mirror of
https://github.com/game-stop/veejay.git
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361 lines
8.0 KiB
C
361 lines
8.0 KiB
C
/*
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* VeeJay
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*
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* Copyright(C)2002-2005 Niels Elburg <nelburg@looze.net>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License , or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "flare.h"
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#include "common.h"
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/* blend by blurred mask.
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derived from radial blur and chromamagick effect.
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*/
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vj_effect *flare_init(int w, int h)
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{
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vj_effect *ve = (vj_effect *) vj_malloc(sizeof(vj_effect));
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ve->num_params = 3;
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ve->defaults = (int *) vj_malloc(sizeof(int) * ve->num_params); /* default values */
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ve->limits[0] = (int *) vj_malloc(sizeof(int) * ve->num_params); /* min */
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ve->limits[1] = (int *) vj_malloc(sizeof(int) * ve->num_params); /* max */
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ve->defaults[0] = 3;
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ve->defaults[1] = 25;
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ve->defaults[2] = 100;
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ve->description = "Flare (Glow)";
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ve->limits[0][0] = 0; /* p0 = type, p2 = opacity, p3 = radius */
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ve->limits[1][0] = 5;
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ve->limits[0][1] = 0;
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ve->limits[1][1] = 255;
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ve->limits[0][2] = 0;
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ve->limits[1][2] = 100;
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ve->extra_frame = 0;
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ve->sub_format = 1;
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ve->has_user = 0;
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return ve;
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}
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static uint8_t *flare_buf[3];
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int flare_malloc(int w, int h)
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{
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flare_buf[0] = (uint8_t*)vj_malloc(sizeof(uint8_t) * w * h );
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if(!flare_buf[0])
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return 0;
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flare_buf[1] = (uint8_t*)vj_malloc(sizeof(uint8_t) * w * h );
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if(!flare_buf[1])
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return 0;
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flare_buf[2] = (uint8_t*)vj_malloc(sizeof(uint8_t) * w * h );
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if(!flare_buf[2])
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return 0;
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return 1;
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}
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void flare_free(void)
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{
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if(flare_buf[0]) free(flare_buf[0]);
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flare_buf[0] = NULL;
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if(flare_buf[1]) free(flare_buf[1]);
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flare_buf[1] = NULL;
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if(flare_buf[2]) free(flare_buf[2]);
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flare_buf[2] = NULL;
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}
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void flare_exclusive(VJFrame *frame, VJFrame *frame2, int width, int height, int op_a) {
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unsigned int i;
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const int len = frame->len;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb = frame->data[1];
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uint8_t *Cr = frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2 = frame2->data[1];
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uint8_t *Cr2 = frame2->data[2];
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int a=0, b=0, c=0;
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const unsigned int o1 = op_a;
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const unsigned int o2 = 255 - a;
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for (i = 0; i < len; i++)
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{
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a = Y[i];
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b = Y2[i];
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if(a < 16) a = 16; else if(a > 235) a = 235;
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if(b < 16) b = 16; else if(b > 235) b = 235;
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a *= o1;
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b *= o2;
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a = a >> 8;
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b = b >> 8;
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c = (a+b) - ((a * b) >> 8);
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if( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
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Y[i] = c;
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a = Cb[i]-128;
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b = Cb2[i]-128;
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c = (a + b) - (( a * b) >> 8);
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c += 128;
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if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
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Cb[i] = c;
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a = Cr[i]-128;
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b = Cr2[i]-128;
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c = (a + b) - ((a*b) >> 8);
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c += 128;
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if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
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Cr[i] = c;
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}
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}
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void flare_additive(VJFrame *frame, VJFrame *frame2, int width,
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int height, int op_a) {
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unsigned int i;
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const int len = frame->len;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb = frame->data[1];
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uint8_t *Cr = frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2 = frame2->data[1];
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uint8_t *Cr2 = frame2->data[2];
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int a,b,c;
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const unsigned int o1 = op_a;
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const unsigned int o2 = 255 - op_a;
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for(i=0; i < len; i++)
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{
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a = (Y[i]*o1) >> 7;
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b = (Y2[i]*o2) >> 7;
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c = a + (( 2 * b ) - 255);
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if( c < 16) c = 16; else if ( c > 235 ) c = 235;
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Y[i] = c;
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a = Cb[i];
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b = Cb2[i];
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c = a + ( ( 2 * b ) - 255 );
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if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
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Cb[i] = c ;
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a = Cr[i] ;
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b = Cr2[i] ;
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c = a + ( ( 2 * b ) - 255 );
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if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
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Cr[i] = c ;
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}
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}
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void flare_unfreeze( VJFrame *frame, VJFrame *frame2, int w, int h, int op_a ) {
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unsigned int i;
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const int len = frame->len;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb = frame->data[1];
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uint8_t *Cr = frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2 = frame2->data[1];
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uint8_t *Cr2 = frame2->data[2];
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int a,b,c;
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for(i=0; i < len; i++)
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{
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a = Y[i];
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b = Y2[i];
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if ( a < 16 ) a = 16;
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if ( b < 16 ) b = 16;
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c = 255 - (( op_a - b) * (op_a - b)) / a;
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if ( c < 16 ) c = 16; else if ( c > 240 ) c = 240;
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Y[i] = c;
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a = Cb[i];
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b = Cb2[i];
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if ( a < 16) a = 16;
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if ( b < 16) b = 16;
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c = 255 - (( 255 - b) * ( 255 - b )) / a;
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if ( c < 16 ) c = 16; else if ( c > 235 ) c = 235;
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Cb[i] = c;
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a = Cr[i];
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b = Cr2[i];
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if ( a < 16 ) a = 16;
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if ( b < 16 ) b = 16;
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c = 255 - ((255 -b ) * (255 - b)) /a ;
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if ( c < 16 ) c = 16; else if ( c > 235) c = 235;
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Cr[i] = c;
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}
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}
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void flare_darken(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a)
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{
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unsigned int i;
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const int len = frame->len;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb = frame->data[1];
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uint8_t *Cr = frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2 = frame2->data[1];
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uint8_t *Cr2 = frame2->data[2];
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const unsigned int o1 = op_a;
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const unsigned int o2 = 255 - op_a;
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for(i=0; i < len; i++)
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{
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if(Y[i] > Y2[i])
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{
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Y[i] = ((Y[i] * o1) + (Y2[i] * o2)) >> 8;
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Cb[i] = ((Cb[i] * o1) + (Cb2[i] * o2)) >> 8;
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Cr[i] = ((Cr[i] * o1) + (Cr2[i] * o2)) >> 8;
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}
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}
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}
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void flare_simple( VJFrame *frame, VJFrame *frame2, int w, int h, int op_a )
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{
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unsigned int i;
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unsigned int len = w* h;
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int uv_len = frame->uv_len;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb= frame->data[1];
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uint8_t *Cr= frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2= frame2->data[1];
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uint8_t *Cr2= frame2->data[2];
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int a, b, c, d;
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const uint8_t solid = 255 - op_a;
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uint8_t premul;
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for (i = 0; i < len; i++)
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{
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premul = ((Y2[i] * op_a) + (solid * 0xff )) >> 8;
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Y[i] = ( (Y[i] >> 1) + (premul >> 1 ) );
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}
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}
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void flare_lighten(VJFrame *frame, VJFrame *frame2, int w, int h, int op_a)
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{
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unsigned int i;
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const int len = frame->len;
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uint8_t *Y = frame->data[0];
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uint8_t *Cb = frame->data[1];
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uint8_t *Cr = frame->data[2];
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uint8_t *Y2 = frame2->data[0];
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uint8_t *Cb2 = frame2->data[1];
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uint8_t *Cr2 = frame2->data[2];
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const unsigned int o1 = op_a;
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const unsigned int o2 = 255 - op_a;
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for(i=0; i < len; i++)
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{
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if(Y[i] < Y2[i])
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{
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Y[i] = ((Y[i] * o1) + (Y2[i] * o2)) >> 8;
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Cb[i] = ((Cb[i] * o1) + (Cb2[i] * o2)) >> 8;
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Cr[i] = ((Cr[i] * o1) + (Cr2[i] * o2)) >> 8;
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}
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}
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}
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void flare_apply(VJFrame *A,
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int width, int height, int type, int op_a, int radius)
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{
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int y,x;
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int plane = 0;
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/* clone A */
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VJFrame B;
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veejay_memcpy( &B, A, sizeof(VJFrame));
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/* data is local */
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B.data[0] = flare_buf[0];
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B.data[1] = flare_buf[1];
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B.data[2] = flare_buf[2];
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/* copy image data */
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veejay_memcpy( B.data[0], A->data[0], A->len );
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veejay_memcpy( B.data[1], A->data[1], A->len );
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veejay_memcpy( B.data[2], A->data[2], A->len );
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/* apply blur on Image, horizontal and vertical
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(blur2 is from xine, see radial blur */
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for( plane = 0; plane < 2; plane ++ )
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{
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for( y = 0; y < height; y ++ )
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blur2( A->data[plane] + (y * width),
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B.data[plane] + (y * width),
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width,
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radius,
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2,
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1,
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1 );
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for( x = 0; x < width; x ++ )
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blur2( A->data[plane] + x ,
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B.data[plane] + x,
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height,
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radius,
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2,
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width,
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width );
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}
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/* overlay original on top of blurred image */
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switch( type )
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{
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case 1:
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flare_exclusive(A,&B,width,height,op_a);
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break;
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case 2:
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flare_additive(A,&B,width,height,op_a);
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break;
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case 3:
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flare_unfreeze(A,&B,width,height,op_a);
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break;
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case 4:
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flare_darken(A,&B,width,height,op_a);
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break;
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case 5:
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flare_lighten( A, &B, width, height, op_a );
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break;
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default:
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flare_simple( A, &B, width,height, op_a );
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break;
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}
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}
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