protected int ReadData(byte[] buffer, int bufferOffset, int length)
{
if (oggFile.EndOfFile)
{
return(0);
}
oggFile.criticalSection.Enter();
try
{
if (!IsSoundRealPlaying())
{
return(0);
}
int sourceLength = length;
if (oggFile.Sound3D && vorbisInfo.channels == 2)
{
sourceLength *= 2;
}
//suspended
//!!!!!норм EngineTime юзать?
double time = EngineApp.EngineTime;
if (time - oggFile.LastUpdateTime > .6f)
{
return(0);
}
//read from ogg
while (bufferSize < sourceLength)
{
oggFile.Decode(true, false);
if (oggFile.EndOfFile)
{
break;
}
}
if (bufferSize == 0)
{
return(0);
}
if (sourceLength > bufferSize)
{
sourceLength = bufferSize;
}
int returnLength = sourceLength;
//copy to channel buffer
if (oggFile.Sound3D && vorbisInfo.channels == 2)
{
unsafe
{
fixed(byte *source = samplesBuffer, destination = buffer)
{
ushort *s = (ushort *)source;
ushort *d = (ushort *)(destination + bufferOffset);
for (int n = 0; n < sourceLength; n += 4)
{
*d = *s;
d++;
s += 2;
}
}
}
returnLength = sourceLength / 2;
}
else
{
unsafe
{
fixed(byte *pSamplesBuffer = samplesBuffer, pBuffer = buffer)
{
NativeUtility.CopyMemory((IntPtr)(pBuffer + bufferOffset),
(IntPtr)pSamplesBuffer, sourceLength);
}
}
//Array.Copy( samplesBuffer, 0, buffer, bufferOffset, sourceLength );
}
//remove data from samplesBuffer
{
unsafe
{
fixed(byte *pSamplesBuffer = samplesBuffer)
{
NativeUtility.MoveMemory((IntPtr)pSamplesBuffer,
(IntPtr)(pSamplesBuffer + sourceLength), bufferSize - sourceLength);
}
}
//Array.Copy( samplesBuffer, sourceLength, samplesBuffer, 0, bufferSize - sourceLength );
bufferSize -= sourceLength;
}
return(returnLength);
}
catch (Exception ex)
{
Log.Error("OggFile: Exception: " + ex.ToString());
return(0);
}
finally
{
oggFile.criticalSection.Leave();
}
}