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MIDI PC/CC script: allow roll_transport() to start playback at a marker

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Brent Baccala 2025-11-12 19:07:32 -05:00
parent 01d221170f
commit 3a61a355ee
1 changed files with 25 additions and 5 deletions
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30
share/scripts/midi_pc_and_cc.lua
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@ -35,6 +35,9 @@ MIDI CC 93: end
There's a convenience function to roll transport at a start time in seconds:
MIDI CC 93: roll_transport(value, 0)
You can also roll transport at a marker:
MIDI CC 93: roll_transport(value, "01")
Another convenience function to activate or deactivate a plugin:
MIDI CC 91: activate_processor_by_name(route, value, "Gigaverb")
@ -97,17 +100,34 @@ end
--
-- a convenience function to start or stop the transport
-- value is 0 to stop transport and not 0 to start transport
-- location is a value in seconds
-- location is either a value in seconds or a string matching a marker
function string.starts(String,Start)
return string.sub(String,1,string.len(Start))==Start
end
function roll_transport(value, location)
if value==0 then
Session:request_stop (false, false, ARDOUR.TransportRequestSource.TRS_UI)
else
-- default value of location is 0 (start of session)
if not location then location = 0 end
start_sample = Session:nominal_sample_rate() * location;
Session:request_locate(location, false, ARDOUR.LocateTransportDisposition.MustStop, ARDOUR.TransportRequestSource.TRS_UI)
Session:request_roll (ARDOUR.TransportRequestSource.TRS_UI)
if not location then
start_sample = 0
elseif type(location) == "string" then
for loc in Session:locations():list():iter() do
if loc:is_mark() then
if string.starts(loc:name(), location) then
start_sample = loc:start():samples();
end
end
end
else
start_sample = Session:nominal_sample_rate() * location;
end
if start_sample then
Session:request_locate(start_sample, false, ARDOUR.LocateTransportDisposition.MustStop, ARDOUR.TransportRequestSource.TRS_UI)
Session:request_roll (ARDOUR.TransportRequestSource.TRS_UI)
end
end
end