Package javazoom.jl.decoder

Class Header

  • public final class Header
extends java.lang.Object
    Class for extracting information from a frame header.

    • Field Detail

      • frequencies

        public static final int[][] frequencies

      • MPEG2_LSF

        public static final int MPEG2_LSF
        Constant for MPEG-2 LSF version
        See Also:
        Constant Field Values

      • checksum

        public short checksum

      • framesize

        public int framesize

      • nSlots

        public int nSlots

      • bitrates

        public static final int[][][] bitrates

      • bitrate_str

        public static final java.lang.String[][][] bitrate_str

    • Method Detail

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • version

        public int version()
        Returns version.

      • layer

        public int layer()
        Returns Layer ID.

      • bitrate_index

        public int bitrate_index()
        Returns bitrate index.

      • sample_frequency

        public int sample_frequency()
        Returns Sample Frequency.

      • frequency

        public int frequency()
        Returns Frequency.

      • mode

        public int mode()
        Returns Mode.

      • checksums

        public boolean checksums()
        Returns Protection bit.

      • copyright

        public boolean copyright()
        Returns Copyright.

      • original

        public boolean original()
        Returns Original.

      • vbr

        public boolean vbr()
        Return VBR.
        Returns:
        true if VBR header is found

      • vbr_scale

        public int vbr_scale()
        Return VBR scale.
        Returns:
        scale of -1 if not available

      • vbr_toc

        public byte[] vbr_toc()
        Return VBR TOC.
        Returns:
        vbr toc ot null if not available

      • checksum_ok

        public boolean checksum_ok()
        Returns Checksum flag. Compares computed checksum with stream checksum.

      • padding

        public boolean padding()
        Returns Layer III Padding bit.

      • slots

        public int slots()
        Returns Slots.

      • mode_extension

        public int mode_extension()
        Returns Mode Extension.

      • calculate_framesize

        public int calculate_framesize()
        Calculate Frame size. Calculates framesize in bytes excluding header size.

      • max_number_of_frames

        public int max_number_of_frames​(int streamsize)
        Returns the maximum number of frames in the stream.
        Parameters:
        streamsize -
        Returns:
        number of frames

      • min_number_of_frames

        public int min_number_of_frames​(int streamsize)
        Returns the maximum number of frames in the stream.
        Parameters:
        streamsize -
        Returns:
        number of frames

      • ms_per_frame

        public float ms_per_frame()
        Returns ms/frame.
        Returns:
        milliseconds per frame

      • total_ms

        public float total_ms​(int streamsize)
        Returns total ms.
        Parameters:
        streamsize -
        Returns:
        total milliseconds

      • getSyncHeader

        public int getSyncHeader()
        Returns synchronized header.

      • layer_string

        public java.lang.String layer_string()
        Return Layer version.

      • bitrate_string

        public java.lang.String bitrate_string()
        Return Bitrate.
        Returns:
        bitrate in bps

      • bitrate

        public int bitrate()
        Return Bitrate.
        Returns:
        bitrate in bps and average bitrate for VBR header

      • bitrate_instant

        public int bitrate_instant()
        Return Instant Bitrate. Bitrate for VBR is not constant.
        Returns:
        bitrate in bps

      • sample_frequency_string

        public java.lang.String sample_frequency_string()
        Returns Frequency
        Returns:
        frequency string in kHz

      • mode_string

        public java.lang.String mode_string()
        Returns Mode.

      • version_string

        public java.lang.String version_string()
        Returns Version.
        Returns:
        MPEG-1 or MPEG-2 LSF or MPEG-2.5 LSF

      • number_of_subbands

        public int number_of_subbands()
        Returns the number of subbands in the current frame.
        Returns:
        number of subbands

      • intensity_stereo_bound

        public int intensity_stereo_bound()
        Returns Intensity Stereo. (Layer II joint stereo only). Returns the number of subbands which are in stereo mode, subbands above that limit are in intensity stereo mode.
        Returns:
        intensity