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@@ -1,194 +0,0 @@
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-//
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-// AliAssetImageGenerator.m
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-// AlivcSceneDemo
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-//
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-// Created by Worthy on 2017/7/25.
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-// Copyright © 2017年 Worthy. All rights reserved.
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-//
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-
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-#import "AliAssetImageGenerator.h"
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-
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-
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-@interface AliAssetImageGenerator ()
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-@property (nonatomic, strong) NSMutableArray<AliAssetInfo *> *assets;
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-
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-@property (nonatomic, assign) BOOL shouldCancel;
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-@property (nonatomic, strong) dispatch_queue_t queue;
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-@end
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-
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-
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-@implementation AliAssetImageGenerator
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-
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--(instancetype)init {
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- self = [super init];
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- if (self) {
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- _assets = [NSMutableArray array];
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- _imageCount = 8;
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- _outputSize = CGSizeMake(200,200);
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- _duration = 0;
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- }
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- return self;
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-}
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-
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--(void)addImageWithPath:(NSString *)path duration:(CGFloat)duration animDuration:(CGFloat)animDuration {
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- AliAssetInfo *info = [[AliAssetInfo alloc] init];
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- info.path = path;
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- info.duration = duration;
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- info.animDuration = animDuration;
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- info.type = AliAssetInfoTypeImage;
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- [_assets addObject:info];
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- _duration += [info realDuration];
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-}
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-
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--(void)addVideoWithPath:(NSString *)path startTime:(CGFloat)startTime duration:(CGFloat)duration animDuration:(CGFloat)animDuration {
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- AliAssetInfo *info = [[AliAssetInfo alloc] init];
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- info.path = path;
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- info.duration = duration;
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- info.animDuration = animDuration;
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- info.startTime = startTime;
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- info.type = AliAssetInfoTypeVideo;
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- [_assets addObject:info];
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- _duration += [info realDuration];
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-}
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-
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--(void)generateWithCompleteHandler:(void(^)(UIImage *))handler {
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- _shouldCancel = NO;
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- _queue = dispatch_queue_create("com.ali.thumb.generator", NULL);
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- //new
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- dispatch_async(_queue, ^{
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-
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- for (int imageIndex = 0; imageIndex < _imageCount; imageIndex++) {
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- CGFloat currentImageDuration = imageIndex * _timePerImage; //当前图片对应的时间节点
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-
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- CGFloat totalInfoDuration = 0; //资源的在总的里面的时间节点
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- for (int infoIndex = 0; infoIndex < _assets.count; infoIndex ++) {
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- AliAssetInfo *info = _assets[infoIndex];
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- CGFloat currentInfoDuration = [info realDuration]; //当前资源的时间
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- CGFloat preSourceTotalTime = totalInfoDuration;//当前资源之前的资源加起来的总时间
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- totalInfoDuration = totalInfoDuration + currentInfoDuration;
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- if (currentImageDuration < totalInfoDuration) {
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- CGFloat relaTimeInCurrentInfo = currentImageDuration - preSourceTotalTime; // 图片在当前资源里的实际时间
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- UIImage *image = [info captureImageAtTime:relaTimeInCurrentInfo outputSize:_outputSize];
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- handler(image);
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- break;
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- }
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- if (_shouldCancel) {
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- break;
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- }
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-
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- }
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- }
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- });
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-}
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-
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--(void)cancel {
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- _shouldCancel = YES;
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-}
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-
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-+ (UIImage*) thumbnailImageForVideo:(NSURL *)videoURL atTime:(NSTimeInterval)time {
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-
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- AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoURL options:nil];
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- NSParameterAssert(asset);
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- AVAssetImageGenerator *assetImageGenerator =[[AVAssetImageGenerator alloc] initWithAsset:asset];
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- assetImageGenerator.appliesPreferredTrackTransform = YES;
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- assetImageGenerator.maximumSize = CGSizeMake(300, 300);
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- assetImageGenerator.apertureMode = AVAssetImageGeneratorApertureModeEncodedPixels;
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-
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-
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- CGImageRef thumbnailImageRef = NULL;
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- CFTimeInterval thumbnailImageTime = time;
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- NSError *thumbnailImageGenerationError = nil;
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- thumbnailImageRef = [assetImageGenerator copyCGImageAtTime:CMTimeMake(thumbnailImageTime, 60)actualTime:NULL error:&thumbnailImageGenerationError];
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-
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- if(!thumbnailImageRef) {
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- NSLog(@"thumbnailImageGenerationError %@",thumbnailImageGenerationError);
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- }
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- UIImage*thumbnailImage = thumbnailImageRef ? [[UIImage alloc]initWithCGImage: thumbnailImageRef] : nil;
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-
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- return thumbnailImage;
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-}
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-
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-
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-@end
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-
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-#pragma mark - AliAssetInfo Class
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-
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-@interface AliAssetInfo ()
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-@property (nonatomic, strong) AVAssetImageGenerator *generator;
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-@end
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-
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-@implementation AliAssetInfo
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-
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--(CGFloat)realDuration {
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- return _duration - _animDuration;
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-}
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-
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-- (UIImage *)captureImageAtTime:(CGFloat)time outputSize:(CGSize)outputSize {
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- if (_type == AliAssetInfoTypeImage) {
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- return [self imageFromImageWithOutputSize:outputSize];
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- }else {
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- return [self imageFromVideoWithOutputSize:outputSize atTime:time];
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- }
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-
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-}
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-
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-- (UIImage *)imageFromImageWithOutputSize:(CGSize)outputSize {
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- UIImage *image = [UIImage imageWithContentsOfFile:_path];
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- CGFloat imageRatio = image.size.width / image.size.height;
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- if (image.size.width > image.size.height) {
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- outputSize.height = outputSize.width / imageRatio;
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- } else {
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- outputSize.width = outputSize.height * imageRatio;
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- }
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-
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- UIGraphicsBeginImageContext(outputSize);
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- [image drawInRect:CGRectMake(0, 0, outputSize.width, outputSize.height)];
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- UIImage *picture = UIGraphicsGetImageFromCurrentImageContext();
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- UIGraphicsEndImageContext();
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- return picture;
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-}
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-
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-- (UIImage *)imageFromVideoWithOutputSize:(CGSize)outputSize atTime:(CGFloat)atTime {
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- if (!_generator) {
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-// _generator = [[AVAssetImageGenerator alloc] initWithAsset:[self composition]];
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- AVURLAsset *asset = [[AVURLAsset alloc]initWithURL:[NSURL fileURLWithPath:_path] options:nil];
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- _generator = [[AVAssetImageGenerator alloc]initWithAsset:asset];
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- _generator.maximumSize = outputSize;
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- _generator.appliesPreferredTrackTransform = YES;
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-// _generator.requestedTimeToleranceAfter = kCMTimeZero;
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-// _generator.requestedTimeToleranceBefore = kCMTimeZero;
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- }
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- if (atTime < 0) {
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- atTime = 0;
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- }
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- CMTime time = CMTimeMake(atTime * 1000, 1000);
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- CGImageRef image = [_generator copyCGImageAtTime:time actualTime:NULL error:nil];
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- UIImage *picture = [UIImage imageWithCGImage:image];
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- CGImageRelease(image);
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- return picture;
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-}
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-
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-
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--(AVComposition *)composition {
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- AVMutableComposition *composition = [AVMutableComposition composition];
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- AVMutableCompositionTrack *compositionVideoTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
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- AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL fileURLWithPath:_path] options:nil];
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- AVAssetTrack *assetTrackVideo = nil;
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- if ([[asset tracksWithMediaType:AVMediaTypeVideo] count] != 0) {
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- assetTrackVideo = [asset tracksWithMediaType:AVMediaTypeVideo][0];
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- }
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- if (assetTrackVideo) {
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- CMTime start = CMTimeMake((_startTime-_animDuration)*1000, 1000);
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- CMTime duration = assetTrackVideo.timeRange.duration;
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- if (_duration) {
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- duration = CMTimeMake(_duration * 1000, 1000);
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- }
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- [compositionVideoTrack insertTimeRange:CMTimeRangeMake(start, duration) ofTrack:assetTrackVideo atTime:kCMTimeZero error:nil];
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- compositionVideoTrack.preferredTransform = assetTrackVideo.preferredTransform;
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- return composition;
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- }
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- return nil;
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-}
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-
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-
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-@end
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Chris