forked from bartvdbraak/blender
121 lines
2.7 KiB
C++
121 lines
2.7 KiB
C++
/*
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* $Id$
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*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* Copyright 2009-2011 Jörg Hermann Müller
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*
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* This file is part of AudaSpace.
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*
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* Audaspace is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* AudaSpace is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Audaspace; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file audaspace/SRC/AUD_SRCResampleReader.cpp
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* \ingroup audsrc
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*/
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#include "AUD_SRCResampleReader.h"
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#include <cmath>
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#include <cstring>
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#include <cstdio>
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static long src_callback(void *cb_data, float **data)
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{
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return ((AUD_SRCResampleReader*)cb_data)->doCallback(data);
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}
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static const char* state_error = "AUD_SRCResampleReader: SRC State couldn't be "
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"created.";
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AUD_SRCResampleReader::AUD_SRCResampleReader(AUD_IReader* reader,
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AUD_Specs specs) :
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AUD_EffectReader(reader),
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m_sspecs(reader->getSpecs()),
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m_factor(double(specs.rate) / double(m_sspecs.rate)),
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m_tspecs(specs),
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m_position(0)
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{
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m_tspecs.channels = m_sspecs.channels;
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int error;
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m_src = src_callback_new(src_callback,
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SRC_SINC_MEDIUM_QUALITY,
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m_sspecs.channels,
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&error,
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this);
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if(!m_src)
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{
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// XXX printf("%s\n", src_strerror(error));
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AUD_THROW(AUD_ERROR_SRC, state_error);
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}
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}
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AUD_SRCResampleReader::~AUD_SRCResampleReader()
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{
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src_delete(m_src);
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}
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long AUD_SRCResampleReader::doCallback(float** data)
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{
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int length = m_buffer.getSize() / AUD_SAMPLE_SIZE(m_tspecs);
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sample_t* buffer;
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m_reader->read(length, buffer);
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*data = buffer;
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return length;
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}
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void AUD_SRCResampleReader::seek(int position)
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{
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m_reader->seek(position / m_factor);
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src_reset(m_src);
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m_position = position;
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}
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int AUD_SRCResampleReader::getLength() const
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{
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return m_reader->getLength() * m_factor;
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}
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int AUD_SRCResampleReader::getPosition() const
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{
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return m_position;
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}
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AUD_Specs AUD_SRCResampleReader::getSpecs() const
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{
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return m_tspecs;
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}
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void AUD_SRCResampleReader::read(int & length, sample_t* & buffer)
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{
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int size = length * AUD_SAMPLE_SIZE(m_tspecs);
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if(m_buffer.getSize() < size)
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m_buffer.resize(size);
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buffer = m_buffer.getBuffer();
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length = src_callback_read(m_src, m_factor, length, buffer);
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m_position += length;
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}
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