Comparison against foo_out_upnp

[stewartsiu]

I'm starting a new thread to document my observations started in #108, where I described stuttering issues I found in swyh-rs but not in foobar2000's foo_out_upnp. It looks like a recent thread (#124) also mentioned comparison against foo_out_upnp. I managed to reproduce a side by side comparison of Wireshark captures of the two streaming the same content, where swyh-rs has stuttering but foo_out_upnp doesn't. two_pcap_files.zip testfoo2448.pcap is captured with directly playing the 24/48 content in foobar to the streamer. testfoo2448_swyh.pcap is captured with starting swyh-rs, and as soon as the streaming to renderer started, hitting play in foobar to primary sound output, which is then captured by swyh-rs. The version of swyh-rs cli I ran is one I compiled myself, with minor changes to headers and posts to make the output more similar to foo_out_upnp. The response header at packet 110 in test2448_swyh looks just like packet 71 in test2448, with no chunked transfer (previously thought to be an issue in #108)