pack.h

来自「g729 coding ipaddressing」· C头文件 代码 · 共 52 行

/**************************************************************************
*
* ROUTINE
*				pack (pack tau into binaru bit stream)
*
* FUNCTION
*				Input decimal value and number of binary bits, 
*				program returns binary value packed in array.
*
* SYNOPSIS
*				subroutine pack(value, bits, array, pointer)
*
*	formal 
*
*						data	I/O
*		name			type	type	function
*		-------------------------------------------------------------------
*		value			int 	i		decimal value
*		bits			int 	i		number of bits to convert to
*										(ie. 01001 for 5 bits, 1st 0 incl.)
*		array			short	o		array to which one bit is assigned
*										for binary representation
*		pointer 		int *	i/o 	points to appropriate element in
*										array
*
***************************************************************************
*
* DESCRIPTION
*
*		This program packs a decimal value into a binary value
*		to be decoded by unpack.c in CELP synthesizer sections.
*
***************************************************************************
*
* CALLED BY
*
*		celp
*
* CALLS
*
*
*
**************************************************************************/

static void pack(int value, int bits, short array[], int *a_pointer)
{
  int i;

  for (i = 0; i < bits; (*a_pointer)++, i++)
	array[*a_pointer] = (value & 1 << i) >> i;
}