453 lines
17 KiB
Swift
453 lines
17 KiB
Swift
//
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// MP_PlayerManager.swift
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// MusicPlayer
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//
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// Created by Mr.Zhou on 2024/5/10.
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//
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import UIKit
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import AVFoundation
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import MediaPlayer
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import AVKit
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///播放器播放状态
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enum MP_PlayerStateType:Int {
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///未启动
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case Null = 0
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///运行中
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case Playing = 1
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///暂停中
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case Pause = 2
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}
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///播放器播放方式
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enum MP_PlayerPlayType:Int {
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///列表顺序播放
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case normal = 0
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///列表随机播放
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case random = 1
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///单曲播放（当前音乐无限循环）
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case single = 2
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}
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///播放器启动时执行事件（播放的音乐）
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typealias MP_PlayTimerStartAction = () -> Void
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///播放器运行时执行事件(当前时间值，最大时间值)
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typealias MP_PlayTimerRunAction = (_ currentTime:TimeInterval, _ duration:TimeInterval) -> Void
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///播放器结束时执行事件
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typealias MP_PlayTimerEndAction = () -> Void
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///播放器暂停时执行事件
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typealias MP_PlayTimerPauseAction = () -> Void
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///播放器继续时执行事件
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typealias MP_PlayTimerResumeAction = () -> Void
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///播放器终止时执行事件
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typealias MP_PlayTimerStopAction = () -> Void
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///播放器调整进度时执行事件
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typealias MP_PlayTimerEditEndAction = () -> Void
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///播放器缓存值执行事件
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typealias MP_PlayCacheValueAction = (_ currentValue:TimeInterval, _ duration:TimeInterval) -> Void
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///播放器
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class MP_PlayerManager:NSObject{
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///控制器单例
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static let shared = MP_PlayerManager()
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///播放器
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private var player:AVPlayer = AVPlayer()
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///load模块
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var loadPlayer:MPPositive_PlayerLoadViewModel!{
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didSet{
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if loadPlayer != nil {
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//当load模块接受到新值的时候，发出通知，提醒底部模块状态切换
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NotificationCenter.notificationKey.post(notificationName: .pup_bottom_show)
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}else {
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//用户清空了load模块，隐藏播放器
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NotificationCenter.notificationKey.post(notificationName: .player_delete_list)
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playState = .Null
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}
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}
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}
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//当前播放器状态
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private var playState:MP_PlayerStateType = .Null{
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didSet{
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//当播放器状态发生变化时，对播放器按钮状态进行切换
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NotificationCenter.notificationKey.post(notificationName: .switch_player_status, object: playState)
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}
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}
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///获取播放器播放状态
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func getPlayState() -> MP_PlayerStateType {
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return playState
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}
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///当前播放器播放方法
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private var playType:MP_PlayerPlayType = .normal{
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didSet{
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//当播放器播放方式变化后，发出通知
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NotificationCenter.notificationKey.post(notificationName: .player_type_switch)
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}
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}
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///获取播放器播放方法
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func getPlayType() -> MP_PlayerPlayType {
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return playType
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}
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/// 设置播放器播放方式
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/// - Parameter type: 新的类型
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func setPlayType(_ type:MP_PlayerPlayType) {
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playType = type
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if playType == .random {
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}
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}
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///播放器启动时执行事件记录
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private var startActionBlock:MP_PlayTimerStartAction!
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///播放器运行时执行事件记录
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var runActionBlock:MP_PlayTimerRunAction!
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///播放器缓存值闭包
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var cacheValueBlock:MP_PlayCacheValueAction!
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private override init() {
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super.init()
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// 添加观察者，监听播放结束事件
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NotificationCenter.default.addObserver(self, selector: #selector(playerDidFinishPlaying(_ :)), name: .AVPlayerItemDidPlayToEndTime, object: player.currentItem)
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NotificationCenter.notificationKey.add(observer: self, selector: #selector(userSwitchCurrentVideoAction(_ :)), notificationName: .positive_player_reload)
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}
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deinit {
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NotificationCenter.default.removeObserver(self)
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}
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/// 开始播放音乐
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/// - Parameters:
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/// - startAction: 开始播放时需要执行的事件
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/// - runAction: 播放途中需要执行的事件
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/// - endAction: 结束播放时需要执行的事件
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func play(startAction:MP_PlayTimerStartAction? = nil) {
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guard loadPlayer != nil, loadPlayer.currentVideo != nil else {
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//当两项数据皆为空时，播放器无法播放
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print("Player No Data")
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return
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}
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//检索播放器状态
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switch playState {
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case .Null://未启动
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break
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case .Playing://启动中
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player.pause()
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case .Pause://暂停中
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break
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}
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//记录事件
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if startAction != nil {
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startActionBlock = startAction
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}
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//覆盖播放器原有的playerItem
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player.replaceCurrentItem(with: loadPlayer.currentVideo.resourcePlayerItem)
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//将进度回归为0
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player.seek(to: .zero)
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//设置一个秒为刻度的时间值
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let interval:CMTime = .init(seconds: 1, preferredTimescale: .init(1))
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//为播放器添加运行时主线程每秒触发事件
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player.addPeriodicTimeObserver(forInterval: interval, queue: .main, using: { [weak self] (time) in
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guard let self = self else { return }
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//转化为当前播放进度秒值
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let currentDuration = CMTimeGetSeconds(time)
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//获取当前播放音乐资源的最大时间值
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let maxDuration = getMusicDuration()
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if maxDuration.isNaN == false {
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//判断当值进度是否超越最大时间值
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if currentDuration <= maxDuration {
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//没有，执行运行时时间
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if runActionBlock != nil {
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runActionBlock!(currentDuration, maxDuration)
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}
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}
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}
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})
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//对当前播放PlayerItem设置监听状态
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//准备状态
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loadPlayer.currentVideo?.resourcePlayerItem?.addObserver(self, forKeyPath: "status", options: [.old,.new], context: nil)
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//当前缓冲值
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loadPlayer.currentVideo?.resourcePlayerItem.addObserver(self, forKeyPath: "loadedTimeRanges", options: [.old,.new], context: nil)
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}
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//实现KVO监听
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override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
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guard let keyPath = keyPath else {
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return
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}
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//根据keyPath检索
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switch keyPath {
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case "status"://playerItem状态
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if let statuValue = change?[.newKey] as? Int, statuValue == AVPlayerItem.Status.readyToPlay.rawValue {
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//判断当前播放器是否在播放当前音乐中
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if playState != .Playing {
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//当statuVlaue值等于playerItem准备播放的值，说明已经准备好播放
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print("当前音乐-\(loadPlayer.currentVideo?.title ?? "") 已经准备好播放")
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//还未播放当前音乐，启动播放
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print("开始播放音乐-\(loadPlayer.currentVideo?.title ?? "")")
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player.play()
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playState = .Playing
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//执行开始播放闭包
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if startActionBlock != nil {
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startActionBlock!()
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}
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}
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}else {
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print("当前音乐-\(loadPlayer.currentVideo?.title ?? "") 未做好准备播放，失败原因是\(loadPlayer.currentVideo?.resourcePlayerItem.error?.localizedDescription ?? "")")
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//资源更新，重新配置一下相关内容
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loadPlayer.remakeImproveData {
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[weak self] in
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guard let self = self else {return}
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//重新播放
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play()
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}
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}
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case "loadedTimeRanges"://当前缓冲进度
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//获取当前播放Item的缓冲值组
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if let timeRanges = loadPlayer.currentVideo?.resourcePlayerItem.loadedTimeRanges.map({$0.timeRangeValue}), let first = timeRanges.first {
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//获取开始时间的秒数
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let startSeconds = first.start.seconds
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//获取缓冲区的持续时间
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let durationSeconds = first.duration.seconds
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//计算当前缓冲总时间
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let bufferedSeconds = startSeconds + durationSeconds
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//获取当前播放音乐资源的最大时间值
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let maxDuration = getMusicDuration()
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//传递缓存值
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if cacheValueBlock != nil {
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cacheValueBlock!(bufferedSeconds, maxDuration)
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}
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}
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case "playbackLikelyToKeepUp"://是否存在足够的数据开始播放
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break
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default:
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break
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}
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}
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//MARK: - 获取当前音乐总长度
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///获取音乐资源总时长
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private func getMusicDuration() -> TimeInterval {
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return CMTimeGetSeconds(player.currentItem?.duration ?? .zero)
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}
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//MARK: - 音乐播放结束
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//当前音乐播放结束时
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@objc private func playerDidFinishPlaying(_ sender:Notification) {
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//检索播放器对象
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guard playState == .Playing else {
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return
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}
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switch playType {
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case .single:
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//重播
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player.seek(to: CMTime.zero)
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player.play()
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default:
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//当前音乐播放器正在播放中，下一首
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nextEvent()
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}
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}
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//MARK: - 暂停播放
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///内部暂停播放
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private func pause() {
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//检索播放状态，是否进行中
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guard playState == .Playing else {
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//未处于播放中
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print("Player is not in playing")
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return
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}
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//暂停播放器
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player.pause()
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//切换播放器状态
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playState = .Pause
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}
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/// 暂停播放
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/// - Parameter pauseAction: 暂停时要执行的事件
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func pause(_ pauseAction:MP_PlayTimerPauseAction? = nil) {
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//检索播放状态，是否进行中
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guard playState == .Playing else {
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//未处于播放中
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print("Player is not in playing")
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return
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}
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if pauseAction != nil {
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pauseAction!()
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}
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//暂停播放器
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player.pause()
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//切换播放器状态
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playState = .Pause
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}
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//MARK: - 继续播放
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/// 继续播放
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/// - Parameter resumeAction: 继续时要执行的事件
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func resume(_ resumeAction:MP_PlayTimerResumeAction? = nil) {
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//检索播放状态，是否暂停中
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guard playState == .Pause else {
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//未处于暂停中
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print("Player is not paused")
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return
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}
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if resumeAction != nil {
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resumeAction!()
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}
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//继续播放器
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player.play()
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//切换播放器状态
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playState = .Playing
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}
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///内部继续播放
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private func resume() {
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//检索播放状态，是否暂停中
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guard playState == .Pause else {
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//未处于暂停中
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print("Player is not paused")
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return
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}
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//继续播放器
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player.play()
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//切换播放器状态
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playState = .Playing
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}
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//MARK: - 停止播放
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//停止播放
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func stop() {
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//检索播放状态，是否已启动
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guard playState != .Null else {
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//未启动
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print("Player is not started")
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return
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}
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player.pause()
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playState = .Null
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}
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//MARK: - 切歌（上一首/下一首）
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///上一首歌事件
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func previousEvent() {
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//将播放器状态调整未播放
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playState = .Null
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var nextIndex:Int = 0
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//判断当前音乐播放方式
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switch playType {
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case .random://随机，播放随机列表内容
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for (index, item) in loadPlayer.randomVideos.enumerated() {
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if item.videoId == loadPlayer.currentVideo.song.videoId {
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//找到播放音乐的索引
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nextIndex = index - 1
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}
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}
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//假如next为负数，则直接播放列表最后一首
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if nextIndex < 0 {
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//播放列表最后一首
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let last = loadPlayer.randomVideos.last
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loadPlayer.improveData(last?.videoId ?? "")
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}else {
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//查询列表对应单曲
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let song = loadPlayer.randomVideos[nextIndex]
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loadPlayer.improveData(song.videoId ?? "")
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}
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default://常规播放或者单曲播放
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for (index, item) in loadPlayer.songVideos.enumerated() {
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if item.videoId == loadPlayer.currentVideo.song.videoId {
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//找到播放音乐的索引
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nextIndex = index - 1
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}
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}
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//假如next为负数，则直接播放列表最后一首
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if nextIndex < 0 {
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//播放列表最后一首
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let last = loadPlayer.songVideos.last
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loadPlayer.improveData(last?.videoId ?? "")
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}else {
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//查询列表对应单曲
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let song = loadPlayer.songVideos[nextIndex]
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loadPlayer.improveData(song.videoId ?? "")
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}
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}
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}
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///下一首歌事件
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func nextEvent() {
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//将播放器状态调整未播放
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playState = .Null
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var nextIndex:Int = 0
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switch playType {
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case .random:
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for (index, item) in loadPlayer.randomVideos.enumerated() {
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if item.videoId == loadPlayer.currentVideo.song.videoId {
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//找到播放音乐的索引
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nextIndex = index + 1
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}
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}
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//超出播放列表数
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if nextIndex > (loadPlayer.randomVideos.count-1) {
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//播放列表第一首
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let first = loadPlayer.randomVideos.first
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loadPlayer.improveData(first?.videoId ?? "")
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}else {
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//存在下一首,获取下一首ID，并播放
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let song = loadPlayer.randomVideos[nextIndex]
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loadPlayer.improveData(song.videoId ?? "")
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}
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default:
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for (index, item) in loadPlayer.songVideos.enumerated() {
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if item.videoId == loadPlayer.currentVideo.song.videoId {
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//找到播放音乐的索引
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nextIndex = index + 1
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}
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}
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//超出播放列表数
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if nextIndex > (loadPlayer.songVideos.count-1) {
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//播放列表第一首
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let first = loadPlayer.songVideos.first
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loadPlayer.improveData(first?.videoId ?? "")
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}else {
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//存在下一首,获取下一首ID，并播放
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let song = loadPlayer.songVideos[nextIndex]
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loadPlayer.improveData(song.videoId ?? "")
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}
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}
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}
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///监听到用户切换当前音乐
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@objc private func userSwitchCurrentVideoAction(_ sender:Notification) {
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//将播放器状态调整未播放
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playState = .Null
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//暂停播放
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player.pause()
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//优先获取传递的值
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if let video = sender.object as? MPPositive_SongViewModel {
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//切歌时移除KVO监听
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video.resourcePlayerItem.removeObserver(self, forKeyPath: "status")
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video.resourcePlayerItem.removeObserver(self, forKeyPath: "loadedTimeRanges")
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// video.resourcePlayerItem.removeObserver(self, forKeyPath: "playbackLikelyToKeepUp")
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}
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if loadPlayer.currentVideo != nil {
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//开始播放
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play(startAction: startActionBlock)
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}
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}
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///播放器进度调整状态
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func setEditPorgressStatu() {
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guard playState != .Null else {
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return
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}
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//播放器进入暂停状态
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pause()
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}
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/// 调整播放器进度值，必须和 setEditPorgressStatu()搭配使用
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/// - Parameters:
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/// - progress: 要调整进度值（保证在0-1范围内，超出该方法不会响应）
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func setEditProgressEnd(_ progress:Float, endAction:MP_PlayTimerEditEndAction? = nil) {
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guard playState != .Null else {
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return
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}
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guard progress >= 0, progress <= 1 else {
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return
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}
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//根据当前进度值设置时间节点
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let timePoint:Double = Double(progress)*getMusicDuration()
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//设置对应的时间值
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let time:CMTime = .init(seconds: timePoint, preferredTimescale: CMTimeScale(NSEC_PER_SEC))
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//调整播放器时间
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player.seek(to: time)
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//恢复播放
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resume()
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if endAction != nil {
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endAction!()
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}
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}
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}
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