third_party/libwebrtc/pc/rtp_media_utils.h

   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 <ostream>  // no-presubmit-check TODO(webrtc:8982)
  15
  16 #include "api/rtp_transceiver_direction.h"
  17
  18 namespace webrtc {
  19
  20 // Returns the RtpTransceiverDirection that satisfies specified send and receive
  21 // conditions.
  22 RtpTransceiverDirection RtpTransceiverDirectionFromSendRecv(bool send,
  23                                                             bool recv);
  24
  25 // Returns true only if the direction will send media.
  26 bool RtpTransceiverDirectionHasSend(RtpTransceiverDirection direction);
  27
  28 // Returns true only if the direction will receive media.
  29 bool RtpTransceiverDirectionHasRecv(RtpTransceiverDirection direction);
  30
  31 // Returns the RtpTransceiverDirection which is the reverse of the given
  32 // direction.
  33 RtpTransceiverDirection RtpTransceiverDirectionReversed(
  34     RtpTransceiverDirection direction);
  35
  36 // Returns the RtpTransceiverDirection with its send component set to `send`.
  37 RtpTransceiverDirection RtpTransceiverDirectionWithSendSet(
  38     RtpTransceiverDirection direction,
  39     bool send = true);
  40
  41 // Returns the RtpTransceiverDirection with its recv component set to `recv`.
  42 RtpTransceiverDirection RtpTransceiverDirectionWithRecvSet(
  43     RtpTransceiverDirection direction,
  44     bool recv = true);
  45
  46 // Returns an unspecified string representation of the given direction.
  47 const char* RtpTransceiverDirectionToString(RtpTransceiverDirection direction);
  48
  49 // Returns the intersection of the directions of two transceivers.
  50 RtpTransceiverDirection RtpTransceiverDirectionIntersection(
  51     RtpTransceiverDirection lhs,
  52     RtpTransceiverDirection rhs);
  53
  54 #ifdef WEBRTC_UNIT_TEST
  55 inline std::ostream& operator<<(  // no-presubmit-check TODO(webrtc:8982)
  56     std::ostream& os,             // no-presubmit-check TODO(webrtc:8982)
  57     RtpTransceiverDirection direction) {
  58   return os << RtpTransceiverDirectionToString(direction);
  59 }
  60 #endif  // WEBRTC_UNIT_TEST
  61
  62 }  // namespace webrtc
  63
  64 #endif  // PC_RTP_MEDIA_UTILS_H_