/**
 * Format constants.
 *
 * Layer 0. Imports nothing. Every magic number the parser relies on lives here with the
 * clause it comes from, so no other file needs a bare literal.
 */
/** The fixed header is one of these, and each signal adds exactly one more. */
export declare const EDF_HEADER_BLOCK_BYTES: 256;
/** Total header size is always `EDF_HEADER_BLOCK_BYTES * (signalCount + 1)`. */
export declare const EDF_SIGNAL_HEADER_BYTES: 256;
/** Trimmed, case-sensitive. On disk the field is `'EDF Annotations '` — 15 chars plus a pad. */
export declare const EDF_ANNOTATIONS_LABEL: "EDF Annotations";
export declare const BDF_ANNOTATIONS_LABEL: "BDF Annotations";
/** EDF spec recommendation, not a limit. Exceeding it is a warning, never an error. */
export declare const EDF_RECOMMENDED_MAX_RECORD_BYTES: 61440;
/**
 * Time is compared in exact 100 ns ticks, never in floats. Float equality on event times is
 * how ERP alignment silently breaks.
 */
export declare const TICKS_PER_SECOND = 10000000n;
/** 16-bit two's complement. */
export declare const EDF_DIGITAL_MIN: -32768;
export declare const EDF_DIGITAL_MAX: 32767;
/** 24-bit two's complement, sign-extended from bit 23. */
export declare const BDF_DIGITAL_MIN: -8388608;
export declare const BDF_DIGITAL_MAX: 8388607;
/** ns lives in a 4-byte field, so it cannot exceed four digits. */
export declare const EDF_MAX_SIGNAL_COUNT: 9999;
/** Default ceiling for any read that allocates. Refused before allocating, not during. */
export declare const DEFAULT_MAX_MATERIALIZE_BYTES: number;
/** TAL structural bytes. Every byte of a multi-byte UTF-8 sequence is >= 0x80, so these can
 *  never collide with text — which is why splitting on structure before decoding is safe. */
export declare const TAL_ONSET_DURATION_SEPARATOR: 21;
export declare const TAL_FIELD_TERMINATOR: 20;
export declare const TAL_TERMINATOR: 0;
/** Fixed-header field offsets and lengths, per the EDF specification. */
export declare const HEADER_FIELDS: {
    readonly version: {
        readonly offset: 0;
        readonly length: 8;
    };
    readonly patientId: {
        readonly offset: 8;
        readonly length: 80;
    };
    readonly recordingId: {
        readonly offset: 88;
        readonly length: 80;
    };
    readonly startDate: {
        readonly offset: 168;
        readonly length: 8;
    };
    readonly startTime: {
        readonly offset: 176;
        readonly length: 8;
    };
    readonly headerByteLength: {
        readonly offset: 184;
        readonly length: 8;
    };
    readonly reserved: {
        readonly offset: 192;
        readonly length: 44;
    };
    readonly recordCount: {
        readonly offset: 236;
        readonly length: 8;
    };
    readonly recordDuration: {
        readonly offset: 244;
        readonly length: 8;
    };
    readonly signalCount: {
        readonly offset: 252;
        readonly length: 4;
    };
};
/**
 * Per-signal header field widths, in the order they appear.
 *
 * The layout is FIELD-MAJOR, not one struct per signal: all `ns` labels, then all `ns`
 * transducers, and so on. For signal `i`, a field's address is
 * `256 + ns * (sum of widths before it) + i * (its own width)`.
 */
export declare const SIGNAL_FIELD_WIDTHS: {
    readonly label: 16;
    readonly transducerType: 80;
    readonly physicalDimension: 8;
    readonly physicalMinimum: 8;
    readonly physicalMaximum: 8;
    readonly digitalMinimum: 8;
    readonly digitalMaximum: 8;
    readonly prefiltering: 80;
    readonly samplesPerRecord: 8;
    readonly reserved: 32;
};
/** Cumulative width preceding each per-signal field. Multiply by ns to get its block start. */
export declare const SIGNAL_FIELD_BLOCK_OFFSETS: {
    readonly label: 0;
    readonly transducerType: 16;
    readonly physicalDimension: 96;
    readonly physicalMinimum: 104;
    readonly physicalMaximum: 112;
    readonly digitalMinimum: 120;
    readonly digitalMaximum: 128;
    readonly prefiltering: 136;
    readonly samplesPerRecord: 216;
    readonly reserved: 224;
};
/** Published package version. Kept in sync with package.json by a test. */
export declare const VERSION = "0.6.244";
//# sourceMappingURL=constants.d.ts.map