Updated method to return unique queue names in MPPVisionTaskRunner

mediapipe/tasks/ios/vision/core/sources/MPPVisionTaskRunner.h

@@ -141,7 +141,19 @@ NS_ASSUME_NONNULL_BEGIN
                                   (mediapipe::tasks::core::PacketsCallback)packetsCallback
                                         error:(NSError **)error NS_UNAVAILABLE;
 
-+ (const char *)uniqueQueueNameWithTaskName:(NSString *)taskName;
+/**
+ * This method returns a unique dispatch queue name by adding the given suffix and a `UUID` to the
+ * pre-defined queue name prefix for vision tasks. The vision tasks can use this method to get
+ * unique dispatch queue names which are consistent with other vision tasks.
+ * Dispatch queue names need not be unique, but for easy debugging we ensure that the queue names
+ * are unique.
+ *
+ * @param suffix A suffix that identifies a dispatch queue's functionality.
+ *
+ * @return A unique dispatch queue name by adding the given suffix and a `UUID` to the pre-defined
+ * queue name prefix for vision tasks.
+ */
++ (const char *)uniqueDispatchQueueNameWithSuffix:(NSString *)suffix;
 
 - (instancetype)init NS_UNAVAILABLE;
 

mediapipe/tasks/ios/vision/core/sources/MPPVisionTaskRunner.mm

@@ -55,10 +55,10 @@ static NSString *const kTaskPrefix = @"com.mediapipe.tasks.vision";
     case MPPRunningModeImage:
     case MPPRunningModeVideo: {
       if (packetsCallback) {
-        [MPPCommonUtils
+        [MPPCommonUtils createCustomError:error
-            createCustomError:error
                                  withCode:MPPTasksErrorCodeInvalidArgumentError
-                  description:@"The vision task is in image or video mode. The delegate must not be set in the task's options."];
+                              description:@"The vision task is in image or video mode. The "
+                                          @"delegate must not be set in the task's options."];
         return nil;
       }
       break;
@@ -203,8 +203,9 @@ static NSString *const kTaskPrefix = @"com.mediapipe.tasks.vision";
   return [self sendPacketMap:packetMap error:error];
 }
 
-+ (const char *)uniqueQueueNameWithTaskName:(NSString *)taskName {
++ (const char *)uniqueDispatchQueueNameWithSuffix:(NSString *)suffix {
-  return [NSString stringWithFormat:@"%@.%@_%@",kTaskPrefix, taskName, [NSString uuidString]].UTF8String;
+  return [NSString stringWithFormat:@"%@.%@_%@", kTaskPrefix, suffix, [NSString uuidString]]
+      .UTF8String;
 }
 
 @end