mirror of
https://github.com/game-stop/veejay.git
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93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2004-2015 Niels Elburg <nwelburg@gmail.com>
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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 "common.h"
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#include <veejaycore/vjmem.h>
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#include "levelcorrection.h"
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vj_effect *levelcorrection_init(int w,int h)
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{
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vj_effect *ve;
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ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 4;
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ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
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ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
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ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
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ve->defaults[0] = 0; /* minimum level */
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ve->defaults[1] = 255; /* maximum level */
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ve->defaults[2] = 0;
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ve->defaults[3] = 0; /* disabled */
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ve->limits[0][0] = 0;
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ve->limits[1][0] = 255;
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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] = 255;
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ve->limits[0][3] = 0;
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ve->limits[1][3] = 255;
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ve->param_description = vje_build_param_list(ve->num_params, "Level Min", "Level Max", "Shrink Min", "Shrink Max");
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ve->has_user = 0;
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ve->description = "Alpha: Level Correction";
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ve->extra_frame = 0;
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ve->sub_format = -1;
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ve->rgb_conv = 0;
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ve->parallel = 1;
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ve->alpha = FLAG_ALPHA_OUT | FLAG_ALPHA_SRC_A;
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return ve;
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}
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void levelcorrection_apply(void *ptr, VJFrame *frame, int *args) {
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int min = args[0];
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int max = args[1];
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int bmin = args[2];
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int bmax = args[3];
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unsigned int pos;
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uint8_t *A = frame->data[3];
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const int len = frame->len;
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/* level correction tables */
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uint8_t __lookup_table[256];
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uint8_t __lookup_tableII[256];
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if( max > min ) {
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__init_lookup_table( __lookup_table, 256, (float)min, (float)max, 0, 0xff );
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for( pos = 0; pos < len; pos ++ ) {
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A[pos] = __lookup_table[A[pos]];
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}
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}
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if( bmax > bmin ) {
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__init_lookup_table( __lookup_tableII, 256, 0.0f, 255.0f, bmin,bmax );
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for( pos = 0; pos < len; pos ++ ) {
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A[pos] = __lookup_tableII[ A[pos] ];
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}
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}
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}
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