rtcp: Add possibility for the user to provide SDES items

include/uvgrtp/rtcp.hh

@@ -121,6 +121,9 @@ namespace uvgrtp {
              */
             rtp_error_t send_sdes_packet(const std::vector<uvgrtp::frame::rtcp_sdes_item>& items);
 
+
+            rtp_error_t set_sdes_items(const std::vector<uvgrtp::frame::rtcp_sdes_item>& items);
+
             /**
              * \brief Send an RTCP APP packet
              *
@@ -464,7 +467,10 @@ namespace uvgrtp {
 
             int interval_ms_;
 
-            std::string cname_;
+            std::vector<uvgrtp::frame::rtcp_sdes_item> ourItems_;
+
+            uvgrtp::frame::rtcp_sdes_item cnameItem_;
+            char cname_[255];
     };
 }
 

src/rtcp.cc

@@ -63,6 +63,21 @@ uvgrtp::rtcp::rtcp(std::shared_ptr<uvgrtp::rtp> rtp, std::string cname, int flag
     srtcp_        = nullptr;
 
     zero_stats(&our_stats);
+
+    if (cname.length() > 255)
+    {
+        LOG_ERROR("Our CName is too long");
+    }
+    else
+    {
+        // items should not have null termination
+        const char* c = cname.c_str();
+        memcpy(cname_, c, cname.length());
+        uint8_t length = cname.length();
+
+        cnameItem_ = { 1, length, (void*)cname_ };
+        ourItems_.push_back(cnameItem_);
+    }
 }
 
 uvgrtp::rtcp::rtcp(std::shared_ptr<uvgrtp::rtp> rtp, std::string cname, 
@@ -78,6 +93,8 @@ uvgrtp::rtcp::~rtcp()
     {
         stop();
     }
+
+    ourItems_.clear();
 }
 
 void uvgrtp::rtcp::free_participant(rtcp_participant* participant)
@@ -223,6 +240,31 @@ void uvgrtp::rtcp::rtcp_runner(rtcp* rtcp, int interval)
     }
 }
 
+rtp_error_t uvgrtp::rtcp::set_sdes_items(const std::vector<uvgrtp::frame::rtcp_sdes_item>& items)
+{
+    bool hasCname = false;
+
+    for (auto& item : items)
+    {
+        if (item.type == 1)
+        {
+            hasCname = true;
+            LOG_DEBUG("Found CName in sdes items, not adding pregenerated");
+            break;
+        }
+    }
+
+    ourItems_.clear();
+    if (!hasCname)
+    {
+        ourItems_.push_back(cnameItem_);
+    }
+
+    ourItems_.insert(ourItems_.end(), items.begin(), items.end());
+
+    return RTP_OK;
+}
+
 rtp_error_t uvgrtp::rtcp::add_participant(std::string dst_addr, uint16_t dst_port, uint16_t src_port, uint32_t clock_rate)
 {
     if (dst_addr == "" || !dst_port || !src_port)