kc3-lang/SDL/src/audio/xaudio2/SDL_xaudio2_winrthelpers.cpp

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• Hash : fff78081
  Author :
  Date : 2013-09-06T19:07:15
  

  WinRT: made SDL_xaudio2.c compile as C code when building for WinRT XAudio2 2.8's header file, xaudio2.h, doesn't compile in plain C code for WinRT apps, not automatically at least. Initially, this file was adapted to compile as C++, however these changes are now deprecated in favor of some preprocessor based hacks that should get xaudio2.h to compile (while making sure XAudio2 still works).

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• src/audio/xaudio2/SDL_xaudio2_winrthelpers.cpp

• 
  #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
  
  extern "C" HRESULT __cdecl 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
  }
  
  extern "C" 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
  }
  

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