| /* | 
 |  *  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_ |