Add support for config reset

src/device-reset-config.c

@@ -0,0 +1,87 @@
+// SPDX-FileCopyrightText: 2024 Geoffrey D. Bennett <g@b4.vu>
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include <gtk/gtk.h>
+#include "device-reset-config.h"
+#include "scarlett2.h"
+#include "scarlett2-ioctls.h"
+#include "window-modal.h"
+
+static gpointer update_progress(
+  struct modal_data *modal_data,
+  char              *text,
+  int                progress
+) {
+  struct progress_data *progress_data = g_new0(struct progress_data, 1);
+  progress_data->modal_data = modal_data;
+  progress_data->text = text;
+  progress_data->progress = progress;
+
+  g_main_context_invoke(NULL, modal_update_progress, progress_data);
+  return NULL;
+}
+
+#define fail(msg) { \
+  if (hwdep) \
+    scarlett2_close(hwdep); \
+  return update_progress(modal_data, msg, -1); \
+}
+
+#define failsndmsg(msg) g_strdup_printf(msg, snd_strerror(err))
+
+gpointer reset_config_thread(gpointer user_data) {
+  struct modal_data *modal_data = user_data;
+
+  update_progress(modal_data, g_strdup("Resetting configuration..."), 0);
+
+  snd_hwdep_t *hwdep;
+
+  int err = scarlett2_open_card(modal_data->card->device, &hwdep);
+  if (err < 0)
+    fail(failsndmsg("Unable to open hwdep interface: %s"));
+
+  err = scarlett2_erase_config(hwdep);
+  if (err < 0)
+    fail(failsndmsg("Unable to reset configuration: %s"));
+
+  while (1) {
+    g_usleep(50000);
+
+    err = scarlett2_get_erase_progress(hwdep);
+    if (err < 0)
+      fail(failsndmsg("Unable to get erase progress: %s"));
+    if (err == 255)
+      break;
+
+    update_progress(modal_data, NULL, err);
+  }
+
+  g_main_context_invoke(NULL, modal_start_reboot_progress, modal_data);
+  scarlett2_reboot(hwdep);
+  scarlett2_close(hwdep);
+
+  return NULL;
+}
+
+static void join_thread(gpointer thread) {
+  g_thread_join(thread);
+}
+
+static void reset_config_yes_callback(struct modal_data *modal_data) {
+  GThread *thread = g_thread_new(
+    "reset_config_thread", reset_config_thread, modal_data
+  );
+  g_object_set_data_full(
+    G_OBJECT(modal_data->button_box), "thread", thread, join_thread
+  );
+}
+
+void create_reset_config_window(GtkWidget *w, struct alsa_card *card) {
+  create_modal_window(
+    w, card,
+    "Confirm Reset Configuration",
+    "Resetting Configuration",
+    "Are you sure you want to reset the configuration?",
+    reset_config_yes_callback
+  );
+}