Make Create methods for structs with flexible array members ...

... that are used with unique_ptr.

Alc/hrtf.cpp

@@ -47,9 +47,17 @@ struct HrtfHandle {
     HrtfEntry *entry{nullptr};
     char filename[];
 
+    static std::unique_ptr<HrtfHandle> Create(size_t fname_len);
+
     DEF_PLACE_NEWDEL()
 };
 
+std::unique_ptr<HrtfHandle> HrtfHandle::Create(size_t fname_len)
+{
+    void *ptr{al_calloc(DEF_ALIGN, FAM_SIZE(HrtfHandle, filename, fname_len))};
+    return std::unique_ptr<HrtfHandle>{new (ptr) HrtfHandle{}};
+}
+
 namespace {
 
 using HrtfHandlePtr = std::unique_ptr<HrtfHandle>;
@@ -273,6 +281,12 @@ void GetHrtfCoeffs(const HrtfEntry *Hrtf, ALfloat elevation, ALfloat azimuth, AL
 }
 
 
+std::unique_ptr<DirectHrtfState> DirectHrtfState::Create(ALsizei num_chans)
+{
+    void *ptr{al_calloc(16, FAM_SIZE(DirectHrtfState, Chan, num_chans))};
+    return std::unique_ptr<DirectHrtfState>{new (ptr) DirectHrtfState{}};
+}
+
 void BuildBFormatHrtf(const HrtfEntry *Hrtf, DirectHrtfState *state, const ALsizei NumChannels, const AngularPoint *AmbiPoints, const ALfloat (*RESTRICT AmbiMatrix)[MAX_AMBI_COEFFS], const ALsizei AmbiCount, const ALfloat *RESTRICT AmbiOrderHFGain)
 {
     static constexpr int OrderFromChan[MAX_AMBI_COEFFS]{
@@ -980,9 +994,7 @@ void AddFileEntry(al::vector<EnumeratedHrtf> &list, const std::string &filename)
     {
         TRACE("Got new file \"%s\"\n", filename.c_str());
 
-        LoadedHrtfs.emplace_back(HrtfHandlePtr{new
-            (al_calloc(DEF_ALIGN, FAM_SIZE(HrtfHandle, filename, filename.length()+1)))
-            HrtfHandle{}});
+        LoadedHrtfs.emplace_back(HrtfHandle::Create(filename.length()+1));
         loaded_entry = LoadedHrtfs.end()-1;
         strcpy((*loaded_entry)->filename, filename.c_str());
     }
@@ -1042,9 +1054,7 @@ void AddBuiltInEntry(al::vector<EnumeratedHrtf> &list, const std::string &filena
 
         TRACE("Got new file \"%s\"\n", filename.c_str());
 
-        LoadedHrtfs.emplace_back(HrtfHandlePtr{new
-            (al_calloc(DEF_ALIGN, FAM_SIZE(HrtfHandle, filename, namelen)))
-            HrtfHandle{}});
+        LoadedHrtfs.emplace_back(HrtfHandle::Create(namelen));
         loaded_entry = LoadedHrtfs.end()-1;
         snprintf((*loaded_entry)->filename, namelen,  "!%u_%s",
                  residx, filename.c_str());

Alc/hrtf.h

@@ -1,6 +1,7 @@
 #ifndef ALC_HRTF_H
 #define ALC_HRTF_H
 
+#include <memory>
 #include <string>
 
 #include "AL/al.h"
@@ -64,6 +65,7 @@ struct DirectHrtfState {
     } Chan[];
 
     DirectHrtfState() noexcept { }
+    static std::unique_ptr<DirectHrtfState> Create(ALsizei num_chans);
 
     DEF_PLACE_NEWDEL()
 };

Alc/panning.cpp

@@ -697,8 +697,7 @@ void InitHrtfPanning(ALCdevice *device)
         count = static_cast<ALsizei>(COUNTOF(IndexMap));
     }
 
-    device->mHrtfState.reset(
-        new (al_calloc(16, FAM_SIZE(DirectHrtfState, Chan, count))) DirectHrtfState{});
+    device->mHrtfState = DirectHrtfState::Create(count);
 
     std::transform(std::begin(IndexMap), std::begin(IndexMap)+count, std::begin(device->Dry.AmbiMap),
         [](const ALsizei &index) noexcept { return BFChannelConfig{1.0f, index}; }