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// ------------------------------------------------------------------------
// linear-envelope.cpp: Linear envelope
// Copyright (C) 1999-2002,2005,2008 Kai Vehmanen
//
// Attributes:
// eca-style-version: 3 (see Ecasound Programmer's Guide)
//
// This program is fre 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
// ------------------------------------------------------------------------
#include <kvu_dbc.h>
#include <kvu_numtostr.h>
#include <kvu_message_item.h>
#include "linear-envelope.h"
#include "eca-logger.h"
LINEAR_ENVELOPE::LINEAR_ENVELOPE(void)
{
}
LINEAR_ENVELOPE::~LINEAR_ENVELOPE(void)
{
}
CONTROLLER_SOURCE::parameter_t LINEAR_ENVELOPE::value(double pos)
{
parameter_t retval;
/* note: position may go beyond stages_len_rep */
if (pos < stages_len_rep) {
retval = (pos / stages_len_rep);
}
else
retval = 1.0f;
return retval;
}
void LINEAR_ENVELOPE::init(void)
{
MESSAGE_ITEM otemp;
otemp << "Linear enveloped initialized; length ";
otemp.setprecision(3);
otemp << stages_len_rep;
otemp << " seconds.";
ECA_LOG_MSG(ECA_LOGGER::user_objects, otemp.to_string());
}
void LINEAR_ENVELOPE::set_parameter(int param, CONTROLLER_SOURCE::parameter_t value)
{
switch (param) {
case 1:
stages_len_rep = value;
break;
}
}
CONTROLLER_SOURCE::parameter_t LINEAR_ENVELOPE::get_parameter(int param) const
{
switch (param) {
case 1:
return stages_len_rep;
}
return 0.0;
}
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