Fix peripheral volume_muted state (#403)

Enable updating the `volume_muted` status when muting/unmuting the media player volume, and improve its tracking.

examples/ReSpeaker Mic Array v2.0 (USB)/respeaker_usb_mic_array.py

@@ -86,6 +86,13 @@ USB_PRODUCT_ID    = 0x0018
 LED_COUNT         = 12
 LED_BRIGHTNESS    = 10    # 0–31 (APA102 5-bit global brightness register)
 
+# LED that lights up solid red while the media player (speaker) output is
+# muted at volume 0 — the `volume_muted` peripheral event. LED 9 is the
+# board's bottom-middle position (DOA 270°), sitting right between the
+# micro-USB connector and the 3.5 mm AUX jack on the board edge — the same
+# "bottom" position already used by the mic indicator mapping below.
+VOLUME_MUTED_LED_INDEX = 9
+
 RECONNECT_DELAY_S = 3.0
 
 
@@ -113,6 +120,7 @@ class AssistState(str, Enum):
     TIMER_TICKING = "timer_ticking"
     TIMER_RINGING = "timer_ringing"
     MEDIA_PLAYING = "media_player_playing"
+    VOLUME_MUTED = "volume_muted"
 
 
 # ---------------------------------------------------------------------------
@@ -124,8 +132,9 @@ class SharedState:
         self._lock = threading.Lock()
         self.assist_state: AssistState = AssistState.NOT_READY
         self.ha_connected: bool = False
-        self.muted: bool = False
+        self.muted: bool = False         # mic mute
         self.volume: float = 1.0
+        self.volume_muted: bool = False  # media player volume zero
         self.timer_total_seconds: int = 0
         self.timer_seconds_left: int = 0
         # Light entity state, driven by HA via light_command events.
@@ -151,6 +160,7 @@ class SharedState:
                 "ha_connected":        self.ha_connected,
                 "muted":               self.muted,
                 "volume":              self.volume,
+                "volume_muted":        self.volume_muted,
                 "timer_total_seconds": self.timer_total_seconds,
                 "timer_seconds_left":  self.timer_seconds_left,
                 "light_is_on":         self.light_is_on,
@@ -407,6 +417,22 @@ class LEDRing:
         self._leds.set(6, _scale(RED, factor))
         self._leds.set(9, _scale(RED, factor))
 
+    def _apply_volume_muted_indicator(self) -> None:
+        """
+        Overlay a solid red dot on the bottom-middle LED (index
+        ``VOLUME_MUTED_LED_INDEX``, DOA 270°) when the media player output
+        is muted at volume 0.
+
+        Sits right between the board's micro-USB connector and 3.5 mm AUX
+        jack. Applied after the current pipeline animation has already
+        rendered its frame, so the indicator shows up consistently no
+        matter which animation is active — mirrors how
+        ``_apply_mic_indicators`` marks the microphone cardinal points, but
+        for the distinct speaker-mute state.
+        """
+        self._leds.set(VOLUME_MUTED_LED_INDEX, RED)
+        self._leds.show()
+
     # ------------------------------------------------------------------
     # Animations — each returns sleep time in seconds
     # ------------------------------------------------------------------
@@ -555,6 +581,7 @@ class LEDRing:
             snap    = self._state.snapshot
             color   = self._color()
             muted   = snap["muted"]
+            volume_muted = snap["volume_muted"]
             t_total = snap["timer_total_seconds"]
             t_left  = snap["timer_seconds_left"]
 
@@ -585,6 +612,9 @@ class LEDRing:
             else:
                 sleep = self._anim_off()
 
+            if volume_muted:
+                self._apply_volume_muted_indicator()
+
             time.sleep(sleep)
 
 
@@ -783,7 +813,12 @@ class LVAClient:
             self._state.update(volume=data.get("volume", 1.0))
 
         elif event == "volume_muted":
-            self._state.update(muted=data.get("muted", False))
+            Volume_muted = data.get("muted", True)
+            self._state.update(volume_muted=Volume_muted)
+            if Volume_muted:
+                self._state.update(assist_state=AssistState.VOLUME_MUTED)
+            elif self._state.assist_state == AssistState.VOLUME_MUTED:
+                self._state.update(assist_state=AssistState.VOLUME_MUTED)
 
         elif event == "zeroconf":
             status = data.get("status", "")