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/* $Id: AudioDriver.cpp $ */
/** @file
* VirtualBox audio base class for Main audio drivers.
*/
/*
* Copyright (C) 2018-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* SPDX-License-Identifier: GPL-3.0-only
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DRV_HOST_AUDIO
#include "LoggingNew.h"
#include <VBox/log.h>
#include <VBox/vmm/cfgm.h>
#include <VBox/vmm/pdmaudioifs.h>
#include <VBox/vmm/pdmapi.h>
#include <VBox/vmm/pdmdrv.h>
#include <VBox/vmm/vmmr3vtable.h>
#include "AudioDriver.h"
#include "ConsoleImpl.h"
AudioDriver::AudioDriver(Console *pConsole)
: mpConsole(pConsole)
, mfAttached(false)
{
}
AudioDriver::~AudioDriver(void)
{
}
AudioDriver &AudioDriver::operator=(AudioDriver const &a_rThat) RT_NOEXCEPT
{
mpConsole = a_rThat.mpConsole;
mCfg = a_rThat.mCfg;
mfAttached = a_rThat.mfAttached;
return *this;
}
/**
* Initializes the audio driver with a certain (device) configuration.
*
* @returns VBox status code.
* @param pCfg Audio driver configuration to use.
*/
int AudioDriver::InitializeConfig(AudioDriverCfg *pCfg)
{
AssertPtrReturn(pCfg, VERR_INVALID_POINTER);
/* Sanity. */
AssertReturn(pCfg->strDev.isNotEmpty(), VERR_INVALID_PARAMETER);
AssertReturn(pCfg->uLUN != UINT8_MAX, VERR_INVALID_PARAMETER);
AssertReturn(pCfg->strName.isNotEmpty(), VERR_INVALID_PARAMETER);
/* Apply configuration. */
mCfg = *pCfg;
return VINF_SUCCESS;
}
/**
* Attaches the driver via EMT, if configured.
*
* @returns VBox status code.
* @param pUVM The user mode VM handle for talking to EMT.
* @param pVMM The VMM ring-3 vtable.
* @param pAutoLock The callers auto lock instance. Can be NULL if not
* locked.
*/
int AudioDriver::doAttachDriverViaEmt(PUVM pUVM, PCVMMR3VTABLE pVMM, util::AutoWriteLock *pAutoLock)
{
if (!isConfigured())
return VINF_SUCCESS;
PVMREQ pReq;
int vrc = pVMM->pfnVMR3ReqCallU(pUVM, VMCPUID_ANY, &pReq, 0 /* no wait! */, VMREQFLAGS_VBOX_STATUS,
(PFNRT)attachDriverOnEmt, 1, this);
if (vrc == VERR_TIMEOUT)
{
/* Release the lock before a blocking VMR3* call (EMT might wait for it, @bugref{7648})! */
if (pAutoLock)
pAutoLock->release();
vrc = pVMM->pfnVMR3ReqWait(pReq, RT_INDEFINITE_WAIT);
if (pAutoLock)
pAutoLock->acquire();
}
AssertRC(vrc);
pVMM->pfnVMR3ReqFree(pReq);
return vrc;
}
/**
* Configures the audio driver (to CFGM) and attaches it to the audio chain.
* Does nothing if the audio driver already is attached.
*
* @returns VBox status code.
* @param pThis Audio driver to detach.
*/
/* static */
DECLCALLBACK(int) AudioDriver::attachDriverOnEmt(AudioDriver *pThis)
{
AssertPtrReturn(pThis, VERR_INVALID_POINTER);
Console::SafeVMPtrQuiet ptrVM(pThis->mpConsole);
Assert(ptrVM.isOk());
if (pThis->mfAttached) /* Already attached? Bail out. */
{
LogFunc(("%s: Already attached\n", pThis->mCfg.strName.c_str()));
return VINF_SUCCESS;
}
AudioDriverCfg *pCfg = &pThis->mCfg;
LogFunc(("strName=%s, strDevice=%s, uInst=%u, uLUN=%u\n",
pCfg->strName.c_str(), pCfg->strDev.c_str(), pCfg->uInst, pCfg->uLUN));
/* Detach the driver chain from the audio device first. */
int vrc = ptrVM.vtable()->pfnPDMR3DeviceDetach(ptrVM.rawUVM(), pCfg->strDev.c_str(), pCfg->uInst, pCfg->uLUN, 0 /* fFlags */);
if (RT_SUCCESS(vrc))
{
vrc = pThis->configure(pCfg->uLUN, true /* Attach */);
if (RT_SUCCESS(vrc))
vrc = ptrVM.vtable()->pfnPDMR3DriverAttach(ptrVM.rawUVM(), pCfg->strDev.c_str(), pCfg->uInst, pCfg->uLUN,
0 /* fFlags */, NULL /* ppBase */);
}
if (RT_SUCCESS(vrc))
{
pThis->mfAttached = true;
LogRel2(("%s: Driver attached (LUN #%u)\n", pCfg->strName.c_str(), pCfg->uLUN));
}
else
LogRel(("%s: Failed to attach audio driver, rc=%Rrc\n", pCfg->strName.c_str(), vrc));
LogFunc(("Returning %Rrc\n", vrc));
return vrc;
}
/**
* Detatches the driver via EMT, if configured.
*
* @returns VBox status code.
* @param pUVM The user mode VM handle for talking to EMT.
* @param pVMM The VMM ring-3 vtable.
* @param pAutoLock The callers auto lock instance. Can be NULL if not
* locked.
*/
int AudioDriver::doDetachDriverViaEmt(PUVM pUVM, PCVMMR3VTABLE pVMM, util::AutoWriteLock *pAutoLock)
{
if (!isConfigured())
return VINF_SUCCESS;
PVMREQ pReq;
int vrc = pVMM->pfnVMR3ReqCallU(pUVM, VMCPUID_ANY, &pReq, 0 /* no wait! */, VMREQFLAGS_VBOX_STATUS,
(PFNRT)detachDriverOnEmt, 1, this);
if (vrc == VERR_TIMEOUT)
{
/* Release the lock before a blocking VMR3* call (EMT might wait for it, @bugref{7648})! */
if (pAutoLock)
pAutoLock->release();
vrc = pVMM->pfnVMR3ReqWait(pReq, RT_INDEFINITE_WAIT);
if (pAutoLock)
pAutoLock->acquire();
}
AssertRC(vrc);
pVMM->pfnVMR3ReqFree(pReq);
return vrc;
}
/**
* Detaches an already attached audio driver from the audio chain.
* Does nothing if the audio driver already is detached or not attached.
*
* @returns VBox status code.
* @param pThis Audio driver to detach.
*/
/* static */
DECLCALLBACK(int) AudioDriver::detachDriverOnEmt(AudioDriver *pThis)
{
AssertPtrReturn(pThis, VERR_INVALID_POINTER);
if (!pThis->mfAttached) /* Not attached? Bail out. */
{
LogFunc(("%s: Not attached\n", pThis->mCfg.strName.c_str()));
return VINF_SUCCESS;
}
Console::SafeVMPtrQuiet ptrVM(pThis->mpConsole);
Assert(ptrVM.isOk());
AudioDriverCfg *pCfg = &pThis->mCfg;
Assert(pCfg->uLUN != UINT8_MAX);
LogFunc(("strName=%s, strDevice=%s, uInst=%u, uLUN=%u\n",
pCfg->strName.c_str(), pCfg->strDev.c_str(), pCfg->uInst, pCfg->uLUN));
/* Destroy the entire driver chain for the specified LUN.
*
* Start with the "AUDIO" driver, as this driver serves as the audio connector between
* the device emulation and the select backend(s). */
int vrc = ptrVM.vtable()->pfnPDMR3DriverDetach(ptrVM.rawUVM(), pCfg->strDev.c_str(), pCfg->uInst, pCfg->uLUN,
"AUDIO", 0 /* iOccurrence */, 0 /* fFlags */);
if (RT_SUCCESS(vrc))
vrc = pThis->configure(pCfg->uLUN, false /* Detach */);/** @todo r=bird: Illogical and from what I can tell pointless! */
if (RT_SUCCESS(vrc))
{
pThis->mfAttached = false;
LogRel2(("%s: Driver detached\n", pCfg->strName.c_str()));
}
else
LogRel(("%s: Failed to detach audio driver, vrc=%Rrc\n", pCfg->strName.c_str(), vrc));
LogFunc(("Returning %Rrc\n", vrc));
return vrc;
}
/**
* Configures the audio driver via CFGM.
*
* @returns VBox status code.
* @param uLUN LUN to attach driver to.
* @param fAttach Whether to attach or detach the driver configuration to CFGM.
*
* @thread EMT
*/
int AudioDriver::configure(unsigned uLUN, bool fAttach)
{
Console::SafeVMPtrQuiet ptrVM(mpConsole);
AssertReturn(ptrVM.isOk(), VERR_INVALID_STATE);
PCFGMNODE pRoot = ptrVM.vtable()->pfnCFGMR3GetRootU(ptrVM.rawUVM());
AssertPtr(pRoot);
PCFGMNODE pDev0 = ptrVM.vtable()->pfnCFGMR3GetChildF(pRoot, "Devices/%s/%u/", mCfg.strDev.c_str(), mCfg.uInst);
if (!pDev0) /* No audio device configured? Bail out. */
{
LogRel2(("%s: No audio device configured, skipping to attach driver\n", mCfg.strName.c_str()));
return VINF_SUCCESS;
}
int vrc = VINF_SUCCESS;
PCFGMNODE pDevLun = ptrVM.vtable()->pfnCFGMR3GetChildF(pDev0, "LUN#%u/", uLUN);
if (fAttach)
{
do /* break "loop" */
{
AssertMsgBreakStmt(pDevLun, ("%s: Device LUN #%u not found\n", mCfg.strName.c_str(), uLUN), vrc = VERR_NOT_FOUND);
LogRel2(("%s: Configuring audio driver (to LUN #%u)\n", mCfg.strName.c_str(), uLUN));
ptrVM.vtable()->pfnCFGMR3RemoveNode(pDevLun); /* Remove LUN completely first. */
/* Insert new LUN configuration and build up the new driver chain. */
vrc = ptrVM.vtable()->pfnCFGMR3InsertNodeF(pDev0, &pDevLun, "LUN#%u/", uLUN); AssertRCBreak(vrc);
vrc = ptrVM.vtable()->pfnCFGMR3InsertString(pDevLun, "Driver", "AUDIO"); AssertRCBreak(vrc);
PCFGMNODE pLunCfg;
vrc = ptrVM.vtable()->pfnCFGMR3InsertNode(pDevLun, "Config", &pLunCfg); AssertRCBreak(vrc);
vrc = ptrVM.vtable()->pfnCFGMR3InsertStringF(pLunCfg, "DriverName", "%s", mCfg.strName.c_str()); AssertRCBreak(vrc);
vrc = ptrVM.vtable()->pfnCFGMR3InsertInteger(pLunCfg, "InputEnabled", mCfg.fEnabledIn); AssertRCBreak(vrc);
vrc = ptrVM.vtable()->pfnCFGMR3InsertInteger(pLunCfg, "OutputEnabled", mCfg.fEnabledOut); AssertRCBreak(vrc);
PCFGMNODE pAttachedDriver;
vrc = ptrVM.vtable()->pfnCFGMR3InsertNode(pDevLun, "AttachedDriver", &pAttachedDriver); AssertRCBreak(vrc);
vrc = ptrVM.vtable()->pfnCFGMR3InsertStringF(pAttachedDriver, "Driver", "%s", mCfg.strName.c_str()); AssertRCBreak(vrc);
PCFGMNODE pAttachedDriverCfg;
vrc = ptrVM.vtable()->pfnCFGMR3InsertNode(pAttachedDriver, "Config", &pAttachedDriverCfg); AssertRCBreak(vrc);
/* Call the (virtual) method for driver-specific configuration. */
vrc = configureDriver(pAttachedDriverCfg, ptrVM.vtable()); AssertRCBreak(vrc);
} while (0);
}
else /* Detach */
{
LogRel2(("%s: Unconfiguring audio driver\n", mCfg.strName.c_str()));
}
if (RT_SUCCESS(vrc))
{
#ifdef LOG_ENABLED
LogFunc(("%s: fAttach=%RTbool\n", mCfg.strName.c_str(), fAttach));
ptrVM.vtable()->pfnCFGMR3Dump(pDevLun);
#endif
}
else
LogRel(("%s: %s audio driver failed with vrc=%Rrc\n", mCfg.strName.c_str(), fAttach ? "Configuring" : "Unconfiguring", vrc));
LogFunc(("Returning %Rrc\n", vrc));
return vrc;
}
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