fix: audio converting time [WPB-9705]

app/src/main/kotlin/com/wire/android/ui/home/conversations/sendmessage/SendMessageViewModel.kt

@@ -40,7 +40,7 @@ import com.wire.android.ui.home.messagecomposer.model.MessageBundle
 import com.wire.android.ui.home.messagecomposer.model.Ping
 import com.wire.android.ui.navArgs
 import com.wire.android.ui.sharing.SendMessagesSnackbarMessages
-import com.wire.android.util.AUDIO_MIME_TYPE
+import com.wire.android.util.SUPPORTED_AUDIO_MIME_TYPE
 import com.wire.android.util.ImageUtil
 import com.wire.android.util.dispatchers.DispatcherProvider
 import com.wire.android.util.getAudioLengthInMs
@@ -209,7 +209,7 @@ class SendMessageViewModel @Inject constructor(
                 handleAssetMessageBundle(
                     attachmentUri = messageBundle.attachmentUri,
                     conversationId = messageBundle.conversationId,
-                    specifiedMimeType = AUDIO_MIME_TYPE,
+                    specifiedMimeType = SUPPORTED_AUDIO_MIME_TYPE,
                 )
             }
 

app/src/main/kotlin/com/wire/android/ui/home/messagecomposer/recordaudio/AudioMediaRecorder.kt

@@ -17,13 +17,15 @@
  */
 package com.wire.android.ui.home.messagecomposer.recordaudio
 
-import android.content.Context
+import android.annotation.SuppressLint
+import android.media.AudioFormat
+import android.media.AudioRecord
 import android.media.MediaRecorder
-import android.os.Build
 import com.wire.android.appLogger
-import com.wire.android.util.fileDateTime
 import com.wire.android.util.dispatchers.DispatcherProvider
+import com.wire.android.util.fileDateTime
 import com.wire.kalium.logic.data.asset.KaliumFileSystem
+import com.wire.kalium.logic.feature.asset.GetAssetSizeLimitUseCaseImpl.Companion.ASSET_SIZE_DEFAULT_LIMIT_BYTES
 import com.wire.kalium.util.DateTimeUtil
 import dagger.hilt.android.scopes.ViewModelScoped
 import kotlinx.coroutines.CoroutineScope
@@ -32,13 +34,15 @@ import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.asSharedFlow
 import kotlinx.coroutines.launch
-import java.io.File
+import okio.Path
+import okio.buffer
 import java.io.IOException
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
 import javax.inject.Inject
 
 @ViewModelScoped
 class AudioMediaRecorder @Inject constructor(
-    private val context: Context,
     private val kaliumFileSystem: KaliumFileSystem,
     private val dispatcherProvider: DispatcherProvider
 ) {
@@ -47,88 +51,187 @@ class AudioMediaRecorder @Inject constructor(
         CoroutineScope(SupervisorJob() + dispatcherProvider.io())
     }
 
-    private var mediaRecorder: MediaRecorder? = null
+    private var audioRecorder: AudioRecord? = null
+    private var recordingThread: Thread? = null
+    private var isRecording = false
+    private var assetLimitInMB: Long = ASSET_SIZE_DEFAULT_LIMIT_BYTES
 
-    var originalOutputFile: File? = null
-    var effectsOutputFile: File? = null
+    var originalOutputPath: Path? = null
+    var effectsOutputPath: Path? = null
 
     private val _maxFileSizeReached = MutableSharedFlow<RecordAudioDialogState>()
     fun getMaxFileSizeReached(): Flow<RecordAudioDialogState> =
         _maxFileSizeReached.asSharedFlow()
 
+    @SuppressLint("MissingPermission")
     fun setUp(assetLimitInMegabyte: Long) {
-        if (mediaRecorder == null) {
-            mediaRecorder = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
-                MediaRecorder(context)
-            } else {
-                MediaRecorder()
-            }
-
-            originalOutputFile = kaliumFileSystem
+        assetLimitInMB = assetLimitInMegabyte
+        if (audioRecorder == null) {
+            val bufferSize = AudioRecord.getMinBufferSize(
+                SAMPLING_RATE,
+                AUDIO_CHANNELS,
+                AUDIO_ENCODING
+            )
+
+            audioRecorder = AudioRecord(
+                MediaRecorder.AudioSource.MIC,
+                SAMPLING_RATE,
+                AUDIO_CHANNELS,
+                AUDIO_ENCODING,
+                bufferSize
+            )
+
+            originalOutputPath = kaliumFileSystem
                 .tempFilePath(getRecordingAudioFileName())
-                .toFile()
 
-            effectsOutputFile = kaliumFileSystem
+            effectsOutputPath = kaliumFileSystem
                 .tempFilePath(getRecordingAudioEffectsFileName())
-                .toFile()
-
-            mediaRecorder?.setAudioSource(MediaRecorder.AudioSource.MIC)
-            mediaRecorder?.setAudioSamplingRate(SAMPLING_RATE)
-            mediaRecorder?.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4)
-            mediaRecorder?.setAudioEncoder(MediaRecorder.AudioEncoder.AAC)
-            mediaRecorder?.setAudioChannels(AUDIO_CHANNELS)
-            mediaRecorder?.setAudioEncodingBitRate(AUDIO_ENCONDING_BIT_RATE)
-            mediaRecorder?.setMaxFileSize(assetLimitInMegabyte)
-            mediaRecorder?.setOutputFile(originalOutputFile)
-
-            observeAudioFileSize(assetLimitInMegabyte)
         }
     }
 
     fun startRecording(): Boolean = try {
-            mediaRecorder?.prepare()
-            mediaRecorder?.start()
-            true
-        } catch (e: IllegalStateException) {
-            e.printStackTrace()
-            appLogger.e("[RecordAudio] startRecording: IllegalStateException - ${e.message}")
-            false
-        } catch (e: IOException) {
-            e.printStackTrace()
-            appLogger.e("[RecordAudio] startRecording: IOException - ${e.message}")
-            false
-        }
+        audioRecorder?.startRecording()
+        isRecording = true
+        recordingThread = Thread { writeAudioDataToFile() }
+        recordingThread?.start()
+        true
+    } catch (e: IllegalStateException) {
+        e.printStackTrace()
+        appLogger.e("[RecordAudio] startRecording: IllegalStateException - ${e.message}")
+        false
+    } catch (e: IOException) {
+        e.printStackTrace()
+        appLogger.e("[RecordAudio] startRecording: IOException - ${e.message}")
+        false
+    }
+
+    private fun writeWavHeader(bufferedSink: okio.BufferedSink, sampleRate: Int, channels: Int, bitsPerSample: Int) {
+        val byteRate = sampleRate * channels * (bitsPerSample / BITS_PER_BYTE)
+        val blockAlign = channels * (bitsPerSample / BITS_PER_BYTE)
+
+        // We use buffer() to correctly write the string values.
+        bufferedSink.writeUtf8(CHUNK_ID_RIFF) // Chunk ID
+        bufferedSink.writeIntLe(PLACEHOLDER_SIZE) // Placeholder for Chunk Size (will be updated later)
+        bufferedSink.writeUtf8(FORMAT_WAVE) // Format
+        bufferedSink.writeUtf8(SUBCHUNK1_ID_FMT) // Subchunk1 ID
+        bufferedSink.writeIntLe(SUBCHUNK1_SIZE_PCM) // Subchunk1 Size (PCM)
+        bufferedSink.writeShortLe(AUDIO_FORMAT_PCM) // Audio Format (PCM)
+        bufferedSink.writeShortLe(channels) // Number of Channels
+        bufferedSink.writeIntLe(sampleRate) // Sample Rate
+        bufferedSink.writeIntLe(byteRate) // Byte Rate
+        bufferedSink.writeShortLe(blockAlign) // Block Align
+        bufferedSink.writeShortLe(bitsPerSample) // Bits Per Sample
+        bufferedSink.writeUtf8(SUBCHUNK2_ID_DATA) // Subchunk2 ID
+        bufferedSink.writeIntLe(PLACEHOLDER_SIZE) // Placeholder for Subchunk2 Size (will be updated later)
+    }
+
+    private fun updateWavHeader(filePath: Path) {
+        val file = filePath.toFile()
+        val fileSize = file.length().toInt()
+        val dataSize = fileSize - HEADER_SIZE
+
+        val chunkSizeBuffer = ByteBuffer.allocate(INT_SIZE)
+        chunkSizeBuffer.order(ByteOrder.LITTLE_ENDIAN)
+        chunkSizeBuffer.putInt(fileSize - CHUNK_ID_SIZE)
+
+        val dataSizeBuffer = ByteBuffer.allocate(INT_SIZE)
+        dataSizeBuffer.order(ByteOrder.LITTLE_ENDIAN)
+        dataSizeBuffer.putInt(dataSize)
+
+        val randomAccessFile = java.io.RandomAccessFile(file, "rw")
+
+        // Update Chunk Size
+        randomAccessFile.seek(CHUNK_SIZE_OFFSET.toLong())
+        randomAccessFile.write(chunkSizeBuffer.array())
+
+        // Update Subchunk2 Size
+        randomAccessFile.seek(SUBCHUNK2_SIZE_OFFSET.toLong())
+        randomAccessFile.write(dataSizeBuffer.array())
+
+        randomAccessFile.close()
+
+        appLogger.i("Updated WAV Header: Chunk Size = ${fileSize - CHUNK_ID_SIZE}, Data Size = $dataSize")
+    }
 
     fun stop() {
-        mediaRecorder?.stop()
+        isRecording = false
+        audioRecorder?.stop()
+        recordingThread?.join()
     }
 
     fun release() {
-        mediaRecorder?.release()
+        audioRecorder?.release()
+        audioRecorder = null
     }
 
-    private fun observeAudioFileSize(assetLimitInMegabyte: Long) {
-        mediaRecorder?.setOnInfoListener { _, what, _ ->
-            if (what == MediaRecorder.MEDIA_RECORDER_INFO_MAX_FILESIZE_REACHED) {
-                scope.launch {
-                    _maxFileSizeReached.emit(
-                        RecordAudioDialogState.MaxFileSizeReached(
-                            maxSize = assetLimitInMegabyte.div(SIZE_OF_1MB)
+    private fun writeAudioDataToFile() {
+        val data = ByteArray(BUFFER_SIZE)
+        var sink: okio.Sink? = null
+
+        try {
+            sink = kaliumFileSystem.sink(originalOutputPath!!)
+            val bufferedSink = sink.buffer()
+
+            // Write WAV header
+            writeWavHeader(bufferedSink, SAMPLING_RATE, AUDIO_CHANNELS, BITS_PER_SAMPLE)
+
+            while (isRecording) {
+                val read = audioRecorder?.read(data, 0, BUFFER_SIZE) ?: 0
+                if (read > 0) {
+                    bufferedSink.write(data, 0, read)
+                }
+
+                // Check if the file size exceeds the limit
+                val currentSize = originalOutputPath!!.toFile().length()
+                if (currentSize > (assetLimitInMB * SIZE_OF_1MB)) {
+                    isRecording = false
+                    scope.launch {
+                        _maxFileSizeReached.emit(
+                            RecordAudioDialogState.MaxFileSizeReached(
+                                maxSize = assetLimitInMB / SIZE_OF_1MB
+                            )
                         )
-                    )
+                    }
+                    break
                 }
             }
+
+            // Close buffer to ensure all data is written
+            bufferedSink.close()
+
+            // Update WAV header with final file size
+            updateWavHeader(originalOutputPath!!)
+        } catch (e: IOException) {
+            e.printStackTrace()
+            appLogger.e("[RecordAudio] writeAudioDataToFile: IOException - ${e.message}")
+        } finally {
+            sink?.close()
         }
     }
 
-    private companion object {
-        fun getRecordingAudioFileName(): String =
-            "wire-audio-${DateTimeUtil.currentInstant().fileDateTime()}.m4a"
-        fun getRecordingAudioEffectsFileName(): String =
-            "wire-audio-${DateTimeUtil.currentInstant().fileDateTime()}-filter.m4a"
+    companion object {
+        fun getRecordingAudioFileName(): String = "wire-audio-${DateTimeUtil.currentInstant().fileDateTime()}.wav"
+        fun getRecordingAudioEffectsFileName(): String = "wire-audio-${DateTimeUtil.currentInstant().fileDateTime()}-filter.wav"
+
         const val SIZE_OF_1MB = 1024 * 1024
-        const val AUDIO_CHANNELS = 1
+        const val AUDIO_CHANNELS = 1 // Mono
         const val SAMPLING_RATE = 44100
-        const val AUDIO_ENCONDING_BIT_RATE = 96000
+        const val BUFFER_SIZE = 1024
+        const val AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT
+        const val BITS_PER_SAMPLE = 16
+        const val BITS_PER_BYTE = 8
+        const val HEADER_SIZE = 44
+        const val CHUNK_ID_SIZE = 8
+        const val INT_SIZE = 4
+        const val PLACEHOLDER_SIZE = 0
+        const val CHUNK_SIZE_OFFSET = 4
+        const val SUBCHUNK2_SIZE_OFFSET = 40
+        const val AUDIO_FORMAT_PCM = 1
+        const val SUBCHUNK1_SIZE_PCM = 16
+
+        const val CHUNK_ID_RIFF = "RIFF"
+        const val FORMAT_WAVE = "WAVE"
+        const val SUBCHUNK1_ID_FMT = "fmt "
+        const val SUBCHUNK2_ID_DATA = "data"
     }
 }

app/src/main/kotlin/com/wire/android/ui/home/messagecomposer/recordaudio/GenerateAudioFileWithEffectsUseCase.kt

@@ -20,29 +20,38 @@ package com.wire.android.ui.home.messagecomposer.recordaudio
 import android.content.Context
 import com.waz.audioeffect.AudioEffect
 import com.wire.android.appLogger
-import javax.inject.Singleton
+import com.wire.android.util.dispatchers.DispatcherProvider
+import kotlinx.coroutines.withContext
 import javax.inject.Inject
+import javax.inject.Singleton
 
 @Singleton
-class GenerateAudioFileWithEffectsUseCase @Inject constructor() {
+class GenerateAudioFileWithEffectsUseCase @Inject constructor(
+    private val dispatchers: DispatcherProvider,
+) {
     /**
      * Note: This UseCase can't be tested as we cannot mock `AudioEffect` from AVS.
      * Generates audio file with effects on received path from the original file path.
      *
      * @return Unit, as the content of audio with effects will be saved directly to received file path.
      */
-    operator fun invoke(
+    suspend operator fun invoke(
         context: Context,
         originalFilePath: String,
-        effectsFilePath: String
-    ) {
-        val audioEffectsResult = AudioEffect(context)
-            .applyEffectM4A(
-                originalFilePath,
-                effectsFilePath,
-                AudioEffect.AVS_AUDIO_EFFECT_VOCODER_MED,
-                true
-            )
+        effectsFilePath: String,
+    ) = withContext(dispatchers.io()) {
+        appLogger.i("[$TAG] -> Start generating audio file with effects")
+
+        val audioEffect = AudioEffect(context)
+        val effectType = AudioEffect.AVS_AUDIO_EFFECT_VOCODER_MED
+        val reduceNoise = true
+
+        val audioEffectsResult = audioEffect.applyEffectWav(
+            originalFilePath,
+            effectsFilePath,
+            effectType,
+            reduceNoise
+        )
 
         if (audioEffectsResult > -1) {
             appLogger.i("[$TAG] -> Audio file with effects generated successfully.")