ichni_Official/Assets/Scripts/Manager/SongPlayer.cs

using System.Collections;
using System.Collections.Generic;
using AK.Wwise;
using Sirenix.OdinInspector;
using SLSUtilities.WwiseAssistance;
using UnityEngine;
using Event = AK.Wwise.Event;

namespace Ichni
{
    public class SongPlayer : SerializedMonoBehaviour
    {
        public bool isLoading = true;
        public bool isStarting = false;
        public bool isDelaying = false;
        public bool isPlaying = false; // 是否正在播放音乐
        public bool isPausing = false; // 是否正在暂停音乐
        public bool isFinished = false;
        public bool isUpdating => isStarting || isDelaying || isPlaying;
        
        public Event PlayMusicEvent; // 播放背景音乐的事件
        public Event ResumeMusicEvent; // 恢复播放背景音乐的事件
        public Event PauseMusicEvent; // 暂停播放背景音乐的事件
        public Event StopMusicEvent; // 停止播放背景音乐的事件

        public RTPC HighPassFilter;
        public RTPC LowPassFilter;
        
        private uint _playingId;
        public float songTimeSegment = 0;
        public float pauseTimeSegment;
        private float duration;
        private float recordedSongSeg;

        public float judgeOffset = 0;
        
        private void Start()
        {
            InformationTransistor.instance.chapterSwitch.SetValue(gameObject);
            InformationTransistor.instance.songSwitch.SetValue(gameObject);
            isLoading = true;
            isStarting = false;
            
        }
        
        private void Update()
        {
            if (isLoading)
            {
                return;
            }
            
            if (isDelaying)
            {
                songTimeSegment += Time.deltaTime;
                //songTimeSegment = Mathf.Max(songTimeSegment, 0); // 确保时间段不为负数

                if (songTimeSegment >= 0)
                {
                    isDelaying = false;
                    songTimeSegment = 0; // 延迟结束后，时间段归零
                    PlaySong();
                }
            }
            else
            {
                if (GameManager.Instance.isDebugging)
                {
                    return;
                }

                if (isFinished)
                {
                    songTimeSegment = recordedSongSeg;
                    
                    return;
                }
                
                if (isPlaying)
                {
                    // 获取底层 Wwise 的当前正确时间
                    float currentSongSegment = PlaySegment() / 1000f - (judgeOffset / 1000f);

                    // 1. 让游戏时间先基于引擎渲染帧线性平滑推进
                    songTimeSegment += Time.deltaTime * Time.timeScale; 

                    // 2. 计算当前平滑时间与底层实际音频时间的误差
                    float difference = currentSongSegment - songTimeSegment;

                    // 3. 时间校准逻辑
                    // 如果偏差非常大（例如超过 50ms），说明游戏发生过卡顿停顿，强行同步消除误差
                    if (Mathf.Abs(difference) > 0.05f) 
                    {
                        songTimeSegment = currentSongSegment;
                    }
                    else
                    {
                        // 如果在正常范围内，使用微调去柔和追击这个误差，避免肉眼看到跳变（Jitter）
                        songTimeSegment += difference * 0.1f; 
                    }

                    // 保证时间不要神奇地倒退影响铺面逻辑
                    if (songTimeSegment > recordedSongSeg)
                    {
                        recordedSongSeg = songTimeSegment;
                    }
                }
                else if (isPausing)
                {
                    songTimeSegment = pauseTimeSegment;
                }
            }
        }
        

        [Button]
        public void PlaySong()
        {
            _playingId = PlayMusicEvent.Post(gameObject,
                (uint)AkCallbackType.AK_EnableGetMusicPlayPosition | 
                (uint)AkCallbackType.AK_MusicSyncEntry |
                (uint)AkCallbackType.AK_MusicSyncExit,
                OnMusicEvent, null);

            isPlaying = true;
            isPausing = false;
            isFinished = false;
        }

        [Button]
        public void PauseSong()
        {
            pauseTimeSegment = songTimeSegment;
            isPlaying = false;
            isPausing = true;
            PauseMusicEvent.Post(gameObject);
            Time.timeScale = 0;
        }

        [Button]
        public void ResumeSong()
        {
            Time.timeScale = 1;
            isPlaying = true;
            isPausing = false;
            ResumeMusicEvent.Post(gameObject);
        }
        
        [Button]
        public void StopSong()
        {
            isPlaying = false;
            isPausing = false;
            StopMusicEvent.Post(gameObject);
        }

        private void OnMusicEvent(object in_cookie, AkCallbackType in_type, AkCallbackInfo in_info)
        {
            Debug.Log(in_type + " " + in_info);
            
            if (in_type == AkCallbackType.AK_MusicSyncEntry)
            {
                if (in_info is AkMusicSyncCallbackInfo musicInfo)
                {
                    GameManager.Instance.songInformation.songLength = musicInfo.segmentInfo_iActiveDuration / 1000f;
                    InformationTransistor.instance.songLength = musicInfo.segmentInfo_iActiveDuration / 1000f;
                    InformationTransistor.instance.bpm = GameManager.Instance.songInformation.bpm;
                }
            }

            if (in_type == AkCallbackType.AK_MusicSyncExit)
            {
                isFinished = true;
                GameManager.Instance.summaryPageCanvas.SetUpSummary();
                GameManager.Instance.summaryPageCanvas.FadeIn();
            }
        }

        int PlaySegment()
        {
            AkSegmentInfo segmentInfo = new AkSegmentInfo();
            AkUnitySoundEngine.GetPlayingSegmentInfo(_playingId, segmentInfo,true);
            
            return segmentInfo.iCurrentPosition;
        }
    }
}