apps/codecs/libmad/timer.h

   1 /*
   2  * libmad - MPEG audio decoder library
   3  * Copyright (C) 2000-2004 Underbit Technologies, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  *
  19  * $Id$
  20  */
  21
  22 # ifndef LIBMAD_TIMER_H
  23 # define LIBMAD_TIMER_H
  24
  25 typedef struct {
  26   signed long seconds;          /* whole seconds */
  27   unsigned long fraction;       /* 1/MAD_TIMER_RESOLUTION seconds */
  28 } mad_timer_t;
  29
  30 extern mad_timer_t const mad_timer_zero;
  31
  32 # define MAD_TIMER_RESOLUTION   352800000UL
  33
  34 enum mad_units {
  35   MAD_UNITS_HOURS        =    -2,
  36   MAD_UNITS_MINUTES      =    -1,
  37   MAD_UNITS_SECONDS      =     0,
  38
  39   /* metric units */
  40
  41   MAD_UNITS_DECISECONDS  =    10,
  42   MAD_UNITS_CENTISECONDS =   100,
  43   MAD_UNITS_MILLISECONDS =  1000,
  44
  45   /* audio sample units */
  46
  47   MAD_UNITS_8000_HZ      =  8000,
  48   MAD_UNITS_11025_HZ     = 11025,
  49   MAD_UNITS_12000_HZ     = 12000,
  50
  51   MAD_UNITS_16000_HZ     = 16000,
  52   MAD_UNITS_22050_HZ     = 22050,
  53   MAD_UNITS_24000_HZ     = 24000,
  54
  55   MAD_UNITS_32000_HZ     = 32000,
  56   MAD_UNITS_44100_HZ     = 44100,
  57   MAD_UNITS_48000_HZ     = 48000,
  58
  59   /* video frame/field units */
  60
  61   MAD_UNITS_24_FPS       =    24,
  62   MAD_UNITS_25_FPS       =    25,
  63   MAD_UNITS_30_FPS       =    30,
  64   MAD_UNITS_48_FPS       =    48,
  65   MAD_UNITS_50_FPS       =    50,
  66   MAD_UNITS_60_FPS       =    60,
  67
  68   /* CD audio frames */
  69
  70   MAD_UNITS_75_FPS       =    75,
  71
  72   /* video drop-frame units */
  73
  74   MAD_UNITS_23_976_FPS   =   -24,
  75   MAD_UNITS_24_975_FPS   =   -25,
  76   MAD_UNITS_29_97_FPS    =   -30,
  77   MAD_UNITS_47_952_FPS   =   -48,
  78   MAD_UNITS_49_95_FPS    =   -50,
  79   MAD_UNITS_59_94_FPS    =   -60
  80 };
  81
  82 # define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
  83
  84 int mad_timer_compare(mad_timer_t, mad_timer_t);
  85
  86 # define mad_timer_sign(timer)  mad_timer_compare((timer), mad_timer_zero)
  87
  88 void mad_timer_negate(mad_timer_t *);
  89 mad_timer_t mad_timer_abs(mad_timer_t);
  90
  91 void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
  92 void mad_timer_add(mad_timer_t *, mad_timer_t);
  93 void mad_timer_multiply(mad_timer_t *, signed long);
  94
  95 signed long mad_timer_count(mad_timer_t, enum mad_units);
  96 unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
  97 void mad_timer_string(mad_timer_t, char *, char const *,
  98                       enum mad_units, enum mad_units, unsigned long);
  99
 100 # endif