RTCRtpTransceiverDirection

RTCRtpTransceiverDirection type is an enumerated set of strings which are used to describe the directionality of a RTCRtpTransceiver 实例。 Both the preferred direction currentDirection properties are of this type.

Values

RTCRtpTransceiverDirection type is an enumeration of string values. Each describes how the transceiver's associated RTCRtpSender and RTCRtpReceiver behave as shown in the table below.

RTCRtpSender behavior RTCRtpReceiver behavior
"sendrecv" Offers to send RTP data, and will do so if the other peer accepts the connection and at least one of the sender's encodings is active 1 . Offers to receive RTP data, and does so if the other peer accepts.
"sendonly" Offers to send RTP data, and will do so if the other peer accepts the connection and at least one of the sender's encodings is active 1 . Does not offer to receive RTP data and will not do so.
"recvonly" Does not offer to send RTP data, and will not do so. Offers to receive RTP data, and will do so if the other peer offers.
"inactive" Does not offer to send RTP data, and will not do so. Does not offer to receive RTP data and will not do so.

[1] To determine if a sender has at least one active encoding, the user agent gets its parameters using RTCRtpSender.getParameters() , then looks at the parameters' encodings property; if any of the listed encodings has its active property set to true , the sender has an active encoding.

规范

规范 状态 Comment
WebRTC 1.0: Real-time Communication Between Browsers
The definition of 'RTCRtpTransceiverDirection' in that specification.
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浏览器兼容性

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Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
RTCRtpTransceiverDirection Chrome 69 Edge ≤18 Firefox 59 IE 不支持 No Opera ? Safari ? WebView Android 69 Chrome Android 69 Firefox Android 59 Opera Android ? Safari iOS ? Samsung Internet Android 10.0

图例

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