ZXing Scan Capture

- (void)captureOutput1:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection
{
    if (_finished) {
        NSLog(@"Enter captureOutput:didOutputSampleBuffer, but return because finished");
        return;
    }
    _zxcount ++;
//    NSLog(@"Enter captureOutput:didOutputSampleBuffer %lu", (unsigned long)_zxcount);
    
    @autoreleasepool {
        
        CVImageBufferRef videoFrame = CMSampleBufferGetImageBuffer(sampleBuffer);
        ZXResult* result;
        
        if (_zxcount % 2 == 0) {
            CGImageRef videoFrameImage = [ZXCGImageLuminanceSource createImageFromBuffer:videoFrame];
            CGImageRef rotatedImage = [self createRotatedImage:videoFrameImage degrees:90];
            ZXLuminanceSource *source = [[ZXCGImageLuminanceSource alloc] initWithCGImage:rotatedImage];
            ZXBinaryBitmap *bitmap = [[ZXBinaryBitmap alloc] initWithBinarizer:[[ZXHybridBinarizer alloc] initWithSource:source]];
            result = [_reader decode:bitmap hints:_hints error:nil];
            CGImageRelease(videoFrameImage);
            CGImageRelease(rotatedImage);
        } else {
            ZXLuminanceSource *source = [[ZXCGImageLuminanceSource alloc] initWithBuffer:videoFrame];
            ZXBinaryBitmap *bitmap = [[ZXBinaryBitmap alloc] initWithBinarizer:[[ZXHybridBinarizer alloc] initWithSource:source]];
            result = [_reader decode:bitmap hints:_hints error:nil];
        }
        
        [_reader reset];
        if (result) {
            _finished = YES;
            
//            NSLog(@"zbar scan count %d",  [_scanner scanImage:[[ZBarImage alloc] initWithCGImage:videoFrameImage]]);
            
            NSLog(@"ZXing type ==> %@", [BSType typeByFormat:result.barcodeFormat]);
            NSLog(@"ZXing value ==> %@", result.text);
            [[self results] addSymbolWithCode:result.text type:[BSType typeByFormat:result.barcodeFormat]];
            
            if ([NSThread isMainThread])
            {
                
                [self dismissViewControllerAnimated:YES completion:^{
                    _completeBlock(self, [self results]);
                }];;
            }
            else
            {
                dispatch_sync(dispatch_get_main_queue(), ^{
                    [self dismissViewControllerAnimated:YES completion:^{
                        _completeBlock(self, [self results]);
                    }];
                });
            }
        }
    }
    
//    NSLog(@"Leave captureOutput %lu", (unsigned long)_zxcount);
}