Lightweight iOS and OSX audio engine with opus, flac, cue, mp3, m4a, m3u support.

Supported formats

Audio sources: http and local files
Audio files: opus, flac, mp3, m4a, wav and other from CoreAudio
Playlists: cue, m3u

Features

Ligthweight: 300kb compiled, 1.2mb with libFLAC
Small memory foorprint: no more than 2.5mb for the flac files
Low resource consumption: about 14% CPU usage for FLAC on ipod 4g
All operations in background with GCD
Event-based (using dispatch sources and CoreAudio async api)
Provides full audio metadata (vorbis, id3 tags) with embeeded cover images
HTTP data caching
Tested (currently about 85% code coverage)

Overview

Static library and cocoapods podspec provided. Static library can be compiled with embeeded FLAC library (check project targets). For OSX you can use static framework.

Start playback:

self.player = [[ORGMEngine alloc] init];
NSURL* url = [NSURL URLWithString:tfUrl.text];
[_player playUrl:url];

Common operations:

[_player metadata];                         // current metadata
[_player pause];                            // pause playback
[_player resume];                           // resume playback
[_player stop];                             // stop playback
[_player seekToTime:seekSlider.value];      // seek to second
[_player setNextUrl:url withDataFlush:YES]; // play next track and clear current buffer

Delegate methods:

- (NSURL*)engineExpectsNextUrl:(ORGMEngine*)engine; // provides continious playback
- (void)engine:(ORGMEngine*)engine didChangeState:(ORGMEngineState)state; // state change callback

Check example project and tests for the additional information.

Documentation

Project headers contain appledoc comments, precompiled docset here.

Tests

OCUnit tests included into the project.

Credits

http://cogx.org/ by Vincent Spader. FLAC decoder implementation based on Cog sources

License

(MIT license)

License

ap4y/OrigamiEngine

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