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

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

public class Silk_shell_coder
extends Object

shell coder; pulse-subframe length is hardcoded.

Author:

Jing Dai, Dingxin Xu

Constructor Summary

Silk_shell_coder()

Method Summary

(package private) static void	combine_pulses(int[] out, int out_offset, int[] in, int in_offset, int len)
(package private) static void	decode_split(int[] p_child1, int p_child1_offset, int[] p_child2, int p_child2_offset, SKP_Silk_range_coder_state sRC, int p, int[] shell_table)
(package private) static void	encode_split(SKP_Silk_range_coder_state sRC, int p_child1, int p, int[] shell_table)
(package private) static void	SKP_Silk_shell_decoder(int[] pulses0, int pulses0_offset, SKP_Silk_range_coder_state sRC, int pulses4) Shell decoder, operates on one shell code frame of 16 pulses.
(package private) static void	SKP_Silk_shell_encoder(SKP_Silk_range_coder_state sRC, int[] pulses0, int pulses0_offset) Shell encoder, operates on one shell code frame of 16 pulses.

Methods inherited from class java.lang.Object

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

Constructor Detail

Silk_shell_coder

public Silk_shell_coder()

Method Detail

combine_pulses

static void combine_pulses(int[] out,
                           int out_offset,
                           int[] in,
                           int in_offset,
                           int len)

Parameters:

out - combined pulses vector [len]

out_offset - offset of valid data.

in - input vector [2 * len]

in_offset - offset of valid data.

len - number of OUTPUT samples

encode_split

static void encode_split(SKP_Silk_range_coder_state sRC,
                         int p_child1,
                         int p,
                         int[] shell_table)

Parameters:

sRC - compressor data structure

p_child1 - pulse amplitude of first child subframe

p - pulse amplitude of current subframe

shell_table - table of shell cdfs

decode_split

static void decode_split(int[] p_child1,
                         int p_child1_offset,
                         int[] p_child2,
                         int p_child2_offset,
                         SKP_Silk_range_coder_state sRC,
                         int p,
                         int[] shell_table)

Parameters:

p_child1 - pulse amplitude of first child subframe

p_child1_offset - offset of valid data.

p_child2 - pulse amplitude of second child subframe

p_child2_offset - offset of valid data.

sRC - compressor data structure

p - pulse amplitude of current subframe

shell_table - table of shell cdfs

SKP_Silk_shell_encoder

static void SKP_Silk_shell_encoder(SKP_Silk_range_coder_state sRC,
                                   int[] pulses0,
                                   int pulses0_offset)

Shell encoder, operates on one shell code frame of 16 pulses.

Parameters:

sRC - compressor data structure.

pulses0 - data: nonnegative pulse amplitudes.

pulses0_offset - valid data

SKP_Silk_shell_decoder

static void SKP_Silk_shell_decoder(int[] pulses0,
                                   int pulses0_offset,
                                   SKP_Silk_range_coder_state sRC,
                                   int pulses4)

Shell decoder, operates on one shell code frame of 16 pulses.

Parameters:

pulses0 - data: nonnegative pulse amplitudes

pulses0_offset - offset of valid data.

sRC - compressor data structure

pulses4 - number of pulses per pulse-subframe