libdcp/src/dcp_time.cc, branch mac-tests

Fix various bugs in subtitle/ccap verification.

2021-03-15T00:36:51Z

Check that subtitles don't overlap reel boundaries, and fix a few tests that trip this check. Fix confusion when calculating subtitle timings during verification where the picture asset frame rate was being used rather than the subtitle asset's edit rate. Do the subtitle timing verification for Interop as well as SMPTE subtitles. Take tags into account when checking subtitles, even though Bv2.1 says they should be set to 0. Rename Time::as_editable_units to Time::as_editable_units_ceil and add a _floor variant, then use that to round down when checking reel boundary overlaps.

Tidying.

2021-01-24T03:15:26Z

Use enum class for the things in types.h

2021-01-21T00:57:06Z

s/DCPReadError/ReadError/g

2020-04-14T18:16:44Z

rebase() would round up and so it was possible for ticks to go out of range.

2018-05-02T21:16:03Z

Now it still rounds up but then copes with overflow.

db8af2f changed rebase() to round down when rebasing times, but

2018-02-07T21:38:01Z

did not say why. This rounding down produces some unexpected results, e.g. taking 41 at a TCR of 1000 to a TCR of 24 gives 0, which upsets those who use DCP-o-matic and put in a SRT subtitle ending at ,041 --- the sub time is rounded down to 0 for a SMPTE DCP. This commit restores round-to-nearest behaviour.

Fix ridiculous thinko in Time::operator{<,>}

2016-08-22T15:06:29Z

Before this x < x and x > x were true.

Remove stringstream from Time.

2016-08-11T14:26:30Z

Use locked_sstream. Replace once parse_stream with parse_memory.

2016-07-22T08:20:58Z

Tighten up time parsing, and also allow the previously

2016-06-13T23:20:06Z

unsupported Interop HH:MM:SS.sss format for times.