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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_DoubleReader.h"
#include <cstring>
static const char* specs_error = "AUD_DoubleReader: Both readers have to have "
"the same specs.";
AUD_DoubleReader::AUD_DoubleReader(AUD_IReader* reader1,
AUD_IReader* reader2) :
m_reader1(reader1), m_reader2(reader2), m_finished1(false)
{
AUD_Specs s1, s2;
s1 = reader1->getSpecs();
s2 = reader2->getSpecs();
if(memcmp(&s1, &s2, sizeof(AUD_Specs)) != 0)
{
delete reader1;
delete reader2;
AUD_THROW(AUD_ERROR_SPECS, specs_error);
}
}
AUD_DoubleReader::~AUD_DoubleReader()
{
delete m_reader1;
delete m_reader2;
}
bool AUD_DoubleReader::isSeekable() const
{
return m_reader1->isSeekable() && m_reader2->isSeekable();
}
void AUD_DoubleReader::seek(int position)
{
m_reader1->seek(position);
int pos1 = m_reader1->getPosition();
if((m_finished1 = (pos1 < position)))
m_reader2->seek(position - pos1);
else
m_reader2->seek(0);
}
int AUD_DoubleReader::getLength() const
{
int len1 = m_reader1->getLength();
int len2 = m_reader2->getLength();
if(len1 < 0 || len2 < 0)
return -1;
return len1 + len2;
}
int AUD_DoubleReader::getPosition() const
{
return m_reader1->getPosition() + m_reader2->getPosition();
}
AUD_Specs AUD_DoubleReader::getSpecs() const
{
return m_reader1->getSpecs();
}
void AUD_DoubleReader::read(int & length, sample_t* & buffer)
{
if(!m_finished1)
{
int len = length;
m_reader1->read(len, buffer);
if(len < length)
{
AUD_Specs specs = m_reader1->getSpecs();
int samplesize = AUD_SAMPLE_SIZE(specs);
if(m_buffer.getSize() < length * samplesize)
m_buffer.resize(length * samplesize);
sample_t* buf = buffer;
buffer = m_buffer.getBuffer();
memcpy(buffer, buf, len * samplesize);
len = length - len;
length -= len;
m_reader2->read(len, buf);
memcpy(buffer + length * specs.channels, buf,
len * samplesize);
length += len;
m_finished1 = true;
}
}
else
{
m_reader2->read(length, buffer);
}
}
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