refactor(server): modularize getFfmpegOptions (#3138)

* refactored `getFfmpegOptions`

refactor transcoding, make separate service

* fixed enum casing

* use `Logger` instead of `console.log`

* review suggestions

* use enum for `getHandler`

* fixed formatting

* Update server/src/domain/media/media.util.ts

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

* Update server/src/domain/media/media.util.ts

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

* More specific imports, renamed codec classes

* simplified code

* removed unused import

* added tests

* added base implementation for bitrate and threads

---------

Co-authored-by: Jason Rasmussen <jrasm91@gmail.com>

mobile/openapi/.openapi-generator/FILES

@@ -29,6 +29,7 @@ doc/AssetIdsDto.md
 doc/AssetIdsResponseDto.md
 doc/AssetResponseDto.md
 doc/AssetTypeEnum.md
+doc/AudioCodec.md
 doc/AuthDeviceResponseDto.md
 doc/AuthenticationApi.md
 doc/ChangePasswordDto.md
@@ -108,6 +109,7 @@ doc/TagResponseDto.md
 doc/TagTypeEnum.md
 doc/ThumbnailFormat.md
 doc/TimeGroupEnum.md
+doc/TranscodePolicy.md
 doc/UpdateAlbumDto.md
 doc/UpdateAssetDto.md
 doc/UpdateTagDto.md
@@ -117,6 +119,7 @@ doc/UserApi.md
 doc/UserCountResponseDto.md
 doc/UserResponseDto.md
 doc/ValidateAccessTokenResponseDto.md
+doc/VideoCodec.md
 git_push.sh
 lib/api.dart
 lib/api/album_api.dart
@@ -164,6 +167,7 @@ lib/model/asset_ids_dto.dart
 lib/model/asset_ids_response_dto.dart
 lib/model/asset_response_dto.dart
 lib/model/asset_type_enum.dart
+lib/model/audio_codec.dart
 lib/model/auth_device_response_dto.dart
 lib/model/change_password_dto.dart
 lib/model/check_duplicate_asset_dto.dart
@@ -233,6 +237,7 @@ lib/model/tag_response_dto.dart
 lib/model/tag_type_enum.dart
 lib/model/thumbnail_format.dart
 lib/model/time_group_enum.dart
+lib/model/transcode_policy.dart
 lib/model/update_album_dto.dart
 lib/model/update_asset_dto.dart
 lib/model/update_tag_dto.dart
@@ -241,6 +246,7 @@ lib/model/usage_by_user_dto.dart
 lib/model/user_count_response_dto.dart
 lib/model/user_response_dto.dart
 lib/model/validate_access_token_response_dto.dart
+lib/model/video_codec.dart
 pubspec.yaml
 test/add_assets_dto_test.dart
 test/add_assets_response_dto_test.dart
@@ -268,6 +274,7 @@ test/asset_ids_dto_test.dart
 test/asset_ids_response_dto_test.dart
 test/asset_response_dto_test.dart
 test/asset_type_enum_test.dart
+test/audio_codec_test.dart
 test/auth_device_response_dto_test.dart
 test/authentication_api_test.dart
 test/change_password_dto_test.dart
@@ -347,6 +354,7 @@ test/tag_response_dto_test.dart
 test/tag_type_enum_test.dart
 test/thumbnail_format_test.dart
 test/time_group_enum_test.dart
+test/transcode_policy_test.dart
 test/update_album_dto_test.dart
 test/update_asset_dto_test.dart
 test/update_tag_dto_test.dart
@@ -356,3 +364,4 @@ test/user_api_test.dart
 test/user_count_response_dto_test.dart
 test/user_response_dto_test.dart
 test/validate_access_token_response_dto_test.dart
+test/video_codec_test.dart

mobile/openapi/README.md

@@ -199,6 +199,7 @@ Class | Method | HTTP request | Description
  - [AssetIdsResponseDto](doc//AssetIdsResponseDto.md)
  - [AssetResponseDto](doc//AssetResponseDto.md)
  - [AssetTypeEnum](doc//AssetTypeEnum.md)
+ - [AudioCodec](doc//AudioCodec.md)
  - [AuthDeviceResponseDto](doc//AuthDeviceResponseDto.md)
  - [ChangePasswordDto](doc//ChangePasswordDto.md)
  - [CheckDuplicateAssetDto](doc//CheckDuplicateAssetDto.md)
@@ -268,6 +269,7 @@ Class | Method | HTTP request | Description
  - [TagTypeEnum](doc//TagTypeEnum.md)
  - [ThumbnailFormat](doc//ThumbnailFormat.md)
  - [TimeGroupEnum](doc//TimeGroupEnum.md)
+ - [TranscodePolicy](doc//TranscodePolicy.md)
  - [UpdateAlbumDto](doc//UpdateAlbumDto.md)
  - [UpdateAssetDto](doc//UpdateAssetDto.md)
  - [UpdateTagDto](doc//UpdateTagDto.md)
@@ -276,6 +278,7 @@ Class | Method | HTTP request | Description
  - [UserCountResponseDto](doc//UserCountResponseDto.md)
  - [UserResponseDto](doc//UserResponseDto.md)
  - [ValidateAccessTokenResponseDto](doc//ValidateAccessTokenResponseDto.md)
+ - [VideoCodec](doc//VideoCodec.md)
 
 
 ## Documentation For Authorization

mobile/openapi/doc/AudioCodec.md

@@ -0,0 +1,14 @@
+# openapi.model.AudioCodec
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

mobile/openapi/doc/SystemConfigFFmpegDto.md

@@ -10,13 +10,13 @@ Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **crf** | **int** |  | 
 **threads** | **int** |  | 
+**targetVideoCodec** | [**VideoCodec**](VideoCodec.md) |  | 
+**targetAudioCodec** | [**AudioCodec**](AudioCodec.md) |  | 
+**transcode** | [**TranscodePolicy**](TranscodePolicy.md) |  | 
 **preset** | **String** |  | 
-**targetVideoCodec** | **String** |  | 
-**targetAudioCodec** | **String** |  | 
 **targetResolution** | **String** |  | 
 **maxBitrate** | **String** |  | 
 **twoPass** | **bool** |  | 
-**transcode** | **String** |  | 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

mobile/openapi/doc/TranscodePolicy.md

@@ -0,0 +1,14 @@
+# openapi.model.TranscodePolicy
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

mobile/openapi/doc/VideoCodec.md

@@ -0,0 +1,14 @@
+# openapi.model.VideoCodec
+
+## Load the model package
+```dart
+import 'package:openapi/api.dart';
+```
+
+## Properties
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
+

mobile/openapi/lib/api.dart

@@ -66,6 +66,7 @@ part 'model/asset_ids_dto.dart';
 part 'model/asset_ids_response_dto.dart';
 part 'model/asset_response_dto.dart';
 part 'model/asset_type_enum.dart';
+part 'model/audio_codec.dart';
 part 'model/auth_device_response_dto.dart';
 part 'model/change_password_dto.dart';
 part 'model/check_duplicate_asset_dto.dart';
@@ -135,6 +136,7 @@ part 'model/tag_response_dto.dart';
 part 'model/tag_type_enum.dart';
 part 'model/thumbnail_format.dart';
 part 'model/time_group_enum.dart';
+part 'model/transcode_policy.dart';
 part 'model/update_album_dto.dart';
 part 'model/update_asset_dto.dart';
 part 'model/update_tag_dto.dart';
@@ -143,6 +145,7 @@ part 'model/usage_by_user_dto.dart';
 part 'model/user_count_response_dto.dart';
 part 'model/user_response_dto.dart';
 part 'model/validate_access_token_response_dto.dart';
+part 'model/video_codec.dart';
 
 
 const _delimiters = {'csv': ',', 'ssv': ' ', 'tsv': '\t', 'pipes': '|'};

mobile/openapi/lib/api_client.dart

@@ -227,6 +227,8 @@ class ApiClient {
           return AssetResponseDto.fromJson(value);
         case 'AssetTypeEnum':
           return AssetTypeEnumTypeTransformer().decode(value);
+        case 'AudioCodec':
+          return AudioCodecTypeTransformer().decode(value);
         case 'AuthDeviceResponseDto':
           return AuthDeviceResponseDto.fromJson(value);
         case 'ChangePasswordDto':
@@ -365,6 +367,8 @@ class ApiClient {
           return ThumbnailFormatTypeTransformer().decode(value);
         case 'TimeGroupEnum':
           return TimeGroupEnumTypeTransformer().decode(value);
+        case 'TranscodePolicy':
+          return TranscodePolicyTypeTransformer().decode(value);
         case 'UpdateAlbumDto':
           return UpdateAlbumDto.fromJson(value);
         case 'UpdateAssetDto':
@@ -381,6 +385,8 @@ class ApiClient {
           return UserResponseDto.fromJson(value);
         case 'ValidateAccessTokenResponseDto':
           return ValidateAccessTokenResponseDto.fromJson(value);
+        case 'VideoCodec':
+          return VideoCodecTypeTransformer().decode(value);
         default:
           dynamic match;
           if (value is List && (match = _regList.firstMatch(targetType)?.group(1)) != null) {

mobile/openapi/lib/api_helper.dart

@@ -58,6 +58,9 @@ String parameterToString(dynamic value) {
   if (value is AssetTypeEnum) {
     return AssetTypeEnumTypeTransformer().encode(value).toString();
   }
+  if (value is AudioCodec) {
+    return AudioCodecTypeTransformer().encode(value).toString();
+  }
   if (value is DeleteAssetStatus) {
     return DeleteAssetStatusTypeTransformer().encode(value).toString();
   }
@@ -79,6 +82,12 @@ String parameterToString(dynamic value) {
   if (value is TimeGroupEnum) {
     return TimeGroupEnumTypeTransformer().encode(value).toString();
   }
+  if (value is TranscodePolicy) {
+    return TranscodePolicyTypeTransformer().encode(value).toString();
+  }
+  if (value is VideoCodec) {
+    return VideoCodecTypeTransformer().encode(value).toString();
+  }
   return value.toString();
 }
 

mobile/openapi/lib/model/audio_codec.dart

@@ -0,0 +1,88 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+
+class AudioCodec {
+  /// Instantiate a new enum with the provided [value].
+  const AudioCodec._(this.value);
+
+  /// The underlying value of this enum member.
+  final String value;
+
+  @override
+  String toString() => value;
+
+  String toJson() => value;
+
+  static const mp3 = AudioCodec._(r'mp3');
+  static const aac = AudioCodec._(r'aac');
+  static const opus = AudioCodec._(r'opus');
+
+  /// List of all possible values in this [enum][AudioCodec].
+  static const values = <AudioCodec>[
+    mp3,
+    aac,
+    opus,
+  ];
+
+  static AudioCodec? fromJson(dynamic value) => AudioCodecTypeTransformer().decode(value);
+
+  static List<AudioCodec>? listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <AudioCodec>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = AudioCodec.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+}
+
+/// Transformation class that can [encode] an instance of [AudioCodec] to String,
+/// and [decode] dynamic data back to [AudioCodec].
+class AudioCodecTypeTransformer {
+  factory AudioCodecTypeTransformer() => _instance ??= const AudioCodecTypeTransformer._();
+
+  const AudioCodecTypeTransformer._();
+
+  String encode(AudioCodec data) => data.value;
+
+  /// Decodes a [dynamic value][data] to a AudioCodec.
+  ///
+  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
+  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
+  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
+  ///
+  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
+  /// and users are still using an old app with the old code.
+  AudioCodec? decode(dynamic data, {bool allowNull = true}) {
+    if (data != null) {
+      switch (data) {
+        case r'mp3': return AudioCodec.mp3;
+        case r'aac': return AudioCodec.aac;
+        case r'opus': return AudioCodec.opus;
+        default:
+          if (!allowNull) {
+            throw ArgumentError('Unknown enum value to decode: $data');
+          }
+      }
+    }
+    return null;
+  }
+
+  /// Singleton [AudioCodecTypeTransformer] instance.
+  static AudioCodecTypeTransformer? _instance;
+}
+

mobile/openapi/lib/model/system_config_f_fmpeg_dto.dart

@@ -15,72 +15,72 @@ class SystemConfigFFmpegDto {
   SystemConfigFFmpegDto({
     required this.crf,
     required this.threads,
-    required this.preset,
     required this.targetVideoCodec,
     required this.targetAudioCodec,
+    required this.transcode,
+    required this.preset,
     required this.targetResolution,
     required this.maxBitrate,
     required this.twoPass,
-    required this.transcode,
   });
 
   int crf;
 
   int threads;
 
+  VideoCodec targetVideoCodec;
+
+  AudioCodec targetAudioCodec;
+
+  TranscodePolicy transcode;
+
   String preset;
 
-  String targetVideoCodec;
-
-  String targetAudioCodec;
-
   String targetResolution;
 
   String maxBitrate;
 
   bool twoPass;
 
-  SystemConfigFFmpegDtoTranscodeEnum transcode;
-
   @override
   bool operator ==(Object other) => identical(this, other) || other is SystemConfigFFmpegDto &&
      other.crf == crf &&
      other.threads == threads &&
-     other.preset == preset &&
      other.targetVideoCodec == targetVideoCodec &&
      other.targetAudioCodec == targetAudioCodec &&
+     other.transcode == transcode &&
+     other.preset == preset &&
      other.targetResolution == targetResolution &&
      other.maxBitrate == maxBitrate &&
-     other.twoPass == twoPass &&
-     other.transcode == transcode;
+     other.twoPass == twoPass;
 
   @override
   int get hashCode =>
     // ignore: unnecessary_parenthesis
     (crf.hashCode) +
     (threads.hashCode) +
-    (preset.hashCode) +
     (targetVideoCodec.hashCode) +
     (targetAudioCodec.hashCode) +
+    (transcode.hashCode) +
+    (preset.hashCode) +
     (targetResolution.hashCode) +
     (maxBitrate.hashCode) +
-    (twoPass.hashCode) +
-    (transcode.hashCode);
+    (twoPass.hashCode);
 
   @override
-  String toString() => 'SystemConfigFFmpegDto[crf=$crf, threads=$threads, preset=$preset, targetVideoCodec=$targetVideoCodec, targetAudioCodec=$targetAudioCodec, targetResolution=$targetResolution, maxBitrate=$maxBitrate, twoPass=$twoPass, transcode=$transcode]';
+  String toString() => 'SystemConfigFFmpegDto[crf=$crf, threads=$threads, targetVideoCodec=$targetVideoCodec, targetAudioCodec=$targetAudioCodec, transcode=$transcode, preset=$preset, targetResolution=$targetResolution, maxBitrate=$maxBitrate, twoPass=$twoPass]';
 
   Map<String, dynamic> toJson() {
     final json = <String, dynamic>{};
       json[r'crf'] = this.crf;
       json[r'threads'] = this.threads;
-      json[r'preset'] = this.preset;
       json[r'targetVideoCodec'] = this.targetVideoCodec;
       json[r'targetAudioCodec'] = this.targetAudioCodec;
+      json[r'transcode'] = this.transcode;
+      json[r'preset'] = this.preset;
       json[r'targetResolution'] = this.targetResolution;
       json[r'maxBitrate'] = this.maxBitrate;
       json[r'twoPass'] = this.twoPass;
-      json[r'transcode'] = this.transcode;
     return json;
   }
 
@@ -94,13 +94,13 @@ class SystemConfigFFmpegDto {
       return SystemConfigFFmpegDto(
         crf: mapValueOfType<int>(json, r'crf')!,
         threads: mapValueOfType<int>(json, r'threads')!,
+        targetVideoCodec: VideoCodec.fromJson(json[r'targetVideoCodec'])!,
+        targetAudioCodec: AudioCodec.fromJson(json[r'targetAudioCodec'])!,
+        transcode: TranscodePolicy.fromJson(json[r'transcode'])!,
         preset: mapValueOfType<String>(json, r'preset')!,
-        targetVideoCodec: mapValueOfType<String>(json, r'targetVideoCodec')!,
-        targetAudioCodec: mapValueOfType<String>(json, r'targetAudioCodec')!,
         targetResolution: mapValueOfType<String>(json, r'targetResolution')!,
         maxBitrate: mapValueOfType<String>(json, r'maxBitrate')!,
         twoPass: mapValueOfType<bool>(json, r'twoPass')!,
-        transcode: SystemConfigFFmpegDtoTranscodeEnum.fromJson(json[r'transcode'])!,
       );
     }
     return null;
@@ -150,93 +150,13 @@ class SystemConfigFFmpegDto {
   static const requiredKeys = <String>{
     'crf',
     'threads',
-    'preset',
     'targetVideoCodec',
     'targetAudioCodec',
+    'transcode',
+    'preset',
     'targetResolution',
     'maxBitrate',
     'twoPass',
-    'transcode',
   };
 }
 
-
-class SystemConfigFFmpegDtoTranscodeEnum {
-  /// Instantiate a new enum with the provided [value].
-  const SystemConfigFFmpegDtoTranscodeEnum._(this.value);
-
-  /// The underlying value of this enum member.
-  final String value;
-
-  @override
-  String toString() => value;
-
-  String toJson() => value;
-
-  static const all = SystemConfigFFmpegDtoTranscodeEnum._(r'all');
-  static const optimal = SystemConfigFFmpegDtoTranscodeEnum._(r'optimal');
-  static const required_ = SystemConfigFFmpegDtoTranscodeEnum._(r'required');
-  static const disabled = SystemConfigFFmpegDtoTranscodeEnum._(r'disabled');
-
-  /// List of all possible values in this [enum][SystemConfigFFmpegDtoTranscodeEnum].
-  static const values = <SystemConfigFFmpegDtoTranscodeEnum>[
-    all,
-    optimal,
-    required_,
-    disabled,
-  ];
-
-  static SystemConfigFFmpegDtoTranscodeEnum? fromJson(dynamic value) => SystemConfigFFmpegDtoTranscodeEnumTypeTransformer().decode(value);
-
-  static List<SystemConfigFFmpegDtoTranscodeEnum>? listFromJson(dynamic json, {bool growable = false,}) {
-    final result = <SystemConfigFFmpegDtoTranscodeEnum>[];
-    if (json is List && json.isNotEmpty) {
-      for (final row in json) {
-        final value = SystemConfigFFmpegDtoTranscodeEnum.fromJson(row);
-        if (value != null) {
-          result.add(value);
-        }
-      }
-    }
-    return result.toList(growable: growable);
-  }
-}
-
-/// Transformation class that can [encode] an instance of [SystemConfigFFmpegDtoTranscodeEnum] to String,
-/// and [decode] dynamic data back to [SystemConfigFFmpegDtoTranscodeEnum].
-class SystemConfigFFmpegDtoTranscodeEnumTypeTransformer {
-  factory SystemConfigFFmpegDtoTranscodeEnumTypeTransformer() => _instance ??= const SystemConfigFFmpegDtoTranscodeEnumTypeTransformer._();
-
-  const SystemConfigFFmpegDtoTranscodeEnumTypeTransformer._();
-
-  String encode(SystemConfigFFmpegDtoTranscodeEnum data) => data.value;
-
-  /// Decodes a [dynamic value][data] to a SystemConfigFFmpegDtoTranscodeEnum.
-  ///
-  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
-  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
-  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
-  ///
-  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
-  /// and users are still using an old app with the old code.
-  SystemConfigFFmpegDtoTranscodeEnum? decode(dynamic data, {bool allowNull = true}) {
-    if (data != null) {
-      switch (data) {
-        case r'all': return SystemConfigFFmpegDtoTranscodeEnum.all;
-        case r'optimal': return SystemConfigFFmpegDtoTranscodeEnum.optimal;
-        case r'required': return SystemConfigFFmpegDtoTranscodeEnum.required_;
-        case r'disabled': return SystemConfigFFmpegDtoTranscodeEnum.disabled;
-        default:
-          if (!allowNull) {
-            throw ArgumentError('Unknown enum value to decode: $data');
-          }
-      }
-    }
-    return null;
-  }
-
-  /// Singleton [SystemConfigFFmpegDtoTranscodeEnumTypeTransformer] instance.
-  static SystemConfigFFmpegDtoTranscodeEnumTypeTransformer? _instance;
-}
-
-

mobile/openapi/lib/model/transcode_policy.dart

@@ -0,0 +1,91 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+
+class TranscodePolicy {
+  /// Instantiate a new enum with the provided [value].
+  const TranscodePolicy._(this.value);
+
+  /// The underlying value of this enum member.
+  final String value;
+
+  @override
+  String toString() => value;
+
+  String toJson() => value;
+
+  static const all = TranscodePolicy._(r'all');
+  static const optimal = TranscodePolicy._(r'optimal');
+  static const required_ = TranscodePolicy._(r'required');
+  static const disabled = TranscodePolicy._(r'disabled');
+
+  /// List of all possible values in this [enum][TranscodePolicy].
+  static const values = <TranscodePolicy>[
+    all,
+    optimal,
+    required_,
+    disabled,
+  ];
+
+  static TranscodePolicy? fromJson(dynamic value) => TranscodePolicyTypeTransformer().decode(value);
+
+  static List<TranscodePolicy>? listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <TranscodePolicy>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = TranscodePolicy.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+}
+
+/// Transformation class that can [encode] an instance of [TranscodePolicy] to String,
+/// and [decode] dynamic data back to [TranscodePolicy].
+class TranscodePolicyTypeTransformer {
+  factory TranscodePolicyTypeTransformer() => _instance ??= const TranscodePolicyTypeTransformer._();
+
+  const TranscodePolicyTypeTransformer._();
+
+  String encode(TranscodePolicy data) => data.value;
+
+  /// Decodes a [dynamic value][data] to a TranscodePolicy.
+  ///
+  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
+  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
+  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
+  ///
+  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
+  /// and users are still using an old app with the old code.
+  TranscodePolicy? decode(dynamic data, {bool allowNull = true}) {
+    if (data != null) {
+      switch (data) {
+        case r'all': return TranscodePolicy.all;
+        case r'optimal': return TranscodePolicy.optimal;
+        case r'required': return TranscodePolicy.required_;
+        case r'disabled': return TranscodePolicy.disabled;
+        default:
+          if (!allowNull) {
+            throw ArgumentError('Unknown enum value to decode: $data');
+          }
+      }
+    }
+    return null;
+  }
+
+  /// Singleton [TranscodePolicyTypeTransformer] instance.
+  static TranscodePolicyTypeTransformer? _instance;
+}
+

mobile/openapi/lib/model/video_codec.dart

@@ -0,0 +1,88 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+part of openapi.api;
+
+
+class VideoCodec {
+  /// Instantiate a new enum with the provided [value].
+  const VideoCodec._(this.value);
+
+  /// The underlying value of this enum member.
+  final String value;
+
+  @override
+  String toString() => value;
+
+  String toJson() => value;
+
+  static const h264 = VideoCodec._(r'h264');
+  static const hevc = VideoCodec._(r'hevc');
+  static const vp9 = VideoCodec._(r'vp9');
+
+  /// List of all possible values in this [enum][VideoCodec].
+  static const values = <VideoCodec>[
+    h264,
+    hevc,
+    vp9,
+  ];
+
+  static VideoCodec? fromJson(dynamic value) => VideoCodecTypeTransformer().decode(value);
+
+  static List<VideoCodec>? listFromJson(dynamic json, {bool growable = false,}) {
+    final result = <VideoCodec>[];
+    if (json is List && json.isNotEmpty) {
+      for (final row in json) {
+        final value = VideoCodec.fromJson(row);
+        if (value != null) {
+          result.add(value);
+        }
+      }
+    }
+    return result.toList(growable: growable);
+  }
+}
+
+/// Transformation class that can [encode] an instance of [VideoCodec] to String,
+/// and [decode] dynamic data back to [VideoCodec].
+class VideoCodecTypeTransformer {
+  factory VideoCodecTypeTransformer() => _instance ??= const VideoCodecTypeTransformer._();
+
+  const VideoCodecTypeTransformer._();
+
+  String encode(VideoCodec data) => data.value;
+
+  /// Decodes a [dynamic value][data] to a VideoCodec.
+  ///
+  /// If [allowNull] is true and the [dynamic value][data] cannot be decoded successfully,
+  /// then null is returned. However, if [allowNull] is false and the [dynamic value][data]
+  /// cannot be decoded successfully, then an [UnimplementedError] is thrown.
+  ///
+  /// The [allowNull] is very handy when an API changes and a new enum value is added or removed,
+  /// and users are still using an old app with the old code.
+  VideoCodec? decode(dynamic data, {bool allowNull = true}) {
+    if (data != null) {
+      switch (data) {
+        case r'h264': return VideoCodec.h264;
+        case r'hevc': return VideoCodec.hevc;
+        case r'vp9': return VideoCodec.vp9;
+        default:
+          if (!allowNull) {
+            throw ArgumentError('Unknown enum value to decode: $data');
+          }
+      }
+    }
+    return null;
+  }
+
+  /// Singleton [VideoCodecTypeTransformer] instance.
+  static VideoCodecTypeTransformer? _instance;
+}
+

mobile/openapi/test/audio_codec_test.dart

@@ -0,0 +1,21 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for AudioCodec
+void main() {
+
+  group('test AudioCodec', () {
+
+  });
+
+}

mobile/openapi/test/system_config_f_fmpeg_dto_test.dart

@@ -26,21 +26,26 @@ void main() {
       // TODO
     });
 
-    // String preset
-    test('to test the property `preset`', () async {
-      // TODO
-    });
-
-    // String targetVideoCodec
+    // VideoCodec targetVideoCodec
     test('to test the property `targetVideoCodec`', () async {
       // TODO
     });
 
-    // String targetAudioCodec
+    // AudioCodec targetAudioCodec
     test('to test the property `targetAudioCodec`', () async {
       // TODO
     });
 
+    // TranscodePolicy transcode
+    test('to test the property `transcode`', () async {
+      // TODO
+    });
+
+    // String preset
+    test('to test the property `preset`', () async {
+      // TODO
+    });
+
     // String targetResolution
     test('to test the property `targetResolution`', () async {
       // TODO
@@ -56,11 +61,6 @@ void main() {
       // TODO
     });
 
-    // String transcode
-    test('to test the property `transcode`', () async {
-      // TODO
-    });
-
 
   });
 

mobile/openapi/test/transcode_policy_test.dart

@@ -0,0 +1,21 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for TranscodePolicy
+void main() {
+
+  group('test TranscodePolicy', () {
+
+  });
+
+}

mobile/openapi/test/video_codec_test.dart

@@ -0,0 +1,21 @@
+//
+// AUTO-GENERATED FILE, DO NOT MODIFY!
+//
+// @dart=2.12
+
+// ignore_for_file: unused_element, unused_import
+// ignore_for_file: always_put_required_named_parameters_first
+// ignore_for_file: constant_identifier_names
+// ignore_for_file: lines_longer_than_80_chars
+
+import 'package:openapi/api.dart';
+import 'package:test/test.dart';
+
+// tests for VideoCodec
+void main() {
+
+  group('test VideoCodec', () {
+
+  });
+
+}