DrvHostAudioWasApi.cpp@ 102596

Last change on this file since 102596 was 102596, checked in by vboxsync, 12 months ago
Audio/WAS: Attempt to fix crashes when invalidating the cached audio interfaces of the device entry configurations. This is needed when the audio interface becomes invalid on a host device switch. Extended logging a bit. bugref:10503
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File size: 130.9 KB

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1	/* $Id: DrvHostAudioWasApi.cpp 102596 2023-12-14 15:14:24Z vboxsync $ */
2	/** @file
3	* Host audio driver - Windows Audio Session API.
4	*/
5
6	/*
7	* Copyright (C) 2021-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
33	/#define INITGUID - defined in VBoxhostAudioDSound.cpp already /
34	#include <VBox/log.h>
35	#include <iprt/win/windows.h>
36	#include <Mmdeviceapi.h>
37	#include <iprt/win/audioclient.h>
38	#include <functiondiscoverykeys_devpkey.h>
39	#include <AudioSessionTypes.h>
40	#ifndef AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY
41	# define AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY UINT32_C(0x08000000)
42	#endif
43	#ifndef AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM
44	# define AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM UINT32_C(0x80000000)
45	#endif
46
47	#include <VBox/vmm/pdmaudioinline.h>
48	#include <VBox/vmm/pdmaudiohostenuminline.h>
49
50	#include <iprt/rand.h>
51	#include <iprt/semaphore.h>
52	#include <iprt/utf16.h>
53	#include <iprt/uuid.h>
54
55	#include <new> /* std::bad_alloc */
56
57	#include "VBoxDD.h"
58
59
60	/*********************************************************************************************************************************
61	* Defined Constants And Macros *
62	*********************************************************************************************************************************/
63	/** Max GetCurrentPadding value we accept (to make sure it's safe to convert to bytes). */
64	#define VBOX_WASAPI_MAX_PADDING UINT32_C(0x007fffff)
65
66	/** Maximum number of cached device configs in each direction.
67	* The number 4 was picked at random. */
68	#define VBOX_WASAPI_MAX_TOTAL_CONFIG_ENTRIES 4
69
70	#if 0
71	/** @name WM_DRVHOSTAUDIOWAS_XXX - Worker thread messages.
72	* @{ */
73	#define WM_DRVHOSTAUDIOWAS_PURGE_CACHE (WM_APP + 3)
74	/** @} */
75	#endif
76
77
78	/** @name DRVHOSTAUDIOWAS_DO_XXX - Worker thread operations.
79	* @{ */
80	#define DRVHOSTAUDIOWAS_DO_PURGE_CACHE ((uintptr_t)0x49f37300 + 1)
81	#define DRVHOSTAUDIOWAS_DO_PRUNE_CACHE ((uintptr_t)0x49f37300 + 2)
82	#define DRVHOSTAUDIOWAS_DO_STREAM_DEV_SWITCH ((uintptr_t)0x49f37300 + 3)
83	/** @} */
84
85
86	/*********************************************************************************************************************************
87	* Structures and Typedefs *
88	*********************************************************************************************************************************/
89	class DrvHostAudioWasMmNotifyClient;
90
91	/** Pointer to the cache entry for a host audio device (+dir). */
92	typedef struct DRVHOSTAUDIOWASCACHEDEV *PDRVHOSTAUDIOWASCACHEDEV;
93
94	/**
95	* Cached pre-initialized audio client for a device.
96	*
97	* The activation and initialization of an IAudioClient has been observed to be
98	* very very slow (> 100 ms) and not suitable to be done on an EMT. So, we'll
99	* pre-initialize the device clients at construction time and when the default
100	* device changes to try avoid this problem.
101	*
102	* A client is returned to the cache after we're done with it, provided it still
103	* works fine.
104	*/
105	typedef struct DRVHOSTAUDIOWASCACHEDEVCFG
106	{
107	/** Entry in DRVHOSTAUDIOWASCACHEDEV::ConfigList. */
108	RTLISTNODE ListEntry;
109	/** The device. */
110	PDRVHOSTAUDIOWASCACHEDEV pDevEntry;
111	/** The cached audio client. */
112	IAudioClient *pIAudioClient;
113	/** Output streams: The render client interface. */
114	IAudioRenderClient *pIAudioRenderClient;
115	/** Input streams: The capture client interface. */
116	IAudioCaptureClient *pIAudioCaptureClient;
117	/** The configuration. */
118	PDMAUDIOPCMPROPS Props;
119	/** The buffer size in frames. */
120	uint32_t cFramesBufferSize;
121	/** The device/whatever period in frames. */
122	uint32_t cFramesPeriod;
123	/** The setup status code.
124	* This is set to VERR_AUDIO_STREAM_INIT_IN_PROGRESS while the asynchronous
125	* initialization is still running. */
126	int volatile rcSetup;
127	/** Creation timestamp (just for reference). */
128	uint64_t nsCreated;
129	/** Init complete timestamp (just for reference). */
130	uint64_t nsInited;
131	/** When it was last used. */
132	uint64_t nsLastUsed;
133	/** The stringified properties. */
134	char szProps[32];
135	} DRVHOSTAUDIOWASCACHEDEVCFG;
136	/** Pointer to a pre-initialized audio client. */
137	typedef DRVHOSTAUDIOWASCACHEDEVCFG *PDRVHOSTAUDIOWASCACHEDEVCFG;
138
139	/**
140	* Per audio device (+ direction) cache entry.
141	*/
142	typedef struct DRVHOSTAUDIOWASCACHEDEV
143	{
144	/** Entry in DRVHOSTAUDIOWAS::CacheHead. */
145	RTLISTNODE ListEntry;
146	/** The MM device associated with the stream. */
147	IMMDevice *pIDevice;
148	/** The direction of the device. */
149	PDMAUDIODIR enmDir;
150	#if 0 /* According to https://social.msdn.microsoft.com/Forums/en-US/1d974d90-6636-4121-bba3-a8861d9ab92a,
151	these were always support just missing from the SDK. */
152	/** Support for AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM: -1=unknown, 0=no, 1=yes. */
153	int8_t fSupportsAutoConvertPcm;
154	/** Support for AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY: -1=unknown, 0=no, 1=yes. */
155	int8_t fSupportsSrcDefaultQuality;
156	#endif
157	/** List of cached configurations (DRVHOSTAUDIOWASCACHEDEVCFG). */
158	RTLISTANCHOR ConfigList;
159	/** The device ID length in RTUTF16 units. */
160	size_t cwcDevId;
161	/** The device ID. */
162	RTUTF16 wszDevId[RT_FLEXIBLE_ARRAY];
163	} DRVHOSTAUDIOWASCACHEDEV;
164
165
166	/**
167	* Data for a WASABI stream.
168	*/
169	typedef struct DRVHOSTAUDIOWASSTREAM
170	{
171	/** Common part. */
172	PDMAUDIOBACKENDSTREAM Core;
173
174	/** Entry in DRVHOSTAUDIOWAS::StreamHead. */
175	RTLISTNODE ListEntry;
176	/** The stream's acquired configuration. */
177	PDMAUDIOSTREAMCFG Cfg;
178	/** Cache entry to be relased when destroying the stream. */
179	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg;
180
181	/** Set if the stream is enabled. */
182	bool fEnabled;
183	/** Set if the stream is started (playing/capturing). */
184	bool fStarted;
185	/** Set if the stream is draining (output only). */
186	bool fDraining;
187	/** Set if we should restart the stream on resume (saved pause state). */
188	bool fRestartOnResume;
189	/** Set if we're switching to a new output/input device. */
190	bool fSwitchingDevice;
191
192	/** The RTTimeMilliTS() deadline for the draining of this stream (output). */
193	uint64_t msDrainDeadline;
194	/** Internal stream offset (bytes). */
195	uint64_t offInternal;
196	/** The RTTimeMilliTS() at the end of the last transfer. */
197	uint64_t msLastTransfer;
198
199	/** Input: Current capture buffer (advanced as we read). */
200	uint8_t *pbCapture;
201	/** Input: The number of bytes left in the current capture buffer. */
202	uint32_t cbCapture;
203	/** Input: The full size of what pbCapture is part of (for ReleaseBuffer). */
204	uint32_t cFramesCaptureToRelease;
205
206	/** Critical section protecting: . */
207	RTCRITSECT CritSect;
208	/** Buffer that drvHostWasStreamStatusString uses. */
209	char szStatus[128];
210	} DRVHOSTAUDIOWASSTREAM;
211	/** Pointer to a WASABI stream. */
212	typedef DRVHOSTAUDIOWASSTREAM *PDRVHOSTAUDIOWASSTREAM;
213
214
215	/**
216	* WASAPI-specific device entry.
217	*/
218	typedef struct DRVHOSTAUDIOWASDEV
219	{
220	/** The core structure. */
221	PDMAUDIOHOSTDEV Core;
222	/** The device ID (flexible length). */
223	RTUTF16 wszDevId[RT_FLEXIBLE_ARRAY];
224	} DRVHOSTAUDIOWASDEV;
225	/** Pointer to a DirectSound device entry. */
226	typedef DRVHOSTAUDIOWASDEV *PDRVHOSTAUDIOWASDEV;
227
228
229	/**
230	* Data for a WASAPI host audio instance.
231	*/
232	typedef struct DRVHOSTAUDIOWAS
233	{
234	/** The audio host audio interface we export. */
235	PDMIHOSTAUDIO IHostAudio;
236	/** Pointer to the PDM driver instance. */
237	PPDMDRVINS pDrvIns;
238	/** Audio device enumerator instance that we use for getting the default
239	* devices (or specific ones if overriden by config). Also used for
240	* implementing enumeration. */
241	IMMDeviceEnumerator *pIEnumerator;
242	/** The upwards interface. */
243	PPDMIHOSTAUDIOPORT pIHostAudioPort;
244	/** The output device ID, NULL for default.
245	* Protected by DrvHostAudioWasMmNotifyClient::m_CritSect. */
246	PRTUTF16 pwszOutputDevId;
247	/** The input device ID, NULL for default.
248	* Protected by DrvHostAudioWasMmNotifyClient::m_CritSect. */
249	PRTUTF16 pwszInputDevId;
250
251	/** Pointer to the MM notification client instance. */
252	DrvHostAudioWasMmNotifyClient *pNotifyClient;
253	/** The input device to use. This can be NULL if there wasn't a suitable one
254	* around when we last looked or if it got removed/disabled/whatever.
255	* All access must be done inside the pNotifyClient critsect. */
256	IMMDevice *pIDeviceInput;
257	/** The output device to use. This can be NULL if there wasn't a suitable one
258	* around when we last looked or if it got removed/disabled/whatever.
259	* All access must be done inside the pNotifyClient critsect. */
260	IMMDevice *pIDeviceOutput;
261
262	/** List of streams (DRVHOSTAUDIOWASSTREAM).
263	* Requires CritSect ownership. */
264	RTLISTANCHOR StreamHead;
265	/** Serializing access to StreamHead. */
266	RTCRITSECTRW CritSectStreamList;
267
268	/** List of cached devices (DRVHOSTAUDIOWASCACHEDEV).
269	* Protected by CritSectCache */
270	RTLISTANCHOR CacheHead;
271	/** Serializing access to CacheHead. */
272	RTCRITSECT CritSectCache;
273	/** Semaphore for signalling that cache purge is done and that the destructor
274	* can do cleanups. */
275	RTSEMEVENTMULTI hEvtCachePurge;
276	/** Total number of device config entire for capturing.
277	* This includes in-use ones. */
278	uint32_t volatile cCacheEntriesIn;
279	/** Total number of device config entire for playback.
280	* This includes in-use ones. */
281	uint32_t volatile cCacheEntriesOut;
282
283	#if 0
284	/** The worker thread. */
285	RTTHREAD hWorkerThread;
286	/** The TID of the worker thread (for posting messages to it). */
287	DWORD idWorkerThread;
288	/** The fixed wParam value for the worker thread. */
289	WPARAM uWorkerThreadFixedParam;
290	#endif
291	} DRVHOSTAUDIOWAS;
292	/** Pointer to the data for a WASAPI host audio driver instance. */
293	typedef DRVHOSTAUDIOWAS *PDRVHOSTAUDIOWAS;
294
295
296
297
298	/**
299	* Gets the stream status.
300	*
301	* @returns Pointer to stream status string.
302	* @param pStreamWas The stream to get the status for.
303	*/
304	static const char *drvHostWasStreamStatusString(PDRVHOSTAUDIOWASSTREAM pStreamWas)
305	{
306	static RTSTRTUPLE const s_aEnable[2] =
307	{
308	{ RT_STR_TUPLE("DISABLED") },
309	{ RT_STR_TUPLE("ENABLED ") },
310	};
311	PCRTSTRTUPLE pTuple = &s_aEnable[pStreamWas->fEnabled];
312	memcpy(pStreamWas->szStatus, pTuple->psz, pTuple->cch);
313	size_t off = pTuple->cch;
314
315	static RTSTRTUPLE const s_aStarted[2] =
316	{
317	{ RT_STR_TUPLE(" STOPPED") },
318	{ RT_STR_TUPLE(" STARTED") },
319	};
320	pTuple = &s_aStarted[pStreamWas->fStarted];
321	memcpy(&pStreamWas->szStatus[off], pTuple->psz, pTuple->cch);
322	off += pTuple->cch;
323
324	static RTSTRTUPLE const s_aDraining[2] =
325	{
326	{ RT_STR_TUPLE("") },
327	{ RT_STR_TUPLE(" DRAINING") },
328	};
329	pTuple = &s_aDraining[pStreamWas->fDraining];
330	memcpy(&pStreamWas->szStatus[off], pTuple->psz, pTuple->cch);
331	off += pTuple->cch;
332
333	Assert(off < sizeof(pStreamWas->szStatus));
334	pStreamWas->szStatus[off] = '\0';
335	return pStreamWas->szStatus;
336	}
337
338
339	/*********************************************************************************************************************************
340	* IMMNotificationClient implementation
341	*********************************************************************************************************************************/
342	/**
343	* Multimedia notification client.
344	*
345	* We want to know when the default device changes so we can switch running
346	* streams to use the new one and so we can pre-activate it in preparation
347	* for new streams.
348	*/
349	class DrvHostAudioWasMmNotifyClient : public IMMNotificationClient
350	{
351	private:
352	/** Reference counter. */
353	uint32_t volatile m_cRefs;
354	/** The WASAPI host audio driver instance data.
355	* @note This can be NULL. Only access after entering critical section. */
356	PDRVHOSTAUDIOWAS m_pDrvWas;
357	/** Critical section serializing access to m_pDrvWas. */
358	RTCRITSECT m_CritSect;
359
360	public:
361	/**
362	* @throws int on critical section init failure.
363	*/
364	DrvHostAudioWasMmNotifyClient(PDRVHOSTAUDIOWAS a_pDrvWas)
365	: m_cRefs(1)
366	, m_pDrvWas(a_pDrvWas)
367	{
368	RT_ZERO(m_CritSect);
369	}
370
371	virtual ~DrvHostAudioWasMmNotifyClient() RT_NOEXCEPT
372	{
373	if (RTCritSectIsInitialized(&m_CritSect))
374	RTCritSectDelete(&m_CritSect);
375	}
376
377	/**
378	* Initializes the critical section.
379	* @note Must be buildable w/o exceptions enabled, so cannot do this from the
380	* constructor. */
381	int init(void) RT_NOEXCEPT
382	{
383	return RTCritSectInit(&m_CritSect);
384	}
385
386	/**
387	* Called by drvHostAudioWasDestruct to set m_pDrvWas to NULL.
388	*/
389	void notifyDriverDestroyed() RT_NOEXCEPT
390	{
391	RTCritSectEnter(&m_CritSect);
392	m_pDrvWas = NULL;
393	RTCritSectLeave(&m_CritSect);
394	}
395
396	/**
397	* Enters the notification critsect for getting at the IMMDevice members in
398	* PDMHOSTAUDIOWAS.
399	*/
400	void lockEnter() RT_NOEXCEPT
401	{
402	RTCritSectEnter(&m_CritSect);
403	}
404
405	/**
406	* Leaves the notification critsect.
407	*/
408	void lockLeave() RT_NOEXCEPT
409	{
410	RTCritSectLeave(&m_CritSect);
411	}
412
413	/** @name IUnknown interface
414	* @{ */
415	IFACEMETHODIMP_(ULONG) AddRef()
416	{
417	uint32_t cRefs = ASMAtomicIncU32(&m_cRefs);
418	AssertMsg(cRefs < 64, ("%#x\n", cRefs));
419	Log6Func(("returns %u\n", cRefs));
420	return cRefs;
421	}
422
423	IFACEMETHODIMP_(ULONG) Release()
424	{
425	uint32_t cRefs = ASMAtomicDecU32(&m_cRefs);
426	AssertMsg(cRefs < 64, ("%#x\n", cRefs));
427	if (cRefs == 0)
428	delete this;
429	Log6Func(("returns %u\n", cRefs));
430	return cRefs;
431	}
432
433	IFACEMETHODIMP QueryInterface(const IID &rIID, void **ppvInterface)
434	{
435	if (IsEqualIID(rIID, IID_IUnknown))
436	ppvInterface = static_cast<IUnknown >(this);
437	else if (IsEqualIID(rIID, __uuidof(IMMNotificationClient)))
438	ppvInterface = static_cast<IMMNotificationClient >(this);
439	else
440	{
441	LogFunc(("Unknown rIID={%RTuuid}\n", &rIID));
442	*ppvInterface = NULL;
443	return E_NOINTERFACE;
444	}
445	Log6Func(("returns S_OK + %p\n", *ppvInterface));
446	return S_OK;
447	}
448	/** @} */
449
450	/** @name IMMNotificationClient interface
451	* @{ */
452	IFACEMETHODIMP OnDeviceStateChanged(LPCWSTR pwszDeviceId, DWORD dwNewState)
453	{
454	RT_NOREF(pwszDeviceId, dwNewState);
455	Log7Func(("pwszDeviceId=%ls dwNewState=%u (%#x)\n", pwszDeviceId, dwNewState, dwNewState));
456
457	/*
458	* Just trigger device re-enumeration.
459	*/
460	notifyDeviceChanges();
461
462	/** @todo do we need to check for our devices here too? Not when using a
463	* default device. But when using a specific device, we could perhaps
464	* re-init the stream when dwNewState indicates precense. We might
465	* also take action when a devices ceases to be operating, but again
466	* only for non-default devices, probably... */
467
468	return S_OK;
469	}
470
471	IFACEMETHODIMP OnDeviceAdded(LPCWSTR pwszDeviceId)
472	{
473	RT_NOREF(pwszDeviceId);
474	Log7Func(("pwszDeviceId=%ls\n", pwszDeviceId));
475
476	/*
477	* Is this a device we're interested in? Grab the enumerator if it is.
478	*/
479	bool fOutput = false;
480	IMMDeviceEnumerator *pIEnumerator = NULL;
481	RTCritSectEnter(&m_CritSect);
482	if ( m_pDrvWas != NULL
483	&& ( (fOutput = RTUtf16ICmp(m_pDrvWas->pwszOutputDevId, pwszDeviceId) == 0)
484	\|\| RTUtf16ICmp(m_pDrvWas->pwszInputDevId, pwszDeviceId) == 0))
485	{
486	pIEnumerator = m_pDrvWas->pIEnumerator;
487	if (pIEnumerator /* paranoia */)
488	pIEnumerator->AddRef();
489	}
490	RTCritSectLeave(&m_CritSect);
491	if (pIEnumerator)
492	{
493	/*
494	* Get the device and update it.
495	*/
496	IMMDevice *pIDevice = NULL;
497	HRESULT hrc = pIEnumerator->GetDevice(pwszDeviceId, &pIDevice);
498	if (SUCCEEDED(hrc))
499	setDevice(fOutput, pIDevice, pwszDeviceId, __PRETTY_FUNCTION__);
500	else
501	LogRelMax(64, ("WasAPI: Failed to get %s device '%ls' (OnDeviceAdded): %Rhrc\n",
502	fOutput ? "output" : "input", pwszDeviceId, hrc));
503	pIEnumerator->Release();
504
505	/*
506	* Trigger device re-enumeration.
507	*/
508	notifyDeviceChanges();
509	}
510	return S_OK;
511	}
512
513	IFACEMETHODIMP OnDeviceRemoved(LPCWSTR pwszDeviceId)
514	{
515	RT_NOREF(pwszDeviceId);
516	Log7Func(("pwszDeviceId=%ls\n", pwszDeviceId));
517
518	/*
519	* Is this a device we're interested in? Then set it to NULL.
520	*/
521	bool fOutput = false;
522	RTCritSectEnter(&m_CritSect);
523	if ( m_pDrvWas != NULL
524	&& ( (fOutput = RTUtf16ICmp(m_pDrvWas->pwszOutputDevId, pwszDeviceId) == 0)
525	\|\| RTUtf16ICmp(m_pDrvWas->pwszInputDevId, pwszDeviceId) == 0))
526	{
527	RTCritSectLeave(&m_CritSect);
528	setDevice(fOutput, NULL, pwszDeviceId, __PRETTY_FUNCTION__);
529	}
530	else
531	RTCritSectLeave(&m_CritSect);
532
533	/*
534	* Trigger device re-enumeration.
535	*/
536	notifyDeviceChanges();
537	return S_OK;
538	}
539
540	IFACEMETHODIMP OnDefaultDeviceChanged(EDataFlow enmFlow, ERole enmRole, LPCWSTR pwszDefaultDeviceId)
541	{
542	/*
543	* Are we interested in this device? If so grab the enumerator.
544	*/
545	IMMDeviceEnumerator *pIEnumerator = NULL;
546	RTCritSectEnter(&m_CritSect);
547	if ( m_pDrvWas != NULL
548	&& ( (enmFlow == eRender && enmRole == eMultimedia && !m_pDrvWas->pwszOutputDevId)
549	\|\| (enmFlow == eCapture && enmRole == eMultimedia && !m_pDrvWas->pwszInputDevId)))
550	{
551	pIEnumerator = m_pDrvWas->pIEnumerator;
552	if (pIEnumerator /* paranoia */)
553	pIEnumerator->AddRef();
554	}
555	RTCritSectLeave(&m_CritSect);
556	if (pIEnumerator)
557	{
558	/*
559	* Get the device and update it.
560	*/
561	IMMDevice *pIDevice = NULL;
562	HRESULT hrc = pIEnumerator->GetDefaultAudioEndpoint(enmFlow, enmRole, &pIDevice);
563	if (SUCCEEDED(hrc))
564	setDevice(enmFlow == eRender, pIDevice, pwszDefaultDeviceId, __PRETTY_FUNCTION__);
565	else
566	LogRelMax(64, ("WasAPI: Failed to get default %s device (OnDefaultDeviceChange): %Rhrc\n",
567	enmFlow == eRender ? "output" : "input", hrc));
568	pIEnumerator->Release();
569
570	/*
571	* Trigger device re-enumeration.
572	*/
573	notifyDeviceChanges();
574	}
575
576	Log7Func(("enmFlow=%d enmRole=%d pwszDefaultDeviceId=%ls\n", enmFlow, enmRole, pwszDefaultDeviceId));
577	return S_OK;
578	}
579
580	IFACEMETHODIMP OnPropertyValueChanged(LPCWSTR pwszDeviceId, const PROPERTYKEY Key)
581	{
582	RT_NOREF(pwszDeviceId, Key);
583	Log7Func(("pwszDeviceId=%ls Key={%RTuuid, %u (%#x)}\n", pwszDeviceId, &Key.fmtid, Key.pid, Key.pid));
584	return S_OK;
585	}
586	/** @} */
587
588	private:
589	/**
590	* Sets DRVHOSTAUDIOWAS::pIDeviceOutput or DRVHOSTAUDIOWAS::pIDeviceInput to @a pIDevice.
591	*/
592	void setDevice(bool fOutput, IMMDevice pIDevice, LPCWSTR pwszDeviceId, const char pszCaller)
593	{
594	RT_NOREF(pszCaller, pwszDeviceId);
595
596	RTCritSectEnter(&m_CritSect);
597
598	/*
599	* Update our internal device reference.
600	*/
601	if (m_pDrvWas)
602	{
603	if (fOutput)
604	{
605	Log7((LOG_FN_FMT ": Changing output device from %p to %p (%ls)\n",
606	pszCaller, m_pDrvWas->pIDeviceOutput, pIDevice, pwszDeviceId));
607	if (m_pDrvWas->pIDeviceOutput)
608	m_pDrvWas->pIDeviceOutput->Release();
609	m_pDrvWas->pIDeviceOutput = pIDevice;
610	}
611	else
612	{
613	Log7((LOG_FN_FMT ": Changing input device from %p to %p (%ls)\n",
614	pszCaller, m_pDrvWas->pIDeviceInput, pIDevice, pwszDeviceId));
615	if (m_pDrvWas->pIDeviceInput)
616	m_pDrvWas->pIDeviceInput->Release();
617	m_pDrvWas->pIDeviceInput = pIDevice;
618	}
619	}
620	else if (pIDevice)
621	pIDevice->Release();
622
623	/*
624	* Tell DrvAudio that the device has changed for one of the directions.
625	*
626	* We have to exit the critsect when doing so, or we'll create a locking
627	* order violation. So, try make sure the VM won't be destroyed while
628	* till DrvAudio have entered its critical section...
629	*/
630	if (m_pDrvWas)
631	{
632	PPDMIHOSTAUDIOPORT const pIHostAudioPort = m_pDrvWas->pIHostAudioPort;
633	if (pIHostAudioPort)
634	{
635	VMSTATE const enmVmState = PDMDrvHlpVMState(m_pDrvWas->pDrvIns);
636	if (enmVmState < VMSTATE_POWERING_OFF)
637	{
638	RTCritSectLeave(&m_CritSect);
639	pIHostAudioPort->pfnNotifyDeviceChanged(pIHostAudioPort, fOutput ? PDMAUDIODIR_OUT : PDMAUDIODIR_IN, NULL);
640	return;
641	}
642	LogFlowFunc(("Ignoring change: enmVmState=%d\n", enmVmState));
643	}
644	}
645
646	RTCritSectLeave(&m_CritSect);
647	}
648
649	/**
650	* Tell DrvAudio to re-enumerate devices when it get a chance.
651	*
652	* We exit the critsect here too before calling DrvAudio just to be on the safe
653	* side (see setDevice()), even though the current DrvAudio code doesn't take
654	* any critsects.
655	*/
656	void notifyDeviceChanges(void)
657	{
658	RTCritSectEnter(&m_CritSect);
659	if (m_pDrvWas)
660	{
661	PPDMIHOSTAUDIOPORT const pIHostAudioPort = m_pDrvWas->pIHostAudioPort;
662	if (pIHostAudioPort)
663	{
664	VMSTATE const enmVmState = PDMDrvHlpVMState(m_pDrvWas->pDrvIns);
665	if (enmVmState < VMSTATE_POWERING_OFF)
666	{
667	RTCritSectLeave(&m_CritSect);
668	pIHostAudioPort->pfnNotifyDevicesChanged(pIHostAudioPort);
669	return;
670	}
671	LogFlowFunc(("Ignoring change: enmVmState=%d\n", enmVmState));
672	}
673	}
674	RTCritSectLeave(&m_CritSect);
675	}
676	};
677
678
679	/*********************************************************************************************************************************
680	* Pre-configured audio client cache. *
681	*********************************************************************************************************************************/
682	#define WAS_CACHE_MAX_ENTRIES_SAME_DEVICE 2
683
684	/**
685	* Converts from PDM stream config to windows WAVEFORMATEXTENSIBLE struct.
686	*
687	* @param pProps The PDM audio PCM properties to convert from.
688	* @param pFmt The windows structure to initialize.
689	*/
690	static void drvHostAudioWasWaveFmtExtFromProps(PCPDMAUDIOPCMPROPS pProps, PWAVEFORMATEXTENSIBLE pFmt)
691	{
692	RT_ZERO(*pFmt);
693	pFmt->Format.wFormatTag = WAVE_FORMAT_PCM;
694	pFmt->Format.nChannels = PDMAudioPropsChannels(pProps);
695	pFmt->Format.wBitsPerSample = PDMAudioPropsSampleBits(pProps);
696	pFmt->Format.nSamplesPerSec = PDMAudioPropsHz(pProps);
697	pFmt->Format.nBlockAlign = PDMAudioPropsFrameSize(pProps);
698	pFmt->Format.nAvgBytesPerSec = PDMAudioPropsFramesToBytes(pProps, PDMAudioPropsHz(pProps));
699	pFmt->Format.cbSize = 0; /* No extra data specified. */
700
701	/*
702	* We need to use the extensible structure if there are more than two channels
703	* or if the channels have non-standard assignments.
704	*/
705	if ( pFmt->Format.nChannels > 2
706	\|\| ( pFmt->Format.nChannels == 1
707	? pProps->aidChannels[0] != PDMAUDIOCHANNELID_MONO
708	: pProps->aidChannels[0] != PDMAUDIOCHANNELID_FRONT_LEFT
709	\|\| pProps->aidChannels[1] != PDMAUDIOCHANNELID_FRONT_RIGHT))
710	{
711	pFmt->Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
712	pFmt->Format.cbSize = sizeof(*pFmt) - sizeof(pFmt->Format);
713	pFmt->Samples.wValidBitsPerSample = PDMAudioPropsSampleBits(pProps);
714	pFmt->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
715	pFmt->dwChannelMask = 0;
716	unsigned const cSrcChannels = pFmt->Format.nChannels;
717	for (unsigned i = 0; i < cSrcChannels; i++)
718	if ( pProps->aidChannels[i] >= PDMAUDIOCHANNELID_FIRST_STANDARD
719	&& pProps->aidChannels[i] < PDMAUDIOCHANNELID_END_STANDARD)
720	pFmt->dwChannelMask \|= RT_BIT_32(pProps->aidChannels[i] - PDMAUDIOCHANNELID_FIRST_STANDARD);
721	else
722	pFmt->Format.nChannels -= 1;
723	}
724	}
725
726
727	#if 0 /* unused */
728	/**
729	* Converts from windows WAVEFORMATEX and stream props to PDM audio properties.
730	*
731	* @returns VINF_SUCCESS on success, VERR_AUDIO_STREAM_COULD_NOT_CREATE if not
732	* supported.
733	* @param pProps The output properties structure.
734	* @param pFmt The windows wave format structure.
735	* @param pszStream The stream name for error logging.
736	* @param pwszDevId The device ID for error logging.
737	*/
738	static int drvHostAudioWasCacheWaveFmtExToProps(PPDMAUDIOPCMPROPS pProps, WAVEFORMATEX const *pFmt,
739	const char *pszStream, PCRTUTF16 pwszDevId)
740	{
741	if (pFmt->wFormatTag == WAVE_FORMAT_PCM)
742	{
743	if ( pFmt->wBitsPerSample == 8
744	\|\| pFmt->wBitsPerSample == 16
745	\|\| pFmt->wBitsPerSample == 32)
746	{
747	if (pFmt->nChannels > 0 && pFmt->nChannels < 16)
748	{
749	if (pFmt->nSamplesPerSec >= 4096 && pFmt->nSamplesPerSec <= 768000)
750	{
751	PDMAudioPropsInit(pProps, pFmt->wBitsPerSample / 8, true /fSigned/, pFmt->nChannels, pFmt->nSamplesPerSec);
752	if (PDMAudioPropsFrameSize(pProps) == pFmt->nBlockAlign)
753	return VINF_SUCCESS;
754	}
755	}
756	}
757	}
758	LogRelMax(64, ("WasAPI: Error! Unsupported stream format for '%s' suggested by '%ls':\n"
759	"WasAPI: wFormatTag = %RU16 (expected %d)\n"
760	"WasAPI: nChannels = %RU16 (expected 1..15)\n"
761	"WasAPI: nSamplesPerSec = %RU32 (expected 4096..768000)\n"
762	"WasAPI: nAvgBytesPerSec = %RU32\n"
763	"WasAPI: nBlockAlign = %RU16\n"
764	"WasAPI: wBitsPerSample = %RU16 (expected 8, 16, or 32)\n"
765	"WasAPI: cbSize = %RU16\n",
766	pszStream, pwszDevId, pFmt->wFormatTag, WAVE_FORMAT_PCM, pFmt->nChannels, pFmt->nSamplesPerSec, pFmt->nAvgBytesPerSec,
767	pFmt->nBlockAlign, pFmt->wBitsPerSample, pFmt->cbSize));
768	return VERR_AUDIO_STREAM_COULD_NOT_CREATE;
769	}
770	#endif
771
772
773	/**
774	* Destroys a devie config cache entry.
775	*
776	* @param pThis The WASAPI host audio driver instance data.
777	* @param pDevCfg Device config entry. Must not be in the list.
778	*/
779	static void drvHostAudioWasCacheDestroyDevConfig(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg)
780	{
781	if (pDevCfg->pDevEntry->enmDir == PDMAUDIODIR_IN)
782	ASMAtomicDecU32(&pThis->cCacheEntriesIn);
783	else
784	ASMAtomicDecU32(&pThis->cCacheEntriesOut);
785
786	uint32_t cTypeClientRefs = 0;
787	if (pDevCfg->pIAudioCaptureClient)
788	{
789	cTypeClientRefs = pDevCfg->pIAudioCaptureClient->Release();
790	pDevCfg->pIAudioCaptureClient = NULL;
791	}
792
793	if (pDevCfg->pIAudioRenderClient)
794	{
795	cTypeClientRefs = pDevCfg->pIAudioRenderClient->Release();
796	pDevCfg->pIAudioRenderClient = NULL;
797	}
798
799	uint32_t cClientRefs = 0;
800	if (pDevCfg->pIAudioClient /* paranoia */)
801	{
802	cClientRefs = pDevCfg->pIAudioClient->Release();
803	pDevCfg->pIAudioClient = NULL;
804	}
805
806	Log8Func(("Destroying cache config entry: '%ls: %s' - cClientRefs=%u cTypeClientRefs=%u\n",
807	pDevCfg->pDevEntry->wszDevId, pDevCfg->szProps, cClientRefs, cTypeClientRefs));
808	RT_NOREF(cClientRefs, cTypeClientRefs);
809
810	pDevCfg->pDevEntry = NULL;
811	RTMemFree(pDevCfg);
812	}
813
814	/**
815	* Invalidates device cache entry configurations.
816	*
817	* @param pThis The WASAPI host audio driver instance data.
818	* @param pDevEntry The device entry to invalidate.
819	*/
820	static void drvHostAudioWasCacheInvalidateDevEntryConfig(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASCACHEDEV pDevEntry)
821	{
822	RT_NOREF(pThis);
823
824	Log8Func(("Invalidating cache entry configurations: %p - '%ls'\n", pDevEntry, pDevEntry->wszDevId));
825
826	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg, pDevCfgNext;
827	RTListForEachSafe(&pDevEntry->ConfigList, pDevCfg, pDevCfgNext, DRVHOSTAUDIOWASCACHEDEVCFG, ListEntry)
828	pDevCfg->pIAudioClient = NULL;
829	}
830
831	/**
832	* Destroys a device cache entry.
833	*
834	* @param pThis The WASAPI host audio driver instance data.
835	* @param pDevEntry The device entry. Must not be in the cache!
836	*/
837	static void drvHostAudioWasCacheDestroyDevEntry(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASCACHEDEV pDevEntry)
838	{
839	Log8Func(("Destroying cache entry: %p - '%ls'\n", pDevEntry, pDevEntry->wszDevId));
840
841	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg, pDevCfgNext;
842	RTListForEachSafe(&pDevEntry->ConfigList, pDevCfg, pDevCfgNext, DRVHOSTAUDIOWASCACHEDEVCFG, ListEntry)
843	{
844	drvHostAudioWasCacheDestroyDevConfig(pThis, pDevCfg);
845	}
846
847	uint32_t cDevRefs = 0;
848	if (pDevEntry->pIDevice /* paranoia */)
849	{
850	cDevRefs = pDevEntry->pIDevice->Release();
851	pDevEntry->pIDevice = NULL;
852	}
853
854	pDevEntry->cwcDevId = 0;
855	pDevEntry->wszDevId[0] = '\0';
856	RTMemFree(pDevEntry);
857	Log8Func(("Destroyed cache entry: %p cDevRefs=%u\n", pDevEntry, cDevRefs));
858	}
859
860
861	/**
862	* Prunes the cache.
863	*/
864	static void drvHostAudioWasCachePrune(PDRVHOSTAUDIOWAS pThis)
865	{
866	/*
867	* Prune each direction separately.
868	*/
869	struct
870	{
871	PDMAUDIODIR enmDir;
872	uint32_t volatile *pcEntries;
873	} aWork[] = { { PDMAUDIODIR_IN, &pThis->cCacheEntriesIn }, { PDMAUDIODIR_OUT, &pThis->cCacheEntriesOut }, };
874	for (uint32_t iWork = 0; iWork < RT_ELEMENTS(aWork); iWork++)
875	{
876	/*
877	* Remove the least recently used entry till we're below the threshold
878	* or there are no more inactive entries.
879	*/
880	LogFlowFunc(("iWork=%u cEntries=%u\n", iWork, *aWork[iWork].pcEntries));
881	while (*aWork[iWork].pcEntries > VBOX_WASAPI_MAX_TOTAL_CONFIG_ENTRIES)
882	{
883	RTCritSectEnter(&pThis->CritSectCache);
884	PDRVHOSTAUDIOWASCACHEDEVCFG pLeastRecentlyUsed = NULL;
885	PDRVHOSTAUDIOWASCACHEDEV pDevEntry;
886	RTListForEach(&pThis->CacheHead, pDevEntry, DRVHOSTAUDIOWASCACHEDEV, ListEntry)
887	{
888	if (pDevEntry->enmDir == aWork[iWork].enmDir)
889	{
890	PDRVHOSTAUDIOWASCACHEDEVCFG pHeadCfg = RTListGetFirst(&pDevEntry->ConfigList,
891	DRVHOSTAUDIOWASCACHEDEVCFG, ListEntry);
892	if ( pHeadCfg
893	&& (!pLeastRecentlyUsed \|\| pHeadCfg->nsLastUsed < pLeastRecentlyUsed->nsLastUsed))
894	pLeastRecentlyUsed = pHeadCfg;
895	}
896	}
897	if (pLeastRecentlyUsed)
898	RTListNodeRemove(&pLeastRecentlyUsed->ListEntry);
899	RTCritSectLeave(&pThis->CritSectCache);
900
901	if (!pLeastRecentlyUsed)
902	break;
903	drvHostAudioWasCacheDestroyDevConfig(pThis, pLeastRecentlyUsed);
904	}
905	}
906	}
907
908
909	/**
910	* Purges all the entries in the cache.
911	*/
912	static void drvHostAudioWasCachePurge(PDRVHOSTAUDIOWAS pThis, bool fOnWorker)
913	{
914	for (;;)
915	{
916	RTCritSectEnter(&pThis->CritSectCache);
917	PDRVHOSTAUDIOWASCACHEDEV pDevEntry = RTListRemoveFirst(&pThis->CacheHead, DRVHOSTAUDIOWASCACHEDEV, ListEntry);
918	RTCritSectLeave(&pThis->CritSectCache);
919	if (!pDevEntry)
920	break;
921	drvHostAudioWasCacheDestroyDevEntry(pThis, pDevEntry);
922	}
923
924	if (fOnWorker)
925	{
926	int rc = RTSemEventMultiSignal(pThis->hEvtCachePurge);
927	AssertRC(rc);
928	}
929	}
930
931
932	/**
933	* Looks up a specific configuration.
934	*
935	* @returns Pointer to the device config (removed from cache) on success. NULL
936	* if no matching config found.
937	* @param pDevEntry Where to perform the lookup.
938	* @param pProps The config properties to match.
939	*/
940	static PDRVHOSTAUDIOWASCACHEDEVCFG
941	drvHostAudioWasCacheLookupLocked(PDRVHOSTAUDIOWASCACHEDEV pDevEntry, PCPDMAUDIOPCMPROPS pProps)
942	{
943	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg;
944	RTListForEach(&pDevEntry->ConfigList, pDevCfg, DRVHOSTAUDIOWASCACHEDEVCFG, ListEntry)
945	{
946	if (PDMAudioPropsAreEqual(&pDevCfg->Props, pProps))
947	{
948	RTListNodeRemove(&pDevCfg->ListEntry);
949	pDevCfg->nsLastUsed = RTTimeNanoTS();
950	return pDevCfg;
951	}
952	}
953	return NULL;
954	}
955
956
957	/**
958	* Initializes a device config entry.
959	*
960	* This is usually done on the worker thread.
961	*
962	* @returns VBox status code.
963	* @param pDevCfg The device configuration entry to initialize.
964	*/
965	static int drvHostAudioWasCacheInitConfig(PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg)
966	{
967	/*
968	* Assert some sanity given that we migth be called on the worker thread
969	* and pDevCfg being a message parameter.
970	*/
971	AssertPtrReturn(pDevCfg, VERR_INTERNAL_ERROR_2);
972	AssertReturn(pDevCfg->rcSetup == VERR_AUDIO_STREAM_INIT_IN_PROGRESS, VERR_INTERNAL_ERROR_2);
973	AssertReturn(pDevCfg->pIAudioClient == NULL, VERR_INTERNAL_ERROR_2);
974	AssertReturn(pDevCfg->pIAudioCaptureClient == NULL, VERR_INTERNAL_ERROR_2);
975	AssertReturn(pDevCfg->pIAudioRenderClient == NULL, VERR_INTERNAL_ERROR_2);
976	AssertReturn(PDMAudioPropsAreValid(&pDevCfg->Props), VERR_INTERNAL_ERROR_2);
977
978	PDRVHOSTAUDIOWASCACHEDEV pDevEntry = pDevCfg->pDevEntry;
979	AssertPtrReturn(pDevEntry, VERR_INTERNAL_ERROR_2);
980	AssertPtrReturn(pDevEntry->pIDevice, VERR_INTERNAL_ERROR_2);
981	AssertReturn(pDevEntry->enmDir == PDMAUDIODIR_IN \|\| pDevEntry->enmDir == PDMAUDIODIR_OUT, VERR_INTERNAL_ERROR_2);
982
983	/*
984	* First we need an IAudioClient interface for calling IsFormatSupported
985	* on so we can get guidance as to what to do next.
986	*
987	* Initially, I thought the AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM was not
988	* supported all the way back to Vista and that we'd had to try different
989	* things here to get the most optimal format. However, according to
990	* https://social.msdn.microsoft.com/Forums/en-US/1d974d90-6636-4121-bba3-a8861d9ab92a
991	* it is supported, just maybe missing from the SDK or something...
992	*
993	* I'll leave the IsFormatSupported call here as it gives us a clue as to
994	* what exactly the WAS needs to convert our audio stream into/from.
995	*/
996	Log8Func(("Activating an IAudioClient for '%ls' ...\n", pDevEntry->wszDevId));
997	IAudioClient *pIAudioClient = NULL;
998	HRESULT hrc = pDevEntry->pIDevice->Activate(__uuidof(IAudioClient), CLSCTX_ALL,
999	NULL /pActivationParams/, (void **)&pIAudioClient);
1000	Log8Func(("Activate('%ls', IAudioClient) -> %Rhrc\n", pDevEntry->wszDevId, hrc));
1001	if (FAILED(hrc))
1002	{
1003	LogRelMax(64, ("WasAPI: Activate(%ls, IAudioClient) failed: %Rhrc\n", pDevEntry->wszDevId, hrc));
1004	pDevCfg->nsInited = RTTimeNanoTS();
1005	pDevCfg->nsLastUsed = pDevCfg->nsInited;
1006	return pDevCfg->rcSetup = VERR_AUDIO_STREAM_COULD_NOT_CREATE;
1007	}
1008
1009	WAVEFORMATEXTENSIBLE WaveFmtExt;
1010	drvHostAudioWasWaveFmtExtFromProps(&pDevCfg->Props, &WaveFmtExt);
1011
1012	PWAVEFORMATEX pClosestMatch = NULL;
1013	hrc = pIAudioClient->IsFormatSupported(AUDCLNT_SHAREMODE_SHARED, &WaveFmtExt.Format, &pClosestMatch);
1014
1015	/*
1016	* If the format is supported, go ahead and initialize the client instance.
1017	*
1018	* The docs talks about AUDCLNT_E_UNSUPPORTED_FORMAT being success too, but
1019	* that doesn't seem to be the case (at least not for mixing up the
1020	* WAVEFORMATEX::wFormatTag values). Seems that is the standard return code
1021	* if there is anything it doesn't grok.
1022	*/
1023	if (SUCCEEDED(hrc))
1024	{
1025	if (hrc == S_OK)
1026	Log8Func(("IsFormatSupported(,%s,) -> S_OK + %p: requested format is supported\n", pDevCfg->szProps, pClosestMatch));
1027	else
1028	Log8Func(("IsFormatSupported(,%s,) -> %Rhrc + %p: %uch S%u %uHz\n", pDevCfg->szProps, hrc, pClosestMatch,
1029	pClosestMatch ? pClosestMatch->nChannels : 0, pClosestMatch ? pClosestMatch->wBitsPerSample : 0,
1030	pClosestMatch ? pClosestMatch->nSamplesPerSec : 0));
1031
1032	REFERENCE_TIME const cBufferSizeInNtTicks = PDMAudioPropsFramesToNtTicks(&pDevCfg->Props, pDevCfg->cFramesBufferSize);
1033	uint32_t fInitFlags = AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM
1034	\| AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY;
1035	hrc = pIAudioClient->Initialize(AUDCLNT_SHAREMODE_SHARED, fInitFlags, cBufferSizeInNtTicks,
1036	0 /cPeriodicityInNtTicks/, &WaveFmtExt.Format, NULL /pAudioSessionGuid/);
1037	Log8Func(("Initialize(,%x, %RI64, %s,) -> %Rhrc\n", fInitFlags, cBufferSizeInNtTicks, pDevCfg->szProps, hrc));
1038	if (SUCCEEDED(hrc))
1039	{
1040	/*
1041	* The direction specific client interface.
1042	*/
1043	if (pDevEntry->enmDir == PDMAUDIODIR_IN)
1044	hrc = pIAudioClient->GetService(__uuidof(IAudioCaptureClient), (void **)&pDevCfg->pIAudioCaptureClient);
1045	else
1046	hrc = pIAudioClient->GetService(__uuidof(IAudioRenderClient), (void **)&pDevCfg->pIAudioRenderClient);
1047	Log8Func(("GetService -> %Rhrc + %p\n", hrc, pDevEntry->enmDir == PDMAUDIODIR_IN
1048	? (void )pDevCfg->pIAudioCaptureClient : (void )pDevCfg->pIAudioRenderClient));
1049	if (SUCCEEDED(hrc))
1050	{
1051	/*
1052	* Obtain the actual stream format and buffer config.
1053	*/
1054	UINT32 cFramesBufferSize = 0;
1055	REFERENCE_TIME cDefaultPeriodInNtTicks = 0;
1056	REFERENCE_TIME cMinimumPeriodInNtTicks = 0;
1057	REFERENCE_TIME cLatencyinNtTicks = 0;
1058	hrc = pIAudioClient->GetBufferSize(&cFramesBufferSize);
1059	if (SUCCEEDED(hrc))
1060	{
1061	hrc = pIAudioClient->GetDevicePeriod(&cDefaultPeriodInNtTicks, &cMinimumPeriodInNtTicks);
1062	if (SUCCEEDED(hrc))
1063	{
1064	hrc = pIAudioClient->GetStreamLatency(&cLatencyinNtTicks);
1065	if (SUCCEEDED(hrc))
1066	{
1067	LogRel2(("WasAPI: Aquired buffer parameters for %s:\n"
1068	"WasAPI: cFramesBufferSize = %RU32\n"
1069	"WasAPI: cDefaultPeriodInNtTicks = %RI64\n"
1070	"WasAPI: cMinimumPeriodInNtTicks = %RI64\n"
1071	"WasAPI: cLatencyinNtTicks = %RI64\n",
1072	pDevCfg->szProps, cFramesBufferSize, cDefaultPeriodInNtTicks,
1073	cMinimumPeriodInNtTicks, cLatencyinNtTicks));
1074
1075	pDevCfg->pIAudioClient = pIAudioClient;
1076	pDevCfg->cFramesBufferSize = cFramesBufferSize;
1077	pDevCfg->cFramesPeriod = PDMAudioPropsNanoToFrames(&pDevCfg->Props,
1078	cDefaultPeriodInNtTicks * 100);
1079	pDevCfg->nsInited = RTTimeNanoTS();
1080	pDevCfg->nsLastUsed = pDevCfg->nsInited;
1081	pDevCfg->rcSetup = VINF_SUCCESS;
1082
1083	if (pClosestMatch)
1084	CoTaskMemFree(pClosestMatch);
1085	Log8Func(("returns VINF_SUCCESS (%p (%s) inited in %'RU64 ns)\n",
1086	pDevCfg, pDevCfg->szProps, pDevCfg->nsInited - pDevCfg->nsCreated));
1087	return VINF_SUCCESS;
1088	}
1089	LogRelMax(64, ("WasAPI: GetStreamLatency failed: %Rhrc\n", hrc));
1090	}
1091	else
1092	LogRelMax(64, ("WasAPI: GetDevicePeriod failed: %Rhrc\n", hrc));
1093	}
1094	else
1095	LogRelMax(64, ("WasAPI: GetBufferSize failed: %Rhrc\n", hrc));
1096
1097	if (pDevCfg->pIAudioCaptureClient)
1098	{
1099	pDevCfg->pIAudioCaptureClient->Release();
1100	pDevCfg->pIAudioCaptureClient = NULL;
1101	}
1102
1103	if (pDevCfg->pIAudioRenderClient)
1104	{
1105	pDevCfg->pIAudioRenderClient->Release();
1106	pDevCfg->pIAudioRenderClient = NULL;
1107	}
1108	}
1109	else
1110	LogRelMax(64, ("WasAPI: IAudioClient::GetService(%s) failed: %Rhrc\n", pDevCfg->szProps, hrc));
1111	}
1112	else
1113	LogRelMax(64, ("WasAPI: IAudioClient::Initialize(%s) failed: %Rhrc\n", pDevCfg->szProps, hrc));
1114	}
1115	else
1116	LogRelMax(64,("WasAPI: IAudioClient::IsFormatSupported(,%s,) failed: %Rhrc\n", pDevCfg->szProps, hrc));
1117
1118	pIAudioClient->Release();
1119	if (pClosestMatch)
1120	CoTaskMemFree(pClosestMatch);
1121	pDevCfg->nsInited = RTTimeNanoTS();
1122	pDevCfg->nsLastUsed = 0;
1123	Log8Func(("returns VERR_AUDIO_STREAM_COULD_NOT_CREATE (inited in %'RU64 ns)\n", pDevCfg->nsInited - pDevCfg->nsCreated));
1124	return pDevCfg->rcSetup = VERR_AUDIO_STREAM_COULD_NOT_CREATE;
1125	}
1126
1127
1128	/**
1129	* Worker for drvHostAudioWasCacheLookupOrCreate.
1130	*
1131	* If lookup fails, a new entry will be created.
1132	*
1133	* @note Called holding the lock, returning without holding it!
1134	*/
1135	static int drvHostAudioWasCacheLookupOrCreateConfig(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASCACHEDEV pDevEntry,
1136	PCPDMAUDIOSTREAMCFG pCfgReq, bool fOnWorker,
1137	PDRVHOSTAUDIOWASCACHEDEVCFG *ppDevCfg)
1138	{
1139	/*
1140	* Check if we've got a matching config.
1141	*/
1142	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg = drvHostAudioWasCacheLookupLocked(pDevEntry, &pCfgReq->Props);
1143	if (pDevCfg)
1144	{
1145	*ppDevCfg = pDevCfg;
1146	RTCritSectLeave(&pThis->CritSectCache);
1147	Log8Func(("Config cache hit '%s' on '%ls': %p\n", pDevCfg->szProps, pDevEntry->wszDevId, pDevCfg));
1148	return VINF_SUCCESS;
1149	}
1150
1151	RTCritSectLeave(&pThis->CritSectCache);
1152
1153	/*
1154	* Allocate an device config entry and hand the creation task over to the
1155	* worker thread, unless we're already on it.
1156	*/
1157	pDevCfg = (PDRVHOSTAUDIOWASCACHEDEVCFG)RTMemAllocZ(sizeof(*pDevCfg));
1158	AssertReturn(pDevCfg, VERR_NO_MEMORY);
1159	RTListInit(&pDevCfg->ListEntry);
1160	pDevCfg->pDevEntry = pDevEntry;
1161	pDevCfg->rcSetup = VERR_AUDIO_STREAM_INIT_IN_PROGRESS;
1162	pDevCfg->Props = pCfgReq->Props;
1163	pDevCfg->cFramesBufferSize = pCfgReq->Backend.cFramesBufferSize;
1164	PDMAudioPropsToString(&pDevCfg->Props, pDevCfg->szProps, sizeof(pDevCfg->szProps));
1165	pDevCfg->nsCreated = RTTimeNanoTS();
1166	pDevCfg->nsLastUsed = pDevCfg->nsCreated;
1167
1168	uint32_t cCacheEntries;
1169	if (pDevCfg->pDevEntry->enmDir == PDMAUDIODIR_IN)
1170	cCacheEntries = ASMAtomicIncU32(&pThis->cCacheEntriesIn);
1171	else
1172	cCacheEntries = ASMAtomicIncU32(&pThis->cCacheEntriesOut);
1173	if (cCacheEntries > VBOX_WASAPI_MAX_TOTAL_CONFIG_ENTRIES)
1174	{
1175	LogFlowFunc(("Trigger cache pruning.\n"));
1176	int rc2 = pThis->pIHostAudioPort->pfnDoOnWorkerThread(pThis->pIHostAudioPort, NULL /pStream/,
1177	DRVHOSTAUDIOWAS_DO_PRUNE_CACHE, NULL /pvUser/);
1178	AssertRCStmt(rc2, drvHostAudioWasCachePrune(pThis));
1179	}
1180
1181	if (!fOnWorker)
1182	{
1183	*ppDevCfg = pDevCfg;
1184	LogFlowFunc(("Doing the rest of the work on %p via pfnStreamInitAsync...\n", pDevCfg));
1185	return VINF_AUDIO_STREAM_ASYNC_INIT_NEEDED;
1186	}
1187
1188	/*
1189	* Initialize the entry on the calling thread.
1190	*/
1191	int rc = drvHostAudioWasCacheInitConfig(pDevCfg);
1192	AssertRC(pDevCfg->rcSetup == rc);
1193	if (RT_SUCCESS(rc))
1194	rc = pDevCfg->rcSetup; /* paranoia */
1195	if (RT_SUCCESS(rc))
1196	{
1197	*ppDevCfg = pDevCfg;
1198	LogFlowFunc(("Returning %p\n", pDevCfg));
1199	return VINF_SUCCESS;
1200	}
1201	RTMemFree(pDevCfg);
1202	*ppDevCfg = NULL;
1203	return rc;
1204	}
1205
1206
1207	/**
1208	* Looks up the given device + config combo in the cache, creating a new entry
1209	* if missing.
1210	*
1211	* @returns VBox status code.
1212	* @retval VINF_AUDIO_STREAM_ASYNC_INIT_NEEDED if @a fOnWorker is @c false and
1213	* we created a new entry that needs initalization by calling
1214	* drvHostAudioWasCacheInitConfig() on it.
1215	* @param pThis The WASAPI host audio driver instance data.
1216	* @param pIDevice The device to look up.
1217	* @param pCfgReq The configuration to look up.
1218	* @param fOnWorker Set if we're on a worker thread, otherwise false. When
1219	* set to @c true, VINF_AUDIO_STREAM_ASYNC_INIT_NEEDED will
1220	* not be returned and a new entry will be fully
1221	* initialized before returning.
1222	* @param ppDevCfg Where to return the requested device config.
1223	*/
1224	static int drvHostAudioWasCacheLookupOrCreate(PDRVHOSTAUDIOWAS pThis, IMMDevice *pIDevice, PCPDMAUDIOSTREAMCFG pCfgReq,
1225	bool fOnWorker, PDRVHOSTAUDIOWASCACHEDEVCFG *ppDevCfg)
1226	{
1227	*ppDevCfg = NULL;
1228
1229	/*
1230	* Get the device ID so we can perform the lookup.
1231	*/
1232	int rc = VERR_AUDIO_STREAM_COULD_NOT_CREATE;
1233	LPWSTR pwszDevId = NULL;
1234	HRESULT hrc = pIDevice->GetId(&pwszDevId);
1235	if (SUCCEEDED(hrc))
1236	{
1237	LogRel2(("WasAPI: Checking for cached device '%ls' ...\n", pwszDevId));
1238
1239	size_t cwcDevId = RTUtf16Len(pwszDevId);
1240
1241	/*
1242	* The cache has two levels, so first the device entry.
1243	*/
1244	PDRVHOSTAUDIOWASCACHEDEV pDevEntry, pDevEntryNext;
1245	RTCritSectEnter(&pThis->CritSectCache);
1246	RTListForEachSafe(&pThis->CacheHead, pDevEntry, pDevEntryNext, DRVHOSTAUDIOWASCACHEDEV, ListEntry)
1247	{
1248	if ( pDevEntry->cwcDevId == cwcDevId
1249	&& pDevEntry->enmDir == pCfgReq->enmDir
1250	&& RTUtf16Cmp(pDevEntry->wszDevId, pwszDevId) == 0)
1251	{
1252	/*
1253	* Cache hit -- here we now need to also check if the device interface we want to look up
1254	* actually matches the one we have in the cache entry.
1255	*
1256	* If it doesn't, invalidate + remove the cache entry from the cache and bail out.
1257	* Add a new device entry to the cache with the new interface below then.
1258	*
1259	* This is needed when switching audio interfaces and the device interface becomes invalid via
1260	* AUDCLNT_E_DEVICE_INVALIDATED. See @bugref{10503}
1261	*/
1262	if (pIDevice != pDevEntry->pIDevice)
1263	{
1264	Log2Func(("Cache hit for device '%ls': Stale interface (new: %p, old: %p)\n",
1265	pDevEntry->wszDevId, pIDevice, pDevEntry->pIDevice));
1266
1267	LogRel(("WasAPI: Stale audio interface '%ls' detected! Invalidating audio interface ...\n",
1268	pDevEntry->wszDevId));
1269
1270	drvHostAudioWasCacheInvalidateDevEntryConfig(pThis, pDevEntry);
1271	RTListNodeRemove(&pDevEntry->ListEntry);
1272	drvHostAudioWasCacheDestroyDevEntry(pThis, pDevEntry);
1273	pDevEntry = NULL;
1274	break;
1275	}
1276
1277	CoTaskMemFree(pwszDevId);
1278	Log8Func(("Cache hit for device '%ls': %p\n", pDevEntry->wszDevId, pDevEntry));
1279	return drvHostAudioWasCacheLookupOrCreateConfig(pThis, pDevEntry, pCfgReq, fOnWorker, ppDevCfg);
1280	}
1281	}
1282	RTCritSectLeave(&pThis->CritSectCache);
1283
1284	if (pDevEntry)
1285	Log8Func(("Cache miss for device '%ls': %p\n", pDevEntry->wszDevId, pDevEntry));
1286
1287	/*
1288	* Device not in the cache, add it.
1289	*/
1290	pDevEntry = (PDRVHOSTAUDIOWASCACHEDEV)RTMemAllocZVar(RT_UOFFSETOF_DYN(DRVHOSTAUDIOWASCACHEDEV, wszDevId[cwcDevId + 1]));
1291	if (pDevEntry)
1292	{
1293	pIDevice->AddRef();
1294	pDevEntry->pIDevice = pIDevice;
1295	pDevEntry->enmDir = pCfgReq->enmDir;
1296	pDevEntry->cwcDevId = cwcDevId;
1297	#if 0
1298	pDevEntry->fSupportsAutoConvertPcm = -1;
1299	pDevEntry->fSupportsSrcDefaultQuality = -1;
1300	#endif
1301	RTListInit(&pDevEntry->ConfigList);
1302	memcpy(pDevEntry->wszDevId, pwszDevId, cwcDevId * sizeof(RTUTF16));
1303	pDevEntry->wszDevId[cwcDevId] = '\0';
1304
1305	CoTaskMemFree(pwszDevId);
1306	pwszDevId = NULL;
1307
1308	/*
1309	* Before adding the device, check that someone didn't race us adding it.
1310	*/
1311	RTCritSectEnter(&pThis->CritSectCache);
1312	PDRVHOSTAUDIOWASCACHEDEV pDevEntry2;
1313	RTListForEach(&pThis->CacheHead, pDevEntry2, DRVHOSTAUDIOWASCACHEDEV, ListEntry)
1314	{
1315	if ( pDevEntry2->cwcDevId == cwcDevId
1316	&& pDevEntry2->enmDir == pCfgReq->enmDir
1317	&& RTUtf16Cmp(pDevEntry2->wszDevId, pDevEntry->wszDevId) == 0)
1318	{
1319	pIDevice->Release();
1320	RTMemFree(pDevEntry);
1321	pDevEntry = NULL;
1322
1323	Log8Func(("Lost race adding device '%ls': %p\n", pDevEntry2->wszDevId, pDevEntry2));
1324	return drvHostAudioWasCacheLookupOrCreateConfig(pThis, pDevEntry2, pCfgReq, fOnWorker, ppDevCfg);
1325	}
1326	}
1327	RTListPrepend(&pThis->CacheHead, &pDevEntry->ListEntry);
1328
1329	Log8Func(("Added device '%ls' to cache: %p\n", pDevEntry->wszDevId, pDevEntry));
1330	return drvHostAudioWasCacheLookupOrCreateConfig(pThis, pDevEntry, pCfgReq, fOnWorker, ppDevCfg);
1331	}
1332	CoTaskMemFree(pwszDevId);
1333	}
1334	else
1335	LogRelMax(64, ("WasAPI: GetId failed (lookup): %Rhrc\n", hrc));
1336	return rc;
1337	}
1338
1339
1340	/**
1341	* Return the given config to the cache.
1342	*
1343	* @param pThis The WASAPI host audio driver instance data.
1344	* @param pDevCfg The device config to put back.
1345	*/
1346	static void drvHostAudioWasCachePutBack(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg)
1347	{
1348	/*
1349	* Reset the audio client to see that it works and to make sure it's in a sensible state.
1350	*/
1351	HRESULT hrc = pDevCfg->pIAudioClient ? pDevCfg->pIAudioClient->Reset()
1352	: pDevCfg->rcSetup == VERR_AUDIO_STREAM_INIT_IN_PROGRESS ? S_OK : E_FAIL;
1353	if (SUCCEEDED(hrc))
1354	{
1355	Log8Func(("Putting %p/'%s' back\n", pDevCfg, pDevCfg->szProps));
1356	RTCritSectEnter(&pThis->CritSectCache);
1357	RTListAppend(&pDevCfg->pDevEntry->ConfigList, &pDevCfg->ListEntry);
1358	uint32_t const cEntries = pDevCfg->pDevEntry->enmDir == PDMAUDIODIR_IN ? pThis->cCacheEntriesIn : pThis->cCacheEntriesOut;
1359	RTCritSectLeave(&pThis->CritSectCache);
1360
1361	/* Trigger pruning if we're over the threshold. */
1362	if (cEntries > VBOX_WASAPI_MAX_TOTAL_CONFIG_ENTRIES)
1363	{
1364	LogFlowFunc(("Trigger cache pruning.\n"));
1365	int rc2 = pThis->pIHostAudioPort->pfnDoOnWorkerThread(pThis->pIHostAudioPort, NULL /pStream/,
1366	DRVHOSTAUDIOWAS_DO_PRUNE_CACHE, NULL /pvUser/);
1367	AssertRCStmt(rc2, drvHostAudioWasCachePrune(pThis));
1368	}
1369	}
1370	else
1371	{
1372	Log8Func(("IAudioClient::Reset failed (%Rhrc) on %p/'%s', destroying it.\n", hrc, pDevCfg, pDevCfg->szProps));
1373	drvHostAudioWasCacheDestroyDevConfig(pThis, pDevCfg);
1374	}
1375	}
1376
1377
1378	static void drvHostWasCacheConfigHinting(PDRVHOSTAUDIOWAS pThis, PPDMAUDIOSTREAMCFG pCfgReq, bool fOnWorker)
1379	{
1380	/*
1381	* Get the device.
1382	*/
1383	pThis->pNotifyClient->lockEnter();
1384	IMMDevice *pIDevice = pCfgReq->enmDir == PDMAUDIODIR_IN ? pThis->pIDeviceInput : pThis->pIDeviceOutput;
1385	if (pIDevice)
1386	pIDevice->AddRef();
1387	pThis->pNotifyClient->lockLeave();
1388	if (pIDevice)
1389	{
1390	/*
1391	* Look up the config and put it back.
1392	*/
1393	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg = NULL;
1394	int rc = drvHostAudioWasCacheLookupOrCreate(pThis, pIDevice, pCfgReq, fOnWorker, &pDevCfg);
1395	LogFlowFunc(("pDevCfg=%p rc=%Rrc\n", pDevCfg, rc));
1396	if (pDevCfg && RT_SUCCESS(rc))
1397	drvHostAudioWasCachePutBack(pThis, pDevCfg);
1398	pIDevice->Release();
1399	}
1400	}
1401
1402
1403	/**
1404	* Prefills the cache.
1405	*
1406	* @param pThis The WASAPI host audio driver instance data.
1407	*/
1408	static void drvHostAudioWasCacheFill(PDRVHOSTAUDIOWAS pThis)
1409	{
1410	#if 0 /* we don't have the buffer config nor do we really know which frequences to expect */
1411	Log8Func(("enter\n"));
1412	struct
1413	{
1414	PCRTUTF16 pwszDevId;
1415	PDMAUDIODIR enmDir;
1416	} aToCache[] =
1417	{
1418	{ pThis->pwszInputDevId, PDMAUDIODIR_IN },
1419	{ pThis->pwszOutputDevId, PDMAUDIODIR_OUT }
1420	};
1421	for (unsigned i = 0; i < RT_ELEMENTS(aToCache); i++)
1422	{
1423	PCRTUTF16 pwszDevId = aToCache[i].pwszDevId;
1424	IMMDevice *pIDevice = NULL;
1425	HRESULT hrc;
1426	if (pwszDevId)
1427	hrc = pThis->pIEnumerator->GetDevice(pwszDevId, &pIDevice);
1428	else
1429	{
1430	hrc = pThis->pIEnumerator->GetDefaultAudioEndpoint(aToCache[i].enmDir == PDMAUDIODIR_IN ? eCapture : eRender,
1431	eMultimedia, &pIDevice);
1432	pwszDevId = aToCache[i].enmDir == PDMAUDIODIR_IN ? L"{Default-In}" : L"{Default-Out}";
1433	}
1434	if (SUCCEEDED(hrc))
1435	{
1436	PDMAUDIOSTREAMCFG Cfg = { aToCache[i].enmDir, { PDMAUDIOPLAYBACKDST_INVALID },
1437	PDMAUDIOPCMPROPS_INITIALIZER(2, true, 2, 44100, false) };
1438	Cfg.Backend.cFramesBufferSize = PDMAudioPropsMilliToFrames(&Cfg.Props, 300);
1439	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg = drvHostAudioWasCacheLookupOrCreate(pThis, pIDevice, &Cfg);
1440	if (pDevCfg)
1441	drvHostAudioWasCachePutBack(pThis, pDevCfg);
1442
1443	pIDevice->Release();
1444	}
1445	else
1446	LogRelMax(64, ("WasAPI: Failed to open audio device '%ls' (pre-caching): %Rhrc\n", pwszDevId, hrc));
1447	}
1448	Log8Func(("leave\n"));
1449	#else
1450	RT_NOREF(pThis);
1451	#endif
1452	}
1453
1454
1455	/*********************************************************************************************************************************
1456	* Worker thread *
1457	*********************************************************************************************************************************/
1458	#if 0
1459
1460	/**
1461	* @callback_method_impl{FNRTTHREAD,
1462	* Asynchronous thread for setting up audio client configs.}
1463	*/
1464	static DECLCALLBACK(int) drvHostWasWorkerThread(RTTHREAD hThreadSelf, void *pvUser)
1465	{
1466	PDRVHOSTAUDIOWAS pThis = (PDRVHOSTAUDIOWAS)pvUser;
1467
1468	/*
1469	* We need to set the thread ID so others can post us thread messages.
1470	* And before we signal that we're ready, make sure we've got a message queue.
1471	*/
1472	pThis->idWorkerThread = GetCurrentThreadId();
1473	LogFunc(("idWorkerThread=%#x (%u)\n", pThis->idWorkerThread, pThis->idWorkerThread));
1474
1475	MSG Msg;
1476	PeekMessageW(&Msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
1477
1478	int rc = RTThreadUserSignal(hThreadSelf);
1479	AssertRC(rc);
1480
1481	/*
1482	* Message loop.
1483	*/
1484	BOOL fRet;
1485	while ((fRet = GetMessageW(&Msg, NULL, 0, 0)) != FALSE)
1486	{
1487	if (fRet != -1)
1488	{
1489	TranslateMessage(&Msg);
1490	Log9Func(("Msg: time=%u: msg=%#x l=%p w=%p for hwnd=%p\n", Msg.time, Msg.message, Msg.lParam, Msg.wParam, Msg.hwnd));
1491	switch (Msg.message)
1492	{
1493	case WM_DRVHOSTAUDIOWAS_PURGE_CACHE:
1494	{
1495	AssertMsgBreak(Msg.wParam == pThis->uWorkerThreadFixedParam, ("%p\n", Msg.wParam));
1496	AssertBreak(Msg.hwnd == NULL);
1497	AssertBreak(Msg.lParam == 0);
1498
1499	drvHostAudioWasCachePurge(pThis, false /fOnWorker/);
1500	break;
1501	}
1502
1503	default:
1504	break;
1505	}
1506	DispatchMessageW(&Msg);
1507	}
1508	else
1509	AssertMsgFailed(("GetLastError()=%u\n", GetLastError()));
1510	}
1511
1512	LogFlowFunc(("Pre-quit cache purge...\n"));
1513	drvHostAudioWasCachePurge(pThis, false /fOnWorker/);
1514
1515	LogFunc(("Quits\n"));
1516	return VINF_SUCCESS;
1517	}
1518	#endif
1519
1520
1521	/*********************************************************************************************************************************
1522	* PDMIHOSTAUDIO *
1523	*********************************************************************************************************************************/
1524
1525	/**
1526	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetConfig}
1527	*/
1528	static DECLCALLBACK(int) drvHostAudioWasHA_GetConfig(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDCFG pBackendCfg)
1529	{
1530	RT_NOREF(pInterface);
1531	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
1532	AssertPtrReturn(pBackendCfg, VERR_INVALID_POINTER);
1533
1534
1535	/*
1536	* Fill in the config structure.
1537	*/
1538	RTStrCopy(pBackendCfg->szName, sizeof(pBackendCfg->szName), "WasAPI");
1539	pBackendCfg->cbStream = sizeof(DRVHOSTAUDIOWASSTREAM);
1540	pBackendCfg->fFlags = PDMAUDIOBACKEND_F_ASYNC_HINT;
1541	pBackendCfg->cMaxStreamsIn = UINT32_MAX;
1542	pBackendCfg->cMaxStreamsOut = UINT32_MAX;
1543
1544	return VINF_SUCCESS;
1545	}
1546
1547
1548	/**
1549	* Queries information for @a pDevice and adds an entry to the enumeration.
1550	*
1551	* @returns VBox status code.
1552	* @param pDevEnm The enumeration to add the device to.
1553	* @param pIDevice The device.
1554	* @param enmType The type of device.
1555	* @param fDefault Whether it's the default device.
1556	*/
1557	static int drvHostWasEnumAddDev(PPDMAUDIOHOSTENUM pDevEnm, IMMDevice *pIDevice, EDataFlow enmType, bool fDefault)
1558	{
1559	int rc = VINF_SUCCESS; /* ignore most errors */
1560	RT_NOREF(fDefault); /** @todo default device marking/skipping. */
1561
1562	/*
1563	* Gather the necessary properties.
1564	*/
1565	IPropertyStore *pProperties = NULL;
1566	HRESULT hrc = pIDevice->OpenPropertyStore(STGM_READ, &pProperties);
1567	if (SUCCEEDED(hrc))
1568	{
1569	/* Get the friendly name (string). */
1570	PROPVARIANT VarName;
1571	PropVariantInit(&VarName);
1572	hrc = pProperties->GetValue(PKEY_Device_FriendlyName, &VarName);
1573	if (SUCCEEDED(hrc))
1574	{
1575	/* Get the device ID (string). */
1576	LPWSTR pwszDevId = NULL;
1577	hrc = pIDevice->GetId(&pwszDevId);
1578	if (SUCCEEDED(hrc))
1579	{
1580	size_t const cwcDevId = RTUtf16Len(pwszDevId);
1581
1582	/* Get the device format (blob). */
1583	PROPVARIANT VarFormat;
1584	PropVariantInit(&VarFormat);
1585	hrc = pProperties->GetValue(PKEY_AudioEngine_DeviceFormat, &VarFormat);
1586	if (SUCCEEDED(hrc))
1587	{
1588	WAVEFORMATEX const * const pFormat = (WAVEFORMATEX const *)VarFormat.blob.pBlobData;
1589	AssertPtr(pFormat); /* Observed sometimes being NULL on windows 7 sp1. */
1590
1591	/*
1592	* Create a enumeration entry for it.
1593	*/
1594	size_t const cbId = RTUtf16CalcUtf8Len(pwszDevId) + 1;
1595	size_t const cbName = RTUtf16CalcUtf8Len(VarName.pwszVal) + 1;
1596	size_t const cbDev = RT_ALIGN_Z( RT_OFFSETOF(DRVHOSTAUDIOWASDEV, wszDevId)
1597	+ (cwcDevId + 1) * sizeof(RTUTF16),
1598	64);
1599	PDRVHOSTAUDIOWASDEV pDev = (PDRVHOSTAUDIOWASDEV)PDMAudioHostDevAlloc(cbDev, cbName, cbId);
1600	if (pDev)
1601	{
1602	pDev->Core.enmType = PDMAUDIODEVICETYPE_BUILTIN;
1603	pDev->Core.enmUsage = enmType == eRender ? PDMAUDIODIR_OUT : PDMAUDIODIR_IN;
1604	if (fDefault)
1605	pDev->Core.fFlags = enmType == eRender ? PDMAUDIOHOSTDEV_F_DEFAULT_OUT : PDMAUDIOHOSTDEV_F_DEFAULT_IN;
1606	if (enmType == eRender)
1607	pDev->Core.cMaxOutputChannels = RT_VALID_PTR(pFormat) ? pFormat->nChannels : 2;
1608	else
1609	pDev->Core.cMaxInputChannels = RT_VALID_PTR(pFormat) ? pFormat->nChannels : 1;
1610
1611	memcpy(pDev->wszDevId, pwszDevId, cwcDevId * sizeof(RTUTF16));
1612	pDev->wszDevId[cwcDevId] = '\0';
1613
1614	Assert(pDev->Core.pszName);
1615	rc = RTUtf16ToUtf8Ex(VarName.pwszVal, RTSTR_MAX, &pDev->Core.pszName, cbName, NULL);
1616	if (RT_SUCCESS(rc))
1617	{
1618	Assert(pDev->Core.pszId);
1619	rc = RTUtf16ToUtf8Ex(pDev->wszDevId, RTSTR_MAX, &pDev->Core.pszId, cbId, NULL);
1620	if (RT_SUCCESS(rc))
1621	PDMAudioHostEnumAppend(pDevEnm, &pDev->Core);
1622	else
1623	PDMAudioHostDevFree(&pDev->Core);
1624	}
1625	else
1626	PDMAudioHostDevFree(&pDev->Core);
1627	}
1628	else
1629	rc = VERR_NO_MEMORY;
1630	PropVariantClear(&VarFormat);
1631	}
1632	else
1633	LogFunc(("Failed to get PKEY_AudioEngine_DeviceFormat: %Rhrc\n", hrc));
1634	CoTaskMemFree(pwszDevId);
1635	}
1636	else
1637	LogFunc(("Failed to get the device ID: %Rhrc\n", hrc));
1638	PropVariantClear(&VarName);
1639	}
1640	else
1641	LogFunc(("Failed to get PKEY_Device_FriendlyName: %Rhrc\n", hrc));
1642	pProperties->Release();
1643	}
1644	else
1645	LogFunc(("OpenPropertyStore failed: %Rhrc\n", hrc));
1646
1647	if (hrc == E_OUTOFMEMORY && RT_SUCCESS_NP(rc))
1648	rc = VERR_NO_MEMORY;
1649	return rc;
1650	}
1651
1652
1653	/**
1654	* Does a (Re-)enumeration of the host's playback + capturing devices.
1655	*
1656	* @return VBox status code.
1657	* @param pThis The WASAPI host audio driver instance data.
1658	* @param pDevEnm Where to store the enumerated devices.
1659	*/
1660	static int drvHostWasEnumerateDevices(PDRVHOSTAUDIOWAS pThis, PPDMAUDIOHOSTENUM pDevEnm)
1661	{
1662	LogRel2(("WasAPI: Enumerating devices ...\n"));
1663
1664	int rc = VINF_SUCCESS;
1665	for (unsigned idxPass = 0; idxPass < 2 && RT_SUCCESS(rc); idxPass++)
1666	{
1667	EDataFlow const enmType = idxPass == 0 ? EDataFlow::eRender : EDataFlow::eCapture;
1668
1669	/* Get the default device first. */
1670	IMMDevice *pIDefaultDevice = NULL;
1671	HRESULT hrc = pThis->pIEnumerator->GetDefaultAudioEndpoint(enmType, eMultimedia, &pIDefaultDevice);
1672	if (SUCCEEDED(hrc))
1673	rc = drvHostWasEnumAddDev(pDevEnm, pIDefaultDevice, enmType, true);
1674	else
1675	pIDefaultDevice = NULL;
1676
1677	/* Enumerate the devices. */
1678	IMMDeviceCollection *pCollection = NULL;
1679	hrc = pThis->pIEnumerator->EnumAudioEndpoints(enmType, DEVICE_STATE_ACTIVE /\| DEVICE_STATE_UNPLUGGED?/, &pCollection);
1680	if (SUCCEEDED(hrc) && pCollection != NULL)
1681	{
1682	UINT cDevices = 0;
1683	hrc = pCollection->GetCount(&cDevices);
1684	if (SUCCEEDED(hrc))
1685	{
1686	for (UINT idxDevice = 0; idxDevice < cDevices && RT_SUCCESS(rc); idxDevice++)
1687	{
1688	IMMDevice *pIDevice = NULL;
1689	hrc = pCollection->Item(idxDevice, &pIDevice);
1690	if (SUCCEEDED(hrc) && pIDevice)
1691	{
1692	if (pIDevice != pIDefaultDevice)
1693	rc = drvHostWasEnumAddDev(pDevEnm, pIDevice, enmType, false);
1694	pIDevice->Release();
1695	}
1696	}
1697	}
1698	pCollection->Release();
1699	}
1700	else
1701	LogRelMax(10, ("EnumAudioEndpoints(%s) failed: %Rhrc\n", idxPass == 0 ? "output" : "input", hrc));
1702
1703	if (pIDefaultDevice)
1704	pIDefaultDevice->Release();
1705	}
1706
1707	LogRel2(("WasAPI: Enumerating devices done - %u device (%Rrc)\n", pDevEnm->cDevices, rc));
1708	return rc;
1709	}
1710
1711
1712	/**
1713	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetDevices}
1714	*/
1715	static DECLCALLBACK(int) drvHostAudioWasHA_GetDevices(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHOSTENUM pDeviceEnum)
1716	{
1717	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
1718	AssertPtrReturn(pDeviceEnum, VERR_INVALID_POINTER);
1719
1720	PDMAudioHostEnumInit(pDeviceEnum);
1721	int rc = drvHostWasEnumerateDevices(pThis, pDeviceEnum);
1722	if (RT_FAILURE(rc))
1723	PDMAudioHostEnumDelete(pDeviceEnum);
1724
1725	LogFlowFunc(("Returning %Rrc\n", rc));
1726	return rc;
1727	}
1728
1729
1730	/**
1731	* Worker for drvHostAudioWasHA_SetDevice.
1732	*/
1733	static int drvHostAudioWasSetDeviceWorker(PDRVHOSTAUDIOWAS pThis, const char pszId, PRTUTF16 ppwszDevId, IMMDevice **ppIDevice,
1734	EDataFlow enmFlow, PDMAUDIODIR enmDir, const char *pszWhat)
1735	{
1736	pThis->pNotifyClient->lockEnter();
1737
1738	/*
1739	* Did anything actually change?
1740	*/
1741	if ( (pszId == NULL) != (*ppwszDevId == NULL)
1742	\|\| ( pszId
1743	&& RTUtf16ICmpUtf8(*ppwszDevId, pszId) != 0))
1744	{
1745	/*
1746	* Duplicate the ID.
1747	*/
1748	PRTUTF16 pwszDevId = NULL;
1749	if (pszId)
1750	{
1751	int rc = RTStrToUtf16(pszId, &pwszDevId);
1752	AssertRCReturnStmt(rc, pThis->pNotifyClient->lockLeave(), rc);
1753	}
1754
1755	/*
1756	* Try get the device.
1757	*/
1758	IMMDevice *pIDevice = NULL;
1759	HRESULT hrc;
1760	if (pwszDevId)
1761	hrc = pThis->pIEnumerator->GetDevice(pwszDevId, &pIDevice);
1762	else
1763	hrc = pThis->pIEnumerator->GetDefaultAudioEndpoint(enmFlow, eMultimedia, &pIDevice);
1764	LogFlowFunc(("Got device %p (%Rhrc)\n", pIDevice, hrc));
1765	if (FAILED(hrc))
1766	{
1767	LogRel(("WasAPI: Failed to get IMMDevice for %s audio device '%s' (SetDevice): %Rhrc\n",
1768	pszWhat, pszId ? pszId : "{default}", hrc));
1769	pIDevice = NULL;
1770	}
1771
1772	/*
1773	* Make the switch.
1774	*/
1775	LogRel(("PulseAudio: Changing %s device: '%ls' -> '%s'\n",
1776	pszWhat, ppwszDevId ? ppwszDevId : L"{Default}", pszId ? pszId : "{Default}"));
1777
1778	if (*ppIDevice)
1779	(*ppIDevice)->Release();
1780	*ppIDevice = pIDevice;
1781
1782	RTUtf16Free(*ppwszDevId);
1783	*ppwszDevId = pwszDevId;
1784
1785	/*
1786	* Only notify the driver above us.
1787	*/
1788	PPDMIHOSTAUDIOPORT const pIHostAudioPort = pThis->pIHostAudioPort;
1789	pThis->pNotifyClient->lockLeave();
1790
1791	if (pIHostAudioPort)
1792	{
1793	LogFlowFunc(("Notifying parent driver about %s device change...\n", pszWhat));
1794	pIHostAudioPort->pfnNotifyDeviceChanged(pIHostAudioPort, enmDir, NULL);
1795	}
1796	}
1797	else
1798	{
1799	pThis->pNotifyClient->lockLeave();
1800	LogFunc(("No %s device change\n", pszWhat));
1801	}
1802
1803	return VINF_SUCCESS;
1804	}
1805
1806
1807	/**
1808	* @interface_method_impl{PDMIHOSTAUDIO,pfnSetDevice}
1809	*/
1810	static DECLCALLBACK(int) drvHostAudioWasHA_SetDevice(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir, const char *pszId)
1811	{
1812	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
1813
1814	/*
1815	* Validate and normalize input.
1816	*/
1817	AssertReturn(enmDir == PDMAUDIODIR_IN \|\| enmDir == PDMAUDIODIR_OUT \|\| enmDir == PDMAUDIODIR_DUPLEX, VERR_INVALID_PARAMETER);
1818	AssertPtrNullReturn(pszId, VERR_INVALID_POINTER);
1819	if (!pszId \|\| !*pszId)
1820	pszId = NULL;
1821	else
1822	AssertReturn(strlen(pszId) < 1024, VERR_INVALID_NAME);
1823	LogFunc(("enmDir=%d pszId=%s\n", enmDir, pszId));
1824
1825	/*
1826	* Do the updating.
1827	*/
1828	if (enmDir == PDMAUDIODIR_IN \|\| enmDir == PDMAUDIODIR_DUPLEX)
1829	{
1830	int rc = drvHostAudioWasSetDeviceWorker(pThis, pszId, &pThis->pwszInputDevId, &pThis->pIDeviceInput,
1831	eCapture, PDMAUDIODIR_IN, "input");
1832	AssertRCReturn(rc, rc);
1833	}
1834
1835	if (enmDir == PDMAUDIODIR_OUT \|\| enmDir == PDMAUDIODIR_DUPLEX)
1836	{
1837	int rc = drvHostAudioWasSetDeviceWorker(pThis, pszId, &pThis->pwszOutputDevId, &pThis->pIDeviceOutput,
1838	eRender, PDMAUDIODIR_OUT, "output");
1839	AssertRCReturn(rc, rc);
1840	}
1841
1842	return VINF_SUCCESS;
1843	}
1844
1845
1846	/**
1847	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetStatus}
1848	*/
1849	static DECLCALLBACK(PDMAUDIOBACKENDSTS) drvHostAudioWasHA_GetStatus(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir)
1850	{
1851	RT_NOREF(pInterface, enmDir);
1852	return PDMAUDIOBACKENDSTS_RUNNING;
1853	}
1854
1855
1856	/**
1857	* Performs the actual switching of device config.
1858	*
1859	* Worker for drvHostAudioWasDoStreamDevSwitch() and
1860	* drvHostAudioWasHA_StreamNotifyDeviceChanged().
1861	*/
1862	static void drvHostAudioWasCompleteStreamDevSwitch(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASSTREAM pStreamWas,
1863	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg)
1864	{
1865	RTCritSectEnter(&pStreamWas->CritSect);
1866
1867	/* Do the switch. */
1868	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfgOld = pStreamWas->pDevCfg;
1869	pStreamWas->pDevCfg = pDevCfg;
1870
1871	/* The new stream is neither started nor draining. */
1872	pStreamWas->fStarted = false;
1873	pStreamWas->fDraining = false;
1874
1875	/* Device switching is done now. */
1876	pStreamWas->fSwitchingDevice = false;
1877
1878	/* Stop the old stream or Reset() will fail when putting it back into the cache. */
1879	if (pStreamWas->fEnabled && pDevCfgOld->pIAudioClient)
1880	pDevCfgOld->pIAudioClient->Stop();
1881
1882	RTCritSectLeave(&pStreamWas->CritSect);
1883
1884	/* Notify DrvAudio. */
1885	pThis->pIHostAudioPort->pfnStreamNotifyDeviceChanged(pThis->pIHostAudioPort, &pStreamWas->Core, false /fReInit/);
1886
1887	/* Put the old config back into the cache. */
1888	drvHostAudioWasCachePutBack(pThis, pDevCfgOld);
1889
1890	LogFlowFunc(("returns with '%s' state: %s\n", pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas) ));
1891	}
1892
1893
1894	/**
1895	* Called on a worker thread to initialize a new device config and switch the
1896	* given stream to using it.
1897	*
1898	* @sa drvHostAudioWasHA_StreamNotifyDeviceChanged
1899	*/
1900	static void drvHostAudioWasDoStreamDevSwitch(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASSTREAM pStreamWas,
1901	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg)
1902	{
1903	/*
1904	* Do the initializing.
1905	*/
1906	int rc = drvHostAudioWasCacheInitConfig(pDevCfg);
1907	if (RT_SUCCESS(rc))
1908	drvHostAudioWasCompleteStreamDevSwitch(pThis, pStreamWas, pDevCfg);
1909	else
1910	{
1911	LogRelMax(64, ("WasAPI: Failed to set up new device config '%ls:%s' for stream '%s': %Rrc\n",
1912	pDevCfg->pDevEntry->wszDevId, pDevCfg->szProps, pStreamWas->Cfg.szName, rc));
1913	drvHostAudioWasCacheDestroyDevConfig(pThis, pDevCfg);
1914	pThis->pIHostAudioPort->pfnStreamNotifyDeviceChanged(pThis->pIHostAudioPort, &pStreamWas->Core, true /fReInit/);
1915	}
1916	}
1917
1918
1919	/**
1920	* @interface_method_impl{PDMIHOSTAUDIO,pfnDoOnWorkerThread}
1921	*/
1922	static DECLCALLBACK(void) drvHostAudioWasHA_DoOnWorkerThread(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
1923	uintptr_t uUser, void *pvUser)
1924	{
1925	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
1926	LogFlowFunc(("uUser=%#zx pStream=%p pvUser=%p\n", uUser, pStream, pvUser));
1927
1928	switch (uUser)
1929	{
1930	case DRVHOSTAUDIOWAS_DO_PURGE_CACHE:
1931	Assert(pStream == NULL);
1932	Assert(pvUser == NULL);
1933	drvHostAudioWasCachePurge(pThis, true /fOnWorker/);
1934	break;
1935
1936	case DRVHOSTAUDIOWAS_DO_PRUNE_CACHE:
1937	Assert(pStream == NULL);
1938	Assert(pvUser == NULL);
1939	drvHostAudioWasCachePrune(pThis);
1940	break;
1941
1942	case DRVHOSTAUDIOWAS_DO_STREAM_DEV_SWITCH:
1943	AssertPtr(pStream);
1944	AssertPtr(pvUser);
1945	drvHostAudioWasDoStreamDevSwitch(pThis, (PDRVHOSTAUDIOWASSTREAM)pStream, (PDRVHOSTAUDIOWASCACHEDEVCFG)pvUser);
1946	break;
1947
1948	default:
1949	AssertMsgFailedBreak(("%#zx\n", uUser));
1950	}
1951	}
1952
1953
1954	/**
1955	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamConfigHint}
1956	*
1957	* @note This is called on a DrvAudio worker thread.
1958	*/
1959	static DECLCALLBACK(void) drvHostAudioWasHA_StreamConfigHint(PPDMIHOSTAUDIO pInterface, PPDMAUDIOSTREAMCFG pCfg)
1960	{
1961	#if 0 /* disable to test async stream creation. */
1962	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
1963	LogFlowFunc(("pCfg=%p\n", pCfg));
1964
1965	drvHostWasCacheConfigHinting(pThis, pCfg);
1966	#else
1967	RT_NOREF(pInterface, pCfg);
1968	#endif
1969	}
1970
1971
1972	/**
1973	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCreate}
1974	*/
1975	static DECLCALLBACK(int) drvHostAudioWasHA_StreamCreate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
1976	PCPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
1977	{
1978	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
1979	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
1980	AssertPtrReturn(pStreamWas, VERR_INVALID_POINTER);
1981	AssertPtrReturn(pCfgReq, VERR_INVALID_POINTER);
1982	AssertPtrReturn(pCfgAcq, VERR_INVALID_POINTER);
1983	AssertReturn(pCfgReq->enmDir == PDMAUDIODIR_IN \|\| pCfgReq->enmDir == PDMAUDIODIR_OUT, VERR_INVALID_PARAMETER);
1984	Assert(PDMAudioStrmCfgEquals(pCfgReq, pCfgAcq));
1985
1986	const char * const pszStreamType = pCfgReq->enmDir == PDMAUDIODIR_IN ? "capture" : "playback"; RT_NOREF(pszStreamType);
1987	LogFlowFunc(("enmPath=%s '%s'\n", PDMAudioPathGetName(pCfgReq->enmPath), pCfgReq->szName));
1988	#if defined(RTLOG_REL_ENABLED) \|\| defined(LOG_ENABLED)
1989	char szTmp[64];
1990	#endif
1991	LogRel2(("WasAPI: Opening %s stream '%s' (%s)\n", pCfgReq->szName, pszStreamType,
1992	PDMAudioPropsToString(&pCfgReq->Props, szTmp, sizeof(szTmp))));
1993
1994	RTListInit(&pStreamWas->ListEntry);
1995
1996	/*
1997	* Do configuration conversion.
1998	*/
1999	WAVEFORMATEXTENSIBLE WaveFmtExt;
2000	drvHostAudioWasWaveFmtExtFromProps(&pCfgReq->Props, &WaveFmtExt);
2001	LogRel2(("WasAPI: Requested %s format for '%s':\n"
2002	"WasAPI: wFormatTag = %#RX16\n"
2003	"WasAPI: nChannels = %RU16\n"
2004	"WasAPI: nSamplesPerSec = %RU32\n"
2005	"WasAPI: nAvgBytesPerSec = %RU32\n"
2006	"WasAPI: nBlockAlign = %RU16\n"
2007	"WasAPI: wBitsPerSample = %RU16\n"
2008	"WasAPI: cbSize = %RU16\n"
2009	"WasAPI: cBufferSizeInNtTicks = %RU64\n",
2010	pszStreamType, pCfgReq->szName, WaveFmtExt.Format.wFormatTag, WaveFmtExt.Format.nChannels,
2011	WaveFmtExt.Format.nSamplesPerSec, WaveFmtExt.Format.nAvgBytesPerSec, WaveFmtExt.Format.nBlockAlign,
2012	WaveFmtExt.Format.wBitsPerSample, WaveFmtExt.Format.cbSize,
2013	PDMAudioPropsFramesToNtTicks(&pCfgReq->Props, pCfgReq->Backend.cFramesBufferSize) ));
2014	if (WaveFmtExt.Format.cbSize != 0)
2015	LogRel2(("WasAPI: dwChannelMask = %#RX32\n"
2016	"WasAPI: wValidBitsPerSample = %RU16\n",
2017	WaveFmtExt.dwChannelMask, WaveFmtExt.Samples.wValidBitsPerSample));
2018
2019	/* Set up the acquired format here as channel count + layout may have
2020	changed and need to be communicated to caller and used in cache lookup. */
2021	pCfgAcq = pCfgReq;
2022	if (WaveFmtExt.Format.cbSize != 0)
2023	{
2024	PDMAudioPropsSetChannels(&pCfgAcq->Props, WaveFmtExt.Format.nChannels);
2025	uint8_t idCh = 0;
2026	for (unsigned iBit = 0; iBit < 32 && idCh < WaveFmtExt.Format.nChannels; iBit++)
2027	if (WaveFmtExt.dwChannelMask & RT_BIT_32(iBit))
2028	{
2029	pCfgAcq->Props.aidChannels[idCh] = (unsigned)PDMAUDIOCHANNELID_FIRST_STANDARD + iBit;
2030	idCh++;
2031	}
2032	Assert(idCh == WaveFmtExt.Format.nChannels);
2033	}
2034
2035	/*
2036	* Get the device we're supposed to use.
2037	* (We cache this as it takes ~2ms to get the default device on a random W10 19042 system.)
2038	*/
2039	pThis->pNotifyClient->lockEnter();
2040	IMMDevice *pIDevice = pCfgReq->enmDir == PDMAUDIODIR_IN ? pThis->pIDeviceInput : pThis->pIDeviceOutput;
2041	if (pIDevice)
2042	pIDevice->AddRef();
2043	pThis->pNotifyClient->lockLeave();
2044
2045	PCRTUTF16 pwszDevId = pCfgReq->enmDir == PDMAUDIODIR_IN ? pThis->pwszInputDevId : pThis->pwszOutputDevId;
2046	PCRTUTF16 const pwszDevIdDesc = pwszDevId ? pwszDevId : pCfgReq->enmDir == PDMAUDIODIR_IN ? L"{Default-In}" : L"{Default-Out}";
2047	if (!pIDevice)
2048	{
2049	/* This might not strictly be necessary anymore, however it shouldn't
2050	hurt and may be useful when using specific devices. */
2051	HRESULT hrc;
2052	if (pwszDevId)
2053	hrc = pThis->pIEnumerator->GetDevice(pwszDevId, &pIDevice);
2054	else
2055	hrc = pThis->pIEnumerator->GetDefaultAudioEndpoint(pCfgReq->enmDir == PDMAUDIODIR_IN ? eCapture : eRender,
2056	eMultimedia, &pIDevice);
2057	LogFlowFunc(("Got device %p (%Rhrc)\n", pIDevice, hrc));
2058	if (FAILED(hrc))
2059	{
2060	LogRelMax(64, ("WasAPI: Failed to open audio %s device '%ls': %Rhrc\n", pszStreamType, pwszDevIdDesc, hrc));
2061	return VERR_AUDIO_STREAM_COULD_NOT_CREATE;
2062	}
2063	}
2064
2065	/*
2066	* Ask the cache to retrieve or instantiate the requested configuration.
2067	*/
2068	/** @todo make it return a status code too and retry if the default device
2069	* was invalidated/changed while we where working on it here. */
2070	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg = NULL;
2071	int rc = drvHostAudioWasCacheLookupOrCreate(pThis, pIDevice, pCfgAcq, false /fOnWorker/, &pDevCfg);
2072
2073	pIDevice->Release();
2074	pIDevice = NULL;
2075
2076	if (pDevCfg && RT_SUCCESS(rc))
2077	{
2078	pStreamWas->pDevCfg = pDevCfg;
2079
2080	pCfgAcq->Props = pDevCfg->Props;
2081	pCfgAcq->Backend.cFramesBufferSize = pDevCfg->cFramesBufferSize;
2082	pCfgAcq->Backend.cFramesPeriod = pDevCfg->cFramesPeriod;
2083	pCfgAcq->Backend.cFramesPreBuffering = pCfgReq->Backend.cFramesPreBuffering * pDevCfg->cFramesBufferSize
2084	/ RT_MAX(pCfgReq->Backend.cFramesBufferSize, 1);
2085
2086	PDMAudioStrmCfgCopy(&pStreamWas->Cfg, pCfgAcq);
2087
2088	/* Finally, the critical section. */
2089	int rc2 = RTCritSectInit(&pStreamWas->CritSect);
2090	if (RT_SUCCESS(rc2))
2091	{
2092	RTCritSectRwEnterExcl(&pThis->CritSectStreamList);
2093	RTListAppend(&pThis->StreamHead, &pStreamWas->ListEntry);
2094	RTCritSectRwLeaveExcl(&pThis->CritSectStreamList);
2095
2096	if (pStreamWas->pDevCfg->pIAudioClient != NULL)
2097	{
2098	LogFlowFunc(("returns VINF_SUCCESS\n", rc));
2099	return VINF_SUCCESS;
2100	}
2101	LogFlowFunc(("returns VINF_AUDIO_STREAM_ASYNC_INIT_NEEDED\n", rc));
2102	return VINF_AUDIO_STREAM_ASYNC_INIT_NEEDED;
2103	}
2104
2105	LogRelMax(64, ("WasAPI: Failed to create critical section for stream.\n"));
2106	drvHostAudioWasCachePutBack(pThis, pDevCfg);
2107	pStreamWas->pDevCfg = NULL;
2108	}
2109	else
2110	LogRelMax(64, ("WasAPI: Failed to setup %s on audio device '%ls' (%Rrc).\n", pszStreamType, pwszDevIdDesc, rc));
2111
2112	LogFlowFunc(("returns %Rrc\n", rc));
2113	return rc;
2114	}
2115
2116
2117	/**
2118	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamInitAsync}
2119	*/
2120	static DECLCALLBACK(int) drvHostAudioWasHA_StreamInitAsync(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
2121	bool fDestroyed)
2122	{
2123	RT_NOREF(pInterface);
2124	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2125	AssertPtrReturn(pStreamWas, VERR_INVALID_POINTER);
2126	LogFlowFunc(("Stream '%s'%s\n", pStreamWas->Cfg.szName, fDestroyed ? " - destroyed!" : ""));
2127
2128	/*
2129	* Assert sane preconditions for this call.
2130	*/
2131	AssertPtrReturn(pStreamWas->Core.pStream, VERR_INTERNAL_ERROR);
2132	AssertPtrReturn(pStreamWas->pDevCfg, VERR_INTERNAL_ERROR_2);
2133	AssertPtrReturn(pStreamWas->pDevCfg->pDevEntry, VERR_INTERNAL_ERROR_3);
2134	AssertPtrReturn(pStreamWas->pDevCfg->pDevEntry->pIDevice, VERR_INTERNAL_ERROR_4);
2135	AssertReturn(pStreamWas->pDevCfg->pDevEntry->enmDir == pStreamWas->Core.pStream->Cfg.enmDir, VERR_INTERNAL_ERROR_4);
2136	AssertReturn(pStreamWas->pDevCfg->pIAudioClient == NULL, VERR_INTERNAL_ERROR_5);
2137	AssertReturn(pStreamWas->pDevCfg->pIAudioRenderClient == NULL, VERR_INTERNAL_ERROR_5);
2138	AssertReturn(pStreamWas->pDevCfg->pIAudioCaptureClient == NULL, VERR_INTERNAL_ERROR_5);
2139
2140	/*
2141	* Do the job.
2142	*/
2143	int rc;
2144	if (!fDestroyed)
2145	rc = drvHostAudioWasCacheInitConfig(pStreamWas->pDevCfg);
2146	else
2147	{
2148	AssertReturn(pStreamWas->pDevCfg->rcSetup == VERR_AUDIO_STREAM_INIT_IN_PROGRESS, VERR_INTERNAL_ERROR_2);
2149	pStreamWas->pDevCfg->rcSetup = VERR_WRONG_ORDER;
2150	rc = VINF_SUCCESS;
2151	}
2152
2153	LogFlowFunc(("returns %Rrc (%s)\n", rc, pStreamWas->Cfg.szName));
2154	return rc;
2155	}
2156
2157
2158	/**
2159	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDestroy}
2160	*/
2161	static DECLCALLBACK(int) drvHostAudioWasHA_StreamDestroy(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
2162	bool fImmediate)
2163	{
2164	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
2165	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2166	AssertPtrReturn(pStreamWas, VERR_INVALID_POINTER);
2167	LogFlowFunc(("Stream '%s'\n", pStreamWas->Cfg.szName));
2168	RT_NOREF(fImmediate);
2169	HRESULT hrc;
2170
2171	if (RTCritSectIsInitialized(&pStreamWas->CritSect))
2172	{
2173	RTCritSectRwEnterExcl(&pThis->CritSectStreamList);
2174	RTListNodeRemove(&pStreamWas->ListEntry);
2175	RTCritSectRwLeaveExcl(&pThis->CritSectStreamList);
2176
2177	RTCritSectDelete(&pStreamWas->CritSect);
2178	}
2179
2180	if (pStreamWas->fStarted && pStreamWas->pDevCfg && pStreamWas->pDevCfg->pIAudioClient)
2181	{
2182	hrc = pStreamWas->pDevCfg->pIAudioClient->Stop();
2183	LogFunc(("Stop('%s') -> %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2184	pStreamWas->fStarted = false;
2185	}
2186
2187	if (pStreamWas->cFramesCaptureToRelease)
2188	{
2189	hrc = pStreamWas->pDevCfg->pIAudioCaptureClient->ReleaseBuffer(0);
2190	Log4Func(("Releasing capture buffer (%#x frames): %Rhrc\n", pStreamWas->cFramesCaptureToRelease, hrc));
2191	pStreamWas->cFramesCaptureToRelease = 0;
2192	pStreamWas->pbCapture = NULL;
2193	pStreamWas->cbCapture = 0;
2194	}
2195
2196	if (pStreamWas->pDevCfg)
2197	{
2198	drvHostAudioWasCachePutBack(pThis, pStreamWas->pDevCfg);
2199	pStreamWas->pDevCfg = NULL;
2200	}
2201
2202	LogFlowFunc(("returns\n"));
2203	return VINF_SUCCESS;
2204	}
2205
2206
2207	/**
2208	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamNotifyDeviceChanged}
2209	*/
2210	static DECLCALLBACK(void) drvHostAudioWasHA_StreamNotifyDeviceChanged(PPDMIHOSTAUDIO pInterface,
2211	PPDMAUDIOBACKENDSTREAM pStream, void *pvUser)
2212	{
2213	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
2214	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2215	LogFlowFunc(("pStreamWas=%p (%s)\n", pStreamWas, pStreamWas->Cfg.szName));
2216	RT_NOREF(pvUser);
2217
2218	/*
2219	* See if we've got a cached config for the new device around.
2220	* We ignore this entirely, for now at least, if the device was
2221	* disconnected and there is no replacement.
2222	*/
2223	pThis->pNotifyClient->lockEnter();
2224	IMMDevice *pIDevice = pStreamWas->Cfg.enmDir == PDMAUDIODIR_IN ? pThis->pIDeviceInput : pThis->pIDeviceOutput;
2225	if (pIDevice)
2226	pIDevice->AddRef();
2227	pThis->pNotifyClient->lockLeave();
2228	if (pIDevice)
2229	{
2230	PDRVHOSTAUDIOWASCACHEDEVCFG pDevCfg = NULL;
2231	int rc = drvHostAudioWasCacheLookupOrCreate(pThis, pIDevice, &pStreamWas->Cfg, false /fOnWorker/, &pDevCfg);
2232
2233	pIDevice->Release();
2234	pIDevice = NULL;
2235
2236	/*
2237	* If we have a working audio client, just do the switch.
2238	*/
2239	if (RT_SUCCESS(rc) && pDevCfg->pIAudioClient)
2240	{
2241	LogFlowFunc(("New device config is ready already!\n"));
2242	Assert(rc == VINF_SUCCESS);
2243	drvHostAudioWasCompleteStreamDevSwitch(pThis, pStreamWas, pDevCfg);
2244	}
2245	/*
2246	* Otherwise create one asynchronously on a worker thread.
2247	*/
2248	else if (RT_SUCCESS(rc))
2249	{
2250	LogFlowFunc(("New device config needs async init ...\n"));
2251	Assert(rc == VINF_AUDIO_STREAM_ASYNC_INIT_NEEDED);
2252
2253	RTCritSectEnter(&pStreamWas->CritSect);
2254	pStreamWas->fSwitchingDevice = true;
2255	RTCritSectLeave(&pStreamWas->CritSect);
2256
2257	pThis->pIHostAudioPort->pfnStreamNotifyPreparingDeviceSwitch(pThis->pIHostAudioPort, &pStreamWas->Core);
2258
2259	rc = pThis->pIHostAudioPort->pfnDoOnWorkerThread(pThis->pIHostAudioPort, &pStreamWas->Core,
2260	DRVHOSTAUDIOWAS_DO_STREAM_DEV_SWITCH, pDevCfg);
2261	AssertRCStmt(rc, drvHostAudioWasDoStreamDevSwitch(pThis, pStreamWas, pDevCfg));
2262	}
2263	else
2264	{
2265	LogRelMax(64, ("WasAPI: Failed to create new device config '%ls:%s' for stream '%s': %Rrc\n",
2266	pDevCfg->pDevEntry->wszDevId, pDevCfg->szProps, pStreamWas->Cfg.szName, rc));
2267
2268	pThis->pIHostAudioPort->pfnStreamNotifyDeviceChanged(pThis->pIHostAudioPort, &pStreamWas->Core, true /fReInit/);
2269	}
2270	}
2271	else
2272	LogFlowFunc(("no new device, leaving it as-is\n"));
2273	}
2274
2275
2276	/**
2277	* Wrapper for starting a stream.
2278	*
2279	* @returns VBox status code.
2280	* @param pThis The WASAPI host audio driver instance data.
2281	* @param pStreamWas The stream.
2282	* @param pszOperation The operation we're doing.
2283	*/
2284	static int drvHostAudioWasStreamStartWorker(PDRVHOSTAUDIOWAS pThis, PDRVHOSTAUDIOWASSTREAM pStreamWas, const char *pszOperation)
2285	{
2286	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->Start();
2287	LogFlow(("%s: Start(%s) returns %Rhrc\n", pszOperation, pStreamWas->Cfg.szName, hrc));
2288	AssertStmt(hrc != AUDCLNT_E_NOT_STOPPED, hrc = S_OK);
2289	if (SUCCEEDED(hrc))
2290	{
2291	pStreamWas->fStarted = true;
2292	return VINF_SUCCESS;
2293	}
2294
2295	/** @todo try re-setup the stuff on AUDCLNT_E_DEVICEINVALIDATED.
2296	* Need some way of telling the caller (e.g. playback, capture) so they can
2297	* retry what they're doing */
2298	RT_NOREF(pThis);
2299
2300	pStreamWas->fStarted = false;
2301	LogRelMax(64, ("WasAPI: Starting '%s' failed (%s): %Rhrc\n", pStreamWas->Cfg.szName, pszOperation, hrc));
2302	return VERR_AUDIO_STREAM_NOT_READY;
2303	}
2304
2305
2306	/**
2307	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamEnable}
2308	*/
2309	static DECLCALLBACK(int) drvHostAudioWasHA_StreamEnable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2310	{
2311	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
2312	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2313	LogFlowFunc(("Stream '%s' {%s}\n", pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas)));
2314	HRESULT hrc;
2315	RTCritSectEnter(&pStreamWas->CritSect);
2316
2317	Assert(!pStreamWas->fEnabled);
2318	Assert(!pStreamWas->fStarted);
2319
2320	/*
2321	* We always reset the buffer before enabling the stream (normally never necessary).
2322	*/
2323	if (pStreamWas->cFramesCaptureToRelease)
2324	{
2325	hrc = pStreamWas->pDevCfg->pIAudioCaptureClient->ReleaseBuffer(pStreamWas->cFramesCaptureToRelease);
2326	Log4Func(("Releasing capture buffer (%#x frames): %Rhrc\n", pStreamWas->cFramesCaptureToRelease, hrc));
2327	pStreamWas->cFramesCaptureToRelease = 0;
2328	pStreamWas->pbCapture = NULL;
2329	pStreamWas->cbCapture = 0;
2330	}
2331
2332	hrc = pStreamWas->pDevCfg->pIAudioClient->Reset();
2333	if (FAILED(hrc))
2334	LogRelMax(64, ("WasAPI: Stream reset failed when enabling '%s': %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2335	pStreamWas->offInternal = 0;
2336	pStreamWas->fDraining = false;
2337	pStreamWas->fEnabled = true;
2338	pStreamWas->fRestartOnResume = false;
2339
2340	/*
2341	* Input streams will start capturing, while output streams will only start
2342	* playing once we get some audio data to play.
2343	*/
2344	int rc = VINF_SUCCESS;
2345	if (pStreamWas->Cfg.enmDir == PDMAUDIODIR_IN)
2346	rc = drvHostAudioWasStreamStartWorker(pThis, pStreamWas, "enable");
2347	else
2348	Assert(pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT);
2349
2350	RTCritSectLeave(&pStreamWas->CritSect);
2351	LogFlowFunc(("returns %Rrc\n", rc));
2352	return rc;
2353	}
2354
2355
2356	/**
2357	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDisable}
2358	*/
2359	static DECLCALLBACK(int) drvHostAudioWasHA_StreamDisable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2360	{
2361	RT_NOREF(pInterface);
2362	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2363	LogFlowFunc(("cMsLastTransfer=%RI64 ms, stream '%s' {%s} \n",
2364	pStreamWas->msLastTransfer ? RTTimeMilliTS() - pStreamWas->msLastTransfer : -1,
2365	pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas) ));
2366	RTCritSectEnter(&pStreamWas->CritSect);
2367
2368	/*
2369	* Always try stop it (draining or no).
2370	*/
2371	pStreamWas->fEnabled = false;
2372	pStreamWas->fRestartOnResume = false;
2373	Assert(!pStreamWas->fDraining \|\| pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT);
2374
2375	int rc = VINF_SUCCESS;
2376	if (pStreamWas->fStarted)
2377	{
2378	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->Stop();
2379	LogFlowFunc(("Stop(%s) returns %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2380	if (FAILED(hrc))
2381	{
2382	LogRelMax(64, ("WasAPI: Stopping '%s' failed (disable): %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2383	rc = VERR_GENERAL_FAILURE;
2384	}
2385	pStreamWas->fStarted = false;
2386	pStreamWas->fDraining = false;
2387	}
2388
2389	RTCritSectLeave(&pStreamWas->CritSect);
2390	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHostWasStreamStatusString(pStreamWas)));
2391	return rc;
2392	}
2393
2394
2395	/**
2396	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPause}
2397	*
2398	* @note Basically the same as drvHostAudioWasHA_StreamDisable, just w/o the
2399	* buffer resetting and fEnabled change.
2400	*/
2401	static DECLCALLBACK(int) drvHostAudioWasHA_StreamPause(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2402	{
2403	RT_NOREF(pInterface);
2404	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2405	LogFlowFunc(("cMsLastTransfer=%RI64 ms, stream '%s' {%s} \n",
2406	pStreamWas->msLastTransfer ? RTTimeMilliTS() - pStreamWas->msLastTransfer : -1,
2407	pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas) ));
2408	RTCritSectEnter(&pStreamWas->CritSect);
2409
2410	/*
2411	* Unless we're draining the stream, stop it if it's started.
2412	*/
2413	int rc = VINF_SUCCESS;
2414	if (pStreamWas->fStarted && !pStreamWas->fDraining)
2415	{
2416	pStreamWas->fRestartOnResume = true;
2417
2418	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->Stop();
2419	LogFlowFunc(("Stop(%s) returns %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2420	if (FAILED(hrc))
2421	{
2422	LogRelMax(64, ("WasAPI: Stopping '%s' failed (pause): %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2423	rc = VERR_GENERAL_FAILURE;
2424	}
2425	pStreamWas->fStarted = false;
2426	}
2427	else
2428	{
2429	pStreamWas->fRestartOnResume = false;
2430	if (pStreamWas->fDraining)
2431	{
2432	LogFunc(("Stream '%s' is draining\n", pStreamWas->Cfg.szName));
2433	Assert(pStreamWas->fStarted);
2434	}
2435	}
2436
2437	RTCritSectLeave(&pStreamWas->CritSect);
2438	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHostWasStreamStatusString(pStreamWas)));
2439	return rc;
2440	}
2441
2442
2443	/**
2444	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamResume}
2445	*/
2446	static DECLCALLBACK(int) drvHostAudioWasHA_StreamResume(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2447	{
2448	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
2449	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2450	LogFlowFunc(("Stream '%s' {%s}\n", pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas)));
2451	RTCritSectEnter(&pStreamWas->CritSect);
2452
2453	/*
2454	* Resume according to state saved by drvHostAudioWasHA_StreamPause.
2455	*/
2456	int rc;
2457	if (pStreamWas->fRestartOnResume)
2458	rc = drvHostAudioWasStreamStartWorker(pThis, pStreamWas, "resume");
2459	else
2460	rc = VINF_SUCCESS;
2461	pStreamWas->fRestartOnResume = false;
2462
2463	RTCritSectLeave(&pStreamWas->CritSect);
2464	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHostWasStreamStatusString(pStreamWas)));
2465	return rc;
2466	}
2467
2468
2469	/**
2470	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDrain}
2471	*/
2472	static DECLCALLBACK(int) drvHostAudioWasHA_StreamDrain(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2473	{
2474	RT_NOREF(pInterface);
2475	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2476	AssertReturn(pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT, VERR_INVALID_PARAMETER);
2477	LogFlowFunc(("cMsLastTransfer=%RI64 ms, stream '%s' {%s} \n",
2478	pStreamWas->msLastTransfer ? RTTimeMilliTS() - pStreamWas->msLastTransfer : -1,
2479	pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas) ));
2480
2481	/*
2482	* If the stram was started, calculate when the buffered data has finished
2483	* playing and switch to drain mode. DrvAudio will keep on calling
2484	* pfnStreamPlay with an empty buffer while we're draining, so we'll use
2485	* that for checking the deadline and finally stopping the stream.
2486	*/
2487	RTCritSectEnter(&pStreamWas->CritSect);
2488	int rc = VINF_SUCCESS;
2489	if (pStreamWas->fStarted)
2490	{
2491	if (!pStreamWas->fDraining)
2492	{
2493	uint64_t const msNow = RTTimeMilliTS();
2494	uint64_t msDrainDeadline = 0;
2495	UINT32 cFramesPending = 0;
2496	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->GetCurrentPadding(&cFramesPending);
2497	if (SUCCEEDED(hrc))
2498	msDrainDeadline = msNow
2499	+ PDMAudioPropsFramesToMilli(&pStreamWas->Cfg.Props,
2500	RT_MIN(cFramesPending,
2501	pStreamWas->Cfg.Backend.cFramesBufferSize * 2))
2502	+ 1 /fudge/;
2503	else
2504	{
2505	msDrainDeadline = msNow;
2506	LogRelMax(64, ("WasAPI: GetCurrentPadding fail on '%s' when starting draining: %Rhrc\n",
2507	pStreamWas->Cfg.szName, hrc));
2508	}
2509	pStreamWas->msDrainDeadline = msDrainDeadline;
2510	pStreamWas->fDraining = true;
2511	}
2512	else
2513	LogFlowFunc(("Already draining '%s' ...\n", pStreamWas->Cfg.szName));
2514	}
2515	else
2516	{
2517	LogFlowFunc(("Drain requested for '%s', but not started playback...\n", pStreamWas->Cfg.szName));
2518	AssertStmt(!pStreamWas->fDraining, pStreamWas->fDraining = false);
2519	}
2520	RTCritSectLeave(&pStreamWas->CritSect);
2521
2522	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHostWasStreamStatusString(pStreamWas)));
2523	return rc;
2524	}
2525
2526
2527	/**
2528	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetState}
2529	*/
2530	static DECLCALLBACK(PDMHOSTAUDIOSTREAMSTATE) drvHostAudioWasHA_StreamGetState(PPDMIHOSTAUDIO pInterface,
2531	PPDMAUDIOBACKENDSTREAM pStream)
2532	{
2533	RT_NOREF(pInterface);
2534	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2535	AssertPtrReturn(pStreamWas, PDMHOSTAUDIOSTREAMSTATE_INVALID);
2536
2537	PDMHOSTAUDIOSTREAMSTATE enmState;
2538	AssertPtr(pStreamWas->pDevCfg);
2539	if (pStreamWas->pDevCfg /paranoia/)
2540	{
2541	if (RT_SUCCESS(pStreamWas->pDevCfg->rcSetup))
2542	{
2543	if (!pStreamWas->fDraining)
2544	enmState = PDMHOSTAUDIOSTREAMSTATE_OKAY;
2545	else
2546	{
2547	Assert(pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT);
2548	enmState = PDMHOSTAUDIOSTREAMSTATE_DRAINING;
2549	}
2550	}
2551	else if ( pStreamWas->pDevCfg->rcSetup == VERR_AUDIO_STREAM_INIT_IN_PROGRESS
2552	\|\| pStreamWas->fSwitchingDevice )
2553	enmState = PDMHOSTAUDIOSTREAMSTATE_INITIALIZING;
2554	else
2555	enmState = PDMHOSTAUDIOSTREAMSTATE_NOT_WORKING;
2556	}
2557	else if (pStreamWas->fSwitchingDevice)
2558	enmState = PDMHOSTAUDIOSTREAMSTATE_INITIALIZING;
2559	else
2560	enmState = PDMHOSTAUDIOSTREAMSTATE_NOT_WORKING;
2561
2562	LogFlowFunc(("returns %d for '%s' {%s}\n", enmState, pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas)));
2563	return enmState;
2564	}
2565
2566
2567	/**
2568	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetPending}
2569	*/
2570	static DECLCALLBACK(uint32_t) drvHostAudioWasHA_StreamGetPending(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2571	{
2572	RT_NOREF(pInterface);
2573	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2574	AssertPtrReturn(pStreamWas, 0);
2575	LogFlowFunc(("Stream '%s' {%s}\n", pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas)));
2576	AssertReturn(pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT, 0);
2577
2578	uint32_t cbPending = 0;
2579	RTCritSectEnter(&pStreamWas->CritSect);
2580
2581	if ( pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT
2582	&& pStreamWas->pDevCfg->pIAudioClient /* paranoia */)
2583	{
2584	if (pStreamWas->fStarted)
2585	{
2586	UINT32 cFramesPending = 0;
2587	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->GetCurrentPadding(&cFramesPending);
2588	if (SUCCEEDED(hrc))
2589	{
2590	AssertMsg(cFramesPending <= pStreamWas->Cfg.Backend.cFramesBufferSize,
2591	("cFramesPending=%#x cFramesBufferSize=%#x\n",
2592	cFramesPending, pStreamWas->Cfg.Backend.cFramesBufferSize));
2593	cbPending = PDMAudioPropsFramesToBytes(&pStreamWas->Cfg.Props, RT_MIN(cFramesPending, VBOX_WASAPI_MAX_PADDING));
2594	}
2595	else
2596	LogRelMax(64, ("WasAPI: GetCurrentPadding failed on '%s': %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2597	}
2598	}
2599
2600	RTCritSectLeave(&pStreamWas->CritSect);
2601
2602	LogFlowFunc(("returns %#x (%u) {%s}\n", cbPending, cbPending, drvHostWasStreamStatusString(pStreamWas)));
2603	return cbPending;
2604	}
2605
2606
2607	/**
2608	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetWritable}
2609	*/
2610	static DECLCALLBACK(uint32_t) drvHostAudioWasHA_StreamGetWritable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2611	{
2612	RT_NOREF(pInterface);
2613	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2614	AssertPtrReturn(pStreamWas, 0);
2615	LogFlowFunc(("Stream '%s' {%s}\n", pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas)));
2616	Assert(pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT);
2617
2618	uint32_t cbWritable = 0;
2619	RTCritSectEnter(&pStreamWas->CritSect);
2620
2621	if ( pStreamWas->Cfg.enmDir == PDMAUDIODIR_OUT
2622	&& pStreamWas->pDevCfg->pIAudioClient /* paranoia */)
2623	{
2624	UINT32 cFramesPending = 0;
2625	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->GetCurrentPadding(&cFramesPending);
2626	if (SUCCEEDED(hrc))
2627	{
2628	if (cFramesPending < pStreamWas->Cfg.Backend.cFramesBufferSize)
2629	cbWritable = PDMAudioPropsFramesToBytes(&pStreamWas->Cfg.Props,
2630	pStreamWas->Cfg.Backend.cFramesBufferSize - cFramesPending);
2631	else if (cFramesPending > pStreamWas->Cfg.Backend.cFramesBufferSize)
2632	{
2633	LogRelMax(64, ("WasAPI: Warning! GetCurrentPadding('%s') return too high: cFramesPending=%#x > cFramesBufferSize=%#x\n",
2634	pStreamWas->Cfg.szName, cFramesPending, pStreamWas->Cfg.Backend.cFramesBufferSize));
2635	AssertMsgFailed(("cFramesPending=%#x > cFramesBufferSize=%#x\n",
2636	cFramesPending, pStreamWas->Cfg.Backend.cFramesBufferSize));
2637	}
2638	}
2639	else
2640	LogRelMax(64, ("WasAPI: GetCurrentPadding failed on '%s': %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2641	}
2642
2643	RTCritSectLeave(&pStreamWas->CritSect);
2644
2645	LogFlowFunc(("returns %#x (%u) {%s}\n", cbWritable, cbWritable, drvHostWasStreamStatusString(pStreamWas)));
2646	return cbWritable;
2647	}
2648
2649
2650	/**
2651	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPlay}
2652	*/
2653	static DECLCALLBACK(int) drvHostAudioWasHA_StreamPlay(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
2654	const void pvBuf, uint32_t cbBuf, uint32_t pcbWritten)
2655	{
2656	PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
2657	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2658	AssertPtrReturn(pStreamWas, VERR_INVALID_POINTER);
2659	AssertPtrReturn(pcbWritten, VERR_INVALID_POINTER);
2660	if (cbBuf)
2661	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
2662	Assert(PDMAudioPropsIsSizeAligned(&pStreamWas->Cfg.Props, cbBuf));
2663
2664	RTCritSectEnter(&pStreamWas->CritSect);
2665	if (pStreamWas->fEnabled)
2666	{ /* likely */ }
2667	else
2668	{
2669	RTCritSectLeave(&pStreamWas->CritSect);
2670	*pcbWritten = 0;
2671	LogFunc(("Skipping %#x byte write to disabled stream {%s}\n", cbBuf, drvHostWasStreamStatusString(pStreamWas)));
2672	return VINF_SUCCESS;
2673	}
2674	Log4Func(("cbBuf=%#x stream '%s' {%s}\n", cbBuf, pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas) ));
2675
2676	/*
2677	* Transfer loop.
2678	*/
2679	int rc = VINF_SUCCESS;
2680	uint32_t cReInits = 0;
2681	uint32_t cbWritten = 0;
2682	while (cbBuf > 0)
2683	{
2684	AssertBreakStmt(pStreamWas->pDevCfg && pStreamWas->pDevCfg->pIAudioRenderClient && pStreamWas->pDevCfg->pIAudioClient,
2685	rc = VERR_AUDIO_STREAM_NOT_READY);
2686
2687	/*
2688	* Figure out how much we can possibly write.
2689	*/
2690	UINT32 cFramesPending = 0;
2691	uint32_t cbWritable = 0;
2692	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->GetCurrentPadding(&cFramesPending);
2693	if (SUCCEEDED(hrc))
2694	cbWritable = PDMAudioPropsFramesToBytes(&pStreamWas->Cfg.Props,
2695	pStreamWas->Cfg.Backend.cFramesBufferSize
2696	- RT_MIN(cFramesPending, pStreamWas->Cfg.Backend.cFramesBufferSize));
2697	else
2698	{
2699	LogRelMax(64, ("WasAPI: GetCurrentPadding(%s) failed during playback: %Rhrc (@%#RX64)\n",
2700	pStreamWas->Cfg.szName, hrc, pStreamWas->offInternal));
2701	/** @todo reinit on AUDCLNT_E_DEVICEINVALIDATED? */
2702	rc = VERR_AUDIO_STREAM_NOT_READY;
2703	break;
2704	}
2705	if (cbWritable <= PDMAudioPropsFrameSize(&pStreamWas->Cfg.Props))
2706	break;
2707
2708	uint32_t const cbToWrite = PDMAudioPropsFloorBytesToFrame(&pStreamWas->Cfg.Props, RT_MIN(cbWritable, cbBuf));
2709	uint32_t const cFramesToWrite = PDMAudioPropsBytesToFrames(&pStreamWas->Cfg.Props, cbToWrite);
2710	Assert(PDMAudioPropsFramesToBytes(&pStreamWas->Cfg.Props, cFramesToWrite) == cbToWrite);
2711	Log3Func(("@%#RX64: cFramesPending=%#x -> cbWritable=%#x cbToWrite=%#x cFramesToWrite=%#x {%s}\n",
2712	pStreamWas->offInternal, cFramesPending, cbWritable, cbToWrite, cFramesToWrite,
2713	drvHostWasStreamStatusString(pStreamWas) ));
2714
2715	/*
2716	* Get the buffer, copy the data into it, and relase it back to the WAS machinery.
2717	*/
2718	BYTE *pbData = NULL;
2719	hrc = pStreamWas->pDevCfg->pIAudioRenderClient->GetBuffer(cFramesToWrite, &pbData);
2720	if (SUCCEEDED(hrc))
2721	{
2722	memcpy(pbData, pvBuf, cbToWrite);
2723	hrc = pStreamWas->pDevCfg->pIAudioRenderClient->ReleaseBuffer(cFramesToWrite, 0 /fFlags/);
2724	if (SUCCEEDED(hrc))
2725	{
2726	/*
2727	* Before we advance the buffer position (so we can resubmit it
2728	* after re-init), make sure we've successfully started stream.
2729	*/
2730	if (pStreamWas->fStarted)
2731	{ }
2732	else
2733	{
2734	rc = drvHostAudioWasStreamStartWorker(pThis, pStreamWas, "play");
2735	if (rc == VINF_SUCCESS)
2736	{ /* likely */ }
2737	else if (RT_SUCCESS(rc) && ++cReInits < 5)
2738	continue; /* re-submit buffer after re-init */
2739	else
2740	break;
2741	}
2742
2743	/* advance. */
2744	pvBuf = (uint8_t *)pvBuf + cbToWrite;
2745	cbBuf -= cbToWrite;
2746	cbWritten += cbToWrite;
2747	pStreamWas->offInternal += cbToWrite;
2748	}
2749	else
2750	{
2751	LogRelMax(64, ("WasAPI: ReleaseBuffer(%#x) failed on '%s' during playback: %Rhrc (@%#RX64)\n",
2752	cFramesToWrite, pStreamWas->Cfg.szName, hrc, pStreamWas->offInternal));
2753	/** @todo reinit on AUDCLNT_E_DEVICEINVALIDATED? */
2754	rc = VERR_AUDIO_STREAM_NOT_READY;
2755	break;
2756	}
2757	}
2758	else
2759	{
2760	LogRelMax(64, ("WasAPI: GetBuffer(%#x) failed on '%s' during playback: %Rhrc (@%#RX64)\n",
2761	cFramesToWrite, pStreamWas->Cfg.szName, hrc, pStreamWas->offInternal));
2762	/** @todo reinit on AUDCLNT_E_DEVICEINVALIDATED? */
2763	rc = VERR_AUDIO_STREAM_NOT_READY;
2764	break;
2765	}
2766	}
2767
2768	/*
2769	* Do draining deadline processing.
2770	*/
2771	uint64_t const msNow = RTTimeMilliTS();
2772	if ( !pStreamWas->fDraining
2773	\|\| msNow < pStreamWas->msDrainDeadline)
2774	{ /* likely */ }
2775	else
2776	{
2777	LogRel2(("WasAPI: Stopping draining of '%s' {%s} ...\n", pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas)));
2778	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->Stop();
2779	if (FAILED(hrc))
2780	LogRelMax(64, ("WasAPI: Failed to stop draining stream '%s': %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2781	pStreamWas->fDraining = false;
2782	pStreamWas->fStarted = false;
2783	pStreamWas->fEnabled = false;
2784	}
2785
2786	/*
2787	* Done.
2788	*/
2789	uint64_t const msPrev = pStreamWas->msLastTransfer; RT_NOREF(msPrev);
2790	if (cbWritten)
2791	pStreamWas->msLastTransfer = msNow;
2792
2793	RTCritSectLeave(&pStreamWas->CritSect);
2794
2795	*pcbWritten = cbWritten;
2796	if (RT_SUCCESS(rc) \|\| !cbWritten)
2797	{ }
2798	else
2799	{
2800	LogFlowFunc(("Suppressing %Rrc to report %#x bytes written\n", rc, cbWritten));
2801	rc = VINF_SUCCESS;
2802	}
2803	LogFlowFunc(("@%#RX64: rc=%Rrc cbWritten=%RU32 cMsDelta=%RU64 (%RU64 -> %RU64) {%s}\n", pStreamWas->offInternal, rc, cbWritten,
2804	msPrev ? msNow - msPrev : 0, msPrev, pStreamWas->msLastTransfer, drvHostWasStreamStatusString(pStreamWas) ));
2805	return rc;
2806	}
2807
2808
2809	/**
2810	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetReadable}
2811	*/
2812	static DECLCALLBACK(uint32_t) drvHostAudioWasHA_StreamGetReadable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2813	{
2814	RT_NOREF(pInterface);
2815	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2816	AssertPtrReturn(pStreamWas, 0);
2817	Assert(pStreamWas->Cfg.enmDir == PDMAUDIODIR_IN);
2818
2819	uint32_t cbReadable = 0;
2820	RTCritSectEnter(&pStreamWas->CritSect);
2821
2822	if (pStreamWas->pDevCfg->pIAudioCaptureClient /* paranoia */)
2823	{
2824	UINT32 cFramesPending = 0;
2825	HRESULT hrc = pStreamWas->pDevCfg->pIAudioClient->GetCurrentPadding(&cFramesPending);
2826	if (SUCCEEDED(hrc))
2827	{
2828	/* An unreleased buffer is included in the pending frame count, so subtract
2829	whatever we've got hanging around since the previous pfnStreamCapture call. */
2830	AssertMsgStmt(cFramesPending >= pStreamWas->cFramesCaptureToRelease,
2831	("%#x vs %#x\n", cFramesPending, pStreamWas->cFramesCaptureToRelease),
2832	cFramesPending = pStreamWas->cFramesCaptureToRelease);
2833	cFramesPending -= pStreamWas->cFramesCaptureToRelease;
2834
2835	/* Add what we've got left in said buffer. */
2836	uint32_t cFramesCurPacket = PDMAudioPropsBytesToFrames(&pStreamWas->Cfg.Props, pStreamWas->cbCapture);
2837	cFramesPending += cFramesCurPacket;
2838
2839	/* Paranoia: Make sure we don't exceed the buffer size. */
2840	AssertMsgStmt(cFramesPending <= pStreamWas->Cfg.Backend.cFramesBufferSize,
2841	("cFramesPending=%#x cFramesCaptureToRelease=%#x cFramesCurPacket=%#x cFramesBufferSize=%#x\n",
2842	cFramesPending, pStreamWas->cFramesCaptureToRelease, cFramesCurPacket,
2843	pStreamWas->Cfg.Backend.cFramesBufferSize),
2844	cFramesPending = pStreamWas->Cfg.Backend.cFramesBufferSize);
2845
2846	cbReadable = PDMAudioPropsFramesToBytes(&pStreamWas->Cfg.Props, cFramesPending);
2847	}
2848	else
2849	LogRelMax(64, ("WasAPI: GetCurrentPadding failed on '%s': %Rhrc\n", pStreamWas->Cfg.szName, hrc));
2850	}
2851
2852	RTCritSectLeave(&pStreamWas->CritSect);
2853
2854	LogFlowFunc(("returns %#x (%u) {%s}\n", cbReadable, cbReadable, drvHostWasStreamStatusString(pStreamWas)));
2855	return cbReadable;
2856	}
2857
2858
2859	/**
2860	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCapture}
2861	*/
2862	static DECLCALLBACK(int) drvHostAudioWasHA_StreamCapture(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
2863	void pvBuf, uint32_t cbBuf, uint32_t pcbRead)
2864	{
2865	RT_NOREF(pInterface); //PDRVHOSTAUDIOWAS pThis = RT_FROM_MEMBER(pInterface, DRVHOSTAUDIOWAS, IHostAudio);
2866	PDRVHOSTAUDIOWASSTREAM pStreamWas = (PDRVHOSTAUDIOWASSTREAM)pStream;
2867	AssertPtrReturn(pStreamWas, 0);
2868	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
2869	AssertReturn(cbBuf, VERR_INVALID_PARAMETER);
2870	AssertPtrReturn(pcbRead, VERR_INVALID_POINTER);
2871	Assert(PDMAudioPropsIsSizeAligned(&pStreamWas->Cfg.Props, cbBuf));
2872
2873	RTCritSectEnter(&pStreamWas->CritSect);
2874	if (pStreamWas->fEnabled)
2875	{ /* likely */ }
2876	else
2877	{
2878	RTCritSectLeave(&pStreamWas->CritSect);
2879	*pcbRead = 0;
2880	LogFunc(("Skipping %#x byte read from disabled stream {%s}\n", cbBuf, drvHostWasStreamStatusString(pStreamWas)));
2881	return VINF_SUCCESS;
2882	}
2883	Log4Func(("cbBuf=%#x stream '%s' {%s}\n", cbBuf, pStreamWas->Cfg.szName, drvHostWasStreamStatusString(pStreamWas) ));
2884
2885
2886	/*
2887	* Transfer loop.
2888	*/
2889	int rc = VINF_SUCCESS;
2890	uint32_t cbRead = 0;
2891	uint32_t const cbFrame = PDMAudioPropsFrameSize(&pStreamWas->Cfg.Props);
2892	while (cbBuf >= cbFrame)
2893	{
2894	AssertBreakStmt(pStreamWas->pDevCfg->pIAudioCaptureClient && pStreamWas->pDevCfg->pIAudioClient, rc = VERR_AUDIO_STREAM_NOT_READY);
2895
2896	/*
2897	* Anything pending from last call?
2898	* (This is rather similar to the Pulse interface.)
2899	*/
2900	if (pStreamWas->cFramesCaptureToRelease)
2901	{
2902	uint32_t const cbToCopy = RT_MIN(pStreamWas->cbCapture, cbBuf);
2903	memcpy(pvBuf, pStreamWas->pbCapture, cbToCopy);
2904	pvBuf = (uint8_t *)pvBuf + cbToCopy;
2905	cbBuf -= cbToCopy;
2906	cbRead += cbToCopy;
2907	pStreamWas->offInternal += cbToCopy;
2908	pStreamWas->pbCapture += cbToCopy;
2909	pStreamWas->cbCapture -= cbToCopy;
2910	if (!pStreamWas->cbCapture)
2911	{
2912	HRESULT hrc = pStreamWas->pDevCfg->pIAudioCaptureClient->ReleaseBuffer(pStreamWas->cFramesCaptureToRelease);
2913	Log4Func(("@%#RX64: Releasing capture buffer (%#x frames): %Rhrc\n",
2914	pStreamWas->offInternal, pStreamWas->cFramesCaptureToRelease, hrc));
2915	if (SUCCEEDED(hrc))
2916	{
2917	pStreamWas->cFramesCaptureToRelease = 0;
2918	pStreamWas->pbCapture = NULL;
2919	}
2920	else
2921	{
2922	LogRelMax(64, ("WasAPI: ReleaseBuffer(%s) failed during capture: %Rhrc (@%#RX64)\n",
2923	pStreamWas->Cfg.szName, hrc, pStreamWas->offInternal));
2924	/** @todo reinit on AUDCLNT_E_DEVICEINVALIDATED? */
2925	rc = VERR_AUDIO_STREAM_NOT_READY;
2926	break;
2927	}
2928	}
2929	if (cbBuf < cbFrame)
2930	break;
2931	}
2932
2933	/*
2934	* Figure out if there is any data available to be read now. (Docs hint that we can not
2935	* skip this and go straight for GetBuffer or we risk getting unwritten buffer space back).
2936	*/
2937	UINT32 cFramesCaptured = 0;
2938	HRESULT hrc = pStreamWas->pDevCfg->pIAudioCaptureClient->GetNextPacketSize(&cFramesCaptured);
2939	if (SUCCEEDED(hrc))
2940	{
2941	if (!cFramesCaptured)
2942	break;
2943	}
2944	else
2945	{
2946	LogRelMax(64, ("WasAPI: GetNextPacketSize(%s) failed during capture: %Rhrc (@%#RX64)\n",
2947	pStreamWas->Cfg.szName, hrc, pStreamWas->offInternal));
2948	/** @todo reinit on AUDCLNT_E_DEVICEINVALIDATED? */
2949	rc = VERR_AUDIO_STREAM_NOT_READY;
2950	break;
2951	}
2952
2953	/*
2954	* Get the buffer.
2955	*/
2956	cFramesCaptured = 0;
2957	UINT64 uQpsNtTicks = 0;
2958	UINT64 offDevice = 0;
2959	DWORD fBufFlags = 0;
2960	BYTE *pbData = NULL;
2961	hrc = pStreamWas->pDevCfg->pIAudioCaptureClient->GetBuffer(&pbData, &cFramesCaptured, &fBufFlags, &offDevice, &uQpsNtTicks);
2962	Log4Func(("@%#RX64: GetBuffer -> %Rhrc pbData=%p cFramesCaptured=%#x fBufFlags=%#x offDevice=%#RX64 uQpcNtTicks=%#RX64\n",
2963	pStreamWas->offInternal, hrc, pbData, cFramesCaptured, fBufFlags, offDevice, uQpsNtTicks));
2964	if (SUCCEEDED(hrc))
2965	{
2966	Assert(cFramesCaptured < VBOX_WASAPI_MAX_PADDING);
2967	pStreamWas->pbCapture = pbData;
2968	pStreamWas->cFramesCaptureToRelease = cFramesCaptured;
2969	pStreamWas->cbCapture = PDMAudioPropsFramesToBytes(&pStreamWas->Cfg.Props, cFramesCaptured);
2970	/* Just loop and re-use the copying code above. Can optimize later. */
2971	}
2972	else
2973	{
2974	LogRelMax(64, ("WasAPI: GetBuffer() failed on '%s' during capture: %Rhrc (@%#RX64)\n",
2975	pStreamWas->Cfg.szName, hrc, pStreamWas->offInternal));
2976	/** @todo reinit on AUDCLNT_E_DEVICEINVALIDATED? */
2977	rc = VERR_AUDIO_STREAM_NOT_READY;
2978	break;
2979	}
2980	}
2981
2982	/*
2983	* Done.
2984	*/
2985	uint64_t const msPrev = pStreamWas->msLastTransfer; RT_NOREF(msPrev);
2986	uint64_t const msNow = RTTimeMilliTS();
2987	if (cbRead)
2988	pStreamWas->msLastTransfer = msNow;
2989
2990	RTCritSectLeave(&pStreamWas->CritSect);
2991
2992	*pcbRead = cbRead;
2993	if (RT_SUCCESS(rc) \|\| !cbRead)
2994	{ }
2995	else
2996	{
2997	LogFlowFunc(("Suppressing %Rrc to report %#x bytes read\n", rc, cbRead));
2998	rc = VINF_SUCCESS;
2999	}
3000	LogFlowFunc(("@%#RX64: rc=%Rrc cbRead=%#RX32 cMsDelta=%RU64 (%RU64 -> %RU64) {%s}\n", pStreamWas->offInternal, rc, cbRead,
3001	msPrev ? msNow - msPrev : 0, msPrev, pStreamWas->msLastTransfer, drvHostWasStreamStatusString(pStreamWas) ));
3002	return rc;
3003	}
3004
3005
3006	/*********************************************************************************************************************************
3007	* PDMDRVINS::IBase Interface *
3008	*********************************************************************************************************************************/
3009
3010	/**
3011	* @callback_method_impl{PDMIBASE,pfnQueryInterface}
3012	*/
3013	static DECLCALLBACK(void ) drvHostAudioWasQueryInterface(PPDMIBASE pInterface, const char pszIID)
3014	{
3015	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
3016	PDRVHOSTAUDIOWAS pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTAUDIOWAS);
3017
3018	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
3019	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio);
3020	return NULL;
3021	}
3022
3023
3024	/*********************************************************************************************************************************
3025	* PDMDRVREG Interface *
3026	*********************************************************************************************************************************/
3027
3028	/**
3029	* @callback_method_impl{FNPDMDRVDESTRUCT, pfnDestruct}
3030	*/
3031	static DECLCALLBACK(void) drvHostAudioWasPowerOff(PPDMDRVINS pDrvIns)
3032	{
3033	PDRVHOSTAUDIOWAS pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTAUDIOWAS);
3034
3035	/*
3036	* Start purging the cache asynchronously before we get to destruct.
3037	* This might speed up VM shutdown a tiny fraction and also stress
3038	* the shutting down of the thread pool a little.
3039	*/
3040	#if 0
3041	if (pThis->hWorkerThread != NIL_RTTHREAD)
3042	{
3043	BOOL fRc = PostThreadMessageW(pThis->idWorkerThread, WM_DRVHOSTAUDIOWAS_PURGE_CACHE, pThis->uWorkerThreadFixedParam, 0);
3044	LogFlowFunc(("Posted WM_DRVHOSTAUDIOWAS_PURGE_CACHE: %d\n", fRc));
3045	Assert(fRc); RT_NOREF(fRc);
3046	}
3047	#else
3048	if (!RTListIsEmpty(&pThis->CacheHead) && pThis->pIHostAudioPort)
3049	{
3050	int rc = RTSemEventMultiCreate(&pThis->hEvtCachePurge);
3051	if (RT_SUCCESS(rc))
3052	{
3053	rc = pThis->pIHostAudioPort->pfnDoOnWorkerThread(pThis->pIHostAudioPort, NULL/pStream/,
3054	DRVHOSTAUDIOWAS_DO_PURGE_CACHE, NULL /pvUser/);
3055	if (RT_FAILURE(rc))
3056	{
3057	LogFunc(("pfnDoOnWorkerThread/DRVHOSTAUDIOWAS_DO_PURGE_CACHE failed: %Rrc\n", rc));
3058	RTSemEventMultiDestroy(pThis->hEvtCachePurge);
3059	pThis->hEvtCachePurge = NIL_RTSEMEVENTMULTI;
3060	}
3061	}
3062	}
3063	#endif
3064
3065	/*
3066	* Deregister the notification client to reduce the risk of notifications
3067	* comming in while we're being detatched or the VM is being destroyed.
3068	*/
3069	if (pThis->pNotifyClient)
3070	{
3071	pThis->pNotifyClient->notifyDriverDestroyed();
3072	pThis->pIEnumerator->UnregisterEndpointNotificationCallback(pThis->pNotifyClient);
3073	pThis->pNotifyClient->Release();
3074	pThis->pNotifyClient = NULL;
3075	}
3076	}
3077
3078
3079	/**
3080	* @callback_method_impl{FNPDMDRVDESTRUCT, pfnDestruct}
3081	*/
3082	static DECLCALLBACK(void) drvHostAudioWasDestruct(PPDMDRVINS pDrvIns)
3083	{
3084	PDRVHOSTAUDIOWAS pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTAUDIOWAS);
3085	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
3086	LogFlowFuncEnter();
3087
3088	/*
3089	* Release the notification client first.
3090	*/
3091	if (pThis->pNotifyClient)
3092	{
3093	pThis->pNotifyClient->notifyDriverDestroyed();
3094	pThis->pIEnumerator->UnregisterEndpointNotificationCallback(pThis->pNotifyClient);
3095	pThis->pNotifyClient->Release();
3096	pThis->pNotifyClient = NULL;
3097	}
3098
3099	#if 0
3100	if (pThis->hWorkerThread != NIL_RTTHREAD)
3101	{
3102	BOOL fRc = PostThreadMessageW(pThis->idWorkerThread, WM_QUIT, 0, 0);
3103	Assert(fRc); RT_NOREF(fRc);
3104
3105	int rc = RTThreadWait(pThis->hWorkerThread, RT_MS_15SEC, NULL);
3106	AssertRC(rc);
3107	}
3108	#endif
3109
3110	if (RTCritSectIsInitialized(&pThis->CritSectCache))
3111	{
3112	drvHostAudioWasCachePurge(pThis, false /fOnWorker/);
3113	if (pThis->hEvtCachePurge != NIL_RTSEMEVENTMULTI)
3114	RTSemEventMultiWait(pThis->hEvtCachePurge, RT_MS_30SEC);
3115	RTCritSectDelete(&pThis->CritSectCache);
3116	}
3117
3118	if (pThis->hEvtCachePurge != NIL_RTSEMEVENTMULTI)
3119	{
3120	RTSemEventMultiDestroy(pThis->hEvtCachePurge);
3121	pThis->hEvtCachePurge = NIL_RTSEMEVENTMULTI;
3122	}
3123
3124	if (pThis->pIEnumerator)
3125	{
3126	uint32_t cRefs = pThis->pIEnumerator->Release(); RT_NOREF(cRefs);
3127	LogFlowFunc(("cRefs=%d\n", cRefs));
3128	}
3129
3130	if (pThis->pIDeviceOutput)
3131	{
3132	pThis->pIDeviceOutput->Release();
3133	pThis->pIDeviceOutput = NULL;
3134	}
3135
3136	if (pThis->pIDeviceInput)
3137	{
3138	pThis->pIDeviceInput->Release();
3139	pThis->pIDeviceInput = NULL;
3140	}
3141
3142
3143	if (RTCritSectRwIsInitialized(&pThis->CritSectStreamList))
3144	RTCritSectRwDelete(&pThis->CritSectStreamList);
3145
3146	LogFlowFuncLeave();
3147	}
3148
3149
3150	/**
3151	* @callback_method_impl{FNPDMDRVCONSTRUCT, pfnConstruct}
3152	*/
3153	static DECLCALLBACK(int) drvHostAudioWasConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
3154	{
3155	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
3156	PDRVHOSTAUDIOWAS pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTAUDIOWAS);
3157	PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3;
3158	RT_NOREF(fFlags, pCfg);
3159
3160	/*
3161	* Init basic data members and interfaces.
3162	*/
3163	pThis->pDrvIns = pDrvIns;
3164	pThis->hEvtCachePurge = NIL_RTSEMEVENTMULTI;
3165	#if 0
3166	pThis->hWorkerThread = NIL_RTTHREAD;
3167	pThis->idWorkerThread = 0;
3168	#endif
3169	RTListInit(&pThis->StreamHead);
3170	RTListInit(&pThis->CacheHead);
3171	/* IBase */
3172	pDrvIns->IBase.pfnQueryInterface = drvHostAudioWasQueryInterface;
3173	/* IHostAudio */
3174	pThis->IHostAudio.pfnGetConfig = drvHostAudioWasHA_GetConfig;
3175	pThis->IHostAudio.pfnGetDevices = drvHostAudioWasHA_GetDevices;
3176	pThis->IHostAudio.pfnSetDevice = drvHostAudioWasHA_SetDevice;
3177	pThis->IHostAudio.pfnGetStatus = drvHostAudioWasHA_GetStatus;
3178	pThis->IHostAudio.pfnDoOnWorkerThread = drvHostAudioWasHA_DoOnWorkerThread;
3179	pThis->IHostAudio.pfnStreamConfigHint = drvHostAudioWasHA_StreamConfigHint;
3180	pThis->IHostAudio.pfnStreamCreate = drvHostAudioWasHA_StreamCreate;
3181	pThis->IHostAudio.pfnStreamInitAsync = drvHostAudioWasHA_StreamInitAsync;
3182	pThis->IHostAudio.pfnStreamDestroy = drvHostAudioWasHA_StreamDestroy;
3183	pThis->IHostAudio.pfnStreamNotifyDeviceChanged = drvHostAudioWasHA_StreamNotifyDeviceChanged;
3184	pThis->IHostAudio.pfnStreamEnable = drvHostAudioWasHA_StreamEnable;
3185	pThis->IHostAudio.pfnStreamDisable = drvHostAudioWasHA_StreamDisable;
3186	pThis->IHostAudio.pfnStreamPause = drvHostAudioWasHA_StreamPause;
3187	pThis->IHostAudio.pfnStreamResume = drvHostAudioWasHA_StreamResume;
3188	pThis->IHostAudio.pfnStreamDrain = drvHostAudioWasHA_StreamDrain;
3189	pThis->IHostAudio.pfnStreamGetState = drvHostAudioWasHA_StreamGetState;
3190	pThis->IHostAudio.pfnStreamGetPending = drvHostAudioWasHA_StreamGetPending;
3191	pThis->IHostAudio.pfnStreamGetWritable = drvHostAudioWasHA_StreamGetWritable;
3192	pThis->IHostAudio.pfnStreamPlay = drvHostAudioWasHA_StreamPlay;
3193	pThis->IHostAudio.pfnStreamGetReadable = drvHostAudioWasHA_StreamGetReadable;
3194	pThis->IHostAudio.pfnStreamCapture = drvHostAudioWasHA_StreamCapture;
3195
3196	/*
3197	* Validate and read the configuration.
3198	*/
3199	PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "VmName\|VmUuid\|InputDeviceID\|OutputDeviceID", "");
3200
3201	char szTmp[1024];
3202	int rc = pHlp->pfnCFGMQueryStringDef(pCfg, "InputDeviceID", szTmp, sizeof(szTmp), "");
3203	AssertMsgRCReturn(rc, ("Confguration error: Failed to read \"InputDeviceID\" as string: rc=%Rrc\n", rc), rc);
3204	if (szTmp[0])
3205	{
3206	rc = RTStrToUtf16(szTmp, &pThis->pwszInputDevId);
3207	AssertRCReturn(rc, rc);
3208	}
3209
3210	rc = pHlp->pfnCFGMQueryStringDef(pCfg, "OutputDeviceID", szTmp, sizeof(szTmp), "");
3211	AssertMsgRCReturn(rc, ("Confguration error: Failed to read \"OutputDeviceID\" as string: rc=%Rrc\n", rc), rc);
3212	if (szTmp[0])
3213	{
3214	rc = RTStrToUtf16(szTmp, &pThis->pwszOutputDevId);
3215	AssertRCReturn(rc, rc);
3216	}
3217
3218	AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
3219	("Configuration error: Not possible to attach anything to this driver!\n"),
3220	VERR_PDM_DRVINS_NO_ATTACH);
3221
3222	/*
3223	* Initialize the critical sections early.
3224	*/
3225	rc = RTCritSectRwInit(&pThis->CritSectStreamList);
3226	AssertRCReturn(rc, rc);
3227
3228	rc = RTCritSectInit(&pThis->CritSectCache);
3229	AssertRCReturn(rc, rc);
3230
3231	/*
3232	* Create an enumerator instance that we can get the default devices from
3233	* as well as do enumeration thru.
3234	*/
3235	HRESULT hrc = CoCreateInstance(__uuidof(MMDeviceEnumerator), 0, CLSCTX_ALL, __uuidof(IMMDeviceEnumerator),
3236	(void **)&pThis->pIEnumerator);
3237	if (FAILED(hrc))
3238	{
3239	pThis->pIEnumerator = NULL;
3240	LogRel(("WasAPI: Failed to create an MMDeviceEnumerator object: %Rhrc\n", hrc));
3241	return VERR_AUDIO_BACKEND_INIT_FAILED;
3242	}
3243	AssertPtr(pThis->pIEnumerator);
3244
3245	/*
3246	* Resolve the interface to the driver above us.
3247	*/
3248	pThis->pIHostAudioPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIHOSTAUDIOPORT);
3249	AssertPtrReturn(pThis->pIHostAudioPort, VERR_PDM_MISSING_INTERFACE_ABOVE);
3250
3251	/*
3252	* Instantiate and register the notification client with the enumerator.
3253	*
3254	* Failure here isn't considered fatal at this time as we'll just miss
3255	* default device changes.
3256	*/
3257	#ifdef RT_EXCEPTIONS_ENABLED
3258	try { pThis->pNotifyClient = new DrvHostAudioWasMmNotifyClient(pThis); }
3259	catch (std::bad_alloc &) { return VERR_NO_MEMORY; }
3260	#else
3261	pThis->pNotifyClient = new DrvHostAudioWasMmNotifyClient(pThis);
3262	AssertReturn(pThis->pNotifyClient, VERR_NO_MEMORY);
3263	#endif
3264	rc = pThis->pNotifyClient->init();
3265	AssertRCReturn(rc, rc);
3266
3267	hrc = pThis->pIEnumerator->RegisterEndpointNotificationCallback(pThis->pNotifyClient);
3268	AssertMsg(SUCCEEDED(hrc), ("%Rhrc\n", hrc));
3269	if (FAILED(hrc))
3270	{
3271	LogRel(("WasAPI: RegisterEndpointNotificationCallback failed: %Rhrc (ignored)\n"
3272	"WasAPI: Warning! Will not be able to detect default device changes!\n"));
3273	pThis->pNotifyClient->notifyDriverDestroyed();
3274	pThis->pNotifyClient->Release();
3275	pThis->pNotifyClient = NULL;
3276	}
3277
3278	/*
3279	* Retrieve the input and output device.
3280	*/
3281	IMMDevice *pIDeviceInput = NULL;
3282	if (pThis->pwszInputDevId)
3283	hrc = pThis->pIEnumerator->GetDevice(pThis->pwszInputDevId, &pIDeviceInput);
3284	else
3285	hrc = pThis->pIEnumerator->GetDefaultAudioEndpoint(eCapture, eMultimedia, &pIDeviceInput);
3286	if (SUCCEEDED(hrc))
3287	LogFlowFunc(("pIDeviceInput=%p\n", pIDeviceInput));
3288	else
3289	{
3290	LogRel(("WasAPI: Failed to get audio input device '%ls': %Rhrc\n",
3291	pThis->pwszInputDevId ? pThis->pwszInputDevId : L"{Default}", hrc));
3292	pIDeviceInput = NULL;
3293	}
3294
3295	IMMDevice *pIDeviceOutput = NULL;
3296	if (pThis->pwszOutputDevId)
3297	hrc = pThis->pIEnumerator->GetDevice(pThis->pwszOutputDevId, &pIDeviceOutput);
3298	else
3299	hrc = pThis->pIEnumerator->GetDefaultAudioEndpoint(eRender, eMultimedia, &pIDeviceOutput);
3300	if (SUCCEEDED(hrc))
3301	LogFlowFunc(("pIDeviceOutput=%p\n", pIDeviceOutput));
3302	else
3303	{
3304	LogRel(("WasAPI: Failed to get audio output device '%ls': %Rhrc\n",
3305	pThis->pwszOutputDevId ? pThis->pwszOutputDevId : L"{Default}", hrc));
3306	pIDeviceOutput = NULL;
3307	}
3308
3309	/* Carefully place them in the instance data: */
3310	pThis->pNotifyClient->lockEnter();
3311
3312	if (pThis->pIDeviceInput)
3313	pThis->pIDeviceInput->Release();
3314	pThis->pIDeviceInput = pIDeviceInput;
3315
3316	if (pThis->pIDeviceOutput)
3317	pThis->pIDeviceOutput->Release();
3318	pThis->pIDeviceOutput = pIDeviceOutput;
3319
3320	pThis->pNotifyClient->lockLeave();
3321
3322	#if 0
3323	/*
3324	* Create the worker thread. This thread has a message loop and will be
3325	* signalled by DrvHostAudioWasMmNotifyClient while the VM is paused/whatever,
3326	* so better make it a regular thread rather than PDM thread.
3327	*/
3328	pThis->uWorkerThreadFixedParam = (WPARAM)RTRandU64();
3329	rc = RTThreadCreateF(&pThis->hWorkerThread, drvHostWasWorkerThread, pThis, 0 /cbStack/, RTTHREADTYPE_DEFAULT,
3330	RTTHREADFLAGS_WAITABLE \| RTTHREADFLAGS_COM_MTA, "WasWork%u", pDrvIns->iInstance);
3331	AssertRCReturn(rc, rc);
3332
3333	rc = RTThreadUserWait(pThis->hWorkerThread, RT_MS_10SEC);
3334	AssertRC(rc);
3335	#endif
3336
3337	/*
3338	* Prime the cache.
3339	*/
3340	drvHostAudioWasCacheFill(pThis);
3341
3342	return VINF_SUCCESS;
3343	}
3344
3345
3346	/**
3347	* PDM driver registration for WasAPI.
3348	*/
3349	const PDMDRVREG g_DrvHostAudioWas =
3350	{
3351	/* u32Version */
3352	PDM_DRVREG_VERSION,
3353	/* szName */
3354	"HostAudioWas",
3355	/* szRCMod */
3356	"",
3357	/* szR0Mod */
3358	"",
3359	/* pszDescription */
3360	"Windows Audio Session API (WASAPI) host audio driver",
3361	/* fFlags */
3362	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
3363	/* fClass. */
3364	PDM_DRVREG_CLASS_AUDIO,
3365	/* cMaxInstances */
3366	~0U,
3367	/* cbInstance */
3368	sizeof(DRVHOSTAUDIOWAS),
3369	/* pfnConstruct */
3370	drvHostAudioWasConstruct,
3371	/* pfnDestruct */
3372	drvHostAudioWasDestruct,
3373	/* pfnRelocate */
3374	NULL,
3375	/* pfnIOCtl */
3376	NULL,
3377	/* pfnPowerOn */
3378	NULL,
3379	/* pfnReset */
3380	NULL,
3381	/* pfnSuspend */
3382	NULL,
3383	/* pfnResume */
3384	NULL,
3385	/* pfnAttach */
3386	NULL,
3387	/* pfnDetach */
3388	NULL,
3389	/* pfnPowerOff */
3390	drvHostAudioWasPowerOff,
3391	/* pfnSoftReset */
3392	NULL,
3393	/* u32EndVersion */
3394	PDM_DRVREG_VERSION
3395	};
3396

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source: vbox/trunk/src/VBox/Devices/Audio/DrvHostAudioWasApi.cpp@ 102596

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