dsl example added

examples/dsl/vm_dsl.py

@@ -0,0 +1,93 @@
+import time
+
+import voicemeeterlib
+from pyparsing import (
+    Combine,
+    Group,
+    OneOrMore,
+    Optional,
+    Suppress,
+    Word,
+    alphanums,
+    alphas,
+    nums,
+)
+
+
+class Parser:
+    def __init__(self, vm):
+        self.vm = vm
+        self.kls = Word(alphas)
+        self.token = Suppress("->")
+        self.index = Word(nums)
+        self.action = Word(alphanums)
+
+    def parse(self, cmds):
+        event = (
+            self.kls
+            + self.token
+            + self.index
+            + self.token
+            + self.action
+            + Optional(
+                Combine(
+                    Optional("-") + Word(nums) + Optional(".") + Optional(Word(nums))
+                )
+            )
+            + Optional(self.action)
+            + Optional(self.token)
+            + Optional(Group(OneOrMore(Word(alphanums))))
+        )
+
+        for cmd in cmds:
+            kls, index, param, val = event.parseString(cmd)
+            kls = "".join(kls)
+            index = int(*index)
+            target = getattr(self.vm, kls)[index]
+            if val in ["on", "off"]:
+                setattr(target, param, 1 if val == "on" else 0)
+            if param in ["gain", "comp", "gate", "limit", "audibility"]:
+                setattr(target, param, float(val))
+            if param in ["label"]:
+                val = " ".join(val)
+                setattr(target, param, val)
+
+            time.sleep(0.05)
+
+
+def main(cmds=None):
+    with voicemeeterlib.api("banana") as vm:
+        parser = Parser(vm)
+        if cmds:
+            parser.parse(cmds)
+        else:
+            try:
+                while True:
+                    cmd = input("please enter command (Return to exit)\n")
+                    if not cmd:
+                        break
+                    parser.parse((cmd,))
+            except KeyboardInterrupt as e:
+                SystemExit(e)
+
+
+if __name__ == "__main__":
+    cmds = (
+        "strip -> 0 -> mute on",
+        "bus -> 0 -> mute on",
+        "strip -> 0 -> mute off",
+        "bus -> 0 -> mute on",
+        "strip -> 3 -> solo on",
+        "strip -> 3 -> solo off",
+        "strip -> 1 -> A1 on",
+        "strip -> 1 -> A1 off",
+        "bus -> 3 -> eq on",
+        "bus -> 3 -> eq off",
+        "strip -> 4 -> gain 1.2",
+        "strip -> 0 -> gain -8.2",
+        "strip -> 1 -> label -> rode podmic",
+        "strip -> 2 -> limit -28",
+    )
+
+    # pass cmds to parse cmds, otherwise simply run main() to test stdin parsing
+    main(cmds)