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annotate libinterp/corefcn/fft2.cc @ 22407:34ce5be04942

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maint: Style check C++ code in libinterp/. * build-env.h, build-env.in.cc, builtins.h, Cell.cc, Cell.h, __contourc__.cc, __dispatch__.cc, __dsearchn__.cc, __ilu__.cc, __lin_interpn__.cc, __luinc__.cc, __magick_read__.cc, __pchip_deriv__.cc, __qp__.cc, balance.cc, base-text-renderer.h, besselj.cc, bitfcns.cc, bsxfun.cc, c-file-ptr-stream.cc, c-file-ptr-stream.h, call-stack.cc, call-stack.h, cdisplay.c, cdisplay.h, cellfun.cc, coct-hdf5-types.c, comment-list.cc, comment-list.h, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, data.h, debug.cc, debug.h, defaults.cc, defaults.in.h, defun-dld.h, defun-int.h, defun.h, det.cc, dirfns.cc, dirfns.h, display.cc, display.h, dlmread.cc, dynamic-ld.cc, dynamic-ld.h, eig.cc, error.cc, error.h, errwarn.h, event-queue.cc, event-queue.h, fft.cc, fft2.cc, fftn.cc, file-io.cc, file-io.h, filter.cc, find.cc, ft-text-renderer.cc, ft-text-renderer.h, gammainc.cc, gcd.cc, getgrent.cc, getpwent.cc, givens.cc, gl-render.cc, gl-render.h, gl2ps-print.cc, gl2ps-print.h, graphics.cc, graphics.in.h, gripes.h, gsvd.cc, hash.cc, help.cc, help.h, hess.cc, hex2num.cc, hook-fcn.cc, hook-fcn.h, input.cc, input.h, interpreter.cc, interpreter.h, inv.cc, jit-ir.cc, jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.cc, jit-util.h, kron.cc, load-path.cc, load-path.h, load-save.cc, load-save.h, lookup.cc, ls-ascii-helper.cc, ls-ascii-helper.h, ls-hdf5.cc, ls-hdf5.h, ls-mat-ascii.cc, ls-mat-ascii.h, ls-mat4.cc, ls-mat4.h, ls-mat5.h, ls-oct-binary.cc, ls-oct-binary.h, ls-oct-text.cc, ls-oct-text.h, ls-utils.cc, ls-utils.h, lsode.cc, lu.cc, matrix_type.cc, max.cc, mex.cc, mex.h, mexproto.h, mgorth.cc, mxarray.in.h, nproc.cc, oct-errno.h, oct-errno.in.cc, oct-fstrm.cc, oct-fstrm.h, oct-handle.h, oct-hdf5-types.cc, oct-hdf5-types.h, oct-hdf5.h, oct-hist.cc, oct-hist.h, oct-iostrm.cc, oct-iostrm.h, oct-lvalue.cc, oct-lvalue.h, oct-map.h, oct-obj.h, oct-opengl.h, oct-prcstrm.cc, oct-prcstrm.h, oct-procbuf.cc, oct-procbuf.h, oct-stdstrm.h, oct-stream.cc, oct-stream.h, oct-strstrm.cc, oct-strstrm.h, oct.h, octave-default-image.h, octave-link.h, octave-preserve-stream-state.h, ordschur.cc, pager.cc, pager.h, pinv.cc, pr-output.cc, pr-output.h, procstream.cc, procstream.h, profiler.h, psi.cc, pt-jit.cc, pt-jit.h, quad.cc, quadcc.cc, qz.cc, rand.cc, rcond.cc, regexp.cc, schur.cc, sighandlers.cc, sighandlers.h, sparse-xdiv.cc, sparse-xdiv.h, sparse-xpow.cc, sparse-xpow.h, sparse.cc, spparms.cc, sqrtm.cc, str2double.cc, strfind.cc, strfns.cc, sub2ind.cc, svd.cc, sylvester.cc, symtab.cc, symtab.h, syscalls.cc, sysdep.cc, sysdep.h, text-renderer.cc, text-renderer.h, time.cc, toplev.cc, toplev.h, tril.cc, tsearch.cc, txt-eng.cc, txt-eng.h, typecast.cc, urlwrite.cc, utils.cc, utils.h, variables.cc, variables.h, workspace-element.h, xdiv.cc, xdiv.h, xnorm.cc, xnorm.h, xpow.cc, xpow.h, zfstream.cc, zfstream.h, deprecated-config.h, __delaunayn__.cc, __eigs__.cc, __fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc, __init_gnuplot__.cc, __osmesa_print__.cc, __voronoi__.cc, amd.cc, audiodevinfo.cc, audioread.cc, ccolamd.cc, chol.cc, colamd.cc, convhulln.cc, dmperm.cc, fftw.cc, gzip.cc, oct-qhull.h, qr.cc, symbfact.cc, symrcm.cc, liboctinterp-build-info.h, liboctinterp-build-info.in.cc, ov-base-diag.h, ov-base-int.cc, ov-base-int.h, ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.h, ov-base-sparse.cc, ov-base-sparse.h, ov-base.cc, ov-base.h, ov-bool-mat.cc, ov-bool-mat.h, ov-bool-sparse.cc, ov-bool-sparse.h, ov-bool.cc, ov-bool.h, ov-builtin.cc, ov-builtin.h, ov-cell.cc, ov-cell.h, ov-ch-mat.cc, ov-ch-mat.h, ov-class.cc, ov-class.h, ov-classdef.cc, ov-classdef.h, ov-colon.cc, ov-colon.h, ov-complex.cc, ov-complex.h, ov-cs-list.h, ov-cx-diag.cc, ov-cx-diag.h, ov-cx-mat.cc, ov-cx-mat.h, ov-cx-sparse.cc, ov-cx-sparse.h, ov-dld-fcn.cc, ov-dld-fcn.h, ov-fcn-handle.cc, ov-fcn-handle.h, ov-fcn-inline.cc, ov-fcn-inline.h, ov-fcn.cc, ov-fcn.h, ov-float.cc, ov-float.h, ov-flt-complex.cc, ov-flt-complex.h, ov-flt-cx-diag.cc, ov-flt-cx-diag.h, ov-flt-cx-mat.cc, ov-flt-cx-mat.h, ov-flt-re-diag.cc, ov-flt-re-diag.h, ov-flt-re-mat.cc, ov-flt-re-mat.h, ov-int-traits.h, ov-int16.cc, ov-int16.h, ov-int32.cc, ov-int32.h, ov-int64.cc, ov-int64.h, ov-int8.cc, ov-int8.h, ov-intx.h, ov-java.cc, ov-java.h, ov-lazy-idx.cc, ov-lazy-idx.h, ov-mex-fcn.cc, ov-mex-fcn.h, ov-null-mat.cc, ov-null-mat.h, ov-oncleanup.cc, ov-oncleanup.h, ov-perm.cc, ov-perm.h, ov-range.cc, ov-range.h, ov-re-diag.cc, ov-re-diag.h, ov-re-mat.cc, ov-re-mat.h, ov-re-sparse.cc, ov-re-sparse.h, ov-scalar.cc, ov-scalar.h, ov-str-mat.cc, ov-str-mat.h, ov-struct.cc, ov-struct.h, ov-typeinfo.cc, ov-typeinfo.h, ov-uint16.cc, ov-uint16.h, ov-uint32.cc, ov-uint32.h, ov-uint64.cc, ov-uint64.h, ov-uint8.cc, ov-uint8.h, ov-usr-fcn.cc, ov-usr-fcn.h, ov.h, ovl.cc, ovl.h, octave.cc, octave.h, op-b-b.cc, op-b-bm.cc, op-b-sbm.cc, op-bm-b.cc, op-bm-bm.cc, op-bm-sbm.cc, op-cdm-cdm.cc, op-cell.cc, op-chm.cc, op-class.cc, op-cm-cm.cc, op-cm-cs.cc, op-cm-m.cc, op-cm-pm.cc, op-cm-s.cc, op-cm-scm.cc, op-cm-sm.cc, op-cs-cm.cc, op-cs-cs.cc, op-cs-m.cc, op-cs-s.cc, op-cs-scm.cc, op-cs-sm.cc, op-dm-dm.cc, op-dm-scm.cc, op-dm-sm.cc, op-dm-template.cc, op-dms-template.cc, op-fcdm-fcdm.cc, op-fcm-fcm.cc, op-fcm-fcs.cc, op-fcm-fm.cc, op-fcm-fs.cc, op-fcm-pm.cc, op-fcn.cc, op-fcs-fcm.cc, op-fcs-fcs.cc, op-fcs-fm.cc, op-fcs-fs.cc, op-fdm-fdm.cc, op-fm-fcm.cc, op-fm-fcs.cc, op-fm-fm.cc, op-fm-fs.cc, op-fm-pm.cc, op-fs-fcm.cc, op-fs-fcs.cc, op-fs-fm.cc, op-fs-fs.cc, op-i16-i16.cc, op-i32-i32.cc, op-i64-i64.cc, op-i8-i8.cc, op-int-concat.cc, op-int.h, op-m-cm.cc, op-m-cs.cc, op-m-m.cc, op-m-pm.cc, op-m-s.cc, op-m-scm.cc, op-m-sm.cc, op-pm-cm.cc, op-pm-fcm.cc, op-pm-fm.cc, op-pm-m.cc, op-pm-pm.cc, op-pm-scm.cc, op-pm-sm.cc, op-pm-template.cc, op-range.cc, op-s-cm.cc, op-s-cs.cc, op-s-m.cc, op-s-s.cc, op-s-scm.cc, op-s-sm.cc, op-sbm-b.cc, op-sbm-bm.cc, op-sbm-sbm.cc, op-scm-cm.cc, op-scm-cs.cc, op-scm-m.cc, op-scm-s.cc, op-scm-scm.cc, op-scm-sm.cc, op-sm-cm.cc, op-sm-cs.cc, op-sm-m.cc, op-sm-s.cc, op-sm-scm.cc, op-sm-sm.cc, op-str-m.cc, op-str-s.cc, op-str-str.cc, op-struct.cc, op-ui16-ui16.cc, op-ui32-ui32.cc, op-ui64-ui64.cc, op-ui8-ui8.cc, ops.h, options-usage.h, lex.h, parse.h, pt-all.h, pt-arg-list.cc, pt-arg-list.h, pt-array-list.h, pt-assign.cc, pt-assign.h, pt-binop.cc, pt-binop.h, pt-bp.cc, pt-bp.h, pt-cbinop.cc, pt-cbinop.h, pt-cell.cc, pt-cell.h, pt-check.cc, pt-check.h, pt-classdef.cc, pt-classdef.h, pt-cmd.cc, pt-cmd.h, pt-colon.cc, pt-colon.h, pt-const.cc, pt-const.h, pt-decl.cc, pt-decl.h, pt-eval.cc, pt-eval.h, pt-except.cc, pt-except.h, pt-exp.cc, pt-exp.h, pt-fcn-handle.cc, pt-fcn-handle.h, pt-funcall.cc, pt-funcall.h, pt-id.cc, pt-id.h, pt-idx.cc, pt-idx.h, pt-jump.cc, pt-jump.h, pt-loop.cc, pt-loop.h, pt-mat.cc, pt-mat.h, pt-misc.cc, pt-misc.h, pt-pr-code.cc, pt-pr-code.h, pt-select.cc, pt-select.h, pt-stmt.cc, pt-stmt.h, pt-unop.cc, pt-unop.h, pt-walk.h, pt.cc, pt.h, token.cc, token.h, Array-jit.cc, Array-tc.cc, version.cc, version.in.h: Style check C++ code in libinterp/
author Rik <rik@octave.org>
date Tue, 30 Aug 2016 21:46:47 -0700
parents bac0d6f07a3e
children 7abc25e6206a e9a0469dedd9
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1 /*
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2
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3 Copyright (C) 1997-2016 David Bateman
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4 Copyright (C) 1996-1997 John W. Eaton
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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22 */
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23
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24 #if defined (HAVE_CONFIG_H)
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25 # include "config.h"
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26 #endif
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28 #include "lo-mappers.h"
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29
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30 #include "defun.h"
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31 #include "error.h"
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32 #include "errwarn.h"
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33 #include "ovl.h"
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34 #include "utils.h"
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35
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36 // This function should be merged with Fifft.
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37
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38 #if defined (HAVE_FFTW)
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39 # define FFTSRC "@sc{fftw}"
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40 #else
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41 # define FFTSRC "@sc{fftpack}"
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42 #endif
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44 static octave_value
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45 do_fft2 (const octave_value_list &args, const char *fcn, int type)
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46 {
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47 int nargin = args.length ();
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48
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49 if (nargin < 1 || nargin > 3)
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50 print_usage ();
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51
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52 octave_value retval;
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53 octave_value arg = args(0);
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54 dim_vector dims = arg.dims ();
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55 octave_idx_type n_rows = -1;
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57 if (nargin > 1)
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58 {
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59 double dval = args(1).double_value ();
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60 if (octave::math::isnan (dval))
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61 error ("%s: number of rows (N) cannot be NaN", fcn);
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62
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63 n_rows = octave::math::nint_big (dval);
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64 if (n_rows < 0)
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65 error ("%s: number of rows (N) must be greater than zero", fcn);
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66 }
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68 octave_idx_type n_cols = -1;
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69 if (nargin > 2)
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70 {
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71 double dval = args(2).double_value ();
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72 if (octave::math::isnan (dval))
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75 n_cols = octave::math::nint_big (dval);
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76 if (n_cols < 0)
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77 error ("%s: number of columns (M) must be greater than zero", fcn);
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78 }
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80 for (int i = 0; i < dims.ndims (); i++)
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81 if (dims(i) < 0)
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82 return retval;
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diff changeset
83
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84 if (n_rows < 0)
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85 n_rows = dims(0);
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86 else
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87 dims(0) = n_rows;
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88
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89 if (n_cols < 0)
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90 n_cols = dims(1);
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91 else
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92 dims(1) = n_cols;
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93
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diff changeset
94 if (dims.all_zero () || n_rows == 0 || n_cols == 0)
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95 {
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96 if (arg.is_single_type ())
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97 return octave_value (FloatMatrix ());
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98 else
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99 return octave_value (Matrix ());
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100 }
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101
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102 if (arg.is_single_type ())
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103 {
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104 if (arg.is_real_type ())
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105 {
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106 FloatNDArray nda = arg.float_array_value ();
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107
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108 nda.resize (dims, 0.0);
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109 retval = (type != 0 ? nda.ifourier2d () : nda.fourier2d ());
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110 }
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diff changeset
111 else
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112 {
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113 FloatComplexNDArray cnda = arg.float_complex_array_value ();
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114
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115 cnda.resize (dims, 0.0);
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116 retval = (type != 0 ? cnda.ifourier2d () : cnda.fourier2d ());
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117 }
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118 }
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119 else
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120 {
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121 if (arg.is_real_type ())
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122 {
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123 NDArray nda = arg.array_value ();
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124
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125 nda.resize (dims, 0.0);
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126 retval = (type != 0 ? nda.ifourier2d () : nda.fourier2d ());
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127 }
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128 else if (arg.is_complex_type ())
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129 {
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130 ComplexNDArray cnda = arg.complex_array_value ();
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131
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132 cnda.resize (dims, 0.0);
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133 retval = (type != 0 ? cnda.ifourier2d () : cnda.fourier2d ());
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134 }
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diff changeset
135 else
21100
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Rik <rik@octave.org>
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diff changeset
136 err_wrong_type_arg (fcn, arg);
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137 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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diff changeset
138
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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diff changeset
139 return retval;
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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parents:
diff changeset
140 }
295f037b4b3e [project @ 1997-05-05 05:32:33 by jwe]
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diff changeset
141
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diff changeset
142 DEFUN (fft2, args, ,
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143 doc: /* -*- texinfo -*-
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diff changeset
144 @deftypefn {} {} fft2 (@var{A})
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145 @deftypefnx {} {} fft2 (@var{A}, @var{m}, @var{n})
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diff changeset
146 Compute the two-dimensional discrete Fourier transform of @var{A} using
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diff changeset
147 a Fast Fourier Transform (FFT) algorithm.
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148
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149 The optional arguments @var{m} and @var{n} may be used specify the number of
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150 rows and columns of @var{A} to use. If either of these is larger than the
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151 size of @var{A}, @var{A} is resized and padded with zeros.
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152
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diff changeset
153 If @var{A} is a multi-dimensional matrix, each two-dimensional sub-matrix
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154 of @var{A} is treated separately.
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diff changeset
155 @seealso{ifft2, fft, fftn, fftw}
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diff changeset
156 @end deftypefn */)
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157 {
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diff changeset
158 return do_fft2 (args, "fft2", 0);
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159 }
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160
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diff changeset
161
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diff changeset
162 DEFUN (ifft2, args, ,
21966
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163 doc: /* -*- texinfo -*-
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diff changeset
164 @deftypefn {} {} ifft2 (@var{A})
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165 @deftypefnx {} {} ifft2 (@var{A}, @var{m}, @var{n})
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diff changeset
166 Compute the inverse two-dimensional discrete Fourier transform of @var{A}
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diff changeset
167 using a Fast Fourier Transform (FFT) algorithm.
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diff changeset
168
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diff changeset
169 The optional arguments @var{m} and @var{n} may be used specify the number of
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diff changeset
170 rows and columns of @var{A} to use. If either of these is larger than the
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diff changeset
171 size of @var{A}, @var{A} is resized and padded with zeros.
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diff changeset
172
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diff changeset
173 If @var{A} is a multi-dimensional matrix, each two-dimensional sub-matrix
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174 of @var{A} is treated separately
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diff changeset
175 @seealso{fft2, ifft, ifftn, fftw}
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diff changeset
176 @end deftypefn */)
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177 {
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178 return do_fft2 (args, "ifft2", 1);
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diff changeset
179 }
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diff changeset
180
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181 /*
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182 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
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183 %% Comalco Research and Technology
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184 %% 02 May 2000
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185 %!test
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186 %! M = 16;
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187 %! N = 8;
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188 %!
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189 %! m = 5;
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190 %! n = 3;
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191 %!
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diff changeset
192 %! x = 2*pi*(0:1:M-1)/M;
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193 %! y = 2*pi*(0:1:N-1)/N;
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194 %! sx = cos (m*x);
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195 %! sy = sin (n*y);
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196 %! s = kron (sx',sy);
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197 %! S = fft2 (s);
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198 %! answer = kron (fft (sx)', fft (sy));
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199 %! assert (S, answer, 4*M*N*eps);
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200
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201 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
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202 %% Comalco Research and Technology
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203 %% 02 May 2000
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204 %!test
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205 %! M = 12;
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206 %! N = 7;
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207 %!
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208 %! m = 3;
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209 %! n = 2;
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210 %!
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211 %! x = 2*pi*(0:1:M-1)/M;
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212 %! y = 2*pi*(0:1:N-1)/N;
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213 %!
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214 %! sx = cos (m*x);
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215 %! sy = cos (n*y);
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216 %!
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217 %! S = kron (fft (sx)', fft (sy));
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218 %! answer = kron (sx', sy);
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219 %! s = ifft2 (S);
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220 %!
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221 %! assert (s, answer, 30*eps);
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222
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223 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
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224 %% Comalco Research and Technology
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225 %% 02 May 2000
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226 %!test
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227 %! M = 16;
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228 %! N = 8;
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229 %!
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230 %! m = 5;
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231 %! n = 3;
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232 %!
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233 %! x = 2*pi*(0:1:M-1)/M;
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234 %! y = 2*pi*(0:1:N-1)/N;
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235 %! sx = single (cos (m*x));
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236 %! sy = single (sin (n*y));
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237 %! s = kron (sx', sy);
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238 %! S = fft2 (s);
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239 %! answer = kron (fft (sx)', fft (sy));
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240 %! assert (S, answer, 4*M*N*eps ("single"));
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241
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242 %% Author: David Billinghurst (David.Billinghurst@riotinto.com.au)
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243 %% Comalco Research and Technology
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244 %% 02 May 2000
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245 %!test
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246 %! M = 12;
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247 %! N = 7;
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248 %!
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249 %! m = 3;
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250 %! n = 2;
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251 %!
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252 %! x = single (2*pi*(0:1:M-1)/M);
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253 %! y = single (2*pi*(0:1:N-1)/N);
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254 %!
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255 %! sx = cos (m*x);
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256 %! sy = cos (n*y);
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257 %!
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258 %! S = kron (fft (sx)', fft (sy));
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259 %! answer = kron (sx', sy);
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260 %! s = ifft2 (S);
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261 %!
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262 %! assert (s, answer, 30*eps ("single"));
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263 */
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264