将pcm加载到AVAudioPCMBuffer [英] load a pcm into a AVAudioPCMBuffer

问题描述

我有此代码:

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

And I get the following error: 1954115647 which is: kAudioFileUnsupportedFileTypeError

我的A4.f32文件包含PCM浮点32.这里缺少什么吗?我的文件中没有标题，是否可能导致此问题?

My A4.f32 file contains a PCM float 32. Is there something I'm missing here? There's no header in my file, is it something that could lead to this problem?

推荐答案

感谢Rhythmic Fistman的评论，我亲自去加载了它，

Thanks to Rhythmic Fistman in the comments, I went and loaded it myself, that way:

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)
    }
}

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