src/audio/xaudio2/SDL_xaudio2_winrthelpers.cpp
author Sam Lantinga
Tue, 26 May 2015 06:27:46 -0700
changeset 9619 b94b6d0bff0f
parent 8616 ec011c16e2fd
child 9998 f67cf37e9cd4
permissions -rw-r--r--
Updated the copyright year to 2015
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 #include "../../SDL_internal.h"
    22 
    23 #include <xaudio2.h>
    24 #include "SDL_xaudio2_winrthelpers.h"
    25 
    26 #if WINAPI_FAMILY != WINAPI_FAMILY_PHONE_APP
    27 using Windows::Devices::Enumeration::DeviceClass;
    28 using Windows::Devices::Enumeration::DeviceInformation;
    29 using Windows::Devices::Enumeration::DeviceInformationCollection;
    30 #endif
    31 
    32 extern "C" HRESULT __cdecl IXAudio2_GetDeviceCount(IXAudio2 * ixa2, UINT32 * devcount)
    33 {
    34 #if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
    35     // There doesn't seem to be any audio device enumeration on Windows Phone.
    36     // In lieu of this, just treat things as if there is one and only one
    37     // audio device.
    38     *devcount = 1;
    39     return S_OK;
    40 #else
    41     // TODO, WinRT: make xaudio2 device enumeration only happen once, and in the background
    42     auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
    43     while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
    44     {
    45     }
    46  
    47     DeviceInformationCollection^ devices = operation->GetResults();
    48     *devcount = devices->Size;
    49     return S_OK;
    50 #endif
    51 }
    52 
    53 extern "C" HRESULT IXAudio2_GetDeviceDetails(IXAudio2 * unused, UINT32 index, XAUDIO2_DEVICE_DETAILS * details)
    54 {
    55 #if WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP
    56     // Windows Phone doesn't seem to have the same device enumeration APIs that
    57     // Windows 8/RT has, or it doesn't have them at all.  In lieu of this,
    58     // just treat things as if there is one, and only one, default device.
    59     if (index != 0)
    60     {
    61         return XAUDIO2_E_INVALID_CALL;
    62     }
    63 
    64     if (details)
    65     {
    66         wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), L"default", _TRUNCATE);
    67         wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), L"default", _TRUNCATE);
    68     }
    69     return S_OK;
    70 #else
    71     auto operation = DeviceInformation::FindAllAsync(DeviceClass::AudioRender);
    72     while (operation->Status != Windows::Foundation::AsyncStatus::Completed)
    73     {
    74     }
    75  
    76     DeviceInformationCollection^ devices = operation->GetResults();
    77     if (index >= devices->Size)
    78     {
    79         return XAUDIO2_E_INVALID_CALL;
    80     }
    81 
    82     DeviceInformation^ d = devices->GetAt(index);
    83     if (details)
    84     {
    85         wcsncpy_s(details->DeviceID, ARRAYSIZE(details->DeviceID), d->Id->Data(), _TRUNCATE);
    86         wcsncpy_s(details->DisplayName, ARRAYSIZE(details->DisplayName), d->Name->Data(), _TRUNCATE);
    87     }
    88     return S_OK;
    89 #endif
    90 }