| 1 | /* $Id: AudioMixer.h 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | * VBox audio - Mixing routines.
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| 4 | *
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| 5 | * The mixing routines are mainly used by the various audio device emulations
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| 6 | * to achieve proper multiplexing from/to attached devices LUNs.
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| 7 | */
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| 8 |
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| 9 | /*
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| 10 | * Copyright (C) 2014-2024 Oracle and/or its affiliates.
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| 11 | *
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| 12 | * This file is part of VirtualBox base platform packages, as
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| 13 | * available from https://www.virtualbox.org.
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| 14 | *
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| 15 | * This program is free software; you can redistribute it and/or
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| 16 | * modify it under the terms of the GNU General Public License
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| 17 | * as published by the Free Software Foundation, in version 3 of the
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| 18 | * License.
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| 19 | *
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| 20 | * This program is distributed in the hope that it will be useful, but
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| 21 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 23 | * General Public License for more details.
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| 24 | *
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| 25 | * You should have received a copy of the GNU General Public License
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| 26 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 27 | *
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| 28 | * SPDX-License-Identifier: GPL-3.0-only
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| 29 | */
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| 30 |
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| 31 | #ifndef VBOX_INCLUDED_SRC_Audio_AudioMixer_h
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| 32 | #define VBOX_INCLUDED_SRC_Audio_AudioMixer_h
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| 33 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 34 | # pragma once
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| 35 | #endif
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| 36 |
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| 37 | #include <iprt/cdefs.h>
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| 38 | #include <iprt/critsect.h>
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| 39 |
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| 40 | #include <VBox/vmm/pdmaudioifs.h>
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| 41 | #include "AudioMixBuffer.h"
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| 42 | #include "AudioHlp.h"
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| 43 |
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| 44 |
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| 45 | /** @defgroup grp_pdm_ifs_audio_mixing Audio Mixing
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| 46 | * @ingroup grp_pdm_ifs_audio
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| 47 | *
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| 48 | * @note This is currently placed under PDM Audio Interface as that seemed like
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| 49 | * the best place for it.
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| 50 | *
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| 51 | * @{
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| 52 | */
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| 53 |
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| 54 | /** Pointer to an audio mixer sink. */
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| 55 | typedef struct AUDMIXSINK *PAUDMIXSINK;
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| 56 | /** Pointer to a const audio mixer sink. */
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| 57 | typedef struct AUDMIXSINK const *PCAUDMIXSINK;
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| 58 |
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| 59 |
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| 60 | /**
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| 61 | * Audio mixer instance.
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| 62 | */
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| 63 | typedef struct AUDIOMIXER
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| 64 | {
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| 65 | /** Magic value (AUDIOMIXER_MAGIC). */
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| 66 | uintptr_t uMagic;
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| 67 | /** The mixer's name (allocated after this structure). */
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| 68 | char const *pszName;
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| 69 | /** The master volume of this mixer. */
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| 70 | PDMAUDIOVOLUME VolMaster;
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| 71 | /** List of audio mixer sinks (AUDMIXSINK). */
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| 72 | RTLISTANCHOR lstSinks;
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| 73 | /** Number of used audio sinks. */
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| 74 | uint8_t cSinks;
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| 75 | /** Mixer flags. See AUDMIXER_FLAGS_XXX. */
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| 76 | uint32_t fFlags;
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| 77 | /** The mixer's critical section. */
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| 78 | RTCRITSECT CritSect;
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| 79 | } AUDIOMIXER;
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| 80 | /** Pointer to an audio mixer instance. */
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| 81 | typedef AUDIOMIXER *PAUDIOMIXER;
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| 82 |
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| 83 | /** Value for AUDIOMIXER::uMagic. (Attilio Joseph "Teo" Macero) */
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| 84 | #define AUDIOMIXER_MAGIC UINT32_C(0x19251030)
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| 85 | /** Value for AUDIOMIXER::uMagic after destruction. */
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| 86 | #define AUDIOMIXER_MAGIC_DEAD UINT32_C(0x20080219)
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| 87 |
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| 88 | /** @name AUDMIXER_FLAGS_XXX - For AudioMixerCreate().
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| 89 | * @{ */
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| 90 | /** No mixer flags specified. */
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| 91 | #define AUDMIXER_FLAGS_NONE 0
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| 92 | /** Debug mode enabled.
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| 93 | * This writes .WAV file to the host, usually to the temporary directory. */
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| 94 | #define AUDMIXER_FLAGS_DEBUG RT_BIT(0)
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| 95 | /** Validation mask. */
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| 96 | #define AUDMIXER_FLAGS_VALID_MASK UINT32_C(0x00000001)
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| 97 | /** @} */
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| 98 |
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| 99 |
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| 100 | /**
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| 101 | * Audio mixer stream.
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| 102 | */
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| 103 | typedef struct AUDMIXSTREAM
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| 104 | {
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| 105 | /** List entry on AUDMIXSINK::lstStreams. */
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| 106 | RTLISTNODE Node;
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| 107 | /** Magic value (AUDMIXSTREAM_MAGIC). */
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| 108 | uint32_t uMagic;
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| 109 | /** The backend buffer size in frames (for draining deadline calc). */
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| 110 | uint32_t cFramesBackendBuffer;
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| 111 | /** Stream status of type AUDMIXSTREAM_STATUS_. */
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| 112 | uint32_t fStatus;
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| 113 | /** Number of writable/readable frames the last time we checked. */
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| 114 | uint32_t cFramesLastAvail;
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| 115 | /** Set if the stream has been found unreliable wrt. consuming/producing
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| 116 | * samples, and that we shouldn't consider it when deciding how much to move
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| 117 | * from the mixer buffer and to the drivers. */
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| 118 | bool fUnreliable;
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| 119 | /** Name of this stream. */
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| 120 | char *pszName;
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| 121 | /** The statistics prefix. */
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| 122 | char *pszStatPrefix;
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| 123 | /** Sink this stream is attached to. */
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| 124 | PAUDMIXSINK pSink;
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| 125 | /** Pointer to audio connector being used. */
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| 126 | PPDMIAUDIOCONNECTOR pConn;
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| 127 | /** Pointer to PDM audio stream this mixer stream handles. */
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| 128 | PPDMAUDIOSTREAM pStream;
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| 129 | union
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| 130 | {
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| 131 | /** Output: Mixing buffer peeking state & config. */
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| 132 | AUDIOMIXBUFPEEKSTATE PeekState;
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| 133 | /** Input: Mixing buffer writing state & config. */
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| 134 | AUDIOMIXBUFWRITESTATE WriteState;
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| 135 | };
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| 136 | /** Last read (recording) / written (playback) timestamp (in ns). */
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| 137 | uint64_t tsLastReadWrittenNs;
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| 138 | /** The streams's critical section. */
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| 139 | RTCRITSECT CritSect;
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| 140 | } AUDMIXSTREAM;
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| 141 | /** Pointer to an audio mixer stream. */
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| 142 | typedef AUDMIXSTREAM *PAUDMIXSTREAM;
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| 143 |
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| 144 | /** Value for AUDMIXSTREAM::uMagic. (Jan Erik Kongshaug) */
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| 145 | #define AUDMIXSTREAM_MAGIC UINT32_C(0x19440704)
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| 146 | /** Value for AUDMIXSTREAM::uMagic after destruction. */
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| 147 | #define AUDMIXSTREAM_MAGIC_DEAD UINT32_C(0x20191105)
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| 148 |
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| 149 |
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| 150 | /** @name AUDMIXSTREAM_STATUS_XXX - mixer stream status.
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| 151 | * (This is a destilled version of PDMAUDIOSTREAM_STS_XXX.)
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| 152 | * @{ */
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| 153 | /** No status set. */
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| 154 | #define AUDMIXSTREAM_STATUS_NONE UINT32_C(0)
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| 155 | /** The mixing stream is enabled (active). */
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| 156 | #define AUDMIXSTREAM_STATUS_ENABLED RT_BIT_32(0)
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| 157 | /** The mixing stream can be read from.
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| 158 | * Always set together with AUDMIXSTREAM_STATUS_ENABLED. */
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| 159 | #define AUDMIXSTREAM_STATUS_CAN_READ RT_BIT_32(1)
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| 160 | /** The mixing stream can be written to.
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| 161 | * Always set together with AUDMIXSTREAM_STATUS_ENABLED. */
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| 162 | #define AUDMIXSTREAM_STATUS_CAN_WRITE RT_BIT_32(2)
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| 163 | /** @} */
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| 164 |
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| 165 |
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| 166 | /** Callback for an asynchronous I/O update job. */
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| 167 | typedef DECLCALLBACKTYPE(void, FNAUDMIXSINKUPDATE,(PPDMDEVINS pDevIns, PAUDMIXSINK pSink, void *pvUser));
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| 168 | /** Pointer to a callback for an asynchronous I/O update job. */
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| 169 | typedef FNAUDMIXSINKUPDATE *PFNAUDMIXSINKUPDATE;
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| 170 |
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| 171 | /**
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| 172 | * Audio mixer sink.
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| 173 | */
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| 174 | typedef struct AUDMIXSINK
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| 175 | {
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| 176 | /** List entry on AUDIOMIXER::lstSinks. */
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| 177 | RTLISTNODE Node;
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| 178 | /** Magic value (AUDMIXSINK_MAGIC). */
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| 179 | uint32_t uMagic;
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| 180 | /** The sink direction (either PDMAUDIODIR_IN or PDMAUDIODIR_OUT). */
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| 181 | PDMAUDIODIR enmDir;
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| 182 | /** Pointer to mixer object this sink is bound to. */
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| 183 | PAUDIOMIXER pParent;
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| 184 | /** Name of this sink (allocated after this structure). */
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| 185 | char const *pszName;
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| 186 | /** The sink's PCM format (i.e. the guest device side). */
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| 187 | PDMAUDIOPCMPROPS PCMProps;
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| 188 | /** Sink status bits - AUDMIXSINK_STS_XXX. */
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| 189 | uint32_t fStatus;
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| 190 | /** Number of bytes to be transferred from the device DMA buffer before the
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| 191 | * streams will be put into draining mode. */
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| 192 | uint32_t cbDmaLeftToDrain;
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| 193 | /** The deadline for draining if it's pending. */
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| 194 | uint64_t nsDrainDeadline;
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| 195 | /** When the draining startet (for logging). */
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| 196 | uint64_t nsDrainStarted;
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| 197 | /** Number of streams assigned. */
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| 198 | uint8_t cStreams;
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| 199 | /** List of assigned streams (AUDMIXSTREAM).
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| 200 | * @note All streams have the same PCM properties, so the mixer does not do
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| 201 | * any conversion. bird: That is *NOT* true any more, the mixer has
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| 202 | * encoders/decoder states for each stream (well, input is still a todo).
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| 203 | *
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| 204 | * @todo Use something faster -- vector maybe? bird: It won't be faster. You
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| 205 | * will have a vector of stream pointers (because you cannot have a vector
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| 206 | * of full AUDMIXSTREAM structures since they'll move when the vector is
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| 207 | * reallocated and we need pointers to them to give out to devices), which
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| 208 | * is the same cost as going via Node.pNext/pPrev. */
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| 209 | RTLISTANCHOR lstStreams;
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| 210 | /** The volume of this sink. The volume always will
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| 211 | * be combined with the mixer's master volume. */
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| 212 | PDMAUDIOVOLUME Volume;
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| 213 | /** The volume of this sink, combined with the last set master volume. */
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| 214 | PDMAUDIOVOLUME VolumeCombined;
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| 215 | /** Timestamp since last update (in ms). */
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| 216 | uint64_t tsLastUpdatedMs;
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| 217 | /** Last read (recording) / written (playback) timestamp (in ns). */
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| 218 | uint64_t tsLastReadWrittenNs;
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| 219 | /** Union for input/output specifics. */
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| 220 | union
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| 221 | {
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| 222 | struct
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| 223 | {
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| 224 | /** The sink's peek state. */
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| 225 | AUDIOMIXBUFPEEKSTATE State;
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| 226 | } In;
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| 227 | struct
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| 228 | {
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| 229 | /** The sink's write state. */
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| 230 | AUDIOMIXBUFWRITESTATE State;
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| 231 | } Out;
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| 232 | };
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| 233 | struct
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| 234 | {
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| 235 | PAUDIOHLPFILE pFile;
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| 236 | } Dbg;
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| 237 | /** This sink's mixing buffer. */
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| 238 | AUDIOMIXBUF MixBuf;
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| 239 | /** Asynchronous I/O thread related stuff. */
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| 240 | struct
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| 241 | {
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| 242 | /** The thread handle, NIL_RTTHREAD if not active. */
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| 243 | RTTHREAD hThread;
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| 244 | /** Event for letting the thread know there is some data to process. */
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| 245 | RTSEMEVENT hEvent;
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| 246 | /** The device instance (same for all update jobs). */
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| 247 | PPDMDEVINS pDevIns;
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| 248 | /** Started indicator. */
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| 249 | volatile bool fStarted;
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| 250 | /** Shutdown indicator. */
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| 251 | volatile bool fShutdown;
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| 252 | /** Number of update jobs this sink has (usually zero or one). */
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| 253 | uint8_t cUpdateJobs;
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| 254 | /** The minimum typical interval for all jobs. */
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| 255 | uint32_t cMsMinTypicalInterval;
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| 256 | /** Update jobs for this sink. */
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| 257 | struct
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| 258 | {
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| 259 | /** User specific argument. */
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| 260 | void *pvUser;
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| 261 | /** The callback. */
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| 262 | PFNAUDMIXSINKUPDATE pfnUpdate;
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| 263 | /** Typical interval in milliseconds. */
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| 264 | uint32_t cMsTypicalInterval;
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| 265 | } aUpdateJobs[8];
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| 266 | } AIO;
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| 267 | /** The sink's critical section. */
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| 268 | RTCRITSECT CritSect;
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| 269 | } AUDMIXSINK;
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| 270 |
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| 271 | /** Value for AUDMIXSINK::uMagic. (Sir George Martin) */
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| 272 | #define AUDMIXSINK_MAGIC UINT32_C(0x19260103)
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| 273 | /** Value for AUDMIXSINK::uMagic after destruction. */
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| 274 | #define AUDMIXSINK_MAGIC_DEAD UINT32_C(0x20160308)
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| 275 |
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| 276 |
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| 277 | /** @name AUDMIXSINK_STS_XXX - Sink status bits.
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| 278 | * @{ */
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| 279 | /** No status specified. */
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| 280 | #define AUDMIXSINK_STS_NONE 0
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| 281 | /** The sink is active and running. */
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| 282 | #define AUDMIXSINK_STS_RUNNING RT_BIT(0)
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| 283 | /** Draining the buffers and pending stop - output only. */
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| 284 | #define AUDMIXSINK_STS_DRAINING RT_BIT(1)
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| 285 | /** Drained the DMA buffer. */
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| 286 | #define AUDMIXSINK_STS_DRAINED_DMA RT_BIT(2)
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| 287 | /** Drained the mixer buffer, only waiting for streams (drivers) now. */
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| 288 | #define AUDMIXSINK_STS_DRAINED_MIXBUF RT_BIT(3)
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| 289 | /** Dirty flag.
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| 290 | * - For output sinks this means that there is data in the sink which has not
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| 291 | * been played yet.
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| 292 | * - For input sinks this means that there is data in the sink which has been
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| 293 | * recorded but not transferred to the destination yet.
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| 294 | * @todo This isn't used for *anything* at the moment. Remove? */
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| 295 | #define AUDMIXSINK_STS_DIRTY RT_BIT(4)
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| 296 | /** @} */
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| 297 |
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| 298 |
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| 299 | /** @name Audio mixer methods
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| 300 | * @{ */
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| 301 | int AudioMixerCreate(const char *pszName, uint32_t fFlags, PAUDIOMIXER *ppMixer);
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| 302 | void AudioMixerDestroy(PAUDIOMIXER pMixer, PPDMDEVINS pDevIns);
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| 303 | void AudioMixerDebug(PAUDIOMIXER pMixer, PCDBGFINFOHLP pHlp, const char *pszArgs);
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| 304 | int AudioMixerSetMasterVolume(PAUDIOMIXER pMixer, PCPDMAUDIOVOLUME pVol);
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| 305 | int AudioMixerCreateSink(PAUDIOMIXER pMixer, const char *pszName, PDMAUDIODIR enmDir, PPDMDEVINS pDevIns, PAUDMIXSINK *ppSink);
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| 306 | /** @} */
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| 307 |
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| 308 | /** @name Audio mixer sink methods
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| 309 | * @{ */
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| 310 | int AudioMixerSinkStart(PAUDMIXSINK pSink);
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| 311 | int AudioMixerSinkDrainAndStop(PAUDMIXSINK pSink, uint32_t cbComming);
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| 312 | void AudioMixerSinkDestroy(PAUDMIXSINK pSink, PPDMDEVINS pDevIns);
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| 313 | uint32_t AudioMixerSinkGetReadable(PAUDMIXSINK pSink);
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| 314 | uint32_t AudioMixerSinkGetWritable(PAUDMIXSINK pSink);
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| 315 | PDMAUDIODIR AudioMixerSinkGetDir(PCAUDMIXSINK pSink);
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| 316 | uint32_t AudioMixerSinkGetStatus(PAUDMIXSINK pSink);
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| 317 | bool AudioMixerSinkIsActive(PAUDMIXSINK pSink);
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| 318 | void AudioMixerSinkReset(PAUDMIXSINK pSink);
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| 319 | int AudioMixerSinkSetFormat(PAUDMIXSINK pSink, PCPDMAUDIOPCMPROPS pPCMProps, uint32_t cMsSchedulingHint);
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| 320 | int AudioMixerSinkSetVolume(PAUDMIXSINK pSink, PCPDMAUDIOVOLUME pVol);
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| 321 | int AudioMixerSinkUpdate(PAUDMIXSINK pSink, uint32_t cbDmaUsed, uint32_t cbDmaPeriod);
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| 322 |
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| 323 | int AudioMixerSinkAddUpdateJob(PAUDMIXSINK pSink, PFNAUDMIXSINKUPDATE pfnUpdate, void *pvUser, uint32_t cMsTypicalInterval);
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| 324 | int AudioMixerSinkRemoveUpdateJob(PAUDMIXSINK pSink, PFNAUDMIXSINKUPDATE pfnUpdate, void *pvUser);
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| 325 | int AudioMixerSinkSignalUpdateJob(PAUDMIXSINK pSink);
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| 326 | uint64_t AudioMixerSinkTransferFromCircBuf(PAUDMIXSINK pSink, PRTCIRCBUF pCircBuf, uint64_t offStream,
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| 327 | uint32_t idStream, PAUDIOHLPFILE pDbgFile);
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| 328 | uint64_t AudioMixerSinkTransferToCircBuf(PAUDMIXSINK pSink, PRTCIRCBUF pCircBuf, uint64_t offStream,
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| 329 | uint32_t idStream, PAUDIOHLPFILE pDbgFile);
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| 330 | bool AudioMixerSinkLockIsOwner(PAUDMIXSINK pSink);
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| 331 | int AudioMixerSinkLock(PAUDMIXSINK pSink);
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| 332 | int AudioMixerSinkTryLock(PAUDMIXSINK pSink);
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| 333 | int AudioMixerSinkUnlock(PAUDMIXSINK pSink);
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| 334 |
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| 335 | int AudioMixerSinkCreateStream(PAUDMIXSINK pSink, PPDMIAUDIOCONNECTOR pConnector, PCPDMAUDIOSTREAMCFG pCfg,
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| 336 | PPDMDEVINS pDevIns, PAUDMIXSTREAM *ppStream);
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| 337 | int AudioMixerSinkAddStream(PAUDMIXSINK pSink, PAUDMIXSTREAM pStream);
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| 338 | void AudioMixerSinkRemoveStream(PAUDMIXSINK pSink, PAUDMIXSTREAM pStream);
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| 339 | void AudioMixerSinkRemoveAllStreams(PAUDMIXSINK pSink);
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| 340 | /** @} */
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| 341 |
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| 342 | /** @name Audio mixer stream methods
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| 343 | * @{ */
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| 344 | void AudioMixerStreamDestroy(PAUDMIXSTREAM pStream, PPDMDEVINS pDevIns, bool fImmediate);
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| 345 | /** @} */
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| 346 |
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| 347 | /** @} */
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| 348 |
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| 349 | #endif /* !VBOX_INCLUDED_SRC_Audio_AudioMixer_h */
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| 350 |
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