VirtualBox

source: vbox/trunk/src/VBox/Main/include/AudioDriver.h@ 106004

Last change on this file since 106004 was 98103, checked in by vboxsync, 2 years ago

Copyright year updates by scm.

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File size: 4.1 KB
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1/* $Id: AudioDriver.h 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * VirtualBox audio base class for Main audio drivers.
4 */
5
6/*
7 * Copyright (C) 2018-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28#ifndef MAIN_INCLUDED_AudioDriver_h
29#define MAIN_INCLUDED_AudioDriver_h
30#ifndef RT_WITHOUT_PRAGMA_ONCE
31# pragma once
32#endif
33
34#include <VBox/com/ptr.h>
35#include <VBox/com/string.h>
36#include <VBox/com/AutoLock.h>
37
38using namespace com;
39
40/**
41 * Audio driver configuration for audio drivers implemented
42 * in Main.
43 */
44struct AudioDriverCfg
45{
46 AudioDriverCfg(Utf8Str a_strDev = "", unsigned a_uInst = 0, unsigned a_uLUN = 0, Utf8Str a_strName = "",
47 bool a_fEnabledIn = false, bool a_fEnabledOut = false)
48 : strDev(a_strDev)
49 , uInst(a_uInst)
50 , uLUN(a_uLUN)
51 , strName(a_strName)
52 , fEnabledIn(a_fEnabledIn)
53 , fEnabledOut(a_fEnabledOut)
54 { }
55
56 /** Copy assignment operator. */
57 AudioDriverCfg& operator=(AudioDriverCfg const &a_rThat) RT_NOEXCEPT
58 {
59 this->strDev = a_rThat.strDev;
60 this->uInst = a_rThat.uInst;
61 this->uLUN = a_rThat.uLUN;
62 this->strName = a_rThat.strName;
63 this->fEnabledIn = a_rThat.fEnabledIn;
64 this->fEnabledOut = a_rThat.fEnabledOut;
65
66 return *this;
67 }
68
69 /** The device name. */
70 Utf8Str strDev;
71 /** The device instance. */
72 unsigned uInst;
73 /** The LUN the driver is attached to.
74 * Set the UINT8_MAX if not attached. */
75 unsigned uLUN;
76 /** The driver name. */
77 Utf8Str strName;
78 /** Whether input is enabled. */
79 bool fEnabledIn;
80 /** Whether output is enabled. */
81 bool fEnabledOut;
82};
83
84class Console;
85
86/**
87 * Base class for all audio drivers implemented in Main.
88 */
89class AudioDriver
90{
91
92public:
93 AudioDriver(Console *pConsole);
94 virtual ~AudioDriver();
95
96 /** Copy assignment operator. */
97 AudioDriver &operator=(AudioDriver const &a_rThat) RT_NOEXCEPT;
98
99 Console *GetParent(void) { return mpConsole; }
100
101 AudioDriverCfg *GetConfig(void) { return &mCfg; }
102 int InitializeConfig(AudioDriverCfg *pCfg);
103
104 /** Checks if audio is configured or not. */
105 bool isConfigured() const { return mCfg.strName.isNotEmpty(); }
106
107 bool IsAttached(void) { return mfAttached; }
108
109 int doAttachDriverViaEmt(PUVM pUVM, PCVMMR3VTABLE pVMM, util::AutoWriteLock *pAutoLock);
110 int doDetachDriverViaEmt(PUVM pUVM, PCVMMR3VTABLE pVMM, util::AutoWriteLock *pAutoLock);
111
112protected:
113 static DECLCALLBACK(int) attachDriverOnEmt(AudioDriver *pThis);
114 static DECLCALLBACK(int) detachDriverOnEmt(AudioDriver *pThis);
115
116 int configure(unsigned uLUN, bool fAttach);
117
118 /**
119 * Virtual function for child specific driver configuration.
120 *
121 * This is called at the end of AudioDriver::configure().
122 *
123 * @returns VBox status code.
124 * @param pLunCfg CFGM configuration node of the driver.
125 * @param pVMM The VMM ring-3 vtable.
126 */
127 virtual int configureDriver(PCFGMNODE pLunCfg, PCVMMR3VTABLE pVMM)
128 {
129 RT_NOREF(pLunCfg, pVMM);
130 return VINF_SUCCESS;
131 }
132
133protected:
134
135 /** Pointer to parent. */
136 Console *mpConsole;
137 /** The driver's configuration. */
138 AudioDriverCfg mCfg;
139 /** Whether the driver is attached or not. */
140 bool mfAttached;
141};
142
143#endif /* !MAIN_INCLUDED_AudioDriver_h */
144
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