output/Client: new interface to replace direct access to class PlayerControl

1 files changed, 47 insertions, 0 deletions

diff --git a/src/output/Client.hxx b/src/output/Client.hxx
new file mode 100644
index 000000000..facace4be
--- /dev/null
+++ b/src/output/Client.hxx
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2003-2016 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_OUTPUT_CLIENT_HXX
+#define MPD_OUTPUT_CLIENT_HXX
+
+#include "check.h"
+
+/**
+ * An interface between the #AudioOutput and the #Player.
+ */
+class AudioOutputClient {
+public:
+	/**
+	 * Notify the client that we have consumed a few chunks.  This
+	 * is called from within the output thread.  The client may
+	 * perform actions to refill the #MusicPipe.
+	 */
+	virtual void ChunksConsumed() = 0;
+
+	/**
+	 * The #AudioOutput has modified the "enabled" flag, and the
+	 * client shall make the #AudioOutput apply this new setting.
+	 * This is called from any thread, one which can't send an
+	 * AudioOutput::Command to the output thread; only the client
+	 * can do that safely.
+	 */
+	virtual void ApplyEnabled() = 0;
+};
+
+#endif