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

Branch : - branch - v2.28 - tag -

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• Author : David Ludwig
  Date : 2014-04-09 21:29:19
  Hash : 3dcb451f
  Message : Added a README file regarding WinRT support To note, this file is currently formatted with CRLF line endings, rather than LF, to allow the file to be viewed with Notepad.

• src/audio/xaudio2/SDL_xaudio2_winrthelpers.cpp

• /*
    Simple DirectMedia Layer
    Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely, subject to the following restrictions:
  
    1. The origin of this software must not be misrepresented; you must not
       claim that you wrote the original software. If you use this software
       in a product, an acknowledgment in the product documentation would be
       appreciated but is not required.
    2. Altered source versions must be plainly marked as such, and must not be
       misrepresented as being the original software.
    3. This notice may not be removed or altered from any source distribution.
  */
  #include "../../SDL_internal.h"
  
  #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
  }