Delegate BPMBeatProcedure

User defined callback function, to get the Beat position in seconds.

Example
A very simple way to count the BPM in real-time, using only 2 beats.

double prevBeatPos; // previous beat position in seconds
double bpm; // the bpm 

void BeatProcGetBPM(int handle, double beatpos, IntPtr user)
{
    if (beatpos != prevBeatPos)
        bpm = 60 / (beatpos - prevBeatPos); // calculate the bpm

    prevBeatPos = beatpos; // save current beat position
}

Get the detection progress in percents:

var progress = 100 * (beatpos - startpos) / (endpos - startpos);

Namespace: System.Dynamic.ExpandoObject

Assembly: ManagedBass.Fx.dll

Syntax

public delegate void BPMBeatProcedure(int Channel, double BeatPosition, IntPtr User);

Parameters

Int32 Channel Handle that the BPMBeatCallbackSet(Int32, BPMBeatProcedure, IntPtr) or BPMBeatDecodeGet(Int32, Double, Double, BassFlags, BPMBeatProcedure, IntPtr) has applied to.

Double BeatPosition The exact beat position in seconds.

IntPtr User The user instance data given when BPMBeatCallbackSet(Int32, BPMBeatProcedure, IntPtr) or BPMBeatDecodeGet(Int32, Double, Double, BassFlags, BPMBeatProcedure, IntPtr) was called.