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u/sink: Ensure that image frames have monotonic timestamps

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Moses Turner 2022-09-18 14:25:21 -05:00 committed by Jakob Bornecrantz
parent 17e0c39df2
commit d48792d9a9
1 changed files with 13 additions and 4 deletions
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17
src/xrt/auxiliary/util/u_sink_force_genlock.c
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@ -47,6 +47,9 @@ struct u_sink_force_genlock
pthread_mutex_t mutex;
pthread_cond_t cond;
//! Timestamp of the last frameset we pushed.
int64_t last_ts;
//! Should we keep running?
//! currently, true upon startup, false as we're exiting.
bool running;
@ -137,10 +140,16 @@ force_genlock_mainloop(void *ptr)
frames[0]->timestamp = ts;
frames[1]->timestamp = ts;
// Send to the consumer, in left-right order.
xrt_sink_push_frame(q->consumer_left, frames[0]);
xrt_sink_push_frame(q->consumer_right, frames[1]);
if (ts == q->last_ts) {
U_LOG_W("Got an image frame with a duplicate timestamp! Old: %lu; New: %lu", q->last_ts, ts);
} else if (ts < q->last_ts) {
U_LOG_W("Got an image frame with a non-monotonically-increasing timestamp! Old: %lu; New: %lu",
q->last_ts, ts);
} else {
// Send to the consumer, in left-right order.
xrt_sink_push_frame(q->consumer_left, frames[0]);
xrt_sink_push_frame(q->consumer_right, frames[1]);
}
/*
* Drop our reference - we don't need it anymore. If the consumer wants to keep it, they will have
* referenced it in their push_frame handler.