535 lines
16 KiB
Swift
535 lines
16 KiB
Swift
import Foundation
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import Libmpv
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import QuartzCore
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#if os(iOS)
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import UIKit
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#elseif os(macOS)
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import Cocoa
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#endif
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protocol MpvPlayerDelegate: AnyObject {
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func onPropertyChange(name: String, value: Any?)
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func onEvent(name: String, data: [String: Any]?)
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}
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// Workaround for MoltenVK problems that cause flicker.
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// https://github.com/mpv-player/mpv/pull/13651
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class MpvMetalLayer: CAMetalLayer {
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override var drawableSize: CGSize {
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get { super.drawableSize }
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set {
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if newValue == .zero || (Int(newValue.width) > 1 && Int(newValue.height) > 1) {
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super.drawableSize = newValue
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}
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}
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}
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#if os(iOS)
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@available(iOS 16.0, *)
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override var wantsExtendedDynamicRangeContent: Bool {
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get { super.wantsExtendedDynamicRangeContent }
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set {
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if Thread.isMainThread {
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super.wantsExtendedDynamicRangeContent = newValue
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} else {
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DispatchQueue.main.sync {
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super.wantsExtendedDynamicRangeContent = newValue
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}
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}
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}
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}
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#elseif os(macOS)
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override var wantsExtendedDynamicRangeContent: Bool {
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get { super.wantsExtendedDynamicRangeContent }
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set {
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if Thread.isMainThread {
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super.wantsExtendedDynamicRangeContent = newValue
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} else {
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DispatchQueue.main.async {
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super.wantsExtendedDynamicRangeContent = newValue
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}
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}
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}
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}
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#endif
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}
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/// Safely convert a C string to Swift String with UTF-8 validation.
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/// Falls back to Latin-1 decoding if the bytes are not valid UTF-8.
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/// mpv does not guarantee UTF-8 for log messages, error strings, or
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/// system-encoded paths and Flutter codecs reject invalid UTF-8.
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func safeString(_ cstr: UnsafePointer<CChar>) -> String {
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if let string = String(validatingUTF8: cstr) {
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return string
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}
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let length = strlen(cstr)
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let buffer = UnsafeBufferPointer(
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start: UnsafeRawPointer(cstr).assumingMemoryBound(to: UInt8.self),
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count: length
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)
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return String(buffer.map { Character(Unicode.Scalar($0)) })
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}
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class MpvPlayerCoreBase: NSObject {
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weak var delegate: MpvPlayerDelegate?
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var metalLayer: MpvMetalLayer?
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var mpv: OpaquePointer?
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var isInitialized = false
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var isDisposing = false
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var isPipActive = false
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var isBackgrounded = false
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var hdrEnabled = true
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var lastSigPeak = 0.0
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/// Properties that must still flow to Dart while backgrounded (state-critical).
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private static let criticalProperties: Set<String> = ["pause", "eof-reached", "paused-for-cache"]
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let queue = DispatchQueue(label: "mpv", qos: .userInitiated)
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private let queueKey = DispatchSpecificKey<Void>()
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private var pendingCommands: [UInt64: (Result<Void, Error>) -> Void] = [:]
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private let pendingCommandsLock = NSLock()
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private var nextRequestId: UInt64 = 1
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override init() {
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super.init()
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queue.setSpecific(key: queueKey, value: ())
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}
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func configurePlatformMpvOptions() {}
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func updateEDRMode(sigPeak: Double) {}
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func setupMpv() -> Bool {
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guard let metalLayer else { return false }
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mpv = mpv_create()
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guard let mpv else {
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print("[MpvPlayerCore] Failed to create MPV context")
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return false
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}
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#if DEBUG
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checkError(mpv_request_log_messages(mpv, "info"))
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#else
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checkError(mpv_request_log_messages(mpv, "warn"))
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#endif
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var layer = metalLayer
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checkError(mpv_set_option(mpv, "wid", MPV_FORMAT_INT64, &layer))
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applySharedMpvOptions()
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configurePlatformMpvOptions()
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let initResult = mpv_initialize(mpv)
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if initResult < 0 {
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print("[MpvPlayerCore] mpv_initialize failed: \(safeString(mpv_error_string(initResult)))")
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mpv_terminate_destroy(mpv)
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self.mpv = nil
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return false
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}
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mpv_set_wakeup_callback(
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mpv,
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{ context in
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guard let context else { return }
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let core = Unmanaged<MpvPlayerCoreBase>.fromOpaque(context).takeUnretainedValue()
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core.readEvents()
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},
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UnsafeMutableRawPointer(Unmanaged.passUnretained(self).toOpaque())
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)
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mpv_observe_property(mpv, 0, "video-params/sig-peak", MPV_FORMAT_DOUBLE)
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return true
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}
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func setLogLevel(_ level: String) {
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guard let mpv else { return }
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mpv_request_log_messages(mpv, level)
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}
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func setProperty(_ name: String, value: String) {
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guard mpv != nil else { return }
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if name == "hdr-enabled" {
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let enabled = value == "yes" || value == "true" || value == "1"
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setHDREnabled(enabled)
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return
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}
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mpv_set_property_string(mpv, name, value)
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}
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func setHDREnabled(_ enabled: Bool) {
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hdrEnabled = enabled
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print("[MpvPlayerCore] HDR enabled: \(enabled)")
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if mpv != nil {
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mpv_set_property_string(mpv, "target-colorspace-hint", enabled ? "yes" : "no")
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}
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DispatchQueue.main.async {
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self.updateEDRMode(sigPeak: self.lastSigPeak)
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}
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}
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func getProperty(_ name: String) -> String? {
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guard mpv != nil else { return nil }
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let cstr = mpv_get_property_string(mpv, name)
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defer { mpv_free(cstr) }
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return cstr.map { safeString($0) }
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}
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func observeProperty(_ name: String, format: String) {
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guard mpv != nil else { return }
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let mpvFormat: mpv_format
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switch format {
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case "double":
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mpvFormat = MPV_FORMAT_DOUBLE
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case "flag":
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mpvFormat = MPV_FORMAT_FLAG
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case "node":
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mpvFormat = MPV_FORMAT_NODE
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case "string":
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mpvFormat = MPV_FORMAT_STRING
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default:
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return
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}
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mpv_observe_property(mpv, 0, name, mpvFormat)
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}
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func command(_ args: [String]) {
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guard mpv != nil, !args.isEmpty else { return }
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command(args[0], args: Array(args.dropFirst()))
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}
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func commandAsync(_ args: [String], completion: @escaping (Result<Void, Error>) -> Void) {
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guard let mpv, !args.isEmpty else {
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completion(.success(()))
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return
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}
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pendingCommandsLock.lock()
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let requestId = nextRequestId
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nextRequestId += 1
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pendingCommands[requestId] = completion
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pendingCommandsLock.unlock()
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var cargs: [UnsafeMutablePointer<CChar>?] = args.map { strdup($0) }
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cargs.append(nil)
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cargs.withUnsafeBufferPointer { buffer in
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var constPointers = buffer.map { UnsafePointer($0) }
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let result = mpv_command_async(mpv, requestId, &constPointers)
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if result < 0 {
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pendingCommandsLock.lock()
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let pending = pendingCommands.removeValue(forKey: requestId)
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pendingCommandsLock.unlock()
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guard let pending else { return }
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let error = NSError(
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domain: "mpv",
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code: Int(result),
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userInfo: [NSLocalizedDescriptionKey: safeString(mpv_error_string(result))]
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)
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DispatchQueue.main.async {
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pending(.failure(error))
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}
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}
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}
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for pointer in cargs {
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free(pointer)
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}
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}
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var isPaused: Bool {
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guard let mpv else { return true }
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var flag: Int32 = 0
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mpv_get_property(mpv, "pause", MPV_FORMAT_FLAG, &flag)
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return flag != 0
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}
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var duration: Double {
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guard let mpv else { return 0 }
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var value: Double = 0
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mpv_get_property(mpv, "duration", MPV_FORMAT_DOUBLE, &value)
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return value
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}
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var timePos: Double {
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guard let mpv else { return 0 }
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var value: Double = 0
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mpv_get_property(mpv, "time-pos", MPV_FORMAT_DOUBLE, &value)
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return value
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}
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func disposeSharedState(destroySynchronously: Bool) {
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isDisposing = true
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cancelPendingCommands()
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let mpvHandle = mpv
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mpv = nil
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let destroy = {
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if let mpvHandle {
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mpv_set_wakeup_callback(mpvHandle, nil, nil)
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mpv_terminate_destroy(mpvHandle)
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}
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}
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if destroySynchronously {
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if DispatchQueue.getSpecific(key: queueKey) != nil {
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destroy()
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} else {
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queue.sync(execute: destroy)
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}
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} else {
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queue.async(execute: destroy)
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}
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}
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func applyGpuNextOptions() {
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guard mpv != nil else { return }
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mpv_set_property_string(mpv, "gpu-api", "vulkan")
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mpv_set_property_string(mpv, "gpu-context", "moltenvk")
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mpv_set_property_string(mpv, "vo", "gpu-next")
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}
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private func applySharedMpvOptions() {
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guard let mpv else { return }
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checkError(mpv_set_option_string(mpv, "vo", "gpu-next"))
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checkError(mpv_set_option_string(mpv, "gpu-api", "vulkan"))
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checkError(mpv_set_option_string(mpv, "gpu-context", "moltenvk"))
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checkError(mpv_set_option_string(mpv, "hwdec", "videotoolbox"))
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checkError(mpv_set_option_string(mpv, "target-colorspace-hint", "yes"))
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}
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private func cancelPendingCommands() {
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pendingCommandsLock.lock()
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let pending = pendingCommands
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pendingCommands.removeAll()
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pendingCommandsLock.unlock()
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let error = NSError(
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domain: "mpv",
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code: -1,
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userInfo: [NSLocalizedDescriptionKey: "Player disposed"]
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)
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for (_, completion) in pending {
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DispatchQueue.main.async {
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completion(.failure(error))
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}
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}
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}
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private func command(_ command: String, args: [String] = []) {
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guard mpv != nil else { return }
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var cargs: [UnsafeMutablePointer<CChar>?] = ([command] + args).map { strdup($0) }
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cargs.append(nil)
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defer {
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for pointer in cargs {
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free(pointer)
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}
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}
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cargs.withUnsafeBufferPointer { buffer in
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var constPointers = buffer.map { UnsafePointer($0) }
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_ = mpv_command(mpv, &constPointers)
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}
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}
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private func readEvents() {
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queue.async { [weak self] in
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guard let self, !self.isDisposing, let mpv = self.mpv else { return }
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while true {
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let event = mpv_wait_event(mpv, 0)
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guard let event else { break }
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if event.pointee.event_id == MPV_EVENT_NONE {
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break
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}
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self.handleEvent(event.pointee)
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}
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}
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}
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private func handleEvent(_ event: mpv_event) {
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switch event.event_id {
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case MPV_EVENT_PROPERTY_CHANGE:
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guard let data = event.data else { break }
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let property = data.assumingMemoryBound(to: mpv_event_property.self).pointee
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let name = safeString(property.name)
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handlePropertyChange(name: name, property: property)
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case MPV_EVENT_COMMAND_REPLY:
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let requestId = event.reply_userdata
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pendingCommandsLock.lock()
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let completion = pendingCommands.removeValue(forKey: requestId)
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pendingCommandsLock.unlock()
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guard let completion else { break }
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if event.error < 0 {
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let error = NSError(
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domain: "mpv",
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code: Int(event.error),
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userInfo: [NSLocalizedDescriptionKey: safeString(mpv_error_string(event.error))]
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)
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DispatchQueue.main.async {
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completion(.failure(error))
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}
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} else {
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DispatchQueue.main.async {
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completion(.success(()))
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}
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}
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case MPV_EVENT_FILE_LOADED:
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DispatchQueue.main.async {
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self.delegate?.onEvent(name: "file-loaded", data: nil)
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}
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case MPV_EVENT_END_FILE:
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if let endFilePtr = event.data?.assumingMemoryBound(to: mpv_event_end_file.self) {
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let endFile = endFilePtr.pointee
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var data: [String: Any] = ["reason": Int(endFile.reason.rawValue)]
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if endFile.reason == MPV_END_FILE_REASON_ERROR {
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data["error"] = Int(endFile.error)
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data["message"] = safeString(mpv_error_string(endFile.error))
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}
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DispatchQueue.main.async {
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self.delegate?.onEvent(name: "end-file", data: data)
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}
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} else {
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DispatchQueue.main.async {
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self.delegate?.onEvent(name: "end-file", data: nil)
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}
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}
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case MPV_EVENT_SHUTDOWN:
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print("[MpvPlayerCore] MPV shutdown event")
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case MPV_EVENT_PLAYBACK_RESTART:
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DispatchQueue.main.async {
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self.delegate?.onEvent(name: "playback-restart", data: nil)
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}
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case MPV_EVENT_LOG_MESSAGE:
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if isBackgrounded { break }
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if let messagePointer = event.data?.assumingMemoryBound(to: mpv_event_log_message.self) {
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let message = messagePointer.pointee
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let prefix = message.prefix.map { safeString($0) } ?? ""
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let level = message.level.map { safeString($0) } ?? ""
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let text = message.text.map { safeString($0) } ?? ""
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DispatchQueue.main.async {
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self.delegate?.onEvent(
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name: "log-message",
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data: ["prefix": prefix, "level": level, "text": text]
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)
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}
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}
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default:
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break
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}
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}
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private func handlePropertyChange(name: String, property: mpv_event_property) {
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if isBackgrounded && !Self.criticalProperties.contains(name) { return }
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var value: Any?
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switch property.format {
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case MPV_FORMAT_DOUBLE:
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if let data = property.data {
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value = data.assumingMemoryBound(to: Double.self).pointee
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}
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case MPV_FORMAT_FLAG:
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if let data = property.data {
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value = data.assumingMemoryBound(to: Int32.self).pointee != 0
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}
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case MPV_FORMAT_NODE:
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if let data = property.data {
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let node = data.assumingMemoryBound(to: mpv_node.self).pointee
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value = convertNode(node)
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}
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case MPV_FORMAT_STRING:
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if let data = property.data {
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let cstring = data.assumingMemoryBound(to: UnsafePointer<CChar>?.self).pointee
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value = cstring.map { safeString($0) }
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}
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default:
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break
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}
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if name == "video-params/sig-peak", let sigPeak = value as? Double {
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lastSigPeak = sigPeak
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DispatchQueue.main.async {
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self.updateEDRMode(sigPeak: sigPeak)
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}
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}
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DispatchQueue.main.async {
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self.delegate?.onPropertyChange(name: name, value: value)
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}
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}
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private func convertNode(_ node: mpv_node) -> Any? {
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switch node.format {
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case MPV_FORMAT_STRING:
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return node.u.string.map { safeString($0) }
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case MPV_FORMAT_FLAG:
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return node.u.flag != 0
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case MPV_FORMAT_INT64:
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return node.u.int64
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case MPV_FORMAT_DOUBLE:
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return node.u.double_
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case MPV_FORMAT_NODE_ARRAY:
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guard let list = node.u.list?.pointee else { return nil }
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var array = [Any]()
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for index in 0..<Int(list.num) {
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if let item = convertNode(list.values[index]) {
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array.append(item)
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}
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}
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return array
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case MPV_FORMAT_NODE_MAP:
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guard let list = node.u.list?.pointee else { return nil }
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var dictionary = [String: Any]()
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for index in 0..<Int(list.num) {
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if let key = list.keys?[index].map({ safeString($0) }),
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let value = convertNode(list.values[index]) {
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dictionary[key] = value
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}
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}
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return dictionary
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default:
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return nil
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}
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}
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func checkError(_ status: CInt) {
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if status < 0 {
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print("[MpvPlayerCore] MPV error: \(safeString(mpv_error_string(status)))")
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}
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}
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}
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