File size: 1,921 Bytes
4559903 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | /*
* Copyright (C) 2009-2014 Fabián C. Tommasini <fabian@tommasini.com.ar>
*
* 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 3 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, see http://www.gnu.org/licenses/.
*
*/
#include <stk/FileWvIn.h>
#include <cmath>
#include "soundsource.hpp"
#include "avrsexception.hpp"
namespace avrs
{
SoundSource::SoundSource(std::string filename)
: _filename(filename)
{
if (!_init())
throw AvrsException("Error creating SoundSource");
}
SoundSource::~SoundSource()
{
; // nothing to do
}
SoundSource::ptr_t SoundSource::create(std::string filename)
{
ptr_t p_tmp(new SoundSource(filename));
return p_tmp;
}
bool SoundSource::_init()
{
stk::FileWvIn in_wv(1000000, 1024);
bool retval = true;
try {
in_wv.openFile(_filename, false, true);
if (in_wv.channelsOut() > 1) // must be mono
{
ERROR("Number of channels greater than 1 for mono input");
retval = false;
}
_ir.resize(in_wv.getSize(), 0.0f);
avrs::sample_t max_value = 0.0f, abs_value;
// read and normalize
for (uint i = 0; i < in_wv.getSize(); i++)
{
_ir[i] = (avrs::sample_t) in_wv.tick();
abs_value = fabs(_ir[i]);
if (abs_value > max_value)
max_value = abs_value;
}
for (uint i = 0; i < in_wv.getSize(); i++)
{
_ir[i] /= max_value; // normalize
}
}
catch (stk::StkError &ex)
{
retval = false;
}
return retval;
}
} // namespace avrs
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