Add mux-stream transport support in session description

remoting/protocol/content_description.cc

Index: remoting/protocol/content_description.cc
diff --git a/remoting/protocol/content_description.cc b/remoting/protocol/content_description.cc
index 70ba05b570ae48b4747ec83b0f998368fff7562a..9f7d5d54f0f30c2285bc4dbf25125838461f67ee 100644
--- a/remoting/protocol/content_description.cc
+++ b/remoting/protocol/content_description.cc
@@ -8,6 +8,7 @@
 #include "base/string_number_conversions.h"
 #include "remoting/base/constants.h"
 #include "remoting/protocol/authenticator.h"
+#include "remoting/protocol/name_value_map.h"
 #include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
 
 using buzz::QName;
@@ -36,45 +37,19 @@ const char kCodecAttr[] = "codec";
 const char kDeprecatedWidthAttr[] = "width";
 const char kDeprecatedHeightAttr[] = "height";
 
-const char kStreamTransport[] = "stream";
-const char kDatagramTransport[] = "datagram";
-const char kNoneTransport[] = "none";
-
-const char kVerbatimCodec[] = "verbatim";
-const char kVp8Codec[] = "vp8";
-const char kZipCodec[] = "zip";
-const char kVorbisCodec[] = "vorbis";
-
-const char* GetTransportName(ChannelConfig::TransportType type) {
-  switch (type) {
-    case ChannelConfig::TRANSPORT_STREAM:
-      return kStreamTransport;
-    case ChannelConfig::TRANSPORT_DATAGRAM:
-      return kDatagramTransport;
-    case ChannelConfig::TRANSPORT_NONE:
-      return kNoneTransport;
-  }
-  NOTREACHED();
-  return NULL;
-}
-
-const char* GetCodecName(ChannelConfig::Codec type) {
-  switch (type) {
-    case ChannelConfig::CODEC_VERBATIM:
-      return kVerbatimCodec;
-    case ChannelConfig::CODEC_VP8:
-      return kVp8Codec;
-    case ChannelConfig::CODEC_ZIP:
-      return kZipCodec;
-    case ChannelConfig::CODEC_VORBIS:
-      return kVorbisCodec;
-    default:
-      break;
-  }
-  NOTREACHED();
-  return NULL;
-}
+const NameMapElement<ChannelConfig::TransportType> kTransports[] = {
+  { ChannelConfig::TRANSPORT_STREAM, "stream" },
+  { ChannelConfig::TRANSPORT_MUX_STREAM, "mux-stream" },
+  { ChannelConfig::TRANSPORT_DATAGRAM, "datagram" },
+  { ChannelConfig::TRANSPORT_NONE, "none" },
+};
 
+const NameMapElement<ChannelConfig::Codec> kCodecs[] = {
+  { ChannelConfig::CODEC_VERBATIM, "verbatim" },
+  { ChannelConfig::CODEC_VP8, "vp8" },
+  { ChannelConfig::CODEC_ZIP, "zip" },
+  { ChannelConfig::CODEC_VORBIS, "vorbis" },
+};
 
 // Format a channel configuration tag for chromotocol session description,
 // e.g. for video channel:
@@ -85,61 +60,33 @@ XmlElement* FormatChannelConfig(const ChannelConfig& config,
       QName(kChromotingXmlNamespace, tag_name));
 
   result->AddAttr(QName(kDefaultNs, kTransportAttr),
-                   GetTransportName(config.transport));
+                  ValueToName(kTransports, config.transport));
 
   result->AddAttr(QName(kDefaultNs, kVersionAttr),
                   base::IntToString(config.version));
 
   if (config.codec != ChannelConfig::CODEC_UNDEFINED) {
     result->AddAttr(QName(kDefaultNs, kCodecAttr),
-                    GetCodecName(config.codec));
+                    ValueToName(kCodecs, config.codec));
   }
 
   return result;
 }
 
-bool ParseTransportName(const std::string& value,
-                        ChannelConfig::TransportType* transport) {
-  if (value == kStreamTransport) {
-    *transport = ChannelConfig::TRANSPORT_STREAM;
-  } else if (value == kDatagramTransport) {
-    *transport = ChannelConfig::TRANSPORT_DATAGRAM;
-  } else if (value == kNoneTransport) {
-    *transport = ChannelConfig::TRANSPORT_NONE;
-  } else {
-    return false;
-  }
-  return true;
-}
-
-bool ParseCodecName(const std::string& value, ChannelConfig::Codec* codec) {
-  if (value == kVerbatimCodec) {
-    *codec = ChannelConfig::CODEC_VERBATIM;
-  } else if (value == kVp8Codec) {
-    *codec = ChannelConfig::CODEC_VP8;
-  } else if (value == kZipCodec) {
-    *codec = ChannelConfig::CODEC_ZIP;
-  } else if (value == kVorbisCodec) {
-    *codec = ChannelConfig::CODEC_VORBIS;
-  } else {
-    return false;
-  }
-  return true;
-}
-
 // Returns false if the element is invalid.
 bool ParseChannelConfig(const XmlElement* element, bool codec_required,
                         ChannelConfig* config) {
-  if (!ParseTransportName(element->Attr(QName(kDefaultNs, kTransportAttr)),
-                          &config->transport) ||
+  if (!NameToValue(
+          kTransports, element->Attr(QName(kDefaultNs, kTransportAttr)),
+          &config->transport) ||
       !base::StringToInt(element->Attr(QName(kDefaultNs, kVersionAttr)),
                          &config->version)) {
     return false;
   }
 
   if (codec_required) {
-    if (!ParseCodecName(element->Attr(QName(kDefaultNs, kCodecAttr)),
-                        &config->codec)) {
+    if (!NameToValue(kCodecs, element->Attr(QName(kDefaultNs, kCodecAttr)),
+                     &config->codec)) {
       return false;
     }
   } else {