[PATCH 1/3] mmdevapi: Support device ID paths in ActivateAudioInterfaceAsync

[Andrew Eikum]

Signed-off-by: Andrew Eikum 
---
 dlls/mmdevapi/main.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/dlls/mmdevapi/main.c b/dlls/mmdevapi/main.c
index eac1da28f18..e9453da5ad2 100644
--- a/dlls/mmdevapi/main.c
+++ b/dlls/mmdevapi/main.c
@@ -413,6 +413,7 @@ static HRESULT get_mmdevice_by_activatepath(const WCHAR *path, IMMDevice **mmdev

static const WCHAR DEVINTERFACE_AUDIO_RENDER_WSTR[] = L"{E6327CAD-DCEC-4949-AE8A-991E976A79D2}";
     static const WCHAR DEVINTERFACE_AUDIO_CAPTURE_WSTR[] = L"{2EEF81BE-33FA-4800-9670-1CD474972C3F}";
+    static const WCHAR MMDEV_PATH_PREFIX[] = L"\\?\SWD#MMDEVAPI#";

hr = MMDevEnum_Create(&IID_IMMDeviceEnumerator, (void**)&devenum);
     if (FAILED(hr)) {
@@ -424,8 +425,15 @@ static HRESULT get_mmdevice_by_activatepath(const WCHAR *path, IMMDevice **mmdev
         hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(devenum, eRender, eMultimedia, mmdev);
     } else if (!lstrcmpiW(path, DEVINTERFACE_AUDIO_CAPTURE_WSTR)){
         hr = IMMDeviceEnumerator_GetDefaultAudioEndpoint(devenum, eCapture, eMultimedia, mmdev);
+    } else if (!memcmp(path, MMDEV_PATH_PREFIX, sizeof(MMDEV_PATH_PREFIX) - sizeof(WCHAR))) {
+        WCHAR device_id[56]; // == strlen("{0.0.1.00000000}.{fd47d9cc-4218-4135-9ce2-0c195c87405b}") + 1
+
+        wcsncpy(device_id, path + (ARRAY_SIZE(MMDEV_PATH_PREFIX) - 1), ARRAY_SIZE(device_id));
+        device_id[ARRAY_SIZE(device_id) - 1] = 0;
+
+        hr = IMMDeviceEnumerator_GetDevice(devenum, device_id, mmdev);
     } else {
-        FIXME("How to map path to device id? %s\n", debugstr_w(path));
+        FIXME("Unrecognized device id format: %s\n", debugstr_w(path));
         hr = HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
     }