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source: webrtc/talk/app/webrtc/jsepsessiondescription.cc @ 0:4bda6873e34c

pub_scrub_3792 tip
Last change on this file since 0:4bda6873e34c was 0:4bda6873e34c, checked in by Michael Prittie <mprittie@…>, 6 years ago

Scrubbed password for publication.

File size: 6.6 KB
Line 
1/* libjingle
2 * Copyright 2012, Google Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 *  1. Redistributions of source code must retain the above copyright notice,
8 *     this list of conditions and the following disclaimer.
9 *  2. Redistributions in binary form must reproduce the above copyright notice,
10 *     this list of conditions and the following disclaimer in the documentation
11 *     and/or other materials provided with the distribution.
12 *  3. The name of the author may not be used to endorse or promote products
13 *     derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
16 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
17 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
18 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
21 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
24 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "talk/app/webrtc/jsepsessiondescription.h"
28
29#include "talk/app/webrtc/webrtcsdp.h"
30#include "talk/base/stringencode.h"
31#include "talk/session/media/mediasession.h"
32
33using talk_base::scoped_ptr;
34using cricket::SessionDescription;
35
36namespace webrtc {
37
38static const char* kSupportedTypes[] = {
39    JsepSessionDescription::kOffer,
40    JsepSessionDescription::kPrAnswer,
41    JsepSessionDescription::kAnswer
42};
43
44static bool IsTypeSupported(const std::string& type) {
45  bool type_supported = false;
46  for (size_t i = 0; i < ARRAY_SIZE(kSupportedTypes); ++i) {
47    if (kSupportedTypes[i] == type) {
48      type_supported = true;
49      break;
50    }
51  }
52  return type_supported;
53}
54
55const char SessionDescriptionInterface::kOffer[] = "offer";
56const char SessionDescriptionInterface::kPrAnswer[] = "pranswer";
57const char SessionDescriptionInterface::kAnswer[] = "answer";
58
59const int JsepSessionDescription::kDefaultVideoCodecId = 100;
60const int JsepSessionDescription::kDefaultVideoCodecFramerate = 30;
61const char JsepSessionDescription::kDefaultVideoCodecName[] = "VP8";
62const int JsepSessionDescription::kMaxVideoCodecWidth = 1280;
63const int JsepSessionDescription::kMaxVideoCodecHeight = 720;
64const int JsepSessionDescription::kDefaultVideoCodecPreference = 1;
65
66SessionDescriptionInterface* CreateSessionDescription(const std::string& type,
67                                                      const std::string& sdp) {
68  return CreateSessionDescription(type, sdp, NULL);
69}
70
71SessionDescriptionInterface* CreateSessionDescription(const std::string& type,
72                                                      const std::string& sdp,
73                                                      SdpParseError* error) {
74  if (!IsTypeSupported(type)) {
75    return NULL;
76  }
77
78  JsepSessionDescription* jsep_desc = new JsepSessionDescription(type);
79  if (!jsep_desc->Initialize(sdp, error)) {
80    delete jsep_desc;
81    return NULL;
82  }
83  return jsep_desc;
84}
85
86JsepSessionDescription::JsepSessionDescription(const std::string& type)
87    : type_(type) {
88}
89
90JsepSessionDescription::~JsepSessionDescription() {}
91
92bool JsepSessionDescription::Initialize(
93    cricket::SessionDescription* description,
94    const std::string& session_id,
95    const std::string& session_version) {
96  if (!description)
97    return false;
98
99  session_id_ = session_id;
100  session_version_ = session_version;
101  description_.reset(description);
102  candidate_collection_.resize(number_of_mediasections());
103  return true;
104}
105
106bool JsepSessionDescription::Initialize(const std::string& sdp,
107                                        SdpParseError* error) {
108  return SdpDeserialize(sdp, this, error);
109}
110
111bool JsepSessionDescription::AddCandidate(
112    const IceCandidateInterface* candidate) {
113  if (!candidate || candidate->sdp_mline_index() < 0)
114    return false;
115  size_t mediasection_index = 0;
116  if (!GetMediasectionIndex(candidate, &mediasection_index)) {
117    return false;
118  }
119  if (mediasection_index >= number_of_mediasections())
120    return false;
121  if (candidate_collection_[mediasection_index].HasCandidate(candidate)) {
122    return true;  // Silently ignore this candidate if we already have it.
123  }
124  const std::string content_name =
125      description_->contents()[mediasection_index].name;
126  const cricket::TransportInfo* transport_info =
127      description_->GetTransportInfoByName(content_name);
128  if (!transport_info) {
129    return false;
130  }
131
132  cricket::Candidate updated_candidate = candidate->candidate();
133  if (updated_candidate.username().empty()) {
134    updated_candidate.set_username(transport_info->description.ice_ufrag);
135  }
136  if (updated_candidate.password().empty()) {
137    updated_candidate.set_password(transport_info->description.ice_pwd);
138  }
139
140  candidate_collection_[mediasection_index].add(
141       new JsepIceCandidate(candidate->sdp_mid(),
142                            static_cast<int>(mediasection_index),
143                            updated_candidate));
144  return true;
145}
146
147size_t JsepSessionDescription::number_of_mediasections() const {
148  if (!description_)
149    return 0;
150  return description_->contents().size();
151}
152
153const IceCandidateCollection* JsepSessionDescription::candidates(
154    size_t mediasection_index) const {
155  if (mediasection_index >= candidate_collection_.size())
156    return NULL;
157  return &candidate_collection_[mediasection_index];
158}
159
160bool JsepSessionDescription::ToString(std::string* out) const {
161  if (!description_ || !out)
162    return false;
163  *out = SdpSerialize(*this);
164  return !out->empty();
165}
166
167bool JsepSessionDescription::GetMediasectionIndex(
168    const IceCandidateInterface* candidate,
169    size_t* index) {
170  if (!candidate || !index) {
171    return false;
172  }
173  *index = static_cast<size_t>(candidate->sdp_mline_index());
174  if (description_ && !candidate->sdp_mid().empty()) {
175    bool found = false;
176    // Try to match the sdp_mid with content name.
177    for (size_t i = 0; i < description_->contents().size(); ++i) {
178      if (candidate->sdp_mid() == description_->contents().at(i).name) {
179        *index = i;
180        found = true;
181        break;
182      }
183    }
184    if (!found) {
185      // If the sdp_mid is presented but we can't find a match, we consider
186      // this as an error.
187      return false;
188    }
189  }
190  return true;
191}
192
193}  // namespace webrtc
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