public void SetBufferFloatData(
IALBuffer buffer,
IntPtr data,
int offset,
int count
)
{
OpenALBuffer buf = buffer as OpenALBuffer;
AL10.alBufferData(
buf.Handle,
XNAToFloat[buf.Channels],
data + (offset * 4),
count * 4,
buf.SampleRate
);
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
}
public IALBuffer ConvertStereoToMono(IALBuffer buffer)
{
OpenALBuffer buf = buffer as OpenALBuffer;
int bufLen, bits;
AL10.alGetBufferi(
buf.Handle,
AL10.AL_SIZE,
out bufLen
);
AL10.alGetBufferi(
buf.Handle,
AL10.AL_BITS,
out bits
);
bits /= 8;
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
byte[] data = new byte[bufLen];
GCHandle dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
IntPtr dataPtr = dataHandle.AddrOfPinnedObject();
ALEXT.alGetBufferSamplesSOFT(
buf.Handle,
0,
bufLen / bits / 2,
ALEXT.AL_STEREO_SOFT,
bits == 2 ? ALEXT.AL_SHORT_SOFT : ALEXT.AL_BYTE_SOFT,
dataPtr
);
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
byte[] monoData = new byte[bufLen / 2];
GCHandle monoHandle = GCHandle.Alloc(monoData, GCHandleType.Pinned);
IntPtr monoPtr = monoHandle.AddrOfPinnedObject();
unsafe
{
if (bits == 2)
{
short *src = (short *)dataPtr;
short *dst = (short *)monoPtr;
for (int i = 0; i < monoData.Length / 2; i += 1)
{
dst[i] = (short)(((int)src[0] + (int)src[1]) / 2);
src += 2;
}
}
else
{
sbyte *src = (sbyte *)dataPtr;
sbyte *dst = (sbyte *)monoPtr;
for (int i = 0; i < monoData.Length; i += 1)
{
dst[i] = (sbyte)(((short)src[0] + (short)src[1]) / 2);
src += 2;
}
}
}
monoHandle.Free();
dataHandle.Free();
data = null;
return(GenBuffer(
monoData,
(uint)buf.SampleRate,
1,
0,
0,
false,
(uint)bits - 1
));
}
public unsafe IALBuffer ConvertStereoToMono(IALBuffer buffer)
{
OpenALBuffer buf = buffer as OpenALBuffer;
int bufLen, bits;
AL10.alGetBufferi(
buf.Handle,
AL10.AL_SIZE,
out bufLen
);
AL10.alGetBufferi(
buf.Handle,
AL10.AL_BITS,
out bits
);
bits /= 8;
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
byte[] data = new byte[bufLen];
byte[] monoData = new byte[bufLen / 2];
fixed(byte *dataPtr = &data[0])
fixed(byte *monoPtr = &monoData[0])
{
ALEXT.alGetBufferSamplesSOFT(
buf.Handle,
0,
bufLen / bits / 2,
ALEXT.AL_STEREO_SOFT,
bits == 2 ? ALEXT.AL_SHORT_SOFT : ALEXT.AL_BYTE_SOFT,
(IntPtr)dataPtr
);
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
if (bits == 2)
{
short *src = (short *)dataPtr;
short *dst = (short *)monoPtr;
for (int i = 0; i < monoData.Length / 2; i += 1)
{
dst[i] = (short)(((int)src[0] + (int)src[1]) / 2);
src += 2;
}
}
else
{
sbyte *src = (sbyte *)dataPtr;
sbyte *dst = (sbyte *)monoPtr;
for (int i = 0; i < monoData.Length; i += 1)
{
dst[i] = (sbyte)(((short)src[0] + (short)src[1]) / 2);
src += 2;
}
}
}
return(GenBuffer(
monoData,
(uint)buf.SampleRate,
1,
0,
0,
false,
(uint)bits - 1
));
}
