nx_metadata_sdk 1.0 Metadata SDK

Public Member Functions | Static Public Member Functions | List of all members
nx::sdk::analytics::IMotionMetadataPacket Class Referenceabstract

`#include <i_motion_metadata_packet.h>`

Inheritance diagram for nx::sdk::analytics::IMotionMetadataPacket:

## Public Member Functions
virtual const uint8_t * | motionData () const =0
virtual int | motionDataSize () const =0
virtual int | rowCount () const =0
virtual int | columnCount () const =0
virtual bool | isEmpty () const =0
virtual bool | isMotionAt (int columnIndex, int rowIndex) const =0
Public Member Functions inherited from nx::sdk::Interface< IMotionMetadataPacket, IMetadataPacket0 >
virtual IRefCountable * | queryInterface (const InterfaceId *id)
Ptr< Interface > | queryInterface ()
Ptr< const Interface > | queryInterface () const

## Static Public Member Functions
static auto | interfaceId ()

## Additional Inherited Members
Protected Member Functions inherited from nx::sdk::Interface< IMotionMetadataPacket, IMetadataPacket0 >
virtual IRefCountable * | queryInterface (const IRefCountable::InterfaceId *id) override
IRefCountable * | queryInterfaceSupportingDeprecatedId (const IRefCountable::InterfaceId *id, const Uuid &deprecatedInterfaceId)

## Detailed Description

Metadata packet containing information about motion on the scene.

## Member Function Documentation

## ◆ columnCount()

virtual int nx::sdk::analytics::IMotionMetadataPacket::columnCount | ( |  | ) | const
| pure virtual

Returns
  Column count of the motion detector grid.

## ◆ isEmpty()

virtual bool nx::sdk::analytics::IMotionMetadataPacket::isEmpty | ( |  | ) | const
| pure virtual

Returns
  true if motion has been detected at least in one cell, false otherwise.

## ◆ isMotionAt()

virtual bool nx::sdk::analytics::IMotionMetadataPacket::isMotionAt | ( | int | columnIndex,
|  | int | rowIndex
| ) |  | const
| pure virtual

Returns
  Whether motion has been detected in the specified cell.

## ◆ motionData()

virtual const uint8_t* nx::sdk::analytics::IMotionMetadataPacket::motionData | ( |  | ) | const
| pure virtual

Motion metadata is represented as a grid with a certain number of rows and columns. The grid coordinate system starts at the top left corner, the row index grows down and the column index grows right. This grid is represented as a contiguous array, each bit of which corresponds to the state of a particular cell of the grid (1 if motion has been detected in this cell, 0 otherwise). The bit index for a cell with coordinates (column, row) can be calculated using the following formula: bitNumber = gridHeight * column + row.

Returns
  Pointer to the grid buffer.

## ◆ motionDataSize()

virtual int nx::sdk::analytics::IMotionMetadataPacket::motionDataSize | ( |  | ) | const
| pure virtual

Returns
  Size of the motion metadata buffer in bytes. Number of bits in the grid buffer may be more than the number of bits needed to store the whole grid, values of those excessive bits are undefined and should be ignored.

## ◆ rowCount()

virtual int nx::sdk::analytics::IMotionMetadataPacket::rowCount | ( |  | ) | const
| pure virtual

Returns
  Row count of the motion detector grid.

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

- src/nx/sdk/analytics/i_motion_metadata_packet.h