/* nag_wfilt_2d (c09abc) Example Program.
 *
 * Copyright 2011, Numerical Algorithms Group.
 *
 * Mark 23, 2011.
 */

#include <stdio.h>
#include <string.h>
#include <nag.h>
#include <string.h>
#include <nag_stdlib.h>
#include <nagc09.h>
#include <nagx04.h>

int main(void)
{
  /* Scalars */
  Integer         exit_status = 0;
  Integer         i, j, lenc, m, n, nf, nwcn, nwct, nwl, pda, pdb;
  /* Arrays */
  char            mode[24], wavnam[20], title[27];
  double          *a = 0, *b = 0, *c = 0;
  Integer         *dwtlevm = 0, *dwtlevn = 0;
  Integer         icomm[180];
  /* Nag Types */
  Nag_Wavelet     wavnamenum;
  Nag_WaveletMode modenum;
  Nag_MatrixType  matrix = Nag_GeneralMatrix;
  Nag_OrderType   order = Nag_ColMajor;
  Nag_DiagType    diag = Nag_NonUnitDiag;
  NagError        fail;

  INIT_FAIL(fail);

  printf("nag_wfilt_2d (c09abc) Example Program Results\n\n");

  /* Skip heading in data file and read problem parameters */
  scanf("%*[^\n] %"NAG_IFMT "%"NAG_IFMT "%*[^\n] ",&m,&n);
  pda = m;
  pdb = m;
  scanf("%s%s%*[^\n] ", wavnam,mode);
  if ( !(a = NAG_ALLOC((pda)*(n), double)) ||
       !(b = NAG_ALLOC((pdb)*(n), double)) )
    {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }
  printf(" Parameters read from file :: \n");
  printf(" MLDWT :: Wavelet  : %s\n", wavnam);
  printf("          End mode : %s\n", mode);
  printf("          m        : %" NAG_IFMT "\n", m);
  printf("          n        : %" NAG_IFMT "\n\n", n);

  /*
   * nag_enum_name_to_value (x04nac).
   * Converts NAG enum member name to value
   */
  wavnamenum = (Nag_Wavelet) nag_enum_name_to_value(wavnam);
  modenum = (Nag_WaveletMode) nag_enum_name_to_value(mode);

  /* Read data array and write it out*/
#define A(I, J) a[(J-1)*pda + I-1]
  for (i = 1; i <= m; i++)
    for (j = 1; j <= n; j++) scanf("%lf", &A(i, j));

  nag_gen_real_mat_print_comp(order, matrix, diag, m, n, a, pda, "%8.4f",
			      "Input Data     A :",  Nag_NoLabels, 0,
			      Nag_NoLabels, 0, 80, 0, 0, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_gen_real_mat_print_comp (x04cbc).\n%s\n",
	     fail.message);
      exit_status = 1;
      goto END;
    }

  /*
   * nag_wfilt_2d (c09abc).
   * Two-dimensional wavelet filter initialization
   */
  nag_wfilt_2d(wavnamenum, Nag_MultiLevel, modenum, m, n, &nwl, &nf, &nwct,
	       &nwcn, icomm, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_wfilt_2d (c09abc).\n%s\n", fail.message);
      exit_status = 2;
      goto END;
    }
  lenc = nwct;
  if (
    !(c = NAG_ALLOC((lenc), double)) ||
    !(dwtlevm = NAG_ALLOC((nwl), Integer)) ||
    !(dwtlevn = NAG_ALLOC((nwl), Integer))
    )
    {
      printf("Allocation failure\n");
      exit_status = -2;
      goto END;
    }

  /*
   * nag_mldwt_2d (c09ecc).
   * Two-dimensional multi-level discrete wavelet transform
   */
  nag_mldwt_2d(m, n, a, pda, lenc, c, nwl, dwtlevm, dwtlevn, icomm, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_mldwt_2d (c09ecc).\n%s\n", fail.message);
      exit_status = 3;
      goto END;
    }

  /* Print decomposition */
  printf("\n Length of wavelet filter : %12s%"NAG_IFMT " \n", "", nf);
  printf("\n\n Number of Levels : %ld\n", nwl);
  printf(" Number of coefficients in 1st dimension for each level :\n");
  for (j = 0; j < nwl; j++) 
    printf("%8ld%s", dwtlevm[j], (j+1)%8?" ":"\n");

  printf("\n Number of coefficients in 2nd dimension for each level :\n");
  for (j = 0; j < nwl; j++) 
    printf("%8ld%s", dwtlevn[j], (j+1)%8?" ":"\n");

  printf("\n Total number of wavelet coefficients : ");
  printf("%10"NAG_IFMT " \n\n", nwct);
  printf(" Wavelet coefficients c :  \n");
  for (j = 0; j < nwct; j++) printf("%8.4f%s", c[j], (j+1)%8?" ":"\n");
  printf("\n");

  /*
     nag_imldwt_2d (c09edc).
     Two-dimensional inverse multi-level discrete wavelet transform
   */
  nag_imldwt_2d(nwl, lenc, c, m, n, b, pdb, icomm, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_imldwt_2d (c09edc).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }

  /* Print reconstruction */
  printf("\n");
  strcpy(title, "Reconstruction           B :");
  nag_gen_real_mat_print_comp(order, matrix, diag, m, n, b, pdb, "%8.4f", title,
			      Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0, 0,
			      &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_gen_real_mat_print_comp (x04cbc).\n%s\n",
	     fail.message);
      exit_status = 6;
      goto END;
    }
 END:
  if (a) NAG_FREE(a);
  if (b) NAG_FREE(b);
  if (c) NAG_FREE(c);
  if (dwtlevm) NAG_FREE(dwtlevm);
  if (dwtlevn) NAG_FREE(dwtlevn);
  return exit_status;
}