gurix
eb36587ccf
- Add Group string field to FreqConfig struct (GRP-04)
- Add frequency allocation table comment (32 slots, 65-2449 Hz, FREQ-03)
- Rebalance all 14 ClassFreqConfigs entries to major-second ladder (FREQ-01)
- Infrastructure band (Triangle, 65-133 Hz): ICMP/NTP/DHCP/DNS
- Web band (Sawtooth, 150-169 Hz): HTTPS/HTTP
- Mail band (Triangle, 214 Hz): SMTP
- Remote Access band (Square, 343 Hz): SSH
- Unknown band (Custom, 771-1375 Hz): Unknown1-4, OtherTCP, OtherUDP
- Remove stale NumLayers and GainPerLayer constants (Phase 8 cleanup)
- Non-Unknown entries use WaveformPresetHarmonics; Unknown retain hand-tuned {1,1.0},{2,0.8},{3,0.4}
216 lines
8.3 KiB
Go
216 lines
8.3 KiB
Go
package synth
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import "github.com/netsynth/netsynth/classify"
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const (
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SampleRate = 44100 // D-13: CD quality
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WindowMs = 500 // matches aggregate.DefaultWindowMs
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SamplesPerWindow = SampleRate * WindowMs / 1000 // 22050
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WhisperFloor = 0.03 // D-08/D-09: 3% of max amplitude
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)
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// WaveformType selects the harmonic preset for a synthesis layer.
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// The zero value WaveformCustom preserves existing hand-tuned harmonics in FreqConfig.Harmonics.
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type WaveformType int
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const (
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WaveformCustom WaveformType = iota // zero value: use FreqConfig.Harmonics as-is
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WaveformSine // pure fundamental, single harmonic
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WaveformSquare // odd harmonics with 1/k amplitude (bandlimited)
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WaveformSawtooth // all harmonics with 1/k amplitude (bandlimited)
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WaveformTriangle // odd harmonics with alternating 1/k^2 amplitude (bandlimited)
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)
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// WaveformPresetHarmonics returns the bandlimited harmonic series for the given waveform type
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// at the given base frequency and sample rate. Returns nil for WaveformCustom.
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// All returned harmonics are below Nyquist (sampleRate/2).
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func WaveformPresetHarmonics(wt WaveformType, baseHz float64, sampleRate int) []HarmonicDef {
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nyquist := float64(sampleRate) / 2.0
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switch wt {
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case WaveformCustom:
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return nil
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case WaveformSine:
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return []HarmonicDef{{Ratio: 1, Amplitude: 1.0}}
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case WaveformSquare:
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var harmonics []HarmonicDef
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for k := 1; float64(k)*baseHz < nyquist; k += 2 {
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harmonics = append(harmonics, HarmonicDef{Ratio: k, Amplitude: 1.0 / float64(k)})
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}
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return harmonics
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case WaveformSawtooth:
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var harmonics []HarmonicDef
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for k := 1; float64(k)*baseHz < nyquist; k++ {
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harmonics = append(harmonics, HarmonicDef{Ratio: k, Amplitude: 1.0 / float64(k)})
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}
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return harmonics
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case WaveformTriangle:
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var harmonics []HarmonicDef
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sign := 1.0
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for k := 1; float64(k)*baseHz < nyquist; k += 2 {
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harmonics = append(harmonics, HarmonicDef{Ratio: k, Amplitude: sign / float64(k*k)})
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sign = -sign
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}
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return harmonics
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default:
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return nil
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}
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}
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// HarmonicDef defines one partial in an additive synthesizer.
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type HarmonicDef struct {
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Ratio int // harmonic number: 1=fundamental, 2=octave, 3=fifth+octave, etc.
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Amplitude float64 // relative weight
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}
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// FreqConfig holds synthesis parameters for one traffic class.
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type FreqConfig struct {
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BaseHz float64
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Harmonics []HarmonicDef
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Pan float64 // [-1, 1]: -1=full left, 0=center, +1=full right
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WaveformType WaveformType // zero value WaveformCustom uses Harmonics as-is
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Group string // sound family: "Infrastructure", "Web", "Mail", "Remote Access", "Unknown", etc.
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}
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// Frequency Allocation Table (Phase 9 design — major-second ladder, 65-2449 Hz)
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//
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// Slot Hz Class Group Waveform Pan
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// 0 65 ICMP Infrastructure Triangle -0.3
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// 1 73 NTP Infrastructure Triangle -0.1
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// 2 82 DHCP Infrastructure Triangle 0.1
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// 3 93 mDNS Infrastructure Triangle 0.3 (Phase 10)
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// 4 105 SSDP Infrastructure Triangle -0.2 (Phase 10)
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// 5 118 SNMP Infrastructure Triangle 0.2 (Phase 10)
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// 6 133 DNS Infrastructure Triangle 0.0
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// 7 150 HTTPS Web Sawtooth -0.4
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// 8 169 HTTP Web Sawtooth -0.3
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// 9 190 HTTP3 Web Sawtooth -0.2 (Phase 10)
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// 10 214 SMTP Mail Triangle 0.2
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// 11 241 IMAP Mail Triangle 0.3 (Phase 10)
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// 12 271 POP3 Mail Triangle 0.4 (Phase 10)
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// 13 305 SMTP-sub Mail Triangle 0.5 (Phase 10)
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// 14 343 SSH Remote Access Square -0.7
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// 15 385 RDP Remote Access Square -0.6 (Phase 10)
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// 16 432 Telnet Remote Access Square -0.5 (Phase 10)
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// 17 485 VNC Remote Access Square -0.4 (Phase 10)
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// 18 545 FTP File Transfer Square 0.5 (Phase 10)
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// 19 612 SMB File Transfer Square 0.6 (Phase 10)
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// 20 687 TFTP File Transfer Square 0.7 (Phase 10)
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// 21 771 unknown-1 Unknown Custom -0.9
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// 22 866 unknown-2 Unknown Custom 0.9
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// 23 972 unknown-3 Unknown Custom -0.7
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// 24 1091 unknown-4 Unknown Custom 0.7
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// 25 1225 other-TCP Unknown Custom -0.5
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// 26 1375 other-UDP Unknown Custom 0.5
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// 27 1543 MySQL Database Sawtooth -0.4 (Phase 10)
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// 28 1732 PostgreSQL Database Sawtooth -0.2 (Phase 10)
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// 29 1944 Redis Database Sawtooth 0.2 (Phase 10)
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// 30 2182 MongoDB Database Sawtooth 0.4 (Phase 10)
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// 31 2449 SIP VoIP Sine 0.0 (Phase 10)
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//
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// Auto-assign range: [2500, 4000] Hz (see config/config.go)
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// ClassFreqConfigs maps each traffic class to its synthesis parameters.
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// Frequencies per Phase 9 major-second ladder design. Harmonics per D-05/D-06.
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// Pan positions per D-12. Group field drives family-aware config output (GRP-04).
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var ClassFreqConfigs = map[classify.TrafficClass]FreqConfig{
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// --- Infrastructure (Triangle, 65-133 Hz) ---
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classify.ClassICMP: {
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BaseHz: 65.0,
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WaveformType: WaveformTriangle,
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Harmonics: WaveformPresetHarmonics(WaveformTriangle, 65.0, SampleRate),
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Pan: -0.3,
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Group: "Infrastructure",
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},
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classify.ClassNTP: {
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BaseHz: 73.0,
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WaveformType: WaveformTriangle,
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Harmonics: WaveformPresetHarmonics(WaveformTriangle, 73.0, SampleRate),
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Pan: -0.1,
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Group: "Infrastructure",
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},
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classify.ClassDHCP: {
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BaseHz: 82.0,
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WaveformType: WaveformTriangle,
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Harmonics: WaveformPresetHarmonics(WaveformTriangle, 82.0, SampleRate),
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Pan: 0.1,
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Group: "Infrastructure",
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},
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classify.ClassDNS: {
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BaseHz: 133.0,
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WaveformType: WaveformTriangle,
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Harmonics: WaveformPresetHarmonics(WaveformTriangle, 133.0, SampleRate),
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Pan: 0.0,
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Group: "Infrastructure",
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},
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// --- Web (Sawtooth, 150-169 Hz) ---
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classify.ClassHTTPS: {
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BaseHz: 150.0,
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WaveformType: WaveformSawtooth,
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Harmonics: WaveformPresetHarmonics(WaveformSawtooth, 150.0, SampleRate),
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Pan: -0.4,
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Group: "Web",
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},
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classify.ClassHTTP: {
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BaseHz: 169.0,
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WaveformType: WaveformSawtooth,
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Harmonics: WaveformPresetHarmonics(WaveformSawtooth, 169.0, SampleRate),
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Pan: -0.3,
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Group: "Web",
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},
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// --- Mail (Triangle, 214 Hz) ---
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classify.ClassSMTP: {
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BaseHz: 214.0,
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WaveformType: WaveformTriangle,
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Harmonics: WaveformPresetHarmonics(WaveformTriangle, 214.0, SampleRate),
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Pan: 0.2,
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Group: "Mail",
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},
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// --- Remote Access (Square, 343 Hz) ---
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classify.ClassSSH: {
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BaseHz: 343.0,
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WaveformType: WaveformSquare,
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Harmonics: WaveformPresetHarmonics(WaveformSquare, 343.0, SampleRate),
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Pan: -0.7,
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Group: "Remote Access",
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},
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// --- Unknown (Custom harmonics, 771-1375 Hz) ---
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// D-05/D-06: dissonant harmonic character {1,1.0},{2,0.8},{3,0.4} retained for all Unknown entries.
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// WaveformType is zero value (WaveformCustom) so bank.go uses the stored Harmonics directly.
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classify.ClassUnknown1: {
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BaseHz: 771.0,
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Harmonics: []HarmonicDef{{1, 1.0}, {2, 0.8}, {3, 0.4}},
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Pan: -0.9,
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Group: "Unknown",
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},
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classify.ClassUnknown2: {
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BaseHz: 866.0,
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Harmonics: []HarmonicDef{{1, 1.0}, {2, 0.8}, {3, 0.4}},
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Pan: 0.9,
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Group: "Unknown",
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},
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classify.ClassUnknown3: {
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BaseHz: 972.0,
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Harmonics: []HarmonicDef{{1, 1.0}, {2, 0.8}, {3, 0.4}},
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Pan: -0.7,
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Group: "Unknown",
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},
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classify.ClassUnknown4: {
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BaseHz: 1091.0,
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Harmonics: []HarmonicDef{{1, 1.0}, {2, 0.8}, {3, 0.4}},
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Pan: 0.7,
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Group: "Unknown",
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},
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classify.ClassOtherTCP: {
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BaseHz: 1225.0,
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Harmonics: []HarmonicDef{{1, 1.0}, {2, 0.8}, {3, 0.4}},
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Pan: -0.5,
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Group: "Unknown",
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},
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classify.ClassOtherUDP: {
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BaseHz: 1375.0,
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Harmonics: []HarmonicDef{{1, 1.0}, {2, 0.8}, {3, 0.4}},
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Pan: 0.5,
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Group: "Unknown",
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},
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}
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