EasyAccEncoder.Net

A .net standard AccEncoder, encode PCM(G711,G726,Raw) data To AAC(ADTS).

Wrapped From: https://github.com/EasyDarwin/EasyAACEncoder

Introduction

The C# API encapsulation of the EasyDarwin/EasyAACEncoder.

Built-in AACEncodder P/Invoke engine reference, no need to copy library files to the runtime directory.

Supported Platforms

Windows x64/x86

Linux x64

Composition

This project contains two C# projects, EasyAACEncoder.Net and EasyAACEncoderDemo. Based on .Net Standard 2.1, it can be used with most .NET versions.

EasyAACEncoder.Net

The main class library.

EasyAACEncoderDemo

The demo project.

Demo

Encode From byte[]

static void BufferTest(byte[] inBuffer, AccInitOptions options)
{
    using AccEncoder encoder = new (options);
    var buffSize = 500;
    var fileBuffer = new byte[buffSize];
    var len = inBuffer.Length;
    var idx = 0;
    while (idx < len)
    {
	var (encoded, size) = encoder.Encode(fileBuffer, idx, buffSize);
	if (size < 0)
	    Console.WriteLine("Encode failed.");
	else if (size > 0)
	{
	    Console.WriteLine($"Input {buffSize} bytes, output {size} bytes:\r\n{BitConverter.ToString(encoded, 0, size)}");
	}
	else
	    Console.WriteLine($"Input {buffSize} bytes, no output.");
	idx += buffSize;
    }
}

Encode form file

static void FileTest(string fileName, AudioCodec codec, Rate rate = Rate.Rate40kBits)
{
    Console.WriteLine($"Test {codec} to Acc format.");
    try
    {
	var fn = $"{Path.GetFileNameWithoutExtension(fileName)}.aac";
	using var fo = File.Open(fn, FileMode.Create);

	using AccEncoder encoder =(codec == AudioCodec.G726)?
	    new (rate, 1, 8000, 16):
	    new (codec, 1, 8000, 16);

	using var file = File.OpenRead($"files{Path.DirectorySeparatorChar}{fileName}");
	var buffSize = 500;
	var fileBuffer = new byte[buffSize];

	while (true)
	{
	    var ll = file.Read(fileBuffer, 0, buffSize);
	    var (encoded, size) = encoder.Encode(fileBuffer, 0, buffSize);
	    if (size < 0)
		Console.WriteLine("Encode failed.");
	    else if (size > 0)
	    {
		Console.WriteLine($"Input {buffSize} bytes, output {size} bytes.");
		fo.Write(encoded, 0, size);
	    }
	    else
		Console.WriteLine($"Input {buffSize} bytes, no output.");
	    if (ll < buffSize) break;
	}
	fo.Close();
    }
    catch (Exception ex)
    {
	Console.WriteLine(ex.Message);
    }
}

See Also

EasyAACEncoder

EasyAACEncoder 是EasyDarwin开源流媒体服务团队整理、开发的一款音频转码到AAC的工具库，目前支持G711a/G711u/G726/PCM等音频格式的转码，跨平台，支持Windows（32&64）/Linux（32&64）/ARM各平台；