net.java.sip.communicator.impl.neomedia.codec.audio.silk
Class Silk_range_coder

java.lang.Object
  net.java.sip.communicator.impl.neomedia.codec.audio.silk.Silk_range_coder

public class Silk_range_coder
extends Object

Range coder

Author:

Jing Dai, Dingxin Xu

Constructor Summary

Silk_range_coder()

Method Summary

(package private) static void	SKP_Silk_range_coder_check_after_decoding(SKP_Silk_range_coder_state psRC) Check that any remaining bits in the last byte are set to 1.
(package private) static int	SKP_Silk_range_coder_get_length(SKP_Silk_range_coder_state psRC, int[] nBytes) Determine length of bitstream.
(package private) static void	SKP_Silk_range_dec_init(SKP_Silk_range_coder_state psRC, byte[] buffer, int buffer_offset, int bufferLength) Initialize range decoder.
(package private) static void	SKP_Silk_range_decoder_multi(int[] data, SKP_Silk_range_coder_state psRC, int[][] prob, int[] probStartIx, int nSymbols) Range decoder for multiple symbols.
(package private) static void	SKP_Silk_range_decoder(int[] data, int data_offset, SKP_Silk_range_coder_state psRC, int[] prob, int prob_offset, int probIx) Range decoder for one symbol.
(package private) static void	SKP_Silk_range_enc_init(SKP_Silk_range_coder_state psRC) Initialize range encoder.
(package private) static void	SKP_Silk_range_enc_wrap_up(SKP_Silk_range_coder_state psRC) Write shortest uniquely decodable stream to buffer, and determine its length.
(package private) static void	SKP_Silk_range_encoder_multi(SKP_Silk_range_coder_state psRC, int[] data, int[][] prob, int nSymbols) Range encoder for multiple symbols.
(package private) static void	SKP_Silk_range_encoder(SKP_Silk_range_coder_state psRC, int data, int[] prob, int prob_offset) Range encoder for one symbol.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Silk_range_coder

public Silk_range_coder()

Method Detail

SKP_Silk_range_encoder

static void SKP_Silk_range_encoder(SKP_Silk_range_coder_state psRC,
                                   int data,
                                   int[] prob,
                                   int prob_offset)

Range encoder for one symbol.

Parameters:

psRC - compressor data structure.

data - uncompressed data.

prob - cumulative density functions.

prob_offset - offset of valid data.

SKP_Silk_range_encoder_multi

static void SKP_Silk_range_encoder_multi(SKP_Silk_range_coder_state psRC,
                                         int[] data,
                                         int[][] prob,
                                         int nSymbols)

Range encoder for multiple symbols.

Parameters:

psRC - compressor data structure.

data - uncompressed data [nSymbols].

prob - cumulative density functions.

nSymbols - number of data symbols.

SKP_Silk_range_decoder

static void SKP_Silk_range_decoder(int[] data,
                                   int data_offset,
                                   SKP_Silk_range_coder_state psRC,
                                   int[] prob,
                                   int prob_offset,
                                   int probIx)

Range decoder for one symbol.

Parameters:

data - uncompressed data.

data_offset - offset of valid data.

psRC - compressor data structure.

prob - cumulative density function.

prob_offset - offset of valid data.

probIx - initial (middle) entry of cdf.

SKP_Silk_range_decoder_multi

static void SKP_Silk_range_decoder_multi(int[] data,
                                         SKP_Silk_range_coder_state psRC,
                                         int[][] prob,
                                         int[] probStartIx,
                                         int nSymbols)

Range decoder for multiple symbols.

Parameters:

data - uncompressed data [nSymbols].

psRC - compressor data structure.

prob - cumulative density functions.

probStartIx - initial (middle) entries of cdfs [nSymbols].

nSymbols - number of data symbols.

SKP_Silk_range_enc_init

static void SKP_Silk_range_enc_init(SKP_Silk_range_coder_state psRC)

Initialize range encoder.

Parameters:

psRC - compressor data structure.

SKP_Silk_range_dec_init

static void SKP_Silk_range_dec_init(SKP_Silk_range_coder_state psRC,
                                    byte[] buffer,
                                    int buffer_offset,
                                    int bufferLength)

Initialize range decoder.

Parameters:

psRC - compressor data structure.

buffer - buffer for compressed data [bufferLength].

buffer_offset - offset of valid data.

bufferLength - buffer length (in bytes).

SKP_Silk_range_coder_get_length

static int SKP_Silk_range_coder_get_length(SKP_Silk_range_coder_state psRC,
                                           int[] nBytes)

Determine length of bitstream.

Parameters:

psRC - compressed data structure.

nBytes - number of BYTES in stream.

Returns:

returns number of BITS in stream.

SKP_Silk_range_enc_wrap_up

static void SKP_Silk_range_enc_wrap_up(SKP_Silk_range_coder_state psRC)

Write shortest uniquely decodable stream to buffer, and determine its length.

Parameters:

psRC - ompressed data structure.

SKP_Silk_range_coder_check_after_decoding

static void SKP_Silk_range_coder_check_after_decoding(SKP_Silk_range_coder_state psRC)

Check that any remaining bits in the last byte are set to 1.

Parameters:

psRC - compressed data structure.