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AUD_DoubleReader.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_DoubleReader.h"
#include "AUD_Buffer.h"

#include <cstring>

00031 AUD_DoubleReader::AUD_DoubleReader(AUD_IReader* reader1,
                                                   AUD_IReader* reader2) :
            m_reader1(reader1), m_reader2(reader2)
{
      try
      {
            if(!reader1)
                  AUD_THROW(AUD_ERROR_READER);

            if(!reader2)
                  AUD_THROW(AUD_ERROR_READER);

            AUD_Specs s1, s2;
            s1 = reader1->getSpecs();
            s2 = reader2->getSpecs();
            if(memcmp(&s1, &s2, sizeof(AUD_Specs)) != 0)
                  AUD_THROW(AUD_ERROR_READER);
      }

      catch(AUD_Exception)
      {
            if(reader1)
            {
                  delete reader1; AUD_DELETE("reader")
            }
            if(reader2)
            {
                  delete reader2; AUD_DELETE("reader")
            }

            throw;
      }

      m_buffer = new AUD_Buffer(); AUD_NEW("buffer")
      m_finished1 = false;
}

00068 AUD_DoubleReader::~AUD_DoubleReader()
{
      delete m_reader1; AUD_DELETE("reader")
      delete m_reader2; AUD_DELETE("reader")
      delete m_buffer; AUD_DELETE("buffer")
}

00075 bool AUD_DoubleReader::isSeekable()
{
      return false;
}

00080 void AUD_DoubleReader::seek(int position)
{
      int length1 = m_reader1->getLength();

      if(position < 0)
            position = 0;

      if(position < length1)
      {
            m_reader1->seek(position);
            m_reader2->seek(0);
            m_finished1 = false;
      }
      else
      {
            m_reader2->seek(position-length1);
            m_finished1 = true;
      }
}

00100 int AUD_DoubleReader::getLength()
{
      int len1 = m_reader1->getLength();
      int len2 = m_reader2->getLength();
      if(len1 < 0 || len2 < 0)
            return -1;
      return len1 + len2;
}

00109 int AUD_DoubleReader::getPosition()
{
      return m_reader1->getPosition() + m_reader2->getPosition();
}

00114 AUD_Specs AUD_DoubleReader::getSpecs()
{
      return m_reader1->getSpecs();
}

00119 AUD_ReaderType AUD_DoubleReader::getType()
{
      if(m_reader1->getType() == AUD_TYPE_BUFFER &&
         m_reader2->getType() == AUD_TYPE_BUFFER)
            return AUD_TYPE_BUFFER;
      return AUD_TYPE_STREAM;
}

00127 bool AUD_DoubleReader::notify(AUD_Message &message)
{
      return m_reader1->notify(message) | m_reader2->notify(message);
}

00132 void AUD_DoubleReader::read(int & length, sample_t* & buffer)
{
      if(!m_finished1)
      {
            int len = length;
            m_reader1->read(len, buffer);
            if(len < length)
            {
                  int samplesize = AUD_SAMPLE_SIZE(m_reader1->getSpecs());
                  if(m_buffer->getSize() < length * samplesize)
                        m_buffer->resize(length * samplesize);
                  memcpy(m_buffer->getBuffer(), buffer, len*samplesize);
                  len = length - len;
                  length -= len;
                  m_reader2->read(len, buffer);
                  memcpy(m_buffer->getBuffer() + length*samplesize,
                           buffer, len*samplesize);
                  length += len;
                  buffer = m_buffer->getBuffer();
                  m_finished1 = true;
            }
      }
      else
      {
            m_reader2->read(length, buffer);
      }
}

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