Added iOS language detector options

mediapipe/tasks/ios/text/language_detector/BUILD

@@ -0,0 +1,27 @@
+# Copyright 2023 The MediaPipe Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+package(default_visibility = [
+    "//mediapipe/tasks:internal",
+])
+
+licenses(["notice"])
+
+objc_library(
+    name = "MPPLanguageDetectorOptions",
+    srcs = ["sources/MPPLanguageDetectorOptions.m"],
+    hdrs = ["sources/MPPLanguageDetectorOptions.h"],
+    deps = ["//mediapipe/tasks/ios/core:MPPTaskOptions"],
+)
+

mediapipe/tasks/ios/text/language_detector/sources/MPPLanguageDetectorOptions.h

@@ -0,0 +1,61 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import <Foundation/Foundation.h>
+
+#import "mediapipe/tasks/ios/core/sources/MPPTaskOptions.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ * Options for setting up a `LanguageDetector`.
+ */
+NS_SWIFT_NAME(LanguageDetectorOptions)
+@interface MPPLanguageDetectorOptions : MPPTaskOptions <NSCopying>
+
+/**
+ * The locale to use for display names specified through the TFLite Model Metadata, if any. Defaults
+ * to English.
+ */
+@property(nonatomic, copy) NSString *displayNamesLocale;
+
+/**
+ * The maximum number of top-scored classification results to return. If < 0, all available results
+ * will be returned. If 0, an invalid argument error is returned.
+ */
+@property(nonatomic) NSInteger maxResults;
+
+/**
+ * Score threshold to override the one provided in the model metadata (if any). Results below this
+ * value are rejected.
+ */
+@property(nonatomic) float scoreThreshold;
+
+/**
+ * The allowlist of category names. If non-empty, detection results whose category name is not in
+ * this set will be filtered out. Duplicate or unknown category names are ignored. Mutually
+ * exclusive with categoryDenylist.
+ */
+@property(nonatomic, copy) NSArray<NSString *> *categoryAllowlist;
+
+/**
+ * The denylist of category names. If non-empty, detection results whose category name is in this
+ * set will be filtered out. Duplicate or unknown category names are ignored. Mutually exclusive
+ * with categoryAllowlist.
+ */
+@property(nonatomic, copy) NSArray<NSString *> *categoryDenylist;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/text/language_detector/sources/MPPLanguageDetectorOptions.m

@@ -0,0 +1,40 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/text/language_detector/sources/MPPLanguageDetectorOptions.h"
+
+@implementation MPPLanguageDetectorOptions
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _maxResults = -1;
+    _scoreThreshold = 0;
+  }
+  return self;
+}
+
+- (id)copyWithZone:(NSZone *)zone {
+  MPPLanguageDetectorOptions *languageDetectorOptions = [super copyWithZone:zone];
+
+  languageDetectorOptions.scoreThreshold = self.scoreThreshold;
+  languageDetectorOptions.maxResults = self.maxResults;
+  languageDetectorOptions.categoryDenylist = self.categoryDenylist;
+  languageDetectorOptions.categoryAllowlist = self.categoryAllowlist;
+  languageDetectorOptions.displayNamesLocale = self.displayNamesLocale;
+
+  return languageDetectorOptions;
+}
+
+@end