JSJP_Student/jiaPei/Utils/Manager/MusicManager/RQMusicManager.m

//
//  RQMusicManager.m
//  JSJP
//
//  Created by 张嵘 on 2021/8/17.
//

#import "RQMusicManager.h"

static void *kStatusKVOKey = &kStatusKVOKey;
static void *kDurationKVOKey = &kDurationKVOKey;
static void *kBufferingRatioKVOKey = &kBufferingRatioKVOKey;

@interface RQMusicManager ()
@property (nonatomic, readwrite, strong) DOUAudioStreamer *streamer;
@property (nonatomic, readwrite, copy) DOUAudioStreamerStatusBlock audioStreamerStatusBlock;
@property (nonatomic, readwrite, copy) NSString  *urlString;

@end


@implementation RQMusicManager
@def_singleton(RQMusicManager);

- (void)rq_cancelStreamer {
    if (_streamer != nil) {
        [_streamer pause];
        if (self.audioStreamerStatusBlock) {
            self.audioStreamerStatusBlock(DOUAudioStreamerPaused);
        }
        [_streamer removeObserver:self forKeyPath:@"status"];
        [_streamer removeObserver:self forKeyPath:@"duration"];
        [_streamer removeObserver:self forKeyPath:@"bufferingRatio"];
        _streamer = nil;
        _urlString = nil;
    }
}

- (void)rq_resetStreamer {
    [self rq_cancelStreamer];
    RQTrack *track = [[RQTrack alloc] init];
    self.urlString = track.audioFileURL.path;
    
    _streamer = [DOUAudioStreamer streamerWithAudioFile:track];
    [_streamer addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:kStatusKVOKey];
    [_streamer addObserver:self forKeyPath:@"duration" options:NSKeyValueObservingOptionNew context:kDurationKVOKey];
    [_streamer addObserver:self forKeyPath:@"bufferingRatio" options:NSKeyValueObservingOptionNew context:kBufferingRatioKVOKey];
    
    [_streamer play];
    
    [self rq_setupHintForStreamer];
}

- (void)rq_resetStreamerWithURLString:(NSString *)urlString {
    [self rq_cancelStreamer];
    RQTrack *track = [[RQTrack alloc] init];
    track.audioFileURL = [NSURL URLWithString:urlString];
    self.urlString = urlString;
    
    _streamer = [DOUAudioStreamer streamerWithAudioFile:track];
    [_streamer addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:kStatusKVOKey];
    [_streamer addObserver:self forKeyPath:@"duration" options:NSKeyValueObservingOptionNew context:kDurationKVOKey];
    [_streamer addObserver:self forKeyPath:@"bufferingRatio" options:NSKeyValueObservingOptionNew context:kBufferingRatioKVOKey];
    
    [_streamer play];
    
    [self rq_setupHintForStreamer];
}

- (void)rq_resetStreamerWithURLString:(NSString *)urlString DOUAudioStreamerStatusBlock:(DOUAudioStreamerStatusBlock)audioStreamerStatusBlock {
    dispatch_async_on_main_queue(^{
        _audioStreamerStatusBlock = nil;
        _audioStreamerStatusBlock = audioStreamerStatusBlock;
        [self rq_cancelStreamer];
        RQTrack *track = [[RQTrack alloc] init];
        track.audioFileURL = [NSURL URLWithString:urlString];
        self.urlString = urlString;
        
        _streamer = [DOUAudioStreamer streamerWithAudioFile:track];
        [_streamer addObserver:self forKeyPath:@"status" options:NSKeyValueObservingOptionNew context:kStatusKVOKey];
        [_streamer addObserver:self forKeyPath:@"duration" options:NSKeyValueObservingOptionNew context:kDurationKVOKey];
        [_streamer addObserver:self forKeyPath:@"bufferingRatio" options:NSKeyValueObservingOptionNew context:kBufferingRatioKVOKey];
        
        [_streamer play];
        
        [self rq_setupHintForStreamer];
    });
}

- (void)rq_resetStreamerWithDOUAudioStreamerStatusBlock:(DOUAudioStreamerStatusBlock)audioStreamerStatusBlock {
    _audioStreamerStatusBlock = nil;
    _audioStreamerStatusBlock = audioStreamerStatusBlock;
    [self rq_resetStreamer];
}

- (void)rq_setupHintForStreamer {
    [DOUAudioStreamer setHintWithAudioFile:self.audioTrack];
}

- (void)_updateStatus {
    if (self.audioStreamerStatusBlock) {
        self.audioStreamerStatusBlock([_streamer status]);
    }
    switch ([_streamer status]) {
        case DOUAudioStreamerPlaying:
            
            break;
            
        case DOUAudioStreamerPaused:
            
            break;
            
        case DOUAudioStreamerIdle:
            
            break;
            
        case DOUAudioStreamerFinished:
            
            break;
            
        case DOUAudioStreamerBuffering:
            
            break;
            
        case DOUAudioStreamerError:
            NSLog(@"%@",@"DOUAudioStreamerError");
            break;
    }
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    if (context == kStatusKVOKey) {
        [self performSelector:@selector(_updateStatus)
                     onThread:[NSThread mainThread]
                   withObject:nil
                waitUntilDone:NO];
    } else if (context == kDurationKVOKey) {
        
    } else if (context == kBufferingRatioKVOKey) {
        
    } else {
        [super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
    }
}

- (RQTrack *)audioTrack {
    if (!_audioTrack) {
        _audioTrack = [[RQTrack alloc] init];
    }
    return _audioTrack;
}
@end