|  | /* | 
|  | *  Copyright 2020 The WebRTC project authors. All Rights Reserved. | 
|  | * | 
|  | *  Use of this source code is governed by a BSD-style license | 
|  | *  that can be found in the LICENSE file in the root of the source | 
|  | *  tree. An additional intellectual property rights grant can be found | 
|  | *  in the file PATENTS.  All contributing project authors may | 
|  | *  be found in the AUTHORS file in the root of the source tree. | 
|  | */ | 
|  |  | 
|  | #ifndef API_RTP_TRANSCEIVER_DIRECTION_H_ | 
|  | #define API_RTP_TRANSCEIVER_DIRECTION_H_ | 
|  |  | 
|  | namespace webrtc { | 
|  |  | 
|  | // https://w3c.github.io/webrtc-pc/#dom-rtcrtptransceiverdirection | 
|  | enum class RtpTransceiverDirection { | 
|  | kSendRecv, | 
|  | kSendOnly, | 
|  | kRecvOnly, | 
|  | kInactive, | 
|  | kStopped, | 
|  | }; | 
|  |  | 
|  | template <typename Sink> | 
|  | void AbslStringify(Sink& sink, RtpTransceiverDirection direction) { | 
|  | switch (direction) { | 
|  | case RtpTransceiverDirection::kSendRecv: | 
|  | sink.Append("sendrecv"); | 
|  | break; | 
|  | case RtpTransceiverDirection::kSendOnly: | 
|  | sink.Append("send"); | 
|  | break; | 
|  | case RtpTransceiverDirection::kRecvOnly: | 
|  | sink.Append("recv"); | 
|  | break; | 
|  | case RtpTransceiverDirection::kInactive: | 
|  | sink.Append("inactive"); | 
|  | break; | 
|  | case RtpTransceiverDirection::kStopped: | 
|  | sink.Append("stopped"); | 
|  | break; | 
|  | } | 
|  | } | 
|  |  | 
|  | }  // namespace webrtc | 
|  |  | 
|  | #endif  // API_RTP_TRANSCEIVER_DIRECTION_H_ |