223 lines
6.9 KiB
Markdown
223 lines
6.9 KiB
Markdown
# just_audio
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This Flutter plugin plays audio from URLs, files, assets, DASH/HLS streams and playlists. Furthermore, it can clip, concatenate, loop, shuffle and compose audio into complex arrangements with gapless playback. This plugin can be used with [audio_service](https://pub.dev/packages/audio_service) to play audio in the background and control playback from the lock screen, Android notifications, the iOS Control Center, and headset buttons.
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## Features
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| Feature | Android | iOS | MacOS | Web |
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| ------- | :-------: | :-----: | :-----: | :-----: |
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| read from URL | ✅ | ✅ | ✅ | ✅ |
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| read from file | ✅ | ✅ | ✅ | |
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| read from asset | ✅ | ✅ | ✅ | |
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| request headers | ✅ | ✅ | ✅ | |
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| DASH | ✅ | | | |
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| HLS | ✅ | ✅ | ✅ | |
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| buffer status/position | ✅ | ✅ | ✅ | ✅ |
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| play/pause/seek | ✅ | ✅ | ✅ | ✅ |
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| set volume | ✅ | ✅ | ✅ | ✅ |
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| set speed | ✅ | ✅ | ✅ | ✅ |
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| clip audio | ✅ | ✅ | ✅ | ✅ |
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| playlists | ✅ | ✅ | ✅ | ✅ |
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| looping | ✅ | ✅ | ✅ | ✅ |
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| shuffle | ✅ | ✅ | ✅ | ✅ |
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| compose audio | ✅ | ✅ | ✅ | ✅ |
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| gapless playback | ✅ | ✅ | ✅ | |
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| report player errors | ✅ | ✅ | ✅ | ✅ |
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Please consider reporting any bugs you encounter [here](https://github.com/ryanheise/just_audio/issues) or submitting pull requests [here](https://github.com/ryanheise/just_audio/pulls).
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## Example
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Initialisation:
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```dart
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final player = AudioPlayer();
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var duration = await player.setUrl('https://foo.com/bar.mp3');
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```
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Standard controls:
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```dart
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player.play(); // Usually you don't want to wait for playback to finish.
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await player.seek(Duration(seconds: 10));
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await player.pause();
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```
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Clipping audio:
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```dart
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await player.setClip(start: Duration(seconds: 10), end: Duration(seconds: 20));
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await player.play(); // Waits until the clip has finished playing
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```
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Adjusting audio:
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```dart
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await player.setSpeed(2.0); // Double speed
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await player.setVolume(0.5); // Halve volume
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```
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Gapless playlists:
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```dart
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await player.load(
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ConcatenatingAudioSource(
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children: [
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AudioSource.uri(Uri.parse("https://example.com/track1.mp3")),
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AudioSource.uri(Uri.parse("https://example.com/track2.mp3")),
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AudioSource.uri(Uri.parse("https://example.com/track3.mp3")),
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],
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),
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);
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player.seekToNext();
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player.seekToPrevious();
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// Jump to the beginning of track3.mp3.
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player.seek(Duration(milliseconds: 0), index: 2);
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```
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Looping and shuffling:
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```dart
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player.setLoopMode(LoopMode.off); // no looping (default)
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player.setLoopMode(LoopMode.all); // loop playlist
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player.setLoopMode(LoopMode.one); // loop current item
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player.setShuffleModeEnabled(true); // shuffle except for current item
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```
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Composing audio sources:
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```dart
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player.load(
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// Loop child 4 times
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LoopingAudioSource(
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count: 4,
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// Play children one after the other
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child: ConcatenatingAudioSource(
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children: [
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// Play a regular media file
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ProgressiveAudioSource(Uri.parse("https://example.com/foo.mp3")),
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// Play a DASH stream
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DashAudioSource(Uri.parse("https://example.com/audio.mdp")),
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// Play an HLS stream
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HlsAudioSource(Uri.parse("https://example.com/audio.m3u8")),
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// Play a segment of the child
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ClippingAudioSource(
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child: ProgressiveAudioSource(Uri.parse("https://w.xyz/p.mp3")),
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start: Duration(seconds: 25),
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end: Duration(seconds: 30),
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),
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],
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),
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),
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);
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```
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Releasing resources:
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```dart
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await player.dispose();
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```
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Catching player errors:
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```dart
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try {
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await player.setUrl("https://s3.amazonaws.com/404-file.mp3");
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} catch (e) {
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print("Error: $e");
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}
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```
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Listening to state changes:
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```dart
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player.playerStateStream.listen((state) {
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if (state.playing) ... else ...
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switch (state.processingState) {
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case AudioPlaybackState.none: ...
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case AudioPlaybackState.loading: ...
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case AudioPlaybackState.buffering: ...
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case AudioPlaybackState.ready: ...
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case AudioPlaybackState.completed: ...
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}
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});
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// See also:
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// - durationStream
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// - positionStream
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// - bufferedPositionStream
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// - currentIndexStream
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// - icyMetadataStream
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// - playingStream
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// - processingStateStream
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// - loopModeStream
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// - shuffleModeEnabledStream
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// - volumeStream
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// - speedStream
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// - playbackEventStream
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```
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## Platform specific configuration
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### Android
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If you wish to connect to non-HTTPS URLS, add the following attribute to the `application` element of your `AndroidManifest.xml` file:
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```xml
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<application ... android:usesCleartextTraffic="true">
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```
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### iOS
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If you wish to connect to non-HTTPS URLS, add the following to your `Info.plist` file:
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```xml
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<key>NSAppTransportSecurity</key>
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<dict>
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<key>NSAllowsArbitraryLoads</key>
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<true/>
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<key>NSAllowsArbitraryLoadsForMedia</key>
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<true/>
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</dict>
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```
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By default, iOS will mute your app's audio when your phone is switched to
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silent mode. Depending on the requirements of your app, you can change the
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default audio session category using `AudioPlayer.setIosCategory`. For example,
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if you are writing a media app, Apple recommends that you set the category to
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`AVAudioSessionCategoryPlayback`, which you can achieve by adding the following
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code to your app's initialisation:
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```dart
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AudioPlayer.setIosCategory(IosCategory.playback);
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```
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Note: If your app uses a number of different audio plugins in combination, e.g.
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for audio recording, or text to speech, or background audio, it is possible
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that those plugins may internally override the setting you choose here. You may
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consider asking the developer of each other plugin you use to provide a similar
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method so that you can configure the same audio session category universally
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across all plugins you use.
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### MacOS
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To allow your MacOS application to access audio files on the Internet, add the following to your `DebugProfile.entitlements` and `Release.entitlements` files:
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```xml
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<key>com.apple.security.network.client</key>
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<true/>
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```
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If you wish to connect to non-HTTPS URLS, add the following to your `Info.plist` file:
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```xml
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<key>NSAppTransportSecurity</key>
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<dict>
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<key>NSAllowsArbitraryLoads</key>
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<true/>
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<key>NSAllowsArbitraryLoadsForMedia</key>
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<true/>
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</dict>
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```
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