| 1 | /* $Id: AudioMixBuffer.h 89314 2021-05-27 11:33:04Z vboxsync $ */
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| 2 | /** @file
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| 3 | * Audio Mixing bufer convert audio samples to/from different rates / formats.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2014-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef VBOX_INCLUDED_SRC_Audio_AudioMixBuffer_h
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| 19 | #define VBOX_INCLUDED_SRC_Audio_AudioMixBuffer_h
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| 20 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 21 | # pragma once
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| 22 | #endif
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| 23 |
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| 24 | #include <iprt/cdefs.h>
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| 25 | #include <VBox/vmm/pdmaudioifs.h>
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| 26 |
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| 27 |
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| 28 | /**
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| 29 | * Rate processing information of a source & destination audio stream.
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| 30 | *
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| 31 | * This is needed because both streams can differ regarding their rates and
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| 32 | * therefore need to be treated accordingly.
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| 33 | */
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| 34 | typedef struct AUDIOSTREAMRATE
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| 35 | {
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| 36 | /** Current (absolute) offset in the output (destination) stream.
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| 37 | * @todo r=bird: Please reveal which unit these members are given in. */
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| 38 | uint64_t offDst;
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| 39 | /** Increment for moving offDst for the destination stream.
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| 40 | * This is needed because the source <-> destination rate might be different. */
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| 41 | uint64_t uDstInc;
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| 42 | /** Current (absolute) offset in the input stream. */
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| 43 | uint32_t offSrc;
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| 44 | /** Set if no conversion is necessary. */
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| 45 | bool fNoConversionNeeded;
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| 46 | bool afPadding[3];
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| 47 |
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| 48 | /** Last processed frame of the input stream.
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| 49 | * Needed for interpolation. */
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| 50 | union
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| 51 | {
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| 52 | int64_t ai64Samples[2];
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| 53 | PDMAUDIOFRAME Frame;
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| 54 | } SrcLast;
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| 55 |
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| 56 | /**
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| 57 | * Resampling function.
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| 58 | * @returns Number of destination frames written.
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| 59 | */
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| 60 | DECLR3CALLBACKMEMBER(uint32_t, pfnResample, (int64_t *pi64Dst, uint32_t cDstFrames,
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| 61 | int64_t const *pi64Src, uint32_t cSrcFrames, uint32_t *pcSrcFramesRead,
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| 62 | struct AUDIOSTREAMRATE *pRate));
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| 63 |
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| 64 | } AUDIOSTREAMRATE;
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| 65 | /** Pointer to rate processing information of a stream. */
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| 66 | typedef AUDIOSTREAMRATE *PAUDIOSTREAMRATE;
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| 67 |
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| 68 | /**
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| 69 | * Mixing buffer volume parameters.
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| 70 | *
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| 71 | * The volume values are in fixed point style and must be converted to/from
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| 72 | * before using with e.g. PDMAUDIOVOLUME.
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| 73 | */
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| 74 | typedef struct AUDMIXBUFVOL
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| 75 | {
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| 76 | /** Set to @c true if this stream is muted, @c false if not. */
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| 77 | bool fMuted;
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| 78 | /** Left volume to apply during conversion.
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| 79 | * Pass 0 to convert the original values. May not apply to all conversion functions. */
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| 80 | uint32_t uLeft;
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| 81 | /** Right volume to apply during conversion.
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| 82 | * Pass 0 to convert the original values. May not apply to all conversion functions. */
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| 83 | uint32_t uRight;
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| 84 | } AUDMIXBUFVOL;
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| 85 | /** Pointer to mixing buffer volument parameters. */
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| 86 | typedef AUDMIXBUFVOL *PAUDMIXBUFVOL;
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| 87 |
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| 88 | /*
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| 89 | * Frame conversion parameters for the audioMixBufConvFromXXX / audioMixBufConvToXXX functions.
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| 90 | */
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| 91 | typedef struct AUDMIXBUFCONVOPTS
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| 92 | {
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| 93 | /** Number of audio frames to convert. */
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| 94 | uint32_t cFrames;
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| 95 | union
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| 96 | {
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| 97 | struct
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| 98 | {
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| 99 | /** Volume to use for conversion. */
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| 100 | AUDMIXBUFVOL Volume;
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| 101 | } From;
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| 102 | } RT_UNION_NM(u);
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| 103 | } AUDMIXBUFCONVOPTS;
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| 104 | /** Pointer to conversion parameters for the audio mixer. */
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| 105 | typedef AUDMIXBUFCONVOPTS *PAUDMIXBUFCONVOPTS;
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| 106 | /** Pointer to const conversion parameters for the audio mixer. */
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| 107 | typedef AUDMIXBUFCONVOPTS const *PCAUDMIXBUFCONVOPTS;
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| 108 |
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| 109 | /**
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| 110 | * @note All internal handling is done in audio frames, not in bytes!
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| 111 | * @todo r=bird: What does this note actually apply to?
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| 112 | */
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| 113 | typedef uint32_t AUDIOMIXBUFFMT;
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| 114 | typedef AUDIOMIXBUFFMT *PAUDIOMIXBUFFMT;
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| 115 |
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| 116 | /**
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| 117 | * Convertion-from function used by the audio buffer mixer.
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| 118 | *
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| 119 | * @returns Number of audio frames returned.
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| 120 | * @param paDst Where to return the converted frames.
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| 121 | * @param pvSrc The source frame bytes.
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| 122 | * @param cbSrc Number of bytes to convert.
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| 123 | * @param pOpts Conversion options.
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| 124 | * @todo r=bird: The @a paDst size is presumable given in @a pOpts->cFrames?
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| 125 | */
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| 126 | typedef DECLCALLBACKTYPE(uint32_t, FNAUDIOMIXBUFCONVFROM,(PPDMAUDIOFRAME paDst, const void *pvSrc, uint32_t cbSrc,
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| 127 | PCAUDMIXBUFCONVOPTS pOpts));
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| 128 | /** Pointer to a convertion-from function used by the audio buffer mixer. */
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| 129 | typedef FNAUDIOMIXBUFCONVFROM *PFNAUDIOMIXBUFCONVFROM;
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| 130 |
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| 131 | /**
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| 132 | * Convertion-to function used by the audio buffer mixer.
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| 133 | *
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| 134 | * @param pvDst Output buffer.
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| 135 | * @param paSrc The input frames.
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| 136 | * @param pOpts Conversion options.
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| 137 | * @todo r=bird: The @a paSrc size is presumable given in @a pOpts->cFrames and
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| 138 | * this implicitly gives the pvDst size too, right?
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| 139 | */
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| 140 | typedef DECLCALLBACKTYPE(void, FNAUDIOMIXBUFCONVTO,(void *pvDst, PCPDMAUDIOFRAME paSrc, PCAUDMIXBUFCONVOPTS pOpts));
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| 141 | /** Pointer to a convertion-to function used by the audio buffer mixer. */
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| 142 | typedef FNAUDIOMIXBUFCONVTO *PFNAUDIOMIXBUFCONVTO;
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| 143 |
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| 144 | /** Pointer to audio mixing buffer. */
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| 145 | typedef struct AUDIOMIXBUF *PAUDIOMIXBUF;
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| 146 | /** Pointer to a const audio mixing buffer. */
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| 147 | typedef struct AUDIOMIXBUF const *PCAUDIOMIXBUF;
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| 148 |
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| 149 |
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| 150 | /**
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| 151 | * State & config for AudioMixBufPeek created by AudioMixBufInitPeekState.
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| 152 | */
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| 153 | typedef struct AUDIOMIXBUFPEEKSTATE
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| 154 | {
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| 155 | /** Encodes @a cFrames from @a paSrc to @a pvDst. */
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| 156 | DECLR3CALLBACKMEMBER(void, pfnEncode,(void *pvDst, int64_t const *paSrc, uint32_t cFrames, struct AUDIOMIXBUFPEEKSTATE *pState));
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| 157 | /** Sample rate conversion state (only used when needed). */
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| 158 | AUDIOSTREAMRATE Rate;
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| 159 | /** Source (mixer) channels. */
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| 160 | uint8_t cSrcChannels;
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| 161 | /** Destination channels. */
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| 162 | uint8_t cDstChannels;
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| 163 | /** Destination frame size. */
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| 164 | uint8_t cbDstFrame;
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| 165 | } AUDIOMIXBUFPEEKSTATE;
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| 166 | /** Pointer to peek state & config. */
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| 167 | typedef AUDIOMIXBUFPEEKSTATE *PAUDIOMIXBUFPEEKSTATE;
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| 168 |
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| 169 |
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| 170 | /**
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| 171 | * State & config for AudioMixBufWrite, AudioMixBufSilence, AudioMixBufBlend and
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| 172 | * AudioMixBufBlendGap, created by AudioMixBufInitWriteState.
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| 173 | */
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| 174 | typedef struct AUDIOMIXBUFWRITESTATE
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| 175 | {
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| 176 | /** Encodes @a cFrames from @a pvSrc to @a paDst. */
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| 177 | DECLR3CALLBACKMEMBER(void, pfnDecode,(int64_t *paDst, const void *pvSrc, uint32_t cFrames, struct AUDIOMIXBUFWRITESTATE *pState));
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| 178 | /** Encodes @a cFrames from @a pvSrc blending into @a paDst. */
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| 179 | DECLR3CALLBACKMEMBER(void, pfnDecodeBlend,(int64_t *paDst, const void *pvSrc, uint32_t cFrames, struct AUDIOMIXBUFWRITESTATE *pState));
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| 180 | /** Sample rate conversion state (only used when needed). */
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| 181 | AUDIOSTREAMRATE Rate;
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| 182 | /** Destination (mixer) channels. */
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| 183 | uint8_t cDstChannels;
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| 184 | /** Source hannels. */
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| 185 | uint8_t cSrcChannels;
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| 186 | /** Source frame size. */
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| 187 | uint8_t cbSrcFrame;
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| 188 | } AUDIOMIXBUFWRITESTATE;
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| 189 | /** Pointer to write state & config. */
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| 190 | typedef AUDIOMIXBUFWRITESTATE *PAUDIOMIXBUFWRITESTATE;
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| 191 |
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| 192 |
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| 193 | /**
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| 194 | * Audio mixing buffer.
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| 195 | */
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| 196 | typedef struct AUDIOMIXBUF
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| 197 | {
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| 198 | /** Magic value (AUDIOMIXBUF_MAGIC). */
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| 199 | uint32_t uMagic;
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| 200 | uint8_t abPadding[4];
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| 201 | /* ???Undocumented??? */
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| 202 | RTLISTNODE Node;
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| 203 | /** Name of the buffer. */
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| 204 | char *pszName;
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| 205 | /** Frame buffer. */
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| 206 | PPDMAUDIOFRAME pFrames;
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| 207 | /** Size of the frame buffer (in audio frames). */
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| 208 | uint32_t cFrames;
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| 209 | /** The current read position (in frames). */
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| 210 | uint32_t offRead;
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| 211 | /** The current write position (in frames). */
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| 212 | uint32_t offWrite;
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| 213 | /** Total frames already mixed down to the parent buffer (if any).
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| 214 | *
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| 215 | * Always starting at the parent's offRead position.
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| 216 | * @note Count always is specified in parent frames, as the sample count can
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| 217 | * differ between parent and child. */
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| 218 | uint32_t cMixed;
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| 219 | /** How much audio frames are currently being used in this buffer.
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| 220 | * @note This also is known as the distance in ring buffer terms. */
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| 221 | uint32_t cUsed;
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| 222 | /** Number of children mix buffers kept in lstChildren. */
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| 223 | uint32_t cChildren;
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| 224 | /** List of children mix buffers to keep in sync with (if being a parent buffer). */
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| 225 | RTLISTANCHOR lstChildren;
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| 226 | /** Pointer to parent buffer (if any). */
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| 227 | PAUDIOMIXBUF pParent;
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| 228 | /** Intermediate structure for buffer conversion tasks. */
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| 229 | PAUDIOSTREAMRATE pRate;
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| 230 | /** Internal representation of current volume used for mixing. */
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| 231 | AUDMIXBUFVOL Volume;
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| 232 | /** This buffer's audio format.
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| 233 | * @todo r=bird: This seems to be a value created by AUDMIXBUF_AUDIO_FMT_MAKE(),
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| 234 | * which is not define here. Does this structure really belong here at
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| 235 | * all? */
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| 236 | AUDIOMIXBUFFMT uAudioFmt;
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| 237 | /** Audio input properties.
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| 238 | * @note There is only one set of audio properties here because we have one
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| 239 | * mixer buffer for the guest side and a separate one for the host side.
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| 240 | * @todo r=bird: Why exactly do we need to use separate mixer buffers?
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| 241 | * Couldn't we just have different conversion fuctions and save the
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| 242 | * extra copying? */
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| 243 | PDMAUDIOPCMPROPS Props;
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| 244 | /** Standard conversion-to function for set uAudioFmt. */
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| 245 | PFNAUDIOMIXBUFCONVTO pfnConvTo;
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| 246 | /** Standard conversion-from function for set uAudioFmt. */
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| 247 | PFNAUDIOMIXBUFCONVFROM pfnConvFrom;
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| 248 |
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| 249 | /** Ratio of the associated parent stream's frequency by this stream's
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| 250 | * frequency (1<<32), represented as a signed 64 bit integer.
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| 251 | *
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| 252 | * For example, if the parent stream has a frequency of 44 khZ, and this
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| 253 | * stream has a frequency of 11 kHz, the ration then would be
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| 254 | * (44/11 * (1 << 32)).
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| 255 | *
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| 256 | * Currently this does not get changed once assigned. */
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| 257 | int64_t iFreqRatio;
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| 258 | } AUDIOMIXBUF;
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| 259 |
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| 260 | /** Magic value for AUDIOMIXBUF (Antonio Lucio Vivaldi). */
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| 261 | #define AUDIOMIXBUF_MAGIC UINT32_C(0x16780304)
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| 262 | /** Dead mixer buffer magic. */
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| 263 | #define AUDIOMIXBUF_MAGIC_DEAD UINT32_C(0x17410728)
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| 264 |
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| 265 |
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| 266 | /** Constructs 32 bit value for given frequency, number of channels, bits per sample and signed bit.
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| 267 | * @note This currently matches 1:1 the VRDE encoding -- this might change in the future, so better don't rely on this fact! */
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| 268 | #define AUDMIXBUF_AUDIO_FMT_MAKE(freq, c, bps, s) ((((s) & 0x1) << 28) + (((bps) & 0xFF) << 20) + (((c) & 0xF) << 16) + ((freq) & 0xFFFF))
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| 269 |
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| 270 | /** Decodes frequency (Hz). */
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| 271 | #define AUDMIXBUF_FMT_SAMPLE_FREQ(a) ((a) & 0xFFFF)
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| 272 | /** Decodes number of channels. */
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| 273 | #define AUDMIXBUF_FMT_CHANNELS(a) (((a) >> 16) & 0xF)
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| 274 | /** Decodes signed bit. */
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| 275 | #define AUDMIXBUF_FMT_SIGNED(a) (((a) >> 28) & 0x1)
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| 276 | /** Decodes number of bits per sample. */
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| 277 | #define AUDMIXBUF_FMT_BITS_PER_SAMPLE(a) (((a) >> 20) & 0xFF)
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| 278 | /** Decodes number of bytes per sample. */
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| 279 | #define AUDMIXBUF_FMT_BYTES_PER_SAMPLE(a) ((AUDMIXBUF_AUDIO_FMT_BITS_PER_SAMPLE(a) + 7) / 8)
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| 280 |
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| 281 | /** Converts (audio) frames to bytes. */
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| 282 | #define AUDIOMIXBUF_F2B(a_pMixBuf, a_cFrames) PDMAUDIOPCMPROPS_F2B(&(a_pMixBuf)->Props, a_cFrames)
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| 283 | /** Converts bytes to (audio) frames.
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| 284 | * @note Does *not* take the conversion ratio into account. */
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| 285 | #define AUDIOMIXBUF_B2F(a_pMixBuf, a_cb) PDMAUDIOPCMPROPS_B2F(&(a_pMixBuf)->Props, a_cb)
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| 286 |
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| 287 | /** Converts frames to bytes, respecting the conversion ratio to
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| 288 | * a linked buffer. */
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| 289 | #define AUDIOMIXBUF_F2B_RATIO(a_pMixBuf, a_cFrames) AUDIOMIXBUF_F2B(a_pMixBuf, AUDIOMIXBUF_F2F_RATIO(a_pMixBuf, a_cFrames))
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| 290 | /** Converts number of frames according to the buffer's ratio.
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| 291 | * @todo r=bird: Why the *signed* cast? */
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| 292 | #define AUDIOMIXBUF_F2F_RATIO(a_pMixBuf, a_cFrames) (((int64_t)(a_cFrames) << 32) / (a_pMixBuf)->iFreqRatio)
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| 293 |
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| 294 |
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| 295 | int AudioMixBufInit(PAUDIOMIXBUF pMixBuf, const char *pszName, PCPDMAUDIOPCMPROPS pProps, uint32_t cFrames);
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| 296 | void AudioMixBufDestroy(PAUDIOMIXBUF pMixBuf);
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| 297 |
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| 298 | int AudioMixBufInitPeekState(PCAUDIOMIXBUF pMixBuf, PAUDIOMIXBUFPEEKSTATE pState, PCPDMAUDIOPCMPROPS pDstProps);
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| 299 | void AudioMixBufPeek(PCAUDIOMIXBUF pMixBuf, uint32_t offSrcFrame, uint32_t cMaxSrcFrames, uint32_t *pcSrcFramesPeeked,
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| 300 | PAUDIOMIXBUFPEEKSTATE pState, void *pvDst, uint32_t cbDst, uint32_t *pcbDstPeeked);
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| 301 | void AudioMixBufAdvance(PAUDIOMIXBUF pMixBuf, uint32_t cFrames);
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| 302 | void AudioMixBufDrop(PAUDIOMIXBUF pMixBuf);
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| 303 |
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| 304 | int AudioMixBufInitWriteState(PCAUDIOMIXBUF pMixBuf, PAUDIOMIXBUFWRITESTATE pState, PCPDMAUDIOPCMPROPS pSrcProps);
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| 305 | void AudioMixBufWrite(PAUDIOMIXBUF pMixBuf, PAUDIOMIXBUFWRITESTATE pState, const void *pvSrcBuf, uint32_t cbSrcBuf,
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| 306 | uint32_t offDstFrame, uint32_t cMaxDstFrames, uint32_t *pcDstFramesWritten);
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| 307 | void AudioMixBufSilence(PAUDIOMIXBUF pMixBuf, PAUDIOMIXBUFWRITESTATE pState, uint32_t offFrame, uint32_t cFrames);
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| 308 | void AudioMixBufBlend(PAUDIOMIXBUF pMixBuf, PAUDIOMIXBUFWRITESTATE pState, const void *pvSrcBuf, uint32_t cbSrcBuf,
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| 309 | uint32_t offDstFrame, uint32_t cMaxDstFrames, uint32_t *pcDstFramesBlended);
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| 310 | void AudioMixBufBlendGap(PAUDIOMIXBUF pMixBuf, PAUDIOMIXBUFWRITESTATE pState, uint32_t cFrames);
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| 311 | void AudioMixBufCommit(PAUDIOMIXBUF pMixBuf, uint32_t cFrames);
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| 312 |
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| 313 | void AudioMixBufClear(PAUDIOMIXBUF pMixBuf);
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| 314 | void AudioMixBufFinish(PAUDIOMIXBUF pMixBuf, uint32_t cFramesToClear);
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| 315 | uint32_t AudioMixBufFree(PAUDIOMIXBUF pMixBuf);
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| 316 | uint32_t AudioMixBufFreeBytes(PAUDIOMIXBUF pMixBuf);
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| 317 | bool AudioMixBufIsEmpty(PAUDIOMIXBUF pMixBuf);
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| 318 | int AudioMixBufLinkTo(PAUDIOMIXBUF pMixBuf, PAUDIOMIXBUF pParent);
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| 319 | uint32_t AudioMixBufLive(PAUDIOMIXBUF pMixBuf);
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| 320 | int AudioMixBufMixToParent(PAUDIOMIXBUF pMixBuf, uint32_t cSrcFrames, uint32_t *pcSrcMixed);
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| 321 | int AudioMixBufMixToParentEx(PAUDIOMIXBUF pMixBuf, uint32_t cSrcOffset, uint32_t cSrcFrames, uint32_t *pcSrcMixed);
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| 322 | int AudioMixBufPeekMutable(PAUDIOMIXBUF pMixBuf, uint32_t cFramesToRead, PPDMAUDIOFRAME *ppvSamples, uint32_t *pcFramesRead);
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| 323 | uint32_t AudioMixBufUsed(PAUDIOMIXBUF pMixBuf);
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| 324 | uint32_t AudioMixBufUsedBytes(PAUDIOMIXBUF pMixBuf);
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| 325 | int AudioMixBufAcquireReadBlock(PAUDIOMIXBUF pMixBuf, void *pvBuf, uint32_t cbBuf, uint32_t *pcAcquiredFrames);
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| 326 | int AudioMixBufAcquireReadBlockEx(PAUDIOMIXBUF pMixBuf, PCPDMAUDIOPCMPROPS pDstProps,
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| 327 | void *pvBuf, uint32_t cbBuf, uint32_t *pcAcquiredFrames);
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| 328 | void AudioMixBufReleaseReadBlock(PAUDIOMIXBUF pMixBuf, uint32_t cFrames);
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| 329 | uint32_t AudioMixBufReadPos(PAUDIOMIXBUF pMixBuf);
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| 330 | void AudioMixBufReset(PAUDIOMIXBUF pMixBuf);
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| 331 | void AudioMixBufSetVolume(PAUDIOMIXBUF pMixBuf, PCPDMAUDIOVOLUME pVol);
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| 332 | uint32_t AudioMixBufSize(PAUDIOMIXBUF pMixBuf);
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| 333 | uint32_t AudioMixBufSizeBytes(PAUDIOMIXBUF pMixBuf);
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| 334 | void AudioMixBufUnlink(PAUDIOMIXBUF pMixBuf);
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| 335 | int AudioMixBufWriteAt(PAUDIOMIXBUF pMixBuf, uint32_t offSamples, const void *pvBuf, uint32_t cbBuf, uint32_t *pcWritten);
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| 336 | int AudioMixBufWriteAtEx(PAUDIOMIXBUF pMixBuf, PCPDMAUDIOPCMPROPS pSrcProps, uint32_t offFrames,
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| 337 | const void *pvBuf, uint32_t cbBuf, uint32_t *pcWritten);
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| 338 | int AudioMixBufWriteCirc(PAUDIOMIXBUF pMixBuf, const void *pvBuf, uint32_t cbBuf, uint32_t *pcWritten);
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| 339 | int AudioMixBufWriteCircEx(PAUDIOMIXBUF pMixBuf, PCPDMAUDIOPCMPROPS pSrcProps,
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| 340 | const void *pvBuf,uint32_t cbBuf, uint32_t *pcWritten);
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| 341 | uint32_t AudioMixBufWritePos(PAUDIOMIXBUF pMixBuf);
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| 342 |
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| 343 | #ifdef DEBUG
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| 344 | void AudioMixBufDbgPrint(PAUDIOMIXBUF pMixBuf);
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| 345 | void AudioMixBufDbgPrintChain(PAUDIOMIXBUF pMixBuf);
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| 346 | #endif
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| 347 |
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| 348 | #endif /* !VBOX_INCLUDED_SRC_Audio_AudioMixBuffer_h */
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| 349 |
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