feat(ui): add spectrum analyzer visualizer

2026-06-03 16:31:16 +02:00 · 2026-04-06 16:58:53 +02:00
parent 487195b716
commit 82993d7c97
14 changed files with 439 additions and 301 deletions
@@ -0,0 +1,122 @@
+package com.michatec.radio
+
+import android.content.ComponentName
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.util.Log
+import android.view.View
+import androidx.annotation.OptIn
+import androidx.appcompat.app.AppCompatActivity
+import androidx.media3.common.util.UnstableApi
+import androidx.media3.session.MediaController
+import androidx.media3.session.SessionToken
+import androidx.preference.PreferenceFragmentCompat
+import com.google.common.util.concurrent.ListenableFuture
+import com.google.common.util.concurrent.MoreExecutors
+import com.michatec.radio.extensions.requestVisualizerData
+import com.michatec.radio.helpers.ExtrasHelper
+
+/*
+ * VisualizerFragment class: Handles audio visualization
+ */
+@OptIn(UnstableApi::class)
+class VisualizerFragment : PreferenceFragmentCompat() {
+
+    private val TAG = "VisualizerFragment"
+    private lateinit var controllerFuture: ListenableFuture<MediaController>
+    private val controller: MediaController?
+        get() = if (this::controllerFuture.isInitialized && controllerFuture.isDone) {
+            try { controllerFuture.get() } catch (_: Exception) { null }
+        } else null
+
+    private var visualizerPref: ExtrasHelper.VisualizerPreference? = null
+    private val handler = Handler(Looper.getMainLooper())
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        (activity as AppCompatActivity).supportActionBar?.title = getString(R.string.pref_visualizer_title)
+        (activity as AppCompatActivity).supportActionBar?.show()
+    }
+
+    override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
+        val context = preferenceManager.context
+        val screen = preferenceManager.createPreferenceScreen(context)
+        
+        visualizerPref = ExtrasHelper.VisualizerPreference(context)
+        visualizerPref?.key = "visualizer_key"
+        screen.addPreference(visualizerPref!!)
+
+        preferenceScreen = screen
+    }
+
+    override fun onStart() {
+        super.onStart()
+        initializeController()
+    }
+
+    override fun onStop() {
+        super.onStop()
+        releaseController()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        startPolling()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        stopPolling()
+    }
+
+    private fun initializeController() {
+        controllerFuture = MediaController.Builder(
+            requireContext(),
+            SessionToken(requireContext(), ComponentName(requireContext(), PlayerService::class.java))
+        ).buildAsync()
+        controllerFuture.addListener({
+            Log.d(TAG, "MediaController connected: ${controller != null}")
+        }, MoreExecutors.directExecutor())
+    }
+
+    private fun releaseController() {
+        if (this::controllerFuture.isInitialized) {
+            MediaController.releaseFuture(controllerFuture)
+        }
+    }
+
+    private val pollRunnable = object : Runnable {
+        override fun run() {
+            val c = controller
+            if (c != null && c.isPlaying) {
+                val resultFuture = c.requestVisualizerData()
+                resultFuture.addListener({
+                    try {
+                        val result = resultFuture.get()
+                        if (result.resultCode == androidx.media3.session.SessionResult.RESULT_SUCCESS) {
+                            val data = result.extras.getFloatArray(Keys.EXTRA_VISUALIZER_DATA)
+                            if (data != null && data.isNotEmpty()) {
+                                visualizerPref?.update(data)
+                            }
+                        } else {
+                            Log.e(TAG, "Custom command failed with result code: ${result.resultCode}")
+                        }
+                    } catch (e: Exception) {
+                        Log.e(TAG, "Error fetching visualizer data", e)
+                    }
+                }, MoreExecutors.directExecutor())
+            }
+            handler.postDelayed(this, 25) // ~40 FPS
+        }
+    }
+
+    private fun startPolling() {
+        handler.removeCallbacks(pollRunnable)
+        handler.post(pollRunnable)
+    }
+
+    private fun stopPolling() {
+        handler.removeCallbacks(pollRunnable)
+    }
+}