VideoHelperViewController.m

//
//  VideoHelperViewController.m
//  Lighting
//
//  Created by 曹云霄 on 2016/11/25.
//  Copyright © 2016年 上海勾芒科技有限公司. All rights reserved.
//

#import "VideoHelperViewController.h"
#import "VIMediaCache.h"


@interface VideoHelperViewController ()

@property (nonatomic,strong) AVPlayer *customPlayer;
@property (nonatomic,strong) AVPlayerItem *playerItem;
@property (nonatomic,strong) id avplayerServer;
@property (nonatomic,strong) VIResourceLoaderManager *resourceLoaderManager;

/**
 导航栏、工具类是否隐藏
 */
@property (nonatomic,assign) BOOL toolNaviViewIsHide;

@end

@implementation VideoHelperViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self uiConfigAction];
    [self setUpAVPlayer];
    [self addAVPlayerKVO];
    [self addProgressObserver];
}

#pragma mark - UI
- (void)uiConfigAction
{
    self.videoNavigationView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5];
    self.videoToolView.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:0.5];
    [self.view addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideOrShowNavigationBarAndToolBar)]];
}

#pragma mark - SetUp AVPlayer
- (void)setUpAVPlayer
{
    VIResourceLoaderManager *resourceLoaderManager = [VIResourceLoaderManager new];
    self.resourceLoaderManager = resourceLoaderManager;
    self.playerItem = [resourceLoaderManager playerItemWithURL:[NSURL URLWithString:self.videoUrl]];
    VICacheConfiguration *configuration = [VICacheManager cacheConfigurationForURL:[NSURL URLWithString:self.videoUrl]];
    if (configuration.progress >= 1.0) {
        NSLog(@"缓存完成");
    }
    self.customPlayer = [[AVPlayer alloc] initWithPlayerItem:_playerItem];
    self.playerLayer = [AVPlayerLayer playerLayerWithPlayer:_customPlayer];
    self.playerLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
    self.playerLayer.frame = CGRectMake(0, 0, ScreenWidth*2/3, ScreenHeight/2);
    [self.view.layer insertSublayer:self.playerLayer atIndex:0];
    [self CreateMBProgressHUDLoding];
    //设置静音模式播放声音
    AVAudioSession * session = [AVAudioSession sharedInstance];
    [session setCategory:AVAudioSessionCategoryPlayback error:nil];
    [session setActive:YES error:nil];
}

#pragma mark - AVPlayer KVO
- (void)addAVPlayerKVO
{
    //播放状态属性
    [self.playerItem addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:nil];
    //监控网络加载情况属性
    [self.playerItem addObserver:self forKeyPath:@"loadedTimeRanges" options:NSKeyValueObservingOptionNew context:nil];
    //给AVPlayerItem添加播放完成通知
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playFinish) name:AVPlayerItemDidPlayToEndTimeNotification object:nil];
}

#pragma mark -KVO回调
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context{
    if ([keyPath isEqualToString:@"status"]) {//播放状态
        NSInteger status = [[change objectForKey:NSKeyValueChangeNewKey] integerValue];
        switch (status) {
            case AVPlayerStatusFailed:
                [self ErrorMBProgressView:@"播放失败"];
                break;
            case AVPlayerStatusReadyToPlay://正在播放
                [self RemoveMBProgressHUDLoding];
                self.playItemTotalTimeLabel.text = [NSString stringWithFormat:@"/ %@",[self convertTime:CMTimeGetSeconds(self.playerItem.duration)]];
                break;
            default:
                break;
        }
    }else if ([keyPath isEqualToString:@"loadedTimeRanges"]){//缓冲
        NSTimeInterval timeInterval = [self availableDuration];// 计算缓冲进度
        if (timeInterval > self.getCurrentPlayingTime+5){ // 缓存 大于 播放 当前时长+5
            [self.customPlayer play];
        }
    }
}

#pragma mark - 返回当前视频播放时长
- (double)getCurrentPlayingTime{
    return self.customPlayer.currentTime.value/self.customPlayer.currentTime.timescale;
}

#pragma mark - 返回当前视频缓存时长
- (NSTimeInterval)availableDuration{
    NSArray *loadedTimeRanges = [[self.customPlayer currentItem] loadedTimeRanges];
    CMTimeRange timeRange = [loadedTimeRanges.firstObject CMTimeRangeValue];// 获取缓冲区域
    float startSeconds = CMTimeGetSeconds(timeRange.start);
    float durationSeconds = CMTimeGetSeconds(timeRange.duration);
    NSTimeInterval result = startSeconds + durationSeconds;// 计算缓冲总进度
    return result;
}

#pragma mark -播放进度条更新
-(void)addProgressObserver {
    
    WS(weakSelf);
    AVPlayerItem *playerItem = self.customPlayer.currentItem;
    self.avplayerServer = [self.customPlayer addPeriodicTimeObserverForInterval:CMTimeMake(1.0, 1.0) queue:dispatch_get_main_queue() usingBlock:^(CMTime time){
        float current = CMTimeGetSeconds(time);
        float total = CMTimeGetSeconds(playerItem.duration);
        //更新进度条
        float progress = current/total;
        weakSelf.bufferProgressView.progress = progress;
        //更新播放时间
        CMTime ctime = weakSelf.customPlayer.currentTime;
        weakSelf.playingTimeLabel.text = [weakSelf convertTime:ctime.value/ctime.timescale];
    }];
}

#pragma mark - 隐藏(显示)状态栏、工具栏
- (void)hideOrShowNavigationBarAndToolBar
{
    WS(weakSelf);
    [UIView animateWithDuration:0.4 animations:^{
        weakSelf.videoNavigationView.alpha = weakSelf.toolNaviViewIsHide?1:0;
        weakSelf.videoToolView.alpha = weakSelf.toolNaviViewIsHide?1:0;
        
    }completion:^(BOOL finished) {
        weakSelf.toolNaviViewIsHide = !weakSelf.toolNaviViewIsHide;
    }];
}

#pragma mark -计算时间
- (NSString *)convertTime:(CGFloat)second
{
    NSDate *date = [NSDate dateWithTimeIntervalSince1970:second];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    if (second/3600 >= 1) {
        [formatter setDateFormat:@"HH:mm:ss"];
    } else {
        [formatter setDateFormat:@"mm:ss"];
    }
    NSString *showtimeNew = [formatter stringFromDate:date];
    return showtimeNew;
}

#pragma mark - 播放完成
- (void)playFinish
{
    [self.customPlayer seekToTime:kCMTimeZero];
    self.playButton.selected = YES;
}

#pragma mark - 播放、暂停
- (IBAction)playOrPauseButtonClickAction:(UIButton *)sender {
    
    sender.selected = !sender.selected;
    if (sender.selected) {
        [self.customPlayer pause];
    }else {
        [self.customPlayer play];
    }
}

#pragma mark - 退出播放
- (IBAction)exitPlayControllerButtonClick:(UIButton *)sender {
    [self.customPlayer pause];
    [self.navigationController popViewControllerAnimated:YES];
}

#pragma mark - 后退5秒
- (IBAction)backFiveSecondButtnClick:(UIButton *)sender {
    
    [self.customPlayer seekToTime:CMTimeMake(5, 1)];
}

#pragma mark - 放大缩小按钮
- (IBAction)zoomButtonClick:(UIButton *)sender {
    
    sender.selected = !sender.selected;
    if (self.zoomButtonClickBlock) {
        self.zoomButtonClickBlock(sender.selected);
    }
}

#pragma mark - 页面消失后释放播放器
- (void)viewDidDisappear:(BOOL)animated
{
    [self.customPlayer pause];
    [self.customPlayer.currentItem cancelPendingSeeks];
    [self.customPlayer.currentItem.asset cancelLoading];
}

#pragma mark - 释放KVO
- (void)dealloc
{
    [self.playerItem removeObserver:self forKeyPath:@"status"];
    [self.playerItem removeObserver:self forKeyPath:@"loadedTimeRanges"];
    [self.customPlayer removeTimeObserver:self.avplayerServer];
}


@end