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/*
# (C) 2008 Hans de Goede <hdegoede@redhat.com>
# 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 Lesser 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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
*/
#include <string.h>
#include "libv4lconvert-priv.h"
/* YUYV per line */
void v4lconvert_spca501_to_yuv420(const unsigned char *src, unsigned char *dst,
int width, int height, int yvu)
{
int i, j;
unsigned long *lsrc = (unsigned long *)src;
for (i = 0; i < height; i += 2) {
/* -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 */
if (yvu)
ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
else
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 */
if (yvu)
ldst = (unsigned long *)(dst + width * height + i * width / 4);
else
ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
for (j = 0; j < width/2; j += sizeof(long)) {
*ldst = *lsrc++;
*ldst++ ^= 0x8080808080808080ULL;
}
}
}
/* YYUV per line */
void v4lconvert_spca505_to_yuv420(const unsigned char *src, unsigned char *dst,
int width, int height, int yvu)
{
int i, j;
unsigned long *lsrc = (unsigned long *)src;
for (i = 0; i < height; i += 2) {
/* -128 - 127 --> 0 - 255 and copy 2 lines of Y */
unsigned long *ldst = (unsigned long *)(dst + i * width);
for (j = 0; j < width*2; j += sizeof(long)) {
*ldst = *lsrc++;
*ldst++ ^= 0x8080808080808080ULL;
}
/* -128 - 127 --> 0 - 255 and copy 1 line U */
if (yvu)
ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
else
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 1 line V */
if (yvu)
ldst = (unsigned long *)(dst + width * height + i * width / 4);
else
ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
for (j = 0; j < width/2; j += sizeof(long)) {
*ldst = *lsrc++;
*ldst++ ^= 0x8080808080808080ULL;
}
}
}
/* YUVY per line */
void v4lconvert_spca508_to_yuv420(const unsigned char *src, unsigned char *dst,
int width, int height, int yvu)
{
int i, j;
unsigned long *lsrc = (unsigned long *)src;
for (i = 0; i < height; i += 2) {
/* -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 */
if (yvu)
ldst = (unsigned long *)(dst + (width * height * 5) / 4 + i * width / 4);
else
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 1 line V */
if (yvu)
ldst = (unsigned long *)(dst + width * height + i * width / 4);
else
ldst = (unsigned long *)(dst + (width * height * 5) / 4 + 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;
}
}
}
/* Note this is not a spca specific format, bit it fits in this file in that
it is another funny yuv format */
/* one line of Y then 1 line of VYUY */
void v4lconvert_cit_yyvyuy_to_yuv420(const unsigned char *src,
unsigned char *ydest,
int width, int height, int yvu)
{
int x, y;
unsigned char *udest, *vdest;
if (yvu) {
vdest = ydest + width * height;
udest = vdest + (width * height) / 4;
} else {
udest = ydest + width * height;
vdest = udest + (width * height) / 4;
}
for (y = 0; y < height; y += 2) {
/* copy 1 line of Y */
memcpy(ydest, src, width);
src += width;
ydest += width;
/* Split one line of VYUY */
for (x = 0; x < width; x += 2) {
*vdest++ = *src++;
*ydest++ = *src++;
*udest++ = *src++;
*ydest++ = *src++;
}
}
}
/* Note this is not a spca specific format, but it fits in this file in that
it is another funny yuv format */
/* The konica gspca subdriver using cams send data in blocks of 256 pixels
in YUV420 format. */
void v4lconvert_konica_yuv420_to_yuv420(const unsigned char *src,
unsigned char *ydest,
int width, int height, int yvu)
{
int i, no_blocks;
unsigned char *udest, *vdest;
if (yvu) {
vdest = ydest + width * height;
udest = vdest + (width * height) / 4;
} else {
udest = ydest + width * height;
vdest = udest + (width * height) / 4;
}
no_blocks = width * height / 256;
for (i = 0; i < no_blocks; i++) {
/* copy 256 Y pixels */
memcpy(ydest, src, 256);
src += 256;
ydest += 256;
/* copy 64 U pixels */
memcpy(udest, src, 64);
src += 64;
udest += 64;
/* copy 64 V pixels */
memcpy(vdest, src, 64);
src += 64;
vdest += 64;
}
}
/* And another not a spca specific format, but fitting in this file in that
it is another funny yuv format */
/* Two lines of Y then 1 line of UV */
void v4lconvert_m420_to_yuv420(const unsigned char *src,
unsigned char *ydest,
int width, int height, int yvu)
{
int x, y;
unsigned char *udest, *vdest;
if (yvu) {
vdest = ydest + width * height;
udest = vdest + (width * height) / 4;
} else {
udest = ydest + width * height;
vdest = udest + (width * height) / 4;
}
for (y = 0; y < height; y += 2) {
/* copy 2 lines of Y */
memcpy(ydest, src, 2 * width);
src += 2 * width;
ydest += 2 * width;
/* Split one line of UV */
for (x = 0; x < width; x += 2) {
*udest++ = *src++;
*vdest++ = *src++;
}
}
}
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