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https://github.com/ivabus/speakersafetyd
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docs: Add audump.py and speakers.txt
Signed-off-by: Hector Martin <marcan@marcan.st>
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Hector Martin
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297
docs/audump.py
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297
docs/audump.py
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import struct, sys, os.path, plistlib, pprint
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LABELS = {
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"spp3": {
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0: {
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0: "thermal protection enabled",
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1: "displacement protection enabled",
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2: "thermal/power control gain attack time (s)",
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3: "thermal/power control gain release time (s)",
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4: "ambient temperature",
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5: "SafeTlim",
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6: "SafeTlimTimeMin",
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7: "SafeTlimOffset",
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8: "LookaheadDelay_ms",
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9: "peak attack time (s)",
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10: "peak decay time (s)",
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11: "feedback integration time",
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12: "thermal gain (dB)",
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13: "displacement gain (dB)",
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14: "spk pwr averaging window time (s)",
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15: "modeled speaker power",
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16: "measured speaker power",
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17: "power control gain",
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18: "CPMS power control enabled",
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19: "CPMS power control closed loop",
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},
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4: {
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0: "temperature limit",
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1: "hard temp limit headroom",
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2: "T_sett_vc",
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3: "T_sett_mg",
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4: "tau_Tvc",
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5: "tau_Tmg",
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6: "ThermalFFSpeedupFactor",
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7: "temperature",
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8: "OL temperature",
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9: "Reb_ref",
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10: "Rshunt",
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11: "Rampout",
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12: "mt",
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13: "ct",
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14: "kt",
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15: "ag",
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16: "g_bw",
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17: "Q_d",
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18: "phi",
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19: "x_lim",
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20: "ThermalMeasurementMethod",
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21: "pilot tone enabled",
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22: "CL thermal feedback enabled",
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23: "TlimErrDecayTime",
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24: "TempSenseWindowTime",
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25: "TempSenseSmoothingTau",
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26: "a_t_inv",
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27: "PilotAmplHi_dB",
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28: "PilotAmplLo_dB",
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29: "PilotUpperThres",
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30: "PilotLowerThres",
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31: "PilotDecayTime",
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32: "PilotFreq",
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33: "LPMLSPreGain",
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34: "LPMLSPostGain",
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35: "LPMLSLowerCorner",
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36: "LPMLS pre clip level",
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37: "mu_Re",
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38: "mu_Le",
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39: "mu mechanical (PU)",
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40: "Max relative displacement",
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41: "abs(Min relative displacement)",
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42: "DisplacementProtectionType",
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64: "thermal gain",
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65: "displacement gain",
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66: "power control gain",
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67: "PilotDecayTimeStage2",
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68: "PilotEnableThres",
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},
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},
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"atsp": {
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0: {
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0: "Bypass",
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40: "Gain link all audio channels",
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1: "speakerType A: Amplifier sensitivity [V/Fs]",
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2: "speakerType A: VoiceCoil: DC resistance [Ohms]",
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3: "speakerType A: VoiceCoil: thermal resistance [C/Watt]",
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4: "speakerType A: Voice Coil: thermal time constant [s]",
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5: "speakerType A: Magnet: thermal resistance [C/Watt]",
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6: "speakerType A: Magnet: thermal time constant [s]",
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7: "speakerType A: Ambient temperature, [C]",
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# The target temperature of the speakers
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8: "speakerType A: Temperature limit [C]",
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9: "speakerType A: Attack time (ms)",
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10: "speakerType A: Release time (ms)",
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11: "speakerType A: Temperature hard limit headroom [C]",
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12: "speakerType A: Gain link",
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13: "speakerType A: Audio channel assignment",
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14: "speakerType B: Amplifier sensitivity [V/Fs",
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15: "speakerType B: VoiceCoil: DC resistance [Ohms]",
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16: "speakerType B: VoiceCoil: thermal resistance [C/Watt]",
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17: "speakerType B: Voice Coil: thermal time constant [s]",
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18: "speakerType B: Magnet: thermal resistance [C/Watt]",
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19: "speakerType B: Magnet: thermal time constant [s]",
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20: "speakerType B: Ambient temperature, [C]",
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21: "speakerType B: Temperature limit [C]",
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22: "speakerType B: Attack time (ms)",
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23: "speakerType B: Release time (ms)",
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24: "speakerType B: Temperature hard limit headroom [C]",
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25: "speakerType B: Gain link",
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26: "speakerType B: Audio channel assignment",
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27: "speakerType C: Amplifier sensitivity [V/Fs]",
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28: "speakerType C: VoiceCoil: DC resistance [Ohms]",
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29: "speakerType C: VoiceCoil: thermal resistance [C/Watt]",
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30: "speakerType C: Voice Coil: thermal time constant [s]",
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31: "speakerType C: Magnet: thermal resistance [C/Watt]",
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32: "speakerType C: Magnet: thermal time constant [s]",
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33: "speakerType C: Ambient temperature, [C]",
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34: "speakerType C: Temperature limit [C]",
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35: "speakerType C: Attack time (ms)",
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36: "speakerType C: Release time (ms)",
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37: "speakerType C: Temperature hard limit headroom [C]",
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38: "speakerType C: Gain link",
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39: "speakerType C: Audio channel assignment",
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}
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}
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}
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"""
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ATSP protection behavior:
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Max gain reduction is 20dB.
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"Temperature limit" is the target temperature
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If temperature exceeds limit + "Temperature hard limit headroom",
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protection goes into panic mode and triggers 20dB reduction.
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For settings:
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amp = 12 r = 4
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rVc = 50 aVc = 2 rMg = 1 aMg = 1
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Ta = 50 Tlim = 150 Theadroom = 5
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We see this limiter behavior:
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In Out
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0 -9.7
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-8 -9.7
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-9 -9.6
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-9.5 -9.7
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-9.8 -9.9
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-10 -10
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In other words, it behaves like a hard limit / compressor with infinite ratio.
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Theadroom has no influence on the gain reduction, it just affects stability
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(temperature does exceed Tlim transiently, if the transient is > Theadroom
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it panics). Too low a Theadroom leads to unstable behavior.
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"""
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def dump_audata(labels, data):
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top = {}
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while data:
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hdr = data[:0xc]
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data = data[0xc:]
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typ, grp, cnt = struct.unpack(">III", hdr)
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d = {}
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for i in range(cnt):
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blk = data[:0x8]
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data = data[0x8:]
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key, val = struct.unpack(">If", blk)
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if typ in labels:
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if key in labels[typ]:
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key = labels[typ][key]
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d[key] = val
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top[(typ, grp)] = d
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pprint.pprint(top, stream=sys.stderr)
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return top
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def process_spp3(e):
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# Grab the plist file, which is mostly redundant but contains
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# some details not in the au preset
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for i in prop["Boxes"]:
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if i["Name"] == e["displayname"]:
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for p in i["Properties"]:
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if p["Number"] == 64003:
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path = os.path.join(base, "DSP", p["Path"].split("/DSP/")[1])
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pl = plistlib.load(open(path, "rb"))
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d = dump_audata(LABELS["spp3"], e["aupreset"]["data"])
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spkrs = ""
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channels = 0
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gbl = d[(0, 0)]
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for (typ, ch), p in sorted(d.items()):
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if typ != 4:
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continue
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chp = pl["ChannelSpecificParams"][f"Channel{ch}"]
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channels += 2
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spkrs += f"""
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[Speaker/{chp["SpeakerName"]}]
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group = {chp["SpeakerGroup"]}
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tr_coil = {p["T_sett_vc"]:.2f}
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tr_magnet = {p["T_sett_mg"]:.2f}
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tau_coil = {p["tau_Tvc"]:.2f}
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tau_magnet = {p["tau_Tmg"]:.2f}
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t_limit = {p["temperature limit"]:.1f}
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t_headroom = {p["hard temp limit headroom"]:.1f}
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z_nominal = {p["Reb_ref"]:.2f}
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z_shunt = {p["Rshunt"]:.2f}
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is_scale = 3.75
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vs_scale = 14
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is_chan = {2 * ch}
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vs_chan = {2 * ch + 1}"""
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print(f"""\
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[Globals]
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visense_pcm = 2
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t_ambient = {gbl["ambient temperature"]}
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t_hysteresis = 5.0
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t_window = 20.0
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channels = {channels}
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period = 4096
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link_gains = True
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[Controls]
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vsense = VSENSE Switch
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isense = ISENSE Switch
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amp_gain = Amp Gain Volume
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volume = Speaker Volume{spkrs}""")
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def process_atsp(e):
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# print(e)
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d = dump_audata(LABELS["atsp"], e["aupreset"]["data"])[(0,0)]
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t_ambient = None
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spkrs = ""
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channels = 0
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for gid, gn in enumerate("ABC"):
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p = f"speakerType {gn}: "
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ch = int(d[p + "Audio channel assignment"])
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if not ch:
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continue
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if ch == 0xffff:
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ch = 1
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ambient = d[p + "Ambient temperature, [C]"]
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assert t_ambient is None or t_ambient == ambient
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t_ambient = ambient
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for i in range(16):
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if ch & (1 << i):
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channels += 2
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spkrs += f"""
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[Speaker/{gn}_ch{i}]
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group = {gid}
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tr_coil = {d[p + "VoiceCoil: thermal resistance [C/Watt]"]:.2f}
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tr_magnet = {d[p + "Magnet: thermal resistance [C/Watt]"]:.2f}
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tau_coil = {d[p + "Voice Coil: thermal time constant [s]"]:.2f}
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tau_magnet = {d[p + "Magnet: thermal time constant [s]"]:.2f}
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t_limit = {d[p + "Temperature limit [C]"]:.1f}
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t_headroom = {d[p + "Temperature hard limit headroom [C]"]:.1f}
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z_nominal = {d[p + "VoiceCoil: DC resistance [Ohms]"]:.2f}
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is_scale = 3.75
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vs_scale = 14
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is_chan = {2 * i}
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vs_chan = {2 * i + 1}"""
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print(f"""\
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[Globals]
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visense_pcm = 2
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t_ambient = {t_ambient}
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t_hysteresis = 5.0
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t_window = 20.0
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channels = {channels}
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period = 4096
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link_gains = {bool(d["Gain link all audio channels"])}
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[Controls]
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vsense = VSENSE Switch
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isense = ISENSE Switch
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amp_gain = Amp Gain Volume
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volume = Speaker Volume{spkrs}""")
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if __name__ == "__main__":
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base = sys.argv[1]
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au = plistlib.load(open(os.path.join(base, "DSP/Strips/builtin_speaker_out_general.austrip"), "rb"))
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try:
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prop = plistlib.load(open(os.path.join(base, "DSP/Strips/builtin_speaker_out_general.propstrip"), "rb"))
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except:
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prop = None
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for s in au["strips"]:
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for e in s["effects"]:
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if e["unit"]["subtype"].to_bytes(4) == b"spp3":
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process_spp3(e)
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if e["unit"]["subtype"].to_bytes(4) == b"atsp":
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process_atsp(e)
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20
docs/speakers.txt
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20
docs/speakers.txt
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@ -0,0 +1,20 @@
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Speaker configs
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Model ID Amp Gain Speakers Sense Prot
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j180 AID19 sn012776 10 1× 1W+1T no atsp
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j274 AID6 tas5770 20 1× 1W no atsp
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j293 AID3 tas5770 15 2× 2W no atsp
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j313 AID4 tas5770 10 2× 1W no atsp
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j314 AID8 sn012776 15 2× 2W+1T yes spp3
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j316 AID9 sn012776 15 2× 2W+1T yes spp3
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j375 AID10 sn012776 15 1× 1W no atsp
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j413 AID13 sn012776 15 2× 1W+1T yes spp3
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j414 AID14 sn012776 15 2× 2W+1T yes spp3
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j415 AID27 sn012776 15 2× 2W+1T yes spp3
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j416 AID15 sn012776 15 2× 2W+1T yes spp3
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j456 AID5 ssm3515 15 2× 1W+1T no atsp
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j457 AID7 ssm3515 15 2× 1W+1T no atsp
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j473 AID12 sn012776 20 1× 1W no atsp
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j474 AID26 sn012776 20 1× 1W no atsp
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j475 AID25 sn012776 20 1× 1W no atsp
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j493 AID18 sn012776 15 2× 2W unused? atsp
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