Non-constraint interfaces for all constrainable interfaces

webrtc/api/mediaconstraintsinterface.cc

Index: webrtc/api/mediaconstraintsinterface.cc
diff --git a/webrtc/api/mediaconstraintsinterface.cc b/webrtc/api/mediaconstraintsinterface.cc
index b0a68b15b0b31b75ea754e62647d5510413dbe21..4e968aca93274f1c4bd85df2bcbd3c9c7a1d97ed 100644
--- a/webrtc/api/mediaconstraintsinterface.cc
+++ b/webrtc/api/mediaconstraintsinterface.cc
@@ -10,6 +10,7 @@
 
 #include "webrtc/api/mediaconstraintsinterface.h"
 
+#include "webrtc/api/peerconnectioninterface.h"
 #include "webrtc/base/stringencode.h"
 
 namespace webrtc {
@@ -118,8 +119,30 @@ bool FindConstraint(const MediaConstraintsInterface* constraints,
     return false;
   }
   if (constraints->GetMandatory().FindFirst(key, &string_value)) {
-    if (mandatory_constraints)
+    if (mandatory_constraints) {
       ++*mandatory_constraints;
+    }
+    return rtc::FromString(string_value, value);
+  }
+  if (constraints->GetOptional().FindFirst(key, &string_value)) {
+    return rtc::FromString(string_value, value);
+  }
+  return false;
+}
+
+// As above, but for integers.
+bool FindConstraint(const MediaConstraintsInterface* constraints,
+                    const std::string& key,
+                    int* 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 rtc::FromString(string_value, value);
   }
   if (constraints->GetOptional().FindFirst(key, &string_value)) {
@@ -128,4 +151,63 @@ bool FindConstraint(const MediaConstraintsInterface* constraints,
   return false;
 }
 
+rtc::Optional<bool> ConstraintToOptionalBool(
+    const MediaConstraintsInterface* constraints,
+    const std::string& key) {
+  bool value;
+  bool present = FindConstraint(constraints, key, &value, nullptr);
+  if (present) {
+    return rtc::Optional<bool>(value);
+  }
+  return rtc::Optional<bool>();
+}
+
+rtc::Optional<int> ConstraintToOptionalInt(
+    const MediaConstraintsInterface* constraints,
+    const std::string& key) {
+  int value;
+  bool present = FindConstraint(constraints, key, &value, nullptr);
+  if (present) {
+    return rtc::Optional<int>(value);
+  }
+  return rtc::Optional<int>();
+}
+
+void CopyConstraintsIntoRtcConfiguration(
+    const MediaConstraintsInterface* constraints,
+    PeerConnectionInterface::RTCConfiguration* configuration) {
+  // Copy info from constraints into configuration, if present.
+  if (!constraints) {
+    return;
+  }
+
+  bool value;
+  if (FindConstraint(constraints, MediaConstraintsInterface::kEnableIPv6,
+                     &value, nullptr)) {
+    if (!value) {
+      configuration->disable_ipv6 = true;
+    }
+  }
+  configuration->enable_dscp = ConstraintToOptionalBool(
+      constraints, MediaConstraintsInterface::kEnableDscp);
+  configuration->cpu_overuse_detection = ConstraintToOptionalBool(
+      constraints, MediaConstraintsInterface::kCpuOveruseDetection);
+  if (FindConstraint(constraints,
+                     MediaConstraintsInterface::kEnableRtpDataChannels, &value,
+                     NULL) &&
+      value) {
+    configuration->enable_rtp_data_channel = true;
+  }
+  // Find Suspend Below Min Bitrate constraint.
+  configuration->suspend_below_min_bitrate = ConstraintToOptionalBool(
+      constraints,
+      MediaConstraintsInterface::kEnableVideoSuspendBelowMinBitrate);
+  configuration->screencast_min_bitrate = ConstraintToOptionalInt(
+      constraints, MediaConstraintsInterface::kScreencastMinBitrate);
+  configuration->combined_audio_video_bwe = ConstraintToOptionalBool(
+      constraints, MediaConstraintsInterface::kCombinedAudioVideoBwe);
+  configuration->enable_dtls_srtp = ConstraintToOptionalBool(
+      constraints, MediaConstraintsInterface::kEnableDtlsSrtp);
+}
+
 }  // namespace webrtc