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 #include "pc/rtp_media_utils.h"
12
13 #include "rtc_base/checks.h"
14
15 namespace webrtc {
16
RtpTransceiverDirectionFromSendRecv(bool send,bool recv)17 RtpTransceiverDirection RtpTransceiverDirectionFromSendRecv(bool send,
18 bool recv) {
19 if (send && recv) {
20 return RtpTransceiverDirection::kSendRecv;
21 } else if (send && !recv) {
22 return RtpTransceiverDirection::kSendOnly;
23 } else if (!send && recv) {
24 return RtpTransceiverDirection::kRecvOnly;
25 } else {
26 return RtpTransceiverDirection::kInactive;
27 }
28 }
29
RtpTransceiverDirectionHasSend(RtpTransceiverDirection direction)30 bool RtpTransceiverDirectionHasSend(RtpTransceiverDirection direction) {
31 return direction == RtpTransceiverDirection::kSendRecv ||
32 direction == RtpTransceiverDirection::kSendOnly;
33 }
34
RtpTransceiverDirectionHasRecv(RtpTransceiverDirection direction)35 bool RtpTransceiverDirectionHasRecv(RtpTransceiverDirection direction) {
36 return direction == RtpTransceiverDirection::kSendRecv ||
37 direction == RtpTransceiverDirection::kRecvOnly;
38 }
39
RtpTransceiverDirectionReversed(RtpTransceiverDirection direction)40 RtpTransceiverDirection RtpTransceiverDirectionReversed(
41 RtpTransceiverDirection direction) {
42 switch (direction) {
43 case RtpTransceiverDirection::kSendRecv:
44 case RtpTransceiverDirection::kInactive:
45 case RtpTransceiverDirection::kStopped:
46 return direction;
47 case RtpTransceiverDirection::kSendOnly:
48 return RtpTransceiverDirection::kRecvOnly;
49 case RtpTransceiverDirection::kRecvOnly:
50 return RtpTransceiverDirection::kSendOnly;
51 default:
52 RTC_DCHECK_NOTREACHED();
53 return direction;
54 }
55 }
56
RtpTransceiverDirectionWithSendSet(RtpTransceiverDirection direction,bool send)57 RtpTransceiverDirection RtpTransceiverDirectionWithSendSet(
58 RtpTransceiverDirection direction,
59 bool send) {
60 return RtpTransceiverDirectionFromSendRecv(
61 send, RtpTransceiverDirectionHasRecv(direction));
62 }
63
RtpTransceiverDirectionWithRecvSet(RtpTransceiverDirection direction,bool recv)64 RtpTransceiverDirection RtpTransceiverDirectionWithRecvSet(
65 RtpTransceiverDirection direction,
66 bool recv) {
67 return RtpTransceiverDirectionFromSendRecv(
68 RtpTransceiverDirectionHasSend(direction), recv);
69 }
70
RtpTransceiverDirectionToString(RtpTransceiverDirection direction)71 const char* RtpTransceiverDirectionToString(RtpTransceiverDirection direction) {
72 switch (direction) {
73 case RtpTransceiverDirection::kSendRecv:
74 return "kSendRecv";
75 case RtpTransceiverDirection::kSendOnly:
76 return "kSendOnly";
77 case RtpTransceiverDirection::kRecvOnly:
78 return "kRecvOnly";
79 case RtpTransceiverDirection::kInactive:
80 return "kInactive";
81 case RtpTransceiverDirection::kStopped:
82 return "kStopped";
83 }
84 RTC_DCHECK_NOTREACHED();
85 return "";
86 }
87
RtpTransceiverDirectionIntersection(RtpTransceiverDirection lhs,RtpTransceiverDirection rhs)88 RtpTransceiverDirection RtpTransceiverDirectionIntersection(
89 RtpTransceiverDirection lhs,
90 RtpTransceiverDirection rhs) {
91 return RtpTransceiverDirectionFromSendRecv(
92 RtpTransceiverDirectionHasSend(lhs) &&
93 RtpTransceiverDirectionHasSend(rhs),
94 RtpTransceiverDirectionHasRecv(lhs) &&
95 RtpTransceiverDirectionHasRecv(rhs));
96 }
97
98 } // namespace webrtc
99