c# - 将 Accord 音频库与 Windows Phone 8.1 应用程序(非 Silverlight)一起使用

Question

我目前正在使用 C# 为 Windows Phone 8.1 构建应用程序，

该应用程序的目的是评估来自设备麦克风的音频信号，最初是针对频率，

我希望使用 Accord 库来帮助解决这个问题，但遇到了这些错误:

XamlCompiler error WMC1006: Cannot resolve Assembly or Windows Metadata file 'System.Windows.Forms.dll'

\Program Files (x86)\MSBuild\Microsoft\WindowsXaml\v12.0\8.1\Microsoft.Windows.UI.Xaml.Common.targets(327,9): Xaml Internal Error error WMC9999: Type universe cannot resolve assembly: System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089.

我相当确定这是由于项目中包含的引用而引起的，但我不确定，

这是我当前的代码:

    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Runtime.InteropServices.WindowsRuntime;
    using Windows.Foundation;
    using Windows.Foundation.Collections;
    using Windows.UI.Xaml;
    using Windows.UI.Xaml.Controls;
    using Windows.UI.Xaml.Controls.Primitives;
    using Windows.UI.Xaml.Data;
    using Windows.UI.Xaml.Input;
    using Windows.UI.Xaml.Media;
    using Windows.UI.Xaml.Navigation;
    using Accord.Audio;
    using Accord.Controls;
    using Accord.DirectSound;
    using Accord.Imaging;
    using Accord.MachineLearning;
    using Accord.Math;
    using Accord.Statistics;
    using Accord;
    using AForge;
    using AForge.Controls;
    using AForge.Imaging;
    using AForge.Math;
    using AForge.Video;
    using Windows.Media.Capture;
    using Windows.Storage;
    using Windows.Storage.Streams;
    using Windows.Storage.Pickers;
    using System.Diagnostics;
    using Windows.Media;
    using Windows.Media.MediaProperties;
    using Accord.Audio.Formats;
    using Accord.Audio.Windows;

    namespace Test2
    {
        public sealed partial class MainPage : Page
    {
        private MediaCapture _mediaCaptureManager;
        private StorageFile _recordStorageFile;
        private bool _recording;
        private bool _userRequestedRaw;
        private bool _rawAudioSupported;
        private IRandomAccessStream _audioStream;
        private FileSavePicker _fileSavePicker;
        private DispatcherTimer _timer;
        private TimeSpan _elapsedTime;


        public MainPage()
        {
            this.InitializeComponent();

            this.NavigationCacheMode = NavigationCacheMode.Required;

            InitializeAudioRecording();
        }
        private static void DecodeAudioFile()
        {

            String fileName = "record.wav";

            WaveDecoder sourceDecoder = new WaveDecoder(fileName);

            Signal sourceSignal = sourceDecoder.Decode();

            RaisedCosineWindow window = RaisedCosineWindow.Hamming(1024);

            Signal[] windows = sourceSignal.Split(window, 512);

            ComplexSignal[] complex = windows.Apply(ComplexSignal.FromSignal);

            complex.ForwardFourierTransform();

            Debug.WriteLine(complex);
        }

        protected override void OnNavigatedTo(NavigationEventArgs e)
        {

        }

        private async void InitializeAudioRecording()
        {
            _mediaCaptureManager = new MediaCapture();
            var settings = new MediaCaptureInitializationSettings();
            settings.StreamingCaptureMode = StreamingCaptureMode.Audio;
            settings.MediaCategory = MediaCategory.Other;
            settings.AudioProcessing = (_rawAudioSupported && _userRequestedRaw) ? AudioProcessing.Raw : AudioProcessing.Default;

            await _mediaCaptureManager.InitializeAsync(settings);

            Debug.WriteLine("Device initialised successfully");

            _mediaCaptureManager.RecordLimitationExceeded += new RecordLimitationExceededEventHandler(RecordLimitationExceeded);
            _mediaCaptureManager.Failed += new MediaCaptureFailedEventHandler(Failed);
        }

        private void Failed(MediaCapture sender, MediaCaptureFailedEventArgs errorEventArgs)
        {
            throw new NotImplementedException();
        }

        private void RecordLimitationExceeded(MediaCapture sender)
        {
            throw new NotImplementedException();
        }



        private async void CaptureAudio()
        {
            try
            {
                Debug.WriteLine("Starting record");
                String fileName = "record.wav";

                _recordStorageFile = await KnownFolders.VideosLibrary.CreateFileAsync(fileName, CreationCollisionOption.GenerateUniqueName);

                Debug.WriteLine("Create record file successfully");
                Debug.WriteLine(fileName);
                MediaEncodingProfile recordProfile = MediaEncodingProfile.CreateWav(AudioEncodingQuality.Auto);


                await _mediaCaptureManager.StartRecordToStorageFileAsync(recordProfile, this._recordStorageFile);

                Debug.WriteLine("Start Record successful");
                _recording = true;
            }
            catch (Exception e)
            {
                Debug.WriteLine("Failed to capture audio");
            }

            DecodeAudioFile();
        }
        private async void StopCapture()
        {
            if (_recording)
            {
                Debug.WriteLine("Stopping recording");
                await _mediaCaptureManager.StopRecordAsync();
                Debug.WriteLine("Stop recording successful");

                _recording = false;
            }
        }

        private async void PlayRecordedCapture()
        {
            if (!_recording)
            {
                var stream = await _recordStorageFile.OpenAsync(FileAccessMode.Read);
                Debug.WriteLine("Recording file opened");
                playbackElement1.AutoPlay = true;
                playbackElement1.SetSource(stream, _recordStorageFile.FileType);
                playbackElement1.Play();
            }
        }

        private void Capture_Click(object sender, RoutedEventArgs e)
        {
            Capture.IsEnabled = false;
            Stop.IsEnabled = true;
            CaptureAudio();
        }

        private void Stop_Click(object sender, RoutedEventArgs e)
        {
            Capture.IsEnabled = true;
            Stop.IsEnabled = false;
            StopCapture();
        }

        private void Playback_Click(object sender, RoutedEventArgs e)
        {
            PlayRecordedCapture();
        }
        private void backBtn_Click(object sender, RoutedEventArgs e)
        {
            if (Frame.CanGoBack)
            {
                Frame.GoBack();
            }
        }
    }
}

对于解决这些错误的任何帮助或指导，我们将不胜感激，

谢谢

Answer 1

原始 Accord.NET Framework 在 .NET 以外的其他平台上无法访问。

有一项工作(我负责)通过可移植类库将 Accord.NET 移植到移动平台。其中一些包也已在 NuGet 上发布(前缀 Portable Accord)。

Audio 包未在 NuGet 上发布，但您应该能够从 Windows Phone 8.1 的源代码构建它。您可以找到 Portable Accord 的来源 here .

请注意，仅支持播放，不支持录制。