audio: moved state file code to output_state.c

src/output_state.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+/*
+ * Saving and loading the audio output states to/from the state file.
+ *
+ */
+
+#include "output_state.h"
+#include "output_internal.h"
+#include "audio.h"
+
+#include <glib.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#define AUDIO_DEVICE_STATE "audio_device_state:"
+
+void
+saveAudioDevicesState(FILE *fp)
+{
+	unsigned n = audio_output_count();
+
+	assert(n > 0);
+
+	for (unsigned i = 0; i < n; ++i) {
+		const struct audio_output *ao = audio_output_get(i);
+
+		fprintf(fp, AUDIO_DEVICE_STATE "%d:%s\n",
+			ao->enabled, ao->name);
+	}
+}
+
+void
+readAudioDevicesState(FILE *fp)
+{
+	char buffer[1024];
+
+	while (fgets(buffer, sizeof(buffer), fp)) {
+		char *c, *name;
+		struct audio_output *ao;
+
+		g_strchomp(buffer);
+
+		if (!g_str_has_prefix(buffer, AUDIO_DEVICE_STATE))
+			continue;
+
+		c = strchr(buffer, ':');
+		if (!c || !(++c))
+			goto errline;
+
+		name = strchr(c, ':');
+		if (!name || !(++name))
+			goto errline;
+
+		ao = audio_output_find(name);
+		if (ao != NULL && atoi(c) == 0)
+			ao->enabled = false;
+
+		continue;
+errline:
+		/* nonfatal */
+		g_warning("invalid line in state_file: %s\n", buffer);
+	}
+}