mirror of
https://github.com/game-stop/veejay.git
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93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2004 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 "toalpha.h"
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typedef struct {
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int lookup_table[256];
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} toalpha_t;
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vj_effect *toalpha_init(int w, int h)
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{
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vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 1;
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ve->description = "Alpha: Set from Image";
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ve->sub_format = -1;
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ve->extra_frame = 0;
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ve->parallel = 1;
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ve->has_user = 0;
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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->limits[0][0] = 0;
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ve->limits[1][0] = 1;
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ve->defaults[0] = !yuv_use_auto_ccir_jpeg();
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ve->param_description = vje_build_param_list( ve->num_params, "Scale Luminance to range 0-255 (1=on)" );
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ve->alpha = FLAG_ALPHA_OUT;
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ve->hints = vje_init_value_hint_list( ve->num_params );
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vje_build_value_hint_list( ve->hints, ve->limits[1][0], 0, "Verbatim", "Full range" );
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return ve;
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}
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void *toalpha_malloc(int w, int h)
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{
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toalpha_t *t = (toalpha_t*) vj_calloc(sizeof(toalpha_t));
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if(!t) {
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return NULL;
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}
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__init_lookup_table( t->lookup_table, 256, 16.0f, 235.0f, 0, 255 );
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return t;
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}
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void toalpha_free(void *ptr) {
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free(ptr);
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}
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void toalpha_apply( void *ptr, VJFrame *frame, int *args )
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{
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const int len = frame->len;
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uint8_t *a = frame->data[3];
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uint8_t *Y = frame->data[0];
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int mode = args[0];
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toalpha_t *t = (toalpha_t*) ptr;
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int *lookup_table = t->lookup_table;
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if( mode == 0 ) {
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veejay_memcpy(a, Y, len );
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}
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else {
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int i;
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for( i = 0; i < len; i ++ )
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{
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a[i] = lookup_table[ Y[i] ];
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}
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}
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}
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