LightCodec - Lightweight ATRAC3/AT3plus/MP3/AAC decoder for .NET

LightCodec is a lightweight ATRAC3/AT3plus/MP3/AAC audio decoder for .NET, designed to work without external dependencies like FFmpeg.

The decoding output has only minimal LSB (Least Significant Bit) differences compared to FFmpeg (tested with 6Mb audio samples), with no perceptible audio distinction.

Features

• Decode ATRAC3/AT3plus/MP3/AAC audio formats
• Decode H264 video format
• Pure C# implementation with no external dependencies
• No FFmpeg or native libraries required

Installation

NuGet

dotnet add package LightCodec

Related Projects

• ScePSP: A PSP emulator project that uses this decoder

Demo

• Demo Project

Usage Example

using Lightcodec;
ILightCodec codec;
byte[] data = new byte[Format.BytesPerFrame];
short[] audioBuf = new short[8192];
codec = CodecFactory.Get(AudioCodec.AT3plus);
codec.init(Format.BytesPerFrame, Format.Channels, Format.Channels, 0);
while (!DataStream.Eof())
{
    DataStream.Read(data, 0, Format.BytesPerFrame);
    int len = 0;
    fixed (byte* ptr = data)
    {
        fixed (short* outPtr = audioBuf)
        {
            int result = codec.decode(ptr, Format.BytesPerFrame, outPtr, out len);
        }
    }
}

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the GPL-2.0 license.