/** @packageDocumentation Audio properties for AIFF/AIFC files. Parses the COMM chunk including optional AIFC compression info. */
import { ByteVector } from "../../byteVector.js";
import { AudioProperties } from "../../audioProperties.js";
import { ReadStyle } from "../../toolkit/types.js";
/**
 * Audio properties parsed from an AIFF/AIFC `COMM` chunk.
 *
 * `COMM` chunk layout (big-endian):
 * `channels(2)` + `sampleFrames(4)` + `bitsPerSample(2)`
 * + `sampleRate(10 bytes, IEEE 754 80-bit extended float)`
 *
 * For AIFC, additionally:
 * + `compressionType(4)` + `compressionName(Pascal string)`
 */
export declare class AiffProperties extends AudioProperties {
    /** Number of audio channels. */
    private _channels;
    /** Total number of PCM sample frames in the stream. */
    private _sampleFrames;
    /** Bits per sample (bit depth). */
    private _bitsPerSample;
    /** Sample rate in Hz (decoded from the 80-bit IEEE 754 extended float). */
    private _sampleRate;
    /** Byte length of the `"SSND"` sound-data chunk. */
    private _streamLength;
    /** Whether this is an AIFC file (contains a compression type field). */
    private _isAifc;
    /** Four-character compression type identifier (AIFC only, e.g. `"NONE"`, `"sowt"`). */
    private _compressionType;
    /** Human-readable compression name Pascal string (AIFC only). */
    private _compressionName;
    /**
     * Constructs an {@link AiffProperties} instance by parsing a `COMM` chunk.
     * @param commData - Raw bytes of the `COMM` chunk (must be at least 18 bytes).
     * @param streamLength - Byte length of the `"SSND"` chunk.
     * @param readStyle - Level of detail for property parsing. Defaults to `ReadStyle.Average`.
     */
    constructor(commData: ByteVector, streamLength: number, readStyle?: ReadStyle);
    /**
     * Playback duration in milliseconds, derived from `sampleFrames` and `sampleRate`.
     * @returns Duration in milliseconds, or `0` if `sampleRate` is zero.
     */
    get lengthInMilliseconds(): number;
    /**
     * Average bitrate of the stream in kilobits per second.
     * Matches the C++ calculation: `trunc(streamLength * 8 / preciseLength + 0.5)`.
     * @returns Bitrate in kbps, or `0` if duration is zero.
     */
    get bitrate(): number;
    /**
     * Sample rate of the audio stream in Hz (rounded to the nearest integer).
     * @returns Sample rate in Hz, or `0` if unknown.
     */
    get sampleRate(): number;
    /**
     * Number of audio channels.
     * @returns Channel count (e.g. `2` for stereo).
     */
    get channels(): number;
    /**
     * Bits per sample (bit depth) of the audio stream.
     * @returns Bit depth (e.g. `16`, `24`).
     */
    get bitsPerSample(): number;
    /**
     * Total number of PCM sample frames in the `"SSND"` chunk.
     * @returns Sample frame count.
     */
    get sampleFrames(): number;
    /**
     * Whether this is an AIFC file (the `COMM` chunk contains a compression type field).
     * @returns `true` for AIFC, `false` for plain AIFF.
     */
    get isAifc(): boolean;
    /**
     * Four-character compression type identifier (AIFC only).
     * Common values: `"NONE"` (uncompressed), `"sowt"` (little-endian PCM), `"fl32"`.
     * @returns The compression type string, or `""` for plain AIFF.
     */
    get compressionType(): string;
    /**
     * Human-readable compression name from the Pascal string in the `COMM` chunk (AIFC only).
     * @returns The compression name string, or `""` for plain AIFF.
     */
    get compressionName(): string;
}
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