DSD Files: audio/x-dsf vs. audio/dsd MIME type (was Add DLNA.ORG_PN parameter)

[witom]

Minimserver parses and indexes correctly tags of .dsf audio files (DSD format) and sends to UPnP browser. Though, with some stricter endpoints (tested on Sony STR-DN1070), all DSF files are missing in the displayed media list. When debugging the issue I discovered that DLNA.ORG_PN parameter is missing in the DIDL-Lite response for that file type:


===
propName=logLevel propValue=trace
...
... protocolInfo="http-get:*:audio/x-dsf:DLNA.ORG_OP=01;DLNA.ORG_FLAGS=01700000000000000000000000000000" ...
===


DLNA guideline states:
===
The pn-param (DLNA.ORG_PN) is the only required parameter for DLNA Media Format Profiles. All
other parameters and flags are optional for the syntax.
===

I understand that DSD/DSF is missing from DLNA standard, but seemingly at least some capable devices expect to have that header to conform to protocol spec.
Some other servers are sending

===
protocolInfo="http-get:*:audio/dsd:DLNA.ORG_PN=DSF;DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=01500000000000000000000000000000"
===

and that works flawlessly on Sony mid-range semi-fresh hardware.

Please consider fixing, should be fairly easy!!

Thanks!