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import ValueStream, EventStream, Op, Input, val, evt from require 'core.base'
import input, output, inout, apply_range from require 'lib.midi.core'
gate = ValueStream.meta
meta:
name: 'gate'
summary: "gate from note-on and note-off messages."
examples: { '(midi/gate [port] note [chan])' }
value: class extends Op
pattern = -evt['midi/port'] + val.num -val.num
setup: (inputs, scope) =>
@out or= ValueStream 'bool'
{ port, note, chan } = pattern\match inputs
super
port: Input.hot port or scope\get '*midi*'
note: Input.hot note
chan: Input.hot chan or ValueStream.num -1
tick: =>
{ :port, :note, :chan } = @inputs
if note\dirty! or chan\dirty!
@out\set false
if port\dirty!
for msg in *port!
if msg.a == note! and (chan! == -1 or msg.chan == chan!)
if msg.status == 'note-on'
@out\set true
elseif msg.status == 'note-off'
@out\set false
trig = ValueStream.meta
meta:
name: 'trig'
summary: "`bang`s from note-on messages."
examples: { '(midi/trig [port] note [chan])' }
value: class extends Op
pattern = -evt['midi/port'] + val.num -val.num
setup: (inputs, scope) =>
@out or= EventStream 'bang'
{ port, note, chan } = pattern\match inputs
super
port: Input.hot port or scope\get '*midi*'
note: Input.cold note
chan: Input.cold chan or ValueStream.num -1
tick: =>
{ :port, :note, :chan } = @inputs
for msg in *port!
if msg.a == note! and (chan! == -1 or msg.chan == chan!)
if msg.status == 'note-on'
@out\add true
cc = ValueStream.meta
meta:
name: 'cc'
summary: "`num` from cc-change messages."
examples: { '(midi/cc [port] cc [chan [range]])' }
description: "
`range` can be one of:
- 'raw' [ 0 - 128[
- 'uni' [ 0 - 1[ (default)
- 'bip' [-1 - 1[
- 'rad' [ 0 - tau[
- 'deg' [ 0 - 360[
- (num) [ 0 - num["
value: class extends Op
pattern = -evt['midi/port'] + val.num + -val.num + -val.num
setup: (inputs, scope) =>
{ port, cc, chan, range } = pattern\match inputs
super
port: Input.hot port or scope\get '*midi*'
cc: Input.cold cc
chan: Input.cold chan or ValueStream.num -1
range: Input.cold range or ValueStream.str 'uni'
@out or= ValueStream 'num', apply_range @inputs.range, 0
tick: =>
{ :port, :cc, :chan, :range } = @inputs
for msg in *port!
if msg.status == 'control-change' and
(chan! == -1 or msg.chan == chan!) and
msg.a == cc!
@out\set apply_range range, msg.b
{
:input
:output
:inout
:gate
:trig
:cc
}
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