From ec37470778445367202cb695fe32d411d7ec7dac Mon Sep 17 00:00:00 2001
From: severak <strajt@dalten.cz>
Date: Thu, 8 Aug 2024 19:26:26 +0200
Subject: [PATCH] Doing some experiments with WebMidiLink

---
 gm.html | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/gm.html b/gm.html
index 35a0a7b..1529265 100644
--- a/gm.html
+++ b/gm.html
@@ -354,6 +354,40 @@
         });
 
 
+        // TODO - put this into heartbeat.js, wrap it and link to https://www.g200kg.com/en/docs/webmidilink/spec.html
+        function webMidiLinkRecv(event) {
+            var msg = event.data.split(",");
+            switch (msg[0]) {
+                case "midi":
+                    switch (parseInt(msg[1], 16) & 0xf0) {
+                        case 0x80:
+                            console.log('note off', parseInt(msg[2], 16));
+                            synth.noteOff(parseInt(msg[2], 16));
+                            break;
+                        case 0x90:
+                            var velo = parseInt(msg[3], 16);
+                            if (velo > 0) {
+                                console.log('note on', parseInt(msg[2], 16), velo);
+                                synth.noteOn(parseInt(msg[2], 16), velo);
+                            } else {
+                                console.log('note on', parseInt(msg[2], 16), velo);
+                                synth.noteOff(parseInt(msg[2], 16));
+                            }
+                            break;
+                        case 0xb0:
+                            if (parseInt(msg[2], 16) == 0x78) {
+                                console.log('panik!');
+                                synth.panic();
+                            }
+                            break;
+                    }
+                    break;
+            }
+        }
+
+        window.addEventListener("message", webMidiLinkRecv, false);
+
+
     });
 </script>