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lib/views/audio_mediakit.dart

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+import 'package:just_audio_media_kit/just_audio_media_kit.dart';
+
+class AudioInitializer {
+  void audioInit() {
+    JustAudioMediaKit.ensureInitialized();
+  }
+}

lib/views/audio_none.dart

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+class AudioInitializer {
+  void audioInit() {}
+}

lib/views/audio_web.dart

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+class AudioInitializer {
+  void audioInit() {}
+}

lib/views/play.dart

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+import 'package:flutter/services.dart';
+import 'package:just_audio/just_audio.dart' as justaudio;
+import 'audio_none.dart'
+    if (dart.library.io) 'audio_mediakit.dart'
+    if (dart.library.html) 'audio_web.dart';
+//import 'package:audioplayers/audioplayers.dart' as auplay;
+//import 'dart:io' show Platform;
+
+import '../pb/stillbox.pb.dart';
+
+abstract class AudioDriver {
+  Future<void> play(Call call);
+  Stream<justaudio.PlayerState> get playerStateStream;
+}
+
+class Player {
+  late AudioDriver driver;
+  Player() {
+//    if (Platform.isMacOS || Platform.isIOS) {
+    driver = JustAudioDriver();
+//    } else {
+//      driver = AudioPlayersDriver();
+//    }
+  }
+
+  Future<void> play(Call call) async {
+    await driver.play(call);
+  }
+}
+
+/*
+class AudioPlayersDriver implements AudioDriver {
+  final player = auplay.AudioPlayer();
+
+  @override
+  Future<void> play(Call call) {
+    return player.play(auplay.BytesSource(Uint8List.fromList(call.audio)));
+  }
+}
+*/
+
+class JustAudioDriver implements AudioDriver {
+  final player = justaudio.AudioPlayer();
+  final initializer = AudioInitializer();
+
+  JustAudioDriver() {
+    initializer.audioInit();
+  }
+
+  @override
+  Stream<justaudio.PlayerState> get playerStateStream {
+    return player.playerStateStream;
+  }
+
+  @override
+  Future<void> play(Call call) async {
+    player.setAudioSource(CallBytesSource(call));
+    await player.play();
+  }
+}
+
+class CallBytesSource extends justaudio.StreamAudioSource {
+  late Uint8List _buffer;
+  final Call _call;
+
+  factory CallBytesSource(Call call) {
+    return CallBytesSource._(call, Uint8List.fromList(call.audio));
+  }
+
+  CallBytesSource._(this._call, this._buffer) : super(tag: 'CallBytesSource');
+
+  @override
+  Future<justaudio.StreamAudioResponse> request([int? start, int? end]) async {
+    // Returning the stream audio response with the parameters
+    return justaudio.StreamAudioResponse(
+      sourceLength: _buffer.length,
+      contentLength: (end ?? _buffer.length) - (start ?? 0),
+      offset: start ?? 0,
+      stream: Stream.fromIterable([_buffer.sublist(start ?? 0, end)]),
+      contentType: _call.audioType,
+    );
+  }
+}