_p[3] + nxt_p[3]) >> 2);
        dest_p[11] = RED_LUT((lst_p[3] + nxt_p[3]) >> 1);

        dest_p += 12;
        lst_p += 4;
        cur_p += 4;
        nxt_p += 4;

    }

}

int
convert_bayer_image_8_BGR(u_char * src, 
                          int width, int rows, int pitch, 
                          u_char * dest, 
                          int order)


{
    u_char *cur_p;
    u_char *nxt_p;
    u_char *lst_p;

    u_char *dest_p = dest;

    u_char red_row;
    u_char green_start;

    u_char testgreen;

    int     y;

#ifdef USE_MMX

    if (bayer_can_use_mmx())
    {
        return convert_bayer_image_BGR_mmx((u_char *) src, 
            width, rows, pitch, 
            dest, 0, order, 8);

    }

#endif

    if (order >= 0)
    {
        red_row = ((order & 2) != 0);
        green_start = ((order & 1) != 0);
    }
    else
    {
        red_row = bayer_red_first;
        green_start = bayer_green_first;

    }

    testgreen = green_start;

    if (bayer_current_base_size == 0)
    {

        set_bayer_parameters(8,
            default_rgb_scale,
            1.0,
            0,
            red_row,
            green_start);

    }


    cur_p = src + pitch + 1;
    lst_p = src + 1;
    nxt_p = cur_p + pitch;

    green_start = !green_start;         

    if (green_start)
    {
        if (red_row)
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_blue_row_8(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_red_row_8_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;

            }
        }
        else
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_red_row_8(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_blue_row_8_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
            }
        }
    }
    else
    {
        if (red_row)
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_blue_row_8_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_red_row_8(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
            }
        }
        else
        {
            for (y = 1; y < rows - 1; y += 2)
            {
                convert_red_row_8_green(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
                convert_blue_row_8(lst_p, cur_p, nxt_p, dest_p, width);
                lst_p += pitch;
                cur_p += pitch;
                nxt_p += pitch;
                dest_p += pitch*3;
            }

        }
    }


    return (0);
}

---