DrvHostAudioCoreAudio.cpp@ 98103

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1	/* $Id: DrvHostAudioCoreAudio.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* Host audio driver - Mac OS X CoreAudio.
4	*
5	* For relevant Apple documentation, here are some starters:
6	* - Core Audio Essentials
7	* https://developer.apple.com/library/archive/documentation/MusicAudio/Conceptual/CoreAudioOverview/CoreAudioEssentials/CoreAudioEssentials.html
8	* - TN2097: Playing a sound file using the Default Output Audio Unit
9	* https://developer.apple.com/library/archive/technotes/tn2097/
10	* - TN2091: Device input using the HAL Output Audio Unit
11	* https://developer.apple.com/library/archive/technotes/tn2091/
12	* - Audio Component Services
13	* https://developer.apple.com/documentation/audiounit/audio_component_services?language=objc
14	* - QA1533: How to handle kAudioUnitProperty_MaximumFramesPerSlice
15	* https://developer.apple.com/library/archive/qa/qa1533/
16	* - QA1317: Signaling the end of data when using AudioConverterFillComplexBuffer
17	* https://developer.apple.com/library/archive/qa/qa1317/
18	*/
19
20	/*
21	* Copyright (C) 2010-2023 Oracle and/or its affiliates.
22	*
23	* This file is part of VirtualBox base platform packages, as
24	* available from https://www.virtualbox.org.
25	*
26	* This program is free software; you can redistribute it and/or
27	* modify it under the terms of the GNU General Public License
28	* as published by the Free Software Foundation, in version 3 of the
29	* License.
30	*
31	* This program is distributed in the hope that it will be useful, but
32	* WITHOUT ANY WARRANTY; without even the implied warranty of
33	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
34	* General Public License for more details.
35	*
36	* You should have received a copy of the GNU General Public License
37	* along with this program; if not, see <https://www.gnu.org/licenses>.
38	*
39	* SPDX-License-Identifier: GPL-3.0-only
40	*/
41
42
43	/*********************************************************************************************************************************
44	* Header Files *
45	*********************************************************************************************************************************/
46	#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
47	#include <VBox/log.h>
48	#include <VBox/vmm/pdmaudioinline.h>
49	#include <VBox/vmm/pdmaudiohostenuminline.h>
50
51	#include "VBoxDD.h"
52
53	#include <iprt/asm.h>
54	#include <iprt/cdefs.h>
55	#include <iprt/circbuf.h>
56	#include <iprt/mem.h>
57	#include <iprt/uuid.h>
58	#include <iprt/timer.h>
59
60	#include <CoreAudio/CoreAudio.h>
61	#include <CoreServices/CoreServices.h>
62	#include <AudioToolbox/AudioQueue.h>
63	#include <AudioUnit/AudioUnit.h>
64
65	#if MAC_OS_X_VERSION_MIN_REQUIRED < 1090 /* possibly 1080 */
66	# define kAudioHardwarePropertyTranslateUIDToDevice (AudioObjectPropertySelector)'uidd'
67	#endif
68
69
70	/*********************************************************************************************************************************
71	* Defined Constants And Macros *
72	*********************************************************************************************************************************/
73	/** The max number of queue buffers we'll use. */
74	#define COREAUDIO_MAX_BUFFERS 1024
75	/** The minimum number of queue buffers. */
76	#define COREAUDIO_MIN_BUFFERS 4
77
78	/** Enables the worker thread.
79	* This saves CoreAudio from creating an additional thread upon queue
80	* creation. (It does not help with the slow AudioQueueDispose fun.) */
81	#define CORE_AUDIO_WITH_WORKER_THREAD
82	#if 0
83	/** Enables the AudioQueueDispose breakpoint timer (debugging help). */
84	# define CORE_AUDIO_WITH_BREAKPOINT_TIMER
85	#endif
86
87
88	/*********************************************************************************************************************************
89	* Structures and Typedefs *
90	*********************************************************************************************************************************/
91	/** Pointer to the instance data for a Core Audio driver instance. */
92	typedef struct DRVHOSTCOREAUDIO *PDRVHOSTCOREAUDIO;
93	/** Pointer to the Core Audio specific backend data for an audio stream. */
94	typedef struct COREAUDIOSTREAM *PCOREAUDIOSTREAM;
95
96	/**
97	* Core Audio device entry (enumeration).
98	*
99	* @note This is definitely not safe to just copy!
100	*/
101	typedef struct COREAUDIODEVICEDATA
102	{
103	/** The core PDM structure. */
104	PDMAUDIOHOSTDEV Core;
105
106	/** The audio device ID of the currently used device (UInt32 typedef). */
107	AudioDeviceID idDevice;
108	} COREAUDIODEVICEDATA;
109	/** Pointer to a Core Audio device entry (enumeration). */
110	typedef COREAUDIODEVICEDATA *PCOREAUDIODEVICEDATA;
111
112
113	/**
114	* Audio device information.
115	*
116	* We do not use COREAUDIODEVICEDATA here as it contains lots more than what we
117	* need and care to query. We also don't want to depend on DrvAudio making
118	* PDMIHOSTAUDIO::pfnGetDevices callbacks to keep this information up to date.
119	*/
120	typedef struct DRVHSTAUDCADEVICE
121	{
122	/** The audio device ID. kAudioDeviceUnknown if not available. */
123	AudioObjectID idDevice;
124	/** Indicates whether we've registered device change listener. */
125	bool fRegisteredListeners;
126	/** The UID string (must release). NULL if not available. */
127	CFStringRef hStrUid;
128	/** The UID string for a specific device, NULL if we're using the default device. */
129	char *pszSpecific;
130	} DRVHSTAUDCADEVICE;
131	/** Pointer to info about a default device. */
132	typedef DRVHSTAUDCADEVICE *PDRVHSTAUDCADEVICE;
133
134
135	/**
136	* Core Audio stream state.
137	*/
138	typedef enum COREAUDIOINITSTATE
139	{
140	/** The device is uninitialized. */
141	COREAUDIOINITSTATE_UNINIT = 0,
142	/** The device is currently initializing. */
143	COREAUDIOINITSTATE_IN_INIT,
144	/** The device is initialized. */
145	COREAUDIOINITSTATE_INIT,
146	/** The device is currently uninitializing. */
147	COREAUDIOINITSTATE_IN_UNINIT,
148	/** The usual 32-bit hack. */
149	COREAUDIOINITSTATE_32BIT_HACK = 0x7fffffff
150	} COREAUDIOINITSTATE;
151
152
153	/**
154	* Core audio buffer tracker.
155	*
156	* For output buffer we'll be using AudioQueueBuffer::mAudioDataByteSize to
157	* track how much we've written. When a buffer is full, or if we run low on
158	* queued bufferes, it will be queued.
159	*
160	* For input buffer we'll be using offRead to track how much we've read.
161	*
162	* The queued/not-queued state is stored in the first bit of
163	* AudioQueueBuffer::mUserData. While bits 8 and up holds the index into
164	* COREAUDIOSTREAM::paBuffers.
165	*/
166	typedef struct COREAUDIOBUF
167	{
168	/** The buffer. */
169	AudioQueueBufferRef pBuf;
170	/** The buffer read offset (input only). */
171	uint32_t offRead;
172	} COREAUDIOBUF;
173	/** Pointer to a core audio buffer tracker. */
174	typedef COREAUDIOBUF *PCOREAUDIOBUF;
175
176
177	/**
178	* Core Audio specific data for an audio stream.
179	*/
180	typedef struct COREAUDIOSTREAM
181	{
182	/** Common part. */
183	PDMAUDIOBACKENDSTREAM Core;
184
185	/** The stream's acquired configuration. */
186	PDMAUDIOSTREAMCFG Cfg;
187	/** List node for the device's stream list. */
188	RTLISTNODE Node;
189	/** The acquired (final) audio format for this stream.
190	* @note This what the device requests, we don't alter anything. */
191	AudioStreamBasicDescription BasicStreamDesc;
192	/** The actual audio queue being used. */
193	AudioQueueRef hAudioQueue;
194
195	/** Number of buffers. */
196	uint32_t cBuffers;
197	/** The array of buffer. */
198	PCOREAUDIOBUF paBuffers;
199
200	/** Initialization status tracker, actually COREAUDIOINITSTATE.
201	* Used when some of the device parameters or the device itself is changed
202	* during the runtime. */
203	volatile uint32_t enmInitState;
204	/** The current buffer being written to / read from. */
205	uint32_t idxBuffer;
206	/** Set if the stream is enabled. */
207	bool fEnabled;
208	/** Set if the stream is started (playing/capturing). */
209	bool fStarted;
210	/** Set if the stream is draining (output only). */
211	bool fDraining;
212	/** Set if we should restart the stream on resume (saved pause state). */
213	bool fRestartOnResume;
214	// /** Set if we're switching to a new output/input device. */
215	// bool fSwitchingDevice;
216	/** Internal stream offset (bytes). */
217	uint64_t offInternal;
218	/** The RTTimeMilliTS() at the end of the last transfer. */
219	uint64_t msLastTransfer;
220
221	/** Critical section for serializing access between thread + callbacks. */
222	RTCRITSECT CritSect;
223	/** Buffer that drvHstAudCaStreamStatusString uses. */
224	char szStatus[64];
225	} COREAUDIOSTREAM;
226
227
228	/**
229	* Instance data for a Core Audio host audio driver.
230	*
231	* @implements PDMIAUDIOCONNECTOR
232	*/
233	typedef struct DRVHOSTCOREAUDIO
234	{
235	/** Pointer to the driver instance structure. */
236	PPDMDRVINS pDrvIns;
237	/** Pointer to host audio interface. */
238	PDMIHOSTAUDIO IHostAudio;
239	/** The input device. */
240	DRVHSTAUDCADEVICE InputDevice;
241	/** The output device. */
242	DRVHSTAUDCADEVICE OutputDevice;
243	/** Upwards notification interface. */
244	PPDMIHOSTAUDIOPORT pIHostAudioPort;
245	/** Indicates whether we've registered default input device change listener. */
246	bool fRegisteredDefaultInputListener;
247	/** Indicates whether we've registered default output device change listener. */
248	bool fRegisteredDefaultOutputListener;
249
250	#ifdef CORE_AUDIO_WITH_WORKER_THREAD
251	/** @name Worker Thread For Queue callbacks and stuff.
252	* @{ */
253	/** The worker thread. */
254	RTTHREAD hThread;
255	/** The runloop of the worker thread. */
256	CFRunLoopRef hThreadRunLoop;
257	/** The message port we use to talk to the thread.
258	* @note While we don't currently use the port, it is necessary to prevent
259	* the thread from spinning or stopping prematurely because of
260	* CFRunLoopRunInMode returning kCFRunLoopRunFinished. */
261	CFMachPortRef hThreadPort;
262	/** Runloop source for hThreadPort. */
263	CFRunLoopSourceRef hThreadPortSrc;
264	/** @} */
265	#endif
266
267	/** Critical section to serialize access. */
268	RTCRITSECT CritSect;
269	#ifdef CORE_AUDIO_WITH_BREAKPOINT_TIMER
270	/** Timder for debugging AudioQueueDispose slowness. */
271	RTTIMERLR hBreakpointTimer;
272	#endif
273	} DRVHOSTCOREAUDIO;
274
275
276	/*********************************************************************************************************************************
277	* Internal Functions *
278	*********************************************************************************************************************************/
279	static void drvHstAudCaUpdateOneDefaultDevice(PDRVHOSTCOREAUDIO pThis, PDRVHSTAUDCADEVICE pDevice, bool fInput, bool fNotify);
280
281	/* DrvHostAudioCoreAudioAuth.mm: */
282	DECLHIDDEN(int) coreAudioInputPermissionCheck(void);
283
284
285	#ifdef LOG_ENABLED
286	/**
287	* Gets the stream status.
288	*
289	* @returns Pointer to stream status string.
290	* @param pStreamCA The stream to get the status for.
291	*/
292	static const char *drvHstAudCaStreamStatusString(PCOREAUDIOSTREAM pStreamCA)
293	{
294	static RTSTRTUPLE const s_aInitState[5] =
295	{
296	{ RT_STR_TUPLE("UNINIT") },
297	{ RT_STR_TUPLE("IN_INIT") },
298	{ RT_STR_TUPLE("INIT") },
299	{ RT_STR_TUPLE("IN_UNINIT") },
300	{ RT_STR_TUPLE("BAD") },
301	};
302	uint32_t enmInitState = pStreamCA->enmInitState;
303	PCRTSTRTUPLE pTuple = &s_aInitState[RT_MIN(enmInitState, RT_ELEMENTS(s_aInitState) - 1)];
304	memcpy(pStreamCA->szStatus, pTuple->psz, pTuple->cch);
305	size_t off = pTuple->cch;
306
307	static RTSTRTUPLE const s_aEnable[2] =
308	{
309	{ RT_STR_TUPLE("DISABLED") },
310	{ RT_STR_TUPLE("ENABLED ") },
311	};
312	pTuple = &s_aEnable[pStreamCA->fEnabled];
313	memcpy(pStreamCA->szStatus, pTuple->psz, pTuple->cch);
314	off += pTuple->cch;
315
316	static RTSTRTUPLE const s_aStarted[2] =
317	{
318	{ RT_STR_TUPLE(" STOPPED") },
319	{ RT_STR_TUPLE(" STARTED") },
320	};
321	pTuple = &s_aStarted[pStreamCA->fStarted];
322	memcpy(&pStreamCA->szStatus[off], pTuple->psz, pTuple->cch);
323	off += pTuple->cch;
324
325	static RTSTRTUPLE const s_aDraining[2] =
326	{
327	{ RT_STR_TUPLE("") },
328	{ RT_STR_TUPLE(" DRAINING") },
329	};
330	pTuple = &s_aDraining[pStreamCA->fDraining];
331	memcpy(&pStreamCA->szStatus[off], pTuple->psz, pTuple->cch);
332	off += pTuple->cch;
333
334	Assert(off < sizeof(pStreamCA->szStatus));
335	pStreamCA->szStatus[off] = '\0';
336	return pStreamCA->szStatus;
337	}
338	#endif /LOG_ENABLED/
339
340
341
342
343	#if 0 /* unused */
344	static int drvHstAudCaCFStringToCString(const CFStringRef pCFString, char **ppszString)
345	{
346	CFIndex cLen = CFStringGetLength(pCFString) + 1;
347	char pszResult = (char )RTMemAllocZ(cLen * sizeof(char));
348	if (!CFStringGetCString(pCFString, pszResult, cLen, kCFStringEncodingUTF8))
349	{
350	RTMemFree(pszResult);
351	return VERR_NOT_FOUND;
352	}
353
354	*ppszString = pszResult;
355	return VINF_SUCCESS;
356	}
357
358	static AudioDeviceID drvHstAudCaDeviceUIDtoID(const char* pszUID)
359	{
360	/* Create a CFString out of our CString. */
361	CFStringRef strUID = CFStringCreateWithCString(NULL, pszUID, kCFStringEncodingMacRoman);
362
363	/* Fill the translation structure. */
364	AudioDeviceID deviceID;
365
366	AudioValueTranslation translation;
367	translation.mInputData = &strUID;
368	translation.mInputDataSize = sizeof(CFStringRef);
369	translation.mOutputData = &deviceID;
370	translation.mOutputDataSize = sizeof(AudioDeviceID);
371
372	/* Fetch the translation from the UID to the device ID. */
373	AudioObjectPropertyAddress PropAddr =
374	{
375	kAudioHardwarePropertyDeviceForUID,
376	kAudioObjectPropertyScopeGlobal,
377	kAudioObjectPropertyElementMaster
378	};
379
380	UInt32 uSize = sizeof(AudioValueTranslation);
381	OSStatus err = AudioObjectGetPropertyData(kAudioObjectSystemObject, &PropAddr, 0, NULL, &uSize, &translation);
382
383	/* Release the temporary CFString */
384	CFRelease(strUID);
385
386	if (RT_LIKELY(err == noErr))
387	return deviceID;
388
389	/* Return the unknown device on error. */
390	return kAudioDeviceUnknown;
391	}
392	#endif /* unused */
393
394
395	/**
396	* Wrapper around AudioObjectGetPropertyData and AudioObjectGetPropertyDataSize.
397	*
398	* @returns Pointer to temp heap allocation with the data on success, free using
399	* RTMemTmpFree. NULL on failure, fully logged.
400	*/
401	static void *drvHstAudCaGetPropertyDataEx(AudioObjectID idObject, AudioObjectPropertySelector enmSelector,
402	AudioObjectPropertyScope enmScope, AudioObjectPropertyElement enmElement,
403	const char pszWhat, UInt32 pcb)
404	{
405	AudioObjectPropertyAddress const PropAddr =
406	{
407	/.mSelector = / enmSelector,
408	/.mScope = / enmScope,
409	/.mElement = / enmElement
410	};
411
412	/*
413	* Have to retry here in case the size isn't stable (like if a new device/whatever is added).
414	*/
415	for (uint32_t iTry = 0; ; iTry++)
416	{
417	UInt32 cb = 0;
418	OSStatus orc = AudioObjectGetPropertyDataSize(idObject, &PropAddr, 0, NULL, &cb);
419	if (orc == noErr)
420	{
421	cb = RT_MAX(cb, 1); /* we're allergic to zero allocations. */
422	void *pv = RTMemTmpAllocZ(cb);
423	if (pv)
424	{
425	orc = AudioObjectGetPropertyData(idObject, &PropAddr, 0, NULL, &cb, pv);
426	if (orc == noErr)
427	{
428	Log9Func(("%u/%#x/%#x/%x/%s: returning %p LB %#x\n",
429	idObject, enmSelector, enmScope, enmElement, pszWhat, pv, cb));
430	if (pcb)
431	*pcb = cb;
432	return pv;
433	}
434
435	RTMemTmpFree(pv);
436	LogFunc(("AudioObjectGetPropertyData(%u/%#x/%#x/%x/%s, cb=%#x) -> %#x, iTry=%d\n",
437	idObject, enmSelector, enmScope, enmElement, pszWhat, cb, orc, iTry));
438	if (iTry < 3)
439	continue;
440	LogRelMax(32, ("CoreAudio: AudioObjectGetPropertyData(%u/%#x/%#x/%x/%s, cb=%#x) failed: %#x\n",
441	idObject, enmSelector, enmScope, enmElement, pszWhat, cb, orc));
442	}
443	else
444	LogRelMax(32, ("CoreAudio: Failed to allocate %#x bytes (to get %s for %s).\n", cb, pszWhat, idObject));
445	}
446	else
447	LogRelMax(32, ("CoreAudio: Failed to get %s for %u: %#x\n", pszWhat, idObject, orc));
448	if (pcb)
449	*pcb = 0;
450	return NULL;
451	}
452	}
453
454
455	/**
456	* Wrapper around AudioObjectGetPropertyData.
457	*
458	* @returns Success indicator. Failures (@c false) are fully logged.
459	*/
460	static bool drvHstAudCaGetPropertyData(AudioObjectID idObject, AudioObjectPropertySelector enmSelector,
461	AudioObjectPropertyScope enmScope, AudioObjectPropertyElement enmElement,
462	const char pszWhat, void pv, UInt32 cb)
463	{
464	AudioObjectPropertyAddress const PropAddr =
465	{
466	/.mSelector = / enmSelector,
467	/.mScope = / enmScope,
468	/.mElement = / enmElement
469	};
470
471	OSStatus orc = AudioObjectGetPropertyData(idObject, &PropAddr, 0, NULL, &cb, pv);
472	if (orc == noErr)
473	{
474	Log9Func(("%u/%#x/%#x/%x/%s: returning %p LB %#x\n", idObject, enmSelector, enmScope, enmElement, pszWhat, pv, cb));
475	return true;
476	}
477	LogRelMax(64, ("CoreAudio: Failed to query %s (%u/%#x/%#x/%x, cb=%#x): %#x\n",
478	pszWhat, idObject, enmSelector, enmScope, enmElement, cb, orc));
479	return false;
480	}
481
482
483	/**
484	* Count the number of channels in one direction.
485	*
486	* @returns Channel count.
487	*/
488	static uint32_t drvHstAudCaEnumCountChannels(AudioObjectID idObject, AudioObjectPropertyScope enmScope)
489	{
490	uint32_t cChannels = 0;
491
492	AudioBufferList *pBufs
493	= (AudioBufferList *)drvHstAudCaGetPropertyDataEx(idObject, kAudioDevicePropertyStreamConfiguration,
494	enmScope, kAudioObjectPropertyElementMaster, "stream config", NULL);
495	if (pBufs)
496	{
497	UInt32 idxBuf = pBufs->mNumberBuffers;
498	while (idxBuf-- > 0)
499	{
500	Log9Func(("%u/%#x[%u]: %u\n", idObject, enmScope, idxBuf, pBufs->mBuffers[idxBuf].mNumberChannels));
501	cChannels += pBufs->mBuffers[idxBuf].mNumberChannels;
502	}
503
504	RTMemTmpFree(pBufs);
505	}
506
507	return cChannels;
508	}
509
510
511	/**
512	* Translates a UID to an audio device ID.
513	*
514	* @returns Audio device ID on success, kAudioDeviceUnknown on failure.
515	* @param hStrUid The UID string to convert.
516	* @param pszUid The C-string vresion of @a hStrUid.
517	* @param pszWhat What we're converting (for logging).
518	*/
519	static AudioObjectID drvHstAudCaDeviceUidToId(CFStringRef hStrUid, const char pszUid, const char pszWhat)
520	{
521	AudioObjectPropertyAddress const PropAddr =
522	{
523	/.mSelector = / kAudioHardwarePropertyTranslateUIDToDevice,
524	/.mScope = / kAudioObjectPropertyScopeGlobal,
525	/.mElement = / kAudioObjectPropertyElementMaster
526	};
527	AudioObjectID idDevice = 0;
528	UInt32 cb = sizeof(idDevice);
529	OSStatus orc = AudioObjectGetPropertyData(kAudioObjectSystemObject, &PropAddr,
530	sizeof(hStrUid), &hStrUid, &cb, &idDevice);
531	if (orc == noErr)
532	{
533	Log9Func(("%s device UID '%s' -> %RU32\n", pszWhat, pszUid, idDevice));
534	return idDevice;
535	}
536	/** @todo test on < 10.9, see which status code and do a fallback using the
537	* enumeration code. */
538	LogRelMax(64, ("CoreAudio: Failed to translate %s device UID '%s' to audio device ID: %#x\n", pszWhat, pszUid, orc));
539	return kAudioDeviceUnknown;
540	}
541
542
543	/**
544	* Copies a CFString to a buffer (UTF-8).
545	*
546	* @returns VBox status code. In the case of a buffer overflow, the buffer will
547	* contain data and be correctly terminated (provided @a cbDst is not
548	* zero.)
549	*/
550	static int drvHstAudCaCFStringToBuf(CFStringRef hStr, char *pszDst, size_t cbDst)
551	{
552	AssertReturn(cbDst > 0, VERR_BUFFER_OVERFLOW);
553
554	if (CFStringGetCString(hStr, pszDst, cbDst, kCFStringEncodingUTF8))
555	return VINF_SUCCESS;
556
557	/* First fallback: */
558	const char *pszSrc = CFStringGetCStringPtr(hStr, kCFStringEncodingUTF8);
559	if (pszSrc)
560	return RTStrCopy(pszDst, cbDst, pszSrc);
561
562	/* Second fallback: */
563	CFIndex cbMax = CFStringGetMaximumSizeForEncoding(CFStringGetLength(hStr), kCFStringEncodingUTF8) + 1;
564	AssertReturn(cbMax > 0, VERR_INVALID_UTF8_ENCODING);
565	AssertReturn(cbMax < (CFIndex)_16M, VERR_OUT_OF_RANGE);
566
567	char pszTmp = (char )RTMemTmpAlloc(cbMax);
568	AssertReturn(pszTmp, VERR_NO_TMP_MEMORY);
569
570	int rc;
571	if (CFStringGetCString(hStr, pszTmp, cbMax, kCFStringEncodingUTF8))
572	rc = RTStrCopy(pszDst, cbDst, pszTmp);
573	else
574	{
575	*pszDst = '\0';
576	rc = VERR_INVALID_UTF8_ENCODING;
577	}
578
579	RTMemTmpFree(pszTmp);
580	return rc;
581	}
582
583
584	/**
585	* Copies a CFString to a heap buffer (UTF-8).
586	*
587	* @returns Pointer to the heap buffer on success, NULL if out of heap or some
588	* conversion/extraction problem
589	*/
590	static char *drvHstAudCaCFStringToHeap(CFStringRef hStr)
591	{
592	const char *pszSrc = CFStringGetCStringPtr(hStr, kCFStringEncodingUTF8);
593	if (pszSrc)
594	return RTStrDup(pszSrc);
595
596	/* Fallback: */
597	CFIndex cbMax = CFStringGetMaximumSizeForEncoding(CFStringGetLength(hStr), kCFStringEncodingUTF8) + 1;
598	AssertReturn(cbMax > 0, NULL);
599	AssertReturn(cbMax < (CFIndex)_16M, NULL);
600
601	char *pszDst = RTStrAlloc(cbMax);
602	if (pszDst)
603	{
604	AssertReturnStmt(CFStringGetCString(hStr, pszDst, cbMax, kCFStringEncodingUTF8), RTStrFree(pszDst), NULL);
605	size_t const cchDst = strlen(pszDst);
606	if (cbMax - cchDst > 32)
607	RTStrRealloc(&pszDst, cchDst + 1);
608	}
609	return pszDst;
610	}
611
612
613	/*********************************************************************************************************************************
614	* Device Change Notification Callbacks *
615	*********************************************************************************************************************************/
616
617	#ifdef LOG_ENABLED
618	/**
619	* Called when the kAudioDevicePropertyNominalSampleRate or
620	* kAudioDeviceProcessorOverload properties changes on a default device.
621	*
622	* Registered on default devices after device enumeration.
623	* Not sure on which thread/runloop this runs.
624	*
625	* (See AudioObjectPropertyListenerProc in the SDK headers.)
626	*/
627	static OSStatus drvHstAudCaDevicePropertyChangedCallback(AudioObjectID idObject, UInt32 cAddresses,
628	const AudioObjectPropertyAddress paAddresses[], void *pvUser)
629	{
630	LogFlowFunc(("idObject=%#x (%u) cAddresses=%u pvUser=%p\n", idObject, idObject, cAddresses, pvUser));
631	for (UInt32 idx = 0; idx < cAddresses; idx++)
632	LogFlowFunc((" #%u: sel=%#x scope=%#x element=%#x\n",
633	idx, paAddresses[idx].mSelector, paAddresses[idx].mScope, paAddresses[idx].mElement));
634
635	/** @todo r=bird: What's the plan here exactly? I've changed it to
636	* LOG_ENABLED only for now, as this has no other purpose. */
637	switch (idObject)
638	{
639	case kAudioDeviceProcessorOverload:
640	LogFunc(("Processor overload detected!\n"));
641	break;
642	case kAudioDevicePropertyNominalSampleRate:
643	LogFunc(("kAudioDevicePropertyNominalSampleRate!\n"));
644	break;
645	default:
646	/* Just skip. */
647	break;
648	}
649
650	return noErr;
651	}
652	#endif /* LOG_ENABLED */
653
654
655	/**
656	* Called when the kAudioDevicePropertyDeviceIsAlive property changes on a
657	* default device.
658	*
659	* The purpose is mainly to log the event. There isn't much we can do about
660	* active streams or future one, other than waiting for a default device change
661	* notification callback. In the mean time, active streams should start failing
662	* to work and new ones fail on creation. This is the same for when we're
663	* configure to use specific devices, only we don't get any device change
664	* callback like for default ones.
665	*
666	* Not sure on which thread/runloop this runs.
667	*
668	* (See AudioObjectPropertyListenerProc in the SDK headers.)
669	*/
670	static OSStatus drvHstAudCaDeviceIsAliveChangedCallback(AudioObjectID idObject, UInt32 cAddresses,
671	const AudioObjectPropertyAddress paAddresses[], void *pvUser)
672	{
673	PDRVHOSTCOREAUDIO pThis = (PDRVHOSTCOREAUDIO)pvUser;
674	AssertPtr(pThis);
675	RT_NOREF(cAddresses, paAddresses);
676
677	/*
678	* Log everything.
679	*/
680	LogFlowFunc(("idObject=%#x (%u) cAddresses=%u\n", idObject, idObject, cAddresses));
681	for (UInt32 idx = 0; idx < cAddresses; idx++)
682	LogFlowFunc((" #%u: sel=%#x scope=%#x element=%#x\n",
683	idx, paAddresses[idx].mSelector, paAddresses[idx].mScope, paAddresses[idx].mElement));
684
685	/*
686	* Check which devices are affected.
687	*/
688	int rc = RTCritSectEnter(&pThis->CritSect);
689	AssertRCReturn(rc, noErr); /* could be a destruction race */
690
691	for (unsigned i = 0; i < 2; i++)
692	{
693	if (idObject == (i == 0 ? pThis->InputDevice.idDevice : pThis->OutputDevice.idDevice))
694	{
695	AudioObjectPropertyAddress const PropAddr =
696	{
697	kAudioDevicePropertyDeviceIsAlive,
698	i == 0 ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
699	kAudioObjectPropertyElementMaster
700	};
701	UInt32 fAlive = 0;
702	UInt32 cb = sizeof(fAlive);
703	OSStatus orc = AudioObjectGetPropertyData(idObject, &PropAddr, 0, NULL, &cb, &fAlive);
704	if ( orc == kAudioHardwareBadDeviceError
705	\|\| (orc == noErr && !fAlive))
706	{
707	LogRel(("CoreAudio: The default %s device (%u) stopped functioning.\n", idObject, i == 0 ? "input" : "output"));
708	#if 0 /* This will only cause an extra re-init (in addition to the default device change) and likely do no good even if that
709	default device change callback doesn't arrive. So, don't do it! (bird) */
710	PPDMIHOSTAUDIOPORT pIHostAudioPort = pThis->pIHostAudioPort;
711	if (pIHostAudioPort)
712	{
713	RTCritSectLeave(&pThis->CritSect);
714
715	pIHostAudioPort->pfnNotifyDeviceChanged(pIHostAudioPort, i == 0 ? PDMAUDIODIR_IN : PDMAUDIODIR_OUT, NULL);
716
717	rc = RTCritSectEnter(&pThis->CritSect);
718	AssertRCReturn(rc, noErr); /* could be a destruction race */
719	}
720	#endif
721	}
722	}
723	}
724
725	RTCritSectLeave(&pThis->CritSect);
726	return noErr;
727	}
728
729
730	/**
731	* Called when the default recording or playback device has changed.
732	*
733	* Registered by the constructor. Not sure on which thread/runloop this runs.
734	*
735	* (See AudioObjectPropertyListenerProc in the SDK headers.)
736	*/
737	static OSStatus drvHstAudCaDefaultDeviceChangedCallback(AudioObjectID idObject, UInt32 cAddresses,
738	const AudioObjectPropertyAddress paAddresses, void pvUser)
739
740	{
741	PDRVHOSTCOREAUDIO pThis = (PDRVHOSTCOREAUDIO)pvUser;
742	AssertPtr(pThis);
743	RT_NOREF(idObject, cAddresses, paAddresses);
744
745	/*
746	* Log everything.
747	*/
748	LogFlowFunc(("idObject=%#x (%u) cAddresses=%u\n", idObject, idObject, cAddresses));
749	for (UInt32 idx = 0; idx < cAddresses; idx++)
750	LogFlowFunc((" #%u: sel=%#x scope=%#x element=%#x\n",
751	idx, paAddresses[idx].mSelector, paAddresses[idx].mScope, paAddresses[idx].mElement));
752
753	/*
754	* Update the default devices and notify parent driver if anything actually changed.
755	*/
756	drvHstAudCaUpdateOneDefaultDevice(pThis, &pThis->OutputDevice, false /fInput/, true /fNotify/);
757	drvHstAudCaUpdateOneDefaultDevice(pThis, &pThis->InputDevice, true /fInput/, true /fNotify/);
758
759	return noErr;
760	}
761
762
763	/**
764	* Registers callbacks for a specific Core Audio device.
765	*
766	* @returns true if idDevice isn't kAudioDeviceUnknown and callbacks were
767	* registered, otherwise false.
768	* @param pThis The core audio driver instance data.
769	* @param idDevice The device ID to deregister callbacks for.
770	*/
771	static bool drvHstAudCaDeviceRegisterCallbacks(PDRVHOSTCOREAUDIO pThis, AudioObjectID idDevice)
772	{
773	if (idDevice != kAudioDeviceUnknown)
774	{
775	LogFunc(("idDevice=%RU32\n", idDevice));
776	AudioObjectPropertyAddress PropAddr =
777	{
778	kAudioDevicePropertyDeviceIsAlive,
779	kAudioObjectPropertyScopeGlobal,
780	kAudioObjectPropertyElementMaster
781	};
782	OSStatus orc;
783	orc = AudioObjectAddPropertyListener(idDevice, &PropAddr, drvHstAudCaDeviceIsAliveChangedCallback, pThis);
784	unsigned cRegistrations = orc == noErr;
785	if ( orc != noErr
786	&& orc != kAudioHardwareIllegalOperationError)
787	LogRel(("CoreAudio: Failed to add the recording device state changed listener (%#x)\n", orc));
788
789	#ifdef LOG_ENABLED
790	PropAddr.mSelector = kAudioDeviceProcessorOverload;
791	PropAddr.mScope = kAudioUnitScope_Global;
792	orc = AudioObjectAddPropertyListener(idDevice, &PropAddr, drvHstAudCaDevicePropertyChangedCallback, pThis);
793	cRegistrations += orc == noErr;
794	if (orc != noErr)
795	LogRel(("CoreAudio: Failed to register processor overload listener (%#x)\n", orc));
796
797	PropAddr.mSelector = kAudioDevicePropertyNominalSampleRate;
798	PropAddr.mScope = kAudioUnitScope_Global;
799	orc = AudioObjectAddPropertyListener(idDevice, &PropAddr, drvHstAudCaDevicePropertyChangedCallback, pThis);
800	cRegistrations += orc == noErr;
801	if (orc != noErr)
802	LogRel(("CoreAudio: Failed to register sample rate changed listener (%#x)\n", orc));
803	#endif
804	return cRegistrations > 0;
805	}
806	return false;
807	}
808
809
810	/**
811	* Undoes what drvHstAudCaDeviceRegisterCallbacks() did.
812	*
813	* @param pThis The core audio driver instance data.
814	* @param idDevice The device ID to deregister callbacks for.
815	*/
816	static void drvHstAudCaDeviceUnregisterCallbacks(PDRVHOSTCOREAUDIO pThis, AudioObjectID idDevice)
817	{
818	if (idDevice != kAudioDeviceUnknown)
819	{
820	LogFunc(("idDevice=%RU32\n", idDevice));
821	AudioObjectPropertyAddress PropAddr =
822	{
823	kAudioDevicePropertyDeviceIsAlive,
824	kAudioObjectPropertyScopeGlobal,
825	kAudioObjectPropertyElementMaster
826	};
827	OSStatus orc;
828	orc = AudioObjectRemovePropertyListener(idDevice, &PropAddr, drvHstAudCaDeviceIsAliveChangedCallback, pThis);
829	if ( orc != noErr
830	&& orc != kAudioHardwareBadObjectError)
831	LogRel(("CoreAudio: Failed to remove the device alive listener (%#x)\n", orc));
832
833	#ifdef LOG_ENABLED
834	PropAddr.mSelector = kAudioDeviceProcessorOverload;
835	orc = AudioObjectRemovePropertyListener(idDevice, &PropAddr, drvHstAudCaDevicePropertyChangedCallback, pThis);
836	if ( orc != noErr
837	&& orc != kAudioHardwareBadObjectError)
838	LogRel(("CoreAudio: Failed to remove the recording processor overload listener (%#x)\n", orc));
839
840	PropAddr.mSelector = kAudioDevicePropertyNominalSampleRate;
841	orc = AudioObjectRemovePropertyListener(idDevice, &PropAddr, drvHstAudCaDevicePropertyChangedCallback, pThis);
842	if ( orc != noErr
843	&& orc != kAudioHardwareBadObjectError)
844	LogRel(("CoreAudio: Failed to remove the sample rate changed listener (%#x)\n", orc));
845	#endif
846	}
847	}
848
849
850	/**
851	* Updates the default device for one direction.
852	*
853	* @param pThis The core audio driver instance data.
854	* @param pDevice The device information to update.
855	* @param fInput Set if input device, clear if output.
856	* @param fNotify Whether to notify the parent driver if something
857	* changed.
858	*/
859	static void drvHstAudCaUpdateOneDefaultDevice(PDRVHOSTCOREAUDIO pThis, PDRVHSTAUDCADEVICE pDevice, bool fInput, bool fNotify)
860	{
861	/*
862	* Skip if there is a specific device we should use for this direction.
863	*/
864	if (pDevice->pszSpecific)
865	return;
866
867	/*
868	* Get the information before we enter the critical section.
869	*
870	* (Yeah, this may make us get things wrong if the defaults changes really
871	* fast and we get notifications in parallel on multiple threads. However,
872	* the first is a don't-do-that situation and the latter is unlikely.)
873	*/
874	AudioDeviceID idDefaultDev = kAudioDeviceUnknown;
875	if (!drvHstAudCaGetPropertyData(kAudioObjectSystemObject,
876	fInput ? kAudioHardwarePropertyDefaultInputDevice : kAudioHardwarePropertyDefaultOutputDevice,
877	kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster,
878	fInput ? "default input device" : "default output device",
879	&idDefaultDev, sizeof(idDefaultDev)))
880	idDefaultDev = kAudioDeviceUnknown;
881
882	CFStringRef hStrUid = NULL;
883	if (idDefaultDev != kAudioDeviceUnknown)
884	{
885	if (!drvHstAudCaGetPropertyData(idDefaultDev, kAudioDevicePropertyDeviceUID,
886	fInput ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
887	kAudioObjectPropertyElementMaster,
888	fInput ? "default input device UID" : "default output device UID",
889	&hStrUid, sizeof(hStrUid)))
890	hStrUid = NULL;
891	}
892	char szUid[128];
893	if (hStrUid)
894	drvHstAudCaCFStringToBuf(hStrUid, szUid, sizeof(szUid));
895	else
896	szUid[0] = '\0';
897
898	/*
899	* Grab the lock and do the updating.
900	*
901	* We're a little paranoid wrt the locking in case there turn out to be some kind
902	* of race around destruction (there really can't be, but better play safe).
903	*/
904	PPDMIHOSTAUDIOPORT pIHostAudioPort = NULL;
905
906	int rc = RTCritSectEnter(&pThis->CritSect);
907	AssertRC(rc);
908	if (RT_SUCCESS(rc))
909	{
910	if (idDefaultDev != pDevice->idDevice)
911	{
912	if (idDefaultDev != kAudioDeviceUnknown)
913	{
914	LogRel(("CoreAudio: Default %s device: %u (was %u), ID '%s'\n",
915	fInput ? "input" : "output", idDefaultDev, pDevice->idDevice, szUid));
916	pIHostAudioPort = fNotify ? pThis->pIHostAudioPort : NULL; /* (only if there is a new device) */
917	}
918	else
919	LogRel(("CoreAudio: Default %s device is gone (was %u)\n", fInput ? "input" : "output", pDevice->idDevice));
920
921	if (pDevice->hStrUid)
922	CFRelease(pDevice->hStrUid);
923	if (pDevice->fRegisteredListeners)
924	drvHstAudCaDeviceUnregisterCallbacks(pThis, pDevice->idDevice);
925	pDevice->hStrUid = hStrUid;
926	pDevice->idDevice = idDefaultDev;
927	pDevice->fRegisteredListeners = drvHstAudCaDeviceRegisterCallbacks(pThis, pDevice->idDevice);
928	hStrUid = NULL;
929	}
930	RTCritSectLeave(&pThis->CritSect);
931	}
932
933	if (hStrUid != NULL)
934	CFRelease(hStrUid);
935
936	/*
937	* Notify parent driver to trigger a re-init of any associated streams.
938	*/
939	if (pIHostAudioPort)
940	{
941	LogFlowFunc(("Notifying parent driver about %s default device change...\n", fInput ? "input" : "output"));
942	pIHostAudioPort->pfnNotifyDeviceChanged(pIHostAudioPort, fInput ? PDMAUDIODIR_IN : PDMAUDIODIR_OUT, NULL /pvUser/);
943	}
944	}
945
946
947	/**
948	* Sets the device to use in one or the other direction (@a fInput).
949	*
950	* @returns VBox status code.
951	* @param pThis The core audio driver instance data.
952	* @param pDevice The device info structure to update.
953	* @param fInput Set if input, clear if output.
954	* @param fNotify Whether to notify the parent driver if something
955	* changed.
956	* @param pszUid The UID string for the device to use. NULL or empty
957	* string if default should be used.
958	*/
959	static int drvHstAudCaSetDevice(PDRVHOSTCOREAUDIO pThis, PDRVHSTAUDCADEVICE pDevice, bool fInput, bool fNotify,
960	const char *pszUid)
961	{
962	if (!pszUid \|\| !*pszUid)
963	{
964	/*
965	* Use default. Always refresh the given default device.
966	*/
967	int rc = RTCritSectEnter(&pThis->CritSect);
968	AssertRCReturn(rc, rc);
969
970	if (pDevice->pszSpecific)
971	{
972	LogRel(("CoreAudio: Changing %s device from '%s' to default.\n", fInput ? "input" : "output", pDevice->pszSpecific));
973	RTStrFree(pDevice->pszSpecific);
974	pDevice->pszSpecific = NULL;
975	}
976
977	RTCritSectLeave(&pThis->CritSect);
978
979	drvHstAudCaUpdateOneDefaultDevice(pThis, pDevice, fInput, fNotify);
980	}
981	else
982	{
983	/*
984	* Use device specified by pszUid. If not change, search for the device
985	* again if idDevice is unknown.
986	*/
987	int rc = RTCritSectEnter(&pThis->CritSect);
988	AssertRCReturn(rc, rc);
989
990	bool fSkip = false;
991	bool fSame = false;
992	if (pDevice->pszSpecific)
993	{
994	if (strcmp(pszUid, pDevice->pszSpecific) != 0)
995	{
996	LogRel(("CoreAudio: Changing %s device from '%s' to '%s'.\n",
997	fInput ? "input" : "output", pDevice->pszSpecific, pszUid));
998	RTStrFree(pDevice->pszSpecific);
999	pDevice->pszSpecific = NULL;
1000	}
1001	else
1002	{
1003	fSkip = pDevice->idDevice != kAudioDeviceUnknown;
1004	fSame = true;
1005	}
1006	}
1007	else
1008	LogRel(("CoreAudio: Changing %s device from default to '%s'.\n", fInput ? "input" : "output", pszUid));
1009
1010	/*
1011	* Allocate and swap the strings. This is the bit that might fail.
1012	*/
1013	if (!fSame)
1014	{
1015	CFStringRef hStrUid = CFStringCreateWithBytes(NULL /allocator/, (UInt8 const *)pszUid, (CFIndex)strlen(pszUid),
1016	kCFStringEncodingUTF8, false /isExternalRepresentation/);
1017	char *pszSpecific = RTStrDup(pszUid);
1018	if (hStrUid && pszSpecific)
1019	{
1020	if (pDevice->hStrUid)
1021	CFRelease(pDevice->hStrUid);
1022	pDevice->hStrUid = hStrUid;
1023	RTStrFree(pDevice->pszSpecific);
1024	pDevice->pszSpecific = pszSpecific;
1025	}
1026	else
1027	{
1028	RTCritSectLeave(&pThis->CritSect);
1029
1030	LogFunc(("returns VERR_NO_STR_MEMORY!\n"));
1031	if (hStrUid)
1032	CFRelease(hStrUid);
1033	RTStrFree(pszSpecific);
1034	return VERR_NO_STR_MEMORY;
1035	}
1036
1037	if (pDevice->fRegisteredListeners)
1038	{
1039	drvHstAudCaDeviceUnregisterCallbacks(pThis, pDevice->idDevice);
1040	pDevice->fRegisteredListeners = false;
1041	}
1042	}
1043
1044	/*
1045	* Locate the device ID corresponding to the UID string.
1046	*/
1047	if (!fSkip)
1048	{
1049	pDevice->idDevice = drvHstAudCaDeviceUidToId(pDevice->hStrUid, pszUid, fInput ? "input" : "output");
1050	pDevice->fRegisteredListeners = drvHstAudCaDeviceRegisterCallbacks(pThis, pDevice->idDevice);
1051	}
1052
1053	PPDMIHOSTAUDIOPORT pIHostAudioPort = fNotify && !fSame ? pThis->pIHostAudioPort : NULL;
1054	RTCritSectLeave(&pThis->CritSect);
1055
1056	/*
1057	* Notify parent driver to trigger a re-init of any associated streams.
1058	*/
1059	if (pIHostAudioPort)
1060	{
1061	LogFlowFunc(("Notifying parent driver about %s device change...\n", fInput ? "input" : "output"));
1062	pIHostAudioPort->pfnNotifyDeviceChanged(pIHostAudioPort, fInput ? PDMAUDIODIR_IN : PDMAUDIODIR_OUT, NULL /pvUser/);
1063	}
1064	}
1065	return VINF_SUCCESS;
1066	}
1067
1068
1069	/*********************************************************************************************************************************
1070	* Worker Thread *
1071	*********************************************************************************************************************************/
1072	#ifdef CORE_AUDIO_WITH_WORKER_THREAD
1073
1074	/**
1075	* Message handling callback for CFMachPort.
1076	*/
1077	static void drvHstAudCaThreadPortCallback(CFMachPortRef hPort, void pvMsg, CFIndex cbMsg, void pvUser)
1078	{
1079	RT_NOREF(hPort, pvMsg, cbMsg, pvUser);
1080	LogFunc(("hPort=%p pvMsg=%p cbMsg=%#x pvUser=%p\n", hPort, pvMsg, cbMsg, pvUser));
1081	}
1082
1083
1084	/**
1085	* @callback_method_impl{FNRTTHREAD, Worker thread for buffer callbacks.}
1086	*/
1087	static DECLCALLBACK(int) drvHstAudCaThread(RTTHREAD hThreadSelf, void *pvUser)
1088	{
1089	PDRVHOSTCOREAUDIO pThis = (PDRVHOSTCOREAUDIO)pvUser;
1090
1091	/*
1092	* Get the runloop, add the mach port to it and signal the constructor thread that we're ready.
1093	*/
1094	pThis->hThreadRunLoop = CFRunLoopGetCurrent();
1095	CFRetain(pThis->hThreadRunLoop);
1096
1097	CFRunLoopAddSource(pThis->hThreadRunLoop, pThis->hThreadPortSrc, kCFRunLoopDefaultMode);
1098
1099	int rc = RTThreadUserSignal(hThreadSelf);
1100	AssertRCReturn(rc, rc);
1101
1102	/*
1103	* Do work.
1104	*/
1105	for (;;)
1106	{
1107	SInt32 rcRunLoop = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 30.0, TRUE);
1108	Log8Func(("CFRunLoopRunInMode -> %d\n", rcRunLoop));
1109	Assert(rcRunLoop != kCFRunLoopRunFinished);
1110	if (rcRunLoop != kCFRunLoopRunStopped && rcRunLoop != kCFRunLoopRunFinished)
1111	{ /* likely */ }
1112	else
1113	break;
1114	}
1115
1116	/*
1117	* Clean up.
1118	*/
1119	CFRunLoopRemoveSource(pThis->hThreadRunLoop, pThis->hThreadPortSrc, kCFRunLoopDefaultMode);
1120	LogFunc(("The thread quits!\n"));
1121	return VINF_SUCCESS;
1122	}
1123
1124	#endif /* CORE_AUDIO_WITH_WORKER_THREAD */
1125
1126
1127
1128	/*********************************************************************************************************************************
1129	* PDMIHOSTAUDIO *
1130	*********************************************************************************************************************************/
1131
1132	/**
1133	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetConfig}
1134	*/
1135	static DECLCALLBACK(int) drvHstAudCaHA_GetConfig(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDCFG pBackendCfg)
1136	{
1137	PDRVHOSTCOREAUDIO pThis = RT_FROM_MEMBER(pInterface, DRVHOSTCOREAUDIO, IHostAudio);
1138	AssertPtrReturn(pBackendCfg, VERR_INVALID_POINTER);
1139
1140	/*
1141	* Fill in the config structure.
1142	*/
1143	RTStrCopy(pBackendCfg->szName, sizeof(pBackendCfg->szName), "Core Audio");
1144	pBackendCfg->cbStream = sizeof(COREAUDIOSTREAM);
1145	pBackendCfg->fFlags = PDMAUDIOBACKEND_F_ASYNC_STREAM_DESTROY;
1146
1147	RTCritSectEnter(&pThis->CritSect);
1148	#if 0 /** @todo r=bird: This looks like complete utter non-sense to me. */
1149	/* For Core Audio we provide one stream per device for now. */
1150	pBackendCfg->cMaxStreamsIn = PDMAudioHostEnumCountMatching(&pThis->Devices, PDMAUDIODIR_IN);
1151	pBackendCfg->cMaxStreamsOut = PDMAudioHostEnumCountMatching(&pThis->Devices, PDMAUDIODIR_OUT);
1152	#else
1153	pBackendCfg->cMaxStreamsIn = UINT32_MAX;
1154	pBackendCfg->cMaxStreamsOut = UINT32_MAX;
1155	#endif
1156	RTCritSectLeave(&pThis->CritSect);
1157
1158	LogFlowFunc(("Returning %Rrc\n", VINF_SUCCESS));
1159	return VINF_SUCCESS;
1160	}
1161
1162
1163	/**
1164	* Creates an enumeration of the host's playback and capture devices.
1165	*
1166	* @returns VBox status code.
1167	* @param pDevEnm Where to store the enumerated devices. Caller is
1168	* expected to clean this up on failure, if so desired.
1169	*
1170	* @note Handling of out-of-memory conditions isn't perhaps as good as it
1171	* could be, but it was done so to make the drvHstAudCaGetPropertyData*
1172	* functions as uncomplicated as possible.
1173	*/
1174	static int drvHstAudCaDevicesEnumerateAll(PPDMAUDIOHOSTENUM pDevEnm)
1175	{
1176	AssertPtr(pDevEnm);
1177
1178	/*
1179	* First get the UIDs for the default devices.
1180	*/
1181	AudioDeviceID idDefaultDevIn = kAudioDeviceUnknown;
1182	if (!drvHstAudCaGetPropertyData(kAudioObjectSystemObject, kAudioHardwarePropertyDefaultInputDevice,
1183	kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster,
1184	"default input device", &idDefaultDevIn, sizeof(idDefaultDevIn)))
1185	idDefaultDevIn = kAudioDeviceUnknown;
1186	if (idDefaultDevIn == kAudioDeviceUnknown)
1187	LogFunc(("No default input device\n"));
1188
1189	AudioDeviceID idDefaultDevOut = kAudioDeviceUnknown;
1190	if (!drvHstAudCaGetPropertyData(kAudioObjectSystemObject, kAudioHardwarePropertyDefaultOutputDevice,
1191	kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster,
1192	"default output device", &idDefaultDevOut, sizeof(idDefaultDevOut)))
1193	idDefaultDevOut = kAudioDeviceUnknown;
1194	if (idDefaultDevOut == kAudioDeviceUnknown)
1195	LogFunc(("No default output device\n"));
1196
1197	/*
1198	* Get a list of all audio devices.
1199	* (We have to retry as the we may race new devices being inserted.)
1200	*/
1201	UInt32 cDevices = 0;
1202	AudioDeviceID *paidDevices
1203	= (AudioDeviceID *)drvHstAudCaGetPropertyDataEx(kAudioObjectSystemObject, kAudioHardwarePropertyDevices,
1204	kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster,
1205	"devices", &cDevices);
1206	cDevices /= sizeof(paidDevices[0]);
1207
1208	/*
1209	* Try get details on each device and try add them to the enumeration result.
1210	*/
1211	for (uint32_t i = 0; i < cDevices; i++)
1212	{
1213	AudioDeviceID const idDevice = paidDevices[i];
1214
1215	/*
1216	* Allocate a new device entry and populate it.
1217	*
1218	* The only relevant information here is channel counts and the UID(s),
1219	* everything else is just extras we can live without.
1220	*/
1221	PCOREAUDIODEVICEDATA pDevEntry = (PCOREAUDIODEVICEDATA)PDMAudioHostDevAlloc(sizeof(*pDevEntry), 0, 0);
1222	AssertReturnStmt(pDevEntry, RTMemTmpFree(paidDevices), VERR_NO_MEMORY);
1223
1224	pDevEntry->idDevice = idDevice;
1225	if (idDevice != kAudioDeviceUnknown)
1226	{
1227	if (idDevice == idDefaultDevIn)
1228	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_DEFAULT_IN;
1229	if (idDevice == idDefaultDevOut)
1230	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_DEFAULT_OUT;
1231	}
1232
1233	/* Count channels and determin the usage. */
1234	pDevEntry->Core.cMaxInputChannels = drvHstAudCaEnumCountChannels(idDevice, kAudioDevicePropertyScopeInput);
1235	pDevEntry->Core.cMaxOutputChannels = drvHstAudCaEnumCountChannels(idDevice, kAudioDevicePropertyScopeOutput);
1236	if (pDevEntry->Core.cMaxInputChannels > 0 && pDevEntry->Core.cMaxOutputChannels > 0)
1237	pDevEntry->Core.enmUsage = PDMAUDIODIR_DUPLEX;
1238	else if (pDevEntry->Core.cMaxInputChannels > 0)
1239	pDevEntry->Core.enmUsage = PDMAUDIODIR_IN;
1240	else if (pDevEntry->Core.cMaxOutputChannels > 0)
1241	pDevEntry->Core.enmUsage = PDMAUDIODIR_OUT;
1242	else
1243	{
1244	pDevEntry->Core.enmUsage = PDMAUDIODIR_UNKNOWN;
1245	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_IGNORE;
1246	/** @todo drop & skip? */
1247	}
1248
1249	/* Get the device UID. (We ASSUME this is the same for both input and
1250	output sides of the device.) */
1251	CFStringRef hStrUid;
1252	if (!drvHstAudCaGetPropertyData(idDevice, kAudioDevicePropertyDeviceUID, kAudioDevicePropertyDeviceUID,
1253	kAudioObjectPropertyElementMaster,
1254	"device UID", &hStrUid, sizeof(hStrUid)))
1255	hStrUid = NULL;
1256
1257	if (hStrUid)
1258	{
1259	pDevEntry->Core.pszId = drvHstAudCaCFStringToHeap(hStrUid);
1260	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_ID_ALLOC;
1261	}
1262	else
1263	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_IGNORE;
1264
1265	/* Get the device name (ignore failures). */
1266	CFStringRef hStrName = NULL;
1267	if (drvHstAudCaGetPropertyData(idDevice, kAudioObjectPropertyName,
1268	pDevEntry->Core.enmUsage == PDMAUDIODIR_IN
1269	? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
1270	kAudioObjectPropertyElementMaster, "device name", &hStrName, sizeof(hStrName)))
1271	{
1272	pDevEntry->Core.pszName = drvHstAudCaCFStringToHeap(hStrName);
1273	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_NAME_ALLOC;
1274	CFRelease(hStrName);
1275	}
1276
1277	/* Check if the device is alive for the intended usage. For duplex
1278	devices we'll flag it as dead if either of the directions are dead,
1279	as there is no convenient way of saying otherwise. It's acadmic as
1280	nobody currently 2021-05-22) uses the flag for anything. */
1281	UInt32 fAlive = 0;
1282	if (drvHstAudCaGetPropertyData(idDevice, kAudioDevicePropertyDeviceIsAlive,
1283	pDevEntry->Core.enmUsage == PDMAUDIODIR_IN
1284	? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
1285	kAudioObjectPropertyElementMaster, "is-alive", &fAlive, sizeof(fAlive)))
1286	if (!fAlive)
1287	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_DEAD;
1288	fAlive = 0;
1289	if ( pDevEntry->Core.enmUsage == PDMAUDIODIR_DUPLEX
1290	&& !(pDevEntry->Core.fFlags == PDMAUDIOHOSTDEV_F_DEAD)
1291	&& drvHstAudCaGetPropertyData(idDevice, kAudioDevicePropertyDeviceIsAlive, kAudioDevicePropertyScopeInput,
1292	kAudioObjectPropertyElementMaster, "is-alive", &fAlive, sizeof(fAlive)))
1293	if (!fAlive)
1294	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_DEAD;
1295
1296	/* Check if the device is being hogged by someone else. */
1297	pid_t pidHogger = -2;
1298	if (drvHstAudCaGetPropertyData(idDevice, kAudioDevicePropertyHogMode, kAudioObjectPropertyScopeGlobal,
1299	kAudioObjectPropertyElementMaster, "hog-mode", &pidHogger, sizeof(pidHogger)))
1300	if (pidHogger >= 0)
1301	pDevEntry->Core.fFlags \|= PDMAUDIOHOSTDEV_F_LOCKED;
1302
1303	/*
1304	* Try make sure we've got a name... Only add it to the enumeration if we have one.
1305	*/
1306	if (!pDevEntry->Core.pszName)
1307	{
1308	pDevEntry->Core.pszName = pDevEntry->Core.pszId;
1309	pDevEntry->Core.fFlags &= ~PDMAUDIOHOSTDEV_F_NAME_ALLOC;
1310	}
1311
1312	if (pDevEntry->Core.pszName)
1313	PDMAudioHostEnumAppend(pDevEnm, &pDevEntry->Core);
1314	else
1315	PDMAudioHostDevFree(&pDevEntry->Core);
1316	}
1317
1318	RTMemTmpFree(paidDevices);
1319
1320	LogFunc(("Returning %u devices\n", pDevEnm->cDevices));
1321	PDMAudioHostEnumLog(pDevEnm, "Core Audio");
1322	return VINF_SUCCESS;
1323	}
1324
1325
1326	/**
1327	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetDevices}
1328	*/
1329	static DECLCALLBACK(int) drvHstAudCaHA_GetDevices(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHOSTENUM pDeviceEnum)
1330	{
1331	RT_NOREF(pInterface);
1332	AssertPtrReturn(pDeviceEnum, VERR_INVALID_POINTER);
1333
1334	PDMAudioHostEnumInit(pDeviceEnum);
1335	int rc = drvHstAudCaDevicesEnumerateAll(pDeviceEnum);
1336	if (RT_FAILURE(rc))
1337	PDMAudioHostEnumDelete(pDeviceEnum);
1338
1339	LogFlowFunc(("returns %Rrc\n", rc));
1340	return rc;
1341	}
1342
1343
1344	/**
1345	* @interface_method_impl{PDMIHOSTAUDIO,pfnSetDevice}
1346	*/
1347	static DECLCALLBACK(int) drvHstAudCaHA_SetDevice(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir, const char *pszId)
1348	{
1349	PDRVHOSTCOREAUDIO pThis = RT_FROM_MEMBER(pInterface, DRVHOSTCOREAUDIO, IHostAudio);
1350	AssertPtrNullReturn(pszId, VERR_INVALID_POINTER);
1351	if (pszId && !*pszId)
1352	pszId = NULL;
1353	AssertMsgReturn(enmDir == PDMAUDIODIR_IN \|\| enmDir == PDMAUDIODIR_OUT \|\| enmDir == PDMAUDIODIR_DUPLEX,
1354	("enmDir=%d\n", enmDir, pszId), VERR_INVALID_PARAMETER);
1355
1356	/*
1357	* Make the change.
1358	*/
1359	int rc = VINF_SUCCESS;
1360	if (enmDir == PDMAUDIODIR_IN \|\| enmDir == PDMAUDIODIR_DUPLEX)
1361	rc = drvHstAudCaSetDevice(pThis, &pThis->InputDevice, true /fInput/, true /fNotify/, pszId);
1362	if (enmDir == PDMAUDIODIR_OUT \|\| (enmDir == PDMAUDIODIR_DUPLEX && RT_SUCCESS(rc)))
1363	rc = drvHstAudCaSetDevice(pThis, &pThis->OutputDevice, false /fInput/, true /fNotify/, pszId);
1364
1365	LogFlowFunc(("returns %Rrc\n", rc));
1366	return rc;
1367	}
1368
1369
1370	/**
1371	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetStatus}
1372	*/
1373	static DECLCALLBACK(PDMAUDIOBACKENDSTS) drvHstAudCaHA_GetStatus(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir)
1374	{
1375	RT_NOREF(pInterface, enmDir);
1376	return PDMAUDIOBACKENDSTS_RUNNING;
1377	}
1378
1379
1380	/**
1381	* Marks the given buffer as queued or not-queued.
1382	*
1383	* @returns Old queued value.
1384	* @param pAudioBuffer The buffer.
1385	* @param fQueued The new queued state.
1386	*/
1387	DECLINLINE(bool) drvHstAudCaSetBufferQueued(AudioQueueBufferRef pAudioBuffer, bool fQueued)
1388	{
1389	if (fQueued)
1390	return ASMAtomicBitTestAndSet(&pAudioBuffer->mUserData, 0);
1391	return ASMAtomicBitTestAndClear(&pAudioBuffer->mUserData, 0);
1392	}
1393
1394
1395	/**
1396	* Gets the queued state of the buffer.
1397	* @returns true if queued, false if not.
1398	* @param pAudioBuffer The buffer.
1399	*/
1400	DECLINLINE(bool) drvHstAudCaIsBufferQueued(AudioQueueBufferRef pAudioBuffer)
1401	{
1402	return ((uintptr_t)pAudioBuffer->mUserData & 1) == 1;
1403	}
1404
1405
1406	/**
1407	* Output audio queue buffer callback.
1408	*
1409	* Called whenever an audio queue is done processing a buffer. This routine
1410	* will set the data fill size to zero and mark it as unqueued so that
1411	* drvHstAudCaHA_StreamPlay knowns it can use it.
1412	*
1413	* @param pvUser User argument.
1414	* @param hAudioQueue Audio queue to process output data for.
1415	* @param pAudioBuffer Audio buffer to store output data in.
1416	*
1417	* @thread queue thread.
1418	*/
1419	static void drvHstAudCaOutputQueueBufferCallback(void *pvUser, AudioQueueRef hAudioQueue, AudioQueueBufferRef pAudioBuffer)
1420	{
1421	#if defined(VBOX_STRICT) \|\| defined(LOG_ENABLED)
1422	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pvUser;
1423	AssertPtr(pStreamCA);
1424	Assert(pStreamCA->hAudioQueue == hAudioQueue);
1425
1426	uintptr_t idxBuf = (uintptr_t)pAudioBuffer->mUserData >> 8;
1427	Log4Func(("Got back buffer #%zu (%p)\n", idxBuf, pAudioBuffer));
1428	AssertReturnVoid( idxBuf < pStreamCA->cBuffers
1429	&& pStreamCA->paBuffers[idxBuf].pBuf == pAudioBuffer);
1430	#endif
1431
1432	pAudioBuffer->mAudioDataByteSize = 0;
1433	bool fWasQueued = drvHstAudCaSetBufferQueued(pAudioBuffer, false /fQueued/);
1434	Assert(!drvHstAudCaIsBufferQueued(pAudioBuffer));
1435	Assert(fWasQueued); RT_NOREF(fWasQueued);
1436
1437	RT_NOREF(pvUser, hAudioQueue);
1438	}
1439
1440
1441	/**
1442	* Input audio queue buffer callback.
1443	*
1444	* Called whenever input data from the audio queue becomes available. This
1445	* routine will mark the buffer unqueued so that drvHstAudCaHA_StreamCapture can
1446	* read the data from it.
1447	*
1448	* @param pvUser User argument.
1449	* @param hAudioQueue Audio queue to process input data from.
1450	* @param pAudioBuffer Audio buffer to process input data from.
1451	* @param pAudioTS Audio timestamp.
1452	* @param cPacketDesc Number of packet descriptors.
1453	* @param paPacketDesc Array of packet descriptors.
1454	*/
1455	static void drvHstAudCaInputQueueBufferCallback(void *pvUser, AudioQueueRef hAudioQueue,
1456	AudioQueueBufferRef pAudioBuffer, const AudioTimeStamp *pAudioTS,
1457	UInt32 cPacketDesc, const AudioStreamPacketDescription *paPacketDesc)
1458	{
1459	#if defined(VBOX_STRICT) \|\| defined(LOG_ENABLED)
1460	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pvUser;
1461	AssertPtr(pStreamCA);
1462	Assert(pStreamCA->hAudioQueue == hAudioQueue);
1463
1464	uintptr_t idxBuf = (uintptr_t)pAudioBuffer->mUserData >> 8;
1465	Log4Func(("Got back buffer #%zu (%p) with %#x bytes\n", idxBuf, pAudioBuffer, pAudioBuffer->mAudioDataByteSize));
1466	AssertReturnVoid( idxBuf < pStreamCA->cBuffers
1467	&& pStreamCA->paBuffers[idxBuf].pBuf == pAudioBuffer);
1468	#endif
1469
1470	bool fWasQueued = drvHstAudCaSetBufferQueued(pAudioBuffer, false /fQueued/);
1471	Assert(!drvHstAudCaIsBufferQueued(pAudioBuffer));
1472	Assert(fWasQueued); RT_NOREF(fWasQueued);
1473
1474	RT_NOREF(pvUser, hAudioQueue, pAudioTS, cPacketDesc, paPacketDesc);
1475	}
1476
1477
1478	static void drvHstAudCaLogAsbd(const char pszDesc, const AudioStreamBasicDescription pASBD)
1479	{
1480	LogRel2(("CoreAudio: %s description:\n", pszDesc));
1481	LogRel2(("CoreAudio: Format ID: %#RX32 (%c%c%c%c)\n", pASBD->mFormatID,
1482	RT_BYTE4(pASBD->mFormatID), RT_BYTE3(pASBD->mFormatID),
1483	RT_BYTE2(pASBD->mFormatID), RT_BYTE1(pASBD->mFormatID)));
1484	LogRel2(("CoreAudio: Flags: %#RX32", pASBD->mFormatFlags));
1485	if (pASBD->mFormatFlags & kAudioFormatFlagIsFloat)
1486	LogRel2((" Float"));
1487	if (pASBD->mFormatFlags & kAudioFormatFlagIsBigEndian)
1488	LogRel2((" BigEndian"));
1489	if (pASBD->mFormatFlags & kAudioFormatFlagIsSignedInteger)
1490	LogRel2((" SignedInteger"));
1491	if (pASBD->mFormatFlags & kAudioFormatFlagIsPacked)
1492	LogRel2((" Packed"));
1493	if (pASBD->mFormatFlags & kAudioFormatFlagIsAlignedHigh)
1494	LogRel2((" AlignedHigh"));
1495	if (pASBD->mFormatFlags & kAudioFormatFlagIsNonInterleaved)
1496	LogRel2((" NonInterleaved"));
1497	if (pASBD->mFormatFlags & kAudioFormatFlagIsNonMixable)
1498	LogRel2((" NonMixable"));
1499	if (pASBD->mFormatFlags & kAudioFormatFlagsAreAllClear)
1500	LogRel2((" AllClear"));
1501	LogRel2(("\n"));
1502	LogRel2(("CoreAudio: SampleRate : %RU64.%02u Hz\n",
1503	(uint64_t)pASBD->mSampleRate, (unsigned)(pASBD->mSampleRate * 100) % 100));
1504	LogRel2(("CoreAudio: ChannelsPerFrame: %RU32\n", pASBD->mChannelsPerFrame));
1505	LogRel2(("CoreAudio: FramesPerPacket : %RU32\n", pASBD->mFramesPerPacket));
1506	LogRel2(("CoreAudio: BitsPerChannel : %RU32\n", pASBD->mBitsPerChannel));
1507	LogRel2(("CoreAudio: BytesPerFrame : %RU32\n", pASBD->mBytesPerFrame));
1508	LogRel2(("CoreAudio: BytesPerPacket : %RU32\n", pASBD->mBytesPerPacket));
1509	}
1510
1511
1512	static void drvHstAudCaPropsToAsbd(PCPDMAUDIOPCMPROPS pProps, AudioStreamBasicDescription *pASBD)
1513	{
1514	AssertPtrReturnVoid(pProps);
1515	AssertPtrReturnVoid(pASBD);
1516
1517	RT_BZERO(pASBD, sizeof(AudioStreamBasicDescription));
1518
1519	pASBD->mFormatID = kAudioFormatLinearPCM;
1520	pASBD->mFormatFlags = kAudioFormatFlagIsPacked;
1521	if (pProps->fSigned)
1522	pASBD->mFormatFlags \|= kAudioFormatFlagIsSignedInteger;
1523	if (PDMAudioPropsIsBigEndian(pProps))
1524	pASBD->mFormatFlags \|= kAudioFormatFlagIsBigEndian;
1525	pASBD->mSampleRate = PDMAudioPropsHz(pProps);
1526	pASBD->mChannelsPerFrame = PDMAudioPropsChannels(pProps);
1527	pASBD->mBitsPerChannel = PDMAudioPropsSampleBits(pProps);
1528	pASBD->mBytesPerFrame = PDMAudioPropsFrameSize(pProps);
1529	pASBD->mFramesPerPacket = 1; /* For uncompressed audio, set this to 1. */
1530	pASBD->mBytesPerPacket = PDMAudioPropsFrameSize(pProps) * pASBD->mFramesPerPacket;
1531	}
1532
1533
1534	/**
1535	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCreate}
1536	*/
1537	static DECLCALLBACK(int) drvHstAudCaHA_StreamCreate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
1538	PCPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
1539	{
1540	PDRVHOSTCOREAUDIO pThis = RT_FROM_MEMBER(pInterface, DRVHOSTCOREAUDIO, IHostAudio);
1541	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
1542	AssertPtrReturn(pStreamCA, VERR_INVALID_POINTER);
1543	AssertPtrReturn(pCfgReq, VERR_INVALID_POINTER);
1544	AssertPtrReturn(pCfgAcq, VERR_INVALID_POINTER);
1545	AssertReturn(pCfgReq->enmDir == PDMAUDIODIR_IN \|\| pCfgReq->enmDir == PDMAUDIODIR_OUT, VERR_INVALID_PARAMETER);
1546	int rc;
1547
1548	/** @todo This takes too long. Stats indicates it may take up to 200 ms.
1549	* Knoppix guest resets the stream and we hear nada because the
1550	* draining is aborted when the stream is destroyed. Should try use
1551	* async init for parts (much) of this. */
1552
1553	/*
1554	* Permission check for input devices before we start.
1555	*/
1556	if (pCfgReq->enmDir == PDMAUDIODIR_IN)
1557	{
1558	rc = coreAudioInputPermissionCheck();
1559	if (RT_FAILURE(rc))
1560	return rc;
1561	}
1562
1563	/*
1564	* Do we have a device for the requested stream direction?
1565	*/
1566	RTCritSectEnter(&pThis->CritSect);
1567	CFStringRef hDevUidStr = pCfgReq->enmDir == PDMAUDIODIR_IN ? pThis->InputDevice.hStrUid : pThis->OutputDevice.hStrUid;
1568	if (hDevUidStr)
1569	CFRetain(hDevUidStr);
1570	RTCritSectLeave(&pThis->CritSect);
1571
1572	#ifdef LOG_ENABLED
1573	char szTmp[PDMAUDIOSTRMCFGTOSTRING_MAX];
1574	#endif
1575	LogFunc(("hDevUidStr=%p *pCfgReq: %s\n", hDevUidStr, PDMAudioStrmCfgToString(pCfgReq, szTmp, sizeof(szTmp)) ));
1576	if (hDevUidStr)
1577	{
1578	/*
1579	* Basic structure init.
1580	*/
1581	pStreamCA->fEnabled = false;
1582	pStreamCA->fStarted = false;
1583	pStreamCA->fDraining = false;
1584	pStreamCA->fRestartOnResume = false;
1585	pStreamCA->offInternal = 0;
1586	pStreamCA->idxBuffer = 0;
1587	pStreamCA->enmInitState = COREAUDIOINITSTATE_IN_INIT;
1588
1589	rc = RTCritSectInit(&pStreamCA->CritSect);
1590	if (RT_SUCCESS(rc))
1591	{
1592	/*
1593	* Do format conversion and create the circular buffer we use to shuffle
1594	* data to/from the queue thread.
1595	*/
1596	PDMAudioStrmCfgCopy(&pStreamCA->Cfg, pCfgReq);
1597	drvHstAudCaPropsToAsbd(&pCfgReq->Props, &pStreamCA->BasicStreamDesc);
1598	/** @todo Do some validation? */
1599	drvHstAudCaLogAsbd(pCfgReq->enmDir == PDMAUDIODIR_IN ? "Capturing queue format" : "Playback queue format",
1600	&pStreamCA->BasicStreamDesc);
1601	/*
1602	* Create audio queue.
1603	*
1604	* Documentation says the callbacks will be run on some core audio
1605	* related thread if we don't specify a runloop here. That's simpler.
1606	*/
1607	#ifdef CORE_AUDIO_WITH_WORKER_THREAD
1608	CFRunLoopRef const hRunLoop = pThis->hThreadRunLoop;
1609	CFStringRef const hRunLoopMode = kCFRunLoopDefaultMode;
1610	#else
1611	CFRunLoopRef const hRunLoop = NULL;
1612	CFStringRef const hRunLoopMode = NULL;
1613	#endif
1614	OSStatus orc;
1615	if (pCfgReq->enmDir == PDMAUDIODIR_OUT)
1616	orc = AudioQueueNewOutput(&pStreamCA->BasicStreamDesc, drvHstAudCaOutputQueueBufferCallback, pStreamCA,
1617	hRunLoop, hRunLoopMode, 0 /fFlags - MBZ/, &pStreamCA->hAudioQueue);
1618	else
1619	orc = AudioQueueNewInput(&pStreamCA->BasicStreamDesc, drvHstAudCaInputQueueBufferCallback, pStreamCA,
1620	hRunLoop, hRunLoopMode, 0 /fFlags - MBZ/, &pStreamCA->hAudioQueue);
1621	LogFlowFunc(("AudioQueueNew%s -> %#x\n", pCfgReq->enmDir == PDMAUDIODIR_OUT ? "Output" : "Input", orc));
1622	if (orc == noErr)
1623	{
1624	/*
1625	* Assign device to the queue.
1626	*/
1627	UInt32 uSize = sizeof(hDevUidStr);
1628	orc = AudioQueueSetProperty(pStreamCA->hAudioQueue, kAudioQueueProperty_CurrentDevice, &hDevUidStr, uSize);
1629	LogFlowFunc(("AudioQueueSetProperty -> %#x\n", orc));
1630	if (orc == noErr)
1631	{
1632	/*
1633	* Sanity-adjust the requested buffer size.
1634	*/
1635	uint32_t cFramesBufferSizeMax = PDMAudioPropsMilliToFrames(&pStreamCA->Cfg.Props, 2 * RT_MS_1SEC);
1636	uint32_t cFramesBufferSize = PDMAudioPropsMilliToFrames(&pStreamCA->Cfg.Props, 32 /ms/);
1637	cFramesBufferSize = RT_MAX(cFramesBufferSize, pCfgReq->Backend.cFramesBufferSize);
1638	cFramesBufferSize = RT_MIN(cFramesBufferSize, cFramesBufferSizeMax);
1639
1640	/*
1641	* The queue buffers size is based on cMsSchedulingHint so that we're likely to
1642	* have a new one ready/done after each guest DMA transfer. We must however
1643	* make sure we don't end up with too may or too few.
1644	*/
1645	Assert(pCfgReq->Device.cMsSchedulingHint > 0);
1646	uint32_t cFramesQueueBuffer = PDMAudioPropsMilliToFrames(&pStreamCA->Cfg.Props,
1647	pCfgReq->Device.cMsSchedulingHint > 0
1648	? pCfgReq->Device.cMsSchedulingHint : 10);
1649	uint32_t cQueueBuffers;
1650	if (cFramesQueueBuffer * COREAUDIO_MIN_BUFFERS <= cFramesBufferSize)
1651	{
1652	cQueueBuffers = cFramesBufferSize / cFramesQueueBuffer;
1653	if (cQueueBuffers > COREAUDIO_MAX_BUFFERS)
1654	{
1655	cQueueBuffers = COREAUDIO_MAX_BUFFERS;
1656	cFramesQueueBuffer = cFramesBufferSize / COREAUDIO_MAX_BUFFERS;
1657	}
1658	}
1659	else
1660	{
1661	cQueueBuffers = COREAUDIO_MIN_BUFFERS;
1662	cFramesQueueBuffer = cFramesBufferSize / COREAUDIO_MIN_BUFFERS;
1663	}
1664
1665	cFramesBufferSize = cQueueBuffers * cFramesBufferSize;
1666
1667	/*
1668	* Allocate the audio queue buffers.
1669	*/
1670	pStreamCA->paBuffers = (PCOREAUDIOBUF)RTMemAllocZ(sizeof(pStreamCA->paBuffers[0]) * cQueueBuffers);
1671	if (pStreamCA->paBuffers != NULL)
1672	{
1673	pStreamCA->cBuffers = cQueueBuffers;
1674
1675	const size_t cbQueueBuffer = PDMAudioPropsFramesToBytes(&pStreamCA->Cfg.Props, cFramesQueueBuffer);
1676	LogFlowFunc(("Allocating %u, each %#x bytes / %u frames\n", cQueueBuffers, cbQueueBuffer, cFramesQueueBuffer));
1677	cFramesBufferSize = 0;
1678	for (uint32_t iBuf = 0; iBuf < cQueueBuffers; iBuf++)
1679	{
1680	AudioQueueBufferRef pBuf = NULL;
1681	orc = AudioQueueAllocateBuffer(pStreamCA->hAudioQueue, cbQueueBuffer, &pBuf);
1682	if (RT_LIKELY(orc == noErr))
1683	{
1684	pBuf->mUserData = (void )(uintptr_t)(iBuf << 8); / bit zero is the queued-indicator. */
1685	pStreamCA->paBuffers[iBuf].pBuf = pBuf;
1686	cFramesBufferSize += PDMAudioPropsBytesToFrames(&pStreamCA->Cfg.Props,
1687	pBuf->mAudioDataBytesCapacity);
1688	Assert(PDMAudioPropsIsSizeAligned(&pStreamCA->Cfg.Props, pBuf->mAudioDataBytesCapacity));
1689	}
1690	else
1691	{
1692	LogRel(("CoreAudio: Out of memory (buffer %#x out of %#x, %#x bytes)\n",
1693	iBuf, cQueueBuffers, cbQueueBuffer));
1694	while (iBuf-- > 0)
1695	{
1696	AudioQueueFreeBuffer(pStreamCA->hAudioQueue, pStreamCA->paBuffers[iBuf].pBuf);
1697	pStreamCA->paBuffers[iBuf].pBuf = NULL;
1698	}
1699	break;
1700	}
1701	}
1702	if (orc == noErr)
1703	{
1704	/*
1705	* Update the stream config.
1706	*/
1707	pStreamCA->Cfg.Backend.cFramesBufferSize = cFramesBufferSize;
1708	pStreamCA->Cfg.Backend.cFramesPeriod = cFramesQueueBuffer; /* whatever */
1709	pStreamCA->Cfg.Backend.cFramesPreBuffering = pStreamCA->Cfg.Backend.cFramesPreBuffering
1710	* pStreamCA->Cfg.Backend.cFramesBufferSize
1711	/ RT_MAX(pCfgReq->Backend.cFramesBufferSize, 1);
1712
1713	PDMAudioStrmCfgCopy(pCfgAcq, &pStreamCA->Cfg);
1714
1715	ASMAtomicWriteU32(&pStreamCA->enmInitState, COREAUDIOINITSTATE_INIT);
1716
1717	LogFunc(("returns VINF_SUCCESS\n"));
1718	CFRelease(hDevUidStr);
1719	return VINF_SUCCESS;
1720	}
1721
1722	RTMemFree(pStreamCA->paBuffers);
1723	}
1724	else
1725	rc = VERR_NO_MEMORY;
1726	}
1727	else
1728	LogRelMax(64, ("CoreAudio: Failed to associate device with queue: %#x (%d)\n", orc, orc));
1729	AudioQueueDispose(pStreamCA->hAudioQueue, TRUE /inImmediate/);
1730	}
1731	else
1732	LogRelMax(64, ("CoreAudio: Failed to create audio queue: %#x (%d)\n", orc, orc));
1733	RTCritSectDelete(&pStreamCA->CritSect);
1734	}
1735	else
1736	LogRel(("CoreAudio: Failed to initialize critical section for stream: %Rrc\n", rc));
1737	CFRelease(hDevUidStr);
1738	}
1739	else
1740	{
1741	LogRelMax(64, ("CoreAudio: No device for %s stream.\n", PDMAudioDirGetName(pCfgReq->enmDir)));
1742	rc = VERR_AUDIO_STREAM_COULD_NOT_CREATE;
1743	}
1744
1745	LogFunc(("returns %Rrc\n", rc));
1746	return rc;
1747	}
1748
1749
1750	/**
1751	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDestroy}
1752	*/
1753	static DECLCALLBACK(int) drvHstAudCaHA_StreamDestroy(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream, bool fImmediate)
1754	{
1755	RT_NOREF(pInterface);
1756	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
1757	AssertPtrReturn(pStreamCA, VERR_INVALID_POINTER);
1758	LogFunc(("%p: %s fImmediate=%RTbool\n", pStreamCA, pStreamCA->Cfg.szName, fImmediate));
1759	#ifdef LOG_ENABLED
1760	uint64_t const nsStart = RTTimeNanoTS();
1761	#endif
1762
1763	/*
1764	* Never mind if the status isn't INIT (it should always be, though).
1765	*/
1766	COREAUDIOINITSTATE const enmInitState = (COREAUDIOINITSTATE)ASMAtomicReadU32(&pStreamCA->enmInitState);
1767	AssertMsg(enmInitState == COREAUDIOINITSTATE_INIT, ("%d\n", enmInitState));
1768	if (enmInitState == COREAUDIOINITSTATE_INIT)
1769	{
1770	Assert(RTCritSectIsInitialized(&pStreamCA->CritSect));
1771
1772	/*
1773	* Change the stream state and stop the stream (just to be sure).
1774	*/
1775	OSStatus orc;
1776	ASMAtomicWriteU32(&pStreamCA->enmInitState, COREAUDIOINITSTATE_IN_UNINIT);
1777	if (pStreamCA->hAudioQueue)
1778	{
1779	orc = AudioQueueStop(pStreamCA->hAudioQueue, fImmediate ? TRUE : FALSE /inImmediate/synchronously/);
1780	LogFlowFunc(("AudioQueueStop -> %#x\n", orc));
1781	}
1782
1783	/*
1784	* Enter and leave the critsect afterwards for paranoid reasons.
1785	*/
1786	RTCritSectEnter(&pStreamCA->CritSect);
1787	RTCritSectLeave(&pStreamCA->CritSect);
1788
1789	/*
1790	* Free the queue buffers and the queue.
1791	*
1792	* This may take a while. The AudioQueueReset call seems to helps
1793	* reducing time stuck in AudioQueueDispose.
1794	*/
1795	#ifdef CORE_AUDIO_WITH_BREAKPOINT_TIMER
1796	LogRel(("Queue-destruction timer starting...\n"));
1797	PDRVHOSTCOREAUDIO pThis = RT_FROM_MEMBER(pInterface, DRVHOSTCOREAUDIO, IHostAudio);
1798	RTTimerLRStart(pThis->hBreakpointTimer, RT_NS_100MS);
1799	uint64_t nsStart = RTTimeNanoTS();
1800	#endif
1801
1802	#if 0 /* This seems to work even when doing a non-immediate stop&dispose. However, it doesn't make sense conceptually. */
1803	if (pStreamCA->hAudioQueue /&& fImmediate/)
1804	{
1805	LogFlowFunc(("Calling AudioQueueReset ...\n"));
1806	orc = AudioQueueReset(pStreamCA->hAudioQueue);
1807	LogFlowFunc(("AudioQueueReset -> %#x\n", orc));
1808	}
1809	#endif
1810
1811	if (pStreamCA->paBuffers && fImmediate)
1812	{
1813	LogFlowFunc(("Freeing %u buffers ...\n", pStreamCA->cBuffers));
1814	for (uint32_t iBuf = 0; iBuf < pStreamCA->cBuffers; iBuf++)
1815	{
1816	orc = AudioQueueFreeBuffer(pStreamCA->hAudioQueue, pStreamCA->paBuffers[iBuf].pBuf);
1817	AssertMsg(orc == noErr, ("AudioQueueFreeBuffer(#%u) -> orc=%#x\n", iBuf, orc));
1818	pStreamCA->paBuffers[iBuf].pBuf = NULL;
1819	}
1820	}
1821
1822	if (pStreamCA->hAudioQueue)
1823	{
1824	LogFlowFunc(("Disposing of the queue ...\n"));
1825	orc = AudioQueueDispose(pStreamCA->hAudioQueue, fImmediate ? TRUE : FALSE /inImmediate/synchronously/); /* may take some time */
1826	LogFlowFunc(("AudioQueueDispose -> %#x (%d)\n", orc, orc));
1827	AssertMsg(orc == noErr, ("AudioQueueDispose -> orc=%#x\n", orc));
1828	pStreamCA->hAudioQueue = NULL;
1829	}
1830
1831	/* We should get no further buffer callbacks at this point according to the docs. */
1832	if (pStreamCA->paBuffers)
1833	{
1834	RTMemFree(pStreamCA->paBuffers);
1835	pStreamCA->paBuffers = NULL;
1836	}
1837	pStreamCA->cBuffers = 0;
1838
1839	#ifdef CORE_AUDIO_WITH_BREAKPOINT_TIMER
1840	RTTimerLRStop(pThis->hBreakpointTimer);
1841	LogRel(("Queue-destruction: %'RU64\n", RTTimeNanoTS() - nsStart));
1842	#endif
1843
1844	/*
1845	* Delete the critsect and we're done.
1846	*/
1847	RTCritSectDelete(&pStreamCA->CritSect);
1848
1849	ASMAtomicWriteU32(&pStreamCA->enmInitState, COREAUDIOINITSTATE_UNINIT);
1850	}
1851	else
1852	LogFunc(("Wrong stream init state for %p: %d - leaking it\n", pStream, enmInitState));
1853
1854	LogFunc(("returns (took %'RU64 ns)\n", RTTimeNanoTS() - nsStart));
1855	return VINF_SUCCESS;
1856	}
1857
1858
1859	#ifdef CORE_AUDIO_WITH_BREAKPOINT_TIMER
1860	/** @callback_method_impl{FNRTTIMERLR, For debugging things that takes too long.} */
1861	static DECLCALLBACK(void) drvHstAudCaBreakpointTimer(RTTIMERLR hTimer, void *pvUser, uint64_t iTick)
1862	{
1863	LogFlowFunc(("Queue-destruction timeout! iTick=%RU64\n", iTick));
1864	RT_NOREF(hTimer, pvUser, iTick);
1865	RTLogFlush(NULL);
1866	RT_BREAKPOINT();
1867	}
1868	#endif
1869
1870
1871	/**
1872	* @ interface_method_impl{PDMIHOSTAUDIO,pfnStreamEnable}
1873	*/
1874	static DECLCALLBACK(int) drvHstAudCaHA_StreamEnable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
1875	{
1876	RT_NOREF(pInterface);
1877	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
1878	LogFlowFunc(("Stream '%s' {%s}\n", pStreamCA->Cfg.szName, drvHstAudCaStreamStatusString(pStreamCA)));
1879	AssertReturn(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, VERR_AUDIO_STREAM_NOT_READY);
1880	RTCritSectEnter(&pStreamCA->CritSect);
1881
1882	Assert(!pStreamCA->fEnabled);
1883	Assert(!pStreamCA->fStarted);
1884
1885	/*
1886	* We always reset the buffer before enabling the stream (normally never necessary).
1887	*/
1888	OSStatus orc = AudioQueueReset(pStreamCA->hAudioQueue);
1889	if (orc != noErr)
1890	LogRelMax(64, ("CoreAudio: Stream reset failed when enabling '%s': %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
1891	Assert(orc == noErr);
1892	for (uint32_t iBuf = 0; iBuf < pStreamCA->cBuffers; iBuf++)
1893	Assert(!drvHstAudCaIsBufferQueued(pStreamCA->paBuffers[iBuf].pBuf));
1894
1895	pStreamCA->offInternal = 0;
1896	pStreamCA->fDraining = false;
1897	pStreamCA->fEnabled = true;
1898	pStreamCA->fRestartOnResume = false;
1899	pStreamCA->idxBuffer = 0;
1900
1901	/*
1902	* Input streams will start capturing, while output streams will only start
1903	* playing once we get some audio data to play (see drvHstAudCaHA_StreamPlay).
1904	*/
1905	int rc = VINF_SUCCESS;
1906	if (pStreamCA->Cfg.enmDir == PDMAUDIODIR_IN)
1907	{
1908	/* Zero (probably not needed) and submit all the buffers first. */
1909	for (uint32_t iBuf = 0; iBuf < pStreamCA->cBuffers; iBuf++)
1910	{
1911	AudioQueueBufferRef pBuf = pStreamCA->paBuffers[iBuf].pBuf;
1912
1913	RT_BZERO(pBuf->mAudioData, pBuf->mAudioDataBytesCapacity);
1914	pBuf->mAudioDataByteSize = 0;
1915	drvHstAudCaSetBufferQueued(pBuf, true /fQueued/);
1916
1917	orc = AudioQueueEnqueueBuffer(pStreamCA->hAudioQueue, pBuf, 0 /inNumPacketDescs/, NULL /inPacketDescs/);
1918	AssertLogRelMsgBreakStmt(orc == noErr, ("CoreAudio: AudioQueueEnqueueBuffer(#%u) -> %#x (%d) - stream '%s'\n",
1919	iBuf, orc, orc, pStreamCA->Cfg.szName),
1920	drvHstAudCaSetBufferQueued(pBuf, false /fQueued/));
1921	}
1922
1923	/* Start the stream. */
1924	if (orc == noErr)
1925	{
1926	LogFlowFunc(("Start input stream '%s'...\n", pStreamCA->Cfg.szName));
1927	orc = AudioQueueStart(pStreamCA->hAudioQueue, NULL /inStartTime/);
1928	AssertLogRelMsgStmt(orc == noErr, ("CoreAudio: AudioQueueStart(%s) -> %#x (%d) \n", pStreamCA->Cfg.szName, orc, orc),
1929	rc = VERR_AUDIO_STREAM_NOT_READY);
1930	pStreamCA->fStarted = orc == noErr;
1931	}
1932	else
1933	rc = VERR_AUDIO_STREAM_NOT_READY;
1934	}
1935	else
1936	Assert(pStreamCA->Cfg.enmDir == PDMAUDIODIR_OUT);
1937
1938	RTCritSectLeave(&pStreamCA->CritSect);
1939	LogFlowFunc(("returns %Rrc\n", rc));
1940	return rc;
1941	}
1942
1943
1944	/**
1945	* @ interface_method_impl{PDMIHOSTAUDIO,pfnStreamDisable}
1946	*/
1947	static DECLCALLBACK(int) drvHstAudCaHA_StreamDisable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
1948	{
1949	RT_NOREF(pInterface);
1950	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
1951	LogFlowFunc(("cMsLastTransfer=%RI64 ms, stream '%s' {%s} \n",
1952	pStreamCA->msLastTransfer ? RTTimeMilliTS() - pStreamCA->msLastTransfer : -1,
1953	pStreamCA->Cfg.szName, drvHstAudCaStreamStatusString(pStreamCA) ));
1954	AssertReturn(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, VERR_AUDIO_STREAM_NOT_READY);
1955	RTCritSectEnter(&pStreamCA->CritSect);
1956
1957	/*
1958	* Always stop it (draining or no).
1959	*/
1960	pStreamCA->fEnabled = false;
1961	pStreamCA->fRestartOnResume = false;
1962	Assert(!pStreamCA->fDraining \|\| pStreamCA->Cfg.enmDir == PDMAUDIODIR_OUT);
1963
1964	int rc = VINF_SUCCESS;
1965	if (pStreamCA->fStarted)
1966	{
1967	#if 0
1968	OSStatus orc2 = AudioQueueReset(pStreamCA->hAudioQueue);
1969	LogFlowFunc(("AudioQueueReset(%s) returns %#x (%d)\n", pStreamCA->Cfg.szName, orc2, orc2)); RT_NOREF(orc2);
1970	orc2 = AudioQueueFlush(pStreamCA->hAudioQueue);
1971	LogFlowFunc(("AudioQueueFlush(%s) returns %#x (%d)\n", pStreamCA->Cfg.szName, orc2, orc2)); RT_NOREF(orc2);
1972	#endif
1973
1974	OSStatus orc = AudioQueueStop(pStreamCA->hAudioQueue, TRUE /inImmediate/);
1975	LogFlowFunc(("AudioQueueStop(%s,TRUE) returns %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
1976	if (orc != noErr)
1977	{
1978	LogRelMax(64, ("CoreAudio: Stopping '%s' failed (disable): %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
1979	rc = VERR_GENERAL_FAILURE;
1980	}
1981	pStreamCA->fStarted = false;
1982	pStreamCA->fDraining = false;
1983	}
1984
1985	RTCritSectLeave(&pStreamCA->CritSect);
1986	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHstAudCaStreamStatusString(pStreamCA)));
1987	return rc;
1988	}
1989
1990
1991	/**
1992	* @ interface_method_impl{PDMIHOSTAUDIO,pfnStreamPause}
1993	*/
1994	static DECLCALLBACK(int) drvHstAudCaHA_StreamPause(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
1995	{
1996	RT_NOREF(pInterface);
1997	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
1998	LogFlowFunc(("cMsLastTransfer=%RI64 ms, stream '%s' {%s} \n",
1999	pStreamCA->msLastTransfer ? RTTimeMilliTS() - pStreamCA->msLastTransfer : -1,
2000	pStreamCA->Cfg.szName, drvHstAudCaStreamStatusString(pStreamCA) ));
2001	AssertReturn(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, VERR_AUDIO_STREAM_NOT_READY);
2002	RTCritSectEnter(&pStreamCA->CritSect);
2003
2004	/*
2005	* Unless we're draining the stream, pause it if it has started.
2006	*/
2007	int rc = VINF_SUCCESS;
2008	if (pStreamCA->fStarted && !pStreamCA->fDraining)
2009	{
2010	pStreamCA->fRestartOnResume = true;
2011
2012	OSStatus orc = AudioQueuePause(pStreamCA->hAudioQueue);
2013	LogFlowFunc(("AudioQueuePause(%s) returns %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
2014	if (orc != noErr)
2015	{
2016	LogRelMax(64, ("CoreAudio: Pausing '%s' failed: %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
2017	rc = VERR_GENERAL_FAILURE;
2018	}
2019	pStreamCA->fStarted = false;
2020	}
2021	else
2022	{
2023	pStreamCA->fRestartOnResume = false;
2024	if (pStreamCA->fDraining)
2025	{
2026	LogFunc(("Stream '%s' is draining\n", pStreamCA->Cfg.szName));
2027	Assert(pStreamCA->fStarted);
2028	}
2029	}
2030
2031	RTCritSectLeave(&pStreamCA->CritSect);
2032	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHstAudCaStreamStatusString(pStreamCA)));
2033	return rc;
2034	}
2035
2036
2037	/**
2038	* @ interface_method_impl{PDMIHOSTAUDIO,pfnStreamResume}
2039	*/
2040	static DECLCALLBACK(int) drvHstAudCaHA_StreamResume(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2041	{
2042	RT_NOREF(pInterface);
2043	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
2044	LogFlowFunc(("Stream '%s' {%s}\n", pStreamCA->Cfg.szName, drvHstAudCaStreamStatusString(pStreamCA)));
2045	AssertReturn(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, VERR_AUDIO_STREAM_NOT_READY);
2046	RTCritSectEnter(&pStreamCA->CritSect);
2047
2048	/*
2049	* Resume according to state saved by drvHstAudCaHA_StreamPause.
2050	*/
2051	int rc = VINF_SUCCESS;
2052	if (pStreamCA->fRestartOnResume)
2053	{
2054	OSStatus orc = AudioQueueStart(pStreamCA->hAudioQueue, NULL /inStartTime/);
2055	LogFlowFunc(("AudioQueueStart(%s, NULL) returns %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
2056	if (orc != noErr)
2057	{
2058	LogRelMax(64, ("CoreAudio: Pausing '%s' failed: %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
2059	rc = VERR_AUDIO_STREAM_NOT_READY;
2060	}
2061	}
2062	pStreamCA->fRestartOnResume = false;
2063
2064	RTCritSectLeave(&pStreamCA->CritSect);
2065	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHstAudCaStreamStatusString(pStreamCA)));
2066	return rc;
2067	}
2068
2069
2070	/**
2071	* @ interface_method_impl{PDMIHOSTAUDIO,pfnStreamDrain}
2072	*/
2073	static DECLCALLBACK(int) drvHstAudCaHA_StreamDrain(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2074	{
2075	RT_NOREF(pInterface);
2076	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
2077	AssertReturn(pStreamCA->Cfg.enmDir == PDMAUDIODIR_OUT, VERR_INVALID_PARAMETER);
2078	LogFlowFunc(("cMsLastTransfer=%RI64 ms, stream '%s' {%s} \n",
2079	pStreamCA->msLastTransfer ? RTTimeMilliTS() - pStreamCA->msLastTransfer : -1,
2080	pStreamCA->Cfg.szName, drvHstAudCaStreamStatusString(pStreamCA) ));
2081	AssertReturn(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, VERR_AUDIO_STREAM_NOT_READY);
2082	RTCritSectEnter(&pStreamCA->CritSect);
2083
2084	/*
2085	* The AudioQueueStop function has both an immediate and a drain mode,
2086	* so we'll obviously use the latter here. For checking draining progress,
2087	* we will just check if all buffers have been returned or not.
2088	*/
2089	int rc = VINF_SUCCESS;
2090	if (pStreamCA->fStarted)
2091	{
2092	if (!pStreamCA->fDraining)
2093	{
2094	OSStatus orc = AudioQueueStop(pStreamCA->hAudioQueue, FALSE /inImmediate/);
2095	LogFlowFunc(("AudioQueueStop(%s, FALSE) returns %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
2096	if (orc == noErr)
2097	pStreamCA->fDraining = true;
2098	else
2099	{
2100	LogRelMax(64, ("CoreAudio: Stopping '%s' failed (drain): %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
2101	rc = VERR_GENERAL_FAILURE;
2102	}
2103	}
2104	else
2105	LogFlowFunc(("Already draining '%s' ...\n", pStreamCA->Cfg.szName));
2106	}
2107	else
2108	{
2109	LogFlowFunc(("Drain requested for '%s', but not started playback...\n", pStreamCA->Cfg.szName));
2110	AssertStmt(!pStreamCA->fDraining, pStreamCA->fDraining = false);
2111	}
2112
2113	RTCritSectLeave(&pStreamCA->CritSect);
2114	LogFlowFunc(("returns %Rrc {%s}\n", rc, drvHstAudCaStreamStatusString(pStreamCA)));
2115	return rc;
2116	}
2117
2118
2119	/**
2120	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetReadable}
2121	*/
2122	static DECLCALLBACK(uint32_t) drvHstAudCaHA_StreamGetReadable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2123	{
2124	RT_NOREF(pInterface);
2125	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
2126	AssertPtrReturn(pStreamCA, VERR_INVALID_POINTER);
2127	AssertReturn(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, 0);
2128
2129	uint32_t cbReadable = 0;
2130	if (pStreamCA->Cfg.enmDir == PDMAUDIODIR_IN)
2131	{
2132	RTCritSectEnter(&pStreamCA->CritSect);
2133	PCOREAUDIOBUF const paBuffers = pStreamCA->paBuffers;
2134	uint32_t const cBuffers = pStreamCA->cBuffers;
2135	uint32_t const idxStart = pStreamCA->idxBuffer;
2136	uint32_t idxBuffer = idxStart;
2137	AudioQueueBufferRef pBuf;
2138
2139	if ( cBuffers > 0
2140	&& !drvHstAudCaIsBufferQueued(pBuf = paBuffers[idxBuffer].pBuf))
2141	{
2142	do
2143	{
2144	uint32_t const cbTotal = pBuf->mAudioDataBytesCapacity;
2145	uint32_t cbFill = pBuf->mAudioDataByteSize;
2146	AssertStmt(cbFill <= cbTotal, cbFill = cbTotal);
2147	uint32_t off = paBuffers[idxBuffer].offRead;
2148	AssertStmt(off < cbFill, off = cbFill);
2149
2150	cbReadable += cbFill - off;
2151
2152	/* Advance. */
2153	idxBuffer++;
2154	if (idxBuffer < cBuffers)
2155	{ /* likely */ }
2156	else
2157	idxBuffer = 0;
2158	} while (idxBuffer != idxStart && !drvHstAudCaIsBufferQueued(pBuf = paBuffers[idxBuffer].pBuf));
2159	}
2160
2161	RTCritSectLeave(&pStreamCA->CritSect);
2162	}
2163	Log2Func(("returns %#x for '%s'\n", cbReadable, pStreamCA->Cfg.szName));
2164	return cbReadable;
2165	}
2166
2167
2168	/**
2169	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetWritable}
2170	*/
2171	static DECLCALLBACK(uint32_t) drvHstAudCaHA_StreamGetWritable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
2172	{
2173	RT_NOREF(pInterface);
2174	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
2175	AssertPtrReturn(pStreamCA, VERR_INVALID_POINTER);
2176	AssertReturn(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, 0);
2177
2178	uint32_t cbWritable = 0;
2179	if (pStreamCA->Cfg.enmDir == PDMAUDIODIR_OUT)
2180	{
2181	RTCritSectEnter(&pStreamCA->CritSect);
2182	PCOREAUDIOBUF const paBuffers = pStreamCA->paBuffers;
2183	uint32_t const cBuffers = pStreamCA->cBuffers;
2184	uint32_t const idxStart = pStreamCA->idxBuffer;
2185	uint32_t idxBuffer = idxStart;
2186	AudioQueueBufferRef pBuf;
2187
2188	if ( cBuffers > 0
2189	&& !drvHstAudCaIsBufferQueued(pBuf = paBuffers[idxBuffer].pBuf))
2190	{
2191	do
2192	{
2193	uint32_t const cbTotal = pBuf->mAudioDataBytesCapacity;
2194	uint32_t cbUsed = pBuf->mAudioDataByteSize;
2195	AssertStmt(cbUsed <= cbTotal, paBuffers[idxBuffer].pBuf->mAudioDataByteSize = cbUsed = cbTotal);
2196
2197	cbWritable += cbTotal - cbUsed;
2198
2199	/* Advance. */
2200	idxBuffer++;
2201	if (idxBuffer < cBuffers)
2202	{ /* likely */ }
2203	else
2204	idxBuffer = 0;
2205	} while (idxBuffer != idxStart && !drvHstAudCaIsBufferQueued(pBuf = paBuffers[idxBuffer].pBuf));
2206	}
2207
2208	RTCritSectLeave(&pStreamCA->CritSect);
2209	}
2210	Log2Func(("returns %#x for '%s'\n", cbWritable, pStreamCA->Cfg.szName));
2211	return cbWritable;
2212	}
2213
2214
2215	/**
2216	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetState}
2217	*/
2218	static DECLCALLBACK(PDMHOSTAUDIOSTREAMSTATE) drvHstAudCaHA_StreamGetState(PPDMIHOSTAUDIO pInterface,
2219	PPDMAUDIOBACKENDSTREAM pStream)
2220	{
2221	RT_NOREF(pInterface);
2222	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
2223	AssertPtrReturn(pStreamCA, PDMHOSTAUDIOSTREAMSTATE_INVALID);
2224
2225	if (ASMAtomicReadU32(&pStreamCA->enmInitState) == COREAUDIOINITSTATE_INIT)
2226	{
2227	if (!pStreamCA->fDraining)
2228	{ /* likely */ }
2229	else
2230	{
2231	/*
2232	* If we're draining, we're done when we've got all the buffers back.
2233	*/
2234	RTCritSectEnter(&pStreamCA->CritSect);
2235	PCOREAUDIOBUF const paBuffers = pStreamCA->paBuffers;
2236	uintptr_t idxBuffer = pStreamCA->cBuffers;
2237	while (idxBuffer-- > 0)
2238	if (!drvHstAudCaIsBufferQueued(paBuffers[idxBuffer].pBuf))
2239	{ /* likely */ }
2240	else
2241	{
2242	#ifdef LOG_ENABLED
2243	uint32_t cQueued = 1;
2244	while (idxBuffer-- > 0)
2245	cQueued += drvHstAudCaIsBufferQueued(paBuffers[idxBuffer].pBuf);
2246	LogFunc(("Still done draining '%s': %u queued buffers\n", pStreamCA->Cfg.szName, cQueued));
2247	#endif
2248	RTCritSectLeave(&pStreamCA->CritSect);
2249	return PDMHOSTAUDIOSTREAMSTATE_DRAINING;
2250	}
2251
2252	LogFunc(("Done draining '%s'\n", pStreamCA->Cfg.szName));
2253	pStreamCA->fDraining = false;
2254	pStreamCA->fEnabled = false;
2255	pStreamCA->fStarted = false;
2256	RTCritSectLeave(&pStreamCA->CritSect);
2257	}
2258
2259	return PDMHOSTAUDIOSTREAMSTATE_OKAY;
2260	}
2261	return PDMHOSTAUDIOSTREAMSTATE_NOT_WORKING; /** @todo ?? */
2262	}
2263
2264	/**
2265	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPlay}
2266	*/
2267	static DECLCALLBACK(int) drvHstAudCaHA_StreamPlay(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
2268	const void pvBuf, uint32_t cbBuf, uint32_t pcbWritten)
2269	{
2270	RT_NOREF(pInterface);
2271	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
2272	AssertPtrReturn(pStreamCA, VERR_INVALID_POINTER);
2273	AssertPtrReturn(pcbWritten, VERR_INVALID_POINTER);
2274	if (cbBuf)
2275	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
2276	Assert(PDMAudioPropsIsSizeAligned(&pStreamCA->Cfg.Props, cbBuf));
2277	AssertReturnStmt(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, *pcbWritten = 0, VERR_AUDIO_STREAM_NOT_READY);
2278
2279	RTCritSectEnter(&pStreamCA->CritSect);
2280	if (pStreamCA->fEnabled)
2281	{ /* likely */ }
2282	else
2283	{
2284	RTCritSectLeave(&pStreamCA->CritSect);
2285	*pcbWritten = 0;
2286	LogFunc(("Skipping %#x byte write to disabled stream {%s}\n", cbBuf, drvHstAudCaStreamStatusString(pStreamCA) ));
2287	return VINF_SUCCESS;
2288	}
2289	Log4Func(("cbBuf=%#x stream '%s' {%s}\n", cbBuf, pStreamCA->Cfg.szName, drvHstAudCaStreamStatusString(pStreamCA) ));
2290
2291	/*
2292	* Transfer loop.
2293	*/
2294	PCOREAUDIOBUF const paBuffers = pStreamCA->paBuffers;
2295	uint32_t const cBuffers = pStreamCA->cBuffers;
2296	AssertMsgReturnStmt(cBuffers >= COREAUDIO_MIN_BUFFERS && cBuffers < COREAUDIO_MAX_BUFFERS, ("%u\n", cBuffers),
2297	RTCritSectLeave(&pStreamCA->CritSect), VERR_AUDIO_STREAM_NOT_READY);
2298
2299	uint32_t idxBuffer = pStreamCA->idxBuffer;
2300	AssertStmt(idxBuffer < cBuffers, idxBuffer %= cBuffers);
2301
2302	int rc = VINF_SUCCESS;
2303	uint32_t cbWritten = 0;
2304	while (cbBuf > 0)
2305	{
2306	AssertBreakStmt(pStreamCA->hAudioQueue, rc = VERR_AUDIO_STREAM_NOT_READY);
2307
2308	/*
2309	* Check out how much we can put into the current buffer.
2310	*/
2311	AudioQueueBufferRef const pBuf = paBuffers[idxBuffer].pBuf;
2312	if (!drvHstAudCaIsBufferQueued(pBuf))
2313	{ /* likely */ }
2314	else
2315	{
2316	LogFunc(("@%#RX64: Warning! Out of buffer space! (%#x bytes unwritten)\n", pStreamCA->offInternal, cbBuf));
2317	/** @todo stats */
2318	break;
2319	}
2320
2321	AssertPtrBreakStmt(pBuf, rc = VERR_INTERNAL_ERROR_2);
2322	uint32_t const cbTotal = pBuf->mAudioDataBytesCapacity;
2323	uint32_t cbUsed = pBuf->mAudioDataByteSize;
2324	AssertStmt(cbUsed < cbTotal, cbUsed = cbTotal);
2325	uint32_t const cbAvail = cbTotal - cbUsed;
2326
2327	/*
2328	* Copy over the data.
2329	*/
2330	if (cbBuf < cbAvail)
2331	{
2332	Log3Func(("@%#RX64: buffer #%u/%u: %#x bytes, have %#x only - leaving unqueued {%s}\n",
2333	pStreamCA->offInternal, idxBuffer, cBuffers, cbAvail, cbBuf, drvHstAudCaStreamStatusString(pStreamCA) ));
2334	memcpy((uint8_t *)pBuf->mAudioData + cbUsed, pvBuf, cbBuf);
2335	pBuf->mAudioDataByteSize = cbUsed + cbBuf;
2336	cbWritten += cbBuf;
2337	pStreamCA->offInternal += cbBuf;
2338	/** @todo Maybe queue it anyway if it's almost full or we haven't got a lot of
2339	* buffers queued. */
2340	break;
2341	}
2342
2343	Log3Func(("@%#RX64: buffer #%u/%u: %#x bytes, have %#x - will queue {%s}\n",
2344	pStreamCA->offInternal, idxBuffer, cBuffers, cbAvail, cbBuf, drvHstAudCaStreamStatusString(pStreamCA) ));
2345	memcpy((uint8_t *)pBuf->mAudioData + cbUsed, pvBuf, cbAvail);
2346	pBuf->mAudioDataByteSize = cbTotal;
2347	cbWritten += cbAvail;
2348	pStreamCA->offInternal += cbAvail;
2349	drvHstAudCaSetBufferQueued(pBuf, true /fQueued/);
2350
2351	OSStatus orc = AudioQueueEnqueueBuffer(pStreamCA->hAudioQueue, pBuf, 0 /inNumPacketDesc/, NULL /inPacketDescs/);
2352	if (orc == noErr)
2353	{ /* likely */ }
2354	else
2355	{
2356	LogRelMax(256, ("CoreAudio: AudioQueueEnqueueBuffer('%s', #%u) failed: %#x (%d)\n",
2357	pStreamCA->Cfg.szName, idxBuffer, orc, orc));
2358	drvHstAudCaSetBufferQueued(pBuf, false /fQueued/);
2359	pBuf->mAudioDataByteSize -= PDMAudioPropsFramesToBytes(&pStreamCA->Cfg.Props, 1); /* avoid assertions above */
2360	rc = VERR_AUDIO_STREAM_NOT_READY;
2361	break;
2362	}
2363
2364	/*
2365	* Advance.
2366	*/
2367	idxBuffer += 1;
2368	if (idxBuffer < cBuffers)
2369	{ /* likely */ }
2370	else
2371	idxBuffer = 0;
2372	pStreamCA->idxBuffer = idxBuffer;
2373
2374	pvBuf = (const uint8_t *)pvBuf + cbAvail;
2375	cbBuf -= cbAvail;
2376	}
2377
2378	/*
2379	* Start the stream if we haven't do so yet.
2380	*/
2381	if ( pStreamCA->fStarted
2382	\|\| cbWritten == 0
2383	\|\| RT_FAILURE_NP(rc))
2384	{ /* likely */ }
2385	else
2386	{
2387	UInt32 cFramesPrepared = 0;
2388	#if 0 /* taking too long? */
2389	OSStatus orc = AudioQueuePrime(pStreamCA->hAudioQueue, 0 /inNumberOfFramesToPrepare/, &cFramesPrepared);
2390	LogFlowFunc(("AudioQueuePrime(%s, 0,) returns %#x (%d) and cFramesPrepared=%u (offInternal=%#RX64)\n",
2391	pStreamCA->Cfg.szName, orc, orc, cFramesPrepared, pStreamCA->offInternal));
2392	AssertMsg(orc == noErr, ("%#x (%d)\n", orc, orc));
2393	#else
2394	OSStatus orc;
2395	#endif
2396	orc = AudioQueueStart(pStreamCA->hAudioQueue, NULL /inStartTime/);
2397	LogFunc(("AudioQueueStart(%s, NULL) returns %#x (%d)\n", pStreamCA->Cfg.szName, orc, orc));
2398	if (orc == noErr)
2399	pStreamCA->fStarted = true;
2400	else
2401	{
2402	LogRelMax(128, ("CoreAudio: Starting '%s' failed: %#x (%d) - %u frames primed, %#x bytes queued\n",
2403	pStreamCA->Cfg.szName, orc, orc, cFramesPrepared, pStreamCA->offInternal));
2404	rc = VERR_AUDIO_STREAM_NOT_READY;
2405	}
2406	}
2407
2408	/*
2409	* Done.
2410	*/
2411	#ifdef LOG_ENABLED
2412	uint64_t const msPrev = pStreamCA->msLastTransfer;
2413	#endif
2414	uint64_t const msNow = RTTimeMilliTS();
2415	if (cbWritten)
2416	pStreamCA->msLastTransfer = msNow;
2417
2418	RTCritSectLeave(&pStreamCA->CritSect);
2419
2420	*pcbWritten = cbWritten;
2421	if (RT_SUCCESS(rc) \|\| !cbWritten)
2422	{ }
2423	else
2424	{
2425	LogFlowFunc(("Suppressing %Rrc to report %#x bytes written\n", rc, cbWritten));
2426	rc = VINF_SUCCESS;
2427	}
2428	LogFlowFunc(("@%#RX64: rc=%Rrc cbWritten=%RU32 cMsDelta=%RU64 (%RU64 -> %RU64) {%s}\n", pStreamCA->offInternal, rc, cbWritten,
2429	msPrev ? msNow - msPrev : 0, msPrev, pStreamCA->msLastTransfer, drvHstAudCaStreamStatusString(pStreamCA) ));
2430	return rc;
2431	}
2432
2433
2434	/**
2435	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCapture}
2436	*/
2437	static DECLCALLBACK(int) drvHstAudCaHA_StreamCapture(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
2438	void pvBuf, uint32_t cbBuf, uint32_t pcbRead)
2439	{
2440	RT_NOREF(pInterface);
2441	PCOREAUDIOSTREAM pStreamCA = (PCOREAUDIOSTREAM)pStream;
2442	AssertPtrReturn(pStreamCA, 0);
2443	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
2444	AssertReturn(cbBuf, VERR_INVALID_PARAMETER);
2445	AssertPtrReturn(pcbRead, VERR_INVALID_POINTER);
2446	Assert(PDMAudioPropsIsSizeAligned(&pStreamCA->Cfg.Props, cbBuf));
2447	AssertReturnStmt(pStreamCA->enmInitState == COREAUDIOINITSTATE_INIT, *pcbRead = 0, VERR_AUDIO_STREAM_NOT_READY);
2448
2449	RTCritSectEnter(&pStreamCA->CritSect);
2450	if (pStreamCA->fEnabled)
2451	{ /* likely */ }
2452	else
2453	{
2454	RTCritSectLeave(&pStreamCA->CritSect);
2455	*pcbRead = 0;
2456	LogFunc(("Skipping %#x byte read from disabled stream {%s}\n", cbBuf, drvHstAudCaStreamStatusString(pStreamCA)));
2457	return VINF_SUCCESS;
2458	}
2459	Log4Func(("cbBuf=%#x stream '%s' {%s}\n", cbBuf, pStreamCA->Cfg.szName, drvHstAudCaStreamStatusString(pStreamCA) ));
2460
2461
2462	/*
2463	* Transfer loop.
2464	*/
2465	uint32_t const cbFrame = PDMAudioPropsFrameSize(&pStreamCA->Cfg.Props);
2466	PCOREAUDIOBUF const paBuffers = pStreamCA->paBuffers;
2467	uint32_t const cBuffers = pStreamCA->cBuffers;
2468	AssertMsgReturnStmt(cBuffers >= COREAUDIO_MIN_BUFFERS && cBuffers < COREAUDIO_MAX_BUFFERS, ("%u\n", cBuffers),
2469	RTCritSectLeave(&pStreamCA->CritSect), VERR_AUDIO_STREAM_NOT_READY);
2470
2471	uint32_t idxBuffer = pStreamCA->idxBuffer;
2472	AssertStmt(idxBuffer < cBuffers, idxBuffer %= cBuffers);
2473
2474	int rc = VINF_SUCCESS;
2475	uint32_t cbRead = 0;
2476	while (cbBuf > cbFrame)
2477	{
2478	AssertBreakStmt(pStreamCA->hAudioQueue, rc = VERR_AUDIO_STREAM_NOT_READY);
2479
2480	/*
2481	* Check out how much we can read from the current buffer (if anything at all).
2482	*/
2483	AudioQueueBufferRef const pBuf = paBuffers[idxBuffer].pBuf;
2484	if (!drvHstAudCaIsBufferQueued(pBuf))
2485	{ /* likely */ }
2486	else
2487	{
2488	LogFunc(("@%#RX64: Warning! Underrun! (%#x bytes unread)\n", pStreamCA->offInternal, cbBuf));
2489	/** @todo stats */
2490	break;
2491	}
2492
2493	AssertPtrBreakStmt(pBuf, rc = VERR_INTERNAL_ERROR_2);
2494	uint32_t const cbTotal = pBuf->mAudioDataBytesCapacity;
2495	uint32_t cbValid = pBuf->mAudioDataByteSize;
2496	AssertStmt(cbValid < cbTotal, cbValid = cbTotal);
2497	uint32_t offRead = paBuffers[idxBuffer].offRead;
2498	uint32_t const cbLeft = cbValid - offRead;
2499
2500	/*
2501	* Copy over the data.
2502	*/
2503	if (cbBuf < cbLeft)
2504	{
2505	Log3Func(("@%#RX64: buffer #%u/%u: %#x bytes, want %#x - leaving unqueued {%s}\n",
2506	pStreamCA->offInternal, idxBuffer, cBuffers, cbLeft, cbBuf, drvHstAudCaStreamStatusString(pStreamCA) ));
2507	memcpy(pvBuf, (uint8_t const *)pBuf->mAudioData + offRead, cbBuf);
2508	paBuffers[idxBuffer].offRead = offRead + cbBuf;
2509	cbRead += cbBuf;
2510	pStreamCA->offInternal += cbBuf;
2511	break;
2512	}
2513
2514	Log3Func(("@%#RX64: buffer #%u/%u: %#x bytes, want all (%#x) - will queue {%s}\n",
2515	pStreamCA->offInternal, idxBuffer, cBuffers, cbLeft, cbBuf, drvHstAudCaStreamStatusString(pStreamCA) ));
2516	memcpy(pvBuf, (uint8_t const *)pBuf->mAudioData + offRead, cbLeft);
2517	cbRead += cbLeft;
2518	pStreamCA->offInternal += cbLeft;
2519
2520	RT_BZERO(pBuf->mAudioData, cbTotal); /* paranoia */
2521	paBuffers[idxBuffer].offRead = 0;
2522	pBuf->mAudioDataByteSize = 0;
2523	drvHstAudCaSetBufferQueued(pBuf, true /fQueued/);
2524
2525	OSStatus orc = AudioQueueEnqueueBuffer(pStreamCA->hAudioQueue, pBuf, 0 /inNumPacketDesc/, NULL /inPacketDescs/);
2526	if (orc == noErr)
2527	{ /* likely */ }
2528	else
2529	{
2530	LogRelMax(256, ("CoreAudio: AudioQueueEnqueueBuffer('%s', #%u) failed: %#x (%d)\n",
2531	pStreamCA->Cfg.szName, idxBuffer, orc, orc));
2532	drvHstAudCaSetBufferQueued(pBuf, false /fQueued/);
2533	rc = VERR_AUDIO_STREAM_NOT_READY;
2534	break;
2535	}
2536
2537	/*
2538	* Advance.
2539	*/
2540	idxBuffer += 1;
2541	if (idxBuffer < cBuffers)
2542	{ /* likely */ }
2543	else
2544	idxBuffer = 0;
2545	pStreamCA->idxBuffer = idxBuffer;
2546
2547	pvBuf = (uint8_t *)pvBuf + cbLeft;
2548	cbBuf -= cbLeft;
2549	}
2550
2551	/*
2552	* Done.
2553	*/
2554	#ifdef LOG_ENABLED
2555	uint64_t const msPrev = pStreamCA->msLastTransfer;
2556	#endif
2557	uint64_t const msNow = RTTimeMilliTS();
2558	if (cbRead)
2559	pStreamCA->msLastTransfer = msNow;
2560
2561	RTCritSectLeave(&pStreamCA->CritSect);
2562
2563	*pcbRead = cbRead;
2564	if (RT_SUCCESS(rc) \|\| !cbRead)
2565	{ }
2566	else
2567	{
2568	LogFlowFunc(("Suppressing %Rrc to report %#x bytes read\n", rc, cbRead));
2569	rc = VINF_SUCCESS;
2570	}
2571	LogFlowFunc(("@%#RX64: rc=%Rrc cbRead=%RU32 cMsDelta=%RU64 (%RU64 -> %RU64) {%s}\n", pStreamCA->offInternal, rc, cbRead,
2572	msPrev ? msNow - msPrev : 0, msPrev, pStreamCA->msLastTransfer, drvHstAudCaStreamStatusString(pStreamCA) ));
2573	return rc;
2574	}
2575
2576
2577	/*********************************************************************************************************************************
2578	* PDMIBASE *
2579	*********************************************************************************************************************************/
2580
2581	/**
2582	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
2583	*/
2584	static DECLCALLBACK(void ) drvHstAudCaQueryInterface(PPDMIBASE pInterface, const char pszIID)
2585	{
2586	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
2587	PDRVHOSTCOREAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTCOREAUDIO);
2588
2589	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
2590	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio);
2591
2592	return NULL;
2593	}
2594
2595
2596	/*********************************************************************************************************************************
2597	* PDMDRVREG *
2598	*********************************************************************************************************************************/
2599
2600	/**
2601	* Worker for the power off and destructor callbacks.
2602	*/
2603	static void drvHstAudCaRemoveDefaultDeviceListners(PDRVHOSTCOREAUDIO pThis)
2604	{
2605	/*
2606	* Unregister system callbacks.
2607	*/
2608	AudioObjectPropertyAddress PropAddr =
2609	{
2610	kAudioHardwarePropertyDefaultInputDevice,
2611	kAudioObjectPropertyScopeGlobal,
2612	kAudioObjectPropertyElementMaster
2613	};
2614
2615	OSStatus orc;
2616	if (pThis->fRegisteredDefaultInputListener)
2617	{
2618	orc = AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &PropAddr,
2619	drvHstAudCaDefaultDeviceChangedCallback, pThis);
2620	if ( orc != noErr
2621	&& orc != kAudioHardwareBadObjectError)
2622	LogRel(("CoreAudio: Failed to remove the default input device changed listener: %d (%#x))\n", orc, orc));
2623	pThis->fRegisteredDefaultInputListener = false;
2624	}
2625
2626	if (pThis->fRegisteredDefaultOutputListener)
2627	{
2628	PropAddr.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
2629	orc = AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &PropAddr,
2630	drvHstAudCaDefaultDeviceChangedCallback, pThis);
2631	if ( orc != noErr
2632	&& orc != kAudioHardwareBadObjectError)
2633	LogRel(("CoreAudio: Failed to remove the default output device changed listener: %d (%#x))\n", orc, orc));
2634	pThis->fRegisteredDefaultOutputListener = false;
2635	}
2636
2637	/*
2638	* Unregister device callbacks.
2639	*/
2640	RTCritSectEnter(&pThis->CritSect);
2641
2642	drvHstAudCaDeviceUnregisterCallbacks(pThis, pThis->InputDevice.idDevice);
2643	pThis->InputDevice.idDevice = kAudioDeviceUnknown;
2644
2645	drvHstAudCaDeviceUnregisterCallbacks(pThis, pThis->OutputDevice.idDevice);
2646	pThis->OutputDevice.idDevice = kAudioDeviceUnknown;
2647
2648	RTCritSectLeave(&pThis->CritSect);
2649
2650	LogFlowFuncEnter();
2651	}
2652
2653
2654	/**
2655	* @interface_method_impl{PDMDRVREG,pfnPowerOff}
2656	*/
2657	static DECLCALLBACK(void) drvHstAudCaPowerOff(PPDMDRVINS pDrvIns)
2658	{
2659	PDRVHOSTCOREAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTCOREAUDIO);
2660	drvHstAudCaRemoveDefaultDeviceListners(pThis);
2661	}
2662
2663
2664	/**
2665	* @callback_method_impl{FNPDMDRVDESTRUCT}
2666	*/
2667	static DECLCALLBACK(void) drvHstAudCaDestruct(PPDMDRVINS pDrvIns)
2668	{
2669	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
2670	PDRVHOSTCOREAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTCOREAUDIO);
2671
2672	if (RTCritSectIsInitialized(&pThis->CritSect))
2673	drvHstAudCaRemoveDefaultDeviceListners(pThis);
2674
2675	#ifdef CORE_AUDIO_WITH_WORKER_THREAD
2676	if (pThis->hThread != NIL_RTTHREAD)
2677	{
2678	for (unsigned iLoop = 0; iLoop < 60; iLoop++)
2679	{
2680	if (pThis->hThreadRunLoop)
2681	CFRunLoopStop(pThis->hThreadRunLoop);
2682	if (iLoop > 10)
2683	RTThreadPoke(pThis->hThread);
2684	int rc = RTThreadWait(pThis->hThread, 500 /ms/, NULL /prcThread/);
2685	if (RT_SUCCESS(rc))
2686	break;
2687	AssertMsgBreak(rc == VERR_TIMEOUT, ("RTThreadWait -> %Rrc\n",rc));
2688	}
2689	pThis->hThread = NIL_RTTHREAD;
2690	}
2691	if (pThis->hThreadPortSrc)
2692	{
2693	CFRelease(pThis->hThreadPortSrc);
2694	pThis->hThreadPortSrc = NULL;
2695	}
2696	if (pThis->hThreadPort)
2697	{
2698	CFMachPortInvalidate(pThis->hThreadPort);
2699	CFRelease(pThis->hThreadPort);
2700	pThis->hThreadPort = NULL;
2701	}
2702	if (pThis->hThreadRunLoop)
2703	{
2704	CFRelease(pThis->hThreadRunLoop);
2705	pThis->hThreadRunLoop = NULL;
2706	}
2707	#endif
2708
2709	#ifdef CORE_AUDIO_WITH_BREAKPOINT_TIMER
2710	if (pThis->hBreakpointTimer != NIL_RTTIMERLR)
2711	{
2712	RTTimerLRDestroy(pThis->hBreakpointTimer);
2713	pThis->hBreakpointTimer = NIL_RTTIMERLR;
2714	}
2715	#endif
2716
2717	if (RTCritSectIsInitialized(&pThis->CritSect))
2718	{
2719	int rc2 = RTCritSectDelete(&pThis->CritSect);
2720	AssertRC(rc2);
2721	}
2722
2723	LogFlowFuncLeave();
2724	}
2725
2726
2727	/**
2728	* @callback_method_impl{FNPDMDRVCONSTRUCT,
2729	* Construct a Core Audio driver instance.}
2730	*/
2731	static DECLCALLBACK(int) drvHstAudCaConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
2732	{
2733	RT_NOREF(pCfg, fFlags);
2734	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
2735	PDRVHOSTCOREAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTCOREAUDIO);
2736	PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3;
2737	LogRel(("Audio: Initializing Core Audio driver\n"));
2738
2739	/*
2740	* Init the static parts.
2741	*/
2742	pThis->pDrvIns = pDrvIns;
2743	#ifdef CORE_AUDIO_WITH_WORKER_THREAD
2744	pThis->hThread = NIL_RTTHREAD;
2745	#endif
2746	#ifdef CORE_AUDIO_WITH_BREAKPOINT_TIMER
2747	pThis->hBreakpointTimer = NIL_RTTIMERLR;
2748	#endif
2749	/* IBase */
2750	pDrvIns->IBase.pfnQueryInterface = drvHstAudCaQueryInterface;
2751	/* IHostAudio */
2752	pThis->IHostAudio.pfnGetConfig = drvHstAudCaHA_GetConfig;
2753	pThis->IHostAudio.pfnGetDevices = drvHstAudCaHA_GetDevices;
2754	pThis->IHostAudio.pfnSetDevice = drvHstAudCaHA_SetDevice;
2755	pThis->IHostAudio.pfnGetStatus = drvHstAudCaHA_GetStatus;
2756	pThis->IHostAudio.pfnDoOnWorkerThread = NULL;
2757	pThis->IHostAudio.pfnStreamConfigHint = NULL;
2758	pThis->IHostAudio.pfnStreamCreate = drvHstAudCaHA_StreamCreate;
2759	pThis->IHostAudio.pfnStreamInitAsync = NULL;
2760	pThis->IHostAudio.pfnStreamDestroy = drvHstAudCaHA_StreamDestroy;
2761	pThis->IHostAudio.pfnStreamNotifyDeviceChanged = NULL;
2762	pThis->IHostAudio.pfnStreamEnable = drvHstAudCaHA_StreamEnable;
2763	pThis->IHostAudio.pfnStreamDisable = drvHstAudCaHA_StreamDisable;
2764	pThis->IHostAudio.pfnStreamPause = drvHstAudCaHA_StreamPause;
2765	pThis->IHostAudio.pfnStreamResume = drvHstAudCaHA_StreamResume;
2766	pThis->IHostAudio.pfnStreamDrain = drvHstAudCaHA_StreamDrain;
2767	pThis->IHostAudio.pfnStreamGetReadable = drvHstAudCaHA_StreamGetReadable;
2768	pThis->IHostAudio.pfnStreamGetWritable = drvHstAudCaHA_StreamGetWritable;
2769	pThis->IHostAudio.pfnStreamGetPending = NULL;
2770	pThis->IHostAudio.pfnStreamGetState = drvHstAudCaHA_StreamGetState;
2771	pThis->IHostAudio.pfnStreamPlay = drvHstAudCaHA_StreamPlay;
2772	pThis->IHostAudio.pfnStreamCapture = drvHstAudCaHA_StreamCapture;
2773
2774	int rc = RTCritSectInit(&pThis->CritSect);
2775	AssertRCReturn(rc, rc);
2776
2777	/*
2778	* Validate and read configuration.
2779	*/
2780	PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "InputDeviceID\|OutputDeviceID", "");
2781
2782	char *pszTmp = NULL;
2783	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "InputDeviceID", &pszTmp);
2784	if (RT_SUCCESS(rc))
2785	{
2786	rc = drvHstAudCaSetDevice(pThis, &pThis->InputDevice, true /fInput/, false /fNotify/, pszTmp);
2787	PDMDrvHlpMMHeapFree(pDrvIns, pszTmp);
2788	}
2789	else if (rc != VERR_CFGM_VALUE_NOT_FOUND && rc != VERR_CFGM_NO_PARENT)
2790	return PDMDRV_SET_ERROR(pDrvIns, rc, "Failed to query 'InputDeviceID'");
2791
2792	rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "OutputDeviceID", &pszTmp);
2793	if (RT_SUCCESS(rc))
2794	{
2795	rc = drvHstAudCaSetDevice(pThis, &pThis->OutputDevice, false /fInput/, false /fNotify/, pszTmp);
2796	PDMDrvHlpMMHeapFree(pDrvIns, pszTmp);
2797	}
2798	else if (rc != VERR_CFGM_VALUE_NOT_FOUND && rc != VERR_CFGM_NO_PARENT)
2799	return PDMDRV_SET_ERROR(pDrvIns, rc, "Failed to query 'OutputDeviceID'");
2800
2801	/*
2802	* Query the notification interface from the driver/device above us.
2803	*/
2804	pThis->pIHostAudioPort = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIHOSTAUDIOPORT);
2805	AssertReturn(pThis->pIHostAudioPort, VERR_PDM_MISSING_INTERFACE_ABOVE);
2806
2807	#ifdef CORE_AUDIO_WITH_WORKER_THREAD
2808	/*
2809	* Create worker thread for running callbacks on.
2810	*/
2811	CFMachPortContext PortCtx;
2812	PortCtx.version = 0;
2813	PortCtx.info = pThis;
2814	PortCtx.retain = NULL;
2815	PortCtx.release = NULL;
2816	PortCtx.copyDescription = NULL;
2817	pThis->hThreadPort = CFMachPortCreate(NULL /allocator/, drvHstAudCaThreadPortCallback, &PortCtx, NULL);
2818	AssertLogRelReturn(pThis->hThreadPort != NULL, VERR_NO_MEMORY);
2819
2820	pThis->hThreadPortSrc = CFMachPortCreateRunLoopSource(NULL, pThis->hThreadPort, 0 /order/);
2821	AssertLogRelReturn(pThis->hThreadPortSrc != NULL, VERR_NO_MEMORY);
2822
2823	rc = RTThreadCreateF(&pThis->hThread, drvHstAudCaThread, pThis, 0, RTTHREADTYPE_IO,
2824	RTTHREADFLAGS_WAITABLE, "CaAud-%u", pDrvIns->iInstance);
2825	AssertLogRelMsgReturn(RT_SUCCESS(rc), ("RTThreadCreateF failed: %Rrc\n", rc), rc);
2826
2827	RTThreadUserWait(pThis->hThread, RT_MS_10SEC);
2828	AssertLogRel(pThis->hThreadRunLoop);
2829	#endif
2830
2831	#ifdef CORE_AUDIO_WITH_BREAKPOINT_TIMER
2832	/*
2833	* Create a IPRT timer. The TM timers won't necessarily work as EMT is probably busy.
2834	*/
2835	rc = RTTimerLRCreateEx(&pThis->hBreakpointTimer, 0 /no interval/, 0, drvHstAudCaBreakpointTimer, pThis);
2836	AssertRCReturn(rc, rc);
2837	#endif
2838
2839	/*
2840	* Determin the default devices.
2841	*/
2842	drvHstAudCaUpdateOneDefaultDevice(pThis, &pThis->OutputDevice, false /fInput/, false /fNotifty/);
2843	drvHstAudCaUpdateOneDefaultDevice(pThis, &pThis->InputDevice, true /fInput/, false /fNotifty/);
2844
2845	/*
2846	* Register callbacks for default device input and output changes.
2847	* (We just ignore failures here as there isn't much we can do about it,
2848	* and it isn't 100% critical.)
2849	*/
2850	AudioObjectPropertyAddress PropAddr =
2851	{
2852	/* .mSelector = */ kAudioHardwarePropertyDefaultInputDevice,
2853	/* .mScope = */ kAudioObjectPropertyScopeGlobal,
2854	/* .mElement = */ kAudioObjectPropertyElementMaster
2855	};
2856
2857	OSStatus orc;
2858	orc = AudioObjectAddPropertyListener(kAudioObjectSystemObject, &PropAddr, drvHstAudCaDefaultDeviceChangedCallback, pThis);
2859	pThis->fRegisteredDefaultInputListener = orc == noErr;
2860	if ( orc != noErr
2861	&& orc != kAudioHardwareIllegalOperationError)
2862	LogRel(("CoreAudio: Failed to add the input default device changed listener: %d (%#x)\n", orc, orc));
2863
2864	PropAddr.mSelector = kAudioHardwarePropertyDefaultOutputDevice;
2865	orc = AudioObjectAddPropertyListener(kAudioObjectSystemObject, &PropAddr, drvHstAudCaDefaultDeviceChangedCallback, pThis);
2866	pThis->fRegisteredDefaultOutputListener = orc == noErr;
2867	if ( orc != noErr
2868	&& orc != kAudioHardwareIllegalOperationError)
2869	LogRel(("CoreAudio: Failed to add the output default device changed listener: %d (%#x)\n", orc, orc));
2870
2871	LogFlowFuncLeaveRC(rc);
2872	return rc;
2873	}
2874
2875
2876	/**
2877	* Char driver registration record.
2878	*/
2879	const PDMDRVREG g_DrvHostCoreAudio =
2880	{
2881	/* u32Version */
2882	PDM_DRVREG_VERSION,
2883	/* szName */
2884	"CoreAudio",
2885	/* szRCMod */
2886	"",
2887	/* szR0Mod */
2888	"",
2889	/* pszDescription */
2890	"Core Audio host driver",
2891	/* fFlags */
2892	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
2893	/* fClass. */
2894	PDM_DRVREG_CLASS_AUDIO,
2895	/* cMaxInstances */
2896	~0U,
2897	/* cbInstance */
2898	sizeof(DRVHOSTCOREAUDIO),
2899	/* pfnConstruct */
2900	drvHstAudCaConstruct,
2901	/* pfnDestruct */
2902	drvHstAudCaDestruct,
2903	/* pfnRelocate */
2904	NULL,
2905	/* pfnIOCtl */
2906	NULL,
2907	/* pfnPowerOn */
2908	NULL,
2909	/* pfnReset */
2910	NULL,
2911	/* pfnSuspend */
2912	NULL,
2913	/* pfnResume */
2914	NULL,
2915	/* pfnAttach */
2916	NULL,
2917	/* pfnDetach */
2918	NULL,
2919	/* pfnPowerOff */
2920	drvHstAudCaPowerOff,
2921	/* pfnSoftReset */
2922	NULL,
2923	/* u32EndVersion */
2924	PDM_DRVREG_VERSION
2925	};

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source: vbox/trunk/src/VBox/Devices/Audio/DrvHostAudioCoreAudio.cpp@ 98103

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