mirror of
https://github.com/game-stop/veejay.git
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92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2002 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 "smuck.h"
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vj_effect *smuck_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->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] = 1;
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ve->limits[0][0] = 0;
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ve->limits[1][0] = 18;
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ve->description = "SmuckTV (EffectTV)";
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ve->sub_format = -1;
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ve->extra_frame = 0;
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ve->has_user = 0;
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ve->param_description = vje_build_param_list( ve->num_params, "Smuck");
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return ve;
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}
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typedef struct {
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int rand_val;
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} smuck_t;
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void* smuck_malloc(int w, int h) {
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return (void*) vj_calloc( sizeof(smuck_t) );
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}
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void smuck_free(void *ptr) {
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free(ptr);
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}
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static inline unsigned int smuck_fastrand(smuck_t *s)
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{
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return (s->rand_val = s->rand_val * 1103516245 + 12345);
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}
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/* this effect comes from Effect TV as well; the code for this one is in Transform
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different is the smuck table containing some values.
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This effect was originally created by Buddy Smith, one of EffecTV's developers from the USA
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*/
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void smuck_apply( void *ptr, VJFrame *frame, int *args)
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{
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const unsigned int width = frame->width;
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const unsigned int height = frame->height;
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unsigned int yd, xd, x, y;
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smuck_t *s = (smuck_t*) ptr;
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int n = args[0];
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VJFrame *frame2 = frame;
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// different table ...
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const unsigned int smuck[18] =
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{ 12, 21, 30, 60, 58, 59, 57, 56, 55, 54, 53, 89, 90, 88, 87, 86, 85, 114 };
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uint8_t *Y = frame->data[0];
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uint8_t *Y2 = frame2->data[0];
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for (y = 0; y < height; y++) {
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for (x = 0; x < width; x++) {
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yd = y + (smuck_fastrand(s) >> smuck[n]) - 2;
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xd = x + (smuck_fastrand(s) >> smuck[n]) - 2;
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if (xd > width)
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xd = width-1;
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if (yd > height)
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yd = height;
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Y[x + y * width] = Y2[xd + yd * width];
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}
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}
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}
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