BufferStream

Overview

Related Modules:

Format

Description:

Defines the function for reading stream data.

Since:

1.0

Version:

1.0

Summary

Data Fields

Variable Name

Description

ReadData )(void handle, uint8_t data, int32_t size, int32_t timeOutMs, DataFlags flags)

int32_t( 

Reads data from streams, save the data to the buffer pointed by data with the specified size, and returns the size of the read data and type.

GetReadableSize )(const void handle)

int32_t( 

Obtains the size of data that can be read.

handle

void * 

Details

Field Documentation

GetReadableSize

  1. int32_t(* BufferStream::GetReadableSize) (const void *[handle]($api-api-SmartVision-Devices-BufferStream.md#ae2019a77aba73fa96d5a716155c7fb7f))

Description:

Obtains the size of data that can be read.

Before reading data, you should call this function to check whether there is data to read.

Parameters:

Name

Description
handle Indicates the pointer to the context handle.

Returns:

Returns the size of the read data.

handle

  1. void* BufferStream::handle

Description:

Context handle

ReadData

  1. int32_t(* BufferStream::ReadData) (void *[handle]($api-api-SmartVision-Devices-BufferStream.md#ae2019a77aba73fa96d5a716155c7fb7f), uint8_t *data, int32_t size, int32_t timeOutMs, [DataFlags]($api-api-SmartVision-Devices-Format.md#gacff079fdf8427c743f9197ea5be33a7f) *flags)

Description:

Reads data from streams, save the data to the buffer pointed by data with the specified size, and returns the size of the read data and type.

Parameters:

Name

Description
handle Indicates the pointer to the context handle.
data Indicates the pointer to the buffer to store the read data. The memory is allocated by the caller.
size Indicates the size of the available buffer memory.
timeOutMs Indicates read operation wait time. The value 0 means no wait time.
flags Indicates the pointer to the type of the read data, see DataFlags.

Returns:

Returns the size of the read data.