DrvHostOSSAudio.cpp@ 54433

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1	/* $Id */
2	/** @file
3	* OSS (Open Sound System) host audio backend.
4	*/
5
6	/*
7	* Copyright (C) 2014-2015 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	#include "DrvAudio.h"
19	#include "AudioMixBuffer.h"
20
21	#include "VBoxDD.h"
22	#include "vl_vbox.h"
23
24	#include <errno.h>
25	#include <fcntl.h>
26	#include <sys/ioctl.h>
27	#include <sys/mman.h>
28	#include <sys/soundcard.h>
29	#include <unistd.h>
30
31	#include <iprt/alloc.h>
32	#include <iprt/uuid.h> /* For PDMIBASE_2_PDMDRV. */
33	#include <VBox/vmm/pdmaudioifs.h>
34
35	#ifdef LOG_GROUP
36	# undef LOG_GROUP
37	#endif
38	#define LOG_GROUP LOG_GROUP_DEV_AUDIO
39	#include <VBox/log.h>
40
41
42	/**
43	* OSS host audio driver instance data.
44	* @implements PDMIAUDIOCONNECTOR
45	*/
46	typedef struct DRVHOSTOSSAUDIO
47	{
48	/** Pointer to the driver instance structure. */
49	PPDMDRVINS pDrvIns;
50	/** Pointer to host audio interface. */
51	PDMIHOSTAUDIO IHostAudio;
52	/** Error count for not flooding the release log.
53	* UINT32_MAX for unlimited logging. */
54	uint32_t cLogErrors;
55	} DRVHOSTOSSAUDIO, *PDRVHOSTOSSAUDIO;
56
57	typedef struct OSSAUDIOSTREAMCFG
58	{
59	PDMAUDIOFMT enmFormat;
60	PDMAUDIOENDIANESS enmEndianess;
61	uint16_t uFreq;
62	uint8_t cChannels;
63	uint16_t cFragments;
64	uint32_t cbFragmentSize;
65	} OSSAUDIOSTREAMCFG, *POSSAUDIOSTREAMCFG;
66
67	typedef struct OSSAUDIOSTREAMIN
68	{
69	/** Note: Always must come first! */
70	PDMAUDIOHSTSTRMIN pStreamIn;
71	int hFile;
72	int cFragments;
73	int cbFragmentSize;
74	void *pvBuf;
75	size_t cbBuf;
76	int old_optr;
77	} OSSAUDIOSTREAMIN, *POSSAUDIOSTREAMIN;
78
79	typedef struct OSSAUDIOSTREAMOUT
80	{
81	/** Note: Always must come first! */
82	PDMAUDIOHSTSTRMOUT pStreamOut;
83	int hFile;
84	int cFragments;
85	int cbFragmentSize;
86	#ifndef RT_OS_L4
87	bool fMemMapped;
88	#endif
89	void *pvPCMBuf;
90	int old_optr;
91	} OSSAUDIOSTREAMOUT, *POSSAUDIOSTREAMOUT;
92
93	typedef struct OSSAUDIOCFG
94	{
95	#ifndef RT_OS_L4
96	bool try_mmap;
97	#endif
98	int nfrags;
99	int fragsize;
100	const char *devpath_out;
101	const char *devpath_in;
102	int debug;
103	} OSSAUDIOCFG, *POSSAUDIOCFG;
104
105	static OSSAUDIOCFG s_OSSConf =
106	{
107	#ifndef RT_OS_L4
108	false,
109	#endif
110	4,
111	4096,
112	"/dev/dsp",
113	"/dev/dsp",
114	0
115	};
116
117
118	/* http://www.df.lth.se/~john_e/gems/gem002d.html */
119	static uint32_t popcount(uint32_t u)
120	{
121	u = ((u&0x55555555) + ((u>>1)&0x55555555));
122	u = ((u&0x33333333) + ((u>>2)&0x33333333));
123	u = ((u&0x0f0f0f0f) + ((u>>4)&0x0f0f0f0f));
124	u = ((u&0x00ff00ff) + ((u>>8)&0x00ff00ff));
125	u = ( u&0x0000ffff) + (u>>16);
126	return u;
127	}
128
129	static uint32_t lsbindex(uint32_t u)
130	{
131	return popcount ((u&-u)-1);
132	}
133
134	static int drvHostOSSAudioFmtToOSS(PDMAUDIOFMT fmt)
135	{
136	switch (fmt)
137	{
138	case AUD_FMT_S8:
139	return AFMT_S8;
140
141	case AUD_FMT_U8:
142	return AFMT_U8;
143
144	case AUD_FMT_S16:
145	return AFMT_S16_LE;
146
147	case AUD_FMT_U16:
148	return AFMT_U16_LE;
149
150	default:
151	break;
152	}
153
154	AssertMsgFailed(("Format %ld not supported\n", fmt));
155	return AFMT_U8;
156	}
157
158	static int drvHostOSSAudioOSSToFmt(int fmt,
159	PDMAUDIOFMT pFmt, PDMAUDIOENDIANESS pEndianess)
160	{
161	switch (fmt)
162	{
163	case AFMT_S8:
164	*pFmt = AUD_FMT_S8;
165	if (pEndianess)
166	*pEndianess = PDMAUDIOENDIANESS_LITTLE;
167	break;
168
169	case AFMT_U8:
170	*pFmt = AUD_FMT_U8;
171	if (pEndianess)
172	*pEndianess = PDMAUDIOENDIANESS_LITTLE;
173	break;
174
175	case AFMT_S16_LE:
176	*pFmt = AUD_FMT_S16;
177	if (pEndianess)
178	*pEndianess = PDMAUDIOENDIANESS_LITTLE;
179	break;
180
181	case AFMT_U16_LE:
182	*pFmt = AUD_FMT_U16;
183	if (pEndianess)
184	*pEndianess = PDMAUDIOENDIANESS_LITTLE;
185	break;
186
187	case AFMT_S16_BE:
188	*pFmt = AUD_FMT_S16;
189	if (pEndianess)
190	*pEndianess = PDMAUDIOENDIANESS_BIG;
191	break;
192
193	case AFMT_U16_BE:
194	*pFmt = AUD_FMT_U16;
195	if (pEndianess)
196	*pEndianess = PDMAUDIOENDIANESS_BIG;
197	break;
198
199	default:
200	AssertMsgFailed(("Format %ld not supported\n", fmt));
201	return VERR_NOT_SUPPORTED;
202	}
203
204	return VINF_SUCCESS;
205	}
206
207	static int drvHostOSSAudioClose(int *phFile)
208	{
209	if (!phFile \|\| !*phFile)
210	return VINF_SUCCESS;
211
212	int rc;
213	if (close(*phFile))
214	{
215	LogRel(("OSS: Closing descriptor failed: %s\n",
216	strerror(errno)));
217	rc = VERR_GENERAL_FAILURE; /** @todo */
218	}
219	else
220	{
221	*phFile = -1;
222	rc = VINF_SUCCESS;
223	}
224
225	return rc;
226	}
227
228	static int drvHostOSSAudioOpen(bool fIn,
229	POSSAUDIOSTREAMCFG pReq, POSSAUDIOSTREAMCFG pObt,
230	int *phFile)
231	{
232	AssertPtrReturn(pReq, VERR_INVALID_POINTER);
233	AssertPtrReturn(pObt, VERR_INVALID_POINTER);
234	AssertPtrReturn(phFile, VERR_INVALID_POINTER);
235
236	int rc;
237	int hFile;
238
239	do
240	{
241	const char *pszDev = fIn ? s_OSSConf.devpath_in : s_OSSConf.devpath_out;
242	if (!pszDev)
243	{
244	LogRel(("OSS: Invalid or no %s device name set\n",
245	fIn ? "input" : "output"));
246	rc = VERR_INVALID_PARAMETER;
247	break;
248	}
249
250	hFile = open(pszDev, (fIn ? O_RDONLY : O_WRONLY) \| O_NONBLOCK);
251	if (hFile == -1)
252	{
253	LogRel(("OSS: Failed to open %s: %s\n", pszDev, strerror(errno)));
254	rc = RTErrConvertFromErrno(errno);
255	break;
256	}
257
258	int iFormat = drvHostOSSAudioFmtToOSS(pReq->enmFormat);
259	if (ioctl(hFile, SNDCTL_DSP_SAMPLESIZE, &iFormat))
260	{
261	LogRel(("OSS: Failed to set audio format to %ld\n",
262	iFormat, strerror(errno)));
263	rc = RTErrConvertFromErrno(errno);
264	break;
265	}
266
267	int cChannels = pReq->cChannels;
268	if (ioctl(hFile, SNDCTL_DSP_CHANNELS, &cChannels))
269	{
270	LogRel(("OSS: Failed to set number of audio channels (%d): %s\n",
271	pReq->cChannels, strerror(errno)));
272	rc = RTErrConvertFromErrno(errno);
273	break;
274	}
275
276	int freq = pReq->uFreq;
277	if (ioctl(hFile, SNDCTL_DSP_SPEED, &freq))
278	{
279	LogRel(("OSS: Failed to set audio frequency (%dHZ): %s\n",
280	pReq->uFreq, strerror(errno)));
281	rc = RTErrConvertFromErrno(errno);
282	break;
283	}
284
285	/* Obsolete on Solaris (using O_NONBLOCK is sufficient). */
286	#if !(defined(VBOX) && defined(RT_OS_SOLARIS))
287	if (ioctl(hFile, SNDCTL_DSP_NONBLOCK))
288	{
289	LogRel(("OSS: Failed to set non-blocking mode: %s\n",
290	strerror(errno)));
291	rc = RTErrConvertFromErrno(errno);
292	break;
293	}
294	#endif
295	int mmmmssss = (pReq->cFragments << 16) \| lsbindex(pReq->cbFragmentSize);
296	if (ioctl(hFile, SNDCTL_DSP_SETFRAGMENT, &mmmmssss))
297	{
298	LogRel(("OSS: Failed to set %RU16 fragments to %RU32 bytes each: %s\n",
299	pReq->cFragments, pReq->cbFragmentSize, strerror(errno)));
300	rc = RTErrConvertFromErrno(errno);
301	break;
302	}
303
304	audio_buf_info abinfo;
305	if (ioctl(hFile, fIn ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE,
306	&abinfo))
307	{
308	LogRel(("OSS: Failed to retrieve buffer length: %s\n", strerror(errno)));
309	rc = RTErrConvertFromErrno(errno);
310	break;
311	}
312
313	rc = drvHostOSSAudioOSSToFmt(iFormat,
314	&pObt->enmFormat, &pObt->enmEndianess);
315	if (RT_SUCCESS(rc))
316	{
317	pObt->cChannels = cChannels;
318	pObt->uFreq = freq;
319	pObt->cFragments = abinfo.fragstotal;
320	pObt->cbFragmentSize = abinfo.fragsize;
321
322	*phFile = hFile;
323	}
324	}
325	while (0);
326
327	if (RT_FAILURE(rc))
328	drvHostOSSAudioClose(&hFile);
329
330	LogFlowFuncLeaveRC(rc);
331	return rc;
332	}
333
334	static DECLCALLBACK(int) drvHostOSSAudioControlIn(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMIN pHstStrmIn,
335	PDMAUDIOSTREAMCMD enmStreamCmd)
336	{
337	NOREF(pInterface);
338	NOREF(pHstStrmIn);
339	NOREF(enmStreamCmd);
340
341	/** @todo Nothing to do here right now!? */
342
343	return VINF_SUCCESS;
344	}
345
346	static DECLCALLBACK(int) drvHostOSSAudioControlOut(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMOUT pHstStrmOut,
347	PDMAUDIOSTREAMCMD enmStreamCmd)
348	{
349	NOREF(pInterface);
350	AssertPtrReturn(pHstStrmOut, VERR_INVALID_POINTER);
351
352	POSSAUDIOSTREAMOUT pThisStrmOut = (POSSAUDIOSTREAMOUT)pHstStrmOut;
353
354	#ifdef RT_OS_L4
355	return VINF_SUCCESS;
356	#else
357	if (!pThisStrmOut->fMemMapped)
358	return VINF_SUCCESS;
359	#endif
360
361	int rc = VINF_SUCCESS;
362	int mask;
363	switch (enmStreamCmd)
364	{
365	case PDMAUDIOSTREAMCMD_ENABLE:
366	{
367	audio_pcm_info_clear_buf(&pHstStrmOut->Props,
368	pThisStrmOut->pvPCMBuf, audioMixBufSize(&pHstStrmOut->MixBuf));
369
370	mask = PCM_ENABLE_OUTPUT;
371	if (ioctl(pThisStrmOut->hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
372	{
373	LogRel(("OSS: Failed to enable output stream: %s\n", strerror(errno)));
374	rc = RTErrConvertFromErrno(errno);
375	}
376
377	break;
378	}
379
380	case PDMAUDIOSTREAMCMD_DISABLE:
381	{
382	mask = 0;
383	if (ioctl(pThisStrmOut->hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
384	{
385	LogRel(("OSS: Failed to disable output stream: %s\n", strerror(errno)));
386	rc = RTErrConvertFromErrno(errno);
387	}
388
389	break;
390	}
391
392	default:
393	AssertMsgFailed(("Invalid command %ld\n", enmStreamCmd));
394	rc = VERR_INVALID_PARAMETER;
395	break;
396	}
397
398	LogFlowFuncLeaveRC(rc);
399	return rc;
400	}
401
402	static DECLCALLBACK(int) drvHostOSSAudioInit(PPDMIHOSTAUDIO pInterface)
403	{
404	NOREF(pInterface);
405
406	LogFlowFuncEnter();
407
408	return VINF_SUCCESS;
409	}
410
411	static DECLCALLBACK(int) drvHostOSSAudioCaptureIn(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMIN pHstStrmIn,
412	uint32_t *pcSamplesCaptured)
413	{
414	NOREF(pInterface);
415	AssertPtrReturn(pHstStrmIn, VERR_INVALID_POINTER);
416
417	POSSAUDIOSTREAMIN pThisStrmIn = (POSSAUDIOSTREAMIN)pHstStrmIn;
418
419	int rc = VINF_SUCCESS;
420	size_t cbToRead = RT_MIN(pThisStrmIn->cbBuf,
421	audioMixBufFreeBytes(&pHstStrmIn->MixBuf));
422
423	LogFlowFunc(("cbToRead=%zu\n", cbToRead));
424
425	uint32_t cWrittenTotal = 0;
426	uint32_t cbTemp;
427	ssize_t cbRead;
428	size_t offWrite = 0;
429
430	while (cbToRead)
431	{
432	cbTemp = RT_MIN(cbToRead, pThisStrmIn->cbBuf);
433	AssertBreakStmt(cbTemp, rc = VERR_NO_DATA);
434	cbRead = read(pThisStrmIn->hFile, (uint8_t *)pThisStrmIn->pvBuf + offWrite, cbTemp);
435
436	LogFlowFunc(("cbRead=%zi, cbTemp=%RU32, cbToRead=%zu\n",
437	cbRead, cbTemp, cbToRead));
438
439	if (cbRead < 0)
440	{
441	switch (errno)
442	{
443	case 0:
444	{
445	LogFunc(("Failed to read %z frames\n", cbRead));
446	rc = VERR_ACCESS_DENIED;
447	break;
448	}
449
450	case EINTR:
451	case EAGAIN:
452	rc = VERR_NO_DATA;
453	break;
454
455	default:
456	LogFlowFunc(("Failed to read %zu input frames, rc=%Rrc\n",
457	cbTemp, rc));
458	rc = VERR_GENERAL_FAILURE; /** @todo */
459	break;
460	}
461
462	if (RT_FAILURE(rc))
463	break;
464	}
465	else if (cbRead)
466	{
467	uint32_t cWritten;
468	rc = audioMixBufWriteCirc(&pHstStrmIn->MixBuf,
469	pThisStrmIn->pvBuf, cbRead,
470	&cWritten);
471	if (RT_FAILURE(rc))
472	break;
473
474	uint32_t cbWritten = AUDIOMIXBUF_S2B(&pHstStrmIn->MixBuf, cWritten);
475
476	Assert(cbToRead >= cbWritten);
477	cbToRead -= cbWritten;
478	offWrite += cbWritten;
479	cWrittenTotal += cWritten;
480	}
481	else /* No more data, try next round. */
482	break;
483	}
484
485	if (rc == VERR_NO_DATA)
486	rc = VINF_SUCCESS;
487
488	if (RT_SUCCESS(rc))
489	{
490	uint32_t cProcessed = 0;
491	if (cWrittenTotal)
492	rc = audioMixBufMixToParent(&pHstStrmIn->MixBuf, cWrittenTotal,
493	&cProcessed);
494
495	if (pcSamplesCaptured)
496	*pcSamplesCaptured = cWrittenTotal;
497
498	LogFlowFunc(("cWrittenTotal=%RU32 (%RU32 processed), rc=%Rrc\n",
499	cWrittenTotal, cProcessed, rc));
500	}
501
502	LogFlowFuncLeaveRC(rc);
503	return rc;
504	}
505
506	static DECLCALLBACK(int) drvHostOSSAudioFiniIn(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMIN pHstStrmIn)
507	{
508	NOREF(pInterface);
509	AssertPtrReturn(pHstStrmIn, VERR_INVALID_POINTER);
510
511	POSSAUDIOSTREAMIN pThisStrmIn = (POSSAUDIOSTREAMIN)pHstStrmIn;
512
513	LogFlowFuncEnter();
514
515	if (pThisStrmIn->pvBuf)
516	{
517	RTMemFree(pThisStrmIn->pvBuf);
518	pThisStrmIn->pvBuf = NULL;
519	}
520
521	return VINF_SUCCESS;
522	}
523
524	static DECLCALLBACK(int) drvHostOSSAudioFiniOut(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMOUT pHstStrmOut)
525	{
526	NOREF(pInterface);
527	AssertPtrReturn(pHstStrmOut, VERR_INVALID_POINTER);
528
529	POSSAUDIOSTREAMOUT pThisStrmOut = (POSSAUDIOSTREAMOUT)pHstStrmOut;
530
531	LogFlowFuncEnter();
532
533	#ifndef RT_OS_L4
534	if (!pThisStrmOut->fMemMapped)
535	{
536	if (pThisStrmOut->pvPCMBuf)
537	{
538	RTMemFree(pThisStrmOut->pvPCMBuf);
539	pThisStrmOut->pvPCMBuf = NULL;
540	}
541	}
542	#endif
543
544	return VINF_SUCCESS;
545	}
546
547	static DECLCALLBACK(int) drvHostOSSAudioGetConf(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDCFG pCfg)
548	{
549	NOREF(pInterface);
550
551	pCfg->cbStreamOut = sizeof(OSSAUDIOSTREAMOUT);
552	pCfg->cbStreamIn = sizeof(OSSAUDIOSTREAMIN);
553	pCfg->cMaxHstStrmsOut = INT_MAX;
554	pCfg->cMaxHstStrmsIn = INT_MAX;
555
556	return VINF_SUCCESS;
557	}
558
559	static DECLCALLBACK(int) drvHostOSSAudioInitIn(PPDMIHOSTAUDIO pInterface,
560	PPDMAUDIOHSTSTRMIN pHstStrmIn, PPDMAUDIOSTREAMCFG pCfg,
561	PDMAUDIORECSOURCE enmRecSource,
562	uint32_t *pcSamples)
563	{
564	NOREF(pInterface);
565	AssertPtrReturn(pHstStrmIn, VERR_INVALID_POINTER);
566	AssertPtrReturn(pCfg, VERR_INVALID_POINTER);
567
568	POSSAUDIOSTREAMIN pThisStrmIn = (POSSAUDIOSTREAMIN)pHstStrmIn;
569
570	int rc;
571	int hFile = -1;
572
573	do
574	{
575	uint32_t cSamples;
576
577	OSSAUDIOSTREAMCFG reqStream, obtStream;
578	reqStream.enmFormat = pCfg->enmFormat;
579	reqStream.uFreq = pCfg->uHz;
580	reqStream.cChannels = pCfg->cChannels;
581	reqStream.cFragments = s_OSSConf.nfrags;
582	reqStream.cbFragmentSize = s_OSSConf.fragsize;
583
584	rc = drvHostOSSAudioOpen(true /* fIn */,
585	&reqStream, &obtStream, &hFile);
586	if (RT_SUCCESS(rc))
587	{
588	if (obtStream.cFragments * obtStream.cbFragmentSize & pHstStrmIn->Props.uAlign)
589	LogRel(("OSS: Warning: Misaligned DAC output buffer: Size = %zu, Alignment = %u\n",
590	obtStream.cFragments * obtStream.cbFragmentSize,
591	pHstStrmIn->Props.uAlign + 1));
592
593	pThisStrmIn->hFile = hFile;
594
595	PDMAUDIOSTREAMCFG streamCfg;
596	streamCfg.enmFormat = obtStream.enmFormat;
597	streamCfg.uHz = obtStream.uFreq;
598	streamCfg.cChannels = pCfg->cChannels;
599	streamCfg.enmEndianness = obtStream.enmEndianess;
600
601	rc = drvAudioStreamCfgToProps(&streamCfg, &pHstStrmIn->Props);
602	if (RT_SUCCESS(rc))
603	{
604	cSamples = (obtStream.cFragments * obtStream.cbFragmentSize)
605	>> pHstStrmIn->Props.cShift;
606	if (!cSamples)
607	rc = VERR_INVALID_PARAMETER;
608	}
609	}
610
611	if (RT_SUCCESS(rc))
612	{
613	size_t cbBuf = cSamples * (1 << pHstStrmIn->Props.cShift);
614	pThisStrmIn->pvBuf = RTMemAlloc(cbBuf);
615	if (!pThisStrmIn->pvBuf)
616	{
617	LogRel(("OSS: Failed allocating ADC buffer with %RU32 samples, each %d bytes\n",
618	cSamples, 1 << pHstStrmIn->Props.cShift));
619	rc = VERR_NO_MEMORY;
620	}
621
622	pThisStrmIn->cbBuf = cbBuf;
623
624	if (pcSamples)
625	*pcSamples = cSamples;
626	}
627
628	} while (0);
629
630	if (RT_FAILURE(rc))
631	drvHostOSSAudioClose(&hFile);
632
633	LogFlowFuncLeaveRC(rc);
634	return rc;
635	}
636
637	static DECLCALLBACK(int) drvHostOSSAudioInitOut(PPDMIHOSTAUDIO pInterface,
638	PPDMAUDIOHSTSTRMOUT pHstStrmOut, PPDMAUDIOSTREAMCFG pCfg,
639	uint32_t *pcSamples)
640	{
641	NOREF(pInterface);
642	AssertPtrReturn(pHstStrmOut, VERR_INVALID_POINTER);
643	AssertPtrReturn(pCfg, VERR_INVALID_POINTER);
644
645	POSSAUDIOSTREAMOUT pThisStrmOut = (POSSAUDIOSTREAMOUT)pHstStrmOut;
646
647	int rc;
648	int hFile = -1;
649
650	do
651	{
652	uint32_t cSamples;
653
654	OSSAUDIOSTREAMCFG reqStream, obtStream;
655	reqStream.enmFormat = pCfg->enmFormat;
656	reqStream.uFreq = pCfg->uHz;
657	reqStream.cChannels = pCfg->cChannels;
658	reqStream.cFragments = s_OSSConf.nfrags;
659	reqStream.cbFragmentSize = s_OSSConf.fragsize;
660
661	rc = drvHostOSSAudioOpen(false /* fIn */,
662	&reqStream, &obtStream, &hFile);
663	if (RT_SUCCESS(rc))
664	{
665	if (obtStream.cFragments * obtStream.cbFragmentSize & pHstStrmOut->Props.uAlign)
666	LogRel(("OSS: Warning: Misaligned DAC output buffer: Size = %zu, Alignment = %u\n",
667	obtStream.cFragments * obtStream.cbFragmentSize,
668	pHstStrmOut->Props.uAlign + 1));
669
670	pThisStrmOut->hFile = hFile;
671
672	PDMAUDIOSTREAMCFG streamCfg;
673	streamCfg.enmFormat = obtStream.enmFormat;
674	streamCfg.uHz = obtStream.uFreq;
675	streamCfg.cChannels = pCfg->cChannels;
676	streamCfg.enmEndianness = obtStream.enmEndianess;
677
678	rc = drvAudioStreamCfgToProps(&streamCfg, &pHstStrmOut->Props);
679	if (RT_SUCCESS(rc))
680	cSamples = (obtStream.cFragments * obtStream.cbFragmentSize)
681	>> pHstStrmOut->Props.cShift;
682	}
683
684	if (RT_SUCCESS(rc))
685	{
686	#ifndef RT_OS_L4
687	pThisStrmOut->fMemMapped = false;
688	if (s_OSSConf.try_mmap)
689	{
690	pThisStrmOut->pvPCMBuf = mmap(0, cSamples << pHstStrmOut->Props.cShift,
691	PROT_READ \| PROT_WRITE, MAP_SHARED, hFile, 0);
692	if (pThisStrmOut->pvPCMBuf == MAP_FAILED)
693	{
694	LogRel(("OSS: Failed to memory map %zu bytes of DAC output file: %s\n",
695	cSamples << pHstStrmOut->Props.cShift, strerror(errno)));
696	rc = RTErrConvertFromErrno(errno);
697	break;
698	}
699	else
700	{
701	int mask = 0;
702	if (ioctl(hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
703	{
704	LogRel(("OSS: Failed to retrieve initial trigger mask: %s\n",
705	strerror(errno)));
706	rc = RTErrConvertFromErrno(errno);
707	/* Note: No break here, need to unmap file first! */
708	}
709	else
710	{
711	mask = PCM_ENABLE_OUTPUT;
712	if (ioctl (hFile, SNDCTL_DSP_SETTRIGGER, &mask) < 0)
713	{
714	LogRel(("OSS: Failed to retrieve PCM_ENABLE_OUTPUT mask: %s\n",
715	strerror(errno)));
716	rc = RTErrConvertFromErrno(errno);
717	/* Note: No break here, need to unmap file first! */
718	}
719	else
720	pThisStrmOut->fMemMapped = true;
721	}
722
723	if (!pThisStrmOut->fMemMapped)
724	{
725	int rc2 = munmap(pThisStrmOut->pvPCMBuf,
726	cSamples << pHstStrmOut->Props.cShift);
727	if (rc2)
728	LogRel(("OSS: Failed to unmap DAC output file: %s\n",
729	strerror(errno)));
730
731	break;
732	}
733	}
734	}
735	#endif /* !RT_OS_L4 */
736
737	/* Memory mapping failed above? Try allocating an own buffer. */
738	#ifndef RT_OS_L4
739	if (!pThisStrmOut->fMemMapped)
740	{
741	#endif
742	LogFlowFunc(("cSamples=%RU32\n", cSamples));
743	pThisStrmOut->pvPCMBuf = RTMemAlloc(cSamples * (1 << pHstStrmOut->Props.cShift));
744	if (!pThisStrmOut->pvPCMBuf)
745	{
746	LogRel(("OSS: Failed allocating DAC buffer with %RU32 samples, each %d bytes\n",
747	cSamples, 1 << pHstStrmOut->Props.cShift));
748	rc = VERR_NO_MEMORY;
749	break;
750	}
751	#ifndef RT_OS_L4
752	}
753	#endif
754	if (pcSamples)
755	*pcSamples = cSamples;
756	}
757
758	} while (0);
759
760	if (RT_FAILURE(rc))
761	drvHostOSSAudioClose(&hFile);
762
763	LogFlowFuncLeaveRC(rc);
764	return rc;
765	}
766
767	static DECLCALLBACK(bool) drvHostOSSAudioIsEnabled(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir)
768	{
769	NOREF(pInterface);
770	NOREF(enmDir);
771	return true; /* Always all enabled. */
772	}
773
774	static DECLCALLBACK(int) drvHostOSSAudioPlayOut(PPDMIHOSTAUDIO pInterface, PPDMAUDIOHSTSTRMOUT pHstStrmOut,
775	uint32_t *pcSamplesPlayed)
776	{
777	NOREF(pInterface);
778	AssertPtrReturn(pHstStrmOut, VERR_INVALID_POINTER);
779
780	POSSAUDIOSTREAMOUT pThisStrmOut = (POSSAUDIOSTREAMOUT)pHstStrmOut;
781
782	int rc = VINF_SUCCESS;
783	uint32_t cbReadTotal = 0;
784	count_info cntinfo;
785
786	do
787	{
788	size_t cbBuf = audioMixBufSizeBytes(&pHstStrmOut->MixBuf);
789
790	uint32_t cLive = drvAudioHstOutSamplesLive(pHstStrmOut,
791	NULL /* pcStreamsLive */);
792	uint32_t cToRead;
793
794	#ifndef RT_OS_L4
795	if (pThisStrmOut->fMemMapped)
796	{
797	/* Get current playback pointer. */
798	int rc2 = ioctl(pThisStrmOut->hFile, SNDCTL_DSP_GETOPTR, &cntinfo);
799	if (!rc2)
800	{
801	LogRel(("OSS: Failed to retrieve current playback pointer: %s\n",
802	strerror(errno)));
803	rc = RTErrConvertFromErrno(errno);
804	break;
805	}
806
807	/* Nothing to play? */
808	if (cntinfo.ptr == pThisStrmOut->old_optr)
809	break;
810
811	int cbData;
812	if (cntinfo.ptr > pThisStrmOut->old_optr)
813	cbData = cntinfo.ptr - pThisStrmOut->old_optr;
814	else
815	cbData = cbBuf + cntinfo.ptr - pThisStrmOut->old_optr;
816	Assert(cbData);
817
818	cToRead = RT_MIN((uint32_t)AUDIOMIXBUF_B2S(&pHstStrmOut->MixBuf, cbData),
819	cLive);
820	}
821	else
822	{
823	#endif
824	audio_buf_info abinfo;
825	int rc2 = ioctl(pThisStrmOut->hFile, SNDCTL_DSP_GETOSPACE, &abinfo);
826	if (rc2 < 0)
827	{
828	LogRel(("OSS: Failed to retrieve current playback buffer: %s\n",
829	strerror(errno)));
830	rc = RTErrConvertFromErrno(errno);
831	break;
832	}
833
834	if ((size_t)abinfo.bytes > cbBuf)
835	{
836	LogFlowFunc(("Warning: Invalid available size, size=%d, bufsize=%d\n",
837	abinfo.bytes, cbBuf));
838	abinfo.bytes = cbBuf;
839	/* Keep going. */
840	}
841
842	if (!abinfo.bytes < 0)
843	{
844	LogFlowFunc(("Warning: Invalid available size, size=%d, bufsize=%d\n",
845	abinfo.bytes, cbBuf));
846	rc = VERR_INVALID_PARAMETER;
847	break;
848	}
849
850	cToRead = RT_MIN((uint32_t)AUDIOMIXBUF_B2S(&pHstStrmOut->MixBuf, abinfo.bytes),
851	cLive);
852	if (!cToRead)
853	break;
854	#ifndef RT_OS_L4
855	}
856	#endif
857	size_t cbToRead = AUDIOMIXBUF_S2B(&pHstStrmOut->MixBuf, cToRead);
858	LogFlowFunc(("cbToRead=%zu\n", cbToRead));
859
860	uint32_t cRead, cbRead;
861	while (cbToRead)
862	{
863	rc = audioMixBufReadCirc(&pHstStrmOut->MixBuf,
864	pThisStrmOut->pvPCMBuf, cbToRead, &cRead);
865	if (RT_FAILURE(rc))
866	break;
867
868	cbRead = AUDIOMIXBUF_S2B(&pHstStrmOut->MixBuf, cRead);
869	ssize_t cbWritten = write(pThisStrmOut->hFile, pThisStrmOut->pvPCMBuf,
870	cbRead);
871	if (cbWritten == -1)
872	{
873	LogRel(("OSS: Failed writing output data %s\n", strerror(errno)));
874	rc = RTErrConvertFromErrno(errno);
875	break;
876	}
877
878	Assert(cbToRead >= cRead);
879	cbToRead -= cbRead;
880	cbReadTotal += cbRead;
881	}
882
883	#ifndef RT_OS_L4
884	/* Update read pointer. */
885	if (pThisStrmOut->fMemMapped)
886	pThisStrmOut->old_optr = cntinfo.ptr;
887	#endif
888
889	} while(0);
890
891	if (RT_SUCCESS(rc))
892	{
893	uint32_t cReadTotal = AUDIOMIXBUF_B2S(&pHstStrmOut->MixBuf, cbReadTotal);
894	if (cReadTotal)
895	audioMixBufFinish(&pHstStrmOut->MixBuf, cReadTotal);
896
897	if (pcSamplesPlayed)
898	*pcSamplesPlayed = cReadTotal;
899
900	LogFlowFunc(("cReadTotal=%RU32 (%RU32 bytes), rc=%Rrc\n",
901	cReadTotal, cbReadTotal, rc));
902	}
903
904	LogFlowFuncLeaveRC(rc);
905	return rc;
906	}
907
908	/**
909	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
910	*/
911	static DECLCALLBACK(void ) drvHostOSSAudioQueryInterface(PPDMIBASE pInterface, const char pszIID)
912	{
913	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
914	PDRVHOSTOSSAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTOSSAUDIO);
915	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
916	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio);
917
918	return NULL;
919	}
920
921	static DECLCALLBACK(void) drvHostOSSAudioDestruct(PPDMDRVINS pDrvIns)
922	{
923	}
924
925	/**
926	* Constructs an OSS audio driver instance.
927	*
928	* @copydoc FNPDMDRVCONSTRUCT
929	*/
930	static DECLCALLBACK(int) drvHostOSSAudioConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
931	{
932	PDRVHOSTOSSAUDIO pThis = PDMINS_2_DATA(pDrvIns, PDRVHOSTOSSAUDIO);
933	LogRel(("Audio: Initializing OSS driver\n"));
934
935	/*
936	* Init the static parts.
937	*/
938	pThis->pDrvIns = pDrvIns;
939	/* IBase */
940	pDrvIns->IBase.pfnQueryInterface = drvHostOSSAudioQueryInterface;
941	/* IHostAudio */
942	PDMAUDIO_IHOSTAUDIO_CALLBACKS(drvHostOSSAudio);
943
944	return VINF_SUCCESS;
945	}
946
947	/**
948	* Char driver registration record.
949	*/
950	const PDMDRVREG g_DrvHostOSSAudio =
951	{
952	/* u32Version */
953	PDM_DRVREG_VERSION,
954	/* szName */
955	"OSSAudio",
956	/* szRCMod */
957	"",
958	/* szR0Mod */
959	"",
960	/* pszDescription */
961	"OSS audio host driver",
962	/* fFlags */
963	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
964	/* fClass. */
965	PDM_DRVREG_CLASS_AUDIO,
966	/* cMaxInstances */
967	~0U,
968	/* cbInstance */
969	sizeof(DRVHOSTOSSAUDIO),
970	/* pfnConstruct */
971	drvHostOSSAudioConstruct,
972	/* pfnDestruct */
973	drvHostOSSAudioDestruct,
974	/* pfnRelocate */
975	NULL,
976	/* pfnIOCtl */
977	NULL,
978	/* pfnPowerOn */
979	NULL,
980	/* pfnReset */
981	NULL,
982	/* pfnSuspend */
983	NULL,
984	/* pfnResume */
985	NULL,
986	/* pfnAttach */
987	NULL,
988	/* pfnDetach */
989	NULL,
990	/* pfnPowerOff */
991	NULL,
992	/* pfnSoftReset */
993	NULL,
994	/* u32EndVersion */
995	PDM_DRVREG_VERSION
996	};

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source: vbox/trunk/src/VBox/Devices/Audio/DrvHostOSSAudio.cpp@ 54433

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