簡概:
本次文章主要介紹給視頻添加動效水印的幾種方式，以及實現(xiàn)代碼。
使用AVFoundation + CoreAnimation 合成方式
基于Lottie 核心也是 CoreAnimation ，這里我們也可以使用AVFoundation + Lottie 合成方式
我們同樣可以使用序列幀資源或者gif資源 來編寫一段keyFrameAnination，這里我們就介紹一段 AVFoundation + Gif 合成方式
使用 GPUImageUIElement 將序列幀資源合并在目標(biāo)資源上
使用 GPUImage 將水印視頻合并在目標(biāo)資源上
如果你有問題，或者對下述文字有任何意見與建議，可以在文章最后留言
視頻處理后效果 GIF
原視頻.gif
CoreAnimation.gif
Lottie.gif
GIF.gif
GPUImageType1.gif
GPUImageType2.gif
1.使用AVFoundation + CoreAnimation 合成方式
#pragma mark CorAnimation+ (void)addWaterMarkTypeWithCorAnimationAndInputVideoURL:(NSURL*)InputURL WithCompletionHandler:(void (^)(NSURL* outPutURL, int code))handler{? ? NSDictionary *opts = [NSDictionary dictionaryWithObject:@(YES) forKey:AVURLAssetPreferPreciseDurationAndTimingKey];? ? AVAsset *videoAsset = [AVURLAsset URLAssetWithURL:InputURL options:opts];? ? AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init];? ? AVMutableCompositionTrack *videoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo
preferredTrackID:kCMPersistentTrackID_Invalid];? ? NSError *errorVideo = [NSError new];? ? AVAssetTrack *assetVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]firstObject];? ? CMTime endTime = assetVideoTrack.asset.duration;? ? BOOL bl = [videoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, assetVideoTrack.asset.duration)
ofTrack:assetVideoTrack
atTime:kCMTimeZero error:&errorVideo];
videoTrack.preferredTransform = assetVideoTrack.preferredTransform;? ? NSLog(@"errorVideo:%ld%d",errorVideo.code,bl);? ? NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);? ? NSString *documentsDirectory = [paths objectAtIndex:0];? ? NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"yyyyMMddHHmmss";? ? NSString *outPutFileName = [formatter stringFromDate:[NSDate dateWithTimeIntervalSinceNow:0]];? ? NSString *myPathDocs =? [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mov",outPutFileName]];? ? NSURL* outPutVideoUrl = [NSURL fileURLWithPath:myPathDocs];? ?
CGSize videoSize = [videoTrack naturalSize];? ?
UIFont *font = [UIFont systemFontOfSize:60.0];? ? CATextLayer *aLayer = [[CATextLayer alloc] init];
[aLayer setFontSize:60];
[aLayer setString:@"H"];
[aLayer setAlignmentMode:kCAAlignmentCenter];
[aLayer setForegroundColor:[[UIColor greenColor] CGColor]];
[aLayer setBackgroundColor:[UIColor clearColor].CGColor];? ? CGSize textSize = [@"H" sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];
[aLayer setFrame:CGRectMake(240, 470, textSize.width, textSize.height)];
aLayer.anchorPoint = CGPointMake(0.5, 1.0);? ?
CATextLayer *bLayer = [[CATextLayer alloc] init];
[bLayer setFontSize:60];
[bLayer setString:@"E"];
[bLayer setAlignmentMode:kCAAlignmentCenter];
[bLayer setForegroundColor:[[UIColor greenColor] CGColor]];
[bLayer setBackgroundColor:[UIColor clearColor].CGColor];? ? CGSize textSizeb = [@"E" sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];
[bLayer setFrame:CGRectMake(240 + textSize.width, 470 , textSizeb.width, textSizeb.height)];
bLayer.anchorPoint = CGPointMake(0.5, 1.0);? ?
CATextLayer *cLayer = [[CATextLayer alloc] init];
[cLayer setFontSize:60];
[cLayer setString:@"L"];
[cLayer setAlignmentMode:kCAAlignmentCenter];
[cLayer setForegroundColor:[[UIColor greenColor] CGColor]];
[cLayer setBackgroundColor:[UIColor clearColor].CGColor];? ? CGSize textSizec = [@"L" sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];
[cLayer setFrame:CGRectMake(240 + textSizeb.width + textSize.width, 470 , textSizec.width, textSizec.height)];
cLayer.anchorPoint = CGPointMake(0.5, 1.0);? ?
CATextLayer *dLayer = [[CATextLayer alloc] init];
[dLayer setFontSize:60];
[dLayer setString:@"L"];
[dLayer setAlignmentMode:kCAAlignmentCenter];
[dLayer setForegroundColor:[[UIColor greenColor] CGColor]];
[dLayer setBackgroundColor:[UIColor clearColor].CGColor];? ? CGSize textSized = [@"L" sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];
[dLayer setFrame:CGRectMake(240 + textSizec.width+ textSizeb.width + textSize.width, 470 , textSized.width, textSized.height)];
dLayer.anchorPoint = CGPointMake(0.5, 1.0);? ?
CATextLayer *eLayer = [[CATextLayer alloc] init];
[eLayer setFontSize:60];
[eLayer setString:@"O"];
[eLayer setAlignmentMode:kCAAlignmentCenter];
[eLayer setForegroundColor:[[UIColor greenColor] CGColor]];
[eLayer setBackgroundColor:[UIColor clearColor].CGColor];? ? CGSize textSizede = [@"O" sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];
[eLayer setFrame:CGRectMake(240 + textSized.width + textSizec.width+ textSizeb.width + textSize.width, 470 , textSizede.width, textSizede.height)];
eLayer.anchorPoint = CGPointMake(0.5, 1.0);? ? CABasicAnimation* basicAni = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
basicAni.fromValue = @(0.2f);
basicAni.toValue = @(1.0f);
basicAni.beginTime = AVCoreAnimationBeginTimeAtZero;
basicAni.duration = 2.0f;
basicAni.repeatCount = HUGE_VALF;
basicAni.removedOnCompletion = NO;
basicAni.fillMode = kCAFillModeForwards;
[aLayer addAnimation:basicAni forKey:nil];
[bLayer addAnimation:basicAni forKey:nil];
[cLayer addAnimation:basicAni forKey:nil];
[dLayer addAnimation:basicAni forKey:nil];
[eLayer addAnimation:basicAni forKey:nil];? ?
CALayer *parentLayer = [CALayer layer];? ? CALayer *videoLayer = [CALayer layer];
parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
[parentLayer addSublayer:videoLayer];
[parentLayer addSublayer:aLayer];
[parentLayer addSublayer:bLayer];
[parentLayer addSublayer:cLayer];
[parentLayer addSublayer:dLayer];
[parentLayer addSublayer:eLayer];? ? AVMutableVideoComposition* videoComp = [AVMutableVideoComposition videoComposition];
videoComp.renderSize = videoSize;
parentLayer.geometryFlipped = true;
videoComp.frameDuration = CMTimeMake(1, 30);
videoComp.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];? ? AVMutableVideoCompositionInstruction* instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
instruction.timeRange = CMTimeRangeMake(kCMTimeZero, endTime);? ? AVMutableVideoCompositionLayerInstruction* layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:videoTrack];
instruction.layerInstructions = [NSArray arrayWithObjects:layerInstruction, nil];
videoComp.instructions = [NSArray arrayWithObject: instruction];? ?
AVAssetExportSession* exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition
presetName:AVAssetExportPresetHighestQuality];
exporter.outputURL=outPutVideoUrl;
exporter.outputFileType = AVFileTypeMPEG4;
exporter.shouldOptimizeForNetworkUse = YES;
exporter.videoComposition = videoComp;
[exporter exportAsynchronouslyWithCompletionHandler:^{? ? ? ? dispatch_async(dispatch_get_main_queue(), ^{? ? ? ? ? ? //這里是輸出視頻之后的操作，做你想做的
NSLog(@"輸出視頻地址:%@ andCode:%@",myPathDocs,exporter.error);
handler(outPutVideoUrl,(int)exporter.error.code);
});
}];
}
2.基于Lottie 核心也是 CoreAnimation ，這里我們也可以使用AVFoundation +Lottie 合成方式
與第一段代碼不同的地方
LOTAnimationView* animation = [LOTAnimationView animationNamed:@"青蛙"];
animation.frame = CGRectMake(150 , 340 , 240 , 240 );
animation.animationSpeed = 5.0 ;
animation.loopAnimation = YES;
[animation play];? ?
CALayer *parentLayer = [CALayer layer];? ? CALayer *videoLayer = [CALayer layer];
parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
[parentLayer addSublayer:videoLayer];
[parentLayer addSublayer:animation.layer];
3.我們同樣可以使用序列幀資源或者gif資源 來編寫一段keyFrameAnination，這里我們就介紹一段 AVFoundation + Gif 合成方式
與第一段代碼不同的地方是將gif 轉(zhuǎn)成layer 的KEYFrameAnimation
CALayer *gifLayer1 = [[CALayer alloc] init];
gifLayer1.frame = CGRectMake(150 , 340 , 298 , 253 );? ? CAKeyframeAnimation *gifLayer1Animation = [WatermarkEngine animationForGifWithURL:[[NSBundle mainBundle] URLForResource:@"雪人完成_1" withExtension:@"gif"]];
gifLayer1Animation.beginTime = AVCoreAnimationBeginTimeAtZero;
gifLayer1Animation.removedOnCompletion = NO;
[gifLayer1 addAnimation:gifLayer1Animation forKey:@"gif"];? ?
CALayer *parentLayer = [CALayer layer];? ? CALayer *videoLayer = [CALayer layer];
parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
[parentLayer addSublayer:videoLayer];
[parentLayer addSublayer:gifLayer1];
+ (CAKeyframeAnimation *)animationForGifWithURL:(NSURL *)url {? ?
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"contents"];? ?
NSMutableArray * frames = [NSMutableArray new];? ? NSMutableArray *delayTimes = [NSMutableArray new];? ?
CGFloat totalTime = 0.0;? ? CGFloat gifWidth;? ? CGFloat gifHeight;? ?
CGImageSourceRef gifSource = CGImageSourceCreateWithURL((CFURLRef)url, NULL);? ?
// get frame count
size_t frameCount = CGImageSourceGetCount(gifSource);? ? for (size_t i = 0; i < frameCount; ++i) {? ? ? ? // get each frame
CGImageRef frame = CGImageSourceCreateImageAtIndex(gifSource, i, NULL);
[frames addObject:(__bridge id)frame];? ? ? ? CGImageRelease(frame);? ? ? ?
// get gif info with each frame
NSDictionary *dict = (NSDictionary*)CFBridgingRelease(CGImageSourceCopyPropertiesAtIndex(gifSource, i, NULL));? ? ? ? NSLog(@"kCGImagePropertyGIFDictionary %@", [dict valueForKey:(NSString*)kCGImagePropertyGIFDictionary]);? ? ? ?
// get gif size
gifWidth = [[dict valueForKey:(NSString*)kCGImagePropertyPixelWidth] floatValue];
gifHeight = [[dict valueForKey:(NSString*)kCGImagePropertyPixelHeight] floatValue];? ? ? ?
// kCGImagePropertyGIFDictionary中kCGImagePropertyGIFDelayTime，kCGImagePropertyGIFUnclampedDelayTime值是一樣的
NSDictionary *gifDict = [dict valueForKey:(NSString*)kCGImagePropertyGIFDictionary];
[delayTimes addObject:[gifDict valueForKey:(NSString*)kCGImagePropertyGIFUnclampedDelayTime]];
totalTime = totalTime + [[gifDict valueForKey:(NSString*)kCGImagePropertyGIFUnclampedDelayTime] floatValue];? ? ? ?
//? ? ? ? CFRelease((__bridge CFTypeRef)(dict));
//? ? ? ? CFRelease((__bridge CFTypeRef)(dict));
}? ? if (gifSource) {? ? ? ? CFRelease(gifSource);
}? ?
NSMutableArray *times = [NSMutableArray arrayWithCapacity:3];? ? CGFloat currentTime = 0;? ? NSInteger count = delayTimes.count;? ? for (int i = 0; i < count; ++i) {
[times addObject:[NSNumber numberWithFloat:(currentTime / totalTime)]];
currentTime += [[delayTimes objectAtIndex:i] floatValue];
}? ?
NSMutableArray *images = [NSMutableArray arrayWithCapacity:3];? ? for (int i = 0; i < count; ++i) {
[images addObject:[frames objectAtIndex:i]];
}
animation.keyTimes = times;
animation.values = images;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.duration = totalTime;
animation.repeatCount = HUGE_VALF;? ?
return animation;
}
4.使用 GPUImage 將水印視頻合并在目標(biāo)資源上
#pragma mark GPUImage TWO VIDEO INPUT+ (void)addWaterMarkTypeWithGPUImageAndInputVideoURL:(NSURL*)InputURL AndWaterMarkVideoURL:(NSURL*)InputURL2 WithCompletionHandler:(void (^)(NSURL* outPutURL, int code))handler{? ? NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);? ? NSString *documentsDirectory = [paths objectAtIndex:0];? ? NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"yyyyMMddHHmmss";? ? NSString *outPutFileName = [formatter stringFromDate:[NSDate dateWithTimeIntervalSinceNow:0]];? ? NSString *myPathDocs =? [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mov",outPutFileName]];? ? NSURL* outPutVideoUrl = [NSURL fileURLWithPath:myPathDocs];
GPUImageMovie* movieFile = [[GPUImageMovie alloc] initWithURL:InputURL];
GPUImageMovie* movieFile2 = [[GPUImageMovie alloc] initWithURL:InputURL2];
GPUImageScreenBlendFilter* filter =? [[GPUImageScreenBlendFilter alloc] init];
[movieFile addTarget:filter];
[movieFile2 addTarget:filter];
GPUImageMovieWriter* movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:outPutVideoUrl size:CGSizeMake(540, 960) fileType:AVFileTypeQuickTimeMovie outputSettings:? ? @
{? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoCodecKey: AVVideoCodecH264,? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoWidthKey: @540,? //Set your resolution width here
AVVideoHeightKey: @960,? //set your resolution height here
AVVideoCompressionPropertiesKey: @
{? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? //2000*1000? 建議800*1000-5000*1000
//AVVideoAverageBitRateKey: @2500000, // Give your bitrate here for lower size give low values
AVVideoAverageBitRateKey: @5000000,? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoProfileLevelKey: AVVideoProfileLevelH264HighAutoLevel,? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoAverageNonDroppableFrameRateKey: @30,
},
}
];
[filter? addTarget:movieWriter];? ? AVAsset* videoAsset = [AVAsset assetWithURL:InputURL];? ? AVAssetTrack *assetVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]firstObject];
movieWriter.transform = assetVideoTrack.preferredTransform;? ? //? ? [movie enableSynchronizedEncodingUsingMovieWriter:movieWriter];
[movieWriter startRecording];
[movieFile startProcessing];
[movieFile2 startProcessing];
[movieWriter setCompletionBlock:^{? ? ? ? dispatch_async(dispatch_get_main_queue(), ^{? ? ? ? ? ? NSLog(@"movieWriter Completion");
handler(outPutVideoUrl,1);
});
}];
}
5.使用 GPUImageUIElement 將序列幀資源合并在目標(biāo)資源上
#pragma mark GPUImageUIElement+ (void)addWaterMarkTypeWithGPUImageUIElementAndInputVideoURL:(NSURL*)InputURL WithCompletionHandler:(void (^)(NSURL* outPutURL, int code))handler{? ? NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);? ? NSString *documentsDirectory = [paths objectAtIndex:0];? ? NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"yyyyMMddHHmmss";? ? NSString *outPutFileName = [formatter stringFromDate:[NSDate dateWithTimeIntervalSinceNow:0]];? ? NSString *myPathDocs =? [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mov",outPutFileName]];? ? NSURL* outPutVideoUrl = [NSURL fileURLWithPath:myPathDocs];
GPUImageMovie* movieFile = [[GPUImageMovie alloc] initWithURL:InputURL];? ?
NSValue *value = [NSValue valueWithCGRect:CGRectMake([UIScreen mainScreen].bounds.size.width/2.0 - (332 /2.0) , [UIScreen mainScreen].bounds.size.height/2.0 - (297 /2.0) , 332 , 297 )];? ? NSValue *value2 = [NSValue valueWithCGAffineTransform:CGAffineTransformMake(1, 0, 0, 1, 0, 0)];? ? UIView* view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
GPUImageFilterGroup* filter =? [WatermarkEngine addWatermarkWithResourcesNames:@[@"雨天青蛙"] Andframes:@[value] AndTransform:@[value2] AndLabelViews:@[view]];
[movieFile addTarget:filter];
GPUImageMovieWriter* movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:outPutVideoUrl size:CGSizeMake(540, 960) fileType:AVFileTypeQuickTimeMovie outputSettings:? ? @
{? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoCodecKey: AVVideoCodecH264,? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoWidthKey: @540,? //Set your resolution width here
AVVideoHeightKey: @960,? //set your resolution height here
AVVideoCompressionPropertiesKey: @
{? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? //2000*1000? 建議800*1000-5000*1000
//AVVideoAverageBitRateKey: @2500000, // Give your bitrate here for lower size give low values
AVVideoAverageBitRateKey: @5000000,? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoProfileLevelKey: AVVideoProfileLevelH264HighAutoLevel,? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? AVVideoAverageNonDroppableFrameRateKey: @30,
},
}
];
[filter? addTarget:movieWriter];? ? AVAsset* videoAsset = [AVAsset assetWithURL:InputURL];? ? AVAssetTrack *assetVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]firstObject];
movieWriter.transform = assetVideoTrack.preferredTransform;? ? //? ? [movie enableSynchronizedEncodingUsingMovieWriter:movieWriter];
[movieWriter startRecording];
[movieFile startProcessing];
[movieWriter setCompletionBlock:^{? ? ? ? dispatch_async(dispatch_get_main_queue(), ^{? ? ? ? ? ? NSLog(@"movieWriter Completion");
handler(outPutVideoUrl,1);
});
}];
}
+ (GPUImageFilterGroup*) addWatermarkWithResourcesNames:(NSArray* )resourcesNames Andframes:(NSArray*)frams AndTransform:(NSArray*)transforms AndLabelViews:(NSArray*)labelViews{
__block int currentPicIndex = 0;? CGFloat width = CGRectGetWidth([UIScreen mainScreen].bounds);? UIView* temp = [[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds];
[temp setContentScaleFactor:[[UIScreen mainScreen] scale]];
__block UIImageView* waterImageView1 = [[UIImageView alloc] init];
__block UIImageView* waterImageView2 = [[UIImageView alloc] init];
__block UIImageView* waterImageView3 = [[UIImageView alloc] init];? for (int index = 0 ; index < resourcesNames.count ; index++) {? ? if (index == 0) {
waterImageView1.frame = [frams[index] CGRectValue];? ? ? UIImage* tempImage = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];
waterImageView1.image = tempImage;
waterImageView1.transform = [transforms[index] CGAffineTransformValue];
[temp addSubview:waterImageView1];
[temp addSubview:labelViews[index]];
}else if (index == 1){
waterImageView2.frame = [frams[index] CGRectValue];? ? ? UIImage* tempImage = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];
waterImageView2.image = tempImage;
waterImageView2.transform = [transforms[index] CGAffineTransformValue];
[temp addSubview:waterImageView2];
[temp addSubview:labelViews[index]];
}else{
waterImageView3.frame = [frams[index] CGRectValue];? ? ? UIImage* tempImage = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];
waterImageView3.image = tempImage;
waterImageView3.transform = [transforms[index] CGAffineTransformValue];
[temp addSubview:waterImageView3];
[temp addSubview:labelViews[index]];
}
}
GPUImageFilterGroup* filterGroup = [[GPUImageFilterGroup alloc] init];
GPUImageUIElement *uiElement = [[GPUImageUIElement alloc] initWithView:temp];
GPUImageTwoInputFilter* blendFilter = [[GPUImageTwoInputFilter alloc] initWithFragmentShaderFromString:[WatermarkEngine loadShader:@"AlphaBlend_Normal" extension:@"frag"]];
GPUImageFilter* filter = [[GPUImageFilter alloc] init];
GPUImageFilter* uiFilter = [[GPUImageFilter alloc] init];
[uiElement addTarget:uiFilter];//? [uiFilter setInputRotation:kGPUImageRotateLeft atIndex:0];
[filter addTarget:blendFilter];
[uiFilter addTarget:blendFilter];
[filterGroup addFilter:filter];
[filterGroup addFilter:uiFilter];
[filterGroup addFilter:blendFilter];
[filterGroup setInitialFilters:@[filter]];
[filterGroup setTerminalFilter:blendFilter];? // 71
//? ? __unsafe_unretained typeof(self) this = self;
[filter setFrameProcessingCompletionBlock:^(GPUImageOutput * filter, CMTime frameTime) {
currentPicIndex += 1;? ?
for (int index = 0 ; index < resourcesNames.count ; index++) {? ? ? if (index == 0) {
waterImageView1.image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];
}else if (index == 1){
waterImageView2.image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];
}else{
waterImageView3.image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];
}
}? ?
if (currentPicIndex == 89) {
currentPicIndex = 0;
}
[uiElement update];
}];?
return filterGroup;
}
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+ (NSString * _Nonnull)loadShader:(NSString *)name extension:(NSString *)extenstion {? ? NSURL *url = [[NSBundle mainBundle] URLForResource:name withExtension:extenstion];? ? return [NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];
}
