Fix: Reduce getLinkPriority calls

app/src/main/java/com/lagradost/cloudstream3/ui/player/GeneratorPlayer.kt

@@ -143,7 +143,11 @@ class GeneratorPlayer : FullScreenPlayer() {
         const val STOP_ACTION = "stopcs3"
 
         private val generators = ConcurrentHashMap<String, VideoGenerator<*>>()
-        fun newInstance(generator: VideoGenerator<*>, index : Int, syncData: HashMap<String, String>? = null): Bundle {
+        fun newInstance(
+            generator: VideoGenerator<*>,
+            index: Int,
+            syncData: HashMap<String, String>? = null
+        ): Bundle {
             Log.i(TAG, "newInstance = $syncData")
             val uuid = UUID.randomUUID().toString()
             generators[uuid] = generator
@@ -178,12 +182,14 @@ class GeneratorPlayer : FullScreenPlayer() {
     private var isNextEpisode: Boolean = false // this is used to reset the watch time
 
     private var preferredAutoSelectSubtitles: String? = null // null means do nothing, "" means none
-    private val allMeta: List<ResultEpisode>? get() = viewModel.state.generatorState?.allMeta?.filterIsInstance<ResultEpisode>()?.map { episode ->
-        // Refresh all the episodes watch duration
-        getViewPos(episode.id)?.let { data ->
-            episode.copy(position = data.position, duration = data.duration)
-        } ?: episode
-    }
+    private val allMeta: List<ResultEpisode>?
+        get() = viewModel.state.generatorState?.allMeta?.filterIsInstance<ResultEpisode>()
+            ?.map { episode ->
+                // Refresh all the episodes watch duration
+                getViewPos(episode.id)?.let { data ->
+                    episode.copy(position = data.position, duration = data.duration)
+                } ?: episode
+            }
 
     private fun setSubtitles(subtitle: SubtitleData?, userInitiated: Boolean): Boolean {
         // If subtitle is changed and user initiated -> Save the language
@@ -1541,7 +1547,7 @@ class GeneratorPlayer : FullScreenPlayer() {
 
     private fun startPlayer() {
         // We don't want double load when you skip loading
-        if(isPlayerActive.get()) {
+        if (isPlayerActive.get()) {
             return
         }
 
@@ -2140,6 +2146,7 @@ class GeneratorPlayer : FullScreenPlayer() {
     fun releasePlayer() {
         player.release()
         currentSelectedSubtitles = null
+        currentSelectedLink = null
         isPlayerActive.set(false)
         binding?.overlayLoadingSkipButton?.isVisible = false
         binding?.playerLoadingOverlay?.isVisible = true
@@ -2152,19 +2159,31 @@ class GeneratorPlayer : FullScreenPlayer() {
         activity?.popCurrentPage()
     }
 
+    override fun onSaveInstanceState(outState: Bundle) {
+        outState.putInt("index", viewModel.episodeIndex)
+        super.onSaveInstanceState(outState)
+    }
+
     override fun onBindingCreated(binding: FragmentPlayerBinding, savedInstanceState: Bundle?) {
         viewModel = ViewModelProvider(this)[PlayerGeneratorViewModel::class.java]
         sync = ViewModelProvider(this)[SyncViewModel::class.java]
 
         val uuid = savedInstanceState?.getString("uuid") ?: arguments?.getString("uuid")
         val index = savedInstanceState?.getInt("index") ?: arguments?.getInt("index")
-
-        viewModel.attachGenerator(generators[uuid], index)
+        val generator = generators[uuid]
 
         unwrapBundle(savedInstanceState)
         unwrapBundle(arguments)
 
         super.onBindingCreated(binding, savedInstanceState)
+
+        // Avoid showing no links found
+        if (generator == null || index == null) {
+            exitPlayer()
+            return
+        }
+        viewModel.attachGenerator(generator, index)
+
         context?.let { ctx ->
             val settingsManager = PreferenceManager.getDefaultSharedPreferences(ctx)
             showName = settingsManager.getBoolean(ctx.getString(R.string.show_name_key), true)
@@ -2193,14 +2212,18 @@ class GeneratorPlayer : FullScreenPlayer() {
 
         preferredAutoSelectSubtitles = getAutoSelectLanguageTagIETF()
 
-        if (currentSelectedLink == null) {
+        val selectedLink = currentSelectedLink
+        if (selectedLink == null) {
             viewModel.loadLinks()
+        } else {
+            // Recreated view, so we need to recreate the
+            loadLink(selectedLink, true)
         }
 
         binding.overlayLoadingSkipButton.setOnClickListener {
             // Mark as "success" early
             viewModel.modifyState {
-                copy(loading = Resource.Success(true))
+                copy(loading = Resource.Success(Unit))
             }
         }
 
@@ -2218,11 +2241,13 @@ class GeneratorPlayer : FullScreenPlayer() {
             }
         }
 
-        observe(viewModel.currentStamps) { stamps ->
+        observe(viewModel.currentStamps) { (stamps, instance) ->
+            if (instance != viewModel.state.instance) return@observe // Outdated observe
             player.addTimeStamps(stamps)
         }
 
-        observe(viewModel.currentSubtitles) { subtitles ->
+        observe(viewModel.currentSubtitles) { (subtitles, instance) ->
+            if (instance != viewModel.state.instance) return@observe // Outdated observe
             player.setActiveSubtitles(subtitles)
 
             // If the file is downloaded then do not select auto select the subtitles
@@ -2233,7 +2258,9 @@ class GeneratorPlayer : FullScreenPlayer() {
                 autoSelectSubtitles()
             }
         }
-        observe(viewModel.loadingLinks) { loading ->
+        observe(viewModel.loadingLinks) { (loading, instance) ->
+            if (instance != viewModel.state.instance) return@observe // Outdated observe
+
             when (loading) {
                 is Resource.Loading -> {
                     releasePlayer()
@@ -2254,7 +2281,9 @@ class GeneratorPlayer : FullScreenPlayer() {
             }
         }
 
-        observe(viewModel.currentLinks) { links ->
+        observe(viewModel.currentLinks) { (links, instance) ->
+            if (instance != viewModel.state.instance) return@observe // Outdated observe
+
             val turnVisible = links.isNotEmpty() && viewModel.generator?.canSkipLoading == true
             val wasGone = binding.overlayLoadingSkipButton.isGone
 
@@ -2269,7 +2298,7 @@ class GeneratorPlayer : FullScreenPlayer() {
             }
 
             safe {
-                if (viewModel.state.links.any { link ->
+                if (!isPlayerActive.get() && viewModel.state.links.any { link ->
                         getLinkPriority(currentQualityProfile, link.first) >=
                                 QualityDataHelper.AUTO_SKIP_PRIORITY
                     }

app/src/main/java/com/lagradost/cloudstream3/ui/player/PlayerGeneratorViewModel.kt

@@ -47,8 +47,9 @@ data class VideoState(
     val subtitles: PersistentSet<SubtitleData> = persistentSetOf(),
     val links: PersistentSet<VideoLink> = persistentSetOf(),
     val stamps: PersistentList<VideoSkipStamp> = persistentListOf(),
-    val loading: Resource<Boolean?> = Resource.Loading(),
+    val loading: Resource<Unit> = Resource.Loading(),
     val generatorState: GeneratorState? = null,
+    val instance: Int,
 ) {
     /**
      * This acts as a local cache for sorted links that are not copied over by the copy constructor.
@@ -114,6 +115,11 @@ data class VideoState(
     fun set(items: Collection<VideoSkipStamp>): VideoState = copy(stamps = items.toPersistentList())
 }
 
+data class VideoLive<T>(
+    val value: T,
+    val instance: Int,
+)
+
 class PlayerGeneratorViewModel : ViewModel() {
     companion object {
         const val TAG = "PlayViewGen"
@@ -123,7 +129,7 @@ class PlayerGeneratorViewModel : ViewModel() {
     var generator: VideoGenerator<*>? = null
 
     @Volatile
-    private var episodeIndex: Int = 0
+    var episodeIndex: Int = 0
 
     /**
      * The state of the video player, only modify it by modifyState to make sure observe is called,
@@ -132,20 +138,21 @@ class PlayerGeneratorViewModel : ViewModel() {
      * This value can be used without Synchronized or locking when reading, as all fields are immutable.
      * */
     @Volatile
-    var state = VideoState()
+    var state = VideoState(instance = 0)
         private set
 
-    private val _currentLinks = MutableLiveData<Set<Pair<ExtractorLink?, ExtractorUri?>>>(setOf())
-    val currentLinks: LiveData<Set<Pair<ExtractorLink?, ExtractorUri?>>> = _currentLinks
+    private val _currentLinks =
+        MutableLiveData<VideoLive<Set<Pair<ExtractorLink?, ExtractorUri?>>>>(null)
+    val currentLinks: LiveData<VideoLive<Set<Pair<ExtractorLink?, ExtractorUri?>>>> = _currentLinks
 
-    private val _currentSubtitles = MutableLiveData<Set<SubtitleData>>(setOf())
-    val currentSubtitles: LiveData<Set<SubtitleData>> = _currentSubtitles
+    private val _currentSubtitles = MutableLiveData<VideoLive<Set<SubtitleData>>>(null)
+    val currentSubtitles: LiveData<VideoLive<Set<SubtitleData>>> = _currentSubtitles
 
-    private val _loadingLinks = MutableLiveData<Resource<Boolean?>>()
-    val loadingLinks: LiveData<Resource<Boolean?>> = _loadingLinks
+    private val _loadingLinks = MutableLiveData<VideoLive<Resource<Unit>>>()
+    val loadingLinks: LiveData<VideoLive<Resource<Unit>>> = _loadingLinks
 
-    private val _currentStamps = MutableLiveData<List<VideoSkipStamp>>(emptyList())
-    val currentStamps: LiveData<List<VideoSkipStamp>> = _currentStamps
+    private val _currentStamps = MutableLiveData<VideoLive<List<VideoSkipStamp>>>(null)
+    val currentStamps: LiveData<VideoLive<List<VideoSkipStamp>>> = _currentStamps
 
     /**
      * Modifies the `state` variable safely, and with the correct observe behavior.
@@ -158,6 +165,15 @@ class PlayerGeneratorViewModel : ViewModel() {
         val oldState = state
         state = op.invoke(oldState)
 
+        /** New instance, always push state */
+        if (state.instance != oldState.instance) {
+            _currentSubtitles.postValue(VideoLive(state.subtitles, state.instance))
+            _currentStamps.postValue(VideoLive(state.stamps, state.instance))
+            _currentLinks.postValue(VideoLive(state.links, state.instance))
+            _loadingLinks.postValue(VideoLive(state.loading, state.instance))
+            return
+        }
+
         /**
          * Only post the changed values, this makes sure we do not invoke the "observe"
          *
@@ -165,15 +181,15 @@ class PlayerGeneratorViewModel : ViewModel() {
          * to avoid comparing the entire set or list as "Persistent" classes will hold the same reference if they are unchanged.
          * */
         if (state.links !== oldState.links)
-            _currentLinks.postValue(state.links)
+            _currentLinks.postValue(VideoLive(state.links, state.instance))
         if (state.stamps !== oldState.stamps)
-            _currentStamps.postValue(state.stamps)
+            _currentStamps.postValue(VideoLive(state.stamps, state.instance))
         if (state.subtitles !== oldState.subtitles)
-            _currentSubtitles.postValue(state.subtitles)
+            _currentSubtitles.postValue(VideoLive(state.subtitles, state.instance))
 
         /** Normal equality here as it is not a collection */
         if (state.loading != oldState.loading)
-            _loadingLinks.postValue(state.loading)
+            _loadingLinks.postValue(VideoLive(state.loading, state.instance))
     }
 
     private val _currentSubtitleYear = MutableLiveData<Int?>(null)
@@ -252,13 +268,10 @@ class PlayerGeneratorViewModel : ViewModel() {
         loadLinks()
     }
 
-    fun attachGenerator(newGenerator: VideoGenerator<*>?, index: Int?) {
-        if (generator == null) {
-            generator = newGenerator
-            if (index != null) {
-                episodeIndex = index
-            }
-        }
+    fun attachGenerator(newGenerator: VideoGenerator<*>, index: Int) {
+        Log.i(TAG, "attachGenerator with generator=$newGenerator and index=$index")
+        generator = newGenerator
+        episodeIndex = index
     }
 
     /**
@@ -321,45 +334,49 @@ class PlayerGeneratorViewModel : ViewModel() {
     }
 
     fun loadLinks(sourceTypes: Set<ExtractorLinkType> = LOADTYPE_INAPP) {
-        Log.i(TAG, "loadLinks")
+        Log.i(TAG, "loadLinks with generator=$generator and index=$episodeIndex")
         currentJob?.cancel()
         val index = episodeIndex
 
-        currentJob = viewModelScope.launchSafe {
-            // Clear old data and reset the state
-            modifyState {
-                VideoState(
-                    generatorState = generator?.let { gen ->
-                        GeneratorState(
-                            meta = gen.videos.getOrNull(index),
-                            nextMeta = gen.videos.getOrNull(index + 1),
-                            id = gen.getId(index),
-                            response = (gen as? RepoLinkGenerator)?.page,
-                            index = index,
-                            allMeta = gen.videos
-                        )
-                    }
-                )
-            }
+        // Clear old data and reset the state
+        modifyState {
+            VideoState(
+                loading = Resource.Loading(),
+                generatorState = generator?.let { gen ->
+                    GeneratorState(
+                        meta = gen.videos.getOrNull(index),
+                        nextMeta = gen.videos.getOrNull(index + 1),
+                        id = gen.getId(index),
+                        response = (gen as? RepoLinkGenerator)?.page,
+                        index = index,
+                        allMeta = gen.videos
+                    )
+                },
+                instance = instance + 1
+            )
+        }
 
+        currentJob = viewModelScope.launchSafe {
             // Load more data
             val loadingState = safeApiCall {
                 generator?.generateLinks(
                     sourceTypes = sourceTypes,
                     clearCache = forceClearCache,
                     callback = { link ->
-                        modifyState {
-                            add(link)
-                        }
+                        if (isActive)
+                            modifyState {
+                                add(link)
+                            }
                     },
                     isCasting = false,
                     offset = index,
                     subtitleCallback = { link ->
-                        if (isValidSubtitle(link))
+                        if (isActive && isValidSubtitle(link))
                             modifyState {
                                 add(link)
                             }
                     })
+                Unit
             }
 
             if (!isActive) {
@@ -368,9 +385,13 @@ class PlayerGeneratorViewModel : ViewModel() {
 
             /** Only mark as success if we have not skipped loading */
             modifyState {
-                when (loading) {
-                    is Resource.Loading -> copy(loading = loadingState)
-                    else -> this
+                if (!isActive) {
+                    this
+                } else {
+                    when (loading) {
+                        is Resource.Loading -> copy(loading = loadingState)
+                        else -> this
+                    }
                 }
             }
         }