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/*
Copyright (C) 2003-2013 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio 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 3 of the License, or
(at your option) any later version.
aubio 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 aubio. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "aubio_priv.h"
#include "parameter.h"
#define AUBIO_PARAM_MAX_STEPS 2000
#define AUBIO_PARAM_MIN_STEPS 1
struct _aubio_parameter_t {
smpl_t current_value;
smpl_t target_value;
smpl_t increment;
smpl_t max_value;
smpl_t min_value;
uint_t steps;
};
aubio_parameter_t * new_aubio_parameter (smpl_t min_value, smpl_t max_value, uint_t steps )
{
aubio_parameter_t * param = AUBIO_NEW(aubio_parameter_t);
param->min_value = min_value;
param->max_value = max_value;
param->steps = steps;
param->current_value = param->min_value;
param->target_value = param->current_value;
param->increment = 0.;
return param;
}
uint_t aubio_parameter_set_target_value ( aubio_parameter_t * param, smpl_t value )
{
uint_t err = AUBIO_OK;
if (value < param->min_value ) {
param->target_value = param->min_value;
err = AUBIO_FAIL;
} else if ( value > param->max_value ) {
param->target_value = param->max_value;
err = AUBIO_FAIL;
} else {
param->target_value = value;
}
param->increment = ( param->target_value - param->current_value ) / param->steps;
return err;
}
uint_t aubio_parameter_set_current_value ( aubio_parameter_t * param, smpl_t value )
{
uint_t err = AUBIO_OK;
if (value < param->min_value ) {
param->current_value = param->min_value;
err = AUBIO_FAIL;
} else if ( value > param->max_value ) {
param->current_value = param->max_value;
err = AUBIO_FAIL;
} else {
param->current_value = value;
}
param->target_value = param->current_value;
param->increment = 0;
return err;
}
smpl_t aubio_parameter_get_current_value ( const aubio_parameter_t * s )
{
return s->current_value;
}
smpl_t aubio_parameter_get_next_value ( aubio_parameter_t * s )
{
if ( ABS(s->current_value - s->target_value) > ABS(s->increment) ) {
s->current_value += s->increment;
} else {
s->current_value = s->target_value;
}
return s->current_value;
}
uint_t aubio_parameter_set_steps ( aubio_parameter_t * param, uint_t steps )
{
if (steps < AUBIO_PARAM_MIN_STEPS || steps > AUBIO_PARAM_MAX_STEPS) {
return AUBIO_FAIL;
}
param->steps = steps;
param->increment = ( param->target_value - param->current_value ) / param->steps;
return AUBIO_OK;
}
uint_t aubio_parameter_get_steps ( const aubio_parameter_t * param )
{
return param->steps;
}
uint_t aubio_parameter_set_min_value ( aubio_parameter_t * param, smpl_t min_value )
{
param->min_value = min_value;
return AUBIO_OK;
}
smpl_t aubio_parameter_get_min_value ( const aubio_parameter_t * param )
{
return param->min_value;
}
uint_t aubio_parameter_set_max_value ( aubio_parameter_t * param, smpl_t max_value )
{
param->max_value = max_value;
return AUBIO_OK;
}
smpl_t aubio_parameter_get_max_value ( const aubio_parameter_t * param )
{
return param->max_value;
}
void del_aubio_parameter ( aubio_parameter_t * param )
{
AUBIO_FREE(param);
}
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