1 files changed, 131 insertions, 0 deletions
diff --git a/media/webrtc/signaling/src/sdp/SdpHelper.h b/media/webrtc/signaling/src/sdp/SdpHelper.h
new file mode 100644
index 000000000..21940f280
--- /dev/null
+++ b/media/webrtc/signaling/src/sdp/SdpHelper.h
@@ -0,0 +1,131 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef _SDPHELPER_H_
+#define _SDPHELPER_H_
+
+#include "nsError.h"
+
+#include "signaling/src/sdp/SdpMediaSection.h"
+#include "signaling/src/sdp/SdpAttribute.h"
+
+#include "m_cpp_utils.h"
+
+#include <string>
+#include <map>
+#include <vector>
+
+namespace mozilla {
+class SdpMediaSection;
+class Sdp;
+
+class SdpHelper {
+  public:
+    enum MsectionBundleType {
+      kNoBundle,
+      kSlaveBundle,
+      kMasterBundle
+    };
+
+    // Takes a std::string* into which error strings will be written for the
+    // lifetime of the SdpHelper.
+    explicit SdpHelper(std::string* errorDest) : mLastError(*errorDest) {}
+    ~SdpHelper() {}
+
+    nsresult GetComponent(const std::string& candidate, size_t* component);
+    nsresult CopyTransportParams(size_t numComponents,
+                                 const SdpMediaSection& source,
+                                 SdpMediaSection* dest);
+    bool AreOldTransportParamsValid(const Sdp& oldAnswer,
+                                    const Sdp& offerersPreviousSdp,
+                                    const Sdp& newOffer,
+                                    size_t level);
+    bool IceCredentialsDiffer(const SdpMediaSection& msection1,
+                              const SdpMediaSection& msection2);
+
+    bool MsectionIsDisabled(const SdpMediaSection& msection) const;
+    static void DisableMsection(Sdp* sdp, SdpMediaSection* msection);
+
+    // Maps each mid to the m-section that is the master of its bundle.
+    // Mids that do not appear in an a=group:BUNDLE do not appear here.
+    typedef std::map<std::string, const SdpMediaSection*> BundledMids;
+
+    nsresult GetBundledMids(const Sdp& sdp, BundledMids* bundledMids);
+
+    bool IsBundleSlave(const Sdp& localSdp, uint16_t level);
+    void GetBundleGroups(
+        const Sdp& sdp,
+        std::vector<SdpGroupAttributeList::Group>* groups) const;
+
+    nsresult GetMidFromLevel(const Sdp& sdp,
+                             uint16_t level,
+                             std::string* mid);
+    nsresult GetIdsFromMsid(const Sdp& sdp,
+                            const SdpMediaSection& msection,
+                            std::string* streamId,
+                            std::string* trackId);
+    nsresult GetMsids(const SdpMediaSection& msection,
+                      std::vector<SdpMsidAttributeList::Msid>* msids);
+    nsresult ParseMsid(const std::string& msidAttribute,
+                       std::string* streamId,
+                       std::string* trackId);
+    nsresult AddCandidateToSdp(Sdp* sdp,
+                               const std::string& candidate,
+                               const std::string& mid,
+                               uint16_t level);
+    void SetIceGatheringComplete(Sdp* sdp,
+                                 uint16_t level,
+                                 BundledMids bundledMids);
+    void SetDefaultAddresses(const std::string& defaultCandidateAddr,
+                             uint16_t defaultCandidatePort,
+                             const std::string& defaultRtcpCandidateAddr,
+                             uint16_t defaultRtcpCandidatePort,
+                             Sdp* sdp,
+                             uint16_t level,
+                             BundledMids bundledMids);
+    void SetDefaultAddresses(const std::string& defaultCandidateAddr,
+                             uint16_t defaultCandidatePort,
+                             const std::string& defaultRtcpCandidateAddr,
+                             uint16_t defaultRtcpCandidatePort,
+                             SdpMediaSection* msection);
+    void SetupMsidSemantic(const std::vector<std::string>& msids,
+                           Sdp* sdp) const;
+    MsectionBundleType GetMsectionBundleType(const Sdp& sdp,
+                                             uint16_t level,
+                                             BundledMids& bundledMids,
+                                             std::string* masterMid) const;
+
+    std::string GetCNAME(const SdpMediaSection& msection) const;
+
+    SdpMediaSection* FindMsectionByMid(Sdp& sdp,
+                                       const std::string& mid) const;
+
+    const SdpMediaSection* FindMsectionByMid(const Sdp& sdp,
+                                             const std::string& mid) const;
+
+    nsresult CopyStickyParams(const SdpMediaSection& source,
+                              SdpMediaSection* dest);
+    bool HasRtcp(SdpMediaSection::Protocol proto) const;
+    static SdpMediaSection::Protocol GetProtocolForMediaType(
+        SdpMediaSection::MediaType type);
+    void appendSdpParseErrors(
+          const std::vector<std::pair<size_t, std::string> >& aErrors,
+          std::string* aErrorString);
+
+    static bool GetPtAsInt(const std::string& ptString, uint16_t* ptOutparam);
+
+    void AddCommonExtmaps(
+        const SdpMediaSection& remoteMsection,
+        const std::vector<SdpExtmapAttributeList::Extmap>& localExtensions,
+        SdpMediaSection* localMsection);
+
+  private:
+    std::string& mLastError;
+
+    DISALLOW_COPY_ASSIGN(SdpHelper);
+};
+} // namespace mozilla
+
+#endif // _SDPHELPER_H_
+