content/renderer/media/rtc_media_constraints.cc

   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 <string>
   7
   8 #include "base/logging.h"
   9 #include "base/strings/string_util.h"
  10 #include "content/common/media/media_stream_options.h"
  11 #include "content/renderer/media/media_stream_video_source.h"
  12 #include "third_party/WebKit/public/platform/WebMediaConstraints.h"
  13 #include "third_party/WebKit/public/platform/WebCString.h"
  14 #include "third_party/WebKit/public/platform/WebString.h"
  15
  16 namespace content {
  17 namespace {
  18
  19 void GetNativeMediaConstraints(
  20     const blink::WebVector<blink::WebMediaConstraint>& constraints,
  21     webrtc::MediaConstraintsInterface::Constraints* native_constraints) {
  22   DCHECK(native_constraints);
  23   for (size_t i = 0; i < constraints.size(); ++i) {
  24     webrtc::MediaConstraintsInterface::Constraint new_constraint;
  25     new_constraint.key = constraints[i].m_name.utf8();
  26     new_constraint.value = constraints[i].m_value.utf8();
  27
  28     // Ignore Chrome specific Tab capture constraints.
  29     if (new_constraint.key == kMediaStreamSource ||
  30         new_constraint.key == kMediaStreamSourceId)
  31       continue;
  32
  33     // Ignore sourceId constraint since that has nothing to do with webrtc.
  34     if (new_constraint.key == kMediaStreamSourceInfoId)
  35       continue;
  36
  37     // Ignore constraints that are handled by Chrome in MediaStreamVideoSource.
  38     if (MediaStreamVideoSource::IsConstraintSupported(new_constraint.key))
  39       continue;
  40
  41     DVLOG(3) << "MediaStreamConstraints:" << new_constraint.key
  42              << " : " <<  new_constraint.value;
  43     native_constraints->push_back(new_constraint);
  44   }
  45 }
  46
  47 }  // namespace
  48
  49 RTCMediaConstraints::RTCMediaConstraints() {}
  50
  51 RTCMediaConstraints::RTCMediaConstraints(
  52       const blink::WebMediaConstraints& constraints) {
  53   if (constraints.isNull())
  54     return;  // Will happen in unit tests.
  55   blink::WebVector<blink::WebMediaConstraint> mandatory;
  56   constraints.getMandatoryConstraints(mandatory);
  57   GetNativeMediaConstraints(mandatory, &mandatory_);
  58   blink::WebVector<blink::WebMediaConstraint> optional;
  59   constraints.getOptionalConstraints(optional);
  60   GetNativeMediaConstraints(optional, &optional_);
  61 }
  62
  63 RTCMediaConstraints::~RTCMediaConstraints() {}
  64
  65 const webrtc::MediaConstraintsInterface::Constraints&
  66 RTCMediaConstraints::GetMandatory() const  {
  67   return mandatory_;
  68 }
  69
  70 const webrtc::MediaConstraintsInterface::Constraints&
  71 RTCMediaConstraints::GetOptional() const {
  72   return optional_;
  73 }
  74
  75 bool RTCMediaConstraints::AddOptional(const std::string& key,
  76                                       const std::string& value,
  77                                       bool override_if_exists) {
  78   return AddConstraint(&optional_, key, value, override_if_exists);
  79 }
  80
  81 bool RTCMediaConstraints::AddMandatory(const std::string& key,
  82                                        const std::string& value,
  83                                        bool override_if_exists) {
  84   return AddConstraint(&mandatory_, key, value, override_if_exists);
  85 }
  86
  87 bool RTCMediaConstraints::AddConstraint(Constraints* constraints,
  88                                         const std::string& key,
  89                                         const std::string& value,
  90                                         bool override_if_exists) {
  91   for (Constraints::iterator iter = constraints->begin();
  92        iter != constraints->end();
  93        ++iter) {
  94     if (iter->key == key) {
  95       if (override_if_exists)
  96         iter->value = value;
  97       return override_if_exists;
  98     }
  99   }
 100   // The key wasn't found, add it.
 101   constraints->push_back(Constraint(key, value));
 102   return true;
 103 }
 104
 105 }  // namespace content