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/* $Id: HDAStreamMap.cpp $ */
/** @file
* HDAStreamMap.cpp - Stream mapping functions for HD Audio.
*/
/*
* Copyright (C) 2017-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DEV_HDA
#include <VBox/log.h>
#include <iprt/mem.h>
#include <VBox/vmm/pdmdev.h>
#include <VBox/vmm/pdmaudioifs.h>
#include "DrvAudio.h"
#include "HDAStreamChannel.h"
#include "HDAStreamMap.h"
#ifdef IN_RING3
static int hdaR3StreamMapSetup(PHDASTREAMMAP pMap, PPDMAUDIOPCMPROPS pProps);
/**
* Initializes a stream mapping structure according to the given PCM properties.
*
* @return IPRT status code.
* @param pMap Pointer to mapping to initialize.
* @param pProps Pointer to PCM properties to use for initialization.
*/
int hdaR3StreamMapInit(PHDASTREAMMAP pMap, PPDMAUDIOPCMPROPS pProps)
{
AssertPtrReturn(pMap, VERR_INVALID_POINTER);
AssertPtrReturn(pProps, VERR_INVALID_POINTER);
if (!DrvAudioHlpPCMPropsAreValid(pProps))
return VERR_INVALID_PARAMETER;
hdaR3StreamMapReset(pMap);
int rc = hdaR3StreamMapSetup(pMap, pProps);
if (RT_FAILURE(rc))
return rc;
#ifdef VBOX_WITH_AUDIO_HDA_51_SURROUND
if ( RT_SUCCESS(rc)
/* Create circular buffer if not created yet. */
&& !pMap->pCircBuf)
{
rc = RTCircBufCreate(&pMap->pCircBuf, _4K); /** @todo Make size configurable? */
}
#endif
if (RT_SUCCESS(rc))
{
pMap->cbFrameSize = pProps->cChannels * pProps->cBytes;
LogFunc(("cChannels=%RU8, cBytes=%RU8 -> cbFrameSize=%RU32\n",
pProps->cChannels, pProps->cBytes, pMap->cbFrameSize));
Assert(pMap->cbFrameSize); /* Frame size must not be 0. */
pMap->enmLayout = PDMAUDIOSTREAMLAYOUT_INTERLEAVED;
}
return rc;
}
/**
* Destroys a given stream mapping.
*
* @param pMap Pointer to mapping to destroy.
*/
void hdaR3StreamMapDestroy(PHDASTREAMMAP pMap)
{
hdaR3StreamMapReset(pMap);
#ifdef VBOX_WITH_AUDIO_HDA_51_SURROUND
if (pMap->pCircBuf)
{
RTCircBufDestroy(pMap->pCircBuf);
pMap->pCircBuf = NULL;
}
#endif
}
/**
* Resets a given stream mapping.
*
* @param pMap Pointer to mapping to reset.
*/
void hdaR3StreamMapReset(PHDASTREAMMAP pMap)
{
AssertPtrReturnVoid(pMap);
pMap->enmLayout = PDMAUDIOSTREAMLAYOUT_UNKNOWN;
if (pMap->paMappings)
{
for (uint8_t i = 0; i < pMap->cMappings; i++)
hdaR3StreamChannelDataDestroy(&pMap->paMappings[i].Data);
RTMemFree(pMap->paMappings);
pMap->paMappings = NULL;
pMap->cMappings = 0;
}
}
/**
* Sets up a stream mapping according to the given properties / configuration.
*
* @return VBox status code, or VERR_NOT_SUPPORTED if the channel setup is not supported (yet).
* @param pMap Pointer to mapping to set up.
* @param pProps PCM audio properties to use for lookup.
*/
static int hdaR3StreamMapSetup(PHDASTREAMMAP pMap, PPDMAUDIOPCMPROPS pProps)
{
int rc;
/** @todo We ASSUME that all channels in a stream ...
* - have the same format
* - are in a consecutive order with no gaps in between
* - have a simple (raw) data layout
* - work in a non-striped fashion, e.g. interleaved (only on one SDn, not spread over multiple SDns) */
if ( pProps->cChannels == 1 /* Mono */
|| pProps->cChannels == 2 /* Stereo */
|| pProps->cChannels == 4 /* Quadrophonic */
|| pProps->cChannels == 6) /* Surround (5.1) */
{
/* For now we don't have anything other as mono / stereo channels being covered by the backends.
* So just set up one channel covering those and skipping the rest (like configured rear or center/LFE outputs). */
pMap->cMappings = 1;
pMap->paMappings = (PPDMAUDIOSTREAMMAP)RTMemAlloc(sizeof(PDMAUDIOSTREAMMAP) * pMap->cMappings);
if (!pMap->paMappings)
return VERR_NO_MEMORY;
PPDMAUDIOSTREAMMAP pMapLR = &pMap->paMappings[0];
pMapLR->aID[0] = PDMAUDIOSTREAMCHANNELID_FRONT_LEFT;
pMapLR->aID[1] = PDMAUDIOSTREAMCHANNELID_FRONT_RIGHT;
pMapLR->cbFrame = pProps->cBytes * pProps->cChannels;
pMapLR->cbSize = pProps->cBytes * 2 /* Front left + Front right channels */;
pMapLR->cbFirst = 0;
pMapLR->cbOff = pMapLR->cbFirst;
rc = hdaR3StreamChannelDataInit(&pMapLR->Data, PDMAUDIOSTREAMCHANNELDATA_FLAG_NONE);
AssertRC(rc);
}
else
rc = VERR_NOT_SUPPORTED; /** @todo r=andy Support more setups. */
return rc;
}
#endif /* IN_RING3 */
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