昨天研究過GPUImage框架之后，今天自己嘗試著寫了一個簡單的給視頻添加濾鏡的 demo。
Simulator Screen Shot 2016年4月14日 下午5.02.38.png
demo總共分為兩部分，在錄制過程中直接添加濾鏡、給相冊中的視頻添加濾鏡。
Simulator Screen Shot 2016年4月14日 下午5.04.03.png
錄制過程中直接添加濾鏡，【好吧，界面很丑，沒有圖標，自己也懶得去找那些圖標來填充，直接用色塊來表示了】。界面右上角橘黃色按鈕是用來切換前后攝像頭的，中間空出是視頻預覽圖層，下邊一串紅色圓圈是可以選擇的濾鏡，通過選擇不同的濾鏡來實現不同的效果。最下邊是拍攝按鈕，選擇好濾鏡后點擊拍攝就 ok 了。
Simulator Screen Shot 2016年4月14日 下午5.07.25.png
給本地視頻（相冊）添加濾鏡，界面跟上一個差不多，沒什么好說的。
下邊上一段濾鏡的代碼
/**
* @author mmmmh, 16-04-14 17:04:34
*
* 返回一個數組，數組每一個元素是一個字典，字典里有濾鏡和對應的名字
*
* @return FileterArr
*/
+(NSArray *)creatFilterArray{
NSMutableArray * arr = [NSMutableArray arrayWithCapacity:0];
// GPUImageOutput<GPUImageInput> * Filter1 = [[GPUImageBrightnessFilter alloc] init];
// [(GPUImageBrightnessFilter *)Filter1 setBrightness:0.5];
// NSString * title1 = @"亮度";
// NSDictionary * dic1 = [NSDictionary dictionaryWithObjectsAndKeys:Filter1,@"filter",title1,@"name", nil];
// [arr addObject:dic1];
// GPUImageOutput<GPUImageInput> * Filter2 = [[GPUImageExposureFilter alloc] init];
// [(GPUImageExposureFilter *)Filter2 setExposure:5];
// NSString * title2 = @"曝光";
// NSDictionary * dic2 = [NSDictionary dictionaryWithObjectsAndKeys:Filter2,@"filter",title2,@"name", nil];
// [arr addObject:dic2];
// GPUImageOutput<GPUImageInput> * Filter3 = [[GPUImageContrastFilter alloc] init];
// [(GPUImageContrastFilter *)Filter3 setContrast:1.5];
// NSString * title3 = @"對比度";
// NSDictionary * dic3 = [NSDictionary dictionaryWithObjectsAndKeys:Filter3,@"filter",title3,@"name", nil];
// [arr addObject:dic3];
// GPUImageOutput<GPUImageInput> * Filter4 = [[GPUImageSaturationFilter alloc] init];
// [(GPUImageSaturationFilter *)Filter4 setSaturation:1.5];
// NSString * title4 = @"飽和度";
// NSDictionary * dic4 = [NSDictionary dictionaryWithObjectsAndKeys:Filter4,@"filter",title4,@"name", nil];
// [arr addObject:dic4];
// GPUImageOutput<GPUImageInput> * Filter5 = [[GPUImageGammaFilter alloc] init];
// [(GPUImageGammaFilter *)Filter5 setGamma:1.5];
// NSString * title5 = @"伽馬線";
// NSDictionary * dic5 = [NSDictionary dictionaryWithObjectsAndKeys:Filter5,@"filter",title5,@"name", nil];
GPUImageOutput<GPUImageInput> * Filter6 = [[GPUImageColorInvertFilter alloc] init];
NSString * title6 = @"反色";
NSDictionary * dic6 = [NSDictionary dictionaryWithObjectsAndKeys:Filter6,@"filter",title6,@"name", nil];
[arr addObject:dic6];
GPUImageOutput<GPUImageInput> * Filter7 = [[GPUImageSepiaFilter alloc] init];
NSString * title7 = @"褐色懷舊";
NSDictionary * dic7 = [NSDictionary dictionaryWithObjectsAndKeys:Filter7,@"filter",title7,@"name", nil];
[arr addObject:dic7];
// GPUImageOutput<GPUImageInput> * Filter8 = [[GPUImageGrayscaleFilter alloc] init];
// NSString * title8 = @"灰度";
// NSDictionary * dic8 = [NSDictionary dictionaryWithObjectsAndKeys:Filter8,@"filter",title8,@"name", nil];
// [arr addObject:dic8];
// GPUImageOutput<GPUImageInput> * Filter9 = [[GPUImageHistogramGenerator alloc] init];
// NSString * title9 = @"色彩直方圖？";
// NSDictionary * dic9 = [NSDictionary dictionaryWithObjectsAndKeys:Filter9,@"filter",title9,@"name", nil];
GPUImageOutput<GPUImageInput> * Filter10 = [[GPUImageRGBFilter alloc] init];
NSString * title10 = @"RGB";
[(GPUImageRGBFilter *)Filter10 setRed:0.8];
[(GPUImageRGBFilter *)Filter10 setGreen:0.3];
[(GPUImageRGBFilter *)Filter10 setBlue:0.5];
NSDictionary * dic10 = [NSDictionary dictionaryWithObjectsAndKeys:Filter10,@"filter",title10,@"name", nil];
[arr addObject:dic10];
GPUImageOutput<GPUImageInput> * Filter11 = [[GPUImageMonochromeFilter alloc] init];
[(GPUImageMonochromeFilter *)Filter11 setColorRed:0.3 green:0.5 blue:0.8];
NSString * title11 = @"單色";
NSDictionary * dic11 = [NSDictionary dictionaryWithObjectsAndKeys:Filter11,@"filter",title11,@"name", nil];
[arr addObject:dic11];
// GPUImageOutput<GPUImageInput> * Filter12 = [[GPUImageBoxBlurFilter alloc] init];
//// [(GPUImageMonochromeFilter *)Filter11 setColorRed:0.3 green:0.5 blue:0.8];
// NSString * title12 = @"單色";
// NSDictionary * dic12 = [NSDictionary dictionaryWithObjectsAndKeys:Filter12,@"filter",title12,@"name", nil];
// [arr addObject:dic12];
// GPUImageOutput<GPUImageInput> * Filter13 = [[GPUImageSobelEdgeDetectionFilter alloc] init];
//// [(GPUImageSobelEdgeDetectionFilter *)Filter13 ];
// NSString * title13 = @"漫畫反色";
// NSDictionary * dic13 = [NSDictionary dictionaryWithObjectsAndKeys:Filter13,@"filter",title13,@"name", nil];
// [arr addObject:dic13];
// GPUImageOutput<GPUImageInput> * Filter14 = [[GPUImageXYDerivativeFilter alloc] init];
// // [(GPUImageSobelEdgeDetectionFilter *)Filter13 ];
// NSString * title14 = @"藍綠邊緣";
// NSDictionary * dic14 = [NSDictionary dictionaryWithObjectsAndKeys:Filter14,@"filter",title14,@"name", nil];
// [arr addObject:dic14];
GPUImageOutput<GPUImageInput> * Filter15 = [[GPUImageSketchFilter alloc] init];
// [(GPUImageSobelEdgeDetectionFilter *)Filter13 ];
NSString * title15 = @"素描";
NSDictionary * dic15 = [NSDictionary dictionaryWithObjectsAndKeys:Filter15,@"filter",title15,@"name", nil];
[arr addObject:dic15];
GPUImageOutput<GPUImageInput> * Filter16 = [[GPUImageSmoothToonFilter alloc] init];
// [(GPUImageSobelEdgeDetectionFilter *)Filter13 ];
NSString * title16 = @"卡通";
NSDictionary * dic16 = [NSDictionary dictionaryWithObjectsAndKeys:Filter16,@"filter",title16,@"name", nil];
[arr addObject:dic16];
GPUImageOutput<GPUImageInput> * Filter17 = [[GPUImageColorPackingFilter alloc] init];
// [(GPUImageSobelEdgeDetectionFilter *)Filter13 ];
NSString * title17 = @"監控";
NSDictionary * dic17 = [NSDictionary dictionaryWithObjectsAndKeys:Filter17,@"filter",title17,@"name", nil];
[arr addObject:dic17];
// GPUImageOutput<GPUImageInput> * Filter18 = [[GPUImageVignetteFilter alloc] init];
// // [(GPUImageSobelEdgeDetectionFilter *)Filter13 ];
// NSString * title18 = @"暈影";
// NSDictionary * dic18 = [NSDictionary dictionaryWithObjectsAndKeys:Filter18,@"filter",title18,@"name", nil];
// [arr addObject:dic18];
GPUImageOutput<GPUImageInput> * Filter19 = [[GPUImageSwirlFilter alloc] init];
[(GPUImageSwirlFilter *)Filter19 setRadius:1.0];
[(GPUImageSwirlFilter*)Filter19 setAngle:0.3];
NSString * title19 = @"漩渦";
NSDictionary * dic19 = [NSDictionary dictionaryWithObjectsAndKeys:Filter19,@"filter",title19,@"name", nil];
[arr addObject:dic19];
GPUImageOutput<GPUImageInput> * Filter20 = [[GPUImageBulgeDistortionFilter alloc] init];
[(GPUImageBulgeDistortionFilter *)Filter20 setRadius:0.5];//0-1
[(GPUImageBulgeDistortionFilter*)Filter20 setScale:0.5];//-1.0----1.0
NSString * title20 = @"魚眼";
NSDictionary * dic20 = [NSDictionary dictionaryWithObjectsAndKeys:Filter20,@"filter",title20,@"name", nil];
[arr addObject:dic20];
GPUImageOutput<GPUImageInput> * Filter21 = [[GPUImagePinchDistortionFilter alloc] init];
// [(GPUImagePinchDistortionFilter *)Filter21 setRadius:0.5];
// [(GPUImagePinchDistortionFilter*)Filter21 setScale:0.5];
NSString * title21 = @"凹面鏡";
NSDictionary * dic21 = [NSDictionary dictionaryWithObjectsAndKeys:Filter21,@"filter",title21,@"name", nil];
[arr addObject:dic21];
GPUImageOutput<GPUImageInput> * Filter22 = [[GPUImageStretchDistortionFilter alloc] init];
// [(GPUImageStretchDistortionFilter *)Filter21 setRadius:0.5];
// [(GPUImageStretchDistortionFilter*)Filter21 setScale:0.5];
NSString * title22 = @"凹面鏡";
NSDictionary * dic22 = [NSDictionary dictionaryWithObjectsAndKeys:Filter22,@"filter",title22,@"name", nil];
[arr addObject:dic22];
GPUImageOutput<GPUImageInput> * Filter23 = [[GPUImageGlassSphereFilter alloc] init];
NSString * title23 = @"水晶球";
NSDictionary * dic23 = [NSDictionary dictionaryWithObjectsAndKeys:Filter23,@"filter",title23,@"name", nil];
[arr addObject:dic23];
GPUImageOutput<GPUImageInput> * Filter24 = [[GPUImageSphereRefractionFilter alloc] init];
NSString * title24 = @"水晶球反";
NSDictionary * dic24 = [NSDictionary dictionaryWithObjectsAndKeys:Filter24,@"filter",title24,@"name", nil];
[arr addObject:dic24];
GPUImageOutput<GPUImageInput> * Filter25 = [[GPUImageEmbossFilter alloc] init];
NSString * title25 = @"浮雕";
NSDictionary * dic25 = [NSDictionary dictionaryWithObjectsAndKeys:Filter25,@"filter",title25,@"name", nil];
[arr addObject:dic25];
// GPUImageFilterGroup * grop = [[GPUImageFilterGroup alloc] init];
// GPUImageOutput<GPUImageInput> * Filter100 = [[GPUImageSwirlFilter alloc] init];
// [(GPUImageSwirlFilter *)Filter100 setRadius:1.0];
// [(GPUImageSwirlFilter*)Filter100 setAngle:0.3];
// GPUImageOutput<GPUImageInput> * Filter200 = [[GPUImageGlassSphereFilter alloc] init];
// [grop addFilter:Filter100];
// [grop addFilter:Filter200];
// NSString * title200 = @"grop";
// NSDictionary * dic250 = [NSDictionary dictionaryWithObjectsAndKeys:grop,@"filter",title200,@"name", nil];
// [arr addObject:dic250];
return arr;
}
關于濾鏡的使用，如果有興趣的請自行下載查看，點擊下載demo
