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#include "common.h"
#include <math.h>
#include <stdlib.h>
#include "m_pd.h" // to post errors and debug messages
t_duration int2duration(int n)
{
t_duration dur;
int curr, i, j, ok, currden;
curr=0;
ok=0;
for (i=0; i<num_possible_denominators; i++)
{
currden = possible_denominators[i];
for (j=0; j<currden; j++)
{
if (curr==n)
{
dur.numerator=j;
dur.denominator=currden;
j=currden;
i=num_possible_denominators;
ok=1;
} else
curr++;
}
}
if (ok)
return dur;
else
{
dur.numerator=1;
dur.denominator=1;
return dur;
}
}
unsigned short int duration2int(t_duration dur)
{
unsigned short int curr, i, j;
curr=0;
for (i=0; i<num_possible_denominators; i++)
{
for (j=0; j<i; j++)
{
if ((dur.numerator==j) && (dur.denominator==i))
{
return curr;
} else
curr++;
}
}
return curr+1;
}
int possible_durations()
{
int ris, i;
ris = 0;
for (i=0; i<num_possible_denominators; i++)
{
ris += possible_denominators[i]-1;
}
ris += 1;
return ris;
}
t_duration float2duration(float fduration)
{
float minDiff, currfduration, currDiff;
int i, maxi;
t_duration currDur, bestDur;
bestDur.numerator=1;
bestDur.denominator=1;
minDiff = 1;
maxi = possible_durations();
for (i=0; i<maxi; i++)
{
// post("i=%i", i);
currDur = int2duration(i);
// post("currDur=%i/%i", currDur.numerator, currDur.denominator);
currfduration = duration2float(currDur);
// post("currfduration=%f", currfduration);
currDiff = (float) fabs(fduration - currfduration);
if (currDiff<=minDiff)
{
minDiff = currDiff;
bestDur = currDur;
}
}
return bestDur;
}
float duration2float(t_duration duration)
{
return (float) (((float)duration.numerator) / ((float)duration.denominator));
}
void setFirstBeat(t_rhythm_event **firstEvent, unsigned short int voice, float fduration)
{
t_duration res;
t_rhythm_event *newElement;
// convert from float to duration
res = float2duration(fduration);
// allocate a new element of the list
newElement = malloc(sizeof(t_rhythm_event));
// set the pointers
newElement->previous = 0;
newElement->next = 0;
newElement->voice=voice;
newElement->duration.numerator = res.numerator;
newElement->duration.denominator = res.denominator;
*firstEvent = newElement;
}
void concatenateBeat(t_rhythm_event *currentEvent, unsigned short int voice, float fduration)
{
t_duration res;
t_rhythm_event *newElement, *lastElement;
lastElement = currentEvent;
while(lastElement->next)
lastElement = lastElement->next;
// convert from float to duration
res = float2duration(fduration);
// allocate a new element of the list
newElement = (t_rhythm_event *) malloc(sizeof(t_rhythm_event));
// set the pointers
newElement->previous = lastElement;
newElement->next = 0;
lastElement->next = newElement;
newElement->voice=voice;
newElement->duration.numerator = res.numerator;
newElement->duration.denominator = res.denominator;
}
void freeBeats(t_rhythm_event *currentEvent)
{
t_rhythm_event *prev;
t_rhythm_event *next;
// go to the first element of the list
while(currentEvent->previous)
currentEvent = currentEvent->previous;
// now free each element
next=currentEvent->next;
do
{
prev = currentEvent;
next = currentEvent->next;
free(currentEvent);
} while(next);
}
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