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OHOS-Media-StreamSource.md 3.24 KB

# OHOS::Media::StreamSource<a name="ZH-CN_TOPIC_0000001054879546"></a>

## **Overview**<a name="section25430804093532"></a>

**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**<a name="section178024689093532"></a>

## Public Member Functions<a name="pub-methods"></a>

<a name="table604178437093532"></a>
<table><thead align="left"><tr id="row2073141114093532"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p1109619490093532"><a name="p1109619490093532"></a><a name="p1109619490093532"></a>Public Member Function Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p1843627956093532"><a name="p1843627956093532"></a><a name="p1843627956093532"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row717410358093532"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1832986306093532"><a name="p1832986306093532"></a><a name="p1832986306093532"></a><a href="MultiMedia_MediaCommon.md#gaaebd4fe9df44b434f410aec32cf23467">OnBufferAvailable</a> (size_t <a href="zh-cn_topic_0000001055198076.md#ga1d3748ca570dcb09a2fb28e8015107dd">index</a>, size_t offset, size_t size)=0</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1217160767093532"><a name="p1217160767093532"></a><a name="p1217160767093532"></a>virtual void&nbsp;</p>
<p id="p2070504676093532"><a name="p2070504676093532"></a><a name="p2070504676093532"></a>Notifies your application of the information about the buffer memory block that can be filled with data. </p>
</td>
</tr>
<tr id="row721469379093532"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1043998234093532"><a name="p1043998234093532"></a><a name="p1043998234093532"></a><a href="MultiMedia_MediaCommon.md#ga078516891396a86226c945e02c79c1f5">SetStreamCallback</a> (const std::shared_ptr&lt; <a href="OHOS-Media-StreamCallback.md">StreamCallback</a> &gt; &amp;callback)=0</p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p763226835093532"><a name="p763226835093532"></a><a name="p763226835093532"></a>virtual void&nbsp;</p>
<p id="p2139923513093532"><a name="p2139923513093532"></a><a name="p2139923513093532"></a>Sets a callback function for your application. </p>
</td>
</tr>
</tbody>
</table>

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提交于 2020-09-08 10:08 . add OpenHarmony 1.0 baseline

OHOS::Media::StreamSource

Overview

Related Modules:

MultiMedia_MediaCommon

Description:

Provides functions related to the stream source for upper-layer applications.

After the SetSource function is called, the player invokes OnBufferAvailable to notify your application of the buffer memory block that can be filled with data. The player can invoke SetStreamCallback 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**is available only for the media source of the SOURCE_TYPE_STREAM type. For details, see SourceType.

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.

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