Merge pull request #8 from googlesamples/caren/merge_ios_improvements

iOS Vision Quickstart: Performance inprovement for stream mode.
googlesamples · Jun 8, 2020 · f0afc96 · f0afc96
2 parents 734af50 + cc22396
commit f0afc96
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diff --git a/ios/quickstarts/vision/VisionExample/CameraViewController.swift b/ios/quickstarts/vision/VisionExample/CameraViewController.swift
@@ -321,6 +321,7 @@ class CameraViewController: UIViewController {
       output.videoSettings = [
         (kCVPixelBufferPixelFormatTypeKey as String): kCVPixelFormatType_32BGRA,
       ]
+      output.alwaysDiscardsLateVideoFrames = true
       let outputQueue = DispatchQueue(label: Constant.videoDataOutputQueueLabel)
       output.setSampleBufferDelegate(self, queue: outputQueue)
       guard self.captureSession.canAddOutput(output) else {

diff --git a/ios/quickstarts/vision/VisionExampleObjc/CameraViewController.m b/ios/quickstarts/vision/VisionExampleObjc/CameraViewController.m
@@ -341,6 +341,7 @@ - (void)setUpCaptureSessionOutput {
       (id)
       kCVPixelBufferPixelFormatTypeKey : [NSNumber numberWithUnsignedInt:kCVPixelFormatType_32BGRA]
     };
+    output.alwaysDiscardsLateVideoFrames = YES;
     dispatch_queue_t outputQueue = dispatch_queue_create(videoDataOutputQueueLabel.UTF8String, nil);
     [output setSampleBufferDelegate:self queue:outputQueue];
     if ([self.captureSession canAddOutput:output]) {