OfflineTts.cs
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/// Copyright (c) 2024.5 by 东风破
using System;
using System.Runtime.InteropServices;
using System.Text;
namespace SherpaOnnx
{
// IntPtr is actually a `const float*` from C++
public delegate int OfflineTtsCallback(IntPtr samples, int n);
public delegate int OfflineTtsCallbackProgress(IntPtr samples, int n, float progress);
public class OfflineTts : IDisposable
{
public OfflineTts(OfflineTtsConfig config)
{
IntPtr h = SherpaOnnxCreateOfflineTts(ref config);
_handle = new HandleRef(this, h);
}
public OfflineTtsGeneratedAudio Generate(String text, float speed, int speakerId)
{
byte[] utf8Bytes = Encoding.UTF8.GetBytes(text);
byte[] utf8BytesWithNull = new byte[utf8Bytes.Length + 1]; // +1 for null terminator
Array.Copy(utf8Bytes, utf8BytesWithNull, utf8Bytes.Length);
utf8BytesWithNull[utf8Bytes.Length] = 0; // Null terminator
IntPtr p = SherpaOnnxOfflineTtsGenerate(_handle.Handle, utf8BytesWithNull, speakerId, speed);
return new OfflineTtsGeneratedAudio(p);
}
public OfflineTtsGeneratedAudio GenerateWithCallback(String text, float speed, int speakerId, OfflineTtsCallback callback)
{
byte[] utf8Bytes = Encoding.UTF8.GetBytes(text);
byte[] utf8BytesWithNull = new byte[utf8Bytes.Length + 1]; // +1 for null terminator
Array.Copy(utf8Bytes, utf8BytesWithNull, utf8Bytes.Length);
utf8BytesWithNull[utf8Bytes.Length] = 0; // Null terminator
IntPtr p = SherpaOnnxOfflineTtsGenerateWithCallback(_handle.Handle, utf8BytesWithNull, speakerId, speed, callback);
return new OfflineTtsGeneratedAudio(p);
}
public OfflineTtsGeneratedAudio GenerateWithCallbackProgress(String text, float speed, int speakerId, OfflineTtsCallbackProgress callback)
{
byte[] utf8Bytes = Encoding.UTF8.GetBytes(text);
byte[] utf8BytesWithNull = new byte[utf8Bytes.Length + 1]; // +1 for null terminator
Array.Copy(utf8Bytes, utf8BytesWithNull, utf8Bytes.Length);
utf8BytesWithNull[utf8Bytes.Length] = 0; // Null terminator
IntPtr p = SherpaOnnxOfflineTtsGenerateWithProgressCallback(_handle.Handle, utf8BytesWithNull, speakerId, speed, callback);
return new OfflineTtsGeneratedAudio(p);
}
public void Dispose()
{
Cleanup();
// Prevent the object from being placed on the
// finalization queue
System.GC.SuppressFinalize(this);
}
~OfflineTts()
{
Cleanup();
}
private void Cleanup()
{
SherpaOnnxDestroyOfflineTts(_handle.Handle);
// Don't permit the handle to be used again.
_handle = new HandleRef(this, IntPtr.Zero);
}
private HandleRef _handle;
public int SampleRate
{
get
{
return SherpaOnnxOfflineTtsSampleRate(_handle.Handle);
}
}
public int NumSpeakers
{
get
{
return SherpaOnnxOfflineTtsNumSpeakers(_handle.Handle);
}
}
[DllImport(Dll.Filename)]
private static extern IntPtr SherpaOnnxCreateOfflineTts(ref OfflineTtsConfig config);
[DllImport(Dll.Filename)]
private static extern void SherpaOnnxDestroyOfflineTts(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern int SherpaOnnxOfflineTtsSampleRate(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern int SherpaOnnxOfflineTtsNumSpeakers(IntPtr handle);
[DllImport(Dll.Filename)]
private static extern IntPtr SherpaOnnxOfflineTtsGenerate(IntPtr handle, [MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.I1)] byte[] utf8Text, int sid, float speed);
[DllImport(Dll.Filename, CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr SherpaOnnxOfflineTtsGenerateWithCallback(IntPtr handle, [MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.I1)] byte[] utf8Text, int sid, float speed, OfflineTtsCallback callback);
[DllImport(Dll.Filename, CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr SherpaOnnxOfflineTtsGenerateWithProgressCallback(IntPtr handle, [MarshalAs(UnmanagedType.LPArray, ArraySubType = UnmanagedType.I1)] byte[] utf8Text, int sid, float speed, OfflineTtsCallbackProgress callback);
}
}