1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* libjingle
* Copyright 2012 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "talk/app/webrtc/jsepsessiondescription.h"
#include "talk/app/webrtc/webrtcsdp.h"
#include "talk/session/media/mediasession.h"
#include "webrtc/base/stringencode.h"
using rtc::scoped_ptr;
using cricket::SessionDescription;
namespace webrtc {
static const char* kSupportedTypes[] = {
JsepSessionDescription::kOffer,
JsepSessionDescription::kPrAnswer,
JsepSessionDescription::kAnswer
};
static bool IsTypeSupported(const std::string& type) {
bool type_supported = false;
for (size_t i = 0; i < ARRAY_SIZE(kSupportedTypes); ++i) {
if (kSupportedTypes[i] == type) {
type_supported = true;
break;
}
}
return type_supported;
}
const char SessionDescriptionInterface::kOffer[] = "offer";
const char SessionDescriptionInterface::kPrAnswer[] = "pranswer";
const char SessionDescriptionInterface::kAnswer[] = "answer";
const int JsepSessionDescription::kDefaultVideoCodecId = 100;
// This is effectively a max value of the frame rate. 30 is default from camera.
const int JsepSessionDescription::kDefaultVideoCodecFramerate = 60;
const char JsepSessionDescription::kDefaultVideoCodecName[] = "VP8";
// Used as default max video codec size before we have it in signaling.
#if defined(ANDROID) || defined(WEBRTC_IOS)
// Limit default max video codec size for Android to avoid
// HW VP8 codec initialization failure for resolutions higher
// than 1280x720 or 720x1280.
// Same patch for iOS to support 720P in portrait mode.
const int JsepSessionDescription::kMaxVideoCodecWidth = 1280;
const int JsepSessionDescription::kMaxVideoCodecHeight = 1280;
#else
const int JsepSessionDescription::kMaxVideoCodecWidth = 1920;
const int JsepSessionDescription::kMaxVideoCodecHeight = 1080;
#endif
const int JsepSessionDescription::kDefaultVideoCodecPreference = 1;
SessionDescriptionInterface* CreateSessionDescription(const std::string& type,
const std::string& sdp,
SdpParseError* error) {
if (!IsTypeSupported(type)) {
return NULL;
}
JsepSessionDescription* jsep_desc = new JsepSessionDescription(type);
if (!jsep_desc->Initialize(sdp, error)) {
delete jsep_desc;
return NULL;
}
return jsep_desc;
}
JsepSessionDescription::JsepSessionDescription(const std::string& type)
: type_(type) {
}
JsepSessionDescription::~JsepSessionDescription() {}
bool JsepSessionDescription::Initialize(
cricket::SessionDescription* description,
const std::string& session_id,
const std::string& session_version) {
if (!description)
return false;
session_id_ = session_id;
session_version_ = session_version;
description_.reset(description);
candidate_collection_.resize(number_of_mediasections());
return true;
}
bool JsepSessionDescription::Initialize(const std::string& sdp,
SdpParseError* error) {
return SdpDeserialize(sdp, this, error);
}
bool JsepSessionDescription::AddCandidate(
const IceCandidateInterface* candidate) {
if (!candidate || candidate->sdp_mline_index() < 0)
return false;
size_t mediasection_index = 0;
if (!GetMediasectionIndex(candidate, &mediasection_index)) {
return false;
}
if (mediasection_index >= number_of_mediasections())
return false;
const std::string& content_name =
description_->contents()[mediasection_index].name;
const cricket::TransportInfo* transport_info =
description_->GetTransportInfoByName(content_name);
if (!transport_info) {
return false;
}
cricket::Candidate updated_candidate = candidate->candidate();
if (updated_candidate.username().empty()) {
updated_candidate.set_username(transport_info->description.ice_ufrag);
}
if (updated_candidate.password().empty()) {
updated_candidate.set_password(transport_info->description.ice_pwd);
}
scoped_ptr<JsepIceCandidate> updated_candidate_wrapper(
new JsepIceCandidate(candidate->sdp_mid(),
static_cast<int>(mediasection_index),
updated_candidate));
if (!candidate_collection_[mediasection_index].HasCandidate(
updated_candidate_wrapper.get()))
candidate_collection_[mediasection_index].add(
updated_candidate_wrapper.release());
return true;
}
size_t JsepSessionDescription::number_of_mediasections() const {
if (!description_)
return 0;
return description_->contents().size();
}
const IceCandidateCollection* JsepSessionDescription::candidates(
size_t mediasection_index) const {
if (mediasection_index >= candidate_collection_.size())
return NULL;
return &candidate_collection_[mediasection_index];
}
bool JsepSessionDescription::ToString(std::string* out) const {
if (!description_ || !out)
return false;
*out = SdpSerialize(*this);
return !out->empty();
}
bool JsepSessionDescription::GetMediasectionIndex(
const IceCandidateInterface* candidate,
size_t* index) {
if (!candidate || !index) {
return false;
}
*index = static_cast<size_t>(candidate->sdp_mline_index());
if (description_ && !candidate->sdp_mid().empty()) {
bool found = false;
// Try to match the sdp_mid with content name.
for (size_t i = 0; i < description_->contents().size(); ++i) {
if (candidate->sdp_mid() == description_->contents().at(i).name) {
*index = i;
found = true;
break;
}
}
if (!found) {
// If the sdp_mid is presented but we can't find a match, we consider
// this as an error.
return false;
}
}
return true;
}
} // namespace webrtc
|
