Added microphone volume vu meter

app/src/main/java/org/linphone/ui/call/view/VuMeterView.kt

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2010-2025 Belledonne Communications SARL.
+ *
+ * This file is part of linphone-android
+ * (see https://www.linphone.org).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.linphone.ui.call.view
+
+import android.content.Context
+import android.graphics.BitmapShader
+import android.graphics.Canvas
+import android.graphics.Matrix
+import android.graphics.Paint
+import android.graphics.Shader
+import android.util.AttributeSet
+import android.view.View
+import androidx.core.content.ContextCompat
+import androidx.core.graphics.createBitmap
+import org.linphone.R
+
+class VuMeterView : View {
+    companion object {
+        private const val TAG = "[VuMeter View]"
+    }
+
+    private lateinit var paint: Paint
+    private lateinit var matrix: Matrix
+    private lateinit var vuMeterPaint: Paint
+
+    private val color = ContextCompat.getColor(context, R.color.vu_meter)
+
+    private var vuMeterPercentage: Float = 0f
+
+    constructor(context: Context?) : super(context) {
+        init()
+    }
+
+    constructor(context: Context?, attrs: AttributeSet?) : super(context, attrs) {
+        init()
+    }
+
+    constructor(context: Context?, attrs: AttributeSet?, defStyle: Int) : super(
+        context,
+        attrs,
+        defStyle
+    ) {
+        init()
+    }
+
+    private fun init() {
+        paint = Paint()
+        paint.isAntiAlias = true
+        matrix = Matrix()
+
+        vuMeterPaint = Paint()
+        vuMeterPaint.strokeWidth = 2f
+        vuMeterPaint.isAntiAlias = true
+        vuMeterPaint.setColor(color)
+    }
+
+    fun setVuMeterPercentage(percentage: Float) {
+        vuMeterPercentage = percentage
+        invalidate()
+    }
+
+    override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
+        super.onSizeChanged(w, h, oldw, oldh)
+        createShader()
+    }
+
+    private fun createShader(): Shader {
+        val level = (height - height * vuMeterPercentage).toFloat()
+
+        val bitmap = createBitmap(width, height)
+        val canvas = Canvas(bitmap)
+        canvas.drawRect(0f, height.toFloat(), width.toFloat(), level, vuMeterPaint)
+
+        val shader = BitmapShader(bitmap, Shader.TileMode.REPEAT, Shader.TileMode.CLAMP)
+        return shader
+    }
+
+    override fun onDraw(canvas: Canvas) {
+        paint.setShader(createShader())
+        canvas.drawCircle(width / 2f, height / 2f, width / 2f, paint)
+    }
+}

app/src/main/java/org/linphone/ui/call/viewmodel/CurrentCallViewModel.kt

@@ -29,6 +29,9 @@ import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 import org.linphone.LinphoneApplication.Companion.coreContext
@@ -69,6 +72,8 @@ class CurrentCallViewModel
     constructor() : GenericViewModel() {
     companion object {
         private const val TAG = "[Current Call ViewModel]"
+        private const val VU_METER_MIN = -20f
+        private const val VU_METER_MAX = 4
     }
 
     val contact = MutableLiveData<ContactAvatarModel>()
@@ -107,6 +112,8 @@ class CurrentCallViewModel
 
     val isMicrophoneMuted = MutableLiveData<Boolean>()
 
+    val microphoneRecordingVolume = MutableLiveData<Float>()
+
     val isSpeakerEnabled = MutableLiveData<Boolean>()
 
     val isHeadsetEnabled = MutableLiveData<Boolean>()
@@ -541,6 +548,7 @@ class CurrentCallViewModel
         operationInProgress.value = false
         proximitySensorEnabled.value = false
         videoUpdateInProgress.value = false
+        microphoneRecordingVolume.value = 0f
 
         coreContext.postOnCoreThread { core ->
             hideSipAddresses.postValue(corePreferences.hideSipAddresses)
@@ -1247,6 +1255,13 @@ class CurrentCallViewModel
         } else {
             Log.i("$TAG Failed to find an existing 1-1 conversation for current call")
         }
+
+        microphoneVolumeVuMeterTickerFlow().onEach {
+            coreContext.postOnCoreThread {
+                val volumeDbm0 = currentCall.recordVolume
+                microphoneRecordingVolume.postValue(computeVuMeterValue(volumeDbm0))
+            }
+        }.launchIn(viewModelScope)
     }
 
     @WorkerThread
@@ -1519,4 +1534,17 @@ class CurrentCallViewModel
     private fun showRecordingToast() {
         showGreenToast(R.string.call_is_being_recorded, R.drawable.record_fill)
     }
+
+    private fun microphoneVolumeVuMeterTickerFlow() = flow {
+        while (::currentCall.isInitialized) {
+            emit(Unit)
+            delay(50)
+        }
+    }
+
+    private fun computeVuMeterValue(volume: Float): Float {
+        if (volume < VU_METER_MIN) return 0f
+        if (volume > VU_METER_MAX) return 1f
+        return (volume - VU_METER_MIN) / (VU_METER_MAX - VU_METER_MIN)
+    }
 }

app/src/main/java/org/linphone/utils/DataBindingUtils.kt

@@ -69,6 +69,7 @@ import org.linphone.core.ConsolidatedPresence
 import org.linphone.core.tools.Log
 import org.linphone.ui.NotoSansFont
 import org.linphone.ui.call.conference.model.ConferenceParticipantDeviceModel
+import org.linphone.ui.call.view.VuMeterView
 import org.linphone.ui.call.view.RoundCornersTextureView
 
 /**
@@ -501,6 +502,12 @@ fun setParticipantTextureView(
     model.setTextureView(textureView)
 }
 
+@UiThread
+@BindingAdapter("vuMeterPercentage")
+fun setVuMeterPercentage(view: VuMeterView, percentage: Float) {
+    view.setVuMeterPercentage(percentage)
+}
+
 @UiThread
 @BindingAdapter("onValueChanged")
 fun AppCompatEditText.editTextSetting(lambda: () -> Unit) {

app/src/main/res/layout/call_actions_generic.xml

@@ -77,6 +77,28 @@
             app:layout_constraintStart_toStartOf="@id/toggle_video"
             app:layout_constraintEnd_toEndOf="@id/toggle_video"/>
 
+        <ImageView
+            android:id="@+id/toggle_mute_mic_background"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:selected="@{viewModel.isMicrophoneMuted}"
+            android:background="@drawable/in_call_button_background_red"
+            android:contentDescription="@null"
+            app:layout_constraintTop_toTopOf="@id/toggle_mute_mic"
+            app:layout_constraintBottom_toBottomOf="@id/toggle_mute_mic"
+            app:layout_constraintStart_toStartOf="@id/toggle_mute_mic"
+            app:layout_constraintEnd_toEndOf="@id/toggle_mute_mic" />
+
+        <org.linphone.ui.call.view.VuMeterView
+            android:id="@+id/record_volume_vu_meter"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            vuMeterPercentage="@{viewModel.microphoneRecordingVolume}"
+            app:layout_constraintTop_toTopOf="@id/toggle_mute_mic_background"
+            app:layout_constraintBottom_toBottomOf="@id/toggle_mute_mic_background"
+            app:layout_constraintStart_toStartOf="@id/toggle_mute_mic_background"
+            app:layout_constraintEnd_toEndOf="@id/toggle_mute_mic_background" />
+
         <ImageView
             android:onClick="@{() -> viewModel.toggleMuteMicrophone()}"
             android:id="@+id/toggle_mute_mic"
@@ -84,9 +106,7 @@
             android:layout_height="@dimen/call_button_size"
             android:layout_marginEnd="16dp"
             android:padding="@dimen/call_button_icon_padding"
-            android:selected="@{viewModel.isMicrophoneMuted}"
             android:src="@{viewModel.isMicrophoneMuted ? @drawable/microphone_slash : @drawable/microphone, default=@drawable/microphone}"
-            android:background="@drawable/in_call_button_background_red"
             android:contentDescription="@string/content_description_toggle_microphone"
             app:tint="@color/in_call_button_tint_color"
             app:layout_constraintTop_toBottomOf="@id/call_actions_handle"

app/src/main/res/layout/call_outgoing_actions.xml

@@ -65,6 +65,28 @@
             app:layout_constraintStart_toEndOf="@id/hang_up"
             app:layout_constraintEnd_toStartOf="@id/toggle_mute_mic" />
 
+        <ImageView
+            android:id="@+id/toggle_mute_mic_background"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:selected="@{viewModel.isMicrophoneMuted}"
+            android:background="@drawable/in_call_button_background_red"
+            android:contentDescription="@null"
+            app:layout_constraintTop_toTopOf="@id/toggle_mute_mic"
+            app:layout_constraintBottom_toBottomOf="@id/toggle_mute_mic"
+            app:layout_constraintStart_toStartOf="@id/toggle_mute_mic"
+            app:layout_constraintEnd_toEndOf="@id/toggle_mute_mic" />
+
+        <org.linphone.ui.call.view.VuMeterView
+            android:id="@+id/record_volume_vu_meter"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            vuMeterPercentage="@{viewModel.microphoneRecordingVolume}"
+            app:layout_constraintTop_toTopOf="@id/toggle_mute_mic_background"
+            app:layout_constraintBottom_toBottomOf="@id/toggle_mute_mic_background"
+            app:layout_constraintStart_toStartOf="@id/toggle_mute_mic_background"
+            app:layout_constraintEnd_toEndOf="@id/toggle_mute_mic_background" />
+
         <ImageView
             android:onClick="@{() -> viewModel.toggleMuteMicrophone()}"
             android:id="@+id/toggle_mute_mic"
@@ -72,12 +94,11 @@
             android:layout_height="@dimen/call_button_size"
             android:layout_marginEnd="16dp"
             android:padding="@dimen/call_button_icon_padding"
-            android:contentDescription="@string/content_description_toggle_microphone"
             android:src="@{viewModel.isMicrophoneMuted ? @drawable/microphone_slash : @drawable/microphone, default=@drawable/microphone}"
-            android:background="@drawable/in_call_button_background_red"
+            android:contentDescription="@string/content_description_toggle_microphone"
             app:tint="@color/in_call_button_tint_color"
-            app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintTop_toBottomOf="@id/call_actions_handle"
+            app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintStart_toEndOf="@id/toggle_video"
             app:layout_constraintEnd_toStartOf="@id/change_audio_output" />
 

app/src/main/res/values/colors.xml

@@ -5,6 +5,7 @@
     <color name="bc_white">#FFFFFF</color>
     <color name="dialog_background">#99000000</color><!-- 60% opacity -->
     <color name="shadow">#10000000</color>
+    <color name="vu_meter">#3CFFFFFF</color>
 
     <color name="background_color_dark_mode">#191919</color>
     <color name="background_color_alt_dark_mode">#303030</color>