Added MPPEmbedding Helpers

mediapipe/tasks/ios/components/containers/utils/BUILD

@@ -38,3 +38,14 @@ objc_library(
         "//mediapipe/tasks/ios/components/containers:MPPClassificationResult",
     ],
 )
+
+objc_library(
+    name = "MPPEmbeddingHelpers",
+    srcs = ["sources/MPPEmbedding+Helpers.mm"],
+    hdrs = ["sources/MPPEmbedding+Helpers.h"],
+    deps = [
+        "//mediapipe/tasks/cc/components/containers/proto:embeddings_cc_proto",
+        "//mediapipe/tasks/ios/common/utils:NSStringHelpers",
+        "//mediapipe/tasks/ios/components/containers:MPPEmbedding",
+    ]
+)

mediapipe/tasks/ios/components/containers/utils/sources/MPPEmbedding+Helpers.h

@@ -0,0 +1,26 @@
+// 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.
+
+#include "mediapipe/tasks/cc/components/containers/proto/embeddings.pb.h"
+#import "mediapipe/tasks/ios/components/containers/sources/MPPEmbedding.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MPPEmbedding (Helpers)
+
++ (MPPEmbedding *)embeddingWithProto:(const ::mediapipe::tasks::components::containers::proto::Embedding &)embeddingProto;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/components/containers/utils/sources/MPPEmbedding+Helpers.mm

@@ -0,0 +1,62 @@
+// 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/common/utils/sources/NSString+Helpers.h"
+#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPEmbedding+Helpers.h"
+
+#include <memory>
+
+namespace {
+using EmbeddingProto = ::mediapipe::tasks::components::containers::proto::Embedding;
+}
+
+@implementation MPPEmbedding (Helpers)
+
++ (MPPEmbedding *)embeddingWithProto:(const EmbeddingProto &)embeddingProto {
+  NSString *categoryName;
+  NSString *displayName;
+
+  NSMutableArray<NSNumber *> *floatEmbedding;
+  NSData *quantizedEmbedding;
+
+  if (embeddingProto.has_float_embedding()) {
+    floatEmbedding = [NSMutableArray arrayWithCapacity:embeddingProto.float_embedding().values_size()];
+    const auto floatEmbeddingValues = embeddingProto.float_embedding().values();
+
+    for (const auto value : embeddingProto.float_embedding().values()) {
+      [floatEmbedding addObject:[NSNumber numberWithFloat:value]];
+    }
+  }
+
+  if (embeddingProto.has_quantized_embedding()) {
+    const std::string& cppQuantizedEmbedding =
+        embeddingProto.quantized_embedding().values().data();
+
+    const char *cppQuantizedEmbeddingCString = cppQuantizedEmbedding.c_str();
+    quantizedEmbedding = [NSData dataWithBytes:cppQuantizedEmbeddingCString length:sizeof(cppQuantizedEmbeddingCString)];
+  }
+
+  NSString *headName;
+
+  if (embeddingProto.has_head_name()) {
+    headName = [NSString stringWithCppString:embeddingProto.head_name()];
+  }
+
+  return [[MPPEmbedding alloc] initWithFloatEmbedding:floatEmbedding
+                        quantizedEmbedding:quantizedEmbedding
+                             headIndex:embeddingProto.head_index()
+                             headName:headName];
+}
+
+@end