style: auto-format using flutter's format tool

Author: anarchuser

lib/mic_stream.dart

@@ -7,9 +7,21 @@ import 'package:flutter/services.dart';
 // In reference to the implementation of the official sensors plugin
 // https://github.com/flutter/plugins/tree/master/packages/sensors
 
-enum AudioSource {DEFAULT, MIC, VOICE_UPLINK, VOICE_DOWNLINK, VOICE_CALL, CAMCORDER, VOICE_RECOGNITION, VOICE_COMMUNICATION, REMOTE_SUBMIX, UNPROCESSED, VOICE_PERFORMANCE}
-enum ChannelConfig {CHANNEL_IN_MONO, CHANNEL_IN_STEREO}
-enum AudioFormat {ENCODING_PCM_8BIT, ENCODING_PCM_16BIT}
+enum AudioSource {
+  DEFAULT,
+  MIC,
+  VOICE_UPLINK,
+  VOICE_DOWNLINK,
+  VOICE_CALL,
+  CAMCORDER,
+  VOICE_RECOGNITION,
+  VOICE_COMMUNICATION,
+  REMOTE_SUBMIX,
+  UNPROCESSED,
+  VOICE_PERFORMANCE
+}
+enum ChannelConfig { CHANNEL_IN_MONO, CHANNEL_IN_STEREO }
+enum AudioFormat { ENCODING_PCM_8BIT, ENCODING_PCM_16BIT }
 
 const AudioSource _DEFAULT_AUDIO_SOURCE = AudioSource.DEFAULT;
 const ChannelConfig _DEFAULT_CHANNELS_CONFIG = ChannelConfig.CHANNEL_IN_MONO;
@@ -19,15 +31,21 @@ const int _DEFAULT_SAMPLE_RATE = 16000;
 const int _MIN_SAMPLE_RATE = 1;
 const int _MAX_SAMPLE_RATE = 100000;
 
-const EventChannel _microphoneEventChannel = EventChannel('aaron.code.com/mic_stream');
+const EventChannel _microphoneEventChannel =
+    EventChannel('aaron.code.com/mic_stream');
 
 Permissions _permission;
 Stream<dynamic> _microphone;
 
 // This function manages the permission and ensures you're allowed to record audio
 Future<bool> get permissionStatus async {
-  _permission = (await Permission.getPermissionsStatus([PermissionName.Microphone])).first;
-  if (_permission.permissionStatus != PermissionStatus.allow) _permission = (await Permission.requestPermissions([PermissionName.Microphone])).first;
+  _permission =
+      (await Permission.getPermissionsStatus([PermissionName.Microphone]))
+          .first;
+  if (_permission.permissionStatus != PermissionStatus.allow)
+    _permission =
+        (await Permission.requestPermissions([PermissionName.Microphone]))
+            .first;
   return (_permission.permissionStatus == PermissionStatus.allow);
 }
 
@@ -37,12 +55,26 @@ Future<bool> get permissionStatus async {
 /// sampleRate:      The amount of samples per second. More samples give better quality at the cost of higher data transmission
 /// channelConfig:   States whether audio is mono or stereo
 /// audioFormat:     Switch between 8- and 16-bit PCM streams
-Stream<List<int>> microphone({AudioSource audioSource: _DEFAULT_AUDIO_SOURCE, int sampleRate: _DEFAULT_SAMPLE_RATE, ChannelConfig channelConfig: _DEFAULT_CHANNELS_CONFIG, AudioFormat audioFormat: _DEFAULT_AUDIO_FORMAT}) async* {
-  if (sampleRate < _MIN_SAMPLE_RATE || sampleRate > _MAX_SAMPLE_RATE) throw (RangeError.range(sampleRate, _MIN_SAMPLE_RATE, _MAX_SAMPLE_RATE));
+Stream<List<int>> microphone(
+    {AudioSource audioSource: _DEFAULT_AUDIO_SOURCE,
+    int sampleRate: _DEFAULT_SAMPLE_RATE,
+    ChannelConfig channelConfig: _DEFAULT_CHANNELS_CONFIG,
+    AudioFormat audioFormat: _DEFAULT_AUDIO_FORMAT}) async* {
+  if (sampleRate < _MIN_SAMPLE_RATE || sampleRate > _MAX_SAMPLE_RATE)
+    throw (RangeError.range(sampleRate, _MIN_SAMPLE_RATE, _MAX_SAMPLE_RATE));
   if (!(await permissionStatus)) throw (PlatformException);
-  if (_microphone == null) _microphone = _microphoneEventChannel
-      .receiveBroadcastStream([audioSource.index, sampleRate, channelConfig == ChannelConfig.CHANNEL_IN_MONO ? 16 : 12, audioFormat == AudioFormat.ENCODING_PCM_8BIT ? 3 : 2]);
-  yield* (audioFormat == AudioFormat.ENCODING_PCM_8BIT) ? _parseStream(_microphone) : _squashStream(_microphone);
+
+  if (_microphone == null)
+    _microphone = _microphoneEventChannel.receiveBroadcastStream([
+      audioSource.index,
+      sampleRate,
+      channelConfig == ChannelConfig.CHANNEL_IN_MONO ? 16 : 12,
+      audioFormat == AudioFormat.ENCODING_PCM_8BIT ? 3 : 2
+    ]);
+
+  yield* (audioFormat == AudioFormat.ENCODING_PCM_8BIT)
+      ? _parseStream(_microphone)
+      : _squashStream(_microphone);
 }
 
 // I'm getting a weird stream (_BroadcastStream<dynamic>), so to work with this, I cast it to Stream<List<int>>
@@ -58,7 +90,6 @@ List<int> _parseList(var samples) {
   return sampleList;
 }
 
-
 // The following is needed for 16bit PCM transmission, as I can only transmit byte arrays from java to dart
 // This function then squashes two bytes together to one short
 Stream<List<int>> _squashStream(Stream audio) {
@@ -73,8 +104,7 @@ List<int> _squashList(var byteSamples) {
   for (var sample in byteSamples) {
     if (isFirstElement) {
       sum += sample * 256;
-    }
-    else {
+    } else {
       sum += sample;
       shortSamples.add(sum - 32767);
       sum = 0;