//
//  XHMessageVideoConverPhotoFactory.m
//  MessageDisplayExample
//
//  Created by HUAJIE-1 on 14-5-9.
//  Copyright (c) 2014年 嗨，我是曾宪华(@xhzengAIB)，曾加入YY Inc.担任高级移动开发工程师，拍立秀App联合创始人，热衷于简洁、而富有理性的事物 QQ:543413507 主页:http://zengxianhua.com All rights reserved.
//

#import "XHMessageVideoConverPhotoFactory.h"
#import <AVFoundation/AVAsset.h>
#import <AVFoundation/AVAssetImageGenerator.h>
#import "XHMacro.h"

@implementation XHMessageVideoConverPhotoFactory

+ (UIImage *)videoConverPhotoWithVideoPath:(NSString *)videoPath {
    if (!videoPath)
        return nil;
    AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:[NSURL fileURLWithPath:videoPath] options:nil];
    NSParameterAssert(asset);
    AVAssetImageGenerator *assetImageGenerator = [[AVAssetImageGenerator alloc] initWithAsset:asset];
    assetImageGenerator.appliesPreferredTrackTransform = YES;
    assetImageGenerator.apertureMode = AVAssetImageGeneratorApertureModeEncodedPixels;
    
    CGImageRef thumbnailImageRef = NULL;
    CFTimeInterval thumbnailImageTime = 0;
    NSError *thumbnailImageGenerationError = nil;
    thumbnailImageRef = [assetImageGenerator copyCGImageAtTime:CMTimeMake(thumbnailImageTime, 60) actualTime:NULL error:&thumbnailImageGenerationError];
    
    if (!thumbnailImageRef)
        DLog(@"thumbnailImageGenerationError %@", thumbnailImageGenerationError);
    
    UIImage *thumbnailImage = thumbnailImageRef ? [[UIImage alloc] initWithCGImage:thumbnailImageRef] : nil;
    
    CGImageRelease(thumbnailImageRef);
    
    return thumbnailImage;
}

@end