added clear_sound_proc method to backend API (this requires all backends to be modified, but can't help it)

svn-id: r8409

1 files changed, 7 insertions, 0 deletions

diff --git a/common/system.h b/common/system.h
index d8c06d1ef0..68408a6a13 100644
--- a/common/system.h
+++ b/common/system.h
@@ -258,6 +258,13 @@ public:
 	 * @param format	the sample type format.
 	 */
 	virtual bool set_sound_proc(SoundProc *proc, void *param, SoundFormat format) = 0;
+	
+	/**
+	 * Remove any audio callback previously set via set_sound_proc, thus effectively
+	 * stopping all audio output immediately.
+	 * @see set_sound_proc
+	 */
+	virtual void clear_sound_proc() = 0;
 	//@}