97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
/*
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* Author: Harry van Haaren 2013
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* harryhaaren@gmail.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef LOOPP_TIME_H
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#define LOOPP_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 "transport.hxx"
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#include "eventhandler.hxx"
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#include "observer/time.hxx"
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using namespace std;
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class TimeManager
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{
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public:
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TimeManager();
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double getFpb();
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void queueBpmChange(float bpm);
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void queueBpmChangeZeroOne(float bpm);
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void queueFpbChange(double f);
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void setFpb(double f);
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/// add a component to be updated for time events
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void registerObserver(TimeObserver* o);
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/// call this when a tempo-tap occurs
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void tap();
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/// called to process buffers->nframes samples. If a beat is present, this
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/// is handled gracefully, first calling process up to the beat, then doing
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/// a beat() event on all TimeObservers, and processing the remaining samples
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void process(Buffers* buffers);
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/// returns the number of samples till beat if a beat exists in this process
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/// Otherwise returns nframes
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int getNframesToBeat();
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/// TRANSPORT_STATE is defined in transport.hxx
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void setTransportState( TRANSPORT_STATE s );
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int getBeatCounter() {
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return beatCounter;
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}
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private:
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int samplerate;
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/// the "state" of the transport: rolling or stopped
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TRANSPORT_STATE transportState;
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/// number of frames per beat
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double _fpb;
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double _nextFpb;
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/// holds the number of frames processed
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long long totalFrameCounter;
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/// frame number of the last beat
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long previousBeat;
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long beatFrameCountdown;
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/// counts bars / beats processed
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int barCounter;
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int beatCounter;
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int tapTempoPos;
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long long tapTempo[3];
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bool _bpmChangeQueued = false;
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std::vector<TimeObserver*> observers;
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};
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#endif // LOOPP_TIME_H
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