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gwaon-wav.c
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gwaon-wav.c
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/* gWaoN -- gtk+ Spectra Analyzer : wav win
* Copyright (C) 2007-2013 Kengo Ichiki <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <stdio.h> /* for check */
#include <stdlib.h> /* free() */
#include <string.h> // strcpy()
#include <math.h> // log()
// libsndfile
#include <sndfile.h>
#include "snd.h" // sndfile_read_at()
// FFTW library
#include <fftw3.h>
#include "hc.h"
#include "fft.h" // hanning()
#include "midi.h" // midi_to_freq(), etc.
#include "gwaon-play.h" // play_1msec()
// ao device
#include <ao/ao.h>
#include "ao-wrapper.h"
#include "pv-complex.h" // struct pv_complex
#include "gtk-color.h" /* get_color() */
#include "memory-check.h" // CHECK_MALLOC() macro
// global variables
gint WIN_wav_width;
gint WIN_wav_height;
int WIN_wav_cur;
int WIN_wav_scale;
int WIN_wav_mark;
GdkPixmap *wav_pixmap = NULL;
GtkObject *adj_cur;
GtkObject *adj_scale;
GdkPixbuf *wav_pixbuf = NULL;
int WIN_spec_n;
int WIN_spec_hop_scale;
int WIN_spec_hop;
int WIN_spec_mode;
double *spec_in = NULL;
double *spec_out = NULL;
double *spec_left = NULL;
double *spec_right = NULL;
fftw_plan plan;
int flag_window;
double amp2_min, amp2_max;
int oct_min, oct_max;
double logf_min, logf_max;
gint colormap_power_r[256];
gint colormap_power_g[256];
gint colormap_power_b[256];
// experimental
double octave_removal_factor = 0.0;
/* draw wave panel
* INPUT
* i0, i1 : the range to draw in the display (pixel)
*/
static void
draw_wav_frame (GtkWidget *widget,
GdkGC *gc,
int bottom_wav, int height_wav,
int i0, int i1)
{
extern GdkPixmap *wav_pixmap;
int i, j, k;
// clear image first
get_color (widget, 0, 0, 0, gc);
gdk_draw_rectangle (wav_pixmap, gc, TRUE /* fill */,
i0, bottom_wav - height_wav,
i1, height_wav);
// backup GdkFunction
GdkGCValues backup_gc_values;
gdk_gc_get_values (gc, &backup_gc_values);
// set GC wiht XOR function
gdk_gc_set_function (gc, GDK_XOR);
// clear image first
get_color (widget, 0, 0, 0, gc);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
i0, bottom_wav - height_wav,
i1, height_wav);
// center lines
get_color (widget, 0, 0, 128, gc); // blue
gdk_draw_line (wav_pixmap, gc,
i0, bottom_wav - height_wav/2,
i1, bottom_wav - height_wav/2);
extern int WIN_wav_cur;
extern SNDFILE *sf;
extern SF_INFO sfinfo;
// the following is the dynamic
if (sf != NULL)
{
int len = 10000;
double *left = (double *)malloc (sizeof (double) * len);
double *right = (double *)malloc (sizeof (double) * len);
CHECK_MALLOC (left, "draw_wav_frame");
CHECK_MALLOC (right, "draw_wav_frame");
int cur_read = WIN_wav_cur + i0 * WIN_wav_scale;
for (i = 0; i < len; i ++)
{
left [i] = right [i] = 0.0;
}
sndfile_read_at (sf, sfinfo, cur_read, left, right, len);
int iarray = 0;
int iy;
int iy_t_l, iy_t_l0 = 0;
int iy_b_l, iy_b_l0 = 0;
int iy_t_r, iy_t_r0 = 0;
int iy_b_r, iy_b_r0 = 0;
for (i = i0; i < i1; i ++)
{
// left channel
// vertical axis is directing down on the window
iy = bottom_wav
- (int)((double)height_wav * (left [iarray] + 1.0) / 2.0);
iy_t_l = iy_b_l = iy;
// right channel
// vertical axis is directing down on the window
iy = bottom_wav
- (int)((double)height_wav * (right [iarray] + 1.0) / 2.0);
iy_t_r = iy_b_r = iy;
iarray++;
if (iarray >= len)
{
// read next frame
cur_read += iarray;
for (k = 0; k < len; k ++) left [k] = right [k] = 0.0;
sndfile_read_at (sf, sfinfo, cur_read, left, right, len);
// reset iarray
iarray = 0;
}
for (j = 1; j < WIN_wav_scale; j ++)
{
// left channel
// vertical axis is directing down on the window
iy = bottom_wav
- (int)((double)height_wav * (left [iarray] + 1.0) / 2.0);
if (iy_t_l < iy) iy_t_l = iy;
if (iy_b_l > iy) iy_b_l = iy;
// right channel
// vertical axis is directing down on the window
iy = bottom_wav
- (int)((double)height_wav * (right [iarray] + 1.0) / 2.0);
if (iy_t_r < iy) iy_t_r = iy;
if (iy_b_r > iy) iy_b_r = iy;
iarray++;
if (iarray >= len)
{
// read next frame
cur_read += iarray;
for (k = 0; k < len; k ++) left [k] = right [k] = 0.0;
sndfile_read_at (sf, sfinfo, cur_read, left, right, len);
// reset iarray
iarray = 0;
}
}
get_color (widget, 255, 0, 0, gc); // red
gdk_draw_line (wav_pixmap, gc, i, iy_b_l, i, iy_t_l);
if (i > 0)
{
gdk_draw_line (wav_pixmap, gc, i-1, iy_t_l0, i, iy_t_l);
gdk_draw_line (wav_pixmap, gc, i-1, iy_b_l0, i, iy_b_l);
}
iy_t_l0 = iy_t_l;
iy_b_l0 = iy_b_l;
get_color (widget, 0, 255, 0, gc); // green
gdk_draw_line (wav_pixmap, gc, i, iy_b_r, i, iy_t_r);
if (i > 0)
{
gdk_draw_line (wav_pixmap, gc, i-1, iy_t_r0, i, iy_t_r);
gdk_draw_line (wav_pixmap, gc, i-1, iy_b_r0, i, iy_b_r);
}
iy_t_r0 = iy_t_r;
iy_b_r0 = iy_b_r;
}
free (left);
free (right);
// recover GC's function
gdk_gc_set_function (gc, backup_gc_values.function);
}
// the following is static contents
}
/*
* OUTPUT (returnd value)
* ix : ranges from 0 to resolution for x = lofg_min to logf_max
*/
static int
logf_to_display (double logf, int resolution)
{
extern double logf_min;
extern double logf_max;
int ix;
ix = (int)((double)resolution * (logf - logf_min) / (logf_max - logf_min));
return (ix);
}
/*
* OUTPUT (returnd value)
* ix : ranges from 0 to resolution for x = logf_min to logf_max
*/
static double
display_to_logf (int ix, int resolution)
{
extern double logf_min;
extern double logf_max;
double logf = logf_min
+ ((double)ix + 0.5) * (logf_max - logf_min) / (double)resolution;
return (logf);
}
/* return the bottom position on the display for the midi note
* OUTPUT (returnd value)
* ix : ranges from 0 to resolution for x = logf_min to logf_max
*/
static int
midi_to_display_bottom (int midi, int res)
{
extern double logf_min;
extern double logf_max;
int ix0 = logf_to_display (midi_to_logf (midi-1), res);
int ix1 = logf_to_display (midi_to_logf (midi), res);
return ((ix1 + ix0) / 2);
}
/* return the top position on the display for the midi note
* OUTPUT (returnd value)
* ix : ranges from 0 to resolution for x = logf_min to logf_max
*/
static int
midi_to_display_top (int midi, int res)
{
return (midi_to_display_bottom (midi+1, res));
}
/* draw vertical keyboard between (bottom - height) to bottom
*/
static void
draw_keyboard (GtkWidget *widget,
GdkGC *gc,
int bottom, int height)
{
extern GdkPixmap *wav_pixmap;
extern int oct_min;
extern int oct_max;
extern double logf_min;
extern double logf_max;
int i, j;
int ix;
double x;
int idx = (int)((double)height / (double)(oct_max - oct_min) / 12.0);
get_color (widget, 255, 255, 255, gc); // white
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, bottom - height,
10, height);
get_color (widget, 0, 0, 0, gc); // black
gdk_draw_line (wav_pixmap, gc,
0, bottom - height,
0, bottom);
gdk_draw_line (wav_pixmap, gc,
10, bottom - height,
10, bottom);
for (i = oct_min; i < oct_max; i ++)
{
// C# (Db)
j = 1;
ix = bottom - midi_to_display_top ((i+1)*12+j, height);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, ix,
6, idx);
// D# (Eb)
j = 3;
ix = bottom - midi_to_display_top ((i+1)*12+j, height);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, ix,
6, idx);
// F# (Gb)
j = 6;
ix = bottom - midi_to_display_top ((i+1)*12+j, height);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, ix,
6, idx);
// G# (Ab)
j = 8;
ix = bottom - midi_to_display_top ((i+1)*12+j, height);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, ix,
6, idx);
// A# (Bb)
j = 10;
ix = bottom - midi_to_display_top ((i+1)*12+j, height);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, ix,
6, idx);
// on the black key of C#
j = 1;
x = midi_to_logf ((i+1)*12+j);
ix = bottom
- (int)((double)height * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
0, ix,
9, ix);
// on the black key of D#
j = 3;
x = midi_to_logf ((i+1)*12+j);
ix = bottom
- (int)((double)height * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
0, ix,
9, ix);
// on the black key of F#
j = 6;
x = midi_to_logf ((i+1)*12+j);
ix = bottom
- (int)((double)height * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
0, ix,
9, ix);
// on the black key of G#
j = 8;
x = midi_to_logf ((i+1)*12+j);
ix = bottom
- (int)((double)height * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
0, ix,
9, ix);
// on the black key of A#
j = 10;
x = midi_to_logf ((i+1)*12+j);
ix = bottom
- (int)((double)height * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
0, ix,
9, ix);
// between E and F
j = 4;
ix = bottom - midi_to_display_top ((i+1)*12+j, height);
gdk_draw_line (wav_pixmap, gc,
0, ix,
9, ix);
// between B and C
j = 11;
ix = bottom - midi_to_display_top ((i+1)*12+j, height);
gdk_draw_line (wav_pixmap, gc,
0, ix,
9, ix);
}
}
/* draw horizontal keyboard at y = bottom for 10 pixels
*/
static void
draw_keyboard_hor (GtkWidget *widget,
GdkGC *gc,
int width,
int bottom)
{
extern GdkPixmap *wav_pixmap;
extern int oct_min;
extern int oct_max;
extern double logf_min;
extern double logf_max;
int i, j;
int ix;
double x;
int idx = (int)((double)width / (double)(oct_max - oct_min) / 12.0);
int ix0 = idx / 2;
/* white box (0, bottom - height) to (10, height) */
get_color (widget, 255, 255, 255, gc); // white
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, bottom - 10,
width, 11);
get_color (widget, 0, 0, 0, gc); // black
for (i = oct_min; i < oct_max; i ++)
{
// C# (Db)
j = 1;
ix = ix0 + midi_to_display_bottom ((i+1)*12+j, width);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
ix, bottom - 9,
idx, 6);
// D# (Eb)
j = 3;
ix = ix0 + midi_to_display_bottom ((i+1)*12+j, width);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
ix, bottom - 9,
idx, 6);
// F# (Gb)
j = 6;
ix = ix0 + midi_to_display_bottom ((i+1)*12+j, width);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
ix, bottom - 9,
idx, 6);
// G# (Ab)
j = 8;
ix = ix0 + midi_to_display_bottom ((i+1)*12+j, width);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
ix, bottom - 9,
idx, 6);
// A# (Bb)
j = 10;
ix = ix0 + midi_to_display_bottom ((i+1)*12+j, width);
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
ix, bottom - 9,
idx, 6);
// on the black key of C#
j = 1;
x = midi_to_logf ((i+1)*12+j);
ix = ix0 + (int)((double)width * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
ix, bottom - 9,
ix, bottom);
// on the black key of D#
j = 3;
x = midi_to_logf ((i+1)*12+j);
ix = ix0 + (int)((double)width * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
ix, bottom - 9,
ix, bottom);
// on the black key of F#
j = 6;
x = midi_to_logf ((i+1)*12+j);
ix = ix0 + (int)((double)width * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
ix, bottom - 9,
ix, bottom);
// on the black key of G#
j = 8;
x = midi_to_logf ((i+1)*12+j);
ix = ix0 + (int)((double)width * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
ix, bottom - 9,
ix, bottom);
// on the black key of A#
j = 10;
x = midi_to_logf ((i+1)*12+j);
ix = ix0 + (int)((double)width * (x - logf_min) / (logf_max - logf_min));
gdk_draw_line (wav_pixmap, gc,
ix, bottom - 9,
ix, bottom);
// between E and F
j = 4;
ix = ix0 + midi_to_display_top ((i+1)*12+j, width);
gdk_draw_line (wav_pixmap, gc,
ix, bottom - 9,
ix, bottom);
// between B and C
j = 11;
ix = ix0 + midi_to_display_top ((i+1)*12+j, width);
gdk_draw_line (wav_pixmap, gc,
ix, bottom - 9,
ix, bottom);
}
}
/*
* INPUT
* drop : positive => make drop shadow by (rd, gd, bd)
* zero => no drop shadow
*/
static void
draw_text (GtkWidget *widget,
GdkGC *gc,
gint x, gint y,
const gchar *text,
gint r, gint g, gint b,
gint drop,
gint rd, gint gd, gint bd,
const gchar *font)
{
PangoLayout *layout
= gtk_widget_create_pango_layout (widget, text);
PangoFontDescription *fontdesc
= pango_font_description_from_string (font);
pango_layout_set_font_description (layout, fontdesc);
pango_font_description_free (fontdesc);
if (drop > 0)
{
get_color (widget, rd, gd, bd, gc);
gdk_draw_layout (wav_pixmap, gc, x+drop, y+drop, layout);
}
get_color (widget, r, g, b, gc);
gdk_draw_layout (wav_pixmap, gc, x, y, layout);
g_object_unref (layout);
}
void draw_infos (GtkWidget *widget,
GdkGC *gc,
int y_spec_top, int y_spec_bottom,
gint r, gint g, gint b,
gint drop,
gint rd, gint gd, gint bd,
const gchar *font)
{
extern int WIN_spec_n;
extern int WIN_spec_hop;
extern int WIN_spec_mode;
extern int flag_window;
extern double amp2_min;
extern double amp2_max;
extern int oct_min;
extern int oct_max;
//extern struct pv_complex *pv;
gchar string [256];
// informations
sprintf (string, "N = %d", WIN_spec_n);
draw_text (widget, gc, 100, 0, string,
r, g, b, drop, rd, gd, bd, font);
sprintf (string, "H = %d (%d)", WIN_spec_hop, WIN_spec_hop_scale);
draw_text (widget, gc, 280, 0, string,
r, g, b, drop, rd, gd, bd, font);
// spectrum mode
switch (WIN_spec_mode)
{
case 0: // plain FFT
strcpy (string, "plain FFT");
break;
case 1: // FFT w PV suggestions
strcpy (string, "FFT w PV");
break;
case 2: // PV-corrected Spectrum
strcpy (string, "PV-FFT");
break;
}
draw_text (widget, gc, 400, 0, string,
r, g, b, drop, rd, gd, bd, font);
// window
switch (flag_window)
{
case 0: // square (no window)
strcpy (string, "square");
break;
case 1: // parzen window
strcpy (string, "parzen");
break;
case 2: // welch window
strcpy (string, "welch");
break;
case 3: // hanning window
strcpy (string, "hanning");
break;
case 4: // hamming window
strcpy (string, "hamming");
break;
case 5: // blackman window
strcpy (string, "blackman");
break;
case 6: // steeper 30-dB/octave rolloff window
strcpy (string, "steeper");
break;
}
draw_text (widget, gc, 200, 0, string,
r, g, b, drop, rd, gd, bd, font);
// phase lock
/*
if (pv->flag_lock == 0)
{
strcpy (string, "no lock");
}
else
{
strcpy (string, "loose lock");
}
draw_text (widget, gc, 480, 0, string,
r, g, b, drop, rd, gd, bd, font);
*/
sprintf (string, "10^%.0f", amp2_max);
draw_text (widget, gc, 10, y_spec_top, string,
r, g, b, drop, rd, gd, bd, font);
sprintf (string, "10^%.0f", amp2_min);
draw_text (widget, gc, 10, y_spec_bottom-15, string,
r, g, b, drop, rd, gd, bd, font);
sprintf (string, "(Oct:%d)", oct_max-1);
draw_text (widget, gc,
WIN_wav_width - 50, 0, string,
r, g, b, drop, rd, gd, bd, font);
// experimental
extern double octave_removal_factor;
sprintf (string, "OctRm=%.0f", octave_removal_factor);
draw_text (widget, gc, 500, 0, string,
r, g, b, drop, rd, gd, bd, font);
}
/*
* INPUT
* i : starting frame to analyse
* r_amp2 : if NULL is given, l+r are returned in l_amp2 (and l_ph)
* ph : if NULL is given, just l_amp2 (and r_amp2) is calculated.
* OUTPUT
* l_amp2, r_amp2 : amp^2 scaled by WIN_spec_n.
* l_ph, r_ph : phase if ph is not NULL
*/
static void
fft_one_frame (int i,
double *l_amp2, double *r_amp2,
double *l_ph, double *r_ph)
{
extern SNDFILE *sf;
extern SF_INFO sfinfo;
extern int WIN_spec_n;
extern double *spec_left;
extern double *spec_right;
extern fftw_plan plan;
int k;
// read data
for (k = 0; k < WIN_spec_n; k ++)
{
spec_left [k] = spec_right [k] = 0.0;
}
sndfile_read_at (sf, sfinfo,
i,
spec_left, spec_right,
WIN_spec_n);
if (r_amp2 == NULL)
{
// left + right
for (k = 0; k < WIN_spec_n; k ++)
{
spec_in [k] = 0.5 * (spec_left [k] + spec_right [k]);
}
windowing (WIN_spec_n, spec_in, flag_window, 1.0, spec_in);
fftw_execute (plan); // FFT: spec_in[] -> spec_out[]
if (l_ph == NULL)
{
HC_to_amp2 (WIN_spec_n, spec_out, (double)WIN_spec_n,
l_amp2);
}
else
{
HC_to_polar2 (WIN_spec_n, spec_out, 0, (double)WIN_spec_n,
l_amp2, l_ph);
}
}
else
{
// left
windowing (WIN_spec_n, spec_left, flag_window, 1.0, spec_in);
fftw_execute (plan); // FFT: spec_in[] -> spec_out[]
if (l_ph == NULL)
{
HC_to_amp2 (WIN_spec_n, spec_out, (double)WIN_spec_n,
l_amp2);
}
else
{
HC_to_polar2 (WIN_spec_n, spec_out, 0, (double)WIN_spec_n,
l_amp2, l_ph);
}
// right
windowing (WIN_spec_n, spec_right, flag_window, 1.0, spec_in);
fftw_execute (plan); // FFT: spec_in[] -> spec_out[]
if (l_ph == NULL)
{
HC_to_amp2 (WIN_spec_n, spec_out, (double)WIN_spec_n,
r_amp2);
}
else
{
HC_to_polar2 (WIN_spec_n, spec_out, 0, (double)WIN_spec_n,
r_amp2, r_ph);
}
}
}
/*
* INPUT
* r_amp2 : if NULL is given, left+right is analised.
* l_dphi, r_dphi :
* dphi[k] = principal(ph2 - ph1 - Omega[k]),
* where principal() rounds the value in [-pi, pi]
* and Omega[k] = 2pi k hop / N.
* NOTE the real frequency of k-bin in Hz is, therefore,
* (k + [lr]_f * N) * samplerate / N
*
* = (k / N + [lr]_f) * samplerate
*/
static void
fft_two_frames (int i, int hop,
double *l_amp2, double *r_amp2,
double *l_ph, double *r_ph,
double *l_dphi, double *r_dphi)
{
double *l_ph1 = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
double *r_ph1 = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
CHECK_MALLOC (l_ph1, "fft_two_frames");
CHECK_MALLOC (r_ph1, "fft_two_frames");
fft_one_frame (i + hop, l_amp2, r_amp2, l_ph1, r_ph1);
fft_one_frame (i, l_amp2, r_amp2, l_ph, r_ph);
// because we need [lr]_amp2 at the frame i
// freq correction by phase difference
double twopi = 2.0 * M_PI;
for (i = 0; i < (WIN_spec_n/2)+1; ++i) // full span
{
double dphi;
// left
dphi = l_ph1[i] - l_ph[i]
- twopi * (double)i / (double)WIN_spec_n * (double)hop;
for (; dphi >= M_PI; dphi -= twopi);
for (; dphi < -M_PI; dphi += twopi);
l_dphi [i] = dphi / twopi / (double)hop;
// right
if (r_amp2 != NULL)
{
dphi = r_ph1[i] - r_ph[i]
- twopi * (double)i / (double)WIN_spec_n * (double)hop;
for (; dphi >= M_PI; dphi -= twopi);
for (; dphi < -M_PI; dphi += twopi);
r_dphi [i] = dphi / twopi / (double)hop;
}
}
free (l_ph1);
free (r_ph1);
}
/*
* amp [resolution] : note that this is not squared.
*/
static void
average_PV_FFT (int resolution,
const double *amp2, const double *dphi,
double *amp)
{
extern int WIN_spec_n;
extern SF_INFO sfinfo;
extern double logf_min;
extern double logf_max;
int i;
for (i = 0; i < resolution; i ++)
{
amp [i] = 0.0;
}
int k;
for (k = 1; k < (WIN_spec_n+1)/2; k ++)
{
// freq -> display position
double x = log (((double)k / (double)WIN_spec_n + dphi [k])
* sfinfo.samplerate);
int ix
= (int)((double)resolution * (x - logf_min) / (logf_max - logf_min));
if (ix < 0 || ix >= resolution)
continue;
amp [ix] += sqrt (amp2 [k]);
}
// experimental
extern double octave_removal_factor;
if (octave_removal_factor <= 0.0) return;
double *amp0 = (double *)malloc (resolution * sizeof (double));
CHECK_MALLOC (amp0, "average_PV_FFT");
for (i = 0; i < resolution; i ++)
{
amp0[i] = amp[i];
}
for (i = 0; i < (resolution - 12); i ++)
{
amp [i + 12] -= octave_removal_factor * amp0 [i];
if (amp [i + 12] < 0.0)
{
amp [i + 12] = 0.0;
}
}
free (amp0);
}
/* draw spectrum panel (power and phase spectra)
* INPUT
*/
static void
draw_spectrum_frame (GtkWidget *widget,
GdkGC *gc,
int bottom_spec, int height_spec,
int bottom_phase, int height_phase)
{
extern GdkPixmap *wav_pixmap;
extern gint WIN_wav_width;
extern int WIN_spec_mode;
extern double amp2_min;
extern double amp2_max;
extern SNDFILE *sf;
extern SF_INFO sfinfo;
int i;
double x;
int ix, ix0;
double y;
int iy;
int ic;
int max_rad_phase = 6;
double ph_min, ph_max;
ph_min = - M_PI;
ph_max = + M_PI;
int rad;
// clear image first
get_color (widget, 0, 0, 0, gc);
// spec
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, bottom_spec - height_spec,
WIN_wav_width, height_spec);
// phase
gdk_draw_rectangle (wav_pixmap, gc, TRUE, // fill
0, bottom_phase - height_phase,
WIN_wav_width, height_phase);
// center of the phase (zero)
get_color (widget, 0, 0, 255, gc); // blue
gdk_draw_line (wav_pixmap, gc,
0, bottom_phase - height_phase/2,
WIN_wav_width, bottom_phase - height_phase/2);
// draw lines separating octaves for spectrum and phase panels
// i is the midi octave
for (i = oct_min + 1; i < oct_max; i ++)
{
ix = logf_to_display (midi_to_logf ((i+1)*12),
WIN_wav_width);
gdk_draw_line (wav_pixmap, gc,
ix, 0,
ix, bottom_phase);
}
// backup GdkFunction
GdkGCValues backup_gc_values;
gdk_gc_get_values (gc, &backup_gc_values);
// the following is the dynamic
if (sf != NULL)
{
// allocate working area
double *l_amp2 = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
double *r_amp2 = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
CHECK_MALLOC (l_amp2, "draw_spectrum_frame");
CHECK_MALLOC (r_amp2, "draw_spectrum_frame");
double *l_ph = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
double *r_ph = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
CHECK_MALLOC (l_ph, "draw_spectrum_frame");
CHECK_MALLOC (r_ph, "draw_spectrum_frame");
double *l_dphi = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
double *r_dphi = (double *)malloc (sizeof (double) * ((WIN_spec_n/2)+1));
CHECK_MALLOC (l_dphi, "draw_spectrum_frame");
CHECK_MALLOC (r_dphi, "draw_spectrum_frame");
extern int oct_max, oct_min;
int resolution = (oct_max - oct_min) * 12;
double *l_ave = NULL;
double *r_ave = NULL;
if (WIN_spec_mode == 2)
{
l_ave = (double *)malloc (sizeof (double) * resolution);
r_ave = (double *)malloc (sizeof (double) * resolution);
CHECK_MALLOC (l_ave, "draw_spectrum_frame");
CHECK_MALLOC (r_ave, "draw_spectrum_frame");
}
// set GC wiht OR function
gdk_gc_set_function (gc, GDK_OR);
// analyse the frame WIN_wav_mark
if (WIN_spec_mode == 0)
{
fft_one_frame (WIN_wav_mark,
l_amp2, r_amp2,
l_ph, r_ph);
}
else
{
fft_two_frames (WIN_wav_mark, WIN_spec_hop,
l_amp2, r_amp2,
l_ph, r_ph,
l_dphi, r_dphi);
if (WIN_spec_mode == 2)
{
average_PV_FFT (resolution, l_amp2, l_dphi, l_ave);
average_PV_FFT (resolution, r_amp2, r_dphi, r_ave);
}
}
// left power and phase
for (i = 0; i < (WIN_spec_n/2)+1; i ++) // full span
{
x = log ((double)i / (double)WIN_spec_n * sfinfo.samplerate);
ix = logf_to_display (x, WIN_wav_width);
if (ix < 0 || ix >= WIN_wav_width)
continue;
// left power
y = log10 (l_amp2 [i]);
iy = (int)((double)height_spec * (y - amp2_min)
/ (amp2_max - amp2_min));