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This commit is contained in:
Prianka Liz Kariat 2023-05-04 01:02:27 +05:30
parent 4558486459
commit 4401b11c3a
2 changed files with 20 additions and 18 deletions
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30
mediapipe/tasks/ios/vision/image_classifier/sources/MPPImageClassifier.mm
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@ -91,7 +91,10 @@ static NSString *const kTaskName = @"imageClassifier";
// and cause a retain cycle, after self is set to `nil`.
MPPImageClassifier *__weak weakSelf = self;
// Create a private serial dispatch queue in which the deleagte method will be called asynchronously. This is to ensure that if the client performs a long running operation in the delegate method, the queue on which the C++ callbacks is invoked is not blocked and is freed up to continue with its operations.
// Create a private serial dispatch queue in which the deleagte method will be called
// asynchronously. This is to ensure that if the client performs a long running operation in
// the delegate method, the queue on which the C++ callbacks is invoked is not blocked and is
// freed up to continue with its operations.
const char *queueName = [MPPVisionTaskRunner uniqueQueueNameWithTaskName:kTaskName];
dispatch_queue_t callbackQueue = dispatch_queue_create(queueName, NULL);
packetsCallback = [=](absl::StatusOr<PacketMap> status_or_packets) {
@ -108,10 +111,10 @@ static NSString *const kTaskName = @"imageClassifier";
NSError *callbackError = nil;
if (![MPPCommonUtils checkCppError:status_or_packets.status() toError:&callbackError]) {
dispatch_async(callbackQueue, ^{
[weakSelf.imageClassifierDelegate imageClassifier:weakSelf
didFinishClassificationWithResult:nil
timestampInMilliseconds:Timestamp::Unset().Value()
error:callbackError];
[weakSelf.imageClassifierDelegate imageClassifier:weakSelf
didFinishClassificationWithResult:nil
timestampInMilliseconds:Timestamp::Unset().Value()
error:callbackError];
});
return;
}
@ -123,17 +126,16 @@ static NSString *const kTaskName = @"imageClassifier";
MPPImageClassifierResult *result =
[MPPImageClassifierResult imageClassifierResultWithClassificationsPacket:
outputPacketMap[kClassificationsStreamName.cppString]];
outputPacketMap[kClassificationsStreamName.cppString]];
NSInteger timeStampInMilliseconds = outputPacketMap[kImageOutStreamName.cppString]
.Timestamp()
.Value() /
kMicroSecondsPerMilliSecond;
NSInteger timeStampInMilliseconds =
outputPacketMap[kImageOutStreamName.cppString].Timestamp().Value() /
kMicroSecondsPerMilliSecond;
dispatch_async(callbackQueue, ^{
[weakSelf.imageClassifierDelegate imageClassifier:weakSelf
didFinishClassificationWithResult:result
timestampInMilliseconds:timeStampInMilliseconds
error:callbackError];
[weakSelf.imageClassifierDelegate imageClassifier:weakSelf
didFinishClassificationWithResult:result
timestampInMilliseconds:timeStampInMilliseconds
error:callbackError];
});
};
}