1 /*
2  *  Copyright 2017 The WebRTC project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #ifndef PC_RTP_MEDIA_UTILS_H_
12 #define PC_RTP_MEDIA_UTILS_H_
13 
14 #include "api/rtp_transceiver_interface.h"
15 
16 namespace webrtc {
17 
18 // Returns the RtpTransceiverDirection that satisfies specified send and receive
19 // conditions.
20 RtpTransceiverDirection RtpTransceiverDirectionFromSendRecv(bool send,
21                                                             bool recv);
22 
23 // Returns true only if the direction will send media.
24 bool RtpTransceiverDirectionHasSend(RtpTransceiverDirection direction);
25 
26 // Returns true only if the direction will receive media.
27 bool RtpTransceiverDirectionHasRecv(RtpTransceiverDirection direction);
28 
29 // Returns the RtpTransceiverDirection which is the reverse of the given
30 // direction.
31 RtpTransceiverDirection RtpTransceiverDirectionReversed(
32     RtpTransceiverDirection direction);
33 
34 // Returns the RtpTransceiverDirection with its send component set to |send|.
35 RtpTransceiverDirection RtpTransceiverDirectionWithSendSet(
36     RtpTransceiverDirection direction,
37     bool send = true);
38 
39 // Returns the RtpTransceiverDirection with its recv component set to |recv|.
40 RtpTransceiverDirection RtpTransceiverDirectionWithRecvSet(
41     RtpTransceiverDirection direction,
42     bool recv = true);
43 
44 // Returns an unspecified string representation of the given direction.
45 const char* RtpTransceiverDirectionToString(RtpTransceiverDirection direction);
46 
47 // Returns the intersection of the directions of two transceivers.
48 RtpTransceiverDirection RtpTransceiverDirectionIntersection(
49     RtpTransceiverDirection lhs,
50     RtpTransceiverDirection rhs);
51 
52 #ifdef UNIT_TEST
53 inline std::ostream& operator<<(  // no-presubmit-check TODO(webrtc:8982)
54     std::ostream& os,             // no-presubmit-check TODO(webrtc:8982)
55     RtpTransceiverDirection direction) {
56   return os << RtpTransceiverDirectionToString(direction);
57 }
58 #endif  // UNIT_TEST
59 
60 }  // namespace webrtc
61 
62 #endif  // PC_RTP_MEDIA_UTILS_H_
63