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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
/*
Sonic Visualiser
An audio file viewer and annotation editor.
Centre for Digital Music, Queen Mary, University of London.
This file copyright 2006 Chris Cannam.
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. See the file
COPYING included with this distribution for more information.
*/
#include "MockWaveModel.h"
#include <cmath>
using namespace std;
MockWaveModel::MockWaveModel(vector<Sort> sorts, int length, int pad)
{
for (auto sort: sorts) {
m_data.push_back(generate(sort, length, pad));
}
}
floatvec_t
MockWaveModel::getData(int channel, sv_frame_t start, sv_frame_t count) const
{
sv_frame_t i = 0;
// cerr << "MockWaveModel::getData(" << channel << "," << start << "," << count << "): ";
floatvec_t data;
while (i < count) {
sv_frame_t idx = start + i;
if (!in_range_for(m_data[channel], idx)) break;
data.push_back(m_data[channel][idx]);
// cerr << data[i] << " ";
++i;
}
// cerr << endl;
return data;
}
vector<floatvec_t>
MockWaveModel::getMultiChannelData(int fromchannel, int tochannel,
sv_frame_t start, sv_frame_t count) const
{
vector<floatvec_t> data(tochannel - fromchannel + 1);
for (int c = fromchannel; c <= tochannel; ++c) {
data[c] = getData(c, start, count);
}
return data;
}
vector<float>
MockWaveModel::generate(Sort sort, int length, int pad) const
{
vector<float> data;
for (int i = 0; i < pad; ++i) {
data.push_back(0.f);
}
for (int i = 0; i < length; ++i) {
double v = 0.0;
switch (sort) {
case DC: v = 1.0; break;
case Sine: v = sin((2.0 * M_PI / 8.0) * i); break;
case Cosine: v = cos((2.0 * M_PI / 8.0) * i); break;
case Nyquist: v = (i % 2) * 2 - 1; break;
case Dirac: v = (i == 0) ? 1.0 : 0.0; break;
}
data.push_back(float(v));
}
for (int i = 0; i < pad; ++i) {
data.push_back(0.f);
}
return data;
}
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