diff options
| author | Hagen Fritsch <fritsch+git@in.tum.de> | 2013-02-24 18:19:55 +0100 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2013-02-27 19:47:28 +0100 |
| commit | 6f4bb6cd2c43b1be330d24867158e4334f69ab3f (patch) | |
| tree | fb80c875052b1e926bbed18146c7c79b7fed5347 | |
| parent | 2cf31e905b445fe4dbcea5fc194b69dcb46c3210 (diff) | |
| download | mpd-6f4bb6cd2c43b1be330d24867158e4334f69ab3f.tar.gz mpd-6f4bb6cd2c43b1be330d24867158e4334f69ab3f.tar.xz mpd-6f4bb6cd2c43b1be330d24867158e4334f69ab3f.zip | |
Add some comments to keep track of timer units.
| -rw-r--r-- | src/timer.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/timer.c b/src/timer.c index 2d9550706..9a3228465 100644 --- a/src/timer.c +++ b/src/timer.c @@ -31,9 +31,9 @@ struct timer *timer_new(const struct audio_format *af) { struct timer *timer = g_new(struct timer, 1); - timer->time = 0; - timer->started = 0; - timer->rate = af->sample_rate * audio_format_frame_size(af); + timer->time = 0; // us + timer->started = 0; // false + timer->rate = af->sample_rate * audio_format_frame_size(af); // samples per second return timer; } @@ -59,6 +59,8 @@ void timer_add(struct timer *timer, int size) { assert(timer->started); + // (size samples) / (rate samples per second) = duration seconds + // duration seconds * 1000000 = duration us timer->time += ((uint64_t)size * 1000000) / timer->rate; } |