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      1 // Copyright (c) 2012 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 #include "content/renderer/media/rtc_media_constraints.h"
      5 
      6 #include "base/logging.h"
      7 #include "base/strings/string_util.h"
      8 #include "content/common/media/media_stream_options.h"
      9 #include "third_party/WebKit/public/platform/WebMediaConstraints.h"
     10 #include "third_party/WebKit/public/platform/WebCString.h"
     11 #include "third_party/WebKit/public/platform/WebString.h"
     12 
     13 namespace content {
     14 namespace {
     15 
     16 void GetNativeMediaConstraints(
     17     const WebKit::WebVector<WebKit::WebMediaConstraint>& constraints,
     18     webrtc::MediaConstraintsInterface::Constraints* native_constraints) {
     19   DCHECK(native_constraints);
     20   for (size_t i = 0; i < constraints.size(); ++i) {
     21     webrtc::MediaConstraintsInterface::Constraint new_constraint;
     22     new_constraint.key = constraints[i].m_name.utf8();
     23     new_constraint.value = constraints[i].m_value.utf8();
     24 
     25     // Ignore Chrome specific Tab capture constraints.
     26     if (new_constraint.key == kMediaStreamSource ||
     27         new_constraint.key == kMediaStreamSourceId)
     28       continue;
     29 
     30     // Ignore internal constraints set by JS.
     31     // TODO(jiayl): replace the hard coded string with
     32     // webrtc::MediaConstraintsInterface::kInternalConstraintPrefix when
     33     // the Libjingle change is rolled.
     34     if (StartsWithASCII(new_constraint.key, "internal", true))
     35       continue;
     36 
     37     DVLOG(3) << "MediaStreamConstraints:" << new_constraint.key
     38              << " : " <<  new_constraint.value;
     39     native_constraints->push_back(new_constraint);
     40   }
     41 }
     42 
     43 }  // namespace
     44 
     45 RTCMediaConstraints::RTCMediaConstraints(
     46       const WebKit::WebMediaConstraints& constraints) {
     47   if (constraints.isNull())
     48     return;  // Will happen in unit tests.
     49   WebKit::WebVector<WebKit::WebMediaConstraint> mandatory;
     50   constraints.getMandatoryConstraints(mandatory);
     51   GetNativeMediaConstraints(mandatory, &mandatory_);
     52   WebKit::WebVector<WebKit::WebMediaConstraint> optional;
     53   constraints.getOptionalConstraints(optional);
     54   GetNativeMediaConstraints(optional, &optional_);
     55 }
     56 
     57 RTCMediaConstraints::~RTCMediaConstraints() {}
     58 
     59 const webrtc::MediaConstraintsInterface::Constraints&
     60 RTCMediaConstraints::GetMandatory() const  {
     61   return mandatory_;
     62 }
     63 
     64 const webrtc::MediaConstraintsInterface::Constraints&
     65 RTCMediaConstraints::GetOptional() const {
     66   return optional_;
     67 }
     68 
     69 void RTCMediaConstraints::AddOptional(const std::string& key,
     70                                       const std::string& value) {
     71   optional_.push_back(Constraint(key, value));
     72 }
     73 
     74 }  // namespace content
     75