From 5b5e421a8ef9318f08455f0aa30d1278e1e8ca9f Mon Sep 17 00:00:00 2001
From: Antonio Ospite <ospite@studenti.unina.it>
Date: Wed, 18 Dec 2013 00:15:44 +0100
Subject: [PATCH 1/1] Calculate the limit delay once and for all
---
fps-limit.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fps-limit.h b/fps-limit.h
index 376fb77..d19df1c 100644
--- a/fps-limit.h
+++ b/fps-limit.h
@@ -50,7 +50,7 @@
struct fps_limit_stats {
struct timespec time_start;
struct timespec time_end;
- unsigned int fps;
+ unsigned int delay;
};
static void fps_limit_init(struct fps_limit_stats *stats, unsigned int fps)
@@ -60,7 +60,7 @@ static void fps_limit_init(struct fps_limit_stats *stats, unsigned int fps)
clock_gettime(CLOCK_MONOTONIC, &stats->time_start);
fps_limit_dbg("Init time: s: %ld, ns: %ld", stats->time_start.tv_sec, stats->time_start.tv_nsec);
- stats->fps = fps;
+ stats->delay = NSEC_PER_SEC / fps;
}
static void fps_limit_sleep(struct fps_limit_stats *stats)
@@ -75,11 +75,11 @@ static void fps_limit_sleep(struct fps_limit_stats *stats)
fps_limit_timespecsub(&stats->time_end, &stats->time_start, &elapsed);
fps_limit_dbg("Elapsed s: %ld ns: %ld", elapsed.tv_sec, elapsed.tv_nsec);
- if (elapsed.tv_sec == 0 && elapsed.tv_nsec < NSEC_PER_SEC / stats->fps) {
+ if (elapsed.tv_sec == 0 && elapsed.tv_nsec < stats->delay) {
struct timespec remaining = {0, 0};
/* remaining delay, _relative_ to time_end */
- remaining.tv_nsec = (NSEC_PER_SEC / stats->fps) - elapsed.tv_nsec;
+ remaining.tv_nsec = stats->delay - elapsed.tv_nsec;
fps_limit_dbg("Sleeping for: ns: %ld", remaining.tv_nsec);
clock_nanosleep(CLOCK_MONOTONIC, 0, &remaining, NULL);
--
2.1.4