Add Hi-Res authenticity check

Introduce a per-file Hi-Res authenticity checker and optional auto re-download for flagged fake Hi-Res downloads. Adds Rust checker modules (fft, evidence, FLAC/WAV decoding, tests) and a mobile API (check_hires_authenticity). Wire platform bindings for Android/iOS and PlatformBridge. Add Dart HiResCheckService, UI HiResCheckCard, settings toggle (redownloadFakeHiRes) and integration in the download pipeline to quarantine and replace suspicious files with LOSSLESS when safe. Adds claxon FLAC dependency.
2026-09-30 13:19:44 +02:00 · 2026-09-23 22:29:15 +02:00
1 parent 83bd55bb64
commit 14ce4bc868
@@ -4856,6 +4856,131 @@
  "@audioAnalysisRescan": {
    "description": "Tooltip/label for the button that re-runs the audio analysis, discarding cached results"
  },
+  "downloadRedownloadFakeHiRes": "Re-download fake Hi-Res",
+  "@downloadRedownloadFakeHiRes": {
+    "description": "Setting title: automatically replace downloads that measure as fake Hi-Res"
+  },
+  "downloadRedownloadFakeHiResSubtitle": "Check each Hi-Res FLAC after download and download it again as Lossless when it is certainly or very likely fake. Possible filtered masters are kept",
+  "@downloadRedownloadFakeHiResSubtitle": {
+    "description": "Setting subtitle for the fake Hi-Res re-download toggle"
+  },
+  "hiResCheckVerdictFakeCertain": "Fake Hi-Res",
+  "@hiResCheckVerdictFakeCertain": {
+    "description": "Verdict: an exact fingerprint (padded bits or upsampling pattern) proves the file is not real Hi-Res"
+  },
+  "hiResCheckVerdictFakeSuspect": "Possibly a filtered master",
+  "@hiResCheckVerdictFakeSuspect": {
+    "description": "Verdict: fails the cutoff test but may be a genuine master low-pass filtered in mastering"
+  },
+  "hiResCheckReasonSampleHold": "Every sample is repeated: upsampled by duplication",
+  "@hiResCheckReasonSampleHold": {
+    "description": "Reason: sample-and-hold upsampling detected"
+  },
+  "hiResCheckReasonInterpolation": "In-between samples are linearly interpolated",
+  "@hiResCheckReasonInterpolation": {
+    "description": "Reason: linear-interpolation upsampling detected"
+  },
+  "hiResCheckReasonImaging": "Content above 22 kHz mirrors the audible band",
+  "@hiResCheckReasonImaging": {
+    "description": "Reason: spectral imaging from upsampling detected"
+  },
+  "hiResCheckMusicContent": "Musical content",
+  "@hiResCheckMusicContent": {
+    "description": "Label for the highest frequency that still moves with the music"
+  },
+  "hiResCheckUltrasonicNoise": "Above {cutoff} only steady noise (typical of DSD or analog tape transfers): a {rate} file would hold all the music",
+  "@hiResCheckUltrasonicNoise": {
+    "description": "Shown when the ultrasonic content of a Hi-Res file is noise rather than music",
+    "placeholders": {
+      "cutoff": {
+        "type": "String"
+      },
+      "rate": {
+        "type": "String"
+      }
+    }
+  },
+  "hiResCheckTitle": "Hi-Res Authenticity",
+  "@hiResCheckTitle": {
+    "description": "Title of the fake Hi-Res check card"
+  },
+  "hiResCheckDescription": "Detect upsampled or bit-padded fake Hi-Res files",
+  "@hiResCheckDescription": {
+    "description": "Explains what the Hi-Res authenticity check does"
+  },
+  "hiResCheckRun": "Check",
+  "@hiResCheckRun": {
+    "description": "Button that starts the Hi-Res authenticity check"
+  },
+  "hiResCheckChecking": "Checking Hi-Res authenticity...",
+  "@hiResCheckChecking": {
+    "description": "Loading text while the Hi-Res check runs"
+  },
+  "hiResCheckVerdictFake": "Likely fake Hi-Res",
+  "@hiResCheckVerdictFake": {
+    "description": "Verdict: the file claims Hi-Res but does not measure as it"
+  },
+  "hiResCheckVerdictGenuine": "Measures as genuine Hi-Res",
+  "@hiResCheckVerdictGenuine": {
+    "description": "Verdict: no upsampling or padded bit depth found"
+  },
+  "hiResCheckVerdictStandard": "Standard definition, nothing to flag",
+  "@hiResCheckVerdictStandard": {
+    "description": "Verdict: neither sample rate nor bit depth claims Hi-Res"
+  },
+  "hiResCheckVerdictInconclusive": "Inconclusive: the analyzed segment is too quiet or short",
+  "@hiResCheckVerdictInconclusive": {
+    "description": "Verdict: analysis could not reach a reliable conclusion"
+  },
+  "hiResCheckUnsupported": "Only FLAC and WAV files can be checked",
+  "@hiResCheckUnsupported": {
+    "description": "Shown when the file format cannot be decoded by the Hi-Res check"
+  },
+  "hiResCheckCutoff": "Content cutoff",
+  "@hiResCheckCutoff": {
+    "description": "Label for the highest frequency with real content"
+  },
+  "hiResCheckBitsInUse": "Bits in use",
+  "@hiResCheckBitsInUse": {
+    "description": "Label for effective vs declared bit depth"
+  },
+  "hiResCheckDisclaimer": "The spectrum stops early, but nothing proves it was upsampled: it may be a genuine master low-pass filtered in mastering. It is not replaced automatically.",
+  "@hiResCheckDisclaimer": {
+    "description": "Caveat shown under a fake Hi-Res verdict"
+  },
+  "hiResCheckFailed": "Hi-Res check failed: {error}",
+  "@hiResCheckFailed": {
+    "description": "Error shown when the Hi-Res check fails",
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "hiResCheckReasonRate": "Declares {sampleRate} but content stops at ~{cutoff}",
+  "@hiResCheckReasonRate": {
+    "description": "Reason for a fake verdict caused by upsampling",
+    "placeholders": {
+      "sampleRate": {
+        "type": "String"
+      },
+      "cutoff": {
+        "type": "String"
+      }
+    }
+  },
+  "hiResCheckReasonDepth": "Declares {declared}-bit but only {effective} bits carry data",
+  "@hiResCheckReasonDepth": {
+    "description": "Reason for a fake verdict caused by padded bit depth",
+    "placeholders": {
+      "declared": {
+        "type": "int"
+      },
+      "effective": {
+        "type": "int"
+      }
+    }
+  },
  "audioAnalysisRescanning": "Re-analyzing audio...",
  "@audioAnalysisRescanning": {
    "description": "Loading text while audio is being re-analyzed after an explicit refresh"
@@ -4732,6 +4732,131 @@
  "@audioAnalysisRescan": {
    "description": "Tooltip/label for the button that re-runs the audio analysis, discarding cached results"
  },
+  "downloadRedownloadFakeHiRes": "Riscarica i falsi Hi-Res",
+  "@downloadRedownloadFakeHiRes": {
+    "description": "Setting title: automatically replace downloads that measure as fake Hi-Res"
+  },
+  "downloadRedownloadFakeHiResSubtitle": "Verifica ogni FLAC Hi-Res dopo il download e lo riscarica in Lossless quando è falso con certezza o quasi. I possibili master filtrati vengono tenuti",
+  "@downloadRedownloadFakeHiResSubtitle": {
+    "description": "Setting subtitle for the fake Hi-Res re-download toggle"
+  },
+  "hiResCheckVerdictFakeCertain": "Falso Hi-Res",
+  "@hiResCheckVerdictFakeCertain": {
+    "description": "Verdict: an exact fingerprint (padded bits or upsampling pattern) proves the file is not real Hi-Res"
+  },
+  "hiResCheckVerdictFakeSuspect": "Forse un master filtrato",
+  "@hiResCheckVerdictFakeSuspect": {
+    "description": "Verdict: fails the cutoff test but may be a genuine master low-pass filtered in mastering"
+  },
+  "hiResCheckReasonSampleHold": "Ogni campione è ripetuto: ricampionato per duplicazione",
+  "@hiResCheckReasonSampleHold": {
+    "description": "Reason: sample-and-hold upsampling detected"
+  },
+  "hiResCheckReasonInterpolation": "I campioni intermedi sono interpolati linearmente",
+  "@hiResCheckReasonInterpolation": {
+    "description": "Reason: linear-interpolation upsampling detected"
+  },
+  "hiResCheckReasonImaging": "Il contenuto sopra i 22 kHz è lo specchio della banda udibile",
+  "@hiResCheckReasonImaging": {
+    "description": "Reason: spectral imaging from upsampling detected"
+  },
+  "hiResCheckMusicContent": "Contenuto musicale",
+  "@hiResCheckMusicContent": {
+    "description": "Label for the highest frequency that still moves with the music"
+  },
+  "hiResCheckUltrasonicNoise": "Sopra {cutoff} solo rumore costante (tipico dei trasferimenti da DSD o nastro analogico): un file a {rate} conterrebbe tutta la musica",
+  "@hiResCheckUltrasonicNoise": {
+    "description": "Shown when the ultrasonic content of a Hi-Res file is noise rather than music",
+    "placeholders": {
+      "cutoff": {
+        "type": "String"
+      },
+      "rate": {
+        "type": "String"
+      }
+    }
+  },
+  "hiResCheckTitle": "Autenticità Hi-Res",
+  "@hiResCheckTitle": {
+    "description": "Title of the fake Hi-Res check card"
+  },
+  "hiResCheckDescription": "Rileva file Hi-Res falsi, ricampionati o con bit riempiti",
+  "@hiResCheckDescription": {
+    "description": "Explains what the Hi-Res authenticity check does"
+  },
+  "hiResCheckRun": "Verifica",
+  "@hiResCheckRun": {
+    "description": "Button that starts the Hi-Res authenticity check"
+  },
+  "hiResCheckChecking": "Verifica dell'autenticità Hi-Res...",
+  "@hiResCheckChecking": {
+    "description": "Loading text while the Hi-Res check runs"
+  },
+  "hiResCheckVerdictFake": "Probabile falso Hi-Res",
+  "@hiResCheckVerdictFake": {
+    "description": "Verdict: the file claims Hi-Res but does not measure as it"
+  },
+  "hiResCheckVerdictGenuine": "Risulta Hi-Res autentico",
+  "@hiResCheckVerdictGenuine": {
+    "description": "Verdict: no upsampling or padded bit depth found"
+  },
+  "hiResCheckVerdictStandard": "Definizione standard, niente da segnalare",
+  "@hiResCheckVerdictStandard": {
+    "description": "Verdict: neither sample rate nor bit depth claims Hi-Res"
+  },
+  "hiResCheckVerdictInconclusive": "Inconcludente: il segmento analizzato è troppo silenzioso o breve",
+  "@hiResCheckVerdictInconclusive": {
+    "description": "Verdict: analysis could not reach a reliable conclusion"
+  },
+  "hiResCheckUnsupported": "Si possono verificare solo file FLAC e WAV",
+  "@hiResCheckUnsupported": {
+    "description": "Shown when the file format cannot be decoded by the Hi-Res check"
+  },
+  "hiResCheckCutoff": "Taglio del contenuto",
+  "@hiResCheckCutoff": {
+    "description": "Label for the highest frequency with real content"
+  },
+  "hiResCheckBitsInUse": "Bit usati",
+  "@hiResCheckBitsInUse": {
+    "description": "Label for effective vs declared bit depth"
+  },
+  "hiResCheckDisclaimer": "Lo spettro si ferma presto, ma nulla prova che sia ricampionato: potrebbe essere un master autentico filtrato in mastering. Non viene sostituito automaticamente.",
+  "@hiResCheckDisclaimer": {
+    "description": "Caveat shown under a fake Hi-Res verdict"
+  },
+  "hiResCheckFailed": "Verifica Hi-Res non riuscita: {error}",
+  "@hiResCheckFailed": {
+    "description": "Error shown when the Hi-Res check fails",
+    "placeholders": {
+      "error": {
+        "type": "String"
+      }
+    }
+  },
+  "hiResCheckReasonRate": "Dichiara {sampleRate} ma il contenuto si ferma a ~{cutoff}",
+  "@hiResCheckReasonRate": {
+    "description": "Reason for a fake verdict caused by upsampling",
+    "placeholders": {
+      "sampleRate": {
+        "type": "String"
+      },
+      "cutoff": {
+        "type": "String"
+      }
+    }
+  },
+  "hiResCheckReasonDepth": "Dichiara {declared} bit ma solo {effective} contengono dati",
+  "@hiResCheckReasonDepth": {
+    "description": "Reason for a fake verdict caused by padded bit depth",
+    "placeholders": {
+      "declared": {
+        "type": "int"
+      },
+      "effective": {
+        "type": "int"
+      }
+    }
+  },
  "audioAnalysisRescanning": "Re-analyzing audio...",
  "@audioAnalysisRescanning": {
    "description": "Loading text while audio is being re-analyzed after an explicit refresh"