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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* Copyright 2009-2011 Jörg Hermann Müller
*
* This file is part of AudaSpace.
*
* Audaspace 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.
*
* AudaSpace 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 Audaspace; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file audaspace/intern/AUD_SinusReader.cpp
* \ingroup audaspaceintern
*/
#include "AUD_SinusReader.h"
#include <cmath>
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
AUD_SinusReader::AUD_SinusReader(float frequency, AUD_SampleRate sampleRate) :
m_frequency(frequency),
m_position(0),
m_sampleRate(sampleRate)
{
}
bool AUD_SinusReader::isSeekable() const
{
return true;
}
void AUD_SinusReader::seek(int position)
{
m_position = position;
}
int AUD_SinusReader::getLength() const
{
return -1;
}
int AUD_SinusReader::getPosition() const
{
return m_position;
}
AUD_Specs AUD_SinusReader::getSpecs() const
{
AUD_Specs specs;
specs.rate = m_sampleRate;
specs.channels = AUD_CHANNELS_MONO;
return specs;
}
void AUD_SinusReader::read(int& length, bool& eos, sample_t* buffer)
{
// fill with sine data
for(int i = 0; i < length; i++)
{
buffer[i] = sin((m_position + i) * 2 * M_PI * m_frequency / m_sampleRate);
}
m_position += length;
eos = false;
}
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