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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_BufferReader.cpp
* \ingroup audaspaceintern
*/
#include "AUD_BufferReader.h"
#include "AUD_Buffer.h"
#include "AUD_Space.h"
#include <cstring>
AUD_BufferReader::AUD_BufferReader(boost::shared_ptr<AUD_Buffer> buffer,
AUD_Specs specs) :
m_position(0), m_buffer(buffer), m_specs(specs)
{
}
bool AUD_BufferReader::isSeekable() const
{
return true;
}
void AUD_BufferReader::seek(int position)
{
m_position = position;
}
int AUD_BufferReader::getLength() const
{
return m_buffer->getSize() / AUD_SAMPLE_SIZE(m_specs);
}
int AUD_BufferReader::getPosition() const
{
return m_position;
}
AUD_Specs AUD_BufferReader::getSpecs() const
{
return m_specs;
}
void AUD_BufferReader::read(int& length, bool& eos, sample_t* buffer)
{
eos = false;
int sample_size = AUD_SAMPLE_SIZE(m_specs);
sample_t* buf = m_buffer->getBuffer() + m_position * m_specs.channels;
// in case the end of the buffer is reached
if(m_buffer->getSize() < (m_position + length) * sample_size)
{
length = m_buffer->getSize() / sample_size - m_position;
eos = true;
}
if(length < 0)
{
length = 0;
return;
}
m_position += length;
memcpy(buffer, buf, length * sample_size);
}
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