AirPlay Receiver for Windows

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Open-source AirPlay 2 receiver for Windows, supporting screen mirroring (with audio) and audio streaming from Apple devices. Built with C# and .NET 8.

Features

• Screen Mirroring — Mirror your iPhone/iPad/Mac screen to Windows with H.264 video and AAC-ELD audio
• Auto Video Display — Video player (ffplay) launches automatically when mirroring starts and closes when mirroring stops. Supports repeated connections without restarting the application.
• Audio Streaming — Play music and podcasts via AirPlay (ALAC and AAC codecs)
• Volume Control — Remote volume adjustment from your Apple device
• Auto-Discovery — Bonjour/mDNS service advertising, your Windows PC appears as an AirPlay receiver automatically

Quick Start

Download

Download the latest release from GitHub Releases. The package includes all required dependencies (FFmpeg, libfdk-aac).

Usage

1. Extract the downloaded package
2. Run the application
3. On your Apple device, open Control Center → Screen Mirroring → select your PC
4. The mirroring window will appear automatically — no manual setup needed!

Note: For audio-only streaming (e.g., music), simply select your PC as the AirPlay output device from any audio app on your Apple device.

Build from Source

Prerequisites

• .NET 8.0 SDK or later
• FFmpeg — ffplay.exe in the application directory or PATH
• libfdk-aac — libfdk-aac-2.dll in the application directory (required for screen mirroring audio)

Build

dotnet restore AirPlay.sln
dotnet build AirPlay.sln --configuration Release

Run

1. Start the application
2. On your Apple device, open Control Center → Screen Mirroring → select your PC
3. The mirroring video window (ffplay) will launch automatically

Fallback: If ffplay is not found, you can manually open a video player:

ffplay -f h264 -probesize 32768 -analyzeduration 0 -fflags nobuffer+discardcorrupt -flags low_delay -framedrop -avioflags direct -vf setpts=0 \\.\pipe\AirPlayVideo

Building libfdk-aac on Windows

The libfdk-aac-2.dll is required for decoding AAC-ELD audio during screen mirroring. You can build it from source:

1. Install MSYS2
2. Open MSYS2 MinGW 64-bit terminal and run:

   pacman -S mingw-w64-x86_64-gcc mingw-w64-x86_64-cmake make
   git clone https://github.com/mstorsjo/fdk-aac.git
   cd fdk-aac
   mkdir build && cd build
   cmake -G "MinGW Makefiles" -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON ..
   cmake --build .

3. Copy the resulting libfdk-aac-2.dll to the application directory

Architecture

Apple Device ──AirPlay──► AirPlay Receiver (.NET 8)
                              │
                    ┌─────────┼─────────┐
                    ▼         ▼         ▼
              Screen Mirror  Audio    Volume
              (H.264+AAC)   (ALAC)   Control
                    │         │
              ┌─────┴───┐    │
              ▼         ▼    ▼
          ffplay     FDK-AAC  NAudio
        (auto-launch) Decoder  DirectSound

• Video: H.264 stream written to a named pipe, ffplay is auto-launched to display the mirroring window when a device connects
• Mirroring Audio: AAC-ELD decoded by native FDK-AAC library via P/Invoke, output through NAudio DirectSound
• Streaming Audio: ALAC/AAC decoded and output through NAudio DirectSound

Credits

Based on open-source AirPlay protocol implementations. Special thanks to:

• SteeBono/airplayreceiver — Original C# AirPlay receiver
• UxPlay — AirPlay protocol reference
• mstorsjo/fdk-aac — FDK-AAC codec library

Disclaimer

All resources in this repository are written using only open-source projects. The code and related resources are meant for educational purposes only. The author does not take any responsibility for the use that will be made of it.

License

MIT License