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/*
* Pure Data Packet module.
* Copyright (c) by Tom Schouten <tom@zwizwa.be>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include "pdp.h"
#include "pdp_base.h"
#include <math.h>
typedef struct pdp_chrot_struct
{
t_pdp_base x_base;
float x_matrix[4];
void *x_crot2d;
} t_pdp_chrot;
static void pdp_chrot_process(t_pdp_chrot *x)
{
int packet;
t_pdp *header;
void *data;
unsigned int w,h,size,v_offset;
short int *idata;
/* get packet & info */
packet = pdp_base_get_packet(x, 0);
header = pdp_packet_header(packet);
data = pdp_packet_data (packet);
/* only process if we have a vlid yv12 image */
if ((header) && (PDP_IMAGE == header->type) && (PDP_IMAGE_YV12 == header->info.image.encoding)){
w = header->info.image.width;
h = header->info.image.height;
size = w*h;
v_offset = size;
idata = (short int *)data;
/* color rotation for 2 colour planes */
pdp_imageproc_crot2d_process(x->x_crot2d, idata + v_offset, w>>1, h>>1);
}
return;
}
static void pdp_chrot_setelement(t_pdp_chrot *x, int element, float f)
{
x->x_matrix[element] = f;
}
static void pdp_chrot_angle_radians(t_pdp_chrot *x, t_floatarg angle)
{
float c = cos(angle);
float s = sin(angle);
pdp_chrot_setelement(x, 0, c);
pdp_chrot_setelement(x, 1, s);
pdp_chrot_setelement(x, 2, -s);
pdp_chrot_setelement(x, 3, c);
pdp_imageproc_crot2d_setmatrix(x->x_crot2d, x->x_matrix);
}
static void pdp_chrot_angle_degrees(t_pdp_chrot *x, t_floatarg angle)
{
pdp_chrot_angle_radians(x, (angle * (M_PI / 180.f)));
}
static void pdp_chrot_free(t_pdp_chrot *x)
{
pdp_base_free(x);
pdp_imageproc_crot2d_delete(x->x_crot2d);
}
t_class *pdp_chrot_class;
void *pdp_chrot_new(t_floatarg __attribute__((unused)) f)
{
t_pdp_chrot *x = (t_pdp_chrot *)pd_new(pdp_chrot_class);
pdp_base_init(x);
pdp_base_add_gen_inlet(x, gensym("float"), gensym("angle"));
pdp_base_add_pdp_outlet(x);
pdp_base_set_process_method(x, (t_pdp_method)pdp_chrot_process);
x->x_crot2d = pdp_imageproc_crot2d_new();
pdp_chrot_angle_radians(x, 0.0f);
return (void *)x;
}
#ifdef __cplusplus
extern "C"
{
#endif
void pdp_chrot_setup(void)
{
pdp_chrot_class = class_new(gensym("pdp_chrot"), (t_newmethod)pdp_chrot_new,
(t_method)pdp_chrot_free, sizeof(t_pdp_chrot), 0, A_DEFFLOAT, A_NULL);
pdp_base_setup(pdp_chrot_class);
class_addmethod(pdp_chrot_class, (t_method)pdp_chrot_angle_degrees, gensym("angle"), A_DEFFLOAT, A_NULL);
}
#ifdef __cplusplus
}
#endif
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