# OHOS::Media::StreamCallback - [Overview](#section1708185826165633) - [Summary](#section1272339314165633) - [Public Types](#pub-types) - [Public Member Functions](#pub-methods) ## **Overview** **Related Modules:** [MultiMedia\_MediaCommon](MultiMedia_MediaCommon.md) **Description:** Provides functions to obtain the address of a buffer memory and write the filled buffers into the playback queue. You need to implement the **[StreamCallback](OHOS-Media-StreamCallback.md)** functions in a player object. **Since:** 1.0 **Version:** 1.0 ## **Summary** ## Public Types

Public Type Name	Description
BufferFlags : uint32_t { STREAM_FLAG_SYNCFRAME = 1, STREAM_FLAG_CODECCONFIG = 2, STREAM_FLAG_EOS = 4, STREAM_FLAG_PARTIAL_FRAME = 8, STREAM_FLAG_ENDOFFRAME = 16, STREAM_FLAG_MUXER_DATA = 32 }	Enumerates buffer types of stream sources.

## Public Member Functions

Function	Description
GetBuffer (size_t index)=0	virtual uint8_t * Obtains the virtual address of a buffer memory block based on its index.
QueueBuffer (size_t index, size_t offset, size_t size, int64_t timestampUs, uint32_t flags)=0	virtual void Writes the filled buffer memory block into the player memory.
SetParameters (const Format &params)=0	virtual void Sets additional information about a stream.

Function

Description

GetBuffer (size_t index)=0

virtual uint8_t *

Obtains the virtual address of a buffer memory block based on its index.

QueueBuffer (size_t index, size_t offset, size_t size, int64_t timestampUs, uint32_t flags)=0

virtual void

Writes the filled buffer memory block into the player memory.

SetParameters (const Format &params)=0

virtual void

Sets additional information about a stream.