wasapi: Avoid enumerating DEVICE_STATE_NOTPRESENT devices.

Devices in this state are not visible in the Sound Control Panel or
other typical places in the OS audio UI, so there's little point in
including them in cubeb's device list.

On my test machine, this reduces the number of devices enumerated from
118 to 25 - reducing the cost of an initial cubeb_enumerate_devices from
~215ms to ~67ms (and a subsequent call from ~22ms to ~14ms).

1 files changed, 4 insertions, 2 deletions

diff --git a/src/cubeb_wasapi.cpp b/src/cubeb_wasapi.cpp
index fbdbdca..7e1c1e5 100644
--- a/src/cubeb_wasapi.cpp
+++ b/src/cubeb_wasapi.cpp
@@ -3359,8 +3359,10 @@ wasapi_enumerate_devices(cubeb * context, cubeb_device_type type,
     return CUBEB_ERROR;
   }
 
-  hr = enumerator->EnumAudioEndpoints(flow, DEVICE_STATEMASK_ALL,
-                                      collection.receive());
+  hr = enumerator->EnumAudioEndpoints(
+      flow,
+      DEVICE_STATE_ACTIVE | DEVICE_STATE_DISABLED | DEVICE_STATE_UNPLUGGED,
+      collection.receive());
   if (FAILED(hr)) {
     LOG("Could not enumerate audio endpoints: %lx", hr);
     return CUBEB_ERROR;