Initial clean commit

Example/SellyCloudSDK/Play/AVLiveStreamModel.h

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+//
+//  AVLiveStreamModel.h
+//  AVDemo
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface AVLiveStreamModel : NSObject
+
+@property (nonatomic, copy) NSString *vhost;
+@property (nonatomic, copy) NSString *app;
+@property (nonatomic, copy) NSString *stream;
+//如果该字段不为空，则为连麦pk房间
+@property (nonatomic, copy) NSString *stream_pk;
+@property (nonatomic, copy) NSString *url;
+@property (nonatomic, assign) NSTimeInterval startTime;
+@property (nonatomic, assign) NSTimeInterval duration;
+@property (nonatomic, copy) NSString *preview_image;  // 预览图 URL
+@property (nonatomic, copy) NSString *play_protocol;  // 播放协议：rtc, rtmp, flv, hls 等
+
+- (NSString *)displayName;
+- (NSString *)durationString;
+
+@end
+
+NS_ASSUME_NONNULL_END