Add a device method to retrieve the active latency

This is effectively the time until the next update will be heard by the user,
or the closest approximation thereof, in nanoseconds.

1 files changed, 9 insertions, 1 deletions

diff --git a/Alc/backends/opensl.c b/Alc/backends/opensl.c
index bf243e38..f2df0218 100644
--- a/Alc/backends/opensl.c
+++ b/Alc/backends/opensl.c
@@ -401,6 +401,13 @@ static void opensl_stop_playback(ALCdevice *Device)
 }
 
 
+static ALint64 opensl_get_latency(ALCdevice *device)
+{
+    (void)device;
+    return 0;
+}
+
+
 static const BackendFuncs opensl_funcs = {
     opensl_open_playback,
     opensl_close_playback,
@@ -412,7 +419,8 @@ static const BackendFuncs opensl_funcs = {
     NULL,
     NULL,
     NULL,
-    NULL
+    NULL,
+    opensl_get_latency
 };