VirtualBox

source: vbox/trunk/src/VBox/Devices/Audio/HDAStreamMap.cpp@ 68253

Last change on this file since 68253 was 67698, checked in by vboxsync, 7 years ago

Audio/HDA: Split out StreamMap and StreamChannel functions in own files for easier maintenance.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 4.1 KB
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1/* $Id: HDAStreamMap.cpp 67698 2017-06-29 13:58:29Z vboxsync $ */
2/** @file
3 * HDAStreamMap.cpp - Stream mapping functions for HD Audio.
4 */
5
6/*
7 * Copyright (C) 2017 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18/*********************************************************************************************************************************
19* Header Files *
20*********************************************************************************************************************************/
21#define LOG_GROUP LOG_GROUP_DEV_HDA
22#include <VBox/log.h>
23
24#include <iprt/mem.h>
25
26#include <VBox/vmm/pdmdev.h>
27#include <VBox/vmm/pdmaudioifs.h>
28
29#include "DrvAudio.h"
30
31#include "HDAStreamChannel.h"
32#include "HDAStreamMap.h"
33
34#ifdef IN_RING3
35/**
36 * Initializes a stream mapping structure according to the given PCM properties.
37 *
38 * @return IPRT status code.
39 * @param pMapping Pointer to mapping to initialize.
40 * @param pProps Pointer to PCM properties to use for initialization.
41 */
42int hdaStreamMapInit(PHDASTREAMMAPPING pMapping, PPDMAUDIOPCMPROPS pProps)
43{
44 AssertPtrReturn(pMapping, VERR_INVALID_POINTER);
45 AssertPtrReturn(pProps, VERR_INVALID_POINTER);
46
47 if (!DrvAudioHlpPCMPropsAreValid(pProps))
48 return VERR_INVALID_PARAMETER;
49
50 hdaStreamMapReset(pMapping);
51
52 pMapping->paChannels = (PPDMAUDIOSTREAMCHANNEL)RTMemAlloc(sizeof(PDMAUDIOSTREAMCHANNEL) * pProps->cChannels);
53 if (!pMapping->paChannels)
54 return VERR_NO_MEMORY;
55
56 int rc = VINF_SUCCESS;
57
58 Assert(RT_IS_POWER_OF_TWO(pProps->cBits));
59
60 /** @todo We assume all channels in a stream have the same format. */
61 PPDMAUDIOSTREAMCHANNEL pChan = pMapping->paChannels;
62 for (uint8_t i = 0; i < pProps->cChannels; i++)
63 {
64 pChan->uChannel = i;
65 pChan->cbStep = (pProps->cBits / 2);
66 pChan->cbFrame = pChan->cbStep * pProps->cChannels;
67 pChan->cbFirst = i * pChan->cbStep;
68 pChan->cbOff = pChan->cbFirst;
69
70 int rc2 = hdaStreamChannelDataInit(&pChan->Data, PDMAUDIOSTREAMCHANNELDATA_FLAG_NONE);
71 if (RT_SUCCESS(rc))
72 rc = rc2;
73
74 if (RT_FAILURE(rc))
75 break;
76
77 pChan++;
78 }
79
80 if ( RT_SUCCESS(rc)
81 /* Create circular buffer if not created yet. */
82 && !pMapping->pCircBuf)
83 {
84 rc = RTCircBufCreate(&pMapping->pCircBuf, _4K); /** @todo Make size configurable? */
85 }
86
87 if (RT_SUCCESS(rc))
88 {
89 pMapping->cChannels = pProps->cChannels;
90#ifdef VBOX_WITH_HDA_AUDIO_INTERLEAVING_STREAMS_SUPPORT
91 pMapping->enmLayout = PDMAUDIOSTREAMLAYOUT_INTERLEAVED;
92#else
93 pMapping->enmLayout = PDMAUDIOSTREAMLAYOUT_NON_INTERLEAVED;
94#endif
95 }
96
97 return rc;
98}
99
100
101/**
102 * Destroys a given stream mapping.
103 *
104 * @param pMapping Pointer to mapping to destroy.
105 */
106void hdaStreamMapDestroy(PHDASTREAMMAPPING pMapping)
107{
108 hdaStreamMapReset(pMapping);
109
110 if (pMapping->pCircBuf)
111 {
112 RTCircBufDestroy(pMapping->pCircBuf);
113 pMapping->pCircBuf = NULL;
114 }
115}
116
117
118/**
119 * Resets a given stream mapping.
120 *
121 * @param pMapping Pointer to mapping to reset.
122 */
123void hdaStreamMapReset(PHDASTREAMMAPPING pMapping)
124{
125 AssertPtrReturnVoid(pMapping);
126
127 pMapping->enmLayout = PDMAUDIOSTREAMLAYOUT_UNKNOWN;
128
129 if (pMapping->cChannels)
130 {
131 for (uint8_t i = 0; i < pMapping->cChannels; i++)
132 hdaStreamChannelDataDestroy(&pMapping->paChannels[i].Data);
133
134 AssertPtr(pMapping->paChannels);
135 RTMemFree(pMapping->paChannels);
136 pMapping->paChannels = NULL;
137
138 pMapping->cChannels = 0;
139 }
140}
141#endif /* IN_RING3 */
142
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