/*
***********************************************************************
*
* Copyright (C) 1999 Ericsson Radio Systems AB
* 
* The Association of Radio Industries and Businesses (ARIB) has the
* licence to reproduce, distribute and publish the Bit Exact C Code
* programs in this CD-ROM together with the other parts of the RCR
* STD-27 (Personal Digital Cellular Telecommunication System)
* specification.
* 
* Ericsson has declared Option 1 (royalty-free licence) to ARIB for
* its Essential Industrial Property Rights related to the ACELP
* specification and the Bit Exact C Code programs. The royalty-free
* licence is limited to the development and manufacturing of
* products complying with the RCR STD-27H specification (or
* subsequent versions) for sale and use in Japan. Copying of the
* program(s) for any other purpose requires the prior written
* permission from Ericsson.
* 
* The user of the Bit Exact C Code hereby acknowledges the
* following:
* 
* 1.  Ericsson does not provide the user with any warranties,
*     whether express or implied, including but not limited to
*     warranties of merchantability and fitness for a particular
*     purpose relating to the Bit Exact C Code.
* 
* 2.  Ericsson shall have no responsibility whatsoever to indemnify
*     the user against actions or claims for infringement of any
*     intellectual property rights, e.g. patents, copyrights,
*     registered designs or any other rights, by reason of the
*     user's use of the Bit Exact C Code.
* 
***********************************************************************
*/

/*************************************************************************
 *
 *  FUNCTION:  Reorder_lsf()
 *
 *  PURPOSE: To make sure that the LSFs are properly ordered and to keep a
 *           certain minimum distance between adjacent LSFs
 *           The LSFs are in the frequency range 0-0.5
 *
 *************************************************************************/

#include "typedef.h"
#include "basic_op.h"

void Reorder_lsf(
    Word16 * lsf,    /* (i/o)  : vector of LSFs   (range: 0<=val<=0.5) */
    Word16 min_dist, /* (i)    : minimum required distance             */
    Word16 n         /* (i)    : LPC order                             */
)
{
    Word16 i;
    Word16 lsf_min;

    lsf_min = min_dist;
    for (i = 0; i < n; i++) {
        if (sub(lsf[i], lsf_min) < 0) {
            lsf[i] = lsf_min;
        }
        lsf_min = add(lsf[i], min_dist);
    }
}
