/*
 * sturmbahnfahrer
 * (c) 2006 by Bram Stolk
 * bram at gmail.com
 * LICENSED ACCORDING TO THE GPL
 */

#include <assert.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

#include "soundclip.h"
#include "soundfeed.h"
#include "soundenginealsa.h"

static void low_pass_filter(short *data, int numframes, float f)
{
  static short prevs[2]={0,0};
  for (int i=0; i<numframes; i++)
  {
    short cur0 = data[2*i+0];
    data[2*i+0] = (short) ((1-f)*cur0 + f*prevs[0]);
    short cur1 = data[2*i+1];
    data[2*i+1] = (short) ((1-f)*cur1 + f*prevs[1]);
    prevs[0]=data[2*i+0];
    prevs[1]=data[2*i+1];
  }
}


SoundEngineAlsa::SoundEngineAlsa(int lag) :
  opened(false),
  simplefeed(0),
  complexfeed(0),
  enginefeed(0),
  activefeed(0),
  batchsize(0),
  framelag(lag),
  lpfilter(0.0)
{
}


SoundEngineAlsa::~SoundEngineAlsa()
{
}

 
void SoundEngineAlsa::Play(const std::string &fname, int delay, bool looping)
{
}


void SoundEngineAlsa::StopPlay(void)
{
  puts("NOT YET IMPLEMENTED");
}


void SoundEngineAlsa::SetMode(const std::string &modename)
{
}


void SoundEngineAlsa::SetModulation(float freq, float ampl)
{
}


void SoundEngineAlsa::SetLowPass(float f)
{
  lpfilter = f;
}



float SoundEngineAlsa::Sustain(void)
{
}

clipmap_t SoundClip::clips;

bool SoundClip::bigendian;