audio: moved code to output_command.c

The output_command library provides a command interface to the audio
outputs.  It assumes the input comes from an untrusted source
(i.e. the client) and verifies all parameters.

src/output_command.c

@@ -0,0 +1,62 @@
+/*
+ * 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
+ */
+
+/*
+ * Glue functions for controlling the audio outputs over the MPD
+ * protocol.  These functions perform extra validation on all
+ * parameters, because they might be from an untrusted source.
+ *
+ */
+
+#include "output_command.h"
+#include "output_all.h"
+#include "output_internal.h"
+#include "idle.h"
+
+bool
+audio_output_enable_index(unsigned idx)
+{
+	struct audio_output *ao;
+
+	if (idx >= audio_output_count())
+		return false;
+
+	ao = audio_output_get(idx);
+
+	ao->reopen_after = 0;
+	ao->enabled = true;
+	idle_add(IDLE_OUTPUT);
+
+	return true;
+}
+
+bool
+audio_output_disable_index(unsigned idx)
+{
+	struct audio_output *ao;
+
+	if (idx >= audio_output_count())
+		return false;
+
+	ao = audio_output_get(idx);
+
+	ao->enabled = false;
+	idle_add(IDLE_OUTPUT);
+
+	return true;
+}