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oscplot.c
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/**
* Copyright (C) 2012-2013 Analog Devices, Inc.
*
* Licensed under the GPL-2.
*
**/
#include <stdio.h>
#include <gtk/gtk.h>
#include <gtkdatabox.h>
#include <gtkdatabox_grid.h>
#include <gtkdatabox_points.h>
#include <gtkdatabox_lines.h>
#include <gtkdatabox_markers.h>
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <math.h>
#include <matio.h>
#include <string.h>
#include <sys/types.h>
#include <dirent.h>
#include <complex.h>
#include <fftw3.h>
#include <iio.h>
#include "osc.h"
#include "oscplot.h"
#include "config.h"
#include "iio_widget.h"
#include "datatypes.h"
#include "osc_plugin.h"
#include "math_expression_generator.h"
/* add backwards compat for <matio-1.5.0 */
#if MATIO_MAJOR_VERSION == 1 && MATIO_MINOR_VERSION < 5
typedef int mat_dim;
#else
typedef size_t mat_dim;
#endif
extern void *find_setup_check_fct_by_devname(const char *dev_name);
static int (*plugin_setup_validation_fct)(struct iio_device *, const char **) = NULL;
static unsigned object_count = 0;
static void create_plot (OscPlot *plot);
static void plot_setup(OscPlot *plot);
static void capture_button_clicked_cb (GtkToggleToolButton *btn, gpointer data);
static void single_shot_clicked_cb (GtkToggleToolButton *btn, gpointer data);
static void update_grid(OscPlot *plot, gfloat min, gfloat max);
static void add_grid(OscPlot *plot);
static void rescale_databox(OscPlotPrivate *priv, GtkDatabox *box, gfloat border);
static bool call_all_transform_functions(OscPlotPrivate *priv);
static void capture_start(OscPlotPrivate *priv);
static void plot_profile_save(OscPlot *plot, char *filename);
static void transform_add_plot_markers(OscPlot *plot, Transform *transform);
static void osc_plot_finalize(GObject *object);
static void osc_plot_dispose(GObject *object);
static void save_as(OscPlot *plot, const char *filename, int type);
static void treeview_expand_update(OscPlot *plot);
static void treeview_icon_color_update(OscPlot *plot);
static int enabled_channels_of_device(GtkTreeView *treeview, const char *name, unsigned *enabled_mask);
static int enabled_channels_count(OscPlot *plot);
static int num_of_channels_of_device(GtkTreeView *treeview, const char *name);
static gboolean get_iter_by_name(GtkTreeView *tree, GtkTreeIter *iter, const char *dev_name, const char *ch_name);
static void set_marker_labels (OscPlot *plot, gchar *buf, enum marker_types type);
static void channel_color_icon_set_color(GdkPixbuf *pb, GdkColor *color);
static int comboboxtext_set_active_by_string(GtkComboBox *combo_box, const char *name);
static int comboboxtext_get_active_text_as_int(GtkComboBoxText* combobox);
static gboolean check_valid_setup(OscPlot *plot);
static int device_find_by_name(struct iio_context *ctx, const char *name);
static int channel_find_by_name(struct iio_context *ctx, int device_index, const char *name);
static void device_rx_info_update(OscPlot *plot);
static gdouble prefix2scale (char adc_scale);
static struct iio_device * transform_get_device_parent(Transform *transform);
static gboolean tree_get_selected_row_iter(GtkTreeView *treeview, GtkTreeIter *iter);
static void set_channel_shadow_of_enabled(gpointer data, gpointer user_data);
static gfloat * plot_channels_get_nth_data_ref(GSList *list, guint n);
static void transform_add_own_markers(OscPlot *plot, Transform *transform);
static void transform_remove_own_markers(Transform *transform);
/* IDs of signals */
enum {
CAPTURE_EVENT_SIGNAL,
DESTROY_EVENT_SIGNAL,
NEWPLOT_EVENT_SIGNAL,
LAST_SIGNAL
};
/* signals will be configured during class init */
static guint oscplot_signals[LAST_SIGNAL] = { 0 };
/* Columns of the device treestore */
enum {
ELEMENT_NAME,
IS_DEVICE,
IS_CHANNEL,
CHANNEL_TYPE,
DEVICE_SELECTABLE,
DEVICE_ACTIVE,
CHANNEL_ACTIVE,
ELEMENT_REFERENCE,
EXPANDED,
CHANNEL_SETTINGS,
CHANNEL_COLOR_ICON,
SENSITIVE,
PLOT_TYPE,
NUM_COL
};
/* Horizontal Scale Types */
enum {
HOR_SCALE_SAMPLES,
HOR_SCALE_TIME,
HOR_SCALE_NUM_OPTIONS
};
/* Types of channels that can be displayed on a plot */
enum {
PLOT_IIO_CHANNEL = 0,
PLOT_MATH_CHANNEL,
NUM_PLOT_CHANNELS_TYPES
};
#define MATH_CHANNELS_DEVICE "Math"
#define OSC_COLOR(r, g, b) { \
.red = (r) << 8, \
.green = (g) << 8, \
.blue = (b) << 8, \
}
static GdkColor color_graph[] = {
OSC_COLOR(138, 226, 52),
OSC_COLOR(239, 41, 41),
OSC_COLOR(114, 159, 207),
OSC_COLOR(252, 175, 62),
OSC_COLOR(211, 215, 208),
OSC_COLOR(252, 233, 79),
OSC_COLOR(173, 127, 168),
OSC_COLOR(233, 185, 110),
OSC_COLOR(115, 210, 22),
OSC_COLOR(204, 0, 0),
OSC_COLOR(52, 101, 164),
OSC_COLOR(245, 121, 0),
OSC_COLOR(186, 189, 182),
OSC_COLOR(237, 212, 0),
OSC_COLOR(117, 80, 123),
OSC_COLOR(193, 125, 17),
};
#define NUM_GRAPH_COLORS (sizeof(color_graph) / sizeof(color_graph[0]))
static GdkColor color_grid = {
.red = 51000,
.green = 51000,
.blue = 0,
};
static GdkColor color_background = {
.red = 0,
.green = 0,
.blue = 0,
};
static GdkColor color_marker = {
.red = 0xFFFF,
.green = 0,
.blue = 0xFFFF,
};
typedef struct channel_settings PlotChn;
typedef struct iio_channel_settings PlotIioChn;
typedef struct math_channel_settings PlotMathChn;
struct channel_settings {
unsigned type;
char *name;
char *parent_name;
struct iio_context *ctx;
GdkColor graph_color;
struct iio_device * (*get_iio_parent)(PlotChn *);
gfloat * (*get_data_ref)(PlotChn *);
void (*assert_used_iio_channels)(PlotChn *, bool);
void (*destroy)(PlotChn *);
};
struct iio_channel_settings {
PlotChn base;
struct iio_channel *iio_chn;
bool apply_inverse_funct;
bool apply_multiply_funct;
bool apply_add_funct;
double multiply_value;
double add_value;
};
struct math_channel_settings {
PlotChn base;
GSList *iio_channels;
gfloat ***iio_channels_data;
int num_channels;
char *iio_device_name;
char *txt_math_expression;
void (*math_expression)(float ***channels_data, float *out_data, unsigned long long chn_sample_cnt);
void *math_lib_handler;
float *data_ref;
};
/* Helpers */
#define TIME_SETTINGS(obj) ((struct _time_settings *)obj->settings)
#define FFT_SETTINGS(obj) ((struct _fft_settings *)obj->settings)
#define CONSTELLATION_SETTINGS(obj) ((struct _constellation_settings *)obj->settings)
#define XCORR_SETTINGS(obj) ((struct _cross_correlation_settings *)obj->settings)
#define FREQ_SPECTRUM_SETTINGS(obj) ((struct _freq_spectrum_settings *)obj->settings)
#define MATH_SETTINGS(obj) ((struct _math_settings *)obj->settings)
#define PLOT_CHN(obj) ((PlotChn *)obj)
#define PLOT_IIO_CHN(obj) ((PlotIioChn *)obj)
#define PLOT_MATH_CHN(obj) ((PlotMathChn *)obj)
struct int_and_plot {
int int_obj;
OscPlot *plot;
};
struct string_and_plot {
char *string_obj;
OscPlot *plot;
};
struct plot_geometry {
gint width;
gint height;
};
struct _OscPlotPrivate
{
GtkBuilder *builder;
int object_id;
/* Graphical User Interface */
GtkWidget *window;
GtkWidget *databox;
GtkWidget *capture_graph;
GtkWidget *capture_button;
GtkWidget *ss_button;
GtkWidget *channel_list_view;
GtkWidget *show_grid;
GtkWidget *plot_type;
GtkWidget *plot_domain;
GtkWidget *enable_auto_scale;
GtkWidget *hor_scale;
GtkWidget *hor_units;
GtkWidget *marker_label;
GtkWidget *devices_label;
GtkWidget *phase_label;
GtkWidget *saveas_button;
GtkWidget *saveas_dialog;
GtkWidget *saveas_type_dialog;
GtkWidget *title_edit_dialog;
GtkWidget *fullscreen_button;
GtkWidget *menu_fullscreen;
GtkWidget *menu_show_options;
GtkWidget *y_axis_max;
GtkWidget *y_axis_min;
GtkWidget *viewport_saveas_channels;
GtkWidget *saveas_channels_list;
GtkWidget *saveas_select_channel_message;
GtkWidget *device_combobox;
GtkWidget *sample_count_widget;
unsigned int sample_count;
GtkWidget *fft_size_widget;
GtkWidget *fft_avg_widget;
GtkWidget *fft_pwr_offset_widget;
GtkWidget *device_settings_menu;
GtkWidget *math_settings_menu;
GtkWidget *device_trigger_menuitem;
GtkWidget *math_menuitem;
GtkWidget *plot_trigger_menuitem;
GtkWidget *channel_settings_menu;
GtkWidget *math_channel_settings_menu;
GtkWidget *channel_expression_edit_menuitem;
GtkWidget *channel_iio_color_menuitem;
GtkWidget *channel_math_color_menuitem;
GtkWidget *channel_math_menuitem;
GtkWidget *channel_remove_menuitem;
GtkWidget *math_dialog;
GtkWidget *capture_options_box;
GtkWidget *saveas_settings_box;
GtkWidget *save_mat_scale;
GtkWidget *new_plot_button;
GtkWidget *cmb_saveas_type;
GtkWidget *math_expression_dialog;
GtkWidget *math_expression_textview;
GtkWidget *math_device_select;
GtkWidget *math_channel_name_entry;
GtkWidget *math_expr_error;
GtkTextBuffer* tbuf;
GtkTextBuffer* devices_buf;
GtkTextBuffer* phase_buf;
GtkTextBuffer* math_expression;
struct iio_context *ctx;
unsigned int nb_input_devices;
unsigned int nb_plot_channels;
struct plot_geometry size;
int frame_counter;
time_t last_update;
int last_hor_unit;
int do_a_rescale_flag;
gulong capture_button_hid;
gint deactivate_capture_btn_flag;
bool single_shot_mode;
/* A reference to the device holding the most recent created transform */
struct iio_device *current_device;
/* List of transforms for this plot */
TrList *transform_list;
/* Active transform type for this window */
int active_transform_type;
/* Transform currently holding the fft marker */
Transform *tr_with_marker;
/* Type of "Save As" currently selected*/
gint active_saveas_type;
/* The set of markers */
struct marker_type markers[MAX_MARKERS + 2];
struct marker_type *markers_copy;
enum marker_types marker_type;
/* Settings list of all channel */
GSList *ch_settings_list;
/* Databox data */
GtkDataboxGraph *grid;
gfloat gridy[25], gridx[25];
/* Spectrum mode - Parameters */
unsigned fft_count;
double start_freq;
double filter_bw;
gint line_thickness;
gint redraw_function;
gboolean stop_redraw;
gboolean redraw;
bool spectrum_data_ready;
gboolean fullscreen_state;
bool profile_loaded_scale;
bool save_as_png;
char *saveas_filename;
struct int_and_plot fix_marker;
struct string_and_plot add_mrk;
struct string_and_plot remove_mrk;
struct string_and_plot peak_mrk;
struct string_and_plot fix_mrk;
struct string_and_plot single_mrk;
struct string_and_plot dual_mrk;
struct string_and_plot image_mrk;
struct string_and_plot off_mrk;
gulong fixed_marker_hid;
gint plot_x_pos;
gint plot_y_pos;
gfloat plot_left;
gfloat plot_right;
gfloat plot_top;
gfloat plot_bottom;
int read_scale_params;
GMutex g_marker_copy_lock;
void (*quit_callback)(void *user_data);
void *qcb_user_data;
};
G_DEFINE_TYPE(OscPlot, osc_plot, GTK_TYPE_WIDGET)
static void osc_plot_class_init(OscPlotClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->dispose = osc_plot_dispose;
gobject_class->finalize = osc_plot_finalize;
oscplot_signals[CAPTURE_EVENT_SIGNAL] = g_signal_new("osc-capture-event",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (OscPlotClass, capture_event),
NULL,
NULL,
g_cclosure_marshal_VOID__BOOLEAN,
G_TYPE_NONE, 1, G_TYPE_BOOLEAN);
oscplot_signals[DESTROY_EVENT_SIGNAL] = g_signal_new("osc-destroy-event",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (OscPlotClass, destroy_event),
NULL,
NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
oscplot_signals[NEWPLOT_EVENT_SIGNAL] = g_signal_new("osc-newplot-event",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (OscPlotClass, newplot_event),
NULL,
NULL,
g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE, 1, G_TYPE_POINTER);
g_type_class_add_private (gobject_class, sizeof (OscPlotPrivate));
}
static void osc_plot_init(OscPlot *plot)
{
plot->priv = G_TYPE_INSTANCE_GET_PRIVATE (plot, OSC_PLOT_TYPE, OscPlotPrivate);
}
GtkWidget *osc_plot_new(struct iio_context *ctx)
{
GtkWidget *plot;
plot = GTK_WIDGET(g_object_new(OSC_PLOT_TYPE, NULL));
OSC_PLOT(plot)->priv->ctx = ctx;
create_plot(OSC_PLOT(plot));
return plot;
}
void osc_plot_destroy (OscPlot *plot)
{
gtk_widget_destroy(plot->priv->window);
gtk_widget_destroy(GTK_WIDGET(plot));
}
void osc_plot_reset_numbering (void)
{
object_count = 0;
}
void osc_plot_set_visible (OscPlot *plot, bool visible)
{
gtk_widget_set_visible(plot->priv->window, visible);
}
struct iio_buffer * osc_plot_get_buffer(OscPlot *plot)
{
struct extra_dev_info *dev_info;
dev_info = iio_device_get_data(plot->priv->current_device);
return dev_info->buffer;
}
void osc_plot_data_update (OscPlot *plot)
{
if (call_all_transform_functions(plot->priv))
plot->priv->redraw = TRUE;
if (plot->priv->single_shot_mode) {
plot->priv->single_shot_mode = false;
gtk_toggle_tool_button_set_active(GTK_TOGGLE_TOOL_BUTTON(plot->priv->capture_button), false);
}
}
static bool is_frequency_transform(OscPlotPrivate *priv)
{
return priv->active_transform_type == FFT_TRANSFORM ||
priv->active_transform_type == COMPLEX_FFT_TRANSFORM ||
priv->active_transform_type == FREQ_SPECTRUM_TRANSFORM;
}
void osc_plot_update_rx_lbl(OscPlot *plot, bool force_update)
{
OscPlotPrivate *priv = plot->priv;
TrList *tr_list = priv->transform_list;
struct extra_dev_info *dev_info = NULL;
char buf[20];
double corr;
int i;
device_rx_info_update(plot);
/* Skip rescaling graphs, updating labels and others if the redrawing is currently halted. */
if (priv->redraw_function <= 0 && !force_update)
return;
if (is_frequency_transform(priv)) {
gfloat top, bottom, left, right;
gfloat padding;
/* In FFT mode we need to scale the x-axis according to the selected sampling frequency */
for (i = 0; i < tr_list->size; i++) {
Transform_setup(tr_list->transforms[i]);
gtk_databox_graph_set_hide(tr_list->transforms[i]->graph, TRUE);
}
dev_info = iio_device_get_data(transform_get_device_parent(tr_list->transforms[i - 1]));
sprintf(buf, "%cHz", dev_info->adc_scale);
gtk_label_set_text(GTK_LABEL(priv->hor_scale), buf);
if (priv->active_transform_type == COMPLEX_FFT_TRANSFORM)
corr = dev_info->adc_freq / 2.0;
else
corr = 0;
if (!gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(priv->enable_auto_scale)) && !force_update)
return;
if (priv->profile_loaded_scale)
return;
update_grid(plot, -corr, dev_info->adc_freq / 2.0);
padding = (dev_info->adc_freq / 2.0 + corr) * 0.05;
gtk_databox_get_total_limits(GTK_DATABOX(priv->databox), &left, &right,
&top, &bottom);
gtk_databox_set_total_limits(GTK_DATABOX(priv->databox),
-corr - padding, dev_info->adc_freq / 2.0 + padding,
top, bottom);
} else {
switch (gtk_combo_box_get_active(GTK_COMBO_BOX(priv->hor_units))) {
case 0:
gtk_label_set_text(GTK_LABEL(priv->hor_scale), "Samples");
break;
case 1:
gtk_label_set_text(GTK_LABEL(priv->hor_scale), "µs");
break;
}
}
}
void osc_plot_restart (OscPlot *plot)
{
OscPlotPrivate *priv = plot->priv;
if (priv->redraw_function > 0)
{
priv->stop_redraw = TRUE;
plot_setup(plot);
add_grid(plot);
gtk_widget_queue_draw(priv->databox);
priv->frame_counter = 0;
capture_start(priv);
}
}
bool osc_plot_running_state (OscPlot *plot)
{
return !!plot->priv->redraw_function;
}
void osc_plot_draw_start (OscPlot *plot)
{
OscPlotPrivate *priv = plot->priv;
gtk_toggle_tool_button_set_active((GtkToggleToolButton *)priv->capture_button, TRUE);
}
void osc_plot_draw_stop (OscPlot *plot)
{
OscPlotPrivate *priv = plot->priv;
gtk_toggle_tool_button_set_active((GtkToggleToolButton *)priv->capture_button, FALSE);
}
void osc_plot_save_to_ini (OscPlot *plot, char *filename)
{
plot_profile_save(plot, filename);
}
void osc_plot_save_as (OscPlot *plot, char *filename, int type)
{
save_as(plot, filename, type);
}
const char * osc_plot_get_active_device (OscPlot *plot)
{
OscPlotPrivate *priv = plot->priv;
GtkTreeModel *model;
GtkTreeIter iter;
gboolean next_iter;
gboolean active;
struct iio_device *dev;
model = gtk_tree_view_get_model(GTK_TREE_VIEW(priv->channel_list_view));
next_iter = gtk_tree_model_get_iter_first(model, &iter);
while (next_iter) {
gtk_tree_model_get(model, &iter, ELEMENT_REFERENCE, &dev, DEVICE_ACTIVE, &active, -1);
if (active)
return iio_device_get_name(dev) ?:
iio_device_get_id(dev);
next_iter = gtk_tree_model_iter_next(model, &iter);
}
return NULL;
}
int osc_plot_get_fft_avg (OscPlot *plot)
{
return gtk_spin_button_get_value(GTK_SPIN_BUTTON(plot->priv->fft_avg_widget));
}
int osc_plot_get_marker_type (OscPlot *plot)
{
return plot->priv->marker_type;
}
void osc_plot_set_marker_type (OscPlot *plot, int mtype)
{
plot->priv->marker_type = mtype;
set_marker_labels(plot, NULL, mtype);
}
void * osc_plot_get_markers_copy(OscPlot *plot)
{
return plot->priv->markers_copy;
}
void osc_plot_set_markers_copy (OscPlot *plot, void *value)
{
plot->priv->markers_copy = value;
}
void osc_plot_set_domain (OscPlot *plot, int domain)
{
OscPlotPrivate *priv = plot->priv;
if (gtk_toggle_tool_button_get_active((GtkToggleToolButton *)priv->capture_button))
return;
gtk_combo_box_set_active(GTK_COMBO_BOX(priv->plot_domain), domain);
}
int osc_plot_get_plot_domain (OscPlot *plot)
{
return gtk_combo_box_get_active(GTK_COMBO_BOX(plot->priv->plot_domain));
}
GMutex * osc_plot_get_marker_lock (OscPlot *plot)
{
return &plot->priv->g_marker_copy_lock;
}
bool osc_plot_set_sample_count (OscPlot *plot, gdouble count)
{
OscPlotPrivate *priv = plot->priv;
int ret;
if (gtk_toggle_tool_button_get_active((GtkToggleToolButton *)priv->capture_button))
return false;
if (gtk_combo_box_get_active(GTK_COMBO_BOX(priv->plot_domain)) == FFT_PLOT ||
gtk_combo_box_get_active(GTK_COMBO_BOX(priv->plot_domain)) == SPECTRUM_PLOT) {
char s_count[32];
snprintf(s_count, sizeof(s_count), "%d", (int)count);
ret = comboboxtext_set_active_by_string(GTK_COMBO_BOX(priv->fft_size_widget), s_count);
priv->sample_count = (int)count;
} else {
switch (gtk_combo_box_get_active(GTK_COMBO_BOX(priv->hor_units))) {
case 0:
gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->sample_count_widget), count);
priv->sample_count = (int)count;
break;
case 1:
gtk_spin_button_set_value(GTK_SPIN_BUTTON(priv->sample_count_widget), count);
break;
}
ret = 1;
}
return (ret) ? true : false;
}
double osc_plot_get_sample_count (OscPlot *plot) {
OscPlotPrivate *priv = plot->priv;
int count;
if (gtk_combo_box_get_active(GTK_COMBO_BOX(priv->plot_domain)) == FFT_PLOT ||
gtk_combo_box_get_active(GTK_COMBO_BOX(priv->plot_domain)) == SPECTRUM_PLOT)
count = comboboxtext_get_active_text_as_int(GTK_COMBO_BOX_TEXT(priv->fft_size_widget));
else
count = gtk_spin_button_get_value(GTK_SPIN_BUTTON(priv->sample_count_widget));
return count;
}
void osc_plot_set_channel_state(OscPlot *plot, const char *dev, unsigned int channel, bool state)
{
OscPlotPrivate *priv = plot->priv;
struct iio_context *ctx = priv->ctx;
struct iio_device *iio_dev;
struct iio_channel *iio_ch;
if (gtk_toggle_tool_button_get_active((GtkToggleToolButton *)priv->capture_button))
return;
if (!plot || !dev)
return;
iio_dev = iio_context_find_device(ctx, dev);
if (!iio_dev || !is_input_device(iio_dev))
return;
if (channel >= iio_device_get_channels_count(iio_dev))
return;
iio_ch = iio_device_get_channel(iio_dev, channel);
if (!iio_ch)
return;
GtkTreeView *tree = GTK_TREE_VIEW(priv->channel_list_view);
GtkTreeModel *model = gtk_tree_view_get_model(tree);
GtkTreeIter ch_iter;
const char *ch;
ch = iio_channel_get_id(iio_ch);
get_iter_by_name(tree, &ch_iter, dev, ch);
gtk_tree_store_set(GTK_TREE_STORE(model), &ch_iter, CHANNEL_ACTIVE, state, -1);
check_valid_setup(plot);
}
void osc_plot_xcorr_revert (OscPlot *plot, int revert)
{
TrList *tr_list = plot->priv->transform_list;
Transform *transform;
int i;
for (i = 0; i < tr_list->size; i++) {
transform = tr_list->transforms[i];
XCORR_SETTINGS(transform)->revert_xcorr = revert;
}
}
void osc_plot_set_quit_callback(OscPlot *plot,
void (*qcallback)(void *user_data), void *user_data)
{
g_return_if_fail(plot);
g_return_if_fail(qcallback);
plot->priv->quit_callback = qcallback;
plot->priv->qcb_user_data = user_data;
}
int osc_plot_get_id(OscPlot *plot)
{
return plot->priv->object_id;
}
void osc_plot_set_id(OscPlot *plot, int id)
{
plot->priv->object_id = id;
}
void osc_plot_spect_mode(OscPlot *plot, bool enable)
{
OscPlotPrivate *priv = plot->priv;
GtkComboBox *cbox = GTK_COMBO_BOX(priv->plot_domain);
g_return_if_fail(plot);
if (enable) {
if (!comboboxtext_set_active_by_string(cbox, "Spectrum Mode"))
gtk_combo_box_text_append_text(GTK_COMBO_BOX_TEXT(cbox),
"Spectrum Mode");
gtk_widget_hide(priv->capture_button);
gtk_widget_hide(priv->ss_button);
} else {
GtkTreeIter iter;
GtkTreeModel *model;
model = gtk_combo_box_get_model(cbox);
if (gtk_tree_model_get_iter_from_string(model, &iter,
"Spectrum Mode")) {
gtk_list_store_remove(GTK_LIST_STORE(model), &iter);
}
gtk_widget_show(priv->capture_button);
gtk_widget_show(priv->ss_button);
}
}
void osc_plot_spect_set_start_f(OscPlot *plot, double freq_mhz)
{
g_return_if_fail(plot);
plot->priv->start_freq = freq_mhz;
}
void osc_plot_spect_set_len(OscPlot *plot, unsigned fft_count)
{
g_return_if_fail(plot);
plot->priv->fft_count = fft_count;
}
void osc_plot_spect_set_filter_bw(OscPlot *plot, double bw)
{
g_return_if_fail(plot);
plot->priv->filter_bw = bw;
}
static void osc_plot_dispose(GObject *object)
{
G_OBJECT_CLASS(osc_plot_parent_class)->dispose(object);
}
static void osc_plot_finalize(GObject *object)
{
G_OBJECT_CLASS(osc_plot_parent_class)->finalize(object);
}
static double win_hanning(int j, int n)
{
double a = 2.0 * M_PI / (n - 1), w;
w = 0.5 * (1.0 - cos(a * j));
return (w);
}
static void do_fft(Transform *tr)
{
struct _fft_settings *settings = tr->settings;
struct _fft_alg_data *fft = &settings->fft_alg_data;
struct marker_type *markers = settings->markers;
enum marker_types marker_type = MARKER_OFF;
gfloat *in_data = settings->real_source;
gfloat *in_data_c;
gfloat *out_data = tr->y_axis;
gfloat *X = tr->x_axis;
int fft_size = settings->fft_size;
int i, j, k;
int cnt;
gfloat mag;
double avg, pwr_offset;
int maxX[MAX_MARKERS + 1];
gfloat maxY[MAX_MARKERS + 1];
gfloat plugin_fft_corr;
if (settings->marker_type)
marker_type = *((enum marker_types *)settings->marker_type);
if ((fft->cached_fft_size == -1) || (fft->cached_fft_size != fft_size) ||
(fft->cached_num_active_channels != fft->num_active_channels)) {
if (fft->cached_fft_size != -1) {
fftw_destroy_plan(fft->plan_forward);
fftw_free(fft->win);
fftw_free(fft->out);
if (fft->in != NULL)
fftw_free(fft->in);
if (fft->in_c != NULL)
fftw_free(fft->in_c);
fft->in_c = NULL;
fft->in = NULL;
}
fft->win = fftw_malloc(sizeof(double) * fft_size);
if (fft->num_active_channels == 2) {
fft->m = fft_size;
fft->in_c = fftw_malloc(sizeof(fftw_complex) * fft_size);
fft->in = NULL;
fft->out = fftw_malloc(sizeof(fftw_complex) * (fft->m + 1));
fft->plan_forward = fftw_plan_dft_1d(fft_size, fft->in_c, fft->out, FFTW_FORWARD, FFTW_ESTIMATE);
} else {
fft->m = fft_size / 2;
fft->out = fftw_malloc(sizeof(fftw_complex) * (fft->m + 1));
fft->in_c = NULL;
fft->in = fftw_malloc(sizeof(double) * fft_size);
fft->plan_forward = fftw_plan_dft_r2c_1d(fft_size, fft->in, fft->out, FFTW_ESTIMATE);
}
for (i = 0; i < fft_size; i ++)
fft->win[i] = win_hanning(i, fft_size);
fft->cached_fft_size = fft_size;
fft->cached_num_active_channels = fft->num_active_channels;
}
if (fft->num_active_channels == 2) {
in_data_c = settings->imag_source;
for (cnt = 0, i = 0; cnt < fft_size; cnt++) {
/* normalization and scaling see fft_corr */
fft->in_c[cnt] = in_data[i] * fft->win[cnt] + I * in_data_c[i] * fft->win[cnt];
i++;
}
} else {
for (cnt = 0, i = 0; i < fft_size; i++) {
/* normalization and scaling see fft_corr */
fft->in[cnt] = in_data[i] * fft->win[cnt];
cnt++;
}
}
struct iio_device *iio_dev = transform_get_device_parent(tr);
struct extra_dev_info *dev_info = iio_device_get_data(iio_dev);
plugin_fft_corr = dev_info->plugin_fft_corr;
fftw_execute(fft->plan_forward);
avg = (double)settings->fft_avg;
if (avg && avg != 128 )
avg = 1.0f / avg;
pwr_offset = settings->fft_pwr_off;
for (j = 0; j <= MAX_MARKERS; j++) {
maxX[j] = 0;
maxY[j] = -200.0f;
}
for (i = 0; i < fft->m; ++i) {
if (fft->num_active_channels == 2) {
if (i < (fft->m / 2))
j = i + (fft->m / 2);
else
j = i - (fft->m / 2);
} else {
j = i;
}
if (creal(fft->out[j]) == 0 && cimag(fft->out[j]) == 0)
fft->out[j] = FLT_MIN + I * FLT_MIN;
mag = 10 * log10((creal(fft->out[j]) * creal(fft->out[j]) +
cimag(fft->out[j]) * cimag(fft->out[j])) / ((unsigned long long)fft->m * fft->m)) +
fft->fft_corr + pwr_offset + plugin_fft_corr;
/* it's better for performance to have separate loops,
* rather than do these tests inside the loop, but it makes
* the code harder to understand... Oh well...
***/
if (out_data[i] == FLT_MAX) {
/* Don't average the first iteration */
out_data[i] = mag;
} else if (!avg) {
/* keep peaks */
if (out_data[i] <= mag)
out_data[i] = mag;
} else if (avg == 128) {
/* keep min */
if (out_data[i] >= mag)
out_data[i] = mag;
} else {
/* do an average */
out_data[i] = ((1 - avg) * out_data[i]) + (avg * mag);
}
if (!settings->markers || i < 2)
continue;
if (MAX_MARKERS && (marker_type == MARKER_PEAK ||
marker_type == MARKER_ONE_TONE ||
marker_type == MARKER_IMAGE)) {
if (i <= 2) {
maxX[0] = 0;
maxY[0] = out_data[0];
} else {
for (j = 0; j <= MAX_MARKERS && markers[j].active; j++) {
if ((out_data[i - 1] > maxY[j]) &&
((!((out_data[i - 2] > out_data[i - 1]) &&
(out_data[i - 1] > out_data[i]))) &&
(!((out_data[i - 2] < out_data[i - 1]) &&
(out_data[i - 1] < out_data[i]))))) {
if (marker_type == MARKER_PEAK) {
for (k = MAX_MARKERS; k > j; k--) {
maxY[k] = maxY[k - 1];
maxX[k] = maxX[k - 1];
}
}
maxY[j] = out_data[i - 1];
maxX[j] = i - 1;
break;
}
}
}