结构体定义

## VideoLayer

```json
{
    "quality": "int", //0: "LOW",1: "MEDIUM",2: "HIGH",3: "OFF",
    "width": "uint32", // 视频宽度
    "height":"uint32", //视频高度
    "bitrate": "uint32", //target bitrate in bit per second (bps), server will measure actual
    "ssrc": "uint32", // 

}
```



## ParticipantPermission

```json
{
    "can_subscribe": "boolean",// 是否可订阅
    "can_publish":"boolean",// 是否可以发布
    "can_publish_data":"boolean",//是否可以发数据
    "can_publish_sources":"[]int32", // 可发布的源类型，可用的值有：0: "UNKNOWN",1: "CAMERA",2: "MICROPHONE",3: "SCREEN_SHARE",4: "SCREEN_SHARE_AUDIO",
    "hidden":"boolean",//是否可以隐藏
    "can_update_metadata":"boolean",//是否可以更新元数据
    "can_subscribe_metrics":"boolean",//是否可以订阅指标
}
```

## SimulcastCodecInfo

```json
{
    "mime_type":"string", //mime type of codec
    "mid":"string", // 
    "cid":"string", // 
    "layers": "[]VideoLayer"
}
```

## TimedVersion
```json
{
    "unix_micro":"int64", // Unix时间戳
    "ticks":"int32" 
}
```

## TrackInfo
流信息，source是track的输入，Meida Stream是track的集合

```json
{
    "sid": "string", // 轨道的唯一标识符
    "type": "string", // 轨道类型
    "muted": "boolean", // 是否静音
    "name": "string", // 轨道名称
    "width": "uint32", // 视频宽度
    "height":"uint32", //视频高度
    "simulcast":"boolean", //true if track is simulcasted
    "disable_dtx": "boolean", //true if DTX (Discontinuous Transmission) is disabled for audio
    "source": "int32",// 源类型，0: "UNKNOWN",1: "CAMERA",2: "MICROPHONE",3: "SCREEN_SHARE",4: "SCREEN_SHARE_AUDIO",
    "layers": "[]VideoLayer", 
    "mime_type":"string", //mime type of codec
    "mid":"string", // 
    "codecs": "[]SimulcastCodecInfo" , //SimulcastCodecInfo列表
    "stereo": "boolean",
    "disableRed":"boolean",
    "encryption":"int32",//加密类型，0: "NONE",1: "GCM",2: "CUSTOM",
    "stream":"string",// 流名称
    "version":"TimedVersion",
    "audio_features":"int32",//音频功能，0: "TF_STEREO",1: "TF_NO_DTX",2: "TF_AUTO_GAIN_CONTROL",3: "TF_ECHO_CANCELLATION",4: "TF_NOISE_SUPPRESSION",5: "TF_ENHANCED_NOISE_CANCELLATION"
}
```

## ParticipantInfo
用户信息

```json
{
    "sid": "string", // 参与者的唯一标识符
    "identity": "string", // 参与者的ID
    "state": "int32", // 参与者的状态，0: "JOINING",1: "JOINED",2: "ACTIVE",3: "DISCONNECTED",
    "tracks": "[]TrackInfo", // 
    "metadata": "string", // 元数据
    "joined_at": "number", // 加入时间
    "is_speaking": "boolean", // 是否正在讲话
    "permission": "ParticipantPermission",// 权限
    "is_publisher":"boolean", // 是否是发布者
    "name": "string", // 名称
    "version": "string", // 版本
    "region": "string", // 区域
    "kind": "string" // 类型
}
```

## Room
房间信息

```json
{
    "sid": "string", // 房间的唯一标识符
    "name": "string", // 房间的名称
    "empty_timeout": "uint32", // 空房间关闭前的持续时间（以秒为单位）
    "departure_timeout": "uint32", // 参与者被认为离开的持续时间（以秒为单位）
    "max_participants": "uint32", // 房间允许的最大参与者数量
    "creation_time": "int64", // 房间创建时的时间戳
    "turn_password": "string", // 用于TURN服务器认证的密码
    "enabled_codecs": "[]Codec", // 房间启用的编解码器列表
    "metadata": "string", // 房间的附加信息
    "num_participants": "uint32", // 房间当前的参与者数量
    "num_publishers": "uint32", // 房间当前的发布者数量
    "active_recording": "boolean", // 房间是否正在录制
    "version": "TimedVersion" // 房间的版本信息
}
```