Merge pull request #7 from quaternionmedia/command8

Command8

ludwig/boards/__init__.py

@@ -1,3 +1,4 @@
 from .qu24 import Qu24
 from .gld import Gld
 from .xair import XAir
+from .command8 import Command8

ludwig/boards/command8.py

@@ -0,0 +1,49 @@
+from ludwig import mixer, Mixer, Midi
+from rtmidi.midiconstants import NOTE_ON, CONTROL_CHANGE
+from ludwig.types import uint1, uint2, uint3, uint4, uint5, uint7, uint8
+
+
+class Command8(Midi, Mixer):
+    """Focusrite Command8 mixing station"""
+
+    @mixer
+    def fader(self, channel: uint4, volume: uint7):
+        """Fade the channel"""
+        self.send([CONTROL_CHANGE | channel, 7, volume])
+
+    @mixer
+    def pan(self, channel: uint4, pan: uint7):
+        """Pan the channel"""
+        self.send([CONTROL_CHANGE | channel, 10, pan])
+
+    @mixer
+    def mute(self, channel: uint4):
+        """Mute the channel"""
+        self.send([CONTROL_CHANGE | channel, 14, 127])
+
+    @mixer
+    def unmute(self, channel: uint4):
+        """Unmute the channel"""
+        self.send([CONTROL_CHANGE | channel, 14, 0])
+
+    def __call__(self, event, data=None):
+        message, deltatime = event
+        print('Command8!', message, deltatime)
+        if message[0] & 0xF0 == CONTROL_CHANGE:
+            print(
+                f'found control change message {message[0]} on channel {message[0] & 0x0F}'
+            )
+            if message[1] == 7:
+                print(f'fader channel {message[0] & 0x0F } at {message[2]}')
+                self.hook.fader(channel=message[0] & 0x0F, volume=message[2])
+            elif message[1] == 10:
+                print(f'pan channel {message[0] & 0x0F } at {message[2]}')
+                self.hook.pan(channel=message[0] & 0x0F, pan=message[2])
+            elif message[1] == 14:
+                print(
+                    f'{"un" if message[2] == 0 else ""}mute channel {message[0] & 0x0F }'
+                )
+                if message[2]:
+                    self.hook.mute(channel=message[0] & 0x0F)
+                else:
+                    self.hook.unmute(channel=message[0] & 0x0F)

ludwig/midi.py

@@ -8,6 +8,7 @@ class Midi:
     def __init__(
         self,
         *args,
+        hook,
         port: str,
         client_name: str = 'midi',
         channel: uint4 = 0,
@@ -24,7 +25,7 @@ def __init__(
             send(message): send a MIDI message of bytes (sent as integers)
             nrpm(message): send a MIDI NRPN (Non-Registered Parameter Number)
         """
-
+        self.hook = hook
         self.port = port
         self.client_name = client_name
         self.channel = channel