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/*
# (C) 2008 Hans de Goede <j.w.r.degoede@hhs.nl>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "libv4lconvert-priv.h"
void v4lconvert_spca501_to_yuv420(const unsigned char *src, unsigned char *dst,
int width, int height)
{
int i,j;
for (i = 0; i < height; i += 2) {
unsigned long *lsrc = (unsigned long *)(src + (i / 2) * 3 * width);
/* -128 - 127 --> 0 - 255 and copy first line Y */
unsigned long *ldst = (unsigned long *)(dst + i * width);
for (j = 0; j < width; j += sizeof(long)) {
*ldst = *lsrc++;
*ldst++ ^= 0x8080808080808080ULL;
}
/* -128 - 127 --> 0 - 255 and copy 1 line U */
ldst = (unsigned long *)(dst + width * height + i * width / 4);
for (j = 0; j < width/2; j += sizeof(long)) {
*ldst = *lsrc++;
*ldst++ ^= 0x8080808080808080ULL;
}
/* -128 - 127 --> 0 - 255 and copy second line Y */
ldst = (unsigned long *)(dst + i * width + width);
for (j = 0; j < width; j += sizeof(long)) {
*ldst = *lsrc++;
*ldst++ ^= 0x8080808080808080ULL;
}
/* -128 - 127 --> 0 - 255 and copy 1 line V */
ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
for (j = 0; j < width/2; j += sizeof(long)) {
*ldst = *lsrc++;
*ldst++ ^= 0x8080808080808080ULL;
}
}
}
/* IMPROVEME (maybe?) make this convert in one go?? */
void v4lconvert_spca501_to_bgr24(const unsigned char *src, unsigned char *dst,
int width, int height)
{
unsigned char buf[(width * height * 6) / 4];
v4lconvert_spca501_to_yuv420(src, buf, width, height);
v4lconvert_yuv420_to_bgr24(buf, dst, width, height);
}
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