/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            samplecache.cc
 *
 *  Fri Sep 19 19:36:13 CEST 2014
 *  Copyright 2014 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of SimpleRTP.
 *
 *  SimpleRTP 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.
 *
 *  SimpleRTP 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 SimpleRTP; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "samplecache.h"

#include <stdio.h>

SampleCache::SampleCache(size_t c)
{
  capacity = c;
  cache = new sample_t[capacity];
  start = 0;
  size = 0;
}

SampleCache::~SampleCache()
{
  delete[] cache;
}

void SampleCache::addSamples(sample_t *samples, size_t sz)
{
  for(size_t i = 0; i < sz; i++) {
    cache[(start + size) % capacity] = samples[i];
    size++;
  }
}

size_t SampleCache::getSamples(sample_t *samples, size_t sz)
{
  size_t read = 0;
  for(size_t i = 0; i < sz; i++) {
    if(!size) break;
    samples[i] = cache[start % capacity];
    read++;
    start++;
    size--;
  }

  start %= capacity;

  return read;
}

size_t SampleCache::cacheSize()
{
  return size;
}