Low-Level Design of a Music Player Application

Designing a music player application requires careful planning and structuring of components to ensure a seamless and efficient user experience.

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Key Requirements of the Music Player

1. Playback Functionality:

   • Play, pause, stop, and resume songs.
   • Ability to play songs in different formats (e.g., MP3, WAV, AAC).

2. Playlist Management:

   • Create, update, and delete playlists.
   • Add and remove songs from playlists.

3. Search:

   • Search songs by title, artist, or album.

4. Media Controls:

   • Shuffle and repeat modes.
   • Adjust volume.

5. Storage:

   • Store metadata about songs (e.g., title, artist, album, duration).
   • Read from local storage or integrate with online music services.

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System Design Overview

The music player application can be broken down into the following components:

1. Song: Represents a single music track.
2. Playlist: Manages collections of songs.
3. MusicPlayer: Core functionality for playback and media controls.
4. SearchService: Enables searching of songs by metadata.
5. StorageService: Handles the retrieval of songs from storage.

Let’s look at the low-level design and implementation of each component.

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1. Song Class

The Song class represents a single music track with its metadata.

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2. Playlist Class

The Playlist class manages a collection of songs. It allows adding, removing, and fetching songs.

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3. MusicPlayer Class

The MusicPlayer class handles playback functionalities like play, pause, stop, and volume control.

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4. SearchService Class

The SearchService class allows users to search for songs by title, artist, or album.

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5. StorageService Class

The StorageService class simulates reading songs from local storage.

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Example Usage

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Key Takeaways

• Modularity: Each component has a specific responsibility, making the system easy to maintain and extend.
• Scalability: The design can easily integrate new features like streaming from online music libraries.
• User Experience: Supports essential functionalities like playlists, search, and playback.

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