feat: 支持移除重复弹幕

Author: yichengchen

BilibiliLive/Component/Settings.swift

@@ -110,6 +110,9 @@ enum Settings {
 
     @UserDefault("Settings.danmuFilter", defaultValue: false)
     static var enableDanmuFilter: Bool
+
+    @UserDefault("Settings.danmuRemoveDup", defaultValue: false)
+    static var enableDanmuRemoveDup: Bool
 }
 
 struct MediaQuality {

BilibiliLive/Component/Video/NewVideoPlayerViewModel.swift

@@ -28,7 +28,8 @@ class VideoPlayerViewModel {
     var nextProvider: VideoNextProvider?
 
     private var playInfo: PlayInfo
-    private let danmuProvider = VideoDanmuProvider()
+    private let danmuProvider = VideoDanmuProvider(enableDanmuFilter: Settings.enableDanmuFilter,
+                                                   enableDanmuRemoveDup: Settings.enableDanmuRemoveDup)
     private var videoDetail: VideoDetail?
     private var cancellable = Set<AnyCancellable>()
     private var playPlugin: CommonPlayerPlugin?

BilibiliLive/Component/Video/VideoDanmuProvider.swift

@@ -37,7 +37,9 @@ struct Danmu: Codable {
 }
 
 class VideoDanmuProvider: DanmuProviderProtocol {
-    var cid: Int!
+    private var cid: Int!
+    private let enableDanmuFilter: Bool
+    private let enableDanmuRemoveDup: Bool
     private var allDanmus = [Danmu]()
     private var playingDanmus = [Danmu]()
 
@@ -59,6 +61,11 @@ class VideoDanmuProvider: DanmuProviderProtocol {
     private let segmentDuration = 60 * 6
     private func getSegmentIdx(time: TimeInterval) -> Int { Int(time) / segmentDuration + 1 }
 
+    init(enableDanmuFilter: Bool, enableDanmuRemoveDup: Bool) {
+        self.enableDanmuFilter = enableDanmuFilter
+        self.enableDanmuRemoveDup = enableDanmuRemoveDup
+    }
+
     func initVideo(cid id: Int, startPos: Int) async {
         cid = id
         upDanmus.removeAll()
@@ -108,7 +115,12 @@ class VideoDanmuProvider: DanmuProviderProtocol {
         var dms = reply.elems
             .filter { $0.mode <= 5 }
 
-        if Settings.enableDanmuFilter {
+        if enableDanmuRemoveDup {
+            var set = Set<String>()
+            dms = dms.filter { set.insert($0.content).inserted }
+        }
+
+        if enableDanmuFilter {
             dms = dms.filter {
                 VideoDanmuFilter.shared.accept($0.content)
             }

BilibiliLive/Module/Live/LiveDanMuProvider.swift

@@ -13,15 +13,19 @@ import SwiftyJSON
 
 class LiveDanMuProvider: DanmuProviderProtocol {
     let observerPlayerTime = false
+    let enableDanmuRemoveDup: Bool
     var onSendTextModel = PassthroughSubject<DanmakuTextCellModel, Never>()
 
     private var websocket: WebSocketRequest?
     private var heartBeatTimer: Timer?
     private let roomID: Int
     private var token = ""
+    private var danmuSet = Set<String>()
+    private var danmuSetClearTimer: Timer?
 
-    init(roomID: Int) {
+    init(roomID: Int, removeDup: Bool) {
         self.roomID = roomID
+        enableDanmuRemoveDup = removeDup
     }
 
     deinit {
@@ -31,6 +35,7 @@ class LiveDanMuProvider: DanmuProviderProtocol {
     func playerTimeChange(time: TimeInterval) {}
 
     func start() async throws {
+        stop()
         let info = try await WebRequest.requestDanmuServerInfo(roomID: roomID)
         guard let server = info.host_list.first else {
             Logger.info("Get room server info Fail")
@@ -45,11 +50,20 @@ class LiveDanMuProvider: DanmuProviderProtocol {
         websocket = AF.webSocketRequest(to: "wss://\(server.host):\(server.wss_port)/sub", headers: afheaders).streamMessageEvents { [weak self] event in
             self?.handleWebsocketEvent(event: event)
         }
+
+        if enableDanmuRemoveDup {
+            danmuSetClearTimer = Timer.scheduledTimer(withTimeInterval: 60, repeats: true) {
+                [weak self] _ in
+                self?.danmuSet.removeAll(keepingCapacity: true)
+            }
+        }
     }
 
     func stop() {
         websocket?.close(sending: .normalClosure)
         heartBeatTimer?.invalidate()
+        danmuSet.removeAll()
+        danmuSetClearTimer?.invalidate()
     }
 
     private func setupHeartBeat() {
@@ -122,35 +136,38 @@ extension LiveDanMuProvider {
                 case "DANMU_MSG":
                     if let str = json["info"][1].string {
                         let model = DanmakuTextCellModel(str: str)
-                        onSendTextModel.send(model)
+                        sentDanmuModel(model)
                     }
                 case "DM_INTERACTION":
                     guard let data = json["data"]["data"].string else { return }
                     let comboArr = JSON(parseJSON: data)["combo"]
                     for combo in comboArr.arrayValue {
                         if let str = combo["content"].string {
                             let model = DanmakuTextCellModel(str: str)
-                            onSendTextModel.send(model)
+                            sentDanmuModel(model)
                         }
                     }
                 case "SUPER_CHAT_MESSAGE":
                     if let str = json["data"]["message"].string {
                         let model = DanmakuTextCellModel(str: str)
                         model.type = .top
                         model.displayTime = 60
+                        sentDanmuModel(model)
                     }
                 default:
                     break
                 }
             }
     }
 
-    private func getDanMu(data: [JSON]) -> [String] {
-        return data.filter {
-            $0["cmd"].stringValue == "DANMU_MSG"
-        }.compactMap { json in
-            json["info"][1].string
+    private func sentDanmuModel(_ model: DanmakuTextCellModel) {
+        if enableDanmuRemoveDup {
+            if danmuSet.contains(model.text) {
+                return
+            }
+            danmuSet.insert(model.text)
         }
+        onSendTextModel.send(model)
     }
 }
 

BilibiliLive/Module/Live/LivePlayerViewModel.swift

@@ -167,7 +167,7 @@ class LivePlayerViewModel {
     }
 
     @MainActor private func initDanmu() async -> [CommonPlayerPlugin] {
-        danMuProvider = LiveDanMuProvider(roomID: roomID)
+        danMuProvider = LiveDanMuProvider(roomID: roomID, removeDup: Settings.enableDanmuRemoveDup)
         let danmuPlugin = DanmuViewPlugin(provider: danMuProvider!)
 
         try? await danMuProvider?.start()

BilibiliLive/Module/Personal/SettingsViewController.swift

@@ -186,6 +186,7 @@ class SettingsViewController: UIViewController {
                         }
                     }
                 }
+                Toggle(title: "移除重复弹幕", setting: Settings.enableDanmuRemoveDup, onChange: Settings.enableDanmuRemoveDup.toggle())
                 Actions(title: "弹幕大小", message: "默认为36", current: Settings.danmuSize.title, options: DanmuSize.allCases, optionString: DanmuSize.allCases.map({ $0.title })) {
                     Settings.danmuSize = $0
                 }