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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "content/renderer/media/media_stream_constraints_util.h" |
| 6 |
| 7 #include <sstream> |
| 8 |
| 9 #include "base/strings/string_number_conversions.h" |
| 10 #include "base/strings/utf_string_conversions.h" |
| 11 #include "third_party/WebKit/public/platform/WebMediaConstraints.h" |
| 12 #include "third_party/WebKit/public/platform/WebString.h" |
| 13 |
| 14 namespace content { |
| 15 |
| 16 namespace { |
| 17 |
| 18 // Convert a string ("true", "false") to a boolean. |
| 19 bool FromString(const std::string& string, bool* value) { |
| 20 std::istringstream iss(string); |
| 21 iss >> std::boolalpha >> *value; |
| 22 return !iss.fail(); |
| 23 } |
| 24 |
| 25 } // namespace |
| 26 |
| 27 bool GetConstraintValue(const blink::WebMediaConstraints& constraints, |
| 28 const std::string& key, |
| 29 bool* value) { |
| 30 return GetMandatoryConstraintValue(constraints, key, value) || |
| 31 GetOptionalConstraintValue(constraints, key, value); |
| 32 } |
| 33 |
| 34 bool GetConstraintValue(const blink::WebMediaConstraints& constraints, |
| 35 const std::string& key, |
| 36 int* value) { |
| 37 return GetMandatoryConstraintValue(constraints, key, value) || |
| 38 GetOptionalConstraintValue(constraints, key, value); |
| 39 } |
| 40 |
| 41 bool GetConstraintValue(const blink::WebMediaConstraints& constraints, |
| 42 const std::string& key, |
| 43 std::string* value) { |
| 44 blink::WebString value_str; |
| 45 if (!constraints.getMandatoryConstraintValue(base::UTF8ToUTF16(key), |
| 46 value_str) && |
| 47 !constraints.getOptionalConstraintValue(base::UTF8ToUTF16(key), |
| 48 value_str)) { |
| 49 return false; |
| 50 } |
| 51 |
| 52 *value = value_str.utf8(); |
| 53 return true; |
| 54 } |
| 55 |
| 56 bool GetMandatoryConstraintValue(const blink::WebMediaConstraints& constraints, |
| 57 const std::string& key, |
| 58 bool* value) { |
| 59 blink::WebString value_str; |
| 60 if (!constraints.getMandatoryConstraintValue(base::UTF8ToUTF16(key), |
| 61 value_str)) { |
| 62 return false; |
| 63 } |
| 64 |
| 65 return FromString(value_str.utf8(), value); |
| 66 } |
| 67 |
| 68 bool GetMandatoryConstraintValue(const blink::WebMediaConstraints& constraints, |
| 69 const std::string& key, |
| 70 int* value) { |
| 71 blink::WebString value_str; |
| 72 if (!constraints.getMandatoryConstraintValue(base::UTF8ToUTF16(key), |
| 73 value_str)) { |
| 74 return false; |
| 75 } |
| 76 |
| 77 return base::StringToInt(value_str.utf8(), value); |
| 78 } |
| 79 |
| 80 bool GetOptionalConstraintValue(const blink::WebMediaConstraints& constraints, |
| 81 const std::string& key, |
| 82 bool* value) { |
| 83 blink::WebString value_str; |
| 84 if (!constraints.getOptionalConstraintValue(base::UTF8ToUTF16(key), |
| 85 value_str)) { |
| 86 return false; |
| 87 } |
| 88 |
| 89 return FromString(value_str.utf8(), value); |
| 90 } |
| 91 |
| 92 bool GetOptionalConstraintValue(const blink::WebMediaConstraints& constraints, |
| 93 const std::string& key, |
| 94 int* value) { |
| 95 blink::WebString value_str; |
| 96 if (!constraints.getOptionalConstraintValue(base::UTF8ToUTF16(key), |
| 97 value_str)) { |
| 98 return false; |
| 99 } |
| 100 |
| 101 return base::StringToInt(value_str.utf8(), value); |
| 102 } |
| 103 |
| 104 } // namespace content |
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