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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_StreamBufferFactory.cpp
* \ingroup audaspaceintern
*/
#include "AUD_StreamBufferFactory.h"
#include "AUD_BufferReader.h"
#include "AUD_Buffer.h"
#include <cstring>
AUD_StreamBufferFactory::AUD_StreamBufferFactory(boost::shared_ptr<AUD_IFactory> factory) :
m_buffer(new AUD_Buffer())
{
boost::shared_ptr<AUD_IReader> reader = factory->createReader();
m_specs = reader->getSpecs();
int sample_size = AUD_SAMPLE_SIZE(m_specs);
int length;
int index = 0;
bool eos = false;
// get an approximated size if possible
int size = reader->getLength();
if(size <= 0)
size = AUD_BUFFER_RESIZE_BYTES / sample_size;
else
size += m_specs.rate;
// as long as the end of the stream is not reached
while(!eos)
{
// increase
m_buffer->resize(size*sample_size, true);
// read more
length = size-index;
reader->read(length, eos, m_buffer->getBuffer() + index * m_specs.channels);
if(index == m_buffer->getSize() / sample_size)
size += AUD_BUFFER_RESIZE_BYTES / sample_size;
index += length;
}
m_buffer->resize(index * sample_size, true);
}
boost::shared_ptr<AUD_IReader> AUD_StreamBufferFactory::createReader()
{
return boost::shared_ptr<AUD_IReader>(new AUD_BufferReader(m_buffer, m_specs));
}
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