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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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