blob: 39f853174b5f7826760d0d5d8d645dce0667c320
| 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: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp $ |
| 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 |
| 101 |