add RageSoundManager::AttenuateBuf

2003-10-22 03:39:52 +00:00
parent b5656d7ec9
commit 51d60e1db1
2 changed files with 11 additions and 0 deletions
@@ -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;
@@ -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. */