streo mp3 player see: http://mbed.org/users/okini3939/notebook/I2S_AUDIO
Dependencies: FatFileSystemCpp I2SSlave TLV320 mbed
Fork of madplayer by
timer.cpp@0:7627c79db971, 2010-11-26 (annotated)
- Committer:
- Gruenfrosch
- Date:
- Fri Nov 26 12:18:30 2010 +0000
- Revision:
- 0:7627c79db971
- Child:
- 2:f28cf0afd021
First Version
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Gruenfrosch | 0:7627c79db971 | 1 | /* |
Gruenfrosch | 0:7627c79db971 | 2 | * libmad - MPEG audio decoder library |
Gruenfrosch | 0:7627c79db971 | 3 | * Copyright (C) 2000-2004 Underbit Technologies, Inc. |
Gruenfrosch | 0:7627c79db971 | 4 | * |
Gruenfrosch | 0:7627c79db971 | 5 | * This program is free software; you can redistribute it and/or modify |
Gruenfrosch | 0:7627c79db971 | 6 | * it under the terms of the GNU General Public License as published by |
Gruenfrosch | 0:7627c79db971 | 7 | * the Free Software Foundation; either version 2 of the License, or |
Gruenfrosch | 0:7627c79db971 | 8 | * (at your option) any later version. |
Gruenfrosch | 0:7627c79db971 | 9 | * |
Gruenfrosch | 0:7627c79db971 | 10 | * This program is distributed in the hope that it will be useful, |
Gruenfrosch | 0:7627c79db971 | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
Gruenfrosch | 0:7627c79db971 | 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
Gruenfrosch | 0:7627c79db971 | 13 | * GNU General Public License for more details. |
Gruenfrosch | 0:7627c79db971 | 14 | * |
Gruenfrosch | 0:7627c79db971 | 15 | * You should have received a copy of the GNU General Public License |
Gruenfrosch | 0:7627c79db971 | 16 | * along with this program; if not, write to the Free Software |
Gruenfrosch | 0:7627c79db971 | 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
Gruenfrosch | 0:7627c79db971 | 18 | * |
Gruenfrosch | 0:7627c79db971 | 19 | * $Id: timer.c,v 1.1 2010/11/23 20:12:57 andy Exp $ |
Gruenfrosch | 0:7627c79db971 | 20 | */ |
Gruenfrosch | 0:7627c79db971 | 21 | |
Gruenfrosch | 0:7627c79db971 | 22 | # include "config.h" |
Gruenfrosch | 0:7627c79db971 | 23 | |
Gruenfrosch | 0:7627c79db971 | 24 | # include "global.h" |
Gruenfrosch | 0:7627c79db971 | 25 | |
Gruenfrosch | 0:7627c79db971 | 26 | # include <stdio.h> |
Gruenfrosch | 0:7627c79db971 | 27 | |
Gruenfrosch | 0:7627c79db971 | 28 | # ifdef HAVE_ASSERT_H |
Gruenfrosch | 0:7627c79db971 | 29 | # include <assert.h> |
Gruenfrosch | 0:7627c79db971 | 30 | # endif |
Gruenfrosch | 0:7627c79db971 | 31 | |
Gruenfrosch | 0:7627c79db971 | 32 | # include "timer.h" |
Gruenfrosch | 0:7627c79db971 | 33 | |
Gruenfrosch | 0:7627c79db971 | 34 | mad_timer_t const mad_timer_zero = { 0, 0 }; |
Gruenfrosch | 0:7627c79db971 | 35 | |
Gruenfrosch | 0:7627c79db971 | 36 | /* |
Gruenfrosch | 0:7627c79db971 | 37 | * NAME: timer->compare() |
Gruenfrosch | 0:7627c79db971 | 38 | * DESCRIPTION: indicate relative order of two timers |
Gruenfrosch | 0:7627c79db971 | 39 | */ |
Gruenfrosch | 0:7627c79db971 | 40 | int mad_timer_compare(mad_timer_t timer1, mad_timer_t timer2) |
Gruenfrosch | 0:7627c79db971 | 41 | { |
Gruenfrosch | 0:7627c79db971 | 42 | signed long diff; |
Gruenfrosch | 0:7627c79db971 | 43 | |
Gruenfrosch | 0:7627c79db971 | 44 | diff = timer1.seconds - timer2.seconds; |
Gruenfrosch | 0:7627c79db971 | 45 | if (diff < 0) |
Gruenfrosch | 0:7627c79db971 | 46 | return -1; |
Gruenfrosch | 0:7627c79db971 | 47 | else if (diff > 0) |
Gruenfrosch | 0:7627c79db971 | 48 | return +1; |
Gruenfrosch | 0:7627c79db971 | 49 | |
Gruenfrosch | 0:7627c79db971 | 50 | diff = timer1.fraction - timer2.fraction; |
Gruenfrosch | 0:7627c79db971 | 51 | if (diff < 0) |
Gruenfrosch | 0:7627c79db971 | 52 | return -1; |
Gruenfrosch | 0:7627c79db971 | 53 | else if (diff > 0) |
Gruenfrosch | 0:7627c79db971 | 54 | return +1; |
Gruenfrosch | 0:7627c79db971 | 55 | |
Gruenfrosch | 0:7627c79db971 | 56 | return 0; |
Gruenfrosch | 0:7627c79db971 | 57 | } |
Gruenfrosch | 0:7627c79db971 | 58 | |
Gruenfrosch | 0:7627c79db971 | 59 | /* |
Gruenfrosch | 0:7627c79db971 | 60 | * NAME: timer->negate() |
Gruenfrosch | 0:7627c79db971 | 61 | * DESCRIPTION: invert the sign of a timer |
Gruenfrosch | 0:7627c79db971 | 62 | */ |
Gruenfrosch | 0:7627c79db971 | 63 | void mad_timer_negate(mad_timer_t *timer) |
Gruenfrosch | 0:7627c79db971 | 64 | { |
Gruenfrosch | 0:7627c79db971 | 65 | timer->seconds = -timer->seconds; |
Gruenfrosch | 0:7627c79db971 | 66 | |
Gruenfrosch | 0:7627c79db971 | 67 | if (timer->fraction) { |
Gruenfrosch | 0:7627c79db971 | 68 | timer->seconds -= 1; |
Gruenfrosch | 0:7627c79db971 | 69 | timer->fraction = MAD_TIMER_RESOLUTION - timer->fraction; |
Gruenfrosch | 0:7627c79db971 | 70 | } |
Gruenfrosch | 0:7627c79db971 | 71 | } |
Gruenfrosch | 0:7627c79db971 | 72 | |
Gruenfrosch | 0:7627c79db971 | 73 | /* |
Gruenfrosch | 0:7627c79db971 | 74 | * NAME: timer->abs() |
Gruenfrosch | 0:7627c79db971 | 75 | * DESCRIPTION: return the absolute value of a timer |
Gruenfrosch | 0:7627c79db971 | 76 | */ |
Gruenfrosch | 0:7627c79db971 | 77 | mad_timer_t mad_timer_abs(mad_timer_t timer) |
Gruenfrosch | 0:7627c79db971 | 78 | { |
Gruenfrosch | 0:7627c79db971 | 79 | if (timer.seconds < 0) |
Gruenfrosch | 0:7627c79db971 | 80 | mad_timer_negate(&timer); |
Gruenfrosch | 0:7627c79db971 | 81 | |
Gruenfrosch | 0:7627c79db971 | 82 | return timer; |
Gruenfrosch | 0:7627c79db971 | 83 | } |
Gruenfrosch | 0:7627c79db971 | 84 | |
Gruenfrosch | 0:7627c79db971 | 85 | /* |
Gruenfrosch | 0:7627c79db971 | 86 | * NAME: reduce_timer() |
Gruenfrosch | 0:7627c79db971 | 87 | * DESCRIPTION: carry timer fraction into seconds |
Gruenfrosch | 0:7627c79db971 | 88 | */ |
Gruenfrosch | 0:7627c79db971 | 89 | static |
Gruenfrosch | 0:7627c79db971 | 90 | void reduce_timer(mad_timer_t *timer) |
Gruenfrosch | 0:7627c79db971 | 91 | { |
Gruenfrosch | 0:7627c79db971 | 92 | timer->seconds += timer->fraction / MAD_TIMER_RESOLUTION; |
Gruenfrosch | 0:7627c79db971 | 93 | timer->fraction %= MAD_TIMER_RESOLUTION; |
Gruenfrosch | 0:7627c79db971 | 94 | } |
Gruenfrosch | 0:7627c79db971 | 95 | |
Gruenfrosch | 0:7627c79db971 | 96 | /* |
Gruenfrosch | 0:7627c79db971 | 97 | * NAME: gcd() |
Gruenfrosch | 0:7627c79db971 | 98 | * DESCRIPTION: compute greatest common denominator |
Gruenfrosch | 0:7627c79db971 | 99 | */ |
Gruenfrosch | 0:7627c79db971 | 100 | static |
Gruenfrosch | 0:7627c79db971 | 101 | unsigned long gcd(unsigned long num1, unsigned long num2) |
Gruenfrosch | 0:7627c79db971 | 102 | { |
Gruenfrosch | 0:7627c79db971 | 103 | unsigned long tmp; |
Gruenfrosch | 0:7627c79db971 | 104 | |
Gruenfrosch | 0:7627c79db971 | 105 | while (num2) { |
Gruenfrosch | 0:7627c79db971 | 106 | tmp = num2; |
Gruenfrosch | 0:7627c79db971 | 107 | num2 = num1 % num2; |
Gruenfrosch | 0:7627c79db971 | 108 | num1 = tmp; |
Gruenfrosch | 0:7627c79db971 | 109 | } |
Gruenfrosch | 0:7627c79db971 | 110 | |
Gruenfrosch | 0:7627c79db971 | 111 | return num1; |
Gruenfrosch | 0:7627c79db971 | 112 | } |
Gruenfrosch | 0:7627c79db971 | 113 | |
Gruenfrosch | 0:7627c79db971 | 114 | /* |
Gruenfrosch | 0:7627c79db971 | 115 | * NAME: reduce_rational() |
Gruenfrosch | 0:7627c79db971 | 116 | * DESCRIPTION: convert rational expression to lowest terms |
Gruenfrosch | 0:7627c79db971 | 117 | */ |
Gruenfrosch | 0:7627c79db971 | 118 | static |
Gruenfrosch | 0:7627c79db971 | 119 | void reduce_rational(unsigned long *numer, unsigned long *denom) |
Gruenfrosch | 0:7627c79db971 | 120 | { |
Gruenfrosch | 0:7627c79db971 | 121 | unsigned long factor; |
Gruenfrosch | 0:7627c79db971 | 122 | |
Gruenfrosch | 0:7627c79db971 | 123 | factor = gcd(*numer, *denom); |
Gruenfrosch | 0:7627c79db971 | 124 | |
Gruenfrosch | 0:7627c79db971 | 125 | /* assert(factor != 0); */ |
Gruenfrosch | 0:7627c79db971 | 126 | |
Gruenfrosch | 0:7627c79db971 | 127 | *numer /= factor; |
Gruenfrosch | 0:7627c79db971 | 128 | *denom /= factor; |
Gruenfrosch | 0:7627c79db971 | 129 | } |
Gruenfrosch | 0:7627c79db971 | 130 | |
Gruenfrosch | 0:7627c79db971 | 131 | /* |
Gruenfrosch | 0:7627c79db971 | 132 | * NAME: scale_rational() |
Gruenfrosch | 0:7627c79db971 | 133 | * DESCRIPTION: solve numer/denom == ?/scale avoiding overflowing |
Gruenfrosch | 0:7627c79db971 | 134 | */ |
Gruenfrosch | 0:7627c79db971 | 135 | static |
Gruenfrosch | 0:7627c79db971 | 136 | unsigned long scale_rational(unsigned long numer, unsigned long denom, |
Gruenfrosch | 0:7627c79db971 | 137 | unsigned long scale) |
Gruenfrosch | 0:7627c79db971 | 138 | { |
Gruenfrosch | 0:7627c79db971 | 139 | reduce_rational(&numer, &denom); |
Gruenfrosch | 0:7627c79db971 | 140 | reduce_rational(&scale, &denom); |
Gruenfrosch | 0:7627c79db971 | 141 | |
Gruenfrosch | 0:7627c79db971 | 142 | /* assert(denom != 0);*/ |
Gruenfrosch | 0:7627c79db971 | 143 | |
Gruenfrosch | 0:7627c79db971 | 144 | if (denom < scale) |
Gruenfrosch | 0:7627c79db971 | 145 | return numer * (scale / denom) + numer * (scale % denom) / denom; |
Gruenfrosch | 0:7627c79db971 | 146 | if (denom < numer) |
Gruenfrosch | 0:7627c79db971 | 147 | return scale * (numer / denom) + scale * (numer % denom) / denom; |
Gruenfrosch | 0:7627c79db971 | 148 | |
Gruenfrosch | 0:7627c79db971 | 149 | return numer * scale / denom; |
Gruenfrosch | 0:7627c79db971 | 150 | } |
Gruenfrosch | 0:7627c79db971 | 151 | |
Gruenfrosch | 0:7627c79db971 | 152 | /* |
Gruenfrosch | 0:7627c79db971 | 153 | * NAME: timer->set() |
Gruenfrosch | 0:7627c79db971 | 154 | * DESCRIPTION: set timer to specific (positive) value |
Gruenfrosch | 0:7627c79db971 | 155 | */ |
Gruenfrosch | 0:7627c79db971 | 156 | void mad_timer_set(mad_timer_t *timer, unsigned long seconds, |
Gruenfrosch | 0:7627c79db971 | 157 | unsigned long numer, unsigned long denom) |
Gruenfrosch | 0:7627c79db971 | 158 | { |
Gruenfrosch | 0:7627c79db971 | 159 | timer->seconds = seconds; |
Gruenfrosch | 0:7627c79db971 | 160 | if (numer >= denom && denom > 0) { |
Gruenfrosch | 0:7627c79db971 | 161 | timer->seconds += numer / denom; |
Gruenfrosch | 0:7627c79db971 | 162 | numer %= denom; |
Gruenfrosch | 0:7627c79db971 | 163 | } |
Gruenfrosch | 0:7627c79db971 | 164 | |
Gruenfrosch | 0:7627c79db971 | 165 | switch (denom) { |
Gruenfrosch | 0:7627c79db971 | 166 | case 0: |
Gruenfrosch | 0:7627c79db971 | 167 | case 1: |
Gruenfrosch | 0:7627c79db971 | 168 | timer->fraction = 0; |
Gruenfrosch | 0:7627c79db971 | 169 | break; |
Gruenfrosch | 0:7627c79db971 | 170 | |
Gruenfrosch | 0:7627c79db971 | 171 | case MAD_TIMER_RESOLUTION: |
Gruenfrosch | 0:7627c79db971 | 172 | timer->fraction = numer; |
Gruenfrosch | 0:7627c79db971 | 173 | break; |
Gruenfrosch | 0:7627c79db971 | 174 | |
Gruenfrosch | 0:7627c79db971 | 175 | case 1000: |
Gruenfrosch | 0:7627c79db971 | 176 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 1000); |
Gruenfrosch | 0:7627c79db971 | 177 | break; |
Gruenfrosch | 0:7627c79db971 | 178 | |
Gruenfrosch | 0:7627c79db971 | 179 | case 8000: |
Gruenfrosch | 0:7627c79db971 | 180 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 8000); |
Gruenfrosch | 0:7627c79db971 | 181 | break; |
Gruenfrosch | 0:7627c79db971 | 182 | |
Gruenfrosch | 0:7627c79db971 | 183 | case 11025: |
Gruenfrosch | 0:7627c79db971 | 184 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 11025); |
Gruenfrosch | 0:7627c79db971 | 185 | break; |
Gruenfrosch | 0:7627c79db971 | 186 | |
Gruenfrosch | 0:7627c79db971 | 187 | case 12000: |
Gruenfrosch | 0:7627c79db971 | 188 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 12000); |
Gruenfrosch | 0:7627c79db971 | 189 | break; |
Gruenfrosch | 0:7627c79db971 | 190 | |
Gruenfrosch | 0:7627c79db971 | 191 | case 16000: |
Gruenfrosch | 0:7627c79db971 | 192 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 16000); |
Gruenfrosch | 0:7627c79db971 | 193 | break; |
Gruenfrosch | 0:7627c79db971 | 194 | |
Gruenfrosch | 0:7627c79db971 | 195 | case 22050: |
Gruenfrosch | 0:7627c79db971 | 196 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 22050); |
Gruenfrosch | 0:7627c79db971 | 197 | break; |
Gruenfrosch | 0:7627c79db971 | 198 | |
Gruenfrosch | 0:7627c79db971 | 199 | case 24000: |
Gruenfrosch | 0:7627c79db971 | 200 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 24000); |
Gruenfrosch | 0:7627c79db971 | 201 | break; |
Gruenfrosch | 0:7627c79db971 | 202 | |
Gruenfrosch | 0:7627c79db971 | 203 | case 32000: |
Gruenfrosch | 0:7627c79db971 | 204 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 32000); |
Gruenfrosch | 0:7627c79db971 | 205 | break; |
Gruenfrosch | 0:7627c79db971 | 206 | |
Gruenfrosch | 0:7627c79db971 | 207 | case 44100: |
Gruenfrosch | 0:7627c79db971 | 208 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 44100); |
Gruenfrosch | 0:7627c79db971 | 209 | break; |
Gruenfrosch | 0:7627c79db971 | 210 | |
Gruenfrosch | 0:7627c79db971 | 211 | case 48000: |
Gruenfrosch | 0:7627c79db971 | 212 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 48000); |
Gruenfrosch | 0:7627c79db971 | 213 | break; |
Gruenfrosch | 0:7627c79db971 | 214 | |
Gruenfrosch | 0:7627c79db971 | 215 | default: |
Gruenfrosch | 0:7627c79db971 | 216 | timer->fraction = scale_rational(numer, denom, MAD_TIMER_RESOLUTION); |
Gruenfrosch | 0:7627c79db971 | 217 | break; |
Gruenfrosch | 0:7627c79db971 | 218 | } |
Gruenfrosch | 0:7627c79db971 | 219 | |
Gruenfrosch | 0:7627c79db971 | 220 | if (timer->fraction >= MAD_TIMER_RESOLUTION) |
Gruenfrosch | 0:7627c79db971 | 221 | reduce_timer(timer); |
Gruenfrosch | 0:7627c79db971 | 222 | } |
Gruenfrosch | 0:7627c79db971 | 223 | |
Gruenfrosch | 0:7627c79db971 | 224 | /* |
Gruenfrosch | 0:7627c79db971 | 225 | * NAME: timer->add() |
Gruenfrosch | 0:7627c79db971 | 226 | * DESCRIPTION: add one timer to another |
Gruenfrosch | 0:7627c79db971 | 227 | */ |
Gruenfrosch | 0:7627c79db971 | 228 | void mad_timer_add(mad_timer_t *timer, mad_timer_t incr) |
Gruenfrosch | 0:7627c79db971 | 229 | { |
Gruenfrosch | 0:7627c79db971 | 230 | timer->seconds += incr.seconds; |
Gruenfrosch | 0:7627c79db971 | 231 | timer->fraction += incr.fraction; |
Gruenfrosch | 0:7627c79db971 | 232 | |
Gruenfrosch | 0:7627c79db971 | 233 | if (timer->fraction >= MAD_TIMER_RESOLUTION) |
Gruenfrosch | 0:7627c79db971 | 234 | reduce_timer(timer); |
Gruenfrosch | 0:7627c79db971 | 235 | } |
Gruenfrosch | 0:7627c79db971 | 236 | |
Gruenfrosch | 0:7627c79db971 | 237 | /* |
Gruenfrosch | 0:7627c79db971 | 238 | * NAME: timer->multiply() |
Gruenfrosch | 0:7627c79db971 | 239 | * DESCRIPTION: multiply a timer by a scalar value |
Gruenfrosch | 0:7627c79db971 | 240 | */ |
Gruenfrosch | 0:7627c79db971 | 241 | void mad_timer_multiply(mad_timer_t *timer, signed long scalar) |
Gruenfrosch | 0:7627c79db971 | 242 | { |
Gruenfrosch | 0:7627c79db971 | 243 | mad_timer_t addend; |
Gruenfrosch | 0:7627c79db971 | 244 | unsigned long factor; |
Gruenfrosch | 0:7627c79db971 | 245 | |
Gruenfrosch | 0:7627c79db971 | 246 | factor = scalar; |
Gruenfrosch | 0:7627c79db971 | 247 | if (scalar < 0) { |
Gruenfrosch | 0:7627c79db971 | 248 | factor = -scalar; |
Gruenfrosch | 0:7627c79db971 | 249 | mad_timer_negate(timer); |
Gruenfrosch | 0:7627c79db971 | 250 | } |
Gruenfrosch | 0:7627c79db971 | 251 | |
Gruenfrosch | 0:7627c79db971 | 252 | addend = *timer; |
Gruenfrosch | 0:7627c79db971 | 253 | *timer = mad_timer_zero; |
Gruenfrosch | 0:7627c79db971 | 254 | |
Gruenfrosch | 0:7627c79db971 | 255 | while (factor) { |
Gruenfrosch | 0:7627c79db971 | 256 | if (factor & 1) |
Gruenfrosch | 0:7627c79db971 | 257 | mad_timer_add(timer, addend); |
Gruenfrosch | 0:7627c79db971 | 258 | |
Gruenfrosch | 0:7627c79db971 | 259 | mad_timer_add(&addend, addend); |
Gruenfrosch | 0:7627c79db971 | 260 | factor >>= 1; |
Gruenfrosch | 0:7627c79db971 | 261 | } |
Gruenfrosch | 0:7627c79db971 | 262 | } |
Gruenfrosch | 0:7627c79db971 | 263 | |
Gruenfrosch | 0:7627c79db971 | 264 | /* |
Gruenfrosch | 0:7627c79db971 | 265 | * NAME: timer->count() |
Gruenfrosch | 0:7627c79db971 | 266 | * DESCRIPTION: return timer value in selected units |
Gruenfrosch | 0:7627c79db971 | 267 | */ |
Gruenfrosch | 0:7627c79db971 | 268 | signed long mad_timer_count(mad_timer_t timer, enum mad_units units) |
Gruenfrosch | 0:7627c79db971 | 269 | { |
Gruenfrosch | 0:7627c79db971 | 270 | switch (units) { |
Gruenfrosch | 0:7627c79db971 | 271 | case MAD_UNITS_HOURS: |
Gruenfrosch | 0:7627c79db971 | 272 | return timer.seconds / 60 / 60; |
Gruenfrosch | 0:7627c79db971 | 273 | |
Gruenfrosch | 0:7627c79db971 | 274 | case MAD_UNITS_MINUTES: |
Gruenfrosch | 0:7627c79db971 | 275 | return timer.seconds / 60; |
Gruenfrosch | 0:7627c79db971 | 276 | |
Gruenfrosch | 0:7627c79db971 | 277 | case MAD_UNITS_SECONDS: |
Gruenfrosch | 0:7627c79db971 | 278 | return timer.seconds; |
Gruenfrosch | 0:7627c79db971 | 279 | |
Gruenfrosch | 0:7627c79db971 | 280 | case MAD_UNITS_DECISECONDS: |
Gruenfrosch | 0:7627c79db971 | 281 | case MAD_UNITS_CENTISECONDS: |
Gruenfrosch | 0:7627c79db971 | 282 | case MAD_UNITS_MILLISECONDS: |
Gruenfrosch | 0:7627c79db971 | 283 | |
Gruenfrosch | 0:7627c79db971 | 284 | case MAD_UNITS_8000_HZ: |
Gruenfrosch | 0:7627c79db971 | 285 | case MAD_UNITS_11025_HZ: |
Gruenfrosch | 0:7627c79db971 | 286 | case MAD_UNITS_12000_HZ: |
Gruenfrosch | 0:7627c79db971 | 287 | case MAD_UNITS_16000_HZ: |
Gruenfrosch | 0:7627c79db971 | 288 | case MAD_UNITS_22050_HZ: |
Gruenfrosch | 0:7627c79db971 | 289 | case MAD_UNITS_24000_HZ: |
Gruenfrosch | 0:7627c79db971 | 290 | case MAD_UNITS_32000_HZ: |
Gruenfrosch | 0:7627c79db971 | 291 | case MAD_UNITS_44100_HZ: |
Gruenfrosch | 0:7627c79db971 | 292 | case MAD_UNITS_48000_HZ: |
Gruenfrosch | 0:7627c79db971 | 293 | |
Gruenfrosch | 0:7627c79db971 | 294 | case MAD_UNITS_24_FPS: |
Gruenfrosch | 0:7627c79db971 | 295 | case MAD_UNITS_25_FPS: |
Gruenfrosch | 0:7627c79db971 | 296 | case MAD_UNITS_30_FPS: |
Gruenfrosch | 0:7627c79db971 | 297 | case MAD_UNITS_48_FPS: |
Gruenfrosch | 0:7627c79db971 | 298 | case MAD_UNITS_50_FPS: |
Gruenfrosch | 0:7627c79db971 | 299 | case MAD_UNITS_60_FPS: |
Gruenfrosch | 0:7627c79db971 | 300 | case MAD_UNITS_75_FPS: |
Gruenfrosch | 0:7627c79db971 | 301 | return timer.seconds * (signed long) units + |
Gruenfrosch | 0:7627c79db971 | 302 | (signed long) scale_rational(timer.fraction, MAD_TIMER_RESOLUTION, |
Gruenfrosch | 0:7627c79db971 | 303 | units); |
Gruenfrosch | 0:7627c79db971 | 304 | |
Gruenfrosch | 0:7627c79db971 | 305 | case MAD_UNITS_23_976_FPS: |
Gruenfrosch | 0:7627c79db971 | 306 | case MAD_UNITS_24_975_FPS: |
Gruenfrosch | 0:7627c79db971 | 307 | case MAD_UNITS_29_97_FPS: |
Gruenfrosch | 0:7627c79db971 | 308 | case MAD_UNITS_47_952_FPS: |
Gruenfrosch | 0:7627c79db971 | 309 | case MAD_UNITS_49_95_FPS: |
Gruenfrosch | 0:7627c79db971 | 310 | case MAD_UNITS_59_94_FPS: |
Gruenfrosch | 0:7627c79db971 | 311 | return (mad_timer_count(timer, (enum mad_units)-units) + 1) * 1000 / 1001; |
Gruenfrosch | 0:7627c79db971 | 312 | } |
Gruenfrosch | 0:7627c79db971 | 313 | |
Gruenfrosch | 0:7627c79db971 | 314 | /* unsupported units */ |
Gruenfrosch | 0:7627c79db971 | 315 | return 0; |
Gruenfrosch | 0:7627c79db971 | 316 | } |
Gruenfrosch | 0:7627c79db971 | 317 | |
Gruenfrosch | 0:7627c79db971 | 318 | /* |
Gruenfrosch | 0:7627c79db971 | 319 | * NAME: timer->fraction() |
Gruenfrosch | 0:7627c79db971 | 320 | * DESCRIPTION: return fractional part of timer in arbitrary terms |
Gruenfrosch | 0:7627c79db971 | 321 | */ |
Gruenfrosch | 0:7627c79db971 | 322 | unsigned long mad_timer_fraction(mad_timer_t timer, unsigned long denom) |
Gruenfrosch | 0:7627c79db971 | 323 | { |
Gruenfrosch | 0:7627c79db971 | 324 | timer = mad_timer_abs(timer); |
Gruenfrosch | 0:7627c79db971 | 325 | |
Gruenfrosch | 0:7627c79db971 | 326 | switch (denom) { |
Gruenfrosch | 0:7627c79db971 | 327 | case 0: |
Gruenfrosch | 0:7627c79db971 | 328 | return timer.fraction ? |
Gruenfrosch | 0:7627c79db971 | 329 | MAD_TIMER_RESOLUTION / timer.fraction : MAD_TIMER_RESOLUTION + 1; |
Gruenfrosch | 0:7627c79db971 | 330 | |
Gruenfrosch | 0:7627c79db971 | 331 | case MAD_TIMER_RESOLUTION: |
Gruenfrosch | 0:7627c79db971 | 332 | return timer.fraction; |
Gruenfrosch | 0:7627c79db971 | 333 | |
Gruenfrosch | 0:7627c79db971 | 334 | default: |
Gruenfrosch | 0:7627c79db971 | 335 | return scale_rational(timer.fraction, MAD_TIMER_RESOLUTION, denom); |
Gruenfrosch | 0:7627c79db971 | 336 | } |
Gruenfrosch | 0:7627c79db971 | 337 | } |
Gruenfrosch | 0:7627c79db971 | 338 | |
Gruenfrosch | 0:7627c79db971 | 339 | /* |
Gruenfrosch | 0:7627c79db971 | 340 | * NAME: timer->string() |
Gruenfrosch | 0:7627c79db971 | 341 | * DESCRIPTION: write a string representation of a timer using a template |
Gruenfrosch | 0:7627c79db971 | 342 | */ |
Gruenfrosch | 0:7627c79db971 | 343 | void mad_timer_string(mad_timer_t timer, |
Gruenfrosch | 0:7627c79db971 | 344 | char *dest, char const *format, enum mad_units units, |
Gruenfrosch | 0:7627c79db971 | 345 | enum mad_units fracunits, unsigned long subparts) |
Gruenfrosch | 0:7627c79db971 | 346 | { |
Gruenfrosch | 0:7627c79db971 | 347 | unsigned long hours, minutes, seconds, sub; |
Gruenfrosch | 0:7627c79db971 | 348 | unsigned int frac; |
Gruenfrosch | 0:7627c79db971 | 349 | |
Gruenfrosch | 0:7627c79db971 | 350 | timer = mad_timer_abs(timer); |
Gruenfrosch | 0:7627c79db971 | 351 | |
Gruenfrosch | 0:7627c79db971 | 352 | seconds = timer.seconds; |
Gruenfrosch | 0:7627c79db971 | 353 | frac = sub = 0; |
Gruenfrosch | 0:7627c79db971 | 354 | |
Gruenfrosch | 0:7627c79db971 | 355 | switch (fracunits) { |
Gruenfrosch | 0:7627c79db971 | 356 | case MAD_UNITS_HOURS: |
Gruenfrosch | 0:7627c79db971 | 357 | case MAD_UNITS_MINUTES: |
Gruenfrosch | 0:7627c79db971 | 358 | case MAD_UNITS_SECONDS: |
Gruenfrosch | 0:7627c79db971 | 359 | break; |
Gruenfrosch | 0:7627c79db971 | 360 | |
Gruenfrosch | 0:7627c79db971 | 361 | case MAD_UNITS_DECISECONDS: |
Gruenfrosch | 0:7627c79db971 | 362 | case MAD_UNITS_CENTISECONDS: |
Gruenfrosch | 0:7627c79db971 | 363 | case MAD_UNITS_MILLISECONDS: |
Gruenfrosch | 0:7627c79db971 | 364 | |
Gruenfrosch | 0:7627c79db971 | 365 | case MAD_UNITS_8000_HZ: |
Gruenfrosch | 0:7627c79db971 | 366 | case MAD_UNITS_11025_HZ: |
Gruenfrosch | 0:7627c79db971 | 367 | case MAD_UNITS_12000_HZ: |
Gruenfrosch | 0:7627c79db971 | 368 | case MAD_UNITS_16000_HZ: |
Gruenfrosch | 0:7627c79db971 | 369 | case MAD_UNITS_22050_HZ: |
Gruenfrosch | 0:7627c79db971 | 370 | case MAD_UNITS_24000_HZ: |
Gruenfrosch | 0:7627c79db971 | 371 | case MAD_UNITS_32000_HZ: |
Gruenfrosch | 0:7627c79db971 | 372 | case MAD_UNITS_44100_HZ: |
Gruenfrosch | 0:7627c79db971 | 373 | case MAD_UNITS_48000_HZ: |
Gruenfrosch | 0:7627c79db971 | 374 | |
Gruenfrosch | 0:7627c79db971 | 375 | case MAD_UNITS_24_FPS: |
Gruenfrosch | 0:7627c79db971 | 376 | case MAD_UNITS_25_FPS: |
Gruenfrosch | 0:7627c79db971 | 377 | case MAD_UNITS_30_FPS: |
Gruenfrosch | 0:7627c79db971 | 378 | case MAD_UNITS_48_FPS: |
Gruenfrosch | 0:7627c79db971 | 379 | case MAD_UNITS_50_FPS: |
Gruenfrosch | 0:7627c79db971 | 380 | case MAD_UNITS_60_FPS: |
Gruenfrosch | 0:7627c79db971 | 381 | case MAD_UNITS_75_FPS: |
Gruenfrosch | 0:7627c79db971 | 382 | { |
Gruenfrosch | 0:7627c79db971 | 383 | unsigned long denom; |
Gruenfrosch | 0:7627c79db971 | 384 | |
Gruenfrosch | 0:7627c79db971 | 385 | denom = MAD_TIMER_RESOLUTION / fracunits; |
Gruenfrosch | 0:7627c79db971 | 386 | |
Gruenfrosch | 0:7627c79db971 | 387 | frac = timer.fraction / denom; |
Gruenfrosch | 0:7627c79db971 | 388 | sub = scale_rational(timer.fraction % denom, denom, subparts); |
Gruenfrosch | 0:7627c79db971 | 389 | } |
Gruenfrosch | 0:7627c79db971 | 390 | break; |
Gruenfrosch | 0:7627c79db971 | 391 | |
Gruenfrosch | 0:7627c79db971 | 392 | case MAD_UNITS_23_976_FPS: |
Gruenfrosch | 0:7627c79db971 | 393 | case MAD_UNITS_24_975_FPS: |
Gruenfrosch | 0:7627c79db971 | 394 | case MAD_UNITS_29_97_FPS: |
Gruenfrosch | 0:7627c79db971 | 395 | case MAD_UNITS_47_952_FPS: |
Gruenfrosch | 0:7627c79db971 | 396 | case MAD_UNITS_49_95_FPS: |
Gruenfrosch | 0:7627c79db971 | 397 | case MAD_UNITS_59_94_FPS: |
Gruenfrosch | 0:7627c79db971 | 398 | /* drop-frame encoding */ |
Gruenfrosch | 0:7627c79db971 | 399 | /* N.B. this is only well-defined for MAD_UNITS_29_97_FPS */ |
Gruenfrosch | 0:7627c79db971 | 400 | { |
Gruenfrosch | 0:7627c79db971 | 401 | unsigned long frame, cycle, d, m; |
Gruenfrosch | 0:7627c79db971 | 402 | |
Gruenfrosch | 0:7627c79db971 | 403 | frame = mad_timer_count(timer, fracunits); |
Gruenfrosch | 0:7627c79db971 | 404 | |
Gruenfrosch | 0:7627c79db971 | 405 | cycle = -fracunits * 60 * 10 - (10 - 1) * 2; |
Gruenfrosch | 0:7627c79db971 | 406 | |
Gruenfrosch | 0:7627c79db971 | 407 | d = frame / cycle; |
Gruenfrosch | 0:7627c79db971 | 408 | m = frame % cycle; |
Gruenfrosch | 0:7627c79db971 | 409 | frame += (10 - 1) * 2 * d; |
Gruenfrosch | 0:7627c79db971 | 410 | if (m > 2) |
Gruenfrosch | 0:7627c79db971 | 411 | frame += 2 * ((m - 2) / (cycle / 10)); |
Gruenfrosch | 0:7627c79db971 | 412 | |
Gruenfrosch | 0:7627c79db971 | 413 | frac = frame % -fracunits; |
Gruenfrosch | 0:7627c79db971 | 414 | seconds = frame / -fracunits; |
Gruenfrosch | 0:7627c79db971 | 415 | } |
Gruenfrosch | 0:7627c79db971 | 416 | break; |
Gruenfrosch | 0:7627c79db971 | 417 | } |
Gruenfrosch | 0:7627c79db971 | 418 | |
Gruenfrosch | 0:7627c79db971 | 419 | switch (units) { |
Gruenfrosch | 0:7627c79db971 | 420 | case MAD_UNITS_HOURS: |
Gruenfrosch | 0:7627c79db971 | 421 | minutes = seconds / 60; |
Gruenfrosch | 0:7627c79db971 | 422 | hours = minutes / 60; |
Gruenfrosch | 0:7627c79db971 | 423 | |
Gruenfrosch | 0:7627c79db971 | 424 | sprintf(dest, format, |
Gruenfrosch | 0:7627c79db971 | 425 | hours, |
Gruenfrosch | 0:7627c79db971 | 426 | (unsigned int) (minutes % 60), |
Gruenfrosch | 0:7627c79db971 | 427 | (unsigned int) (seconds % 60), |
Gruenfrosch | 0:7627c79db971 | 428 | frac, sub); |
Gruenfrosch | 0:7627c79db971 | 429 | break; |
Gruenfrosch | 0:7627c79db971 | 430 | |
Gruenfrosch | 0:7627c79db971 | 431 | case MAD_UNITS_MINUTES: |
Gruenfrosch | 0:7627c79db971 | 432 | minutes = seconds / 60; |
Gruenfrosch | 0:7627c79db971 | 433 | |
Gruenfrosch | 0:7627c79db971 | 434 | sprintf(dest, format, |
Gruenfrosch | 0:7627c79db971 | 435 | minutes, |
Gruenfrosch | 0:7627c79db971 | 436 | (unsigned int) (seconds % 60), |
Gruenfrosch | 0:7627c79db971 | 437 | frac, sub); |
Gruenfrosch | 0:7627c79db971 | 438 | break; |
Gruenfrosch | 0:7627c79db971 | 439 | |
Gruenfrosch | 0:7627c79db971 | 440 | case MAD_UNITS_SECONDS: |
Gruenfrosch | 0:7627c79db971 | 441 | sprintf(dest, format, |
Gruenfrosch | 0:7627c79db971 | 442 | seconds, |
Gruenfrosch | 0:7627c79db971 | 443 | frac, sub); |
Gruenfrosch | 0:7627c79db971 | 444 | break; |
Gruenfrosch | 0:7627c79db971 | 445 | |
Gruenfrosch | 0:7627c79db971 | 446 | case MAD_UNITS_23_976_FPS: |
Gruenfrosch | 0:7627c79db971 | 447 | case MAD_UNITS_24_975_FPS: |
Gruenfrosch | 0:7627c79db971 | 448 | case MAD_UNITS_29_97_FPS: |
Gruenfrosch | 0:7627c79db971 | 449 | case MAD_UNITS_47_952_FPS: |
Gruenfrosch | 0:7627c79db971 | 450 | case MAD_UNITS_49_95_FPS: |
Gruenfrosch | 0:7627c79db971 | 451 | case MAD_UNITS_59_94_FPS: |
Gruenfrosch | 0:7627c79db971 | 452 | if (fracunits < 0) { |
Gruenfrosch | 0:7627c79db971 | 453 | /* not yet implemented */ |
Gruenfrosch | 0:7627c79db971 | 454 | sub = 0; |
Gruenfrosch | 0:7627c79db971 | 455 | } |
Gruenfrosch | 0:7627c79db971 | 456 | |
Gruenfrosch | 0:7627c79db971 | 457 | /* fall through */ |
Gruenfrosch | 0:7627c79db971 | 458 | |
Gruenfrosch | 0:7627c79db971 | 459 | case MAD_UNITS_DECISECONDS: |
Gruenfrosch | 0:7627c79db971 | 460 | case MAD_UNITS_CENTISECONDS: |
Gruenfrosch | 0:7627c79db971 | 461 | case MAD_UNITS_MILLISECONDS: |
Gruenfrosch | 0:7627c79db971 | 462 | |
Gruenfrosch | 0:7627c79db971 | 463 | case MAD_UNITS_8000_HZ: |
Gruenfrosch | 0:7627c79db971 | 464 | case MAD_UNITS_11025_HZ: |
Gruenfrosch | 0:7627c79db971 | 465 | case MAD_UNITS_12000_HZ: |
Gruenfrosch | 0:7627c79db971 | 466 | case MAD_UNITS_16000_HZ: |
Gruenfrosch | 0:7627c79db971 | 467 | case MAD_UNITS_22050_HZ: |
Gruenfrosch | 0:7627c79db971 | 468 | case MAD_UNITS_24000_HZ: |
Gruenfrosch | 0:7627c79db971 | 469 | case MAD_UNITS_32000_HZ: |
Gruenfrosch | 0:7627c79db971 | 470 | case MAD_UNITS_44100_HZ: |
Gruenfrosch | 0:7627c79db971 | 471 | case MAD_UNITS_48000_HZ: |
Gruenfrosch | 0:7627c79db971 | 472 | |
Gruenfrosch | 0:7627c79db971 | 473 | case MAD_UNITS_24_FPS: |
Gruenfrosch | 0:7627c79db971 | 474 | case MAD_UNITS_25_FPS: |
Gruenfrosch | 0:7627c79db971 | 475 | case MAD_UNITS_30_FPS: |
Gruenfrosch | 0:7627c79db971 | 476 | case MAD_UNITS_48_FPS: |
Gruenfrosch | 0:7627c79db971 | 477 | case MAD_UNITS_50_FPS: |
Gruenfrosch | 0:7627c79db971 | 478 | case MAD_UNITS_60_FPS: |
Gruenfrosch | 0:7627c79db971 | 479 | case MAD_UNITS_75_FPS: |
Gruenfrosch | 0:7627c79db971 | 480 | sprintf(dest, format, mad_timer_count(timer, units), sub); |
Gruenfrosch | 0:7627c79db971 | 481 | break; |
Gruenfrosch | 0:7627c79db971 | 482 | } |
Gruenfrosch | 0:7627c79db971 | 483 | } |