edde746
3b351d7634
Cancel leaked stream subscriptions in video player dispose and flush sample buffer layer on PiP teardown/cleanup to release video frames.
424 lines
15 KiB
Swift
424 lines
15 KiB
Swift
import UIKit
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import Flutter
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import AVKit
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/// Flutter plugin that bridges MPV player to Dart via method and event channels
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class MpvPlayerPlugin: NSObject, FlutterPlugin, FlutterStreamHandler, MpvPlayerDelegate {
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// MARK: - Properties
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private var playerCore: MpvPlayerCore?
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private var eventSink: FlutterEventSink?
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private weak var registrar: FlutterPluginRegistrar?
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private var nameToId: [String: Int] = [:]
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// PiP
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private var pipController: MpvPipController?
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private var pipChannel: FlutterMethodChannel?
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private var autoPipEnabled = false
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private var isManualPipRequest = false
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private var pipTimebaseSyncTimer: Timer?
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// MARK: - FlutterPlugin Registration
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static func register(with registrar: FlutterPluginRegistrar) {
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let methodChannel = FlutterMethodChannel(
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name: "com.plezy/mpv_player",
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binaryMessenger: registrar.messenger()
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)
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let eventChannel = FlutterEventChannel(
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name: "com.plezy/mpv_player/events",
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binaryMessenger: registrar.messenger()
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)
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let pipChannel = FlutterMethodChannel(
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name: "app.plezy/pip",
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binaryMessenger: registrar.messenger()
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)
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let instance = MpvPlayerPlugin()
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instance.registrar = registrar
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instance.pipChannel = pipChannel
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registrar.addMethodCallDelegate(instance, channel: methodChannel)
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eventChannel.setStreamHandler(instance)
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pipChannel.setMethodCallHandler(instance.handlePipCall)
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}
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// MARK: - FlutterStreamHandler
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func onListen(withArguments arguments: Any?, eventSink events: @escaping FlutterEventSink) -> FlutterError? {
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self.eventSink = events
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return nil
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}
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func onCancel(withArguments arguments: Any?) -> FlutterError? {
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self.eventSink = nil
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return nil
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}
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// MARK: - FlutterPlugin Method Handler
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func handle(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
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switch call.method {
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case "initialize":
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handleInitialize(result: result)
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case "dispose":
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handleDispose(result: result)
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case "setProperty":
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handleSetProperty(call: call, result: result)
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case "getProperty":
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handleGetProperty(call: call, result: result)
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case "observeProperty":
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handleObserveProperty(call: call, result: result)
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case "command":
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handleCommand(call: call, result: result)
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case "setVisible":
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handleSetVisible(call: call, result: result)
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case "isInitialized":
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result(playerCore?.isInitialized ?? false)
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case "updateFrame":
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handleUpdateFrame(result: result)
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case "setLogLevel":
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handleSetLogLevel(call: call, result: result)
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default:
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result(FlutterMethodNotImplemented)
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}
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}
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// MARK: - PiP
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private func ensurePipController() -> MpvPipController {
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if let existing = pipController { return existing }
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let controller = MpvPipController()
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controller.delegate = self
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pipController = controller
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return controller
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}
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private func handlePipCall(_ call: FlutterMethodCall, result: @escaping FlutterResult) {
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switch call.method {
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case "isSupported":
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result(MpvPipController.isSupported)
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case "enter":
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enterPip(manual: true, result: result)
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case "setAutoPipReady":
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if let args = call.arguments as? [String: Any], let ready = args["ready"] as? Bool {
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autoPipEnabled = ready
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if ready {
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let pip = ensurePipController()
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pip.setAutoStart(true)
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// Warm the layer so the system considers PiP possible
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if let pc = playerCore {
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pip.warmLayer(currentTime: pc.timePos, isPlaying: !pc.isPaused)
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}
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NotificationCenter.default.removeObserver(self, name: UIScene.didActivateNotification, object: nil)
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NotificationCenter.default.addObserver(self, selector: #selector(sceneDidActivate), name: UIScene.didActivateNotification, object: nil)
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} else {
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pipController?.setAutoStart(false)
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NotificationCenter.default.removeObserver(self, name: UIScene.didActivateNotification, object: nil)
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}
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}
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result(nil)
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default:
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result(FlutterMethodNotImplemented)
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}
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}
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/// Switch to PiP VO and prepare the sample buffer layer for PiP display.
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/// Returns the MpvPipController on success, nil on failure.
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@discardableResult
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private func switchToPipAndPrepare() -> MpvPipController? {
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guard let playerCore = playerCore else { return nil }
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let pip = ensurePipController()
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guard playerCore.switchToPipVO(layerPtr: pip.layerPointer) else { return nil }
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playerCore.isPipStarting = true
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pip.pushBlankFrame()
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pip.syncTimebase(currentTime: playerCore.timePos, isPlaying: !playerCore.isPaused)
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pip.invalidatePlaybackState()
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return pip
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}
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/// Manual PiP entry (button press). Auto-PiP is handled by the system via
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/// canStartPictureInPictureAutomaticallyFromInline + pipWillStart delegate.
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private func enterPip(manual: Bool, result: FlutterResult? = nil) {
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guard MpvPipController.isSupported else {
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result?(["success": false, "errorCode": "ios_version", "errorMessage": "Requires iOS 15.0+"])
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return
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}
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guard playerCore != nil else {
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result?(["success": false, "errorCode": "failed", "errorMessage": "Player not initialized"])
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return
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}
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guard let pip = switchToPipAndPrepare() else {
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result?(["success": false, "errorCode": "vo_switch_failed", "errorMessage": "Failed to switch VO"])
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return
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}
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isManualPipRequest = manual
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pip.startPip(waitForFrame: manual) { [weak self] started in
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if started {
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result?(["success": true])
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} else {
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self?.cleanupPip(notify: false)
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result?(["success": false, "errorCode": "failed", "errorMessage": "PiP failed to start"])
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}
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}
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}
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/// Unified cleanup for all PiP exit paths
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private func cleanupPip(notify: Bool, pause: Bool = false) {
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playerCore?.isPipStarting = false
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playerCore?.isPipActive = false
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isManualPipRequest = false
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stopPipTimebaseSync()
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pipController?.flushLayer()
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_ = playerCore?.switchToGpuNextVO()
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if pause { playerCore?.setProperty("pause", value: "yes") }
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if notify { pipChannel?.invokeMethod("onPipChanged", arguments: false) }
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}
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/// Scene became active — re-warm the layer so auto-PiP stays possible
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@objc private func sceneDidActivate() {
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if autoPipEnabled, let pip = pipController, let pc = playerCore, !pc.isPipActive {
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pip.warmLayer(currentTime: pc.timePos, isPlaying: !pc.isPaused)
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}
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}
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// MARK: - Timebase Sync
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private func syncPipTimebase() {
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guard let playerCore = playerCore, let pipController = pipController else { return }
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pipController.syncTimebase(
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currentTime: playerCore.timePos,
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isPlaying: !playerCore.isPaused
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)
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}
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private func startPipTimebaseSync() {
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stopPipTimebaseSync()
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pipTimebaseSyncTimer = Timer.scheduledTimer(withTimeInterval: 5.0, repeats: true) { [weak self] _ in
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self?.syncPipTimebase()
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}
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}
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private func stopPipTimebaseSync() {
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pipTimebaseSyncTimer?.invalidate()
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pipTimebaseSyncTimer = nil
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}
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// MARK: - Method Handlers
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private func handleInitialize(result: @escaping FlutterResult) {
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DispatchQueue.main.async { [weak self] in
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guard let self = self else {
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result(FlutterError(code: "ERROR", message: "Plugin deallocated", details: nil))
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return
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}
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if self.playerCore?.isInitialized == true {
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result(true)
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return
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}
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guard let window = self.findKeyWindow() else {
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result(FlutterError(code: "NO_WINDOW", message: "Could not find key window", details: nil))
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return
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}
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let core = MpvPlayerCore()
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core.delegate = self
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guard core.initialize(in: window) else {
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result(FlutterError(code: "MPV_INIT_FAILED", message: "Failed to initialize MPV", details: nil))
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return
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}
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self.playerCore = core
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core.setVisible(false)
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result(true)
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}
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}
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private func handleDispose(result: @escaping FlutterResult) {
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DispatchQueue.main.async { [weak self] in
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guard let self = self else { result(nil); return }
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self.pipController?.teardown()
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self.pipController = nil
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self.autoPipEnabled = false
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NotificationCenter.default.removeObserver(self, name: UIScene.didActivateNotification, object: nil)
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self.stopPipTimebaseSync()
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self.playerCore?.dispose()
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self.playerCore = nil
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result(nil)
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}
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}
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private func handleSetProperty(call: FlutterMethodCall, result: @escaping FlutterResult) {
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guard let args = call.arguments as? [String: Any],
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let name = args["name"] as? String,
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let value = args["value"] as? String else {
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result(FlutterError(code: "INVALID_ARGS", message: "Missing 'name' or 'value' argument", details: nil))
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return
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}
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playerCore?.setProperty(name, value: value)
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if name == "pause" {
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pipController?.invalidatePlaybackState()
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if playerCore?.isPipActive == true { syncPipTimebase() }
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}
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result(nil)
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}
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private func handleGetProperty(call: FlutterMethodCall, result: @escaping FlutterResult) {
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guard let args = call.arguments as? [String: Any],
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let name = args["name"] as? String else {
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result(FlutterError(code: "INVALID_ARGS", message: "Missing 'name' argument", details: nil))
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return
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}
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result(playerCore?.getProperty(name))
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}
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private func handleObserveProperty(call: FlutterMethodCall, result: @escaping FlutterResult) {
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guard let args = call.arguments as? [String: Any],
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let name = args["name"] as? String,
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let format = args["format"] as? String,
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let id = args["id"] as? Int else {
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result(FlutterError(code: "INVALID_ARGS", message: "Missing 'name', 'format', or 'id' argument", details: nil))
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return
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}
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nameToId[name] = id
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playerCore?.observeProperty(name, format: format)
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result(nil)
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}
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private func handleCommand(call: FlutterMethodCall, result: @escaping FlutterResult) {
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guard let args = call.arguments as? [String: Any],
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let commandArgs = args["args"] as? [String] else {
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result(FlutterError(code: "INVALID_ARGS", message: "Missing 'args' argument", details: nil))
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return
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}
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playerCore?.commandAsync(commandArgs) { commandResult in
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switch commandResult {
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case .success:
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result(nil)
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case .failure(let error):
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result(FlutterError(code: "COMMAND_FAILED", message: error.localizedDescription, details: nil))
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}
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} ?? result(nil)
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}
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private func handleSetVisible(call: FlutterMethodCall, result: @escaping FlutterResult) {
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guard let args = call.arguments as? [String: Any],
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let visible = args["visible"] as? Bool else {
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result(FlutterError(code: "INVALID_ARGS", message: "Missing 'visible' argument", details: nil))
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return
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}
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DispatchQueue.main.async { [weak self] in
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self?.playerCore?.setVisible(visible)
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if visible { self?.playerCore?.updateFrame() }
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result(nil)
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}
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}
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private func handleUpdateFrame(result: @escaping FlutterResult) {
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DispatchQueue.main.async { [weak self] in
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self?.playerCore?.updateFrame()
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result(nil)
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}
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}
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private func handleSetLogLevel(call: FlutterMethodCall, result: @escaping FlutterResult) {
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guard let args = call.arguments as? [String: Any],
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let level = args["level"] as? String else {
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result(FlutterError(code: "INVALID_ARGS", message: "Missing 'level'", details: nil))
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return
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}
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playerCore?.setLogLevel(level)
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result(nil)
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}
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// MARK: - MpvPlayerDelegate
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func onPropertyChange(name: String, value: Any?) {
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guard let eventSink = eventSink, let propId = nameToId[name] else { return }
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eventSink([propId, value as Any])
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}
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func onEvent(name: String, data: [String: Any]?) {
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guard let eventSink = eventSink else { return }
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var event: [String: Any] = ["type": "event", "name": name]
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if let data = data { event["data"] = data }
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eventSink(event)
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}
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// MARK: - Helpers
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private func findKeyWindow() -> UIWindow? {
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guard let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
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let window = windowScene.windows.first(where: { $0.isKeyWindow }) else {
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return nil
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}
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return window
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}
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}
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// MARK: - MpvPipDelegate
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extension MpvPlayerPlugin: MpvPipDelegate {
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func pipWillStart() {
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// If PiP was system-initiated (not via our enterPip), switch VO now
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guard let playerCore = playerCore, !playerCore.isPipStarting else { return }
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print("[MpvPlayerPlugin] System-initiated PiP detected, switching VO")
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if switchToPipAndPrepare() == nil {
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print("[MpvPlayerPlugin] VO switch failed for system-initiated PiP")
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pipController?.stopPip()
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}
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}
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func pipDidStart() {
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playerCore?.isPipStarting = false
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playerCore?.isPipActive = true
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pipChannel?.invokeMethod("onPipChanged", arguments: true)
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syncPipTimebase()
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startPipTimebaseSync()
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if isManualPipRequest {
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isManualPipRequest = false
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UIControl().sendAction(#selector(URLSessionTask.suspend), to: UIApplication.shared, for: nil)
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}
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}
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func pipDidStop(restored: Bool) {
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cleanupPip(notify: true, pause: !restored)
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}
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func pipDidFailToStart(error: Error?) {
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cleanupPip(notify: true)
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}
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func pipSetPlaying(_ playing: Bool) {
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playerCore?.setProperty("pause", value: playing ? "no" : "yes")
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pipController?.invalidatePlaybackState()
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syncPipTimebase()
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}
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func pipSkip(byInterval seconds: Double) {
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guard let playerCore = playerCore else { return }
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let newTime = max(0, playerCore.timePos + seconds)
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playerCore.command(["seek", String(newTime), "absolute"])
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DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) { [weak self] in
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self?.syncPipTimebase()
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self?.pipController?.invalidatePlaybackState()
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}
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}
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var isPipPlaying: Bool { !(playerCore?.isPaused ?? true) }
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var pipDuration: Double { playerCore?.duration ?? 0 }
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}
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