AudioHlp.cpp@ 105381

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1	/* $Id: AudioHlp.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* Audio helper routines.
4	*
5	* These are used with both drivers and devices.
6	*/
7
8	/*
9	* Copyright (C) 2006-2023 Oracle and/or its affiliates.
10	*
11	* This file is part of VirtualBox base platform packages, as
12	* available from https://www.virtualbox.org.
13	*
14	* This program is free software; you can redistribute it and/or
15	* modify it under the terms of the GNU General Public License
16	* as published by the Free Software Foundation, in version 3 of the
17	* License.
18	*
19	* This program is distributed in the hope that it will be useful, but
20	* WITHOUT ANY WARRANTY; without even the implied warranty of
21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22	* General Public License for more details.
23	*
24	* You should have received a copy of the GNU General Public License
25	* along with this program; if not, see <https://www.gnu.org/licenses>.
26	*
27	* SPDX-License-Identifier: GPL-3.0-only
28	*/
29
30
31	/*********************************************************************************************************************************
32	* Header Files *
33	*********************************************************************************************************************************/
34	#include <iprt/assert.h>
35	#include <iprt/dir.h>
36	#include <iprt/file.h>
37	#include <iprt/mem.h>
38	#include <iprt/string.h>
39	#include <iprt/uuid.h>
40	#include <iprt/formats/riff.h>
41
42	#define LOG_GROUP LOG_GROUP_DRV_AUDIO
43	#include <VBox/log.h>
44
45	#include <VBox/err.h>
46	#include <VBox/vmm/pdmdev.h>
47	#include <VBox/vmm/pdm.h>
48	#include <VBox/vmm/pdmaudioinline.h>
49
50	#include "AudioHlp.h"
51
52
53	/*********************************************************************************************************************************
54	* Structures and Typedefs *
55	*********************************************************************************************************************************/
56	typedef struct AUDIOWAVEFILEHDR
57	{
58	RTRIFFHDR Hdr;
59	RTRIFFWAVEFMTEXTCHUNK FmtExt;
60	RTRIFFCHUNK Data;
61	} AUDIOWAVEFILEHDR;
62
63
64	#if 0 /* unused, no header prototypes */
65
66	/**
67	* Retrieves the matching PDMAUDIOFMT for the given bits + signing flag.
68	*
69	* @return Matching PDMAUDIOFMT value.
70	* @retval PDMAUDIOFMT_INVALID if unsupported @a cBits value.
71	*
72	* @param cBits The number of bits in the audio format.
73	* @param fSigned Whether the audio format is signed @c true or not.
74	*/
75	PDMAUDIOFMT DrvAudioAudFmtBitsToFormat(uint8_t cBits, bool fSigned)
76	{
77	if (fSigned)
78	{
79	switch (cBits)
80	{
81	case 8: return PDMAUDIOFMT_S8;
82	case 16: return PDMAUDIOFMT_S16;
83	case 32: return PDMAUDIOFMT_S32;
84	default: AssertMsgFailedReturn(("Bogus audio bits %RU8\n", cBits), PDMAUDIOFMT_INVALID);
85	}
86	}
87	else
88	{
89	switch (cBits)
90	{
91	case 8: return PDMAUDIOFMT_U8;
92	case 16: return PDMAUDIOFMT_U16;
93	case 32: return PDMAUDIOFMT_U32;
94	default: AssertMsgFailedReturn(("Bogus audio bits %RU8\n", cBits), PDMAUDIOFMT_INVALID);
95	}
96	}
97	}
98
99	/**
100	* Returns an unique file name for this given audio connector instance.
101	*
102	* @return Allocated file name. Must be free'd using RTStrFree().
103	* @param uInstance Driver / device instance.
104	* @param pszPath Path name of the file to delete. The path must exist.
105	* @param pszSuffix File name suffix to use.
106	*/
107	char DrvAudioDbgGetFileNameA(uint8_t uInstance, const char pszPath, const char *pszSuffix)
108	{
109	char szFileName[64];
110	RTStrPrintf(szFileName, sizeof(szFileName), "drvAudio%RU8-%s", uInstance, pszSuffix);
111
112	char szFilePath[RTPATH_MAX];
113	int rc2 = RTStrCopy(szFilePath, sizeof(szFilePath), pszPath);
114	AssertRC(rc2);
115	rc2 = RTPathAppend(szFilePath, sizeof(szFilePath), szFileName);
116	AssertRC(rc2);
117
118	return RTStrDup(szFilePath);
119	}
120
121	#endif /* unused */
122
123	/**
124	* Checks whether a given stream configuration is valid or not.
125	*
126	* @note See notes on AudioHlpPcmPropsAreValid().
127	*
128	* Returns @c true if configuration is valid, @c false if not.
129	* @param pCfg Stream configuration to check.
130	*/
131	bool AudioHlpStreamCfgIsValid(PCPDMAUDIOSTREAMCFG pCfg)
132	{
133	/* Ugly! HDA attach code calls us with uninitialized (all zero) config. */
134	if (PDMAudioPropsHz(&pCfg->Props) != 0)
135	{
136	if (PDMAudioStrmCfgIsValid(pCfg))
137	{
138	if ( pCfg->enmDir == PDMAUDIODIR_IN
139	\|\| pCfg->enmDir == PDMAUDIODIR_OUT)
140	return AudioHlpPcmPropsAreValidAndSupported(&pCfg->Props);
141	}
142	}
143	return false;
144	}
145
146	/**
147	* Calculates the audio bit rate of the given bits per sample, the Hz and the number
148	* of audio channels.
149	*
150	* Divide the result by 8 to get the byte rate.
151	*
152	* @returns Bitrate.
153	* @param cBits Number of bits per sample.
154	* @param uHz Hz (Hertz) rate.
155	* @param cChannels Number of audio channels.
156	*/
157	uint32_t AudioHlpCalcBitrate(uint8_t cBits, uint32_t uHz, uint8_t cChannels)
158	{
159	return cBits * uHz * cChannels;
160	}
161
162
163	/**
164	* Checks whether given PCM properties are valid and supported by the audio stack or not.
165	*
166	* @returns @c true if the properties are valid and supported, @c false if not.
167	* @param pProps The PCM properties to check.
168	*
169	* @note Use PDMAudioPropsAreValid() to just check the validation bits.
170	*/
171	bool AudioHlpPcmPropsAreValidAndSupported(PCPDMAUDIOPCMPROPS pProps)
172	{
173	AssertPtrReturn(pProps, false);
174
175	if (!PDMAudioPropsAreValid(pProps))
176	return false;
177
178	/* Properties seem valid, now check if we actually support those. */
179	switch (PDMAudioPropsSampleSize(pProps))
180	{
181	case 1: /* 8 bit */
182	/* Signed / unsigned. */
183	break;
184	case 2: /* 16 bit */
185	/* Signed / unsigned. */
186	break;
187	/** @todo Do we need support for 24 bit samples? */
188	case 4: /* 32 bit */
189	/* Signed / unsigned. */
190	break;
191	case 8: /* 64-bit raw */
192	if ( !PDMAudioPropsIsSigned(pProps)
193	\|\| !pProps->fRaw)
194	return false;
195	break;
196	default:
197	return false;
198	}
199
200	if (!pProps->fSwapEndian) /** @todo Handling Big Endian audio data is not supported yet. */
201	return true;
202	return false;
203	}
204
205
206	/*********************************************************************************************************************************
207	* Audio File Helpers *
208	*********************************************************************************************************************************/
209
210	/**
211	* Constructs an unique file name, based on the given path and the audio file type.
212	*
213	* @returns VBox status code.
214	* @param pszDst Where to store the constructed file name.
215	* @param cbDst Size of the destination buffer (bytes; incl terminator).
216	* @param pszPath Base path to use. If NULL or empty, the user's
217	* temporary directory will be used.
218	* @param pszNameFmt A name for better identifying the file.
219	* @param va Arguments for @a pszNameFmt.
220	* @param uInstance Device / driver instance which is using this file.
221	* @param enmType Audio file type to construct file name for.
222	* @param fFlags File naming flags, AUDIOHLPFILENAME_FLAGS_XXX.
223	* @param chTweak Retry tweak character.
224	*/
225	static int audioHlpConstructPathWorker(char pszDst, size_t cbDst, const char pszPath, const char *pszNameFmt, va_list va,
226	uint32_t uInstance, AUDIOHLPFILETYPE enmType, uint32_t fFlags, char chTweak)
227	{
228	/*
229	* Validate input.
230	*/
231	AssertPtrNullReturn(pszPath, VERR_INVALID_POINTER);
232	AssertPtrReturn(pszNameFmt, VERR_INVALID_POINTER);
233	AssertReturn(!(fFlags & ~AUDIOHLPFILENAME_FLAGS_VALID_MASK), VERR_INVALID_FLAGS);
234
235	/* Validate the type and translate it into a suffix. */
236	const char *pszSuffix = NULL;
237	switch (enmType)
238	{
239	case AUDIOHLPFILETYPE_RAW: pszSuffix = ".pcm"; break;
240	case AUDIOHLPFILETYPE_WAV: pszSuffix = ".wav"; break;
241	case AUDIOHLPFILETYPE_INVALID:
242	case AUDIOHLPFILETYPE_32BIT_HACK:
243	break; /* no default */
244	}
245	AssertMsgReturn(pszSuffix, ("enmType=%d\n", enmType), VERR_INVALID_PARAMETER);
246
247	/*
248	* The directory. Make sure it exists and ends with a path separator.
249	*/
250	int rc;
251	if (!pszPath \|\| !*pszPath)
252	rc = RTPathTemp(pszDst, cbDst);
253	else
254	{
255	AssertPtrReturn(pszDst, VERR_INVALID_POINTER);
256	rc = RTStrCopy(pszDst, cbDst, pszPath);
257	}
258	AssertRCReturn(rc, rc);
259
260	if (!RTDirExists(pszDst))
261	{
262	rc = RTDirCreateFullPath(pszDst, RTFS_UNIX_IRWXU);
263	AssertRCReturn(rc, rc);
264	}
265
266	size_t offDst = RTPathEnsureTrailingSeparator(pszDst, cbDst);
267	AssertReturn(offDst > 0, VERR_BUFFER_OVERFLOW);
268	Assert(offDst < cbDst);
269
270	/*
271	* The filename.
272	*/
273	/* Start with a ISO timestamp w/ colons replaced by dashes if requested. */
274	if (fFlags & AUDIOHLPFILENAME_FLAGS_TS)
275	{
276	RTTIMESPEC NowTimeSpec;
277	RTTIME NowUtc;
278	AssertReturn(RTTimeToString(RTTimeExplode(&NowUtc, RTTimeNow(&NowTimeSpec)), &pszDst[offDst], cbDst - offDst),
279	VERR_BUFFER_OVERFLOW);
280
281	/* Change the two colons in the time part to dashes. */
282	char *pchColon = &pszDst[offDst];
283	while ((pchColon = strchr(pchColon, ':')) != NULL)
284	*pchColon++ = '-';
285
286	offDst += strlen(&pszDst[offDst]);
287	Assert(pszDst[offDst - 1] == 'Z');
288
289	/* Append a dash to separate the timestamp from the name. */
290	AssertReturn(offDst + 2 <= cbDst, VERR_BUFFER_OVERFLOW);
291	pszDst[offDst++] = '-';
292	pszDst[offDst] = '\0';
293	}
294
295	/* Append the filename, instance, retry-tweak and suffix. */
296	va_list vaCopy;
297	va_copy(vaCopy, va);
298	ssize_t cchTail;
299	if (chTweak == '\0')
300	cchTail = RTStrPrintf2(&pszDst[offDst], cbDst - offDst, "%N-%u%s", pszNameFmt, &vaCopy, uInstance, pszSuffix);
301	else
302	cchTail = RTStrPrintf2(&pszDst[offDst], cbDst - offDst, "%N-%u%c%s", pszNameFmt, &vaCopy, uInstance, chTweak, pszSuffix);
303	va_end(vaCopy);
304	AssertReturn(cchTail > 0, VERR_BUFFER_OVERFLOW);
305
306	return VINF_SUCCESS;
307	}
308
309
310	/**
311	* Worker for AudioHlpFileCreateF and AudioHlpFileCreateAndOpenEx that allocates
312	* and initializes a AUDIOHLPFILE instance.
313	*/
314	static int audioHlpFileCreateWorker(PAUDIOHLPFILE ppFile, uint32_t fFlags, AUDIOHLPFILETYPE enmType, const char pszPath)
315	{
316	AssertReturn(!(fFlags & ~AUDIOHLPFILE_FLAGS_VALID_MASK), VERR_INVALID_FLAGS);
317
318	size_t const cbPath = strlen(pszPath) + 1;
319	PAUDIOHLPFILE pFile = (PAUDIOHLPFILE)RTMemAllocVar(RT_UOFFSETOF_DYN(AUDIOHLPFILE, szName[cbPath]));
320	AssertPtrReturn(pFile, VERR_NO_MEMORY);
321
322	pFile->enmType = enmType;
323	pFile->fFlags = fFlags;
324	pFile->cbWaveData = 0;
325	pFile->hFile = NIL_RTFILE;
326	memcpy(pFile->szName, pszPath, cbPath);
327
328	*ppFile = pFile;
329	return VINF_SUCCESS;
330	}
331
332
333	/**
334	* Creates an instance of AUDIOHLPFILE with the given filename and type.
335	*
336	* @note This does <b>NOT</b> create the file, see AudioHlpFileOpen for that.
337	*
338	* @returns VBox status code.
339	* @param ppFile Where to return the pointer to the audio debug file
340	* instance on success.
341	* @param fFlags AUDIOHLPFILE_FLAGS_XXX.
342	* @param enmType The audio file type to produce.
343	* @param pszPath The directory path. The temporary directory will be
344	* used if NULL or empty.
345	* @param fFilename AUDIOHLPFILENAME_FLAGS_XXX.
346	* @param uInstance The instance number (will be appended to the filename
347	* with a dash inbetween).
348	* @param pszNameFmt The filename format string.
349	* @param ... Arguments to the filename format string.
350	*/
351	int AudioHlpFileCreateF(PAUDIOHLPFILE *ppFile, uint32_t fFlags, AUDIOHLPFILETYPE enmType,
352	const char pszPath, uint32_t fFilename, uint32_t uInstance, const char pszNameFmt, ...)
353	{
354	*ppFile = NULL;
355
356	/*
357	* Construct the filename first.
358	*/
359	char szPath[RTPATH_MAX];
360	va_list va;
361	va_start(va, pszNameFmt);
362	int rc = audioHlpConstructPathWorker(szPath, sizeof(szPath), pszPath, pszNameFmt, va, uInstance, enmType, fFilename, '\0');
363	va_end(va);
364	AssertRCReturn(rc, rc);
365
366	/*
367	* Allocate and initializes a debug file instance with that filename path.
368	*/
369	return audioHlpFileCreateWorker(ppFile, fFlags, enmType, szPath);
370	}
371
372
373	/**
374	* Destroys a formerly created audio file.
375	*
376	* @param pFile Audio file (object) to destroy.
377	*/
378	void AudioHlpFileDestroy(PAUDIOHLPFILE pFile)
379	{
380	if (pFile)
381	{
382	AudioHlpFileClose(pFile);
383	RTMemFree(pFile);
384	}
385	}
386
387
388	/**
389	* Opens or creates an audio file.
390	*
391	* @returns VBox status code.
392	* @param pFile Pointer to audio file handle to use.
393	* @param fOpen Open flags.
394	* Use AUDIOHLPFILE_DEFAULT_OPEN_FLAGS for the default open flags.
395	* @param pProps PCM properties to use.
396	*/
397	int AudioHlpFileOpen(PAUDIOHLPFILE pFile, uint64_t fOpen, PCPDMAUDIOPCMPROPS pProps)
398	{
399	int rc;
400
401	AssertPtrReturn(pFile, VERR_INVALID_POINTER);
402	/** @todo Validate fOpen flags. */
403	AssertPtrReturn(pProps, VERR_INVALID_POINTER);
404	Assert(PDMAudioPropsAreValid(pProps));
405
406	/*
407	* Raw files just needs to be opened.
408	*/
409	if (pFile->enmType == AUDIOHLPFILETYPE_RAW)
410	rc = RTFileOpen(&pFile->hFile, pFile->szName, fOpen);
411	/*
412	* Wave files needs a header to be constructed and we need to take note of where
413	* there are sizes to update later when closing the file.
414	*/
415	else if (pFile->enmType == AUDIOHLPFILETYPE_WAV)
416	{
417	/* Construct the header. */
418	AUDIOWAVEFILEHDR FileHdr;
419	FileHdr.Hdr.uMagic = RTRIFFHDR_MAGIC;
420	FileHdr.Hdr.cbFile = 0; /* need to update this later */
421	FileHdr.Hdr.uFileType = RTRIFF_FILE_TYPE_WAVE;
422	FileHdr.FmtExt.Chunk.uMagic = RTRIFFWAVEFMT_MAGIC;
423	FileHdr.FmtExt.Chunk.cbChunk = sizeof(RTRIFFWAVEFMTEXTCHUNK) - sizeof(RTRIFFCHUNK);
424	FileHdr.FmtExt.Data.Core.uFormatTag = RTRIFFWAVEFMT_TAG_EXTENSIBLE;
425	FileHdr.FmtExt.Data.Core.cChannels = PDMAudioPropsChannels(pProps);
426	FileHdr.FmtExt.Data.Core.uHz = PDMAudioPropsHz(pProps);
427	FileHdr.FmtExt.Data.Core.cbRate = PDMAudioPropsFramesToBytes(pProps, PDMAudioPropsHz(pProps));
428	FileHdr.FmtExt.Data.Core.cbFrame = PDMAudioPropsFrameSize(pProps);
429	FileHdr.FmtExt.Data.Core.cBitsPerSample = PDMAudioPropsSampleBits(pProps);
430	FileHdr.FmtExt.Data.cbExtra = sizeof(FileHdr.FmtExt.Data) - sizeof(FileHdr.FmtExt.Data.Core);
431	FileHdr.FmtExt.Data.cValidBitsPerSample = PDMAudioPropsSampleBits(pProps);
432	FileHdr.FmtExt.Data.fChannelMask = 0;
433	for (uintptr_t idxCh = 0; idxCh < FileHdr.FmtExt.Data.Core.cChannels; idxCh++)
434	{
435	PDMAUDIOCHANNELID const idCh = (PDMAUDIOCHANNELID)pProps->aidChannels[idxCh];
436	AssertLogRelMsgReturn(idCh >= PDMAUDIOCHANNELID_FIRST_STANDARD && idCh < PDMAUDIOCHANNELID_END_STANDARD,
437	("Invalid channel ID %d for channel #%u", idCh, idxCh), VERR_INVALID_PARAMETER);
438	AssertLogRelMsgReturn(!(FileHdr.FmtExt.Data.fChannelMask & RT_BIT_32(idCh - PDMAUDIOCHANNELID_FIRST_STANDARD)),
439	("Channel #%u repeats channel ID %d", idxCh, idCh), VERR_INVALID_PARAMETER);
440	FileHdr.FmtExt.Data.fChannelMask \|= RT_BIT_32(idCh - PDMAUDIOCHANNELID_FIRST_STANDARD);
441	}
442
443	RTUUID UuidTmp;
444	rc = RTUuidFromStr(&UuidTmp, RTRIFFWAVEFMTEXT_SUBTYPE_PCM);
445	AssertRCReturn(rc, rc);
446	FileHdr.FmtExt.Data.SubFormat = UuidTmp; /* (64-bit field maybe unaligned) */
447
448	FileHdr.Data.uMagic = RTRIFFWAVEDATACHUNK_MAGIC;
449	FileHdr.Data.cbChunk = 0; /* need to update this later */
450
451	/* Open the file and write out the header. */
452	rc = RTFileOpen(&pFile->hFile, pFile->szName, fOpen);
453	if (RT_SUCCESS(rc))
454	{
455	rc = RTFileWrite(pFile->hFile, &FileHdr, sizeof(FileHdr), NULL);
456	if (RT_FAILURE(rc))
457	{
458	RTFileClose(pFile->hFile);
459	pFile->hFile = NIL_RTFILE;
460	}
461	}
462	}
463	else
464	AssertFailedStmt(rc = VERR_INTERNAL_ERROR_3);
465	if (RT_SUCCESS(rc))
466	{
467	pFile->cbWaveData = 0;
468	LogRel2(("Audio: Opened file '%s'\n", pFile->szName));
469	}
470	else
471	LogRel(("Audio: Failed opening file '%s': %Rrc\n", pFile->szName, rc));
472	return rc;
473	}
474
475
476	/**
477	* Creates a debug file structure and opens a file for it, extended version.
478	*
479	* @returns VBox status code.
480	* @param ppFile Where to return the debug file instance on success.
481	* @param enmType The file type.
482	* @param pszDir The directory to open the file in.
483	* @param iInstance The device/driver instance.
484	* @param fFilename AUDIOHLPFILENAME_FLAGS_XXX.
485	* @param fCreate AUDIOHLPFILE_FLAGS_XXX.
486	* @param pProps PCM audio properties for the file.
487	* @param fOpen RTFILE_O_XXX or AUDIOHLPFILE_DEFAULT_OPEN_FLAGS.
488	* @param pszNameFmt The base filename.
489	* @param ... Filename format arguments.
490	*/
491	int AudioHlpFileCreateAndOpenEx(PAUDIOHLPFILE ppFile, AUDIOHLPFILETYPE enmType, const char pszDir,
492	uint32_t iInstance, uint32_t fFilename, uint32_t fCreate,
493	PCPDMAUDIOPCMPROPS pProps, uint64_t fOpen, const char *pszNameFmt, ...)
494	{
495	*ppFile = NULL;
496
497	for (uint32_t iTry = 0; ; iTry++)
498	{
499	/* Format the path to the filename. */
500	char szFile[RTPATH_MAX];
501	va_list va;
502	va_start(va, pszNameFmt);
503	int rc = audioHlpConstructPathWorker(szFile, sizeof(szFile), pszDir, pszNameFmt, va, iInstance, enmType, fFilename,
504	iTry == 0 ? '\0' : iTry + 'a');
505	va_end(va);
506	AssertRCReturn(rc, rc);
507
508	/* Create an debug audio file instance with the filename path. */
509	PAUDIOHLPFILE pFile = NULL;
510	rc = audioHlpFileCreateWorker(&pFile, fCreate, enmType, szFile);
511	AssertRCReturn(rc, rc);
512
513	/* Try open it. */
514	rc = AudioHlpFileOpen(pFile, fOpen, pProps);
515	if (RT_SUCCESS(rc))
516	{
517	*ppFile = pFile;
518	return rc;
519	}
520	AudioHlpFileDestroy(pFile);
521
522	AssertReturn(iTry < 16, rc);
523	}
524	}
525
526
527	/**
528	* Creates a debug wav-file structure and opens a file for it, default flags.
529	*
530	* @returns VBox status code.
531	* @param ppFile Where to return the debug file instance on success.
532	* @param pszDir The directory to open the file in.
533	* @param pszName The base filename.
534	* @param iInstance The device/driver instance.
535	* @param pProps PCM audio properties for the file.
536	*/
537	int AudioHlpFileCreateAndOpen(PAUDIOHLPFILE ppFile, const char pszDir, const char *pszName,
538	uint32_t iInstance, PCPDMAUDIOPCMPROPS pProps)
539	{
540	return AudioHlpFileCreateAndOpenEx(ppFile, AUDIOHLPFILETYPE_WAV, pszDir, iInstance,
541	AUDIOHLPFILENAME_FLAGS_NONE, AUDIOHLPFILE_FLAGS_NONE,
542	pProps, AUDIOHLPFILE_DEFAULT_OPEN_FLAGS, "%s", pszName);
543	}
544
545
546	/**
547	* Closes an audio file.
548	*
549	* @returns VBox status code.
550	* @param pFile Audio file handle to close.
551	*/
552	int AudioHlpFileClose(PAUDIOHLPFILE pFile)
553	{
554	if (!pFile \|\| pFile->hFile == NIL_RTFILE)
555	return VINF_SUCCESS;
556
557	/*
558	* Wave files needs to update the data size and file size in the header.
559	*/
560	if (pFile->enmType == AUDIOHLPFILETYPE_WAV)
561	{
562	uint32_t const cbFile = sizeof(AUDIOWAVEFILEHDR) - sizeof(RTRIFFCHUNK) + (uint32_t)pFile->cbWaveData;
563	uint32_t const cbData = (uint32_t)pFile->cbWaveData;
564
565	int rc2;
566	rc2 = RTFileWriteAt(pFile->hFile, RT_UOFFSETOF(AUDIOWAVEFILEHDR, Hdr.cbFile), &cbFile, sizeof(cbFile), NULL);
567	AssertRC(rc2);
568	rc2 = RTFileWriteAt(pFile->hFile, RT_UOFFSETOF(AUDIOWAVEFILEHDR, Data.cbChunk), &cbData, sizeof(cbData), NULL);
569	AssertRC(rc2);
570	}
571
572	/*
573	* Do the closing.
574	*/
575	int rc = RTFileClose(pFile->hFile);
576	if (RT_SUCCESS(rc) \|\| rc == VERR_INVALID_HANDLE)
577	pFile->hFile = NIL_RTFILE;
578
579	if (RT_SUCCESS(rc))
580	LogRel2(("Audio: Closed file '%s' (%'RU64 bytes PCM data)\n", pFile->szName, pFile->cbWaveData));
581	else
582	LogRel(("Audio: Failed closing file '%s': %Rrc\n", pFile->szName, rc));
583
584	/*
585	* Delete empty file if requested.
586	*/
587	if ( !(pFile->fFlags & AUDIOHLPFILE_FLAGS_KEEP_IF_EMPTY)
588	&& pFile->cbWaveData == 0
589	&& RT_SUCCESS(rc))
590	AudioHlpFileDelete(pFile);
591
592	return rc;
593	}
594
595
596	/**
597	* Deletes an audio file.
598	*
599	* @returns VBox status code.
600	* @param pFile Audio file to delete.
601	*/
602	int AudioHlpFileDelete(PAUDIOHLPFILE pFile)
603	{
604	AssertPtrReturn(pFile, VERR_INVALID_POINTER);
605
606	int rc = RTFileDelete(pFile->szName);
607	if (RT_SUCCESS(rc))
608	LogRel2(("Audio: Deleted file '%s'\n", pFile->szName));
609	else if (rc == VERR_FILE_NOT_FOUND) /* Don't bitch if the file is not around anymore. */
610	rc = VINF_SUCCESS;
611
612	if (RT_FAILURE(rc))
613	LogRel(("Audio: Failed deleting file '%s', rc=%Rrc\n", pFile->szName, rc));
614
615	return rc;
616	}
617
618
619	/**
620	* Returns whether the given audio file is open and in use or not.
621	*
622	* @returns True if open, false if not.
623	* @param pFile Audio file to check open status for.
624	*/
625	bool AudioHlpFileIsOpen(PAUDIOHLPFILE pFile)
626	{
627	if (!pFile \|\| pFile->hFile == NIL_RTFILE)
628	return false;
629
630	return RTFileIsValid(pFile->hFile);
631	}
632
633
634	/**
635	* Write PCM data to a wave (.WAV) file.
636	*
637	* @returns VBox status code.
638	* @param pFile Audio file to write PCM data to.
639	* @param pvBuf Audio data to write.
640	* @param cbBuf Size (in bytes) of audio data to write.
641	*/
642	int AudioHlpFileWrite(PAUDIOHLPFILE pFile, const void *pvBuf, size_t cbBuf)
643	{
644	AssertPtrReturn(pFile, VERR_INVALID_POINTER);
645	AssertPtrReturn(pvBuf, VERR_INVALID_POINTER);
646
647	if (!cbBuf)
648	return VINF_SUCCESS;
649
650	int rc = RTFileWrite(pFile->hFile, pvBuf, cbBuf, NULL);
651	if (RT_SUCCESS(rc))
652	pFile->cbWaveData += cbBuf;
653
654	return rc;
655	}
656

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source: vbox/trunk/src/VBox/Devices/Audio/AudioHlp.cpp@ 105381

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