mirror of
https://github.com/game-stop/veejay.git
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110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2002 Niels Elburg <elburg@hio.hen.nl>
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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 "motionblur.h"
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#include <stdlib.h>
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#include <config.h>
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static uint8_t *previous_frame[3];
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vj_effect *motionblur_init(int width, int height)
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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] = 15;
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ve->limits[0][0] = 0;
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ve->limits[1][0] = 1000; /* time in frames */
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ve->description = "Motion blur";
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ve->sub_format = 0;
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ve->extra_frame = 0;
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ve->has_user = 0;
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return ve;
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}
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int motionblur_malloc(int width, int height)
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{
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previous_frame[0] = (uint8_t*) vj_yuvalloc( width , height );
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if(!previous_frame[0]) return 0;
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previous_frame[1] = previous_frame[0] + (width * height);
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previous_frame[2] = previous_frame[1] + (width * height);
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return 1;
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}
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void motionblur_free() {
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if(previous_frame[0])
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free(previous_frame[0]);
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previous_frame[0] = NULL;
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previous_frame[1] = NULL;
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previous_frame[2] = NULL;
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}
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static int n_motion_frames = 0;
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void motionblur_apply( VJFrame *frame, int width, int height, int n) {
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const int len = width * height;
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const int uv_len = frame->uv_len;
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unsigned int i;
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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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if(n_motion_frames > 0) {
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for(i=0; i < len; i++) {
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Y[i] = (Y[i] + previous_frame[0][i])>>1;
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previous_frame[0][i] = Y[i];
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}
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for(i=0; i < uv_len; i++) {
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Cb[i] = (Cb[i] + previous_frame[1][i])>>1;
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Cr[i] = (Cr[i] + previous_frame[2][i])>>1;
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previous_frame[1][i] = Cb[i];
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previous_frame[2][i] = Cr[i];
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}
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}
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else
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{
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/* just copy to previous */
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veejay_memcpy( previous_frame[0], Y, len );
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veejay_memcpy( previous_frame[1], Cb, uv_len);
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veejay_memcpy( previous_frame[2], Cr, uv_len);
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}
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n_motion_frames ++;
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if(n_motion_frames >= n ) {
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n_motion_frames = 0;
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memset( previous_frame[0], 0, (width*height));
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memset( previous_frame[1], 0, uv_len);
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memset( previous_frame[2], 0, uv_len);
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}
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}
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