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BizHawk
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better sound?

This commit is contained in:
zeromus 2011-02-05 21:25:58 +00:00
parent fe2b6568fc
commit d92a5f36ff
1 changed files with 41 additions and 18 deletions
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59
BizHawk.MultiClient/Sound.cs
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@ -70,23 +70,42 @@ namespace BizHawk.MultiClient
}
}
static int circularDist(int from, int to, int size)
{
if(size == 0)
return 0;
int diff = (to - from);
while(diff < 0)
diff += size;
return diff;
}
int soundoffset;
int SNDDXGetAudioSpace()
{
int playcursor = DSoundBuffer.CurrentPlayPosition;
int writecursor = DSoundBuffer.CurrentWritePosition;
int curToWrite = circularDist(soundoffset, writecursor, BufferSize);
int curToPlay = circularDist(soundoffset, playcursor, BufferSize);
if(curToWrite < curToPlay)
return 0; // in-between the two cursors. we shouldn't write anything during this time.
return curToPlay / 4;
}
public void UpdateSound(ISoundProvider soundProvider)
{
if (SoundEnabled == false || disposed)
return;
int PlayPos = DSoundBuffer.CurrentPlayPosition / 2;
int WritePos = SoundBufferPosition / 2;
int TargetPos = PlayPos + 2204;
int samplesNeeded = TargetPos - WritePos;
if (samplesNeeded < 0)
samplesNeeded += 8820;
if (samplesNeeded >= 8820)
samplesNeeded -= 8820;
int samplesNeeded = SNDDXGetAudioSpace()*2;
if (samplesNeeded == 0)
return;
short[] samples = new short[samplesNeeded];
//Console.WriteLine(samplesNeeded/2);
if (soundProvider != null && Muted == false)
{
@ -94,17 +113,21 @@ namespace BizHawk.MultiClient
semisync.GetSamples(samples);
}
for (int i = 0; i < samples.Length; i++)
{
short s = samples[i];
SoundBuffer[SoundBufferPosition++] = (byte)(s & 0xFF);
SoundBuffer[SoundBufferPosition++] = (byte)(s >> 8);
int cursor = soundoffset;
for (int i = 0; i < samples.Length; i++)
{
short s = samples[i];
SoundBuffer[cursor++] = (byte)(s & 0xFF);
SoundBuffer[cursor++] = (byte)(s >> 8);
if (SoundBufferPosition >= SoundBuffer.Length)
SoundBufferPosition = 0;
}
if (cursor >= SoundBuffer.Length)
cursor = 0;
}
DSoundBuffer.Write(SoundBuffer, 0, LockFlags.EntireBuffer);
soundoffset += samplesNeeded * 2;
soundoffset %= BufferSize;
}
}
}