ohos-media-streamsource.md

# OHOS::Media::StreamSource
## **Overview**
**Related Modules:**
[MultiMedia\_MediaCommon](multimedia_mediacommon.md)
**Description:**
Provides functions related to the stream source for upper-layer applications.
After the **SetSource** function is called, the player invokes [OnBufferAvailable](multimedia_mediacommon.md#gaaebd4fe9df44b434f410aec32cf23467) to notify your application of the buffer memory block that can be filled with data. The player can invoke [SetStreamCallback](multimedia_mediacommon.md#ga078516891396a86226c945e02c79c1f5) to register a callback for your application. For example, the **GetBuffer** callback obtains the address of the buffer block and sends the filled buffer memory block to the player. The buffer memory block is allocated and processed on the player. **[StreamSource](ohos-media-streamsource.md)**is available only for the media source of the **SOURCE\_TYPE\_STREAM** type. For details, see [SourceType](format.md#ga3ae727773c367ac1041d72ac770a0ab1).
**Since:**
1.0
**Version:**
1.0
## **Summary**
## Public Member Functions

Public Member Function Name	Description
OnBufferAvailable (size_t index, size_t offset, size_t size)=0	virtual void Notifies your application of the information about the buffer memory block that can be filled with data.
SetStreamCallback (const std::shared_ptr< StreamCallback > &callback)=0	virtual void Sets a callback function for your application.