Package javazoom.jl.decoder

Class Bitstream

  • All Implemented Interfaces:
    BitstreamErrors, JavaLayerErrors
    public final class Bitstream
extends java.lang.Object
implements BitstreamErrors
    The Bistream class is responsible for parsing an MPEG audio bitstream. REVIEW: much of the parsing currently occurs in the various decoders. This should be moved into this class and associated inner classes.

    • Constructor Detail

      • Bitstream

        public Bitstream​(java.io.InputStream in)
        Construct a IBitstream that reads data from a given InputStream.
        Parameters:
        in - The InputStream to read from.

    • Method Detail

      • header_pos

        public int header_pos()
        Return position of the first audio header.
        Returns:
        size of ID3v2 tag frames.

      • getRawID3v2

        public java.io.InputStream getRawID3v2()
        Return raw ID3v2 frames + header.
        Returns:
        ID3v2 InputStream or null if ID3v2 frames are not available.

      • readFrame

        public Header readFrame()
                 throws BitstreamException
        Reads and parses the next frame from the input source.
        Returns:
        the Header describing details of the frame read, or null if the end of the stream has been reached.
        Throws:
        BitstreamException

      • closeFrame

        public void closeFrame()
        Close MP3 frame.

      • isSyncCurrentPosition

        public boolean isSyncCurrentPosition​(int syncmode)
                              throws BitstreamException
        Determines if the next 4 bytes of the stream represent a frame header.
        Throws:
        BitstreamException

      • readBits

        public int readBits​(int n)

      • readCheckedBits

        public int readCheckedBits​(int n)

      • newBitstreamException

        protected BitstreamException newBitstreamException​(int errorcode)

      • newBitstreamException

        protected BitstreamException newBitstreamException​(int errorcode,
                                                   java.lang.Throwable throwable)

      • isSyncMark

        public boolean isSyncMark​(int headerstring,
                          int syncmode,
                          int word)

      • get_bits

        public int get_bits​(int number_of_bits)
        Read bits from buffer into the lower bits of an unsigned int. The LSB contains the latest read bit of the stream. (1 <= number_of_bits <= 16)