/* $Id: DrvHostAudioOss.cpp 89551 2021-06-08 01:25:04Z vboxsync $ */ /** @file * Host audio driver - OSS (Open Sound System). */ /* * Copyright (C) 2014-2020 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_ENABLED 1 #include #include #include #include #include #include #include #include #include /* For PDMIBASE_2_PDMDRV. */ #define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO #include #include #include #include "VBoxDD.h" /********************************************************************************************************************************* * Defines * *********************************************************************************************************************************/ #if ((SOUND_VERSION > 360) && (defined(OSS_SYSINFO))) /* OSS > 3.6 has a new syscall available for querying a bit more detailed information * about OSS' audio capabilities. This is handy for e.g. Solaris. */ # define VBOX_WITH_AUDIO_OSS_SYSINFO 1 #endif /********************************************************************************************************************************* * Structures * *********************************************************************************************************************************/ /** * OSS audio stream configuration. */ typedef struct DRVHSTAUDOSSSTREAMCFG { PDMAUDIOPCMPROPS Props; uint16_t cFragments; /** The log2 of cbFragment. */ uint16_t cbFragmentLog2; uint32_t cbFragment; } DRVHSTAUDOSSSTREAMCFG; /** Pointer to an OSS audio stream configuration. */ typedef DRVHSTAUDOSSSTREAMCFG *PDRVHSTAUDOSSSTREAMCFG; /** * OSS audio stream. */ typedef struct DRVHSTAUDOSSSTREAM { /** Common part. */ PDMAUDIOBACKENDSTREAM Core; /** The file descriptor. */ int hFile; /** Buffer alignment. */ uint8_t uAlign; /** Set if we're draining the stream (output only). */ bool fDraining; /** Internal stream byte offset. */ uint64_t offInternal; /** The stream's acquired configuration. */ PDMAUDIOSTREAMCFG Cfg; /** The acquired OSS configuration. */ DRVHSTAUDOSSSTREAMCFG OssCfg; /** Handle to the thread draining output streams. */ RTTHREAD hThreadDrain; } DRVHSTAUDOSSSTREAM; /** Pointer to an OSS audio stream. */ typedef DRVHSTAUDOSSSTREAM *PDRVHSTAUDOSSSTREAM; /** * OSS host audio driver instance data. * @implements PDMIAUDIOCONNECTOR */ typedef struct DRVHSTAUDOSS { /** Pointer to the driver instance structure. */ PPDMDRVINS pDrvIns; /** Pointer to host audio interface. */ PDMIHOSTAUDIO IHostAudio; /** Error count for not flooding the release log. * UINT32_MAX for unlimited logging. */ uint32_t cLogErrors; } DRVHSTAUDOSS; /** Pointer to the instance data for an OSS host audio driver. */ typedef DRVHSTAUDOSS *PDRVHSTAUDOSS; /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** The path to the output OSS device. */ static char g_szPathOutputDev[] = "/dev/dsp"; /** The path to the input OSS device. */ static char g_szPathInputDev[] = "/dev/dsp"; static int drvHstAudOssToPdmAudioProps(PPDMAUDIOPCMPROPS pProps, int fmt, int cChannels, int uHz) { switch (fmt) { case AFMT_S8: PDMAudioPropsInit(pProps, 1 /*8-bit*/, true /*signed*/, cChannels, uHz); break; case AFMT_U8: PDMAudioPropsInit(pProps, 1 /*8-bit*/, false /*signed*/, cChannels, uHz); break; case AFMT_S16_LE: PDMAudioPropsInitEx(pProps, 2 /*16-bit*/, true /*signed*/, cChannels, uHz, true /*fLittleEndian*/, false /*fRaw*/); break; case AFMT_U16_LE: PDMAudioPropsInitEx(pProps, 2 /*16-bit*/, false /*signed*/, cChannels, uHz, true /*fLittleEndian*/, false /*fRaw*/); break; case AFMT_S16_BE: PDMAudioPropsInitEx(pProps, 2 /*16-bit*/, true /*signed*/, cChannels, uHz, false /*fLittleEndian*/, false /*fRaw*/); break; case AFMT_U16_BE: PDMAudioPropsInitEx(pProps, 2 /*16-bit*/, false /*signed*/, cChannels, uHz, false /*fLittleEndian*/, false /*fRaw*/); break; default: AssertMsgFailedReturn(("Format %d not supported\n", fmt), VERR_NOT_SUPPORTED); } return VINF_SUCCESS; } static int drvHstAudOssStreamClose(int *phFile) { if (!phFile || !*phFile || *phFile == -1) return VINF_SUCCESS; int rc; if (close(*phFile)) { rc = RTErrConvertFromErrno(errno); LogRel(("OSS: Closing stream failed: %s / %Rrc\n", strerror(errno), rc)); } else { *phFile = -1; rc = VINF_SUCCESS; } return rc; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnGetConfig} */ static DECLCALLBACK(int) drvHstAudOssHA_GetConfig(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDCFG pBackendCfg) { RT_NOREF(pInterface); /* * Fill in the config structure. */ RTStrCopy(pBackendCfg->szName, sizeof(pBackendCfg->szName), "OSS"); pBackendCfg->cbStream = sizeof(DRVHSTAUDOSSSTREAM); pBackendCfg->fFlags = 0; pBackendCfg->cMaxStreamsIn = 0; pBackendCfg->cMaxStreamsOut = 0; int hFile = open("/dev/dsp", O_WRONLY | O_NONBLOCK, 0); if (hFile == -1) { /* Try opening the mixing device instead. */ hFile = open("/dev/mixer", O_RDONLY | O_NONBLOCK, 0); } if (hFile != -1) { int ossVer = -1; int err = ioctl(hFile, OSS_GETVERSION, &ossVer); if (err == 0) { LogRel2(("OSS: Using version: %d\n", ossVer)); #ifdef VBOX_WITH_AUDIO_OSS_SYSINFO oss_sysinfo ossInfo; RT_ZERO(ossInfo); err = ioctl(hFile, OSS_SYSINFO, &ossInfo); if (err == 0) { LogRel2(("OSS: Number of DSPs: %d\n", ossInfo.numaudios)); LogRel2(("OSS: Number of mixers: %d\n", ossInfo.nummixers)); int cDev = ossInfo.nummixers; if (!cDev) cDev = ossInfo.numaudios; pBackendCfg->cMaxStreamsIn = UINT32_MAX; pBackendCfg->cMaxStreamsOut = UINT32_MAX; } else #endif { /* Since we cannot query anything, assume that we have at least * one input and one output if we found "/dev/dsp" or "/dev/mixer". */ pBackendCfg->cMaxStreamsIn = UINT32_MAX; pBackendCfg->cMaxStreamsOut = UINT32_MAX; } } else LogRel(("OSS: Unable to determine installed version: %s (%d)\n", strerror(err), err)); close(hFile); } else LogRel(("OSS: No devices found, audio is not available\n")); return VINF_SUCCESS; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnGetStatus} */ static DECLCALLBACK(PDMAUDIOBACKENDSTS) drvHstAudOssHA_GetStatus(PPDMIHOSTAUDIO pInterface, PDMAUDIODIR enmDir) { AssertPtrReturn(pInterface, PDMAUDIOBACKENDSTS_UNKNOWN); RT_NOREF(enmDir); return PDMAUDIOBACKENDSTS_RUNNING; } static int drvHstAudOssStreamConfigure(int hFile, bool fInput, PDRVHSTAUDOSSSTREAMCFG pOSSReq, PDRVHSTAUDOSSSTREAMCFG pOSSAcq) { /* * Format. */ int iFormat; switch (PDMAudioPropsSampleSize(&pOSSReq->Props)) { case 1: iFormat = pOSSReq->Props.fSigned ? AFMT_S8 : AFMT_U8; break; case 2: if (PDMAudioPropsIsLittleEndian(&pOSSReq->Props)) iFormat = pOSSReq->Props.fSigned ? AFMT_S16_LE : AFMT_U16_LE; else iFormat = pOSSReq->Props.fSigned ? AFMT_S16_BE : AFMT_U16_BE; break; default: LogRel2(("OSS: Unsupported sample size: %u\n", PDMAudioPropsSampleSize(&pOSSReq->Props))); return VERR_AUDIO_STREAM_COULD_NOT_CREATE; } AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_SAMPLESIZE, &iFormat) >= 0, ("OSS: Failed to set audio format to %d: %s (%d)\n", iFormat, strerror(errno), errno), RTErrConvertFromErrno(errno)); /* * Channel count. */ int cChannels = PDMAudioPropsChannels(&pOSSReq->Props); AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_CHANNELS, &cChannels) >= 0, ("OSS: Failed to set number of audio channels (%RU8): %s (%d)\n", PDMAudioPropsChannels(&pOSSReq->Props), strerror(errno), errno), RTErrConvertFromErrno(errno)); /* * Frequency. */ int iFrequenc = pOSSReq->Props.uHz; AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_SPEED, &iFrequenc) >= 0, ("OSS: Failed to set audio frequency to %d Hz: %s (%d)\n", pOSSReq->Props.uHz, strerror(errno), errno), RTErrConvertFromErrno(errno)); /* * Set fragment size and count. */ LogRel2(("OSS: Requested %RU16 %s fragments, %RU32 bytes each\n", pOSSReq->cFragments, fInput ? "input" : "output", pOSSReq->cbFragment)); int mmmmssss = (pOSSReq->cFragments << 16) | pOSSReq->cbFragmentLog2; AssertLogRelMsgReturn(ioctl(hFile, SNDCTL_DSP_SETFRAGMENT, &mmmmssss) >= 0, ("OSS: Failed to set %RU16 fragments to %RU32 bytes each: %s (%d)\n", pOSSReq->cFragments, pOSSReq->cbFragment, strerror(errno), errno), RTErrConvertFromErrno(errno)); /* * Get parameters and popuplate pOSSAcq. */ audio_buf_info BufInfo = { 0, 0, 0, 0 }; AssertLogRelMsgReturn(ioctl(hFile, fInput ? SNDCTL_DSP_GETISPACE : SNDCTL_DSP_GETOSPACE, &BufInfo) >= 0, ("OSS: Failed to retrieve %s buffer length: %s (%d)\n", fInput ? "input" : "output", strerror(errno), errno), RTErrConvertFromErrno(errno)); int rc = drvHstAudOssToPdmAudioProps(&pOSSAcq->Props, iFormat, cChannels, iFrequenc); if (RT_SUCCESS(rc)) { pOSSAcq->cFragments = BufInfo.fragstotal; pOSSAcq->cbFragment = BufInfo.fragsize; pOSSAcq->cbFragmentLog2 = ASMBitFirstSetU32(BufInfo.fragsize) - 1; Assert(RT_BIT_32(pOSSAcq->cbFragmentLog2) == pOSSAcq->cbFragment); LogRel2(("OSS: Got %RU16 %s fragments, %RU32 bytes each\n", pOSSAcq->cFragments, fInput ? "input" : "output", pOSSAcq->cbFragment)); } return rc; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCreate} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamCreate(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream, PCPDMAUDIOSTREAMCFG pCfgReq, PPDMAUDIOSTREAMCFG pCfgAcq) { AssertPtr(pInterface); RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER); AssertPtrReturn(pCfgReq, VERR_INVALID_POINTER); AssertPtrReturn(pCfgAcq, VERR_INVALID_POINTER); pStreamOSS->hThreadDrain = NIL_RTTHREAD; /* * Open the device */ int rc; if (pCfgReq->enmDir == PDMAUDIODIR_IN) pStreamOSS->hFile = open(g_szPathInputDev, O_RDONLY); else pStreamOSS->hFile = open(g_szPathOutputDev, O_WRONLY); if (pStreamOSS->hFile >= 0) { /* * Configure it. * * Note! We limit the output channels to mono or stereo for now just * to keep things simple and avoid wasting time here. If the * channel count isn't a power of two, our code below trips up * on the fragment size. We'd also need to try report/get * channel mappings and whatnot. */ DRVHSTAUDOSSSTREAMCFG ReqOssCfg; RT_ZERO(ReqOssCfg); memcpy(&ReqOssCfg.Props, &pCfgReq->Props, sizeof(PDMAUDIOPCMPROPS)); if (PDMAudioPropsChannels(&ReqOssCfg.Props) > 2) { LogRel2(("OSS: Limiting output to two channels, requested %u.\n", PDMAudioPropsChannels(&ReqOssCfg.Props) )); PDMAudioPropsSetChannels(&ReqOssCfg.Props, 2); } ReqOssCfg.cbFragmentLog2 = 12; ReqOssCfg.cbFragment = RT_BIT_32(ReqOssCfg.cbFragmentLog2); uint32_t const cbBuffer = PDMAudioPropsFramesToBytes(&ReqOssCfg.Props, pCfgReq->Backend.cFramesBufferSize); ReqOssCfg.cFragments = cbBuffer >> ReqOssCfg.cbFragmentLog2; AssertLogRelStmt(cbBuffer < ((uint32_t)0x7ffe << ReqOssCfg.cbFragmentLog2), ReqOssCfg.cFragments = 0x7ffe); rc = drvHstAudOssStreamConfigure(pStreamOSS->hFile, pCfgReq->enmDir == PDMAUDIODIR_IN, &ReqOssCfg, &pStreamOSS->OssCfg); if (RT_SUCCESS(rc)) { pStreamOSS->uAlign = 0; /** @todo r=bird: Where did the correct assignment of this go? */ /* * Complete the stream structure and fill in the pCfgAcq bits. */ if ((pStreamOSS->OssCfg.cFragments * pStreamOSS->OssCfg.cbFragment) & pStreamOSS->uAlign) LogRel(("OSS: Warning: Misaligned playback buffer: Size = %zu, Alignment = %u\n", pStreamOSS->OssCfg.cFragments * pStreamOSS->OssCfg.cbFragment, pStreamOSS->uAlign + 1)); memcpy(&pCfgAcq->Props, &pStreamOSS->OssCfg.Props, sizeof(PDMAUDIOPCMPROPS)); pCfgAcq->Backend.cFramesPeriod = PDMAudioPropsBytesToFrames(&pCfgAcq->Props, pStreamOSS->OssCfg.cbFragment); pCfgAcq->Backend.cFramesBufferSize = pCfgAcq->Backend.cFramesPeriod * pStreamOSS->OssCfg.cFragments; pCfgAcq->Backend.cFramesPreBuffering = (uint64_t)pCfgReq->Backend.cFramesPreBuffering * pCfgAcq->Backend.cFramesBufferSize / RT_MAX(pCfgReq->Backend.cFramesBufferSize, 1); /* * Copy the stream config and we're done! */ PDMAudioStrmCfgCopy(&pStreamOSS->Cfg, pCfgAcq); return VINF_SUCCESS; } drvHstAudOssStreamClose(&pStreamOSS->hFile); } else { rc = RTErrConvertFromErrno(errno); LogRel(("OSS: Failed to open '%s': %s (%d) / %Rrc\n", pCfgReq->enmDir == PDMAUDIODIR_IN ? g_szPathInputDev : g_szPathOutputDev, strerror(errno), errno, rc)); } return rc; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDestroy} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamDestroy(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream, bool fImmediate) { RT_NOREF(pInterface, fImmediate); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER); drvHstAudOssStreamClose(&pStreamOSS->hFile); if (pStreamOSS->hThreadDrain != NIL_RTTHREAD) { int rc = RTThreadWait(pStreamOSS->hThreadDrain, 1, NULL); AssertRC(rc); pStreamOSS->hThreadDrain = NIL_RTTHREAD; } return VINF_SUCCESS; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamEnable} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamEnable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; int rc; /* * This is most probably untested... */ if (pStreamOSS->fDraining) { LogFlowFunc(("Still draining...\n")); rc = RTThreadWait(pStreamOSS->hThreadDrain, 0 /*ms*/, NULL); if (RT_FAILURE(rc)) { LogFlowFunc(("Resetting...\n")); ioctl(pStreamOSS->hFile, SNDCTL_DSP_RESET, NULL); rc = RTThreadWait(pStreamOSS->hThreadDrain, 0 /*ms*/, NULL); if (RT_FAILURE(rc)) { LogFlowFunc(("Poking...\n")); RTThreadPoke(pStreamOSS->hThreadDrain); rc = RTThreadWait(pStreamOSS->hThreadDrain, 1 /*ms*/, NULL); } } if (RT_SUCCESS(rc)) { LogFlowFunc(("Done draining.\n")); pStreamOSS->hThreadDrain = NIL_RTTHREAD; } else LogFlowFunc(("No, still draining...\n")); pStreamOSS->fDraining = false; } /* * Enable the stream. */ int fMask = pStreamOSS->Cfg.enmDir == PDMAUDIODIR_IN ? PCM_ENABLE_INPUT : PCM_ENABLE_OUTPUT; if (ioctl(pStreamOSS->hFile, SNDCTL_DSP_SETTRIGGER, &fMask) >= 0) rc = VINF_SUCCESS; else { LogRel(("OSS: Failed to enable output stream: %s (%d)\n", strerror(errno), errno)); rc = RTErrConvertFromErrno(errno); } LogFlowFunc(("returns %Rrc for '%s'\n", rc, pStreamOSS->Cfg.szName)); return rc; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDisable} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamDisable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; LogFlowFunc(("Stream '%s'\n", pStreamOSS->Cfg.szName)); int rc; /* * If we're still draining, try kick the thread before we try disable the stream. */ if (pStreamOSS->fDraining) { LogFlowFunc(("Trying to cancel draining...\n")); if (pStreamOSS->hThreadDrain != NIL_RTTHREAD) { RTThreadPoke(pStreamOSS->hThreadDrain); rc = RTThreadWait(pStreamOSS->hThreadDrain, 1 /*ms*/, NULL); if (RT_SUCCESS(rc) || rc == VERR_INVALID_HANDLE) pStreamOSS->fDraining = false; else LogFunc(("Failed to cancel draining (%Rrc)\n", rc)); } else { LogFlowFunc(("Thread handle is NIL, so we can't be draining\n")); pStreamOSS->fDraining = false; } } /* * The Official documentation says this isn't the right way to stop * playback. It may work in some implementations but fail in all others... * Suggest SNDCTL_DSP_RESET / SNDCTL_DSP_HALT. * * So, let's do both and see how that works out... */ rc = VINF_SUCCESS; int fMask = 0; if (ioctl(pStreamOSS->hFile, SNDCTL_DSP_SETTRIGGER, &fMask) >= 0) LogFlowFunc(("SNDCTL_DSP_SETTRIGGER succeeded\n")); else { LogRel(("OSS: Failed to clear triggers for stream '%s': %s (%d)\n", pStreamOSS->Cfg.szName, strerror(errno), errno)); rc = RTErrConvertFromErrno(errno); } if (ioctl(pStreamOSS->hFile, SNDCTL_DSP_RESET, NULL) >= 0) LogFlowFunc(("SNDCTL_DSP_RESET succeeded\n")); else { LogRel(("OSS: Failed to reset stream '%s': %s (%d)\n", pStreamOSS->Cfg.szName, strerror(errno), errno)); rc = RTErrConvertFromErrno(errno); } LogFlowFunc(("returns %Rrc for '%s'\n", rc, pStreamOSS->Cfg.szName)); return rc; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPause} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamPause(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { return drvHstAudOssHA_StreamDisable(pInterface, pStream); } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamResume} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamResume(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { return drvHstAudOssHA_StreamEnable(pInterface, pStream); } /** * @callback_method_impl{FNRTTHREAD, * Thread for calling SNDCTL_DSP_SYNC (blocking) on an output stream.} */ static DECLCALLBACK(int) drvHstAudOssDrainThread(RTTHREAD ThreadSelf, void *pvUser) { RT_NOREF(ThreadSelf); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pvUser; int rc; /* Make it blocking (for Linux). */ int fOrgFlags = fcntl(pStreamOSS->hFile, F_GETFL, 0); LogFunc(("F_GETFL -> %#x\n", fOrgFlags)); Assert(fOrgFlags != -1); if (fOrgFlags != -1 && (fOrgFlags & O_NONBLOCK)) { rc = fcntl(pStreamOSS->hFile, F_SETFL, fOrgFlags & ~O_NONBLOCK); AssertStmt(rc != -1, fOrgFlags = -1); } /* Drain it. */ LogFunc(("Calling SNDCTL_DSP_SYNC now...\n")); rc = ioctl(pStreamOSS->hFile, SNDCTL_DSP_SYNC, NULL); LogFunc(("SNDCTL_DSP_SYNC returned %d / errno=%d\n", rc, errno)); RT_NOREF(rc); /* Re-enable non-blocking mode and disable it. */ if (fOrgFlags != -1) { rc = fcntl(pStreamOSS->hFile, F_SETFL, fOrgFlags); Assert(rc != -1); int fMask = 0; rc = ioctl(pStreamOSS->hFile, SNDCTL_DSP_SETTRIGGER, &fMask); Assert(rc >= 0); pStreamOSS->fDraining = false; LogFunc(("Restored non-block mode and cleared the trigger mask\n")); } return VINF_SUCCESS; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamDrain} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamDrain(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { PDRVHSTAUDOSS pThis = RT_FROM_MEMBER(pInterface, DRVHSTAUDOSS, IHostAudio); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertReturn(pStreamOSS->Cfg.enmDir == PDMAUDIODIR_OUT, VERR_WRONG_ORDER); pStreamOSS->fDraining = true; /* * Because the SNDCTL_DSP_SYNC call is blocking on real OSS, * we kick off a thread to deal with it as we're probably on EMT * and cannot block for extended periods. */ if (pStreamOSS->hThreadDrain != NIL_RTTHREAD) { int rc = RTThreadWait(pStreamOSS->hThreadDrain, 0, NULL); if (RT_SUCCESS(rc)) { pStreamOSS->hThreadDrain = NIL_RTTHREAD; LogFunc(("Cleaned up stale thread handle.\n")); } else { LogFunc(("Drain thread already running (%Rrc).\n", rc)); AssertMsg(rc == VERR_TIMEOUT, ("%Rrc\n", rc)); return rc == VERR_TIMEOUT ? VINF_SUCCESS : rc; } } int rc = RTThreadCreateF(&pStreamOSS->hThreadDrain, drvHstAudOssDrainThread, pStreamOSS, 0, RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "ossdrai%u", pThis->pDrvIns->iInstance); LogFunc(("Started drain thread: %Rrc\n", rc)); AssertRCReturn(rc, rc); return VINF_SUCCESS; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetState} */ static DECLCALLBACK(PDMHOSTAUDIOSTREAMSTATE) drvHstAudOssHA_StreamGetState(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertPtrReturn(pStreamOSS, PDMHOSTAUDIOSTREAMSTATE_INVALID); if (!pStreamOSS->fDraining) return PDMHOSTAUDIOSTREAMSTATE_OKAY; return PDMHOSTAUDIOSTREAMSTATE_DRAINING; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetWritable} */ static DECLCALLBACK(uint32_t) drvHstAudOssHA_StreamGetWritable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertPtr(pStreamOSS); /* * The logic here must match what StreamPlay does. * * Note! We now use 'bytes' rather than the fragments * fragsize as we used * to do (up to 2021), as these are documented as obsolete. */ audio_buf_info BufInfo = { 0, 0, 0, 0 }; int rc2 = ioctl(pStreamOSS->hFile, SNDCTL_DSP_GETOSPACE, &BufInfo); AssertMsgReturn(rc2 >= 0, ("SNDCTL_DSP_GETOSPACE failed: %s (%d)\n", strerror(errno), errno), 0); /* Try use the size. */ uint32_t cbRet; uint32_t const cbBuf = pStreamOSS->OssCfg.cbFragment * pStreamOSS->OssCfg.cFragments; if (BufInfo.bytes >= 0 && (unsigned)BufInfo.bytes <= cbBuf) cbRet = BufInfo.bytes; else { AssertMsgFailed(("Invalid available size: %d\n", BufInfo.bytes)); AssertMsgReturn(BufInfo.fragments >= 0, ("fragments: %d\n", BufInfo.fragments), 0); AssertMsgReturn(BufInfo.fragsize >= 0, ("fragsize: %d\n", BufInfo.fragsize), 0); cbRet = (uint32_t)(BufInfo.fragments * BufInfo.fragsize); AssertMsgStmt(cbRet <= cbBuf, ("fragsize*fragments: %d, cbBuf=%#x\n", cbRet, cbBuf), 0); } Log4Func(("returns %#x (%u) [cbBuf=%#x]\n", cbRet, cbRet, cbBuf)); return cbRet; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamPlay} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamPlay(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream, const void *pvBuf, uint32_t cbBuf, uint32_t *pcbWritten) { RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER); /* * Return immediately if this is a draining service call. * * Otherwise the ioctl below will race the drain thread and sometimes fail, * triggering annoying assertion and release logging. */ if (cbBuf || !pStreamOSS->fDraining) { /* likely */ } else { *pcbWritten = 0; return VINF_SUCCESS; } /* * Figure out now much to write (same as drvHstAudOssHA_StreamGetWritable, * must match exactly). */ audio_buf_info BufInfo; int rc2 = ioctl(pStreamOSS->hFile, SNDCTL_DSP_GETOSPACE, &BufInfo); AssertLogRelMsgReturn(rc2 >= 0, ("OSS: Failed to retrieve current playback buffer: %s (%d, hFile=%d, rc2=%d)\n", strerror(errno), errno, pStreamOSS->hFile, rc2), RTErrConvertFromErrno(errno)); uint32_t cbToWrite; uint32_t const cbStreamBuf = pStreamOSS->OssCfg.cbFragment * pStreamOSS->OssCfg.cFragments; if (BufInfo.bytes >= 0 && (unsigned)BufInfo.bytes <= cbStreamBuf) cbToWrite = BufInfo.bytes; else { AssertMsgFailed(("Invalid available size: %d\n", BufInfo.bytes)); AssertMsgReturn(BufInfo.fragments >= 0, ("fragments: %d\n", BufInfo.fragments), 0); AssertMsgReturn(BufInfo.fragsize >= 0, ("fragsize: %d\n", BufInfo.fragsize), 0); cbToWrite = (uint32_t)(BufInfo.fragments * BufInfo.fragsize); AssertMsgStmt(cbToWrite <= cbStreamBuf, ("fragsize*fragments: %d, cbStreamBuf=%#x\n", cbToWrite, cbStreamBuf), 0); } cbToWrite = RT_MIN(cbToWrite, cbBuf); Log3Func(("@%#RX64 cbBuf=%#x BufInfo: fragments=%#x fragstotal=%#x fragsize=%#x bytes=%#x %s cbToWrite=%#x\n", pStreamOSS->offInternal, cbBuf, BufInfo.fragments, BufInfo.fragstotal, BufInfo.fragsize, BufInfo.bytes, pStreamOSS->Cfg.szName, cbToWrite)); /* * Write. */ uint8_t const *pbBuf = (uint8_t const *)pvBuf; uint32_t cbChunk = cbToWrite; uint32_t offChunk = 0; while (cbChunk > 0) { ssize_t cbWritten = write(pStreamOSS->hFile, &pbBuf[offChunk], RT_MIN(cbChunk, pStreamOSS->OssCfg.cbFragment)); if (cbWritten > 0) { AssertLogRelMsg(!(cbWritten & pStreamOSS->uAlign), ("OSS: Misaligned write (written %#zx, alignment %#x)\n", cbWritten, pStreamOSS->uAlign)); Assert((uint32_t)cbWritten <= cbChunk); offChunk += (uint32_t)cbWritten; cbChunk -= (uint32_t)cbWritten; pStreamOSS->offInternal += cbWritten; } else if (cbWritten == 0) { LogFunc(("@%#RX64 write(%#x) returned zeroed (previously wrote %#x bytes)!\n", pStreamOSS->offInternal, RT_MIN(cbChunk, pStreamOSS->OssCfg.cbFragment), cbWritten)); break; } else { LogRel(("OSS: Failed writing output data: %s (%d)\n", strerror(errno), errno)); return RTErrConvertFromErrno(errno); } } *pcbWritten = offChunk; return VINF_SUCCESS; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamGetReadable} */ static DECLCALLBACK(uint32_t) drvHstAudOssHA_StreamGetReadable(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream) { RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertPtr(pStreamOSS); /* * Use SNDCTL_DSP_GETISPACE to see how much we can read. * * Note! We now use 'bytes' rather than the fragments * fragsize as we used * to do (up to 2021), as these are documented as obsolete. */ audio_buf_info BufInfo = { 0, 0, 0, 0 }; int rc2 = ioctl(pStreamOSS->hFile, SNDCTL_DSP_GETISPACE, &BufInfo); AssertMsgReturn(rc2 >= 0, ("SNDCTL_DSP_GETISPACE failed: %s (%d)\n", strerror(errno), errno), 0); uint32_t cbRet; uint32_t const cbBuf = pStreamOSS->OssCfg.cbFragment * pStreamOSS->OssCfg.cFragments; if (BufInfo.bytes >= 0 && (unsigned)BufInfo.bytes <= cbBuf) cbRet = BufInfo.bytes; else { AssertMsgFailed(("Invalid available size: %d\n", BufInfo.bytes)); AssertMsgReturn(BufInfo.fragments >= 0, ("fragments: %d\n", BufInfo.fragments), 0); AssertMsgReturn(BufInfo.fragsize >= 0, ("fragsize: %d\n", BufInfo.fragsize), 0); cbRet = (uint32_t)(BufInfo.fragments * BufInfo.fragsize); AssertMsgStmt(cbRet <= cbBuf, ("fragsize*fragments: %d, cbBuf=%#x\n", cbRet, cbBuf), 0); } /* * HACK ALERT! To force the stream to start recording, we read a frame * here if we get back that there are zero bytes available * and we're at the start of the stream. (We cannot just * return a frame size, we have to read it, as pre-buffering * would prevent it from being read.) */ if (BufInfo.bytes > 0 || pStreamOSS->offInternal != 0) { /* likely */ } else { uint32_t cbToRead = PDMAudioPropsFramesToBytes(&pStreamOSS->Cfg.Props, 1); uint8_t abFrame[256]; Assert(cbToRead < sizeof(abFrame)); ssize_t cbRead = read(pStreamOSS->hFile, abFrame, cbToRead); RT_NOREF(cbRead); LogFunc(("Dummy read for '%s' returns %zd (errno=%d)\n", pStreamOSS->Cfg.szName, cbRead, errno)); } Log4Func(("returns %#x (%u) [cbBuf=%#x]\n", cbRet, cbRet, cbBuf)); return cbRet; } /** * @interface_method_impl{PDMIHOSTAUDIO,pfnStreamCapture} */ static DECLCALLBACK(int) drvHstAudOssHA_StreamCapture(PPDMIHOSTAUDIO pInterface, PPDMAUDIOBACKENDSTREAM pStream, void *pvBuf, uint32_t cbBuf, uint32_t *pcbRead) { RT_NOREF(pInterface); PDRVHSTAUDOSSSTREAM pStreamOSS = (PDRVHSTAUDOSSSTREAM)pStream; AssertPtrReturn(pStreamOSS, VERR_INVALID_POINTER); Log3Func(("@%#RX64 cbBuf=%#x %s\n", pStreamOSS->offInternal, cbBuf, pStreamOSS->Cfg.szName)); size_t cbToRead = cbBuf; uint8_t * const pbDst = (uint8_t *)pvBuf; size_t offWrite = 0; while (cbToRead > 0) { ssize_t cbRead = read(pStreamOSS->hFile, &pbDst[offWrite], cbToRead); if (cbRead > 0) { LogFlowFunc(("cbRead=%zi, offWrite=%zu cbToRead=%zu\n", cbRead, offWrite, cbToRead)); Assert((ssize_t)cbToRead >= cbRead); cbToRead -= cbRead; offWrite += cbRead; pStreamOSS->offInternal += cbRead; } else { LogFunc(("cbRead=%zi, offWrite=%zu cbToRead=%zu errno=%d\n", cbRead, offWrite, cbToRead, errno)); /* Don't complain about errors if we've retrieved some audio data already. */ if (cbRead < 0 && offWrite == 0 && errno != EINTR && errno != EAGAIN) { AssertStmt(errno != 0, errno = EACCES); int rc = RTErrConvertFromErrno(errno); LogFunc(("Failed to read %zu input frames, errno=%d rc=%Rrc\n", cbToRead, errno, rc)); return rc; } break; } } *pcbRead = offWrite; return VINF_SUCCESS; } /** * @interface_method_impl{PDMIBASE,pfnQueryInterface} */ static DECLCALLBACK(void *) drvHstAudOssQueryInterface(PPDMIBASE pInterface, const char *pszIID) { PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface); PDRVHSTAUDOSS pThis = PDMINS_2_DATA(pDrvIns, PDRVHSTAUDOSS); PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase); PDMIBASE_RETURN_INTERFACE(pszIID, PDMIHOSTAUDIO, &pThis->IHostAudio); return NULL; } /** * @interface_method_impl{PDMDRVREG,pfnConstruct, * Constructs an OSS audio driver instance.} */ static DECLCALLBACK(int) drvHstAudOssConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags) { RT_NOREF(pCfg, fFlags); PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns); PDRVHSTAUDOSS pThis = PDMINS_2_DATA(pDrvIns, PDRVHSTAUDOSS); LogRel(("Audio: Initializing OSS driver\n")); /* * Init the static parts. */ pThis->pDrvIns = pDrvIns; /* IBase */ pDrvIns->IBase.pfnQueryInterface = drvHstAudOssQueryInterface; /* IHostAudio */ pThis->IHostAudio.pfnGetConfig = drvHstAudOssHA_GetConfig; pThis->IHostAudio.pfnGetDevices = NULL; pThis->IHostAudio.pfnSetDevice = NULL; pThis->IHostAudio.pfnGetStatus = drvHstAudOssHA_GetStatus; pThis->IHostAudio.pfnDoOnWorkerThread = NULL; pThis->IHostAudio.pfnStreamConfigHint = NULL; pThis->IHostAudio.pfnStreamCreate = drvHstAudOssHA_StreamCreate; pThis->IHostAudio.pfnStreamInitAsync = NULL; pThis->IHostAudio.pfnStreamDestroy = drvHstAudOssHA_StreamDestroy; pThis->IHostAudio.pfnStreamNotifyDeviceChanged = NULL; pThis->IHostAudio.pfnStreamEnable = drvHstAudOssHA_StreamEnable; pThis->IHostAudio.pfnStreamDisable = drvHstAudOssHA_StreamDisable; pThis->IHostAudio.pfnStreamPause = drvHstAudOssHA_StreamPause; pThis->IHostAudio.pfnStreamResume = drvHstAudOssHA_StreamResume; pThis->IHostAudio.pfnStreamDrain = drvHstAudOssHA_StreamDrain; pThis->IHostAudio.pfnStreamGetState = drvHstAudOssHA_StreamGetState; pThis->IHostAudio.pfnStreamGetPending = NULL; pThis->IHostAudio.pfnStreamGetWritable = drvHstAudOssHA_StreamGetWritable; pThis->IHostAudio.pfnStreamPlay = drvHstAudOssHA_StreamPlay; pThis->IHostAudio.pfnStreamGetReadable = drvHstAudOssHA_StreamGetReadable; pThis->IHostAudio.pfnStreamCapture = drvHstAudOssHA_StreamCapture; return VINF_SUCCESS; } /** * OSS driver registration record. */ const PDMDRVREG g_DrvHostOSSAudio = { /* u32Version */ PDM_DRVREG_VERSION, /* szName */ "OSSAudio", /* szRCMod */ "", /* szR0Mod */ "", /* pszDescription */ "OSS audio host driver", /* fFlags */ PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT, /* fClass. */ PDM_DRVREG_CLASS_AUDIO, /* cMaxInstances */ ~0U, /* cbInstance */ sizeof(DRVHSTAUDOSS), /* pfnConstruct */ drvHstAudOssConstruct, /* pfnDestruct */ NULL, /* pfnRelocate */ NULL, /* pfnIOCtl */ NULL, /* pfnPowerOn */ NULL, /* pfnReset */ NULL, /* pfnSuspend */ NULL, /* pfnResume */ NULL, /* pfnAttach */ NULL, /* pfnDetach */ NULL, /* pfnPowerOff */ NULL, /* pfnSoftReset */ NULL, /* u32EndVersion */ PDM_DRVREG_VERSION };