VoiceActivityDetector.cs
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/// Copyright (c) 2024 Xiaomi Corporation (authors: Fangjun Kuang)
using System;
using System.Runtime.InteropServices;
namespace SherpaOnnx
{
public class VoiceActivityDetector : IDisposable
{
public VoiceActivityDetector(VadModelConfig config, float bufferSizeInSeconds)
{
IntPtr h = SherpaOnnxCreateVoiceActivityDetector(ref config, bufferSizeInSeconds);
_handle = new HandleRef(this, h);
}
public void AcceptWaveform(float[] samples)
{
SherpaOnnxVoiceActivityDetectorAcceptWaveform(_handle.Handle, samples, samples.Length);
}
public bool IsEmpty()
{
return SherpaOnnxVoiceActivityDetectorEmpty(_handle.Handle) == 1;
}
public bool IsSpeechDetected()
{
return SherpaOnnxVoiceActivityDetectorDetected(_handle.Handle) == 1;
}
public void Pop()
{
SherpaOnnxVoiceActivityDetectorPop(_handle.Handle);
}
public SpeechSegment Front()
{
IntPtr p = SherpaOnnxVoiceActivityDetectorFront(_handle.Handle);
SpeechSegment segment = new SpeechSegment(p);
SherpaOnnxDestroySpeechSegment(p);
return segment;
}
public void Clear()
{
SherpaOnnxVoiceActivityDetectorClear(_handle.Handle);
}
public void Reset()
{
SherpaOnnxVoiceActivityDetectorReset(_handle.Handle);
}
public void Flush()
{
SherpaOnnxVoiceActivityDetectorFlush(_handle.Handle);
}
public void Dispose()
{
Cleanup();
// Prevent the object from being placed on the
// finalization queue
System.GC.SuppressFinalize(this);
}
~VoiceActivityDetector()
{
Cleanup();
}
private void Cleanup()
{
SherpaOnnxDestroyVoiceActivityDetector(_handle.Handle);
// Don't permit the handle to be used again.
_handle = new HandleRef(this, IntPtr.Zero);
}
private HandleRef _handle;
[DllImport(Dll.Filename)]
private static extern IntPtr SherpaOnnxCreateVoiceActivityDetector(ref VadModelConfig config, float bufferSizeInSeconds);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxDestroyVoiceActivityDetector(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxVoiceActivityDetectorAcceptWaveform(IntPtr handle, float[] samples, int n);
[DllImport(Dll.Filename)]
private static extern int SherpaOnnxVoiceActivityDetectorEmpty(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern int SherpaOnnxVoiceActivityDetectorDetected(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxVoiceActivityDetectorPop(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxVoiceActivityDetectorClear(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern IntPtr SherpaOnnxVoiceActivityDetectorFront(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxDestroySpeechSegment(IntPtr segment);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxVoiceActivityDetectorReset(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxVoiceActivityDetectorFlush(IntPtr handle);
}
}