Updated comments of MPPCommonUtils

mediapipe/tasks/ios/common/utils/sources/MPPCommonUtils.mm

@@ -26,7 +26,7 @@
 NSString *const MPPTasksErrorDomain = @"com.google.mediapipe.tasks";
 
 namespace {
- using absl::StatusCode;
+using absl::StatusCode;
 }
 
 @implementation MPPCommonUtils
@@ -72,42 +72,17 @@ namespace {
     return YES;
   }
 
-  // Creates the NSEror with the appropriate error
+  /** Converts the absl status message to an NSString. */
-  // MPPTasksErrorCode and message. MPPTasksErrorCode has a one to one
-  // mapping with MediaPipeTasksStatus starting from the value 1(MPPTasksErrorCodeError)
-  // and hence will be correctly initialized if directly cast from the integer code derived from
-  // MediaPipeTasksStatus stored in its payload. MPPTasksErrorCode omits kOk = 0 of
-  // MediaPipeTasksStatusx.
-  //
-  // Stores a string including absl status code and message(if non empty) as the
-  // error message See
-  // https://github.com/abseil/abseil-cpp/blob/master/absl/status/status.h#L514
-  // for explanation. absl::Status::message() can also be used but not always
-  // guaranteed to be non empty.
   NSString *description = [NSString
       stringWithCString:status.ToString(absl::StatusToStringMode::kWithNoExtraData).c_str()
                encoding:NSUTF8StringEncoding];
 
-  // Payload of absl::Status created by the MediaPipe task library stores an appropriate value of
-  // the enum MediaPipeTasksStatus. The integer value corresponding to the MediaPipeTasksStatus enum
-  // stored in the payload is extracted here to later map to the appropriate error code to be
-  // returned. In cases where the enum is not stored in (payload is NULL or the payload string
-  // cannot be converted to an integer), we set the error code value to be 1
-  // (MPPTasksErrorCodeError of MPPTasksErrorCode used in the iOS library to signify
-  // any errors not falling into other categories.) Since payload is of type absl::Cord that can be
-  // type cast into an absl::optional<std::string>, we use the std::stoi function to convert it into
-  // an integer code if possible.
   MPPTasksErrorCode genericErrorCode = MPPTasksErrorCodeUnknownError;
 
   MPPTasksErrorCode errorCode = genericErrorCode;
 
-  // If errorCode is outside the range of enum values possible or is
+  /** Maps the absl::StatusCode to the appropriate MPPTasksErrorCode. Note: MPPTasksErrorCode omits
-  // MPPTasksErrorCodeError, we try to map the absl::Status::code() to assign
+   * absl::StatusCode::kOk. */
-  // appropriate MPPTasksErrorCode in default cases. Note:
-  // The mapping to absl::Status::code() is done to generate a more specific error code than
-  // MPPTasksErrorCodeError in cases when the payload can't be mapped to
-  // MPPTasksErrorCode. This can happen when absl::Status returned by TFLite library are in turn
-  // returned without modification by MediaPipe cc library methods.
   switch (status.code()) {
     case StatusCode::kCancelled:
       errorCode = MPPTasksErrorCodeCancelledError;