mirror of
https://github.com/jwetzell/artnet-go.git
synced 2026-07-26 10:28:41 +00:00
Joel Wetzell
94 lines
2.1 KiB
Go
94 lines
2.1 KiB
Go
package artnet
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import (
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"encoding/binary"
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"errors"
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"slices"
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)
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type TodRequestCommand uint8
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const (
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TodFull TodRequestCommand = 0x00
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)
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type ArtTodRequest struct {
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filler1 uint8
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filler2 uint8
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spare1 uint8
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spare2 uint8
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spare3 uint8
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spare4 uint8
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spare5 uint8
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spare6 uint8
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spare7 uint8
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Net uint8
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Command TodRequestCommand
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Address []uint8
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}
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func (adr *ArtTodRequest) GetOpCode() uint16 {
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return OpTodRequest
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}
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func (adr *ArtTodRequest) UnmarshalBinary(data []byte) error {
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if len(data) < 32 {
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return errors.New("ArtTodRequest packet must be at least 32 bytes long")
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}
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if !slices.Equal(ArtNetID[:], data[0:8]) {
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return errors.New("ID does not match Art-Net ID")
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}
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opCode := binary.LittleEndian.Uint16(data[8:10])
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if opCode != OpTodRequest {
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return errors.New("packet does not have the correct OpCode for an ArtTodRequest packet")
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}
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offset := 12
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adr.filler1 = data[offset]
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adr.filler2 = data[offset+1]
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adr.spare1 = data[offset+2]
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adr.spare2 = data[offset+3]
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adr.spare3 = data[offset+4]
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adr.spare4 = data[offset+5]
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adr.spare5 = data[offset+6]
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adr.spare6 = data[offset+7]
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adr.spare7 = data[offset+8]
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adr.Net = data[offset+9]
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adr.Command = TodRequestCommand(data[offset+10])
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addCount := data[offset+11]
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adr.Address = make([]uint8, addCount)
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if len(data[offset+12:]) < int(addCount) {
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return errors.New("[]byte length not long enough to contain address length specified in packet")
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}
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copy(adr.Address, data[offset+12:offset+12+int(addCount)])
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return nil
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}
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func (adr *ArtTodRequest) MarshalBinary() ([]byte, error) {
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if len(adr.Address) > 32 {
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return nil, errors.New("address count must not be greater than 32")
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}
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data := make([]byte, 12+12+len(adr.Address))
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copy(data[0:8], ArtNetID[:])
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binary.LittleEndian.PutUint16(data[8:10], OpTodRequest)
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data[10] = 0
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data[11] = 14
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data[12] = adr.filler1
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data[13] = adr.filler2
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data[14] = adr.spare1
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data[15] = adr.spare2
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data[16] = adr.spare3
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data[17] = adr.spare4
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data[18] = adr.spare5
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data[19] = adr.spare6
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data[20] = adr.spare7
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data[21] = adr.Net
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data[22] = uint8(adr.Command)
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data[23] = uint8(len(adr.Address))
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copy(data[24:], adr.Address)
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return data, nil
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}
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