desktop: video and audio players (#3052)

* desktop: video and audio players

* making player working without preinstalled VLC

* mac support

* don't use vlc lib when not needed

* updated jna version

* changes in script

* video player lazy loading

* mac script changes

* updated build gradle for preserving atrributes of file while copying

* apply the same file stats on libs to make VLC checker happy

* updated script

* changes

---------

Co-authored-by: Evgeny Poberezkin <2769109+epoberezkin@users.noreply.github.com>

apps/multiplatform/android/build.gradle.kts

@@ -139,8 +139,6 @@ dependencies {
     //implementation("androidx.compose.material:material-icons-extended:$compose_version")
     //implementation("androidx.compose.ui:ui-util:$compose_version")
 
-    implementation("com.google.accompanist:accompanist-pager:0.25.1")
-
     testImplementation("junit:junit:4.13.2")
     androidTestImplementation("androidx.test.ext:junit:1.1.3")
     androidTestImplementation("androidx.test.espresso:espresso-core:3.4.0")

apps/multiplatform/android/src/main/java/chat/simplex/app/MainActivity.kt

@@ -73,7 +73,7 @@ class MainActivity: FragmentActivity() {
 
   override fun onStop() {
     super.onStop()
-    VideoPlayer.stopAll()
+    VideoPlayerHolder.stopAll()
     AppLock.appWasHidden()
   }
 

apps/multiplatform/common/build.gradle.kts

@@ -97,6 +97,7 @@ kotlin {
         implementation("com.github.Dansoftowner:jSystemThemeDetector:3.6")
         implementation("com.sshtools:two-slices:0.9.0-SNAPSHOT")
         implementation("org.slf4j:slf4j-simple:2.0.7")
+        implementation("uk.co.caprica:vlcj:4.7.0")
       }
     }
     val desktopTest by getting

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/RecAndPlay.android.kt

@@ -27,7 +27,7 @@ actual class RecorderNative: RecorderInterface {
     }
 
   override fun start(onProgressUpdate: (position: Int?, finished: Boolean) -> Unit): String {
-    VideoPlayer.stopAll()
+    VideoPlayerHolder.stopAll()
     AudioPlayer.stop()
     val rec: MediaRecorder
     recorder = initRecorder().also { rec = it }
@@ -140,7 +140,7 @@ actual object AudioPlayer: AudioPlayerInterface {
       return null
     }
 
-    VideoPlayer.stopAll()
+    VideoPlayerHolder.stopAll()
     RecorderInterface.stopRecording?.invoke()
     val current = currentlyPlaying.value
     if (current == null || current.first != fileSource.filePath) {

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/VideoPlayer.android.kt

@@ -1,10 +1,13 @@
 package chat.simplex.common.platform
 
+import android.media.MediaMetadataRetriever
 import android.media.session.PlaybackState
 import android.net.Uri
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.ui.graphics.ImageBitmap
+import androidx.compose.ui.graphics.asImageBitmap
+import chat.simplex.common.helpers.toUri
 import chat.simplex.common.views.helpers.*
 import chat.simplex.res.MR
 import com.google.android.exoplayer2.*
@@ -17,49 +20,15 @@ import kotlinx.coroutines.*
 import java.io.File
 import java.net.URI
 
-actual class VideoPlayer private constructor(
+actual class VideoPlayer actual constructor(
-  private val uri: URI,
+  override val uri: URI,
-  private val gallery: Boolean,
+  override val gallery: Boolean,
   private val defaultPreview: ImageBitmap,
   defaultDuration: Long,
   soundEnabled: Boolean
 ): VideoPlayerInterface {
-  actual companion object {
-    private val players: MutableMap<Pair<URI, Boolean>, VideoPlayer> = mutableMapOf()
-    private val previewsAndDurations: MutableMap<URI, VideoPlayerInterface.PreviewAndDuration> = mutableMapOf()
-
-    actual fun getOrCreate(
-      uri: URI,
-      gallery: Boolean,
-      defaultPreview: ImageBitmap,
-      defaultDuration: Long,
-      soundEnabled: Boolean
-    ): VideoPlayer =
-      players.getOrPut(uri to gallery) { VideoPlayer(uri, gallery, defaultPreview, defaultDuration, soundEnabled) }
-
-    actual fun enableSound(enable: Boolean, fileName: String?, gallery: Boolean): Boolean =
-      player(fileName, gallery)?.enableSound(enable) == true
-
-    private fun player(fileName: String?, gallery: Boolean): VideoPlayer? {
-      fileName ?: return null
-      return players.values.firstOrNull { player -> player.uri.path?.endsWith(fileName) == true && player.gallery == gallery }
-    }
-
-    actual fun release(uri: URI, gallery: Boolean, remove: Boolean) =
-      player(uri.path, gallery)?.release(remove).run {  }
-
-    actual fun stopAll() {
-      players.values.forEach { it.stop() }
-    }
-
-    actual fun releaseAll() {
-      players.values.forEach { it.release(false) }
-      players.clear()
-      previewsAndDurations.clear()
-    }
-  }
-
   private val currentVolume: Float
+
   override val soundEnabled: MutableState<Boolean> = mutableStateOf(soundEnabled)
   override val brokenVideo: MutableState<Boolean> = mutableStateOf(false)
   override val videoPlaying: MutableState<Boolean> = mutableStateOf(false)
@@ -114,7 +83,7 @@ actual class VideoPlayer private constructor(
       RecorderInterface.stopRecording?.invoke()
     }
     AudioPlayer.stop()
-    stopAll()
+    VideoPlayerHolder.stopAll()
     if (listener.value == null) {
       runCatching {
         val dataSourceFactory = DefaultDataSource.Factory(androidAppContext, DefaultHttpDataSource.Factory())
@@ -224,14 +193,14 @@ actual class VideoPlayer private constructor(
   override fun release(remove: Boolean) {
     player.release()
     if (remove) {
-      players.remove(uri to gallery)
+      VideoPlayerHolder.players.remove(uri to gallery)
     }
   }
 
   private fun setPreviewAndDuration() {
     // It freezes main thread, doing it in IO thread
     CoroutineScope(Dispatchers.IO).launch {
-      val previewAndDuration = previewsAndDurations.getOrPut(uri) { getBitmapFromVideo(uri) }
+      val previewAndDuration = VideoPlayerHolder.previewsAndDurations.getOrPut(uri) { getBitmapFromVideo(uri) }
       withContext(Dispatchers.Main) {
         preview.value = previewAndDuration.preview ?: defaultPreview
         duration.value = (previewAndDuration.duration ?: 0)

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/views/chat/item/ImageFullScreenView.android.kt

@@ -51,7 +51,7 @@ actual fun FullScreenImageView(modifier: Modifier, data: ByteArray, imageBitmap:
 }
 
 @Composable
-actual fun FullScreenVideoView(player: VideoPlayer, modifier: Modifier) {
+actual fun FullScreenVideoView(player: VideoPlayer, modifier: Modifier, close: () -> Unit) {
   AndroidView(
     factory = { ctx ->
       StyledPlayerView(ctx).apply {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/model/ChatModel.kt

@@ -7,13 +7,12 @@ import androidx.compose.ui.text.SpanStyle
 import androidx.compose.ui.text.font.*
 import androidx.compose.ui.text.style.TextDecoration
 import chat.simplex.common.model.*
+import chat.simplex.common.platform.*
 import chat.simplex.common.ui.theme.*
 import chat.simplex.common.views.call.*
 import chat.simplex.common.views.chat.ComposeState
 import chat.simplex.common.views.helpers.*
 import chat.simplex.common.views.onboarding.OnboardingStage
-import chat.simplex.common.platform.AudioPlayer
-import chat.simplex.common.platform.chatController
 import chat.simplex.res.MR
 import dev.icerock.moko.resources.ImageResource
 import dev.icerock.moko.resources.StringResource
@@ -2113,6 +2112,23 @@ data class CryptoFile(
   val isAbsolutePath: Boolean
     get() = File(filePath).isAbsolute
 
+  @Transient
+  private var tmpFile: File? = null
+
+  fun createTmpFileIfNeeded(): File {
+    if (tmpFile == null) {
+      val tmpFile = File(tmpDir, UUID.randomUUID().toString())
+      tmpFile.deleteOnExit()
+      ChatModel.filesToDelete.add(tmpFile)
+      this.tmpFile = tmpFile
+    }
+    return tmpFile!!
+  }
+
+  fun deleteTmpFile() {
+    tmpFile?.delete()
+  }
+
   companion object {
     fun plain(f: String): CryptoFile = CryptoFile(f, null)
   }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/platform/VideoPlayer.kt

@@ -7,6 +7,8 @@ import java.net.URI
 interface VideoPlayerInterface {
   data class PreviewAndDuration(val preview: ImageBitmap?, val duration: Long?, val timestamp: Long)
 
+  val uri: URI
+  val gallery: Boolean
   val soundEnabled: MutableState<Boolean>
   val brokenVideo: MutableState<Boolean>
   val videoPlaying: MutableState<Boolean>
@@ -20,18 +22,45 @@ interface VideoPlayerInterface {
   fun release(remove: Boolean)
 }
 
-expect class VideoPlayer: VideoPlayerInterface {
+expect class VideoPlayer(
-  companion object {
+  uri: URI,
+  gallery: Boolean,
+  defaultPreview: ImageBitmap,
+  defaultDuration: Long,
+  soundEnabled: Boolean
+): VideoPlayerInterface
+
+object VideoPlayerHolder {
+  val players: MutableMap<Pair<URI, Boolean>, VideoPlayer> = mutableMapOf()
+  val previewsAndDurations: MutableMap<URI, VideoPlayerInterface.PreviewAndDuration> = mutableMapOf()
+
   fun getOrCreate(
     uri: URI,
     gallery: Boolean,
     defaultPreview: ImageBitmap,
     defaultDuration: Long,
     soundEnabled: Boolean
-    ): VideoPlayer
+  ): VideoPlayer =
-    fun enableSound(enable: Boolean, fileName: String?, gallery: Boolean): Boolean
+    players.getOrPut(uri to gallery) { VideoPlayer(uri, gallery, defaultPreview, defaultDuration, soundEnabled) }
-    fun release(uri: URI, gallery: Boolean, remove: Boolean)
+
-    fun stopAll()
+  fun enableSound(enable: Boolean, fileName: String?, gallery: Boolean): Boolean =
-    fun releaseAll()
+    player(fileName, gallery)?.enableSound(enable) == true
+
+  private fun player(fileName: String?, gallery: Boolean): VideoPlayer? {
+    fileName ?: return null
+    return players.values.firstOrNull { player -> player.uri.path?.endsWith(fileName) == true && player.gallery == gallery }
+  }
+
+  fun release(uri: URI, gallery: Boolean, remove: Boolean) =
+    player(uri.path, gallery)?.release(remove).run { }
+
+  fun stopAll() {
+    players.values.forEach { it.stop() }
+  }
+
+  fun releaseAll() {
+    players.values.forEach { it.release(false) }
+    players.clear()
+    previewsAndDurations.clear()
   }
 }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/ChatView.kt

@@ -737,7 +737,7 @@ fun BoxWithConstraintsScope.ChatItemsList(
   }
   DisposableEffectOnGone(
     whenGone = {
-      VideoPlayer.releaseAll()
+      VideoPlayerHolder.releaseAll()
     }
   )
   LazyColumn(Modifier.align(Alignment.BottomCenter), state = listState, reverseLayout = true) {

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/CIVIdeoView.kt

@@ -50,7 +50,7 @@ fun CIVideoView(
       })
     } else {
       Box {
-        ImageView(preview, showMenu, onClick = {
+        VideoPreviewImageView(preview, onClick = {
           if (file != null) {
             when (file.fileStatus) {
               CIFileStatus.RcvInvitation ->
@@ -75,6 +75,9 @@ fun CIVideoView(
               else -> {}
             }
           }
+        },
+          onLongClick = {
+            showMenu.value = true
           })
         if (file != null) {
           DurationProgress(file, remember { mutableStateOf(false) }, remember { mutableStateOf(duration * 1000L) }, remember { mutableStateOf(0L) }/*, soundEnabled*/)
@@ -90,7 +93,7 @@ fun CIVideoView(
 
 @Composable
 private fun VideoView(uri: URI, file: CIFile, defaultPreview: ImageBitmap, defaultDuration: Long, showMenu: MutableState<Boolean>, onClick: () -> Unit) {
-  val player = remember(uri) { VideoPlayer.getOrCreate(uri, false, defaultPreview, defaultDuration, true) }
+  val player = remember(uri) { VideoPlayerHolder.getOrCreate(uri, false, defaultPreview, defaultDuration, true) }
   val videoPlaying = remember(uri.path) { player.videoPlaying }
   val progress = remember(uri.path) { player.progress }
   val duration = remember(uri.path) { player.duration }
@@ -111,6 +114,7 @@ private fun VideoView(uri: URI, file: CIFile, defaultPreview: ImageBitmap, defau
       stop()
     }
   }
+  val onLongClick = { showMenu.value = true }
   Box {
     val windowWidth = LocalWindowWidth()
     val width = remember(preview) { if (preview.width * 0.97 <= preview.height) videoViewFullWidth(windowWidth) * 0.75f else DEFAULT_MAX_IMAGE_WIDTH }
@@ -118,12 +122,12 @@ private fun VideoView(uri: URI, file: CIFile, defaultPreview: ImageBitmap, defau
       player,
       width,
       onClick = onClick,
-      onLongClick = { showMenu.value = true },
+      onLongClick = onLongClick,
       stop
     )
     if (showPreview.value) {
-      ImageView(preview, showMenu, onClick)
+      VideoPreviewImageView(preview, onClick, onLongClick)
-      PlayButton(brokenVideo, onLongClick =  { showMenu.value = true }, play)
+      PlayButton(brokenVideo, onLongClick = onLongClick, if (appPlatform.isAndroid) play else onClick)
     }
     DurationProgress(file, videoPlaying, duration, progress/*, soundEnabled*/)
   }
@@ -201,7 +205,7 @@ private fun DurationProgress(file: CIFile, playing: MutableState<Boolean>, durat
 }
 
 @Composable
-private fun ImageView(preview: ImageBitmap, showMenu: MutableState<Boolean>, onClick: () -> Unit) {
+fun VideoPreviewImageView(preview: ImageBitmap, onClick: () -> Unit, onLongClick: () -> Unit) {
   val windowWidth = LocalWindowWidth()
   val width = remember(preview) { if (preview.width * 0.97 <= preview.height) videoViewFullWidth(windowWidth) * 0.75f else DEFAULT_MAX_IMAGE_WIDTH }
   Image(
@@ -210,10 +214,10 @@ private fun ImageView(preview: ImageBitmap, showMenu: MutableState<Boolean>, onC
     modifier = Modifier
       .width(width)
       .combinedClickable(
-        onLongClick = { showMenu.value = true },
+        onLongClick = onLongClick,
         onClick = onClick
       )
-      .onRightClick { showMenu.value = true },
+      .onRightClick(onLongClick),
     contentScale = ContentScale.FillWidth,
   )
 }

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/item/ImageFullScreenView.kt

@@ -46,9 +46,11 @@ fun ImageFullScreenView(imageProvider: () -> ImageGalleryProvider, close: () ->
   val scope = rememberCoroutineScope()
   val playersToRelease = rememberSaveable { mutableSetOf<URI>() }
   DisposableEffectOnGone(
-    whenGone = { playersToRelease.forEach { VideoPlayer.release(it, true, true) } }
+    whenGone = { playersToRelease.forEach { VideoPlayerHolder.release(it, true, true) } }
   )
-  HorizontalPager(pageCount = remember { provider.totalMediaSize }.value, state = pagerState) { index ->
+
+  @Composable
+  fun Content(index: Int) {
     Column(
       Modifier
         .fillMaxSize()
@@ -127,7 +129,7 @@ fun ImageFullScreenView(imageProvider: () -> ImageGalleryProvider, close: () ->
           FullScreenImageView(modifier, data, imageBitmap)
         } else if (media is ProviderMedia.Video) {
           val preview = remember(media.uri.path) { base64ToBitmap(media.preview) }
-          VideoView(modifier, media.uri, preview, index == settledCurrentPage)
+          VideoView(modifier, media.uri, preview, index == settledCurrentPage, close)
           DisposableEffect(Unit) {
             onDispose { playersToRelease.add(media.uri) }
           }
@@ -135,14 +137,19 @@ fun ImageFullScreenView(imageProvider: () -> ImageGalleryProvider, close: () ->
       }
     }
   }
+  if (appPlatform.isAndroid) {
+    HorizontalPager(pageCount = remember { provider.totalMediaSize }.value, state = pagerState) { index -> Content(index) }
+  } else {
+    Content(pagerState.currentPage)
+  }
 }
 
 @Composable
 expect fun FullScreenImageView(modifier: Modifier, data: ByteArray, imageBitmap: ImageBitmap)
 
 @Composable
-private fun VideoView(modifier: Modifier, uri: URI, defaultPreview: ImageBitmap, currentPage: Boolean) {
+private fun VideoView(modifier: Modifier, uri: URI, defaultPreview: ImageBitmap, currentPage: Boolean, close: () -> Unit) {
-  val player = remember(uri) { VideoPlayer.getOrCreate(uri, true, defaultPreview, 0L, true) }
+  val player = remember(uri) { VideoPlayerHolder.getOrCreate(uri, true, defaultPreview, 0L, true) }
   val isCurrentPage = rememberUpdatedState(currentPage)
   val play = {
     player.play(true)
@@ -154,13 +161,16 @@ private fun VideoView(modifier: Modifier, uri: URI, defaultPreview: ImageBitmap,
     player.enableSound(true)
     snapshotFlow { isCurrentPage.value }
       .distinctUntilChanged()
-      .collect { if (it) play() else stop() }
+      .collect {
+        // Do not autoplay on desktop because it needs workaround
+        if (it && appPlatform.isAndroid) play() else if (!it) stop()
+      }
   }
 
   Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-    FullScreenVideoView(player, modifier)
+    FullScreenVideoView(player, modifier, close)
   }
 }
 
 @Composable
-expect fun FullScreenVideoView(player: VideoPlayer, modifier: Modifier)
+expect fun FullScreenVideoView(player: VideoPlayer, modifier: Modifier, close: () -> Unit)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chatlist/ChatListView.kt

@@ -66,6 +66,8 @@ fun ChatListView(chatModel: ChatModel, settingsState: SettingsViewState, setPerf
       if (chatModel.chatId.value != null) {
         ModalManager.end.closeModalsExceptFirst()
       }
+      AudioPlayer.stop()
+      VideoPlayerHolder.stopAll()
     }
   }
   val endPadding = if (appPlatform.isDesktop) 56.dp else 0.dp

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/AppCommon.desktop.kt

@@ -29,6 +29,10 @@ fun initApp() {
   //testCrypto()
 }
 
+fun discoverVlcLibs(path: String) {
+  uk.co.caprica.vlcj.binding.LibC.INSTANCE.setenv("VLC_PLUGIN_PATH", path, 1)
+}
+
 private fun applyAppLocale() {
   val lang = ChatController.appPrefs.appLanguage.get()
   if (lang == null || lang == Locale.getDefault().language) return

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/Files.desktop.kt

@@ -21,6 +21,8 @@ actual val agentDatabaseFileName: String = "simplex_v1_agent.db"
 
 actual val databaseExportDir: File = tmpDir
 
+val vlcDir: File = File(System.getProperty("java.io.tmpdir") + File.separator + "simplex-vlc").also { it.deleteOnExit() }
+
 actual fun desktopOpenDatabaseDir() {
   if (Desktop.isDesktopSupported()) {
     try {

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/RecAndPlay.desktop.kt

@@ -1,9 +1,17 @@
 package chat.simplex.common.platform
 
 import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.mutableStateOf
 import chat.simplex.common.model.*
-import chat.simplex.common.views.usersettings.showInDevelopingAlert
+import chat.simplex.common.views.helpers.AlertManager
-import kotlinx.coroutines.CoroutineScope
+import chat.simplex.common.views.helpers.generalGetString
+import chat.simplex.res.MR
+import kotlinx.coroutines.*
+import uk.co.caprica.vlcj.player.base.MediaPlayer
+import uk.co.caprica.vlcj.player.base.State
+import uk.co.caprica.vlcj.player.component.AudioPlayerComponent
+import java.io.File
+import kotlin.math.max
 
 actual class RecorderNative: RecorderInterface {
   override fun start(onProgressUpdate: (position: Int?, finished: Boolean) -> Unit): String {
@@ -18,35 +26,186 @@ actual class RecorderNative: RecorderInterface {
 }
 
 actual object AudioPlayer: AudioPlayerInterface {
-  override fun play(fileSource: CryptoFile, audioPlaying: MutableState<Boolean>, progress: MutableState<Int>, duration: MutableState<Int>, resetOnEnd: Boolean) {
+  val player by lazy { AudioPlayerComponent().mediaPlayer() }
-    showInDevelopingAlert()
+
+  // Filepath: String, onProgressUpdate
+  private val currentlyPlaying: MutableState<Pair<CryptoFile, (position: Int?, state: TrackState) -> Unit>?> = mutableStateOf(null)
+  private var progressJob: Job? = null
+
+  enum class TrackState {
+    PLAYING, PAUSED, REPLACED
   }
 
-  override fun stop() {
+  // Returns real duration of the track
-    /*LALAL*/
+  private fun start(fileSource: CryptoFile, seek: Int? = null, onProgressUpdate: (position: Int?, state: TrackState) -> Unit): Int? {
+    val absoluteFilePath = getAppFilePath(fileSource.filePath)
+    if (!File(absoluteFilePath).exists()) {
+      Log.e(TAG, "No such file: ${fileSource.filePath}")
+      return null
     }
 
-  override fun stop(item: ChatItem) {
+    VideoPlayerHolder.stopAll()
-    /*LALAL*/
+    RecorderInterface.stopRecording?.invoke()
+    val current = currentlyPlaying.value
+    if (current == null || current.first != fileSource) {
+      stopListener()
+      player.stop()
+      runCatching {
+        if (fileSource.cryptoArgs != null) {
+          val tmpFile = fileSource.createTmpFileIfNeeded()
+          decryptCryptoFile(absoluteFilePath, fileSource.cryptoArgs, tmpFile.absolutePath)
+          player.media().prepare("file://${tmpFile.absolutePath}")
+        } else {
+          player.media().prepare("file://$absoluteFilePath")
         }
-
+      }.onFailure {
-  override fun stop(fileName: String?) {
+        Log.e(TAG, it.stackTraceToString())
-    TODO("Not yet implemented")
+        AlertManager.shared.showAlertMsg(generalGetString(MR.strings.unknown_error), it.message)
-  }
-
-  override fun pause(audioPlaying: MutableState<Boolean>, pro: MutableState<Int>) {
-    TODO("Not yet implemented")
-  }
-
-  override fun seekTo(ms: Int, pro: MutableState<Int>, filePath: String?) {
-    /*LALAL*/
-  }
-
-  override fun duration(unencryptedFilePath: String): Int? {
-    /*LALAL*/
         return null
       }
     }
+    if (seek != null) player.seekTo(seek)
+    player.start()
+    currentlyPlaying.value = fileSource to onProgressUpdate
+    progressJob = CoroutineScope(Dispatchers.Default).launch {
+      onProgressUpdate(player.currentPosition, TrackState.PLAYING)
+      while(isActive && (player.isPlaying || player.status().state() == State.OPENING)) {
+        // Even when current position is equal to duration, the player has isPlaying == true for some time,
+        // so help to make the playback stopped in UI immediately
+        if (player.currentPosition == player.duration) {
+          onProgressUpdate(player.currentPosition, TrackState.PLAYING)
+          break
+        }
+        delay(50)
+        onProgressUpdate(player.currentPosition, TrackState.PLAYING)
+      }
+      onProgressUpdate(null, TrackState.PAUSED)
+      currentlyPlaying.value?.first?.deleteTmpFile()
+    }
+    return player.duration
+  }
+
+  private fun pause(): Int {
+    progressJob?.cancel()
+    progressJob = null
+    val position = player.currentPosition
+    player.pause()
+    return position
+  }
+
+  override fun stop() {
+    if (currentlyPlaying.value == null) return
+    player.stop()
+    stopListener()
+  }
+
+  override fun stop(item: ChatItem) = stop(item.file?.fileName)
+
+  // FileName or filePath are ok
+  override fun stop(fileName: String?) {
+    if (fileName != null && currentlyPlaying.value?.first?.filePath?.endsWith(fileName) == true) {
+      stop()
+    }
+  }
+
+  private fun stopListener() {
+    val afterCoroutineCancel: CompletionHandler = {
+      // Notify prev audio listener about stop
+      currentlyPlaying.value?.second?.invoke(null, TrackState.REPLACED)
+      currentlyPlaying.value?.first?.deleteTmpFile()
+      currentlyPlaying.value = null
+    }
+    /** Preventing race by calling a code AFTER coroutine ends, so [TrackState] will be:
+     * [TrackState.PLAYING] -> [TrackState.PAUSED] -> [TrackState.REPLACED] (in this order)
+     * */
+    if (progressJob != null) {
+      progressJob?.invokeOnCompletion(afterCoroutineCancel)
+    } else {
+      afterCoroutineCancel(null)
+    }
+    progressJob?.cancel()
+    progressJob = null
+  }
+
+  override fun play(
+    fileSource: CryptoFile,
+    audioPlaying: MutableState<Boolean>,
+    progress: MutableState<Int>,
+    duration: MutableState<Int>,
+    resetOnEnd: Boolean,
+  ) {
+    if (progress.value == duration.value) {
+      progress.value = 0
+    }
+    val realDuration = start(fileSource, progress.value) { pro, state ->
+      if (pro != null) {
+        progress.value = pro
+      }
+      if (pro == null || pro == duration.value) {
+        audioPlaying.value = false
+        if (pro == duration.value) {
+          progress.value = if (resetOnEnd) 0 else duration.value
+        } else if (state == TrackState.REPLACED) {
+          progress.value = 0
+        }
+      }
+    }
+    audioPlaying.value = realDuration != null
+    // Update to real duration instead of what was received in ChatInfo
+    realDuration?.let { duration.value = it }
+  }
+
+  override fun pause(audioPlaying: MutableState<Boolean>, pro: MutableState<Int>) {
+    pro.value = pause()
+    audioPlaying.value = false
+  }
+
+  override fun seekTo(ms: Int, pro: MutableState<Int>, filePath: String?) {
+    pro.value = ms
+    if (currentlyPlaying.value?.first?.filePath == filePath) {
+      player.seekTo(ms)
+    }
+  }
+
+  override fun duration(unencryptedFilePath: String): Int? {
+    var res: Int? = null
+    try {
+      val helperPlayer = AudioPlayerComponent().mediaPlayer()
+      helperPlayer.media().startPaused("file://$unencryptedFilePath")
+      res = helperPlayer.duration
+      helperPlayer.stop()
+      helperPlayer.release()
+    } catch (e: Exception) {
+      Log.e(TAG, e.stackTraceToString())
+    }
+    return res
+  }
+}
+
+val MediaPlayer.isPlaying: Boolean
+  get() = status().isPlaying
+
+fun MediaPlayer.seekTo(time: Int) {
+  controls().setTime(time.toLong())
+}
+
+fun MediaPlayer.start() {
+  controls().start()
+}
+
+fun MediaPlayer.pause() {
+  controls().pause()
+}
+
+fun MediaPlayer.stop() {
+  controls().stop()
+}
+
+private val MediaPlayer.currentPosition: Int
+  get() = max(0, status().time().toInt())
+
+val MediaPlayer.duration: Int
+  get() = media().info().duration().toInt()
 
 actual object SoundPlayer: SoundPlayerInterface {
   override fun start(scope: CoroutineScope, sound: Boolean) { /*LALAL*/ }

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/platform/VideoPlayer.desktop.kt

@@ -3,51 +3,213 @@ package chat.simplex.common.platform
 import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.ui.graphics.ImageBitmap
-import chat.simplex.common.views.usersettings.showInDevelopingAlert
+import androidx.compose.ui.graphics.toComposeImageBitmap
+import chat.simplex.common.views.helpers.*
+import chat.simplex.res.MR
+import kotlinx.coroutines.*
+import uk.co.caprica.vlcj.player.base.MediaPlayer
+import uk.co.caprica.vlcj.player.component.CallbackMediaPlayerComponent
+import uk.co.caprica.vlcj.player.component.EmbeddedMediaPlayerComponent
+import java.awt.Component
+import java.io.File
 import java.net.URI
+import kotlin.math.max
 
-actual class VideoPlayer: VideoPlayerInterface {
+actual class VideoPlayer actual constructor(
-  actual companion object {
+  override val uri: URI,
-    actual fun getOrCreate(
+  override val gallery: Boolean,
-      uri: URI,
+  private val defaultPreview: ImageBitmap,
-      gallery: Boolean,
-      defaultPreview: ImageBitmap,
   defaultDuration: Long,
   soundEnabled: Boolean
-    ): VideoPlayer = VideoPlayer().also {
+): VideoPlayerInterface {
-      it.preview.value = defaultPreview
-      it.duration.value = defaultDuration
-      it.soundEnabled.value = soundEnabled
-    }
-    actual fun enableSound(enable: Boolean, fileName: String?, gallery: Boolean): Boolean { /*TODO*/ return false }
-    actual fun release(uri: URI, gallery: Boolean, remove: Boolean) { /*TODO*/ }
-    actual fun stopAll() { /*LALAL*/ }
-    actual fun releaseAll() { /*LALAL*/ }
-  }
-
   override val soundEnabled: MutableState<Boolean> = mutableStateOf(false)
   override val brokenVideo: MutableState<Boolean> = mutableStateOf(false)
   override val videoPlaying: MutableState<Boolean> = mutableStateOf(false)
   override val progress: MutableState<Long> = mutableStateOf(0L)
   override val duration: MutableState<Long> = mutableStateOf(0L)
-  override val preview: MutableState<ImageBitmap> = mutableStateOf(ImageBitmap(0, 0))
+  override val preview: MutableState<ImageBitmap> = mutableStateOf(defaultPreview)
+
+  val mediaPlayerComponent = initializeMediaPlayerComponent()
+  val player by lazy { mediaPlayerComponent.mediaPlayer() }
+
+  init {
+    withBGApi {
+      setPreviewAndDuration()
+    }
+  }
+
+  private val currentVolume: Int by lazy { player.audio().volume() }
+  private var isReleased: Boolean = false
+
+  private val listener: MutableState<((position: Long?, state: TrackState) -> Unit)?> = mutableStateOf(null)
+  private var progressJob: Job? = null
+
+  enum class TrackState {
+    PLAYING, PAUSED, STOPPED
+  }
+
+  private fun start(seek: Long? = null, onProgressUpdate: (position: Long?, state: TrackState) -> Unit): Boolean {
+    val filepath = getAppFilePath(uri)
+    if (filepath == null || !File(filepath).exists()) {
+      Log.e(TAG, "No such file: $uri")
+      brokenVideo.value = true
+      return false
+    }
+
+    if (soundEnabled.value)  {
+      RecorderInterface.stopRecording?.invoke()
+    }
+    AudioPlayer.stop()
+    VideoPlayerHolder.stopAll()
+    val playerFilePath = uri.toString().replaceFirst("file:", "file://")
+    if (listener.value == null) {
+      runCatching {
+        player.media().prepare(playerFilePath)
+        if (seek != null) {
+          player.seekTo(seek.toInt())
+        }
+      }.onFailure {
+        Log.e(TAG, it.stackTraceToString())
+        AlertManager.shared.showAlertMsg(generalGetString(MR.strings.unknown_error), it.message)
+        brokenVideo.value = true
+        return false
+      }
+    }
+    player.start()
+    if (seek != null) player.seekTo(seek.toInt())
+    if (!player.isPlaying) {
+      // Can happen when video file is broken
+      AlertManager.shared.showAlertMsg(generalGetString(MR.strings.unknown_error))
+      brokenVideo.value = true
+      return false
+    }
+    listener.value = onProgressUpdate
+    // Player can only be accessed in one specific thread
+    progressJob = CoroutineScope(Dispatchers.Main).launch {
+      onProgressUpdate(player.currentPosition.toLong(), TrackState.PLAYING)
+      while (isActive && !isReleased && player.isPlaying) {
+        // Even when current position is equal to duration, the player has isPlaying == true for some time,
+        // so help to make the playback stopped in UI immediately
+        if (player.currentPosition == player.duration) {
+          onProgressUpdate(player.currentPosition.toLong(), TrackState.PLAYING)
+          break
+        }
+        delay(50)
+        onProgressUpdate(player.currentPosition.toLong(), TrackState.PLAYING)
+      }
+      if (isActive && !isReleased) {
+        onProgressUpdate(player.currentPosition.toLong(), TrackState.PAUSED)
+      }
+      onProgressUpdate(null, TrackState.PAUSED)
+    }
+
+    return true
+  }
 
   override fun stop() {
-    /*TODO*/
+    if (isReleased || !videoPlaying.value) return
+    player.controls().stop()
+    stopListener()
+  }
+
+  private fun stopListener() {
+    val afterCoroutineCancel: CompletionHandler = {
+      // Notify prev video listener about stop
+      listener.value?.invoke(null, TrackState.STOPPED)
+    }
+    /** Preventing race by calling a code AFTER coroutine ends, so [TrackState] will be:
+     * [TrackState.PLAYING] -> [TrackState.PAUSED] -> [TrackState.STOPPED] (in this order)
+     * */
+    if (progressJob != null) {
+      progressJob?.invokeOnCompletion(afterCoroutineCancel)
+    } else {
+      afterCoroutineCancel(null)
+    }
+    progressJob?.cancel()
+    progressJob = null
   }
 
   override fun play(resetOnEnd: Boolean) {
-    if (appPlatform.isDesktop) {
+    if (progress.value == duration.value) {
-      showInDevelopingAlert()
+      progress.value = 0
+    }
+    videoPlaying.value = start(progress.value) { pro, _ ->
+      if (pro != null) {
+        progress.value = pro
+      }
+      if ((pro == null || pro == duration.value) && duration.value != 0L) {
+        videoPlaying.value = false
+        if (pro == duration.value) {
+          progress.value = if (resetOnEnd) 0 else duration.value
+        }/* else if (state == TrackState.STOPPED) {
+          progress.value = 0 //
+        }*/
+      }
     }
   }
 
   override fun enableSound(enable: Boolean): Boolean {
-    /*TODO*/
+    if (isReleased) return false
-    return false
+    if (soundEnabled.value == enable) return false
+    soundEnabled.value = enable
+    player.audio().setVolume(if (enable) currentVolume else 0)
+    return true
   }
 
-  override fun release(remove: Boolean) {
+  override fun release(remove: Boolean) { withApi {
-    /*TODO*/
+    if (isReleased) return@withApi
+    isReleased = true
+    // TODO
+    /** [player.release] freezes thread for some reason. It happens periodically. So doing this we don't see the freeze, but it's still there */
+    if (player.isPlaying) player.stop()
+    CoroutineScope(Dispatchers.IO).launch { player.release() }
+    if (remove) {
+      VideoPlayerHolder.players.remove(uri to gallery)
+    }
+  }}
+
+  private val MediaPlayer.currentPosition: Int
+    get() = if (isReleased) 0 else max(0, player.status().time().toInt())
+
+  private suspend fun setPreviewAndDuration() {
+    // It freezes main thread, doing it in IO thread
+    CoroutineScope(Dispatchers.IO).launch {
+      val previewAndDuration = VideoPlayerHolder.previewsAndDurations.getOrPut(uri) { getBitmapFromVideo() }
+      withContext(Dispatchers.Main) {
+        preview.value = previewAndDuration.preview ?: defaultPreview
+        duration.value = (previewAndDuration.duration ?: 0)
+      }
+    }
+  }
+
+  private suspend fun getBitmapFromVideo(): VideoPlayerInterface.PreviewAndDuration {
+    val player = CallbackMediaPlayerComponent().mediaPlayer()
+    val filepath = getAppFilePath(uri)
+    if (filepath == null || !File(filepath).exists()) {
+      return VideoPlayerInterface.PreviewAndDuration(preview = defaultPreview, timestamp = 0L, duration = 0L)
+    }
+    player.media().startPaused(filepath)
+    val start = System.currentTimeMillis()
+    while (player.snapshots()?.get() == null && start + 5000 > System.currentTimeMillis()) {
+      delay(10)
+    }
+    val preview = player.snapshots()?.get()?.toComposeImageBitmap()
+    val duration = player.duration.toLong()
+    CoroutineScope(Dispatchers.IO).launch { player.release() }
+    return VideoPlayerInterface.PreviewAndDuration(preview = preview, timestamp = 0L, duration = duration)
+  }
+
+  private fun initializeMediaPlayerComponent(): Component {
+    return if (desktopPlatform.isMac()) {
+      CallbackMediaPlayerComponent()
+    } else {
+      EmbeddedMediaPlayerComponent()
+    }
+  }
+
+  private fun Component.mediaPlayer() = when (this) {
+    is CallbackMediaPlayerComponent -> mediaPlayer()
+    is EmbeddedMediaPlayerComponent -> mediaPlayer()
+    else -> error("mediaPlayer() can only be called on vlcj player components")
   }
 }

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/chat/item/CIVideoView.desktop.kt

@@ -6,9 +6,7 @@ import androidx.compose.ui.unit.Dp
 import chat.simplex.common.platform.VideoPlayer
 
 @Composable
-actual fun PlayerView(player: VideoPlayer, width: Dp, onClick: () -> Unit, onLongClick: () -> Unit, stop: () -> Unit) {
+actual fun PlayerView(player: VideoPlayer, width: Dp, onClick: () -> Unit, onLongClick: () -> Unit, stop: () -> Unit) {}
-  /* LALAL */
-}
 
 @Composable
 actual fun LocalWindowWidth(): Dp {

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/chat/item/ImageFullScreenView.desktop.kt

@@ -1,14 +1,23 @@
 package chat.simplex.common.views.chat.item
 
-import androidx.compose.foundation.Image
+import androidx.compose.foundation.*
-import androidx.compose.runtime.Composable
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.awt.SwingPanel
 import androidx.compose.ui.graphics.*
 import androidx.compose.ui.layout.ContentScale
-import chat.simplex.common.platform.VideoPlayer
+import androidx.compose.ui.unit.dp
+import chat.simplex.common.platform.*
+import chat.simplex.common.simplexWindowState
 import chat.simplex.common.views.helpers.getBitmapFromByteArray
 import chat.simplex.res.MR
+import dev.icerock.moko.resources.compose.painterResource
 import dev.icerock.moko.resources.compose.stringResource
+import kotlinx.coroutines.delay
+import kotlin.math.max
 
 @Composable
 actual fun FullScreenImageView(modifier: Modifier, data: ByteArray, imageBitmap: ImageBitmap) {
@@ -20,6 +29,43 @@ actual fun FullScreenImageView(modifier: Modifier, data: ByteArray, imageBitmap:
   )
 }
 @Composable
-actual fun FullScreenVideoView(player: VideoPlayer, modifier: Modifier) {
+actual fun FullScreenVideoView(player: VideoPlayer, modifier: Modifier, close: () -> Unit) {
-
+  // Workaround. Without changing size of the window the screen flashes a lot even if it's not being recomposed
+  LaunchedEffect(Unit) {
+    simplexWindowState.windowState.size = simplexWindowState.windowState.size.copy(width = simplexWindowState.windowState.size.width + 1.dp)
+    delay(50)
+    player.play(true)
+    simplexWindowState.windowState.size = simplexWindowState.windowState.size.copy(width = simplexWindowState.windowState.size.width - 1.dp)
+  }
+  Box {
+    Box(Modifier.fillMaxSize().padding(bottom = 50.dp)) {
+      val factory = remember { { player.mediaPlayerComponent } }
+      SwingPanel(
+        background = Color.Transparent,
+        modifier = Modifier,
+        factory = factory
+      )
+    }
+    Controls(player, close)
+  }
+}
+
+@Composable
+private fun BoxScope.Controls(player: VideoPlayer, close: () -> Unit) {
+  val playing = remember(player) { player.videoPlaying }
+  val progress = remember(player) { player.progress }
+  val duration = remember(player) { player.duration }
+  Row(Modifier.fillMaxWidth().align(Alignment.BottomCenter).height(50.dp)) {
+    IconButton(onClick = { if (playing.value) player.player.pause() else player.play(true) },) {
+      Icon(painterResource(if (playing.value) MR.images.ic_pause_filled else MR.images.ic_play_arrow_filled), null, Modifier.size(30.dp), tint = MaterialTheme.colors.primary)
+    }
+    Slider(
+      value = progress.value.toFloat() / max(0.0001f, duration.value.toFloat()),
+      onValueChange = { player.player.seekTo((it * duration.value).toInt()) },
+      modifier = Modifier.fillMaxWidth().weight(1f)
+    )
+    IconButton(onClick = close,) {
+      Icon(painterResource(MR.images.ic_close), null, Modifier.size(30.dp), tint = MaterialTheme.colors.primary)
+    }
+  }
 }

apps/multiplatform/common/src/desktopMain/kotlin/chat/simplex/common/views/helpers/Utils.desktop.kt

@@ -133,7 +133,6 @@ actual suspend fun saveTempImageUncompressed(image: ImageBitmap, asPng: Boolean)
 }
 
 actual fun getBitmapFromVideo(uri: URI, timestamp: Long?, random: Boolean): VideoPlayerInterface.PreviewAndDuration {
-  // LALAL
   return VideoPlayerInterface.PreviewAndDuration(preview = null, timestamp = 0L, duration = 0L)
 }
 

apps/multiplatform/desktop/build.gradle.kts

@@ -1,6 +1,5 @@
 import org.jetbrains.compose.desktop.application.dsl.TargetFormat
 import org.jetbrains.kotlin.util.capitalizeDecapitalize.toLowerCaseAsciiOnly
-import java.util.*
 
 plugins {
   kotlin("multiplatform")
@@ -22,6 +21,7 @@ kotlin {
       dependencies {
         implementation(project(":common"))
         implementation(compose.desktop.currentOs)
+        implementation("net.java.dev.jna:jna:5.13.0")
       }
     }
     val jvmTest by getting
@@ -33,16 +33,23 @@ compose {
   desktop {
     application {
       // For debugging via VisualVM
-      /*jvmArgs += listOf(
+      val debugJava = false
+      if (debugJava) {
+        jvmArgs += listOf(
           "-Dcom.sun.management.jmxremote.port=8080",
           "-Dcom.sun.management.jmxremote.ssl=false",
           "-Dcom.sun.management.jmxremote.authenticate=false"
-      )*/
+        )
+      }
       mainClass = "chat.simplex.desktop.MainKt"
       nativeDistributions {
         // For debugging via VisualVM
-        //modules("jdk.zipfs", "jdk.management.agent")
+        if (debugJava) {
-        modules("jdk.zipfs")
+          modules("jdk.zipfs", "jdk.unsupported", "jdk.management.agent")
+        } else {
+          // 'jdk.unsupported' is for vlcj
+          modules("jdk.zipfs", "jdk.unsupported")
+        }
         //includeAllModules = true
         outputBaseDir.set(project.file("../release"))
         targetFormats(
@@ -145,7 +152,7 @@ tasks.named("compileJava") {
 afterEvaluate {
   tasks.create("cmakeBuildAndCopy") {
     dependsOn("cmakeBuild")
-    doLast {
+    val copyDetails = mutableMapOf<String, ArrayList<FileCopyDetails>>()
     copy {
       from("${project(":desktop").buildDir}/cmake/main/linux-amd64", "$cppPath/desktop/libs/linux-x86_64", "$cppPath/desktop/libs/linux-x86_64/deps")
       into("src/jvmMain/resources/libs/linux-x86_64")
@@ -156,6 +163,14 @@ afterEvaluate {
       includeEmptyDirs = false
       duplicatesStrategy = DuplicatesStrategy.INCLUDE
     }
+    copy {
+      val destinationDir = "src/jvmMain/resources/libs/linux-x86_64/vlc"
+      from("$cppPath/desktop/libs/linux-x86_64/deps/vlc")
+      into(destinationDir)
+      includeEmptyDirs = false
+      duplicatesStrategy = DuplicatesStrategy.INCLUDE
+      copyIfNeeded(destinationDir, copyDetails)
+    }
     copy {
       from("${project(":desktop").buildDir}/cmake/main/linux-aarch64", "$cppPath/desktop/libs/linux-aarch64", "$cppPath/desktop/libs/linux-aarch64/deps")
       into("src/jvmMain/resources/libs/linux-aarch64")
@@ -166,6 +181,14 @@ afterEvaluate {
       includeEmptyDirs = false
       duplicatesStrategy = DuplicatesStrategy.INCLUDE
     }
+    copy {
+      val destinationDir = "src/jvmMain/resources/libs/linux-aarch64/vlc"
+      from("$cppPath/desktop/libs/linux-aarch64/deps/vlc")
+      into(destinationDir)
+      includeEmptyDirs = false
+      duplicatesStrategy = DuplicatesStrategy.INCLUDE
+      copyIfNeeded(destinationDir, copyDetails)
+    }
     copy {
       from("${project(":desktop").buildDir}/cmake/main/win-amd64", "$cppPath/desktop/libs/windows-x86_64", "$cppPath/desktop/libs/windows-x86_64/deps")
       into("src/jvmMain/resources/libs/windows-x86_64")
@@ -176,6 +199,14 @@ afterEvaluate {
       includeEmptyDirs = false
       duplicatesStrategy = DuplicatesStrategy.INCLUDE
     }
+    copy {
+      val destinationDir = "src/jvmMain/resources/libs/windows-x86_64/vlc"
+      from("$cppPath/desktop/libs/windows-x86_64/deps/vlc")
+      into(destinationDir)
+      includeEmptyDirs = false
+      duplicatesStrategy = DuplicatesStrategy.INCLUDE
+      copyIfNeeded(destinationDir, copyDetails)
+    }
     copy {
       from("${project(":desktop").buildDir}/cmake/main/mac-x86_64", "$cppPath/desktop/libs/mac-x86_64", "$cppPath/desktop/libs/mac-x86_64/deps")
       into("src/jvmMain/resources/libs/mac-x86_64")
@@ -186,6 +217,14 @@ afterEvaluate {
       includeEmptyDirs = false
       duplicatesStrategy = DuplicatesStrategy.INCLUDE
     }
+    copy {
+      val destinationDir = "src/jvmMain/resources/libs/mac-x86_64/vlc"
+      from("$cppPath/desktop/libs/mac-x86_64/deps/vlc")
+      into(destinationDir)
+      includeEmptyDirs = false
+      duplicatesStrategy = DuplicatesStrategy.INCLUDE
+      copyIfNeeded(destinationDir, copyDetails)
+    }
     copy {
       from("${project(":desktop").buildDir}/cmake/main/mac-aarch64", "$cppPath/desktop/libs/mac-aarch64", "$cppPath/desktop/libs/mac-aarch64/deps")
       into("src/jvmMain/resources/libs/mac-aarch64")
@@ -196,6 +235,36 @@ afterEvaluate {
       includeEmptyDirs = false
       duplicatesStrategy = DuplicatesStrategy.INCLUDE
     }
+    copy {
+      val destinationDir = "src/jvmMain/resources/libs/mac-aarch64/vlc"
+      from("$cppPath/desktop/libs/mac-aarch64/deps/vlc")
+      into(destinationDir)
+      includeEmptyDirs = false
+      duplicatesStrategy = DuplicatesStrategy.INCLUDE
+      copyIfNeeded(destinationDir, copyDetails)
+    }
+    doLast {
+      copyDetails.forEach { (destinationDir, details) ->
+        details.forEach { detail ->
+          val target = File(projectDir.absolutePath + File.separator + destinationDir + File.separator + detail.path)
+          if (target.exists()) {
+            target.setLastModified(detail.lastModified)
           }
         }
       }
+    }
+  }
+}
+
+fun CopySpec.copyIfNeeded(destinationDir: String, into: MutableMap<String, ArrayList<FileCopyDetails>>) {
+  val details = arrayListOf<FileCopyDetails>()
+  eachFile {
+    val targetFile = File(destinationDir, path)
+    if (file.lastModified() == targetFile.lastModified() && file.length() == targetFile.length()) {
+      exclude()
+    } else {
+      details.add(this)
+    }
+  }
+  into[destinationDir] = details
+}

apps/multiplatform/desktop/src/jvmMain/kotlin/chat/simplex/desktop/Main.kt

@@ -5,6 +5,8 @@ import chat.simplex.common.showApp
 import java.io.File
 import java.nio.file.*
 import java.nio.file.attribute.BasicFileAttributes
+import java.nio.file.attribute.FileTime
+import kotlin.io.path.setLastModifiedTime
 
 fun main() {
   initHaskell()
@@ -20,6 +22,15 @@ private fun initHaskell() {
   val libsTmpDir = File(tmpDir.absolutePath + File.separator + "libs")
   copyResources(desktopPlatform.libPath, libsTmpDir.toPath())
   System.load(File(libsTmpDir, libApp).absolutePath)
+
+  vlcDir.deleteRecursively()
+  Files.move(File(libsTmpDir, "vlc").toPath(), vlcDir.toPath(), StandardCopyOption.REPLACE_EXISTING)
+  // No picture without preloading it, only sound. However, with libs from AppImage it works without preloading
+  //val libXcb = "libvlc_xcb_events.so.0.0.0"
+  //System.load(File(File(vlcDir, "vlc"), libXcb).absolutePath)
+  System.setProperty("jna.library.path", vlcDir.absolutePath)
+  //discoverVlcLibs(File(File(vlcDir, "vlc"), "plugins").absolutePath)
+
   libsTmpDir.deleteRecursively()
   initHS()
 }
@@ -34,7 +45,12 @@ private fun copyResources(from: String, to: Path) {
       return FileVisitResult.CONTINUE
     }
     override fun visitFile(file: Path, attrs: BasicFileAttributes): FileVisitResult {
-      Files.copy(file, to.resolve(resPath.relativize(file).toString()), StandardCopyOption.REPLACE_EXISTING)
+      val dest = to.resolve(resPath.relativize(file).toString())
+      Files.copy(file, dest, StandardCopyOption.REPLACE_EXISTING)
+      // Setting the same time on file as the time set in script that generates VLC libs
+      if (dest.toString().contains("." + desktopPlatform.libExtension)) {
+        dest.setLastModifiedTime(FileTime.fromMillis(0))
+      }
       return FileVisitResult.CONTINUE
     }
   })

scripts/desktop/build-lib-linux.sh

@@ -23,3 +23,4 @@ rm -rf apps/multiplatform/desktop/build/cmake
 mkdir -p apps/multiplatform/common/src/commonMain/cpp/desktop/libs/$OS-$ARCH/
 cp -r $BUILD_DIR/build/deps apps/multiplatform/common/src/commonMain/cpp/desktop/libs/$OS-$ARCH/
 cp $BUILD_DIR/build/libHSsimplex-chat-*-inplace-ghc${GHC_VERSION}.so apps/multiplatform/common/src/commonMain/cpp/desktop/libs/$OS-$ARCH/
+scripts/desktop/prepare-vlc-linux.sh

scripts/desktop/build-lib-mac.sh

@@ -95,3 +95,4 @@ rm -rf apps/multiplatform/desktop/build/cmake
 mkdir -p apps/multiplatform/common/src/commonMain/cpp/desktop/libs/$OS-$ARCH/
 cp -r $BUILD_DIR/build/deps apps/multiplatform/common/src/commonMain/cpp/desktop/libs/$OS-$ARCH/
 cp $BUILD_DIR/build/libHSsimplex-chat-*-inplace-ghc*.$LIB_EXT apps/multiplatform/common/src/commonMain/cpp/desktop/libs/$OS-$ARCH/
+scripts/desktop/prepare-vlc-mac.sh

scripts/desktop/prepare-vlc-linux.sh

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+set -e
+
+function readlink() {
+  echo "$(cd "$(dirname "$1")"; pwd -P)"
+}
+root_dir="$(dirname "$(dirname "$(readlink "$0")")")"
+vlc_dir=$root_dir/apps/multiplatform/common/src/commonMain/cpp/desktop/libs/linux-x86_64/deps/vlc
+
+mkdir $vlc_dir || exit 0
+
+
+cd /tmp
+mkdir tmp 2>/dev/null || true
+cd tmp
+curl https://github.com/cmatomic/VLCplayer-AppImage/releases/download/3.0.11.1/VLC_media_player-3.0.11.1-x86_64.AppImage -L -o appimage
+chmod +x appimage
+./appimage --appimage-extract
+cp -r squashfs-root/usr/lib/* $vlc_dir
+cd ../
+rm -rf tmp
+exit 0
+
+
+# This is currently unneeded
+cd /tmp
+(
+mkdir tmp
+cd tmp
+curl http://archive.ubuntu.com/ubuntu/pool/universe/v/vlc/libvlc5_3.0.9.2-1_amd64.deb -o libvlc
+ar p libvlc data.tar.xz > data.tar.xz
+tar -xvf data.tar.xz
+mv usr/lib/x86_64-linux-gnu/libvlc.so{.5,}
+cp usr/lib/x86_64-linux-gnu/libvlc.so* $vlc_dir
+cd ../
+rm -rf tmp
+)
+
+(
+mkdir tmp
+cd tmp
+curl http://archive.ubuntu.com/ubuntu/pool/universe/v/vlc/libvlccore9_3.0.9.2-1_amd64.deb -o libvlccore
+ar p libvlccore data.tar.xz > data.tar.xz
+tar -xvf data.tar.xz
+cp usr/lib/x86_64-linux-gnu/libvlccore.so* $vlc_dir
+cd ../
+rm -rf tmp
+)
+
+(
+mkdir tmp
+cd tmp
+curl http://mirrors.edge.kernel.org/ubuntu/pool/universe/v/vlc/vlc-plugin-base_3.0.9.2-1_amd64.deb -o plugins
+ar p plugins data.tar.xz > data.tar.xz
+tar -xvf data.tar.xz
+find usr/lib/x86_64-linux-gnu/vlc/plugins/ -name "lib*.so*" -exec patchelf --set-rpath '$ORIGIN/../../' {} \;
+cp -r usr/lib/x86_64-linux-gnu/vlc/{libvlc*,plugins} $vlc_dir
+cd ../
+rm -rf tmp
+)
+
+(
+mkdir tmp
+cd tmp
+curl http://archive.ubuntu.com/ubuntu/pool/main/libi/libidn/libidn11_1.33-2.2ubuntu2_amd64.deb -o idn
+ar p idn data.tar.xz > data.tar.xz
+tar -xvf data.tar.xz
+cp lib/x86_64-linux-gnu/lib* $vlc_dir
+cd ../
+rm -rf tmp
+)
+
+find $vlc_dir -maxdepth 1 -name "lib*.so*" -exec patchelf --set-rpath '$ORIGIN' {} \;

scripts/desktop/prepare-vlc-mac.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+
+set -e
+
+ARCH="${1:-`uname -a | rev | cut -d' ' -f1 | rev`}"
+if [ "$ARCH" == "arm64" ]; then
+    ARCH=aarch64
+    vlc_arch=arm64
+else
+    vlc_arch=intel64
+fi
+vlc_version=3.0.19
+
+function readlink() {
+  echo "$(cd "$(dirname "$1")"; pwd -P)"
+}
+
+root_dir="$(dirname "$(dirname "$(readlink "$0")")")"
+vlc_dir=$root_dir/apps/multiplatform/common/src/commonMain/cpp/desktop/libs/mac-$ARCH/deps/vlc
+#rm -rf $vlc_dir
+mkdir -p $vlc_dir/vlc || exit 0
+
+cd /tmp
+mkdir tmp 2>/dev/null || true
+cd tmp
+curl https://github.com/simplex-chat/vlc/releases/download/v$vlc_version/vlc-macos-$ARCH.zip -L -o vlc
+unzip -oqq vlc
+install_name_tool -add_rpath "@loader_path/VLC.app/Contents/MacOS/lib" vlc-cache-gen
+cd VLC.app/Contents/MacOS/lib
+for lib in $(ls *.dylib); do install_name_tool -add_rpath "@loader_path" $lib 2> /dev/null || true; done
+cd ../plugins
+for lib in $(ls *.dylib); do
+    install_name_tool -add_rpath "@loader_path/../../" $lib 2> /dev/null || true
+done
+cd ..
+../../../vlc-cache-gen plugins
+cp lib/* $vlc_dir/
+cp -r -p plugins/ $vlc_dir/vlc/plugins
+cd ../../../../
+rm -rf tmp