Use a standard string for the device's HRTF name

Alc/alc.cpp

@@ -2436,8 +2436,6 @@ ALCdevice_struct::~ALCdevice_struct()
     VECTOR_DEINIT(FilterList);
     almtx_destroy(&FilterLock);
 
-    al_free(HrtfName);
-    HrtfName = nullptr;
     FreeHrtfList(HrtfList);
     if(HrtfHandle)
         Hrtf_DecRef(HrtfHandle);
@@ -3049,7 +3047,7 @@ ALC_API const ALCchar* ALC_APIENTRY alcGetString(ALCdevice *Device, ALCenum para
         else
         {
             almtx_lock(&Device->BackendLock);
-            value = ((Device->HrtfHandle && Device->HrtfName) ? Device->HrtfName : "");
+            value = (Device->HrtfHandle ? Device->HrtfName.c_str() : "");
             almtx_unlock(&Device->BackendLock);
             ALCdevice_DecRef(Device);
         }

Alc/panning.cpp

@@ -933,8 +933,7 @@ void aluInitRenderer(ALCdevice *device, ALint hrtf_id, enum HrtfRequestMode hrtf
     al_free(device->Hrtf);
     device->Hrtf = NULL;
     device->HrtfHandle = NULL;
-    al_free(device->HrtfName);
-    device->HrtfName = NULL;
+    device->HrtfName.clear();
     device->Render_Mode = NormalRender;
 
     memset(&device->Dry.Ambi, 0, sizeof(device->Dry.Ambi));
@@ -1114,7 +1113,7 @@ void aluInitRenderer(ALCdevice *device, ALint hrtf_id, enum HrtfRequestMode hrtf
         if(hrtf && hrtf->sampleRate == device->Frequency)
         {
             device->HrtfHandle = hrtf;
-            device->HrtfName = alstrdup(entry.name);
+            device->HrtfName = entry.name;
         }
         else if(hrtf)
             Hrtf_DecRef(hrtf);
@@ -1127,7 +1126,7 @@ void aluInitRenderer(ALCdevice *device, ALint hrtf_id, enum HrtfRequestMode hrtf
         if(hrtf && hrtf->sampleRate == device->Frequency)
         {
             device->HrtfHandle = hrtf;
-            device->HrtfName = alstrdup(entry.name);
+            device->HrtfName = entry.name;
         }
         else if(hrtf)
             Hrtf_DecRef(hrtf);
@@ -1164,7 +1163,7 @@ void aluInitRenderer(ALCdevice *device, ALint hrtf_id, enum HrtfRequestMode hrtf
         }
 
         TRACE("%s HRTF rendering enabled, using \"%s\"\n",
-            ((device->Render_Mode == HrtfRender) ? "Full" : "Basic"), device->HrtfName
+            ((device->Render_Mode == HrtfRender) ? "Full" : "Basic"), device->HrtfName.c_str()
         );
         InitHrtfPanning(device);
         return;

OpenAL32/Include/alMain.h

@@ -621,7 +621,7 @@ struct ALCdevice_struct {
 
     /* HRTF state and info */
     struct DirectHrtfState *Hrtf{nullptr};
-    char *HrtfName{nullptr};
+    std::string HrtfName;
     struct Hrtf *HrtfHandle{nullptr};
     al::vector<EnumeratedHrtf> HrtfList;
     ALCenum HrtfStatus{ALC_FALSE};