我正在尝试将SetInputToAudioStream方法用于语音引擎。
但是它不起作用。我也搜索了几篇文章，并尝试了所有可能的方法。但它仍然不起作用。
https://stackoverflow.com/a/6203533/1336662
https://stackoverflow.com/a/6203533/1336662
为了使SpeechRecognitionEngine正常工作，我必须使用Sean's response中描述的SpeechStreamer类。
这是我的代码，如果有人可以帮助我，那太好了。
using NAudio.Wave;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Speech.Recognition;
using System.Speech.AudioFormat;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Threading;
namespace WpfAppNAudio
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
console.AppendText("Click to start recording");
}
public WaveIn waveSource = null;
public WaveFileWriter waveFile = null;
private SpeechRecognitionEngine _recognizer = null;
//Stream a = null;
SpeechStreamer stream = null;
private bool _recognizing;
void RecognizeSpeechAndWriteToConsole()
{
_recognizer = new SpeechRecognitionEngine();
try
{
//_recognizer.
// Create and load a grammar.
Grammar dictation = new DictationGrammar();
dictation.Name = "Dictation Grammar";
_recognizer.LoadGrammar(dictation);
_recognizer.SpeechRecognized += _recognizer_SpeechRecognized; // if speech is recognized, call the specified method
_recognizer.SpeechRecognitionRejected += _recognizer_SpeechRecognitionRejected; // if recognized speech is rejected, call the specified method
_recognizer.SpeechDetected += _recognizer_SpeechDetected;
_recognizer.RecognizeCompleted += _recognizer_RecognizeCompleted;
}
catch (Exception)
{
}
}
private void _recognizer_RecognizeCompleted(object sender, RecognizeCompletedEventArgs e)
{
}
private void _recognizer_SpeechDetected(object sender, SpeechDetectedEventArgs e)
{
}
private void _recognizer_SpeechRecognitionRejected(object sender, SpeechRecognitionRejectedEventArgs e)
{
console.AppendText("speech rejected");
}
private void _recognizer_SpeechRecognized(object sender, SpeechRecognizedEventArgs e)
{
console.AppendText("speech recognized" + e.Result.Text);
}
private void StartBtn_Click()
{
waveSource = new WaveIn();
waveSource.WaveFormat = new WaveFormat(22050, 8, 1);
waveSource.DataAvailable += new EventHandler<WaveInEventArgs>(waveSource_DataAvailable);
waveSource.RecordingStopped += new EventHandler<StoppedEventArgs>(waveSource_RecordingStopped);
waveFile = new WaveFileWriter(@"C:\Temp\Test0001.wav", waveSource.WaveFormat);
console.AppendText("Starting recording");
RecognizeSpeechAndWriteToConsole();
waveSource.StartRecording();
}
void StopBtn_Click(object sender, EventArgs e)
{
waveSource.StopRecording();
}
void waveSource_DataAvailable(object sender, WaveInEventArgs e)
{
if (waveFile != null)
{
stream = new SpeechStreamer(e.Buffer.Length);
stream.Write(e.Buffer, 0, e.BytesRecorded);
waveFile.Write(e.Buffer, 0, e.BytesRecorded);
waveFile.Flush();
if (!_recognizing)
{
_recognizing = true;
_recognizer.SetInputToAudioStream(stream, new System.Speech.AudioFormat.SpeechAudioFormatInfo(22050, System.Speech.AudioFormat.AudioBitsPerSample.Eight, System.Speech.AudioFormat.AudioChannel.Mono));
var s = _recognizer.RecognizerInfo.SupportedAudioFormats;
_recognizer.RecognizeAsync(RecognizeMode.Multiple);
}
}
}
void waveSource_RecordingStopped(object sender, StoppedEventArgs e)
{
if (waveSource != null)
{
waveSource.Dispose();
waveSource = null;
}
if (waveFile != null)
{
waveFile.Dispose();
waveFile = null;
}
}
private void Button_Click(object sender, RoutedEventArgs e)
{
StartBtn_Click();
}
private void Button_Click_1(object sender, RoutedEventArgs e)
{
waveSource.StopRecording();
}
}
class SpeechStreamer : Stream
{
private AutoResetEvent _writeEvent;
private List<byte> _buffer;
private int _buffersize;
private int _readposition;
private int _writeposition;
private bool _reset;
public SpeechStreamer(int bufferSize)
{
_writeEvent = new AutoResetEvent(false);
_buffersize = bufferSize;
_buffer = new List<byte>(_buffersize);
for (int i = 0; i < _buffersize; i++)
_buffer.Add(new byte());
_readposition = 0;
_writeposition = 0;
}
public override bool CanRead
{
get { return true; }
}
public override bool CanSeek
{
get { return false; }
}
public override bool CanWrite
{
get { return true; }
}
public override long Length
{
get { return -1L; }
}
public override long Position
{
get { return 0L; }
set { }
}
public override long Seek(long offset, SeekOrigin origin)
{
return 0L;
}
public override void SetLength(long value)
{
}
public override int Read(byte[] buffer, int offset, int count)
{
int i = 0;
while (i < count && _writeEvent != null)
{
if (!_reset && _readposition >= _writeposition)
{
_writeEvent.WaitOne(100, true);
continue;
}
buffer[i] = _buffer[_readposition + offset];
_readposition++;
if (_readposition == _buffersize)
{
_readposition = 0;
_reset = false;
}
i++;
}
return count;
}
public override void Write(byte[] buffer, int offset, int count)
{
for (int i = offset; i < offset + count; i++)
{
_buffer[_writeposition] = buffer[i];
_writeposition++;
if (_writeposition == _buffersize)
{
_writeposition = 0;
_reset = true;
}
}
_writeEvent.Set();
}
public override void Close()
{
_writeEvent.Close();
_writeEvent = null;
base.Close();
}
public override void Flush()
{
}
}
}
stream = new SpeechStreamer(e.Buffer.Length);
stream.Write(e.Buffer, 0, e.BytesRecorded);
这真的是唯一写入流的地方，应用程序中没有其他地方吗？如果它在初始化时只写一些字节，它将不会继续使音频进入识别器。