AUD_ConverterReader.cpp

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/*
 * $Id: AUD_ConverterReader.cpp 35141 2011-02-25 10:21:56Z jesterking $
 *
 * ***** 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 *****
 */

#include "AUD_ConverterReader.h"

AUD_ConverterReader::AUD_ConverterReader(AUD_IReader* reader,
                                                                                 AUD_DeviceSpecs specs) :
                AUD_EffectReader(reader)
{
        m_specs.specs = reader->getSpecs();

        int bigendian = 1;
        bigendian = (((char*)&bigendian)[0]) ? 0: 1; // 1 if Big Endian

        switch(specs.format)
        {
        case AUD_FORMAT_U8:
                m_convert = AUD_convert_float_u8;
                break;
        case AUD_FORMAT_S16:
                m_convert = AUD_convert_float_s16;
                break;
        case AUD_FORMAT_S24:
                if(bigendian)
                        m_convert = AUD_convert_float_s24_be;
                else
                        m_convert = AUD_convert_float_s24_le;
                break;
        case AUD_FORMAT_S32:
                m_convert = AUD_convert_float_s32;
                break;
        case AUD_FORMAT_FLOAT32:
                m_convert = AUD_convert_copy<float>;
                break;
        case AUD_FORMAT_FLOAT64:
                m_convert = AUD_convert_float_double;
                break;
        default:
                break;
        }

        m_specs.format = specs.format;
}

AUD_Specs AUD_ConverterReader::getSpecs() const
{
        return m_specs.specs;
}

void AUD_ConverterReader::read(int & length, sample_t* & buffer)
{
        m_reader->read(length, buffer);

        int samplesize = AUD_SAMPLE_SIZE(m_specs);

        if(m_buffer.getSize() < length * samplesize)
                m_buffer.resize(length * samplesize);

        m_convert((data_t*)m_buffer.getBuffer(), (data_t*)buffer,
                          length * m_specs.channels);

        buffer = m_buffer.getBuffer();
}