DrvHostDSound.cpp@ 78271

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Audio/DrvHostDSound: Doxygen fix.
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1	/* $Id: DrvHostDSound.cpp 77031 2019-01-29 13:11:37Z vboxsync $ */
2	/** @file
3	* Windows host backend driver using DirectSound.
4	*/
5
6	/*
7	* Copyright (C) 2006-2019 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
23	#include <VBox/log.h>
24	#include <iprt/win/windows.h>
25	#include <dsound.h>
26
27	#include <iprt/alloc.h>
28	#include <iprt/system.h>
29	#include <iprt/uuid.h>
30	#include <iprt/utf16.h>
31
32	#include "DrvAudio.h"
33	#include "VBoxDD.h"
34	#ifdef VBOX_WITH_AUDIO_MMNOTIFICATION_CLIENT
35	# include <new> /* For bad_alloc. */
36	# include "VBoxMMNotificationClient.h"
37	#endif
38
39
40	/*********************************************************************************************************************************
41	* Defined Constants And Macros *
42	*********************************************************************************************************************************/
43	/*
44	* IDirectSound* interface uses HRESULT status codes and the driver callbacks use
45	* the IPRT status codes. To minimize HRESULT->IPRT conversion most internal functions
46	* in the driver return HRESULT and conversion is done in the driver callbacks.
47	*
48	* Naming convention:
49	* 'dsound*' functions return IPRT status code;
50	* 'directSound*' - return HRESULT.
51	*/
52
53	/*
54	* Optional release logging, which a user can turn on with the
55	* 'VBoxManage debugvm' command.
56	* Debug logging still uses the common Log* macros from IPRT.
57	* Messages which always should go to the release log use LogRel.
58	*/
59	/* General code behavior. */
60	#define DSLOG(a) do { LogRel2(a); } while(0)
61	/* Something which produce a lot of logging during playback/recording. */
62	#define DSLOGF(a) do { LogRel3(a); } while(0)
63	/* Important messages like errors. Limited in the default release log to avoid log flood. */
64	#define DSLOGREL(a) \
65	do { \
66	static int8_t s_cLogged = 0; \
67	if (s_cLogged < 8) { \
68	++s_cLogged; \
69	LogRel(a); \
70	} else DSLOG(a); \
71	} while (0)
72
73	/** Maximum number of attempts to restore the sound buffer before giving up. */
74	#define DRV_DSOUND_RESTORE_ATTEMPTS_MAX 3
75	/** Default input latency (in ms). */
76	#define DRV_DSOUND_DEFAULT_LATENCY_MS_IN 50
77	/** Default output latency (in ms). */
78	#define DRV_DSOUND_DEFAULT_LATENCY_MS_OUT 50
79
80	/** Makes DRVHOSTDSOUND out of PDMIHOSTAUDIO. */
81	#define PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface) \
82	( (PDRVHOSTDSOUND)((uintptr_t)pInterface - RT_UOFFSETOF(DRVHOSTDSOUND, IHostAudio)) )
83
84
85	/*********************************************************************************************************************************
86	* Structures and Typedefs *
87	*********************************************************************************************************************************/
88	/* Dynamically load dsound.dll. */
89	typedef HRESULT WINAPI FNDIRECTSOUNDENUMERATEW(LPDSENUMCALLBACKW pDSEnumCallback, PVOID pContext);
90	typedef FNDIRECTSOUNDENUMERATEW *PFNDIRECTSOUNDENUMERATEW;
91	typedef HRESULT WINAPI FNDIRECTSOUNDCAPTUREENUMERATEW(LPDSENUMCALLBACKW pDSEnumCallback, PVOID pContext);
92	typedef FNDIRECTSOUNDCAPTUREENUMERATEW *PFNDIRECTSOUNDCAPTUREENUMERATEW;
93	typedef HRESULT WINAPI FNDIRECTSOUNDCAPTURECREATE8(LPCGUID lpcGUID, LPDIRECTSOUNDCAPTURE8 *lplpDSC, LPUNKNOWN pUnkOuter);
94	typedef FNDIRECTSOUNDCAPTURECREATE8 *PFNDIRECTSOUNDCAPTURECREATE8;
95
96	#define VBOX_DSOUND_MAX_EVENTS 3
97
98	typedef enum DSOUNDEVENT
99	{
100	DSOUNDEVENT_NOTIFY = 0,
101	DSOUNDEVENT_INPUT,
102	DSOUNDEVENT_OUTPUT,
103	} DSOUNDEVENT;
104
105	typedef struct DSOUNDHOSTCFG
106	{
107	RTUUID uuidPlay;
108	LPCGUID pGuidPlay;
109	RTUUID uuidCapture;
110	LPCGUID pGuidCapture;
111	} DSOUNDHOSTCFG, *PDSOUNDHOSTCFG;
112
113	typedef struct DSOUNDSTREAM
114	{
115	/** The stream's acquired configuration. */
116	PDMAUDIOSTREAMCFG Cfg;
117	/** Buffer alignment. */
118	uint8_t uAlign;
119	/** Whether this stream is in an enable state on the DirectSound side. */
120	bool fEnabled;
121	/** The stream's critical section for synchronizing access. */
122	RTCRITSECT CritSect;
123	/** The internal playback / capturing buffer. */
124	PRTCIRCBUF pCircBuf;
125	/** Size (in bytes) of the DirectSound buffer.
126	* Note: This in not the size of the circular buffer above! */
127	DWORD cbBufSize;
128	union
129	{
130	struct
131	{
132	/** The actual DirectSound Buffer (DSB) used for the capturing.
133	* This is a secondary buffer and is used as a streaming buffer. */
134	LPDIRECTSOUNDCAPTUREBUFFER8 pDSCB;
135	/** Current read offset (in bytes) within the DSB. */
136	DWORD offReadPos;
137	/** Number of buffer overruns happened. Used for logging. */
138	uint8_t cOverruns;
139	} In;
140	struct
141	{
142	/** The actual DirectSound Buffer (DSB) used for playback.
143	* This is a secondary buffer and is used as a streaming buffer. */
144	LPDIRECTSOUNDBUFFER8 pDSB;
145	/** Current write offset (in bytes) within the DSB. */
146	DWORD offWritePos;
147	/** Offset of last play cursor within the DSB when checked for pending. */
148	DWORD offPlayCursorLastPending;
149	/** Offset of last play cursor within the DSB when last played. */
150	DWORD offPlayCursorLastPlayed;
151	/** Total amount (in bytes) written to our internal ring buffer. */
152	uint64_t cbWritten;
153	/** Total amount (in bytes) played (to the DirectSound buffer). */
154	uint64_t cbTransferred;
155	/** Flag indicating whether playback was just (re)started. */
156	bool fFirstTransfer;
157	/** Flag indicating whether this stream is in draining mode, e.g. no new
158	* data is being written to it but DirectSound still needs to be able to
159	* play its remaining (buffered) data. */
160	bool fDrain;
161	/** How much (in bytes) the last transfer from the internal buffer
162	* to the DirectSound buffer was. */
163	uint32_t cbLastTransferred;
164	/** Timestamp (in ms) of the last transfer from the internal buffer
165	* to the DirectSound buffer. */
166	uint64_t tsLastTransferredMs;
167	/** Number of buffer underruns happened. Used for logging. */
168	uint8_t cUnderruns;
169	} Out;
170	};
171	#ifdef LOG_ENABLED
172	struct
173	{
174	uint64_t tsLastTransferredMs;
175	} Dbg;
176	#endif
177	} DSOUNDSTREAM, *PDSOUNDSTREAM;
178
179	/**
180	* Structure for keeping a DirectSound-specific device entry.
181	* This is then bound to the PDMAUDIODEVICE's pvData area.
182	*/
183	typedef struct DSOUNDDEV
184	{
185	GUID Guid;
186	} DSOUNDDEV, *PDSOUNDDEV;
187
188	/**
189	* Structure for holding a device enumeration context.
190	*/
191	typedef struct DSOUNDENUMCBCTX
192	{
193	/** Enumeration flags. */
194	uint32_t fFlags;
195	/** Pointer to device list to populate. */
196	PPDMAUDIODEVICEENUM pDevEnm;
197	} DSOUNDENUMCBCTX, *PDSOUNDENUMCBCTX;
198
199	typedef struct DRVHOSTDSOUND
200	{
201	/** Pointer to the driver instance structure. */
202	PPDMDRVINS pDrvIns;
203	/** Our audio host audio interface. */
204	PDMIHOSTAUDIO IHostAudio;
205	/** Critical section to serialize access. */
206	RTCRITSECT CritSect;
207	/** DirectSound configuration options. */
208	DSOUNDHOSTCFG Cfg;
209	/** List of devices of last enumeration. */
210	PDMAUDIODEVICEENUM DeviceEnum;
211	/** Whether this backend supports any audio input. */
212	bool fEnabledIn;
213	/** Whether this backend supports any audio output. */
214	bool fEnabledOut;
215	/** The Direct Sound playback interface. */
216	LPDIRECTSOUND8 pDS;
217	/** The Direct Sound capturing interface. */
218	LPDIRECTSOUNDCAPTURE8 pDSC;
219	#ifdef VBOX_WITH_AUDIO_MMNOTIFICATION_CLIENT
220	VBoxMMNotificationClient *m_pNotificationClient;
221	#endif
222	#ifdef VBOX_WITH_AUDIO_CALLBACKS
223	/** Callback function to the upper driver.
224	* Can be NULL if not being used / registered. */
225	PFNPDMHOSTAUDIOCALLBACK pfnCallback;
226	#endif
227	/** Pointer to the input stream. */
228	PDSOUNDSTREAM pDSStrmIn;
229	/** Pointer to the output stream. */
230	PDSOUNDSTREAM pDSStrmOut;
231	} DRVHOSTDSOUND, *PDRVHOSTDSOUND;
232
233
234	/*********************************************************************************************************************************
235	* Internal Functions *
236	*********************************************************************************************************************************/
237	static HRESULT directSoundPlayRestore(PDRVHOSTDSOUND pThis, LPDIRECTSOUNDBUFFER8 pDSB);
238	static HRESULT directSoundPlayStart(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS);
239	static HRESULT directSoundPlayStop(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, bool fFlush);
240	static HRESULT directSoundCaptureStop(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, bool fFlush);
241
242	static int dsoundDevicesEnumerate(PDRVHOSTDSOUND pThis, PDMAUDIODEVICEENUM pDevEnm, uint32_t fEnum);
243
244	static int dsoundStreamEnable(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, bool fEnable);
245	static void dsoundStreamReset(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS);
246	static void dsoundUpdateStatusInternal(PDRVHOSTDSOUND pThis);
247
248
249	static DWORD dsoundRingDistance(DWORD offEnd, DWORD offBegin, DWORD cSize)
250	{
251	AssertReturn(offEnd <= cSize, 0);
252	AssertReturn(offBegin <= cSize, 0);
253
254	return offEnd >= offBegin ? offEnd - offBegin : cSize - offBegin + offEnd;
255	}
256
257	static int dsoundWaveFmtFromCfg(PPDMAUDIOSTREAMCFG pCfg, PWAVEFORMATEX pFmt)
258	{
259	AssertPtrReturn(pCfg, VERR_INVALID_POINTER);
260	AssertPtrReturn(pFmt, VERR_INVALID_POINTER);
261
262	RT_BZERO(pFmt, sizeof(WAVEFORMATEX));
263
264	pFmt->wFormatTag = WAVE_FORMAT_PCM;
265	pFmt->nChannels = pCfg->Props.cChannels;
266	pFmt->wBitsPerSample = pCfg->Props.cBytes * 8;
267	pFmt->nSamplesPerSec = pCfg->Props.uHz;
268	pFmt->nBlockAlign = pFmt->nChannels * pFmt->wBitsPerSample / 8;
269	pFmt->nAvgBytesPerSec = pFmt->nSamplesPerSec * pFmt->nBlockAlign;
270	pFmt->cbSize = 0; /* No extra data specified. */
271
272	return VINF_SUCCESS;
273	}
274
275	/**
276	* Retrieves the number of free bytes available for writing to a DirectSound output stream.
277	*
278	* @return IPRT status code. VERR_NOT_AVAILABLE if unable to determine or the buffer was not recoverable.
279	* @param pThis Host audio driver instance.
280	* @param pStreamDS DirectSound output stream to retrieve number for.
281	* @param pdwFree Where to return the free amount on success.
282	*/
283	static int dsoundGetFreeOut(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, DWORD *pdwFree)
284	{
285	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
286	AssertPtrReturn(pStreamDS, VERR_INVALID_POINTER);
287	AssertPtrReturn(pdwFree, VERR_INVALID_POINTER);
288
289	Assert(pStreamDS->Cfg.enmDir == PDMAUDIODIR_OUT); /* Paranoia. */
290
291	LPDIRECTSOUNDBUFFER8 pDSB = pStreamDS->Out.pDSB;
292	if (!pDSB)
293	{
294	AssertPtr(pDSB);
295	return VERR_INVALID_POINTER;
296	}
297
298	HRESULT hr = S_OK;
299
300	/* Get the current play position which is used for calculating the free space in the buffer. */
301	for (unsigned i = 0; i < DRV_DSOUND_RESTORE_ATTEMPTS_MAX; i++)
302	{
303	DWORD cbPlayCursor, cbWriteCursor;
304	hr = IDirectSoundBuffer8_GetCurrentPosition(pDSB, &cbPlayCursor, &cbWriteCursor);
305	if (SUCCEEDED(hr))
306	{
307	int32_t cbDiff = cbWriteCursor - cbPlayCursor;
308	if (cbDiff < 0)
309	cbDiff += pStreamDS->cbBufSize;
310
311	int32_t cbFree = cbPlayCursor - pStreamDS->Out.offWritePos;
312	if (cbFree < 0)
313	cbFree += pStreamDS->cbBufSize;
314
315	if (cbFree > (int32_t)pStreamDS->cbBufSize - cbDiff)
316	{
317	pStreamDS->Out.offWritePos = cbWriteCursor;
318	cbFree = pStreamDS->cbBufSize - cbDiff;
319	}
320
321	/* When starting to use a DirectSound buffer, cbPlayCursor and cbWriteCursor
322	* both point at position 0, so we won't be able to detect how many bytes
323	* are writable that way.
324	*
325	* So use our per-stream written indicator to see if we just started a stream. */
326	if (pStreamDS->Out.cbWritten == 0)
327	cbFree = pStreamDS->cbBufSize;
328
329	DSLOGREL(("DSound: cbPlayCursor=%RU32, cbWriteCursor=%RU32, offWritePos=%RU32 -> cbFree=%RI32\n",
330	cbPlayCursor, cbWriteCursor, pStreamDS->Out.offWritePos, cbFree));
331
332	*pdwFree = cbFree;
333
334	return VINF_SUCCESS;
335	}
336
337	if (hr != DSERR_BUFFERLOST) /** @todo MSDN doesn't state this error for GetCurrentPosition(). */
338	break;
339
340	LogFunc(("Getting playing position failed due to lost buffer, restoring ...\n"));
341
342	directSoundPlayRestore(pThis, pDSB);
343	}
344
345	if (hr != DSERR_BUFFERLOST) /* Avoid log flooding if the error is still there. */
346	DSLOGREL(("DSound: Getting current playback position failed with %Rhrc\n", hr));
347
348	LogFunc(("Failed with %Rhrc\n", hr));
349
350	return VERR_NOT_AVAILABLE;
351	}
352
353	static char *dsoundGUIDToUtf8StrA(LPCGUID pGUID)
354	{
355	if (pGUID)
356	{
357	LPOLESTR lpOLEStr;
358	HRESULT hr = StringFromCLSID(*pGUID, &lpOLEStr);
359	if (SUCCEEDED(hr))
360	{
361	char *pszGUID;
362	int rc = RTUtf16ToUtf8(lpOLEStr, &pszGUID);
363	CoTaskMemFree(lpOLEStr);
364
365	return RT_SUCCESS(rc) ? pszGUID : NULL;
366	}
367	}
368
369	return RTStrDup("{Default device}");
370	}
371
372	static HRESULT directSoundPlayRestore(PDRVHOSTDSOUND pThis, LPDIRECTSOUNDBUFFER8 pDSB)
373	{
374	RT_NOREF(pThis);
375	HRESULT hr = IDirectSoundBuffer8_Restore(pDSB);
376	if (FAILED(hr))
377	DSLOG(("DSound: Restoring playback buffer\n"));
378	else
379	DSLOGREL(("DSound: Restoring playback buffer failed with %Rhrc\n", hr));
380
381	return hr;
382	}
383
384	static HRESULT directSoundPlayUnlock(PDRVHOSTDSOUND pThis, LPDIRECTSOUNDBUFFER8 pDSB,
385	PVOID pv1, PVOID pv2,
386	DWORD cb1, DWORD cb2)
387	{
388	RT_NOREF(pThis);
389	HRESULT hr = IDirectSoundBuffer8_Unlock(pDSB, pv1, cb1, pv2, cb2);
390	if (FAILED(hr))
391	DSLOGREL(("DSound: Unlocking playback buffer failed with %Rhrc\n", hr));
392	return hr;
393	}
394
395	static HRESULT directSoundCaptureUnlock(LPDIRECTSOUNDCAPTUREBUFFER8 pDSCB,
396	PVOID pv1, PVOID pv2,
397	DWORD cb1, DWORD cb2)
398	{
399	HRESULT hr = IDirectSoundCaptureBuffer8_Unlock(pDSCB, pv1, cb1, pv2, cb2);
400	if (FAILED(hr))
401	DSLOGREL(("DSound: Unlocking capture buffer failed with %Rhrc\n", hr));
402	return hr;
403	}
404
405	static HRESULT directSoundPlayLock(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS,
406	DWORD dwOffset, DWORD dwBytes,
407	PVOID ppv1, PVOID ppv2,
408	DWORD pcb1, DWORD pcb2,
409	DWORD dwFlags)
410	{
411	AssertReturn(dwBytes, VERR_INVALID_PARAMETER);
412
413	HRESULT hr = E_FAIL;
414	AssertCompile(DRV_DSOUND_RESTORE_ATTEMPTS_MAX > 0);
415	for (unsigned i = 0; i < DRV_DSOUND_RESTORE_ATTEMPTS_MAX; i++)
416	{
417	PVOID pv1, pv2;
418	DWORD cb1, cb2;
419	hr = IDirectSoundBuffer8_Lock(pStreamDS->Out.pDSB, dwOffset, dwBytes, &pv1, &cb1, &pv2, &cb2, dwFlags);
420	if (SUCCEEDED(hr))
421	{
422	if ( (!pv1 \|\| !(cb1 & pStreamDS->uAlign))
423	&& (!pv2 \|\| !(cb2 & pStreamDS->uAlign)))
424	{
425	if (ppv1)
426	*ppv1 = pv1;
427	if (ppv2)
428	*ppv2 = pv2;
429	if (pcb1)
430	*pcb1 = cb1;
431	if (pcb2)
432	*pcb2 = cb2;
433	return S_OK;
434	}
435	DSLOGREL(("DSound: Locking playback buffer returned misaligned buffer: cb1=%#RX32, cb2=%#RX32 (alignment: %#RX32)\n",
436	pcb1, pcb2, pStreamDS->uAlign));
437	directSoundPlayUnlock(pThis, pStreamDS->Out.pDSB, pv1, pv2, cb1, cb2);
438	return E_FAIL;
439	}
440
441	if (hr != DSERR_BUFFERLOST)
442	break;
443
444	LogFlowFunc(("Locking failed due to lost buffer, restoring ...\n"));
445	directSoundPlayRestore(pThis, pStreamDS->Out.pDSB);
446	}
447
448	DSLOGREL(("DSound: Locking playback buffer failed with %Rhrc (dwOff=%ld, dwBytes=%ld)\n", hr, dwOffset, dwBytes));
449	return hr;
450	}
451
452	static HRESULT directSoundCaptureLock(PDSOUNDSTREAM pStreamDS,
453	DWORD dwOffset, DWORD dwBytes,
454	PVOID ppv1, PVOID ppv2,
455	DWORD pcb1, DWORD pcb2,
456	DWORD dwFlags)
457	{
458	PVOID pv1 = NULL;
459	PVOID pv2 = NULL;
460	DWORD cb1 = 0;
461	DWORD cb2 = 0;
462
463	HRESULT hr = IDirectSoundCaptureBuffer8_Lock(pStreamDS->In.pDSCB, dwOffset, dwBytes,
464	&pv1, &cb1, &pv2, &cb2, dwFlags);
465	if (FAILED(hr))
466	{
467	DSLOGREL(("DSound: Locking capture buffer failed with %Rhrc\n", hr));
468	return hr;
469	}
470
471	if ( (pv1 && (cb1 & pStreamDS->uAlign))
472	\|\| (pv2 && (cb2 & pStreamDS->uAlign)))
473	{
474	DSLOGREL(("DSound: Locking capture buffer returned misaligned buffer: cb1=%RI32, cb2=%RI32 (alignment: %RU32)\n",
475	cb1, cb2, pStreamDS->uAlign));
476	directSoundCaptureUnlock(pStreamDS->In.pDSCB, pv1, pv2, cb1, cb2);
477	return E_FAIL;
478	}
479
480	*ppv1 = pv1;
481	*ppv2 = pv2;
482	*pcb1 = cb1;
483	*pcb2 = cb2;
484
485	return S_OK;
486	}
487
488	/*
489	* DirectSound playback
490	*/
491
492	/**
493	* Destroys a DirectSound playback interface.
494	*
495	* @param pDS Playback interface to destroy.
496	*/
497	static void directSoundPlayInterfaceDestroy(LPDIRECTSOUND8 pDS)
498	{
499	if (pDS)
500	{
501	LogFlowFuncEnter();
502
503	IDirectSound8_Release(pDS);
504	pDS = NULL;
505	}
506	}
507
508	/**
509	* Creates a DirectSound playback interface.
510	*
511	* @return HRESULT
512	* @param pGUID GUID of device to create the playback interface for.
513	* @param ppDS Where to store the created interface. Optional.
514	*/
515	static HRESULT directSoundPlayInterfaceCreate(LPCGUID pGUID, LPDIRECTSOUND8 *ppDS)
516	{
517	/* pGUID can be NULL, if this is the default device. */
518	/* ppDS is optional. */
519
520	LogFlowFuncEnter();
521
522	LPDIRECTSOUND8 pDS;
523	HRESULT hr = CoCreateInstance(CLSID_DirectSound8, NULL, CLSCTX_ALL,
524	IID_IDirectSound8, (void **)&pDS);
525	if (FAILED(hr))
526	{
527	DSLOGREL(("DSound: Creating playback instance failed with %Rhrc\n", hr));
528	}
529	else
530	{
531	hr = IDirectSound8_Initialize(pDS, pGUID);
532	if (SUCCEEDED(hr))
533	{
534	HWND hWnd = GetDesktopWindow();
535	hr = IDirectSound8_SetCooperativeLevel(pDS, hWnd, DSSCL_PRIORITY);
536	if (FAILED(hr))
537	DSLOGREL(("DSound: Setting cooperative level for window %p failed with %Rhrc\n", hWnd, hr));
538	}
539
540	if (FAILED(hr))
541	{
542	if (hr == DSERR_NODRIVER) /* Usually means that no playback devices are attached. */
543	DSLOGREL(("DSound: DirectSound playback is currently unavailable\n"));
544	else
545	DSLOGREL(("DSound: DirectSound playback initialization failed with %Rhrc\n", hr));
546
547	directSoundPlayInterfaceDestroy(pDS);
548	}
549	else if (ppDS)
550	{
551	*ppDS = pDS;
552	}
553	}
554
555	LogFlowFunc(("Returning %Rhrc\n", hr));
556	return hr;
557	}
558
559	static HRESULT directSoundPlayClose(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
560	{
561	AssertPtrReturn(pThis, E_POINTER);
562	AssertPtrReturn(pStreamDS, E_POINTER);
563
564	LogFlowFuncEnter();
565
566	HRESULT hr = directSoundPlayStop(pThis, pStreamDS, true /* fFlush */);
567	if (FAILED(hr))
568	return hr;
569
570	DSLOG(("DSound: Closing playback stream\n"));
571
572	if (pStreamDS->pCircBuf)
573	Assert(RTCircBufUsed(pStreamDS->pCircBuf) == 0);
574
575	if (SUCCEEDED(hr))
576	{
577	RTCritSectEnter(&pThis->CritSect);
578
579	if (pStreamDS->pCircBuf)
580	{
581	RTCircBufDestroy(pStreamDS->pCircBuf);
582	pStreamDS->pCircBuf = NULL;
583	}
584
585	if (pStreamDS->Out.pDSB)
586	{
587	IDirectSoundBuffer8_Release(pStreamDS->Out.pDSB);
588	pStreamDS->Out.pDSB = NULL;
589	}
590
591	pThis->pDSStrmOut = NULL;
592
593	RTCritSectLeave(&pThis->CritSect);
594	}
595
596	if (FAILED(hr))
597	DSLOGREL(("DSound: Stopping playback stream %p failed with %Rhrc\n", pStreamDS, hr));
598
599	return hr;
600	}
601
602	static HRESULT directSoundPlayOpen(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS,
603	PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
604	{
605	AssertPtrReturn(pThis, E_POINTER);
606	AssertPtrReturn(pStreamDS, E_POINTER);
607	AssertPtrReturn(pCfgReq, E_POINTER);
608	AssertPtrReturn(pCfgAcq, E_POINTER);
609
610	LogFlowFuncEnter();
611
612	Assert(pStreamDS->Out.pDSB == NULL);
613
614	DSLOG(("DSound: Opening playback stream (uHz=%RU32, cChannels=%RU8, cBits=%RU8, fSigned=%RTbool)\n",
615	pCfgReq->Props.uHz,
616	pCfgReq->Props.cChannels,
617	pCfgReq->Props.cBytes * 8,
618	pCfgReq->Props.fSigned));
619
620	WAVEFORMATEX wfx;
621	int rc = dsoundWaveFmtFromCfg(pCfgReq, &wfx);
622	if (RT_FAILURE(rc))
623	return E_INVALIDARG;
624
625	DSLOG(("DSound: Requested playback format:\n"
626	" wFormatTag = %RI16\n"
627	" nChannels = %RI16\n"
628	" nSamplesPerSec = %RU32\n"
629	" nAvgBytesPerSec = %RU32\n"
630	" nBlockAlign = %RI16\n"
631	" wBitsPerSample = %RI16\n"
632	" cbSize = %RI16\n",
633	wfx.wFormatTag,
634	wfx.nChannels,
635	wfx.nSamplesPerSec,
636	wfx.nAvgBytesPerSec,
637	wfx.nBlockAlign,
638	wfx.wBitsPerSample,
639	wfx.cbSize));
640
641	dsoundUpdateStatusInternal(pThis);
642
643	HRESULT hr = directSoundPlayInterfaceCreate(pThis->Cfg.pGuidPlay, &pThis->pDS);
644	if (FAILED(hr))
645	return hr;
646
647	do /* To use breaks. */
648	{
649	LPDIRECTSOUNDBUFFER pDSB = NULL;
650
651	DSBUFFERDESC bd;
652	RT_ZERO(bd);
653	bd.dwSize = sizeof(bd);
654	bd.lpwfxFormat = &wfx;
655
656	/*
657	* As we reuse our (secondary) buffer for playing out data as it comes in,
658	* we're using this buffer as a so-called streaming buffer.
659	*
660	* See https://msdn.microsoft.com/en-us/library/windows/desktop/ee419014(v=vs.85).aspx
661	*
662	* However, as we do not want to use memory on the sound device directly
663	* (as most modern audio hardware on the host doesn't have this anyway),
664	* we're not going to use DSBCAPS_STATIC for that.
665	*
666	* Instead we're specifying DSBCAPS_LOCSOFTWARE, as this fits the bill
667	* of copying own buffer data to our secondary's Direct Sound buffer.
668	*/
669	bd.dwFlags = DSBCAPS_GLOBALFOCUS \| DSBCAPS_GETCURRENTPOSITION2 \| DSBCAPS_LOCSOFTWARE;
670	bd.dwBufferBytes = DrvAudioHlpFramesToBytes(pCfgReq->Backend.cfBufferSize, &pCfgReq->Props);
671
672	DSLOG(("DSound: Requested playback buffer is %RU64ms (%ld bytes)\n",
673	DrvAudioHlpBytesToMilli(bd.dwBufferBytes, &pCfgReq->Props), bd.dwBufferBytes));
674
675	hr = IDirectSound8_CreateSoundBuffer(pThis->pDS, &bd, &pDSB, NULL);
676	if (FAILED(hr))
677	{
678	DSLOGREL(("DSound: Creating playback sound buffer failed with %Rhrc\n", hr));
679	break;
680	}
681
682	/* "Upgrade" to IDirectSoundBuffer8 interface. */
683	hr = IDirectSoundBuffer_QueryInterface(pDSB, IID_IDirectSoundBuffer8, (PVOID *)&pStreamDS->Out.pDSB);
684	IDirectSoundBuffer_Release(pDSB);
685	if (FAILED(hr))
686	{
687	DSLOGREL(("DSound: Querying playback sound buffer interface failed with %Rhrc\n", hr));
688	break;
689	}
690
691	/*
692	* Query the actual parameters set for this stream.
693	* Those might be different than the initially requested parameters.
694	*/
695	RT_ZERO(wfx);
696	hr = IDirectSoundBuffer8_GetFormat(pStreamDS->Out.pDSB, &wfx, sizeof(wfx), NULL);
697	if (FAILED(hr))
698	{
699	DSLOGREL(("DSound: Getting playback format failed with %Rhrc\n", hr));
700	break;
701	}
702
703	DSBCAPS bc;
704	RT_ZERO(bc);
705	bc.dwSize = sizeof(bc);
706
707	hr = IDirectSoundBuffer8_GetCaps(pStreamDS->Out.pDSB, &bc);
708	if (FAILED(hr))
709	{
710	DSLOGREL(("DSound: Getting playback capabilities failed with %Rhrc\n", hr));
711	break;
712	}
713
714	DSLOG(("DSound: Acquired playback buffer is %RU64ms (%ld bytes)\n",
715	DrvAudioHlpBytesToMilli(bc.dwBufferBytes, &pCfgReq->Props), bc.dwBufferBytes));
716
717	DSLOG(("DSound: Acquired playback format:\n"
718	" dwBufferBytes = %RI32\n"
719	" dwFlags = 0x%x\n"
720	" wFormatTag = %RI16\n"
721	" nChannels = %RI16\n"
722	" nSamplesPerSec = %RU32\n"
723	" nAvgBytesPerSec = %RU32\n"
724	" nBlockAlign = %RI16\n"
725	" wBitsPerSample = %RI16\n"
726	" cbSize = %RI16\n",
727	bc.dwBufferBytes,
728	bc.dwFlags,
729	wfx.wFormatTag,
730	wfx.nChannels,
731	wfx.nSamplesPerSec,
732	wfx.nAvgBytesPerSec,
733	wfx.nBlockAlign,
734	wfx.wBitsPerSample,
735	wfx.cbSize));
736
737	if (bc.dwBufferBytes & pStreamDS->uAlign)
738	DSLOGREL(("DSound: Playback capabilities returned misaligned buffer: size %RU32, alignment %RU32\n",
739	bc.dwBufferBytes, pStreamDS->uAlign + 1));
740
741	/*
742	* Initial state.
743	* dsoundPlayStart initializes part of it to make sure that Stop/Start continues with a correct
744	* playback buffer position.
745	*/
746	pStreamDS->cbBufSize = bc.dwBufferBytes;
747
748	rc = RTCircBufCreate(&pStreamDS->pCircBuf, pStreamDS->cbBufSize) * 2; /* Use "double buffering" */
749	AssertRC(rc);
750
751	pThis->pDSStrmOut = pStreamDS;
752
753	const uint32_t cfBufSize = PDMAUDIOSTREAMCFG_B2F(pCfgAcq, pStreamDS->cbBufSize);
754
755	pCfgAcq->Backend.cfBufferSize = cfBufSize;
756	pCfgAcq->Backend.cfPeriod = cfBufSize / 4;
757	pCfgAcq->Backend.cfPreBuf = pCfgAcq->Backend.cfPeriod * 2;
758
759	} while (0);
760
761	if (FAILED(hr))
762	directSoundPlayClose(pThis, pStreamDS);
763
764	return hr;
765	}
766
767	static void dsoundPlayClearBuffer(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
768	{
769	AssertPtrReturnVoid(pStreamDS);
770
771	PPDMAUDIOPCMPROPS pProps = &pStreamDS->Cfg.Props;
772
773	HRESULT hr = IDirectSoundBuffer_SetCurrentPosition(pStreamDS->Out.pDSB, 0 /* Position */);
774	if (FAILED(hr))
775	DSLOGREL(("DSound: Setting current position to 0 when clearing buffer failed with %Rhrc\n", hr));
776
777	PVOID pv1;
778	hr = directSoundPlayLock(pThis, pStreamDS,
779	0 /* dwOffset */, pStreamDS->cbBufSize,
780	&pv1, NULL, 0, 0, DSBLOCK_ENTIREBUFFER);
781	if (SUCCEEDED(hr))
782	{
783	DrvAudioHlpClearBuf(pProps, pv1, pStreamDS->cbBufSize, PDMAUDIOPCMPROPS_B2F(pProps, pStreamDS->cbBufSize));
784
785	directSoundPlayUnlock(pThis, pStreamDS->Out.pDSB, pv1, NULL, 0, 0);
786
787	/* Make sure to get the last playback position and current write position from DirectSound again.
788	* Those positions in theory could have changed, re-fetch them to be sure. */
789	hr = IDirectSoundBuffer_GetCurrentPosition(pStreamDS->Out.pDSB,
790	&pStreamDS->Out.offPlayCursorLastPlayed, &pStreamDS->Out.offWritePos);
791	if (FAILED(hr))
792	DSLOGREL(("DSound: Re-fetching current position when clearing buffer failed with %Rhrc\n", hr));
793	}
794	}
795
796	/**
797	* Transfers audio data from the internal buffer to the DirectSound playback instance.
798	* Due to internal accounting and querying DirectSound, this function knows how much it can transfer at once.
799	*
800	* @return IPRT status code.
801	* @param pThis Host audio driver instance.
802	* @param pStreamDS Stream to transfer playback data for.
803	*/
804	static int dsoundPlayTransfer(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
805	{
806	if (!pStreamDS->fEnabled)
807	{
808	Log2Func(("Stream disabled, skipping\n"));
809	return VINF_SUCCESS;
810	}
811
812	uint32_t cbTransferred = 0;
813
814	PRTCIRCBUF pCircBuf = pStreamDS->pCircBuf;
815	AssertPtr(pCircBuf);
816
817	LPDIRECTSOUNDBUFFER8 pDSB = pStreamDS->Out.pDSB;
818	AssertPtr(pDSB);
819
820	int rc = VINF_SUCCESS;
821
822	DWORD offPlayCursor, offWriteCursor;
823	HRESULT hr = IDirectSoundBuffer8_GetCurrentPosition(pDSB, &offPlayCursor, &offWriteCursor);
824	if (FAILED(hr))
825	{
826	rc = VERR_ACCESS_DENIED; /** @todo Find a better rc. */
827	return rc;
828	}
829
830	DWORD cbFree, cbRemaining;
831	if (pStreamDS->Out.fFirstTransfer)
832	{
833	cbRemaining = 0;
834	cbFree = pStreamDS->cbBufSize;
835	}
836	else
837	{
838	cbFree = dsoundRingDistance(offPlayCursor, pStreamDS->Out.offWritePos, pStreamDS->cbBufSize);
839	cbRemaining = dsoundRingDistance(pStreamDS->Out.offWritePos, offPlayCursor, pStreamDS->cbBufSize);
840	}
841
842	uint32_t cbAvail = (uint32_t)RTCircBufUsed(pCircBuf);
843	uint32_t cbToTransfer = RT_MIN(cbFree, cbAvail);
844
845	#ifdef LOG_ENABLED
846	if (!pStreamDS->Dbg.tsLastTransferredMs)
847	pStreamDS->Dbg.tsLastTransferredMs = RTTimeMilliTS();
848	Log3Func(("offPlay=%RU32, offWrite=%RU32, tsLastTransferredMs=%RU64ms, cbAvail=%RU32, cbFree=%RU32 -> cbToTransfer=%RU32 "
849	"(fFirst=%RTbool, fDrain=%RTbool)\n",
850	offPlayCursor, offWriteCursor, RTTimeMilliTS() - pStreamDS->Dbg.tsLastTransferredMs, cbAvail, cbFree, cbToTransfer,
851	pStreamDS->Out.fFirstTransfer, pStreamDS->Out.fDrain));
852	pStreamDS->Dbg.tsLastTransferredMs = RTTimeMilliTS();
853	#endif
854
855	while (cbToTransfer)
856	{
857	DWORD cb1 = 0;
858	DWORD cb2 = 0;
859
860	void *pvBuf;
861	size_t cbBuf;
862	RTCircBufAcquireReadBlock(pCircBuf, cbToTransfer, &pvBuf, &cbBuf);
863
864	if (cbBuf)
865	{
866	PVOID pv1, pv2;
867	hr = directSoundPlayLock(pThis, pStreamDS, pStreamDS->Out.offWritePos, (DWORD)cbBuf,
868	&pv1, &pv2, &cb1, &cb2, 0 /* dwFlags */);
869	if (FAILED(hr))
870	{
871	rc = VERR_ACCESS_DENIED;
872	break;
873	}
874
875	AssertPtr(pv1);
876	Assert(cb1);
877
878	memcpy(pv1, pvBuf, cb1);
879
880	if (pv2 && cb2) /* Buffer wrap-around? Write second part. */
881	memcpy(pv2, (uint8_t *)pvBuf + cb1, cb2);
882
883	directSoundPlayUnlock(pThis, pDSB, pv1, pv2, cb1, cb2);
884
885	pStreamDS->Out.offWritePos = (pStreamDS->Out.offWritePos + cb1 + cb2) % pStreamDS->cbBufSize;
886
887	Assert(cbToTransfer >= cbBuf);
888	cbToTransfer -= (uint32_t)cbBuf;
889
890	cbTransferred += cb1 + cb2;
891	}
892
893	RTCircBufReleaseReadBlock(pCircBuf, cb1 + cb2);
894	}
895
896	pStreamDS->Out.cbTransferred += cbTransferred;
897
898	if ( pStreamDS->Out.fFirstTransfer
899	&& pStreamDS->Out.cbTransferred >= DrvAudioHlpFramesToBytes(pStreamDS->Cfg.Backend.cfPreBuf, &pStreamDS->Cfg.Props))
900	{
901	hr = directSoundPlayStart(pThis, pStreamDS);
902	if (SUCCEEDED(hr))
903	{
904	pStreamDS->Out.fFirstTransfer = false;
905	}
906	else
907	rc = VERR_ACCESS_DENIED; /** @todo Find a better rc. */
908	}
909
910	cbAvail = (uint32_t)RTCircBufUsed(pCircBuf);
911	if ( !cbAvail
912	&& cbTransferred)
913	{
914	pStreamDS->Out.cbLastTransferred = cbTransferred;
915	pStreamDS->Out.tsLastTransferredMs = RTTimeMilliTS();
916
917	LogFlowFunc(("cbLastTransferred=%RU32, tsLastTransferredMs=%RU64\n",
918	pStreamDS->Out.cbLastTransferred, pStreamDS->Out.tsLastTransferredMs));
919	}
920
921	LogFlowFunc(("cbTransferred=%RU32, cbAvail=%RU32, rc=%Rrc\n", cbTransferred, cbAvail, rc));
922	return rc;
923	}
924
925	static HRESULT directSoundPlayGetStatus(PDRVHOSTDSOUND pThis, LPDIRECTSOUNDBUFFER8 pDSB, DWORD *pdwStatus)
926	{
927	AssertPtrReturn(pThis, E_POINTER);
928	AssertPtrReturn(pDSB, E_POINTER);
929
930	AssertPtrNull(pdwStatus);
931
932	DWORD dwStatus = 0;
933	HRESULT hr = E_FAIL;
934	for (unsigned i = 0; i < DRV_DSOUND_RESTORE_ATTEMPTS_MAX; i++)
935	{
936	hr = IDirectSoundBuffer8_GetStatus(pDSB, &dwStatus);
937	if ( hr == DSERR_BUFFERLOST
938	\|\| ( SUCCEEDED(hr)
939	&& (dwStatus & DSBSTATUS_BUFFERLOST)))
940	{
941	LogFlowFunc(("Getting status failed due to lost buffer, restoring ...\n"));
942	directSoundPlayRestore(pThis, pDSB);
943	}
944	else
945	break;
946	}
947
948	if (SUCCEEDED(hr))
949	{
950	if (pdwStatus)
951	*pdwStatus = dwStatus;
952	}
953	else
954	DSLOGREL(("DSound: Retrieving playback status failed with %Rhrc\n", hr));
955
956	return hr;
957	}
958
959	static HRESULT directSoundPlayStop(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, bool fFlush)
960	{
961	AssertPtrReturn(pThis, E_POINTER);
962	AssertPtrReturn(pStreamDS, E_POINTER);
963
964	HRESULT hr = S_OK;
965
966	if (pStreamDS->Out.pDSB)
967	{
968	DSLOG(("DSound: Stopping playback\n"));
969	hr = IDirectSoundBuffer8_Stop(pStreamDS->Out.pDSB);
970	if (FAILED(hr))
971	{
972	hr = directSoundPlayRestore(pThis, pStreamDS->Out.pDSB);
973	if (FAILED(hr))
974	hr = IDirectSoundBuffer8_Stop(pStreamDS->Out.pDSB);
975	}
976	}
977
978	if (SUCCEEDED(hr))
979	{
980	if (fFlush)
981	dsoundStreamReset(pThis, pStreamDS);
982	}
983
984	if (FAILED(hr))
985	DSLOGREL(("DSound: %s playback failed with %Rhrc\n", fFlush ? "Stopping" : "Pausing", hr));
986
987	return hr;
988	}
989
990	/**
991	* Enables or disables a stream.
992	*
993	* @return IPRT status code.
994	* @param pThis Host audio driver instance.
995	* @param pStreamDS Stream to enable / disable.
996	* @param fEnable Whether to enable or disable the stream.
997	*/
998	static int dsoundStreamEnable(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, bool fEnable)
999	{
1000	RT_NOREF(pThis);
1001
1002	LogFunc(("%s %s\n",
1003	fEnable ? "Enabling" : "Disabling",
1004	pStreamDS->Cfg.enmDir == PDMAUDIODIR_IN ? "capture" : "playback"));
1005
1006	if (fEnable)
1007	dsoundStreamReset(pThis, pStreamDS);
1008
1009	pStreamDS->fEnabled = fEnable;
1010
1011	return VINF_SUCCESS;
1012	}
1013
1014
1015	/**
1016	* Resets the state of a DirectSound stream.
1017	*
1018	* @param pThis Host audio driver instance.
1019	* @param pStreamDS Stream to reset state for.
1020	*/
1021	static void dsoundStreamReset(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
1022	{
1023	RT_NOREF(pThis);
1024
1025	LogFunc(("Resetting %s\n",
1026	pStreamDS->Cfg.enmDir == PDMAUDIODIR_IN ? "capture" : "playback"));
1027
1028	if (pStreamDS->pCircBuf)
1029	RTCircBufReset(pStreamDS->pCircBuf);
1030
1031	if (pStreamDS->Cfg.enmDir == PDMAUDIODIR_IN)
1032	{
1033	pStreamDS->In.offReadPos = 0;
1034	pStreamDS->In.cOverruns = 0;
1035
1036	/* Also reset the DirectSound Capture Buffer (DSCB) by clearing all data to make sure
1037	* not stale audio data is left. */
1038	if (pStreamDS->In.pDSCB)
1039	{
1040	PVOID pv1; PVOID pv2; DWORD cb1; DWORD cb2;
1041	HRESULT hr = directSoundCaptureLock(pStreamDS, 0 /* Offset */, pStreamDS->cbBufSize, &pv1, &pv2, &cb1, &cb2,
1042	0 /* Flags */);
1043	if (SUCCEEDED(hr))
1044	{
1045	DrvAudioHlpClearBuf(&pStreamDS->Cfg.Props, pv1, cb1, PDMAUDIOPCMPROPS_B2F(&pStreamDS->Cfg.Props, cb1));
1046	if (pv2 && cb2)
1047	DrvAudioHlpClearBuf(&pStreamDS->Cfg.Props, pv2, cb2, PDMAUDIOPCMPROPS_B2F(&pStreamDS->Cfg.Props, cb2));
1048	directSoundCaptureUnlock(pStreamDS->In.pDSCB, pv1, pv2, cb1, cb2);
1049	}
1050	}
1051	}
1052	else if (pStreamDS->Cfg.enmDir == PDMAUDIODIR_OUT)
1053	{
1054	pStreamDS->Out.fFirstTransfer = true;
1055	pStreamDS->Out.fDrain = false;
1056	pStreamDS->Out.cUnderruns = 0;
1057
1058	pStreamDS->Out.cbLastTransferred = 0;
1059	pStreamDS->Out.tsLastTransferredMs = 0;
1060
1061	pStreamDS->Out.cbTransferred = 0;
1062	pStreamDS->Out.cbWritten = 0;
1063
1064	pStreamDS->Out.offWritePos = 0;
1065	pStreamDS->Out.offPlayCursorLastPending = 0;
1066	pStreamDS->Out.offPlayCursorLastPlayed = 0;
1067
1068	/* Also reset the DirectSound Buffer (DSB) by setting the position to 0 and clear all data to make sure
1069	* not stale audio data is left. */
1070	if (pStreamDS->Out.pDSB)
1071	{
1072	HRESULT hr = IDirectSoundBuffer8_SetCurrentPosition(pStreamDS->Out.pDSB, 0);
1073	if (SUCCEEDED(hr))
1074	{
1075	PVOID pv1; PVOID pv2; DWORD cb1; DWORD cb2;
1076	hr = directSoundPlayLock(pThis, pStreamDS, 0 /* Offset */, pStreamDS->cbBufSize, &pv1, &pv2, &cb1, &cb2,
1077	0 /* Flags */);
1078	if (SUCCEEDED(hr))
1079	{
1080	DrvAudioHlpClearBuf(&pStreamDS->Cfg.Props, pv1, cb1, PDMAUDIOPCMPROPS_B2F(&pStreamDS->Cfg.Props, cb1));
1081	if (pv2 && cb2)
1082	DrvAudioHlpClearBuf(&pStreamDS->Cfg.Props, pv2, cb2, PDMAUDIOPCMPROPS_B2F(&pStreamDS->Cfg.Props, cb2));
1083	directSoundPlayUnlock(pThis, pStreamDS->Out.pDSB, pv1, pv2, cb1, cb2);
1084	}
1085	}
1086	}
1087	}
1088
1089	#ifdef LOG_ENABLED
1090	pStreamDS->Dbg.tsLastTransferredMs = 0;
1091	#endif
1092	}
1093
1094
1095	/**
1096	* Starts playing a DirectSound stream.
1097	*
1098	* @return HRESULT
1099	* @param pThis Host audio driver instance.
1100	* @param pStreamDS Stream to start playing.
1101	*/
1102	static HRESULT directSoundPlayStart(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
1103	{
1104	HRESULT hr = S_OK;
1105
1106	DWORD fFlags = DSCBSTART_LOOPING;
1107
1108	for (unsigned i = 0; i < DRV_DSOUND_RESTORE_ATTEMPTS_MAX; i++)
1109	{
1110	DSLOG(("DSound: Starting playback\n"));
1111	hr = IDirectSoundBuffer8_Play(pStreamDS->Out.pDSB, 0, 0, fFlags);
1112	if ( SUCCEEDED(hr)
1113	\|\| hr != DSERR_BUFFERLOST)
1114	break;
1115	else
1116	{
1117	LogFunc(("Restarting playback failed due to lost buffer, restoring ...\n"));
1118	directSoundPlayRestore(pThis, pStreamDS->Out.pDSB);
1119	}
1120	}
1121
1122	return hr;
1123	}
1124
1125
1126	/*
1127	* DirectSoundCapture
1128	*/
1129
1130	static LPCGUID dsoundCaptureSelectDevice(PDRVHOSTDSOUND pThis, PPDMAUDIOSTREAMCFG pCfg)
1131	{
1132	AssertPtrReturn(pThis, NULL);
1133	AssertPtrReturn(pCfg, NULL);
1134
1135	int rc = VINF_SUCCESS;
1136
1137	LPCGUID pGUID = pThis->Cfg.pGuidCapture;
1138	if (!pGUID)
1139	{
1140	PPDMAUDIODEVICE pDev = NULL;
1141
1142	switch (pCfg->DestSource.Source)
1143	{
1144	case PDMAUDIORECSOURCE_LINE:
1145	/*
1146	* At the moment we're only supporting line-in in the HDA emulation,
1147	* and line-in + mic-in in the AC'97 emulation both are expected
1148	* to use the host's mic-in as well.
1149	*
1150	* So the fall through here is intentional for now.
1151	*/
1152	case PDMAUDIORECSOURCE_MIC:
1153	{
1154	pDev = DrvAudioHlpDeviceEnumGetDefaultDevice(&pThis->DeviceEnum, PDMAUDIODIR_IN);
1155	break;
1156	}
1157
1158	default:
1159	AssertFailedStmt(rc = VERR_NOT_SUPPORTED);
1160	break;
1161	}
1162
1163	if ( RT_SUCCESS(rc)
1164	&& pDev)
1165	{
1166	DSLOG(("DSound: Guest source '%s' is using host recording device '%s'\n",
1167	DrvAudioHlpRecSrcToStr(pCfg->DestSource.Source), pDev->szName));
1168
1169	PDSOUNDDEV pDSoundDev = (PDSOUNDDEV )pDev->pvData;
1170	AssertPtr(pDSoundDev);
1171
1172	pGUID = &pDSoundDev->Guid;
1173	}
1174	}
1175
1176	if (RT_FAILURE(rc))
1177	{
1178	LogRel(("DSound: Selecting recording device failed with %Rrc\n", rc));
1179	return NULL;
1180	}
1181
1182	char *pszGUID = dsoundGUIDToUtf8StrA(pGUID);
1183
1184	/* This always has to be in the release log. */
1185	LogRel(("DSound: Guest source '%s' is using host recording device with GUID '%s'\n",
1186	DrvAudioHlpRecSrcToStr(pCfg->DestSource.Source), pszGUID ? pszGUID: "{?}"));
1187
1188	if (pszGUID)
1189	{
1190	RTStrFree(pszGUID);
1191	pszGUID = NULL;
1192	}
1193
1194	return pGUID;
1195	}
1196
1197	/**
1198	* Transfers audio data from the DirectSound capture instance to the internal buffer.
1199	* Due to internal accounting and querying DirectSound, this function knows how much it can transfer at once.
1200	*
1201	* @return IPRT status code.
1202	* @param pThis Host audio driver instance.
1203	* @param pStreamDS Stream to capture audio data for.
1204	*/
1205	static int dsoundCaptureTransfer(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
1206	{
1207	RT_NOREF(pThis);
1208
1209	LPDIRECTSOUNDCAPTUREBUFFER8 pDSCB = pStreamDS->In.pDSCB;
1210	AssertPtr(pDSCB);
1211
1212	DWORD offCaptureCursor;
1213	HRESULT hr = IDirectSoundCaptureBuffer_GetCurrentPosition(pDSCB, NULL, &offCaptureCursor);
1214	if (FAILED(hr))
1215	{
1216	AssertFailed();
1217	return VERR_ACCESS_DENIED; /** @todo Find a better rc. */
1218	}
1219
1220	DWORD cbUsed = dsoundRingDistance(offCaptureCursor, pStreamDS->In.offReadPos, pStreamDS->cbBufSize);
1221
1222	PRTCIRCBUF pCircBuf = pStreamDS->pCircBuf;
1223	AssertPtr(pCircBuf);
1224
1225	uint32_t cbFree = (uint32_t)RTCircBufFree(pCircBuf);
1226	if ( !cbFree
1227	\|\| pStreamDS->In.cOverruns < 32) /** @todo Make this configurable. */
1228	{
1229	DSLOG(("DSound: Warning: Capture buffer full, skipping to record data (%RU32 bytes)\n", cbUsed));
1230	pStreamDS->In.cOverruns++;
1231	}
1232
1233	DWORD cbToCapture = RT_MIN(cbUsed, cbFree);
1234
1235	Log3Func(("cbUsed=%ld, cbToCapture=%ld\n", cbUsed, cbToCapture));
1236
1237	while (cbToCapture)
1238	{
1239	void *pvBuf;
1240	size_t cbBuf;
1241	RTCircBufAcquireWriteBlock(pCircBuf, cbToCapture, &pvBuf, &cbBuf);
1242
1243	if (cbBuf)
1244	{
1245	PVOID pv1, pv2;
1246	DWORD cb1, cb2;
1247	hr = directSoundCaptureLock(pStreamDS, pStreamDS->In.offReadPos, (DWORD)cbBuf,
1248	&pv1, &pv2, &cb1, &cb2, 0 /* dwFlags */);
1249	if (FAILED(hr))
1250	break;
1251
1252	AssertPtr(pv1);
1253	Assert(cb1);
1254
1255	memcpy(pvBuf, pv1, cb1);
1256
1257	if (pv2 && cb2) /* Buffer wrap-around? Write second part. */
1258	memcpy((uint8_t *)pvBuf + cb1, pv2, cb2);
1259
1260	directSoundCaptureUnlock(pDSCB, pv1, pv2, cb1, cb2);
1261
1262	pStreamDS->In.offReadPos = (pStreamDS->In.offReadPos + cb1 + cb2) % pStreamDS->cbBufSize;
1263
1264	Assert(cbToCapture >= cbBuf);
1265	cbToCapture -= (uint32_t)cbBuf;
1266	}
1267
1268	#ifdef VBOX_AUDIO_DEBUG_DUMP_PCM_DATA
1269	if (cbBuf)
1270	{
1271	RTFILE fh;
1272	int rc2 = RTFileOpen(&fh, VBOX_AUDIO_DEBUG_DUMP_PCM_DATA_PATH "dsoundCapture.pcm",
1273	RTFILE_O_OPEN_CREATE \| RTFILE_O_APPEND \| RTFILE_O_WRITE \| RTFILE_O_DENY_NONE);
1274	if (RT_SUCCESS(rc2))
1275	{
1276	RTFileWrite(fh, pvBuf, cbBuf, NULL);
1277	RTFileClose(fh);
1278	}
1279	}
1280	#endif
1281	RTCircBufReleaseWriteBlock(pCircBuf, cbBuf);
1282	}
1283
1284	return VINF_SUCCESS;
1285	}
1286
1287	/**
1288	* Destroys a DirectSound capture interface.
1289	*
1290	* @param pDSC Capture interface to destroy.
1291	*/
1292	static void directSoundCaptureInterfaceDestroy(LPDIRECTSOUNDCAPTURE8 pDSC)
1293	{
1294	if (pDSC)
1295	{
1296	LogFlowFuncEnter();
1297
1298	IDirectSoundCapture_Release(pDSC);
1299	pDSC = NULL;
1300	}
1301	}
1302
1303	/**
1304	* Creates a DirectSound capture interface.
1305	*
1306	* @return HRESULT
1307	* @param pGUID GUID of device to create the capture interface for.
1308	* @param ppDSC Where to store the created interface. Optional.
1309	*/
1310	static HRESULT directSoundCaptureInterfaceCreate(LPCGUID pGUID, LPDIRECTSOUNDCAPTURE8 *ppDSC)
1311	{
1312	/* pGUID can be NULL, if this is the default device. */
1313	/* ppDSC is optional. */
1314
1315	LogFlowFuncEnter();
1316
1317	LPDIRECTSOUNDCAPTURE8 pDSC;
1318	HRESULT hr = CoCreateInstance(CLSID_DirectSoundCapture8, NULL, CLSCTX_ALL,
1319	IID_IDirectSoundCapture8, (void **)&pDSC);
1320	if (FAILED(hr))
1321	{
1322	DSLOGREL(("DSound: Creating capture instance failed with %Rhrc\n", hr));
1323	}
1324	else
1325	{
1326	hr = IDirectSoundCapture_Initialize(pDSC, pGUID);
1327	if (FAILED(hr))
1328	{
1329	if (hr == DSERR_NODRIVER) /* Usually means that no capture devices are attached. */
1330	DSLOGREL(("DSound: Capture device currently is unavailable\n"));
1331	else
1332	DSLOGREL(("DSound: Initializing capturing device failed with %Rhrc\n", hr));
1333
1334	directSoundCaptureInterfaceDestroy(pDSC);
1335	}
1336	else if (ppDSC)
1337	{
1338	*ppDSC = pDSC;
1339	}
1340	}
1341
1342	LogFlowFunc(("Returning %Rhrc\n", hr));
1343	return hr;
1344	}
1345
1346	static HRESULT directSoundCaptureClose(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
1347	{
1348	AssertPtrReturn(pThis, E_POINTER);
1349	AssertPtrReturn(pStreamDS, E_POINTER);
1350
1351	LogFlowFuncEnter();
1352
1353	HRESULT hr = directSoundCaptureStop(pThis, pStreamDS, true /* fFlush */);
1354	if (FAILED(hr))
1355	return hr;
1356
1357	if ( pStreamDS
1358	&& pStreamDS->In.pDSCB)
1359	{
1360	DSLOG(("DSound: Closing capturing stream\n"));
1361
1362	IDirectSoundCaptureBuffer8_Release(pStreamDS->In.pDSCB);
1363	pStreamDS->In.pDSCB = NULL;
1364	}
1365
1366	LogFlowFunc(("Returning %Rhrc\n", hr));
1367	return hr;
1368	}
1369
1370	static HRESULT directSoundCaptureOpen(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS,
1371	PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
1372	{
1373	AssertPtrReturn(pThis, E_POINTER);
1374	AssertPtrReturn(pStreamDS, E_POINTER);
1375	AssertPtrReturn(pCfgReq, E_POINTER);
1376	AssertPtrReturn(pCfgAcq, E_POINTER);
1377
1378	LogFlowFuncEnter();
1379
1380	Assert(pStreamDS->In.pDSCB == NULL);
1381
1382	DSLOG(("DSound: Opening capturing stream (uHz=%RU32, cChannels=%RU8, cBits=%RU8, fSigned=%RTbool)\n",
1383	pCfgReq->Props.uHz,
1384	pCfgReq->Props.cChannels,
1385	pCfgReq->Props.cBytes * 8,
1386	pCfgReq->Props.fSigned));
1387
1388	WAVEFORMATEX wfx;
1389	int rc = dsoundWaveFmtFromCfg(pCfgReq, &wfx);
1390	if (RT_FAILURE(rc))
1391	return E_INVALIDARG;
1392
1393	dsoundUpdateStatusInternal(pThis);
1394
1395	HRESULT hr = directSoundCaptureInterfaceCreate(pThis->Cfg.pGuidCapture, &pThis->pDSC);
1396	if (FAILED(hr))
1397	return hr;
1398
1399	do /* To use breaks. */
1400	{
1401	DSCBUFFERDESC bd;
1402	RT_ZERO(bd);
1403
1404	bd.dwSize = sizeof(bd);
1405	bd.lpwfxFormat = &wfx;
1406	bd.dwBufferBytes = DrvAudioHlpFramesToBytes(pCfgReq->Backend.cfBufferSize, &pCfgReq->Props);
1407
1408	DSLOG(("DSound: Requested capture buffer is %RU64ms (%ld bytes)\n",
1409	DrvAudioHlpBytesToMilli(bd.dwBufferBytes, &pCfgReq->Props), bd.dwBufferBytes));
1410
1411	LPDIRECTSOUNDCAPTUREBUFFER pDSCB;
1412	hr = IDirectSoundCapture_CreateCaptureBuffer(pThis->pDSC, &bd, &pDSCB, NULL);
1413	if (FAILED(hr))
1414	{
1415	if (hr == E_ACCESSDENIED)
1416	{
1417	DSLOGREL(("DSound: Capturing input from host not possible, access denied\n"));
1418	}
1419	else
1420	DSLOGREL(("DSound: Creating capture buffer failed with %Rhrc\n", hr));
1421	break;
1422	}
1423
1424	hr = IDirectSoundCaptureBuffer_QueryInterface(pDSCB, IID_IDirectSoundCaptureBuffer8, (void **)&pStreamDS->In.pDSCB);
1425	IDirectSoundCaptureBuffer_Release(pDSCB);
1426	if (FAILED(hr))
1427	{
1428	DSLOGREL(("DSound: Querying interface for capture buffer failed with %Rhrc\n", hr));
1429	break;
1430	}
1431
1432	/*
1433	* Query the actual parameters.
1434	*/
1435	DWORD offByteReadPos = 0;
1436	hr = IDirectSoundCaptureBuffer8_GetCurrentPosition(pStreamDS->In.pDSCB, NULL, &offByteReadPos);
1437	if (FAILED(hr))
1438	{
1439	offByteReadPos = 0;
1440	DSLOGREL(("DSound: Getting capture position failed with %Rhrc\n", hr));
1441	}
1442
1443	RT_ZERO(wfx);
1444	hr = IDirectSoundCaptureBuffer8_GetFormat(pStreamDS->In.pDSCB, &wfx, sizeof(wfx), NULL);
1445	if (FAILED(hr))
1446	{
1447	DSLOGREL(("DSound: Getting capture format failed with %Rhrc\n", hr));
1448	break;
1449	}
1450
1451	DSCBCAPS bc;
1452	RT_ZERO(bc);
1453	bc.dwSize = sizeof(bc);
1454	hr = IDirectSoundCaptureBuffer8_GetCaps(pStreamDS->In.pDSCB, &bc);
1455	if (FAILED(hr))
1456	{
1457	DSLOGREL(("DSound: Getting capture capabilities failed with %Rhrc\n", hr));
1458	break;
1459	}
1460
1461	DSLOG(("DSound: Acquired capture buffer is %RU64ms (%ld bytes)\n",
1462	DrvAudioHlpBytesToMilli(bc.dwBufferBytes, &pCfgReq->Props), bc.dwBufferBytes));
1463
1464	DSLOG(("DSound: Capture format:\n"
1465	" dwBufferBytes = %RI32\n"
1466	" dwFlags = 0x%x\n"
1467	" wFormatTag = %RI16\n"
1468	" nChannels = %RI16\n"
1469	" nSamplesPerSec = %RU32\n"
1470	" nAvgBytesPerSec = %RU32\n"
1471	" nBlockAlign = %RI16\n"
1472	" wBitsPerSample = %RI16\n"
1473	" cbSize = %RI16\n",
1474	bc.dwBufferBytes,
1475	bc.dwFlags,
1476	wfx.wFormatTag,
1477	wfx.nChannels,
1478	wfx.nSamplesPerSec,
1479	wfx.nAvgBytesPerSec,
1480	wfx.nBlockAlign,
1481	wfx.wBitsPerSample,
1482	wfx.cbSize));
1483
1484	if (bc.dwBufferBytes & pStreamDS->uAlign)
1485	DSLOGREL(("DSound: Capture GetCaps returned misaligned buffer: size %RU32, alignment %RU32\n",
1486	bc.dwBufferBytes, pStreamDS->uAlign + 1));
1487
1488	/* Initial state: reading at the initial capture position, no error. */
1489	pStreamDS->In.offReadPos = 0;
1490	pStreamDS->cbBufSize = bc.dwBufferBytes;
1491
1492	rc = RTCircBufCreate(&pStreamDS->pCircBuf, pStreamDS->cbBufSize) * 2; /* Use "double buffering". */
1493	AssertRC(rc);
1494
1495	pThis->pDSStrmIn = pStreamDS;
1496
1497	pCfgAcq->Backend.cfBufferSize = PDMAUDIOSTREAMCFG_B2F(pCfgAcq, pStreamDS->cbBufSize);
1498
1499	} while (0);
1500
1501	if (FAILED(hr))
1502	directSoundCaptureClose(pThis, pStreamDS);
1503
1504	LogFlowFunc(("Returning %Rhrc\n", hr));
1505	return hr;
1506	}
1507
1508	static HRESULT directSoundCaptureStop(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, bool fFlush)
1509	{
1510	AssertPtrReturn(pThis, E_POINTER);
1511	AssertPtrReturn(pStreamDS, E_POINTER);
1512
1513	RT_NOREF(pThis);
1514
1515	HRESULT hr = S_OK;
1516
1517	if (pStreamDS->In.pDSCB)
1518	{
1519	DSLOG(("DSound: Stopping capture\n"));
1520	hr = IDirectSoundCaptureBuffer_Stop(pStreamDS->In.pDSCB);
1521	}
1522
1523	if (SUCCEEDED(hr))
1524	{
1525	if (fFlush)
1526	dsoundStreamReset(pThis, pStreamDS);
1527	}
1528
1529	if (FAILED(hr))
1530	DSLOGREL(("DSound: Stopping capture buffer failed with %Rhrc\n", hr));
1531
1532	return hr;
1533	}
1534
1535	static HRESULT directSoundCaptureStart(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
1536	{
1537	AssertPtrReturn(pThis, E_POINTER);
1538	AssertPtrReturn(pStreamDS, E_POINTER);
1539
1540	HRESULT hr;
1541	if (pStreamDS->In.pDSCB)
1542	{
1543	DWORD dwStatus;
1544	hr = IDirectSoundCaptureBuffer8_GetStatus(pStreamDS->In.pDSCB, &dwStatus);
1545	if (FAILED(hr))
1546	{
1547	DSLOGREL(("DSound: Retrieving capture status failed with %Rhrc\n", hr));
1548	}
1549	else
1550	{
1551	if (dwStatus & DSCBSTATUS_CAPTURING)
1552	{
1553	DSLOG(("DSound: Already capturing\n"));
1554	}
1555	else
1556	{
1557	const DWORD fFlags = DSCBSTART_LOOPING;
1558
1559	DSLOG(("DSound: Starting to capture\n"));
1560	hr = IDirectSoundCaptureBuffer8_Start(pStreamDS->In.pDSCB, fFlags);
1561	if (FAILED(hr))
1562	DSLOGREL(("DSound: Starting to capture failed with %Rhrc\n", hr));
1563	}
1564	}
1565	}
1566	else
1567	hr = E_UNEXPECTED;
1568
1569	LogFlowFunc(("Returning %Rhrc\n", hr));
1570	return hr;
1571	}
1572
1573	/**
1574	* Callback for the playback device enumeration.
1575	*
1576	* @return TRUE if continuing enumeration, FALSE if not.
1577	* @param pGUID Pointer to GUID of enumerated device. Can be NULL.
1578	* @param pwszDescription Pointer to (friendly) description of enumerated device.
1579	* @param pwszModule Pointer to module name of enumerated device.
1580	* @param lpContext Pointer to PDSOUNDENUMCBCTX context for storing the enumerated information.
1581	*/
1582	static BOOL CALLBACK dsoundDevicesEnumCbPlayback(LPGUID pGUID, LPCWSTR pwszDescription, LPCWSTR pwszModule, PVOID lpContext)
1583	{
1584	RT_NOREF(pwszModule);
1585
1586	PDSOUNDENUMCBCTX pEnumCtx = (PDSOUNDENUMCBCTX)lpContext;
1587	AssertPtrReturn(pEnumCtx , FALSE);
1588
1589	PPDMAUDIODEVICEENUM pDevEnm = pEnumCtx->pDevEnm;
1590	AssertPtrReturn(pDevEnm, FALSE);
1591
1592	/* pGUID can be NULL for default device(s). */
1593	AssertPtrReturn(pwszDescription, FALSE);
1594	/* Do not care about pwszModule. */
1595
1596	int rc;
1597
1598	PPDMAUDIODEVICE pDev = DrvAudioHlpDeviceAlloc(sizeof(DSOUNDDEV));
1599	if (pDev)
1600	{
1601	pDev->enmUsage = PDMAUDIODIR_OUT;
1602	pDev->enmType = PDMAUDIODEVICETYPE_BUILTIN;
1603
1604	if (pGUID == NULL)
1605	pDev->fFlags = PDMAUDIODEV_FLAGS_DEFAULT;
1606
1607	char *pszName;
1608	rc = RTUtf16ToUtf8(pwszDescription, &pszName);
1609	if (RT_SUCCESS(rc))
1610	{
1611	RTStrCopy(pDev->szName, sizeof(pDev->szName), pszName);
1612	RTStrFree(pszName);
1613
1614	PDSOUNDDEV pDSoundDev = (PDSOUNDDEV)pDev->pvData;
1615
1616	if (pGUID)
1617	memcpy(&pDSoundDev->Guid, pGUID, sizeof(GUID));
1618
1619	LPDIRECTSOUND8 pDS;
1620	HRESULT hr = directSoundPlayInterfaceCreate(pGUID, &pDS);
1621	if (SUCCEEDED(hr))
1622	{
1623	do
1624	{
1625	DSCAPS DSCaps;
1626	RT_ZERO(DSCaps);
1627	DSCaps.dwSize = sizeof(DSCAPS);
1628	hr = IDirectSound_GetCaps(pDS, &DSCaps);
1629	if (FAILED(hr))
1630	break;
1631
1632	pDev->cMaxOutputChannels = DSCaps.dwFlags & DSCAPS_PRIMARYSTEREO ? 2 : 1;
1633
1634	DWORD dwSpeakerCfg;
1635	hr = IDirectSound_GetSpeakerConfig(pDS, &dwSpeakerCfg);
1636	if (FAILED(hr))
1637	break;
1638
1639	unsigned uSpeakerCount = 0;
1640	switch (DSSPEAKER_CONFIG(dwSpeakerCfg))
1641	{
1642	case DSSPEAKER_MONO: uSpeakerCount = 1; break;
1643	case DSSPEAKER_HEADPHONE: uSpeakerCount = 2; break;
1644	case DSSPEAKER_STEREO: uSpeakerCount = 2; break;
1645	case DSSPEAKER_QUAD: uSpeakerCount = 4; break;
1646	case DSSPEAKER_SURROUND: uSpeakerCount = 4; break;
1647	case DSSPEAKER_5POINT1: uSpeakerCount = 6; break;
1648	case DSSPEAKER_5POINT1_SURROUND: uSpeakerCount = 6; break;
1649	case DSSPEAKER_7POINT1: uSpeakerCount = 8; break;
1650	case DSSPEAKER_7POINT1_SURROUND: uSpeakerCount = 8; break;
1651	default: break;
1652	}
1653
1654	if (uSpeakerCount) /* Do we need to update the channel count? */
1655	pDev->cMaxOutputChannels = uSpeakerCount;
1656
1657	} while (0);
1658
1659	directSoundPlayInterfaceDestroy(pDS);
1660
1661	rc = VINF_SUCCESS;
1662	}
1663	else
1664	rc = VERR_GENERAL_FAILURE;
1665
1666	if (RT_SUCCESS(rc))
1667	rc = DrvAudioHlpDeviceEnumAdd(pDevEnm, pDev);
1668	}
1669	}
1670	else
1671	rc = VERR_NO_MEMORY;
1672
1673	if (RT_FAILURE(rc))
1674	{
1675	LogRel(("DSound: Error enumeration playback device '%ls', rc=%Rrc\n", pwszDescription, rc));
1676	return FALSE; /* Abort enumeration. */
1677	}
1678
1679	return TRUE;
1680	}
1681
1682	/**
1683	* Callback for the capture device enumeration.
1684	*
1685	* @return TRUE if continuing enumeration, FALSE if not.
1686	* @param pGUID Pointer to GUID of enumerated device. Can be NULL.
1687	* @param pwszDescription Pointer to (friendly) description of enumerated device.
1688	* @param pwszModule Pointer to module name of enumerated device.
1689	* @param lpContext Pointer to PDSOUNDENUMCBCTX context for storing the enumerated information.
1690	*/
1691	static BOOL CALLBACK dsoundDevicesEnumCbCapture(LPGUID pGUID, LPCWSTR pwszDescription, LPCWSTR pwszModule, PVOID lpContext)
1692	{
1693	RT_NOREF(pwszModule);
1694
1695	PDSOUNDENUMCBCTX pEnumCtx = (PDSOUNDENUMCBCTX )lpContext;
1696	AssertPtrReturn(pEnumCtx , FALSE);
1697
1698	PPDMAUDIODEVICEENUM pDevEnm = pEnumCtx->pDevEnm;
1699	AssertPtrReturn(pDevEnm, FALSE);
1700
1701	/* pGUID can be NULL for default device(s). */
1702	AssertPtrReturn(pwszDescription, FALSE);
1703	/* Do not care about pwszModule. */
1704
1705	int rc;
1706
1707	PPDMAUDIODEVICE pDev = DrvAudioHlpDeviceAlloc(sizeof(DSOUNDDEV));
1708	if (pDev)
1709	{
1710	pDev->enmUsage = PDMAUDIODIR_IN;
1711	pDev->enmType = PDMAUDIODEVICETYPE_BUILTIN;
1712
1713	char *pszName;
1714	rc = RTUtf16ToUtf8(pwszDescription, &pszName);
1715	if (RT_SUCCESS(rc))
1716	{
1717	RTStrCopy(pDev->szName, sizeof(pDev->szName), pszName);
1718	RTStrFree(pszName);
1719
1720	PDSOUNDDEV pDSoundDev = (PDSOUNDDEV)pDev->pvData;
1721
1722	if (pGUID)
1723	memcpy(&pDSoundDev->Guid, pGUID, sizeof(GUID));
1724
1725	LPDIRECTSOUNDCAPTURE8 pDSC;
1726	HRESULT hr = directSoundCaptureInterfaceCreate(pGUID, &pDSC);
1727	if (SUCCEEDED(hr))
1728	{
1729	do
1730	{
1731	DSCCAPS DSCCaps;
1732	RT_ZERO(DSCCaps);
1733	DSCCaps.dwSize = sizeof(DSCCAPS);
1734	hr = IDirectSoundCapture_GetCaps(pDSC, &DSCCaps);
1735	if (FAILED(hr))
1736	break;
1737
1738	pDev->cMaxInputChannels = DSCCaps.dwChannels;
1739
1740	} while (0);
1741
1742	directSoundCaptureInterfaceDestroy(pDSC);
1743
1744	rc = VINF_SUCCESS;
1745	}
1746	else
1747	rc = VERR_GENERAL_FAILURE;
1748
1749	if (RT_SUCCESS(rc))
1750	rc = DrvAudioHlpDeviceEnumAdd(pDevEnm, pDev);
1751	}
1752	}
1753	else
1754	rc = VERR_NO_MEMORY;
1755
1756	if (RT_FAILURE(rc))
1757	{
1758	LogRel(("DSound: Error enumeration capture device '%ls', rc=%Rrc\n", pwszDescription, rc));
1759	return FALSE; /* Abort enumeration. */
1760	}
1761
1762	return TRUE;
1763	}
1764
1765	/**
1766	* Does a (Re-)enumeration of the host's playback + capturing devices.
1767	*
1768	* @return IPRT status code.
1769	* @param pThis Host audio driver instance.
1770	* @param pDevEnm Where to store the enumerated devices.
1771	*/
1772	static int dsoundDevicesEnumerate(PDRVHOSTDSOUND pThis, PPDMAUDIODEVICEENUM pDevEnm)
1773	{
1774	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
1775
1776	DSLOG(("DSound: Enumerating devices ...\n"));
1777
1778	RTLDRMOD hDSound = NULL;
1779	int rc = RTLdrLoadSystem("dsound.dll", true /fNoUnload/, &hDSound);
1780	if (RT_SUCCESS(rc))
1781	{
1782	DSOUNDENUMCBCTX EnumCtx;
1783	EnumCtx.fFlags = 0;
1784	EnumCtx.pDevEnm = pDevEnm;
1785
1786	PFNDIRECTSOUNDENUMERATEW pfnDirectSoundEnumerateW = NULL;
1787	rc = RTLdrGetSymbol(hDSound, "DirectSoundEnumerateW", (void**)&pfnDirectSoundEnumerateW);
1788	if (RT_SUCCESS(rc))
1789	{
1790	HRESULT hr = pfnDirectSoundEnumerateW(&dsoundDevicesEnumCbPlayback, &EnumCtx);
1791	if (FAILED(hr))
1792	LogRel(("DSound: Error enumerating host playback devices: %Rhrc\n", hr));
1793	}
1794	else
1795	LogRel(("DSound: Error starting to enumerate host playback devices: %Rrc\n", rc));
1796
1797	PFNDIRECTSOUNDCAPTUREENUMERATEW pfnDirectSoundCaptureEnumerateW = NULL;
1798	rc = RTLdrGetSymbol(hDSound, "DirectSoundCaptureEnumerateW", (void**)&pfnDirectSoundCaptureEnumerateW);
1799	if (RT_SUCCESS(rc))
1800	{
1801	HRESULT hr = pfnDirectSoundCaptureEnumerateW(&dsoundDevicesEnumCbCapture, &EnumCtx);
1802	if (FAILED(hr))
1803	LogRel(("DSound: Error enumerating host capture devices: %Rhrc\n", hr));
1804	}
1805	else
1806	LogRel(("DSound: Error starting to enumerate host capture devices: %Rrc\n", rc));
1807
1808	RTLdrClose(hDSound);
1809	}
1810	else
1811	{
1812	/* No dsound.dll on this system. */
1813	LogRel(("DSound: Could not load dsound.dll: %Rrc\n", rc));
1814	}
1815
1816	DSLOG(("DSound: Enumerating devices done\n"));
1817
1818	return rc;
1819	}
1820
1821	/**
1822	* Updates this host driver's internal status, according to the global, overall input/output
1823	* state and all connected (native) audio streams.
1824	*
1825	* @param pThis Host audio driver instance.
1826	*/
1827	static void dsoundUpdateStatusInternal(PDRVHOSTDSOUND pThis)
1828	{
1829	AssertPtrReturnVoid(pThis);
1830	/* pCfg is optional. */
1831
1832	LogFlowFuncEnter();
1833
1834	int rc = dsoundDevicesEnumerate(pThis, &pThis->DeviceEnum);
1835	if (RT_SUCCESS(rc))
1836	{
1837	#if 0
1838	if ( pThis->fEnabledOut != RT_BOOL(cbCtx.cDevOut)
1839	\|\| pThis->fEnabledIn != RT_BOOL(cbCtx.cDevIn))
1840	{
1841	/** @todo Use a registered callback to the audio connector (e.g "OnConfigurationChanged") to
1842	* let the connector know that something has changed within the host backend. */
1843	}
1844	#endif
1845	pThis->fEnabledIn = RT_BOOL(DrvAudioHlpDeviceEnumGetDeviceCount(&pThis->DeviceEnum, PDMAUDIODIR_IN));
1846	pThis->fEnabledOut = RT_BOOL(DrvAudioHlpDeviceEnumGetDeviceCount(&pThis->DeviceEnum, PDMAUDIODIR_OUT));
1847	}
1848
1849	LogFlowFuncLeaveRC(rc);
1850	}
1851
1852	static int dsoundCreateStreamOut(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS,
1853	PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
1854	{
1855	LogFlowFunc(("pStreamDS=%p, pCfgReq=%p\n", pStreamDS, pCfgReq));
1856
1857	int rc = VINF_SUCCESS;
1858
1859	/* Try to open playback in case the device is already there. */
1860	HRESULT hr = directSoundPlayOpen(pThis, pStreamDS, pCfgReq, pCfgAcq);
1861	if (SUCCEEDED(hr))
1862	{
1863	rc = DrvAudioHlpStreamCfgCopy(&pStreamDS->Cfg, pCfgAcq);
1864	if (RT_SUCCESS(rc))
1865	dsoundStreamReset(pThis, pStreamDS);
1866	}
1867	else
1868	rc = VERR_AUDIO_STREAM_COULD_NOT_CREATE;
1869
1870	LogFlowFuncLeaveRC(rc);
1871	return rc;
1872	}
1873
1874	static int dsoundControlStreamOut(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, PDMAUDIOSTREAMCMD enmStreamCmd)
1875	{
1876	LogFlowFunc(("pStreamDS=%p, cmd=%d\n", pStreamDS, enmStreamCmd));
1877
1878	int rc = VINF_SUCCESS;
1879
1880	HRESULT hr;
1881	switch (enmStreamCmd)
1882	{
1883	case PDMAUDIOSTREAMCMD_ENABLE:
1884	{
1885	dsoundStreamEnable(pThis, pStreamDS, true /* fEnable */);
1886	break;
1887	}
1888
1889	case PDMAUDIOSTREAMCMD_RESUME:
1890	{
1891	hr = directSoundPlayStart(pThis, pStreamDS);
1892	if (FAILED(hr))
1893	rc = VERR_NOT_SUPPORTED; /** @todo Fix this. */
1894	break;
1895	}
1896
1897	case PDMAUDIOSTREAMCMD_DISABLE:
1898	{
1899	dsoundStreamEnable(pThis, pStreamDS, false /* fEnable */);
1900	hr = directSoundPlayStop(pThis, pStreamDS, true /* fFlush */);
1901	if (FAILED(hr))
1902	rc = VERR_NOT_SUPPORTED;
1903	break;
1904	}
1905
1906	case PDMAUDIOSTREAMCMD_PAUSE:
1907	{
1908	hr = directSoundPlayStop(pThis, pStreamDS, false /* fFlush */);
1909	if (FAILED(hr))
1910	rc = VERR_NOT_SUPPORTED;
1911	break;
1912	}
1913
1914	case PDMAUDIOSTREAMCMD_DRAIN:
1915	{
1916	/* Make sure we transferred everything. */
1917	pStreamDS->fEnabled = true;
1918	pStreamDS->Out.fDrain = true;
1919	rc = dsoundPlayTransfer(pThis, pStreamDS);
1920	if ( RT_SUCCESS(rc)
1921	&& pStreamDS->Out.fFirstTransfer)
1922	{
1923	/* If this was the first transfer ever for this stream, make sure to also play the (short) audio data. */
1924	DSLOG(("DSound: Started playing output (short sound)\n"));
1925
1926	pStreamDS->Out.fFirstTransfer = false;
1927	pStreamDS->Out.cbLastTransferred = pStreamDS->Out.cbTransferred; /* All transferred audio data must be played. */
1928	pStreamDS->Out.tsLastTransferredMs = RTTimeMilliTS();
1929
1930	hr = directSoundPlayStart(pThis, pStreamDS);
1931	if (FAILED(hr))
1932	rc = VERR_ACCESS_DENIED; /** @todo Find a better rc. */
1933	}
1934	break;
1935	}
1936
1937	case PDMAUDIOSTREAMCMD_DROP:
1938	{
1939	pStreamDS->Out.cbLastTransferred = 0;
1940	pStreamDS->Out.tsLastTransferredMs = 0;
1941	RTCircBufReset(pStreamDS->pCircBuf);
1942	break;
1943	}
1944
1945	default:
1946	rc = VERR_NOT_SUPPORTED;
1947	break;
1948	}
1949
1950	LogFlowFuncLeaveRC(rc);
1951	return rc;
1952	}
1953
1954	/**
1955	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPlay}
1956	*/
1957	int drvHostDSoundStreamPlay(PPDMIHOSTAUDIO pInterface,
1958	PPDMAUDIOBACKENDSTREAM pStream, const void pvBuf, uint32_t cxBuf, uint32_t pcxWritten)
1959	{
1960	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
1961	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
1962	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
1963	AssertReturn(cxBuf, VERR_INVALID_PARAMETER);
1964	/* pcxWritten is optional. */
1965
1966	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
1967	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
1968
1969	int rc = VINF_SUCCESS;
1970
1971	uint32_t cbWrittenTotal = 0;
1972
1973	uint8_t pbBuf = (uint8_t )pvBuf;
1974	PRTCIRCBUF pCircBuf = pStreamDS->pCircBuf;
1975
1976	uint32_t cbToPlay = RT_MIN(cxBuf, (uint32_t)RTCircBufFree(pCircBuf));
1977	while (cbToPlay)
1978	{
1979	void *pvChunk;
1980	size_t cbChunk;
1981	RTCircBufAcquireWriteBlock(pCircBuf, cbToPlay, &pvChunk, &cbChunk);
1982
1983	if (cbChunk)
1984	{
1985	memcpy(pvChunk, pbBuf, cbChunk);
1986
1987	pbBuf += cbChunk;
1988	Assert(cbToPlay >= cbChunk);
1989	cbToPlay -= (uint32_t)cbChunk;
1990
1991	cbWrittenTotal += (uint32_t)cbChunk;
1992	}
1993
1994	RTCircBufReleaseWriteBlock(pCircBuf, cbChunk);
1995	}
1996
1997	Assert(cbWrittenTotal <= cxBuf);
1998	Assert(cbWrittenTotal == cxBuf);
1999
2000	pStreamDS->Out.cbWritten += cbWrittenTotal;
2001
2002	if (RT_SUCCESS(rc))
2003	{
2004	if (pcxWritten)
2005	*pcxWritten = cbWrittenTotal;
2006	}
2007	else
2008	dsoundUpdateStatusInternal(pThis);
2009
2010	return rc;
2011	}
2012
2013	static int dsoundDestroyStreamOut(PDRVHOSTDSOUND pThis, PPDMAUDIOBACKENDSTREAM pStream)
2014	{
2015	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2016
2017	LogFlowFuncEnter();
2018
2019	HRESULT hr = directSoundPlayStop(pThis, pStreamDS, true /* fFlush */);
2020	if (SUCCEEDED(hr))
2021	{
2022	hr = directSoundPlayClose(pThis, pStreamDS);
2023	if (FAILED(hr))
2024	return VERR_GENERAL_FAILURE; /** @todo Fix. */
2025	}
2026
2027	return VINF_SUCCESS;
2028	}
2029
2030	static int dsoundCreateStreamIn(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS,
2031	PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
2032	{
2033	LogFunc(("pStreamDS=%p, pCfgReq=%p, enmRecSource=%s\n",
2034	pStreamDS, pCfgReq, DrvAudioHlpRecSrcToStr(pCfgReq->DestSource.Source)));
2035
2036	int rc = VINF_SUCCESS;
2037
2038	/* Try to open capture in case the device is already there. */
2039	HRESULT hr = directSoundCaptureOpen(pThis, pStreamDS, pCfgReq, pCfgAcq);
2040	if (SUCCEEDED(hr))
2041	{
2042	rc = DrvAudioHlpStreamCfgCopy(&pStreamDS->Cfg, pCfgAcq);
2043	if (RT_SUCCESS(rc))
2044	dsoundStreamReset(pThis, pStreamDS);
2045	}
2046	else
2047	rc = VERR_AUDIO_STREAM_COULD_NOT_CREATE;
2048
2049	return rc;
2050	}
2051
2052	static int dsoundControlStreamIn(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS, PDMAUDIOSTREAMCMD enmStreamCmd)
2053	{
2054	LogFlowFunc(("pStreamDS=%p, enmStreamCmd=%ld\n", pStreamDS, enmStreamCmd));
2055
2056	int rc = VINF_SUCCESS;
2057
2058	HRESULT hr;
2059	switch (enmStreamCmd)
2060	{
2061	case PDMAUDIOSTREAMCMD_ENABLE:
2062	dsoundStreamEnable(pThis, pStreamDS, true /* fEnable */);
2063	RT_FALL_THROUGH();
2064	case PDMAUDIOSTREAMCMD_RESUME:
2065	{
2066	/* Try to start capture. If it fails, then reopen and try again. */
2067	hr = directSoundCaptureStart(pThis, pStreamDS);
2068	if (FAILED(hr))
2069	{
2070	hr = directSoundCaptureClose(pThis, pStreamDS);
2071	if (SUCCEEDED(hr))
2072	{
2073	PDMAUDIOSTREAMCFG CfgAcq;
2074	hr = directSoundCaptureOpen(pThis, pStreamDS, &pStreamDS->Cfg /* pCfgReq */, &CfgAcq);
2075	if (SUCCEEDED(hr))
2076	{
2077	rc = DrvAudioHlpStreamCfgCopy(&pStreamDS->Cfg, &CfgAcq);
2078	if (RT_FAILURE(rc))
2079	break;
2080
2081	/** @todo What to do if the format has changed? */
2082
2083	hr = directSoundCaptureStart(pThis, pStreamDS);
2084	}
2085	}
2086	}
2087
2088	if (FAILED(hr))
2089	rc = VERR_NOT_SUPPORTED;
2090	break;
2091	}
2092
2093	case PDMAUDIOSTREAMCMD_DISABLE:
2094	dsoundStreamEnable(pThis, pStreamDS, false /* fEnable */);
2095	RT_FALL_THROUGH();
2096	case PDMAUDIOSTREAMCMD_PAUSE:
2097	{
2098	directSoundCaptureStop(pThis, pStreamDS,
2099	enmStreamCmd == PDMAUDIOSTREAMCMD_DISABLE /* fFlush */);
2100
2101	/* Return success in any case, as stopping the capture can fail if
2102	* the capture buffer is not around anymore.
2103	*
2104	* This can happen if the host's capturing device has been changed suddenly. */
2105	rc = VINF_SUCCESS;
2106	break;
2107	}
2108
2109	default:
2110	rc = VERR_NOT_SUPPORTED;
2111	break;
2112	}
2113
2114	return rc;
2115	}
2116
2117	/**
2118	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCapture}
2119	*/
2120	int drvHostDSoundStreamCapture(PPDMIHOSTAUDIO pInterface,
2121	PPDMAUDIOBACKENDSTREAM pStream, void pvBuf, uint32_t cxBuf, uint32_t pcxRead)
2122	{
2123
2124	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2125	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
2126	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
2127	AssertReturn(cxBuf, VERR_INVALID_PARAMETER);
2128
2129	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2130	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2131
2132	int rc = VINF_SUCCESS;
2133
2134	uint32_t cbReadTotal = 0;
2135
2136	uint32_t cbToRead = RT_MIN((uint32_t)RTCircBufUsed(pStreamDS->pCircBuf), cxBuf);
2137	while (cbToRead)
2138	{
2139	void *pvChunk;
2140	size_t cbChunk;
2141	RTCircBufAcquireReadBlock(pStreamDS->pCircBuf, cbToRead, &pvChunk, &cbChunk);
2142
2143	if (cbChunk)
2144	{
2145	memcpy((uint8_t *)pvBuf + cbReadTotal, pvChunk, cbChunk);
2146	cbReadTotal += (uint32_t)cbChunk;
2147	Assert(cbToRead >= cbChunk);
2148	cbToRead -= (uint32_t)cbChunk;
2149	}
2150
2151	RTCircBufReleaseReadBlock(pStreamDS->pCircBuf, cbChunk);
2152	}
2153
2154	if (RT_SUCCESS(rc))
2155	{
2156	if (pcxRead)
2157	*pcxRead = cbReadTotal;
2158	}
2159	else
2160	dsoundUpdateStatusInternal(pThis);
2161
2162	return rc;
2163	}
2164
2165	static int dsoundDestroyStreamIn(PDRVHOSTDSOUND pThis, PDSOUNDSTREAM pStreamDS)
2166	{
2167	LogFlowFuncEnter();
2168
2169	directSoundCaptureClose(pThis, pStreamDS);
2170
2171	return VINF_SUCCESS;
2172	}
2173
2174	/**
2175	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetConfig}
2176	*/
2177	int drvHostDSoundGetConfig(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDCFG pBackendCfg)
2178	{
2179	RT_NOREF(pInterface);
2180	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2181	AssertPtrReturn(pBackendCfg, VERR_INVALID_POINTER);
2182
2183	RT_BZERO(pBackendCfg, sizeof(PPDMAUDIOBACKENDCFG));
2184
2185	pBackendCfg->cbStreamOut = sizeof(DSOUNDSTREAM);
2186	pBackendCfg->cbStreamIn = sizeof(DSOUNDSTREAM);
2187
2188	RTStrPrintf2(pBackendCfg->szName, sizeof(pBackendCfg->szName), "DirectSound audio driver");
2189
2190	pBackendCfg->cMaxStreamsIn = UINT32_MAX;
2191	pBackendCfg->cMaxStreamsOut = UINT32_MAX;
2192
2193	return VINF_SUCCESS;
2194	}
2195
2196	/**
2197	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetDevices}
2198	*/
2199	static DECLCALLBACK(int) drvHostDSoundGetDevices(PPDMIHOSTAUDIO pInterface, PPDMAUDIODEVICEENUM pDeviceEnum)
2200	{
2201	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2202	AssertPtrReturn(pDeviceEnum, VERR_INVALID_POINTER);
2203
2204	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2205
2206	int rc = RTCritSectEnter(&pThis->CritSect);
2207	if (RT_SUCCESS(rc))
2208	{
2209	rc = DrvAudioHlpDeviceEnumInit(pDeviceEnum);
2210	if (RT_SUCCESS(rc))
2211	{
2212	rc = dsoundDevicesEnumerate(pThis, pDeviceEnum);
2213	if (RT_FAILURE(rc))
2214	DrvAudioHlpDeviceEnumFree(pDeviceEnum);
2215	}
2216
2217	int rc2 = RTCritSectLeave(&pThis->CritSect);
2218	AssertRC(rc2);
2219	}
2220
2221	LogFlowFunc(("Returning %Rrc\n", rc));
2222	return rc;
2223	}
2224
2225	/**
2226	* @interface_method_impl{PDMIHOSTAUDIO,pfnShutdown}
2227	*/
2228	void drvHostDSoundShutdown(PPDMIHOSTAUDIO pInterface)
2229	{
2230	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2231
2232	LogFlowFuncEnter();
2233
2234	RT_NOREF(pThis);
2235
2236	LogFlowFuncLeave();
2237	}
2238
2239	/**
2240	* @interface_method_impl{PDMIHOSTAUDIO,pfnInit}
2241	*/
2242	static DECLCALLBACK(int) drvHostDSoundInit(PPDMIHOSTAUDIO pInterface)
2243	{
2244	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2245	LogFlowFuncEnter();
2246
2247	int rc;
2248
2249	/* Verify that IDirectSound is available. */
2250	LPDIRECTSOUND pDirectSound = NULL;
2251	HRESULT hr = CoCreateInstance(CLSID_DirectSound, NULL, CLSCTX_ALL, IID_IDirectSound, (void **)&pDirectSound);
2252	if (SUCCEEDED(hr))
2253	{
2254	IDirectSound_Release(pDirectSound);
2255
2256	rc = VINF_SUCCESS;
2257
2258	dsoundUpdateStatusInternal(pThis);
2259	}
2260	else
2261	{
2262	DSLOGREL(("DSound: DirectSound not available: %Rhrc\n", hr));
2263	rc = VERR_NOT_SUPPORTED;
2264	}
2265
2266	LogFlowFuncLeaveRC(rc);
2267	return rc;
2268	}
2269
2270	static LPCGUID dsoundConfigQueryGUID(PCFGMNODE pCfg, const char pszName, RTUUID pUuid)
2271	{
2272	LPCGUID pGuid = NULL;
2273
2274	char *pszGuid = NULL;
2275	int rc = CFGMR3QueryStringAlloc(pCfg, pszName, &pszGuid);
2276	if (RT_SUCCESS(rc))
2277	{
2278	rc = RTUuidFromStr(pUuid, pszGuid);
2279	if (RT_SUCCESS(rc))
2280	pGuid = (LPCGUID)&pUuid;
2281	else
2282	DSLOGREL(("DSound: Error parsing device GUID for device '%s': %Rrc\n", pszName, rc));
2283
2284	RTStrFree(pszGuid);
2285	}
2286
2287	return pGuid;
2288	}
2289
2290	static int dsoundConfigInit(PDRVHOSTDSOUND pThis, PCFGMNODE pCfg)
2291	{
2292	pThis->Cfg.pGuidPlay = dsoundConfigQueryGUID(pCfg, "DeviceGuidOut", &pThis->Cfg.uuidPlay);
2293	pThis->Cfg.pGuidCapture = dsoundConfigQueryGUID(pCfg, "DeviceGuidIn", &pThis->Cfg.uuidCapture);
2294
2295	DSLOG(("DSound: Configuration: DeviceGuidOut {%RTuuid}, DeviceGuidIn {%RTuuid}\n",
2296	&pThis->Cfg.uuidPlay,
2297	&pThis->Cfg.uuidCapture));
2298
2299	return VINF_SUCCESS;
2300	}
2301
2302	/**
2303	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetStatus}
2304	*/
2305	static DECLCALLBACK(PDMAUDIOBACKENDSTS) drvHostDSoundGetStatus(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir)
2306	{
2307	RT_NOREF(enmDir);
2308	AssertPtrReturn(pInterface, PDMAUDIOBACKENDSTS_UNKNOWN);
2309
2310	return PDMAUDIOBACKENDSTS_RUNNING;
2311	}
2312
2313	/**
2314	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCreate}
2315	*/
2316	static DECLCALLBACK(int) drvHostDSoundStreamCreate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
2317	PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
2318	{
2319	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2320	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
2321	AssertPtrReturn(pCfgReq, VERR_INVALID_POINTER);
2322	AssertPtrReturn(pCfgAcq, VERR_INVALID_POINTER);
2323
2324	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2325	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2326
2327	int rc;
2328	if (pCfgReq->enmDir == PDMAUDIODIR_IN)
2329	rc = dsoundCreateStreamIn(pThis, pStreamDS, pCfgReq, pCfgAcq);
2330	else
2331	rc = dsoundCreateStreamOut(pThis, pStreamDS, pCfgReq, pCfgAcq);
2332
2333	if (RT_SUCCESS(rc))
2334	{
2335	rc = DrvAudioHlpStreamCfgCopy(&pStreamDS->Cfg, pCfgAcq);
2336	if (RT_SUCCESS(rc))
2337	rc = RTCritSectInit(&pStreamDS->CritSect);
2338	}
2339
2340	return rc;
2341	}
2342
2343	/**
2344	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDestroy}
2345	*/
2346	static DECLCALLBACK(int) drvHostDSoundStreamDestroy(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2347	{
2348	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2349	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
2350
2351	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2352	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2353
2354	int rc;
2355	if (pStreamDS->Cfg.enmDir == PDMAUDIODIR_IN)
2356	rc = dsoundDestroyStreamIn(pThis, pStreamDS);
2357	else
2358	rc = dsoundDestroyStreamOut(pThis, pStreamDS);
2359
2360	if (RT_SUCCESS(rc))
2361	{
2362	if (RTCritSectIsInitialized(&pStreamDS->CritSect))
2363	rc = RTCritSectDelete(&pStreamDS->CritSect);
2364	}
2365
2366	return rc;
2367	}
2368
2369	/**
2370	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamControl}
2371	*/
2372	static DECLCALLBACK(int) drvHostDSoundStreamControl(PPDMIHOSTAUDIO pInterface,
2373	PPDMAUDIOBACKENDSTREAM pStream, PDMAUDIOSTREAMCMD enmStreamCmd)
2374	{
2375	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2376	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
2377
2378	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2379	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2380
2381	int rc;
2382	if (pStreamDS->Cfg.enmDir == PDMAUDIODIR_IN)
2383	rc = dsoundControlStreamIn(pThis, pStreamDS, enmStreamCmd);
2384	else
2385	rc = dsoundControlStreamOut(pThis, pStreamDS, enmStreamCmd);
2386
2387	return rc;
2388	}
2389
2390	/**
2391	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetReadable}
2392	*/
2393	static DECLCALLBACK(uint32_t) drvHostDSoundStreamGetReadable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2394	{
2395	RT_NOREF(pInterface);
2396	AssertPtrReturn(pStream, PDMAUDIOSTREAMSTS_FLAG_NONE);
2397
2398	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2399
2400	if ( pStreamDS->fEnabled
2401	&& pStreamDS->pCircBuf)
2402	{
2403	return (uint32_t)RTCircBufUsed(pStreamDS->pCircBuf);
2404	}
2405
2406	return 0;
2407	}
2408
2409	/**
2410	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetWritable}
2411	*/
2412	static DECLCALLBACK(uint32_t) drvHostDSoundStreamGetWritable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2413	{
2414	AssertPtrReturn(pInterface, PDMAUDIOSTREAMSTS_FLAG_NONE);
2415	AssertPtrReturn(pStream, PDMAUDIOSTREAMSTS_FLAG_NONE);
2416
2417	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2418
2419	if (pStreamDS->fEnabled)
2420	return (uint32_t)RTCircBufFree(pStreamDS->pCircBuf);
2421
2422	return 0;
2423	}
2424
2425	/**
2426	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetPending}
2427	*/
2428	static DECLCALLBACK(uint32_t) drvHostDSoundStreamGetPending(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2429	{
2430	RT_NOREF(pInterface);
2431	AssertPtrReturn(pStream, 0);
2432
2433	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2434
2435	if (pStreamDS->Cfg.enmDir == PDMAUDIODIR_OUT)
2436	{
2437	uint32_t cbPending = 0;
2438
2439	/* Any uncommitted data left? */
2440	if (pStreamDS->pCircBuf)
2441	cbPending = (uint32_t)RTCircBufUsed(pStreamDS->pCircBuf);
2442
2443	/* Check if we have committed data which still needs to be played by
2444	* by DirectSound's streaming buffer. */
2445	if (!cbPending)
2446	{
2447	const uint64_t diffLastTransferredMs = RTTimeMilliTS() - pStreamDS->Out.tsLastTransferredMs;
2448	const uint64_t uLastTranserredChunkMs = DrvAudioHlpBytesToMilli(pStreamDS->Out.cbLastTransferred, &pStreamDS->Cfg.Props);
2449	if ( uLastTranserredChunkMs
2450	&& diffLastTransferredMs < uLastTranserredChunkMs)
2451	cbPending = 1;
2452
2453	Log3Func(("diffLastTransferredMs=%RU64ms, uLastTranserredChunkMs=%RU64ms (%RU32 bytes) -> cbPending=%RU32\n",
2454	diffLastTransferredMs, uLastTranserredChunkMs, pStreamDS->Out.cbLastTransferred, cbPending));
2455	}
2456	else
2457	Log3Func(("cbPending=%RU32\n", cbPending));
2458
2459	return cbPending;
2460	}
2461	/* Note: For input streams we never have pending data left. */
2462
2463	return 0;
2464	}
2465
2466	/**
2467	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetStatus}
2468	*/
2469	static DECLCALLBACK(PDMAUDIOSTREAMSTS) drvHostDSoundStreamGetStatus(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2470	{
2471	RT_NOREF(pInterface);
2472	AssertPtrReturn(pStream, PDMAUDIOSTREAMSTS_FLAG_NONE);
2473
2474	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2475
2476	PDMAUDIOSTREAMSTS strmSts = PDMAUDIOSTREAMSTS_FLAG_INITIALIZED;
2477
2478	if (pStreamDS->fEnabled)
2479	strmSts \|= PDMAUDIOSTREAMSTS_FLAG_ENABLED;
2480
2481	return strmSts;
2482	}
2483
2484	/**
2485	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamIterate}
2486	*/
2487	static DECLCALLBACK(int) drvHostDSoundStreamIterate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2488	{
2489	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2490	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
2491
2492	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2493	PDSOUNDSTREAM pStreamDS = (PDSOUNDSTREAM)pStream;
2494
2495	if (pStreamDS->Cfg.enmDir == PDMAUDIODIR_IN)
2496	{
2497	return dsoundCaptureTransfer(pThis, pStreamDS);
2498	}
2499	else if (pStreamDS->Cfg.enmDir == PDMAUDIODIR_OUT)
2500	{
2501	return dsoundPlayTransfer(pThis, pStreamDS);
2502	}
2503
2504	return VINF_SUCCESS;
2505	}
2506
2507	#ifdef VBOX_WITH_AUDIO_CALLBACKS
2508	/**
2509	* @interface_method_impl{PDMIHOSTAUDIO,pfnSetCallback}
2510	*/
2511	static DECLCALLBACK(int) drvHostDSoundSetCallback(PPDMIHOSTAUDIO pInterface, PFNPDMHOSTAUDIOCALLBACK pfnCallback)
2512	{
2513	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
2514	/* pfnCallback will be handled below. */
2515
2516	PDRVHOSTDSOUND pThis = PDMIHOSTAUDIO_2_DRVHOSTDSOUND(pInterface);
2517
2518	int rc = RTCritSectEnter(&pThis->CritSect);
2519	if (RT_SUCCESS(rc))
2520	{
2521	LogFunc(("pfnCallback=%p\n", pfnCallback));
2522
2523	if (pfnCallback) /* Register. */
2524	{
2525	Assert(pThis->pfnCallback == NULL);
2526	pThis->pfnCallback = pfnCallback;
2527
2528	#ifdef VBOX_WITH_AUDIO_MMNOTIFICATION_CLIENT
2529	if (pThis->m_pNotificationClient)
2530	pThis->m_pNotificationClient->RegisterCallback(pThis->pDrvIns, pfnCallback);
2531	#endif
2532	}
2533	else /* Unregister. */
2534	{
2535	if (pThis->pfnCallback)
2536	pThis->pfnCallback = NULL;
2537
2538	#ifdef VBOX_WITH_AUDIO_MMNOTIFICATION_CLIENT
2539	if (pThis->m_pNotificationClient)
2540	pThis->m_pNotificationClient->UnregisterCallback();
2541	#endif
2542	}
2543
2544	int rc2 = RTCritSectLeave(&pThis->CritSect);
2545	AssertRC(rc2);
2546	}
2547
2548	return rc;
2549	}
2550	#endif
2551
2552
2553	/*********************************************************************************************************************************
2554	* PDMDRVINS::IBase Interface *
2555	*********************************************************************************************************************************/
2556
2557	/**
2558	* @callback_method_impl{PDMIBASE,pfnQueryInterface}
2559	*/
2560	static DECLCALLBACK(void ) drvHostDSoundQueryInterface(PPDMIBASE pInterface, const char pszIID)
2561	{
2562	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
2563	PDRVHOSTDSOUND pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTDSOUND);
2564
2565	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
2566	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio);
2567	return NULL;
2568	}
2569
2570
2571	/*********************************************************************************************************************************
2572	* PDMDRVREG Interface *
2573	*********************************************************************************************************************************/
2574
2575	/**
2576	* @callback_method_impl{FNPDMDRVDESTRUCT, pfnDestruct}
2577	*/
2578	static DECLCALLBACK(void) drvHostDSoundDestruct(PPDMDRVINS pDrvIns)
2579	{
2580	PDRVHOSTDSOUND pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTDSOUND);
2581	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
2582
2583	LogFlowFuncEnter();
2584
2585	#ifdef VBOX_WITH_AUDIO_MMNOTIFICATION_CLIENT
2586	if (pThis->m_pNotificationClient)
2587	{
2588	pThis->m_pNotificationClient->Dispose();
2589	pThis->m_pNotificationClient->Release();
2590
2591	pThis->m_pNotificationClient = NULL;
2592	}
2593	#endif
2594
2595	DrvAudioHlpDeviceEnumFree(&pThis->DeviceEnum);
2596
2597	if (pThis->pDrvIns)
2598	CoUninitialize();
2599
2600	int rc2 = RTCritSectDelete(&pThis->CritSect);
2601	AssertRC(rc2);
2602
2603	LogFlowFuncLeave();
2604	}
2605
2606	/**
2607	* @callback_method_impl{FNPDMDRVCONSTRUCT,
2608	* Construct a DirectSound Audio driver instance.}
2609	*/
2610	static DECLCALLBACK(int) drvHostDSoundConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
2611	{
2612	RT_NOREF(fFlags);
2613	PDRVHOSTDSOUND pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTDSOUND);
2614
2615	LogRel(("Audio: Initializing DirectSound audio driver\n"));
2616
2617	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
2618
2619	HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
2620	if (FAILED(hr))
2621	{
2622	DSLOGREL(("DSound: CoInitializeEx failed with %Rhrc\n", hr));
2623	return VERR_NOT_SUPPORTED;
2624	}
2625
2626	/*
2627	* Init basic data members and interfaces.
2628	*/
2629	pThis->pDrvIns = pDrvIns;
2630	/* IBase */
2631	pDrvIns->IBase.pfnQueryInterface = drvHostDSoundQueryInterface;
2632	/* IHostAudio */
2633	PDMAUDIO_IHOSTAUDIO_CALLBACKS(drvHostDSound);
2634	pThis->IHostAudio.pfnStreamGetPending = drvHostDSoundStreamGetPending;
2635
2636	/* This backend supports device enumeration. */
2637	pThis->IHostAudio.pfnGetDevices = drvHostDSoundGetDevices;
2638
2639	#ifdef VBOX_WITH_AUDIO_CALLBACKS
2640	/* This backend supports host audio callbacks. */
2641	pThis->IHostAudio.pfnSetCallback = drvHostDSoundSetCallback;
2642	pThis->pfnCallback = NULL;
2643	#endif
2644
2645	/*
2646	* Init the static parts.
2647	*/
2648	DrvAudioHlpDeviceEnumInit(&pThis->DeviceEnum);
2649
2650	pThis->fEnabledIn = false;
2651	pThis->fEnabledOut = false;
2652
2653	int rc = VINF_SUCCESS;
2654
2655	#ifdef VBOX_WITH_AUDIO_MMNOTIFICATION_CLIENT
2656	bool fUseNotificationClient = false;
2657
2658	char szOSVersion[32];
2659	rc = RTSystemQueryOSInfo(RTSYSOSINFO_RELEASE, szOSVersion, sizeof(szOSVersion));
2660	if (RT_SUCCESS(rc))
2661	{
2662	/* IMMNotificationClient is available starting at Windows Vista. */
2663	if (RTStrVersionCompare(szOSVersion, "6.0") >= 0)
2664	fUseNotificationClient = true;
2665	}
2666
2667	if (fUseNotificationClient)
2668	{
2669	try
2670	{
2671	pThis->m_pNotificationClient = new VBoxMMNotificationClient();
2672
2673	HRESULT hr = pThis->m_pNotificationClient->Initialize();
2674	if (FAILED(hr))
2675	rc = VERR_AUDIO_BACKEND_INIT_FAILED;
2676	}
2677	catch (std::bad_alloc &ex)
2678	{
2679	NOREF(ex);
2680	rc = VERR_NO_MEMORY;
2681	}
2682	}
2683
2684	LogRel2(("DSound: Notification client is %s\n", fUseNotificationClient ? "enabled" : "disabled"));
2685	#endif
2686
2687	if (RT_SUCCESS(rc))
2688	{
2689	/*
2690	* Initialize configuration values.
2691	*/
2692	rc = dsoundConfigInit(pThis, pCfg);
2693	if (RT_SUCCESS(rc))
2694	rc = RTCritSectInit(&pThis->CritSect);
2695	}
2696
2697	return rc;
2698	}
2699
2700
2701	/**
2702	* PDM driver registration.
2703	*/
2704	const PDMDRVREG g_DrvHostDSound =
2705	{
2706	/* u32Version */
2707	PDM_DRVREG_VERSION,
2708	/* szName */
2709	"DSoundAudio",
2710	/* szRCMod */
2711	"",
2712	/* szR0Mod */
2713	"",
2714	/* pszDescription */
2715	"DirectSound Audio host driver",
2716	/* fFlags */
2717	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
2718	/* fClass. */
2719	PDM_DRVREG_CLASS_AUDIO,
2720	/* cMaxInstances */
2721	~0U,
2722	/* cbInstance */
2723	sizeof(DRVHOSTDSOUND),
2724	/* pfnConstruct */
2725	drvHostDSoundConstruct,
2726	/* pfnDestruct */
2727	drvHostDSoundDestruct,
2728	/* pfnRelocate */
2729	NULL,
2730	/* pfnIOCtl */
2731	NULL,
2732	/* pfnPowerOn */
2733	NULL,
2734	/* pfnReset */
2735	NULL,
2736	/* pfnSuspend */
2737	NULL,
2738	/* pfnResume */
2739	NULL,
2740	/* pfnAttach */
2741	NULL,
2742	/* pfnDetach */
2743	NULL,
2744	/* pfnPowerOff */
2745	NULL,
2746	/* pfnSoftReset */
2747	NULL,
2748	/* u32EndVersion */
2749	PDM_DRVREG_VERSION
2750	};
2751

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source: vbox/trunk/src/VBox/Devices/Audio/DrvHostDSound.cpp@ 78271

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