Modules/SoundControl/GT2005SoundControl.cpp

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/**
* @file GT2005SoundControl.cpp
* 
* Implementation of class SoundControl.
*
* @author <a href="mailto:Oliver.Giese@uni-dortmund.de">Oliver Giese</a>
* @author <a href="mailto:matthias.hebbel@uni-dortmund.de">Matthias Hebbel</a>
*
*/
#include "GT2005SoundControl.h"
#include "Tools/Debugging/Debugging.h"


GT2005SoundControl::GT2005SoundControl(const SoundControlInterfaces& interfaces)
: SoundControl(interfaces)
{
  playingWave = false;
  actWavePosition = 0;
  lastSound = SoundRequest::none;

  for (int i = 0; i < SoundRequest::numOfSoundIDs; i++)
  {
    waveData[i] = 0;
    waveLength[i] = 0;
    if (i != (int) SoundRequest::none)
    {
      char file[20];
      strcpy(file,"Sounds/");
      strcat(file,(const char*)soundRequest.getSoundIDName((SoundRequest::SoundID)i));
      strcat(file,".wav");
      loadWavefile(file, i);
    }
  }
}


GT2005SoundControl::~GT2005SoundControl()
{
  for (int i = 0; i < SoundRequest::numOfSoundIDs; i++)
    if (waveData[i]) delete (waveData[i]);
}


void GT2005SoundControl::execute()
{
  if(playingWave) //occupied with playing wavesound
  {
    fillWaveBuffer(&soundData, lastSound);
  }
  else //open wavefile and play it
  {
    if ((soundRequest.soundID != SoundRequest::none) && 
        (soundRequest.soundID < SoundRequest::numOfSoundIDs) &&
        (soundRequest.soundID != lastSound))
    {
      playWave(&soundData, (int)soundRequest.soundID);
    }
    lastSound = soundRequest.soundID;
  }
}


void GT2005SoundControl::playWave(SoundData* soundData, int index)
{
  if (waveData[index])
  {
    playingWave = true;
    soundData->isInUse = true;
    actWavePosition = startWavePosition[index];
    fillWaveBuffer(soundData, index);
  }
}


bool GT2005SoundControl::loadWavefile(const char* filename, int index)
{
  InBinaryFile fin(filename);
  if (!fin.exists())
  {
    OUTPUT(idText,text,"GT2005SoundControl : Error, " << filename << " not found.");
    return false;
  }
  else
  {
    if (checkWaveHeader(filename, index))
    {
      waveData[index] = new char[waveLength[index]+startWavePosition[index]];
      fin.read(waveData[index],waveLength[index]+startWavePosition[index]);
      return true;
    }
  }
return false;
}


bool GT2005SoundControl::checkWaveHeader(const char* filename, int index)
{
  InBinaryFile fin(filename);
  int headerPos = 0;
  unsigned short format;
  unsigned long sampleRate;
  unsigned long bytesPerSecond;

  // load waveheader of maximum size
  fin.read(waveHeader, 100);

  // check waveformat
  if(strncmp(waveHeader,"RIFF",4)!=0)
  {
    OUTPUT(idText,text, "GT2005SoundControl : Error: " << filename << " is no RIFF file!");
    return false;
  }
  headerPos += 8;
  if(strncmp(waveHeader+headerPos,"WAVE",4)!=0)
  {
    OUTPUT(idText,text, "GT2005SoundControl : Error: " << filename << " is no WAVE file!");
    return false;
  }
  headerPos += 4;
  if(strncmp(waveHeader+headerPos,"fmt ",4)!=0)
  {
    OUTPUT(idText,text, "GT2005SoundControl : Error: " << filename << " has wrong subchunk fmt!");
    return false;
  }
  headerPos += 10;
  memcpy(&format,waveHeader+headerPos,2);
  if(format != 1)
  {
    OUTPUT(idText,text, "GT2005SoundControl : Error: " << filename << " is not mono!");
    return false;
  }
  headerPos += 2;
  memcpy(&sampleRate,waveHeader+headerPos,4);
  if(sampleRate != 8000)
  {
    OUTPUT(idText,text, "GT2005SoundControl : Error: " << filename << ": sample rate not 8000Hz!");
    return false;
  }
  headerPos += 4;
  memcpy(&bytesPerSecond,waveHeader+headerPos,4);
  if(bytesPerSecond != 8000)
  {
    OUTPUT(idText,text, "GT2005SoundControl : Error: " << filename << ": not 8000 bytes per second!");
    return false;
  }

  //find keyword "data"
  while ((headerPos < 97) && (strncmp(waveHeader+headerPos,"data",4)!=0))
  {
    headerPos+=2;
  }
  if (strncmp(waveHeader+headerPos,"data",4)!=0)
  {
    OUTPUT(idText,text, "GT2005SoundControl : Error: " << filename << ": 'data' not found!");
    return false;
  }
  memcpy(&waveLength[index],waveHeader+headerPos+4,4);
  startWavePosition[index] = headerPos + 8;

  return true;
}


void GT2005SoundControl::fillWaveBuffer(SoundData *soundData,int index)
{
  if(actWavePosition < waveLength[index] - 256)
  {
    memcpy(soundData->pcmBuffer, waveData[index] + actWavePosition, 256);
    // convert unsigned values to signed values
    for (int i=0; i < 256; i++)
    {
      soundData->pcmBuffer[i] = soundData->pcmBuffer[i] ^ 0x80;
    }
    actWavePosition += 256;
  }
  else
  {
    memset(soundData->pcmBuffer, 0, 256);
    playingWave = false;
    soundData->isInUse = false;
  }
}

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