143 lines
4.2 KiB
C
143 lines
4.2 KiB
C
// SPDX-FileCopyrightText: 2022-2024 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 "gtkhelper.h"
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#include "stringhelper.h"
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#include "widget-gain.h"
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#include "window-mixer.h"
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static struct routing_snk *get_mixer_r_snk(
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struct alsa_card *card,
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int input_num
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) {
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for (int i = 0; i < card->routing_snks->len; i++) {
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struct routing_snk *r_snk = &g_array_index(
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card->routing_snks, struct routing_snk, i
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);
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if (r_snk->port_category != PC_MIX)
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continue;
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if (r_snk->elem->lr_num == input_num)
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return r_snk;
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}
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return NULL;
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}
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GtkWidget *create_mixer_controls(struct alsa_card *card) {
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GtkWidget *top = gtk_frame_new(NULL);
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gtk_widget_add_css_class(top, "window-frame");
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GtkWidget *mixer_top = gtk_grid_new();
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gtk_widget_add_css_class(mixer_top, "window-content");
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gtk_widget_add_css_class(mixer_top, "top-level-content");
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gtk_widget_add_css_class(mixer_top, "window-mixer");
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gtk_frame_set_child(GTK_FRAME(top), mixer_top);
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gtk_widget_set_halign(mixer_top, GTK_ALIGN_CENTER);
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gtk_widget_set_valign(mixer_top, GTK_ALIGN_CENTER);
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gtk_grid_set_column_homogeneous(GTK_GRID(mixer_top), TRUE);
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GArray *elems = card->elems;
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// create the Mix X labels on the left and right of the grid
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for (int i = 0; i < card->routing_in_count[PC_MIX]; i++) {
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char name[10];
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snprintf(name, 10, "Mix %c", i + 'A');
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GtkWidget *l_left = gtk_label_new(name);
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gtk_grid_attach(
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GTK_GRID(mixer_top), l_left,
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0, i + 2, 1, 1
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);
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GtkWidget *l_right = gtk_label_new(name);
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gtk_grid_attach(
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GTK_GRID(mixer_top), l_right,
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card->routing_out_count[PC_MIX] + 1, i + 2, 1, 1
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);
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}
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// go through each element and create the mixer
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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 no card entry, it's an empty slot
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if (!elem->card)
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continue;
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// looking for "Mix X Input Y Playback Volume" elements
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if (strncmp(elem->name, "Mix ", 4) != 0)
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continue;
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if (!strstr(elem->name, "Playback Volume"))
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continue;
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// extract the mix number and input number from the element name
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int mix_num = elem->name[4] - 'A';
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int input_num = get_num_from_string(elem->name) - 1;
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if (mix_num >= MAX_MIX_OUT) {
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printf("mix_num %d >= MAX_MIX_OUT %d\n", mix_num, MAX_MIX_OUT);
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continue;
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}
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// create the gain control and attach to the grid
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GtkWidget *w = make_gain_alsa_elem(elem, 1, WIDGET_GAIN_TAPER_LOG, 0);
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gtk_grid_attach(GTK_GRID(mixer_top), w, input_num + 1, mix_num + 2, 1, 1);
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// look up the r_snk entry for the mixer input number
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struct routing_snk *r_snk = get_mixer_r_snk(card, input_num + 1);
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if (!r_snk) {
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printf("missing mixer input %d\n", input_num);
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continue;
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}
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// lookup the top label for the mixer input
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GtkWidget *l_top = r_snk->mixer_label_top;
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// if the top label doesn't already exist the bottom doesn't
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// either; create them both and attach to the grid
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if (!l_top) {
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l_top = r_snk->mixer_label_top = gtk_label_new("");
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GtkWidget *l_bottom = r_snk->mixer_label_bottom = gtk_label_new("");
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gtk_grid_attach(
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GTK_GRID(mixer_top), l_top,
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input_num, (input_num + 1) % 2, 3, 1
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);
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gtk_grid_attach(
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GTK_GRID(mixer_top), l_bottom,
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input_num, card->routing_in_count[PC_MIX] + input_num % 2 + 2, 3, 1
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);
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}
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}
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update_mixer_labels(card);
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return top;
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}
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void update_mixer_labels(struct alsa_card *card) {
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for (int i = 0; i < card->routing_snks->len; i++) {
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struct routing_snk *r_snk = &g_array_index(
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card->routing_snks, struct routing_snk, i
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);
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if (r_snk->port_category != PC_MIX)
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continue;
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struct alsa_elem *elem = r_snk->elem;
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int routing_src_idx = alsa_get_elem_value(elem);
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struct routing_src *r_src = &g_array_index(
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card->routing_srcs, struct routing_src, routing_src_idx
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);
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if (r_snk->mixer_label_top) {
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gtk_label_set_text(GTK_LABEL(r_snk->mixer_label_top), r_src->name);
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gtk_label_set_text(GTK_LABEL(r_snk->mixer_label_bottom), r_src->name);
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}
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}
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}
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