BASS_FX_BPM_DecodeGet

BASS_FX_BPM_DecodeGet

Get the BPM value of a decoding channel.

float BASS_FX_BPM_DecodeGet( DWORD chan, double startSec, double endSec, DWORD minMaxBPM, DWORD flags, BPMPROGRESSPROC *proc, void *user);

Parameters

chan	Stream/music/wma/cd/any other supported add-on format using a decoding channel
startSec	Start detecting position in seconds
endSec	End detecting position in seconds
minMaxBPM	Set min & max bpm, e.g: MAKELONG(LOWORD.HIWORD), LO=Min, HI=Max. 0 = defaults 29/200
flags	BASS_FX_BPM_xxx or BASS_FX_FREESOURCE
proc	User defined function to receive the detection progress in percents, use NULL if not in use
user	User instance data to pass to the callback function.

Return value
If successful, the original BPM value is returned, else -1 is returned. Use BASS_ErrorGetCode to get the error code.

Remarks
BASS_FX_BPM_BKGRND flag is supported only in Windows platforms.

Error codes

BASS_ERROR_HANDLE	chan is not valid
BASS_ERROR_DECODE	The chan is not a decoding channel. Make sure the chan was created using BASS_STREAM_DECODE / BASS_MUSIC_DECODE flag
BASS_ERROR_ILLPARAM	An illegal parameter was specified
BASS_ERROR_ALREADY	BPM detection, for this chan, is already being processed