/*
 * Copyright (c) 1999-2000 Image Power, Inc. and the University of
 *   British Columbia.
 * Copyright (c) 2001-2003 Michael David Adams.
 * All rights reserved.
 */

/* __START_OF_JASPER_LICENSE__
 * 
 * JasPer License Version 2.0
 * 
 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 * Copyright (c) 2001-2003 Michael David Adams
 * 
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person (the
 * "User") obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 * 
 * 1.  The above copyright notices and this permission notice (which
 * includes the disclaimer below) shall be included in all copies or
 * substantial portions of the Software.
 * 
 * 2.  The name of a copyright holder shall not be used to endorse or
 * promote products derived from the Software without specific prior
 * written permission.
 * 
 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
 * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
 * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
 * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
 * 
 * __END_OF_JASPER_LICENSE__
 */

/*
 * $Id: jpc_util.c,v 1.1 2005/05/22 18:33:06 malaterre Exp $
 */

/******************************************************************************\
* Includes
\******************************************************************************/

#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <stdarg.h>

#include "jasper/jas_math.h"
#include "jasper/jas_malloc.h"

#include "jpc_fix.h"
#include "jpc_cs.h"
#include "jpc_flt.h"
#include "jpc_util.h"

/******************************************************************************\
* Miscellaneous Functions
\******************************************************************************/

int jpc_atoaf(char *s, int *numvalues, double **values)
{
  static char delim[] = ", \t\n";
  char buf[4096];
  int n;
  double *vs;
  char *cp;

  strncpy(buf, s, sizeof(buf));
  buf[sizeof(buf) - 1] = '\0';
  n = 0;
  if ((cp = strtok(buf, delim))) {
    ++n;
    while ((cp = strtok(0, delim))) {
      if (cp != '\0') {
        ++n;
      }
    }
  }

  if (n) {
    if (!(vs = jas_malloc(n * sizeof(double)))) {
      return -1;
    }

    strncpy(buf, s, sizeof(buf));
    buf[sizeof(buf) - 1] = '\0';
    n = 0;
    if ((cp = strtok(buf, delim))) {
      vs[n] = atof(cp);
      ++n;
      while ((cp = strtok(0, delim))) {
        if (cp != '\0') {
          vs[n] = atof(cp);
          ++n;
        }
      }
    }
  } else {
    vs = 0;
  }

  *numvalues = n;
  *values = vs;

  return 0;
}

jas_seq_t *jpc_seq_upsample(jas_seq_t *x, int m)
{
  jas_seq_t *z;
  int i;

  if (!(z = jas_seq_create(jas_seq_start(x) * m, (jas_seq_end(x) - 1) * m + 1)))
    return 0;
  for (i = jas_seq_start(z); i < jas_seq_end(z); i++) {
    *jas_seq_getref(z, i) = (!JAS_MOD(i, m)) ? jas_seq_get(x, i / m) :
      jpc_inttofix(0);
  }

  return z;
}

jpc_fix_t jpc_seq_norm(jas_seq_t *x)
{
  jpc_fix_t s;
  int i;

  s = jpc_inttofix(0);
  for (i = jas_seq_start(x); i < jas_seq_end(x); i++) {
    s = jpc_fix_add(s, jpc_fix_mul(jas_seq_get(x, i), jas_seq_get(x, i)));
  }

  return jpc_dbltofix(sqrt(jpc_fixtodbl(s)));
}

jas_seq_t *jpc_seq_conv(jas_seq_t *x, jas_seq_t *y)
{
  int i;
  int j;
  int k;
  jas_seq_t *z;
  jpc_fix_t s;
  jpc_fix_t v;

  z = jas_seq_create(jas_seq_start(x) + jas_seq_start(y),
    jas_seq_end(x) + jas_seq_end(y) - 1);
  assert(z);
  for (i = jas_seq_start(z); i < jas_seq_end(z); i++) {
    s = jpc_inttofix(0);
    for (j = jas_seq_start(y); j < jas_seq_end(y); j++) {
      k = i - j;
      if (k < jas_seq_start(x) || k >= jas_seq_end(x)) {
        v = JPC_FIX_ZERO;
      } else {
        v = jas_seq_get(x, k);
      }
      s = jpc_fix_add(s, jpc_fix_mul(jas_seq_get(y, j), v));
    }
    *jas_seq_getref(z, i) = s;
  }

  return z;
}