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1 /*
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2 * libmad - MPEG audio decoder library
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3 * Copyright (C) 2000-2004 Underbit Technologies, Inc.
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4 *
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5 * This program is free software; you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation; either version 2 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18 *
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19 * $Id: timer.h,v 1.16 2004/01/23 09:41:33 rob Exp $
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20 */
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21
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22 # ifndef LIBMAD_TIMER_H
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23 # define LIBMAD_TIMER_H
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24
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25 typedef struct {
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26 signed long seconds; /* whole seconds */
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27 unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */
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28 } mad_timer_t;
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29
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30 extern mad_timer_t const mad_timer_zero;
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31
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32 # define MAD_TIMER_RESOLUTION 352800000UL
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33
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34 enum mad_units {
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35 MAD_UNITS_HOURS = -2,
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36 MAD_UNITS_MINUTES = -1,
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37 MAD_UNITS_SECONDS = 0,
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38
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39 /* metric units */
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40
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41 MAD_UNITS_DECISECONDS = 10,
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42 MAD_UNITS_CENTISECONDS = 100,
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43 MAD_UNITS_MILLISECONDS = 1000,
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44
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45 /* audio sample units */
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46
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47 MAD_UNITS_8000_HZ = 8000,
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48 MAD_UNITS_11025_HZ = 11025,
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49 MAD_UNITS_12000_HZ = 12000,
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50
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51 MAD_UNITS_16000_HZ = 16000,
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52 MAD_UNITS_22050_HZ = 22050,
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53 MAD_UNITS_24000_HZ = 24000,
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54
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55 MAD_UNITS_32000_HZ = 32000,
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56 MAD_UNITS_44100_HZ = 44100,
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57 MAD_UNITS_48000_HZ = 48000,
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58
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59 /* video frame/field units */
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60
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61 MAD_UNITS_24_FPS = 24,
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62 MAD_UNITS_25_FPS = 25,
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63 MAD_UNITS_30_FPS = 30,
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64 MAD_UNITS_48_FPS = 48,
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65 MAD_UNITS_50_FPS = 50,
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66 MAD_UNITS_60_FPS = 60,
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67
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68 /* CD audio frames */
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69
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70 MAD_UNITS_75_FPS = 75,
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71
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72 /* video drop-frame units */
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73
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74 MAD_UNITS_23_976_FPS = -24,
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75 MAD_UNITS_24_975_FPS = -25,
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76 MAD_UNITS_29_97_FPS = -30,
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77 MAD_UNITS_47_952_FPS = -48,
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78 MAD_UNITS_49_95_FPS = -50,
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79 MAD_UNITS_59_94_FPS = -60
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80 };
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81
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82 # define mad_timer_reset(timer) ((void) (*(timer) = mad_timer_zero))
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83
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84 int mad_timer_compare(mad_timer_t, mad_timer_t);
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85
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86 # define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero)
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87
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88 void mad_timer_negate(mad_timer_t *);
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89 mad_timer_t mad_timer_abs(mad_timer_t);
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90
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91 void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long);
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92 void mad_timer_add(mad_timer_t *, mad_timer_t);
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93 void mad_timer_multiply(mad_timer_t *, signed long);
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94
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95 signed long mad_timer_count(mad_timer_t, enum mad_units);
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96 unsigned long mad_timer_fraction(mad_timer_t, unsigned long);
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97 void mad_timer_string(mad_timer_t, char *, char const *,
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98 enum mad_units, enum mad_units, unsigned long);
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99
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100 # endif
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