import { ByteVector } from "../byteVector";
import { ILosslessAudioCodec, MediaTypes } from "../properties";
/**
 * Defines the format of waveform-audio data. Only format information common to all waveform-audio
 * data formats is included in this structure.
 * https://docs.microsoft.com/en-us/previous-versions/dd757713(v=vs.85)
 */
export default class RiffWaveFormatEx implements ILosslessAudioCodec {
    /**
     * FOURCC code that indicates the chunk is a RiffWaveFormatEx object.
     */
    static readonly CHUNK_FOURCC = "fmt ";
    /**
     * List of well-known wave format tags. This is similar to FOURCC codes but for audio codecs.
     * @remarks
     *     This list was put together from the Windows 10 SDK mmreg.h header file
     *     If any of these descriptions are wrong or out of date, please open a PR.
     */
    static readonly WAVE_FORMAT_TAGS: Map<number, string>;
    private readonly _averageBytesPerSecond;
    private readonly _bitsPerSample;
    private readonly _blockAlign;
    private readonly _channels;
    private readonly _formatTag;
    private readonly _samplesPerSecond;
    /**
     * Constructs and initializes a new instance of a RIFF wave format header from the provided
     * data.
     * @param data Byte vector that contains the raw header
     */
    constructor(data: ByteVector);
    /** @inheritDoc */
    get audioBitrate(): number;
    /** @inheritDoc */
    get audioChannels(): number;
    /** @inheritDoc */
    get audioSampleRate(): number;
    /**
     * Gets the average data-transfer rate, in bytes per second, of audio described by the current
     * instance.
     */
    get averageBytesPerSecond(): number;
    /**
     * @inheritDoc
     * @remarks
     *     Some compression schemes cannot define a value for this field, so it may be `0`.
     *     This is especially common for MP3 audio embedded in an AVI.
     */
    get bitsPerSample(): number;
    /**
     * Gets the block alignment, in bytes. Block alignment is the minimum atomic unit of data for
     * {@link formatTag} format type.
     */
    get blockAlign(): number;
    /** @inheritDoc */
    get description(): string;
    /**
     * @inheritDoc
     * @remarks Duration cannot be found from this object
     */
    get durationMilliseconds(): number;
    /**
     * Gets the format tag of the audio described by the current instance.
     * @remarks
     *     Format tags indicate the codec of the audio contained in the file and are
     *     contained in a Microsoft registry. For a description of the format, use
     *     {@link description}. The complete list can be found in the Win32 mmreg.h SDK header file
     */
    get formatTag(): number;
    /**
     * @inheritDoc
     * @remarks
     *     Technically any audio format can be encapsulated with a RIFF header since RIFF is
     *     simply a "Resource Interchange File Format". It is entirely possible to encapsulate a
     *     lossy format (and indeed, lossy WMA must be encapsulated) with a RIFF header. Therefore,
     *     this designation as lossless is somewhat misleading and checking {@link description} is
     *     necessary to verify the codec being used is lossless or not.
     */
    get mediaTypes(): MediaTypes;
}