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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* instrument.cc
*
* Tue Jul 22 17:14:20 CEST 2008
* Copyright 2008 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "instrument.h"
#include <stdlib.h>
#include <stdio.h>
#include "sample.h"
#include "configuration.h"
Instrument::Instrument()
{
mod = 1.0;
lastpos = 0;
}
Sample *Instrument::sample(level_t level, size_t pos)
{
if(Conf::enable_velocity_randomiser) {
float r = (float)rand() / (float)RAND_MAX; // random number: [0;1]
r -= 0.5; // random number [-0.5;0.5]
r *= Conf::velocity_randomiser_weight * 2; // ex. random number [-0.1;0.1]
level += r;
if(level > 1.0) level = 1.0;
if(level < 0.0) level = 0.0;
}
if(Conf::enable_velocity_modifier) {
mod += (pos - lastpos) / (44100.0 * Conf::velocity_modifier_falloff);
if(mod > 1.0) mod = 1.0;
}
// printf("Find level %f\n", level);
std::vector<Sample*> s = samples.get(level * mod);
if(s.size() == 0) return NULL;
size_t idx = rand()%(s.size());
if(Conf::enable_velocity_modifier) {
lastpos = pos;
mod *= Conf::velocity_modifier_weight;
}
return s[idx];
}
void Instrument::addSample(level_t a, level_t b, Sample *s)
{
samples.insert(a, b, s);
}
std::string Instrument::name()
{
return _name;
}
std::string Instrument::description()
{
return _description;
}
#ifdef TEST_INSTRUMENT
//deps: channel.cc sample.cc audiofile.cc
//cflags: $(SNDFILE_CFLAGS)
//libs: $(SNDFILE_LIBS)
#include "test.h"
TEST_BEGIN;
Instrument i("test");
Sample *a = new Sample();
i.addSample(0.0, 1.0, a);
Sample *b = new Sample();
i.addSample(0.0, 1.0, b);
Sample *c = new Sample();
i.addSample(1.5, 1.7, c);
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), a, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), b, "?");
TEST_EQUAL(i.sample(0.0), a, "?");
TEST_EQUAL(i.sample(0.0), a, "?");
TEST_EQUAL(i.sample(2.0), NULL, "?");
TEST_EQUAL(i.sample(1.6), c, "?");
TEST_EQUAL(i.sample(1.6), c, "?");
TEST_EQUAL(i.sample(1.6), c, "?");
TEST_END;
#endif/*TEST_INSTRUMENT*/
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