[PATCH v2 2/2] winepulse: Add support for containerId property from sysfs path

[Claire Girka]

From: Claire Girka

---
 dlls/winepulse.drv/mmdevdrv.c |  5 ++++
 dlls/winepulse.drv/pulse.c    | 55 +++++++++++++++++++++++++++++++++++
 dlls/winepulse.drv/unixlib.h  |  1 +
 3 files changed, 61 insertions(+)

diff --git a/dlls/winepulse.drv/mmdevdrv.c b/dlls/winepulse.drv/mmdevdrv.c
index 446354fb9a5..1ac9ee1e0a8 100644
--- a/dlls/winepulse.drv/mmdevdrv.c
+++ b/dlls/winepulse.drv/mmdevdrv.c
@@ -2681,6 +2681,11 @@ HRESULT WINAPI AUDDRV_GetPropValue(GUID *guid, const PROPERTYKEY *prop, PROPVARI
             return E_OUTOFMEMORY;
         memcpy(out->pwszVal, params.wstr, size);
         break;
+    case VT_CLSID:
+        if (!(out->puuid = CoTaskMemAlloc(sizeof(GUID))))
+            return E_OUTOFMEMORY;
+        memcpy(out->puuid, &params.uuid, sizeof(GUID));
+        break;
     case VT_UI4:
         out->ulVal = params.ulVal;
         break;
diff --git a/dlls/winepulse.drv/pulse.c b/dlls/winepulse.drv/pulse.c
index 268d59a71ab..1be3ae38771 100644
--- a/dlls/winepulse.drv/pulse.c
+++ b/dlls/winepulse.drv/pulse.c
@@ -41,6 +41,8 @@

#include "wine/debug.h"

+#include "devpkey.h"
+
 WINE_DEFAULT_DEBUG_CHANNEL(pulse);

struct pulse_stream
@@ -2301,6 +2303,55 @@ static BOOL get_device_path(PhysDevice *dev, struct get_prop_value_params *param
     return TRUE;
 }

+static BOOL get_device_container(PhysDevice *dev, struct get_prop_value_params *params)
+{
+    char buffer[10];
+    char *path, *p;
+
+    if (dev->sysfs_path == NULL)
+        return FALSE;
+
+    path = malloc(strlen(dev->sysfs_path) + strlen("/sys") + strlen("/removable") + 1);
+    strcpy(path, "/sys");
+    strcat(path, dev->sysfs_path);
+
+    while ((p = strrchr(path, '/'))) {
+        FILE *f;
+
+        strcpy(p, "/removable");
+        f = fopen(path, "r");
+        *p = 0;
+
+        if (f) {
+            if (fgets(buffer, 10, f)) {
+                if (strcmp(buffer, "fixed") != 0) {
+                    /* It's a potentially removable device, so treat it as a container */
+                    fclose(f);
+                    break;
+                }
+            }
+            fclose(f);
+        }
+    }
+
+    if (p && (p - path) > 4) {
+        char *guid = (char*) &params->uuid;
+        memset(&params->uuid, 0, sizeof(GUID));
+
+        for (int i = strlen(path); i > 4; i--) {
+          guid[i % 16] ^= path[i];
+        }
+
+        params->vt = VT_CLSID;
+
+        free(path);
+        return TRUE;
+    }
+
+    free(path);
+    return FALSE;
+}
+
 static NTSTATUS pulse_get_prop_value(void *args)
 {
     static const GUID PKEY_AudioEndpoint_GUID = {
@@ -2321,6 +2372,10 @@ static NTSTATUS pulse_get_prop_value(void *args)
             if (!get_device_path(dev, params))
                 break;
             return STATUS_SUCCESS;
+        } else if (IsEqualPropertyKey(*params->prop, DEVPKEY_Device_ContainerId)) {
+            if (!get_device_container(dev, params))
+                break;
+            return STATUS_SUCCESS;
         } else if (IsEqualGUID(&params->prop->fmtid, &PKEY_AudioEndpoint_GUID)) {
             switch (params->prop->pid) {
             case 0:   /* FormFactor */
diff --git a/dlls/winepulse.drv/unixlib.h b/dlls/winepulse.drv/unixlib.h
index 1481a5db4b8..b13048369ef 100644
--- a/dlls/winepulse.drv/unixlib.h
+++ b/dlls/winepulse.drv/unixlib.h
@@ -227,6 +227,7 @@ struct get_prop_value_params
     union
     {
         WCHAR wstr[128];
+        GUID  uuid;
         ULONG ulVal;
     };
 };