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/*
* BAYER2RGB24 ROUTINE TAKEN FROM:
*
* Sonix SN9C101 based webcam basic I/F routines
* Copyright (C) 2004 Takafumi Mizuno <taka-qce@ls-a.jp>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
void bayer2rgb24(unsigned char *dst, unsigned char *src, long int WIDTH, long int HEIGHT)
{
long int i;
unsigned char *rawpt, *scanpt;
long int size;
rawpt = src;
scanpt = dst;
size = WIDTH*HEIGHT;
for ( i = 0; i < size; i++ )
{
if ( (i/WIDTH) % 2 == 0 )
{
if ( (i % 2) == 0 )
{
// B
if ( (i > WIDTH) && ((i % WIDTH) > 0) )
{
*scanpt++ = (*(rawpt-WIDTH-1)+*(rawpt-WIDTH+1)+*(rawpt+WIDTH-1)+*(rawpt+WIDTH+1))/4; // R
*scanpt++ = (*(rawpt-1)+*(rawpt+1)+*(rawpt+WIDTH)+*(rawpt-WIDTH))/4; // G
*scanpt++ = *rawpt; // B
}
else
{
// first line or left column
*scanpt++ = *(rawpt+WIDTH+1); // R
*scanpt++ = (*(rawpt+1)+*(rawpt+WIDTH))/2; // G
*scanpt++ = *rawpt; // B
}
}
else
{
// (B)G
if ( (i > WIDTH) && ((i % WIDTH) < (WIDTH-1)) )
{
*scanpt++ = (*(rawpt+WIDTH)+*(rawpt-WIDTH))/2; // R
*scanpt++ = *rawpt; // G
*scanpt++ = (*(rawpt-1)+*(rawpt+1))/2; // B
}
else
{
// first line or right column
*scanpt++ = *(rawpt+WIDTH); // R
*scanpt++ = *rawpt; // G
*scanpt++ = *(rawpt-1); // B
}
}
}
else
{
if ( (i % 2) == 0 )
{
// G(R)
if ( (i < (WIDTH*(HEIGHT-1))) && ((i % WIDTH) > 0) )
{
*scanpt++ = (*(rawpt-1)+*(rawpt+1))/2; // R
*scanpt++ = *rawpt; // G
*scanpt++ = (*(rawpt+WIDTH)+*(rawpt-WIDTH))/2; // B
}
else
{
// bottom line or left column
*scanpt++ = *(rawpt+1); /* R */
*scanpt++ = *rawpt; /* G */
*scanpt++ = *(rawpt-WIDTH); /* B */
}
}
else
{
// R
if ( i < (WIDTH*(HEIGHT-1)) && ((i % WIDTH) < (WIDTH-1)) )
{
*scanpt++ = *rawpt; // R
*scanpt++ = (*(rawpt-1)+*(rawpt+1)+*(rawpt-WIDTH)+*(rawpt+WIDTH))/4; // G
*scanpt++ = (*(rawpt-WIDTH-1)+*(rawpt-WIDTH+1)+*(rawpt+WIDTH-1)+*(rawpt+WIDTH+1))/4; // B
}
else
{
// bottom line or right column
*scanpt++ = *rawpt; /* R */
*scanpt++ = (*(rawpt-1)+*(rawpt-WIDTH))/2; /* G */
*scanpt++ = *(rawpt-WIDTH-1); /* B */
}
}
}
rawpt++;
}
}
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