//------------------------------------------------------------------------------
// Pd Spectral Toolkit
//
// winifft~.c
//
// Performs a real fft then applies a window function
//
// Created by Cooper Baker on 7/16/12.
// Updated for 64 Bit Support in September 2019.
// Copyright (C) 2019 Cooper Baker. All Rights Reserved.
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// headers
//------------------------------------------------------------------------------
// main header for pd
#include "m_pd.h"
// utility header for Pd Spectral Toolkit project
#include "utility.h"
// c standard library used for realloc and free
#include <stdlib.h>
// c standard library used for memset and memcpy
#include <string.h>
// disable compiler warnings on windows
#ifdef NT
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
//------------------------------------------------------------------------------
// winifft_class - pointer to this object's definition
//------------------------------------------------------------------------------
static t_class* winifft_class;
//------------------------------------------------------------------------------
// winifft - data structure holding this object's data
//------------------------------------------------------------------------------
typedef struct winifft
{
// this object - must always be first variable in struct
t_object object;
// needed for CLASS_MAINSIGNALIN macro call in winifft_tilde_setup
t_float inlet_1;
// needed for signalinlet_new call
t_float inlet_2;
// pointer to array for in-place fft calculation
t_float* rifft_array;
// signal vector memory size
t_int memory_size;
// pointer to array containing window function
t_garray* window_array;
// name of window array associated with this object
t_symbol* window_array_name;
// pointer to data within window array
t_word* window_array_data;
// number of data elements in the window array
int window_array_size;
// reciprocal of ifft size for normalization
t_float size_recip;
} t_winifft;
//------------------------------------------------------------------------------
// function prototypes
//------------------------------------------------------------------------------
static t_int* winifft_perform ( t_int* io );
static void winifft_dsp ( t_winifft* object, t_signal **sig );
static void winifft_set_window_array( t_winifft* object );
static void winifft_set ( t_winifft* object, t_symbol* symbol );
static void* winifft_new ( t_symbol* selector, t_int items, t_atom* list );
static void winifft_free ( t_winifft* object );
void winifft_tilde_setup ( void );
//------------------------------------------------------------------------------
// winifft_perform - the signal processing function of this object
//------------------------------------------------------------------------------
static t_int* winifft_perform( t_int* io )
{
// store variables from dsp input/output array
t_float* in1 = ( t_float* )( io[ 1 ] );
t_float* in2 = ( t_float* )( io[ 2 ] );
t_float* out = ( t_float* )( io[ 3 ] );
t_int frames = ( t_int )( io[ 4 ] );
t_winifft* object = ( t_winifft* )( io[ 5 ] );
// store values from object's data structure
t_float* rifft_array = object->rifft_array;
t_word* window_array = object->window_array_data;
t_int window_size = object->window_array_size;
t_int memory_size = object->memory_size;
t_float size_recip = object->size_recip;
// signal vector iterator variable
t_int n = -1;
// clear last dsp loop's data from the rifft_array
memset( rifft_array, 0, memory_size );
// pack real and imaginary data into rifft_array
MayerRealIFFTPack( rifft_array, in1, in2, frames );
// perform the real inverse fft
mayer_realifft( ( int )frames, rifft_array );
// make sure window array exists and can be used
if( ( window_array != NULL ) && ( window_size == frames ) )
{
// window and normalize rifft_array into out array
while( ++n < frames )
{
out[ n ] = rifft_array[ n ] * window_array[ n ].w_float * size_recip;
}
}
else
{
// normalize rifft array into out array
while( ++n < frames )
{
out[ n ] = rifft_array[ n ] * size_recip;
}
}
// return the dsp input/output array address plus one more than its size
// to provide a pointer to the next perform function in pd's call list
return &( io[ 6 ] );
}
//------------------------------------------------------------------------------
// winifft_dsp - installs this object's dsp function in pd's callback list
//------------------------------------------------------------------------------
static void winifft_dsp( t_winifft* object, t_signal **sig )
{
// make sure the block size is large enough
if( sig[ 0 ]->s_n < 4 )
{
pd_error( object, "winifft: minimum 4 points" );
return;
}
// calculate memory size for realloc and memset
t_int memory_size = sig[ 0 ]->s_n * sizeof( t_float );
// allocate enough memory to hold signal vector data
object->rifft_array = realloc( object->rifft_array, memory_size );
// save memory size for use in dsp loop
object->memory_size = memory_size;
// reciprocal of ifft size for normalization
object->size_recip = 1.0 / sig[ 0 ]->s_n;
// set the window array associated with this object
winifft_set_window_array( object );
// dsp_add arguments
//--------------------------------------------------------------------------
// perform routine
// number of passed parameters
// inlet 1 sample vector
// inlet 2 sample vector
// outlet sample vector
// sample frames to process (vector size)
// pointer to this object
dsp_add( winifft_perform, 5, sig[ 0 ]->s_vec, sig[ 1 ]->s_vec, sig[ 2 ]->s_vec, sig[ 0 ]->s_n, object );
}
//------------------------------------------------------------------------------
// winifft_set_window_array - associates a window array with this object
//------------------------------------------------------------------------------
static void winifft_set_window_array( t_winifft* object )
{
// array error checking flag
t_int valid_array;
// set array data pointer to null for detection by perform function
// in case the array is invalid and cannot be used
object->window_array_data = NULL;
// check to make sure this object has an array name to work with
//--------------------------------------------------------------------------
if( object->window_array_name == NULL )
{
pd_error( object, "winifft~: no array name set" );
return;
}
// check to make sure the array exists
//--------------------------------------------------------------------------
object->window_array = ( t_garray* )pd_findbyclass( object->window_array_name, garray_class );
if( object->window_array == NULL )
{
pd_error( object, "winifft~: %s: no such array", object->window_array_name->s_name );
return;
}
// check to make sure the array is valid
//--------------------------------------------------------------------------
valid_array = garray_getfloatwords( object->window_array, &( object->window_array_size), &( object->window_array_data ) );
if( valid_array == 0 )
{
pd_error( object, "winifft~: %s: bad template for winifft~", object->window_array_name->s_name );
return;
}
garray_usedindsp( object->window_array );
}
//------------------------------------------------------------------------------
// winifft_set - sets window array associated with this object
//------------------------------------------------------------------------------
static void winifft_set( t_winifft* object, t_symbol* symbol )
{
object->window_array_name = symbol;
winifft_set_window_array( object );
}
//------------------------------------------------------------------------------
// winifft_new - instantiates a copy of this object in pd
//------------------------------------------------------------------------------
static void* winifft_new( t_symbol* selector, t_int items, t_atom* list )
{
// create a pointer to this object
t_winifft* object = ( t_winifft* )pd_new( winifft_class );
// create a second signal inlet
signalinlet_new( &object->object, object->inlet_2 );
// create a signal outlet for this object
outlet_new( &object->object, gensym( "signal" ) );
// initialize variables
object->rifft_array = NULL;
object->window_array = NULL;
object->window_array_name = NULL;
object->window_array_data = NULL;
object->window_array_size = 0;
// parse initialization arguments
//--------------------------------------------------------------------------
if( items > 0 )
{
if( list[ 0 ].a_type == A_SYMBOL )
{
object->window_array_name = list[ 0 ].a_w.w_symbol;
}
else
{
pd_error( object, "winifft~: invalid argument type" );
}
}
if( items > 1 )
{
pd_error( object, "winifft~: extra arguments ignored" );
}
return object;
}
//------------------------------------------------------------------------------
// winifft_free - cleans up memory allocated by this object
//------------------------------------------------------------------------------
static void winifft_free( t_winifft* object )
{
// if memory is allocated
if( object->rifft_array )
{
// deallocate the memory
free( object->rifft_array );
// set the memory pointer to null
object->rifft_array = NULL;
}
}
//------------------------------------------------------------------------------
// winifft_tilde_setup - describes the attributes of this object to pd so it may be properly instantiated
// (must always be named with _tilde replacing ~ in the object name)
//------------------------------------------------------------------------------
void winifft_tilde_setup( void )
{
// creates an instance of this object and describes it to pd
winifft_class = class_new( gensym( "winifft~" ), ( t_newmethod )winifft_new, ( t_method )winifft_free, sizeof( t_winifft ), 0, A_GIMME, 0 );
// declares leftmost inlet as a signal inlet
CLASS_MAINSIGNALIN( winifft_class, t_winifft, inlet_1 );
// installs winifft_dsp so that it will be called when dsp is turned on
class_addmethod( winifft_class, ( t_method )winifft_dsp, gensym( "dsp" ), 0 );
// installs winifft_set to respond to "set ___" messages
class_addmethod( winifft_class, ( t_method )winifft_set, gensym( "set" ), A_SYMBOL, 0 );
}
//------------------------------------------------------------------------------
// EOF
//------------------------------------------------------------------------------
// Pd Spectral Toolkit
//
// winifft~.c
//
// Performs a real fft then applies a window function
//
// Created by Cooper Baker on 7/16/12.
// Updated for 64 Bit Support in September 2019.
// Copyright (C) 2019 Cooper Baker. All Rights Reserved.
//------------------------------------------------------------------------------
//------------------------------------------------------------------------------
// headers
//------------------------------------------------------------------------------
// main header for pd
#include "m_pd.h"
// utility header for Pd Spectral Toolkit project
#include "utility.h"
// c standard library used for realloc and free
#include <stdlib.h>
// c standard library used for memset and memcpy
#include <string.h>
// disable compiler warnings on windows
#ifdef NT
#pragma warning( disable : 4244 )
#pragma warning( disable : 4305 )
#endif
//------------------------------------------------------------------------------
// winifft_class - pointer to this object's definition
//------------------------------------------------------------------------------
static t_class* winifft_class;
//------------------------------------------------------------------------------
// winifft - data structure holding this object's data
//------------------------------------------------------------------------------
typedef struct winifft
{
// this object - must always be first variable in struct
t_object object;
// needed for CLASS_MAINSIGNALIN macro call in winifft_tilde_setup
t_float inlet_1;
// needed for signalinlet_new call
t_float inlet_2;
// pointer to array for in-place fft calculation
t_float* rifft_array;
// signal vector memory size
t_int memory_size;
// pointer to array containing window function
t_garray* window_array;
// name of window array associated with this object
t_symbol* window_array_name;
// pointer to data within window array
t_word* window_array_data;
// number of data elements in the window array
int window_array_size;
// reciprocal of ifft size for normalization
t_float size_recip;
} t_winifft;
//------------------------------------------------------------------------------
// function prototypes
//------------------------------------------------------------------------------
static t_int* winifft_perform ( t_int* io );
static void winifft_dsp ( t_winifft* object, t_signal **sig );
static void winifft_set_window_array( t_winifft* object );
static void winifft_set ( t_winifft* object, t_symbol* symbol );
static void* winifft_new ( t_symbol* selector, t_int items, t_atom* list );
static void winifft_free ( t_winifft* object );
void winifft_tilde_setup ( void );
//------------------------------------------------------------------------------
// winifft_perform - the signal processing function of this object
//------------------------------------------------------------------------------
static t_int* winifft_perform( t_int* io )
{
// store variables from dsp input/output array
t_float* in1 = ( t_float* )( io[ 1 ] );
t_float* in2 = ( t_float* )( io[ 2 ] );
t_float* out = ( t_float* )( io[ 3 ] );
t_int frames = ( t_int )( io[ 4 ] );
t_winifft* object = ( t_winifft* )( io[ 5 ] );
// store values from object's data structure
t_float* rifft_array = object->rifft_array;
t_word* window_array = object->window_array_data;
t_int window_size = object->window_array_size;
t_int memory_size = object->memory_size;
t_float size_recip = object->size_recip;
// signal vector iterator variable
t_int n = -1;
// clear last dsp loop's data from the rifft_array
memset( rifft_array, 0, memory_size );
// pack real and imaginary data into rifft_array
MayerRealIFFTPack( rifft_array, in1, in2, frames );
// perform the real inverse fft
mayer_realifft( ( int )frames, rifft_array );
// make sure window array exists and can be used
if( ( window_array != NULL ) && ( window_size == frames ) )
{
// window and normalize rifft_array into out array
while( ++n < frames )
{
out[ n ] = rifft_array[ n ] * window_array[ n ].w_float * size_recip;
}
}
else
{
// normalize rifft array into out array
while( ++n < frames )
{
out[ n ] = rifft_array[ n ] * size_recip;
}
}
// return the dsp input/output array address plus one more than its size
// to provide a pointer to the next perform function in pd's call list
return &( io[ 6 ] );
}
//------------------------------------------------------------------------------
// winifft_dsp - installs this object's dsp function in pd's callback list
//------------------------------------------------------------------------------
static void winifft_dsp( t_winifft* object, t_signal **sig )
{
// make sure the block size is large enough
if( sig[ 0 ]->s_n < 4 )
{
pd_error( object, "winifft: minimum 4 points" );
return;
}
// calculate memory size for realloc and memset
t_int memory_size = sig[ 0 ]->s_n * sizeof( t_float );
// allocate enough memory to hold signal vector data
object->rifft_array = realloc( object->rifft_array, memory_size );
// save memory size for use in dsp loop
object->memory_size = memory_size;
// reciprocal of ifft size for normalization
object->size_recip = 1.0 / sig[ 0 ]->s_n;
// set the window array associated with this object
winifft_set_window_array( object );
// dsp_add arguments
//--------------------------------------------------------------------------
// perform routine
// number of passed parameters
// inlet 1 sample vector
// inlet 2 sample vector
// outlet sample vector
// sample frames to process (vector size)
// pointer to this object
dsp_add( winifft_perform, 5, sig[ 0 ]->s_vec, sig[ 1 ]->s_vec, sig[ 2 ]->s_vec, sig[ 0 ]->s_n, object );
}
//------------------------------------------------------------------------------
// winifft_set_window_array - associates a window array with this object
//------------------------------------------------------------------------------
static void winifft_set_window_array( t_winifft* object )
{
// array error checking flag
t_int valid_array;
// set array data pointer to null for detection by perform function
// in case the array is invalid and cannot be used
object->window_array_data = NULL;
// check to make sure this object has an array name to work with
//--------------------------------------------------------------------------
if( object->window_array_name == NULL )
{
pd_error( object, "winifft~: no array name set" );
return;
}
// check to make sure the array exists
//--------------------------------------------------------------------------
object->window_array = ( t_garray* )pd_findbyclass( object->window_array_name, garray_class );
if( object->window_array == NULL )
{
pd_error( object, "winifft~: %s: no such array", object->window_array_name->s_name );
return;
}
// check to make sure the array is valid
//--------------------------------------------------------------------------
valid_array = garray_getfloatwords( object->window_array, &( object->window_array_size), &( object->window_array_data ) );
if( valid_array == 0 )
{
pd_error( object, "winifft~: %s: bad template for winifft~", object->window_array_name->s_name );
return;
}
garray_usedindsp( object->window_array );
}
//------------------------------------------------------------------------------
// winifft_set - sets window array associated with this object
//------------------------------------------------------------------------------
static void winifft_set( t_winifft* object, t_symbol* symbol )
{
object->window_array_name = symbol;
winifft_set_window_array( object );
}
//------------------------------------------------------------------------------
// winifft_new - instantiates a copy of this object in pd
//------------------------------------------------------------------------------
static void* winifft_new( t_symbol* selector, t_int items, t_atom* list )
{
// create a pointer to this object
t_winifft* object = ( t_winifft* )pd_new( winifft_class );
// create a second signal inlet
signalinlet_new( &object->object, object->inlet_2 );
// create a signal outlet for this object
outlet_new( &object->object, gensym( "signal" ) );
// initialize variables
object->rifft_array = NULL;
object->window_array = NULL;
object->window_array_name = NULL;
object->window_array_data = NULL;
object->window_array_size = 0;
// parse initialization arguments
//--------------------------------------------------------------------------
if( items > 0 )
{
if( list[ 0 ].a_type == A_SYMBOL )
{
object->window_array_name = list[ 0 ].a_w.w_symbol;
}
else
{
pd_error( object, "winifft~: invalid argument type" );
}
}
if( items > 1 )
{
pd_error( object, "winifft~: extra arguments ignored" );
}
return object;
}
//------------------------------------------------------------------------------
// winifft_free - cleans up memory allocated by this object
//------------------------------------------------------------------------------
static void winifft_free( t_winifft* object )
{
// if memory is allocated
if( object->rifft_array )
{
// deallocate the memory
free( object->rifft_array );
// set the memory pointer to null
object->rifft_array = NULL;
}
}
//------------------------------------------------------------------------------
// winifft_tilde_setup - describes the attributes of this object to pd so it may be properly instantiated
// (must always be named with _tilde replacing ~ in the object name)
//------------------------------------------------------------------------------
void winifft_tilde_setup( void )
{
// creates an instance of this object and describes it to pd
winifft_class = class_new( gensym( "winifft~" ), ( t_newmethod )winifft_new, ( t_method )winifft_free, sizeof( t_winifft ), 0, A_GIMME, 0 );
// declares leftmost inlet as a signal inlet
CLASS_MAINSIGNALIN( winifft_class, t_winifft, inlet_1 );
// installs winifft_dsp so that it will be called when dsp is turned on
class_addmethod( winifft_class, ( t_method )winifft_dsp, gensym( "dsp" ), 0 );
// installs winifft_set to respond to "set ___" messages
class_addmethod( winifft_class, ( t_method )winifft_set, gensym( "set" ), A_SYMBOL, 0 );
}
//------------------------------------------------------------------------------
// EOF
//------------------------------------------------------------------------------