Loopp/src/timemanager.hxx

143 lines
3.1 KiB
C++

#ifndef LUPPP_TIME_H
#define LUPPP_TIME_H
#include <iostream>
#include <cstdio>
#include "buffers.hxx"
#include "eventhandler.hxx"
#include "observer/observer.hxx"
using namespace std;
// inherits from ObserverSubject
class TimeManager
{
public:
TimeManager():
fpb(120),
oldBeat(0)
{
tapTempoPos = 0;
tapTempo[0] = 0;
tapTempo[1] = 0;
tapTempo[2] = 0;
}
void setBpm(float bpm)
{
setFpb( 44100 / bpm * 60 );
}
void setFpb(float f)
{
fpb = f;
char buffer [50];
sprintf (buffer, "TM, setFpb() %i", int(f) );
EventGuiPrint e( buffer );
writeToGuiRingbuffer( &e );
for(uint i = 0; i < observers.size(); i++)
{
observers.at(i)->setFpb(fpb);
}
}
void registerObserver(Observer* o)
{
observers.push_back(o);
o->setFpb( fpb );
}
void tap()
{
if ( tapTempoPos < 3 )
{
tapTempo[tapTempoPos] = frame;
tapTempoPos++;
}
else
{
// calculate frames per tap
int tapFpb1 = tapTempo[1] - tapTempo[0];
int tapFpb2 = tapTempo[2] - tapTempo[1];
int average = (tapFpb1 + tapFpb2) / 2;
setFpb(average);
char buffer [50];
sprintf (buffer, "TM, tap() average = %i", average );
EventGuiPrint e( buffer );
writeToGuiRingbuffer( &e );
// reset, so next 3 taps restart process
tapTempoPos = 0;
}
}
void process(Buffers* buffers)
{
// tap tempo measurements
frame = buffers->transportFrame;
//int framesPerBeat = (int) buffers->samplerate / (bpm / 60.0);
// time signature?
buffers->transportPosition->beats_per_bar = 4;
buffers->transportPosition->beat_type = 4;
int beat = buffers->transportFrame / fpb;
//int beat = int(beat);
//int tick = int( (beatFloat - beat) * 1920 );
if ( beat != oldBeat )
{
// inform observers of new beat FIRST
for(uint i = 0; i < observers.size(); i++)
{
observers.at(i)->beat();
}
if ( beat % (int)buffers->transportPosition->beats_per_bar == 0 )
{
// inform observers of new bar SECOND
for(uint i = 0; i < observers.size(); i++) { observers.at(i)->bar(); }
buffers->transportPosition->bar++;
}
oldBeat = beat;
}
buffers->transportPosition->valid = JackPositionBBT;
buffers->transportPosition->tick += (buffers->nframes / buffers->samplerate);
buffers->transportPosition->beat = beat % 4;
buffers->transportPosition->tick = 0;
buffers->transportPosition->ticks_per_beat = 1920;
int bpm = int(buffers->samplerate * fpb / 60.0);
buffers->transportPosition->beats_per_minute = bpm;
}
private:
float fpb;
int oldBeat;
// tap tempo measurements
int frame;
int tapTempoPos;
int tapTempo[3];
std::vector<Observer*> observers;
};
#endif // LUPPP_TIME_H