DrAbc.SilkCodec.NAudio

SilkCodec.NET.NAudio

NAudio extensions for SilkCodec.NET. Convert any NAudio-readable audio format to Silk v3, and decode Silk v3 to WAV, PCM, MP3, AAC/M4A, WMA or FLAC.

Windows only (net10.0-windows). Compressed formats use Media Foundation.

Install

dotnet add package SilkCodec.NET.NAudio

Encode

using SilkCodec.NET;
using SilkCodec.NET.NAudio;
using NAudio.Wave;

var encoder = new SilkEncoder(new SilkEncoderOptions
{
    SampleRate = 24000,
    BitRate = 25000,
    Tencent = true
});

byte[] silk = encoder.EncodeFile("voice.mp3");
encoder.EncodeFile("voice.wav", "voice.silk");

using var reader = new AudioFileReader("voice.m4a");
byte[] fromReader = encoder.Encode(reader);
byte[] fromProvider = ((IWaveProvider)reader).ToSilk(encoder.Options);

.pcm, .raw and .s16le files are treated as signed 16-bit little-endian mono at encoder.Options.SampleRate.

Decode

var decoder = new SilkDecoder(new SilkDecoderOptions { SampleRate = 24000 });

decoder.DecodeFile("voice.silk", "voice.wav");
decoder.DecodeFile("voice.silk", "voice.mp3");
byte[] wav = decoder.DecodeToWav(File.ReadAllBytes("voice.silk"));

using RawSourceWaveStream wave = decoder.DecodeToWaveStream(File.ReadAllBytes("voice.silk"));

Output format is inferred from the file extension: .wav, .pcm/.raw/.s16le, .mp3, .m4a/.aac/.mp4, .wma, .flac.

MP3, AAC and WMA encoding may resample to 44.1 kHz because Windows Media Foundation often rejects 24 kHz mono.

License

MIT (Expat), see the repository LICENSE.