forked from bartvdbraak/blender
97 lines
2.2 KiB
C++
97 lines
2.2 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_DelayReader.cpp
|
|
* \ingroup audfx
|
|
*/
|
|
|
|
|
|
#include "AUD_DelayReader.h"
|
|
|
|
#include <cstring>
|
|
|
|
AUD_DelayReader::AUD_DelayReader(AUD_Reference<AUD_IReader> reader, float delay) :
|
|
AUD_EffectReader(reader),
|
|
m_delay(int(delay * reader->getSpecs().rate)),
|
|
m_remdelay(int(delay * reader->getSpecs().rate))
|
|
{
|
|
}
|
|
|
|
void AUD_DelayReader::seek(int position)
|
|
{
|
|
if(position < m_delay)
|
|
{
|
|
m_remdelay = m_delay - position;
|
|
m_reader->seek(0);
|
|
}
|
|
else
|
|
{
|
|
m_remdelay = 0;
|
|
m_reader->seek(position - m_delay);
|
|
}
|
|
}
|
|
|
|
int AUD_DelayReader::getLength() const
|
|
{
|
|
int len = m_reader->getLength();
|
|
if(len < 0)
|
|
return len;
|
|
return len + m_delay;
|
|
}
|
|
|
|
int AUD_DelayReader::getPosition() const
|
|
{
|
|
if(m_remdelay > 0)
|
|
return m_delay - m_remdelay;
|
|
return m_reader->getPosition() + m_delay;
|
|
}
|
|
|
|
void AUD_DelayReader::read(int& length, bool& eos, sample_t* buffer)
|
|
{
|
|
if(m_remdelay > 0)
|
|
{
|
|
AUD_Specs specs = m_reader->getSpecs();
|
|
int samplesize = AUD_SAMPLE_SIZE(specs);
|
|
|
|
if(length > m_remdelay)
|
|
{
|
|
memset(buffer, 0, m_remdelay * samplesize);
|
|
|
|
int len = length - m_remdelay;
|
|
m_reader->read(len, eos, buffer + m_remdelay * specs.channels);
|
|
|
|
length = m_remdelay + len;
|
|
|
|
m_remdelay = 0;
|
|
}
|
|
else
|
|
{
|
|
memset(buffer, 0, length * samplesize);
|
|
m_remdelay -= length;
|
|
}
|
|
}
|
|
else
|
|
m_reader->read(length, eos, buffer);
|
|
}
|