static void
state_file_write(void)
{
FILE *fp;
assert(state_file_path != NULL);
g_debug("Saving state file %s", state_file_path);
fp = fopen(state_file_path, "w");
if (G_UNLIKELY(!fp)) {
g_warning("failed to create %s: %s",
state_file_path, strerror(errno));
return;
}
save_sw_volume_state(fp);
audio_output_state_save(fp);
playlist_state_save(fp, &g_playlist);
fclose(fp);
prev_volume_version = sw_volume_state_get_hash();
prev_output_version = audio_output_state_get_version();
prev_playlist_version = playlist_state_get_hash(&g_playlist);
}
/**
* This function is called every 5 minutes by the GLib main loop, and
* saves the state file.
*/
static gboolean
timer_save_state_file(G_GNUC_UNUSED gpointer data)
{
if (prev_volume_version == sw_volume_state_get_hash() &&
prev_output_version == audio_output_state_get_version() &&
prev_playlist_version == playlist_state_get_hash(&g_playlist))
/* nothing has changed - don't save the state file,
don't spin up the hard disk */
return true;
state_file_write();
return true;
}
/**
* This function is called every 5 minutes by the GLib main loop, and
* saves the state file.
*/
static gboolean
timer_save_state_file(gpointer data)
{
struct player_control *pc = data;
if (prev_volume_version == sw_volume_state_get_hash() &&
prev_output_version == audio_output_state_get_version() &&
prev_playlist_version == playlist_state_get_hash(&g_playlist, pc))
/* nothing has changed - don't save the state file,
don't spin up the hard disk */
return true;
state_file_write(pc);
return true;
}
static void
state_file_read(struct player_control *pc)
{
FILE *fp;
bool success;
assert(state_file_path != NULL);
g_debug("Loading state file %s", state_file_path);
fp = fopen(state_file_path, "r");
if (G_UNLIKELY(!fp)) {
g_warning("failed to open %s: %s",
state_file_path, strerror(errno));
return;
}
GString *buffer = g_string_sized_new(1024);
const char *line;
while ((line = read_text_line(fp, buffer)) != NULL) {
success = read_sw_volume_state(line) ||
audio_output_state_read(line) ||
playlist_state_restore(line, fp, buffer,
&g_playlist, pc);
if (!success)
g_warning("Unrecognized line in state file: %s", line);
}
fclose(fp);
prev_volume_version = sw_volume_state_get_hash();
prev_output_version = audio_output_state_get_version();
prev_playlist_version = playlist_state_get_hash(&g_playlist, pc);
g_string_free(buffer, true);
}