private int MillisecondsInSound(CachedSound sound)
{
int sampleRatePerMillisecond = sound.WaveFormat.SampleRate / 1000;
float milliseconds = (sound.AudioData.Length / sampleRatePerMillisecond) / sound.WaveFormat.Channels;
return((int)Math.Round(milliseconds));
}
public int Read(float[] buffer, int offset, int count)
{
if (_soundIndex > _cachedSounds.Length - 1)
{
return(0);
}
long positionThisBuffer = 0;
CachedSound currentSound = _cachedSounds[_soundIndex];
// Copy sound
var availableSamples = Math.Max(currentSound.AudioData.Length - _position, 0);
var samplesToCopy = Math.Min(availableSamples, count);
if (availableSamples > 0)
{
Array.Copy(currentSound.AudioData, _position, buffer, offset, samplesToCopy);
_position += samplesToCopy;
positionThisBuffer += samplesToCopy;
}
// If the sound ended
if (availableSamples < count)
{
int soundDuration = MillisecondsInSound(currentSound);
int breakDuration = Math.Max(_millisecondsPerSound - soundDuration, 0);
int samplesInBreak = SamplesPerMillisecond(currentSound) * breakDuration;
long samplesInBreakPassed = _position - currentSound.AudioData.Length;
long samplesInBreakLeft = samplesInBreak - samplesInBreakPassed;
long breakLengthThisBuffer = 0;
if (samplesInBreakLeft > 0)
{
breakLengthThisBuffer = Math.Min(samplesInBreakLeft, count - samplesToCopy);
Array.Clear(buffer, (int)(offset + positionThisBuffer), (int)breakLengthThisBuffer);
_position += breakLengthThisBuffer;
positionThisBuffer += breakLengthThisBuffer;
}
if (breakLengthThisBuffer == samplesInBreakLeft)
{
// go to next sample
_soundIndex++;
_position = 0;
// add bytes from the next sample
positionThisBuffer += Read(buffer, (int)(offset + positionThisBuffer), (int)(count - positionThisBuffer));
}
}
return((int)positionThisBuffer);
}
private int SamplesPerMillisecond(CachedSound sound)
{
int sampleRatePerMillisecond = sound.WaveFormat.SampleRate / 1000;
return(sampleRatePerMillisecond * sound.WaveFormat.Channels);
}
public void PlaySound(CachedSound sound)
{
AddMixerInput(new CachedSoundSampleProvider(sound));
}
public CachedSoundSampleProvider(CachedSound cachedSound)
{
this._cachedSound = cachedSound;
}