//------------------------------------------------------------------------------
// Pd Spectral Toolkit
//
// winfft.c
//
// Applies a window function then performs a real fft
//
// Created by Cooper Baker on 7/12/12.
// 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
//------------------------------------------------------------------------------
// winfft_class - pointer to this object's definition
//------------------------------------------------------------------------------
static t_class* winfft_class;
//------------------------------------------------------------------------------
// winfft - data structure holding this object's data
//------------------------------------------------------------------------------
typedef struct winfft
{
// this object - must always be first variable in struct
t_object object;
// needed for CLASS_MAINSIGNALIN macro call in winfft_tilde_setup
t_float inlet_1;
// pointer to array for in-place fft calculation
t_float* rfft_array;
// pointer to array containing real values
t_float* real_array;
// pointer to array containing imaginary values
t_float* imag_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;
} t_winfft;
//------------------------------------------------------------------------------
// function prototypes
//------------------------------------------------------------------------------
static t_int* winfft_perform ( t_int* io );
static void winfft_dsp ( t_winfft* object, t_signal **sig );
static void winfft_set_window_array( t_winfft* object );
static void winfft_set ( t_winfft* object, t_symbol* symbol );
static void* winfft_new ( t_symbol* selector, t_int items, t_atom* list );
static void winfft_free ( t_winfft* object );
void winfft_tilde_setup ( void );
//------------------------------------------------------------------------------
// winfft_perform - the signal processing function of this object
//------------------------------------------------------------------------------
static t_int* winfft_perform( t_int* io )
{
// store variables from dsp input/output array
t_float* in = ( t_float* )( io[ 1 ] );
t_float* out1 = ( t_float* )( io[ 2 ] );
t_float* out2 = ( t_float* )( io[ 3 ] );
t_int frames = ( t_int )( io[ 4 ] );
t_winfft* object = ( t_winfft* )( io[ 5 ] );
// store values from object's data structure
t_float* rfft_array = object->rfft_array;
t_float* real_array = object->real_array;
t_float* imag_array = object->imag_array;
t_word* window_array = object->window_array_data;
t_int window_size = object->window_array_size;
t_int memory_size = object->memory_size;
// signal vector iterator variable
t_int n = -1;
// make sure window array exists and can be used
if( ( window_array != NULL ) && ( window_size == frames ) )
{
// window input into rfft_array
while( ++n < frames )
{
rfft_array[ n ] = in[ n ] * window_array[ n ].w_float;
}
}
else
{
// copy input directly into rfft_array
memcpy( rfft_array, in, memory_size );
}
// do the real fft
mayer_realfft( ( int )frames, rfft_array );
// copy fft data into real and imaginary arrays
MayerRealFFTUnpack( rfft_array, real_array, imag_array, frames );
// copy data to outlets
memcpy( out1, real_array, memory_size );
memcpy( out2, imag_array, memory_size );
// 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 ] );
}
//------------------------------------------------------------------------------
// winfft_dsp - installs this object's dsp function in pd's callback list
//------------------------------------------------------------------------------
static void winfft_dsp( t_winfft* object, t_signal **sig )
{
// make sure the block size is large enough
if( sig[ 0 ]->s_n < 4 )
{
pd_error( object, "winfft: 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->rfft_array = realloc( object->rfft_array, memory_size );
object->real_array = realloc( object->real_array, memory_size );
object->imag_array = realloc( object->imag_array, memory_size );
// set real and imaginary memory to zero
memset( object->real_array, 0, memory_size );
memset( object->imag_array, 0, memory_size );
// save memory size for use in dsp loop
object->memory_size = memory_size;
// set the window array associated with this object
winfft_set_window_array( object );
// dsp_add arguments
//--------------------------------------------------------------------------
// perform routine
// number of passed parameters
// inlet sample vector
// outlet 1 sample vector
// outlet 2 sample vector
// sample frames to process (vector size)
// pointer to this object
dsp_add( winfft_perform, 5, sig[ 0 ]->s_vec, sig[ 1 ]->s_vec, sig[ 2 ]->s_vec, sig[ 0 ]->s_n, object );
}
//------------------------------------------------------------------------------
// winfft_set_window_array - associates a window array with this object
//------------------------------------------------------------------------------
static void winfft_set_window_array( t_winfft* 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, "winfft~: 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, "winfft~: %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, "winfft~: %s: bad template for winfft~", object->window_array_name->s_name );
return;
}
garray_usedindsp( object->window_array );
}
//------------------------------------------------------------------------------
// winfft_set - sets window array associated with this object
//------------------------------------------------------------------------------
static void winfft_set( t_winfft* object, t_symbol* symbol )
{
object->window_array_name = symbol;
winfft_set_window_array( object );
}
//------------------------------------------------------------------------------
// winfft_new - instantiates a copy of this object in pd
//------------------------------------------------------------------------------
static void* winfft_new( t_symbol* selector, t_int items, t_atom* list )
{
// create a pointer to this object
t_winfft* object = ( t_winfft* )pd_new( winfft_class );
// create a two new signal outlets for this object
outlet_new( &object->object, gensym( "signal" ) );
outlet_new( &object->object, gensym( "signal" ) );
// initialize variables
object->rfft_array = NULL;
object->real_array = NULL;
object->imag_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, "winfft~: invalid argument type" );
}
}
if( items > 1 )
{
pd_error( object, "winfft~: extra arguments ignored" );
}
return object;
}
//------------------------------------------------------------------------------
// winfft_free - cleans up memory allocated by this object
//------------------------------------------------------------------------------
static void winfft_free( t_winfft* object )
{
// if memory is allocated
if( object->rfft_array )
{
// deallocate the memory
free( object->rfft_array );
// set the memory pointer to null
object->rfft_array = NULL;
}
//. . .
if( object->real_array )
{
free( object->real_array );
object->real_array = NULL;
}
if( object->imag_array )
{
free( object->imag_array );
object->imag_array = NULL;
}
}
//------------------------------------------------------------------------------
// winfft_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 winfft_tilde_setup( void )
{
// creates an instance of this object and describes it to pd
winfft_class = class_new( gensym( "winfft~" ), ( t_newmethod )winfft_new, ( t_method )winfft_free, sizeof( t_winfft ), 0, A_GIMME, 0 );
// declares leftmost inlet as a signal inlet
CLASS_MAINSIGNALIN( winfft_class, t_winfft, inlet_1 );
// installs winfft_dsp so that it will be called when dsp is turned on
class_addmethod( winfft_class, ( t_method )winfft_dsp, gensym( "dsp" ), 0 );
// installs winfft_set to respond to "set ___" messages
class_addmethod( winfft_class, ( t_method )winfft_set, gensym( "set" ), A_SYMBOL, 0 );
}
//------------------------------------------------------------------------------
// EOF
//------------------------------------------------------------------------------
// Pd Spectral Toolkit
//
// winfft.c
//
// Applies a window function then performs a real fft
//
// Created by Cooper Baker on 7/12/12.
// 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
//------------------------------------------------------------------------------
// winfft_class - pointer to this object's definition
//------------------------------------------------------------------------------
static t_class* winfft_class;
//------------------------------------------------------------------------------
// winfft - data structure holding this object's data
//------------------------------------------------------------------------------
typedef struct winfft
{
// this object - must always be first variable in struct
t_object object;
// needed for CLASS_MAINSIGNALIN macro call in winfft_tilde_setup
t_float inlet_1;
// pointer to array for in-place fft calculation
t_float* rfft_array;
// pointer to array containing real values
t_float* real_array;
// pointer to array containing imaginary values
t_float* imag_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;
} t_winfft;
//------------------------------------------------------------------------------
// function prototypes
//------------------------------------------------------------------------------
static t_int* winfft_perform ( t_int* io );
static void winfft_dsp ( t_winfft* object, t_signal **sig );
static void winfft_set_window_array( t_winfft* object );
static void winfft_set ( t_winfft* object, t_symbol* symbol );
static void* winfft_new ( t_symbol* selector, t_int items, t_atom* list );
static void winfft_free ( t_winfft* object );
void winfft_tilde_setup ( void );
//------------------------------------------------------------------------------
// winfft_perform - the signal processing function of this object
//------------------------------------------------------------------------------
static t_int* winfft_perform( t_int* io )
{
// store variables from dsp input/output array
t_float* in = ( t_float* )( io[ 1 ] );
t_float* out1 = ( t_float* )( io[ 2 ] );
t_float* out2 = ( t_float* )( io[ 3 ] );
t_int frames = ( t_int )( io[ 4 ] );
t_winfft* object = ( t_winfft* )( io[ 5 ] );
// store values from object's data structure
t_float* rfft_array = object->rfft_array;
t_float* real_array = object->real_array;
t_float* imag_array = object->imag_array;
t_word* window_array = object->window_array_data;
t_int window_size = object->window_array_size;
t_int memory_size = object->memory_size;
// signal vector iterator variable
t_int n = -1;
// make sure window array exists and can be used
if( ( window_array != NULL ) && ( window_size == frames ) )
{
// window input into rfft_array
while( ++n < frames )
{
rfft_array[ n ] = in[ n ] * window_array[ n ].w_float;
}
}
else
{
// copy input directly into rfft_array
memcpy( rfft_array, in, memory_size );
}
// do the real fft
mayer_realfft( ( int )frames, rfft_array );
// copy fft data into real and imaginary arrays
MayerRealFFTUnpack( rfft_array, real_array, imag_array, frames );
// copy data to outlets
memcpy( out1, real_array, memory_size );
memcpy( out2, imag_array, memory_size );
// 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 ] );
}
//------------------------------------------------------------------------------
// winfft_dsp - installs this object's dsp function in pd's callback list
//------------------------------------------------------------------------------
static void winfft_dsp( t_winfft* object, t_signal **sig )
{
// make sure the block size is large enough
if( sig[ 0 ]->s_n < 4 )
{
pd_error( object, "winfft: 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->rfft_array = realloc( object->rfft_array, memory_size );
object->real_array = realloc( object->real_array, memory_size );
object->imag_array = realloc( object->imag_array, memory_size );
// set real and imaginary memory to zero
memset( object->real_array, 0, memory_size );
memset( object->imag_array, 0, memory_size );
// save memory size for use in dsp loop
object->memory_size = memory_size;
// set the window array associated with this object
winfft_set_window_array( object );
// dsp_add arguments
//--------------------------------------------------------------------------
// perform routine
// number of passed parameters
// inlet sample vector
// outlet 1 sample vector
// outlet 2 sample vector
// sample frames to process (vector size)
// pointer to this object
dsp_add( winfft_perform, 5, sig[ 0 ]->s_vec, sig[ 1 ]->s_vec, sig[ 2 ]->s_vec, sig[ 0 ]->s_n, object );
}
//------------------------------------------------------------------------------
// winfft_set_window_array - associates a window array with this object
//------------------------------------------------------------------------------
static void winfft_set_window_array( t_winfft* 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, "winfft~: 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, "winfft~: %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, "winfft~: %s: bad template for winfft~", object->window_array_name->s_name );
return;
}
garray_usedindsp( object->window_array );
}
//------------------------------------------------------------------------------
// winfft_set - sets window array associated with this object
//------------------------------------------------------------------------------
static void winfft_set( t_winfft* object, t_symbol* symbol )
{
object->window_array_name = symbol;
winfft_set_window_array( object );
}
//------------------------------------------------------------------------------
// winfft_new - instantiates a copy of this object in pd
//------------------------------------------------------------------------------
static void* winfft_new( t_symbol* selector, t_int items, t_atom* list )
{
// create a pointer to this object
t_winfft* object = ( t_winfft* )pd_new( winfft_class );
// create a two new signal outlets for this object
outlet_new( &object->object, gensym( "signal" ) );
outlet_new( &object->object, gensym( "signal" ) );
// initialize variables
object->rfft_array = NULL;
object->real_array = NULL;
object->imag_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, "winfft~: invalid argument type" );
}
}
if( items > 1 )
{
pd_error( object, "winfft~: extra arguments ignored" );
}
return object;
}
//------------------------------------------------------------------------------
// winfft_free - cleans up memory allocated by this object
//------------------------------------------------------------------------------
static void winfft_free( t_winfft* object )
{
// if memory is allocated
if( object->rfft_array )
{
// deallocate the memory
free( object->rfft_array );
// set the memory pointer to null
object->rfft_array = NULL;
}
//. . .
if( object->real_array )
{
free( object->real_array );
object->real_array = NULL;
}
if( object->imag_array )
{
free( object->imag_array );
object->imag_array = NULL;
}
}
//------------------------------------------------------------------------------
// winfft_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 winfft_tilde_setup( void )
{
// creates an instance of this object and describes it to pd
winfft_class = class_new( gensym( "winfft~" ), ( t_newmethod )winfft_new, ( t_method )winfft_free, sizeof( t_winfft ), 0, A_GIMME, 0 );
// declares leftmost inlet as a signal inlet
CLASS_MAINSIGNALIN( winfft_class, t_winfft, inlet_1 );
// installs winfft_dsp so that it will be called when dsp is turned on
class_addmethod( winfft_class, ( t_method )winfft_dsp, gensym( "dsp" ), 0 );
// installs winfft_set to respond to "set ___" messages
class_addmethod( winfft_class, ( t_method )winfft_set, gensym( "set" ), A_SYMBOL, 0 );
}
//------------------------------------------------------------------------------
// EOF
//------------------------------------------------------------------------------