https://github.com/jimm98y/sharpjaad

SharpJaad is an AAC decoder and MP4 demultiplexer library written completely in C#. It uses no native libraries, is platform-independent and portable. It can read MP4 container from a stream and decode AAC-LC (Low Complexity) and HE-AAC (High Efficiency/AAC+). Ported into C# (netstandard2.0) from: sourceforge.net/projects/jaadec
https://github.com/jimm98y/sharpjaad

aac audio-processing codec decoder netstandard

Last synced: 22 days ago
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SharpJaad is an AAC decoder and MP4 demultiplexer library written completely in C#. It uses no native libraries, is platform-independent and portable. It can read MP4 container from a stream and decode AAC-LC (Low Complexity) and HE-AAC (High Efficiency/AAC+). Ported into C# (netstandard2.0) from: sourceforge.net/projects/jaadec

• Host: GitHub
• URL: https://github.com/jimm98y/sharpjaad
• Owner: jimm98y
• License: mit
• Created: 2023-04-25T20:50:44.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-01-16T23:08:27.000Z (10 months ago)
• Last Synced: 2024-09-15T10:14:44.622Z (2 months ago)
• Topics: aac, audio-processing, codec, decoder, netstandard
• Language: C#
• Homepage:
• Size: 441 KB
• Stars: 4
• Watchers: 1
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# SharpJaad

JAAD is an AAC decoder and MP4 demultiplexer library written completely in Java. It uses no native libraries, is platform-independent and portable. It can read MP4 container from almost every input-stream (files, network sockets etc.) and decode AAC-LC (Low Complexity) and HE-AAC (High Efficiency/AAC+).

SharpJaad is a netstandard2.0 port of the original Java code base with a few small fixes. It has no third-party dependencies and it's portable as it does not use any platform-specific APIs.

## SharpJaad.AAC

SharpJaad.AAC is just the AAC decoder without any MP4 code. It's well suited for applications in RTP where the MP4 container is not needed.

### Example

To decode stereo AAC Low Complexity (AAC-LC) with 44.1kHz, start with creating the configuration:

```cs

var decoderConfig = new DecoderConfig();

decoderConfig.SetProfile(Profile.AAC_LC);

decoderConfig.SetSampleFrequency(SampleFrequency.SAMPLE_FREQUENCY_44100);

decoderConfig.SetChannelConfiguration((ChannelConfiguration)2);

```

Create the decoder:

```cs

var aacDecoder = new Decoder(decoderConfig);

```

Create an output buffer for the result:

```cs

SampleBuffer buffer = new SampleBuffer();

buffer.SetBigEndian(false);

```

Decode the AAC frame:

```cs

byte[] aacFrame = { ... } // AAC frame to decode

aacDecoder.DecodeFrame(aacFrame, buffer);

```

Convert it to PCM:

```cs

short[] pcm = new short[buffer.Data.Length / sizeof(short)];

Buffer.BlockCopy(buffer.Data, 0, pcm, 0, buffer.Data.Length);

```

## SharpJaadMain

A sample application that can extract AAC audio from a (MP4) file and transcode it into a WAV file.

## Credits

This is a port of the https://sourceforge.net/projects/jaadec/ into C#.