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veejay/veejay-2005/libvje/effects/chromamagick.c
Niels Elburg c84f6ca821 moved veejay-current to veejay-2005 (branch closed) 
git-svn-id: svn://code.dyne.org/veejay/trunk@509 eb8d1916-c9e9-0310-b8de-cf0c9472ead5
2006-01-20 16:43:25 +00:00

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/*
* VeeJay
*
* Copyright(C)2002 Niels Elburg <elburg@hio.hen.nl>
*
* 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.
*/
/* Note that the 'opacity' parameter is sometimes used as a
threshold value or substraction value depending on the mode
of this effect */
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include "chromamagick.h"
#include <math.h>
// fixme: mode 8 and 9 corrupt (green/purple cbcr)
vj_effect *chromamagick_init(int w, int h)
{
vj_effect *ve = (vj_effect *) vj_malloc(sizeof(vj_effect));
ve->num_params = 2;
ve->defaults = (int *) vj_malloc(sizeof(int) * ve->num_params); /* default values */
ve->limits[0] = (int *) vj_malloc(sizeof(int) * ve->num_params); /* min */
ve->limits[1] = (int *) vj_malloc(sizeof(int) * ve->num_params); /* max */
ve->defaults[0] = 7;
ve->defaults[1] = 150;
ve->description = "Chroma Magic";
ve->limits[0][0] = 0;
ve->limits[1][0] = 25;
ve->limits[0][1] = 0;
ve->limits[1][1] = 255;
ve->extra_frame = 1;
ve->sub_format = 1;
ve->has_user = 0;
return ve;
}
void chromamagic_selectmin(VJFrame *frame, VJFrame *frame2, int width,
int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int a, b;
const int op_b = 255 - op_a;
for (i = 0; i < len; i++) {
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
if (b < a) {
Y[i] = b;
Cb[i] = Cb2[i];
Cr[i] = Cr2[i];
}
}
}
void chromamagic_addsubselectlum(VJFrame *frame, VJFrame *frame2,
int width, int height, int op_a)
{
unsigned int i;
int c, a, b;
const int len = frame->len;
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];
const int op_b = 255 - op_a;
for (i = 0; i < len; i++) {
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
if (b < 16)
b = 16;
if (b > 235)
b = 235;
if (a < 16)
a = 16;
if (a > 235)
a = 235;
if (b < a) {
c = (a + b) >> 1;
Y[i] = c;
a = Cb[i];
b = Cb2[i];
c = (a + b) >> 1;
Cb[i] = c;
a = Cr[i];
b = Cr2[i];
c = (a + b) >> 1;
Cr[i] = c;
}
}
}
void chromamagic_selectmax(VJFrame *frame, VJFrame *frame2, int width,
int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int a, b;
const int op_b = 255 - op_a;
for (i = 0; i < len; i++) {
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
if (b > a) {
Y[i] = (3 * b + a)>>2;
Cb[i] = Cb2[i];
Cr[i] = Cr2[i];
}
}
}
void chromamagic_selectdiff(VJFrame *frame, VJFrame *frame2,
int width, int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int a, b;
int op_b = 255 - op_a;
for (i = 0; i < len; i++) {
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
if (a > b) {
Y[i] = abs(Y[i] - Y2[i]);
Cb[i] = (Cb[i] + Cb2[i]) >> 1;
Cr[i] = (Cr[i] + Cr2[i]) >> 1;
}
}
}
void chromamagic_diffreplace(VJFrame *frame, VJFrame *frame2, int width, int height, int threshold)
{
/* op_a = threshold */
const int len = frame->len;
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];
unsigned int i ;
int op_b ;
int op_a ;
int a,b;
unsigned long sum = 0;
for(i=0; i < len; i++)
{
sum += Y[i];
}
op_b = (sum & 0xff);
op_a = 255 - op_b;
for(i=0; i < len; i++)
{
if( abs(Y[i] - Y2[i]) >= threshold )
{
a = ( Y[i] * op_a );
b = ( Y2[i] * op_b );
Y[i] = (a + b) >> 8;
a = ( Cb[i] * op_a );
b = ( Cb2[i] * op_b );
Cb[i] = (a + b) >> 8;
a = ( Cr[i] * op_a );
b = ( Cr2[i] * op_b );
Cr[i] = (a + b) >> 8;
}
}
}
void chromamagic_selectdiffneg(VJFrame *frame, VJFrame *frame2,
int width, int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int a, b,c;
const int op_b = 255 - op_a;
for (i = 0; i < len; i++) {
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
if (a > b) {
c = 255 - abs(255 - a - b);
if( c < 16 ) c = 16; else if ( c > 240) c = 240;
Y[i] = c;
c = ((Cb[i] * op_a) + (Cb2[i]*op_b) )>>8;
if( c < 16 ) c = 16; else if ( c > 235) c = 235;
Cb[i] = c;
c = ((Cr[i] * op_a) + (Cr2[i]*op_b) )>>8;
if( c < 16) c = 16; else if ( c > 235) c = 235;
Cr[i] = c;
}
}
}
void chromamagic_selectunfreeze(VJFrame *frame, VJFrame *frame2,
int width, int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int c, a, b;
const int op_b = 255 - op_a;
for (i = 0; i < len; i++) {
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
if (a > b) {
if (a < 16)
c = 16;
else
c = 255 - ((255 - b) * (255 - b)) / a;
if (c < 16)
c = 16;
Y[i] = c;
Cb[i] = (Cb[i] + Cb2[i]) >> 1;
Cr[i] = (Cr[i] + Cr2[i]) >> 1;
}
}
}
void chromamagic_addlum(VJFrame *frame, VJFrame *frame2, int width,
int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int c, a, b;
const int op_b = 255 - op_a;
for (i = 0; i < len; i++) {
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
if (b < 16)
b = 16;
if (b > 235)
b = 235;
if (a < 16)
a = 16;
if (a > 235)
a = 235;
c = (a * a) / (255 - b);
if (c > 235)
c = 235;
if (c < 16)
c = 16;
Y[i] = c;
Cb[i] = (Cb[i] + Cb2[i]) >> 1;
Cr[i] = (Cr[i] + Cr2[i]) >> 1;
}
}
void chromamagic_exclusive(VJFrame *frame, VJFrame *frame2, int width, int height, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a=0, b=0, c=0;
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - a;
for (i = 0; i < len; i++) {
a = Y[i];
b = Y2[i];
if(a < 16) a = 16; else if(a > 235) a = 235;
if(b < 16) b = 16; else if(b > 235) b = 235;
a *= o1;
b *= o2;
a = a >> 8;
b = b >> 8;
c = (a+b) - ((a * b) >> 8);
if( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i]-128;
b = Cb2[i]-128;
c = (a + b) - (( a * b) >> 8);
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i]-128;
b = Cr2[i]-128;
c = (a + b) - ((a*b) >> 8);
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cr[i] = c;
}
}
void chromamagic_diffnegate(VJFrame *frame, VJFrame *frame2, int width, int height, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c,d;
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - o1;
#define MAGIC_THRESHOLD 40
for(i=0; i < len; i++) {
//a = (( 255 - Y[i]) * o1) >> 7; /* negation */
// b = (Y2[i] * o2) >> 7;
// d = abs( a - b );
a = Y[i];
b = Y2[i];
d = abs( a - b );
if ( d > MAGIC_THRESHOLD )
{
a = Y[i] * o1;
b = Cb2[i] * o2;
c = 255 - ( (a + b) >>8 );
if( c < 16 ) c = 16; else if ( c > 240) c = 240;
Y[i] = c;
// a = (( 255 - Cb[i]) * o1) >> 7;
// b = (Cb2[i] * o2) >> 7;
// c = 255 - abs(a - b);
// if ( c < 16) c = 16; else if ( c > 235 ) c = 235;
// Cb[i] = c;
a = (Cb[i]-128) * o1;
b = (Cb2[i]-128) * o2;
c = 255 - ( 128 + (( a + b ) >> 8 ));
Cb[i] = c;
a = (Cr[i]-128) * o1;
b = (Cr2[i]-128) * o2;
c = 255 - ( 128 + (( a + b ) >> 8 ));
// a = (( 255 - Cr[i]) * o1) >> 7;
// b = (Cr2[i] * o2) >> 7;
// c = 255 - abs( a- b);
if ( c < 16) c = 16; else if ( c > 235) c = 235;
Cr[i] = c;
}
}
}
void chromamagic_additive(VJFrame *frame, VJFrame *frame2, int width,
int height, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - op_a;
for(i=0; i < len; i++) {
a = (Y[i]*o1) >> 7;
b = (Y2[i]*o2) >> 7;
c = a + (( 2 * b ) - 255);
if( c < 16) c = 16; else if ( c > 235 ) c = 235;
Y[i] = c;
a = Cb[i];
b = Cb2[i];
c = a + ( ( 2 * b ) - 255 );
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Cb[i] = c ;
a = Cr[i] ;
b = Cr2[i] ;
c = a + ( ( 2 * b ) - 255 );
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Cr[i] = c ;
}
}
void chromamagic_basecolor(VJFrame *frame, VJFrame *frame2,
int width, int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int a, b, c, d;
const unsigned int o1 = op_a;
for (i = 0; i < len; i++) {
a = o1 - Y[i];
b = o1 - Y2[i];
c = a * b >> 8;
d = c + a * ((255 - (((255 - a) * (255 - b)) >> 8) - c) >> 8); //8
if ( d < 16 ) d = 16; else if ( d > 240 ) d = 240;
Y[i] = d;
a = Cb[i]-128;
b = Cb2[i]-128;
c = a * b >> 8;
d = c + a * ((255 - (((255-a) * (255-b)) >> 8) -c) >> 8);
d += 128;
if ( d < 16 ) d = 16; else if ( d > 235 ) d = 235;
Cb[i] = d;
a = Cr[i]-128;
b = Cr2[i]-128;
c = a * b >> 8;
d = c + a * ((255 - (((255-a) * (255-b)) >> 8) -c ) >> 8);
d += 128;
if ( d < 16 ) d = 16; else if ( d > 235 ) d = 235;
Cr[i] = d;
}
}
void chromamagic_freeze(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a) {
const int len = frame->len;
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];
unsigned int i;
int a,b,c;
if(op_a==0) op_a = 255;
for(i=0; i < len; i++) {
a = Y[i];
b = Y2[i];
if ( a < 16 ) a = 16;
if ( b < 16 ) b = 16;
c = 255 - ((op_a -a ) * (op_a - a)) / b;
if ( c < 16) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i];
b = Cb2[i];
if ( a < 16 ) a = 16;
if ( b < 16 ) b = 16;
c = 255 - ((255-a) * (255 - a)) / b;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i];
b = Cr2[i];
if ( a < 16 ) a = 16;
if ( b < 16 ) b = 16;
c = 255 - (( 255 - a ) * ( 255 - a )) / b;
if ( c < 16 ) c = 16; else if ( c> 235 ) c = 235;
Cr[i] = c;
}
}
void chromamagic_unfreeze( VJFrame *frame, VJFrame *frame2, int w, int h, int op_a ) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
for(i=0; i < len; i++) {
a = Y[i];
b = Y2[i];
if ( a < 16 ) a = 16;
if ( b < 16 ) b = 16;
c = 255 - (( op_a - b) * (op_a - b)) / a;
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i];
b = Cb2[i];
if ( a < 16) a = 16;
if ( b < 16) b = 16;
c = 255 - (( 255 - b) * ( 255 - b )) / a;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i];
b = Cr2[i];
if ( a < 16 ) a = 16;
if ( b < 16 ) b = 16;
c = 255 - ((255 -b ) * (255 - b)) /a ;
if ( c < 16 ) c = 16; else if ( c > 235) c = 235;
Cr[i] = c;
}
}
void chromamagic_hardlight( VJFrame *frame, VJFrame *frame2, int w, int h, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
for(i=0; i < len; i++) {
a = Y[i];
b = Y2[i];
if ( b < 128 ) {
c = ( a * b ) >> 8;
}
else {
c = 255 - (( op_a - b) * ( op_a - a ) >> 8);
}
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i]-128;
b = Cb2[i]-128;
if ( b < 128 ) c = ( a * b ) >> 8;
else c = 255 - (( 255 - b) * ( 255 - a) >> 8);
c += 128;
if ( c < 16) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i]-128;
b = Cr2[i]-128;
if ( b < 128) c = ( a * b ) >> 8;
else c = 255 - (( 255 - b) * ( 255 - a) >> 8 );
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cr[i] = c;
}
}
void chromamagic_multiply( VJFrame *frame, VJFrame *frame2, int w, int h,int op_a ) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - op_a;
for( i=0; i < len; i++) {
a = (Y[i] * o1) >> 8;
b = (Y2[i] * o2) >> 8;
c = (a * b) >> 8;
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i]-128;
b = Cb2[i]-128;
c = ( a * b ) >> 8;
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i] - 128;
b = Cr2[i] - 128;
c = ( a * b ) >> 8;
c += 128;
if ( c < 16 ) c = 16; else if ( c> 235) c = 235;
Cr[i] = c;
}
}
void chromamagic_divide(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a ) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
const unsigned int o1 = op_a;
for(i=0; i < len; i++) {
a = Y[i] * Y[i];
b = o1 - Y2[i];
if ( b < 16 ) b = 16;
c = a / b;
if ( c < 16 ) c = 16; else if (c > 240) c = 240;
Y[i] = c;
a = Cb[i] * Cb2[i];
b = 255 - Cb2[i];
if ( b < 16 ) b = 16;
c = a / b;
if ( c < 16) c= 16; else if ( c > 235) c = 235;
Cb[i] = c;
a = Cr[i] * Cr[i];;
b = 255 - Cr2[i];
if ( b < 16 ) b = 16;
c = ( a / b );
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cr[i] = c;
}
}
void chromamagic_substract(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a ,b, c;
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - op_a;
for( i=0; i < len; i++ )
{
a = Y[i];
b = Y2[i];
c = a - ((b * o1) >> 8);
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Y[i] = c;
a = Cb[i];
b = Cb2[i];
c = (((a * o2) + (b * o1))>>8);
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Cb[i] = c;
a = Cr[i];
b = Cr2[i];
c = (((a * o2) + (b * o1)) >> 8);
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Cr[i] = c;
}
}
void chromamagic_add(VJFrame *frame, VJFrame *frame2, int width,
int height, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
for(i=0; i < len; i++) {
a = Y[i];
b = Y2[i];
c = a + (( 2 * b ) - op_a);
if( c < 16) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i]-128;
b = Cb2[i]-128;
c = a + ( 2 * b );
c += 128;
if( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i]-128;
b = Cr2[i]-128;
c = a + ( 2 * b );
c += 128;
if( c < 16 ) c = 16; else if ( c > 235) c = 235;
Cr[i] = c;
}
}
void chromamagic_screen(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
for(i=0; i < len; i++) {
a = Y[i];
b = Y2[i];
c = 255 - ( (op_a-a) * (op_a-b) >> 8);
if( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i]-128;
b = Cb2[i]-128;
c = 255 - ( ( 255-a) * (255 - b) >> 8);
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i]-128;
b = Cr2[i]-128;
c = 255 - ( ( 255 -a) * (255 - b)>>8);
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cr[i] = c;
}
}
void chromamagic_difference(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a) {
unsigned int i;
const int len = frame->len;
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];
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - op_a;
int a,b,c;
for(i=0; i < len; i++) {
a = (Y[i] * o1)>>7;
b = (Y2[i] * o2)>>7;
c = abs ( a - b );
if( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = (Cb[i]-128);
b = (Cb2[i]-128);
c = abs ( a - b );
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = (Cr[i]-128);
b = (Cr2[i]-128);
c = abs( a - b );
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cr[i] = c;
}
}
/* not really softlight but still cool */
void chromamagic_softlightmode(VJFrame *frame,VJFrame *frame2,
int width,int height, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c,d;
for(i=0; i < len; i++) {
a = Y[i];
b = Y2[i];
if ( a < op_a ) {
c = (a * b) >> 8;
d = (c + a * ( 255 - ( (255-a)*(255-b) >> 8) - c)) >> 8;
if ( d < 16 ) d = 16; else if ( d > 240) d = 240;
/* deal with chroma red/blue in a magical way
range gets narrowed.
*/
a = abs(Cb[i]-128);
b = abs(Cb2[i]-128);
c = (a * b);
d = (c + a * ( 255 - ( (a * b) >> 7) - c)) >> 7;
d += 128;
if ( d < 16) d = 16; else if ( d > 235 ) d = 235;
Cb[i] = d;
a = abs(Cr[i]-128);
b = abs(Cr2[i]-128);
c = (a * b) >> 7;
d = (c + a * ( 255 - ( (a * b) >> 7) -c)) >> 7;
d += 128;
if( d < 16) d= 16; else if ( d > 235 ) d= 235;
Cr[i] = d;
}
}
}
void chromamagic_dodge(VJFrame *frame, VJFrame *frame2, int w, int h,
int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
for(i=0; i < len; i++) {
a = Y[i];
b = Y2[i];
if( a >= op_a) c = a;
else {
if( b > 240 ) b = 240;
if( a < 16) a = 16;
c = (a << 8) / ( 255 - b );
if ( c < 16 ) c = 16; else if (c > 240 ) c = 240;
Y[i] = c;
a = Cb[i] - 128;
b = Cb2[i] - 128;
if ( b > 127 ) b = 127;
c = ( a << 7 ) / ( 128 - b );
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235) c = 235;
Cb[i] = c;
a = Cr[i] - 128;
b = Cr2[i] - 128;
if ( b > 127 ) b = 127;
c = ( a << 7 ) / ( 128 - b);
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cr[i] = c;
}
}
}
void chromamagic_darken(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - op_a;
for(i=0; i < len; i++)
{
if(Y[i] > Y2[i])
{
Y[i] = ((Y[i] * o1) + (Y2[i] * o2)) >> 8;
Cb[i] = ((Cb[i] * o1) + (Cb2[i] * o2)) >> 8;
Cr[i] = ((Cr[i] * o1) + (Cr2[i] * o2)) >> 8;
}
}
}
void chromamagic_lighten(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
const unsigned int o1 = op_a;
const unsigned int o2 = 255 - op_a;
for(i=0; i < len; i++)
{
if(Y[i] < Y2[i])
{
Y[i] = ((Y[i] * o1) + (Y2[i] * o2)) >> 8;
Cb[i] = ((Cb[i] * o1) + (Cb2[i] * o2)) >> 8;
Cr[i] = ((Cr[i] * o1) + (Cr2[i] * o2)) >> 8;
}
}
}
void chromamagic_reflect(VJFrame *frame, VJFrame *frame2,
int width,int height, int op_a) {
unsigned int i;
const int len = frame->len;
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];
int a,b,c;
for(i=0; i < len ; i++) {
a = Y[i];
b = Y2[i];
if ( b > op_a ) c = b;
else {
if ( b > 240 ) b = 240;
if ( a < 16 ) a = 16;
c = (a * a) / ( 255 - b );
if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
Y[i] = c;
a = Cb[i];
b = Cb2[i];
if ( a < 16 ) a = 16;
if ( b < 16 ) b = 16;
a -= 128;
b -= 128;
if ( b == 128 ) b = 127;
c = ( a * a ) / ( 128 - b);
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cb[i] = c;
a = Cr[i];
b = Cr2[i];
if ( a < 16 ) a = 16;
if ( b < 16 ) b = 16;
a -= 128;
b -= 128;
if ( b == 128) b = 127;
c = ( a * a ) / ( 128 - b);
c += 128;
if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
Cr[i] = c;
}
}
}
void chromamagic_modadd(VJFrame *frame, VJFrame *frame2, int width,
int height, int op_a)
{
unsigned int i;
const int len = frame->len;
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];
int a, b;
const int op_b = 255 - op_a;
for (i = 0; i < len; i++)
{
a = (Y[i] * op_a) >> 8;
b = (Y2[i] * op_b) >> 8;
Y[i] = (a + ( 2 * b - 128)) & 255;
a = (Cb[i] * op_a) >> 8;
b = (Cb2[i] * op_b ) >> 8;
Cb[i] = (a + ( 2 * b )) & 255;
a = (Cr[i] * op_a ) >> 8;
b = (Cr2[i] * op_b ) >> 8;
Cr[i] = (a + ( 2 * b ) ) & 255;
}
}
void chromamagick_apply(VJFrame *frame, VJFrame *frame2,
int width, int height, int type, int op_a)
{
switch (type) {
case 0:
chromamagic_addsubselectlum(frame, frame2, width, height, op_a);
break;
case 1:
chromamagic_selectmin(frame, frame2, width, height, op_a);
break;
case 2:
chromamagic_selectmax(frame, frame2, width, height, op_a);
break;
case 3:
chromamagic_selectdiff(frame, frame2, width, height, op_a);
break;
case 4:
chromamagic_selectdiffneg(frame, frame2, width, height, op_a);
break;
case 5:
chromamagic_addlum(frame, frame2, width, height, op_a);
break;
case 6:
chromamagic_selectunfreeze(frame, frame2, width, height, op_a);
break;
case 7:
chromamagic_exclusive(frame,frame2,width,height,op_a);
break;
case 8:
chromamagic_diffnegate(frame,frame2,width,height,op_a);
break;
case 9:
chromamagic_additive( frame,frame2,width,height,op_a);
break;
case 10:
chromamagic_basecolor(frame,frame2,width,height,op_a);
break;
case 11:
chromamagic_freeze(frame,frame2,width,height,op_a);
break;
case 12:
chromamagic_unfreeze(frame,frame2,width,height,op_a);
break;
case 13:
chromamagic_hardlight(frame,frame2,width,height,op_a);
break;
case 14:
chromamagic_multiply(frame,frame2,width,height,op_a);
break;
case 15:
chromamagic_divide(frame,frame2,width,height,op_a);
break;
case 16:
chromamagic_substract(frame,frame2,width,height,op_a);
break;
case 17:
chromamagic_add(frame,frame2,width,height,op_a);
break;
case 18:
chromamagic_screen(frame,frame2,width,height,op_a);
break;
case 19:
chromamagic_difference(frame,frame2,width,height,op_a);
break;
case 20:
chromamagic_softlightmode(frame,frame2,width,height,op_a);
break;
case 21:
chromamagic_dodge(frame,frame2,width,height,op_a);
break;
case 22:
chromamagic_reflect(frame,frame2,width,height,op_a);
break;
case 23:
chromamagic_diffreplace(frame,frame2,width,height,op_a);
break;
case 24:
chromamagic_darken( frame,frame2,width,height,op_a);
break;
case 25:
chromamagic_lighten( frame,frame2,width,height,op_a);
break;
case 26:
chromamagic_modadd( frame,frame2,width,height,op_a);
break;
}
}
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