Add a backend callback to get the device time

The method should monotonically count the number of nanoseconds the device has
active contexts

1 files changed, 7 insertions, 1 deletions

diff --git a/Alc/null.c b/Alc/null.c
index 86726fc3..be760e7d 100644
--- a/Alc/null.c
+++ b/Alc/null.c
@@ -144,6 +144,11 @@ static ALCboolean null_open_capture(ALCdevice *device, const ALCchar *deviceName
     return ALC_FALSE;
 }
 
+static ALuint64 null_get_time(ALCdevice *Device)
+{
+    return Device->SamplesPlayed * 1000000000 / Device->Frequency;
+}
+
 
 BackendFuncs null_funcs = {
     null_open_playback,
@@ -155,7 +160,8 @@ BackendFuncs null_funcs = {
     NULL,
     NULL,
     NULL,
-    NULL
+    NULL,
+    null_get_time
 };
 
 void alc_null_init(BackendFuncs *func_list)