From 51d60e1db1c44589bc2ee0ce5cb51f6edc4c36d9 Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Wed, 22 Oct 2003 03:39:52 +0000
Subject: [PATCH] add RageSoundManager::AttenuateBuf

---
 stepmania/src/RageSoundManager.cpp | 10 ++++++++++
 stepmania/src/RageSoundManager.h   |  1 +
 2 files changed, 11 insertions(+)

diff --git a/stepmania/src/RageSoundManager.cpp b/stepmania/src/RageSoundManager.cpp
index 112bf853cd..819cbc61e8 100644
--- a/stepmania/src/RageSoundManager.cpp
+++ b/stepmania/src/RageSoundManager.cpp
@@ -262,6 +262,16 @@ void RageSoundManager::SetPrefs(float MixVol)
 	driver->VolumeChanged();
 }
 
+void RageSoundManager::AttenuateBuf( Sint16 *buf, int samples, float vol )
+{
+	while( samples-- )
+	{
+		*buf = Sint16( (*buf) * vol );
+		++buf;
+	}
+}
+
+	
 SoundMixBuffer::SoundMixBuffer()
 {
 	bufsize = used = 0;
diff --git a/stepmania/src/RageSoundManager.h b/stepmania/src/RageSoundManager.h
index 671022a3f8..204966a9d8 100644
--- a/stepmania/src/RageSoundManager.h
+++ b/stepmania/src/RageSoundManager.h
@@ -62,6 +62,7 @@ public:
 	set<RageSound *> all_sounds;
 
 	static void MixAudio(Sint16 *dst, const Sint16 *src, Uint32 len, float volume);
+	static void AttenuateBuf( Sint16 *buf, int samples, float vol );
 };
 
 /* This inputs and outputs 16-bit 44khz stereo input. */