mmdevapi: Implement SpatialAudio features.

dlls/mmdevapi/Makefile.in

@@ -6,6 +6,7 @@ EXTRADLLFLAGS = -mno-cygwin
 C_SRCS = \
 	audiovolume.c \
 	devenum.c \
-	main.c
+	main.c \
+	spatialaudio.c
 
 IDL_SRCS = mmdevapi_classes.idl

dlls/mmdevapi/audiovolume.c

@@ -33,6 +33,7 @@
 #include "audioclient.h"
 #include "endpointvolume.h"
 #include "audiopolicy.h"
+#include "spatialaudioclient.h"
 
 #include "mmdevapi.h"
 

dlls/mmdevapi/devenum.c

@@ -35,6 +35,7 @@
 #include "audioclient.h"
 #include "endpointvolume.h"
 #include "audiopolicy.h"
+#include "spatialaudioclient.h"
 
 #include "mmdevapi.h"
 #include "devpkey.h"
@@ -635,6 +636,10 @@ static HRESULT WINAPI MMDevice_Activate(IMMDevice *iface, REFIID riid, DWORD cls
                 IDirectSoundCapture_Release((IDirectSoundCapture*)*ppv);
         }
     }
+    else if (IsEqualIID(riid, &IID_ISpatialAudioClient))
+    {
+        hr = SpatialAudioClient_Create(iface, (ISpatialAudioClient**)ppv);
+    }
     else
         ERR("Invalid/unknown iid %s\n", debugstr_guid(riid));
 

dlls/mmdevapi/main.c

@@ -37,6 +37,7 @@
 #include "audiopolicy.h"
 #include "devpkey.h"
 #include "winreg.h"
+#include "spatialaudioclient.h"
 
 #include "mmdevapi.h"
 #include "wine/debug.h"

dlls/mmdevapi/mmdevapi.h

@@ -71,5 +71,6 @@ typedef struct MMDevice {
 
 extern HRESULT AudioClient_Create(MMDevice *parent, IAudioClient **ppv) DECLSPEC_HIDDEN;
 extern HRESULT AudioEndpointVolume_Create(MMDevice *parent, IAudioEndpointVolumeEx **ppv) DECLSPEC_HIDDEN;
+extern HRESULT SpatialAudioClient_Create(IMMDevice *device, ISpatialAudioClient **out) DECLSPEC_HIDDEN;
 
 extern const WCHAR drv_keyW[] DECLSPEC_HIDDEN;

dlls/mmdevapi/spatialaudio.c

+/*
+ * Copyright 2020 Andrew Eikum for CodeWeavers
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#define COBJMACROS
+#define NONAMELESSUNION
+
+#include <stdarg.h>
+
+#include "windef.h"
+#include "winbase.h"
+#include "winnls.h"
+#include "winreg.h"
+#include "wine/heap.h"
+#include "wine/debug.h"
+#include "wine/list.h"
+
+#include "ole2.h"
+#include "mmdeviceapi.h"
+#include "mmsystem.h"
+#include "audioclient.h"
+#include "endpointvolume.h"
+#include "audiopolicy.h"
+#include "spatialaudioclient.h"
+
+#include "mmdevapi.h"
+
+WINE_DEFAULT_DEBUG_CHANNEL(mmdevapi);
+
+#define MAX_PERIODS 3
+
+static UINT32 AudioObjectType_to_index(AudioObjectType type)
+{
+    UINT32 o = 0;
+    while(type){
+        type >>= 1;
+        ++o;
+    }
+    return o - 2;
+}
+
+typedef struct SpatialAudioImpl SpatialAudioImpl;
+typedef struct SpatialAudioStreamImpl SpatialAudioStreamImpl;
+typedef struct SpatialAudioObjectImpl SpatialAudioObjectImpl;
+
+struct SpatialAudioObjectImpl {
+    ISpatialAudioObject ISpatialAudioObject_iface;
+    LONG ref;
+
+    SpatialAudioStreamImpl *sa_stream;
+    AudioObjectType type;
+    UINT32 static_idx;
+
+    float *buf;
+
+    struct list entry;
+};
+
+struct SpatialAudioStreamImpl {
+    ISpatialAudioObjectRenderStream ISpatialAudioObjectRenderStream_iface;
+    LONG ref;
+    CRITICAL_SECTION lock;
+
+    SpatialAudioImpl *sa_client;
+    SpatialAudioObjectRenderStreamActivationParams params;
+
+    IAudioClient *client;
+    IAudioRenderClient *render;
+
+    UINT32 period_frames, update_frames;
+    WAVEFORMATEXTENSIBLE stream_fmtex;
+
+    float *buf;
+
+    UINT32 static_object_map[17];
+
+    struct list objects;
+};
+
+struct SpatialAudioImpl {
+    ISpatialAudioClient ISpatialAudioClient_iface;
+    IAudioFormatEnumerator IAudioFormatEnumerator_iface;
+    IMMDevice *mmdev;
+    LONG ref;
+    WAVEFORMATEXTENSIBLE object_fmtex;
+};
+
+static inline SpatialAudioObjectImpl *impl_from_ISpatialAudioObject(ISpatialAudioObject *iface)
+{
+    return CONTAINING_RECORD(iface, SpatialAudioObjectImpl, ISpatialAudioObject_iface);
+}
+
+static inline SpatialAudioStreamImpl *impl_from_ISpatialAudioObjectRenderStream(ISpatialAudioObjectRenderStream *iface)
+{
+    return CONTAINING_RECORD(iface, SpatialAudioStreamImpl, ISpatialAudioObjectRenderStream_iface);
+}
+
+static inline SpatialAudioImpl *impl_from_ISpatialAudioClient(ISpatialAudioClient *iface)
+{
+    return CONTAINING_RECORD(iface, SpatialAudioImpl, ISpatialAudioClient_iface);
+}
+
+static inline SpatialAudioImpl *impl_from_IAudioFormatEnumerator(IAudioFormatEnumerator *iface)
+{
+    return CONTAINING_RECORD(iface, SpatialAudioImpl, IAudioFormatEnumerator_iface);
+}
+
+static HRESULT WINAPI SAO_QueryInterface(ISpatialAudioObject *iface,
+        REFIID riid, void **ppv)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+
+    TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), ppv);
+
+    if (!ppv)
+        return E_POINTER;
+
+    *ppv = NULL;
+
+    if (IsEqualIID(riid, &IID_IUnknown) ||
+            IsEqualIID(riid, &IID_ISpatialAudioObjectBase) ||
+            IsEqualIID(riid, &IID_ISpatialAudioObject)) {
+        *ppv = &This->ISpatialAudioObject_iface;
+    }
+    else
+        return E_NOINTERFACE;
+
+    IUnknown_AddRef((IUnknown *)*ppv);
+
+    return S_OK;
+}
+
+static ULONG WINAPI SAO_AddRef(ISpatialAudioObject *iface)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+    TRACE("(%p) new ref %u\n", This, ref);
+    return ref;
+}
+
+static ULONG WINAPI SAO_Release(ISpatialAudioObject *iface)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+    ULONG ref = InterlockedDecrement(&This->ref);
+    TRACE("(%p) new ref %u\n", This, ref);
+    if(!ref){
+        EnterCriticalSection(&This->sa_stream->lock);
+        list_remove(&This->entry);
+        LeaveCriticalSection(&This->sa_stream->lock);
+
+        ISpatialAudioObjectRenderStream_Release(&This->sa_stream->ISpatialAudioObjectRenderStream_iface);
+        heap_free(This->buf);
+        heap_free(This);
+    }
+    return ref;
+}
+
+static HRESULT WINAPI SAO_GetBuffer(ISpatialAudioObject *iface,
+        BYTE **buffer, UINT32 *bytes)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+
+    TRACE("(%p)->(%p, %p)\n", This, buffer, bytes);
+
+    EnterCriticalSection(&This->sa_stream->lock);
+
+    if(This->sa_stream->update_frames == ~0){
+        LeaveCriticalSection(&This->sa_stream->lock);
+        return SPTLAUDCLNT_E_OUT_OF_ORDER;
+    }
+
+    *buffer = (BYTE *)This->buf;
+    *bytes = This->sa_stream->update_frames *
+        This->sa_stream->sa_client->object_fmtex.Format.nBlockAlign;
+
+    LeaveCriticalSection(&This->sa_stream->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAO_SetEndOfStream(ISpatialAudioObject *iface, UINT32 frames)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+    FIXME("(%p)->(%u)\n", This, frames);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAO_IsActive(ISpatialAudioObject *iface, BOOL *active)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+    FIXME("(%p)->(%p)\n", This, active);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAO_GetAudioObjectType(ISpatialAudioObject *iface,
+        AudioObjectType *type)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+
+    TRACE("(%p)->(%p)\n", This, type);
+
+    *type = This->type;
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAO_SetPosition(ISpatialAudioObject *iface, float x,
+        float y, float z)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+    FIXME("(%p)->(%f, %f, %f)\n", This, x, y, z);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAO_SetVolume(ISpatialAudioObject *iface, float vol)
+{
+    SpatialAudioObjectImpl *This = impl_from_ISpatialAudioObject(iface);
+    FIXME("(%p)->(%f)\n", This, vol);
+    return E_NOTIMPL;
+}
+
+static ISpatialAudioObjectVtbl ISpatialAudioObject_vtbl = {
+    SAO_QueryInterface,
+    SAO_AddRef,
+    SAO_Release,
+    SAO_GetBuffer,
+    SAO_SetEndOfStream,
+    SAO_IsActive,
+    SAO_GetAudioObjectType,
+    SAO_SetPosition,
+    SAO_SetVolume,
+};
+
+static HRESULT WINAPI SAORS_QueryInterface(ISpatialAudioObjectRenderStream *iface,
+        REFIID riid, void **ppv)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+
+    TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), ppv);
+
+    if (!ppv)
+        return E_POINTER;
+
+    *ppv = NULL;
+
+    if (IsEqualIID(riid, &IID_IUnknown) ||
+            IsEqualIID(riid, &IID_ISpatialAudioObjectRenderStreamBase) ||
+            IsEqualIID(riid, &IID_ISpatialAudioObjectRenderStream)) {
+        *ppv = &This->ISpatialAudioObjectRenderStream_iface;
+    }
+    else
+        return E_NOINTERFACE;
+
+    IUnknown_AddRef((IUnknown *)*ppv);
+
+    return S_OK;
+}
+
+static ULONG WINAPI SAORS_AddRef(ISpatialAudioObjectRenderStream *iface)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+    TRACE("(%p) new ref %u\n", This, ref);
+    return ref;
+}
+
+static ULONG WINAPI SAORS_Release(ISpatialAudioObjectRenderStream *iface)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    ULONG ref = InterlockedDecrement(&This->ref);
+    TRACE("(%p) new ref %u\n", This, ref);
+    if(!ref){
+        IAudioClient_Stop(This->client);
+        if(This->update_frames != ~0 && This->update_frames > 0)
+            IAudioRenderClient_ReleaseBuffer(This->render, This->update_frames, 0);
+        IAudioRenderClient_Release(This->render);
+        IAudioClient_Release(This->client);
+        if(This->params.NotifyObject)
+            ISpatialAudioObjectRenderStreamNotify_Release(This->params.NotifyObject);
+        heap_free((void*)This->params.ObjectFormat);
+        CloseHandle(This->params.EventHandle);
+        DeleteCriticalSection(&This->lock);
+        ISpatialAudioClient_Release(&This->sa_client->ISpatialAudioClient_iface);
+        heap_free(This);
+    }
+    return ref;
+}
+
+static HRESULT WINAPI SAORS_GetAvailableDynamicObjectCount(
+        ISpatialAudioObjectRenderStream *iface, UINT32 *count)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    FIXME("(%p)->(%p)\n", This, count);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAORS_GetService(ISpatialAudioObjectRenderStream *iface,
+        REFIID riid, void **service)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    FIXME("(%p)->(%s, %p)\n", This, debugstr_guid(riid), service);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAORS_Start(ISpatialAudioObjectRenderStream *iface)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    HRESULT hr;
+
+    TRACE("(%p)->()\n", This);
+
+    hr = IAudioClient_Start(This->client);
+    if(FAILED(hr)){
+        WARN("IAudioClient::Start failed: %08x\n", hr);
+        return hr;
+    }
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAORS_Stop(ISpatialAudioObjectRenderStream *iface)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    HRESULT hr;
+
+    TRACE("(%p)->()\n", This);
+
+    hr = IAudioClient_Stop(This->client);
+    if(FAILED(hr)){
+        WARN("IAudioClient::Stop failed: %08x\n", hr);
+        return hr;
+    }
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAORS_Reset(ISpatialAudioObjectRenderStream *iface)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    FIXME("(%p)->()\n", This);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAORS_BeginUpdatingAudioObjects(ISpatialAudioObjectRenderStream *iface,
+        UINT32 *dyn_count, UINT32 *frames)
+{
+    static BOOL fixme_once = FALSE;
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    SpatialAudioObjectImpl *object;
+    UINT32 pad;
+    HRESULT hr;
+
+    TRACE("(%p)->(%p, %p)\n", This, dyn_count, frames);
+
+    EnterCriticalSection(&This->lock);
+
+    if(This->update_frames != ~0){
+        LeaveCriticalSection(&This->lock);
+        return SPTLAUDCLNT_E_OUT_OF_ORDER;
+    }
+
+    hr = IAudioClient_GetCurrentPadding(This->client, &pad);
+    if(FAILED(hr)){
+        WARN("GetCurrentPadding failed: %08x\n", hr);
+        LeaveCriticalSection(&This->lock);
+        return hr;
+    }
+
+    if(pad < This->period_frames * MAX_PERIODS){
+        This->update_frames = This->period_frames * MAX_PERIODS - pad;
+    }else{
+        This->update_frames = 0;
+    }
+
+    if(This->update_frames > 0){
+        hr = IAudioRenderClient_GetBuffer(This->render, This->update_frames, (BYTE **)&This->buf);
+        if(FAILED(hr)){
+            WARN("GetBuffer failed: %08x\n", hr);
+            This->update_frames = ~0;
+            LeaveCriticalSection(&This->lock);
+            return hr;
+        }
+
+        LIST_FOR_EACH_ENTRY(object, &This->objects, SpatialAudioObjectImpl, entry){
+            memset(object->buf, 0, This->update_frames * This->sa_client->object_fmtex.Format.nBlockAlign);
+        }
+    }else if (!fixme_once){
+        fixme_once = TRUE;
+        FIXME("Zero frame update.\n");
+    }
+
+    *dyn_count = 0;
+    *frames = This->update_frames;
+
+    LeaveCriticalSection(&This->lock);
+
+    return S_OK;
+}
+
+static void mix_static_object(SpatialAudioStreamImpl *stream, SpatialAudioObjectImpl *object)
+{
+    float *in = object->buf, *out;
+    UINT32 i;
+    if(object->static_idx == ~0 ||
+            stream->static_object_map[object->static_idx] == ~0){
+        WARN("Got unmapped static object?! Not mixing. Type: 0x%x\n", object->type);
+        return;
+    }
+    out = stream->buf + stream->static_object_map[object->static_idx];
+    for(i = 0; i < stream->update_frames; ++i){
+        *out += *in;
+        ++in;
+        out += stream->stream_fmtex.Format.nChannels;
+    }
+}
+
+static HRESULT WINAPI SAORS_EndUpdatingAudioObjects(ISpatialAudioObjectRenderStream *iface)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    SpatialAudioObjectImpl *object;
+    HRESULT hr;
+
+    TRACE("(%p)->()\n", This);
+
+    EnterCriticalSection(&This->lock);
+
+    if(This->update_frames == ~0){
+        LeaveCriticalSection(&This->lock);
+        return SPTLAUDCLNT_E_OUT_OF_ORDER;
+    }
+
+    if(This->update_frames > 0){
+        LIST_FOR_EACH_ENTRY(object, &This->objects, SpatialAudioObjectImpl, entry){
+            if(object->type != AudioObjectType_Dynamic)
+                mix_static_object(This, object);
+            else
+                WARN("Don't know how to mix dynamic object yet. %p\n", object);
+        }
+
+        hr = IAudioRenderClient_ReleaseBuffer(This->render, This->update_frames, 0);
+        if(FAILED(hr))
+            WARN("ReleaseBuffer failed: %08x\n", hr);
+    }
+
+    This->update_frames = ~0;
+
+    LeaveCriticalSection(&This->lock);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAORS_ActivateSpatialAudioObject(ISpatialAudioObjectRenderStream *iface,
+        AudioObjectType type, ISpatialAudioObject **object)
+{
+    SpatialAudioStreamImpl *This = impl_from_ISpatialAudioObjectRenderStream(iface);
+    SpatialAudioObjectImpl *obj;
+
+    TRACE("(%p)->(0x%x, %p)\n", This, type, object);
+
+    if(type == AudioObjectType_Dynamic)
+        return SPTLAUDCLNT_E_NO_MORE_OBJECTS;
+
+    if(type & ~This->params.StaticObjectTypeMask)
+        return SPTLAUDCLNT_E_STATIC_OBJECT_NOT_AVAILABLE;
+
+    LIST_FOR_EACH_ENTRY(obj, &This->objects, SpatialAudioObjectImpl, entry){
+        if(obj->static_idx == AudioObjectType_to_index(type))
+            return SPTLAUDCLNT_E_OBJECT_ALREADY_ACTIVE;
+    }
+
+    obj = heap_alloc_zero(sizeof(*obj));
+    obj->ISpatialAudioObject_iface.lpVtbl = &ISpatialAudioObject_vtbl;
+    obj->ref = 1;
+    obj->type = type;
+    if(type == AudioObjectType_None){
+        FIXME("AudioObjectType_None not implemented yet!\n");
+        obj->static_idx = ~0;
+    }else{
+        obj->static_idx = AudioObjectType_to_index(type);
+    }
+
+    obj->sa_stream = This;
+    SAORS_AddRef(&This->ISpatialAudioObjectRenderStream_iface);
+
+    obj->buf = heap_alloc_zero(This->period_frames * MAX_PERIODS * This->sa_client->object_fmtex.Format.nBlockAlign);
+
+    EnterCriticalSection(&This->lock);
+
+    list_add_tail(&This->objects, &obj->entry);
+
+    LeaveCriticalSection(&This->lock);
+
+    *object = &obj->ISpatialAudioObject_iface;
+
+    return S_OK;
+}
+
+static ISpatialAudioObjectRenderStreamVtbl ISpatialAudioObjectRenderStream_vtbl = {
+    SAORS_QueryInterface,
+    SAORS_AddRef,
+    SAORS_Release,
+    SAORS_GetAvailableDynamicObjectCount,
+    SAORS_GetService,
+    SAORS_Start,
+    SAORS_Stop,
+    SAORS_Reset,
+    SAORS_BeginUpdatingAudioObjects,
+    SAORS_EndUpdatingAudioObjects,
+    SAORS_ActivateSpatialAudioObject,
+};
+
+static HRESULT WINAPI SAC_QueryInterface(ISpatialAudioClient *iface, REFIID riid, void **ppv)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+
+    TRACE("(%p)->(%s,%p)\n", This, debugstr_guid(riid), ppv);
+
+    if (!ppv)
+        return E_POINTER;
+
+    *ppv = NULL;
+
+    if (IsEqualIID(riid, &IID_IUnknown) ||
+            IsEqualIID(riid, &IID_ISpatialAudioClient)) {
+        *ppv = &This->ISpatialAudioClient_iface;
+    }
+    else
+        return E_NOINTERFACE;
+
+    IUnknown_AddRef((IUnknown *)*ppv);
+
+    return S_OK;
+}
+
+static ULONG WINAPI SAC_AddRef(ISpatialAudioClient *iface)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    ULONG ref = InterlockedIncrement(&This->ref);
+    TRACE("(%p) new ref %u\n", This, ref);
+    return ref;
+}
+
+static ULONG WINAPI SAC_Release(ISpatialAudioClient *iface)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    ULONG ref = InterlockedDecrement(&This->ref);
+    TRACE("(%p) new ref %u\n", This, ref);
+    if (!ref) {
+        IMMDevice_Release(This->mmdev);
+        heap_free(This);
+    }
+    return ref;
+}
+
+static HRESULT WINAPI SAC_GetStaticObjectPosition(ISpatialAudioClient *iface,
+        AudioObjectType type, float *x, float *y, float *z)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    FIXME("(%p)->(0x%x, %p, %p, %p)\n", This, type, x, y, z);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAC_GetNativeStaticObjectTypeMask(ISpatialAudioClient *iface,
+        AudioObjectType *mask)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    FIXME("(%p)->(%p)\n", This, mask);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAC_GetMaxDynamicObjectCount(ISpatialAudioClient *iface,
+        UINT32 *value)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    FIXME("(%p)->(%p)\n", This, value);
+
+    *value = 0;
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAC_GetSupportedAudioObjectFormatEnumerator(
+        ISpatialAudioClient *iface, IAudioFormatEnumerator **enumerator)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+
+    TRACE("(%p)->(%p)\n", This, enumerator);
+
+    *enumerator = &This->IAudioFormatEnumerator_iface;
+    SAC_AddRef(iface);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAC_GetMaxFrameCount(ISpatialAudioClient *iface,
+        const WAVEFORMATEX *format, UINT32 *count)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+
+    /* FIXME: should get device period from the device */
+    static const REFERENCE_TIME period = 100000;
+
+    TRACE("(%p)->(%p, %p)\n", This, format, count);
+
+    *count = MulDiv(period, format->nSamplesPerSec, 10000000) * MAX_PERIODS;
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAC_IsAudioObjectFormatSupported(ISpatialAudioClient *iface,
+        const WAVEFORMATEX *format)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    FIXME("(%p)->(%p)\n", This, format);
+    return E_NOTIMPL;
+}
+
+static HRESULT WINAPI SAC_IsSpatialAudioStreamAvailable(ISpatialAudioClient *iface,
+        REFIID stream_uuid, const PROPVARIANT *info)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    FIXME("(%p)->(%s, %p)\n", This, debugstr_guid(stream_uuid), info);
+    return E_NOTIMPL;
+}
+
+static WAVEFORMATEX *clone_fmtex(const WAVEFORMATEX *src)
+{
+    WAVEFORMATEX *r = heap_alloc(sizeof(WAVEFORMATEX) + src->cbSize);
+    memcpy(r, src, sizeof(WAVEFORMATEX) + src->cbSize);
+    return r;
+}
+
+static const char *debugstr_fmtex(const WAVEFORMATEX *fmt)
+{
+    static char buf[2048];
+    if(fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE){
+        const WAVEFORMATEXTENSIBLE *fmtex = (const WAVEFORMATEXTENSIBLE *)fmt;
+        snprintf(buf, sizeof(buf), "tag: 0x%x (%s), ch: %u (mask: 0x%x), rate: %u, depth: %u",
+                fmt->wFormatTag, debugstr_guid(&fmtex->SubFormat),
+                fmt->nChannels, fmtex->dwChannelMask, fmt->nSamplesPerSec,
+                fmt->wBitsPerSample);
+    }else{
+        snprintf(buf, sizeof(buf), "tag: 0x%x, ch: %u, rate: %u, depth: %u",
+                fmt->wFormatTag, fmt->nChannels, fmt->nSamplesPerSec,
+                fmt->wBitsPerSample);
+    }
+    return buf;
+}
+
+static void static_mask_to_channels(AudioObjectType static_mask, WORD *count, DWORD *mask, UINT32 *map)
+{
+    UINT32 out_chan = 0, map_idx = 0;
+    *count = 0;
+    *mask = 0;
+#define CONVERT_MASK(f, t) \
+    if(static_mask & f){ \
+        *count += 1; \
+        *mask |= t; \
+        map[map_idx++] = out_chan++; \
+        TRACE("mapping 0x%x to %u\n", f, out_chan - 1); \
+    }else{ \
+        map[map_idx++] = ~0; \
+    }
+    CONVERT_MASK(AudioObjectType_FrontLeft, SPEAKER_FRONT_LEFT);
+    CONVERT_MASK(AudioObjectType_FrontRight, SPEAKER_FRONT_RIGHT);
+    CONVERT_MASK(AudioObjectType_FrontCenter, SPEAKER_FRONT_CENTER);
+    CONVERT_MASK(AudioObjectType_LowFrequency, SPEAKER_LOW_FREQUENCY);
+    CONVERT_MASK(AudioObjectType_SideLeft, SPEAKER_SIDE_LEFT);
+    CONVERT_MASK(AudioObjectType_SideRight, SPEAKER_SIDE_RIGHT);
+    CONVERT_MASK(AudioObjectType_BackLeft, SPEAKER_BACK_LEFT);
+    CONVERT_MASK(AudioObjectType_BackRight, SPEAKER_BACK_RIGHT);
+    CONVERT_MASK(AudioObjectType_TopFrontLeft, SPEAKER_TOP_FRONT_LEFT);
+    CONVERT_MASK(AudioObjectType_TopFrontRight, SPEAKER_TOP_FRONT_RIGHT);
+    CONVERT_MASK(AudioObjectType_TopBackLeft, SPEAKER_TOP_BACK_LEFT);
+    CONVERT_MASK(AudioObjectType_TopBackRight, SPEAKER_TOP_BACK_RIGHT);
+    CONVERT_MASK(AudioObjectType_BackCenter, SPEAKER_BACK_CENTER);
+}
+
+static HRESULT activate_stream(SpatialAudioStreamImpl *stream)
+{
+    WAVEFORMATEXTENSIBLE *object_fmtex = (WAVEFORMATEXTENSIBLE *)stream->params.ObjectFormat;
+    HRESULT hr;
+    REFERENCE_TIME period;
+
+    if(!(object_fmtex->Format.wFormatTag == WAVE_FORMAT_IEEE_FLOAT ||
+                (object_fmtex->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
+                 IsEqualGUID(&object_fmtex->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT)))){
+        FIXME("Only float formats are supported for now\n");
+        return E_INVALIDARG;
+    }
+
+    hr = IMMDevice_Activate(stream->sa_client->mmdev, &IID_IAudioClient,
+            CLSCTX_INPROC_SERVER, NULL, (void**)&stream->client);
+    if(FAILED(hr)){
+        WARN("Activate failed: %08x\n", hr);
+        return hr;
+    }
+
+    hr = IAudioClient_GetDevicePeriod(stream->client, &period, NULL);
+    if(FAILED(hr)){
+        WARN("GetDevicePeriod failed: %08x\n", hr);
+        IAudioClient_Release(stream->client);
+        return hr;
+    }
+
+    stream->stream_fmtex.Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
+    static_mask_to_channels(stream->params.StaticObjectTypeMask,
+            &stream->stream_fmtex.Format.nChannels, &stream->stream_fmtex.dwChannelMask,
+            stream->static_object_map);
+    stream->stream_fmtex.Format.nSamplesPerSec = stream->params.ObjectFormat->nSamplesPerSec;
+    stream->stream_fmtex.Format.wBitsPerSample = stream->params.ObjectFormat->wBitsPerSample;
+    stream->stream_fmtex.Format.nBlockAlign = (stream->stream_fmtex.Format.nChannels * stream->stream_fmtex.Format.wBitsPerSample) / 8;
+    stream->stream_fmtex.Format.nAvgBytesPerSec = stream->stream_fmtex.Format.nSamplesPerSec * stream->stream_fmtex.Format.nBlockAlign;
+    stream->stream_fmtex.Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
+    stream->stream_fmtex.Samples.wValidBitsPerSample = stream->stream_fmtex.Format.wBitsPerSample;
+    stream->stream_fmtex.SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
+
+    hr = IAudioClient_Initialize(stream->client, AUDCLNT_SHAREMODE_SHARED,
+            AUDCLNT_STREAMFLAGS_EVENTCALLBACK | AUDCLNT_STREAMFLAGS_NOPERSIST,
+            period * MAX_PERIODS, 0, &stream->stream_fmtex.Format, NULL);
+    if(FAILED(hr)){
+        WARN("Initialize failed: %08x\n", hr);
+        IAudioClient_Release(stream->client);
+        return hr;
+    }
+
+    hr = IAudioClient_SetEventHandle(stream->client, stream->params.EventHandle);
+    if(FAILED(hr)){
+        WARN("SetEventHandle failed: %08x\n", hr);
+        IAudioClient_Release(stream->client);
+        return hr;
+    }
+
+    hr = IAudioClient_GetService(stream->client, &IID_IAudioRenderClient, (void**)&stream->render);
+    if(FAILED(hr)){
+        WARN("GetService(AudioRenderClient) failed: %08x\n", hr);
+        IAudioClient_Release(stream->client);
+        return hr;
+    }
+
+    stream->period_frames = MulDiv(period, stream->stream_fmtex.Format.nSamplesPerSec, 10000000);
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAC_ActivateSpatialAudioStream(ISpatialAudioClient *iface,
+        const PROPVARIANT *prop, REFIID riid, void **stream)
+{
+    SpatialAudioImpl *This = impl_from_ISpatialAudioClient(iface);
+    SpatialAudioObjectRenderStreamActivationParams *params;
+    HRESULT hr;
+
+    TRACE("(%p)->(%s, %p)\n", This, debugstr_guid(riid), stream);
+
+    if(IsEqualIID(riid, &IID_ISpatialAudioObjectRenderStream)){
+        SpatialAudioStreamImpl *obj;
+
+        if(prop &&
+                (prop->vt != VT_BLOB ||
+                 prop->u.blob.cbSize != sizeof(SpatialAudioObjectRenderStreamActivationParams))){
+            WARN("Got invalid params\n");
+            *stream = NULL;
+            return E_INVALIDARG;
+        }
+
+        params = (SpatialAudioObjectRenderStreamActivationParams*) prop->u.blob.pBlobData;
+
+        if(params->StaticObjectTypeMask & AudioObjectType_Dynamic){
+            *stream = NULL;
+            return E_INVALIDARG;
+        }
+
+        if(params->EventHandle == INVALID_HANDLE_VALUE ||
+                params->EventHandle == 0){
+            *stream = NULL;
+            return E_INVALIDARG;
+        }
+
+        if(!params->ObjectFormat ||
+                memcmp(params->ObjectFormat, &This->object_fmtex.Format, sizeof(*params->ObjectFormat) + params->ObjectFormat->cbSize)){
+            *stream = NULL;
+            return AUDCLNT_E_UNSUPPORTED_FORMAT;
+        }
+
+        obj = heap_alloc_zero(sizeof(SpatialAudioStreamImpl));
+
+        obj->ISpatialAudioObjectRenderStream_iface.lpVtbl = &ISpatialAudioObjectRenderStream_vtbl;
+        obj->ref = 1;
+        memcpy(&obj->params, params, sizeof(obj->params));
+
+        obj->update_frames = ~0;
+
+        InitializeCriticalSection(&obj->lock);
+        list_init(&obj->objects);
+
+        obj->sa_client = This;
+        SAC_AddRef(&This->ISpatialAudioClient_iface);
+
+        obj->params.ObjectFormat = clone_fmtex(obj->params.ObjectFormat);
+
+        DuplicateHandle(GetCurrentProcess(), obj->params.EventHandle,
+                GetCurrentProcess(), &obj->params.EventHandle, 0, FALSE,
+                DUPLICATE_SAME_ACCESS);
+
+        if(obj->params.NotifyObject)
+            ISpatialAudioObjectRenderStreamNotify_AddRef(obj->params.NotifyObject);
+
+        if(TRACE_ON(mmdevapi)){
+            TRACE("ObjectFormat: {%s}\n", debugstr_fmtex(obj->params.ObjectFormat));
+            TRACE("StaticObjectTypeMask: 0x%x\n", obj->params.StaticObjectTypeMask);
+            TRACE("MinDynamicObjectCount: 0x%x\n", obj->params.MinDynamicObjectCount);
+            TRACE("MaxDynamicObjectCount: 0x%x\n", obj->params.MaxDynamicObjectCount);
+            TRACE("Category: 0x%x\n", obj->params.Category);
+            TRACE("EventHandle: %p\n", obj->params.EventHandle);
+            TRACE("NotifyObject: %p\n", obj->params.NotifyObject);
+        }
+
+        hr = activate_stream(obj);
+        if(FAILED(hr)){
+            if(obj->params.NotifyObject)
+                ISpatialAudioObjectRenderStreamNotify_Release(obj->params.NotifyObject);
+            DeleteCriticalSection(&obj->lock);
+            heap_free((void*)obj->params.ObjectFormat);
+            CloseHandle(obj->params.EventHandle);
+            ISpatialAudioClient_Release(&obj->sa_client->ISpatialAudioClient_iface);
+            heap_free(obj);
+            *stream = NULL;
+            return hr;
+        }
+
+        *stream = &obj->ISpatialAudioObjectRenderStream_iface;
+    }else{
+        FIXME("Unsupported audio stream IID: %s\n", debugstr_guid(riid));
+        *stream = NULL;
+        return E_NOTIMPL;
+    }
+
+    return S_OK;
+}
+
+static ISpatialAudioClientVtbl ISpatialAudioClient_vtbl = {
+    SAC_QueryInterface,
+    SAC_AddRef,
+    SAC_Release,
+    SAC_GetStaticObjectPosition,
+    SAC_GetNativeStaticObjectTypeMask,
+    SAC_GetMaxDynamicObjectCount,
+    SAC_GetSupportedAudioObjectFormatEnumerator,
+    SAC_GetMaxFrameCount,
+    SAC_IsAudioObjectFormatSupported,
+    SAC_IsSpatialAudioStreamAvailable,
+    SAC_ActivateSpatialAudioStream,
+};
+
+static HRESULT WINAPI SAOFE_QueryInterface(IAudioFormatEnumerator *iface,
+        REFIID riid, void **ppvObject)
+{
+    SpatialAudioImpl *This = impl_from_IAudioFormatEnumerator(iface);
+    return SAC_QueryInterface(&This->ISpatialAudioClient_iface, riid, ppvObject);
+}
+
+static ULONG WINAPI SAOFE_AddRef(IAudioFormatEnumerator *iface)
+{
+    SpatialAudioImpl *This = impl_from_IAudioFormatEnumerator(iface);
+    return SAC_AddRef(&This->ISpatialAudioClient_iface);
+}
+
+static ULONG WINAPI SAOFE_Release(IAudioFormatEnumerator *iface)
+{
+    SpatialAudioImpl *This = impl_from_IAudioFormatEnumerator(iface);
+    return SAC_Release(&This->ISpatialAudioClient_iface);
+}
+
+static HRESULT WINAPI SAOFE_GetCount(IAudioFormatEnumerator *iface, UINT32 *count)
+{
+    SpatialAudioImpl *This = impl_from_IAudioFormatEnumerator(iface);
+
+    TRACE("(%p)->(%p)\n", This, count);
+
+    *count = 1;
+
+    return S_OK;
+}
+
+static HRESULT WINAPI SAOFE_GetFormat(IAudioFormatEnumerator *iface,
+        UINT32 index, WAVEFORMATEX **format)
+{
+    SpatialAudioImpl *This = impl_from_IAudioFormatEnumerator(iface);
+
+    TRACE("(%p)->(%u, %p)\n", This, index, format);
+
+    if(index > 0)
+        return E_INVALIDARG;
+
+    *format = &This->object_fmtex.Format;
+
+    return S_OK;
+}
+
+static IAudioFormatEnumeratorVtbl IAudioFormatEnumerator_vtbl = {
+    SAOFE_QueryInterface,
+    SAOFE_AddRef,
+    SAOFE_Release,
+    SAOFE_GetCount,
+    SAOFE_GetFormat,
+};
+
+HRESULT SpatialAudioClient_Create(IMMDevice *mmdev, ISpatialAudioClient **out)
+{
+    SpatialAudioImpl *obj;
+    IAudioClient *aclient;
+    WAVEFORMATEX *closest;
+    HRESULT hr;
+
+    obj = heap_alloc_zero(sizeof(*obj));
+
+    obj->ref = 1;
+    obj->ISpatialAudioClient_iface.lpVtbl = &ISpatialAudioClient_vtbl;
+    obj->IAudioFormatEnumerator_iface.lpVtbl = &IAudioFormatEnumerator_vtbl;
+
+    obj->object_fmtex.Format.wFormatTag = WAVE_FORMAT_IEEE_FLOAT;
+    obj->object_fmtex.Format.nChannels = 1;
+    obj->object_fmtex.Format.nSamplesPerSec = 48000;
+    obj->object_fmtex.Format.wBitsPerSample = sizeof(float) * 8;
+    obj->object_fmtex.Format.nBlockAlign = (obj->object_fmtex.Format.nChannels * obj->object_fmtex.Format.wBitsPerSample) / 8;
+    obj->object_fmtex.Format.nAvgBytesPerSec = obj->object_fmtex.Format.nSamplesPerSec * obj->object_fmtex.Format.nBlockAlign;
+    obj->object_fmtex.Format.cbSize = 0;
+
+    hr = IMMDevice_Activate(mmdev, &IID_IAudioClient,
+            CLSCTX_INPROC_SERVER, NULL, (void**)&aclient);
+    if(FAILED(hr)){
+        WARN("Activate failed: %08x\n", hr);
+        heap_free(obj);
+        return hr;
+    }
+
+    hr = IAudioClient_IsFormatSupported(aclient, AUDCLNT_SHAREMODE_SHARED, &obj->object_fmtex.Format, &closest);
+
+    IAudioClient_Release(aclient);
+
+    if(hr == S_FALSE){
+        if(sizeof(WAVEFORMATEX) + closest->cbSize > sizeof(obj->object_fmtex)){
+            ERR("Returned format too large: %s\n", debugstr_fmtex(closest));
+            CoTaskMemFree(closest);
+            heap_free(obj);
+            return AUDCLNT_E_UNSUPPORTED_FORMAT;
+        }else if(!((closest->wFormatTag == WAVE_FORMAT_IEEE_FLOAT ||
+                    (closest->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
+                     IsEqualGUID(&((WAVEFORMATEXTENSIBLE *)closest)->SubFormat,
+                         &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))) &&
+                    closest->wBitsPerSample == 32)){
+            ERR("Returned format not 32-bit float: %s\n", debugstr_fmtex(closest));
+            CoTaskMemFree(closest);
+            heap_free(obj);
+            return AUDCLNT_E_UNSUPPORTED_FORMAT;
+        }
+        WARN("The audio stack doesn't support 48kHz 32bit float. Using the closest match. Audio may be glitchy. %s\n", debugstr_fmtex(closest));
+        memcpy(&obj->object_fmtex,
+               closest,
+               sizeof(WAVEFORMATEX) + closest->cbSize);
+        CoTaskMemFree(closest);
+    } else if(hr != S_OK){
+        WARN("Checking supported formats failed: %08x\n", hr);
+        heap_free(obj);
+        return hr;
+    }
+
+    obj->mmdev = mmdev;
+    IMMDevice_AddRef(mmdev);
+
+    *out = &obj->ISpatialAudioClient_iface;
+
+    return S_OK;
+}

include/spatialaudioclient.idl

@@ -43,6 +43,47 @@ typedef [v1_enum] enum AudioObjectType
     AudioObjectType_BackCenter       = 0x00020000,
 } AudioObjectType;
 
+cpp_quote("#define SPTLAUDCLNT_E_DESTROYED                     AUDCLNT_ERR(0x100)")
+cpp_quote("#define SPTLAUDCLNT_E_OUT_OF_ORDER                  AUDCLNT_ERR(0x101)")
+cpp_quote("#define SPTLAUDCLNT_E_RESOURCES_INVALIDATED         AUDCLNT_ERR(0x102)")
+cpp_quote("#define SPTLAUDCLNT_E_NO_MORE_OBJECTS               AUDCLNT_ERR(0x103)")
+cpp_quote("#define SPTLAUDCLNT_E_PROPERTY_NOT_SUPPORTED        AUDCLNT_ERR(0x104)")
+cpp_quote("#define SPTLAUDCLNT_E_ERRORS_IN_OBJECT_CALLS        AUDCLNT_ERR(0x105)")
+cpp_quote("#define SPTLAUDCLNT_E_METADATA_FORMAT_NOT_SUPPORTED AUDCLNT_ERR(0x106)")
+cpp_quote("#define SPTLAUDCLNT_E_STREAM_NOT_AVAILABLE          AUDCLNT_ERR(0x107)")
+cpp_quote("#define SPTLAUDCLNT_E_INVALID_LICENSE               AUDCLNT_ERR(0x108)")
+cpp_quote("#define SPTLAUDCLNT_E_STREAM_NOT_STOPPED            AUDCLNT_ERR(0x10a)")
+cpp_quote("#define SPTLAUDCLNT_E_STATIC_OBJECT_NOT_AVAILABLE   AUDCLNT_ERR(0x10b)")
+cpp_quote("#define SPTLAUDCLNT_E_OBJECT_ALREADY_ACTIVE         AUDCLNT_ERR(0x10c)")
+cpp_quote("#define SPTLAUDCLNT_E_INTERNAL                      AUDCLNT_ERR(0x10d)")
+
+interface ISpatialAudioObjectRenderStreamBase;
+
+[
+    object,
+    uuid(dddf83e6-68d7-4c70-883f-a1836afb4a50),
+    pointer_default(unique),
+    local
+]
+interface ISpatialAudioObjectRenderStreamNotify : IUnknown
+{
+    HRESULT OnAvailableDynamicObjectCountChange(
+        [in] ISpatialAudioObjectRenderStreamBase *stream,
+        [in] LONGLONG deadline,
+        [in] UINT32 object_count);
+}
+
+typedef struct tagSpatialAudioObjectRenderStreamActivationParams
+{
+    const WAVEFORMATEX *ObjectFormat;
+    AudioObjectType StaticObjectTypeMask;
+    UINT32 MinDynamicObjectCount;
+    UINT32 MaxDynamicObjectCount;
+    AUDIO_STREAM_CATEGORY Category;
+    HANDLE EventHandle;
+    ISpatialAudioObjectRenderStreamNotify *NotifyObject;
+} SpatialAudioObjectRenderStreamActivationParams;
+
 [
     object,
     uuid(dcdaa858-895a-4a22-a5eb-67bda506096d),
@@ -98,3 +139,83 @@ interface ISpatialAudioClient : IUnknown
         [in] REFIID riid,
         [out, iid_is(riid)] void **stream);
 }
+
+[
+    object,
+    uuid(cce0b8f2-8d4d-4efb-a8cf-3d6ecf1c30e0),
+    pointer_default(unique),
+    local
+]
+interface ISpatialAudioObjectBase : IUnknown
+{
+    HRESULT GetBuffer(
+        [out] BYTE **buffer,
+        [out] UINT32 *bytes);
+
+    HRESULT SetEndOfStream(
+        [in] UINT32 frames);
+
+    HRESULT IsActive(
+        [out] BOOL *active);
+
+    HRESULT GetAudioObjectType(
+        [out] AudioObjectType *type);
+}
+
+[
+    object,
+    uuid(dde28967-521b-46e5-8f00-bd6f2bc8ab1d),
+    pointer_default(unique),
+    local
+]
+interface ISpatialAudioObject : ISpatialAudioObjectBase
+{
+    HRESULT SetPosition(
+        [in] float x,
+        [in] float y,
+        [in] float z);
+
+    HRESULT SetVolume(
+        [in] float vol);
+}
+
+[
+    object,
+    uuid(feaaf403-c1d8-450d-aa05-e0ccee7502a8),
+    pointer_default(unique),
+    local
+]
+interface ISpatialAudioObjectRenderStreamBase : IUnknown
+{
+    HRESULT GetAvailableDynamicObjectCount(
+        [out] UINT32 *count);
+
+    HRESULT GetService(
+        [in] REFIID riid,
+        [out] void **service);
+
+    HRESULT Start();
+
+    HRESULT Stop();
+
+    HRESULT Reset();
+
+    HRESULT BeginUpdatingAudioObjects(
+        [out] UINT32 *count,
+        [out] UINT32 *frames);
+
+    HRESULT EndUpdatingAudioObjects();
+}
+
+[
+    object,
+    uuid(bab5f473-b423-477b-85f5-b5a332a04153),
+    pointer_default(unique),
+    local
+]
+interface ISpatialAudioObjectRenderStream : ISpatialAudioObjectRenderStreamBase
+{
+    HRESULT ActivateSpatialAudioObject(
+        [in] AudioObjectType type,
+        [out] ISpatialAudioObject **object);
+}