Question

AVAudioConverter似乎在iOS 10中被破坏了。该代码在iOS 9中运行，现在

错误域= NSOSStatusErrorDomain代码= -50“（null）”

无论使用何种音频格式，都会返回

。每年都让我感到惊讶，基本的库功能停止工作。

func audioConverterFailureIOS10() {
    // Describe the audio format
    let inFormat = AVAudioFormat(standardFormatWithSampleRate: 44100, channels: 2)
    let outFormat = AVAudioFormat(standardFormatWithSampleRate: 22050, channels: 2)

    // Allocate buffers
    let outBuffer = AVAudioPCMBuffer(pcmFormat: outFormat, frameCapacity: 1024)

    // Create an input block that is called when the converter needs input
    let inputBlock : AVAudioConverterInputBlock = { (inNumPackets, outStatus) -> AVAudioBuffer? in
        // Fails before entering here
        return nil
    }

    // Create the audio converter
    let converter = AVAudioConverter(from: inFormat, to: outFormat)

    var error : NSError?
    _ = converter.convert(to: outBuffer, error: &error, withInputFrom: inputBlock)

    // Error Domain=NSOSStatusErrorDomain Code=-50 "(null)"
    print(error)
}

Answer 1

因此，事实证明outBuffer frameLength必须设置为frameCapacity。默认情况下，长度为0，显然在iOS 10上的处理方式不同

AVAudioConverter在iOS 10中被破坏了

1 个答案: