LivePremier Plus v0.4.0-preview.1 (preview)

A preview build. Marked as a pre-release, so it stays out of "Latest
release" and the README download table keeps pointing at v0.3.1. Try it on a
rehearsal, not on a show.

Everything here is verified against the Analog Way simulators — LivePremier
6.2.73, Midra 4K 3.2.29 and Alta 4K 1.3.7 — through the proxy. No part of it
has been run against physical hardware.

Midra 4K and Alta 4K are detected, and told apart

They run AWJ and Web RCS like LivePremier, but they are a different
platform: mng-platform against LivePremier's nlc-platform.
screenAuxGroupList, presetBank and vpuMixerList do not exist there, and
screens are numbered 1–4 rather than S1–S24.

So this release detects the switcher and offers only what it can actually
do. Capabilities are probed rather than looked up in a table: a feature is
offered when the part of the device store it drives is present, which means an
Analog Way range this build has never met still gets the right answer for the
right reason. On a Midra or an Alta you get the settings page — which explains,
capability by capability, why everything else is absent — and nothing that
would send a switcher a write it has no property for.

Audio patching on the command line

Set Audio Patch Input 1 Channel 1 To Dante 1
Set Audio Patch Input 1 Channel 1 Thru 8 To Dante 1
Set Audio Mute Dante 1 Thru 6
Set Audio Patch None To Output 3

Dante is addressed as a flat 1–64 because that is how people say it. A run of
sources lays onto consecutive destinations, the idiom every audio desk has, but
only within what the destination already names — it will not roll on into the
next output. Patching an output as if it were a source, or a run that would
fall off the end, is refused by name.

The grammar is mynah's, so the
console here and the Companion module share one implementation.

Also fixed: a failed command has never shown its reason. Every refusal in
the language read as the bare words "cannot compile".

Timecode, and cues that fire off it

MTC over Web MIDI, LTC off an audio input, or anything at all POSTing to
/__lpp/timecode. A cue can carry an hh:mm:ss:ff and fires when the clock
reaches it.

The awkward parts are handled deliberately:

• Going backwards re-arms, because a rehearsal runs the same three minutes
  twenty times.
• Locating forward fires nothing it jumped over. Going from 00:01:00 to
  01:30:00 must not run a hundred takes in a second.
• A stopped feed is reported as stopped — a paused deck, a pulled cable and
  a switched-off generator are identical on the wire, and none of them is a
  reason to keep acting.
• Drop-frame is handled as the labelling scheme it is; ignoring it drifts 3.6
  seconds an hour.

Two pop-out windows

The console, with the screen and aux previews beside it, a full-width
command line, and a searchable dictionary of the whole grammar.

A QLab-style cue editor — a numbered list driven from the keyboard with an
inspector underneath. The Timeline tab in Web RCS is 360 pixels wide; this is
where a show actually gets written.

Both drive the Web RCS tab's own session rather than opening one of their own,
so the switcher's client count still reads true, and both say so plainly if the
window they came from closes.

Also

• A LivePremier Plus settings page, in the Preconfig flyout beside the
  device's own System page.
• The Screens / Aux. tab strip fits its panel now. Console and Timeline were
  running out past the edge and underneath the Transition column; they shorten
  to fit and keep the full name on hover.

Not in this build

Macros are a placeholder that lists the questions they are waiting on. Cue
actions are listed and removable in the pop-out editor but are still built from
the Timeline tab, which can see the device's screens and memories.