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/*
* Copyright (C) 2003 Mike Melanson
* Copyright (C) 2003 Dr. Tim Ferguson
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file roqvideo.c
* Id RoQ Video common functions based on work by Dr. Tim Ferguson
*/
#include "avcodec.h"
#include "roqvideo.h"
static inline void block_copy(unsigned char *out, unsigned char *in,
int outstride, int instride, int sz)
{
int rows = sz;
while(rows--) {
memcpy(out, in, sz);
out += outstride;
in += instride;
}
}
void ff_apply_vector_2x2(RoqContext *ri, int x, int y, roq_cell *cell)
{
unsigned char *bptr;
int boffs,stride;
stride = ri->y_stride;
boffs = (y * stride) + x;
bptr = ri->current_frame->data[0] + boffs;
bptr[0 ] = cell->y[0];
bptr[1 ] = cell->y[1];
bptr[stride ] = cell->y[2];
bptr[stride+1] = cell->y[3];
stride = ri->c_stride;
bptr = ri->current_frame->data[1] + boffs;
bptr[0 ] =
bptr[1 ] =
bptr[stride ] =
bptr[stride+1] = cell->u;
bptr = ri->current_frame->data[2] + boffs;
bptr[0 ] =
bptr[1 ] =
bptr[stride ] =
bptr[stride+1] = cell->v;
}
void ff_apply_vector_4x4(RoqContext *ri, int x, int y, roq_cell *cell)
{
unsigned char *bptr;
int boffs,stride;
stride = ri->y_stride;
boffs = (y * stride) + x;
bptr = ri->current_frame->data[0] + boffs;
bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] = cell->y[0];
bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] = cell->y[1];
bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] = cell->y[2];
bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->y[3];
stride = ri->c_stride;
bptr = ri->current_frame->data[1] + boffs;
bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] =
bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] =
bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] =
bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->u;
bptr = ri->current_frame->data[2] + boffs;
bptr[ 0] = bptr[ 1] = bptr[stride ] = bptr[stride +1] =
bptr[ 2] = bptr[ 3] = bptr[stride +2] = bptr[stride +3] =
bptr[stride*2 ] = bptr[stride*2+1] = bptr[stride*3 ] = bptr[stride*3+1] =
bptr[stride*2+2] = bptr[stride*2+3] = bptr[stride*3+2] = bptr[stride*3+3] = cell->v;
}
static inline void apply_motion_generic(RoqContext *ri, int x, int y, int deltax,
int deltay, int sz)
{
int mx, my, cp;
mx = x + deltax;
my = y + deltay;
/* check MV against frame boundaries */
if ((mx < 0) || (mx > ri->width - sz) ||
(my < 0) || (my > ri->height - sz)) {
av_log(ri->avctx, AV_LOG_ERROR, "motion vector out of bounds: MV = (%d, %d), boundaries = (0, 0, %d, %d)\n",
mx, my, ri->width, ri->height);
return;
}
for(cp = 0; cp < 3; cp++) {
int stride = ri->current_frame->linesize[cp];
block_copy(ri->current_frame->data[cp] + (y*stride) + x,
ri->last_frame->data[cp] + (my*stride) + mx,
stride, stride, sz);
}
}
void ff_apply_motion_4x4(RoqContext *ri, int x, int y,
int deltax, int deltay)
{
apply_motion_generic(ri, x, y, deltax, deltay, 4);
}
void ff_apply_motion_8x8(RoqContext *ri, int x, int y,
int deltax, int deltay)
{
apply_motion_generic(ri, x, y, deltax, deltay, 8);
}
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