19 files changed, 96 insertions, 102 deletions

diff --git a/Alc/backends/alsa.cpp b/Alc/backends/alsa.cpp
index 97b2e965..2d0b3070 100644
--- a/Alc/backends/alsa.cpp
+++ b/Alc/backends/alsa.cpp
@@ -429,6 +429,8 @@ struct ALCplaybackAlsa final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCplaybackAlsa(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCplaybackAlsa_mixerProc(ALCplaybackAlsa *self);
@@ -451,8 +453,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCplaybackAlsa);
 
 void ALCplaybackAlsa_Construct(ALCplaybackAlsa *self, ALCdevice *device)
 {
-    new (self) ALCplaybackAlsa{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCplaybackAlsa{device};
     SET_VTABLE2(ALCplaybackAlsa, ALCbackend, self);
 }
 
@@ -462,7 +463,6 @@ void ALCplaybackAlsa_Destruct(ALCplaybackAlsa *self)
         snd_pcm_close(self->mPcmHandle);
     self->mPcmHandle = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCplaybackAlsa();
 }
 
@@ -932,6 +932,8 @@ struct ALCcaptureAlsa final : public ALCbackend {
     RingBufferPtr mRing{nullptr};
 
     snd_pcm_sframes_t mLastAvail{0};
+
+    ALCcaptureAlsa(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 void ALCcaptureAlsa_Construct(ALCcaptureAlsa *self, ALCdevice *device);
@@ -952,8 +954,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCcaptureAlsa);
 
 void ALCcaptureAlsa_Construct(ALCcaptureAlsa *self, ALCdevice *device)
 {
-    new (self) ALCcaptureAlsa{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCcaptureAlsa{device};
     SET_VTABLE2(ALCcaptureAlsa, ALCbackend, self);
 }
 
@@ -963,7 +964,6 @@ void ALCcaptureAlsa_Destruct(ALCcaptureAlsa *self)
         snd_pcm_close(self->mPcmHandle);
     self->mPcmHandle = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCcaptureAlsa();
 }
 
diff --git a/Alc/backends/base.cpp b/Alc/backends/base.cpp
index 85f4b034..021a0f17 100644
--- a/Alc/backends/base.cpp
+++ b/Alc/backends/base.cpp
@@ -26,14 +26,11 @@ ClockLatency GetClockLatency(ALCdevice *device)
 
 
 /* Base ALCbackend method implementations. */
-void ALCbackend_Construct(ALCbackend *self, ALCdevice *device)
-{
-    self->mDevice = device;
-}
+ALCbackend::ALCbackend(ALCdevice *device) noexcept : mDevice{device}
+{ }
 
-void ALCbackend_Destruct(ALCbackend* UNUSED(self))
-{
-}
+ALCbackend::~ALCbackend()
+{ }
 
 ALCboolean ALCbackend_reset(ALCbackend* UNUSED(self))
 {
diff --git a/Alc/backends/base.h b/Alc/backends/base.h
index 15622967..aaa2b037 100644
--- a/Alc/backends/base.h
+++ b/Alc/backends/base.h
@@ -41,10 +41,11 @@ struct ALCbackend {
     ALCdevice *mDevice;
 
     std::recursive_mutex mMutex;
+
+    ALCbackend(ALCdevice *device) noexcept;
+    virtual ~ALCbackend();
 };
 
-void ALCbackend_Construct(ALCbackend *self, ALCdevice *device);
-void ALCbackend_Destruct(ALCbackend *self);
 ALCboolean ALCbackend_reset(ALCbackend *self);
 ALCenum ALCbackend_captureSamples(ALCbackend *self, void *buffer, ALCuint samples);
 ALCuint ALCbackend_availableSamples(ALCbackend *self);
diff --git a/Alc/backends/coreaudio.cpp b/Alc/backends/coreaudio.cpp
index 8f4a8d2a..d0d0060c 100644
--- a/Alc/backends/coreaudio.cpp
+++ b/Alc/backends/coreaudio.cpp
@@ -44,6 +44,8 @@ struct ALCcoreAudioPlayback final : public ALCbackend {
 
     ALuint mFrameSize{0u};
     AudioStreamBasicDescription mFormat{}; // This is the OpenAL format as a CoreAudio ASBD
+
+    ALCcoreAudioPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static void ALCcoreAudioPlayback_Construct(ALCcoreAudioPlayback *self, ALCdevice *device);
@@ -64,8 +66,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCcoreAudioPlayback);
 
 static void ALCcoreAudioPlayback_Construct(ALCcoreAudioPlayback *self, ALCdevice *device)
 {
-    new (self) ALCcoreAudioPlayback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCcoreAudioPlayback{device};
     SET_VTABLE2(ALCcoreAudioPlayback, ALCbackend, self);
 }
 
@@ -74,7 +75,6 @@ static void ALCcoreAudioPlayback_Destruct(ALCcoreAudioPlayback *self)
     AudioUnitUninitialize(self->mAudioUnit);
     AudioComponentInstanceDispose(self->mAudioUnit);
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCcoreAudioPlayback();
 }
 
@@ -324,6 +324,8 @@ struct ALCcoreAudioCapture final : public ALCbackend {
     SampleConverterPtr mConverter;
 
     RingBufferPtr mRing{nullptr};
+
+    ALCcoreAudioCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static void ALCcoreAudioCapture_Construct(ALCcoreAudioCapture *self, ALCdevice *device);
@@ -344,8 +346,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCcoreAudioCapture);
 
 static void ALCcoreAudioCapture_Construct(ALCcoreAudioCapture *self, ALCdevice *device)
 {
-    new (self) ALCcoreAudioCapture{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCcoreAudioCapture{device};
     SET_VTABLE2(ALCcoreAudioCapture, ALCbackend, self);
 }
 
@@ -355,7 +356,6 @@ static void ALCcoreAudioCapture_Destruct(ALCcoreAudioCapture *self)
         AudioComponentInstanceDispose(self->mAudioUnit);
     self->mAudioUnit = 0;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCcoreAudioCapture();
 }
 
diff --git a/Alc/backends/dsound.cpp b/Alc/backends/dsound.cpp
index 19fe8053..7bfe79df 100644
--- a/Alc/backends/dsound.cpp
+++ b/Alc/backends/dsound.cpp
@@ -193,6 +193,8 @@ struct ALCdsoundPlayback final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCdsoundPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCdsoundPlayback_mixerProc(ALCdsoundPlayback *self);
@@ -215,8 +217,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCdsoundPlayback);
 
 void ALCdsoundPlayback_Construct(ALCdsoundPlayback *self, ALCdevice *device)
 {
-    new (self) ALCdsoundPlayback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCdsoundPlayback{device};
     SET_VTABLE2(ALCdsoundPlayback, ALCbackend, self);
 }
 
@@ -239,7 +240,6 @@ void ALCdsoundPlayback_Destruct(ALCdsoundPlayback *self)
         CloseHandle(self->mNotifyEvent);
     self->mNotifyEvent = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCdsoundPlayback();
 }
 
@@ -656,6 +656,8 @@ struct ALCdsoundCapture final : public ALCbackend {
     DWORD mCursor{0u};
 
     RingBufferPtr mRing;
+
+    ALCdsoundCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 void ALCdsoundCapture_Construct(ALCdsoundCapture *self, ALCdevice *device);
@@ -674,8 +676,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCdsoundCapture);
 
 void ALCdsoundCapture_Construct(ALCdsoundCapture *self, ALCdevice *device)
 {
-    new (self) ALCdsoundCapture{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCdsoundCapture{device};
     SET_VTABLE2(ALCdsoundCapture, ALCbackend, self);
 }
 
@@ -692,7 +693,6 @@ void ALCdsoundCapture_Destruct(ALCdsoundCapture *self)
         self->mDSC->Release();
     self->mDSC = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCdsoundCapture();
 }
 
diff --git a/Alc/backends/jack.cpp b/Alc/backends/jack.cpp
index ca537323..059f9c96 100644
--- a/Alc/backends/jack.cpp
+++ b/Alc/backends/jack.cpp
@@ -157,6 +157,8 @@ struct ALCjackPlayback final : public ALCbackend {
 
     std::atomic<bool> mKillNow{true};
     std::thread mThread;
+
+    ALCjackPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCjackPlayback_bufferSizeNotify(jack_nframes_t numframes, void *arg);
@@ -182,8 +184,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCjackPlayback);
 
 void ALCjackPlayback_Construct(ALCjackPlayback *self, ALCdevice *device)
 {
-    new (self) ALCjackPlayback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCjackPlayback{device};
     SET_VTABLE2(ALCjackPlayback, ALCbackend, self);
 }
 
@@ -200,7 +201,6 @@ void ALCjackPlayback_Destruct(ALCjackPlayback *self)
         self->mClient = nullptr;
     }
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCjackPlayback();
 }
 
diff --git a/Alc/backends/loopback.cpp b/Alc/backends/loopback.cpp
index 65c87971..9291ae77 100644
--- a/Alc/backends/loopback.cpp
+++ b/Alc/backends/loopback.cpp
@@ -29,6 +29,7 @@
 namespace {
 
 struct ALCloopback final : public ALCbackend {
+    ALCloopback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 void ALCloopback_Construct(ALCloopback *self, ALCdevice *device);
@@ -48,14 +49,12 @@ DEFINE_ALCBACKEND_VTABLE(ALCloopback);
 
 void ALCloopback_Construct(ALCloopback *self, ALCdevice *device)
 {
-    new (self) ALCloopback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCloopback{device};
     SET_VTABLE2(ALCloopback, ALCbackend, self);
 }
 
 void ALCloopback_Destruct(ALCloopback *self)
 {
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCloopback();
 }
 
diff --git a/Alc/backends/null.cpp b/Alc/backends/null.cpp
index fb113077..2b2a4b84 100644
--- a/Alc/backends/null.cpp
+++ b/Alc/backends/null.cpp
@@ -47,6 +47,8 @@ constexpr ALCchar nullDevice[] = "No Output";
 struct ALCnullBackend final : public ALCbackend {
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCnullBackend(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCnullBackend_mixerProc(ALCnullBackend *self);
@@ -69,14 +71,12 @@ DEFINE_ALCBACKEND_VTABLE(ALCnullBackend);
 
 void ALCnullBackend_Construct(ALCnullBackend *self, ALCdevice *device)
 {
-    new (self) ALCnullBackend{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCnullBackend{device};
     SET_VTABLE2(ALCnullBackend, ALCbackend, self);
 }
 
 void ALCnullBackend_Destruct(ALCnullBackend *self)
 {
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCnullBackend();
 }
 
diff --git a/Alc/backends/opensl.cpp b/Alc/backends/opensl.cpp
index e1a0faa6..3aa2d267 100644
--- a/Alc/backends/opensl.cpp
+++ b/Alc/backends/opensl.cpp
@@ -152,6 +152,8 @@ struct ALCopenslPlayback final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCopenslPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static void ALCopenslPlayback_process(SLAndroidSimpleBufferQueueItf bq, void *context);
@@ -175,8 +177,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCopenslPlayback);
 
 static void ALCopenslPlayback_Construct(ALCopenslPlayback *self, ALCdevice *device)
 {
-    new (self) ALCopenslPlayback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCopenslPlayback{device};
     SET_VTABLE2(ALCopenslPlayback, ALCbackend, self);
 }
 
@@ -195,7 +196,6 @@ static void ALCopenslPlayback_Destruct(ALCopenslPlayback* self)
     self->mEngineObj = NULL;
     self->mEngine = NULL;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCopenslPlayback();
 }
 
@@ -660,6 +660,8 @@ struct ALCopenslCapture final : public ALCbackend {
     ALCuint mSplOffset{0u};
 
     ALsizei mFrameSize{0};
+
+    ALCopenslCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static void ALCopenslCapture_process(SLAndroidSimpleBufferQueueItf bq, void *context);
@@ -681,8 +683,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCopenslCapture);
 
 static void ALCopenslCapture_Construct(ALCopenslCapture *self, ALCdevice *device)
 {
-    new (self) ALCopenslCapture{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCopenslCapture{device};
     SET_VTABLE2(ALCopenslCapture, ALCbackend, self);
 }
 
@@ -697,7 +698,6 @@ static void ALCopenslCapture_Destruct(ALCopenslCapture *self)
     self->mEngineObj = NULL;
     self->mEngine = NULL;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCopenslCapture();
 }
 
diff --git a/Alc/backends/oss.cpp b/Alc/backends/oss.cpp
index ec9028eb..73b62b30 100644
--- a/Alc/backends/oss.cpp
+++ b/Alc/backends/oss.cpp
@@ -248,6 +248,8 @@ struct ALCplaybackOSS final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCplaybackOSS(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCplaybackOSS_mixerProc(ALCplaybackOSS *self);
@@ -269,8 +271,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCplaybackOSS);
 
 void ALCplaybackOSS_Construct(ALCplaybackOSS *self, ALCdevice *device)
 {
-    new (self) ALCplaybackOSS{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCplaybackOSS{device};
     SET_VTABLE2(ALCplaybackOSS, ALCbackend, self);
 }
 
@@ -280,7 +281,6 @@ void ALCplaybackOSS_Destruct(ALCplaybackOSS *self)
         close(self->fd);
     self->fd = -1;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCplaybackOSS();
 }
 
@@ -498,6 +498,8 @@ struct ALCcaptureOSS final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCcaptureOSS(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCcaptureOSS_recordProc(ALCcaptureOSS *self);
@@ -519,8 +521,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCcaptureOSS);
 
 void ALCcaptureOSS_Construct(ALCcaptureOSS *self, ALCdevice *device)
 {
-    new (self) ALCcaptureOSS{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCcaptureOSS{device};
     SET_VTABLE2(ALCcaptureOSS, ALCbackend, self);
 }
 
@@ -530,7 +531,6 @@ void ALCcaptureOSS_Destruct(ALCcaptureOSS *self)
         close(self->fd);
     self->fd = -1;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCcaptureOSS();
 }
 
diff --git a/Alc/backends/portaudio.cpp b/Alc/backends/portaudio.cpp
index 354389c3..f49c0d2c 100644
--- a/Alc/backends/portaudio.cpp
+++ b/Alc/backends/portaudio.cpp
@@ -134,6 +134,8 @@ struct ALCportPlayback final : public ALCbackend {
     PaStream *Stream{nullptr};
     PaStreamParameters Params;
     ALuint UpdateSize{0u};
+
+    ALCportPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCportPlayback_WriteCallback(const void *inputBuffer, void *outputBuffer,
@@ -158,8 +160,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCportPlayback);
 
 void ALCportPlayback_Construct(ALCportPlayback *self, ALCdevice *device)
 {
-    new (self) ALCportPlayback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCportPlayback{device};
     SET_VTABLE2(ALCportPlayback, ALCbackend, self);
 }
 
@@ -170,7 +171,6 @@ void ALCportPlayback_Destruct(ALCportPlayback *self)
         ERR("Error closing stream: %s\n", Pa_GetErrorText(err));
     self->Stream = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCportPlayback();
 }
 
@@ -320,6 +320,8 @@ struct ALCportCapture final : public ALCbackend {
     PaStreamParameters Params;
 
     RingBufferPtr Ring{nullptr};
+
+    ALCportCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCportCapture_ReadCallback(const void *inputBuffer, void *outputBuffer,
@@ -344,8 +346,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCportCapture);
 
 void ALCportCapture_Construct(ALCportCapture *self, ALCdevice *device)
 {
-    new (self) ALCportCapture{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCportCapture{device};
     SET_VTABLE2(ALCportCapture, ALCbackend, self);
 }
 
@@ -356,7 +357,6 @@ void ALCportCapture_Destruct(ALCportCapture *self)
         ERR("Error closing stream: %s\n", Pa_GetErrorText(err));
     self->Stream = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCportCapture();
 }
 
diff --git a/Alc/backends/pulseaudio.cpp b/Alc/backends/pulseaudio.cpp
index 42fc267f..dc7f97b3 100644
--- a/Alc/backends/pulseaudio.cpp
+++ b/Alc/backends/pulseaudio.cpp
@@ -535,6 +535,8 @@ struct PulsePlayback final : public ALCbackend {
 
     ALuint mBufferSize{0u};
     ALuint mFrameSize{0u};
+
+    PulsePlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 void PulsePlayback_deviceCallback(pa_context *context, const pa_sink_info *info, int eol, void *pdata);
@@ -570,8 +572,7 @@ DEFINE_ALCBACKEND_VTABLE(PulsePlayback);
 
 void PulsePlayback_Construct(PulsePlayback *self, ALCdevice *device)
 {
-    new (self) PulsePlayback();
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) PulsePlayback{device};
     SET_VTABLE2(PulsePlayback, ALCbackend, self);
 }
 
@@ -584,7 +585,6 @@ void PulsePlayback_Destruct(PulsePlayback *self)
         self->context = nullptr;
         self->stream = nullptr;
     }
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~PulsePlayback();
 }
 
@@ -1182,6 +1182,8 @@ struct PulseCapture final : public ALCbackend {
 
     pa_stream *stream{nullptr};
     pa_context *context{nullptr};
+
+    PulseCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 void PulseCapture_deviceCallback(pa_context *context, const pa_source_info *info, int eol, void *pdata);
@@ -1214,8 +1216,7 @@ DEFINE_ALCBACKEND_VTABLE(PulseCapture);
 
 void PulseCapture_Construct(PulseCapture *self, ALCdevice *device)
 {
-    new (self) PulseCapture();
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) PulseCapture{device};
     SET_VTABLE2(PulseCapture, ALCbackend, self);
 }
 
@@ -1228,7 +1229,6 @@ void PulseCapture_Destruct(PulseCapture *self)
         self->context = nullptr;
         self->stream = nullptr;
     }
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~PulseCapture();
 }
 
diff --git a/Alc/backends/qsa.cpp b/Alc/backends/qsa.cpp
index f14718c0..ff74ff21 100644
--- a/Alc/backends/qsa.cpp
+++ b/Alc/backends/qsa.cpp
@@ -172,6 +172,8 @@ void deviceList(int type, al::vector<DevMap> *devmap)
 /* Wrappers to use an old-style backend with the new interface. */
 struct PlaybackWrapper final : public ALCbackend {
     std::unique_ptr<qsa_data> ExtraData;
+
+    PlaybackWrapper(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static void PlaybackWrapper_Construct(PlaybackWrapper *self, ALCdevice *device);
@@ -613,11 +615,8 @@ static void qsa_stop_playback(PlaybackWrapper *self)
 
 static void PlaybackWrapper_Construct(PlaybackWrapper *self, ALCdevice *device)
 {
-    new (self) PlaybackWrapper{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) PlaybackWrapper{device};
     SET_VTABLE2(PlaybackWrapper, ALCbackend, self);
-
-    self->ExtraData = NULL;
 }
 
 static void PlaybackWrapper_Destruct(PlaybackWrapper *self)
@@ -625,7 +624,6 @@ static void PlaybackWrapper_Destruct(PlaybackWrapper *self)
     if(self->ExtraData)
         qsa_close_playback(self);
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~PlaybackWrapper();
 }
 
@@ -657,6 +655,8 @@ static void PlaybackWrapper_stop(PlaybackWrapper *self)
 
 struct CaptureWrapper final : public ALCbackend {
     std::unique_ptr<qsa_data> ExtraData;
+
+    CaptureWrapper(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static void CaptureWrapper_Construct(CaptureWrapper *self, ALCdevice *device);
@@ -916,8 +916,7 @@ static ALCenum qsa_capture_samples(CaptureWrapper *self, ALCvoid *buffer, ALCuin
 
 static void CaptureWrapper_Construct(CaptureWrapper *self, ALCdevice *device)
 {
-    new (self) CaptureWrapper{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) CaptureWrapper{device};
     SET_VTABLE2(CaptureWrapper, ALCbackend, self);
 }
 
@@ -926,7 +925,6 @@ static void CaptureWrapper_Destruct(CaptureWrapper *self)
     if(self->ExtraData)
         qsa_close_capture(self);
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~CaptureWrapper();
 }
 
diff --git a/Alc/backends/sdl2.cpp b/Alc/backends/sdl2.cpp
index d61e0a1b..75052b0f 100644
--- a/Alc/backends/sdl2.cpp
+++ b/Alc/backends/sdl2.cpp
@@ -40,13 +40,15 @@
 #endif
 
 struct ALCsdl2Backend final : public ALCbackend {
-    SDL_AudioDeviceID deviceID;
-    ALsizei frameSize;
+    SDL_AudioDeviceID deviceID{0u};
+    ALsizei frameSize{0};
 
-    ALuint Frequency;
-    DevFmtChannels FmtChans;
-    DevFmtType     FmtType;
-    ALuint UpdateSize;
+    ALuint Frequency{0u};
+    DevFmtChannels FmtChans{};
+    DevFmtType     FmtType{};
+    ALuint UpdateSize{0u};
+
+    ALCsdl2Backend(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static void ALCsdl2Backend_Construct(ALCsdl2Backend *self, ALCdevice *device);
@@ -68,11 +70,9 @@ static const ALCchar defaultDeviceName[] = DEVNAME_PREFIX "Default Device";
 
 static void ALCsdl2Backend_Construct(ALCsdl2Backend *self, ALCdevice *device)
 {
-    new (self) ALCsdl2Backend{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCsdl2Backend{device};
     SET_VTABLE2(ALCsdl2Backend, ALCbackend, self);
 
-    self->deviceID = 0;
     self->frameSize = device->frameSizeFromFmt();
     self->Frequency = device->Frequency;
     self->FmtChans = device->FmtChans;
@@ -86,7 +86,6 @@ static void ALCsdl2Backend_Destruct(ALCsdl2Backend *self)
         SDL_CloseAudioDevice(self->deviceID);
     self->deviceID = 0;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCsdl2Backend();
 }
 
diff --git a/Alc/backends/sndio.cpp b/Alc/backends/sndio.cpp
index 027ff9f2..576e9ba9 100644
--- a/Alc/backends/sndio.cpp
+++ b/Alc/backends/sndio.cpp
@@ -47,6 +47,8 @@ struct SndioPlayback final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    SndioPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static int SndioPlayback_mixerProc(SndioPlayback *self);
@@ -69,8 +71,7 @@ DEFINE_ALCBACKEND_VTABLE(SndioPlayback);
 
 static void SndioPlayback_Construct(SndioPlayback *self, ALCdevice *device)
 {
-    new (self) SndioPlayback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) SndioPlayback{device};
     SET_VTABLE2(SndioPlayback, ALCbackend, self);
 }
 
@@ -83,7 +84,6 @@ static void SndioPlayback_Destruct(SndioPlayback *self)
     al_free(self->mix_data);
     self->mix_data = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~SndioPlayback();
 }
 
@@ -283,6 +283,8 @@ struct SndioCapture final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    SndioCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static int SndioCapture_recordProc(SndioCapture *self);
@@ -305,8 +307,7 @@ DEFINE_ALCBACKEND_VTABLE(SndioCapture);
 
 static void SndioCapture_Construct(SndioCapture *self, ALCdevice *device)
 {
-    new (self) SndioCapture{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) SndioCapture{device};
     SET_VTABLE2(SndioCapture, ALCbackend, self);
 }
 
@@ -316,7 +317,6 @@ static void SndioCapture_Destruct(SndioCapture *self)
         sio_close(self->sndHandle);
     self->sndHandle = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~SndioCapture();
 }
 
diff --git a/Alc/backends/solaris.cpp b/Alc/backends/solaris.cpp
index 41026de8..60db963b 100644
--- a/Alc/backends/solaris.cpp
+++ b/Alc/backends/solaris.cpp
@@ -54,6 +54,8 @@ struct ALCsolarisBackend final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCsolarisBackend(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 static int ALCsolarisBackend_mixerProc(ALCsolarisBackend *self);
@@ -81,8 +83,7 @@ static const char *solaris_driver = "/dev/audio";
 
 static void ALCsolarisBackend_Construct(ALCsolarisBackend *self, ALCdevice *device)
 {
-    new (self) ALCsolarisBackend{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCsolarisBackend{device};
     SET_VTABLE2(ALCsolarisBackend, ALCbackend, self);
 }
 
@@ -96,7 +97,6 @@ static void ALCsolarisBackend_Destruct(ALCsolarisBackend *self)
     self->mix_data = nullptr;
     self->data_size = 0;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCsolarisBackend();
 }
 
diff --git a/Alc/backends/wasapi.cpp b/Alc/backends/wasapi.cpp
index a7524ce1..c7a216eb 100644
--- a/Alc/backends/wasapi.cpp
+++ b/Alc/backends/wasapi.cpp
@@ -491,6 +491,8 @@ DWORD CALLBACK WasapiProxy_messageHandler(void *ptr)
 
 
 struct ALCwasapiPlayback final : public ALCbackend, WasapiProxy {
+    ALCwasapiPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
+
     HRESULT openProxy() override;
     void closeProxy() override;
 
@@ -533,9 +535,8 @@ DEFINE_ALCBACKEND_VTABLE(ALCwasapiPlayback);
 
 void ALCwasapiPlayback_Construct(ALCwasapiPlayback *self, ALCdevice *device)
 {
-    new (self) ALCwasapiPlayback{};
+    new (self) ALCwasapiPlayback{device};
     SET_VTABLE2(ALCwasapiPlayback, ALCbackend, self);
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
 }
 
 void ALCwasapiPlayback_Destruct(ALCwasapiPlayback *self)
@@ -558,7 +559,6 @@ void ALCwasapiPlayback_Destruct(ALCwasapiPlayback *self)
         CloseHandle(self->mMsgEvent);
     self->mMsgEvent = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCwasapiPlayback();
 }
 
@@ -1154,6 +1154,8 @@ ClockLatency ALCwasapiPlayback_getClockLatency(ALCwasapiPlayback *self)
 
 
 struct ALCwasapiCapture final : public ALCbackend, WasapiProxy {
+    ALCwasapiCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
+
     HRESULT openProxy() override;
     void closeProxy() override;
 
@@ -1198,9 +1200,8 @@ DEFINE_ALCBACKEND_VTABLE(ALCwasapiCapture);
 
 void ALCwasapiCapture_Construct(ALCwasapiCapture *self, ALCdevice *device)
 {
-    new (self) ALCwasapiCapture{};
+    new (self) ALCwasapiCapture{device};
     SET_VTABLE2(ALCwasapiCapture, ALCbackend, self);
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
 }
 
 void ALCwasapiCapture_Destruct(ALCwasapiCapture *self)
@@ -1220,7 +1221,6 @@ void ALCwasapiCapture_Destruct(ALCwasapiCapture *self)
         CloseHandle(self->mNotifyEvent);
     self->mNotifyEvent = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCwasapiCapture();
 }
 
diff --git a/Alc/backends/wave.cpp b/Alc/backends/wave.cpp
index d40e93f0..3a65fc64 100644
--- a/Alc/backends/wave.cpp
+++ b/Alc/backends/wave.cpp
@@ -86,6 +86,8 @@ struct ALCwaveBackend final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCwaveBackend(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 int ALCwaveBackend_mixerProc(ALCwaveBackend *self);
@@ -108,8 +110,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCwaveBackend);
 
 void ALCwaveBackend_Construct(ALCwaveBackend *self, ALCdevice *device)
 {
-    new (self) ALCwaveBackend{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCwaveBackend{device};
     SET_VTABLE2(ALCwaveBackend, ALCbackend, self);
 }
 
@@ -119,7 +120,6 @@ void ALCwaveBackend_Destruct(ALCwaveBackend *self)
         fclose(self->mFile);
     self->mFile = nullptr;
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCwaveBackend();
 }
 
diff --git a/Alc/backends/winmm.cpp b/Alc/backends/winmm.cpp
index 485586f6..ab638cd4 100644
--- a/Alc/backends/winmm.cpp
+++ b/Alc/backends/winmm.cpp
@@ -132,6 +132,8 @@ struct ALCwinmmPlayback final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCwinmmPlayback(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 void ALCwinmmPlayback_Construct(ALCwinmmPlayback *self, ALCdevice *device);
@@ -156,8 +158,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCwinmmPlayback);
 
 void ALCwinmmPlayback_Construct(ALCwinmmPlayback *self, ALCdevice *device)
 {
-    new (self) ALCwinmmPlayback{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCwinmmPlayback{device};
     SET_VTABLE2(ALCwinmmPlayback, ALCbackend, self);
 
     std::fill(self->WaveBuffer.begin(), self->WaveBuffer.end(), WAVEHDR{});
@@ -172,7 +173,6 @@ void ALCwinmmPlayback_Destruct(ALCwinmmPlayback *self)
     al_free(self->WaveBuffer[0].lpData);
     std::fill(self->WaveBuffer.begin(), self->WaveBuffer.end(), WAVEHDR{});
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCwinmmPlayback();
 }
 
@@ -407,6 +407,8 @@ struct ALCwinmmCapture final : public ALCbackend {
 
     std::atomic<ALenum> mKillNow{AL_TRUE};
     std::thread mThread;
+
+    ALCwinmmCapture(ALCdevice *device) noexcept : ALCbackend{device} { }
 };
 
 void ALCwinmmCapture_Construct(ALCwinmmCapture *self, ALCdevice *device);
@@ -431,8 +433,7 @@ DEFINE_ALCBACKEND_VTABLE(ALCwinmmCapture);
 
 void ALCwinmmCapture_Construct(ALCwinmmCapture *self, ALCdevice *device)
 {
-    new (self) ALCwinmmCapture{};
-    ALCbackend_Construct(STATIC_CAST(ALCbackend, self), device);
+    new (self) ALCwinmmCapture{device};
     SET_VTABLE2(ALCwinmmCapture, ALCbackend, self);
 
     std::fill(self->WaveBuffer.begin(), self->WaveBuffer.end(), WAVEHDR{});
@@ -448,7 +449,6 @@ void ALCwinmmCapture_Destruct(ALCwinmmCapture *self)
     al_free(self->WaveBuffer[0].lpData);
     std::fill(self->WaveBuffer.begin(), self->WaveBuffer.end(), WAVEHDR{});
 
-    ALCbackend_Destruct(STATIC_CAST(ALCbackend, self));
     self->~ALCwinmmCapture();
 }