AUD_Buffer.cpp

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/*
 * ***** 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_Buffer.h"
#include "AUD_Space.h"

#include <cstring>
#include <cstdlib>

#define AUD_ALIGN(a) (a + 16 - ((long)a & 15))

AUD_Buffer::AUD_Buffer(int size)
{
    m_size = size;
    m_buffer = (data_t*) malloc(size+16);
}

AUD_Buffer::~AUD_Buffer()
{
    free(m_buffer);
}

sample_t* AUD_Buffer::getBuffer() const
{
    return (sample_t*) AUD_ALIGN(m_buffer);
}

int AUD_Buffer::getSize() const
{
    return m_size;
}

void AUD_Buffer::resize(int size, bool keep)
{
    if(keep)
    {
        data_t* buffer = (data_t*) malloc(size + 16);

        memcpy(AUD_ALIGN(buffer), AUD_ALIGN(m_buffer), AUD_MIN(size, m_size));

        free(m_buffer);
        m_buffer = buffer;
    }
    else
        m_buffer = (data_t*) realloc(m_buffer, size + 16);

    m_size = size;
}

void AUD_Buffer::assureSize(int size, bool keep)
{
    if(m_size < size)
        resize(size, keep);
}