/// <summary>
/// Initializes a new instance of the <see cref="Sdl2Player"/> class.
/// </summary>
public Sdl2Player()
{
var inputDriver = new Sdl2InputDriver();
var graphicsDriver = new Sdl2GraphicsDriver();
var soundDriver = new PcmSoundDriver(new Sdl2SoundPcmDriver());
this.interpreter = new AgiInterpreter(inputDriver, graphicsDriver, soundDriver);
inputDriver.SetInterpreter(this.interpreter);
soundDriver.SetInterpreter(this.interpreter);
}
private int TonePcmCallback(ToneChannel ch, short[] buffer, int count)
{
int result = -1;
int index = 0;
while (count > 0)
{
if (ch.NoteCount <= 0)
{
// Get new tone data
Tone tone = new Tone();
tone.FrequencyCount = 0;
tone.Attenuation = 0x0f;
tone.Type = GenerateTone;
if (ch.Avail != 0 && this.interpreter.SoundManager.FillChannel(ch.AgiChannel, tone) == 0)
{
ch.Attenuation = tone.Attenuation;
ch.FreqCount = tone.FrequencyCount;
ch.GenType = tone.Type;
// setup counters 'n stuff
// 44100 samples per sec.. tone changes 60 times per sec
ch.NoteCount = 44100 / 60;
result = 0;
}
else
{
ch.GenType = GenerateSilence;
ch.NoteCount = count;
ch.Avail = 0;
}
}
// Write nothing
if (ch.FreqCount == 0 || ch.Attenuation == 0x0f)
{
ch.GenType = GenerateSilence;
}
// Find which is smaller, the buffer or the note count
int fillSize = ch.NoteCount < count ? ch.NoteCount : count;
switch (ch.GenType)
{
case GenerateTone:
fillSize = PcmSoundDriver.SquareFill(ch, buffer, index, fillSize);
break;
case GeneratePeriod:
case GenerateWhite:
fillSize = PcmSoundDriver.NoiseFill(ch, buffer, index, fillSize);
break;
case GenerateSilence:
default:
fillSize = PcmSoundDriver.SilenceFill(buffer, index, fillSize);
break;
}
ch.NoteCount -= fillSize;
count -= fillSize;
index += fillSize;
}
return(result);
}
