moTempo.cpp

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/*******************************************************************************

                              moTempo.cpp

  ****************************************************************************
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  *   This source is free software; you can redistribute it and/or modify    *
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  Copyright(C) 2006 Fabricio Costa

  Authors:
  Fabricio Costa


*******************************************************************************/

#include "moTempo.h"
#include "moMath.h"


moTempo::moTempo()  : moTimer() {
    Init();
}

moTempo::~moTempo() {
    Stop();
}

moTempo::moTempo( const moTempo &src) : moTimer() {
    (*this) = src;
}

moTempo&
moTempo::operator = (const moTempo &src) {

    (moTimer&)(*this)=(moTimer&)src;

    m_pFromTempo = src.m_pFromTempo;

    //version vieja
    ticks = src.ticks;
    ticks_0 = src.ticks_0;
    ticks_1 = src.ticks_1;

    //propio de moTempo
    syncro = src.syncro;
    delta = src.delta;
    deltaprevious = src.deltaprevious;
    factor = src.factor;
    //added for precise calculation
    ang = src.ang;

    beatpulsecount = src.beatpulsecount;
    return (*this);
}

MOboolean moTempo::Init() {
    ticks = 0;
    ticks_0 = 0;
    ticks_1 = 10000;

    syncro = 1.0;
    delta = 1.0;
    deltaprevious = 1.0;
    factor = 1.0;

    beatpulsecount = 0;
    m_pFromTempo = NULL;

  // siempre iniciamos encendiendo el timer
    Start();

    return true;
}

MOboolean moTempo::Init(MOdouble sync) {

    Init();

    syncro = sync;

    return true;
}

MOdouble moTempo::getPrincipalAngle() {

    MOdouble dx,dy;
    MOulong intv,modv,resv;

    MOdouble t0;

    //correcion para continuidad
    if(deltaprevious!=delta) {

        intv = ticks - ticks_0;
        modv = ticks_1 - ticks_0;

        modv =( modv == 0 ? 1 : modv );
        dy  =(double) 2.0 * moMathf::PI *(factor + deltaprevious - 1.0);
        dx  =(double) modv;
        ang =(double) intv * dy / dx;

        t0 = ticks - ang * modv /(2.0 * moMathf::PI *(factor + delta - 1.0) );

        //corregimos el ticks_0(desfazaje que fuerza el desplazamiento de la funcion para su continuidad)
        ticks_0 =(int) t0;
        ticks_1 =(int) t0 + modv;
        deltaprevious = delta;
    }


    intv = ticks - ticks_0;
    modv = ticks_1 - ticks_0;
    resv = intv % modv;
    dx =(double) resv /(double) modv;
    dy =(double) 2.0 * moMathf::PI *(factor + delta - 1.0);
    ang =(dx!=0.0 ? dy*dx : 0.0);
    ang*=syncro;
/*
    intv = ticks - ticks_0;
    modv = ticks_1 - ticks_0;
    modv =( modv == 0 ? 1 : modv );
    dy  =(double) 2.0 * pi *(factor + delta - 1.0);
    dx  =(double) modv;
    ang =(double) intv * dy / dx;
    ang *= syncro;
*/
    return (ang);
}

long moTempo::Duration() {
    //return moTimer::Duration();
    duration = moTimer::Duration();
    return duration;
}


MOdouble moTempo::getTempo() {

    MOdouble dx,dy;
    MOulong intv,modv;

    MOdouble t0;
/*
    intv = ticks - ticks_0;
    modv = ticks_1 - ticks_0 +(MOulong) delta;
    resv = intv % modv;
    dx =(double) resv /(double) modv;
    dy =(double) 2.0 * pi;
    ang =(dx!=0.0 ? factor*dy*dx : 0.0);
    ang*=syncro;
*/

    //correcion para continuidad
    if(deltaprevious!=delta) {

        ticks = duration;
        intv = ticks - ticks_0;
        modv = ticks_1 - ticks_0;



        modv =( modv == 0 ? 1 : modv );
        dy  =(double) 2.0 * moMathf::PI *(factor + deltaprevious - 1.0);
        dx  =(double) modv;
        ang =(double) intv * dy / dx;

        //t0 = ticks - ang * modv /(2.0 * moMathf::PI *(factor + delta - 1.0) );
        if ( (factor + delta - 1.0)!=0.0) {
      t0 = ticks - ang * modv /(2.0 * moMathf::PI *(factor + delta - 1.0) );
        } else t0 = ticks;


        //corregimos el ticks_0(desfazaje que fuerza el desplazamiento de la funcion para su continuidad)
        ticks_0 =(int) t0;
        ticks_1 =(int) t0 + modv;
        deltaprevious = delta;
    }

    ticks = duration;
    intv = ticks - ticks_0;

    modv = ticks_1 - ticks_0;
    modv =( modv == 0 ? 1 : modv );
    dy  =(double) 2.0 * moMathf::PI *(factor + delta - 1.0);
    dx  =(double) modv;
    ang =(double) intv * dy / dx;
    ang *= syncro;
    return (ang);
}

void moTempo::BeatPulse(MOulong tik) {
    //beatpulsecount0-> contando tiempo
    if(beatpulsecount==0 || tik-beat_0 > 10000) {      // si pasaron mas de 10' lo toma como el primer beat.
        //entra el primero
        beat_0 = tik;//vamos todavia
        beatpulsecount = 1;//pasamos a 1
    }
    else
    if(beatpulsecount==1) {
        beat_1 = tik;
        ticks_0 = beat_0;
        ticks_1 = beat_1;
        beatpulsecount = 0;//ya esta, lo tenemos, volvemos a cero
        delta = 1.0;//reiniciamos el delta, asi podemos resetearlo
    }
}

moTempo* moTempo::getFromTempo() {
    return m_pFromTempo;
}

void moTempo::SetFromTempo( moTempo *pfromtempo ) {
    m_pFromTempo = pfromtempo;
}

void moTempo::getInterpolatedTempo( MOfloat inter_value ) {//ivalue entre 0.0 y 1.0
    //aca se hace el calculointerpolado
    inter_value = 0 + inter_value;
}