swift – 将pcm加载到AVAudioPCMBuffer中

发布时间：2020-12-14 04:31:32 所属栏目：百科来源：网络整理

导读：我有这个代码： func loadSoundfont(_ pitch : String) { let path: String = Bundle.main.path(forResource: "(self.id)/(pitch)",ofType: "f32")! let url = URL(fileURLWithPath: path) do { let file = try AVAudioFile(forReading: url,commonFormat:

我有这个代码：

func loadSoundfont(_ pitch : String) {
    let path: String = Bundle.main.path(forResource: "(self.id)/(pitch)",ofType: "f32")!
    let url = URL(fileURLWithPath: path)

    do {
        let file = try AVAudioFile(forReading: url,commonFormat: AVAudioCommonFormat.pcmFormatFloat32,interleaved: true)
        let format = file.processingFormat
        let capacity = AVAudioFrameCount(file.length)
        self.buffer = AVAudioPCMBuffer(pcmFormat: format,frameCapacity: capacity)
        try file.read(into: self.buffer!)
    } catch let error as NSError {
        print("ERROR HERE",error.localizedDescription)
    }
}

我得到以下错误：1954115647这是：kAudioFileUnsupportedFileTypeError

我的A4.f32文件包含一个PCM浮动32.这里有什么我想念的吗？我的文件中没有标题,是否可能导致此问题？

解决方法

感谢Rhythmic Fistman的评论,我自己去加载它,就这样：

func loadSoundfont(_ pitch : String) {
    let path: String = Bundle.main.path(forResource: "(self.id)/(pitch)",ofType: "f32")!
    let url = URL(fileURLWithPath: path)

    do {
        let data = try Data(contentsOf: url)
        let format = AVAudioFormat(commonFormat: .pcmFormatFloat32,sampleRate: 44100,channels: 2,interleaved: true)

        self.buffer = AVAudioPCMBuffer(pcmFormat: format,frameCapacity: AVAudioFrameCount(data.count))

        self.buffer!.floatChannelData!.pointee.withMemoryRebound(to: UInt8.self,capacity: data.count) {
            let stream = OutputStream(toBuffer: $0,capacity: data.count)
            stream.open()
            _ = data.withUnsafeBytes {
                stream.write($0,maxLength: data.count)
            }
            stream.close()
        }

    } catch let error as NSError {
        print("ERROR HERE",error.localizedDescription)
    }
}

（编辑：李大同）

【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容!