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livetrax/share/scripts/trigger_mixer_scene.lua

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ardour {
["type"] = "session",
name = "Mixer Scene Sequencer",
license = "MIT",
author = "John Devlin, Robin Gareus",
description = [[Recall a Mixer Scene when the playhead passes over a Marker named 'MS <nuber>' where <number> indicates the scene to recall.]]
}
function factory ()
local MIXER_SCENE_MARKER_PREFIX = "MS "
return function (n_samples)
if (not Session:transport_rolling()) then
-- not rolling, nothing to do.
return
end
local pos = Session:transport_sample() -- current playhead position
local loc = Session:locations() -- all marker locations
local tpos = Temporal.timepos_t(pos)
local mpos = loc:first_mark_after(tpos, false)
if (mpos == Temporal.timepos_t.max(tpos:time_domain())) then
-- no marker was found
return
end
local mloc = loc:mark_at(mpos, Temporal.timecnt_t(0), 0)
if not mloc then
-- no marker found at that location
return
end
if (pos + n_samples > mpos:samples()) then
-- the marker is within this sample block
if mloc:name():sub(1, MIXER_SCENE_MARKER_PREFIX:len()) == MIXER_SCENE_MARKER_PREFIX then
-- the marker name begins with MIXER_SCENE_MARKER_PREFIX: get the remainder of the name (should be a number)
local msNum = tonumber(mloc:name():sub(MIXER_SCENE_MARKER_PREFIX:len() + 1))
if msNum and msNum >= 1 and msNum <= 8 then
Session:apply_nth_mixer_scene(msNum - 1)
end
end
end
end
end