| /* |
| * libjingle |
| * Copyright 2013, 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/mediaconstraintsinterface.h" |
| |
| #include "talk/base/stringencode.h" |
| |
| namespace webrtc { |
| |
| const char MediaConstraintsInterface::kValueTrue[] = "true"; |
| const char MediaConstraintsInterface::kValueFalse[] = "false"; |
| |
| // Set |value| to the value associated with the first appearance of |key|, or |
| // return false if |key| is not found. |
| bool MediaConstraintsInterface::Constraints::FindFirst( |
| const std::string& key, std::string* value) const { |
| for (Constraints::const_iterator iter = begin(); iter != end(); ++iter) { |
| if (iter->key == key) { |
| *value = iter->value; |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| // Find the highest-priority instance of the boolean-valued constraint) named by |
| // |key| and return its value as |value|. |constraints| can be null. |
| // If |mandatory_constraints| is non-null, it is incremented if the key appears |
| // among the mandatory constraints. |
| // Returns true if the key was found and has a valid boolean value. |
| // If the key appears multiple times as an optional constraint, appearances |
| // after the first are ignored. |
| // Note: Because this uses FindFirst, repeated optional constraints whose |
| // first instance has an unrecognized value are not handled precisely in |
| // accordance with the specification. |
| bool FindConstraint(const MediaConstraintsInterface* constraints, |
| const std::string& key, bool* value, |
| size_t* mandatory_constraints) { |
| std::string string_value; |
| if (!constraints) { |
| return false; |
| } |
| if (constraints->GetMandatory().FindFirst(key, &string_value)) { |
| if (mandatory_constraints) |
| ++*mandatory_constraints; |
| return talk_base::FromString(string_value, value); |
| } |
| if (constraints->GetOptional().FindFirst(key, &string_value)) { |
| return talk_base::FromString(string_value, value); |
| } |
| return false; |
| } |
| |
| } // namespace webrtc |