shortplay

Project Overview

ShortPlay is a Flutter short-drama player that focuses on two things: native DRM decryption and smooth swipe-to-switch playback. It implements an AES-128 CTR decryption core in pure C, shared by Android and iOS, so the player receives already-decrypted plaintext with the hardware decode path unchanged. The playback page also keeps three player instances as a sliding window, cutting the first frame on switch from hundreds of milliseconds to the low hundreds.

Makes decryption invisible and swipe-to-switch nearly seamless.

Key Features

• Native decryption: implements AES-128 and MP4 CENC parsing in pure C with zero third-party dependencies
• Shared across platforms: Android and iOS use the same decryption core
• No disk writes: a producer keeps fetching while a consumer emits plaintext on the player's read rhythm
• Dual integration: Android uses Media3 ExoPlayer, iOS uses AVPlayer
• Sliding window: maintains current, next, and previous player instances at once
• Tiered prewarm: prewarms at full, header-only, and header-plus-data granularity
• Unified interface: the C layer exposes a player-agnostic ABI

Target Audience

• Developers studying mobile streaming decryption
• Developers who need a seamless episode-switch experience
• Teams building playback apps with Flutter
• Engineers working on C and native player integration

Quick Start

1. Make sure Flutter 3.24 or above is installed
2. Clone the repository and fetch dependencies

git clone <repo-url>
cd shortplay
flutter pub get

3. Run on a real device for a closer-to-reality test

flutter run

4. Prerequisites are Flutter 3.24 or above, Android NDK, and Xcode 15 or above

Core Advantages

• Faster switching: the sliding window cuts the first-frame time from hundreds of milliseconds to the low hundreds
• No wasted bandwidth: tiered prewarm only fills data for episodes you might reach
• Invisible decoding: the player receives plaintext, so the hardware decode path is unchanged
• Unified interface: the C-layer ABI is player-agnostic and easy to swap and reuse

System Requirements

Notes

• This project is for learning and technical exchange only and provides no content
• Ensure you have lawful authorization for the interfaces and content you use
• The core algorithms involved are not open source; do not use them for infringement
• Licensed under MIT