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author | Avuton Olrich <avuton@gmail.com> | 2006-07-16 17:49:15 +0000 |
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committer | Avuton Olrich <avuton@gmail.com> | 2006-07-16 17:49:15 +0000 |
commit | 2001db8c18bcd949f189f324f297a0204515be07 (patch) | |
tree | 87da92edee5ba8f5c2cf7028fc88b6317ebed6bd /src/libmad/timer.c | |
parent | 939b40c45cce142e3e1127678088f5ded5ec3582 (diff) | |
download | mpd-2001db8c18bcd949f189f324f297a0204515be07.tar.gz mpd-2001db8c18bcd949f189f324f297a0204515be07.tar.xz mpd-2001db8c18bcd949f189f324f297a0204515be07.zip |
Remove hosted libid3tag & libmad
git-svn-id: https://svn.musicpd.org/mpd/trunk@4369 09075e82-0dd4-0310-85a5-a0d7c8717e4f
Diffstat (limited to '')
-rw-r--r-- | src/libmad/timer.c | 485 |
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; - } -} |