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deps/media-playback: Less accurate sleep

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Avoid busy-wait for media sources by not caring about sleep precision.

Reduces CPU usage in status bar from 1.1% to 0.8% on my machine.
This commit is contained in:
jpark37 2021-08-10 23:13:16 -07:00 committed by Jim
parent 5457524f5a
commit 976d76dfbd
1 changed files with 11 additions and 10 deletions
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21
deps/media-playback/media-playback/media.c vendored
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@ -540,21 +540,22 @@ static bool mp_media_reset(mp_media_t *m)
return true;
}
static inline bool mp_media_sleepto(mp_media_t *m)
static inline bool mp_media_sleep(mp_media_t *m)
{
bool timeout = false;
if (!m->next_ns) {
m->next_ns = os_gettime_ns();
} else {
uint64_t t = os_gettime_ns();
const uint64_t timeout_ns = 200000000;
if (m->next_ns > t && (m->next_ns - t) > timeout_ns) {
os_sleepto_ns(t + timeout_ns);
timeout = true;
} else {
os_sleepto_ns(m->next_ns);
const uint64_t t = os_gettime_ns();
if (m->next_ns > t) {
const uint32_t delta_ms =
(uint32_t)((m->next_ns - t + 500000) / 1000000);
if (delta_ms > 0) {
static const uint32_t timeout_ms = 200;
timeout = delta_ms > timeout_ms;
os_sleep_ms(timeout ? timeout_ms : delta_ms);
}
}
}
@ -695,7 +696,7 @@ static inline bool mp_media_thread(mp_media_t *m)
if (pause)
reset_ts(m);
} else {
timeout = mp_media_sleepto(m);
timeout = mp_media_sleep(m);
}
pthread_mutex_lock(&m->mutex);