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_SDP_UTILS_H_
12 #define PC_SDP_UTILS_H_
13 
14 #include <functional>
15 #include <memory>
16 #include <string>
17 
18 #include "api/jsep.h"
19 #include "p2p/base/transport_info.h"
20 #include "pc/session_description.h"
21 #include "rtc_base/system/rtc_export.h"
22 
23 namespace webrtc {
24 
25 // Returns a copy of the given session description.
26 RTC_EXPORT std::unique_ptr<SessionDescriptionInterface> CloneSessionDescription(
27     const SessionDescriptionInterface* sdesc);
28 
29 // Returns a copy of the given session description with the type changed.
30 RTC_EXPORT std::unique_ptr<SessionDescriptionInterface>
31 CloneSessionDescriptionAsType(const SessionDescriptionInterface* sdesc,
32                               SdpType type);
33 
34 // Function that takes a single session description content with its
35 // corresponding transport and produces a boolean.
36 typedef std::function<bool(const cricket::ContentInfo*,
37                            const cricket::TransportInfo*)>
38     SdpContentPredicate;
39 
40 // Returns true if the predicate returns true for all contents in the given
41 // session description.
42 bool SdpContentsAll(SdpContentPredicate pred,
43                     const cricket::SessionDescription* desc);
44 
45 // Returns true if the predicate returns true for none of the contents in the
46 // given session description.
47 bool SdpContentsNone(SdpContentPredicate pred,
48                      const cricket::SessionDescription* desc);
49 
50 // Function that takes a single session description content with its
51 // corresponding transport and can mutate the content and/or the transport.
52 typedef std::function<void(cricket::ContentInfo*, cricket::TransportInfo*)>
53     SdpContentMutator;
54 
55 // Applies the mutator function over all contents in the given session
56 // description.
57 void SdpContentsForEach(SdpContentMutator fn,
58                         cricket::SessionDescription* desc);
59 
60 }  // namespace webrtc
61 
62 #endif  // PC_SDP_UTILS_H_
63