Audio Multiplexer And Transcoder

The avmuxer package provides functionality to manage multiple Opus and G711 audio streams, decode Opus/G711 data to PCM, interleave and multiplex PCM data, and re-encode the multiplexed PCM data back to Opus format. This is useful for real-time audio mixing, VoIP applications, and multi-participant audio conferencing systems.

Features

• Manage Multiple Audio Streams: Add and handle multiple Opus and G711 audio streams, each with its own decoder and buffer.
• Decode Opus/G711 Data: Convert Opus-encoded data to PCM (Pulse Code Modulation) format.
• Multiplex Audio Streams: Interleave and combine PCM data from multiple streams into a single output.
• Encode PCM to Opus/G711: Convert the combined PCM data back into Opus/G711-encoded format for efficient transmission or storage.

Usage

Creating an Multiplexer

multiplexer, err := NewMultiplexer()
if err != nil {
    log.Fatalf("Failed to create multiplexer: %v", err)
}

Reading PCM data

pcmData := multiplexer.ReadPCM16()
if len(pcmData) == 0 {
    log.Println("No PCM data available")
}

Reading Opus Data

buf:=make([]byte, 2048)
n, err := multiplexer.Read(buf)
if err != nil {
    log.Fatalf("Failed to read Opus bytes: %v", err)
}
if n == 0 {
    log.Println("No Opus data available")
}

Testing

A comprehensive test suite is provided to ensure the end-to-end functionality of the multiplexer, including decoding, multiplexing, and re-encoding audio data. To run the tests, use the following command:

go test ./...

License

This project is licensed under the MIT License. See the LICENSE file for details.

Contributing

Contributions are welcome! Please open an issue or submit a pull request on GitHub.