92932dbb26
jandejongh reported: In the USB Levels display, user can (attempt to) set the level of the "slider". Expected: These "sliders" are read-only and should not allow setting a value (makes no sense to me?). Fixes: #78.
124 lines
3.1 KiB
C
124 lines
3.1 KiB
C
// SPDX-FileCopyrightText: 2022 Geoffrey D. Bennett <g@b4.vu>
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// SPDX-License-Identifier: GPL-3.0-or-later
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#include <gtk/gtk.h>
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#include "gtkdial.h"
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#include "gtkhelper.h"
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#include "stringhelper.h"
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#include "widget-gain.h"
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#include "window-levels.h"
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static int update_levels_controls(void *user_data) {
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struct alsa_card *card = user_data;
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struct alsa_elem *level_meter_elem = card->level_meter_elem;
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int *values = alsa_get_elem_int_values(level_meter_elem);
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int meter_num = 0;
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// go through the port categories
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for (int i = 0; i < PC_COUNT; i++) {
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// go through the ports in that category
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for (int j = 0; j < card->routing_out_count[i]; j++) {
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GtkWidget *meter = card->meters[meter_num];
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double value = 20 * log10(values[meter_num] / 4095.0);
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int int_value;
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if (value < -80)
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int_value = -80;
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else if (value > 0)
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int_value = 0;
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else
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int_value = round(value);
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gtk_dial_set_value(GTK_DIAL(meter), int_value);
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meter_num++;
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}
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}
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free(values);
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return 1;
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}
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static GtkWidget *add_count_label(GtkGrid *grid, int count) {
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char s[20];
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sprintf(s, "%d", count + 1);
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GtkWidget *l = gtk_label_new(s);
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gtk_grid_attach(grid, l, count + 1, 0, 1, 1);
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return l;
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}
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static struct alsa_elem *get_level_meter_elem(struct alsa_card *card) {
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GArray *elems = card->elems;
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for (int i = 0; i < elems->len; i++) {
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struct alsa_elem *elem = &g_array_index(elems, struct alsa_elem, i);
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if (!elem->card)
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continue;
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if (strcmp(elem->name, "Level Meter") == 0)
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return elem;
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}
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return NULL;
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}
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GtkWidget *create_levels_controls(struct alsa_card *card) {
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GtkWidget *levels_top = gtk_grid_new();
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GtkGrid *grid = GTK_GRID(levels_top);
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gtk_widget_set_margin(GTK_WIDGET(grid), 5);
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GtkWidget *count_labels[MAX_MUX_IN] = { NULL };
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int meter_num = 0;
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card->level_meter_elem = get_level_meter_elem(card);
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if (!card->level_meter_elem) {
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printf("Level Meter control not found\n");
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return NULL;
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}
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// go through the port categories
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for (int i = 0; i < PC_COUNT; i++) {
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GtkWidget *l = gtk_label_new(port_category_names[i]);
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gtk_widget_set_halign(l, GTK_ALIGN_END);
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// add the label
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gtk_grid_attach(GTK_GRID(grid), l, 0, i + 1, 1, 1);
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// go through the ports in that category
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for (int j = 0; j < card->routing_out_count[i]; j++) {
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// add a count label if that hasn't already been done
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if (!count_labels[j])
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count_labels[j] = add_count_label(grid, j);
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// create the meter widget and attach to the grid
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GtkWidget *meter = gtk_dial_new_with_range(-80, 0, 1);
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gtk_widget_set_sensitive(meter, FALSE);
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card->meters[meter_num++] = meter;
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gtk_grid_attach(GTK_GRID(grid), meter, j + 1, i + 1, 1, 1);
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}
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}
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int elem_count = card->level_meter_elem->count;
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if (meter_num != elem_count) {
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printf("meter_num is %d but elem count is %d\n", meter_num, elem_count);
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return NULL;
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}
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card->level_meter_elem->count = elem_count;
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card->meter_gsource_timer = g_timeout_add(50, update_levels_controls, card);
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return levels_top;
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}
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