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AUD_ConverterReader.cpp

/*
 * $Id$
 *
 * ***** 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_ConverterReader.h"
#include "AUD_Buffer.h"

00029 AUD_ConverterReader::AUD_ConverterReader(AUD_IReader* reader, AUD_Specs specs) :
            AUD_EffectReader(reader)
{
      m_specs = reader->getSpecs();

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

      switch(m_specs.format)
      {
      case AUD_FORMAT_U8:
            switch(specs.format)
            {
            case AUD_FORMAT_U8:
                  m_convert = AUD_convert_copy<unsigned char>;
                  break;
            case AUD_FORMAT_S16:
                  m_convert = AUD_convert_u8_s16;
                  break;
            case AUD_FORMAT_S24:
                  if(bigendian)
                        m_convert = AUD_convert_u8_s24_be;
                  else
                        m_convert = AUD_convert_u8_s24_le;
                  break;
            case AUD_FORMAT_S32:
                  m_convert = AUD_convert_u8_s32;
                  break;
            case AUD_FORMAT_FLOAT32:
                  m_convert = AUD_convert_u8_float;
                  break;
            case AUD_FORMAT_FLOAT64:
                  m_convert = AUD_convert_u8_double;
                  break;
            default:
                  break;
            }
            break;
      case AUD_FORMAT_S16:
            switch(specs.format)
            {
            case AUD_FORMAT_U8:
                  m_convert = AUD_convert_s16_u8;
                  break;
            case AUD_FORMAT_S16:
                  m_convert = AUD_convert_copy<int16_t>;
                  break;
            case AUD_FORMAT_S24:
                  if(bigendian)
                        m_convert = AUD_convert_s16_s24_be;
                  else
                        m_convert = AUD_convert_s16_s24_le;
                  break;
            case AUD_FORMAT_S32:
                  m_convert = AUD_convert_s16_s32;
                  break;
            case AUD_FORMAT_FLOAT32:
                  m_convert = AUD_convert_s16_float;
                  break;
            case AUD_FORMAT_FLOAT64:
                  m_convert = AUD_convert_s16_double;
                  break;
            default:
                  break;
            }
            break;
      case AUD_FORMAT_S24:
            if(bigendian)
                  switch(specs.format)
                  {
                  case AUD_FORMAT_U8:
                        m_convert = AUD_convert_u8_s24_be;
                        break;
                  case AUD_FORMAT_S16:
                        m_convert = AUD_convert_s16_s24_be;
                        break;
                  case AUD_FORMAT_S24:
                        m_convert = AUD_convert_s24_s24;
                        break;
                  case AUD_FORMAT_S32:
                        m_convert = AUD_convert_s32_s24_be;
                        break;
                  case AUD_FORMAT_FLOAT32:
                        m_convert = AUD_convert_float_s24_be;
                        break;
                  case AUD_FORMAT_FLOAT64:
                        m_convert = AUD_convert_double_s24_be;
                        break;
                  default:
                        break;
                  }
            else
                  switch(specs.format)
                  {
                  case AUD_FORMAT_U8:
                        m_convert = AUD_convert_u8_s24_le;
                        break;
                  case AUD_FORMAT_S16:
                        m_convert = AUD_convert_s16_s24_le;
                        break;
                  case AUD_FORMAT_S24:
                        m_convert = AUD_convert_s24_s24;
                        break;
                  case AUD_FORMAT_S32:
                        m_convert = AUD_convert_s32_s24_le;
                        break;
                  case AUD_FORMAT_FLOAT32:
                        m_convert = AUD_convert_float_s24_le;
                        break;
                  case AUD_FORMAT_FLOAT64:
                        m_convert = AUD_convert_double_s24_le;
                        break;
                  default:
                        break;
                  }
            break;
      case AUD_FORMAT_S32:
            switch(specs.format)
            {
            case AUD_FORMAT_U8:
                  m_convert = AUD_convert_s32_u8;
                  break;
            case AUD_FORMAT_S16:
                  m_convert = AUD_convert_s32_s16;
                  break;
            case AUD_FORMAT_S24:
                  if(bigendian)
                        m_convert = AUD_convert_s32_s24_be;
                  else
                        m_convert = AUD_convert_s32_s24_le;
                  break;
            case AUD_FORMAT_S32:
                  m_convert = AUD_convert_copy<int32_t>;
                  break;
            case AUD_FORMAT_FLOAT32:
                  m_convert = AUD_convert_s32_float;
                  break;
            case AUD_FORMAT_FLOAT64:
                  m_convert = AUD_convert_s32_double;
                  break;
            default:
                  break;
            }
            break;
      case AUD_FORMAT_FLOAT32:
            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;
            }
            break;
      case AUD_FORMAT_FLOAT64:
            switch(specs.format)
            {
            case AUD_FORMAT_U8:
                  m_convert = AUD_convert_double_u8;
                  break;
            case AUD_FORMAT_S16:
                  m_convert = AUD_convert_double_s16;
                  break;
            case AUD_FORMAT_S24:
                  if(bigendian)
                        m_convert = AUD_convert_double_s24_be;
                  else
                        m_convert = AUD_convert_double_s24_le;
                  break;
            case AUD_FORMAT_S32:
                  m_convert = AUD_convert_double_s32;
                  break;
            case AUD_FORMAT_FLOAT32:
                  m_convert = AUD_convert_double_float;
                  break;
            case AUD_FORMAT_FLOAT64:
                  m_convert = AUD_convert_copy<double>;
                  break;
            default:
                  break;
            }
            break;
      default:
            break;
      }

      m_specs.format = specs.format;

      m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
}

00238 AUD_ConverterReader::~AUD_ConverterReader()
{
      delete m_buffer; AUD_DELETE("buffer")
}

00243 AUD_Specs AUD_ConverterReader::getSpecs()
{
      return m_specs;
}

00248 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(m_buffer->getBuffer(), buffer, length*m_specs.channels);

      buffer = m_buffer->getBuffer();
}

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