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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* beatmapper.cc
*
* Fri Jul 25 11:17:42 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 "beatmapper.h"
#include <stdio.h>
#define DEF 2.0
BeatMapper::BeatMapper(Instrument *instrument)
{
this->instrument = instrument;
for(size_t i = 0; i < HISTORY_SIZE; i++) hist[i] = DEF;
C = 1.3;
mindist = 4;
last = mindist;
}
Sample *BeatMapper::map(jack_nframes_t nframes)
{
return NULL;
Sample *sample = NULL;
jack_default_audio_sample_t *buffer;
buffer = (jack_default_audio_sample_t *)jack_port_get_buffer(instrument->port, nframes);
float e = 0.0;
for(size_t i = 0; i < nframes; i++) {
e += buffer[i] * buffer[i];
}
float E = 0.0;
for(size_t i = 0; i < HISTORY_SIZE; i++) E += hist[i] / (float)HISTORY_SIZE;
if(E == 0) E = DEF; // We do not have a connection
// printf("last: %d, E: %f, e: %f - threshold: %f\n", last, E, e, 1.3 * E);
// Shift history and save new value
for(size_t i = 0; i < HISTORY_SIZE - 1; i++) hist[i] = hist[i+1];
hist[HISTORY_SIZE - 1] = e>DEF?e:DEF;
if(instrument->name == "hihat" && e > 0) printf("e: %f\n", e);
if(e > C * E && last > mindist) {
Velocity *v = instrument->getVelocity(127);
if(v) sample = v->getSample();
}
last++;
if(sample) last = 0;
return sample;
}
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