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/**************************************************************************
A/V Stream Camera Sample
Copyright (c) 2013, Microsoft Corporation.
File:
util.h
Abstract:
Contains miscellaneous helper functions such as random number
generation and bounds checking functions.
History:
created 7/12/2013
**************************************************************************/
//
// Generate a random number using the standard Crypto library.
// Fall back to the QPC, if crypto library reports an error.
//
ULONG
GetRandom(
_In_ ULONG Minimum,
_In_ ULONG Maximum
);
//
// Generate a random number using the standard Crypto library.
// Fall back to the QPC, if crypto library reports an error.
//
LONG
GetRandom(
_In_ LONG Minimum,
_In_ LONG Maximum
);
//
// Convert an EV Compensation flag into the denominator of a fraction.
//
LONG
EVFlags2Denominator(
_In_ ULONGLONG Flags
);
//
// Convert a WhiteBalance Extended Property Enum to temperature
//
ULONG
WhiteBalancePreset2Temperature(
_In_ ULONG WBPreset
);
//
// Checks if a legacy Exposure setting is in range
//
BOOL
ExposureBinaryLogIsValid(
_In_ LONG ExposureBL
);
//
// Converts a legacy Exposure setting into 100 ns
//
LONGLONG
ExposureBinaryLogTo100ns(
_In_ LONG ExposureBL
);
//
// Converts a Exposure setting into a Binary log preset
//
LONG
Exposure100nsToBinaryLog(
_In_ LONGLONG Exposure100ns
);
//
// Convert ISO preset flags to a preset number
//
ULONG
IsoPreset2Value(
_In_ ULONGLONG Flags
);
//
// Convert ISO Mode & Value to legacy presets.
//
// Note: This function will simply pass legacy presets through.
//
ULONGLONG
IsoModeValue2Preset(
_In_ ULONGLONG Mode,
_In_ ULONG Value
);
LPCSTR
KSStateToStateName(
_In_ KSSTATE state
);
BOOL
MultiplyCheckOverflow (
ULONG a,
ULONG b,
ULONG *pab
);
// Note: I overload this function intentionally. Just use
// the correct type as the first parameter and the
// compiler figures out the function to use.
template<class T>
inline
NTSTATUS
BoundsCheck(
_In_ T Value,
_In_ const KSCAMERA_EXTENDEDPROP_VIDEOPROCSETTING &Bounds
)
{
NTSTATUS ntStatus = STATUS_SUCCESS;
if( (Bounds.Step==0 && Bounds.Min!=Bounds.Max) ||
(Bounds.Step!=0 && ((Value - T(Bounds.Min) ) % T(Bounds.Step)) != 0) ||
Value > T(Bounds.Max) ||
Value < T(Bounds.Min) )
{
ntStatus = STATUS_INVALID_PARAMETER;
}
return ntStatus;
}
inline
NTSTATUS
BoundsCheckSigned(
_In_ LONGLONG Value,
_In_ const KSCAMERA_EXTENDEDPROP_VIDEOPROCSETTING &Bounds
)
{
return BoundsCheck<LONGLONG>( Value, Bounds );
}
inline
NTSTATUS
BoundsCheckSigned(
_In_ LONG Value,
_In_ const KSPROPERTY_STEPPING_LONG &Bounds
)
{
NTSTATUS ntStatus = STATUS_SUCCESS;
if( (Bounds.SteppingDelta==0 && Bounds.Bounds.SignedMinimum!=Bounds.Bounds.SignedMaximum) ||
(Bounds.SteppingDelta!=0 && (Value - Bounds.Bounds.SignedMinimum) % Bounds.SteppingDelta) != 0 ||
Value > Bounds.Bounds.SignedMaximum ||
Value < Bounds.Bounds.SignedMinimum )
{
ntStatus = STATUS_INVALID_PARAMETER;
}
return ntStatus;
}
inline
NTSTATUS
BoundsCheckSigned(
_In_ LONGLONG Value,
_In_ const KSPROPERTY_STEPPING_LONGLONG &Bounds
)
{
NTSTATUS ntStatus = STATUS_SUCCESS;
if( (Bounds.SteppingDelta==0 && Bounds.Bounds.SignedMinimum!=Bounds.Bounds.SignedMaximum) ||
(Bounds.SteppingDelta!=0 && ((Value - Bounds.Bounds.SignedMinimum) % Bounds.SteppingDelta) != 0) ||
Value > Bounds.Bounds.SignedMaximum ||
Value < Bounds.Bounds.SignedMinimum )
{
ntStatus = STATUS_INVALID_PARAMETER;
}
return ntStatus;
}
// Note: I overload this function intentionally. Just use
// the correct type as the first parameter and the
// compiler figures out the function to use.
inline
NTSTATUS
BoundsCheckUnsigned(
_In_ ULONG Value,
_In_ const KSPROPERTY_STEPPING_LONG &Bounds
)
{
NTSTATUS ntStatus = STATUS_SUCCESS;
if( (Bounds.SteppingDelta==0 && Bounds.Bounds.UnsignedMinimum!=Bounds.Bounds.UnsignedMaximum) ||
(Bounds.SteppingDelta!=0 && ((Value - Bounds.Bounds.UnsignedMinimum) % Bounds.SteppingDelta) != 0) ||
Value > Bounds.Bounds.UnsignedMaximum ||
Value < Bounds.Bounds.UnsignedMinimum )
{
ntStatus = STATUS_INVALID_PARAMETER;
}
return ntStatus;
}
inline
NTSTATUS
BoundsCheckUnsigned(
_In_ ULONGLONG Value,
_In_ const KSPROPERTY_STEPPING_LONGLONG &Bounds
)
{
NTSTATUS ntStatus = STATUS_SUCCESS;
if( (Bounds.SteppingDelta==0 && Bounds.Bounds.UnsignedMinimum!=Bounds.Bounds.UnsignedMaximum) ||
(Bounds.SteppingDelta!=0 && ((Value - Bounds.Bounds.UnsignedMinimum) % Bounds.SteppingDelta) != 0) ||
Value > Bounds.Bounds.UnsignedMaximum ||
Value < Bounds.Bounds.UnsignedMinimum )
{
ntStatus = STATUS_INVALID_PARAMETER;
}
return ntStatus;
}
//
// This function is used internally to translate KSCAMERA_PERFRAMESETTING
// AUTO & MANUAL flags to KSCAMERA_EXTENDEDPROP_VIDEOPROCFLAG AUTO & MANUAL
// flags. There is no need to translate them back.
//
inline
ULONGLONG
TranslatePFS2VideoProcFlags(
ULONGLONG FromMode
)
{
// The PFS settings and VideoProc flags are mixed.
// To handle that, we'll first remove any PFS flags
// and hang onto the rest.
ULONGLONG ToMode=
FromMode & ~(KSCAMERA_PERFRAMESETTING_AUTO|KSCAMERA_PERFRAMESETTING_MANUAL);
if( FromMode & KSCAMERA_PERFRAMESETTING_AUTO )
{
ToMode |= KSCAMERA_EXTENDEDPROP_VIDEOPROCFLAG_AUTO;
}
if( FromMode & KSCAMERA_PERFRAMESETTING_MANUAL )
{
ToMode |= KSCAMERA_EXTENDEDPROP_VIDEOPROCFLAG_MANUAL;
}
return ToMode;
}
//
// Debugging Helper
//
PCSTR
FocusStateDbgTxt(
_In_ KSCAMERA_EXTENDEDPROP_FOCUSSTATE State
);
//
// Debugging Helper - translate ACPI rotation enum to degrees.
//
int
DbgRotation2Degrees(
AcpiPldRotation r
);
// Create a definition that self-initialize a KS_CAMERA_EXTRINSIC structure.
class CCameraExtrinsics_2Transforms : public KS_CAMERA_EXTRINSICS
{
public:
KS_CAMERA_EXTRINSICS_CALIBRATEDTRANSFORM CalibratedTransform2;
public:
CCameraExtrinsics_2Transforms()
{
RtlZeroMemory(this, sizeof(*this));
}
CCameraExtrinsics_2Transforms( ULONG Seed );
};
// Create a definition that self-initialize a KS_CAMERA_EXTRINSIC structure.
class CCameraIntrinsics_2Models : public KS_CAMERA_INTRINSICS
{
public:
KS_PINHOLECAMERAINTRINSIC_INTRINSICMODEL IntrinsicModel2;
public:
CCameraIntrinsics_2Models();
};
#define SAFE_FREE(_x_) \
if( _x_ ) \
{ \
ExFreePool( _x_ ); \
_x_ = nullptr; \
}
#define SAFE_DELETE(_x_) \
if( _x_ ) \
{ \
delete _x_; \
_x_ = nullptr; \
}
#define SAFE_DELETE_ARRAY(_x_) \
if( _x_ ) \
{ \
delete [] _x_; \
_x_ = nullptr; \
}
#define SAFE_CLOSE_HANDLE(_x_) \
if( (_x_ != NULL) && (_x_ != INVALID_HANDLE_VALUE) ) \
{ \
ZwClose( _x_ ); \
_x_ = INVALID_HANDLE_VALUE; \
}
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