diff options
| -rw-r--r-- | stable/presentation-time/presentation-time.xml | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/stable/presentation-time/presentation-time.xml b/stable/presentation-time/presentation-time.xml index b8de4ca..2e68da6 100644 --- a/stable/presentation-time/presentation-time.xml +++ b/stable/presentation-time/presentation-time.xml @@ -232,6 +232,10 @@ targeting the next few vblanks. If such prediction cannot usefully be done, the argument is zero. + If the output does not have a constant refresh rate, explicit + video mode switches excluded, then the refresh argument must + be zero. + The 64-bit value combined from seq_hi and seq_lo is the value of the output's vertical retrace counter when the content update was first scanned out to the display. This value must @@ -240,10 +244,6 @@ path has a non-zero latency, the time instant specified by this counter may differ from the timestamp's. - If the output does not have a constant refresh rate, explicit - video mode switches excluded, then the refresh argument must - be zero. - If the output does not have a concept of vertical retrace or a refresh cycle, or the output device is self-refreshing without a way to query the refresh count, then the arguments seq_hi |