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veejay/veejay-current/veejay-server/libvje/effects/lumamask.c

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/*
* Linux VeeJay
*
* Copyright(C)2002 Niels Elburg <nwelburg@gmail.com>
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
*/
/*
this effect takes lumaninance information of frame B (0=no displacement,255=max displacement)
to extract distortion offsets for frame A.
h_scale and v_scale can be used to limit the scaling factor.
if the value is < 128, the pixels will be shifted to the left
otherwise to the right.
*/
#include <config.h>
#include <stdint.h>
#include <stdio.h>
#include <libvjmem/vjmem.h>
#include "lumamask.h"
#include "common.h"
static uint8_t *buf[4] = { NULL,NULL,NULL,NULL };
vj_effect *lumamask_init(int width, int height)
{
vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
ve->num_params = 4;
ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
ve->limits[0][0] = 1;
ve->limits[1][0] = width;
ve->limits[0][1] = 1;
ve->limits[1][1] = height;
ve->limits[0][2] = 0;
ve->limits[1][2] = 1;
ve->limits[0][3] = 0;
ve->limits[1][3] = 1;
ve->defaults[0] = width/20;
ve->defaults[1] = height/10;
ve->defaults[2] = 0; // border
ve->description = "Displacement Map";
ve->motion = 1;
ve->sub_format = 1;
ve->extra_frame = 1;
ve->has_user = 0;
ve->param_description = vje_build_param_list(ve->num_params, "X displacement", "Y displacement", "Mode", "Update Alpha" );
return ve;
}
static int n__ = 0;
static int N__ = 0;
int lumamask_malloc(int width, int height)
{
buf[0] = (uint8_t*)vj_malloc( sizeof(uint8_t) * width * height * 4);
if(!buf[0]) return 0;
veejay_memset( buf[0], 0, width * height );
buf[1] = buf[0] + (width *height);
veejay_memset( buf[1], 128, width * height );
buf[2] = buf[1] + (width *height);
veejay_memset( buf[2], 128, width * height );
buf[3] = buf[2] + (width *height);
veejay_memset( buf[3], 0, width * height );
n__ = 0;
N__ = 0;
return 1;
}
void lumamask_apply( VJFrame *frame, VJFrame *frame2, int width,
int height, int v_scale, int h_scale, int border, int alpha )
{
unsigned int x,y;
int dx,dy,nx,ny;
int tmp;
int interpolate = 1;
int tmp1 = v_scale;
int tmp2 = h_scale;
int motion = 0;
if( motionmap_active() )
{
motionmap_scale_to(width,height,1,1,&tmp1,&tmp2,&n__,&N__ );
motion = 1;
}
else
{
n__ = 0;
N__ = 0;
}
if( n__ == N__ || n__ == 0 )
interpolate = 0;
double w_ratio = (double) tmp1 / 128.0;
double h_ratio = (double) tmp2 / 128.0;
uint8_t *Y = frame->data[0];
uint8_t *Cb= frame->data[1];
uint8_t *Cr= frame->data[2];
uint8_t *Y2 = frame2->data[0];
uint8_t *Cb2 = frame2->data[1];
uint8_t *Cr2 = frame2->data[2];
uint8_t *aA = frame->data[3];
uint8_t *aB = frame2->data[3];
int strides[4] = { width * height, width * height, width * height ,( alpha ? width * height : 0 )};
vj_frame_copy( frame->data, buf, strides );
if( alpha == 0 )
{
if( border )
{
for(y=0; y < height; y++)
{
for(x=0; x < width ; x++)
{
// calculate new location of pixel
tmp = Y2[(y*width+x)] - 128;
// new x offset
dx = w_ratio * tmp;
// new y offset
dy = h_ratio * tmp;
// new pixel coordinates
nx = x + dx;
ny = y + dy;
if( nx < 0 || ny < 0 || nx >= width || ny >= height )
{
Y[y*width+x] = 16;
Cb[y*width+x] = 128;
Cr[y*width+x] = 128;
}
else
{
Y[y*width+x] = Y2[ny * width + nx];
Cb[y*width+x] = Cb2[ny * width + nx];
Cr[y*width+x] = Cr2[ny * width + nx];
}
}
}
}
else
{
for(y=0; y < height; y++)
{
for(x=0; x < width ; x++)
{
tmp = Y2[(y*width+x)] - 128;
dx = w_ratio * tmp;
dy = h_ratio * tmp;
nx = x + dx;
ny = y + dy;
while( nx < 0 )
nx += width;
while( ny < 0 )
ny += height;
if( nx < 0 || ny < 0 || nx >= width || ny >= height )
{
Y[y*width+x] = 16;
Cb[y*width+x] = 128;
Cr[y*width+x] = 128;
}
else
{
Y[y*width+x] = Y2[ny * width + nx];
Cb[y*width+x] = Cb2[ny * width + nx];
Cr[y*width+x] = Cr2[ny * width + nx];
}
}
}
}
}
else /* write alpha */
{
if( border )
{
for(y=0; y < height; y++)
{
for(x=0; x < width ; x++)
{
// calculate new location of pixel
tmp = Y2[(y*width+x)] - 128;
// new x offset
dx = w_ratio * tmp;
// new y offset
dy = h_ratio * tmp;
// new pixel coordinates
nx = x + dx;
ny = y + dy;
if( nx < 0 || ny < 0 || nx >= width || ny >= height )
{
Y[y*width+x] = 16;
Cb[y*width+x] = 128;
Cr[y*width+x] = 128;
aA[y*width+x] = 0;
}
else
{
Y[y*width+x] = Y2[ny * width + nx];
Cb[y*width+x] = Cb2[ny * width + nx];
Cr[y*width+x] = Cr2[ny * width + nx];
aA[y*width+x] = aB[ny * width + nx];
}
}
}
}
else
{
for(y=0; y < height; y++)
{
for(x=0; x < width ; x++)
{
tmp = Y2[(y*width+x)] - 128;
dx = w_ratio * tmp;
dy = h_ratio * tmp;
nx = x + dx;
ny = y + dy;
while( nx < 0 )
nx += width;
while( ny < 0 )
ny += height;
if( nx < 0 || ny < 0 || nx >= width || ny >= height )
{
Y[y*width+x] = 16;
Cb[y*width+x] = 128;
Cr[y*width+x] = 128;
aA[y*width+x] = 0;
}
else
{
Y[y*width+x] = Y2[ny * width + nx];
Cb[y*width+x] = Cb2[ny * width + nx];
Cr[y*width+x] = Cr2[ny * width + nx];
aA[y*width+x] = aB[ny*width+nx];
}
}
}
}
}
if( interpolate )
motionmap_interpolate_frame( frame, N__, n__ );
if( motion )
motionmap_store_frame( frame );
}
void lumamask_free()
{
if(buf[0]) free(buf[0]);
buf[0] = NULL;
buf[1] = NULL;
buf[2] = NULL;
buf[3] = NULL;
}
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