feature: alarm

components/user_app/alert.cpp

@@ -1,4 +1,5 @@
 #include "alert.h"
+#include "audio_client.h"
 #include "codec_bsp.h"
 #include "i2c_bsp.h"
 #include <esp_log.h>
@@ -84,6 +85,7 @@ void alert_trigger(alert_type_t type)
     if (type >= ALERT_TYPE_COUNT) return;
     if (s_muted) return;
     if (!s_tone_buf || !s_codec) return;
+    if (audio_client_get_state() == AUDIO_PLAYING) return;  /* don't fight over codec */
 
     if (xSemaphoreTake(s_alert_mutex, pdMS_TO_TICKS(50)) != pdTRUE) return;