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/* $Id: HostVideoInputDeviceImpl.cpp $ */
/** @file
* Host video capture device implementation.
*/
/*
* Copyright (C) 2013-2020 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.
*/
#define LOG_GROUP LOG_GROUP_MAIN_HOSTVIDEOINPUTDEVICE
#include "HostVideoInputDeviceImpl.h"
#include "LoggingNew.h"
#include "VirtualBoxImpl.h"
#ifdef VBOX_WITH_EXTPACK
# include "ExtPackManagerImpl.h"
#endif
#include <iprt/err.h>
#include <iprt/ldr.h>
#include <iprt/path.h>
#include <VBox/sup.h>
/*
* HostVideoInputDevice implementation.
*/
DEFINE_EMPTY_CTOR_DTOR(HostVideoInputDevice)
HRESULT HostVideoInputDevice::FinalConstruct()
{
return BaseFinalConstruct();
}
void HostVideoInputDevice::FinalRelease()
{
uninit();
BaseFinalRelease();
}
/*
* Initializes the instance.
*/
HRESULT HostVideoInputDevice::init(const com::Utf8Str &name, const com::Utf8Str &path, const com::Utf8Str &alias)
{
LogFlowThisFunc(("\n"));
/* Enclose the state transition NotReady->InInit->Ready */
AutoInitSpan autoInitSpan(this);
AssertReturn(autoInitSpan.isOk(), E_FAIL);
m.name = name;
m.path = path;
m.alias = alias;
/* Confirm a successful initialization */
autoInitSpan.setSucceeded();
return S_OK;
}
/*
* Uninitializes the instance.
* Called either from FinalRelease() or by the parent when it gets destroyed.
*/
void HostVideoInputDevice::uninit()
{
LogFlowThisFunc(("\n"));
/* Enclose the state transition Ready->InUninit->NotReady */
AutoUninitSpan autoUninitSpan(this);
if (autoUninitSpan.uninitDone())
return;
m.name.setNull();
m.path.setNull();
m.alias.setNull();
}
static HRESULT hostVideoInputDeviceAdd(HostVideoInputDeviceList *pList,
const com::Utf8Str &name,
const com::Utf8Str &path,
const com::Utf8Str &alias)
{
ComObjPtr<HostVideoInputDevice> obj;
HRESULT hr = obj.createObject();
if (SUCCEEDED(hr))
{
hr = obj->init(name, path, alias);
if (SUCCEEDED(hr))
pList->push_back(obj);
}
return hr;
}
static DECLCALLBACK(int) hostWebcamAdd(void *pvUser,
const char *pszName,
const char *pszPath,
const char *pszAlias,
uint64_t *pu64Result)
{
HostVideoInputDeviceList *pList = (HostVideoInputDeviceList *)pvUser;
HRESULT hr = hostVideoInputDeviceAdd(pList, pszName, pszPath, pszAlias);
if (FAILED(hr))
{
*pu64Result = (uint64_t)hr;
return VERR_NOT_SUPPORTED;
}
return VINF_SUCCESS;
}
/** @todo These typedefs must be in a header. */
typedef DECLCALLBACK(int) FNVBOXHOSTWEBCAMADD(void *pvUser,
const char *pszName,
const char *pszPath,
const char *pszAlias,
uint64_t *pu64Result);
typedef FNVBOXHOSTWEBCAMADD *PFNVBOXHOSTWEBCAMADD;
typedef DECLCALLBACK(int) FNVBOXHOSTWEBCAMLIST(PFNVBOXHOSTWEBCAMADD pfnWebcamAdd,
void *pvUser,
uint64_t *pu64WebcamAddResult);
typedef FNVBOXHOSTWEBCAMLIST *PFNVBOXHOSTWEBCAMLIST;
static int loadHostWebcamLibrary(const char *pszPath, RTLDRMOD *phmod, PFNVBOXHOSTWEBCAMLIST *ppfn)
{
int rc;
if (RTPathHavePath(pszPath))
{
RTLDRMOD hmod = NIL_RTLDRMOD;
RTERRINFOSTATIC ErrInfo;
rc = SUPR3HardenedLdrLoadPlugIn(pszPath, &hmod, RTErrInfoInitStatic(&ErrInfo));
if (RT_SUCCESS(rc))
{
static const char s_szSymbol[] = "VBoxHostWebcamList";
rc = RTLdrGetSymbol(hmod, s_szSymbol, (void **)ppfn);
if (RT_SUCCESS(rc))
*phmod = hmod;
else
{
if (rc != VERR_SYMBOL_NOT_FOUND)
LogRel(("Resolving symbol '%s': %Rrc\n", s_szSymbol, rc));
RTLdrClose(hmod);
hmod = NIL_RTLDRMOD;
}
}
else
{
LogRel(("Loading the library '%s': %Rrc\n", pszPath, rc));
if (RTErrInfoIsSet(&ErrInfo.Core))
LogRel((" %s\n", ErrInfo.Core.pszMsg));
}
}
else
{
LogRel(("Loading the library '%s': No path! Refusing to try loading it!\n", pszPath));
rc = VERR_INVALID_PARAMETER;
}
return rc;
}
static HRESULT fillDeviceList(VirtualBox *pVirtualBox, HostVideoInputDeviceList *pList)
{
HRESULT hr;
Utf8Str strLibrary;
#ifdef VBOX_WITH_EXTPACK
ExtPackManager *pExtPackMgr = pVirtualBox->i_getExtPackManager();
hr = pExtPackMgr->i_getLibraryPathForExtPack("VBoxHostWebcam", ORACLE_PUEL_EXTPACK_NAME, &strLibrary);
#else
hr = E_NOTIMPL;
#endif
if (SUCCEEDED(hr))
{
PFNVBOXHOSTWEBCAMLIST pfn = NULL;
RTLDRMOD hmod = NIL_RTLDRMOD;
int vrc = loadHostWebcamLibrary(strLibrary.c_str(), &hmod, &pfn);
LogRel(("Load [%s] vrc=%Rrc\n", strLibrary.c_str(), vrc));
if (RT_SUCCESS(vrc))
{
uint64_t u64Result = S_OK;
vrc = pfn(hostWebcamAdd, pList, &u64Result);
Log(("VBoxHostWebcamList vrc %Rrc, result 0x%08X\n", vrc, u64Result));
if (RT_FAILURE(vrc))
{
hr = (HRESULT)u64Result;
}
RTLdrClose(hmod);
hmod = NIL_RTLDRMOD;
}
if (SUCCEEDED(hr))
{
if (RT_FAILURE(vrc))
hr = pVirtualBox->setErrorBoth(VBOX_E_IPRT_ERROR, vrc, "Failed to get webcam list: %Rrc", vrc);
}
}
return hr;
}
/* static */ HRESULT HostVideoInputDevice::queryHostDevices(VirtualBox *pVirtualBox, HostVideoInputDeviceList *pList)
{
HRESULT hr = fillDeviceList(pVirtualBox, pList);
if (FAILED(hr))
{
pList->clear();
}
return hr;
}
/* vi: set tabstop=4 shiftwidth=4 expandtab: */
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