WinRT: merged with SDL 2.0.0 codebase (aka. SDL hg rev d4ce48ff30d1)

src/audio/xaudio2/SDL_xaudio2_winrthelpers.cpp

@@ -0,0 +1,69 @@
+
+#include <xaudio2.h>
+#include "SDL_xaudio2_winrthelpers.h"
+
+#if WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP
+using Windows::Devices::Enumeration::DeviceClass;
+using Windows::Devices::Enumeration::DeviceInformation;
+using Windows::Devices::Enumeration::DeviceInformationCollection;
+#endif
+
+HRESULT IXAudio2_GetDeviceCount(IXAudio2 * ixa2, UINT32 * devcount)
+{
+#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
+    // There doesn't seem to be any audio device enumeration on Windows Phone.
+    // In lieu of this, just treat things as if there is one and only one
+    // audio device.
+    *devcount = 1;
+    return S_OK;
+#else
+    // TODO, WinRT: make xaudio2 device enumeration only happen once, and in the background
+    auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
+    while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
+    {
+    }
+ 
+    DeviceInformationCollection^ devices = operation->GetResults();
+    *devcount = devices->Size;
+    return S_OK;
+#endif
+}
+
+HRESULT IXAudio2_GetDeviceDetails(IXAudio2 * unused, UINT32 index, XAUDIO2_DEVICE_DETAILS * details)
+{
+#if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
+    // Windows Phone doesn't seem to have the same device enumeration APIs that
+    // Windows 8/RT has, or it doesn't have them at all.  In lieu of this,
+    // just treat things as if there is one, and only one, default device.
+    if (index != 0)
+    {
+        return XAUDIO2_E_INVALID_CALL;
+    }
+
+    if (details)
+    {
+        wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), L"default", _TRUNCATE);
+        wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), L"default", _TRUNCATE);
+    }
+    return S_OK;
+#else
+    auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
+    while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
+    {
+    }
+ 
+    DeviceInformationCollection^ devices = operation->GetResults();
+    if (index >= devices->Size)
+    {
+        return XAUDIO2_E_INVALID_CALL;
+    }
+
+    DeviceInformation^ d = devices->GetAt(index);
+    if (details)
+    {
+        wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), d->Id->Data(), _TRUNCATE);
+        wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), d->Name->Data(), _TRUNCATE);
+    }
+    return S_OK;
+#endif
+}

src/audio/xaudio2/SDL_xaudio2_winrthelpers.h

@@ -0,0 +1,40 @@
+
+#pragma once
+
+//
+// Re-implementation of methods removed from XAudio2 (in Windows RT):
+//
+
+typedef struct XAUDIO2_DEVICE_DETAILS
+{
+    WCHAR DeviceID[256];
+    WCHAR DisplayName[256];
+    /* Other fields exist in the pre-Windows 8 version of this struct, however
+       they weren't used by SDL, so they weren't added.
+    */
+} XAUDIO2_DEVICE_DETAILS;
+
+HRESULT IXAudio2_GetDeviceCount(IXAudio2 * unused, UINT32 * devcount);
+HRESULT IXAudio2_GetDeviceDetails(IXAudio2 * unused, UINT32 index, XAUDIO2_DEVICE_DETAILS * details);
+
+
+//
+// C-style macros to call XAudio2's methods in C++:
+//
+
+#define IXAudio2_CreateMasteringVoice(A, B, C, D, E, F, G) (A)->CreateMasteringVoice((B), (C), (D), (E), (F), (G))
+#define IXAudio2_CreateSourceVoice(A, B, C, D, E, F, G, H) (A)->CreateSourceVoice((B), (C), (D), (E), (F), (G), (H))
+#define IXAudio2_QueryInterface(A, B, C) (A)->QueryInterface((B), (C))
+#define IXAudio2_Release(A) (A)->Release()
+#define IXAudio2_StartEngine(A) (A)->StartEngine()
+#define IXAudio2_StopEngine(A) (A)->StopEngine()
+
+#define IXAudio2MasteringVoice_DestroyVoice(A) (A)->DestroyVoice()
+
+#define IXAudio2SourceVoice_DestroyVoice(A) (A)->DestroyVoice()
+#define IXAudio2SourceVoice_Discontinuity(A) (A)->Discontinuity()
+#define IXAudio2SourceVoice_FlushSourceBuffers(A) (A)->FlushSourceBuffers()
+#define IXAudio2SourceVoice_GetState(A, B) (A)->GetState((B))
+#define IXAudio2SourceVoice_Start(A, B, C) (A)->Start((B), (C))
+#define IXAudio2SourceVoice_Stop(A, B, C) (A)->Stop((B), (C))
+#define IXAudio2SourceVoice_SubmitSourceBuffer(A, B, C) (A)->SubmitSourceBuffer((B), (C))