FSOUND_DSP_MixBuffers

Allows the user to mix their own data from one buffer to another, using FSOUNDs optimized
mixer routines. This was mainly provided for DSP routines, though it can be used for
anything.

signed char F_API FSOUND_DSP_MixBuffers(
void *destbuffer,
void *srcbuffer,
int len,
int freq,
int vol,
int pan,
unsigned int mode
);

Parameters

destbuffer	Pointer to a buffer to have the data mixed into.
srcbuffer	Pointer to the source buffer to be mixed in.
len	Amount to mix in SAMPLES.
freq	Speed to mix data to output buffer. Remember if you mix at a rate different than the output rate, the buffer lengths will have to be different to compensate. Ie if the output rate is 44100 and you supply a value of 88200 to FSOUND_DSP_MixBuffers, you will only need a destbuffer that is half the size of srcbuffer. If you supply a value of 22050 then you will need a destbuffer that is twice as big as srcbuffer. If they are both the same size then it will only mix half of the data.
vol	volume scalar value of mix. Valid values are 0 (silence) to 255 (full volume). See FSOUND_SetVolume for more information.
pan	pan value for data being mixed. Valid values are 0 (full left), 128 (middle), 255 (full right) and FSOUND_STEREOPAN. See FSOUND_SetPan for more information.
mode	Bit settings to describe the source buffer. Valid values are found in FSOUND_MODES, but only 8/16bit and stereo/mono flags are interpreted, other flags are ignored.

Return Value

On success, TRUE is returned.
On failure, FALSE is returned.

Remarks

'destbuffer' should always the format of the mixing output buffer, as it will use the mixer
currently running to do the mixing.
For MMX it is 16bit stereo, so it is 4 bytes per output sample (word left, word right)
For Standard Blend mode it is 32bit stereo, so it is 8 bytes per output sample (left dword, right dword)
For FPU mixer it is 32bit float stereo, so it is 8 bytes per output sample (left float, right float)
FSOUND_GetMixer can be used to determine which mixer is being used.
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Supported on the following platforms : Win32, WinCE, Linux, Macintosh, XBox, GameCube

[API function]