Custom WebRTC Acoustic Echo Canceller (AEC)

This repository contains a generic custom implementation of the WebRTC-based Acoustic Echo Canceller (AEC) that is cross-platform compatible.

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Getting Started

High performance audio apps typically require more functionality than the simple ability to play or record sound. They demand responsive realtime system behavior. Webrtc provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs.

For Compilation and Building the WebRTC Library for Android, you should have to look into this refernce:

• Compile_WebRTC_Library_For_Android

For real-time Communication and AudioProcessing in Android, I will recommend you to must visit these refernces:

• Android_Realtime_Communication_Using_WebRTC
• Android-Native-Development-For-WebRTC

WebRTC supports (Audio Microphone Collection), (Encoding), and (RTP packet transmission). Features of Audio Data that Webrtc-APM accepts only include;

• 16-bit linear PCM Audio Data.
• 160-frames of 10 ms. (Optimal Sample Rate)
• One or Multiple channels should be interleaved.

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Overview

The Custom AEC module provides a simple interface with two primary functions for processing near-end and far-end audio signals. This enables the user to obtain a processed near-end signal that has reduced echo, suitable for high-quality audio communication applications.

Usage

Desktop

To integrate this custom AEC into a desktop application:

1. Add the custom_acoustic_echo_canceller.h and custom_acoustic_echo_canceller.cc files into the webrtc/src/audio_processing/ directory of the WebRTC codebase.
2. Update the BUILD.gn file associated with the directory to include these new files in the build.
3. Include custom_acoustic_echo_canceller.h in your project similar to how it's done in the provided main.cpp file.

Android

For Android integration:

1. Place the custom_acoustic_echo_canceller.h and custom_acoustic_echo_canceller.cc files into webrtc/src/sdk/android/src/jni/audio_device/.
2. Add a reference to these files in the webrtc/src/sdk/android/BUILD.gn to include them in the build.
3. Build the custom JNI wrapper as part of the WebRTC Android build process.

iOS

For iOS integration:

1. Place the custom_acoustic_echo_canceller.h and custom_acoustic_echo_canceller.cc files into webrtc/src/sdk/objc/native/src/audio/.
2. Add a reference to these files in the webrtc/src/sdk/BUILD.gn to include them in the build.
3. Compile the WebRTC codebase for iOS and build Objective-C wrappers as necessary.

Example

An example main.cpp file is provided to demonstrate the basic usage of the Custom AEC module. It illustrates how to read audio files, process them through the AEC, and write the output.

Contributions

Contributions to this project are welcome. Please ensure that any pull requests are tested across the supported platforms