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/*
* $Id$
*
* ***** BEGIN LGPL LICENSE BLOCK *****
*
* Copyright 2009 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 Lesser General Public License as published by
* the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with AudaSpace. If not, see <http://www.gnu.org/licenses/>.
*
* ***** END LGPL LICENSE BLOCK *****
*/
#include "AUD_BufferReader.h"
#include "AUD_Buffer.h"
#include "AUD_Space.h"
AUD_BufferReader::AUD_BufferReader(AUD_Reference<AUD_Buffer> buffer,
AUD_Specs specs)
{
m_position = 0;
m_buffer = buffer;
m_specs = specs;
}
bool AUD_BufferReader::isSeekable()
{
return true;
}
void AUD_BufferReader::seek(int position)
{
if(position < 0)
m_position = 0;
else if(position > m_buffer.get()->getSize() / AUD_SAMPLE_SIZE(m_specs))
m_position = m_buffer.get()->getSize() / AUD_SAMPLE_SIZE(m_specs);
else
m_position = position;
}
int AUD_BufferReader::getLength()
{
return m_buffer.get()->getSize()/AUD_SAMPLE_SIZE(m_specs);
}
int AUD_BufferReader::getPosition()
{
return m_position;
}
AUD_Specs AUD_BufferReader::getSpecs()
{
return m_specs;
}
AUD_ReaderType AUD_BufferReader::getType()
{
return AUD_TYPE_BUFFER;
}
bool AUD_BufferReader::notify(AUD_Message &message)
{
return false;
}
void AUD_BufferReader::read(int & length, sample_t* & buffer)
{
int sample_size = AUD_SAMPLE_SIZE(m_specs);
buffer = m_buffer.get()->getBuffer() + m_position * m_specs.channels;
// in case the end of the buffer is reached
if(m_buffer.get()->getSize() < (m_position + length) * sample_size)
length = m_buffer.get()->getSize() / sample_size - m_position;
if(length < 0)
length = 0;
m_position += length;
}
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