c2js - midi output and device select (#204)

* update c2js template for midi device selection * wasm midi_out implemented, no test * scriptprocessornode * clean up shared code * midi_utils * consistency * revert attempt to remove dublicate code, channel bugfix, cleanup * consistency * consistency * changelog and channel --------- Co-authored-by: Reinissance <reinissancey@gmail.com>
Wasted-Audio · Oct 14, 2024 · 8759c49 · 8759c49
1 parent 250a1a1
commit 8759c49
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -14,6 +14,8 @@ Bugfixes:
 
 * Daisy template newline
 
+* JS: midi out and device select
+
 0.12.1
 -----
 

diff --git a/hvcc/generators/c2js/template/hv_worklet.js b/hvcc/generators/c2js/template/hv_worklet.js
@@ -108,13 +108,22 @@ class {{name}}_AudioLibWorklet extends AudioWorkletProcessor {
       var self = this;
       // typedef void (HvSendHook_t) (HeavyContextInterface *context, const char *sendName, hv_uint32_t sendHash, const HvMessage *msg);
       var sendHook = addFunction(function(context, sendName, sendHash, msg) {
+        // Filter out MIDI messages
+        const midiMessage = sendMidiOut(UTF8ToString(sendName), msg);
+        if (midiMessage.length > 0) {
+          self.port.postMessage({
+            type: 'midiOut',
+            payload: midiMessage
+          });
+        } else {
           // Converts sendhook callback to (sendName, float) message
           self.port.postMessage({
             type: 'sendHook',
             payload: [UTF8ToString(sendName), _hv_msg_getFloat(msg, 0)]
           });
-        },
-        "viiii"
+        }
+      },
+      "viiii"
       );
       _hv_setSendHook(this.heavyContext, sendHook);
     }
@@ -132,73 +141,7 @@ class {{name}}_AudioLibWorklet extends AudioWorkletProcessor {
     }
 
     sendMidi(message) {
-      if (this.heavyContext) {
-        var command = message[0] & 0xF0;
-        var channel = message[0] & 0x0F;
-        var data1 = message[1];
-        var data2 = message[2];
-
-        // all events to [midiin]
-        for (var i = 1; i <= 2; i++) {
-          _hv_sendMessageToReceiverFF(this.heavyContext, HV_HASH_MIDIIN, 0,
-             message[i],
-             channel
-          );
-        }
-
-        // realtime events to [midirealtimein]
-        if (MIDI_REALTIME.includes(message[0])) {
-          _hv_sendMessageToReceiverFF(this.heavyContext, HV_HASH_MIDIREALTIMEIN, 0,
-            message[0]
-          );
-        }
-
-        switch(command) {
-          case 0x80: // note off
-            _hv_sendMessageToReceiverFFF(this.heavyContext, HV_HASH_NOTEIN, 0,
-              data1,
-              0,
-              channel);
-            break;
-          case 0x90: // note on
-            _hv_sendMessageToReceiverFFF(this.heavyContext, HV_HASH_NOTEIN, 0,
-              data1,
-              data2,
-              channel);
-            break;
-          case 0xA0: // polyphonic aftertouch
-            _hv_sendMessageToReceiverFFF(this.heavyContext, HV_HASH_POLYTOUCHIN, 0,
-              data2, // pressure
-              data1, // note
-              channel);
-            break;
-          case 0xB0: // control change
-            _hv_sendMessageToReceiverFFF(this.heavyContext, HV_HASH_CTLIN, 0,
-              data2, // value
-              data1, // cc number
-              channel);
-            break;
-          case 0xC0: // program change
-            _hv_sendMessageToReceiverFF(this.heavyContext, HV_HASH_PGMIN, 0,
-              data1,
-              channel);
-            break;
-          case 0xD0: // aftertouch
-            _hv_sendMessageToReceiverFF(this.heavyContext, HV_HASH_TOUCHIN, 0,
-              data1,
-              channel);
-            break;
-          case 0xE0: // pitch bend
-            // combine 7bit lsb and msb into 32bit int
-            var value = (data2 << 7) | data1;
-            _hv_sendMessageToReceiverFF(this.heavyContext, HV_HASH_BENDIN, 0,
-              value,
-              channel);
-            break;
-          default:
-            // console.error('No handler for midi message: ', message);
-        }
-      }
+      sendMidiIn(this.heavyContext, message);
     }
 
     sendStringToReceiver(name, message) {
@@ -265,9 +208,145 @@ var tableHashes = {
 registerProcessor("{{name}}_AudioLibWorklet", {{name}}_AudioLibWorklet);
 
 
+// midi_utils
+
+function sendMidiIn(hv_context, message) {
+  if (hv_context) {
+      var command = message[0] & 0xF0;
+      var channel = message[0] & 0x0F;
+      var data1 = message[1];
+      var data2 = message[2];
+
+      // all events to [midiin]
+      for (var i = 1; i <= 2; i++) {
+        _hv_sendMessageToReceiverFF(hv_context, HV_HASH_MIDIIN, 0,
+            message[i],
+            channel
+        );
+      }
+
+      // realtime events to [midirealtimein]
+      if (MIDI_REALTIME.includes(message[0])) {
+        _hv_sendMessageToReceiverFF(hv_context, HV_HASH_MIDIREALTIMEIN, 0,
+          message[0]
+        );
+      }
+
+      switch(command) {
+        case 0x80: // note off
+          _hv_sendMessageToReceiverFFF(hv_context, HV_HASH_NOTEIN, 0,
+            data1,
+            0,
+            channel);
+          break;
+        case 0x90: // note on
+          _hv_sendMessageToReceiverFFF(hv_context, HV_HASH_NOTEIN, 0,
+            data1,
+            data2,
+            channel);
+          break;
+        case 0xA0: // polyphonic aftertouch
+          _hv_sendMessageToReceiverFFF(hv_context, HV_HASH_POLYTOUCHIN, 0,
+            data2, // pressure
+            data1, // note
+            channel);
+          break;
+        case 0xB0: // control change
+          _hv_sendMessageToReceiverFFF(hv_context, HV_HASH_CTLIN, 0,
+            data2, // value
+            data1, // cc number
+            channel);
+          break;
+        case 0xC0: // program change
+          _hv_sendMessageToReceiverFF(hv_context, HV_HASH_PGMIN, 0,
+            data1,
+            channel);
+          break;
+        case 0xD0: // aftertouch
+          _hv_sendMessageToReceiverFF(hv_context, HV_HASH_TOUCHIN, 0,
+            data1,
+            channel);
+          break;
+        case 0xE0: // pitch bend
+          // combine 7bit lsb and msb into 32bit int
+          var value = (data2 << 7) | data1;
+          _hv_sendMessageToReceiverFF(hv_context, HV_HASH_BENDIN, 0,
+            value,
+            channel);
+          break;
+        default:
+          // console.error('No handler for midi message: ', message);
+      }
+    }
+  }
+
+function sendMidiOut(sendName, msg) {
+  switch (sendName) {
+          case "__hv_noteout":
+            var note = _hv_msg_getFloat(msg, 0);
+            var velocity = _hv_msg_getFloat(msg, 1);
+            var channel = _hv_msg_getFloat(msg, 2) % 16; // no pd midi ports
+            return [
+              ((velocity > 0) ? 144 : 128) | channel,
+              note,
+              velocity
+            ]
+          case "__hv_ctlout":
+            var value = _hv_msg_getFloat(msg, 0);
+            var cc = _hv_msg_getFloat(msg, 1);
+            var channel = _hv_msg_getFloat(msg, 2) % 16; // no pd midi ports
+            return [
+              176 | channel,
+              cc,
+              value
+            ]
+          case "__hv_pgmout":
+            var program = _hv_msg_getFloat(msg, 0);
+            var channel = _hv_msg_getFloat(msg, 1) % 16; // no pd midi ports
+            return [
+              192 | channel,
+              program
+            ]
+          case "__hv_touchout":
+            var pressure = _hv_msg_getFloat(msg, 0);
+            var channel = _hv_msg_getFloat(msg, 1) % 16; // no pd midi ports
+            return [
+              208 | channel,
+              pressure,
+            ]
+          case "__hv_polytouchout":
+            var value = _hv_msg_getFloat(msg, 0);
+            var note = _hv_msg_getFloat(msg, 1);
+            var channel = _hv_msg_getFloat(msg, 2) % 16; // no pd midi ports
+            return[
+              160 | channel,
+              note,
+              value
+            ]
+          case "__hv_bendout":
+            var value = _hv_msg_getFloat(msg, 0);
+            let lsb = value & 0x7F;
+            let msb = (value >> 7) & 0x7F;
+            var channel = _hv_msg_getFloat(msg, 1) % 16; // no pd midi ports
+            return [
+              224 | channel,
+              lsb,
+              msb
+            ]
+          case "__hv_midiout":
+            let firstByte = _hv_msg_getFloat(msg, 0);
+            return (firstByte === 192 || firstByte === 208) ? 
+              [_hv_msg_getFloat(msg, 0), _hv_msg_getFloat(msg, 1)] :
+              [_hv_msg_getFloat(msg, 0), _hv_msg_getFloat(msg, 1), _hv_msg_getFloat(msg, 2)];
+          default:
+              console.warn(`Unhandled sendName: ${sendName}`);
+              return [];
+  }
+}
+
 /*
- * MIDI Constants
- */
+* MIDI Constants
+*/
 
 const HV_HASH_NOTEIN          = 0x67E37CA3;
 const HV_HASH_CTLIN           = 0x41BE0f9C;

diff --git a/hvcc/generators/c2js/template/hv_worklet_start.js b/hvcc/generators/c2js/template/hv_worklet_start.js
@@ -8,4 +8,4 @@ var self = {
 
 function importScripts(){
   console.warn('importScripts should not be called in an AudioWorklet', arguments);
-}
+}