From 693dc378518552cf84fad13b822efb76fd42c943 Mon Sep 17 00:00:00 2001 From: "J. Alexander Treuman" Date: Wed, 30 May 2007 18:16:35 +0000 Subject: Move the timing code from the null plugin to timer.c, so it can be easily used in other plugins (fifo, shout, etc.). git-svn-id: https://svn.musicpd.org/mpd/trunk@6397 09075e82-0dd4-0310-85a5-a0d7c8717e4f --- src/timer.c | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 src/timer.c (limited to 'src/timer.c') diff --git a/src/timer.c b/src/timer.c new file mode 100644 index 00000000..0406a945 --- /dev/null +++ b/src/timer.c @@ -0,0 +1,80 @@ +/* the Music Player Daemon (MPD) + * Copyright (C) 2007 by Warren Dukes (warren.dukes@gmail.com) + * This project's homepage is: http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "timer.h" +#include "utils.h" + +#include +#include +#include + +static uint64_t now(void) +{ + struct timeval tv; + + gettimeofday(&tv, NULL); + + return ((uint64_t)tv.tv_sec * 1000000) + tv.tv_usec; +} + +Timer *timer_new(AudioFormat *af) +{ + Timer *timer; + + timer = xmalloc(sizeof(Timer)); + timer->time = 0; + timer->started = 0; + timer->rate = af->sampleRate * (af->bits / CHAR_BIT) * af->channels; + + return timer; +} + +void timer_free(Timer *timer) +{ + free(timer); +} + +void timer_start(Timer *timer) +{ + timer->time = now(); + timer->started = 1; +} + +void timer_reset(Timer *timer) +{ + timer->time = 0; + timer->started = 0; +} + +void timer_add(Timer *timer, int size) +{ + assert(timer->started); + + timer->time += ((uint64_t)size * 1000000) / timer->rate; +} + +void timer_sync(Timer *timer) +{ + int64_t sleep; + + assert(timer->started); + + sleep = timer->time - now(); + if (sleep > 0) + my_usleep(sleep); +} -- cgit v1.2.3