libdcp, branch backport

Improve handling of image subtitle IDs in XML (DoM bug #1965)

2021-04-16T20:49:35Z

When reading/writing the XML for image subtitles, we assumed that the content of the tag is just the ID of the PNG in the MXF, without any prefix. DoM bug #1965 mentions a DCP where this is not the case, and SMPTE 429-5-2009 has an example where there is urn:uuid: in the XML. This change makes DoM write this urn:uuid: prefix, and accept it if it's present (but not complain if it's not). If the urn:uuid: _is_ required in the field, it's a bit surprising that nobody has complained up to this point. Maybe nobody noticed, or nobody reported it. Cherry-picked from 098007a1ee6a46b6ff11398f94faff5c85951da4 in master.

Ignore parameters in PKL type strings when checking them.

2021-04-16T20:49:26Z

Cherry-picked from 1ffc787c6318815592e8d81c4878488eb6183ca4 in master.

Rename write_subtitle_test -> shared_subtitle_test

2021-04-16T20:49:15Z

Cherry-picked from 66566512275d363f68781b9a47ade6967d09e676 in master.

Test reference updates.

2021-04-16T18:46:40Z

Move some tests from write_subtitle_test into interop_subtitle_test.

2021-04-16T17:47:34Z

Cherry-picked from 39e010ee51749198528f754c89e98b6d8fb123c4 in master.

Rename read_interop_subtitle_test -> interop_subtitle_test.

2021-04-16T15:46:46Z

Cherry-picked from 72d9cb462c03b1b41380e50ab9cccf2950207c18 in master.

Move some tests from write_subtitle_test to smpte_subtitle_test.

2021-04-16T15:46:38Z

Cherry-picked from 9e3f8bfe9e274865590d49ad1e59e82f7894a12a in master.

Merge read_smpte_subtitle_test with smpte_subtitle_test.

2021-04-16T15:29:35Z

Cherry-picked from 4e514f7dcc12a72bb4c78fd5067ff872ef54025b in master.

Fix erroneous reports of unresolved assets when checking OV/VF pairs.

2020-11-28T00:01:55Z

Test churn after adding a new one.

2020-10-10T19:07:02Z