Added text packet creator

mediapipe/tasks/ios/core/sources/MPPTextPacketCreator.h

@@ -0,0 +1,26 @@
+// Copyright 2022 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>
+
+#include "mediapipe/framework/packet.h"
+
+/* This class is an Objective-C wrapper around a MediaPipe graph object, and
+ * helps interface it with iOS technologies such as AVFoundation.
+ */
+@interface MPPTextPacketCreator : NSObject
+
++ (mediapipe::Packet)createWithText:(NSString *)text;
+
+@end

mediapipe/tasks/ios/core/sources/MPPTextPacketCreator.mm

@@ -0,0 +1,29 @@
+// Copyright 2019 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/core/sources/MPPTextPacketCreator.h"
+#import "mediapipe/tasks/ios/common/utils/sources/NSString+Helpers.h"
+
+namespace {
+using ::mediapipe::MakePacket;
+using ::mediapipe::Packet;
+}  // namespace
+
+@implementation MPPTextPacketCreator
+
++ (Packet)createWithText:(NSString *)text {
+  return MakePacket<std::string>(text.cppString);
+}
+
+@end