LookingGlass/host/Capture/NvFBC.cpp
Geoffrey McRae 01b10b3ee1 [host] converted program to a windows hidden/background user app.
NvFBC will not start when running as a service, likely intentional
security of the API to prevent it from being abused.
2017-11-01 03:23:46 +11:00

251 lines
6.1 KiB
C++

#include "NvFBC.h"
#include <string>
#include "common\debug.h"
#include "Util.h"
#ifdef _WIN64
#define NVFBC_LIBRARY_NAME "NvFBC64.dll"
#else
#define NVFBC_LIBRARY_NAME "NvFBC.dll"
#endif
namespace Capture
{
NvFBC::NvFBC() :
m_initialized(false),
m_hDLL(NULL),
m_nvFBC(NULL)
{
}
NvFBC::~NvFBC()
{
}
bool NvFBC::Initialize()
{
if (m_initialized)
DeInitialize();
std::string nvfbc = Util::GetSystemRoot() + "\\" + NVFBC_LIBRARY_NAME;
m_hDLL = LoadLibraryA(nvfbc.c_str());
if (!m_hDLL)
{
DEBUG_ERROR("Failed to load the NvFBC library: %d - %s", GetLastError(), nvfbc.c_str());
return false;
}
m_fnCreateEx = (NvFBC_CreateFunctionExType )GetProcAddress(m_hDLL, "NvFBC_CreateEx" );
m_fnSetGlobalFlags = (NvFBC_SetGlobalFlagsType )GetProcAddress(m_hDLL, "NvFBC_SetGlobalFlags");
m_fnGetStatusEx = (NvFBC_GetStatusExFunctionType)GetProcAddress(m_hDLL, "NvFBC_GetStatusEx" );
m_fnEnable = (NvFBC_EnableFunctionType )GetProcAddress(m_hDLL, "NvFBC_Enable" );
if (!m_fnCreateEx || !m_fnSetGlobalFlags || !m_fnGetStatusEx || !m_fnEnable)
{
DEBUG_ERROR("Unable to locate required entry points in %s", nvfbc.c_str());
DeInitialize();
return false;
}
NvFBCStatusEx status;
ZeroMemory(&status, sizeof(NvFBCStatusEx));
status.dwVersion = NVFBC_STATUS_VER;
status.dwAdapterIdx = 0;
NVFBCRESULT ret = m_fnGetStatusEx(&status);
if (ret != NVFBC_SUCCESS)
{
DEBUG_INFO("Attempting to enable NvFBC");
if (m_fnEnable(NVFBC_STATE_ENABLE) == NVFBC_SUCCESS)
{
DEBUG_INFO("Success, attempting to get status again");
ret = m_fnGetStatusEx(&status);
}
if (ret != NVFBC_SUCCESS)
{
DEBUG_ERROR("Failed to get NvFBC status");
DeInitialize();
return false;
}
}
if (!status.bIsCapturePossible)
{
DEBUG_ERROR("Capture is not possible, unsupported device or driver");
DeInitialize();
return false;
}
if (!status.bCanCreateNow)
{
DEBUG_ERROR("Can not create an instance of NvFBC at this time");
DeInitialize();
return false;
}
NvFBCCreateParams params;
ZeroMemory(&params, sizeof(NvFBCCreateParams));
params.dwVersion = NVFBC_CREATE_PARAMS_VER;
params.dwInterfaceType = NVFBC_TO_SYS;
params.pDevice = NULL;
params.dwAdapterIdx = 0;
if (m_fnCreateEx(&params) != NVFBC_SUCCESS)
{
DEBUG_ERROR("Failed to create an instance of NvFBC");
DeInitialize();
return false;
}
m_maxCaptureWidth = params.dwMaxDisplayWidth;
m_maxCaptureHeight = params.dwMaxDisplayHeight;
m_nvFBC = static_cast<NvFBCToSys *>(params.pNvFBC);
NVFBC_TOSYS_SETUP_PARAMS setupParams;
ZeroMemory(&setupParams, sizeof(NVFBC_TOSYS_SETUP_PARAMS));
setupParams.dwVersion = NVFBC_TOSYS_SETUP_PARAMS_VER;
setupParams.eMode = NVFBC_TOSYS_RGB;
setupParams.bWithHWCursor = TRUE;
setupParams.bDiffMap = FALSE;
setupParams.ppBuffer = (void **)&m_frameBuffer;
setupParams.ppDiffMap = NULL;
if (m_nvFBC->NvFBCToSysSetUp(&setupParams) != NVFBC_SUCCESS)
{
DEBUG_ERROR("NvFBCToSysSetUp Failed");
DeInitialize();
return false;
}
// this is required according to NVidia sample code
Sleep(100);
ZeroMemory(&m_grabFrameParams, sizeof(NVFBC_TOSYS_GRAB_FRAME_PARAMS));
ZeroMemory(&m_grabInfo, sizeof(NvFBCFrameGrabInfo));
m_grabFrameParams.dwVersion = NVFBC_TOSYS_GRAB_FRAME_PARAMS_VER;
m_grabFrameParams.dwFlags = NVFBC_TOSYS_NOFLAGS;
m_grabFrameParams.dwStartX = 0;
m_grabFrameParams.dwStartY = 0;
m_grabFrameParams.eGMode = NVFBC_TOSYS_SOURCEMODE_SCALE;
m_grabFrameParams.pNvFBCFrameGrabInfo = &m_grabInfo;
if (!m_memcpy.Initialize())
{
DEBUG_ERROR("Failed to initialize MTMemcpy");
DeInitialize();
return false;
}
m_initialized = true;
return true;
}
void NvFBC::DeInitialize()
{
m_memcpy.DeInitialize();
m_frameBuffer = NULL;
if (m_nvFBC)
{
m_nvFBC->NvFBCToSysRelease();
m_nvFBC = NULL;
}
m_maxCaptureWidth = 0;
m_maxCaptureHeight = 0;
m_fnCreateEx = NULL;
m_fnSetGlobalFlags = NULL;
m_fnGetStatusEx = NULL;
m_fnEnable = NULL;
if (m_hDLL)
{
FreeLibrary(m_hDLL);
m_hDLL = NULL;
}
m_initialized = false;
}
FrameType NvFBC::GetFrameType()
{
if (!m_initialized)
return FRAME_TYPE_INVALID;
return FRAME_TYPE_RGB;
}
FrameComp NvFBC::GetFrameCompression()
{
if (!m_initialized)
return FRAME_COMP_NONE;
return FRAME_COMP_NONE;
}
size_t NvFBC::GetMaxFrameSize()
{
if (!m_initialized)
return false;
return m_maxCaptureWidth * m_maxCaptureHeight * 3;
}
bool NvFBC::GrabFrame(struct FrameInfo & frame)
{
if (!m_initialized)
return false;
const HWND hDesktop = GetDesktopWindow();
RECT desktop;
GetWindowRect(hDesktop, &desktop);
m_grabFrameParams.dwTargetWidth = desktop.right;
m_grabFrameParams.dwTargetHeight = desktop.bottom;
for(int i = 0; i < 2; ++i)
{
NVFBCRESULT status = m_nvFBC->NvFBCToSysGrabFrame(&m_grabFrameParams);
if (status == NVFBC_SUCCESS)
{
frame.width = m_grabInfo.dwWidth;
frame.height = m_grabInfo.dwHeight;
frame.stride = m_grabInfo.dwBufferWidth;
frame.outSize = m_grabInfo.dwBufferWidth * m_grabInfo.dwHeight * 3;
if (!m_memcpy.Copy(frame.buffer, m_frameBuffer, frame.outSize))
{
DEBUG_ERROR("Memory copy failed");
return false;
}
return true;
}
if (status == NVFBC_ERROR_DYNAMIC_DISABLE)
{
DEBUG_ERROR("NvFBC was disabled by someone else");
return false;
}
if (status == NVFBC_ERROR_INVALIDATED_SESSION)
{
DEBUG_WARN("Session was invalidated, attempting to restart");
DeInitialize();
if (!Initialize())
{
DEBUG_ERROR("Failed to re-iniaialize");
return false;
}
}
}
DEBUG_ERROR("Failed to grab frame");
return false;
}
};