c# – 通过Xamarin.Android连接到Microsoft的认知说话人识别API

概述我正在构建一个测试应用程序,通过Microsoft的Cognitive Speaker Recognition API对用户进行身份验证.这似乎很简单,但正如他们在 API Docs中所提到的,在创建注册时,我需要发送我记录的音频文件的byte [].现在,因为我使用Xamarin.Android,我能够录制音频并保存.现在,THAT音频的要求非常具体,微软的认知说话人识别API. 根据API文档 我正在构建一个测试应用程序,通过Microsoft的Cognitive Speaker Recognition API对用户进行身份验证.这似乎很简单,但正如他们在 API Docs中所提到的,在创建注册时,我需要发送我记录的音频文件的byte [].现在,因为我使用Xamarin.AndroID,我能够录制音频并保存.现在,THAT音频的要求非常具体,微软的认知说话人识别API.

根据api文档,音频文件格式必须满足以下要求.

Container -> WAVEnCoding -> PCMRate -> 16KSample Format -> 16 bitChannels -> Mono

继this recipe之后,我成功录制了音频,在玩了一些AndroID文档之后,我也能够实现这些设置：

_recorder.SetoutputFormat(OutputFormat.ThreeGpp);_recorder.SetAudioChannels(1);_recorder.SetAudioSamplingRate(16);_recorder.SetAudioEnCodingBitRate(16000);_recorder.SetAudioEncoder((AudioEncoder) EnCoding.Pcm16bit);

这符合所需音频文件的大多数标准.但是,我似乎无法以实际的“.wav”格式保存文件,我无法验证文件是否实际上是PCM编码.

这是我的AXML和MainActivity.cs：Github Gist

我也跟着this code并将其合并到我的代码中：Github Gist

该文件的规格看起来很好,但持续时间是错误的.无论我录制多长时间,它只显示250毫秒,这导致音频太短.

有没有办法做到这一点？基本上我只想通过Xamarin.AndroID连接到Microsoft的认知说话人识别API.我找不到任何这样的资源来指导自己.

解决方法 录音

将Audio Recorder Plugin NuGet Package添加到AndroID项目(如果您使用它们,则添加到任何PCL,netstandard或iOS库).

AndroID项目配置

>在AndroIDMainifest.xml中,添加以下权限：

<uses-permission androID:name="androID.permission.MODIFY_AUdio_SETTINGS" /><uses-permission androID:name="androID.permission.READ_EXTERNAL_STORAGE" /><uses-permission androID:name="androID.permission.RECORD_AUdio" /><uses-permission androID:name="androID.permission.WRITE_EXTERNAL_STORAGE" /><uses-permission androID:name="androID.permission.INTERNET" />

>在AndroIDManifest.xml中,在< application>< / application>中添加以下提供程序.标签.

<provIDer androID:name="androID.support.v4.content.fileProvIDer" androID:authoritIEs="${applicationID}.fileprovIDer" androID:exported="false" androID:grantUriPermissions="true">    <Meta-data androID:name="androID.support.file_PROVIDER_PATHS" androID:resource="@xml/file_paths"></Meta-data></provIDer>

>在Resources文件夹中,创建一个名为xml的新文件夹
>在Resources / xml内部,创建一个名为file_paths.xml的新文件

>在file_paths.xml中,添加以下代码,将[您的包名称]替换为AndroID项目的包

06002

示例包名称

AndroID录音机代码

AudioRecorderService AudioRecorder { get; } = new AudioRecorderService{    StopRecordingOnSilence = true,PreferredSampleRate = 16000});public async Task StartRecording(){    AudioRecorder.AudioinputReceived += HandleAudioinputReceived;    await AudioRecorder.StartRecording();}public async Task StopRecording(){    AudioRecorder.AudioinputReceived += HandleAudioinputReceived;    await AudioRecorder.StartRecording();}async voID HandleAudioinputReceived(object sender,string e){    AudioRecorder.AudioinputReceived -= HandleAudioinputReceived;    PlaybackRecording();    //replace [UserGuID] with your unique GuID    await EnrollSpeaker(AudioRecorder.GetAudiofileStream(),[UserGuID]);}

认知服务说话人识别码

httpClIEnt ClIEnt { get; } = CreatehttpClIEnt(TimeSpan.FromSeconds(10));public static async Task<EnrollmentStatus?> EnrollSpeaker(Stream audioStream,GuID userGuID){    Enrollment response = null;    try    {        var boundryString = "Upload----" + DateTime.Now.ToString("u").Replace(" ","");        var content = new MultipartFormDataContent(boundryString)        {            { new StreamContent(audioStream),"enrollmentData",userGuID.ToString("D") + "_" + DateTime.Now.ToString("u") }        };        var requestUrl = "https://westus.API.cognitive.microsoft.com/spID/v1.0/verificationProfiles" + "/" + userGuID.ToString("D") + "/enroll";        var result = await ClIEnt.PostAsync(requestUrl,content).ConfigureAwait(false);        string resultStr = await result.Content.ReadAsstringAsync().ConfigureAwait(false);        if (result.StatusCode == httpStatusCode.OK)            response = JsonConvert.DeserializeObject<Enrollment>(resultStr);        return response?.EnrollmentStatus;    }    catch (Exception)    {    }    return response?.EnrollmentStatus;}static httpClIEnt CreatehttpClIEnt(TimeSpan timeout){    httpClIEnt clIEnt = new httpClIEnt();    clIEnt.Timeout = timeout;    clIEnt.DefaultRequestheaders.AcceptEnCoding.Add(new StringWithQualityheaderValue("gzip"));    clIEnt.DefaultRequestheaders.Accept.Add(new MediaTypeWithQualityheaderValue("application/Json"));    //replace [Your Speaker Recognition API Key] with your Speaker Recognition API Key from the Azure Portal    clIEnt.DefaultRequestheaders.Add("Ocp-APIm-Subscription-Key",[Your Speaker Recognition API Key]);    return clIEnt;}public class Enrollment : EnrollmentBase{    [JsonConverter(typeof(StringEnumConverter))]    public EnrollmentStatus EnrollmentStatus { get; set; }    public int RemainingEnrollments { get; set; }    public int EnrollmentsCount { get; set; }    public string Phrase { get; set; }}public enum EnrollmentStatus{    Enrolling    Training,Enrolled}

音频播放

组态

将SimpleAudioPlayer Plugin NuGet Package添加到AndroID项目(如果您使用它们,netstandard或iOS库).

码

public voID PlaybackRecording(){    var isAudioLoaded = Plugin.SimpleAudioPlayer.CrossSimpleAudioPlayer.Current.Load(AudioRecorder.GetAudiofileStream());    if (isAudioLoaded)        Plugin.SimpleAudioPlayer.CrossSimpleAudioPlayer.Current.Play();}

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