1 /*
2 * Copyright (C) 2012 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * 3. Neither the name of Google Inc. nor the names of its contributors
15 * may be used to endorse or promote products derived from this
16 * software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32
33 #include "modules/mediastream/MediaConstraintsImpl.h"
34
35 #include "bindings/core/v8/ArrayValue.h"
36 #include "bindings/core/v8/Dictionary.h"
37 #include "bindings/core/v8/ExceptionState.h"
38 #include "core/dom/ExceptionCode.h"
39 #include "wtf/HashMap.h"
40 #include "wtf/Vector.h"
41 #include "wtf/text/StringHash.h"
42
43 namespace blink {
44
45 namespace MediaConstraintsImpl {
46
parse(const Dictionary & constraintsDictionary,WebVector<WebMediaConstraint> & optional,WebVector<WebMediaConstraint> & mandatory)47 static bool parse(const Dictionary& constraintsDictionary, WebVector<WebMediaConstraint>& optional, WebVector<WebMediaConstraint>& mandatory)
48 {
49 if (constraintsDictionary.isUndefinedOrNull())
50 return true;
51
52 Vector<String> names;
53 constraintsDictionary.getOwnPropertyNames(names);
54
55 String mandatoryName("mandatory");
56 String optionalName("optional");
57
58 for (Vector<String>::iterator it = names.begin(); it != names.end(); ++it) {
59 if (*it != mandatoryName && *it != optionalName)
60 return false;
61 }
62
63 Vector<WebMediaConstraint> mandatoryConstraintsVector;
64 if (names.contains(mandatoryName)) {
65 Dictionary mandatoryConstraintsDictionary;
66 bool ok = constraintsDictionary.get(mandatoryName, mandatoryConstraintsDictionary);
67 if (!ok || mandatoryConstraintsDictionary.isUndefinedOrNull())
68 return false;
69
70 HashMap<String, String> mandatoryConstraintsHashMap;
71 ok = mandatoryConstraintsDictionary.getOwnPropertiesAsStringHashMap(mandatoryConstraintsHashMap);
72 if (!ok)
73 return false;
74
75 HashMap<String, String>::const_iterator iter = mandatoryConstraintsHashMap.begin();
76 for (; iter != mandatoryConstraintsHashMap.end(); ++iter)
77 mandatoryConstraintsVector.append(WebMediaConstraint(iter->key, iter->value));
78 }
79
80 Vector<WebMediaConstraint> optionalConstraintsVector;
81 if (names.contains(optionalName)) {
82 ArrayValue optionalConstraints;
83 bool ok = DictionaryHelper::get(constraintsDictionary, optionalName, optionalConstraints);
84 if (!ok || optionalConstraints.isUndefinedOrNull())
85 return false;
86
87 size_t numberOfConstraints;
88 ok = optionalConstraints.length(numberOfConstraints);
89 if (!ok)
90 return false;
91
92 for (size_t i = 0; i < numberOfConstraints; ++i) {
93 Dictionary constraint;
94 ok = optionalConstraints.get(i, constraint);
95 if (!ok || constraint.isUndefinedOrNull())
96 return false;
97 Vector<String> localNames;
98 constraint.getOwnPropertyNames(localNames);
99 if (localNames.size() != 1)
100 return false;
101 String key = localNames[0];
102 String value;
103 ok = DictionaryHelper::get(constraint, key, value);
104 if (!ok)
105 return false;
106 optionalConstraintsVector.append(WebMediaConstraint(key, value));
107 }
108 }
109
110 optional.assign(optionalConstraintsVector);
111 mandatory.assign(mandatoryConstraintsVector);
112 return true;
113 }
114
115
create(const Dictionary & constraintsDictionary,ExceptionState & exceptionState)116 WebMediaConstraints create(const Dictionary& constraintsDictionary, ExceptionState& exceptionState)
117 {
118 WebVector<WebMediaConstraint> optional;
119 WebVector<WebMediaConstraint> mandatory;
120 if (!parse(constraintsDictionary, optional, mandatory)) {
121 exceptionState.throwTypeError("Malformed constraints object.");
122 return WebMediaConstraints();
123 }
124
125 WebMediaConstraints constraints;
126 constraints.initialize(optional, mandatory);
127 return constraints;
128 }
129
create()130 WebMediaConstraints create()
131 {
132 WebMediaConstraints constraints;
133 constraints.initialize();
134 return constraints;
135 }
136
137 } // namespace MediaConstraintsImpl
138 } // namespace blink
139