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-rw-r--r--src/libmad/timer.c485
1 files changed, 0 insertions, 485 deletions
diff --git a/src/libmad/timer.c b/src/libmad/timer.c
index 4b909aba9..e69de29bb 100644
--- a/src/libmad/timer.c
+++ b/src/libmad/timer.c
@@ -1,485 +0,0 @@
-/*
- * libmad - MPEG audio decoder library
- * Copyright (C) 2000-2004 Underbit Technologies, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- * $Id: timer.c,v 1.18 2004/01/23 09:41:33 rob Exp $
- */
-
-# ifdef HAVE_CONFIG_H
-# include "config.h"
-# endif
-
-# include "global.h"
-
-# include <stdio.h>
-
-# ifdef HAVE_ASSERT_H
-# include <assert.h>
-# endif
-
-# include "timer.h"
-
-mad_timer_t const mad_timer_zero = { 0, 0 };
-
-/*
- * NAME: timer->compare()
- * DESCRIPTION: indicate relative order of two timers
- */
-int mad_timer_compare(mad_timer_t timer1, mad_timer_t timer2)
-{
- signed long diff;
-
- diff = timer1.seconds - timer2.seconds;
- if (diff < 0)
- return -1;
- else if (diff > 0)
- return +1;
-
- diff = timer1.fraction - timer2.fraction;
- if (diff < 0)
- return -1;
- else if (diff > 0)
- return +1;
-
- return 0;
-}
-
-/*
- * NAME: timer->negate()
- * DESCRIPTION: invert the sign of a timer
- */
-void mad_timer_negate(mad_timer_t *timer)
-{
- timer->seconds = -timer->seconds;
-
- if (timer->fraction) {
- timer->seconds -= 1;
- timer->fraction = MAD_TIMER_RESOLUTION - timer->fraction;
- }
-}
-
-/*
- * NAME: timer->abs()
- * DESCRIPTION: return the absolute value of a timer
- */
-mad_timer_t mad_timer_abs(mad_timer_t timer)
-{
- if (timer.seconds < 0)
- mad_timer_negate(&timer);
-
- return timer;
-}
-
-/*
- * NAME: reduce_timer()
- * DESCRIPTION: carry timer fraction into seconds
- */
-static
-void reduce_timer(mad_timer_t *timer)
-{
- timer->seconds += timer->fraction / MAD_TIMER_RESOLUTION;
- timer->fraction %= MAD_TIMER_RESOLUTION;
-}
-
-/*
- * NAME: gcd()
- * DESCRIPTION: compute greatest common denominator
- */
-static
-unsigned long gcd(unsigned long num1, unsigned long num2)
-{
- unsigned long tmp;
-
- while (num2) {
- tmp = num2;
- num2 = num1 % num2;
- num1 = tmp;
- }
-
- return num1;
-}
-
-/*
- * NAME: reduce_rational()
- * DESCRIPTION: convert rational expression to lowest terms
- */
-static
-void reduce_rational(unsigned long *numer, unsigned long *denom)
-{
- unsigned long factor;
-
- factor = gcd(*numer, *denom);
-
- assert(factor != 0);
-
- *numer /= factor;
- *denom /= factor;
-}
-
-/*
- * NAME: scale_rational()
- * DESCRIPTION: solve numer/denom == ?/scale avoiding overflowing
- */
-static
-unsigned long scale_rational(unsigned long numer, unsigned long denom,
- unsigned long scale)
-{
- reduce_rational(&numer, &denom);
- reduce_rational(&scale, &denom);
-
- assert(denom != 0);
-
- if (denom < scale)
- return numer * (scale / denom) + numer * (scale % denom) / denom;
- if (denom < numer)
- return scale * (numer / denom) + scale * (numer % denom) / denom;
-
- return numer * scale / denom;
-}
-
-/*
- * NAME: timer->set()
- * DESCRIPTION: set timer to specific (positive) value
- */
-void mad_timer_set(mad_timer_t *timer, unsigned long seconds,
- unsigned long numer, unsigned long 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->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->multiply()
- * DESCRIPTION: multiply a timer by a scalar value
- */
-void mad_timer_multiply(mad_timer_t *timer, signed long scalar)
-{
- mad_timer_t addend;
- unsigned long factor;
-
- factor = scalar;
- if (scalar < 0) {
- factor = -scalar;
- mad_timer_negate(timer);
- }
-
- addend = *timer;
- *timer = mad_timer_zero;
-
- while (factor) {
- if (factor & 1)
- mad_timer_add(timer, addend);
-
- mad_timer_add(&addend, addend);
- factor >>= 1;
- }
-}
-
-/*
- * NAME: timer->count()
- * DESCRIPTION: return timer value in selected units
- */
-signed long mad_timer_count(mad_timer_t timer, enum mad_units units)
-{
- switch (units) {
- case MAD_UNITS_HOURS:
- return timer.seconds / 60 / 60;
-
- case MAD_UNITS_MINUTES:
- return timer.seconds / 60;
-
- case MAD_UNITS_SECONDS:
- return timer.seconds;
-
- case MAD_UNITS_DECISECONDS:
- case MAD_UNITS_CENTISECONDS:
- case MAD_UNITS_MILLISECONDS:
-
- case MAD_UNITS_8000_HZ:
- case MAD_UNITS_11025_HZ:
- case MAD_UNITS_12000_HZ:
- case MAD_UNITS_16000_HZ:
- case MAD_UNITS_22050_HZ:
- case MAD_UNITS_24000_HZ:
- case MAD_UNITS_32000_HZ:
- case MAD_UNITS_44100_HZ:
- case MAD_UNITS_48000_HZ:
-
- case MAD_UNITS_24_FPS:
- case MAD_UNITS_25_FPS:
- case MAD_UNITS_30_FPS:
- case MAD_UNITS_48_FPS:
- case MAD_UNITS_50_FPS:
- case MAD_UNITS_60_FPS:
- case MAD_UNITS_75_FPS:
- return timer.seconds * (signed long) units +
- (signed long) scale_rational(timer.fraction, MAD_TIMER_RESOLUTION,
- units);
-
- case MAD_UNITS_23_976_FPS:
- case MAD_UNITS_24_975_FPS:
- case MAD_UNITS_29_97_FPS:
- case MAD_UNITS_47_952_FPS:
- case MAD_UNITS_49_95_FPS:
- case MAD_UNITS_59_94_FPS:
- return (mad_timer_count(timer, -units) + 1) * 1000 / 1001;
- }
-
- /* unsupported units */
- return 0;
-}
-
-/*
- * NAME: timer->fraction()
- * DESCRIPTION: return fractional part of timer in arbitrary terms
- */
-unsigned long mad_timer_fraction(mad_timer_t timer, unsigned long denom)
-{
- timer = mad_timer_abs(timer);
-
- switch (denom) {
- case 0:
- return timer.fraction ?
- MAD_TIMER_RESOLUTION / timer.fraction : MAD_TIMER_RESOLUTION + 1;
-
- case MAD_TIMER_RESOLUTION:
- return timer.fraction;
-
- default:
- return scale_rational(timer.fraction, MAD_TIMER_RESOLUTION, denom);
- }
-}
-
-/*
- * NAME: timer->string()
- * DESCRIPTION: write a string representation of a timer using a template
- */
-void mad_timer_string(mad_timer_t timer,
- char *dest, char const *format, enum mad_units units,
- enum mad_units fracunits, unsigned long subparts)
-{
- unsigned long hours, minutes, seconds, sub;
- unsigned int frac;
-
- timer = mad_timer_abs(timer);
-
- seconds = timer.seconds;
- frac = sub = 0;
-
- switch (fracunits) {
- case MAD_UNITS_HOURS:
- case MAD_UNITS_MINUTES:
- case MAD_UNITS_SECONDS:
- break;
-
- case MAD_UNITS_DECISECONDS:
- case MAD_UNITS_CENTISECONDS:
- case MAD_UNITS_MILLISECONDS:
-
- case MAD_UNITS_8000_HZ:
- case MAD_UNITS_11025_HZ:
- case MAD_UNITS_12000_HZ:
- case MAD_UNITS_16000_HZ:
- case MAD_UNITS_22050_HZ:
- case MAD_UNITS_24000_HZ:
- case MAD_UNITS_32000_HZ:
- case MAD_UNITS_44100_HZ:
- case MAD_UNITS_48000_HZ:
-
- case MAD_UNITS_24_FPS:
- case MAD_UNITS_25_FPS:
- case MAD_UNITS_30_FPS:
- case MAD_UNITS_48_FPS:
- case MAD_UNITS_50_FPS:
- case MAD_UNITS_60_FPS:
- case MAD_UNITS_75_FPS:
- {
- unsigned long denom;
-
- denom = MAD_TIMER_RESOLUTION / fracunits;
-
- frac = timer.fraction / denom;
- sub = scale_rational(timer.fraction % denom, denom, subparts);
- }
- break;
-
- case MAD_UNITS_23_976_FPS:
- case MAD_UNITS_24_975_FPS:
- case MAD_UNITS_29_97_FPS:
- case MAD_UNITS_47_952_FPS:
- case MAD_UNITS_49_95_FPS:
- case MAD_UNITS_59_94_FPS:
- /* drop-frame encoding */
- /* N.B. this is only well-defined for MAD_UNITS_29_97_FPS */
- {
- unsigned long frame, cycle, d, m;
-
- frame = mad_timer_count(timer, fracunits);
-
- cycle = -fracunits * 60 * 10 - (10 - 1) * 2;
-
- d = frame / cycle;
- m = frame % cycle;
- frame += (10 - 1) * 2 * d;
- if (m > 2)
- frame += 2 * ((m - 2) / (cycle / 10));
-
- frac = frame % -fracunits;
- seconds = frame / -fracunits;
- }
- break;
- }
-
- switch (units) {
- case MAD_UNITS_HOURS:
- minutes = seconds / 60;
- hours = minutes / 60;
-
- sprintf(dest, format,
- hours,
- (unsigned int) (minutes % 60),
- (unsigned int) (seconds % 60),
- frac, sub);
- break;
-
- case MAD_UNITS_MINUTES:
- minutes = seconds / 60;
-
- sprintf(dest, format,
- minutes,
- (unsigned int) (seconds % 60),
- frac, sub);
- break;
-
- case MAD_UNITS_SECONDS:
- sprintf(dest, format,
- seconds,
- frac, sub);
- break;
-
- case MAD_UNITS_23_976_FPS:
- case MAD_UNITS_24_975_FPS:
- case MAD_UNITS_29_97_FPS:
- case MAD_UNITS_47_952_FPS:
- case MAD_UNITS_49_95_FPS:
- case MAD_UNITS_59_94_FPS:
- if (fracunits < 0) {
- /* not yet implemented */
- sub = 0;
- }
-
- /* fall through */
-
- case MAD_UNITS_DECISECONDS:
- case MAD_UNITS_CENTISECONDS:
- case MAD_UNITS_MILLISECONDS:
-
- case MAD_UNITS_8000_HZ:
- case MAD_UNITS_11025_HZ:
- case MAD_UNITS_12000_HZ:
- case MAD_UNITS_16000_HZ:
- case MAD_UNITS_22050_HZ:
- case MAD_UNITS_24000_HZ:
- case MAD_UNITS_32000_HZ:
- case MAD_UNITS_44100_HZ:
- case MAD_UNITS_48000_HZ:
-
- case MAD_UNITS_24_FPS:
- case MAD_UNITS_25_FPS:
- case MAD_UNITS_30_FPS:
- case MAD_UNITS_48_FPS:
- case MAD_UNITS_50_FPS:
- case MAD_UNITS_60_FPS:
- case MAD_UNITS_75_FPS:
- sprintf(dest, format, mad_timer_count(timer, units), sub);
- break;
- }
-}
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