/*
* NAME: timer->add()
* DESCRIPTION: add one timer to another
*/
void mad_timer_add(mad_timer_t *timer, mad_timer_t incr)
{
timer->seconds += incr.seconds;
timer->fraction += incr.fraction;
if (timer->fraction >= MAD_TIMER_RESOLUTION)
reduce_timer(timer);
}
/*
* NAME: timer->set()
* DESCRIPTION: set timer to specific (positive) value
*/
void mad_timer_set(mad_timer_t *timer, u32 seconds,
u32 numer, u32 denom)
{
timer->seconds = seconds;
if (numer >= denom && denom > 0) {
timer->seconds += numer / denom;
numer %= denom;
}
switch (denom) {
case 0:
case 1:
timer->fraction = 0;
break;
case MAD_TIMER_RESOLUTION:
timer->fraction = numer;
break;
case 1000:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 1000);
break;
case 8000:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 8000);
break;
case 11025:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 11025);
break;
case 12000:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 12000);
break;
case 16000:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 16000);
break;
case 22050:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 22050);
break;
case 24000:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 24000);
break;
case 32000:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 32000);
break;
case 44100:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 44100);
break;
case 48000:
timer->fraction = numer * (MAD_TIMER_RESOLUTION / 48000);
break;
default:
timer->fraction = scale_rational(numer, denom, MAD_TIMER_RESOLUTION);
break;
}
if (timer->fraction >= MAD_TIMER_RESOLUTION)
reduce_timer(timer);
}
/*
* NAME: timer->set()
* DESCRIPTION: set timer to specific value
*/
void mad_timer_set(mad_timer_t *timer, unsigned long seconds,
unsigned long fraction, unsigned long fracparts)
{
timer->seconds = seconds;
if (fraction == 0)
fracparts = 0;
else if (fracparts == 0) {
fracparts = fraction;
fraction = 1;
}
switch (fracparts) {
case 0:
timer->fraction = 0;
break;
case MAD_TIMER_RESOLUTION:
timer->fraction = fraction;
break;
case 8000:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 8000);
break;
case 11025:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 11025);
break;
case 12000:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 12000);
break;
case 16000:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 16000);
break;
case 22050:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 22050);
break;
case 24000:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 24000);
break;
case 32000:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 32000);
break;
case 44100:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 44100);
break;
case 48000:
timer->fraction = fraction * (MAD_TIMER_RESOLUTION / 48000);
break;
default:
timer->fraction =
scale_rational(fraction, fracparts, MAD_TIMER_RESOLUTION);
break;
}
if (timer->fraction >= MAD_TIMER_RESOLUTION)
reduce_timer(timer);
}
