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76 lines
2.2 KiB
Go
76 lines
2.2 KiB
Go
package dmr
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import (
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"bytes"
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"github.com/pd0mz/go-dmr/bit"
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)
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// Table 9.2: SYNC Patterns
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const (
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SyncPatternBSSourcedVoice uint16 = 1 << iota
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SyncPatternBSSourcedData
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SyncPatternMSSourcedVoice
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SyncPatternMSSourcedData
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SyncPatternMSSourcedRC
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SyncPatternDirectVoiceTS1
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SyncPatternDirectDataTS1
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SyncPatternDirectVoiceTS2
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SyncPatternDirectDataTS2
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SyncPatternUnknown
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)
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var (
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bsSourcedVoice = []byte{0x75, 0x5f, 0xd7, 0xdf, 0x75, 0xf7}
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bsSourcedData = []byte{0xdf, 0xf5, 0x7d, 0x75, 0xdf, 0x5d}
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msSourcedVoice = []byte{0x7f, 0x7d, 0x5d, 0xd5, 0x7d, 0xfd}
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msSourcedData = []byte{0xd5, 0xd7, 0xf7, 0x7f, 0xd7, 0x57}
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msSourcedRC = []byte{0x77, 0xd5, 0x5f, 0x7d, 0xfd, 0x77}
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directVoiceTS1 = []byte{0x5d, 0x57, 0x7f, 0x77, 0x57, 0xff}
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directDataTS1 = []byte{0xf7, 0xfd, 0xd5, 0xdd, 0xfd, 0x55}
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directVoiceTS2 = []byte{0x7d, 0xff, 0xd5, 0xf5, 0x5d, 0x5f}
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directDataTS2 = []byte{0xd7, 0x55, 0x7f, 0x5f, 0xf7, 0xf5}
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SyncPatternName = map[uint16]string{
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SyncPatternBSSourcedVoice: "bs sourced voice",
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SyncPatternBSSourcedData: "bs sourced data",
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SyncPatternMSSourcedVoice: "ms sourced voice",
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SyncPatternMSSourcedData: "ms sourced data",
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SyncPatternMSSourcedRC: "ms sourced rc",
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SyncPatternDirectVoiceTS1: "direct voice ts1",
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SyncPatternDirectDataTS1: "direct data ts1",
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SyncPatternDirectVoiceTS2: "direct voice ts2",
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SyncPatternDirectDataTS2: "direct data ts2",
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SyncPatternUnknown: "unknown",
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}
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)
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func ExtractSyncBits(payload bit.Bits) bit.Bits {
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return payload[108:156]
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}
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func SyncPattern(bits bit.Bits) uint16 {
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var b = bits.Bytes()
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switch {
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case bytes.Equal(b, bsSourcedVoice):
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return SyncPatternBSSourcedVoice
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case bytes.Equal(b, bsSourcedData):
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return SyncPatternBSSourcedData
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case bytes.Equal(b, msSourcedVoice):
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return SyncPatternMSSourcedVoice
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case bytes.Equal(b, msSourcedData):
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return SyncPatternMSSourcedData
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case bytes.Equal(b, msSourcedRC):
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return SyncPatternMSSourcedRC
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case bytes.Equal(b, directVoiceTS1):
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return SyncPatternDirectVoiceTS1
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case bytes.Equal(b, directDataTS1):
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return SyncPatternDirectDataTS1
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case bytes.Equal(b, directVoiceTS2):
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return SyncPatternDirectVoiceTS2
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case bytes.Equal(b, directDataTS2):
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return SyncPatternDirectDataTS2
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default:
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return SyncPatternUnknown
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}
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}
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