ativar/desativar tracks de áudio, knobs funcionais

assets/js/creations/pattern/pattern_state.js

@@ -16,6 +16,82 @@ const DEFAULT_KICKER_XML = `<kicker>
   <env amt="0" attack="0.01" hold="0.1" decay="0.1" release="0.1" sustain="0.5" sync_mode="0"/>
 </kicker>`;
 
+// ------------------------------------------------------------
+// MIX / MUTE HELPERS (Volume, Pan)
+// ------------------------------------------------------------
+const MAX_TRACK_VOLUME = 1.5;
+
+function _clamp(n, min, max) {
+  const x = Number(n);
+  if (!Number.isFinite(x)) return min;
+  return Math.min(max, Math.max(min, x));
+}
+
+function _ensureMuteFields(track) {
+  if (!track) return;
+  if (track.isMuted == null) track.isMuted = !!track.muted;
+  if (track.muted == null) track.muted = !!track.isMuted;
+}
+
+function applyTrackMix(track) {
+  if (!track) return;
+
+  _ensureMuteFields(track);
+
+  const vol = _clamp(track.volume ?? DEFAULT_VOLUME, 0, MAX_TRACK_VOLUME);
+  const pan = _clamp(track.pan ?? DEFAULT_PAN, -1, 1);
+  const isMuted = !!(track.isMuted || track.muted);
+
+  // Volume (dB): mute => -Infinity
+  if (!track.volumeNode) {
+    track.volumeNode = new Tone.Volume(
+      isMuted || vol === 0 ? -Infinity : Tone.gainToDb(vol)
+    );
+  } else {
+    track.volumeNode.volume.value =
+      isMuted || vol === 0 ? -Infinity : Tone.gainToDb(vol);
+  }
+
+  // Pan
+  if (!track.pannerNode) {
+    track.pannerNode = new Tone.Panner(pan);
+  } else {
+    track.pannerNode.pan.value = pan;
+  }
+
+  // reconecta cadeia base (idempotente)
+  try { track.volumeNode.disconnect(); } catch {}
+  try { track.pannerNode.disconnect(); } catch {}
+  track.volumeNode.connect(track.pannerNode);
+  track.pannerNode.connect(getMainGainNode());
+}
+
+// API pública (usada pelo UI/socket)
+export function setPatternTrackMute(trackId, isMuted) {
+  const t = (appState.pattern.tracks || []).find((x) => String(x.id) === String(trackId));
+  if (!t) return false;
+  t.isMuted = !!isMuted;
+  t.muted = !!isMuted;
+  applyTrackMix(t);
+  return true;
+}
+
+export function setPatternTrackVolume(trackId, volume) {
+  const t = (appState.pattern.tracks || []).find((x) => String(x.id) === String(trackId));
+  if (!t) return false;
+  t.volume = _clamp(volume, 0, MAX_TRACK_VOLUME);
+  applyTrackMix(t);
+  return true;
+}
+
+export function setPatternTrackPan(trackId, pan) {
+  const t = (appState.pattern.tracks || []).find((x) => String(x.id) === String(trackId));
+  if (!t) return false;
+  t.pan = _clamp(pan, -1, 1);
+  applyTrackMix(t);
+  return true;
+}
+
 export function initializePatternState() {
   appState.pattern.tracks.forEach(track => {
     try { track.player?.dispose(); } catch {}
@@ -30,33 +106,14 @@ export function initializePatternState() {
 }
 
 export async function loadAudioForTrack(track) {
-  // 1) Garante Volume/Pan
+  // 1) Garante Volume/Pan/Mute e reconecta a cadeia base
   try {
-    if (!track.volumeNode) {
-      track.volumeNode = new Tone.Volume(
-        track.volume === 0 ? -Infinity : Tone.gainToDb(track.volume)
-      );
-    } else {
-      track.volumeNode.volume.value =
-        track.volume === 0 ? -Infinity : Tone.gainToDb(track.volume);
-    }
+    applyTrackMix(track);
 
-    if (!track.pannerNode) {
-      track.pannerNode = new Tone.Panner(track.pan ?? 0);
-    } else {
-      track.pannerNode.pan.value = track.pan ?? 0;
-    }
-
-    // Desconecta o que existir
+    // desconecta o que existir (para reconectar sem duplicar rotas)
     try { track.instrument?.disconnect(); } catch {}
     try { track.player?.disconnect(); } catch {}
     try { track.previewPlayer?.disconnect(); } catch {}
-
-    // Reconecta cadeia base
-    try { track.volumeNode.disconnect(); } catch {}
-    try { track.pannerNode.disconnect(); } catch {}
-    track.volumeNode.connect(track.pannerNode);
-    track.pannerNode.connect(getMainGainNode());
   } catch (e) {
     console.error("Erro ao criar nós de áudio base:", e);
   }
@@ -257,6 +314,8 @@ export function addTrackToState() {
     patterns,
     activePatternIndex: appState.pattern.activePatternIndex ?? 0,
 
+    isMuted: false,
+    muted: false,
     volume: DEFAULT_VOLUME,
     pan: DEFAULT_PAN,
     volumeNode: new Tone.Volume(Tone.gainToDb(DEFAULT_VOLUME)),