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?????????????????????????????????????????????????????????????beginFrame???????endFrame???????????seekFrame????????????WQAudioEditModel?????????????????????????????

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class WQAudioEditModel: NSObject {
    var beginFrame: Int64!
    var endFrame: Int64!
    var seekFrame: Int64!
    var fileUrl: URL!
    var audioFile: AVAudioFile!
    var editAction: AudioEditActionEnum!
    
    class func model(bgFrame: Int64, edFrame: Int64, editAction: AudioEditActionEnum, fileUrl: URL) -> WQAudioEditModel {
        let model = WQAudioEditModel()
        model.beginFrame = bgFrame
        model.endFrame = edFrame
        model.seekFrame = bgFrame
        model.editAction = editAction
        model.fileUrl = fileUrl
        do {
            try model.audioFile = AVAudioFile.init(forReading: fileUrl)
        } catch {
            // ????????
        }
        return model
    }
}

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private func config() {
    self.editModelArray = NSMutableArray.init()
    let firstModel = WQAudioEditModel.model(bgFrame: 0, edFrame: 0, editAction: .none, fileUrl: self.defaultUrl)
    firstModel.endFrame = firstModel.audioFile.length
    self.editModelArray.add(firstModel)
}

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????????????????????????copyArray???????????????????????????????????????????

func copyAction(firstFrame: Int64, endFrame: Int64) {
    self.copyArray = NSMutableArray.init()
    let cpLength = endFrame - firstFrame
    var realLoc: Int64 = 0
    for model in self.editModelArray {
        let aeModel = model as! WQAudioEditModel
        let modelLength = aeModel.endFrame - aeModel.beginFrame
        if realLoc + modelLength > firstFrame {
            if realLoc + modelLength >= endFrame {
                let cpFirstFrame = firstFrame - realLoc + aeModel.beginFrame
                let cpEndFrame = cpFirstFrame + cpLength
                let cpModel = WQAudioEditModel.model(bgFrame: cpFirstFrame, edFrame: cpEndFrame, editAction: .copy, fileUrl: aeModel.fileUrl)
                self.copyArray.add(cpModel.reinitModel())
                break
            } else if realLoc + modelLength < endFrame {
                let cpFirstFrame = firstFrame - realLoc + aeModel.beginFrame
                self.copyArray.add(WQAudioEditModel.model(bgFrame: cpFirstFrame, edFrame: aeModel.endFrame, editAction: .copy, fileUrl: aeModel.fileUrl))
                
                let index = self.editModelArray.index(of: model)
                let lastArray = self.editModelArray.subarray(with: NSMakeRange(index + 1, self.editModelArray.count - index - 1))
                for lastModel in lastArray {
                    let lastM = lastModel as! WQAudioEditModel
                    let lastMLength = lastM.endFrame - lastM.beginFrame
                    if realLoc + lastMLength > endFrame {
                        self.copyArray.add(WQAudioEditModel.model(bgFrame: lastM.beginFrame, edFrame: endFrame - realLoc + lastM.beginFrame, editAction: .copy, fileUrl: aeModel.fileUrl))
                        break
                    } else {
                        realLoc = realLoc + lastMLength
                        self.copyArray.add(lastM.reinitModel())
                    }
                }
                break
            }
        } else {
            realLoc = modelLength + realLoc
        }
    }
}

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???????????????seekFrame????????????????????????????????????????

func pasteAction(locFrame: Int64) {
    if self.copyArray.count > 0 {
        var realLoc: Int64 = 0
        let forModel = NSArray.init(array: self.editModelArray)
        for model in forModel {
            let aeModel = model as! WQAudioEditModel
            let modelLength = aeModel.endFrame - aeModel.beginFrame
            if realLoc + modelLength > locFrame {
                let index = self.editModelArray.index(of: model)
                if realLoc == locFrame {
                    let lastarray = self.editModelArray.subarray(with: NSMakeRange(index, self.editModelArray.count - index))
                    self.editModelArray.removeObjects(in: lastarray)
                    self.editModelArray.addObjects(from: self.copyArray as! [Any])
                    self.editModelArray.addObjects(from: lastarray)
                } else {
                    let newModel1 = WQAudioEditModel.model(bgFrame: aeModel.beginFrame, edFrame: locFrame - realLoc + aeModel.beginFrame, editAction: .none, fileUrl: aeModel.fileUrl)
                    self.editModelArray.replaceObject(at: index, with: newModel1)
                    let lastarray = self.editModelArray.subarray(with: NSMakeRange(index + 1, self.editModelArray.count - index - 1))
                    self.editModelArray.removeObjects(in: lastarray)
                    let newModel2 = WQAudioEditModel.model(bgFrame: locFrame - realLoc + aeModel.beginFrame, edFrame: aeModel.endFrame, editAction: .none, fileUrl: aeModel.fileUrl)
                    self.editModelArray.addObjects(from: self.copyArray as! [Any])
                    self.editModelArray.add(newModel2)
                    self.editModelArray.addObjects(from: lastarray)
                }
                break
            } else if realLoc + modelLength == locFrame {
                let index = self.editModelArray.index(of: model)
                let lastarray = self.editModelArray.subarray(with: NSMakeRange(index + 1, self.editModelArray.count - index - 1))
                self.editModelArray.removeObjects(in: lastarray)
                self.editModelArray.addObjects(from: self.copyArray as! [Any])
                self.editModelArray.addObjects(from: lastarray)
                break
            } else {
                realLoc = realLoc + modelLength
            }
        }
    }
}

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func cutAction(firstFrame: Int64, endFrame: Int64) {
    self.copyAction(firstFrame: firstFrame, endFrame: endFrame)
    var realLoc: Int64 = 0
    let forModel = NSArray.init(array: self.editModelArray)
    for model in forModel {
        let aeModel = model as! WQAudioEditModel
        let modelLength = aeModel.endFrame - aeModel.beginFrame
        if realLoc + modelLength > firstFrame {
            let index = self.editModelArray.index(of: model)
            if realLoc + modelLength >= endFrame {
                if realLoc == firstFrame {
                    if realLoc + modelLength != endFrame {
                        let newModel2 = WQAudioEditModel.model(bgFrame: endFrame - realLoc, edFrame: aeModel.endFrame, editAction: .none, fileUrl: aeModel.fileUrl)
                        self.editModelArray.replaceObject(at: index, with: newModel2)
                    }
                } else {
                    let newModel1 = WQAudioEditModel.model(bgFrame: aeModel.beginFrame, edFrame: firstFrame - realLoc, editAction: .none, fileUrl: aeModel.fileUrl)
                    self.editModelArray.replaceObject(at: index, with: newModel1)
                    if realLoc + modelLength != endFrame {
                        let newModel2 = WQAudioEditModel.model(bgFrame: endFrame - realLoc, edFrame: aeModel.endFrame, editAction: .none, fileUrl: aeModel.fileUrl)
                        self.editModelArray.insert(newModel2, at: index + 1)
                    }
                }
                break
            } else if realLoc + modelLength < endFrame {
                let cutFirstFrame = firstFrame - realLoc + aeModel.beginFrame
                let newFirstModel = WQAudioEditModel.model(bgFrame: aeModel.beginFrame, edFrame: cutFirstFrame, editAction: .none, fileUrl: aeModel.fileUrl)
                self.editModelArray.replaceObject(at: index, with: newFirstModel)
                
                let index = self.editModelArray.index(of: model)
                let lastArray = self.editModelArray.subarray(with: NSMakeRange(index + 1, self.editModelArray.count - index - 1))
                for lastModel in lastArray {
                    let lastM = lastModel as! WQAudioEditModel
                    let lastMLength = lastM.endFrame - lastM.beginFrame
                    if realLoc + lastMLength > endFrame {
                        let newEndModel = WQAudioEditModel.model(bgFrame: endFrame - realLoc + lastM.beginFrame, edFrame: lastM.endFrame, editAction: .none, fileUrl: aeModel.fileUrl)
                        let cutIndex = self.editModelArray.index(of: lastM)
                        self.editModelArray.replaceObject(at: cutIndex, with: newEndModel)
                        break
                    } else {
                        realLoc = realLoc + lastMLength
                        self.editModelArray.remove(lastModel)
                    }
                }
                break
            }
        } else {
            realLoc = realLoc + modelLength
        }
    }
}

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???????? AVAudioPlayerNode ???????????????????????????? 1024 ????????????????????????? completionHandler ?????????????????????

open func scheduleSegment(_ file: AVAudioFile, startingFrame startFrame: AVAudioFramePosition, frameCount numberFrames: AVAudioFrameCount, at when: AVAudioTime?, completionHandler: AVAudioNodeCompletionHandler? = nil) {
    self.playerNode.scheduleSegment(file, startingFrame: startFrame, frameCount: numberFrames, at: when, completionHandler: completionHandler)
}
@objc private func playNoti(noti: Notification) {
    let model = noti.object as! WQAudioEditModel
    if self.playerNode.isPlaying == false {
        model.seekFrame = model.beginFrame
        NotificationCenter.default.removeObserver(self)
        if self.playFinishBlock != nil {
            self.playFinishBlock()
        }
        return
    }
    if model.seekFrame >= model.endFrame {
        let index = self.editModelArray.index(of: model)
        if index < self.editModelArray.count - 1 {
            model.seekFrame = model.beginFrame
            let nextModel = self.editModelArray.object(at: index + 1) as! WQAudioEditModel
            self.realScheduleSegment(fromFrame: nextModel.seekFrame, length: self.segLength, model: nextModel)
        } else {
            model.seekFrame = model.beginFrame
            NotificationCenter.default.removeObserver(self)
            if self.playFinishBlock != nil {
                self.playFinishBlock()
            }
        }
    } else if (model.seekFrame + self.segLength < model.endFrame) {
        self.realScheduleSegment(fromFrame: model.seekFrame, length: self.segLength, model: model)
    } else if (model.seekFrame + self.segLength >= model.endFrame) {
        self.realScheduleSegment(fromFrame: model.seekFrame, length: model.endFrame - model.seekFrame, model: model)
    }
}

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?????? AVAudioFile ??????????????????????????????????????????????

func beginSave() {
    var writeFile: AVAudioFile! = nil
    do {
        writeFile = try AVAudioFile.init(forWriting: URL.init(string: self.fileUrl)!, settings: [AVFormatIDKey:NSNumber.init(value: kAudioFormatLinearPCM), AVNumberOfChannelsKey:NSNumber.init(value: 2), AVSampleRateKey:NSNumber.init(value: self.actionTool.getSampleRate())])
    } catch {
        // ????????
    }
    if writeFile == nil {
        return
    }
    for model in self.editModelArray as! [WQAudioEditModel] {
        let buffer = AVAudioPCMBuffer.init(pcmFormat: model.audioFile.processingFormat, frameCapacity: AVAudioFrameCount(model.endFrame - model.beginFrame))!
        model.audioFile.framePosition = model.beginFrame
        do {
            try model.audioFile.read(into: buffer, frameCount: AVAudioFrameCount(model.endFrame - model.beginFrame))
        } catch {
            // ??????
        }
        do {
            try writeFile.write(from: buffer)
        } catch {
            // ??????
        }
    }
    do {
        try self.editPlay.audioEngine.start()
    } catch {
        // ??????
    }
}

?????????????????????????????????????????? AVAudioFile?AVAudioPlayerNode ? AVAudioEngine ??????????????????????????????????????????????????????

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