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midi-monitor.lua
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midi-monitor.lua
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--
-- MIDI MONITOR
-- 0.6.2 - @okyeron
--
--
-- E1 - select MIDI device
-- E3 - scrollback through MIDI messages
--
-- K2 - toggle unmute/mute internal synth
-- K3 - clear screen / buffer
--
engine.name = 'PolyPerc'
local devicepos = 1
local mdevs = {}
local midi_device
local msg = {}
--local t = 0 -- last tap time
--local dt = 1 -- last tapped delta
local default_bpm = 90
local tempo
local running = false
local clocking = false
local blinkers = {false}
local mute = true
local midi_buffer = {}
local midi_buffer_len = 256
local buff_start = 1
-- display grid setup
local line_height = 8
local line_offset = 16
local col1 = 0
local col2 = 11
local col3 = 29
local col4 = col3 + 18
local col5 = col4 + 44
local col6 = 128
--
function blink_generator(x)
while true do
--print (clock.get_beats() )
clock.sync(1/2)
--print (clock.get_beats() )
blinkers[x] = not blinkers[x]
redraw()
end
end
--
-- INIT
--
function init()
norns.enc.sens(1,6)
clear_midi_buffer()
engine.amp(0)
--_norns.rev_off()
connect()
get_midi_names()
print_midi_names()
-- setup params
params:add{type = "option", id = "midi_device", name = "MIDI-device", options = mdevs , default = 1,
action = function(value)
midi_device.event = nil
--grid.cleanup()
midi_device = midi.connect(value)
midi_device.event = midi_event
midi.update_devices()
mdevs = {}
get_midi_names()
params.params[1].options = mdevs
--tab.print(params.params[1].options)
devicepos = value
if clocking then
clock.cancel(blink_id)
clocking = false
end
print ("midi ".. devicepos .." selected: " .. mdevs[devicepos])
end}
--clock.set_source(1)
params:set("clock_source", 2)
params:set("clock_tempo", default_bpm)
--tempo = util.round (clock.get_tempo(), 1)
tempo = util.round (params:get("clock_tempo"),1)
--print(tempo)
--print(tempo2)
-- Render Style
screen.level(15)
screen.aa(0)
screen.line_width(1)
end
-- END INIT
function get_midi_names()
-- Get a list of grid devices
for id,device in pairs(midi.vports) do
mdevs[id] = device.name
end
end
function print_midi_names()
-- Get a list of grid devices
print ("MIDI Devices:")
for id,device in pairs(midi.vports) do
mdevs[id] = device.name
print(id, mdevs[id])
end
end
function connect()
midi.update_devices()
midi_device = midi.connect(devicepos)
midi_device.event = midi_event
--midi_device.add = on_midi_add
--midi_device.remove = on_midi_remove
end
function clear_midi_buffer()
midi_buffer = {}
for z=1,midi_buffer_len do
table.insert(midi_buffer, {})
end
buff_start = 1
end
local msgNames = {
["pitchbend"] = "pitchbend",
["song_position"] = "songPos" ,
["song_select"] = "songSelct" ,
["program_change"] = "progchang" ,
["channel_pressure"] = "cPressure" ,
["key_pressure"] = "kPressure" }
function rewrite_msgtype(msg)
return msgNames[msg] or msg
end
function midi_event(data)
msg = midi.to_msg(data)
if msg.type == "start" then
clock.transport.reset()
clock.transport.start()
elseif msg.type == "continue" then
if running then
clock.transport.stop()
else
clock.transport.start()
end
end
if msg.type == "stop" then
clock.transport.stop()
end
if msg.type == "clock" then
tempo = util.round (clock.get_tempo(), 1)
--print(tempo)
if not clocking then
clocking = true
blink_id = clock.run(blink_generator, 1)
else
end
elseif data[1] == 0xfe then
-- active sensing
-- do nothing
--print("active sensing")
else
-- {msg.ch, msg.note , msg.vel, msg.type, msg.val}
temp_msg = {}
if msg.ch then temp_msg[1] = msg.ch else temp_msg[1] = "" end
if msg.note then temp_msg[2] = msg.note else temp_msg[2] = "" end
if msg.vel then temp_msg[3] = msg.vel else temp_msg[3] = "" end
if msg.type and msg.type ~= "clock" then
if msg.cc then
temp_msg[4] = msg.type ..": ".. msg.cc
else
--temp_msg[4] = msg.type
temp_msg[4] = rewrite_msgtype(msg.type)
end
else
temp_msg[4] = ""
end
if msg.val then
if msg.type == "pitchbend" then
temp_msg[5] = msg.val - 8192
else
temp_msg[5] = msg.val
end
else
temp_msg[5] = ""
end
table.insert (midi_buffer, 1, temp_msg)
if not mute then
play(msg) -- play notes with default engine
end
redraw()
end
end
--
-- CLOCK coroutines
--
function pulse()
while true do
--clock.sync(1/8)
--step_event()
end
end
function clock.transport.start()
print("transport.start")
running = true
--id = clock.run(pulse)
--running = true
end
function clock.transport.stop()
print("transport.stop")
running = false
end
function clock.transport.reset()
--print("transport.reset")
end
--
-- play notes
--
function play(msg)
if msg.type == 'note_on' then
hz = note_to_hz(msg.note)
--print(hz)
engine.amp(msg.vel / 127)
engine.hz(hz)
end
if msg.type == 'note_off' then
engine.amp(0)
end
end
--
-- Interaction
--
function key(n, z)
if n==2 and z == 1 then
mute = not mute
end
if n == 3 and z == 1 then
clear_midi_buffer()
end
redraw()
end
function enc(id,delta)
if id == 1 then
--print(params:get("midi_device"))
params:set("midi_device", util.clamp(devicepos+delta, 1,4))
if clocking then
clock.cancel(blink_id)
clocking = false
end
end
if id == 2 then
end
if id == 3 then
buff_start = util.clamp(buff_start + delta, 1, midi_buffer_len-5)
end
redraw()
end
--
-- Screen Render
--
function draw_labels()
screen.level(1)
screen.move(col1,(line_height * 2))
screen.text('ch')
screen.move(col2,(line_height * 2))
screen.text('num')
screen.move(col3,(line_height * 2))
screen.text('vel')
screen.move(col4,(line_height * 2))
screen.text('type')
screen.move(col5,(line_height * 2))
screen.text('value')
screen.move(col6,(line_height * 2))
screen.text_right('ln')
end
function draw_event()
for i=1,6 do
--print("i:",i)
buf_idx = buff_start + i - 1
if midi_buffer[buf_idx][1] ~= nil then
screen.level(12)
screen.move(col1+1,(line_offset + line_height * i))
screen.text(midi_buffer[buf_idx][1])
screen.move(col2+1,(line_offset + line_height * i))
screen.text(midi_buffer[buf_idx][2])
screen.move(col3+2,(line_offset + line_height * i))
screen.text(midi_buffer[buf_idx][3])
screen.move(col4,(line_offset + line_height * i))
screen.text(midi_buffer[buf_idx][4])
screen.move(col5,(line_offset + line_height * i))
screen.text(midi_buffer[buf_idx][5])
screen.stroke()
screen.level(3)
screen.move(col6,(line_offset + line_height * i))
screen.text_right(buf_idx)
screen.stroke()
end
end
end
function redraw()
tempo_disp = util.round (clock.get_tempo(), 1)
screen.clear()
draw_labels()
if msg then
draw_event()
end
screen.level(3)
screen.move(90,7)
screen.text('bpm')
screen.move(110,7)
screen.text(tempo_disp)
screen.stroke()
if blinkers[1] and clocking then
screen.level(12)
screen.rect(124, 3, 4, 4)
screen.fill()
-- screen.pixel(112, 6)
else
screen.level(1)
screen.rect(124, 3, 4, 4)
screen.fill()
end
screen.level(1)
screen.line_width (1.5)
screen.move(0, 18)
screen.line (128, 18)
screen.stroke()
--screen.line_width (1)
--screen.move(116, 10)
--screen.line (116, 64)
--screen.stroke()
screen.level(15)
screen.move(0, 7)
screen.text(devicepos .. ": ".. truncate_txt(mdevs[devicepos], 19))
screen.update()
end
--
-- Utils
--
function truncate_txt(txt, size)
if string.len(txt) > size then
s1 = string.sub(txt, 1, 9) .. "..."
s2 = string.sub(txt, string.len(txt) - 5, string.len(txt))
s = s1..s2
else
s = txt
end
return s
end
function note_to_hz(note)
return (440 / 32) * (2 ^ ((note - 9) / 12))
end