DrvHostAudioOss.cpp@ 88413

Last change on this file since 88413 was 88413, checked in by vboxsync, 4 years ago
DrvHostAudioOss: Build fix after PPDMAUDIOBACKENDSTREAM change. bugref:9890
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1	/* $Id: DrvHostAudioOss.cpp 88413 2021-04-08 12:02:59Z 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(POSSAUDIOSTREAM pStreamOSS, PDMAUDIOSTREAMCMD enmStreamCmd)
449	{
450	int rc = VINF_SUCCESS;
451
452	switch (enmStreamCmd)
453	{
454	case PDMAUDIOSTREAMCMD_ENABLE:
455	case PDMAUDIOSTREAMCMD_RESUME:
456	{
457	int mask = PCM_ENABLE_OUTPUT;
458	if (ioctl(pStreamOSS->hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
459	{
460	LogRel(("OSS: Failed to enable output stream: %s\n", strerror(errno)));
461	rc = RTErrConvertFromErrno(errno);
462	}
463
464	break;
465	}
466
467	case PDMAUDIOSTREAMCMD_DISABLE:
468	case PDMAUDIOSTREAMCMD_PAUSE:
469	{
470	int mask = 0;
471	if (ioctl(pStreamOSS->hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
472	{
473	LogRel(("OSS: Failed to disable output stream: %s\n", strerror(errno)));
474	rc = RTErrConvertFromErrno(errno);
475	}
476
477	break;
478	}
479
480	default:
481	rc = VERR_NOT_SUPPORTED;
482	break;
483	}
484
485	return rc;
486	}
487
488
489	/**
490	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamControl}
491	*/
492	static DECLCALLBACK(int) drvHostOssAudioHA_StreamControl(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
493	PDMAUDIOSTREAMCMD enmStreamCmd)
494	{
495	AssertPtrReturn(pInterface, VERR_INVALID_POINTER);
496	AssertPtrReturn(pStream, VERR_INVALID_POINTER);
497
498	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
499
500	if (!pStreamOSS->pCfg) /* Not (yet) configured? Skip. */
501	return VINF_SUCCESS;
502
503	int rc;
504	if (pStreamOSS->pCfg->enmDir == PDMAUDIODIR_IN)
505	rc = ossControlStreamIn(/pInterface, pStream, enmStreamCmd/);
506	else
507	rc = ossControlStreamOut(pStreamOSS, enmStreamCmd);
508
509	return rc;
510	}
511
512
513	/**
514	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetReadable}
515	*/
516	static DECLCALLBACK(uint32_t) drvHostOssAudioHA_StreamGetReadable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
517	{
518	RT_NOREF(pInterface, pStream);
519	return UINT32_MAX;
520	}
521
522
523	/**
524	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetWritable}
525	*/
526	static DECLCALLBACK(uint32_t) drvHostOssAudioHA_StreamGetWritable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
527	{
528	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
529	AssertPtr(pStreamOSS);
530	RT_NOREF(pInterface);
531
532	/*
533	* Note! This logic was found in StreamPlay and corrected a little.
534	*
535	* The logic here must match what StreamPlay does.
536	*/
537	audio_buf_info BufInfo = { 0, 0, 0, 0 };
538	int rc2 = ioctl(pStreamOSS->hFile, SNDCTL_DSP_GETOSPACE, &BufInfo);
539	AssertMsgReturn(rc2 >= 0, ("SNDCTL_DSP_GETOSPACE failed: %s (%d)\n", strerror(errno), errno), 0);
540
541	#if 0 /** @todo we could return BufInfo.bytes here iff StreamPlay didn't use the fragmented approach */
542	/** @todo r=bird: WTF do we make a fuss over BufInfo.bytes for when we don't
543	* even use it?!? */
544	AssertLogRelMsgReturn(BufInfo.bytes >= 0, ("OSS: Warning: Invalid available size: %d\n", BufInfo.bytes), VERR_INTERNAL_ERROR_3);
545	if ((unsigned)BufInfo.bytes > cbBuf)
546	{
547	LogRel2(("OSS: Warning: Too big output size (%d > %RU32), limiting to %RU32\n", BufInfo.bytes, cbBuf, cbBuf));
548	BufInfo.bytes = cbBuf;
549	/* Keep going. */
550	}
551	#endif
552
553	return (uint32_t)(BufInfo.fragments * BufInfo.fragsize);
554	}
555
556
557	/**
558	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetStatus}
559	*/
560	static DECLCALLBACK(PDMAUDIOSTREAMSTS) drvHostOssAudioHA_StreamGetStatus(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream)
561	{
562	RT_NOREF(pInterface, pStream);
563	return PDMAUDIOSTREAMSTS_FLAGS_INITIALIZED \| PDMAUDIOSTREAMSTS_FLAGS_ENABLED;
564	}
565
566
567	/**
568	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPlay}
569	*/
570	static DECLCALLBACK(int) drvHostOssAudioHA_StreamPlay(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
571	const void pvBuf, uint32_t cbBuf, uint32_t pcbWritten)
572	{
573	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
574	AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER);
575	RT_NOREF(pInterface);
576
577	/*
578	* Figure out now much to write.
579	*/
580	uint32_t cbToWrite;
581	audio_buf_info BufInfo;
582	int rc2 = ioctl(pStreamOSS->hFile, SNDCTL_DSP_GETOSPACE, &BufInfo);
583	AssertLogRelMsgReturn(rc2 >= 0, ("OSS: Failed to retrieve current playback buffer: %s (%d)\n", strerror(errno), errno),
584	RTErrConvertFromErrno(errno));
585
586	#if 0 /** @todo r=bird: WTF do we make a fuss over BufInfo.bytes for when we don't even use it?!? */
587	AssertLogRelMsgReturn(BufInfo.bytes >= 0, ("OSS: Warning: Invalid available size: %d\n", BufInfo.bytes), VERR_INTERNAL_ERROR_3);
588	if ((unsigned)BufInfo.bytes > cbBuf)
589	{
590	LogRel2(("OSS: Warning: Too big output size (%d > %RU32), limiting to %RU32\n", BufInfo.bytes, cbBuf, cbBuf));
591	BufInfo.bytes = cbBuf;
592	/* Keep going. */
593	}
594	#endif
595	cbToWrite = (unsigned)(BufInfo.fragments * BufInfo.fragsize);
596	cbToWrite = RT_MIN(cbToWrite, cbBuf);
597
598	/*
599	* Write.
600	*/
601	uint8_t const pbBuf = (uint8_t const )pvBuf;
602	uint32_t cbChunk = cbToWrite;
603	uint32_t offChunk = 0;
604	while (cbChunk > 0)
605	{
606	ssize_t cbWritten = write(pStreamOSS->hFile, &pbBuf[offChunk], RT_MIN(cbChunk, (unsigned)s_OSSConf.fragsize));
607	if (cbWritten >= 0)
608	{
609	AssertLogRelMsg(!(cbWritten & pStreamOSS->uAlign),
610	("OSS: Misaligned write (written %#zx, alignment %#x)\n", cbWritten, pStreamOSS->uAlign));
611
612	Assert((uint32_t)cbWritten <= cbChunk);
613	offChunk += (uint32_t)cbWritten;
614	cbChunk -= (uint32_t)cbWritten;
615	}
616	else
617	{
618	LogRel(("OSS: Failed writing output data: %s (%d)\n", strerror(errno), errno));
619	return RTErrConvertFromErrno(errno);
620	}
621	}
622
623	*pcbWritten = cbToWrite;
624	return VINF_SUCCESS;
625	}
626
627
628	/**
629	* @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCapture}
630	*/
631	static DECLCALLBACK(int) drvHostOssAudioHA_StreamCapture(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream,
632	void pvBuf, uint32_t uBufSize, uint32_t puRead)
633	{
634	POSSAUDIOSTREAM pStreamOSS = (POSSAUDIOSTREAM)pStream;
635	AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER);
636	RT_NOREF(pInterface);
637
638
639	size_t cbToRead = uBufSize;
640	LogFlowFunc(("cbToRead=%zi\n", cbToRead));
641
642	uint8_t * const pbDst = (uint8_t *)pvBuf;
643	size_t offWrite = 0;
644	while (cbToRead > 0)
645	{
646	ssize_t cbRead = read(pStreamOSS->hFile, &pbDst[offWrite], cbToRead);
647	if (cbRead)
648	{
649	LogFlowFunc(("cbRead=%zi, offWrite=%zu cbToRead=%zu\n", cbRead, offWrite, cbToRead));
650	Assert((ssize_t)cbToRead >= cbRead);
651	cbToRead -= cbRead;
652	offWrite += cbRead;
653	}
654	else
655	{
656	LogFunc(("cbRead=%zi, offWrite=%zu cbToRead=%zu errno=%d\n", cbRead, offWrite, cbToRead, errno));
657
658	/* Don't complain about errors if we've retrieved some audio data already. */
659	if (cbRead < 0 && offWrite == 0 && errno != EINTR && errno != EAGAIN)
660	{
661	AssertStmt(errno != 0, errno = EACCES);
662	int rc = RTErrConvertFromErrno(errno);
663	LogFunc(("Failed to read %zu input frames, errno=%d rc=%Rrc\n", cbToRead, errno, rc));
664	return rc;
665	}
666	break;
667	}
668	}
669
670	if (puRead)
671	*puRead = offWrite;
672	return VINF_SUCCESS;
673	}
674
675
676
677	/**
678	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
679	*/
680	static DECLCALLBACK(void ) drvHostOSSAudioQueryInterface(PPDMIBASE pInterface, const char pszIID)
681	{
682	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
683	PDRVHOSTOSSAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTOSSAUDIO);
684
685	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
686	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio);
687
688	return NULL;
689	}
690
691	/**
692	* Constructs an OSS audio driver instance.
693	*
694	* @copydoc FNPDMDRVCONSTRUCT
695	*/
696	static DECLCALLBACK(int) drvHostOSSAudioConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
697	{
698	RT_NOREF(pCfg, fFlags);
699	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
700	PDRVHOSTOSSAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTOSSAUDIO);
701	LogRel(("Audio: Initializing OSS driver\n"));
702
703	/*
704	* Init the static parts.
705	*/
706	pThis->pDrvIns = pDrvIns;
707	/* IBase */
708	pDrvIns->IBase.pfnQueryInterface = drvHostOSSAudioQueryInterface;
709	/* IHostAudio */
710	pThis->IHostAudio.pfnGetConfig = drvHostOssAudioHA_GetConfig;
711	pThis->IHostAudio.pfnGetStatus = drvHostOssAudioHA_GetStatus;
712	pThis->IHostAudio.pfnStreamCreate = drvHostOssAudioHA_StreamCreate;
713	pThis->IHostAudio.pfnStreamDestroy = drvHostOssAudioHA_StreamDestroy;
714	pThis->IHostAudio.pfnStreamControl = drvHostOssAudioHA_StreamControl;
715	pThis->IHostAudio.pfnStreamGetReadable = drvHostOssAudioHA_StreamGetReadable;
716	pThis->IHostAudio.pfnStreamGetWritable = drvHostOssAudioHA_StreamGetWritable;
717	pThis->IHostAudio.pfnStreamGetStatus = drvHostOssAudioHA_StreamGetStatus;
718	pThis->IHostAudio.pfnStreamPlay = drvHostOssAudioHA_StreamPlay;
719	pThis->IHostAudio.pfnStreamCapture = drvHostOssAudioHA_StreamCapture;
720	pThis->IHostAudio.pfnGetDevices = NULL;
721	pThis->IHostAudio.pfnStreamGetPending = NULL;
722
723	return VINF_SUCCESS;
724	}
725
726	/**
727	* Char driver registration record.
728	*/
729	const PDMDRVREG g_DrvHostOSSAudio =
730	{
731	/* u32Version */
732	PDM_DRVREG_VERSION,
733	/* szName */
734	"OSSAudio",
735	/* szRCMod */
736	"",
737	/* szR0Mod */
738	"",
739	/* pszDescription */
740	"OSS audio host driver",
741	/* fFlags */
742	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
743	/* fClass. */
744	PDM_DRVREG_CLASS_AUDIO,
745	/* cMaxInstances */
746	~0U,
747	/* cbInstance */
748	sizeof(DRVHOSTOSSAUDIO),
749	/* pfnConstruct */
750	drvHostOSSAudioConstruct,
751	/* pfnDestruct */
752	NULL,
753	/* pfnRelocate */
754	NULL,
755	/* pfnIOCtl */
756	NULL,
757	/* pfnPowerOn */
758	NULL,
759	/* pfnReset */
760	NULL,
761	/* pfnSuspend */
762	NULL,
763	/* pfnResume */
764	NULL,
765	/* pfnAttach */
766	NULL,
767	/* pfnDetach */
768	NULL,
769	/* pfnPowerOff */
770	NULL,
771	/* pfnSoftReset */
772	NULL,
773	/* u32EndVersion */
774	PDM_DRVREG_VERSION
775	};
776

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source: vbox/trunk/src/VBox/Devices/Audio/DrvHostAudioOss.cpp@ 88413

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