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https://github.com/libsdl-org/SDL.git
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audio: Port WASAPI to WinRT, remove XAudio2 backend.
XAudio2 doesn't have capture support, so WASAPI was to replace it; the holdout was WinRT, which still needed it as its primary audio target until the WASAPI code code be made to work. The support matrix now looks like: WinXP: directsound by default, winmm as a fallback for buggy drivers. Vista+: WASAPI (directsound and winmm as fallbacks for debugging). WinRT: WASAPI
This commit is contained in:
Ryan C. Gordon
parent
083fe066d5
commit
351d6d4784
30 changed files with 958 additions and 1518 deletions
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@ -37,14 +37,9 @@
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#include "SDL_wasapi.h"
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static const ERole SDL_WASAPI_role = eConsole; /* !!! FIXME: should this be eMultimedia? Should be a hint? */
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/* This is global to the WASAPI target, to handle hotplug and default device lookup. */
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static IMMDeviceEnumerator *enumerator = NULL;
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/* these increment as default devices change. Opened default devices pick up changes in their threads. */
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static SDL_atomic_t default_playback_generation;
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static SDL_atomic_t default_capture_generation;
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SDL_atomic_t WASAPI_DefaultPlaybackGeneration;
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SDL_atomic_t WASAPI_DefaultCaptureGeneration;
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/* This is a list of device id strings we have inflight, so we have consistent pointers to the same device. */
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typedef struct DevIdList
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@ -55,173 +50,11 @@ typedef struct DevIdList
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static DevIdList *deviceid_list = NULL;
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/* handle to Avrt.dll--Vista and later!--for flagging the callback thread as "Pro Audio" (low latency). */
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#ifndef __WINRT__
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static HMODULE libavrt = NULL;
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#endif
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typedef HANDLE (WINAPI *pfnAvSetMmThreadCharacteristicsW)(LPWSTR,LPDWORD);
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typedef BOOL (WINAPI *pfnAvRevertMmThreadCharacteristics)(HANDLE);
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static pfnAvSetMmThreadCharacteristicsW pAvSetMmThreadCharacteristicsW = NULL;
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static pfnAvRevertMmThreadCharacteristics pAvRevertMmThreadCharacteristics = NULL;
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/* Some GUIDs we need to know without linking to libraries that aren't available before Vista. */
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static const CLSID SDL_CLSID_MMDeviceEnumerator = { 0xbcde0395, 0xe52f, 0x467c, { 0x8e, 0x3d, 0xc4, 0x57, 0x92, 0x91, 0x69, 0x2e } };
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static const IID SDL_IID_IMMDeviceEnumerator = { 0xa95664d2, 0x9614, 0x4f35, { 0xa7, 0x46, 0xde, 0x8d, 0xb6, 0x36, 0x17, 0xe6 } };
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static const IID SDL_IID_IMMNotificationClient = { 0x7991eec9, 0x7e89, 0x4d85, { 0x83, 0x90, 0x6c, 0x70, 0x3c, 0xec, 0x60, 0xc0 } };
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static const IID SDL_IID_IMMEndpoint = { 0x1be09788, 0x6894, 0x4089, { 0x85, 0x86, 0x9a, 0x2a, 0x6c, 0x26, 0x5a, 0xc5 } };
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static const IID SDL_IID_IAudioClient = { 0x1cb9ad4c, 0xdbfa, 0x4c32, { 0xb1, 0x78, 0xc2, 0xf5, 0x68, 0xa7, 0x03, 0xb2 } };
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static const IID SDL_IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483, { 0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2 } };
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static const IID SDL_IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0, { 0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17 } };
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static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010, { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
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static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010, { 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
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static const PROPERTYKEY SDL_PKEY_Device_FriendlyName = { { 0xa45c254e, 0xdf1c, 0x4efd, { 0x80, 0x20, 0x67, 0xd1, 0x46, 0xa8, 0x50, 0xe0, } }, 14 };
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/* PropVariantInit() is an inline function/macro in PropIdl.h that calls the C runtime's memset() directly. Use ours instead, to avoid dependency. */
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#ifdef PropVariantInit
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#undef PropVariantInit
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#endif
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#define PropVariantInit(p) SDL_zerop(p)
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static void AddWASAPIDevice(const SDL_bool iscapture, IMMDevice *device, LPCWSTR devid);
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static void RemoveWASAPIDevice(const SDL_bool iscapture, LPCWSTR devid);
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/* We need a COM subclass of IMMNotificationClient for hotplug support, which is
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easy in C++, but we have to tapdance more to make work in C.
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Thanks to this page for coaching on how to make this work:
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https://www.codeproject.com/Articles/13601/COM-in-plain-C */
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typedef struct SDLMMNotificationClient
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{
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const IMMNotificationClientVtbl *lpVtbl;
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SDL_atomic_t refcount;
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} SDLMMNotificationClient;
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static HRESULT STDMETHODCALLTYPE
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SDLMMNotificationClient_QueryInterface(IMMNotificationClient *this, REFIID iid, void **ppv)
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{
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if ((WIN_IsEqualIID(iid, &IID_IUnknown)) || (WIN_IsEqualIID(iid, &SDL_IID_IMMNotificationClient)))
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{
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*ppv = this;
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this->lpVtbl->AddRef(this);
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return S_OK;
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}
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*ppv = NULL;
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return E_NOINTERFACE;
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}
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static ULONG STDMETHODCALLTYPE
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SDLMMNotificationClient_AddRef(IMMNotificationClient *ithis)
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{
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SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
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return (ULONG) (SDL_AtomicIncRef(&this->refcount) + 1);
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}
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static ULONG STDMETHODCALLTYPE
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SDLMMNotificationClient_Release(IMMNotificationClient *ithis)
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{
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/* this is a static object; we don't ever free it. */
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SDLMMNotificationClient *this = (SDLMMNotificationClient *) ithis;
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const ULONG retval = SDL_AtomicDecRef(&this->refcount);
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if (retval == 0) {
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SDL_AtomicSet(&this->refcount, 0); /* uhh... */
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return 0;
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}
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return retval - 1;
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}
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/* These are the entry points called when WASAPI device endpoints change. */
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static HRESULT STDMETHODCALLTYPE
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SDLMMNotificationClient_OnDefaultDeviceChanged(IMMNotificationClient *ithis, EDataFlow flow, ERole role, LPCWSTR pwstrDeviceId)
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{
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if (role != SDL_WASAPI_role) {
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return S_OK; /* ignore it. */
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}
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/* Increment the "generation," so opened devices will pick this up in their threads. */
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switch (flow) {
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case eRender:
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SDL_AtomicAdd(&default_playback_generation, 1);
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break;
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case eCapture:
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SDL_AtomicAdd(&default_capture_generation, 1);
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break;
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case eAll:
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SDL_AtomicAdd(&default_playback_generation, 1);
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SDL_AtomicAdd(&default_capture_generation, 1);
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break;
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default:
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SDL_assert(!"uhoh, unexpected OnDefaultDeviceChange flow!");
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break;
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}
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return S_OK;
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}
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static HRESULT STDMETHODCALLTYPE
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SDLMMNotificationClient_OnDeviceAdded(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
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{
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/* we ignore this; devices added here then progress to ACTIVE, if appropriate, in
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OnDeviceStateChange, making that a better place to deal with device adds. More
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importantly: the first time you plug in a USB audio device, this callback will
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fire, but when you unplug it, it isn't removed (it's state changes to NOTPRESENT).
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Plugging it back in won't fire this callback again. */
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return S_OK;
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}
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static HRESULT STDMETHODCALLTYPE
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SDLMMNotificationClient_OnDeviceRemoved(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId)
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{
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/* See notes in OnDeviceAdded handler about why we ignore this. */
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return S_OK;
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}
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static HRESULT STDMETHODCALLTYPE
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SDLMMNotificationClient_OnDeviceStateChanged(IMMNotificationClient *ithis, LPCWSTR pwstrDeviceId, DWORD dwNewState)
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{
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IMMDevice *device = NULL;
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if (SUCCEEDED(IMMDeviceEnumerator_GetDevice(enumerator, pwstrDeviceId, &device))) {
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IMMEndpoint *endpoint = NULL;
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if (SUCCEEDED(IMMDevice_QueryInterface(device, &SDL_IID_IMMEndpoint, (void **) &endpoint))) {
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EDataFlow flow;
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if (SUCCEEDED(IMMEndpoint_GetDataFlow(endpoint, &flow))) {
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const SDL_bool iscapture = (flow == eCapture);
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if (dwNewState == DEVICE_STATE_ACTIVE) {
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AddWASAPIDevice(iscapture, device, pwstrDeviceId);
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} else {
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RemoveWASAPIDevice(iscapture, pwstrDeviceId);
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}
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}
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IMMEndpoint_Release(endpoint);
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}
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IMMDevice_Release(device);
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}
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return S_OK;
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}
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static HRESULT STDMETHODCALLTYPE
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SDLMMNotificationClient_OnPropertyValueChanged(IMMNotificationClient *this, LPCWSTR pwstrDeviceId, const PROPERTYKEY key)
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{
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return S_OK; /* we don't care about these. */
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}
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static const IMMNotificationClientVtbl notification_client_vtbl = {
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SDLMMNotificationClient_QueryInterface,
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SDLMMNotificationClient_AddRef,
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SDLMMNotificationClient_Release,
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SDLMMNotificationClient_OnDeviceStateChanged,
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SDLMMNotificationClient_OnDeviceAdded,
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SDLMMNotificationClient_OnDeviceRemoved,
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SDLMMNotificationClient_OnDefaultDeviceChanged,
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SDLMMNotificationClient_OnPropertyValueChanged
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};
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static SDLMMNotificationClient notification_client = { ¬ification_client_vtbl, { 1 } };
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static const IID SDL_IID_IAudioRenderClient = { 0xf294acfc, 0x3146, 0x4483,{ 0xa7, 0xbf, 0xad, 0xdc, 0xa7, 0xc2, 0x60, 0xe2 } };
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static const IID SDL_IID_IAudioCaptureClient = { 0xc8adbd64, 0xe71e, 0x48a0,{ 0xa4, 0xde, 0x18, 0x5c, 0x39, 0x5c, 0xd3, 0x17 } };
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static const GUID SDL_KSDATAFORMAT_SUBTYPE_PCM = { 0x00000001, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
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static const GUID SDL_KSDATAFORMAT_SUBTYPE_IEEE_FLOAT = { 0x00000003, 0x0000, 0x0010,{ 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b, 0x71 } };
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static SDL_bool
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WStrEqual(const WCHAR *a, const WCHAR *b)
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@ -236,10 +69,22 @@ WStrEqual(const WCHAR *a, const WCHAR *b)
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return *b == 0;
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}
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static size_t
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WStrLen(const WCHAR *wstr)
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{
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size_t retval = 0;
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if (wstr) {
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while (*(wstr++)) {
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retval++;
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}
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}
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return retval;
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}
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static WCHAR *
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WStrDupe(const WCHAR *wstr)
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{
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const int len = (lstrlenW(wstr) + 1) * sizeof (WCHAR);
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const int len = (WStrLen(wstr) + 1) * sizeof (WCHAR);
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WCHAR *retval = (WCHAR *) SDL_malloc(len);
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if (retval) {
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SDL_memcpy(retval, wstr, len);
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@ -247,8 +92,9 @@ WStrDupe(const WCHAR *wstr)
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return retval;
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}
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static void
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RemoveWASAPIDevice(const SDL_bool iscapture, LPCWSTR devid)
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void
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WASAPI_RemoveDevice(const SDL_bool iscapture, LPCWSTR devid)
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{
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DevIdList *i;
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DevIdList *next;
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@ -269,23 +115,16 @@ RemoveWASAPIDevice(const SDL_bool iscapture, LPCWSTR devid)
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}
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}
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static void
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AddWASAPIDevice(const SDL_bool iscapture, IMMDevice *device, LPCWSTR devid)
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void
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WASAPI_AddDevice(const SDL_bool iscapture, const char *devname, LPCWSTR devid)
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{
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IPropertyStore *props = NULL;
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char *utf8dev = NULL;
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DevIdList *devidlist;
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PROPVARIANT var;
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/* You can have multiple endpoints on a device that are mutually exclusive ("Speakers" vs "Line Out" or whatever).
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In a perfect world, things that are unplugged won't be in this collection. The only gotcha is probably for
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phones and tablets, where you might have an internal speaker and a headphone jack and expect both to be
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available and switch automatically. (!!! FIXME...?) */
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/* PKEY_Device_FriendlyName gives you "Speakers (SoundBlaster Pro)" which drives me nuts. I'd rather it be
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"SoundBlaster Pro (Speakers)" but I guess that's developers vs users. Windows uses the FriendlyName in
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its own UIs, like Volume Control, etc. */
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/* see if we already have this one. */
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for (devidlist = deviceid_list; devidlist; devidlist = devidlist->next) {
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if (WStrEqual(devidlist->str, devid)) {
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@ -308,61 +147,13 @@ AddWASAPIDevice(const SDL_bool iscapture, IMMDevice *device, LPCWSTR devid)
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devidlist->next = deviceid_list;
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deviceid_list = devidlist;
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if (SUCCEEDED(IMMDevice_OpenPropertyStore(device, STGM_READ, &props))) {
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PropVariantInit(&var);
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if (SUCCEEDED(IPropertyStore_GetValue(props, &SDL_PKEY_Device_FriendlyName, &var))) {
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utf8dev = WIN_StringToUTF8(var.pwszVal);
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if (utf8dev) {
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SDL_AddAudioDevice(iscapture, utf8dev, (void *) devid);
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SDL_free(utf8dev);
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}
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}
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PropVariantClear(&var);
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IPropertyStore_Release(props);
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}
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}
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static void
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EnumerateEndpoints(const SDL_bool iscapture)
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{
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IMMDeviceCollection *collection = NULL;
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UINT i, total;
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/* Note that WASAPI separates "adapter devices" from "audio endpoint devices"
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...one adapter device ("SoundBlaster Pro") might have multiple endpoint devices ("Speakers", "Line-Out"). */
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if (FAILED(IMMDeviceEnumerator_EnumAudioEndpoints(enumerator, iscapture ? eCapture : eRender, DEVICE_STATE_ACTIVE, &collection))) {
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return;
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}
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if (FAILED(IMMDeviceCollection_GetCount(collection, &total))) {
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IMMDeviceCollection_Release(collection);
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return;
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}
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for (i = 0; i < total; i++) {
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IMMDevice *device = NULL;
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if (SUCCEEDED(IMMDeviceCollection_Item(collection, i, &device))) {
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LPWSTR devid = NULL;
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if (SUCCEEDED(IMMDevice_GetId(device, &devid))) {
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AddWASAPIDevice(iscapture, device, devid);
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CoTaskMemFree(devid);
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}
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IMMDevice_Release(device);
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}
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}
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IMMDeviceCollection_Release(collection);
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SDL_AddAudioDevice(iscapture, devname, (void *) devid);
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}
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static void
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WASAPI_DetectDevices(void)
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{
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EnumerateEndpoints(SDL_FALSE); /* playback */
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EnumerateEndpoints(SDL_TRUE); /* capture */
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/* if this fails, we just won't get hotplug events. Carry on anyhow. */
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IMMDeviceEnumerator_RegisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) ¬ification_client);
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WASAPI_EnumerateEndpoints();
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}
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static int
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@ -372,10 +163,11 @@ WASAPI_GetPendingBytes(_THIS)
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/* it's okay to fail here; we'll deal with failures in the audio thread. */
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/* FIXME: need a lock around checking this->hidden->client */
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if (!this->hidden->client || FAILED(IAudioClient_GetCurrentPadding(this->hidden->client, &frames))) {
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return 0; /* oh well. */
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if (this->hidden->client != NULL) { /* definitely activated? */
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if (FAILED(IAudioClient_GetCurrentPadding(this->hidden->client, &frames))) {
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return 0; /* oh well. */
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}
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}
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return ((int) frames) * this->hidden->framesize;
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}
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@ -397,41 +189,9 @@ WasapiFailed(_THIS, const HRESULT err)
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return SDL_TRUE;
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}
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static int PrepWasapiDevice(_THIS, const int iscapture, IMMDevice *device);
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static void ReleaseWasapiDevice(_THIS);
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static SDL_bool
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RecoverWasapiDevice(_THIS)
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static int
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UpdateAudioStream(_THIS, const SDL_AudioSpec *oldspec)
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{
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const SDL_AudioSpec oldspec = this->spec;
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IMMDevice *device = NULL;
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HRESULT ret = S_OK;
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if (this->hidden->default_device_generation) {
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const EDataFlow dataflow = this->iscapture ? eCapture : eRender;
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ReleaseWasapiDevice(this); /* dump the lost device's handles. */
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this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ? &default_capture_generation : &default_playback_generation);
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ret = IMMDeviceEnumerator_GetDefaultAudioEndpoint(enumerator, dataflow, SDL_WASAPI_role, &device);
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if (FAILED(ret)) {
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return SDL_FALSE; /* can't find a new default device! */
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}
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} else {
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device = this->hidden->device;
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this->hidden->device = NULL; /* don't release this in ReleaseWasapiDevice(). */
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ReleaseWasapiDevice(this); /* dump the lost device's handles. */
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}
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SDL_assert(device != NULL);
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/* this can fail for lots of reasons, but the most likely is we had a
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non-default device that was disconnected, so we can't recover. Default
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devices try to reinitialize whatever the new default is, so it's more
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likely to carry on here, but this handles a non-default device that
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simply had its format changed in the Windows Control Panel. */
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if (PrepWasapiDevice(this, this->iscapture, device) == -1) {
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return SDL_FALSE;
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}
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/* Since WASAPI requires us to handle all audio conversion, and our
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device format might have changed, we might have to add/remove/change
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the audio stream that the higher level uses to convert data, so
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@ -444,9 +204,9 @@ RecoverWasapiDevice(_THIS)
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/* no need to buffer/convert in an AudioStream! */
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SDL_FreeAudioStream(this->stream);
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this->stream = NULL;
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} else if ( (oldspec.channels == this->spec.channels) &&
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(oldspec.format == this->spec.format) &&
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(oldspec.freq == this->spec.freq) ) {
|
||||
} else if ( (oldspec->channels == this->spec.channels) &&
|
||||
(oldspec->format == this->spec.format) &&
|
||||
(oldspec->freq == this->spec.freq) ) {
|
||||
/* The existing audio stream is okay to keep using. */
|
||||
} else {
|
||||
/* replace the audiostream for new format */
|
||||
|
|
@ -465,7 +225,7 @@ RecoverWasapiDevice(_THIS)
|
|||
}
|
||||
|
||||
if (!this->stream) {
|
||||
return SDL_FALSE;
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -473,13 +233,37 @@ RecoverWasapiDevice(_THIS)
|
|||
if (this->spec.size > this->work_buffer_len) {
|
||||
Uint8 *ptr = (Uint8 *) SDL_realloc(this->work_buffer, this->spec.size);
|
||||
if (ptr == NULL) {
|
||||
SDL_OutOfMemory();
|
||||
return SDL_FALSE;
|
||||
return SDL_OutOfMemory();
|
||||
}
|
||||
this->work_buffer = ptr;
|
||||
this->work_buffer_len = this->spec.size;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static void ReleaseWasapiDevice(_THIS);
|
||||
|
||||
static SDL_bool
|
||||
RecoverWasapiDevice(_THIS)
|
||||
{
|
||||
ReleaseWasapiDevice(this); /* dump the lost device's handles. */
|
||||
|
||||
if (this->hidden->default_device_generation) {
|
||||
this->hidden->default_device_generation = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
|
||||
}
|
||||
|
||||
/* this can fail for lots of reasons, but the most likely is we had a
|
||||
non-default device that was disconnected, so we can't recover. Default
|
||||
devices try to reinitialize whatever the new default is, so it's more
|
||||
likely to carry on here, but this handles a non-default device that
|
||||
simply had its format changed in the Windows Control Panel. */
|
||||
if (WASAPI_ActivateDevice(this, SDL_TRUE) == -1) {
|
||||
SDL_OpenedAudioDeviceDisconnected(this);
|
||||
return SDL_FALSE;
|
||||
}
|
||||
|
||||
this->hidden->device_lost = SDL_FALSE;
|
||||
|
||||
return SDL_TRUE; /* okay, carry on with new device details! */
|
||||
|
|
@ -495,8 +279,12 @@ RecoverWasapiIfLost(_THIS)
|
|||
return SDL_FALSE; /* already failed. */
|
||||
}
|
||||
|
||||
if (!this->hidden->client) {
|
||||
return SDL_TRUE; /* still waiting for activation. */
|
||||
}
|
||||
|
||||
if (!lost && (generation > 0)) { /* is a default device? */
|
||||
const int newgen = SDL_AtomicGet(this->iscapture ? &default_capture_generation : &default_playback_generation);
|
||||
const int newgen = SDL_AtomicGet(this->iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
|
||||
if (generation != newgen) { /* the desired default device was changed, jump over to it. */
|
||||
lost = SDL_TRUE;
|
||||
}
|
||||
|
|
@ -511,7 +299,7 @@ WASAPI_GetDeviceBuf(_THIS)
|
|||
/* get an endpoint buffer from WASAPI. */
|
||||
BYTE *buffer = NULL;
|
||||
|
||||
while (RecoverWasapiIfLost(this)) {
|
||||
while (RecoverWasapiIfLost(this) && this->hidden->render) {
|
||||
if (!WasapiFailed(this, IAudioRenderClient_GetBuffer(this->hidden->render, this->spec.samples, &buffer))) {
|
||||
return (Uint8 *) buffer;
|
||||
}
|
||||
|
|
@ -524,17 +312,18 @@ WASAPI_GetDeviceBuf(_THIS)
|
|||
static void
|
||||
WASAPI_PlayDevice(_THIS)
|
||||
{
|
||||
/* WasapiFailed() will mark the device for reacquisition or removal elsewhere. */
|
||||
WasapiFailed(this, IAudioRenderClient_ReleaseBuffer(this->hidden->render, this->spec.samples, 0));
|
||||
if (this->hidden->render != NULL) { /* definitely activated? */
|
||||
/* WasapiFailed() will mark the device for reacquisition or removal elsewhere. */
|
||||
WasapiFailed(this, IAudioRenderClient_ReleaseBuffer(this->hidden->render, this->spec.samples, 0));
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
WASAPI_WaitDevice(_THIS)
|
||||
{
|
||||
const UINT32 maxpadding = this->spec.samples;
|
||||
while (RecoverWasapiIfLost(this)) {
|
||||
while (RecoverWasapiIfLost(this) && this->hidden->client) {
|
||||
const UINT32 maxpadding = this->spec.samples;
|
||||
UINT32 padding = 0;
|
||||
|
||||
if (!WasapiFailed(this, IAudioClient_GetCurrentPadding(this->hidden->client, &padding))) {
|
||||
if (padding <= maxpadding) {
|
||||
break;
|
||||
|
|
@ -562,6 +351,14 @@ WASAPI_CaptureFromDevice(_THIS, void *buffer, int buflen)
|
|||
UINT32 frames = 0;
|
||||
DWORD flags = 0;
|
||||
|
||||
/* uhoh, client isn't activated yet, just return silence. */
|
||||
if (!this->hidden->capture) {
|
||||
/* Delay so we run at about the speed that audio would be arriving. */
|
||||
SDL_Delay(((this->spec.samples * 1000) / this->spec.freq));
|
||||
SDL_memset(buffer, this->spec.silence, buflen);
|
||||
return buflen;
|
||||
}
|
||||
|
||||
ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL);
|
||||
if (ret != AUDCLNT_S_BUFFER_EMPTY) {
|
||||
WasapiFailed(this, ret); /* mark device lost/failed if necessary. */
|
||||
|
|
@ -609,6 +406,10 @@ WASAPI_FlushCapture(_THIS)
|
|||
UINT32 frames = 0;
|
||||
DWORD flags = 0;
|
||||
|
||||
if (!this->hidden->capture) {
|
||||
return; /* not activated yet? */
|
||||
}
|
||||
|
||||
/* just read until we stop getting packets, throwing them away. */
|
||||
while (SDL_TRUE) {
|
||||
const HRESULT ret = IAudioCaptureClient_GetBuffer(this->hidden->capture, &ptr, &frames, &flags, NULL, NULL);
|
||||
|
|
@ -646,30 +447,49 @@ ReleaseWasapiDevice(_THIS)
|
|||
this->hidden->waveformat = NULL;
|
||||
}
|
||||
|
||||
if (this->hidden->device) {
|
||||
IMMDevice_Release(this->hidden->device);
|
||||
this->hidden->device = NULL;
|
||||
}
|
||||
|
||||
if (this->hidden->capturestream) {
|
||||
SDL_FreeAudioStream(this->hidden->capturestream);
|
||||
this->hidden->capturestream = NULL;
|
||||
}
|
||||
|
||||
if (this->hidden->activation_handler) {
|
||||
WASAPI_PlatformDeleteActivationHandler(this->hidden->activation_handler);
|
||||
this->hidden->activation_handler = NULL;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
WASAPI_CloseDevice(_THIS)
|
||||
{
|
||||
WASAPI_UnrefDevice(this);
|
||||
}
|
||||
|
||||
void
|
||||
WASAPI_RefDevice(_THIS)
|
||||
{
|
||||
SDL_AtomicIncRef(&this->hidden->refcount);
|
||||
}
|
||||
|
||||
void
|
||||
WASAPI_UnrefDevice(_THIS)
|
||||
{
|
||||
if (!SDL_AtomicDecRef(&this->hidden->refcount)) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* actual closing happens here. */
|
||||
|
||||
/* don't touch this->hidden->task in here; it has to be reverted from
|
||||
our callback thread. We do that in WASAPI_ThreadDeinit().
|
||||
(likewise for this->hidden->coinitialized). */
|
||||
our callback thread. We do that in WASAPI_ThreadDeinit().
|
||||
(likewise for this->hidden->coinitialized). */
|
||||
ReleaseWasapiDevice(this);
|
||||
SDL_free(this->hidden->devid);
|
||||
SDL_free(this->hidden);
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
PrepWasapiDevice(_THIS, const int iscapture, IMMDevice *device)
|
||||
/* This is called once a device is activated, possibly asynchronously. */
|
||||
int
|
||||
WASAPI_PrepDevice(_THIS, const SDL_bool updatestream)
|
||||
{
|
||||
/* !!! FIXME: we could request an exclusive mode stream, which is lower latency;
|
||||
!!! it will write into the kernel's audio buffer directly instead of
|
||||
|
|
@ -682,10 +502,11 @@ PrepWasapiDevice(_THIS, const int iscapture, IMMDevice *device)
|
|||
!!! wins actually look like. Maybe add a hint to force exclusive mode at
|
||||
!!! some point. To be sure, defaulting to shared mode is the right thing to
|
||||
!!! do in any case. */
|
||||
const SDL_AudioSpec oldspec = this->spec;
|
||||
const AUDCLNT_SHAREMODE sharemode = AUDCLNT_SHAREMODE_SHARED;
|
||||
UINT32 bufsize = 0; /* this is in sample frames, not samples, not bytes. */
|
||||
REFERENCE_TIME duration = 0;
|
||||
IAudioClient *client = NULL;
|
||||
IAudioClient *client = this->hidden->client;
|
||||
IAudioRenderClient *render = NULL;
|
||||
IAudioCaptureClient *capture = NULL;
|
||||
WAVEFORMATEX *waveformat = NULL;
|
||||
|
|
@ -694,15 +515,7 @@ PrepWasapiDevice(_THIS, const int iscapture, IMMDevice *device)
|
|||
SDL_bool valid_format = SDL_FALSE;
|
||||
HRESULT ret = S_OK;
|
||||
|
||||
this->hidden->device = device;
|
||||
|
||||
ret = IMMDevice_Activate(device, &SDL_IID_IAudioClient, CLSCTX_ALL, NULL, (void **) &client);
|
||||
if (FAILED(ret)) {
|
||||
return WIN_SetErrorFromHRESULT("WASAPI can't activate audio endpoint", ret);
|
||||
}
|
||||
|
||||
SDL_assert(client != NULL);
|
||||
this->hidden->client = client;
|
||||
|
||||
ret = IAudioClient_GetMixFormat(client, &waveformat);
|
||||
if (FAILED(ret)) {
|
||||
|
|
@ -763,7 +576,7 @@ PrepWasapiDevice(_THIS, const int iscapture, IMMDevice *device)
|
|||
}
|
||||
|
||||
this->spec.samples = (Uint16) bufsize;
|
||||
if (!iscapture) {
|
||||
if (!this->iscapture) {
|
||||
this->spec.samples /= 2; /* fill half of the DMA buffer on each run. */
|
||||
}
|
||||
|
||||
|
|
@ -772,7 +585,7 @@ PrepWasapiDevice(_THIS, const int iscapture, IMMDevice *device)
|
|||
|
||||
this->hidden->framesize = (SDL_AUDIO_BITSIZE(this->spec.format) / 8) * this->spec.channels;
|
||||
|
||||
if (iscapture) {
|
||||
if (this->iscapture) {
|
||||
this->hidden->capturestream = SDL_NewAudioStream(this->spec.format, this->spec.channels, this->spec.freq, this->spec.format, this->spec.channels, this->spec.freq);
|
||||
if (!this->hidden->capturestream) {
|
||||
return -1; /* already set SDL_Error */
|
||||
|
|
@ -805,15 +618,20 @@ PrepWasapiDevice(_THIS, const int iscapture, IMMDevice *device)
|
|||
}
|
||||
}
|
||||
|
||||
if (updatestream) {
|
||||
if (UpdateAudioStream(this, &oldspec) == -1) {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0; /* good to go. */
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
WASAPI_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
|
||||
{
|
||||
const SDL_bool is_default_device = (handle == NULL);
|
||||
IMMDevice *device = NULL;
|
||||
HRESULT ret = S_OK;
|
||||
LPCWSTR devid = (LPCWSTR) handle;
|
||||
|
||||
/* Initialize all variables that we clean on shutdown */
|
||||
this->hidden = (struct SDL_PrivateAudioData *)
|
||||
|
|
@ -823,49 +641,42 @@ WASAPI_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
|
|||
}
|
||||
SDL_zerop(this->hidden);
|
||||
|
||||
if (is_default_device) {
|
||||
const EDataFlow dataflow = iscapture ? eCapture : eRender;
|
||||
this->hidden->default_device_generation = SDL_AtomicGet(iscapture ? &default_capture_generation : &default_playback_generation);
|
||||
ret = IMMDeviceEnumerator_GetDefaultAudioEndpoint(enumerator, dataflow, SDL_WASAPI_role, &device);
|
||||
WASAPI_RefDevice(this); /* so CloseDevice() will unref to zero. */
|
||||
|
||||
if (!devid) { /* is default device? */
|
||||
this->hidden->default_device_generation = SDL_AtomicGet(iscapture ? &WASAPI_DefaultCaptureGeneration : &WASAPI_DefaultPlaybackGeneration);
|
||||
} else {
|
||||
ret = IMMDeviceEnumerator_GetDevice(enumerator, (LPCWSTR) handle, &device);
|
||||
this->hidden->devid = WStrDupe(devid);
|
||||
if (!this->hidden->devid) {
|
||||
return SDL_OutOfMemory();
|
||||
}
|
||||
}
|
||||
|
||||
if (FAILED(ret)) {
|
||||
return WIN_SetErrorFromHRESULT("WASAPI can't find requested audio endpoint", ret);
|
||||
if (WASAPI_ActivateDevice(this, SDL_FALSE) == -1) {
|
||||
return -1; /* already set error. */
|
||||
}
|
||||
|
||||
SDL_assert(device != NULL);
|
||||
return PrepWasapiDevice(this, iscapture, device);
|
||||
/* Ready, but waiting for async device activation.
|
||||
Until activation is successful, we will report silence from capture
|
||||
devices and ignore data on playback devices.
|
||||
Also, since we don't know the _actual_ device format until after
|
||||
activation, we let the app have whatever it asks for. We set up
|
||||
an SDL_AudioStream to convert, if necessary, once the activation
|
||||
completes. */
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
WASAPI_ThreadInit(_THIS)
|
||||
{
|
||||
/* this thread uses COM. */
|
||||
if (SUCCEEDED(WIN_CoInitialize())) { /* can't report errors, hope it worked! */
|
||||
this->hidden->coinitialized = SDL_TRUE;
|
||||
}
|
||||
|
||||
/* Set this thread to very high "Pro Audio" priority. */
|
||||
if (pAvSetMmThreadCharacteristicsW) {
|
||||
DWORD idx = 0;
|
||||
this->hidden->task = pAvSetMmThreadCharacteristicsW(TEXT("Pro Audio"), &idx);
|
||||
}
|
||||
WASAPI_PlatformThreadInit(this);
|
||||
}
|
||||
|
||||
static void
|
||||
WASAPI_ThreadDeinit(_THIS)
|
||||
{
|
||||
/* Set this thread to very high "Pro Audio" priority. */
|
||||
if (this->hidden->task && pAvRevertMmThreadCharacteristics) {
|
||||
pAvRevertMmThreadCharacteristics(this->hidden->task);
|
||||
this->hidden->task = NULL;
|
||||
}
|
||||
|
||||
if (this->hidden->coinitialized) {
|
||||
WIN_CoUninitialize();
|
||||
}
|
||||
WASAPI_PlatformThreadDeinit(this);
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -874,21 +685,7 @@ WASAPI_Deinitialize(void)
|
|||
DevIdList *devidlist;
|
||||
DevIdList *next;
|
||||
|
||||
if (enumerator) {
|
||||
IMMDeviceEnumerator_UnregisterEndpointNotificationCallback(enumerator, (IMMNotificationClient *) ¬ification_client);
|
||||
IMMDeviceEnumerator_Release(enumerator);
|
||||
enumerator = NULL;
|
||||
}
|
||||
|
||||
#ifndef __WINRT__
|
||||
if (libavrt) {
|
||||
FreeLibrary(libavrt);
|
||||
libavrt = NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
pAvSetMmThreadCharacteristicsW = NULL;
|
||||
pAvRevertMmThreadCharacteristics = NULL;
|
||||
WASAPI_PlatformDeinit();
|
||||
|
||||
for (devidlist = deviceid_list; devidlist; devidlist = next) {
|
||||
next = devidlist->next;
|
||||
|
|
@ -896,51 +693,23 @@ WASAPI_Deinitialize(void)
|
|||
SDL_free(devidlist);
|
||||
}
|
||||
deviceid_list = NULL;
|
||||
|
||||
WIN_CoUninitialize();
|
||||
}
|
||||
|
||||
static int
|
||||
WASAPI_Init(SDL_AudioDriverImpl * impl)
|
||||
{
|
||||
HRESULT ret;
|
||||
SDL_AtomicSet(&WASAPI_DefaultPlaybackGeneration, 1);
|
||||
SDL_AtomicSet(&WASAPI_DefaultCaptureGeneration, 1);
|
||||
|
||||
/* just skip the discussion with COM here. */
|
||||
if (!WIN_IsWindowsVistaOrGreater()) {
|
||||
SDL_SetError("WASAPI support requires Windows Vista or later");
|
||||
if (WASAPI_PlatformInit() == -1) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
SDL_AtomicSet(&default_playback_generation, 1);
|
||||
SDL_AtomicSet(&default_capture_generation, 1);
|
||||
|
||||
if (FAILED(WIN_CoInitialize())) {
|
||||
SDL_SetError("WASAPI: CoInitialize() failed");
|
||||
return 0;
|
||||
}
|
||||
|
||||
ret = CoCreateInstance(&SDL_CLSID_MMDeviceEnumerator, NULL, CLSCTX_INPROC_SERVER, &SDL_IID_IMMDeviceEnumerator, (LPVOID) &enumerator);
|
||||
if (FAILED(ret)) {
|
||||
WIN_CoUninitialize();
|
||||
WIN_SetErrorFromHRESULT("WASAPI CoCreateInstance(MMDeviceEnumerator)", ret);
|
||||
return 0; /* oh well. */
|
||||
}
|
||||
|
||||
#ifdef __WINRT__
|
||||
pAvSetMmThreadCharacteristicsW = AvSetMmThreadCharacteristicsW;
|
||||
pAvRevertMmThreadCharacteristics = AvRevertMmThreadCharacteristics;
|
||||
#else
|
||||
libavrt = LoadLibraryW(L"avrt.dll"); /* this library is available in Vista and later. No WinXP, so have to LoadLibrary to use it for now! */
|
||||
if (libavrt) {
|
||||
pAvSetMmThreadCharacteristicsW = (pfnAvSetMmThreadCharacteristicsW) GetProcAddress(libavrt, "AvSetMmThreadCharacteristicsW");
|
||||
pAvRevertMmThreadCharacteristics = (pfnAvRevertMmThreadCharacteristics) GetProcAddress(libavrt, "AvRevertMmThreadCharacteristics");
|
||||
}
|
||||
#endif
|
||||
|
||||
/* Set the function pointers */
|
||||
impl->DetectDevices = WASAPI_DetectDevices;
|
||||
impl->ThreadInit = WASAPI_ThreadInit;
|
||||
impl->ThreadDeinit = WASAPI_ThreadDeinit;
|
||||
impl->BeginLoopIteration = WASAPI_BeginLoopIteration;
|
||||
impl->OpenDevice = WASAPI_OpenDevice;
|
||||
impl->PlayDevice = WASAPI_PlayDevice;
|
||||
impl->WaitDevice = WASAPI_WaitDevice;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue