DrvHostAudioOss.cpp@ 88401

Last change on this file since 88401 was 88390, checked in by vboxsync, 4 years ago
Audio: Removed the pfnInit and pfnShutdown methods from PDMIHOSTAUDIO. These methods duplicates PDMDRVREG callbacks and were therefore superfluous. bugref:9890
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1	/* $Id: DrvHostAudioOss.cpp 88390 2021-04-07 10:35:06Z vboxsync $ */
2	/** @file
3	* Host audio driver - OSS (Open Sound System).
4	*/
5
6	/*
7	* Copyright (C) 2014-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#include <errno.h>
23	#include <fcntl.h>
24	#include <sys/ioctl.h>
25	#include <sys/mman.h>
26	#include <sys/soundcard.h>
27	#include <unistd.h>
28
29	#include <iprt/alloc.h>
30	#include <iprt/uuid.h> /* For PDMIBASE_2_PDMDRV. */
31
32	#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
33	#include <VBox/log.h>
34	#include <VBox/vmm/pdmaudioifs.h>
35	#include <VBox/vmm/pdmaudioinline.h>
36
37	#include "VBoxDD.h"
38
39
40	/*********************************************************************************************************************************
41	* Defines *
42	*********************************************************************************************************************************/
43	#if ((SOUND_VERSION > 360) && (defined(OSS_SYSINFO)))
44	/* OSS > 3.6 has a new syscall available for querying a bit more detailed information
45	* about OSS' audio capabilities. This is handy for e.g. Solaris. */
46	# define VBOX_WITH_AUDIO_OSS_SYSINFO 1
47	#endif
48
49	/** Makes DRVHOSTOSSAUDIO out of PDMIHOSTAUDIO. */
50	#define PDMIHOSTAUDIO_2_DRVHOSTOSSAUDIO(pInterface) \
51	( (PDRVHOSTOSSAUDIO)((uintptr_t)pInterface - RT_UOFFSETOF(DRVHOSTOSSAUDIO, IHostAudio)) )
52
53
54	/*********************************************************************************************************************************
55	* Structures *
56	*********************************************************************************************************************************/
57	/**
58	* OSS host audio driver instance data.
59	* @implements PDMIAUDIOCONNECTOR
60	*/
61	typedef struct DRVHOSTOSSAUDIO
62	{
63	/** Pointer to the driver instance structure. */
64	PPDMDRVINS pDrvIns;
65	/** Pointer to host audio interface. */
66	PDMIHOSTAUDIO IHostAudio;
67	/** Error count for not flooding the release log.
68	* UINT32_MAX for unlimited logging. */
69	uint32_t cLogErrors;
70	} DRVHOSTOSSAUDIO, *PDRVHOSTOSSAUDIO;
71
72	typedef struct OSSAUDIOSTREAMCFG
73	{
74	PDMAUDIOPCMPROPS Props;
75	uint16_t cFragments;
76	uint32_t cbFragmentSize;
77	} OSSAUDIOSTREAMCFG, *POSSAUDIOSTREAMCFG;
78
79	typedef struct OSSAUDIOSTREAM
80	{
81	/** The stream's acquired configuration. */
82	PPDMAUDIOSTREAMCFG pCfg;
83	/** Buffer alignment. */
84	uint8_t uAlign;
85	int hFile;
86	int cFragments;
87	int cbFragmentSize;
88	int old_optr;
89	} OSSAUDIOSTREAM, *POSSAUDIOSTREAM;
90
91	typedef struct OSSAUDIOCFG
92	{
93	int nfrags;
94	int fragsize;
95	const char *devpath_out;
96	const char *devpath_in;
97	int debug;
98	} OSSAUDIOCFG, *POSSAUDIOCFG;
99
100	static OSSAUDIOCFG s_OSSConf =
101	{
102	4,
103	4096,
104	"/dev/dsp",
105	"/dev/dsp",
106	0
107	};
108
109
110	/* http://www.df.lth.se/~john_e/gems/gem002d.html */
111	static uint32_t popcount(uint32_t u)
112	{
113	u = ((u&0x55555555) + ((u>>1)&0x55555555));
114	u = ((u&0x33333333) + ((u>>2)&0x33333333));
115	u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
116	u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
117	u = ( u&0x0000ffff) + (u>>16);
118	return u;
119	}
120
121
122	static uint32_t lsbindex(uint32_t u)
123	{
124	return popcount((u & -u) - 1);
125	}
126
127
128	static int ossOSSToAudioProps(PPDMAUDIOPCMPROPS pProps, int fmt, int cChannels, int uHz)
129	{
130	switch (fmt)
131	{
132	case AFMT_S8:
133	PDMAudioPropsInit(pProps, 1 /8-bit/, true /signed/, cChannels, uHz);
134	break;
135
136	case AFMT_U8:
137	PDMAudioPropsInit(pProps, 1 /8-bit/, false /signed/, cChannels, uHz);
138	break;
139
140	case AFMT_S16_LE:
141	PDMAudioPropsInitEx(pProps, 2 /16-bit/, true /signed/, cChannels, uHz, true /fLittleEndian/, false /fRaw/);
142	break;
143
144	case AFMT_U16_LE:
145	PDMAudioPropsInitEx(pProps, 2 /16-bit/, false /signed/, cChannels, uHz, true /fLittleEndian/, false /fRaw/);
146	break;
147
148	case AFMT_S16_BE:
149	PDMAudioPropsInitEx(pProps, 2 /16-bit/, true /signed/, cChannels, uHz, false /fLittleEndian/, false /fRaw/);
150	break;
151
152	case AFMT_U16_BE:
153	PDMAudioPropsInitEx(pProps, 2 /16-bit/, false /signed/, cChannels, uHz, false /fLittleEndian/, false /fRaw/);
154	break;
155
156	default:
157	AssertMsgFailedReturn(("Format %d not supported\n", fmt), VERR_NOT_SUPPORTED);
158	}
159
160	return VINF_SUCCESS;
161	}
162
163
164	static int ossStreamClose(int *phFile)
165	{
166	if (!phFile \|\| !phFile \|\| phFile == -1)
167	return VINF_SUCCESS;
168
169	int rc;
170	if (close(*phFile))
171	{
172	rc = RTErrConvertFromErrno(errno);
173	LogRel(("OSS: Closing stream failed: %s / %Rrc\n", strerror(errno), rc));
174	}
175	else
176	{
177	*phFile = -1;
178	rc = VINF_SUCCESS;
179	}
180
181	return rc;
182	}
183
184
185	/**
186	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetConfig}
187	*/
188	static DECLCALLBACK(int) drvHostOssAudioHA_GetConfig(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDCFG pBackendCfg)
189	{
190	RT_NOREF(pInterface);
191
192	RTStrCopy(pBackendCfg->szName, sizeof(pBackendCfg->szName), "OSS");
193
194	pBackendCfg->cbStreamIn = sizeof(OSSAUDIOSTREAM);
195	pBackendCfg->cbStreamOut = sizeof(OSSAUDIOSTREAM);
196
197	int hFile = open("/dev/dsp", O_WRONLY \| O_NONBLOCK, 0);
198	if (hFile == -1)
199	{
200	/* Try opening the mixing device instead. */
201	hFile = open("/dev/mixer", O_RDONLY \| O_NONBLOCK, 0);
202	}
203	if (hFile != -1)
204	{
205	int ossVer = -1;
206	int err = ioctl(hFile, OSS_GETVERSION, &ossVer);
207	if (err == 0)
208	{
209	LogRel2(("OSS: Using version: %d\n", ossVer));
210	#ifdef VBOX_WITH_AUDIO_OSS_SYSINFO
211	oss_sysinfo ossInfo;
212	RT_ZERO(ossInfo);
213	err = ioctl(hFile, OSS_SYSINFO, &ossInfo);
214	if (err == 0)
215	{
216	LogRel2(("OSS: Number of DSPs: %d\n", ossInfo.numaudios));
217	LogRel2(("OSS: Number of mixers: %d\n", ossInfo.nummixers));
218
219	int cDev = ossInfo.nummixers;
220	if (!cDev)
221	cDev = ossInfo.numaudios;
222
223	pBackendCfg->cMaxStreamsIn = UINT32_MAX;
224	pBackendCfg->cMaxStreamsOut = UINT32_MAX;
225	}
226	else
227	#endif
228	{
229	/* Since we cannot query anything, assume that we have at least
230	* one input and one output if we found "/dev/dsp" or "/dev/mixer". */
231
232	pBackendCfg->cMaxStreamsIn = UINT32_MAX;
233	pBackendCfg->cMaxStreamsOut = UINT32_MAX;
234	}
235	}
236	else
237	LogRel(("OSS: Unable to determine installed version: %s (%d)\n", strerror(err), err));
238	close(hFile);
239	}
240	else
241	LogRel(("OSS: No devices found, audio is not available\n"));
242
243	return VINF_SUCCESS;
244	}
245
246
247
248
249	/**
250	* @interface_method_impl{PDMIHOSTAUDIO,pfnGetStatus}
251	*/
252	static DECLCALLBACK(PDMAUDIOBACKENDSTS) drvHostOssAudioHA_GetStatus(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir)
253	{
254	AssertPtrReturn(pInterface, PDMAUDIOBACKENDSTS_UNKNOWN);
255	RT_NOREF(enmDir);
256
257	return PDMAUDIOBACKENDSTS_RUNNING;
258	}
259
260
261	static int ossStreamConfigure(int hFile, bool fInput, POSSAUDIOSTREAMCFG pOSSReq, POSSAUDIOSTREAMCFG pOSSAcq)
262	{
263	/*
264	* Format.
265	*/
266	int iFormat;
267	switch (PDMAudioPropsSampleSize(&pOSSReq->Props))
268	{
269	case 1:
270	iFormat = pOSSReq->Props.fSigned ? AFMT_S8 : AFMT_U8;
271	break;
272
273	case 2:
274	if (PDMAudioPropsIsLittleEndian(&pOSSReq->Props))
275	iFormat = pOSSReq->Props.fSigned ? AFMT_S16_LE : AFMT_U16_LE;
276	else
277	iFormat = pOSSReq->Props.fSigned ? AFMT_S16_BE : AFMT_U16_BE;
278	break;
279
280	default:
281	LogRel2(("OSS: Unsupported sample size: %u\n", PDMAudioPropsSampleSize(&pOSSReq->Props)));
282	return VERR_AUDIO_STREAM_COULD_NOT_CREATE;
283	}
284	AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_SAMPLESIZE, &iFormat) >= 0,
285	("OSS: Failed to set audio format to %d: %s (%d)\n", iFormat, strerror(errno), errno),
286	RTErrConvertFromErrno(errno));
287
288	/*
289	* Channel count.
290	*/
291	int cChannels = PDMAudioPropsChannels(&pOSSReq->Props);
292	AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_CHANNELS, &cChannels) >= 0,
293	("OSS: Failed to set number of audio channels (%RU8): %s (%d)\n",
294	PDMAudioPropsChannels(&pOSSReq->Props), strerror(errno), errno),
295	RTErrConvertFromErrno(errno));
296
297	/*
298	* Frequency.
299	*/
300	int iFrequenc = pOSSReq->Props.uHz;
301	AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_SPEED, &iFrequenc) >= 0,
302	("OSS: Failed to set audio frequency to %d Hz: %s (%d)\n", pOSSReq->Props.uHz, strerror(errno), errno),
303	RTErrConvertFromErrno(errno));
304
305
306	/*
307	* Set obsolete non-blocking call for input streams.
308	*/
309	if (fInput)
310	{
311	#if !(defined(VBOX) && defined(RT_OS_SOLARIS)) /* Obsolete on Solaris (using O_NONBLOCK is sufficient). */
312	AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_NONBLOCK, NULL) >= 0,
313	("OSS: Failed to set non-blocking mode: %s (%d)\n", strerror(errno), errno),
314	RTErrConvertFromErrno(errno));
315	#endif
316	}
317
318	/*
319	* Set fragment size and count.
320	*/
321	LogRel2(("OSS: Requested %RU16 %s fragments, %RU32 bytes each\n",
322	pOSSReq->cFragments, fInput ? "input" : "output", pOSSReq->cbFragmentSize));
323
324	int mmmmssss = (pOSSReq->cFragments << 16) \| lsbindex(pOSSReq->cbFragmentSize);
325	AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_SETFRAGMENT, &mmmmssss) >= 0,
326	("OSS: Failed to set %RU16 fragments to %RU32 bytes each: %s (%d)\n",
327	pOSSReq->cFragments, pOSSReq->cbFragmentSize, strerror(errno), errno),
328	RTErrConvertFromErrno(errno));
329
330	/*
331	* Get parameters and popuplate pOSSAcq.
332	*/
333	audio_buf_info BufInfo = { 0, 0, 0, 0 };
334	AssertLogRelMsgReturn(ioctl(hFile, fInput ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &BufInfo) >= 0,
335	("OSS: Failed to retrieve %s buffer length: %s (%d)\n",
336	fInput ? "input" : "output", strerror(errno), errno),
337	RTErrConvertFromErrno(errno));
338
339	int rc = ossOSSToAudioProps(&pOSSAcq->Props, iFormat, cChannels, iFrequenc);
340	if (RT_SUCCESS(rc))
341	{
342	pOSSAcq->cFragments = BufInfo.fragstotal;
343	pOSSAcq->cbFragmentSize = BufInfo.fragsize;
344
345	LogRel2(("OSS: Got %RU16 %s fragments, %RU32 bytes each\n",
346	pOSSAcq->cFragments, fInput ? "input" : "output", pOSSAcq->cbFragmentSize));
347	}
348
349	return rc;
350	}
351
352
353	/**
354	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCreate}
355	*/
356	static DECLCALLBACK(int) drvHostOssAudioHA_StreamCreate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
357	PPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq)
358	{
359	AssertPtr(pInterface); RT_NOREF(pInterface);
360	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
361	AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER);
362	AssertPtrReturn(pCfgReq, VERR_INVALID_POINTER);
363	AssertPtrReturn(pCfgAcq, VERR_INVALID_POINTER);
364
365	/*
366	* Open the device
367	*/
368	int rc;
369	if (pCfgReq->enmDir == PDMAUDIODIR_IN)
370	pStreamOSS->hFile = open(s_OSSConf.devpath_in, O_RDONLY \| O_NONBLOCK);
371	else
372	pStreamOSS->hFile = open(s_OSSConf.devpath_out, O_WRONLY);
373	if (pStreamOSS->hFile >= 0)
374	{
375	/*
376	* Configure it.
377	*/
378	OSSAUDIOSTREAMCFG ReqOssCfg;
379	RT_ZERO(ReqOssCfg);
380
381	memcpy(&ReqOssCfg.Props, &pCfgReq->Props, sizeof(PDMAUDIOPCMPROPS));
382	ReqOssCfg.cFragments = s_OSSConf.nfrags;
383	ReqOssCfg.cbFragmentSize = s_OSSConf.fragsize;
384
385	OSSAUDIOSTREAMCFG AcqOssCfg;
386	RT_ZERO(AcqOssCfg);
387	rc = ossStreamConfigure(pStreamOSS->hFile, pCfgReq->enmDir == PDMAUDIODIR_IN, &ReqOssCfg, &AcqOssCfg);
388	if (RT_SUCCESS(rc))
389	{
390	/*
391	* Complete the stream structure and fill in the pCfgAcq bits.
392	*/
393	if ((AcqOssCfg.cFragments * AcqOssCfg.cbFragmentSize) & pStreamOSS->uAlign)
394	LogRel(("OSS: Warning: Misaligned playback buffer: Size = %zu, Alignment = %u\n",
395	AcqOssCfg.cFragments * AcqOssCfg.cbFragmentSize, pStreamOSS->uAlign + 1));
396
397	memcpy(&pCfgAcq->Props, &AcqOssCfg.Props, sizeof(PDMAUDIOPCMPROPS));
398	pCfgAcq->Backend.cFramesPeriod = PDMAUDIOSTREAMCFG_B2F(pCfgAcq, AcqOssCfg.cbFragmentSize);
399	pCfgAcq->Backend.cFramesBufferSize = pCfgAcq->Backend.cFramesPeriod * 2; /* Use "double buffering" */
400	/** @todo Pre-buffering required? */
401
402	/*
403	* Duplicate the stream config and we're done!
404	*/
405	pStreamOSS->pCfg = PDMAudioStrmCfgDup(pCfgAcq);
406	if (pStreamOSS->pCfg)
407	return VINF_SUCCESS;
408
409	rc = VERR_NO_MEMORY;
410	}
411	ossStreamClose(&pStreamOSS->hFile);
412	}
413	else
414	{
415	rc = RTErrConvertFromErrno(errno);
416	LogRel(("OSS: Failed to open '%s': %s (%d) / %Rrc\n",
417	pCfgReq->enmDir == PDMAUDIODIR_IN ? s_OSSConf.devpath_in : s_OSSConf.devpath_out, strerror(errno), errno, rc));
418	}
419	return rc;
420	}
421
422
423	/**
424	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDestroy}
425	*/
426	static DECLCALLBACK(int) drvHostOssAudioHA_StreamDestroy(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
427	{
428	RT_NOREF(pInterface);
429	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
430	AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER);
431
432	ossStreamClose(&pStreamOSS->hFile);
433	PDMAudioStrmCfgFree(pStreamOSS->pCfg);
434	pStreamOSS->pCfg = NULL;
435
436	return VINF_SUCCESS;
437	}
438
439
440	static int ossControlStreamIn(/PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream, PDMAUDIOSTREAMCMD enmStreamCmd/ void)
441	{
442	/** @todo Nothing to do here right now!? */
443
444	return VINF_SUCCESS;
445	}
446
447
448	static int ossControlStreamOut(PPDMAUDIOBACKENDSTREAM pStream, PDMAUDIOSTREAMCMD enmStreamCmd)
449	{
450	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
451
452	int rc = VINF_SUCCESS;
453
454	switch (enmStreamCmd)
455	{
456	case PDMAUDIOSTREAMCMD_ENABLE:
457	case PDMAUDIOSTREAMCMD_RESUME:
458	{
459	int mask = PCM_ENABLE_OUTPUT;
460	if (ioctl(pStreamOSS->hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
461	{
462	LogRel(("OSS: Failed to enable output stream: %s\n", strerror(errno)));
463	rc = RTErrConvertFromErrno(errno);
464	}
465
466	break;
467	}
468
469	case PDMAUDIOSTREAMCMD_DISABLE:
470	case PDMAUDIOSTREAMCMD_PAUSE:
471	{
472	int mask = 0;
473	if (ioctl(pStreamOSS->hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
474	{
475	LogRel(("OSS: Failed to disable output stream: %s\n", strerror(errno)));
476	rc = RTErrConvertFromErrno(errno);
477	}
478
479	break;
480	}
481
482	default:
483	rc = VERR_NOT_SUPPORTED;
484	break;
485	}
486
487	return rc;
488	}
489
490
491	/**
492	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamControl}
493	*/
494	static DECLCALLBACK(int) drvHostOssAudioHA_StreamControl(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
495	PDMAUDIOSTREAMCMD enmStreamCmd)
496	{
497	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
498	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
499
500	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
501
502	if (!pStreamOSS->pCfg) /* Not (yet) configured? Skip. */
503	return VINF_SUCCESS;
504
505	int rc;
506	if (pStreamOSS->pCfg->enmDir == PDMAUDIODIR_IN)
507	rc = ossControlStreamIn(/pInterface, pStream, enmStreamCmd/);
508	else
509	rc = ossControlStreamOut(pStreamOSS, enmStreamCmd);
510
511	return rc;
512	}
513
514
515	/**
516	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetReadable}
517	*/
518	static DECLCALLBACK(uint32_t) drvHostOssAudioHA_StreamGetReadable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
519	{
520	RT_NOREF(pInterface, pStream);
521	return UINT32_MAX;
522	}
523
524
525	/**
526	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetWritable}
527	*/
528	static DECLCALLBACK(uint32_t) drvHostOssAudioHA_StreamGetWritable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
529	{
530	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
531	AssertPtr(pStreamOSS);
532	RT_NOREF(pInterface);
533
534	/*
535	* Note! This logic was found in StreamPlay and corrected a little.
536	*
537	* The logic here must match what StreamPlay does.
538	*/
539	audio_buf_info BufInfo = { 0, 0, 0, 0 };
540	int rc2 = ioctl(pStreamOSS->hFile, SNDCTL_DSP_GETOSPACE, &BufInfo);
541	AssertMsgReturn(rc2 >= 0, ("SNDCTL_DSP_GETOSPACE failed: %s (%d)\n", strerror(errno), errno), 0);
542
543	#if 0 /** @todo we could return BufInfo.bytes here iff StreamPlay didn't use the fragmented approach */
544	/** @todo r=bird: WTF do we make a fuss over BufInfo.bytes for when we don't
545	* even use it?!? */
546	AssertLogRelMsgReturn(BufInfo.bytes >= 0, ("OSS: Warning: Invalid available size: %d\n", BufInfo.bytes), VERR_INTERNAL_ERROR_3);
547	if ((unsigned)BufInfo.bytes > cbBuf)
548	{
549	LogRel2(("OSS: Warning: Too big output size (%d > %RU32), limiting to %RU32\n", BufInfo.bytes, cbBuf, cbBuf));
550	BufInfo.bytes = cbBuf;
551	/* Keep going. */
552	}
553	#endif
554
555	return (uint32_t)(BufInfo.fragments * BufInfo.fragsize);
556	}
557
558
559	/**
560	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetStatus}
561	*/
562	static DECLCALLBACK(PDMAUDIOSTREAMSTS) drvHostOssAudioHA_StreamGetStatus(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
563	{
564	RT_NOREF(pInterface, pStream);
565	return PDMAUDIOSTREAMSTS_FLAGS_INITIALIZED \| PDMAUDIOSTREAMSTS_FLAGS_ENABLED;
566	}
567
568
569	/**
570	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPlay}
571	*/
572	static DECLCALLBACK(int) drvHostOssAudioHA_StreamPlay(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
573	const void pvBuf, uint32_t cbBuf, uint32_t pcbWritten)
574	{
575	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
576	AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER);
577	RT_NOREF(pInterface);
578
579	/*
580	* Figure out now much to write.
581	*/
582	uint32_t cbToWrite;
583	audio_buf_info BufInfo;
584	int rc2 = ioctl(pStreamOSS->hFile, SNDCTL_DSP_GETOSPACE, &BufInfo);
585	AssertLogRelMsgReturn(rc2 >= 0, ("OSS: Failed to retrieve current playback buffer: %s (%d)\n", strerror(errno), errno),
586	RTErrConvertFromErrno(errno));
587
588	#if 0 /** @todo r=bird: WTF do we make a fuss over BufInfo.bytes for when we don't even use it?!? */
589	AssertLogRelMsgReturn(BufInfo.bytes >= 0, ("OSS: Warning: Invalid available size: %d\n", BufInfo.bytes), VERR_INTERNAL_ERROR_3);
590	if ((unsigned)BufInfo.bytes > cbBuf)
591	{
592	LogRel2(("OSS: Warning: Too big output size (%d > %RU32), limiting to %RU32\n", BufInfo.bytes, cbBuf, cbBuf));
593	BufInfo.bytes = cbBuf;
594	/* Keep going. */
595	}
596	#endif
597	cbToWrite = (unsigned)(BufInfo.fragments * BufInfo.fragsize);
598	cbToWrite = RT_MIN(cbToWrite, cbBuf);
599
600	/*
601	* Write.
602	*/
603	uint8_t const pbBuf = (uint8_t const )pvBuf;
604	uint32_t cbChunk = cbToWrite;
605	uint32_t offChunk = 0;
606	while (cbChunk > 0)
607	{
608	ssize_t cbWritten = write(pStreamOSS->hFile, &pbBuf[offChunk], RT_MIN(cbChunk, (unsigned)s_OSSConf.fragsize));
609	if (cbWritten >= 0)
610	{
611	AssertLogRelMsg(!(cbWritten & pStreamOSS->uAlign),
612	("OSS: Misaligned write (written %#zx, alignment %#x)\n", cbWritten, pStreamOSS->uAlign));
613
614	Assert((uint32_t)cbWritten <= cbChunk);
615	offChunk += (uint32_t)cbWritten;
616	cbChunk -= (uint32_t)cbWritten;
617	}
618	else
619	{
620	LogRel(("OSS: Failed writing output data: %s (%d)\n", strerror(errno), errno));
621	return RTErrConvertFromErrno(errno);
622	}
623	}
624
625	*pcbWritten = cbToWrite;
626	return VINF_SUCCESS;
627	}
628
629
630	/**
631	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCapture}
632	*/
633	static DECLCALLBACK(int) drvHostOssAudioHA_StreamCapture(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
634	void pvBuf, uint32_t uBufSize, uint32_t puRead)
635	{
636	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
637	AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER);
638	RT_NOREF(pInterface);
639
640
641	size_t cbToRead = uBufSize;
642	LogFlowFunc(("cbToRead=%zi\n", cbToRead));
643
644	uint8_t * const pbDst = (uint8_t *)pvBuf;
645	size_t offWrite = 0;
646	while (cbToRead > 0)
647	{
648	ssize_t cbRead = read(pStreamOSS->hFile, &pbDst[offWrite], cbToRead);
649	if (cbRead)
650	{
651	LogFlowFunc(("cbRead=%zi, offWrite=%zu cbToRead=%zu\n", cbRead, offWrite, cbToRead));
652	Assert((ssize_t)cbToRead >= cbRead);
653	cbToRead -= cbRead;
654	offWrite += cbRead;
655	}
656	else
657	{
658	LogFunc(("cbRead=%zi, offWrite=%zu cbToRead=%zu errno=%d\n", cbRead, offWrite, cbToRead, errno));
659
660	/* Don't complain about errors if we've retrieved some audio data already. */
661	if (cbRead < 0 && offWrite == 0 && errno != EINTR && errno != EAGAIN)
662	{
663	AssertStmt(errno != 0, errno = EACCES);
664	int rc = RTErrConvertFromErrno(errno);
665	LogFunc(("Failed to read %zu input frames, errno=%d rc=%Rrc\n", cbToRead, errno, rc));
666	return rc;
667	}
668	break;
669	}
670	}
671
672	if (puRead)
673	*puRead = offWrite;
674	return VINF_SUCCESS;
675	}
676
677
678
679	/**
680	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
681	*/
682	static DECLCALLBACK(void ) drvHostOSSAudioQueryInterface(PPDMIBASE pInterface, const char pszIID)
683	{
684	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
685	PDRVHOSTOSSAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTOSSAUDIO);
686
687	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
688	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio);
689
690	return NULL;
691	}
692
693	/**
694	* Constructs an OSS audio driver instance.
695	*
696	* @copydoc FNPDMDRVCONSTRUCT
697	*/
698	static DECLCALLBACK(int) drvHostOSSAudioConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
699	{
700	RT_NOREF(pCfg, fFlags);
701	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
702	PDRVHOSTOSSAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTOSSAUDIO);
703	LogRel(("Audio: Initializing OSS driver\n"));
704
705	/*
706	* Init the static parts.
707	*/
708	pThis->pDrvIns = pDrvIns;
709	/* IBase */
710	pDrvIns->IBase.pfnQueryInterface = drvHostOSSAudioQueryInterface;
711	/* IHostAudio */
712	pThis->IHostAudio.pfnGetConfig = drvHostOssAudioHA_GetConfig;
713	pThis->IHostAudio.pfnGetStatus = drvHostOssAudioHA_GetStatus;
714	pThis->IHostAudio.pfnStreamCreate = drvHostOssAudioHA_StreamCreate;
715	pThis->IHostAudio.pfnStreamDestroy = drvHostOssAudioHA_StreamDestroy;
716	pThis->IHostAudio.pfnStreamControl = drvHostOssAudioHA_StreamControl;
717	pThis->IHostAudio.pfnStreamGetReadable = drvHostOssAudioHA_StreamGetReadable;
718	pThis->IHostAudio.pfnStreamGetWritable = drvHostOssAudioHA_StreamGetWritable;
719	pThis->IHostAudio.pfnStreamGetStatus = drvHostOssAudioHA_StreamGetStatus;
720	pThis->IHostAudio.pfnStreamPlay = drvHostOssAudioHA_StreamPlay;
721	pThis->IHostAudio.pfnStreamCapture = drvHostOssAudioHA_StreamCapture;
722	pThis->IHostAudio.pfnGetDevices = NULL;
723	pThis->IHostAudio.pfnStreamGetPending = NULL;
724
725	return VINF_SUCCESS;
726	}
727
728	/**
729	* Char driver registration record.
730	*/
731	const PDMDRVREG g_DrvHostOSSAudio =
732	{
733	/* u32Version */
734	PDM_DRVREG_VERSION,
735	/* szName */
736	"OSSAudio",
737	/* szRCMod */
738	"",
739	/* szR0Mod */
740	"",
741	/* pszDescription */
742	"OSS audio host driver",
743	/* fFlags */
744	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
745	/* fClass. */
746	PDM_DRVREG_CLASS_AUDIO,
747	/* cMaxInstances */
748	~0U,
749	/* cbInstance */
750	sizeof(DRVHOSTOSSAUDIO),
751	/* pfnConstruct */
752	drvHostOSSAudioConstruct,
753	/* pfnDestruct */
754	NULL,
755	/* pfnRelocate */
756	NULL,
757	/* pfnIOCtl */
758	NULL,
759	/* pfnPowerOn */
760	NULL,
761	/* pfnReset */
762	NULL,
763	/* pfnSuspend */
764	NULL,
765	/* pfnResume */
766	NULL,
767	/* pfnAttach */
768	NULL,
769	/* pfnDetach */
770	NULL,
771	/* pfnPowerOff */
772	NULL,
773	/* pfnSoftReset */
774	NULL,
775	/* u32EndVersion */
776	PDM_DRVREG_VERSION
777	};
778

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source: vbox/trunk/src/VBox/Devices/Audio/DrvHostAudioOss.cpp@ 88401

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