/**************************************************************************
*
* XVID MPEG-4 VIDEO CODEC
* 8bit16bit transfer
*
* This program is an implementation of a part of one or more MPEG-4
* Video tools as specified in ISO/IEC 14496-2 standard. Those intending
* to use this software module in hardware or software products are
* advised that its use may infringe existing patents or copyrights, and
* any such use would be at such party's own risk. The original
* developer of this software module and his/her company, and subsequent
* editors and their companies, will have no liability for use of this
* software or modifications or derivatives thereof.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*************************************************************************/
/**************************************************************************
*
* History:
*
* 07.01.2002 merge functions from compensate; rename functions
* 22.12.2001 transfer_8to8add16 limit fix
* 07.11.2001 initial version; (c)2001 peter ross
*
*************************************************************************/
#include "../global.h"
#include "mem_transfer.h"
// function pointers
TRANSFER_8TO16COPY_PTR transfer_8to16copy;
TRANSFER_16TO8COPY_PTR transfer_16to8copy;
TRANSFER_8TO16SUB_PTR transfer_8to16sub;
TRANSFER_16TO8ADD_PTR transfer_16to8add;
TRANSFER8X8_COPY_PTR transfer8x8_copy;
void transfer_8to16copy_c(int16_t * const dst,
const uint8_t * const src,
uint32_t stride)
{
uint32_t i, j;
for (j = 0; j < 8; j++) {
for (i = 0; i < 8; i++) {
dst[j * 8 + i] = (int16_t)src[j * stride + i];
}
}
}
void transfer_16to8copy_c(uint8_t * const dst,
const int16_t * const src,
uint32_t stride)
{
uint32_t i, j;
for (j = 0; j < 8; j++) {
for (i = 0; i < 8; i++) {
int16_t pixel = src[j * 8 + i];
if (pixel < 0) {
pixel = 0;
} else if (pixel > 255) {
pixel = 255;
}
dst[j * stride + i] = (uint8_t)pixel;
}
}
}
/*
perform motion compensation (and 8bit->16bit dct transfer)
*/
void transfer_8to16sub_c(int16_t * const dct,
uint8_t * const cur,
const uint8_t * ref,
const uint32_t stride)
{
uint32_t i, j;
for (j = 0; j < 8; j++)
{
for (i = 0; i < 8; i++)
{
uint8_t c = cur[j * stride + i];
uint8_t r = ref[j * stride + i];
cur[j * stride + i] = r;
dct[j * 8 + i] = (int16_t)c - (int16_t)r;
}
}
}
void transfer_16to8add_c(uint8_t * const dst,
const int16_t * const src,
uint32_t stride)
{
uint32_t i, j;
for (j = 0; j < 8; j++) {
for (i = 0; i < 8; i++) {
int16_t pixel = (int16_t)dst[j * stride + i] + src[j * 8 + i];
if (pixel < 0) {
pixel = 0;
} else if (pixel > 255) {
pixel = 255;
}
dst[j * stride + i] = (uint8_t)pixel;
}
}
}
void transfer8x8_copy_c(uint8_t * const dst,
const uint8_t * const src,
const uint32_t stride)
{
uint32_t i, j;
for (j = 0; j < 8; j++) {
for (i = 0; i < 8; i++) {
dst[j * stride + i] = src[j * stride + i];
}
}
}
