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47 lines
1.3 KiB
Go
47 lines
1.3 KiB
Go
8 years ago
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package lc
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import (
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"fmt"
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"github.com/pd0mz/go-dmr/lc/serviceoptions"
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)
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// VoiceChannelUserPDU Conforms to ETSI TS 102-361-2 7.1.1.(1 and 2)
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type VoiceChannelUserPDU struct {
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ServiceOptions serviceoptions.ServiceOptions
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DstID uint32
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SrcID uint32
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}
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// ParseVoiceChannelUserPDU Parses either Group Voice Channel User or
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// Unit to Unit Channel User PDUs
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func ParseVoiceChannelUserPDU(data []byte) (*VoiceChannelUserPDU, error) {
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if len(data) != 7 {
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return nil, fmt.Errorf("dmr/lc/voicechanneluser: expected 7 bytes, got %d", len(data))
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}
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return &VoiceChannelUserPDU{
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ServiceOptions: serviceoptions.ParseServiceOptions(data[0]),
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DstID: uint32(data[1])<<16 | uint32(data[2])<<8 | uint32(data[3]),
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SrcID: uint32(data[4])<<16 | uint32(data[5])<<8 | uint32(data[6]),
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}, nil
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}
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// Bytes packs the Voice Channel User PDU message to bytes.
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func (v *VoiceChannelUserPDU) Bytes() []byte {
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return []byte{
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v.ServiceOptions.Byte(),
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uint8(v.DstID >> 16),
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uint8(v.DstID >> 8),
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uint8(v.DstID),
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uint8(v.SrcID >> 16),
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uint8(v.SrcID >> 8),
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uint8(v.SrcID),
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}
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}
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func (v *VoiceChannelUserPDU) String() string {
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return fmt.Sprintf("VoiceChannelUser: [ %d->%d, service options %s ]",
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v.SrcID, v.DstID, v.ServiceOptions.String())
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}
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