BFRecordScreenKit/BFRecordScreenKit/Classes/BFRecordExport.swift

//
//  BFRecordExport.swift
//  BFRecordScreenKit
//
//  Created by 胡志强 on 2021/11/25.
//  录屏视频导出

import AVFoundation
import BFCommonKit
import BFMediaKit
import Foundation
import GPUImage
import Photos

public class BFRecordExport {
    public var progress: ((Float) -> Void)?
    public var exportCompletion: ((Error?, URL?) -> Void)?

    public var data: [BFRecordItemModel]? {
        didSet {
            if data?.count ?? 0 > 0 {
                for item in data! {
                    item.generationTimeRanges()
                }
            }
        }
    }

    var count = 0

    var stickerRanges = [CMTimeRange]()

    var exporter: PQCompositionExporter?
//    var mStickers = [PQEditVisionTrackMaterialsModel]()

    deinit {}

    public init() {}

    // MARK: -

    /// synthesisAll: 合成所有还是只合成录音部分
    public func startExprot(synthesisAll: Bool) {
        // 1,背景视频素材
        if let itemModels = data {
            var totalDur = 0.0

            // 切割视频素材
            for (_, itemModel) in itemModels.enumerated() {
                itemModel.videoStickers.removeAll()
//                let dur = itemModel.materialDuraion
                if synthesisAll {
                    // 保留全部
//                    let dur = itemModel.materialDuraion
//                    let bgMovieInfo = splitBaseMaterial(timelineIn: totalDur, model_in: 0, duration: dur)
//                    bgMovieInfo.volumeGain = 0
//                    itemModel.videoStickers.append(bgMovieInfo)
//                    totalDur += dur
                    var subDur = 0.0
                    let drangs = itemModel.dealedDurationRanges
                    for srange in drangs {
                        let range = srange.range
                        let sticker = splitBaseMaterial(timelineIn: totalDur + subDur, model_in: range.start.seconds, duration: range.duration.seconds)
                        sticker.volumeGain = srange.isRecord ? 0 : 100
                        itemModel.videoStickers.append(sticker)
                        subDur += range.duration.seconds
                    }
                    totalDur += subDur
                } else {
                    var subDur = 0.0
                    var drangs = itemModel.dealedDurationRanges.filter { srange in
                        srange.isRecord == true
                    }

                    // 是否按录音顺序排列
                    let needSort = false
                    if needSort {
                        drangs.sort { range1, range2 in
                            range1.index < range2.index
                        }
                    }
                    for srange in drangs {
                        let range = srange.range
                        let sticker = splitBaseMaterial(timelineIn: totalDur + subDur, model_in: range.start.seconds, duration: range.duration.seconds)
                        sticker.volumeGain = 0
                        itemModel.videoStickers.append(sticker)
                        subDur += range.duration.seconds
                    }
                    totalDur += subDur
                }
            }
            beginExport(synthesisAll: synthesisAll)
        }
    }

    public func cancelExport() {
        exporter?.cancel()
    }

    public func clearFileCache() {
        data?.forEach { itemModel in
            itemModel.voiceStickers.forEach { model in
                if let localPath = model.wavFilePath {
                    try? FileManager.default.removeItem(atPath: localPath)
                }
            }
        }
    }

    enum DispatchError: Error {
        case timeout
    }

    func getOutputFilePath() -> URL {
        var outPutMP4Path = exportVideosDirectory
        if !directoryIsExists(dicPath: outPutMP4Path) {
            createDirectory(path: outPutMP4Path)
        }
        outPutMP4Path.append("video_\(String.qe.timestamp()).mp4")
        return URL(fileURLWithPath: outPutMP4Path)
    }

    func splitBaseMaterial(timelineIn: Double, model_in: Double, duration: Double) -> PQEditVisionTrackMaterialsModel {
        let bgMovieInfo: PQEditVisionTrackMaterialsModel = PQEditVisionTrackMaterialsModel()
        bgMovieInfo.type = StickerType.VIDEO.rawValue
        bgMovieInfo.timelineIn = timelineIn
        bgMovieInfo.timelineOut = timelineIn + duration
        bgMovieInfo.model_in = model_in
        bgMovieInfo.out = model_in + duration
        bgMovieInfo.canvasFillType = stickerContentMode.aspectFitStr.rawValue
        bgMovieInfo.volumeGain = 1
        bgMovieInfo.aptDuration = bgMovieInfo.timelineOut
        bgMovieInfo.duration = bgMovieInfo.timelineOut
        if let localPath = data?.first?.localPath {
            bgMovieInfo.locationPath = localPath
        }
        BFLog(1, message: "hhh- timIn:\(timelineIn), modIn:\(model_in), dur:\(duration)")

        return bgMovieInfo
    }

    func beginExport(synthesisAll: Bool) {
        // 输出视频地址
//        exprotVideo()
//        return;
        var outPutMP4Path = exportVideosDirectory
        if !directoryIsExists(dicPath: outPutMP4Path) {
            createDirectory(path: outPutMP4Path)
        }
        outPutMP4Path.append("video_\(String.qe.timestamp()).mp4")
        let outPutMP4URL = URL(fileURLWithPath: outPutMP4Path)
        BFLog(1, message: "导出视频地址 \(outPutMP4URL)")

        guard let itemData = data else {
            let error = NSError(domain: "err", code: -1, userInfo: ["msg": "voiceStickers count += nil"])
            exportCompletion?(error as Error, nil)
            return
        }

        // 处理导出
        var voiceList = [PQVoiceModel]()
        var videoStickers = [PQEditVisionTrackMaterialsModel]()
        var titleStickers = [PQEditSubTitleModel]()
        for itemModel in itemData {
            voiceList.append(contentsOf: itemModel.voiceStickers)
            videoStickers.append(contentsOf: itemModel.videoStickers)
            titleStickers.append(contentsOf: itemModel.titleStickers)
        }

        guard let voiceCount = data?.reduce(0, { partialResult, itemModell in
            itemModell.voiceStickers.count + partialResult
        }) else {
            BFLog(1, message: "voiceStickers count += nil")
            let error = NSError(domain: "err", code: -1, userInfo: ["msg": "voiceStickers count += nil"])
            exportCompletion?(error as Error, nil)
            return
        }

        guard let totalDuration = data?.reduce(0, { partialResult, itemModell in
            itemModell.materialDuraion + partialResult
        }) else {
            let error = NSError(domain: "err", code: -1, userInfo: ["msg": "时长计算出错"])
            exportCompletion?(error as Error, nil)
            return
        }

        // 有录音操作或者多个视频，就会进入合成步骤，否则就是一个没有处理的素材，直接导出就行了
        if voiceCount > 0 || videoStickers.count > 1 {
            let (audioMix, composition) = mergeAudio(videoStickers: videoStickers, audios: voiceList, synthesisAll: synthesisAll)

            var filters:[PQBaseFilter] =  Array.init()
            for sticker in videoStickers {
                filters.append(PQMovieFilter(movieSticker: sticker))
            }
            let outputSize:CGSize = CGSize(width: 1080.0, height: 1080 * CGFloat(Int(UIScreen.main.bounds.size.height / UIScreen.main.bounds.size.width)))
            BFLog(message: "输出视频大小:\(outputSize)")
            
            //add by ak 有字幕数据 & 显示字幕开关打开 添加字幕filter
            if(titleStickers.count > 0 && ( titleStickers.first?.setting.subtitleIsShow ?? true)){
                filters.append(PQSubTitleFilter.init(st: titleStickers, inputSize: outputSize))
            }
            
            
            exporter = PQCompositionExporter(asset: composition, videoComposition: nil, audioMix: audioMix, filters: filters, animationTool: nil, exportURL: outPutMP4URL)
 
            var orgeBitRate = Int(outputSize.width * outputSize.height * 3)

            for stick in videoStickers {
                if stick.type == StickerType.VIDEO.rawValue {
                    let asset = AVURLAsset(url: URL(fileURLWithPath: stick.locationPath), options: avAssertOptions)

                    let cbr = asset.tracks(withMediaType: .video).first?.estimatedDataRate
                    if Int(cbr ?? 0) > orgeBitRate {
                        orgeBitRate = Int(cbr ?? 0)
                    }
                }
            }

            BFLog(1, message: "导出设置的码率为:\(orgeBitRate)")
            let tempBeginExport = Date().timeIntervalSince1970
            if exporter!.prepare(videoSize: outputSize, videoAverageBitRate: orgeBitRate) {
                exporter!.start(playeTimeRange: CMTimeRange(start: CMTime.zero, end: synthesisAll ? CMTime(seconds: totalDuration, preferredTimescale: 100) : composition.duration))
            }
            exporter?.progressClosure = { [weak self] _, _, progress in
                //            BFLog(message: "正片合成进度 \(progress * 100)%")
                let useProgress = progress > 1 ? 1 : progress
                if progress > 0 { // 更新进度
                    self?.progress?(useProgress)
                }
            }
            exporter?.completion = { [weak self] url in
                // 输出视频时长
                if let url = url {
                    let outSeconds = CMTimeGetSeconds(AVAsset(url: url).duration)

                    let exportEndTime = Date().timeIntervalSince1970
                    BFLog(1, message: "视频导出完成: \(String(describing: url)) 生成视频时长为：\(outSeconds) 总用时:\(exportEndTime - tempBeginExport)")
                    
                    
                    cShowHUB(superView: nil, msg: (outSeconds == 0) ? "合成失败请重试。" : "合成成功")
                    self?.exportCompletion?(nil, url)

                } else {
                    let error = NSError(domain: "err", code: -1, userInfo: nil)
                    self?.exportCompletion?(error as Error, nil)
                    cShowHUB(superView: nil, msg: "导出失败")
                }

                // 导出完成后取消导出
                self?.exporter?.cancel()
            }
        } else {
            // 没有处理，直接copy原文件
            if let localPath = data?.first?.localPath {
                exportCompletion?(nil, URL(fileURLWithPath: localPath))
            }
        }
    }

    func dealAsset() {
//        asset?.tracks.first(where: { track in
//            if track.mediaType == .audio{
//
//            }
//        })
    }

    func getVideoSize(asset: AVURLAsset) -> CGSize {
        var size = CGSize.zero
        asset.tracks.forEach { track in
            if track.mediaType == .video {
                let realSize = __CGSizeApplyAffineTransform(track.naturalSize, track.preferredTransform)
                size = CGSize(width: ceil(abs(realSize.width)), height: ceil(abs(realSize.height)))
            }
        }

        return size
    }
}

extension BFRecordExport {
    func mergeAudio(videoStickers: [PQEditVisionTrackMaterialsModel], audios: [PQVoiceModel]?, synthesisAll: Bool) -> (AVMutableAudioMix, AVMutableComposition) {
        let composition = AVMutableComposition()
        let audioMix = AVMutableAudioMix()
        var tempParameters = [AVMutableAudioMixInputParameters]()

        var totalDuration: Float64 = 0
        for sticker in videoStickers {
            if sticker.volumeGain == 0 {
                // 如果添加了会有刺啦音
                BFLog(message: "音频音量 为0 不添加")
                continue
            }
            sticker.volumeGain = 50
            totalDuration = max(totalDuration, sticker.duration)
            tempParameters += PQPlayerViewModel.dealWithMaterialTrack(stickerModel: sticker, composition: composition)
        }
        if let voices = audios {
            if synthesisAll {
                tempParameters += mergeRecordVoiceAll(voices: voices, composition)
            } else {
                tempParameters += mergeRecordVoiceOnly(voices: voices, composition)
            }
        }
        audioMix.inputParameters = tempParameters
        return (audioMix, composition)
    }

    func mergeRecordVoiceOnly(voices: [PQVoiceModel], _ composition: AVMutableComposition) -> [AVMutableAudioMixInputParameters] {
        var tempParameters = [AVMutableAudioMixInputParameters]()
        var totalDur: Double = 0.0
        for model in voices {
            if model.volume == 0 {
                // 如果添加了会有刺啦音
                BFLog(message: "音频音量 为0 不添加")
                continue
            }
            let duration = model.endTime - model.startTime

            let sticker = PQEditVisionTrackMaterialsModel()
            sticker.model_in = 0
            sticker.out = duration
            sticker.timelineIn = totalDur
            sticker.aptDuration = duration
            sticker.duration = duration
            sticker.locationPath = model.wavFilePath
            sticker.volumeGain = 100 // Float64(model.volume)
            tempParameters += PQPlayerViewModel.dealWithMaterialTrack(stickerModel: sticker, composition: composition)
            totalDur += duration
        }

        return tempParameters
    }

    func mergeRecordVoiceAll(voices: [PQVoiceModel], _ composition: AVMutableComposition) -> [AVMutableAudioMixInputParameters] {
        var tempParameters = [AVMutableAudioMixInputParameters]()
        for model in voices {
            if model.volume == 0 {
                // 如果添加了会有刺啦音
                BFLog(message: "音频音量 为0 不添加")
                continue
            }
            let sticker = PQEditVisionTrackMaterialsModel()
            sticker.model_in = 0
            sticker.timelineIn = model.startTime
            sticker.out = model.endTime
            sticker.aptDuration = model.endTime - model.startTime
            sticker.duration = sticker.aptDuration
            sticker.locationPath = model.wavFilePath
            sticker.volumeGain = 100 // Float64(model.volume)
            tempParameters += PQPlayerViewModel.dealWithMaterialTrack(stickerModel: sticker, composition: composition)
        }

        return tempParameters
    }
}