One of the interface classes to the FFTW package, can be used directly or via the TVirtualFFT class.
Only the basic interface of FFTW is implemented.
Computes transforms called r2r in FFTW manual:
How to use it:
For a transform of the same size, but of different kind (or with different flags), rerun the Init() function and continue with steps 3)-5)
NOTE:
Transform inverses:
Definition at line 20 of file TFFTReal.h.
Public Member Functions | |
TFFTReal () | |
default More... | |
TFFTReal (Int_t n, Bool_t inPlace=kFALSE) | |
For 1d transforms n here is the physical size of the transform (see FFTW manual for more details) More... | |
TFFTReal (Int_t ndim, Int_t *n, Bool_t inPlace=kFALSE) | |
For multidimensional transforms 1st parameter is the # of dimensions, 2nd is the sizes (physical) of the transform in each dimension. More... | |
virtual | ~TFFTReal () |
clean-up More... | |
virtual Int_t * | GetN () const |
virtual Int_t | GetNdim () const |
virtual void | GetPointComplex (const Int_t *ipoint, Double_t &re, Double_t &im, Bool_t fromInput=kFALSE) const |
Only for input of HC2R and output of R2HC and for 1d. More... | |
virtual void | GetPointComplex (Int_t ipoint, Double_t &re, Double_t &im, Bool_t fromInput=kFALSE) const |
Only for input of HC2R and output of R2HC. More... | |
virtual Double_t | GetPointReal (const Int_t *ipoint, Bool_t fromInput=kFALSE) const |
For multidim.transforms. Returns point #ipoint. More... | |
virtual Double_t | GetPointReal (Int_t ipoint, Bool_t fromInput=kFALSE) const |
For 1d tranforms. Returns point #ipoint. More... | |
virtual void | GetPoints (Double_t *data, Bool_t fromInput=kFALSE) const |
Copies the output (or input) points into the provided array, that should be big enough. More... | |
virtual void | GetPointsComplex (Double_t *, Bool_t) const |
virtual void | GetPointsComplex (Double_t *, Double_t *, Bool_t) const |
virtual Double_t * | GetPointsReal (Bool_t fromInput=kFALSE) const |
Returns the output (or input) array we have 4 different cases: More... | |
virtual Int_t | GetSign () const |
virtual Int_t | GetSize () const |
virtual Option_t * | GetTransformFlag () const |
virtual Option_t * | GetType () const |
Returns the type of the transform. More... | |
virtual void | Init (Option_t *flags, Int_t sign, const Int_t *kind) |
Creates the fftw-plan. More... | |
virtual Bool_t | IsInplace () const |
virtual void | SetPoint (const Int_t *ipoint, Double_t re, Double_t) |
Since multidimensional R2HC and HC2R transforms are not supported, third parameter is dummy. More... | |
virtual void | SetPoint (Int_t ipoint, Double_t re, Double_t im=0) |
virtual void | SetPointComplex (Int_t, TComplex &) |
virtual void | SetPoints (const Double_t *data) |
Sets all points. More... | |
virtual void | SetPointsComplex (const Double_t *, const Double_t *) |
virtual void | Transform () |
Computes the transform, specified in Init() function. More... | |
Public Member Functions inherited from TVirtualFFT | |
TVirtualFFT () | |
virtual | ~TVirtualFFT () |
destructor More... | |
virtual Int_t * | GetN () const =0 |
virtual Int_t | GetNdim () const =0 |
virtual void | GetPointComplex (const Int_t *ipoint, Double_t &re, Double_t &im, Bool_t fromInput=kFALSE) const =0 |
virtual void | GetPointComplex (Int_t ipoint, Double_t &re, Double_t &im, Bool_t fromInput=kFALSE) const =0 |
virtual Double_t | GetPointReal (const Int_t *ipoint, Bool_t fromInput=kFALSE) const =0 |
virtual Double_t | GetPointReal (Int_t ipoint, Bool_t fromInput=kFALSE) const =0 |
virtual void | GetPoints (Double_t *data, Bool_t fromInput=kFALSE) const =0 |
virtual void | GetPointsComplex (Double_t *data, Bool_t fromInput=kFALSE) const =0 |
virtual void | GetPointsComplex (Double_t *re, Double_t *im, Bool_t fromInput=kFALSE) const =0 |
virtual Double_t * | GetPointsReal (Bool_t fromInput=kFALSE) const =0 |
virtual Int_t | GetSign () const =0 |
virtual Option_t * | GetTransformFlag () const =0 |
virtual Option_t * | GetType () const =0 |
virtual void | Init (Option_t *flag, Int_t sign, const Int_t *kind)=0 |
virtual Bool_t | IsInplace () const =0 |
virtual void | SetPoint (const Int_t *ipoint, Double_t re, Double_t im=0)=0 |
virtual void | SetPoint (Int_t ipoint, Double_t re, Double_t im=0)=0 |
virtual void | SetPointComplex (Int_t ipoint, TComplex &c)=0 |
virtual void | SetPoints (const Double_t *data)=0 |
virtual void | SetPointsComplex (const Double_t *re, const Double_t *im)=0 |
virtual void | Transform ()=0 |
Public Member Functions inherited from TObject | |
TObject () | |
TObject constructor. More... | |
TObject (const TObject &object) | |
TObject copy ctor. More... | |
virtual | ~TObject () |
TObject destructor. More... | |
void | AbstractMethod (const char *method) const |
Use this method to implement an "abstract" method that you don't want to leave purely abstract. More... | |
virtual void | AppendPad (Option_t *option="") |
Append graphics object to current pad. More... | |
virtual void | Browse (TBrowser *b) |
Browse object. May be overridden for another default action. More... | |
ULong_t | CheckedHash () |
Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. More... | |
virtual const char * | ClassName () const |
Returns name of class to which the object belongs. More... | |
virtual void | Clear (Option_t *="") |
virtual TObject * | Clone (const char *newname="") const |
Make a clone of an object using the Streamer facility. More... | |
virtual Int_t | Compare (const TObject *obj) const |
Compare abstract method. More... | |
virtual void | Copy (TObject &object) const |
Copy this to obj. More... | |
virtual void | Delete (Option_t *option="") |
Delete this object. More... | |
virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
Computes distance from point (px,py) to the object. More... | |
virtual void | Draw (Option_t *option="") |
Default Draw method for all objects. More... | |
virtual void | DrawClass () const |
Draw class inheritance tree of the class to which this object belongs. More... | |
virtual TObject * | DrawClone (Option_t *option="") const |
Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad) . More... | |
virtual void | Dump () const |
Dump contents of object on stdout. More... | |
virtual void | Error (const char *method, const char *msgfmt,...) const |
Issue error message. More... | |
virtual void | Execute (const char *method, const char *params, Int_t *error=0) |
Execute method on this object with the given parameter string, e.g. More... | |
virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=0) |
Execute method on this object with parameters stored in the TObjArray. More... | |
virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
Execute action corresponding to an event at (px,py). More... | |
virtual void | Fatal (const char *method, const char *msgfmt,...) const |
Issue fatal error message. More... | |
virtual TObject * | FindObject (const char *name) const |
Must be redefined in derived classes. More... | |
virtual TObject * | FindObject (const TObject *obj) const |
Must be redefined in derived classes. More... | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. More... | |
virtual const char * | GetIconName () const |
Returns mime type name of object. More... | |
virtual const char * | GetName () const |
Returns name of object. More... | |
virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
Returns string containing info about the object at position (px,py). More... | |
virtual Option_t * | GetOption () const |
virtual const char * | GetTitle () const |
Returns title of object. More... | |
virtual UInt_t | GetUniqueID () const |
Return the unique object id. More... | |
virtual Bool_t | HandleTimer (TTimer *timer) |
Execute action in response of a timer timing out. More... | |
virtual ULong_t | Hash () const |
Return hash value for this object. More... | |
Bool_t | HasInconsistentHash () const |
Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. More... | |
virtual void | Info (const char *method, const char *msgfmt,...) const |
Issue info message. More... | |
virtual Bool_t | InheritsFrom (const char *classname) const |
Returns kTRUE if object inherits from class "classname". More... | |
virtual Bool_t | InheritsFrom (const TClass *cl) const |
Returns kTRUE if object inherits from TClass cl. More... | |
virtual void | Inspect () const |
Dump contents of this object in a graphics canvas. More... | |
void | InvertBit (UInt_t f) |
virtual Bool_t | IsEqual (const TObject *obj) const |
Default equal comparison (objects are equal if they have the same address in memory). More... | |
virtual Bool_t | IsFolder () const |
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More... | |
R__ALWAYS_INLINE Bool_t | IsOnHeap () const |
virtual Bool_t | IsSortable () const |
R__ALWAYS_INLINE Bool_t | IsZombie () const |
virtual void | ls (Option_t *option="") const |
The ls function lists the contents of a class on stdout. More... | |
void | MayNotUse (const char *method) const |
Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More... | |
virtual Bool_t | Notify () |
This method must be overridden to handle object notification. More... | |
void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
Use this method to declare a method obsolete. More... | |
void | operator delete (void *ptr) |
Operator delete. More... | |
void | operator delete[] (void *ptr) |
Operator delete []. More... | |
void * | operator new (size_t sz) |
void * | operator new (size_t sz, void *vp) |
void * | operator new[] (size_t sz) |
void * | operator new[] (size_t sz, void *vp) |
TObject & | operator= (const TObject &rhs) |
TObject assignment operator. More... | |
virtual void | Paint (Option_t *option="") |
This method must be overridden if a class wants to paint itself. More... | |
virtual void | Pop () |
Pop on object drawn in a pad to the top of the display list. More... | |
virtual void | Print (Option_t *option="") const |
This method must be overridden when a class wants to print itself. More... | |
virtual Int_t | Read (const char *name) |
Read contents of object with specified name from the current directory. More... | |
virtual void | RecursiveRemove (TObject *obj) |
Recursively remove this object from a list. More... | |
void | ResetBit (UInt_t f) |
virtual void | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. More... | |
virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
Save a primitive as a C++ statement(s) on output stream "out". More... | |
void | SetBit (UInt_t f) |
void | SetBit (UInt_t f, Bool_t set) |
Set or unset the user status bits as specified in f. More... | |
virtual void | SetDrawOption (Option_t *option="") |
Set drawing option for object. More... | |
virtual void | SetUniqueID (UInt_t uid) |
Set the unique object id. More... | |
virtual void | SysError (const char *method, const char *msgfmt,...) const |
Issue system error message. More... | |
R__ALWAYS_INLINE Bool_t | TestBit (UInt_t f) const |
Int_t | TestBits (UInt_t f) const |
virtual void | UseCurrentStyle () |
Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More... | |
virtual void | Warning (const char *method, const char *msgfmt,...) const |
Issue warning message. More... | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) |
Write this object to the current directory. More... | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const |
Write this object to the current directory. More... | |
Protected Member Functions | |
UInt_t | MapFlag (Option_t *flag) |
allowed options: More... | |
Int_t | MapOptions (const Int_t *kind) |
transfers the r2r_kind parameters to fftw type More... | |
Protected Member Functions inherited from TObject | |
virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). More... | |
void | MakeZombie () |
Protected Attributes | |
TString | fFlags |
void * | fIn |
void * | fKind |
Int_t * | fN |
Int_t | fNdim |
void * | fOut |
void * | fPlan |
Int_t | fTotalSize |
Additional Inherited Members | |
Public Types inherited from TObject | |
enum | { kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff } |
enum | { kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) } |
enum | EDeprecatedStatusBits { kObjInCanvas = BIT(3) } |
enum | EStatusBits { kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) , kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13) } |
Static Public Member Functions inherited from TVirtualFFT | |
static TVirtualFFT * | FFT (Int_t ndim, Int_t *n, Option_t *option) |
Returns a pointer to the FFT of requested size and type. More... | |
static TVirtualFFT * | GetCurrentTransform () |
static: return current fgFFT More... | |
static const char * | GetDefaultFFT () |
static: return the name of the default fft More... | |
static void | SetDefaultFFT (const char *name="") |
static: set name of default fft More... | |
static void | SetTransform (TVirtualFFT *fft) |
static: set the current transfrom to parameter More... | |
static TVirtualFFT * | SineCosine (Int_t ndim, Int_t *n, Int_t *r2rkind, Option_t *option) |
Returns a pointer to a sine or cosine transform of requested size and kind. More... | |
Static Public Member Functions inherited from TObject | |
static Long_t | GetDtorOnly () |
Return destructor only flag. More... | |
static Bool_t | GetObjectStat () |
Get status of object stat flag. More... | |
static void | SetDtorOnly (void *obj) |
Set destructor only flag. More... | |
static void | SetObjectStat (Bool_t stat) |
Turn on/off tracking of objects in the TObjectTable. More... | |
Static Protected Attributes inherited from TVirtualFFT | |
static TString | fgDefault = "" |
static TVirtualFFT * | fgFFT = 0 |
#include <TFFTReal.h>
TFFTReal::TFFTReal | ( | ) |
default
Definition at line 69 of file TFFTReal.cxx.
For 1d transforms n here is the physical size of the transform (see FFTW manual for more details)
Definition at line 84 of file TFFTReal.cxx.
For multidimensional transforms 1st parameter is the # of dimensions, 2nd is the sizes (physical) of the transform in each dimension.
Definition at line 103 of file TFFTReal.cxx.
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clean-up
Definition at line 124 of file TFFTReal.cxx.
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Implements TVirtualFFT.
Definition at line 43 of file TFFTReal.h.
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Implements TVirtualFFT.
Definition at line 44 of file TFFTReal.h.
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Only for input of HC2R and output of R2HC and for 1d.
Implements TVirtualFFT.
Definition at line 282 of file TFFTReal.cxx.
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Only for input of HC2R and output of R2HC.
Implements TVirtualFFT.
Definition at line 262 of file TFFTReal.cxx.
For multidim.transforms. Returns point #ipoint.
Implements TVirtualFFT.
Definition at line 249 of file TFFTReal.cxx.
For 1d tranforms. Returns point #ipoint.
Implements TVirtualFFT.
Definition at line 236 of file TFFTReal.cxx.
Copies the output (or input) points into the provided array, that should be big enough.
Implements TVirtualFFT.
Definition at line 226 of file TFFTReal.cxx.
Implements TVirtualFFT.
Definition at line 59 of file TFFTReal.h.
Implements TVirtualFFT.
Definition at line 58 of file TFFTReal.h.
Returns the output (or input) array we have 4 different cases:
Implements TVirtualFFT.
Definition at line 296 of file TFFTReal.cxx.
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inlinevirtual |
Implements TVirtualFFT.
Definition at line 46 of file TFFTReal.h.
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inlinevirtual |
Definition at line 42 of file TFFTReal.h.
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inlinevirtual |
Implements TVirtualFFT.
Definition at line 47 of file TFFTReal.h.
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virtual |
Returns the type of the transform.
Implements TVirtualFFT.
Definition at line 210 of file TFFTReal.cxx.
Creates the fftw-plan.
NOTE: input and output arrays are overwritten during initialisation, so don't set any points, before running this function!!!!!
Possible flag_options:
"EX" (from "exhaustive") - the most optimal way is found
This option should be chosen depending on how many transforms of the same size and type are going to be done. Planning is only done once, for the first transform of this size and type.
is dummy and doesn't need to be specified
transform kind for each dimension 4 different kinds of sine and cosine transforms are available
Implements TVirtualFFT.
Definition at line 176 of file TFFTReal.cxx.
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inlinevirtual |
Implements TVirtualFFT.
Definition at line 48 of file TFFTReal.h.
allowed options:
Definition at line 403 of file TFFTReal.cxx.
transfers the r2r_kind parameters to fftw type
Definition at line 357 of file TFFTReal.cxx.
Since multidimensional R2HC and HC2R transforms are not supported, third parameter is dummy.
Implements TVirtualFFT.
Definition at line 333 of file TFFTReal.cxx.
Implements TVirtualFFT.
Definition at line 311 of file TFFTReal.cxx.
Implements TVirtualFFT.
Definition at line 64 of file TFFTReal.h.
Implements TVirtualFFT.
Definition at line 65 of file TFFTReal.h.
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virtual |
Computes the transform, specified in Init() function.
Implements TVirtualFFT.
Definition at line 197 of file TFFTReal.cxx.
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protected |
Definition at line 29 of file TFFTReal.h.
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protected |
Definition at line 22 of file TFFTReal.h.
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protected |
Definition at line 28 of file TFFTReal.h.
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protected |
Definition at line 27 of file TFFTReal.h.
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protected |
Definition at line 25 of file TFFTReal.h.
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protected |
Definition at line 23 of file TFFTReal.h.
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protected |
Definition at line 24 of file TFFTReal.h.
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protected |
Definition at line 26 of file TFFTReal.h.