102 lines
2.1 KiB
C++
102 lines
2.1 KiB
C++
/*
|
|
* ***** 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/FX/AUD_LoopReader.cpp
|
|
* \ingroup audfx
|
|
*/
|
|
|
|
|
|
#include "AUD_LoopReader.h"
|
|
#include "AUD_Buffer.h"
|
|
|
|
#include <cstring>
|
|
|
|
AUD_LoopReader::AUD_LoopReader(boost::shared_ptr<AUD_IReader> reader, int loop) :
|
|
AUD_EffectReader(reader), m_count(loop), m_left(loop)
|
|
{
|
|
}
|
|
|
|
void AUD_LoopReader::seek(int position)
|
|
{
|
|
int len = m_reader->getLength();
|
|
if(len < 0)
|
|
m_reader->seek(position);
|
|
else
|
|
{
|
|
if(m_count >= 0)
|
|
{
|
|
m_left = m_count - (position / len);
|
|
if(m_left < 0)
|
|
m_left = 0;
|
|
}
|
|
m_reader->seek(position % len);
|
|
}
|
|
}
|
|
|
|
int AUD_LoopReader::getLength() const
|
|
{
|
|
if(m_count < 0)
|
|
return -1;
|
|
return m_reader->getLength() * m_count;
|
|
}
|
|
|
|
int AUD_LoopReader::getPosition() const
|
|
{
|
|
return m_reader->getPosition() * (m_count < 0 ? 1 : m_count);
|
|
}
|
|
|
|
void AUD_LoopReader::read(int& length, bool& eos, sample_t* buffer)
|
|
{
|
|
const AUD_Specs specs = m_reader->getSpecs();
|
|
|
|
int len = length;
|
|
|
|
m_reader->read(length, eos, buffer);
|
|
|
|
if(length < len && eos && m_left)
|
|
{
|
|
int pos = length;
|
|
length = len;
|
|
|
|
while(pos < length && eos && m_left)
|
|
{
|
|
if(m_left > 0)
|
|
m_left--;
|
|
|
|
m_reader->seek(0);
|
|
|
|
len = length - pos;
|
|
m_reader->read(len, eos, buffer + pos * specs.channels);
|
|
|
|
// prevent endless loop
|
|
if(!len)
|
|
break;
|
|
|
|
pos += len;
|
|
}
|
|
|
|
length = pos;
|
|
}
|
|
}
|