# 剪映导出算法流程图

## 总体流程

```mermaid
flowchart TD
    Start([开始导出]) --> Input[输入参数验证]
    Input --> GetData[获取匹配结果详情]
    GetData --> CheckData{数据是否有效?}
    CheckData -->|否| Error1[返回错误]
    CheckData -->|是| InitDraft[初始化草稿结构]
    
    InitDraft --> CalcDuration[计算总时长]
    CalcDuration --> GenMaterials[生成素材列表]
    GenMaterials --> GenTracks[生成轨道结构]
    GenTracks --> Serialize[序列化JSON]
    Serialize --> WriteFile[写入文件]
    WriteFile --> Success[返回文件路径]
    
    Error1 --> End([结束])
    Success --> End
```

## 素材生成详细流程

```mermaid
flowchart TD
    StartMat[开始生成素材] --> InitMap[初始化ID映射表]
    InitMap --> LoopStart{遍历匹配片段}
    
    LoopStart -->|有片段| QuerySegment[查询MaterialSegment]
    QuerySegment --> CheckSegment{片段是否存在?}
    CheckSegment -->|否| LogError[记录错误并跳过]
    CheckSegment -->|是| NormalizePath[标准化文件路径]
    
    NormalizePath --> GenUUID[生成随机素材ID]
    GenUUID --> MapID[建立ID映射关系]
    MapID --> CreateVideo[创建JianYingVideo对象]
    CreateVideo --> AddToList[添加到素材列表]
    
    AddToList --> LoopStart
    LogError --> LoopStart
    LoopStart -->|无片段| ReturnMaterials[返回素材列表和映射表]
```

## 轨道生成详细流程

```mermaid
flowchart TD
    StartTrack[开始生成轨道] --> CreateTrack[创建主视频轨道]
    CreateTrack --> InitSegments[初始化片段列表]
    InitSegments --> LoopSegments{遍历匹配片段}
    
    LoopSegments -->|有片段| LookupID[查找素材ID映射]
    LookupID --> CheckMapping{映射是否存在?}
    CheckMapping -->|否| SkipSegment[跳过此片段]
    CheckMapping -->|是| CreateSegment[创建JianYingSegment]
    
    CreateSegment --> SetTimeRange[设置时间轴映射]
    SetTimeRange --> SetProperties[设置播放属性]
    SetProperties --> SetEffects[设置视觉效果]
    SetEffects --> AddSegment[添加到片段列表]
    
    AddSegment --> LoopSegments
    SkipSegment --> LoopSegments
    LoopSegments -->|无片段| AssignTrack[分配轨道结构]
    AssignTrack --> ReturnTracks[返回轨道列表]
```

## 路径处理流程

```mermaid
flowchart TD
    InputPath[输入文件路径] --> CheckUNC{是否包含\\\\?\\前缀?}
    CheckUNC -->|是| RemovePrefix[移除UNC前缀]
    CheckUNC -->|否| KeepOriginal[保持原路径]
    RemovePrefix --> ValidatePath[验证路径格式]
    KeepOriginal --> ValidatePath
    ValidatePath --> ReturnPath[返回标准化路径]
```

## 时间轴映射机制

```mermaid
flowchart LR
    subgraph "模板时间轴"
        TS1[片段1: 0-5s]
        TS2[片段2: 5-10s]
        TS3[片段3: 10-15s]
    end
    
    subgraph "素材文件"
        MS1[素材A: 0-5s]
        MS2[素材B: 0-5s]
        MS3[素材C: 0-5s]
    end
    
    subgraph "剪映时间轴"
        JS1[片段1: 0-5s]
        JS2[片段2: 5-10s]
        JS3[片段3: 10-15s]
    end
    
    TS1 --> MS1
    TS2 --> MS2
    TS3 --> MS3
    
    MS1 --> JS1
    MS2 --> JS2
    MS3 --> JS3
```

## 数据转换映射

```mermaid
flowchart LR
    subgraph "输入数据"
        TMR[TemplateMatchingResult]
        MSR[MatchingSegmentResult[]]
        MS[MaterialSegment]
    end
    
    subgraph "中间处理"
        IDMap[ID映射表]
        PathNorm[路径标准化]
        TimeCalc[时长计算]
    end
    
    subgraph "输出数据"
        JDC[JianYingDraftContent]
        JV[JianYingVideo[]]
        JT[JianYingTrack[]]
        JSeg[JianYingSegment[]]
    end
    
    TMR --> TimeCalc
    MSR --> IDMap
    MS --> PathNorm
    
    IDMap --> JV
    PathNorm --> JV
    TimeCalc --> JDC
    
    JV --> JDC
    JT --> JDC
    JSeg --> JT
```

## 错误处理流程

```mermaid
flowchart TD
    Operation[执行操作] --> CheckError{是否发生错误?}
    CheckError -->|否| Continue[继续执行]
    CheckError -->|是| ErrorType{错误类型}
    
    ErrorType -->|数据不存在| LogWarning[记录警告]
    ErrorType -->|系统错误| LogError[记录错误]
    ErrorType -->|致命错误| Abort[中止执行]
    
    LogWarning --> Skip[跳过当前项]
    LogError --> Retry{是否重试?}
    Retry -->|是| Operation
    Retry -->|否| Skip
    
    Skip --> Continue
    Abort --> ReturnError[返回错误]
    Continue --> Success[操作成功]
```

## 性能优化策略

```mermaid
flowchart TD
    subgraph "数据库优化"
        BatchQuery[批量查询]
        IndexOpt[索引优化]
        ConnPool[连接池]
    end
    
    subgraph "内存优化"
        PreAlloc[预分配容量]
        ObjectPool[对象池]
        LazyLoad[延迟加载]
    end
    
    subgraph "算法优化"
        HashMap[HashMap查找]
        PathCache[路径缓存]
        ParallelProc[并行处理]
    end
    
    subgraph "I/O优化"
        AsyncIO[异步I/O]
        BufferWrite[缓冲写入]
        Compression[压缩输出]
    end
```

## 质量保证流程

```mermaid
flowchart TD
    StartQA[开始质量检查] --> ValidateInput[验证输入数据]
    ValidateInput --> CheckMaterials[检查素材完整性]
    CheckMaterials --> ValidateTime[验证时间轴]
    ValidateTime --> CheckPaths[检查文件路径]
    CheckPaths --> ValidateJSON[验证JSON格式]
    ValidateJSON --> TestImport[测试剪映导入]
    TestImport --> QAPass{质量检查通过?}
    
    QAPass -->|是| DeployReady[准备部署]
    QAPass -->|否| FixIssues[修复问题]
    FixIssues --> StartQA
```

## 监控和日志

```mermaid
flowchart LR
    subgraph "性能监控"
        ExecTime[执行时间]
        MemUsage[内存使用]
        DBQuery[数据库查询次数]
    end
    
    subgraph "业务监控"
        SuccessRate[成功率]
        ErrorCount[错误计数]
        FileSize[输出文件大小]
    end
    
    subgraph "日志记录"
        InfoLog[信息日志]
        WarnLog[警告日志]
        ErrorLog[错误日志]
    end
    
    ExecTime --> InfoLog
    MemUsage --> InfoLog
    DBQuery --> InfoLog
    SuccessRate --> InfoLog
    ErrorCount --> WarnLog
    FileSize --> InfoLog
```

## 扩展性设计

```mermaid
flowchart TD
    CurrentImpl[当前实现] --> Extensions[扩展点]
    
    Extensions --> MultiTrack[多轨道支持]
    Extensions --> Effects[特效支持]
    Extensions --> Templates[模板参数化]
    Extensions --> Formats[多格式导出]
    
    MultiTrack --> AudioTrack[音频轨道]
    MultiTrack --> SubtitleTrack[字幕轨道]
    
    Effects --> Transitions[转场效果]
    Effects --> Filters[滤镜效果]
    
    Templates --> CustomCanvas[自定义画布]
    Templates --> FrameRate[帧率设置]
    
    Formats --> FinalCut[Final Cut Pro]
    Formats --> Premiere[Adobe Premiere]
```
