MP3 Player. You can change fwd/rev speed and skip. see: http://mbed.org/users/okini3939/notebook/lpc4088_madplayer/
Dependencies: I2SSlave SDFileSystem TLV320 mbed
madplayer/timer.cpp@0:8ba6230eefbd, 2014-02-18 (annotated)
- Committer:
- okini3939
- Date:
- Tue Feb 18 00:22:50 2014 +0000
- Revision:
- 0:8ba6230eefbd
1st build
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
okini3939 | 0:8ba6230eefbd | 1 | /* |
okini3939 | 0:8ba6230eefbd | 2 | * libmad - MPEG audio decoder library |
okini3939 | 0:8ba6230eefbd | 3 | * Copyright (C) 2000-2004 Underbit Technologies, Inc. |
okini3939 | 0:8ba6230eefbd | 4 | * |
okini3939 | 0:8ba6230eefbd | 5 | * This program is free software; you can redistribute it and/or modify |
okini3939 | 0:8ba6230eefbd | 6 | * it under the terms of the GNU General Public License as published by |
okini3939 | 0:8ba6230eefbd | 7 | * the Free Software Foundation; either version 2 of the License, or |
okini3939 | 0:8ba6230eefbd | 8 | * (at your option) any later version. |
okini3939 | 0:8ba6230eefbd | 9 | * |
okini3939 | 0:8ba6230eefbd | 10 | * This program is distributed in the hope that it will be useful, |
okini3939 | 0:8ba6230eefbd | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
okini3939 | 0:8ba6230eefbd | 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
okini3939 | 0:8ba6230eefbd | 13 | * GNU General Public License for more details. |
okini3939 | 0:8ba6230eefbd | 14 | * |
okini3939 | 0:8ba6230eefbd | 15 | * You should have received a copy of the GNU General Public License |
okini3939 | 0:8ba6230eefbd | 16 | * along with this program; if not, write to the Free Software |
okini3939 | 0:8ba6230eefbd | 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
okini3939 | 0:8ba6230eefbd | 18 | * |
okini3939 | 0:8ba6230eefbd | 19 | * $Id: timer.c,v 1.1 2010/11/23 20:12:57 andy Exp $ |
okini3939 | 0:8ba6230eefbd | 20 | */ |
okini3939 | 0:8ba6230eefbd | 21 | |
okini3939 | 0:8ba6230eefbd | 22 | # include "config.h" |
okini3939 | 0:8ba6230eefbd | 23 | |
okini3939 | 0:8ba6230eefbd | 24 | # include "global.h" |
okini3939 | 0:8ba6230eefbd | 25 | |
okini3939 | 0:8ba6230eefbd | 26 | # include <stdio.h> |
okini3939 | 0:8ba6230eefbd | 27 | |
okini3939 | 0:8ba6230eefbd | 28 | # include "timer.h" |
okini3939 | 0:8ba6230eefbd | 29 | |
okini3939 | 0:8ba6230eefbd | 30 | mad_timer_t const mad_timer_zero = { 0, 0 }; |
okini3939 | 0:8ba6230eefbd | 31 | |
okini3939 | 0:8ba6230eefbd | 32 | /* |
okini3939 | 0:8ba6230eefbd | 33 | * NAME: timer->compare() |
okini3939 | 0:8ba6230eefbd | 34 | * DESCRIPTION: indicate relative order of two timers |
okini3939 | 0:8ba6230eefbd | 35 | */ |
okini3939 | 0:8ba6230eefbd | 36 | int mad_timer_compare(mad_timer_t timer1, mad_timer_t timer2) |
okini3939 | 0:8ba6230eefbd | 37 | { |
okini3939 | 0:8ba6230eefbd | 38 | signed long diff; |
okini3939 | 0:8ba6230eefbd | 39 | |
okini3939 | 0:8ba6230eefbd | 40 | diff = timer1.seconds - timer2.seconds; |
okini3939 | 0:8ba6230eefbd | 41 | if (diff < 0) |
okini3939 | 0:8ba6230eefbd | 42 | return -1; |
okini3939 | 0:8ba6230eefbd | 43 | else if (diff > 0) |
okini3939 | 0:8ba6230eefbd | 44 | return +1; |
okini3939 | 0:8ba6230eefbd | 45 | |
okini3939 | 0:8ba6230eefbd | 46 | diff = timer1.fraction - timer2.fraction; |
okini3939 | 0:8ba6230eefbd | 47 | if (diff < 0) |
okini3939 | 0:8ba6230eefbd | 48 | return -1; |
okini3939 | 0:8ba6230eefbd | 49 | else if (diff > 0) |
okini3939 | 0:8ba6230eefbd | 50 | return +1; |
okini3939 | 0:8ba6230eefbd | 51 | |
okini3939 | 0:8ba6230eefbd | 52 | return 0; |
okini3939 | 0:8ba6230eefbd | 53 | } |
okini3939 | 0:8ba6230eefbd | 54 | |
okini3939 | 0:8ba6230eefbd | 55 | /* |
okini3939 | 0:8ba6230eefbd | 56 | * NAME: timer->negate() |
okini3939 | 0:8ba6230eefbd | 57 | * DESCRIPTION: invert the sign of a timer |
okini3939 | 0:8ba6230eefbd | 58 | */ |
okini3939 | 0:8ba6230eefbd | 59 | void mad_timer_negate(mad_timer_t *timer) |
okini3939 | 0:8ba6230eefbd | 60 | { |
okini3939 | 0:8ba6230eefbd | 61 | timer->seconds = -timer->seconds; |
okini3939 | 0:8ba6230eefbd | 62 | |
okini3939 | 0:8ba6230eefbd | 63 | if (timer->fraction) { |
okini3939 | 0:8ba6230eefbd | 64 | timer->seconds -= 1; |
okini3939 | 0:8ba6230eefbd | 65 | timer->fraction = MAD_TIMER_RESOLUTION - timer->fraction; |
okini3939 | 0:8ba6230eefbd | 66 | } |
okini3939 | 0:8ba6230eefbd | 67 | } |
okini3939 | 0:8ba6230eefbd | 68 | |
okini3939 | 0:8ba6230eefbd | 69 | /* |
okini3939 | 0:8ba6230eefbd | 70 | * NAME: timer->abs() |
okini3939 | 0:8ba6230eefbd | 71 | * DESCRIPTION: return the absolute value of a timer |
okini3939 | 0:8ba6230eefbd | 72 | */ |
okini3939 | 0:8ba6230eefbd | 73 | mad_timer_t mad_timer_abs(mad_timer_t timer) |
okini3939 | 0:8ba6230eefbd | 74 | { |
okini3939 | 0:8ba6230eefbd | 75 | if (timer.seconds < 0) |
okini3939 | 0:8ba6230eefbd | 76 | mad_timer_negate(&timer); |
okini3939 | 0:8ba6230eefbd | 77 | |
okini3939 | 0:8ba6230eefbd | 78 | return timer; |
okini3939 | 0:8ba6230eefbd | 79 | } |
okini3939 | 0:8ba6230eefbd | 80 | |
okini3939 | 0:8ba6230eefbd | 81 | /* |
okini3939 | 0:8ba6230eefbd | 82 | * NAME: reduce_timer() |
okini3939 | 0:8ba6230eefbd | 83 | * DESCRIPTION: carry timer fraction into seconds |
okini3939 | 0:8ba6230eefbd | 84 | */ |
okini3939 | 0:8ba6230eefbd | 85 | static |
okini3939 | 0:8ba6230eefbd | 86 | void reduce_timer(mad_timer_t *timer) |
okini3939 | 0:8ba6230eefbd | 87 | { |
okini3939 | 0:8ba6230eefbd | 88 | timer->seconds += timer->fraction / MAD_TIMER_RESOLUTION; |
okini3939 | 0:8ba6230eefbd | 89 | timer->fraction %= MAD_TIMER_RESOLUTION; |
okini3939 | 0:8ba6230eefbd | 90 | } |
okini3939 | 0:8ba6230eefbd | 91 | |
okini3939 | 0:8ba6230eefbd | 92 | /* |
okini3939 | 0:8ba6230eefbd | 93 | * NAME: gcd() |
okini3939 | 0:8ba6230eefbd | 94 | * DESCRIPTION: compute greatest common denominator |
okini3939 | 0:8ba6230eefbd | 95 | */ |
okini3939 | 0:8ba6230eefbd | 96 | static |
okini3939 | 0:8ba6230eefbd | 97 | unsigned long gcd(unsigned long num1, unsigned long num2) |
okini3939 | 0:8ba6230eefbd | 98 | { |
okini3939 | 0:8ba6230eefbd | 99 | unsigned long tmp; |
okini3939 | 0:8ba6230eefbd | 100 | |
okini3939 | 0:8ba6230eefbd | 101 | while (num2) { |
okini3939 | 0:8ba6230eefbd | 102 | tmp = num2; |
okini3939 | 0:8ba6230eefbd | 103 | num2 = num1 % num2; |
okini3939 | 0:8ba6230eefbd | 104 | num1 = tmp; |
okini3939 | 0:8ba6230eefbd | 105 | } |
okini3939 | 0:8ba6230eefbd | 106 | |
okini3939 | 0:8ba6230eefbd | 107 | return num1; |
okini3939 | 0:8ba6230eefbd | 108 | } |
okini3939 | 0:8ba6230eefbd | 109 | |
okini3939 | 0:8ba6230eefbd | 110 | /* |
okini3939 | 0:8ba6230eefbd | 111 | * NAME: reduce_rational() |
okini3939 | 0:8ba6230eefbd | 112 | * DESCRIPTION: convert rational expression to lowest terms |
okini3939 | 0:8ba6230eefbd | 113 | */ |
okini3939 | 0:8ba6230eefbd | 114 | static |
okini3939 | 0:8ba6230eefbd | 115 | void reduce_rational(unsigned long *numer, unsigned long *denom) |
okini3939 | 0:8ba6230eefbd | 116 | { |
okini3939 | 0:8ba6230eefbd | 117 | unsigned long factor; |
okini3939 | 0:8ba6230eefbd | 118 | |
okini3939 | 0:8ba6230eefbd | 119 | factor = gcd(*numer, *denom); |
okini3939 | 0:8ba6230eefbd | 120 | |
okini3939 | 0:8ba6230eefbd | 121 | /* assert(factor != 0); */ |
okini3939 | 0:8ba6230eefbd | 122 | |
okini3939 | 0:8ba6230eefbd | 123 | *numer /= factor; |
okini3939 | 0:8ba6230eefbd | 124 | *denom /= factor; |
okini3939 | 0:8ba6230eefbd | 125 | } |
okini3939 | 0:8ba6230eefbd | 126 | |
okini3939 | 0:8ba6230eefbd | 127 | /* |
okini3939 | 0:8ba6230eefbd | 128 | * NAME: scale_rational() |
okini3939 | 0:8ba6230eefbd | 129 | * DESCRIPTION: solve numer/denom == ?/scale avoiding overflowing |
okini3939 | 0:8ba6230eefbd | 130 | */ |
okini3939 | 0:8ba6230eefbd | 131 | static |
okini3939 | 0:8ba6230eefbd | 132 | unsigned long scale_rational(unsigned long numer, unsigned long denom, |
okini3939 | 0:8ba6230eefbd | 133 | unsigned long scale) |
okini3939 | 0:8ba6230eefbd | 134 | { |
okini3939 | 0:8ba6230eefbd | 135 | reduce_rational(&numer, &denom); |
okini3939 | 0:8ba6230eefbd | 136 | reduce_rational(&scale, &denom); |
okini3939 | 0:8ba6230eefbd | 137 | |
okini3939 | 0:8ba6230eefbd | 138 | /* assert(denom != 0);*/ |
okini3939 | 0:8ba6230eefbd | 139 | |
okini3939 | 0:8ba6230eefbd | 140 | if (denom < scale) |
okini3939 | 0:8ba6230eefbd | 141 | return numer * (scale / denom) + numer * (scale % denom) / denom; |
okini3939 | 0:8ba6230eefbd | 142 | if (denom < numer) |
okini3939 | 0:8ba6230eefbd | 143 | return scale * (numer / denom) + scale * (numer % denom) / denom; |
okini3939 | 0:8ba6230eefbd | 144 | |
okini3939 | 0:8ba6230eefbd | 145 | return numer * scale / denom; |
okini3939 | 0:8ba6230eefbd | 146 | } |
okini3939 | 0:8ba6230eefbd | 147 | |
okini3939 | 0:8ba6230eefbd | 148 | /* |
okini3939 | 0:8ba6230eefbd | 149 | * NAME: timer->set() |
okini3939 | 0:8ba6230eefbd | 150 | * DESCRIPTION: set timer to specific (positive) value |
okini3939 | 0:8ba6230eefbd | 151 | */ |
okini3939 | 0:8ba6230eefbd | 152 | void mad_timer_set(mad_timer_t *timer, unsigned long seconds, |
okini3939 | 0:8ba6230eefbd | 153 | unsigned long numer, unsigned long denom) |
okini3939 | 0:8ba6230eefbd | 154 | { |
okini3939 | 0:8ba6230eefbd | 155 | timer->seconds = seconds; |
okini3939 | 0:8ba6230eefbd | 156 | if (numer >= denom && denom > 0) { |
okini3939 | 0:8ba6230eefbd | 157 | timer->seconds += numer / denom; |
okini3939 | 0:8ba6230eefbd | 158 | numer %= denom; |
okini3939 | 0:8ba6230eefbd | 159 | } |
okini3939 | 0:8ba6230eefbd | 160 | |
okini3939 | 0:8ba6230eefbd | 161 | switch (denom) { |
okini3939 | 0:8ba6230eefbd | 162 | case 0: |
okini3939 | 0:8ba6230eefbd | 163 | case 1: |
okini3939 | 0:8ba6230eefbd | 164 | timer->fraction = 0; |
okini3939 | 0:8ba6230eefbd | 165 | break; |
okini3939 | 0:8ba6230eefbd | 166 | |
okini3939 | 0:8ba6230eefbd | 167 | case MAD_TIMER_RESOLUTION: |
okini3939 | 0:8ba6230eefbd | 168 | timer->fraction = numer; |
okini3939 | 0:8ba6230eefbd | 169 | break; |
okini3939 | 0:8ba6230eefbd | 170 | |
okini3939 | 0:8ba6230eefbd | 171 | case 1000: |
okini3939 | 0:8ba6230eefbd | 172 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 1000); |
okini3939 | 0:8ba6230eefbd | 173 | break; |
okini3939 | 0:8ba6230eefbd | 174 | |
okini3939 | 0:8ba6230eefbd | 175 | case 8000: |
okini3939 | 0:8ba6230eefbd | 176 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 8000); |
okini3939 | 0:8ba6230eefbd | 177 | break; |
okini3939 | 0:8ba6230eefbd | 178 | |
okini3939 | 0:8ba6230eefbd | 179 | case 11025: |
okini3939 | 0:8ba6230eefbd | 180 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 11025); |
okini3939 | 0:8ba6230eefbd | 181 | break; |
okini3939 | 0:8ba6230eefbd | 182 | |
okini3939 | 0:8ba6230eefbd | 183 | case 12000: |
okini3939 | 0:8ba6230eefbd | 184 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 12000); |
okini3939 | 0:8ba6230eefbd | 185 | break; |
okini3939 | 0:8ba6230eefbd | 186 | |
okini3939 | 0:8ba6230eefbd | 187 | case 16000: |
okini3939 | 0:8ba6230eefbd | 188 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 16000); |
okini3939 | 0:8ba6230eefbd | 189 | break; |
okini3939 | 0:8ba6230eefbd | 190 | |
okini3939 | 0:8ba6230eefbd | 191 | case 22050: |
okini3939 | 0:8ba6230eefbd | 192 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 22050); |
okini3939 | 0:8ba6230eefbd | 193 | break; |
okini3939 | 0:8ba6230eefbd | 194 | |
okini3939 | 0:8ba6230eefbd | 195 | case 24000: |
okini3939 | 0:8ba6230eefbd | 196 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 24000); |
okini3939 | 0:8ba6230eefbd | 197 | break; |
okini3939 | 0:8ba6230eefbd | 198 | |
okini3939 | 0:8ba6230eefbd | 199 | case 32000: |
okini3939 | 0:8ba6230eefbd | 200 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 32000); |
okini3939 | 0:8ba6230eefbd | 201 | break; |
okini3939 | 0:8ba6230eefbd | 202 | |
okini3939 | 0:8ba6230eefbd | 203 | case 44100: |
okini3939 | 0:8ba6230eefbd | 204 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 44100); |
okini3939 | 0:8ba6230eefbd | 205 | break; |
okini3939 | 0:8ba6230eefbd | 206 | |
okini3939 | 0:8ba6230eefbd | 207 | case 48000: |
okini3939 | 0:8ba6230eefbd | 208 | timer->fraction = numer * (MAD_TIMER_RESOLUTION / 48000); |
okini3939 | 0:8ba6230eefbd | 209 | break; |
okini3939 | 0:8ba6230eefbd | 210 | |
okini3939 | 0:8ba6230eefbd | 211 | default: |
okini3939 | 0:8ba6230eefbd | 212 | timer->fraction = scale_rational(numer, denom, MAD_TIMER_RESOLUTION); |
okini3939 | 0:8ba6230eefbd | 213 | break; |
okini3939 | 0:8ba6230eefbd | 214 | } |
okini3939 | 0:8ba6230eefbd | 215 | |
okini3939 | 0:8ba6230eefbd | 216 | if (timer->fraction >= MAD_TIMER_RESOLUTION) |
okini3939 | 0:8ba6230eefbd | 217 | reduce_timer(timer); |
okini3939 | 0:8ba6230eefbd | 218 | } |
okini3939 | 0:8ba6230eefbd | 219 | |
okini3939 | 0:8ba6230eefbd | 220 | /* |
okini3939 | 0:8ba6230eefbd | 221 | * NAME: timer->add() |
okini3939 | 0:8ba6230eefbd | 222 | * DESCRIPTION: add one timer to another |
okini3939 | 0:8ba6230eefbd | 223 | */ |
okini3939 | 0:8ba6230eefbd | 224 | void mad_timer_add(mad_timer_t *timer, mad_timer_t incr) |
okini3939 | 0:8ba6230eefbd | 225 | { |
okini3939 | 0:8ba6230eefbd | 226 | timer->seconds += incr.seconds; |
okini3939 | 0:8ba6230eefbd | 227 | timer->fraction += incr.fraction; |
okini3939 | 0:8ba6230eefbd | 228 | |
okini3939 | 0:8ba6230eefbd | 229 | if (timer->fraction >= MAD_TIMER_RESOLUTION) |
okini3939 | 0:8ba6230eefbd | 230 | reduce_timer(timer); |
okini3939 | 0:8ba6230eefbd | 231 | } |
okini3939 | 0:8ba6230eefbd | 232 | |
okini3939 | 0:8ba6230eefbd | 233 | /* |
okini3939 | 0:8ba6230eefbd | 234 | * NAME: timer->multiply() |
okini3939 | 0:8ba6230eefbd | 235 | * DESCRIPTION: multiply a timer by a scalar value |
okini3939 | 0:8ba6230eefbd | 236 | */ |
okini3939 | 0:8ba6230eefbd | 237 | void mad_timer_multiply(mad_timer_t *timer, signed long scalar) |
okini3939 | 0:8ba6230eefbd | 238 | { |
okini3939 | 0:8ba6230eefbd | 239 | mad_timer_t addend; |
okini3939 | 0:8ba6230eefbd | 240 | unsigned long factor; |
okini3939 | 0:8ba6230eefbd | 241 | |
okini3939 | 0:8ba6230eefbd | 242 | factor = scalar; |
okini3939 | 0:8ba6230eefbd | 243 | if (scalar < 0) { |
okini3939 | 0:8ba6230eefbd | 244 | factor = -scalar; |
okini3939 | 0:8ba6230eefbd | 245 | mad_timer_negate(timer); |
okini3939 | 0:8ba6230eefbd | 246 | } |
okini3939 | 0:8ba6230eefbd | 247 | |
okini3939 | 0:8ba6230eefbd | 248 | addend = *timer; |
okini3939 | 0:8ba6230eefbd | 249 | *timer = mad_timer_zero; |
okini3939 | 0:8ba6230eefbd | 250 | |
okini3939 | 0:8ba6230eefbd | 251 | while (factor) { |
okini3939 | 0:8ba6230eefbd | 252 | if (factor & 1) |
okini3939 | 0:8ba6230eefbd | 253 | mad_timer_add(timer, addend); |
okini3939 | 0:8ba6230eefbd | 254 | |
okini3939 | 0:8ba6230eefbd | 255 | mad_timer_add(&addend, addend); |
okini3939 | 0:8ba6230eefbd | 256 | factor >>= 1; |
okini3939 | 0:8ba6230eefbd | 257 | } |
okini3939 | 0:8ba6230eefbd | 258 | } |
okini3939 | 0:8ba6230eefbd | 259 | |
okini3939 | 0:8ba6230eefbd | 260 | /* |
okini3939 | 0:8ba6230eefbd | 261 | * NAME: timer->count() |
okini3939 | 0:8ba6230eefbd | 262 | * DESCRIPTION: return timer value in selected units |
okini3939 | 0:8ba6230eefbd | 263 | */ |
okini3939 | 0:8ba6230eefbd | 264 | signed long mad_timer_count(mad_timer_t timer, enum mad_units units) |
okini3939 | 0:8ba6230eefbd | 265 | { |
okini3939 | 0:8ba6230eefbd | 266 | switch (units) { |
okini3939 | 0:8ba6230eefbd | 267 | case MAD_UNITS_HOURS: |
okini3939 | 0:8ba6230eefbd | 268 | return timer.seconds / 60 / 60; |
okini3939 | 0:8ba6230eefbd | 269 | |
okini3939 | 0:8ba6230eefbd | 270 | case MAD_UNITS_MINUTES: |
okini3939 | 0:8ba6230eefbd | 271 | return timer.seconds / 60; |
okini3939 | 0:8ba6230eefbd | 272 | |
okini3939 | 0:8ba6230eefbd | 273 | case MAD_UNITS_SECONDS: |
okini3939 | 0:8ba6230eefbd | 274 | return timer.seconds; |
okini3939 | 0:8ba6230eefbd | 275 | |
okini3939 | 0:8ba6230eefbd | 276 | case MAD_UNITS_DECISECONDS: |
okini3939 | 0:8ba6230eefbd | 277 | case MAD_UNITS_CENTISECONDS: |
okini3939 | 0:8ba6230eefbd | 278 | case MAD_UNITS_MILLISECONDS: |
okini3939 | 0:8ba6230eefbd | 279 | |
okini3939 | 0:8ba6230eefbd | 280 | case MAD_UNITS_8000_HZ: |
okini3939 | 0:8ba6230eefbd | 281 | case MAD_UNITS_11025_HZ: |
okini3939 | 0:8ba6230eefbd | 282 | case MAD_UNITS_12000_HZ: |
okini3939 | 0:8ba6230eefbd | 283 | case MAD_UNITS_16000_HZ: |
okini3939 | 0:8ba6230eefbd | 284 | case MAD_UNITS_22050_HZ: |
okini3939 | 0:8ba6230eefbd | 285 | case MAD_UNITS_24000_HZ: |
okini3939 | 0:8ba6230eefbd | 286 | case MAD_UNITS_32000_HZ: |
okini3939 | 0:8ba6230eefbd | 287 | case MAD_UNITS_44100_HZ: |
okini3939 | 0:8ba6230eefbd | 288 | case MAD_UNITS_48000_HZ: |
okini3939 | 0:8ba6230eefbd | 289 | |
okini3939 | 0:8ba6230eefbd | 290 | case MAD_UNITS_24_FPS: |
okini3939 | 0:8ba6230eefbd | 291 | case MAD_UNITS_25_FPS: |
okini3939 | 0:8ba6230eefbd | 292 | case MAD_UNITS_30_FPS: |
okini3939 | 0:8ba6230eefbd | 293 | case MAD_UNITS_48_FPS: |
okini3939 | 0:8ba6230eefbd | 294 | case MAD_UNITS_50_FPS: |
okini3939 | 0:8ba6230eefbd | 295 | case MAD_UNITS_60_FPS: |
okini3939 | 0:8ba6230eefbd | 296 | case MAD_UNITS_75_FPS: |
okini3939 | 0:8ba6230eefbd | 297 | return timer.seconds * (signed long) units + |
okini3939 | 0:8ba6230eefbd | 298 | (signed long) scale_rational(timer.fraction, MAD_TIMER_RESOLUTION, |
okini3939 | 0:8ba6230eefbd | 299 | units); |
okini3939 | 0:8ba6230eefbd | 300 | |
okini3939 | 0:8ba6230eefbd | 301 | case MAD_UNITS_23_976_FPS: |
okini3939 | 0:8ba6230eefbd | 302 | case MAD_UNITS_24_975_FPS: |
okini3939 | 0:8ba6230eefbd | 303 | case MAD_UNITS_29_97_FPS: |
okini3939 | 0:8ba6230eefbd | 304 | case MAD_UNITS_47_952_FPS: |
okini3939 | 0:8ba6230eefbd | 305 | case MAD_UNITS_49_95_FPS: |
okini3939 | 0:8ba6230eefbd | 306 | case MAD_UNITS_59_94_FPS: |
okini3939 | 0:8ba6230eefbd | 307 | return (mad_timer_count(timer, (enum mad_units)-units) + 1) * 1000 / 1001; |
okini3939 | 0:8ba6230eefbd | 308 | } |
okini3939 | 0:8ba6230eefbd | 309 | |
okini3939 | 0:8ba6230eefbd | 310 | /* unsupported units */ |
okini3939 | 0:8ba6230eefbd | 311 | return 0; |
okini3939 | 0:8ba6230eefbd | 312 | } |
okini3939 | 0:8ba6230eefbd | 313 | |
okini3939 | 0:8ba6230eefbd | 314 | /* |
okini3939 | 0:8ba6230eefbd | 315 | * NAME: timer->fraction() |
okini3939 | 0:8ba6230eefbd | 316 | * DESCRIPTION: return fractional part of timer in arbitrary terms |
okini3939 | 0:8ba6230eefbd | 317 | */ |
okini3939 | 0:8ba6230eefbd | 318 | unsigned long mad_timer_fraction(mad_timer_t timer, unsigned long denom) |
okini3939 | 0:8ba6230eefbd | 319 | { |
okini3939 | 0:8ba6230eefbd | 320 | timer = mad_timer_abs(timer); |
okini3939 | 0:8ba6230eefbd | 321 | |
okini3939 | 0:8ba6230eefbd | 322 | switch (denom) { |
okini3939 | 0:8ba6230eefbd | 323 | case 0: |
okini3939 | 0:8ba6230eefbd | 324 | return timer.fraction ? |
okini3939 | 0:8ba6230eefbd | 325 | MAD_TIMER_RESOLUTION / timer.fraction : MAD_TIMER_RESOLUTION + 1; |
okini3939 | 0:8ba6230eefbd | 326 | |
okini3939 | 0:8ba6230eefbd | 327 | case MAD_TIMER_RESOLUTION: |
okini3939 | 0:8ba6230eefbd | 328 | return timer.fraction; |
okini3939 | 0:8ba6230eefbd | 329 | |
okini3939 | 0:8ba6230eefbd | 330 | default: |
okini3939 | 0:8ba6230eefbd | 331 | return scale_rational(timer.fraction, MAD_TIMER_RESOLUTION, denom); |
okini3939 | 0:8ba6230eefbd | 332 | } |
okini3939 | 0:8ba6230eefbd | 333 | } |
okini3939 | 0:8ba6230eefbd | 334 | |
okini3939 | 0:8ba6230eefbd | 335 | /* |
okini3939 | 0:8ba6230eefbd | 336 | * NAME: timer->string() |
okini3939 | 0:8ba6230eefbd | 337 | * DESCRIPTION: write a string representation of a timer using a template |
okini3939 | 0:8ba6230eefbd | 338 | */ |
okini3939 | 0:8ba6230eefbd | 339 | void mad_timer_string(mad_timer_t timer, |
okini3939 | 0:8ba6230eefbd | 340 | char *dest, char const *format, enum mad_units units, |
okini3939 | 0:8ba6230eefbd | 341 | enum mad_units fracunits, unsigned long subparts) |
okini3939 | 0:8ba6230eefbd | 342 | { |
okini3939 | 0:8ba6230eefbd | 343 | unsigned long hours, minutes, seconds, sub; |
okini3939 | 0:8ba6230eefbd | 344 | unsigned int frac; |
okini3939 | 0:8ba6230eefbd | 345 | |
okini3939 | 0:8ba6230eefbd | 346 | timer = mad_timer_abs(timer); |
okini3939 | 0:8ba6230eefbd | 347 | |
okini3939 | 0:8ba6230eefbd | 348 | seconds = timer.seconds; |
okini3939 | 0:8ba6230eefbd | 349 | frac = sub = 0; |
okini3939 | 0:8ba6230eefbd | 350 | |
okini3939 | 0:8ba6230eefbd | 351 | switch (fracunits) { |
okini3939 | 0:8ba6230eefbd | 352 | case MAD_UNITS_HOURS: |
okini3939 | 0:8ba6230eefbd | 353 | case MAD_UNITS_MINUTES: |
okini3939 | 0:8ba6230eefbd | 354 | case MAD_UNITS_SECONDS: |
okini3939 | 0:8ba6230eefbd | 355 | break; |
okini3939 | 0:8ba6230eefbd | 356 | |
okini3939 | 0:8ba6230eefbd | 357 | case MAD_UNITS_DECISECONDS: |
okini3939 | 0:8ba6230eefbd | 358 | case MAD_UNITS_CENTISECONDS: |
okini3939 | 0:8ba6230eefbd | 359 | case MAD_UNITS_MILLISECONDS: |
okini3939 | 0:8ba6230eefbd | 360 | |
okini3939 | 0:8ba6230eefbd | 361 | case MAD_UNITS_8000_HZ: |
okini3939 | 0:8ba6230eefbd | 362 | case MAD_UNITS_11025_HZ: |
okini3939 | 0:8ba6230eefbd | 363 | case MAD_UNITS_12000_HZ: |
okini3939 | 0:8ba6230eefbd | 364 | case MAD_UNITS_16000_HZ: |
okini3939 | 0:8ba6230eefbd | 365 | case MAD_UNITS_22050_HZ: |
okini3939 | 0:8ba6230eefbd | 366 | case MAD_UNITS_24000_HZ: |
okini3939 | 0:8ba6230eefbd | 367 | case MAD_UNITS_32000_HZ: |
okini3939 | 0:8ba6230eefbd | 368 | case MAD_UNITS_44100_HZ: |
okini3939 | 0:8ba6230eefbd | 369 | case MAD_UNITS_48000_HZ: |
okini3939 | 0:8ba6230eefbd | 370 | |
okini3939 | 0:8ba6230eefbd | 371 | case MAD_UNITS_24_FPS: |
okini3939 | 0:8ba6230eefbd | 372 | case MAD_UNITS_25_FPS: |
okini3939 | 0:8ba6230eefbd | 373 | case MAD_UNITS_30_FPS: |
okini3939 | 0:8ba6230eefbd | 374 | case MAD_UNITS_48_FPS: |
okini3939 | 0:8ba6230eefbd | 375 | case MAD_UNITS_50_FPS: |
okini3939 | 0:8ba6230eefbd | 376 | case MAD_UNITS_60_FPS: |
okini3939 | 0:8ba6230eefbd | 377 | case MAD_UNITS_75_FPS: |
okini3939 | 0:8ba6230eefbd | 378 | { |
okini3939 | 0:8ba6230eefbd | 379 | unsigned long denom; |
okini3939 | 0:8ba6230eefbd | 380 | |
okini3939 | 0:8ba6230eefbd | 381 | denom = MAD_TIMER_RESOLUTION / fracunits; |
okini3939 | 0:8ba6230eefbd | 382 | |
okini3939 | 0:8ba6230eefbd | 383 | frac = timer.fraction / denom; |
okini3939 | 0:8ba6230eefbd | 384 | sub = scale_rational(timer.fraction % denom, denom, subparts); |
okini3939 | 0:8ba6230eefbd | 385 | } |
okini3939 | 0:8ba6230eefbd | 386 | break; |
okini3939 | 0:8ba6230eefbd | 387 | |
okini3939 | 0:8ba6230eefbd | 388 | case MAD_UNITS_23_976_FPS: |
okini3939 | 0:8ba6230eefbd | 389 | case MAD_UNITS_24_975_FPS: |
okini3939 | 0:8ba6230eefbd | 390 | case MAD_UNITS_29_97_FPS: |
okini3939 | 0:8ba6230eefbd | 391 | case MAD_UNITS_47_952_FPS: |
okini3939 | 0:8ba6230eefbd | 392 | case MAD_UNITS_49_95_FPS: |
okini3939 | 0:8ba6230eefbd | 393 | case MAD_UNITS_59_94_FPS: |
okini3939 | 0:8ba6230eefbd | 394 | /* drop-frame encoding */ |
okini3939 | 0:8ba6230eefbd | 395 | /* N.B. this is only well-defined for MAD_UNITS_29_97_FPS */ |
okini3939 | 0:8ba6230eefbd | 396 | { |
okini3939 | 0:8ba6230eefbd | 397 | unsigned long frame, cycle, d, m; |
okini3939 | 0:8ba6230eefbd | 398 | |
okini3939 | 0:8ba6230eefbd | 399 | frame = mad_timer_count(timer, fracunits); |
okini3939 | 0:8ba6230eefbd | 400 | |
okini3939 | 0:8ba6230eefbd | 401 | cycle = -fracunits * 60 * 10 - (10 - 1) * 2; |
okini3939 | 0:8ba6230eefbd | 402 | |
okini3939 | 0:8ba6230eefbd | 403 | d = frame / cycle; |
okini3939 | 0:8ba6230eefbd | 404 | m = frame % cycle; |
okini3939 | 0:8ba6230eefbd | 405 | frame += (10 - 1) * 2 * d; |
okini3939 | 0:8ba6230eefbd | 406 | if (m > 2) |
okini3939 | 0:8ba6230eefbd | 407 | frame += 2 * ((m - 2) / (cycle / 10)); |
okini3939 | 0:8ba6230eefbd | 408 | |
okini3939 | 0:8ba6230eefbd | 409 | frac = frame % -fracunits; |
okini3939 | 0:8ba6230eefbd | 410 | seconds = frame / -fracunits; |
okini3939 | 0:8ba6230eefbd | 411 | } |
okini3939 | 0:8ba6230eefbd | 412 | break; |
okini3939 | 0:8ba6230eefbd | 413 | } |
okini3939 | 0:8ba6230eefbd | 414 | |
okini3939 | 0:8ba6230eefbd | 415 | switch (units) { |
okini3939 | 0:8ba6230eefbd | 416 | case MAD_UNITS_HOURS: |
okini3939 | 0:8ba6230eefbd | 417 | minutes = seconds / 60; |
okini3939 | 0:8ba6230eefbd | 418 | hours = minutes / 60; |
okini3939 | 0:8ba6230eefbd | 419 | |
okini3939 | 0:8ba6230eefbd | 420 | sprintf(dest, format, |
okini3939 | 0:8ba6230eefbd | 421 | hours, |
okini3939 | 0:8ba6230eefbd | 422 | (unsigned int) (minutes % 60), |
okini3939 | 0:8ba6230eefbd | 423 | (unsigned int) (seconds % 60), |
okini3939 | 0:8ba6230eefbd | 424 | frac, sub); |
okini3939 | 0:8ba6230eefbd | 425 | break; |
okini3939 | 0:8ba6230eefbd | 426 | |
okini3939 | 0:8ba6230eefbd | 427 | case MAD_UNITS_MINUTES: |
okini3939 | 0:8ba6230eefbd | 428 | minutes = seconds / 60; |
okini3939 | 0:8ba6230eefbd | 429 | |
okini3939 | 0:8ba6230eefbd | 430 | sprintf(dest, format, |
okini3939 | 0:8ba6230eefbd | 431 | minutes, |
okini3939 | 0:8ba6230eefbd | 432 | (unsigned int) (seconds % 60), |
okini3939 | 0:8ba6230eefbd | 433 | frac, sub); |
okini3939 | 0:8ba6230eefbd | 434 | break; |
okini3939 | 0:8ba6230eefbd | 435 | |
okini3939 | 0:8ba6230eefbd | 436 | case MAD_UNITS_SECONDS: |
okini3939 | 0:8ba6230eefbd | 437 | sprintf(dest, format, |
okini3939 | 0:8ba6230eefbd | 438 | seconds, |
okini3939 | 0:8ba6230eefbd | 439 | frac, sub); |
okini3939 | 0:8ba6230eefbd | 440 | break; |
okini3939 | 0:8ba6230eefbd | 441 | |
okini3939 | 0:8ba6230eefbd | 442 | case MAD_UNITS_23_976_FPS: |
okini3939 | 0:8ba6230eefbd | 443 | case MAD_UNITS_24_975_FPS: |
okini3939 | 0:8ba6230eefbd | 444 | case MAD_UNITS_29_97_FPS: |
okini3939 | 0:8ba6230eefbd | 445 | case MAD_UNITS_47_952_FPS: |
okini3939 | 0:8ba6230eefbd | 446 | case MAD_UNITS_49_95_FPS: |
okini3939 | 0:8ba6230eefbd | 447 | case MAD_UNITS_59_94_FPS: |
okini3939 | 0:8ba6230eefbd | 448 | if (fracunits < 0) { |
okini3939 | 0:8ba6230eefbd | 449 | /* not yet implemented */ |
okini3939 | 0:8ba6230eefbd | 450 | sub = 0; |
okini3939 | 0:8ba6230eefbd | 451 | } |
okini3939 | 0:8ba6230eefbd | 452 | |
okini3939 | 0:8ba6230eefbd | 453 | /* fall through */ |
okini3939 | 0:8ba6230eefbd | 454 | |
okini3939 | 0:8ba6230eefbd | 455 | case MAD_UNITS_DECISECONDS: |
okini3939 | 0:8ba6230eefbd | 456 | case MAD_UNITS_CENTISECONDS: |
okini3939 | 0:8ba6230eefbd | 457 | case MAD_UNITS_MILLISECONDS: |
okini3939 | 0:8ba6230eefbd | 458 | |
okini3939 | 0:8ba6230eefbd | 459 | case MAD_UNITS_8000_HZ: |
okini3939 | 0:8ba6230eefbd | 460 | case MAD_UNITS_11025_HZ: |
okini3939 | 0:8ba6230eefbd | 461 | case MAD_UNITS_12000_HZ: |
okini3939 | 0:8ba6230eefbd | 462 | case MAD_UNITS_16000_HZ: |
okini3939 | 0:8ba6230eefbd | 463 | case MAD_UNITS_22050_HZ: |
okini3939 | 0:8ba6230eefbd | 464 | case MAD_UNITS_24000_HZ: |
okini3939 | 0:8ba6230eefbd | 465 | case MAD_UNITS_32000_HZ: |
okini3939 | 0:8ba6230eefbd | 466 | case MAD_UNITS_44100_HZ: |
okini3939 | 0:8ba6230eefbd | 467 | case MAD_UNITS_48000_HZ: |
okini3939 | 0:8ba6230eefbd | 468 | |
okini3939 | 0:8ba6230eefbd | 469 | case MAD_UNITS_24_FPS: |
okini3939 | 0:8ba6230eefbd | 470 | case MAD_UNITS_25_FPS: |
okini3939 | 0:8ba6230eefbd | 471 | case MAD_UNITS_30_FPS: |
okini3939 | 0:8ba6230eefbd | 472 | case MAD_UNITS_48_FPS: |
okini3939 | 0:8ba6230eefbd | 473 | case MAD_UNITS_50_FPS: |
okini3939 | 0:8ba6230eefbd | 474 | case MAD_UNITS_60_FPS: |
okini3939 | 0:8ba6230eefbd | 475 | case MAD_UNITS_75_FPS: |
okini3939 | 0:8ba6230eefbd | 476 | sprintf(dest, format, mad_timer_count(timer, units), sub); |
okini3939 | 0:8ba6230eefbd | 477 | break; |
okini3939 | 0:8ba6230eefbd | 478 | } |
okini3939 | 0:8ba6230eefbd | 479 | } |