WIP: Audio editor

app/build.gradle.kts

@@ -100,5 +100,7 @@ dependencies {
     implementation(libs.androidx.swiperefreshlayout)
     implementation(libs.androidx.constraintlayout)
     implementation(libs.tandroidlame)
+    implementation(libs.bundles.audiotool)
+    implementation(libs.bundles.amplituda)
     implementation(libs.autofittextview)
 }

app/src/main/AndroidManifest.xml

@@ -77,6 +77,8 @@
             </intent-filter>
         </activity>
 
+        <activity android:name=".activities.EditRecordingActivity" />
+
         <activity
             android:name=".activities.SettingsActivity"
             android:configChanges="orientation"

app/src/main/kotlin/com/simplemobiletools/voicerecorder/activities/EditRecordingActivity.kt

@@ -0,0 +1,362 @@
+package com.simplemobiletools.voicerecorder.activities
+
+import android.graphics.drawable.Drawable
+import android.media.AudioManager
+import android.media.MediaPlayer
+import android.net.Uri
+import android.os.Bundle
+import android.os.Handler
+import android.os.Looper
+import android.os.PowerManager
+import android.provider.DocumentsContract
+import android.widget.SeekBar
+import androidx.core.view.children
+import com.simplemobiletools.commons.extensions.*
+import com.simplemobiletools.commons.helpers.ensureBackgroundThread
+import com.simplemobiletools.voicerecorder.R
+import com.simplemobiletools.voicerecorder.databinding.ActivityEditRecordingBinding
+import com.simplemobiletools.voicerecorder.extensions.deleteRecordings
+import com.simplemobiletools.voicerecorder.extensions.getAllRecordings
+import com.simplemobiletools.voicerecorder.helpers.getAudioFileContentUri
+import com.simplemobiletools.voicerecorder.models.Recording
+import linc.com.amplituda.Amplituda
+import linc.com.amplituda.callback.AmplitudaSuccessListener
+import linc.com.library.AudioTool
+import java.io.File
+import java.util.Timer
+import java.util.TimerTask
+
+class EditRecordingActivity : SimpleActivity() {
+    companion object {
+        const val RECORDING_ID = "recording_id"
+    }
+
+    private var player: MediaPlayer? = null
+    private var progressTimer = Timer()
+    private lateinit var recording: Recording
+    private lateinit var currentRecording: Recording
+    private var progressStart: Float = 0f
+
+    private lateinit var binding: ActivityEditRecordingBinding
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        isMaterialActivity = true
+        super.onCreate(savedInstanceState)
+        binding = ActivityEditRecordingBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+        setupOptionsMenu()
+
+        updateMaterialActivityViews(binding.mainCoordinator, binding.recordingVisualizer, useTransparentNavigation = false, useTopSearchMenu = false)
+
+        val recordingId = intent.getIntExtra(RECORDING_ID, -1)
+        if (recordingId == -1) {
+            finish()
+            return
+        }
+
+        recording = getAllRecordings().first { it.id == recordingId }
+        currentRecording = recording
+//        AudioTool.getInstance(this)
+//            .withAudio(File(recording.path))
+//            .cutAudio("00:00:00", "00:00:00.250") {}
+//            .saveCurrentTo(recording.path)
+//            .release()
+
+//        binding.recordingVisualizer.waveProgressColor = getProperPrimaryColor()
+//        binding.recordingVisualizer.setSampleFrom(recording.path)
+        binding.recordingVisualizer.chunkColor = getProperPrimaryColor()
+        binding.recordingVisualizer.recreate()
+        binding.recordingVisualizer.editListener = {
+            if (binding.recordingVisualizer.startPosition >= 0f) {
+                binding.settingsToolbar.menu.children.forEach { it.isVisible = true }
+            } else {
+                binding.settingsToolbar.menu.children.forEach { it.isVisible = false }
+            }
+        }
+        updateVisualization()
+//        android.media.MediaCodec.createByCodecName().createInputSurface()
+//        binding.recordingVisualizer.update()
+
+        initMediaPlayer()
+        playRecording(recording.path, recording.id, recording.title, recording.duration, false)
+
+        binding.playerControlsWrapper.playPauseBtn.setOnClickListener {
+            togglePlayPause()
+        }
+        setupColors()
+    }
+
+    private fun updateVisualization() {
+        Amplituda(this).processAudio(currentRecording.path)
+            .get(AmplitudaSuccessListener {
+                binding.recordingVisualizer.recreate()
+                binding.recordingVisualizer.clearEditing()
+                binding.recordingVisualizer.putAmplitudes(it.amplitudesAsList())
+            })
+    }
+
+    private fun setupColors() {
+        val properPrimaryColor = getProperPrimaryColor()
+        updateTextColors(binding.mainCoordinator)
+
+        val textColor = getProperTextColor()
+        arrayListOf(binding.playerControlsWrapper.previousBtn, binding.playerControlsWrapper.nextBtn).forEach {
+            it.applyColorFilter(textColor)
+        }
+
+        binding.playerControlsWrapper.playPauseBtn.background.applyColorFilter(properPrimaryColor)
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
+    }
+
+    private fun setupOptionsMenu() {
+        binding.settingsToolbar.inflateMenu(R.menu.menu_edit)
+//        binding.settingsToolbar.toggleHideOnScroll(false)
+//        binding.settingsToolbar.setupMenu()
+
+//        binding.settingsToolbar.onSearchOpenListener = {
+//            if (binding.viewPager.currentItem == 0) {
+//                binding.viewPager.currentItem = 1
+//            }
+//        }
+
+//        binding.settingsToolbar.onSearchTextChangedListener = { text ->
+//            getPagerAdapter()?.searchTextChanged(text)
+//        }
+
+        binding.settingsToolbar.menu.children.forEach { it.isVisible = false }
+        binding.settingsToolbar.setOnMenuItemClickListener { menuItem ->
+            when (menuItem.itemId) {
+                R.id.play -> {
+                    val start = binding.recordingVisualizer.startPosition
+                    val end = binding.recordingVisualizer.endPosition
+
+                    val startMillis = start * currentRecording.duration
+                    val durationMillis = (end - start) * currentRecording.duration
+                    val startMillisPart = String.format("%.3f", startMillis - startMillis.toInt()).replace("0.", "")
+                    val durationMillisPart = String.format("%.3f", durationMillis - durationMillis.toInt()).replace("0.", "")
+                    val startFormatted = (startMillis.toInt()).getFormattedDuration(true) + ".$startMillisPart"
+                    val durationFormatted = (durationMillis.toInt()).getFormattedDuration(true) + ".$durationMillisPart"
+                    AudioTool.getInstance(this)
+                        .withAudio(File(currentRecording.path))
+                        .cutAudio(startFormatted, durationFormatted) {
+                            progressStart = binding.recordingVisualizer.startPosition
+                            playRecording(it.path, null, it.name, durationMillis.toInt(), true)
+                        }
+                        .release()
+//                    playRecording()
+                }
+                R.id.cut -> {
+                    val start = binding.recordingVisualizer.startPosition
+                    val end = binding.recordingVisualizer.endPosition
+
+                    val startMillis = start * currentRecording.duration
+                    val endMillis = end * currentRecording.duration
+                    val realEnd = (1 - end) * currentRecording.duration
+                    val startMillisPart = String.format("%.3f", startMillis - startMillis.toInt()).replace("0.", "")
+                    val endMillisPart = String.format("%.3f", endMillis - endMillis.toInt()).replace("0.", "")
+                    val realEndMillisPart = String.format("%.3f", realEnd - realEnd.toInt()).replace("0.", "")
+                    val startFormatted = (startMillis.toInt()).getFormattedDuration(true) + ".$startMillisPart"
+                    val endFormatted = (endMillis.toInt()).getFormattedDuration(true) + ".$endMillisPart"
+                    val realEndFormatted = (realEnd.toInt()).getFormattedDuration(true) + ".$realEndMillisPart"
+
+                    var leftPart: File? = null
+                    var rightPart: File? = null
+
+                    fun merge() {
+                        if (leftPart != null && rightPart != null) {
+                            ensureBackgroundThread {
+                                AudioTool.getInstance(this)
+                                    .joinAudios(arrayOf(leftPart, rightPart), "${currentRecording.path}.edit.${currentRecording.path.getFilenameExtension()}") {
+                                        runOnUiThread {
+                                            currentRecording = Recording(-1, it.name, it.path, it.lastModified().toInt(), (startMillis + realEnd).toInt(), it.getProperSize(false).toInt())
+                                            updateVisualization()
+                                            playRecording(currentRecording.path, currentRecording.id, currentRecording.title, currentRecording.duration, true)
+                                        }
+                                    }
+                            }
+                        }
+                    }
+
+                    AudioTool.getInstance(this)
+                        .withAudio(File(currentRecording.path))
+                        .cutAudio("00:00:00", startFormatted) {
+                            leftPart = it
+                            merge()
+                        }
+                    AudioTool.getInstance(this)
+                        .withAudio(File(currentRecording.path))
+                        .cutAudio(endFormatted, realEndFormatted) {
+                            rightPart = it
+                            merge()
+                        }
+                }
+//                R.id.save -> {
+//                    binding.recordingVisualizer.clearEditing()
+//                    currentRecording = recording
+//                    playRecording(currentRecording.path, currentRecording.id, currentRecording.title, currentRecording.duration, true)
+//                }
+                R.id.clear -> {
+                    progressStart = 0f
+                    binding.recordingVisualizer.clearEditing()
+                    playRecording(currentRecording.path, currentRecording.id, currentRecording.title, currentRecording.duration, true)
+                }
+                R.id.reset -> {
+                    progressStart = 0f
+                    binding.recordingVisualizer.clearEditing()
+                    currentRecording = recording
+                    playRecording(currentRecording.path, currentRecording.id, currentRecording.title, currentRecording.duration, true)
+                }
+                else -> return@setOnMenuItemClickListener false
+            }
+            return@setOnMenuItemClickListener true
+        }
+    }
+
+    private fun initMediaPlayer() {
+        player = MediaPlayer().apply {
+            setWakeMode(this@EditRecordingActivity, PowerManager.PARTIAL_WAKE_LOCK)
+            setAudioStreamType(AudioManager.STREAM_MUSIC)
+
+            setOnCompletionListener {
+                progressTimer.cancel()
+                binding.playerControlsWrapper.playerProgressbar.progress = binding.playerControlsWrapper.playerProgressbar.max
+                binding.playerControlsWrapper.playerProgressCurrent.text = binding.playerControlsWrapper.playerProgressMax.text
+                binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
+            }
+
+            setOnPreparedListener {
+//                setupProgressTimer()
+//                player?.start()
+            }
+        }
+    }
+
+    fun playRecording(path: String, id: Int?, title: String?, duration: Int?, playOnPrepared: Boolean) {
+        resetProgress(title, duration)
+//        (binding.recordingsList.adapter as RecordingsAdapter).updateCurrentRecording(recording.id)
+//        playOnPreparation = playOnPrepared
+
+        player!!.apply {
+            reset()
+
+            try {
+                val uri = Uri.parse(path)
+                when {
+                    DocumentsContract.isDocumentUri(this@EditRecordingActivity, uri) -> {
+                        setDataSource(this@EditRecordingActivity, uri)
+                    }
+
+                    path.isEmpty() -> {
+                        setDataSource(this@EditRecordingActivity, getAudioFileContentUri(id?.toLong() ?: 0))
+                    }
+
+                    else -> {
+                        setDataSource(path)
+                    }
+                }
+            } catch (e: Exception) {
+                showErrorToast(e)
+                return
+            }
+
+            try {
+                prepareAsync()
+            } catch (e: Exception) {
+                showErrorToast(e)
+                return
+            }
+        }
+
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
+        binding.playerControlsWrapper.playerProgressbar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+            override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
+                if (fromUser) {
+                    player?.seekTo(progress * 1000)
+                    binding.playerControlsWrapper.playerProgressCurrent.text = progress.getFormattedDuration()
+                    resumePlayback()
+                }
+            }
+
+            override fun onStartTrackingTouch(seekBar: SeekBar) {}
+
+            override fun onStopTrackingTouch(seekBar: SeekBar) {}
+        })
+    }
+
+    private fun setupProgressTimer() {
+        progressTimer.cancel()
+        progressTimer = Timer()
+        progressTimer.scheduleAtFixedRate(getProgressUpdateTask(), 100, 100)
+    }
+
+    private fun getProgressUpdateTask() = object : TimerTask() {
+        override fun run() {
+            Handler(Looper.getMainLooper()).post {
+                if (player != null) {
+                    binding.recordingVisualizer.updateProgress(player!!.currentPosition.toFloat() / (currentRecording.duration * 1000) + progressStart)
+                    val progress = Math.round(player!!.currentPosition / 1000.toDouble()).toInt()
+                    updateCurrentProgress(progress)
+                    binding.playerControlsWrapper.playerProgressbar.progress = progress
+                }
+            }
+        }
+    }
+
+    private fun updateCurrentProgress(seconds: Int) {
+        binding.playerControlsWrapper.playerProgressCurrent.text = seconds.getFormattedDuration()
+    }
+
+    private fun resetProgress(title: String?, duration: Int?) {
+        updateCurrentProgress(0)
+        binding.playerControlsWrapper.playerProgressbar.progress = 0
+        binding.playerControlsWrapper.playerProgressbar.max = duration ?: 0
+        binding.playerControlsWrapper.playerTitle.text = title ?: ""
+        binding.playerControlsWrapper.playerProgressMax.text = (duration ?: 0).getFormattedDuration()
+    }
+
+    private fun togglePlayPause() {
+        if (getIsPlaying()) {
+            pausePlayback()
+        } else {
+            resumePlayback()
+        }
+    }
+
+    private fun pausePlayback() {
+        player?.pause()
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
+        progressTimer.cancel()
+    }
+
+    private fun resumePlayback() {
+        player?.start()
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(true))
+        setupProgressTimer()
+    }
+
+    private fun getToggleButtonIcon(isPlaying: Boolean): Drawable {
+        val drawable = if (isPlaying) com.simplemobiletools.commons.R.drawable.ic_pause_vector else com.simplemobiletools.commons.R.drawable.ic_play_vector
+        return resources.getColoredDrawableWithColor(drawable, getProperPrimaryColor().getContrastColor())
+    }
+
+    private fun skip(forward: Boolean) {
+//        val curr = player?.currentPosition ?: return
+//        var newProgress = if (forward) curr + FAST_FORWARD_SKIP_MS else curr - FAST_FORWARD_SKIP_MS
+//        if (newProgress > player!!.duration) {
+//            newProgress = player!!.duration
+//        }
+//
+//        player!!.seekTo(newProgress)
+//        resumePlayback()
+    }
+
+    private fun getIsPlaying() = player?.isPlaying == true
+
+    override fun onResume() {
+        super.onResume()
+    }
+
+    override fun onPause() {
+        super.onPause()
+    }
+}

app/src/main/kotlin/com/simplemobiletools/voicerecorder/adapters/RecordingsAdapter.kt

@@ -1,5 +1,6 @@
 package com.simplemobiletools.voicerecorder.adapters
 
+import android.content.Intent
 import android.view.*
 import android.widget.PopupMenu
 import android.widget.TextView
@@ -11,6 +12,7 @@ import com.simplemobiletools.commons.helpers.isQPlus
 import com.simplemobiletools.commons.views.MyRecyclerView
 import com.simplemobiletools.voicerecorder.BuildConfig
 import com.simplemobiletools.voicerecorder.R
+import com.simplemobiletools.voicerecorder.activities.EditRecordingActivity
 import com.simplemobiletools.voicerecorder.activities.SimpleActivity
 import com.simplemobiletools.voicerecorder.databinding.ItemRecordingBinding
 import com.simplemobiletools.voicerecorder.dialogs.DeleteConfirmationDialog
@@ -281,6 +283,13 @@ class RecordingsAdapter(
                         }
                     }
 
+                    R.id.cab_edit -> {
+                        Intent(activity, EditRecordingActivity::class.java).apply {
+                            putExtra(EditRecordingActivity.RECORDING_ID, recordingId)
+                            activity.startActivity(this)
+                        }
+                    }
+
                     R.id.cab_delete -> {
                         executeItemMenuOperation(recordingId, removeAfterCallback = false) {
                             askConfirmDelete()

app/src/main/kotlin/com/simplemobiletools/voicerecorder/fragments/PlayerFragment.kt

@@ -84,23 +84,23 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
     }
 
     private fun setupViews() {
-        binding.playPauseBtn.setOnClickListener {
-            if (playedRecordingIDs.empty() || binding.playerProgressbar.max == 0) {
-                binding.nextBtn.callOnClick()
+        binding.playerControlsWrapper.playPauseBtn.setOnClickListener {
+            if (playedRecordingIDs.empty() || binding.playerControlsWrapper.playerProgressbar.max == 0) {
+                binding.playerControlsWrapper.nextBtn.callOnClick()
             } else {
                 togglePlayPause()
             }
         }
 
-        binding.playerProgressCurrent.setOnClickListener {
+        binding.playerControlsWrapper.playerProgressCurrent.setOnClickListener {
             skip(false)
         }
 
-        binding.playerProgressMax.setOnClickListener {
+        binding.playerControlsWrapper.playerProgressMax.setOnClickListener {
             skip(true)
         }
 
-        binding.previousBtn.setOnClickListener {
+        binding.playerControlsWrapper.previousBtn.setOnClickListener {
             if (playedRecordingIDs.isEmpty()) {
                 return@setOnClickListener
             }
@@ -116,14 +116,14 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
             playRecording(prevRecording, true)
         }
 
-        binding.playerTitle.setOnLongClickListener {
-            if (binding.playerTitle.value.isNotEmpty()) {
-                context.copyToClipboard(binding.playerTitle.value)
+        binding.playerControlsWrapper.playerTitle.setOnLongClickListener {
+            if (binding.playerControlsWrapper.playerTitle.value.isNotEmpty()) {
+                context.copyToClipboard(binding.playerControlsWrapper.playerTitle.value)
             }
             true
         }
 
-        binding.nextBtn.setOnClickListener {
+        binding.playerControlsWrapper.nextBtn.setOnClickListener {
             val adapter = getRecordingsAdapter()
             if (adapter == null || adapter.recordings.isEmpty()) {
                 return@setOnClickListener
@@ -193,9 +193,9 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
 
             setOnCompletionListener {
                 progressTimer.cancel()
-                binding.playerProgressbar.progress = binding.playerProgressbar.max
-                binding.playerProgressCurrent.text = binding.playerProgressMax.text
-                binding.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
+                binding.playerControlsWrapper.playerProgressbar.progress = binding.playerControlsWrapper.playerProgressbar.max
+                binding.playerControlsWrapper.playerProgressCurrent.text = binding.playerControlsWrapper.playerProgressMax.text
+                binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
             }
 
             setOnPreparedListener {
@@ -245,12 +245,12 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
             }
         }
 
-        binding.playPauseBtn.setImageDrawable(getToggleButtonIcon(playOnPreparation))
-        binding.playerProgressbar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(playOnPreparation))
+        binding.playerControlsWrapper.playerProgressbar.setOnSeekBarChangeListener(object : SeekBar.OnSeekBarChangeListener {
             override fun onProgressChanged(seekBar: SeekBar, progress: Int, fromUser: Boolean) {
                 if (fromUser && !playedRecordingIDs.isEmpty()) {
                     player?.seekTo(progress * 1000)
-                    binding.playerProgressCurrent.text = progress.getFormattedDuration()
+                    binding.playerControlsWrapper.playerProgressCurrent.text = progress.getFormattedDuration()
                     resumePlayback()
                 }
             }
@@ -273,22 +273,22 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
                 if (player != null) {
                     val progress = Math.round(player!!.currentPosition / 1000.toDouble()).toInt()
                     updateCurrentProgress(progress)
-                    binding.playerProgressbar.progress = progress
+                    binding.playerControlsWrapper.playerProgressbar.progress = progress
                 }
             }
         }
     }
 
     private fun updateCurrentProgress(seconds: Int) {
-        binding.playerProgressCurrent.text = seconds.getFormattedDuration()
+        binding.playerControlsWrapper.playerProgressCurrent.text = seconds.getFormattedDuration()
     }
 
     private fun resetProgress(recording: Recording?) {
         updateCurrentProgress(0)
-        binding.playerProgressbar.progress = 0
-        binding.playerProgressbar.max = recording?.duration ?: 0
-        binding.playerTitle.text = recording?.title ?: ""
-        binding.playerProgressMax.text = (recording?.duration ?: 0).getFormattedDuration()
+        binding.playerControlsWrapper.playerProgressbar.progress = 0
+        binding.playerControlsWrapper.playerProgressbar.max = recording?.duration ?: 0
+        binding.playerControlsWrapper.playerTitle.text = recording?.title ?: ""
+        binding.playerControlsWrapper.playerProgressMax.text = (recording?.duration ?: 0).getFormattedDuration()
     }
 
     fun onSearchTextChanged(text: String) {
@@ -307,13 +307,13 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
 
     private fun pausePlayback() {
         player?.pause()
-        binding.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
         progressTimer.cancel()
     }
 
     private fun resumePlayback() {
         player?.start()
-        binding.playPauseBtn.setImageDrawable(getToggleButtonIcon(true))
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(true))
         setupProgressTimer()
     }
 
@@ -352,12 +352,12 @@ class PlayerFragment(context: Context, attributeSet: AttributeSet) : MyViewPager
         context.updateTextColors(binding.playerHolder)
 
         val textColor = context.getProperTextColor()
-        arrayListOf(binding.previousBtn, binding.nextBtn).forEach {
+        arrayListOf(binding.playerControlsWrapper.previousBtn, binding.playerControlsWrapper.nextBtn).forEach {
             it.applyColorFilter(textColor)
         }
 
-        binding.playPauseBtn.background.applyColorFilter(properPrimaryColor)
-        binding.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
+        binding.playerControlsWrapper.playPauseBtn.background.applyColorFilter(properPrimaryColor)
+        binding.playerControlsWrapper.playPauseBtn.setImageDrawable(getToggleButtonIcon(false))
     }
 
     fun finishActMode() = getRecordingsAdapter()?.finishActMode()

app/src/main/kotlin/com/simplemobiletools/voicerecorder/views/AudioEditorView.kt

@@ -0,0 +1,188 @@
+package com.simplemobiletools.voicerecorder.views
+
+import android.content.Context
+import android.graphics.Canvas
+import android.graphics.Color
+import android.graphics.Paint
+import android.util.AttributeSet
+import android.view.MotionEvent
+import android.view.View
+import com.simplemobiletools.commons.extensions.adjustAlpha
+import com.simplemobiletools.commons.extensions.getProperPrimaryColor
+import com.simplemobiletools.commons.extensions.getProperTextColor
+import com.simplemobiletools.commons.helpers.LOWER_ALPHA
+import com.visualizer.amplitude.dp
+import kotlin.math.abs
+import kotlin.math.max
+import kotlin.math.min
+
+class AudioEditorView @JvmOverloads constructor(
+    context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = 0
+) : View(context, attrs, defStyleAttr) {
+    private val chunkPaint = Paint()
+    private val highlightPaint = Paint()
+    private val progressPaint = Paint()
+
+    private var chunks = ArrayList<Float>()
+    private var topBottomPadding = 6.dp()
+
+    private var startX: Float = -1f
+    private var endX: Float = -1f
+
+    private var currentProgress: Float = 0f
+
+    private enum class Dragging {
+        START,
+        END,
+        NONE
+    }
+
+    private var dragging = Dragging.NONE
+
+    var startPosition: Float = -1f
+    var endPosition: Float = -1f
+
+    var editListener: (() -> Unit)? = null
+
+    var chunkColor = Color.RED
+        set(value) {
+            chunkPaint.color = value
+            field = value
+        }
+    private var chunkWidth = 20.dp()
+        set(value) {
+            chunkPaint.strokeWidth = value
+            field = value
+        }
+    private var chunkSpace = 1.dp()
+    var chunkMinHeight = 3.dp()  // recommended size > 10 dp
+    var chunkRoundedCorners = false
+        set(value) {
+            if (value) {
+                chunkPaint.strokeCap = Paint.Cap.ROUND
+            } else {
+                chunkPaint.strokeCap = Paint.Cap.BUTT
+            }
+            field = value
+        }
+
+    init {
+        chunkPaint.strokeWidth = chunkWidth
+        chunkPaint.color = chunkColor
+        chunkRoundedCorners = false
+        highlightPaint.color = context.getProperPrimaryColor().adjustAlpha(LOWER_ALPHA)
+        progressPaint.color = context.getProperTextColor()
+        progressPaint.strokeWidth = 4.dp()
+    }
+
+    fun recreate() {
+        chunks.clear()
+        invalidate()
+    }
+
+    fun clearEditing() {
+        startX = -1f
+        endX = -1f
+        startPosition = -1f
+        endPosition = -1f
+        editListener?.invoke()
+        invalidate()
+    }
+
+    fun putAmplitudes(amplitudes: List<Int>) {
+        val maxAmp = amplitudes.max()
+        chunkWidth = (1.0f / amplitudes.size) * (2.0f / 3)
+        chunkSpace = chunkWidth / 2
+
+        chunks.addAll(amplitudes.map { it.toFloat() / maxAmp })
+
+        invalidate()
+    }
+
+    override fun onDraw(canvas: Canvas) {
+        super.onDraw(canvas)
+        if (chunkWidth < 1f) {
+            chunkWidth *= width
+            chunkSpace = chunkWidth / 2
+        }
+        val verticalCenter = height / 2
+        var x = chunkSpace
+        val maxHeight = height - (topBottomPadding * 2)
+        val verticalDrawScale = maxHeight - chunkMinHeight
+        if (verticalDrawScale == 0f) {
+            return
+        }
+
+        chunks.forEach {
+            val chunkHeight = it * verticalDrawScale + chunkMinHeight
+            val startY = verticalCenter - chunkHeight / 2
+            val stopY = verticalCenter + chunkHeight / 2
+
+            canvas.drawLine(x, startY, x, stopY, chunkPaint)
+            x += chunkWidth + chunkSpace
+        }
+
+        if (startPosition >= 0f || startX >= 0f ) {
+            val start: Float
+            val end: Float
+            if (startX >= 0f) {
+                start = startX
+                end = endX
+            } else {
+                start = width * startPosition
+                end = width * endPosition
+            }
+
+            canvas.drawRect(start, 0f, end, height.toFloat(), highlightPaint)
+        }
+
+        canvas.drawLine(width * currentProgress, 0f, width * currentProgress, height.toFloat(), progressPaint)
+    }
+
+    override fun onTouchEvent(event: MotionEvent?): Boolean {
+        when (event?.actionMasked) {
+            MotionEvent.ACTION_DOWN -> {
+                if (abs(event.x - startPosition * width) < 50.0f) {
+                    startX = event.x
+                    endX = endPosition * width
+                    dragging = Dragging.START
+                } else if (abs(event.x - endPosition * width) < 50.0f) {
+                    endX = event.x
+                    startX = startPosition * width
+                    dragging = Dragging.END
+                } else {
+                    startX = event.x
+                    endX = event.x
+                    dragging = Dragging.END
+                }
+            }
+            MotionEvent.ACTION_MOVE -> {
+                if (dragging == Dragging.START) {
+                    startX = event.x
+                } else if (dragging == Dragging.END) {
+                    endX = event.x
+                }
+            }
+            MotionEvent.ACTION_UP -> {
+                if (dragging == Dragging.START) {
+                    startX = event.x
+                } else if (dragging == Dragging.END) {
+                    endX = event.x
+                }
+                dragging = Dragging.NONE
+                startPosition = min(startX, endX) / width
+                endPosition = max(startX, endX) / width
+                startX = -1f
+                endX = -1f
+            }
+        }
+        invalidate()
+        editListener?.invoke()
+        return true
+    }
+
+    fun updateProgress(progress: Float) {
+        currentProgress = progress
+        invalidate()
+    }
+}

app/src/main/res/drawable/ic_cut_vector.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M9.64,7.64c0.23,-0.5 0.36,-1.05 0.36,-1.64 0,-2.21 -1.79,-4 -4,-4S2,3.79 2,6s1.79,4 4,4c0.59,0 1.14,-0.13 1.64,-0.36L10,12l-2.36,2.36C7.14,14.13 6.59,14 6,14c-2.21,0 -4,1.79 -4,4s1.79,4 4,4 4,-1.79 4,-4c0,-0.59 -0.13,-1.14 -0.36,-1.64L12,14l7,7h3v-1L9.64,7.64zM6,8c-1.1,0 -2,-0.89 -2,-2s0.9,-2 2,-2 2,0.89 2,2 -0.9,2 -2,2zM6,20c-1.1,0 -2,-0.89 -2,-2s0.9,-2 2,-2 2,0.89 2,2 -0.9,2 -2,2zM12,12.5c-0.28,0 -0.5,-0.22 -0.5,-0.5s0.22,-0.5 0.5,-0.5 0.5,0.22 0.5,0.5 -0.22,0.5 -0.5,0.5zM19,3l-6,6 2,2 7,-7L22,3z"/>
+</vector>

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

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/main_coordinator"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <com.google.android.material.appbar.MaterialToolbar
+        android:id="@+id/settings_toolbar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:background="@color/color_primary"
+        app:title="@string/settings"
+        app:titleTextAppearance="@style/AppTheme.ActionBar.TitleTextStyle" />
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/content_wrapper"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_marginTop="?attr/actionBarSize">
+
+        <com.simplemobiletools.voicerecorder.views.AudioEditorView
+            android:id="@+id/recording_visualizer"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintBottom_toTopOf="@+id/player_controls_wrapper"
+            android:layout_marginTop="?attr/actionBarSize"
+            android:layout_marginStart="@dimen/big_margin"
+            android:layout_marginEnd="@dimen/big_margin" />
+
+        <include
+            android:id="@+id/player_controls_wrapper"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/recording_visualizer"
+            layout="@layout/layout_player_controls" />
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <com.simplemobiletools.voicerecorder.fragments.PlayerFragment xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
-    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/player_holder"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -37,120 +36,7 @@
 
     </com.qtalk.recyclerviewfastscroller.RecyclerViewFastScroller>
 
-    <RelativeLayout
+    <include
         android:id="@+id/player_controls_wrapper"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        tools:ignore="HardcodedText">
-
-        <View
-            android:id="@+id/player_divider"
-            android:layout_width="match_parent"
-            android:layout_height="1px"
-            android:background="@color/divider_grey"
-            android:importantForAccessibility="no" />
-
-        <com.simplemobiletools.commons.views.MyTextView
-            android:id="@+id/player_title"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_marginTop="@dimen/medium_margin"
-            android:ellipsize="end"
-            android:gravity="center_horizontal"
-            android:maxLines="1"
-            android:padding="@dimen/activity_margin"
-            android:textSize="@dimen/big_text_size"
-            tools:text="Recording title" />
-
-        <com.simplemobiletools.commons.views.MyTextView
-            android:id="@+id/player_progress_current"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_below="@+id/player_controls"
-            android:layout_alignTop="@+id/player_progressbar"
-            android:layout_alignBottom="@+id/player_progressbar"
-            android:background="?attr/selectableItemBackgroundBorderless"
-            android:gravity="center_vertical"
-            android:maxLines="1"
-            android:paddingStart="@dimen/normal_margin"
-            android:paddingEnd="@dimen/medium_margin"
-            android:text="00:00" />
-
-        <com.simplemobiletools.commons.views.MySeekBar
-            android:id="@+id/player_progressbar"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_below="@+id/player_title"
-            android:layout_toStartOf="@+id/player_progress_max"
-            android:layout_toEndOf="@+id/player_progress_current"
-            android:clickable="true"
-            android:focusable="true"
-            android:max="0"
-            android:paddingTop="@dimen/normal_margin"
-            android:paddingBottom="@dimen/normal_margin" />
-
-        <com.simplemobiletools.commons.views.MyTextView
-            android:id="@+id/player_progress_max"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_alignTop="@+id/player_progressbar"
-            android:layout_alignBottom="@+id/player_progressbar"
-            android:layout_alignParentEnd="true"
-            android:background="?attr/selectableItemBackgroundBorderless"
-            android:gravity="center_vertical"
-            android:maxLines="1"
-            android:paddingStart="@dimen/medium_margin"
-            android:paddingEnd="@dimen/normal_margin"
-            android:text="00:00" />
-
-        <RelativeLayout
-            android:id="@+id/player_controls"
-            android:layout_width="match_parent"
-            android:layout_height="wrap_content"
-            android:layout_below="@+id/player_progressbar"
-            android:orientation="horizontal">
-
-            <ImageView
-                android:id="@+id/previous_btn"
-                android:layout_width="@dimen/normal_icon_size"
-                android:layout_height="@dimen/normal_icon_size"
-                android:layout_alignTop="@+id/play_pause_btn"
-                android:layout_alignBottom="@+id/play_pause_btn"
-                android:layout_centerVertical="true"
-                android:layout_toStartOf="@+id/play_pause_btn"
-                android:background="?attr/selectableItemBackgroundBorderless"
-                android:contentDescription="@string/previous"
-                android:padding="@dimen/medium_margin"
-                android:src="@drawable/ic_previous_vector" />
-
-            <ImageView
-                android:id="@+id/play_pause_btn"
-                android:layout_width="@dimen/toggle_recording_button_size"
-                android:layout_height="@dimen/toggle_recording_button_size"
-                android:layout_centerHorizontal="true"
-                android:layout_marginStart="@dimen/player_button_margin"
-                android:layout_marginEnd="@dimen/player_button_margin"
-                android:layout_marginBottom="@dimen/big_margin"
-                android:background="@drawable/circle_background"
-                android:contentDescription="@string/playpause"
-                android:padding="@dimen/activity_margin"
-                android:src="@drawable/ic_play_vector" />
-
-            <ImageView
-                android:id="@+id/next_btn"
-                android:layout_width="@dimen/normal_icon_size"
-                android:layout_height="@dimen/normal_icon_size"
-                android:layout_alignTop="@+id/play_pause_btn"
-                android:layout_alignBottom="@+id/play_pause_btn"
-                android:layout_centerVertical="true"
-                android:layout_toEndOf="@+id/play_pause_btn"
-                android:background="?attr/selectableItemBackgroundBorderless"
-                android:contentDescription="@string/next"
-                android:padding="@dimen/medium_margin"
-                android:src="@drawable/ic_next_vector" />
-
-        </RelativeLayout>
-    </RelativeLayout>
+        layout="@layout/layout_player_controls" />
 </com.simplemobiletools.voicerecorder.fragments.PlayerFragment>

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

@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/player_controls_wrapper"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    app:layout_constraintBottom_toBottomOf="parent"
+    app:layout_constraintStart_toStartOf="parent"
+    tools:ignore="HardcodedText"
+    tools:showIn="@layout/fragment_player">
+
+    <View
+        android:id="@+id/player_divider"
+        android:layout_width="match_parent"
+        android:layout_height="1px"
+        android:background="@color/divider_grey"
+        android:importantForAccessibility="no" />
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/player_title"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="@dimen/medium_margin"
+        android:ellipsize="end"
+        android:gravity="center_horizontal"
+        android:maxLines="1"
+        android:padding="@dimen/activity_margin"
+        android:textSize="@dimen/big_text_size"
+        tools:text="Recording title" />
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/player_progress_current"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/player_controls"
+        android:layout_alignTop="@+id/player_progressbar"
+        android:layout_alignBottom="@+id/player_progressbar"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:gravity="center_vertical"
+        android:maxLines="1"
+        android:paddingStart="@dimen/normal_margin"
+        android:paddingEnd="@dimen/medium_margin"
+        android:text="00:00" />
+
+    <com.simplemobiletools.commons.views.MySeekBar
+        android:id="@+id/player_progressbar"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/player_title"
+        android:layout_toStartOf="@+id/player_progress_max"
+        android:layout_toEndOf="@+id/player_progress_current"
+        android:clickable="true"
+        android:focusable="true"
+        android:max="0"
+        android:paddingTop="@dimen/normal_margin"
+        android:paddingBottom="@dimen/normal_margin" />
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/player_progress_max"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_alignTop="@+id/player_progressbar"
+        android:layout_alignBottom="@+id/player_progressbar"
+        android:layout_alignParentEnd="true"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:gravity="center_vertical"
+        android:maxLines="1"
+        android:paddingStart="@dimen/medium_margin"
+        android:paddingEnd="@dimen/normal_margin"
+        android:text="00:00" />
+
+    <RelativeLayout
+        android:id="@+id/player_controls"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/player_progressbar"
+        android:orientation="horizontal">
+
+        <ImageView
+            android:id="@+id/previous_btn"
+            android:layout_width="@dimen/normal_icon_size"
+            android:layout_height="@dimen/normal_icon_size"
+            android:layout_alignTop="@+id/play_pause_btn"
+            android:layout_alignBottom="@+id/play_pause_btn"
+            android:layout_centerVertical="true"
+            android:layout_toStartOf="@+id/play_pause_btn"
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/previous"
+            android:padding="@dimen/medium_margin"
+            android:src="@drawable/ic_previous_vector" />
+
+        <ImageView
+            android:id="@+id/play_pause_btn"
+            android:layout_width="@dimen/toggle_recording_button_size"
+            android:layout_height="@dimen/toggle_recording_button_size"
+            android:layout_centerHorizontal="true"
+            android:layout_marginStart="@dimen/player_button_margin"
+            android:layout_marginEnd="@dimen/player_button_margin"
+            android:layout_marginBottom="@dimen/big_margin"
+            android:background="@drawable/circle_background"
+            android:contentDescription="@string/playpause"
+            android:padding="@dimen/activity_margin"
+            android:src="@drawable/ic_play_vector" />
+
+        <ImageView
+            android:id="@+id/next_btn"
+            android:layout_width="@dimen/normal_icon_size"
+            android:layout_height="@dimen/normal_icon_size"
+            android:layout_alignTop="@+id/play_pause_btn"
+            android:layout_alignBottom="@+id/play_pause_btn"
+            android:layout_centerVertical="true"
+            android:layout_toEndOf="@+id/play_pause_btn"
+            android:background="?attr/selectableItemBackgroundBorderless"
+            android:contentDescription="@string/next"
+            android:padding="@dimen/medium_margin"
+            android:src="@drawable/ic_next_vector" />
+
+    </RelativeLayout>
+</RelativeLayout>

app/src/main/res/menu/cab_recordings.xml

@@ -18,6 +18,12 @@
         android:icon="@drawable/ic_delete_vector"
         android:showAsAction="always"
         android:title="@string/delete" />
+    <item
+        android:id="@+id/cab_edit"
+        android:icon="@drawable/ic_edit_vector"
+        android:showAsAction="ifRoom"
+        android:title="@string/edit"
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/cab_open_with"
         android:showAsAction="never"

app/src/main/res/menu/menu_edit.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:ignore="AlwaysShowAction">
+    <item
+        android:id="@+id/play"
+        android:icon="@drawable/ic_play_vector"
+        android:title="Play"
+        app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/cut"
+        android:icon="@drawable/ic_cut_vector"
+        android:title="Cut"
+        app:showAsAction="ifRoom" />
+<!--    <item-->
+<!--        android:id="@+id/save"-->
+<!--        android:icon="@drawable/ic_save_vector"-->
+<!--        android:title="Save"-->
+<!--        app:showAsAction="ifRoom" />-->
+    <item
+        android:id="@+id/reset"
+        android:icon="@drawable/ic_reset_vector"
+        android:title="Reset"
+        app:showAsAction="ifRoom" />
+    <item
+        android:id="@+id/clear"
+        android:icon="@drawable/ic_cross_vector"
+        android:title="Clear"
+        app:showAsAction="ifRoom" />
+</menu>

gradle/libs.versions.toml

@@ -15,6 +15,11 @@ room = "2.6.0-alpha02"
 simple-commons = "257a2ab069"
 #AudioRecordView
 audiorecordview = "1.0.4"
+#AudioTool
+audiotool = "1.2.1"
+amplituda = "2.2.2"
+waveformseekbar = "5.0.1"
+mobileffmpeg = "4.4"
 #TAndroidLame
 tandroidlame = "1.1"
 #AutofitTextView
@@ -24,7 +29,7 @@ gradlePlugins-agp = "8.1.1"
 #build
 app-build-compileSDKVersion = "34"
 app-build-targetSDK = "34"
-app-build-minimumSDK = "23"
+app-build-minimumSDK = "24"
 app-build-javaVersion = "VERSION_17"
 app-build-kotlinJVMTarget = "17"
 #versioning
@@ -46,6 +51,11 @@ simple-tools-commons = { module = "com.github.SimpleMobileTools:Simple-Commons",
 eventbus = { module = "org.greenrobot:eventbus", version.ref = "eventbus" }
 #AudioRecordView
 audiorecordview = { module = "com.github.Armen101:AudioRecordView", version.ref = "audiorecordview" }
+#AudioTool
+audiotool = { module = "com.github.lincollincol:AudioTool", version.ref = "audiotool" }
+amplituda = { module = "com.github.lincollincol:amplituda", version.ref = "amplituda" }
+mobileffmpeg = { module = "com.arthenica:mobile-ffmpeg-full", version.ref = "mobileffmpeg" }
+waveformseekbar = { module = "com.github.massoudss:waveformSeekBar", version.ref = "waveformseekbar" }
 #TAndroidLame
 tandroidlame = { module = "com.github.naman14:TAndroidLame", version.ref = "tandroidlame" }
 #AutofitTextView
@@ -55,6 +65,14 @@ room = [
     "androidx-room-ktx",
     "androidx-room-runtime",
 ]
+audiotool = [
+    "audiotool",
+    "mobileffmpeg",
+]
+amplituda = [
+    "amplituda",
+    "waveformseekbar",
+]
 [plugins]
 android = { id = "com.android.application", version.ref = "gradlePlugins-agp" }
 kotlinAndroid = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }