Package javazoom.jl.decoder

Class Header

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

  • Field Details

    • frequencies

      public static final int[][] frequencies

    • MPEG2_LSF

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

    • MPEG25_LSF

      public static final int MPEG25_LSF
      See Also:

    • MPEG1

      public static final int MPEG1
      Constant for MPEG-1 version
      See Also:

    • STEREO

      public static final int STEREO
      See Also:

    • JOINT_STEREO

      public static final int JOINT_STEREO
      See Also:

    • DUAL_CHANNEL

      public static final int DUAL_CHANNEL
      See Also:

    • SINGLE_CHANNEL

      public static final int SINGLE_CHANNEL
      See Also:

    • FOURTYFOUR_POINT_ONE

      public static final int FOURTYFOUR_POINT_ONE
      See Also:

    • FOURTYEIGHT

      public static final int FOURTYEIGHT
      See Also:

    • THIRTYTWO

      public static final int THIRTYTWO
      See Also:

    • checksum

      public short checksum

    • framesize

      public int framesize

    • nSlots

      public int nSlots

    • bitrates

      public static final int[][][] bitrates

    • bitrate_str

      public static final String[][][] bitrate_str

  • Method Details

    • toString

      public String toString()
      Overrides:
      toString in class 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 String layer_string()
      Return Layer version.

    • bitrate_string

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

    • mode_string

      public String mode_string()
      Returns Mode.

    • version_string

      public 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