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{
"$schema": "http://json-schema.org/draft-07/schema#",
"$id": "https://something/streaming_schema.json",
"definitions": {
"ssrc": {"type": "integer", "minimum": 0, "maximum": 4294967295},
"delay": {"type": "integer", "minimum": 1, "maximum": 4000},
"resolution": {
"width": {"type": "integer", "minimum": 320},
"height": {"type": "integer", "minimum": 240}
},
"frame_rate": {
"type": "string",
"pattern": "[0-9]+(/[0-9]+)?",
"examples": ["30", "30000/1001"]
},
"dimensions": {
"allOf": [
{"$ref": "#/definitions/resolution"},
{"properties": {"frameRate": {"$ref": "#/definitions/frame_rate"}}}
]
},
"rtp_extensions": {
"type": "array",
"items": {"type": "string", "enum": ["adaptive_playout_delay"]}
},
"stream": {
"properties": {
"index": {"type": "integer", "minimum": 0},
"type": {"type": "string", "enum": ["audio_source", "video_source"]},
"codecName": {"type": "string", "enum": ["aac", "opus", "h264", "vp8", "hevc", "vp9", "av1"]},
"codecParameter": {"type": "string"},
"rtpProfile": {"type": "string", "enum": ["cast"]},
"rtpPayloadType": {"type": "integer", "minimum": 96, "maximum": 127},
"ssrc": {"$ref": "#/definitions/ssrc"},
"targetDelay": {"$ref": "#/definitions/delay"},
"aesKey": {"type": "string", "pattern": "[0-9a-fA-F]{32}"},
"aesIvMask": {"type": "string", "pattern": "[0-9a-fA-F]{32}"},
"receiverRtcpEventLog": {"type": "boolean"},
"receiverRtcpDscp": {"type": "integer", "minimum": 0, "default": 46},
"rtpExtensions": {"$ref": "#/definitions/rtp_extensions"},
"timeBase": {
"type": "string",
"pattern": "1/[0-9]+",
"default": "1/90000"
}
},
"required": [
"index",
"type",
"codecName",
"rtpPayloadType",
"ssrc",
"aesKey",
"aesIvMask",
"timeBase"
]
},
"audio_stream": {
"allOf": [
{"$ref": "#/definitions/stream"},
{
"properties": {
"bitRate": {"type": "integer", "minimum": 0},
"channels": {"type": "integer", "minimum": 1}
},
"required": ["bitRate", "channels"]
}
]
},
"video_stream": {
"allOf": [
{"$ref": "#/definitions/stream"},
{
"properties": {
"maxFrameRate": {"$ref": "#/definitions/frame_rate"},
"maxBitRate": {"type": "integer", "minimum": 0},
"resolutions": {
"type": "array",
"items": {"$ref": "#/definitions/resolution"}
},
"errorRecoveryMode": {
"type": "string",
"enum": ["castv2", "intra_mb_refresh"],
"default": "castv2"
}
},
"required": ["maxFrameRate", "maxBitRate", "resolutions"]
}
]
},
"offer": {
"properties": {
"supportedStreams": {
"type": "array",
"items": {"$ref": "#/definitions/stream"}
},
"castMode": {"type": "string", "enum": ["mirroring", "remoting"]},
"receiverStatus": {"type": "boolean"}
}
},
"audio_constraints": {
"properties": {
"maxSampleRate": {
"type": "integer",
"minimum": 16000,
"default": 48000,
"maximum": 96000
},
"maxChannels": {"type": "integer", "minimum": 1, "default": 2},
"minBitRate": {"type": "integer", "minimum": 32000, "maximum": 320000},
"maxBitRate": {"type": "integer", "minimum": 32000, "maximum": 320000},
"maxDelay": {"$ref": "#/definitions/delay"}
},
"required": ["maxSampleRate", "maxChannels", "maxBitRate"]
},
"video_constraints": {
"properties": {
"maxPixelsPerSecond": {"type": "number", "minimum": 0},
"minResolution": {"$ref": "#/definitions/resolution"},
"maxDimensions": {"$ref": "#/definitions/dimensions"},
"minBitRate": {"type": "integer", "minimum": 300000},
"maxBitRate": {"type": "integer", "minimum": 300000},
"maxDelay": {"$ref": "#/definitions/delay"}
},
"required": ["maxDimensions", "maxBitRate"]
},
"constraints": {
"properties": {
"audio": {"$ref": "#/definitions/audio_constraints"},
"video": {"$ref": "#/definitions/video_constraints"}
},
"required": ["audio", "video"]
},
"display": {
"$id": "#display",
"properties": {
"dimensions": {"$ref": "#/definitions/dimensions"},
"aspectRatio": {"type": "string", "pattern": "[0-9]+:[0-9]+"},
"scaling": {"type": "string", "enum": ["sender", "receiver"]}
},
"required": []
},
"error": {
"properties": {
"code": {"type": "integer"},
"description": {"type": "string"}
},
"required": ["code", "description"]
},
"answer": {
"type": "object",
"properties": {
"udpPort": {"type": "integer", "minimum": 1, "maximum": 65535},
"sendIndexes": {
"type": "array",
"items": {"type": "integer", "minimum": 0}
},
"ssrcs": {"type": "array", "items": {"$ref": "#/definitions/ssrc"}},
"constraints": {"$ref": "#/definitions/constraints"},
"display": {"$ref": "#/definitions/display"},
"receiverRtcpEventLog": {
"type": "array",
"items": {"type": "integer", "minimum": 0}
},
"receiverRtcpDscp": {
"type": "array",
"items": {"type": "integer", "minimum": 0}
},
"rtpExtensions": {"$ref": "#/definitions/rtp_extensions"}
},
"required": ["udpPort", "sendIndexes", "ssrcs"]
},
"capabilities": {
"$id": "#capabilities",
"type": "object",
"properties": {
"mediaCaps": {
"type": "array",
"items": {
"type": "string",
"enum": [
"audio",
"aac",
"opus",
"video",
"4k",
"h264",
"vp8",
"hevc",
"vp9"
]
}
},
"remoting": {"type": "integer"}
},
"required": ["mediaCaps"]
}
},
"type": "object",
"properties": {
"offer": {"$ref": "#/definitions/offer"},
"answer": {"$ref": "#/definitions/answer"},
"capabilities": {"$ref": "#/definitions/capabilities"},
"error": {"$ref": "#/definitions/error"},
"result": {"type": "string", "enum": ["ok", "error"]},
"seqNum": {"type": "integer", "minimum": 0},
"sessionId": {"type": "integer"},
"type": {
"type": "string",
"enum": [
"OFFER",
"ANSWER",
"GET_STATUS",
"STATUS_RESPONSE",
"GET_CAPABILITIES",
"CAPABILITIES_RESPONSE",
"RPC"
]
}
},
"required": ["type"],
"allOf": [
{
"if": {
"properties": {
"type": {
"enum": ["ANSWER", "CAPABILITIES_RESPONSE", "STATUS_RESPONSE"]
}
}
},
"then": {"required": ["result"]}
},
{
"if": {
"properties": {
"type": {
"enum": [
"OFFER",
"ANSWER",
"GET_CAPABILITIES",
"CAPABILITIES_RESPONSE",
"GET_STATUS",
"STATUS_RESPONSE"
]
}
}
},
"then": {"required": ["seqNum"]}
},
{
"if": {"properties": {"type": {"const": "OFFER"}}},
"then": {"required": ["offer"]}
},
{
"if": {
"properties": {"type": {"const": "ANSWER"}, "result": {"const": "ok"}}
},
"then": {"required": ["answer"]}
},
{
"if": {
"properties": {
"type": {"const": "CAPABILITIES_RESPONSE"},
"result": {"const": "ok"}
}
},
"then": {"required": ["capabilities"]}
},
{
"if": {
"properties": {"type": {"const": "RPC"}, "result": {"const": "ok"}}
},
"then": {"required": ["rpc"]}
}
]
}
|
