| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2021 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" |
| |
| // This is C++/CX code that the WinRT port uses to talk to WASAPI-related |
| // system APIs. The C implementation of these functions, for non-WinRT apps, |
| // is in SDL_wasapi_win32.c. The code in SDL_wasapi.c is used by both standard |
| // Windows and WinRT builds to deal with audio and calls into these functions. |
| |
| #if SDL_AUDIO_DRIVER_WASAPI && defined(__WINRT__) |
| |
| #include <Windows.h> |
| #include <windows.ui.core.h> |
| #include <windows.devices.enumeration.h> |
| #include <windows.media.devices.h> |
| #include <wrl/implements.h> |
| |
| extern "C" { |
| #include "../../core/windows/SDL_windows.h" |
| #include "SDL_audio.h" |
| #include "SDL_timer.h" |
| #include "../SDL_audio_c.h" |
| #include "../SDL_sysaudio.h" |
| } |
| |
| #define COBJMACROS |
| #include <mmdeviceapi.h> |
| #include <audioclient.h> |
| |
| #include "SDL_wasapi.h" |
| |
| using namespace Windows::Devices::Enumeration; |
| using namespace Windows::Media::Devices; |
| using namespace Windows::Foundation; |
| using namespace Microsoft::WRL; |
| |
| class SDL_WasapiDeviceEventHandler |
| { |
| public: |
| SDL_WasapiDeviceEventHandler(const SDL_bool _iscapture); |
| ~SDL_WasapiDeviceEventHandler(); |
| void OnDeviceAdded(DeviceWatcher^ sender, DeviceInformation^ args); |
| void OnDeviceRemoved(DeviceWatcher^ sender, DeviceInformationUpdate^ args); |
| void OnDeviceUpdated(DeviceWatcher^ sender, DeviceInformationUpdate^ args); |
| void OnEnumerationCompleted(DeviceWatcher^ sender, Platform::Object^ args); |
| void OnDefaultRenderDeviceChanged(Platform::Object^ sender, DefaultAudioRenderDeviceChangedEventArgs^ args); |
| void OnDefaultCaptureDeviceChanged(Platform::Object^ sender, DefaultAudioCaptureDeviceChangedEventArgs^ args); |
| SDL_semaphore* completed; |
| |
| private: |
| const SDL_bool iscapture; |
| DeviceWatcher^ watcher; |
| Windows::Foundation::EventRegistrationToken added_handler; |
| Windows::Foundation::EventRegistrationToken removed_handler; |
| Windows::Foundation::EventRegistrationToken updated_handler; |
| Windows::Foundation::EventRegistrationToken completed_handler; |
| Windows::Foundation::EventRegistrationToken default_changed_handler; |
| }; |
| |
| SDL_WasapiDeviceEventHandler::SDL_WasapiDeviceEventHandler(const SDL_bool _iscapture) |
| : iscapture(_iscapture) |
| , completed(SDL_CreateSemaphore(0)) |
| , watcher(DeviceInformation::CreateWatcher(_iscapture ? DeviceClass::AudioCapture : DeviceClass::AudioRender)) |
| { |
| if (!watcher || !completed) |
| return; // uhoh. |
| |
| // !!! FIXME: this doesn't need a lambda here, I think, if I make SDL_WasapiDeviceEventHandler a proper C++/CX class. --ryan. |
| added_handler = watcher->Added += ref new TypedEventHandler<DeviceWatcher^, DeviceInformation^>([this](DeviceWatcher^ sender, DeviceInformation^ args) { OnDeviceAdded(sender, args); } ); |
| removed_handler = watcher->Removed += ref new TypedEventHandler<DeviceWatcher^, DeviceInformationUpdate^>([this](DeviceWatcher^ sender, DeviceInformationUpdate^ args) { OnDeviceRemoved(sender, args); } ); |
| updated_handler = watcher->Updated += ref new TypedEventHandler<DeviceWatcher^, DeviceInformationUpdate^>([this](DeviceWatcher^ sender, DeviceInformationUpdate^ args) { OnDeviceUpdated(sender, args); } ); |
| completed_handler = watcher->EnumerationCompleted += ref new TypedEventHandler<DeviceWatcher^, Platform::Object^>([this](DeviceWatcher^ sender, Platform::Object^ args) { OnEnumerationCompleted(sender, args); } ); |
| if (iscapture) { |
| default_changed_handler = MediaDevice::DefaultAudioCaptureDeviceChanged += ref new TypedEventHandler<Platform::Object^, DefaultAudioCaptureDeviceChangedEventArgs^>([this](Platform::Object^ sender, DefaultAudioCaptureDeviceChangedEventArgs^ args) { OnDefaultCaptureDeviceChanged(sender, args); } ); |
| } else { |
| default_changed_handler = MediaDevice::DefaultAudioRenderDeviceChanged += ref new TypedEventHandler<Platform::Object^, DefaultAudioRenderDeviceChangedEventArgs^>([this](Platform::Object^ sender, DefaultAudioRenderDeviceChangedEventArgs^ args) { OnDefaultRenderDeviceChanged(sender, args); } ); |
| } |
| watcher->Start(); |
| } |
| |
| SDL_WasapiDeviceEventHandler::~SDL_WasapiDeviceEventHandler() |
| { |
| if (watcher) { |
| watcher->Added -= added_handler; |
| watcher->Removed -= removed_handler; |
| watcher->Updated -= updated_handler; |
| watcher->EnumerationCompleted -= completed_handler; |
| watcher->Stop(); |
| watcher = nullptr; |
| } |
| if (completed) { |
| SDL_DestroySemaphore(completed); |
| completed = nullptr; |
| } |
| |
| if (iscapture) { |
| MediaDevice::DefaultAudioCaptureDeviceChanged -= default_changed_handler; |
| } else { |
| MediaDevice::DefaultAudioRenderDeviceChanged -= default_changed_handler; |
| } |
| } |
| |
| void |
| SDL_WasapiDeviceEventHandler::OnDeviceAdded(DeviceWatcher^ sender, DeviceInformation^ info) |
| { |
| SDL_assert(sender == this->watcher); |
| char *utf8dev = WIN_StringToUTF8(info->Name->Data()); |
| if (utf8dev) { |
| WASAPI_AddDevice(this->iscapture, utf8dev, info->Id->Data()); |
| SDL_free(utf8dev); |
| } |
| } |
| |
| void |
| SDL_WasapiDeviceEventHandler::OnDeviceRemoved(DeviceWatcher^ sender, DeviceInformationUpdate^ info) |
| { |
| SDL_assert(sender == this->watcher); |
| WASAPI_RemoveDevice(this->iscapture, info->Id->Data()); |
| } |
| |
| void |
| SDL_WasapiDeviceEventHandler::OnDeviceUpdated(DeviceWatcher^ sender, DeviceInformationUpdate^ args) |
| { |
| SDL_assert(sender == this->watcher); |
| } |
| |
| void |
| SDL_WasapiDeviceEventHandler::OnEnumerationCompleted(DeviceWatcher^ sender, Platform::Object^ args) |
| { |
| SDL_assert(sender == this->watcher); |
| SDL_SemPost(this->completed); |
| } |
| |
| void |
| SDL_WasapiDeviceEventHandler::OnDefaultRenderDeviceChanged(Platform::Object^ sender, DefaultAudioRenderDeviceChangedEventArgs^ args) |
| { |
| SDL_assert(this->iscapture); |
| SDL_AtomicAdd(&WASAPI_DefaultPlaybackGeneration, 1); |
| } |
| |
| void |
| SDL_WasapiDeviceEventHandler::OnDefaultCaptureDeviceChanged(Platform::Object^ sender, DefaultAudioCaptureDeviceChangedEventArgs^ args) |
| { |
| SDL_assert(!this->iscapture); |
| SDL_AtomicAdd(&WASAPI_DefaultCaptureGeneration, 1); |
| } |
| |
| |
| static SDL_WasapiDeviceEventHandler *playback_device_event_handler; |
| static SDL_WasapiDeviceEventHandler *capture_device_event_handler; |
| |
| int WASAPI_PlatformInit(void) |
| { |
| return 0; |
| } |
| |
| void WASAPI_PlatformDeinit(void) |
| { |
| delete playback_device_event_handler; |
| playback_device_event_handler = nullptr; |
| delete capture_device_event_handler; |
| capture_device_event_handler = nullptr; |
| } |
| |
| void WASAPI_EnumerateEndpoints(void) |
| { |
| // DeviceWatchers will fire an Added event for each existing device at |
| // startup, so we don't need to enumerate them separately before |
| // listening for updates. |
| playback_device_event_handler = new SDL_WasapiDeviceEventHandler(SDL_FALSE); |
| capture_device_event_handler = new SDL_WasapiDeviceEventHandler(SDL_TRUE); |
| SDL_SemWait(playback_device_event_handler->completed); |
| SDL_SemWait(capture_device_event_handler->completed); |
| } |
| |
| struct SDL_WasapiActivationHandler : public RuntimeClass< RuntimeClassFlags< ClassicCom >, FtmBase, IActivateAudioInterfaceCompletionHandler > |
| { |
| SDL_WasapiActivationHandler() : device(nullptr) {} |
| STDMETHOD(ActivateCompleted)(IActivateAudioInterfaceAsyncOperation *operation); |
| SDL_AudioDevice *device; |
| }; |
| |
| HRESULT |
| SDL_WasapiActivationHandler::ActivateCompleted(IActivateAudioInterfaceAsyncOperation *async) |
| { |
| // Just set a flag, since we're probably in a different thread. We'll pick it up and init everything on our own thread to prevent races. |
| SDL_AtomicSet(&device->hidden->just_activated, 1); |
| WASAPI_UnrefDevice(device); |
| return S_OK; |
| } |
| |
| void |
| WASAPI_PlatformDeleteActivationHandler(void *handler) |
| { |
| ((SDL_WasapiActivationHandler *) handler)->Release(); |
| } |
| |
| int |
| WASAPI_ActivateDevice(_THIS, const SDL_bool isrecovery) |
| { |
| LPCWSTR devid = _this->hidden->devid; |
| Platform::String^ defdevid; |
| |
| if (devid == nullptr) { |
| defdevid = _this->iscapture ? MediaDevice::GetDefaultAudioCaptureId(AudioDeviceRole::Default) : MediaDevice::GetDefaultAudioRenderId(AudioDeviceRole::Default); |
| if (defdevid) { |
| devid = defdevid->Data(); |
| } |
| } |
| |
| SDL_AtomicSet(&_this->hidden->just_activated, 0); |
| |
| ComPtr<SDL_WasapiActivationHandler> handler = Make<SDL_WasapiActivationHandler>(); |
| if (handler == nullptr) { |
| return SDL_SetError("Failed to allocate WASAPI activation handler"); |
| } |
| |
| handler.Get()->AddRef(); // we hold a reference after ComPtr destructs on return, causing a Release, and Release ourselves in WASAPI_PlatformDeleteActivationHandler(), etc. |
| handler.Get()->device = _this; |
| _this->hidden->activation_handler = handler.Get(); |
| |
| WASAPI_RefDevice(_this); /* completion handler will unref it. */ |
| IActivateAudioInterfaceAsyncOperation *async = nullptr; |
| const HRESULT ret = ActivateAudioInterfaceAsync(devid, __uuidof(IAudioClient), nullptr, handler.Get(), &async); |
| |
| if (FAILED(ret) || async == nullptr) { |
| if (async != nullptr) { |
| async->Release(); |
| } |
| handler.Get()->Release(); |
| WASAPI_UnrefDevice(_this); |
| return WIN_SetErrorFromHRESULT("WASAPI can't activate requested audio endpoint", ret); |
| } |
| |
| /* Spin until the async operation is complete. |
| * If we don't PrepDevice before leaving this function, the bug list gets LONG: |
| * - device.spec is not filled with the correct information |
| * - The 'obtained' spec will be wrong for ALLOW_CHANGE properties |
| * - SDL_AudioStreams will/will not be allocated at the right time |
| * - SDL_assert(device->callbackspec.size == device->spec.size) will fail |
| * - When the assert is ignored, skipping or a buffer overflow will occur |
| */ |
| while (!SDL_AtomicCAS(&_this->hidden->just_activated, 1, 0)) { |
| SDL_Delay(1); |
| } |
| |
| HRESULT activateRes = S_OK; |
| IUnknown *iunknown = nullptr; |
| const HRESULT getActivateRes = async->GetActivateResult(&activateRes, &iunknown); |
| async->Release(); |
| if (FAILED(getActivateRes)) { |
| return WIN_SetErrorFromHRESULT("Failed to get WASAPI activate result", getActivateRes); |
| } else if (FAILED(activateRes)) { |
| return WIN_SetErrorFromHRESULT("Failed to activate WASAPI device", activateRes); |
| } |
| |
| iunknown->QueryInterface(IID_PPV_ARGS(&_this->hidden->client)); |
| if (!_this->hidden->client) { |
| return SDL_SetError("Failed to query WASAPI client interface"); |
| } |
| |
| if (WASAPI_PrepDevice(_this, isrecovery) == -1) { |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| void |
| WASAPI_PlatformThreadInit(_THIS) |
| { |
| // !!! FIXME: set this thread to "Pro Audio" priority. |
| } |
| |
| void |
| WASAPI_PlatformThreadDeinit(_THIS) |
| { |
| // !!! FIXME: set this thread to "Pro Audio" priority. |
| } |
| |
| #endif // SDL_AUDIO_DRIVER_WASAPI && defined(__WINRT__) |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |