rtp: Add lua script to split a trace by SSRC/streams
This can be used to replay RTP streams with more or less the
same timing as the original one.
diff --git a/openbsc/contrib/rtp/timestamp_rtp.lua b/openbsc/contrib/rtp/timestamp_rtp.lua
new file mode 100644
index 0000000..c18a06b
--- /dev/null
+++ b/openbsc/contrib/rtp/timestamp_rtp.lua
@@ -0,0 +1,28 @@
+print("Ni hao")
+
+
+do
+ local tap = Listener.new("ip", "rtp")
+ local rtp_ssrc = Field.new("rtp.ssrc")
+ local frame_time = Field.new("frame.time_relative")
+ local rtp = Field.new("rtp")
+
+ function tap.packet(pinfo, tvb, ip)
+ local ip_src, ip_dst = tostring(ip.ip_src), tostring(ip.ip_dst)
+ local rtp_data = rtp()
+ local filename = "rtp_ssrc" .. rtp_ssrc() "_src_" .. ip_src .. "_to_" .. ip_dst .. ".state"
+ local f = io.open(filename, "a")
+
+ f:write(tostring(frame_time()) .. " ")
+ f:write(tostring(rtp_data.value))
+ f:write("\n")
+ f:close()
+ end
+
+ function tap.draw()
+ print("DRAW")
+ end
+ function tap.reset()
+ print("RESET")
+ end
+end