104 lines
2.4 KiB
C++
104 lines
2.4 KiB
C++
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#ifndef LUPPP_TIME_H
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#define LUPPP_TIME_H
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#include <iostream>
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#include <cstdio>
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#include "buffers.hxx"
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#include "eventhandler.hxx"
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#include "observer/observer.hxx"
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using namespace std;
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// inherits from ObserverSubject
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class TimeManager
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{
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public:
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TimeManager():
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bpm(120),
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oldBeat(0)
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{
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}
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void setBpm(float b)
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{
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char buffer [50];
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sprintf (buffer, "%d", b);
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//printf ("[%s] is a string %d chars long\n",buffer,n);
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EventGuiPrint e( buffer );
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writeToGuiRingbuffer( &e );
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bpm = b;
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for(uint i = 0; i < observers.size(); i++)
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{
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observers.at(i)->setFpb(bpm);
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}
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}
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void registerObserver(Observer* o)
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{
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observers.push_back(o);
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int fpb = 44100 / bpm * 60;
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char buffer [50];
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sprintf (buffer, "TM, bpm = %i, fpb = %i", int(bpm), fpb );
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EventGuiPrint e( buffer );
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writeToGuiRingbuffer( &e );
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// triggers newly registered object to have bpm set
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o->setFpb( fpb );
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}
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void process(Buffers* buffers)
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{
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int framesPerBeat = (int) buffers->samplerate / (bpm / 60.0);
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// time signature?
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buffers->transportPosition->beats_per_bar = 4;
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buffers->transportPosition->beat_type = 4;
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int beat = buffers->transportFrame / framesPerBeat;
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//int beat = int(beat);
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//int tick = int( (beatFloat - beat) * 1920 );
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if ( beat != oldBeat )
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{
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// inform observers of new beat FIRST
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for(uint i = 0; i < observers.size(); i++)
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{
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observers.at(i)->beat();
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}
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if ( beat % (int)buffers->transportPosition->beats_per_bar == 0 )
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{
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// inform observers of new bar SECOND
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for(uint i = 0; i < observers.size(); i++) { observers.at(i)->bar(); }
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buffers->transportPosition->bar++;
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}
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oldBeat = beat;
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}
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buffers->transportPosition->valid = JackPositionBBT;
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buffers->transportPosition->tick += (buffers->nframes / buffers->samplerate);
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buffers->transportPosition->beat = beat % 4;
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buffers->transportPosition->tick = 0;
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buffers->transportPosition->ticks_per_beat = 1920;
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buffers->transportPosition->beats_per_minute = bpm;
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}
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private:
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float bpm;
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int oldBeat;
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std::vector<Observer*> observers;
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};
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#endif // LUPPP_TIME_H
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