rtsp

const (
	FieldAccept            = "Accept"             // (R:opt.:entity)
	FieldAcceptEncoding    = "Accept-Encoding"    // (R:opt.:entity)
	FieldAcceptLanguage    = "Accept-Language"    // (R:opt.:all)
	FieldAllow             = "Allow"              // (R:opt.:all)
	FieldAuthorization     = "Authorization"      // (R:opt.:all)
	FieldBandwidth         = "Bandwidth"          // (R:opt.all)
	FieldBlocksize         = "Blocksize"          // (R:opt.:all but OPTIONS, TEARDOWN)
	FieldCacheControl      = "Cache-Control"      // (g:opt.:SETUP)
	FieldConference        = "Conference"         // (R:opt.:SETUP)
	FieldConnection        = "Connection"         // (g:req.:all)
	FieldContentBase       = "Content-Base"       // (e:opt.:entity)
	FieldContentEncoding   = "Content-Encoding"   // (e:req.:SET_PARAMETER ; e:req.:DESCRIBE, ANNOUNCE )
	FieldContentLanguage   = "Content-Language"   // (e:req.:DESCRIBE, ANNOUNCE)
	FieldContentLength     = "Content-Length"     // (e:req.:SET_PARAMETER, ANNOUNCE; e:req.:entity)
	FieldContentLocation   = "Content-Location"   // (e:opt.:entity)
	FieldContentType       = "Content-Type"       // (e:req.:SET_PARAMETER, ANNOUNCE; r:req.:entity )
	FieldCSeq              = "CSeq"               // (g:req.:all)
	FieldDate              = "Date"               // (g:opt.:all)
	FieldExpires           = "Expires"            // (e:opt.:DESCRIBE, ANNOUNCE)
	FieldFrom              = "From"               // (R:opt.:all)
	FieldIfModifiedSince   = "If-Modified-Since"  // (R:opt.:DESCRIBE, SETUP)
	FieldLastModified      = "Last-Modified"      // (e:opt.:entity)
	FieldProxyAuthenticate = "Proxy-Authenticate" //
	FieldProxyRequire      = "Proxy-Require"      // (R:req.:all)
	FieldPublic            = "Public"             // (r:opt.:all)
	FieldRange             = "Range"              // (R:opt.:PLAY, PAUSE, RECORD; r:opt.:PLAY, PAUSE, RECORD)
	FieldReferer           = "Referer"            // (R:opt.:all)
	FieldRequire           = "Require"            // (R:req.:all)
	FieldRetryAfter        = "Retry-After"        // (r:opt.:all)
	FieldRTPInfo           = "RTP-Info"           // (r:req.:PLAY)
	FieldScale             = "Scale"              // (Rr:opt.:PLAY, RECORD)
	FieldSession           = "Session"            // (Rr:req.:all but SETUP, OPTIONS)
	FieldServer            = "Server"             // (r:opt.:all)
	FieldSpeed             = "Speed"              // (Rr:opt.:PLAY)
	FieldTransport         = "Transport"          // (Rr:req.:SETUP)
	FieldUnsupported       = "Unsupported"        // (r:req.:all)
	FieldUserAgent         = "User-Agent"         // (R:opt.:all)
	FieldVia               = "Via"                // (g:opt.:all)
	FieldWWWAuthenticate   = "WWW-Authenticate"   // (r:opt.:all)
)

const (
	MethodOptions      = "OPTIONS"       // 查询命令支持情况(C->S, S->C)
	MethodDescribe     = "DESCRIBE"      // 获取媒体信息(C->S)
	MethodAnnounce     = "ANNOUNCE"      // 声明要push的媒体信息(方向：C->S, S->C)
	MethodSetup        = "SETUP"         // 构建传输会话，也可以调整传输参数(C->S);如果不允许调整，可以返回 455 错误
	MethodPlay         = "PLAY"          // 开始发送媒体数据(C->S)
	MethodPause        = "PAUSE"         // 暂停发送媒体数据(C->S)
	MethodTeardown     = "TEARDOWN"      // 关闭发送通道；关闭后需要重新执行 Setup 方法(C->S)
	MethodGetParameter = "GET_PARAMETER" // 获取参数；空body可作为心跳ping(C->S, S->C)
	MethodSetParameter = "SET_PARAMETER" // 设置参数，应该每次只设置一个参数(C->S, S->C)
	MethodRecord       = "RECORD"        // 启动录像(C->S)
	MethodRedirect     = "REDIRECT"      // 跳转(S->C)
)

const (
	StatusContinue = 100

	//======Success 2xx
	StatusOK                = 200
	StatusCreated           = 201 // only for RECORD
	StatusLowOnStorageSpace = 250 //only for RECORD

	//======Redirection 3xx
	StatusMultipleChoices  = 300
	StatusMovedPermanently = 301
	StatusMovedTemporarily = 302 // 和http不同
	StatusSeeOther         = 303
	StatusNotModified      = 304
	StatusUseProxy         = 305

	//======Client Error 4xx
	StatusBadRequest                = 400
	StatusUnauthorized              = 401
	StatusPaymentRequired           = 402
	StatusForbidden                 = 403
	StatusNotFound                  = 404
	StatusMethodNotAllowed          = 405
	StatusNotAcceptable             = 406
	StatusProxyAuthRequired         = 407
	StatusRequestTimeout            = 408
	StatusGone                      = 410
	StatusLengthRequired            = 411
	StatusPreconditionFailed        = 412 // only for DESCRIBE, SETUP
	StatusRequestEntityTooLarge     = 413
	StatusRequestURITooLong         = 414
	StatusUnsupportedMediaType      = 415
	StatusInvalidParameter          = 451 // only for SETUP
	StatusConferenceNotFound        = 452 // only for SETUP
	StatusNotEnoughBandwidth        = 453 // only for SETUP
	StatusSessionNotFound           = 454
	StatusMethodNotValidInThisState = 455
	StatusHeaderFieldNotValid       = 456
	StatusInvalidRange              = 457 // only for PLAY
	StatusParameterIsReadOnly       = 458 // only for SET_PARAMETER
	StatusAggregateOpNotAllowed     = 459
	StatusOnlyAggregateOpAllowed    = 460
	StatusUnsupportedTransport      = 461
	StatusDestinationUnreachable    = 462

	StatusInternalServerError     = 500
	StatusNotImplemented          = 501
	StatusBadGateway              = 502
	StatusServiceUnavailable      = 503
	StatusGatewayTimeout          = 504
	StatusRTSPVersionNotSupported = 505
	StatusOptionNotSupported      = 551 // 和 http 不同
)