/* nag_dwt_2d (c09eac) Example Program.
 *
 * Copyright 2017 Numerical Algorithms Group.
 *
 * Mark 26.2, 2017.
 */

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

int main(void)
{
  /* Scalars */
  Integer exit_status = 0;
  Integer i, j, m, n, nf, nwcm, nwcn, nwct, nwl, pda, pdb, pdc;
  /* Arrays */
  char mode[24], wavnam[20], title[50];
  double *a = 0, *b = 0, *ca = 0, *cd = 0, *ch = 0, *cv = 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_dwt_2d (c09eac) 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("%19s%23s%*[^\n]\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(" DWT :: Wavelet : %s\n", wavnam);
  printf("        End mode: %s\n", mode);
  fflush(stdout);

  /*
   * 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 */
#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));
  scanf("%*[^\n] ");

  printf("\n");
  fflush(stdout);
  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;
  }
  printf("\n");

  /* nag_wfilt_2d (c09abc).
   * Two-dimensional wavelet filter initialization
   */
  nag_wfilt_2d(wavnamenum, Nag_SingleLevel, 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;
  }
  nwcm = nwct / (4 * nwcn);
  if (!(ca = NAG_ALLOC((nwcm) * (nwcn), double)) ||
      !(cd = NAG_ALLOC((nwcm) * (nwcn), double)) ||
      !(cv = NAG_ALLOC((nwcm) * (nwcn), double)) ||
      !(ch = NAG_ALLOC((nwcm) * (nwcn), double))
         )
  {
    printf("Allocation failure\n");
    exit_status = -1;
    goto END;
  }

  pdc = nwcm;
  /* nag_dwt_2d (c09eac).
   * Two-dimensional discrete wavelet transform
   */
  nag_dwt_2d(m, n, a, pda, ca, pdc, ch, pdc, cv, pdc, cd, pdc, icomm, &fail);
  if (fail.code != NE_NOERROR) {
    printf("Error from nag_dwt_2d (c09eac).\n%s\n", fail.message);
    exit_status = 1;
    goto END;
  }
  fflush(stdout);

  /* Print decomposition */
  strcpy(title, "Approximation coefficients   CA :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, ca, pdc,
                              "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0,
                              0, &fail);
  printf("\n");
  fflush(stdout);
  strcpy(title, "Diagonal coefficients        CD :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, cd, pdc,
                              "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0,
                              0, &fail);
  printf("\n");
  fflush(stdout);
  strcpy(title, "Horizontal coefficients      CH :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, ch, pdc,
                              "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0,
                              0, &fail);
  printf("\n");
  fflush(stdout);
  strcpy(title, "Vertical coefficients        CV :");
  nag_gen_real_mat_print_comp(order, matrix, diag, nwcm, nwcn, cv, pdc,
                              "%8.4f",
                              title, Nag_NoLabels, 0, Nag_NoLabels, 0, 80, 0,
                              0, &fail);
  printf("\n");

  /* nag_idwt_2d (c09ebc).
   * Two-dimensional inverse discrete wavelet transform
   */
  nag_idwt_2d(m, n, ca, pdc, ch, pdc, cv, pdc, cd, pdc, b, pdb, icomm, &fail);
  if (fail.code != NE_NOERROR) {
    printf("Error from nag_idwt_2d (c09ebc).\n%s\n", fail.message);
    exit_status = 3;
    goto END;
  }
  fflush(stdout);

  /* Print reconstruction */
  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);
END:
  NAG_FREE(a);
  NAG_FREE(b);
  NAG_FREE(ca);
  NAG_FREE(cd);
  NAG_FREE(ch);
  NAG_FREE(cv);
  return exit_status;
}