DrvAudioVideoRec.cpp@ 73380

Last change on this file since 73380 was 73380, checked in by vboxsync, 6 years ago
Audio/DrvAudioCommon.cpp: Reordering helper function parameters to emphasize the function usage (namespace) better. No functional changes.
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1	/* $Id: DrvAudioVideoRec.cpp 73380 2018-07-27 09:12:35Z vboxsync $ */
2	/** @file
3	* Video recording audio backend for Main.
4	*/
5
6	/*
7	* Copyright (C) 2016-2017 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	/* This code makes use of the Opus codec (libopus):
19	*
20	* Copyright 2001-2011 Xiph.Org, Skype Limited, Octasic,
21	* Jean-Marc Valin, Timothy B. Terriberry,
22	* CSIRO, Gregory Maxwell, Mark Borgerding,
23	* Erik de Castro Lopo
24	*
25	* Redistribution and use in source and binary forms, with or without
26	* modification, are permitted provided that the following conditions
27	* are met:
28	*
29	* - Redistributions of source code must retain the above copyright
30	* notice, this list of conditions and the following disclaimer.
31	*
32	* - Redistributions in binary form must reproduce the above copyright
33	* notice, this list of conditions and the following disclaimer in the
34	* documentation and/or other materials provided with the distribution.
35	*
36	* - Neither the name of Internet Society, IETF or IETF Trust, nor the
37	* names of specific contributors, may be used to endorse or promote
38	* products derived from this software without specific prior written
39	* permission.
40	*
41	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
42	* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
43	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
44	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
45	* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
46	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
47	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
48	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
49	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
50	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
51	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52	*
53	* Opus is subject to the royalty-free patent licenses which are
54	* specified at:
55	*
56	* Xiph.Org Foundation:
57	* https://datatracker.ietf.org/ipr/1524/
58	*
59	* Microsoft Corporation:
60	* https://datatracker.ietf.org/ipr/1914/
61	*
62	* Broadcom Corporation:
63	* https://datatracker.ietf.org/ipr/1526/
64	*
65	*/
66
67	/**
68	* This driver is part of Main and is responsible for providing audio
69	* data to Main's video capturing feature.
70	*
71	* The driver itself implements a PDM host audio backend, which in turn
72	* provides the driver with the required audio data and audio events.
73	*
74	* For now there is support for the following destinations (called "sinks"):
75	*
76	* - Direct writing of .webm files to the host.
77	* - Communicating with Main via the Console object to send the encoded audio data to.
78	* The Console object in turn then will route the data to the Display / video capturing interface then.
79	*/
80
81
82	/*********************************************************************************************************************************
83	* Header Files *
84	*********************************************************************************************************************************/
85	#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
86	#include "LoggingNew.h"
87
88	#include "DrvAudioVideoRec.h"
89	#include "ConsoleImpl.h"
90
91	#include "../../Devices/Audio/DrvAudio.h"
92	#include "WebMWriter.h"
93
94	#include <iprt/mem.h>
95	#include <iprt/cdefs.h>
96
97	#include <VBox/vmm/pdmaudioifs.h>
98	#include <VBox/vmm/pdmdrv.h>
99	#include <VBox/vmm/cfgm.h>
100	#include <VBox/err.h>
101
102	#ifdef VBOX_WITH_LIBOPUS
103	# include <opus.h>
104	#endif
105
106
107	/*********************************************************************************************************************************
108	* Defines *
109	*********************************************************************************************************************************/
110
111	#define AVREC_OPUS_HZ_MAX 48000 /** Maximum sample rate (in Hz) Opus can handle. */
112
113
114	/*********************************************************************************************************************************
115	* Structures and Typedefs *
116	*********************************************************************************************************************************/
117
118	/**
119	* Enumeration for specifying the recording container type.
120	*/
121	typedef enum AVRECCONTAINERTYPE
122	{
123	/** Unknown / invalid container type. */
124	AVRECCONTAINERTYPE_UNKNOWN = 0,
125	/** Recorded data goes to Main / Console. */
126	AVRECCONTAINERTYPE_MAIN_CONSOLE = 1,
127	/** Recorded data will be written to a .webm file. */
128	AVRECCONTAINERTYPE_WEBM = 2
129	} AVRECCONTAINERTYPE;
130
131	/**
132	* Structure for keeping generic container parameters.
133	*/
134	typedef struct AVRECCONTAINERPARMS
135	{
136	/** The container's type. */
137	AVRECCONTAINERTYPE enmType;
138
139	} AVRECCONTAINERPARMS, *PAVRECCONTAINERPARMS;
140
141	/**
142	* Structure for keeping container-specific data.
143	*/
144	typedef struct AVRECCONTAINER
145	{
146	/** Generic container parameters. */
147	AVRECCONTAINERPARMS Parms;
148
149	union
150	{
151	struct
152	{
153	/** Pointer to Console. */
154	Console *pConsole;
155	} Main;
156
157	struct
158	{
159	/** Pointer to WebM container to write recorded audio data to.
160	* See the AVRECMODE enumeration for more information. */
161	WebMWriter *pWebM;
162	/** Assigned track number from WebM container. */
163	uint8_t uTrack;
164	} WebM;
165	};
166	} AVRECCONTAINER, *PAVRECCONTAINER;
167
168	/**
169	* Structure for keeping generic codec parameters.
170	*/
171	typedef struct AVRECCODECPARMS
172	{
173	/** The encoding rate to use. */
174	uint32_t uHz;
175	/** Number of audio channels to encode.
176	* Currently we only supported stereo (2) channels. */
177	uint8_t cChannels;
178	/** Bits per sample. */
179	uint8_t cBits;
180	/** The codec's bitrate. 0 if not used / cannot be specified. */
181	uint32_t uBitrate;
182
183	} AVRECCODECPARMS, *PAVRECCODECPARMS;
184
185	/**
186	* Structure for keeping codec-specific data.
187	*/
188	typedef struct AVRECCODEC
189	{
190	/** Generic codec parameters. */
191	AVRECCODECPARMS Parms;
192	union
193	{
194	#ifdef VBOX_WITH_LIBOPUS
195	struct
196	{
197	/** Encoder we're going to use. */
198	OpusEncoder *pEnc;
199	/** Time (in ms) an (encoded) frame takes.
200	*
201	* For Opus, valid frame sizes are:
202	* ms Frame size
203	* 2.5 120
204	* 5 240
205	* 10 480
206	* 20 (Default) 960
207	* 40 1920
208	* 60 2880
209	*/
210	uint32_t msFrame;
211	} Opus;
212	#endif /* VBOX_WITH_LIBOPUS */
213	};
214
215	#ifdef VBOX_WITH_STATISTICS /** @todo Make these real STAM values. */
216	struct
217	{
218	/** Number of frames encoded. */
219	uint64_t cEncFrames;
220	/** Total time (in ms) of already encoded audio data. */
221	uint64_t msEncTotal;
222	} STAM;
223	#endif /* VBOX_WITH_STATISTICS */
224
225	} AVRECCODEC, *PAVRECCODEC;
226
227	typedef struct AVRECSINK
228	{
229	/** @todo Add types for container / codec as soon as we implement more stuff. */
230
231	/** Container data to use for data processing. */
232	AVRECCONTAINER Con;
233	/** Codec data this sink uses for encoding. */
234	AVRECCODEC Codec;
235	/** Timestamp (in ms) of when the sink was created. */
236	uint64_t tsStartMs;
237	} AVRECSINK, *PAVRECSINK;
238
239	/**
240	* Audio video recording (output) stream.
241	*/
242	typedef struct AVRECSTREAM
243	{
244	/** The stream's acquired configuration. */
245	PPDMAUDIOSTREAMCFG pCfg;
246	/** (Audio) frame buffer. */
247	PRTCIRCBUF pCircBuf;
248	/** Pointer to sink to use for writing. */
249	PAVRECSINK pSink;
250	/** Last encoded PTS (in ms). */
251	uint64_t uLastPTSMs;
252	} AVRECSTREAM, *PAVRECSTREAM;
253
254	/**
255	* Video recording audio driver instance data.
256	*/
257	typedef struct DRVAUDIOVIDEOREC
258	{
259	/** Pointer to audio video recording object. */
260	AudioVideoRec *pAudioVideoRec;
261	/** Pointer to the driver instance structure. */
262	PPDMDRVINS pDrvIns;
263	/** Pointer to host audio interface. */
264	PDMIHOSTAUDIO IHostAudio;
265	/** Pointer to the console object. */
266	ComPtr<Console> pConsole;
267	/** Pointer to the DrvAudio port interface that is above us. */
268	PPDMIAUDIOCONNECTOR pDrvAudio;
269	/** The driver's sink for writing output to. */
270	AVRECSINK Sink;
271	} DRVAUDIOVIDEOREC, *PDRVAUDIOVIDEOREC;
272
273	/** Makes DRVAUDIOVIDEOREC out of PDMIHOSTAUDIO. */
274	#define PDMIHOSTAUDIO_2_DRVAUDIOVIDEOREC(pInterface) /* (clang doesn't think it is a POD, thus _DYN.) */ \
275	( (PDRVAUDIOVIDEOREC)((uintptr_t)pInterface - RT_UOFFSETOF_DYN(DRVAUDIOVIDEOREC, IHostAudio)) )
276
277	/**
278	* Initializes a recording sink.
279	*
280	* @returns IPRT status code.
281	* @param pThis Driver instance.
282	* @param pSink Sink to initialize.
283	* @param pConParms Container parameters to set.
284	* @param pCodecParms Codec parameters to set.
285	*/
286	static int avRecSinkInit(PDRVAUDIOVIDEOREC pThis, PAVRECSINK pSink, PAVRECCONTAINERPARMS pConParms, PAVRECCODECPARMS pCodecParms)
287	{
288	uint32_t uHz = pCodecParms->uHz;
289	uint8_t cBits = pCodecParms->cBits;
290	uint8_t cChannels = pCodecParms->cChannels;
291	uint32_t uBitrate = pCodecParms->uBitrate;
292
293	/* Opus only supports certain input sample rates in an efficient manner.
294	* So make sure that we use those by resampling the data to the requested rate. */
295	if (uHz > 24000) uHz = AVREC_OPUS_HZ_MAX;
296	else if (uHz > 16000) uHz = 24000;
297	else if (uHz > 12000) uHz = 16000;
298	else if (uHz > 8000 ) uHz = 12000;
299	else uHz = 8000;
300
301	if (cChannels > 2)
302	{
303	LogRel(("VideoRec: More than 2 (stereo) channels are not supported at the moment\n"));
304	cChannels = 2;
305	}
306
307	LogRel2(("VideoRec: Recording audio in %RU16Hz, %RU8 channels, %RU32 bitrate\n", uHz, cChannels, uBitrate));
308
309	int orc;
310	OpusEncoder *pEnc = opus_encoder_create(uHz, cChannels, OPUS_APPLICATION_AUDIO, &orc);
311	if (orc != OPUS_OK)
312	{
313	LogRel(("VideoRec: Audio codec failed to initialize: %s\n", opus_strerror(orc)));
314	return VERR_AUDIO_BACKEND_INIT_FAILED;
315	}
316
317	AssertPtr(pEnc);
318
319	opus_encoder_ctl(pEnc, OPUS_SET_BITRATE(uBitrate));
320	if (orc != OPUS_OK)
321	{
322	opus_encoder_destroy(pEnc);
323	pEnc = NULL;
324
325	LogRel(("VideoRec: Audio codec failed to set bitrate (%RU32): %s\n", uBitrate, opus_strerror(orc)));
326	return VERR_AUDIO_BACKEND_INIT_FAILED;
327	}
328
329	int rc = VINF_SUCCESS;
330
331	try
332	{
333	switch (pConParms->enmType)
334	{
335	case AVRECCONTAINERTYPE_MAIN_CONSOLE:
336	{
337	if (pThis->pConsole)
338	{
339	pSink->Con.Main.pConsole = pThis->pConsole;
340	}
341	else
342	rc = VERR_NOT_SUPPORTED;
343	break;
344	}
345
346	case AVRECCONTAINERTYPE_WEBM:
347	{
348	#ifdef VBOX_AUDIO_DEBUG_DUMP_PCM_DATA
349	/* If we only record audio, create our own WebM writer instance here. */
350	if (!pSink->Con.WebM.pWebM) /* Do we already have our WebM writer instance? */
351	{
352	char szFile[RTPATH_MAX];
353	if (RTStrPrintf(szFile, sizeof(szFile), "%s%s",
354	VBOX_AUDIO_DEBUG_DUMP_PCM_DATA_PATH, "DrvAudioVideoRec.webm"))
355	{
356	/** @todo Add sink name / number to file name. */
357
358	pSink->Con.WebM.pWebM = new WebMWriter();
359	rc = pSink->Con.WebM.pWebM->Create(szFile,
360	/** @todo Add option to add some suffix if file exists instead of overwriting? */
361	RTFILE_O_CREATE_REPLACE \| RTFILE_O_WRITE \| RTFILE_O_DENY_NONE,
362	WebMWriter::AudioCodec_Opus, WebMWriter::VideoCodec_None);
363	if (RT_SUCCESS(rc))
364	{
365	rc = pSink->Con.WebM.pWebM->AddAudioTrack(uHz, cChannels, cBits,
366	&pSink->Con.WebM.uTrack);
367	if (RT_SUCCESS(rc))
368	{
369	LogRel(("VideoRec: Recording audio to file '%s'\n", szFile));
370	}
371	else
372	LogRel(("VideoRec: Error creating audio track for file '%s' (%Rrc)\n", szFile, rc));
373	}
374	else
375	LogRel(("VideoRec: Error creating audio file '%s' (%Rrc)\n", szFile, rc));
376	}
377	else
378	{
379	AssertFailed(); /* Should never happen. */
380	LogRel(("VideoRec: Error creating audio file path\n"));
381	}
382	}
383	#else
384	rc = VERR_NOT_SUPPORTED;
385	#endif /* VBOX_AUDIO_DEBUG_DUMP_PCM_DATA */
386	break;
387	}
388
389	default:
390	rc = VERR_NOT_SUPPORTED;
391	break;
392	}
393	}
394	catch (std::bad_alloc)
395	{
396	#ifdef VBOX_AUDIO_DEBUG_DUMP_PCM_DATA
397	rc = VERR_NO_MEMORY;
398	#endif
399	}
400
401	if (RT_SUCCESS(rc))
402	{
403	pSink->Con.Parms.enmType = pConParms->enmType;
404
405	pSink->Codec.Parms.uHz = uHz;
406	pSink->Codec.Parms.cChannels = cChannels;
407	pSink->Codec.Parms.cBits = cBits;
408	pSink->Codec.Parms.uBitrate = uBitrate;
409
410	pSink->Codec.Opus.pEnc = pEnc;
411	pSink->Codec.Opus.msFrame = 20; /** @todo 20 ms of audio data. Make this configurable? */
412
413	#ifdef VBOX_WITH_STATISTICS
414	pSink->Codec.STAM.cEncFrames = 0;
415	pSink->Codec.STAM.msEncTotal = 0;
416	#endif
417
418	pSink->tsStartMs = RTTimeMilliTS();
419	}
420	else
421	{
422	if (pEnc)
423	{
424	opus_encoder_destroy(pEnc);
425	pEnc = NULL;
426	}
427
428	LogRel(("VideoRec: Error creating sink (%Rrc)\n", rc));
429	}
430
431	return rc;
432	}
433
434
435	/**
436	* Shuts down (closes) a recording sink,
437	*
438	* @returns IPRT status code.
439	* @param pSink Recording sink to shut down.
440	*/
441	static void avRecSinkShutdown(PAVRECSINK pSink)
442	{
443	AssertPtrReturnVoid(pSink);
444
445	#ifdef VBOX_WITH_LIBOPUS
446	if (pSink->Codec.Opus.pEnc)
447	{
448	opus_encoder_destroy(pSink->Codec.Opus.pEnc);
449	pSink->Codec.Opus.pEnc = NULL;
450	}
451	#endif
452	switch (pSink->Con.Parms.enmType)
453	{
454	case AVRECCONTAINERTYPE_WEBM:
455	{
456	if (pSink->Con.WebM.pWebM)
457	{
458	LogRel2(("VideoRec: Finished recording audio to file '%s' (%zu bytes)\n",
459	pSink->Con.WebM.pWebM->GetFileName().c_str(), pSink->Con.WebM.pWebM->GetFileSize()));
460
461	int rc2 = pSink->Con.WebM.pWebM->Close();
462	AssertRC(rc2);
463
464	delete pSink->Con.WebM.pWebM;
465	pSink->Con.WebM.pWebM = NULL;
466	}
467	break;
468	}
469
470	case AVRECCONTAINERTYPE_MAIN_CONSOLE:
471	default:
472	break;
473	}
474	}
475
476
477	/**
478	* Creates an audio output stream and associates it with the specified recording sink.
479	*
480	* @returns IPRT status code.
481	* @param pThis Driver instance.
482	* @param pStreamAV Audio output stream to create.
483	* @param pSink Recording sink to associate audio output stream to.
484	* @param pCfgReq Requested configuration by the audio backend.
485	* @param pCfgAcq Acquired configuration by the audio output stream.
486	*/
487	static int avRecCreateStreamOut(PDRVAUDIOVIDEOREC pThis, PAVRECSTREAM pStreamAV,
488	PAVRECSINK pSink, PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
489	{
490	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
491	AssertPtrReturn(pStreamAV, VERR_INVALID_POINTER);
492	AssertPtrReturn(pSink, VERR_INVALID_POINTER);
493	AssertPtrReturn(pCfgReq, VERR_INVALID_POINTER);
494	AssertPtrReturn(pCfgAcq, VERR_INVALID_POINTER);
495
496	if (pCfgReq->DestSource.Dest != PDMAUDIOPLAYBACKDEST_FRONT)
497	{
498	AssertFailed();
499
500	LogRel2(("VideoRec: Support for surround audio not implemented yet\n"));
501	return VERR_NOT_SUPPORTED;
502	}
503
504	int rc = VINF_SUCCESS;
505
506	#ifdef VBOX_WITH_LIBOPUS
507	const unsigned cFrames = 2; /** @todo Use the PreRoll param for that? */
508
509	const uint32_t csFrame = pSink->Codec.Parms.uHz / (1000 /* s in ms */ / pSink->Codec.Opus.msFrame);
510	const uint32_t cbFrame = csFrame * pSink->Codec.Parms.cChannels * (pSink->Codec.Parms.cBits / 8 /* Bytes */);
511
512	rc = RTCircBufCreate(&pStreamAV->pCircBuf, cbFrame * cFrames);
513	if (RT_SUCCESS(rc))
514	{
515	pStreamAV->pSink = pSink; /* Assign sink to stream. */
516	pStreamAV->uLastPTSMs = 0;
517
518	if (pCfgAcq)
519	{
520	/* Make sure to let the driver backend know that we need the audio data in
521	* a specific sampling rate Opus is optimized for. */
522	pCfgAcq->Props.uHz = pSink->Codec.Parms.uHz;
523	pCfgAcq->Props.cShift = PDMAUDIOPCMPROPS_MAKE_SHIFT_PARMS(pCfgAcq->Props.cBits, pCfgAcq->Props.cChannels);
524
525	/* Every Opus frame marks a period for now. Optimize this later. */
526	pCfgAcq->Backend.cfPeriod = DrvAudioHlpMsToFrames(pSink->Codec.Opus.msFrame, &pCfgAcq->Props); /** @todo Make this configurable. */
527	}
528	}
529	#else
530	RT_NOREF(pThis, pSink, pStreamAV, pCfgReq, pCfgAcq);
531	rc = VERR_NOT_SUPPORTED;
532	#endif /* VBOX_WITH_LIBOPUS */
533
534	LogFlowFuncLeaveRC(rc);
535	return rc;
536	}
537
538
539	/**
540	* Destroys (closes) an audio output stream.
541	*
542	* @returns IPRT status code.
543	* @param pThis Driver instance.
544	* @param pStreamAV Audio output stream to destroy.
545	*/
546	static int avRecDestroyStreamOut(PDRVAUDIOVIDEOREC pThis, PAVRECSTREAM pStreamAV)
547	{
548	RT_NOREF(pThis);
549
550	if (pStreamAV->pCircBuf)
551	{
552	RTCircBufDestroy(pStreamAV->pCircBuf);
553	pStreamAV->pCircBuf = NULL;
554	}
555
556	return VINF_SUCCESS;
557	}
558
559
560	/**
561	* Controls an audio output stream
562	*
563	* @returns IPRT status code.
564	* @param pThis Driver instance.
565	* @param pStreamAV Audio output stream to control.
566	* @param enmStreamCmd Stream command to issue.
567	*/
568	static int avRecControlStreamOut(PDRVAUDIOVIDEOREC pThis,
569	PAVRECSTREAM pStreamAV, PDMAUDIOSTREAMCMD enmStreamCmd)
570	{
571	RT_NOREF(pThis, pStreamAV);
572
573	switch (enmStreamCmd)
574	{
575	case PDMAUDIOSTREAMCMD_ENABLE:
576	case PDMAUDIOSTREAMCMD_DISABLE:
577	case PDMAUDIOSTREAMCMD_RESUME:
578	case PDMAUDIOSTREAMCMD_PAUSE:
579	break;
580
581	default:
582	AssertMsgFailed(("Invalid command %ld\n", enmStreamCmd));
583	break;
584	}
585
586	return VINF_SUCCESS;
587	}
588
589
590	/**
591	* @interface_method_impl{PDMIHOSTAUDIO,pfnInit}
592	*/
593	static DECLCALLBACK(int) drvAudioVideoRecInit(PPDMIHOSTAUDIO pInterface)
594	{
595	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
596
597	LogFlowFuncEnter();
598
599	PDRVAUDIOVIDEOREC pThis = PDMIHOSTAUDIO_2_DRVAUDIOVIDEOREC(pInterface);
600
601	AVRECCONTAINERPARMS ContainerParms;
602	ContainerParms.enmType = AVRECCONTAINERTYPE_MAIN_CONSOLE; /** @todo Make this configurable. */
603
604	AVRECCODECPARMS CodecParms;
605	CodecParms.uHz = AVREC_OPUS_HZ_MAX; /** @todo Make this configurable. */
606	CodecParms.cChannels = 2; /** @todo Make this configurable. */
607	CodecParms.cBits = 16; /** @todo Make this configurable. */
608	CodecParms.uBitrate = 196000; /** @todo Make this configurable. */
609
610	int rc = avRecSinkInit(pThis, &pThis->Sink, &ContainerParms, &CodecParms);
611	if (RT_FAILURE(rc))
612	{
613	LogRel(("VideoRec: Audio recording driver failed to initialize, rc=%Rrc\n", rc));
614	}
615	else
616	LogRel2(("VideoRec: Audio recording driver initialized\n"));
617
618	return rc;
619	}
620
621
622	/**
623	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCapture}
624	*/
625	static DECLCALLBACK(int) drvAudioVideoRecStreamCapture(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
626	void pvBuf, uint32_t cxBuf, uint32_t pcxRead)
627	{
628	RT_NOREF(pInterface, pStream, pvBuf, cxBuf);
629
630	if (pcxRead)
631	*pcxRead = 0;
632
633	return VINF_SUCCESS;
634	}
635
636
637	/**
638	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPlay}
639	*/
640	static DECLCALLBACK(int) drvAudioVideoRecStreamPlay(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
641	const void pvBuf, uint32_t cxBuf, uint32_t pcxWritten)
642	{
643	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
644	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
645	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
646	AssertReturn(cxBuf, VERR_INVALID_PARAMETER);
647	/* pcxWritten is optional. */
648
649	PDRVAUDIOVIDEOREC pThis = PDMIHOSTAUDIO_2_DRVAUDIOVIDEOREC(pInterface);
650	RT_NOREF(pThis);
651	PAVRECSTREAM pStreamAV = (PAVRECSTREAM)pStream;
652
653	int rc = VINF_SUCCESS;
654
655	uint32_t cbWrittenTotal = 0;
656
657	/*
658	* Call the encoder with the data.
659	*/
660	#ifdef VBOX_WITH_LIBOPUS
661	PAVRECSINK pSink = pStreamAV->pSink;
662	AssertPtr(pSink);
663	PRTCIRCBUF pCircBuf = pStreamAV->pCircBuf;
664	AssertPtr(pCircBuf);
665
666	void *pvCircBuf;
667	size_t cbCircBuf;
668
669	uint32_t cbToWrite = cxBuf;
670
671	/*
672	* Fetch as much as we can into our internal ring buffer.
673	*/
674	while ( cbToWrite
675	&& RTCircBufFree(pCircBuf))
676	{
677	RTCircBufAcquireWriteBlock(pCircBuf, cbToWrite, &pvCircBuf, &cbCircBuf);
678
679	if (cbCircBuf)
680	{
681	memcpy(pvCircBuf, (uint8_t *)pvBuf + cbWrittenTotal, cbCircBuf),
682	cbWrittenTotal += (uint32_t)cbCircBuf;
683	Assert(cbToWrite >= cbCircBuf);
684	cbToWrite -= (uint32_t)cbCircBuf;
685	}
686
687	RTCircBufReleaseWriteBlock(pCircBuf, cbCircBuf);
688
689	if ( RT_FAILURE(rc)
690	\|\| !cbCircBuf)
691	{
692	break;
693	}
694	}
695
696	/*
697	* Process our internal ring buffer and encode the data.
698	*/
699
700	uint8_t abSrc[_64K]; /** @todo Fix! */
701	size_t cbSrc;
702
703	const uint32_t csFrame = pSink->Codec.Parms.uHz / (1000 /* s in ms */ / pSink->Codec.Opus.msFrame);
704	const uint32_t cbFrame = csFrame * pSink->Codec.Parms.cChannels * (pSink->Codec.Parms.cBits / 8 /* Bytes */);
705
706	/* Only encode data if we have data for the given time period (or more). */
707	while (RTCircBufUsed(pCircBuf) >= cbFrame)
708	{
709	cbSrc = 0;
710
711	while (cbSrc < cbFrame)
712	{
713	RTCircBufAcquireReadBlock(pCircBuf, cbFrame - cbSrc, &pvCircBuf, &cbCircBuf);
714
715	if (cbCircBuf)
716	{
717	memcpy(&abSrc[cbSrc], pvCircBuf, cbCircBuf);
718
719	cbSrc += cbCircBuf;
720	Assert(cbSrc <= sizeof(abSrc));
721	}
722
723	RTCircBufReleaseReadBlock(pCircBuf, cbCircBuf);
724
725	if (!cbCircBuf)
726	break;
727	}
728
729	# ifdef VBOX_AUDIO_DEBUG_DUMP_PCM_DATA
730	RTFILE fh;
731	RTFileOpen(&fh, VBOX_AUDIO_DEBUG_DUMP_PCM_DATA_PATH "DrvAudioVideoRec.pcm",
732	RTFILE_O_OPEN_CREATE \| RTFILE_O_APPEND \| RTFILE_O_WRITE \| RTFILE_O_DENY_NONE);
733	RTFileWrite(fh, abSrc, cbSrc, NULL);
734	RTFileClose(fh);
735	# endif
736
737	Assert(cbSrc == cbFrame);
738
739	/*
740	* Opus always encodes PER FRAME, that is, exactly 2.5, 5, 10, 20, 40 or 60 ms of audio data.
741	*
742	* A packet can have up to 120ms worth of audio data.
743	* Anything > 120ms of data will result in a "corrupted package" error message by
744	* by decoding application.
745	*/
746	uint8_t abDst[_64K]; /** @todo Fix! */
747	size_t cbDst = sizeof(abDst);
748
749	/* Call the encoder to encode one frame per iteration. */
750	opus_int32 cbWritten = opus_encode(pSink->Codec.Opus.pEnc,
751	(opus_int16 *)abSrc, csFrame, abDst, (opus_int32)cbDst);
752	if (cbWritten > 0)
753	{
754	/* Get overall frames encoded. */
755	const uint32_t cEncFrames = opus_packet_get_nb_frames(abDst, cbWritten);
756
757	# ifdef VBOX_WITH_STATISTICS
758	pSink->Codec.STAM.cEncFrames += cEncFrames;
759	pSink->Codec.STAM.msEncTotal += pSink->Codec.Opus.msFrame * cEncFrames;
760
761	LogFunc(("%RU64ms [%RU64 frames]: cbSrc=%zu, cbDst=%zu, cEncFrames=%RU32\n",
762	pSink->Codec.STAM.msEncTotal, pSink->Codec.STAM.cEncFrames, cbSrc, cbDst, cEncFrames));
763	# endif
764	Assert((uint32_t)cbWritten <= cbDst);
765	cbDst = RT_MIN((uint32_t)cbWritten, cbDst); /* Update cbDst to actual bytes encoded (written). */
766
767	Assert(cEncFrames == 1); /* At the moment we encode exactly one frame per frame. */
768
769	if (pStreamAV->uLastPTSMs == 0)
770	pStreamAV->uLastPTSMs = RTTimeMilliTS() - pSink->tsStartMs;
771
772	const uint64_t uDurationMs = pSink->Codec.Opus.msFrame * cEncFrames;
773	const uint64_t uPTSMs = pStreamAV->uLastPTSMs + uDurationMs;
774
775	pStreamAV->uLastPTSMs += uDurationMs;
776
777	switch (pSink->Con.Parms.enmType)
778	{
779	case AVRECCONTAINERTYPE_MAIN_CONSOLE:
780	{
781	HRESULT hr = pSink->Con.Main.pConsole->i_audioVideoRecSendAudio(abDst, cbDst, uPTSMs);
782	Assert(hr == S_OK);
783	RT_NOREF(hr);
784
785	break;
786	}
787
788	case AVRECCONTAINERTYPE_WEBM:
789	{
790	WebMWriter::BlockData_Opus blockData = { abDst, cbDst, uPTSMs };
791	rc = pSink->Con.WebM.pWebM->WriteBlock(pSink->Con.WebM.uTrack, &blockData, sizeof(blockData));
792	AssertRC(rc);
793
794	break;
795	}
796
797	default:
798	AssertFailedStmt(rc = VERR_NOT_IMPLEMENTED);
799	break;
800	}
801	}
802	else if (cbWritten < 0)
803	{
804	AssertMsgFailed(("Encoding failed: %s\n", opus_strerror(cbWritten)));
805	rc = VERR_INVALID_PARAMETER;
806	}
807
808	if (RT_FAILURE(rc))
809	break;
810	}
811
812	if (pcxWritten)
813	*pcxWritten = cbWrittenTotal;
814	#else
815	/* Report back all data as being processed. */
816	if (pcxWritten)
817	*pcxWritten = cxBuf;
818
819	rc = VERR_NOT_SUPPORTED;
820	#endif /* VBOX_WITH_LIBOPUS */
821
822	LogFlowFunc(("csReadTotal=%RU32, rc=%Rrc\n", cbWrittenTotal, rc));
823	return rc;
824	}
825
826
827	/**
828	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetConfig}
829	*/
830	static DECLCALLBACK(int) drvAudioVideoRecGetConfig(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDCFG pBackendCfg)
831	{
832	RT_NOREF(pInterface);
833	AssertPtrReturn(pBackendCfg, VERR_INVALID_POINTER);
834
835	pBackendCfg->cbStreamOut = sizeof(AVRECSTREAM);
836	pBackendCfg->cbStreamIn = 0;
837	pBackendCfg->cMaxStreamsIn = 0;
838	pBackendCfg->cMaxStreamsOut = UINT32_MAX;
839
840	return VINF_SUCCESS;
841	}
842
843
844	/**
845	* @interface_method_impl{PDMIHOSTAUDIO,pfnShutdown}
846	*/
847	static DECLCALLBACK(void) drvAudioVideoRecShutdown(PPDMIHOSTAUDIO pInterface)
848	{
849	LogFlowFuncEnter();
850
851	PDRVAUDIOVIDEOREC pThis = PDMIHOSTAUDIO_2_DRVAUDIOVIDEOREC(pInterface);
852
853	avRecSinkShutdown(&pThis->Sink);
854	}
855
856
857	/**
858	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetStatus}
859	*/
860	static DECLCALLBACK(PDMAUDIOBACKENDSTS) drvAudioVideoRecGetStatus(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir)
861	{
862	RT_NOREF(enmDir);
863	AssertPtrReturn(pInterface, PDMAUDIOBACKENDSTS_UNKNOWN);
864
865	return PDMAUDIOBACKENDSTS_RUNNING;
866	}
867
868
869	/**
870	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCreate}
871	*/
872	static DECLCALLBACK(int) drvAudioVideoRecStreamCreate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
873	PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
874	{
875	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
876	AssertPtrReturn(pCfgReq, VERR_INVALID_POINTER);
877	AssertPtrReturn(pCfgAcq, VERR_INVALID_POINTER);
878
879	if (pCfgReq->enmDir == PDMAUDIODIR_IN)
880	return VERR_NOT_SUPPORTED;
881
882	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
883
884	PDRVAUDIOVIDEOREC pThis = PDMIHOSTAUDIO_2_DRVAUDIOVIDEOREC(pInterface);
885	PAVRECSTREAM pStreamAV = (PAVRECSTREAM)pStream;
886
887	/* For now we only have one sink, namely the driver's one.
888	* Later each stream could have its own one, to e.g. router different stream to different sinks .*/
889	PAVRECSINK pSink = &pThis->Sink;
890
891	int rc = avRecCreateStreamOut(pThis, pStreamAV, pSink, pCfgReq, pCfgAcq);
892	if (RT_SUCCESS(rc))
893	{
894	pStreamAV->pCfg = DrvAudioHlpStreamCfgDup(pCfgAcq);
895	if (!pStreamAV->pCfg)
896	rc = VERR_NO_MEMORY;
897	}
898
899	return rc;
900	}
901
902
903	/**
904	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDestroy}
905	*/
906	static DECLCALLBACK(int) drvAudioVideoRecStreamDestroy(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
907	{
908	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
909	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
910
911	PDRVAUDIOVIDEOREC pThis = PDMIHOSTAUDIO_2_DRVAUDIOVIDEOREC(pInterface);
912	PAVRECSTREAM pStreamAV = (PAVRECSTREAM)pStream;
913
914	if (!pStreamAV->pCfg) /* Not (yet) configured? Skip. */
915	return VINF_SUCCESS;
916
917	int rc = VINF_SUCCESS;
918
919	if (pStreamAV->pCfg->enmDir == PDMAUDIODIR_OUT)
920	rc = avRecDestroyStreamOut(pThis, pStreamAV);
921
922	if (RT_SUCCESS(rc))
923	{
924	DrvAudioHlpStreamCfgFree(pStreamAV->pCfg);
925	pStreamAV->pCfg = NULL;
926	}
927
928	return rc;
929	}
930
931
932	/**
933	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamControl}
934	*/
935	static DECLCALLBACK(int) drvAudioVideoRecStreamControl(PPDMIHOSTAUDIO pInterface,
936	PPDMAUDIOBACKENDSTREAM pStream, PDMAUDIOSTREAMCMD enmStreamCmd)
937	{
938	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
939	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
940
941	PDRVAUDIOVIDEOREC pThis = PDMIHOSTAUDIO_2_DRVAUDIOVIDEOREC(pInterface);
942	PAVRECSTREAM pStreamAV = (PAVRECSTREAM)pStream;
943
944	if (!pStreamAV->pCfg) /* Not (yet) configured? Skip. */
945	return VINF_SUCCESS;
946
947	if (pStreamAV->pCfg->enmDir == PDMAUDIODIR_OUT)
948	return avRecControlStreamOut(pThis, pStreamAV, enmStreamCmd);
949
950	return VINF_SUCCESS;
951	}
952
953
954	/**
955	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetReadable}
956	*/
957	static DECLCALLBACK(uint32_t) drvAudioVideoRecStreamGetReadable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
958	{
959	RT_NOREF(pInterface, pStream);
960
961	return 0; /* Video capturing does not provide any input. */
962	}
963
964
965	/**
966	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetWritable}
967	*/
968	static DECLCALLBACK(uint32_t) drvAudioVideoRecStreamGetWritable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
969	{
970	RT_NOREF(pInterface, pStream);
971
972	return UINT32_MAX;
973	}
974
975
976	/**
977	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetStatus}
978	*/
979	static DECLCALLBACK(PDMAUDIOSTREAMSTS) drvAudioVideoRecStreamGetStatus(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
980	{
981	RT_NOREF(pInterface, pStream);
982
983	return (PDMAUDIOSTREAMSTS_FLAG_INITIALIZED \| PDMAUDIOSTREAMSTS_FLAG_ENABLED);
984	}
985
986
987	/**
988	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamIterate}
989	*/
990	static DECLCALLBACK(int) drvAudioVideoRecStreamIterate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
991	{
992	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
993	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
994
995	LogFlowFuncEnter();
996
997	/* Nothing to do here for video recording. */
998	return VINF_SUCCESS;
999	}
1000
1001
1002	/**
1003	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
1004	*/
1005	static DECLCALLBACK(void ) drvAudioVideoRecQueryInterface(PPDMIBASE pInterface, const char pszIID)
1006	{
1007	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
1008	PDRVAUDIOVIDEOREC pThis = PDMINS_2_DATA(pDrvIns, PDRVAUDIOVIDEOREC);
1009
1010	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
1011	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio);
1012	return NULL;
1013	}
1014
1015
1016	AudioVideoRec::AudioVideoRec(Console *pConsole)
1017	: AudioDriver(pConsole)
1018	, mpDrv(NULL)
1019	{
1020	}
1021
1022
1023	AudioVideoRec::~AudioVideoRec(void)
1024	{
1025	if (mpDrv)
1026	{
1027	mpDrv->pAudioVideoRec = NULL;
1028	mpDrv = NULL;
1029	}
1030	}
1031
1032
1033	/**
1034	* @copydoc AudioDriver::configureDriver
1035	*/
1036	int AudioVideoRec::configureDriver(PCFGMNODE pLunCfg)
1037	{
1038	CFGMR3InsertInteger(pLunCfg, "Object", (uintptr_t)mpConsole->i_getAudioVideoRec());
1039	CFGMR3InsertInteger(pLunCfg, "ObjectConsole", (uintptr_t)mpConsole);
1040
1041	return VINF_SUCCESS;
1042	}
1043
1044
1045	/**
1046	* Construct a audio video recording driver instance.
1047	*
1048	* @copydoc FNPDMDRVCONSTRUCT
1049	*/
1050	/* static */
1051	DECLCALLBACK(int) AudioVideoRec::drvConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
1052	{
1053	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
1054	PDRVAUDIOVIDEOREC pThis = PDMINS_2_DATA(pDrvIns, PDRVAUDIOVIDEOREC);
1055	RT_NOREF(fFlags);
1056
1057	LogRel(("Audio: Initializing video recording audio driver\n"));
1058	LogFlowFunc(("fFlags=0x%x\n", fFlags));
1059
1060	AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
1061	("Configuration error: Not possible to attach anything to this driver!\n"),
1062	VERR_PDM_DRVINS_NO_ATTACH);
1063
1064	/*
1065	* Init the static parts.
1066	*/
1067	pThis->pDrvIns = pDrvIns;
1068	/* IBase */
1069	pDrvIns->IBase.pfnQueryInterface = drvAudioVideoRecQueryInterface;
1070	/* IHostAudio */
1071	PDMAUDIO_IHOSTAUDIO_CALLBACKS(drvAudioVideoRec);
1072
1073	/*
1074	* Get the Console object pointer.
1075	*/
1076	void *pvUser;
1077	int rc = CFGMR3QueryPtr(pCfg, "ObjectConsole", &pvUser); /** @todo r=andy Get rid of this hack and use IHostAudio::SetCallback. */
1078	AssertRCReturn(rc, rc);
1079
1080	/* CFGM tree saves the pointer to Console in the Object node of AudioVideoRec. */
1081	pThis->pConsole = (Console *)pvUser;
1082	AssertReturn(!pThis->pConsole.isNull(), VERR_INVALID_POINTER);
1083
1084	/*
1085	* Get the pointer to the audio driver instance.
1086	*/
1087	rc = CFGMR3QueryPtr(pCfg, "Object", &pvUser); /** @todo r=andy Get rid of this hack and use IHostAudio::SetCallback. */
1088	AssertRCReturn(rc, rc);
1089
1090	pThis->pAudioVideoRec = (AudioVideoRec *)pvUser;
1091	AssertPtrReturn(pThis->pAudioVideoRec, VERR_INVALID_POINTER);
1092
1093	pThis->pAudioVideoRec->mpDrv = pThis;
1094
1095	/*
1096	* Get the interface for the above driver (DrvAudio) to make mixer/conversion calls.
1097	* Described in CFGM tree.
1098	*/
1099	pThis->pDrvAudio = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMIAUDIOCONNECTOR);
1100	AssertMsgReturn(pThis->pDrvAudio, ("Configuration error: No upper interface specified!\n"), VERR_PDM_MISSING_INTERFACE_ABOVE);
1101
1102	#ifdef VBOX_AUDIO_DEBUG_DUMP_PCM_DATA
1103	RTFileDelete(VBOX_AUDIO_DEBUG_DUMP_PCM_DATA_PATH "DrvAudioVideoRec.webm");
1104	RTFileDelete(VBOX_AUDIO_DEBUG_DUMP_PCM_DATA_PATH "DrvAudioVideoRec.pcm");
1105	#endif
1106
1107	return VINF_SUCCESS;
1108	}
1109
1110
1111	/**
1112	* @interface_method_impl{PDMDRVREG,pfnDestruct}
1113	*/
1114	/* static */
1115	DECLCALLBACK(void) AudioVideoRec::drvDestruct(PPDMDRVINS pDrvIns)
1116	{
1117	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
1118	PDRVAUDIOVIDEOREC pThis = PDMINS_2_DATA(pDrvIns, PDRVAUDIOVIDEOREC);
1119	LogFlowFuncEnter();
1120
1121	/*
1122	* If the AudioVideoRec object is still alive, we must clear it's reference to
1123	* us since we'll be invalid when we return from this method.
1124	*/
1125	if (pThis->pAudioVideoRec)
1126	{
1127	pThis->pAudioVideoRec->mpDrv = NULL;
1128	pThis->pAudioVideoRec = NULL;
1129	}
1130	}
1131
1132
1133	/**
1134	* @interface_method_impl{PDMDRVREG,pfnAttach}
1135	*/
1136	/* static */
1137	DECLCALLBACK(int) AudioVideoRec::drvAttach(PPDMDRVINS pDrvIns, uint32_t fFlags)
1138	{
1139	RT_NOREF(pDrvIns, fFlags);
1140
1141	LogFlowFuncEnter();
1142
1143	return VINF_SUCCESS;
1144	}
1145
1146	/**
1147	* @interface_method_impl{PDMDRVREG,pfnDetach}
1148	*/
1149	/* static */
1150	DECLCALLBACK(void) AudioVideoRec::drvDetach(PPDMDRVINS pDrvIns, uint32_t fFlags)
1151	{
1152	RT_NOREF(pDrvIns, fFlags);
1153
1154	LogFlowFuncEnter();
1155	}
1156
1157	/**
1158	* Video recording audio driver registration record.
1159	*/
1160	const PDMDRVREG AudioVideoRec::DrvReg =
1161	{
1162	PDM_DRVREG_VERSION,
1163	/* szName */
1164	"AudioVideoRec",
1165	/* szRCMod */
1166	"",
1167	/* szR0Mod */
1168	"",
1169	/* pszDescription */
1170	"Audio driver for video recording",
1171	/* fFlags */
1172	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1173	/* fClass. */
1174	PDM_DRVREG_CLASS_AUDIO,
1175	/* cMaxInstances */
1176	~0U,
1177	/* cbInstance */
1178	sizeof(DRVAUDIOVIDEOREC),
1179	/* pfnConstruct */
1180	AudioVideoRec::drvConstruct,
1181	/* pfnDestruct */
1182	AudioVideoRec::drvDestruct,
1183	/* pfnRelocate */
1184	NULL,
1185	/* pfnIOCtl */
1186	NULL,
1187	/* pfnPowerOn */
1188	NULL,
1189	/* pfnReset */
1190	NULL,
1191	/* pfnSuspend */
1192	NULL,
1193	/* pfnResume */
1194	NULL,
1195	/* pfnAttach */
1196	AudioVideoRec::drvAttach,
1197	/* pfnDetach */
1198	AudioVideoRec::drvDetach,
1199	/* pfnPowerOff */
1200	NULL,
1201	/* pfnSoftReset */
1202	NULL,
1203	/* u32EndVersion */
1204	PDM_DRVREG_VERSION
1205	};
1206

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source: vbox/trunk/src/VBox/Main/src-client/DrvAudioVideoRec.cpp@ 73380

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