cannam@85: /*
cannam@85:  * libmad - MPEG audio decoder library
cannam@85:  * Copyright (C) 2000-2004 Underbit Technologies, Inc.
cannam@85:  *
cannam@85:  * This program is free software; you can redistribute it and/or modify
cannam@85:  * it under the terms of the GNU General Public License as published by
cannam@85:  * the Free Software Foundation; either version 2 of the License, or
cannam@85:  * (at your option) any later version.
cannam@85:  *
cannam@85:  * This program is distributed in the hope that it will be useful,
cannam@85:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@85:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@85:  * GNU General Public License for more details.
cannam@85:  *
cannam@85:  * You should have received a copy of the GNU General Public License
cannam@85:  * along with this program; if not, write to the Free Software
cannam@85:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
cannam@85:  *
cannam@85:  * $Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp $
cannam@85:  */
cannam@85: 
cannam@85: # ifndef LIBMAD_TIMER_H
cannam@85: # define LIBMAD_TIMER_H
cannam@85: 
cannam@85: typedef struct {
cannam@85:   signed long seconds;		/* whole seconds */
cannam@85:   unsigned long fraction;	/* 1/MAD_TIMER_RESOLUTION seconds */
cannam@85: } mad_timer_t;
cannam@85: 
cannam@85: extern mad_timer_t const mad_timer_zero;
cannam@85: 
cannam@85: # define MAD_TIMER_RESOLUTION	352800000UL
cannam@85: 
cannam@85: enum mad_units {
cannam@85:   MAD_UNITS_HOURS	 =    -2,
cannam@85:   MAD_UNITS_MINUTES	 =    -1,
cannam@85:   MAD_UNITS_SECONDS	 =     0,
cannam@85: 
cannam@85:   /* metric units */
cannam@85: 
cannam@85:   MAD_UNITS_DECISECONDS	 =    10,
cannam@85:   MAD_UNITS_CENTISECONDS =   100,
cannam@85:   MAD_UNITS_MILLISECONDS =  1000,
cannam@85: 
cannam@85:   /* audio sample units */
cannam@85: 
cannam@85:   MAD_UNITS_8000_HZ	 =  8000,
cannam@85:   MAD_UNITS_11025_HZ	 = 11025,
cannam@85:   MAD_UNITS_12000_HZ	 = 12000,
cannam@85: 
cannam@85:   MAD_UNITS_16000_HZ	 = 16000,
cannam@85:   MAD_UNITS_22050_HZ	 = 22050,
cannam@85:   MAD_UNITS_24000_HZ	 = 24000,
cannam@85: 
cannam@85:   MAD_UNITS_32000_HZ	 = 32000,
cannam@85:   MAD_UNITS_44100_HZ	 = 44100,
cannam@85:   MAD_UNITS_48000_HZ	 = 48000,
cannam@85: 
cannam@85:   /* video frame/field units */
cannam@85: 
cannam@85:   MAD_UNITS_24_FPS	 =    24,
cannam@85:   MAD_UNITS_25_FPS	 =    25,
cannam@85:   MAD_UNITS_30_FPS	 =    30,
cannam@85:   MAD_UNITS_48_FPS	 =    48,
cannam@85:   MAD_UNITS_50_FPS	 =    50,
cannam@85:   MAD_UNITS_60_FPS	 =    60,
cannam@85: 
cannam@85:   /* CD audio frames */
cannam@85: 
cannam@85:   MAD_UNITS_75_FPS	 =    75,
cannam@85: 
cannam@85:   /* video drop-frame units */
cannam@85: 
cannam@85:   MAD_UNITS_23_976_FPS	 =   -24,
cannam@85:   MAD_UNITS_24_975_FPS	 =   -25,
cannam@85:   MAD_UNITS_29_97_FPS	 =   -30,
cannam@85:   MAD_UNITS_47_952_FPS	 =   -48,
cannam@85:   MAD_UNITS_49_95_FPS	 =   -50,
cannam@85:   MAD_UNITS_59_94_FPS	 =   -60
cannam@85: };
cannam@85: 
cannam@85: # define mad_timer_reset(timer)	((void) (*(timer) = mad_timer_zero))
cannam@85: 
cannam@85: int mad_timer_compare(mad_timer_t, mad_timer_t);
cannam@85: 
cannam@85: # define mad_timer_sign(timer)	mad_timer_compare((timer), mad_timer_zero)
cannam@85: 
cannam@85: void mad_timer_negate(mad_timer_t *);
cannam@85: mad_timer_t mad_timer_abs(mad_timer_t);
cannam@85: 
cannam@85: void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
cannam@85: void mad_timer_add(mad_timer_t *, mad_timer_t);
cannam@85: void mad_timer_multiply(mad_timer_t *, signed long);
cannam@85: 
cannam@85: signed long mad_timer_count(mad_timer_t, enum mad_units);
cannam@85: unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
cannam@85: void mad_timer_string(mad_timer_t, char *, char const *,
cannam@85: 		      enum mad_units, enum mad_units, unsigned long);
cannam@85: 
cannam@85: # endif