This is used to prelock a video/audio/anc buffer used as the source or target of DMA transfers. The driver will page-lock the buffer immediately, so it won't have to be done for each DMA transfer. This will reduce transfer time and CPU overhead at the cost of locking physical memory. More...

#include <ntv2publicinterface.h>

Collaboration diagram for NTV2BufferLock:

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Public Member Functions
std::ostream &	Print (std::ostream &inOutStream) const
	Prints a human-readable representation of me to the given output stream. More...

Construction & Destruction
	NTV2BufferLock ()
	Constructs a default NTV2BufferLock struct. More...

	~NTV2BufferLock ()
	My default destructor, which frees all allocatable fields that I own. More...

	NTV2BufferLock (const NTV2Buffer &inBuffer, const ULWord inFlags)
	Constructs an NTV2BufferLock object to use in a CNTV2Card::DMABufferLock call. More...

	NTV2BufferLock (const ULWord *pInBuffer, const ULWord inByteCount, const ULWord inFlags)
	Constructs an NTV2BufferLock object to use in a CNTV2Card::DMABufferLock call. More...

	NTV2BufferLock (const ULWord64 inMaxLockSize, const ULWord inFlags)
	Constructs an NTV2BufferLock object to use in a CNTV2Card::DMABufferLock call. More...

Changing
bool	SetBuffer (const NTV2Buffer &inBuffer)
	Sets the buffer to lock for use in a subsequent call to CNTV2Card::DMABufferLock. More...

bool	SetBuffer (const ULWord *pInBuffer, const ULWord inByteCount)
	Sets the buffer to lock for use in a subsequent call to CNTV2Card::DMABufferLock. More...

void	SetFlags (const ULWord inFlags)
	Sets the action flags for use in a subsequent call to CNTV2Card::DMABufferLock. More...

void	SetMaxLockSize (const ULWord64 inNumBytes)
	Sets the maximum lock size for use in a subsequent call to CNTV2Card::DMABufferLock. More...

void	Clear (void)
	Resets the struct to its initialized state. More...

Public Attributes
NTV2_HEADER	mHeader
	The common structure header – ALWAYS FIRST! More...

NTV2Buffer	mBuffer
	Virtual address of a buffer to prelock, and its length. More...

ULWord	mFlags
	Action flags (lock, unlock, etc) More...

ULWord64	mMaxLockSize
	Max locked bytes. More...

ULWord	mReserved [30]
	Reserved for future expansion. More...

NTV2_TRAILER	mTrailer
	The common structure trailer – ALWAYS LAST! More...

Detailed Description

This is used to prelock a video/audio/anc buffer used as the source or target of DMA transfers. The driver will page-lock the buffer immediately, so it won't have to be done for each DMA transfer. This will reduce transfer time and CPU overhead at the cost of locking physical memory.

Note: This struct uses a constructor to properly initialize itself. Do not use memset or bzero to initialize or "clear" it.

Definition at line 8815 of file ntv2publicinterface.h.

Constructor & Destructor Documentation

◆ NTV2BufferLock() [1/4]

NTV2BufferLock::NTV2BufferLock ( )

explicit

Constructs a default NTV2BufferLock struct.

Definition at line 3091 of file ntv2publicinterface.cpp.

◆ ~NTV2BufferLock()

NTV2BufferLock::~NTV2BufferLock ( )

inline

My default destructor, which frees all allocatable fields that I own.

Definition at line 8830 of file ntv2publicinterface.h.

◆ NTV2BufferLock() [2/4]

NTV2BufferLock::NTV2BufferLock	(	const NTV2Buffer &	inBuffer,
		const ULWord	inFlags
	)

explicit

Constructs an NTV2BufferLock object to use in a CNTV2Card::DMABufferLock call.

Parameters

inBuffer	Specifies the memory to be locked for DMA operations.
inFlags	Specifies action flags (e.g. DMABUFFERLOCK_LOCK, etc.).

Definition at line 3099 of file ntv2publicinterface.cpp.

◆ NTV2BufferLock() [3/4]

NTV2BufferLock::NTV2BufferLock	(	const ULWord *	pInBuffer,
		const ULWord	inByteCount,
		const ULWord	inFlags
	)

explicit

Constructs an NTV2BufferLock object to use in a CNTV2Card::DMABufferLock call.

Parameters

pInBuffer	Specifies a pointer to the host buffer. This buffer will be locked for DMA operations.
inByteCount	Specifies a the length of the buffer to lock in bytes.
inFlags	Specifies action flags (lock, unlock, etc)

Definition at line 3108 of file ntv2publicinterface.cpp.

◆ NTV2BufferLock() [4/4]

NTV2BufferLock::NTV2BufferLock	(	const ULWord64	inMaxLockSize,
		const ULWord	inFlags
	)

explicit

Constructs an NTV2BufferLock object to use in a CNTV2Card::DMABufferLock call.

Parameters

inMaxLockSize	Specifies the maximum lock size in bytes
inFlags	Specifies action flags (lock, unlock, etc)

Definition at line 3117 of file ntv2publicinterface.cpp.

Member Function Documentation

◆ Clear()

void NTV2BufferLock::Clear ( void )

inline

Resets the struct to its initialized state.

Note: This does not release locked buffers.

Definition at line 8893 of file ntv2publicinterface.h.

◆ Print()

ostream & NTV2BufferLock::Print ( std::ostream & inOutStream ) const

Prints a human-readable representation of me to the given output stream.

Parameters

inOutStream Specifies the output stream to use.

Returns: A reference to the output stream.

Definition at line 3132 of file ntv2publicinterface.cpp.

◆ SetBuffer() [1/2]

bool NTV2BufferLock::SetBuffer ( const NTV2Buffer & inBuffer )

Sets the buffer to lock for use in a subsequent call to CNTV2Card::DMABufferLock.

Parameters

inBuffer Specifies the memory to be locked for DMA operations.

Returns: True if successful; otherwise false.

Definition at line 3126 of file ntv2publicinterface.cpp.

◆ SetBuffer() [2/2]

bool NTV2BufferLock::SetBuffer	(	const ULWord *	pInBuffer,
		const ULWord	inByteCount
	)

inline

Sets the buffer to lock for use in a subsequent call to CNTV2Card::DMABufferLock.

Parameters

pInBuffer	Specifies a pointer to the host buffer. This buffer will be locked for DMA operations.
inByteCount	Specifies a the length of the buffer to lock in bytes.

Returns: True if successful; otherwise false.

Definition at line 8872 of file ntv2publicinterface.h.

◆ SetFlags()

void NTV2BufferLock::SetFlags ( const ULWord inFlags )

inline

Sets the action flags for use in a subsequent call to CNTV2Card::DMABufferLock.

Parameters

inFlags Specifies action flags (lock, unlock, etc)

Definition at line 8881 of file ntv2publicinterface.h.

◆ SetMaxLockSize()

void NTV2BufferLock::SetMaxLockSize ( const ULWord64 inNumBytes )

inline

Sets the maximum lock size for use in a subsequent call to CNTV2Card::DMABufferLock.

Parameters

inNumBytes Specifies maximum lock size, in bytes.

Definition at line 8887 of file ntv2publicinterface.h.

Member Data Documentation

◆ mBuffer

NTV2Buffer NTV2BufferLock::mBuffer

Virtual address of a buffer to prelock, and its length.

Definition at line 8817 of file ntv2publicinterface.h.

◆ mFlags

ULWord NTV2BufferLock::mFlags

Action flags (lock, unlock, etc)

Definition at line 8819 of file ntv2publicinterface.h.

◆ mHeader

NTV2_HEADER NTV2BufferLock::mHeader

The common structure header – ALWAYS FIRST!

Definition at line 8816 of file ntv2publicinterface.h.

◆ mMaxLockSize

ULWord64 NTV2BufferLock::mMaxLockSize

Max locked bytes.

Definition at line 8820 of file ntv2publicinterface.h.

◆ mReserved

ULWord NTV2BufferLock::mReserved[30]

Reserved for future expansion.

Definition at line 8821 of file ntv2publicinterface.h.

◆ mTrailer

NTV2_TRAILER NTV2BufferLock::mTrailer

The common structure trailer – ALWAYS LAST!

Definition at line 8822 of file ntv2publicinterface.h.

The documentation for this class was generated from the following files:

/home/tcbuilder/buildAgent/work/df8e8cce5bebfd58/libajantv2/ajantv2/includes/ntv2publicinterface.h
/home/tcbuilder/buildAgent/work/df8e8cce5bebfd58/libajantv2/ajantv2/src/ntv2publicinterface.cpp

Public Member Functions

Public Attributes

Detailed Description

Constructor & Destructor Documentation

◆ NTV2BufferLock() [1/4]

◆ ~NTV2BufferLock()

◆ NTV2BufferLock() [2/4]

◆ NTV2BufferLock() [3/4]

◆ NTV2BufferLock() [4/4]

Member Function Documentation

◆ Clear()

◆ Print()

◆ SetBuffer() [1/2]

◆ SetBuffer() [2/2]

◆ SetFlags()

◆ SetMaxLockSize()

Member Data Documentation

◆ mBuffer

◆ mFlags

◆ mHeader

◆ mMaxLockSize

◆ mReserved

◆ mTrailer