public IALBuffer GenBuffer(
byte[] data,
uint sampleRate,
uint channels,
uint loopStart,
uint loopEnd,
bool isADPCM,
uint formatParameter
)
{
uint result;
// Generate the buffer now, in case we need to perform alBuffer ops.
AL10.alGenBuffers(1, out result);
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
int format;
int length = data.Length;
if (isADPCM)
{
format = (channels == 2) ?
ALEXT.AL_FORMAT_STEREO_MSADPCM_SOFT :
ALEXT.AL_FORMAT_MONO_MSADPCM_SOFT;
AL10.alBufferi(
result,
ALEXT.AL_UNPACK_BLOCK_ALIGNMENT_SOFT,
(int)formatParameter
);
}
else
{
if (formatParameter == 1)
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO16:
AL10.AL_FORMAT_MONO16;
/* We have to perform extra data validation on
* PCM16 data, as the MS SoundEffect builder will
* leave extra bytes at the end which will confuse
* alBufferData and throw an AL_INVALID_VALUE.
* -flibit
*/
length &= 0x7FFFFFFE;
}
else
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO8:
AL10.AL_FORMAT_MONO8;
}
}
// Load it!
AL10.alBufferData(
result,
format,
data,
length,
(int)sampleRate
);
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
// Calculate the duration now, after we've unpacked the buffer
int bufLen, bits;
AL10.alGetBufferi(
result,
AL10.AL_SIZE,
out bufLen
);
AL10.alGetBufferi(
result,
AL10.AL_BITS,
out bits
);
if (bufLen == 0 || bits == 0)
{
throw new InvalidOperationException(
"OpenAL buffer allocation failed!"
);
}
TimeSpan resultDur = TimeSpan.FromSeconds(
bufLen /
(bits / 8) /
channels /
((double)sampleRate)
);
// Set the loop points, if applicable
if (loopStart > 0 || loopEnd > 0)
{
AL10.alBufferiv(
result,
ALEXT.AL_LOOP_POINTS_SOFT,
new int[]
{
(int)loopStart,
(int)loopEnd
}
);
}
#if VERBOSE_AL_DEBUGGING
CheckALError();
#endif
// Finally.
return(new OpenALBuffer(result, resultDur, (int)channels, (int)sampleRate));
}
public IALBuffer GenBuffer(
byte[] data,
uint sampleRate,
uint channels,
uint loopStart,
uint loopEnd,
bool isADPCM,
uint formatParameter
)
{
uint result;
// Generate the buffer now, in case we need to perform alBuffer ops.
AL10.alGenBuffers((IntPtr)1, out result);
int format;
if (isADPCM)
{
format = (channels == 2) ?
ALEXT.AL_FORMAT_STEREO_MSADPCM_SOFT :
ALEXT.AL_FORMAT_MONO_MSADPCM_SOFT;
AL10.alBufferi(
result,
ALEXT.AL_UNPACK_BLOCK_ALIGNMENT_SOFT,
(int)formatParameter
);
}
else
{
if (formatParameter == 1)
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO16:
AL10.AL_FORMAT_MONO16;
}
else
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO8:
AL10.AL_FORMAT_MONO8;
}
}
// Load it!
AL10.alBufferData(
result,
format,
data,
(IntPtr)data.Length,
(IntPtr)sampleRate
);
// Calculate the duration now, after we've unpacked the buffer
int bufLen, bits;
AL10.alGetBufferi(
result,
AL10.AL_SIZE,
out bufLen
);
AL10.alGetBufferi(
result,
AL10.AL_BITS,
out bits
);
TimeSpan resultDur = TimeSpan.FromSeconds(
bufLen /
(bits / 8) /
channels /
((double)sampleRate)
);
// Set the loop points, if applicable
if (loopStart > 0 || loopEnd > 0)
{
AL10.alBufferiv(
result,
ALEXT.AL_LOOP_POINTS_SOFT,
new int[]
{
(int)loopStart,
(int)loopEnd
}
);
}
// Finally.
return(new OpenALBuffer(result, resultDur));
}
private void INTERNAL_bufferData(
byte[] data,
uint sampleRate,
uint channels,
uint loopStart,
uint loopEnd,
bool isADPCM,
uint formatParameter
)
{
if (OpenALDevice.Instance == null)
{
throw new NoAudioHardwareException();
}
// Generate the buffer now, in case we need to perform alBuffer ops.
AL10.alGenBuffers((IntPtr)1, out INTERNAL_buffer);
int format;
if (isADPCM)
{
format = (channels == 2) ?
ALEXT.AL_FORMAT_STEREO_MSADPCM_SOFT :
ALEXT.AL_FORMAT_MONO_MSADPCM_SOFT;
AL10.alBufferi(
INTERNAL_buffer,
ALEXT.AL_UNPACK_BLOCK_ALIGNMENT_SOFT,
(int)formatParameter
);
}
else
{
if (formatParameter == 1)
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO16:
AL10.AL_FORMAT_MONO16;
}
else
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO8:
AL10.AL_FORMAT_MONO8;
}
}
// Load it!
AL10.alBufferData(
INTERNAL_buffer,
format,
data,
(IntPtr)data.Length,
(IntPtr)sampleRate
);
// Calculate the duration now, after we've unpacked the buffer
int bufLen, bits;
AL10.alGetBufferi(
INTERNAL_buffer,
AL10.AL_SIZE,
out bufLen
);
AL10.alGetBufferi(
INTERNAL_buffer,
AL10.AL_BITS,
out bits
);
Duration = TimeSpan.FromSeconds(
bufLen /
(bits / 8) /
channels /
((double)sampleRate)
);
// Set the loop points, if applicable
if (loopStart > 0 || loopEnd > 0)
{
AL10.alBufferiv(
INTERNAL_buffer,
ALEXT.AL_LOOP_POINTS_SOFT,
new int[]
{
(int)loopStart,
(int)loopEnd
}
);
}
}
private void INTERNAL_bufferData(
byte[] data,
uint sampleRate,
uint channels,
uint loopStart,
uint loopEnd,
bool isADPCM,
uint formatParameter
)
{
if (OpenALDevice.Instance == null)
{
throw new NoAudioHardwareException();
}
// Generate the buffer now, in case we need to perform alBuffer ops.
AL10.alGenBuffers((IntPtr)1, out INTERNAL_buffer);
int format;
if (isADPCM)
{
Platform.AssertSupported("ADPCM");
format = (channels == 2) ?
ALEXT.AL_FORMAT_STEREO_MSADPCM_SOFT :
ALEXT.AL_FORMAT_MONO_MSADPCM_SOFT;
AL10.alBufferi(
INTERNAL_buffer,
ALEXT.AL_UNPACK_BLOCK_ALIGNMENT_SOFT,
(int)formatParameter
);
}
else
{
if (formatParameter == 1)
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO16:
AL10.AL_FORMAT_MONO16;
}
else
{
format = (channels == 2) ?
AL10.AL_FORMAT_STEREO8:
AL10.AL_FORMAT_MONO8;
}
}
// Load it!
AL10.alBufferData(
INTERNAL_buffer,
format,
data,
(IntPtr)data.Length,
(IntPtr)sampleRate
);
// Calculate the duration now, after we've unpacked the buffer
int bufLen, bits;
AL10.alGetBufferi(
INTERNAL_buffer,
AL10.AL_SIZE,
out bufLen
);
AL10.alGetBufferi(
INTERNAL_buffer,
AL10.AL_BITS,
out bits
);
Duration = TimeSpan.FromSeconds(
bufLen /
(bits / 8) /
channels /
((double)sampleRate)
);
// Compute the default loop end point (end of the buffer), because
// some content builders automatically set a loop endpoint here instead of at 0
int defaultEndPoint = (bufLen / (bits / 8)) / (int)channels;
var hasCustomStartPoint = (loopStart > 0);
var hasCustomEndPoint = (
(loopEnd > loopStart) &&
(loopEnd < defaultEndPoint)
);
if (hasCustomStartPoint || hasCustomEndPoint)
{
// Set the loop points, if applicable
Platform.AssertSupported("CustomLoopPoints");
AL10.alBufferiv(
INTERNAL_buffer,
ALEXT.AL_LOOP_POINTS_SOFT,
new int[]
{
(int)loopStart,
(int)loopEnd
}
);
}
}