120 lines
2.7 KiB
C++
120 lines
2.7 KiB
C++
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/*
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* $Id$
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*
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* ***** BEGIN LGPL LICENSE BLOCK *****
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*
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* Copyright 2009 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 Lesser General Public License as published by
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* the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with AudaSpace. If not, see <http://www.gnu.org/licenses/>.
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*
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* ***** END LGPL LICENSE BLOCK *****
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*/
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#include "AUD_SRCResampleReader.h"
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#include "AUD_Buffer.h"
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#include <math.h>
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#include <cstring>
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#include <stdio.h>
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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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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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{
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m_sspecs = reader->getSpecs();
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if(m_sspecs.format != AUD_FORMAT_FLOAT32)
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{
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delete m_reader; AUD_DELETE("reader")
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AUD_THROW(AUD_ERROR_READER);
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}
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m_tspecs = specs;
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m_tspecs.channels = m_sspecs.channels;
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m_tspecs.format = m_sspecs.format;
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m_factor = (double)m_tspecs.rate / (double)m_sspecs.rate;
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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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delete m_reader; AUD_DELETE("reader")
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AUD_THROW(AUD_ERROR_READER);
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}
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m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
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}
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AUD_SRCResampleReader::~AUD_SRCResampleReader()
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{
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delete m_buffer; AUD_DELETE("buffer")
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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() / 4 / m_tspecs.channels;
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sample_t* buffer;
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m_reader->read(length, buffer);
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*data = (float*)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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}
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int AUD_SRCResampleReader::getLength()
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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()
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{
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return m_reader->getPosition() * m_factor;
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}
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AUD_Specs AUD_SRCResampleReader::getSpecs()
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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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if(m_buffer->getSize() < length * m_tspecs.channels * 4)
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m_buffer->resize(length * m_tspecs.channels * 4);
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buffer = m_buffer->getBuffer();
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length = src_callback_read(m_src, m_factor, length, (float*)buffer);
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}
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