Audio Chat App

This is a peer-to-peer (P2P) audio chat command-line application written in Java. It allows two users to have a real-time audio conversation over a network. The application is designed to be simple and easy to use, while still providing good audio quality.

Features

• Real-time P2P audio communication
• Configurable audio settings
• Cross-platform compatibility (Windows, macOS, Linux)

Getting Started

1. Prerequisites:

   • Java Development Kit (JDK) 8 or later
   • A microphone and speakers

2. Compilation:

   • Open a terminal or command prompt.
   • Navigate to the project directory.
   • Compile the Java files using the following command:

     javac -d bin src/*.java

3. Running the Application:

   • To start the chat:

     java -cp bin AudioChatApp <duration_in_seconds> <destination_IP_address>

     Replace <duration_in_seconds> with the desired duration of the chat and <destination_IP_address> with the IP address of the person you want to chat with.

Code Structure

• AudioChatApp.java: The main class that starts the chat application. It handles the recording and playback of audio, as well as the sending and receiving of audio data over the network.
• PlayApp.java: A simplified version of the application that only plays back audio received from the network.
• PlayingDatagramPacket.java: This class is responsible for playing back audio data received in the form of datagram packets.
• ReceiveDatagramService.java: This class provides a service for receiving datagram packets over the network.
• RecordApp.java: A simplified version of the application that only records audio and sends it over the network.
• RecordToDatagram.java: This class is responsible for recording audio data and converting it into datagram packets.
• SendDatagramService.java: This class provides a service for sending datagram packets over the network.
• SharedConfig.java: This interface defines shared configuration parameters for the application, such as the port number, audio format, and buffer size.
• SoundDevInfo.java: This class provides information about the available audio devices on the system.

Additional Notes

• The application uses UDP for audio transmission, which is a connectionless protocol that is well-suited for real-time audio communication.
• The audio format is set to 16 kHz, 8-bit, mono, which is a common format for voice communication.
• The buffer size is set to 80 ms, which provides a good balance between latency and audio quality.