mirror of
https://github.com/game-stop/veejay.git
synced 2025-12-17 05:10:00 +01:00
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*
|
|
* Linux VeeJay
|
|
*
|
|
* Copyright(C)2004 Niels Elburg <elburg@hio.hen.nl>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License , or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
|
|
*/
|
|
|
|
|
|
/*
|
|
Nervous is loosly based on Kentaro's Nervous effect, found
|
|
in EffecTV ( http://effectv.sf.net ).
|
|
|
|
*/
|
|
#include <config.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <libvjmem/vjmem.h>
|
|
#include "nervous.h"
|
|
|
|
#define N_MAX 25
|
|
|
|
static uint8_t *nervous_buf[3]; // huge buffer
|
|
static int frames_elapsed;
|
|
|
|
vj_effect *nervous_init(int w, int h)
|
|
{
|
|
vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
|
|
ve->num_params = 1;
|
|
|
|
ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
|
|
ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
|
|
ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
|
|
ve->limits[0][0] = 0;
|
|
ve->limits[1][0] = N_MAX;
|
|
ve->defaults[0] = N_MAX;
|
|
ve->description = "Nervous";
|
|
ve->sub_format = 0;
|
|
ve->extra_frame = 0;
|
|
ve->has_user = 0;
|
|
ve->param_description = vje_build_param_list( ve->num_params, "Buffer length");
|
|
return ve;
|
|
}
|
|
|
|
int nervous_malloc(int w, int h )
|
|
{
|
|
nervous_buf[0] = (uint8_t*) vj_malloc(sizeof(uint8_t) * w * h * N_MAX * 3);
|
|
|
|
if(!nervous_buf[0]) return 0;
|
|
nervous_buf[1] = nervous_buf[0] + (w*h*N_MAX);
|
|
nervous_buf[2] = nervous_buf[1] + (w*h*N_MAX);
|
|
frames_elapsed = 0;
|
|
|
|
vj_frame_clear1( nervous_buf[0], 0, (w*h) * N_MAX );
|
|
vj_frame_clear1( nervous_buf[1], 128, (w*h) * N_MAX );
|
|
vj_frame_clear1( nervous_buf[2], 128, (w*h) * N_MAX );
|
|
|
|
return 1;
|
|
}
|
|
|
|
void nervous_free(void)
|
|
{
|
|
if( nervous_buf[0] ) free(nervous_buf[0]);
|
|
nervous_buf[0] = NULL;
|
|
nervous_buf[1] = NULL;
|
|
nervous_buf[2] = NULL;
|
|
}
|
|
|
|
|
|
void nervous_apply( VJFrame *frame, int width, int height, int delay)
|
|
{
|
|
unsigned int i;
|
|
int len = (width * height);
|
|
int uv_len = frame->uv_len;
|
|
uint8_t *Y = frame->data[0];
|
|
uint8_t *Cb = frame->data[1];
|
|
uint8_t *Cr = frame->data[2];
|
|
uint8_t *NY = nervous_buf[0] + (len * frames_elapsed );
|
|
uint8_t *NCb= nervous_buf[1] + (uv_len * frames_elapsed );
|
|
uint8_t *NCr= nervous_buf[2] + (uv_len * frames_elapsed );
|
|
|
|
uint8_t *dest[4] = { NY, NCb, NCr, NULL };
|
|
int strides[4] = { len, uv_len,uv_len, 0 };
|
|
// copy original into nervous buf
|
|
vj_frame_copy( frame->data, dest, strides );
|
|
|
|
if(frames_elapsed > 0)
|
|
{
|
|
// take a random frame
|
|
unsigned int index = (unsigned int) ((double)frames_elapsed *
|
|
rand() / (RAND_MAX+1.0) );
|
|
// setup pointers
|
|
uint8_t *sY = nervous_buf[0] + (len * index);
|
|
uint8_t *sCb = nervous_buf[1] + (uv_len * index);
|
|
uint8_t *sCr = nervous_buf[2] + (uv_len * index);
|
|
// copy it to dst
|
|
dest[0] = sY;
|
|
dest[1] = sCb;
|
|
dest[2] = sCr;
|
|
|
|
vj_frame_copy( dest, frame->data, strides );
|
|
}
|
|
|
|
frames_elapsed ++;
|
|
|
|
if( frames_elapsed == N_MAX )
|
|
frames_elapsed = 0;
|
|
|
|
}
|