blender/intern/audaspace/FX/AUD_DelayReader.cpp
Joerg Mueller 174eccf078 Huge new year audio commit!
* Refactored the whole audaspace library to use float as sample format over all readers.
* Added new Readers like the linear resampler, envelope, lowpass, highpass and butterworth.
* Note: The butterworth filter isn't working correctly, some bug in there... Maybe also true for the envelope.
* Added a sound to f-curve operator that behaves mostly like the soundtracker script of technoestupido.
2010-01-01 05:09:30 +00:00

107 lines
2.4 KiB
C++

/*
* $Id$
*
* ***** 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_DelayReader.h"
#include "AUD_Buffer.h"
#include <cstring>
AUD_DelayReader::AUD_DelayReader(AUD_IReader* reader, float delay) :
AUD_EffectReader(reader)
{
m_delay = (int)(delay * reader->getSpecs().rate);
m_remdelay = m_delay;
m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
}
AUD_DelayReader::~AUD_DelayReader()
{
delete m_buffer; AUD_DELETE("buffer")
}
void AUD_DelayReader::seek(int position)
{
if(position < 0)
return;
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()
{
int len = m_reader->getLength();
if(len < 0)
return len;
return len+m_delay;
}
int AUD_DelayReader::getPosition()
{
if(m_remdelay > 0)
return m_delay-m_remdelay;
return m_reader->getPosition() + m_delay;
}
void AUD_DelayReader::read(int & length, sample_t* & buffer)
{
if(m_remdelay > 0)
{
AUD_Specs specs = m_reader->getSpecs();
int samplesize = AUD_SAMPLE_SIZE(specs);
if(m_buffer->getSize() < length * samplesize)
m_buffer->resize(length * samplesize);
if(length > m_remdelay)
{
memset(m_buffer->getBuffer(), 0, m_remdelay * samplesize);
int len = length - m_remdelay;
m_reader->read(len, buffer);
memcpy(m_buffer->getBuffer() + m_remdelay * specs.channels,
buffer, len * samplesize);
if(len < length-m_remdelay)
length = m_remdelay + len;
m_remdelay = 0;
}
else
{
memset(m_buffer->getBuffer(), 0, length * samplesize);
m_remdelay -= length;
}
buffer = m_buffer->getBuffer();
}
else
m_reader->read(length, buffer);
}