Implementation of Real-time GPUimage filter and real-time gpuimage Filter

Implementation of Real-time GPUimage filter and real-time gpuimage Filter

GPUImageStillCamera in GPUIMAGE can call the System camera and implement real-time filters. However, I have not found a full screen method for the camera.

GPUImageStillCameraInherited from the GPUImageVideoCamera class, added the photo capture function.

GPUImageVideoCamera

Initialization Method:

-(Id) initWithSessionPreset :( NSString *) sessionPreset cameraPosition :( AVCaptureDevicePosition) cameraPosition

SessionPreset is the resolution when the camera is shooting. The value is as follows:

AVCaptureSessionPresetPhotoAVCaptureSessionPresetHighAVCaptureSessionPresetMediumAVCaptureSessionPresetLowAVCaptureSessionPreset320x240AVCaptureSessionPreset352x288AVCaptureSessionPreset640x480AVCaptureSessionPreset960x540AVCaptureSessionPreset1280x720AVCaptureSessionPreset1920x1080AVCaptureSessionPreset3840x2160AVCaptureSessionPresetiFrame960x540AVCaptureSessionPresetiFrame1280x720AVCaptureSessionPresetInputPriority

 

CameraPosition camera device, divided into front and back

AVCaptureDevicePositionFrontAVCaptureDevicePositionBack

 

 

-(Void) startCameraCapture; start to capture

-(Void) stopCameraCapture; stop capture

-(Void) rotateCamera; switch between front and rear cameras

 

Add Real-Time Filter

DefinitionGPUImageStillCameraObject

mCamera = [[GPUImageStillCamera alloc] initWithSessionPreset:AVCaptureSessionPresetPhoto cameraPosition:AVCaptureDevicePositionBack];    _isBack = YES;//    _mCamera.horizontallyMirrorRearFacingCamera = NO;//    _mCamera.horizontallyMirrorFrontFacingCamera = YES;    _mCamera.outputImageOrientation = UIInterfaceOrientationPortrait;

 

Define the filter to be applied

_mFilter = [[FWAmaroFilter alloc] init];

 

 

Define the GPUImageView object and setGPUImageStillCameraThe image captured by the object is printed on the GPUImageView layer.

    _mGPUImgView = [[GPUImageView alloc]initWithFrame:CGRectMake(0, 0, 320, 426)];

 

Add filter

    [_mCamera addTarget:_mFilter];

 

Add display

    [_mFilter addTarget:_mGPUImgView];

 

Start capture

    [_mCamera startCameraCapture];

 

    [self.view addSubview:_mGPUImgView];

 

So far. Real-time filters have been implemented

 

Implement photo taking

-(void)takePhoto{    [_mCamera capturePhotoAsJPEGProcessedUpToFilter:_mFilter withCompletionHandler:^(NSData *processedJPEG, NSError *error){        [[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{        [[PHAssetCreationRequest creationRequestForAsset] addResourceWithType:PHAssetResourceTypePhoto data:processedJPEG options:nil];        } completionHandler:^(BOOL success, NSError * _Nullable error) {                    }];    }];}