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