RTCPeerConnection介绍

最新推荐文章于 2025-06-24 09:06:41 发布

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最新推荐文章于 2025-06-24 09:06:41 发布 · 2k 阅读

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RTCPeerConnection是WebRTC的核心组件，用于建立和管理两个浏览器之间的实时通信连接。它涉及ICE协议，拥有本地和远程流集合，并在创建时初始化ICE代理、状态等。当有ICE事件发生时，如地址收集或连接状态变化，会触发相应的处理。同时，RTCPeerConnection处理offer、answer的创建和设置，确保同一时间只有一个这样的操作在执行。媒体流的添加和移除也会触发流事件。

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The general operation of the RTCPeerConnection is described in [RTCWEB-JSEP].

4.3.1 Operation

Calling new RTCPeerConnection(configuration ) creates an RTCPeerConnection object.

The configuration has the information to find and access the servers used by ICE. There may be multiple servers of each type and any TURN server also acts as a STUN server.

An RTCPeerConnection object has an associated ICE agent [ICE], RTCPeerConnection signaling state, ICE gathering state, and ICE connection state. These are initialized when the object is created.

An RTCPeerConnection object has two associated stream sets. A local streams set, representing streams that are currently sent, and a remote streams set, representing streams that are currently received with this RTCPeerConnection object. The stream sets are initialized to empty sets when the RTCPeerConnection object is created.

When the RTCPeerConnection() constructor is invoked, the user agent must run the following steps:

Validate the RTCConfiguration argument by running the steps defined by the updateIce() method.

Let connection be a newly created RTCPeerConnection object.

Create an ICE Agent as defined in [ICE] and let connection's RTCPeerConnection ICE Agent be that ICE Agent and provide it the the ICE servers list. The ICE Agent will proceed with gathering as soon as the ICE transports setting is not set to none. At this point the ICE Agent does not know how many ICE components it needs (and hence the number of candida