mrleo1nidandClaude Opus 5.5
9b50038bb4
A background Fingerprinter runs after every scan and at startup, one file at a time, filling media_files.sha256 and track_fingerprints (fpcalc raw, first 120 s). Without fpcalc only SHA-256 is computed and files stay queued for Chromaprint. Changing a file's content resets its prints. Similarity() compares raw prints with a ±80-point alignment search; it is the basis for duplicate detection in the upload queue. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
20 lines
1.1 KiB
SQL
20 lines
1.1 KiB
SQL
-- +goose Up
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-- Отпечатки файлов библиотеки для проверки дублей при загрузке (docs/uploads.md#4-проверка-на-дубли):
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-- полный SHA-256 — в media_files.sha256, акустический Chromaprint — здесь.
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ALTER TABLE media_files ADD COLUMN fingerprinted_at timestamptz;
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CREATE INDEX media_files_fingerprint_todo_idx ON media_files (id) WHERE fingerprinted_at IS NULL;
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CREATE TABLE track_fingerprints (
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file_id uuid PRIMARY KEY REFERENCES media_files(id) ON DELETE CASCADE,
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duration_ms int NOT NULL,
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fingerprint int[] NOT NULL, -- raw-отпечаток fpcalc (uint32 как int4)
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fp_prefix bigint NOT NULL -- первые 64 бита — грубый индекс для отбора кандидатов
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);
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CREATE INDEX track_fingerprints_prefix_idx ON track_fingerprints (fp_prefix);
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CREATE INDEX track_fingerprints_duration_idx ON track_fingerprints (duration_ms);
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-- +goose Down
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DROP TABLE track_fingerprints;
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DROP INDEX media_files_fingerprint_todo_idx;
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ALTER TABLE media_files DROP COLUMN fingerprinted_at;
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