From 3d69ae9995987ce408c15c5f7f1d34d09a1aa5bb Mon Sep 17 00:00:00 2001
From: Zack Middleton <zturtleman@gmail.com>
Date: Fri, 16 Aug 2013 15:29:12 -0500
Subject: [PATCH] Fix OpenAL music stop issues using stream stop code

S_AL_StopBackgroundTrack would sometimes generate AL errors.
S_AL_MusicSourceFree needs to kill source or next track may have short looping buffer.
---
 code/client/snd_openal.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/code/client/snd_openal.c b/code/client/snd_openal.c
index 8376ecfa..83eb541e 100644
--- a/code/client/snd_openal.c
+++ b/code/client/snd_openal.c
@@ -1876,6 +1876,7 @@ static void S_AL_MusicSourceFree( void )
 {
 	// Release the output musicSource
 	S_AL_SrcUnlock(musicSourceHandle);
+	S_AL_SrcKill(musicSourceHandle);
 	musicSource = 0;
 	musicSourceHandle = -1;
 }
@@ -1908,17 +1909,22 @@ S_AL_StopBackgroundTrack
 static
 void S_AL_StopBackgroundTrack( void )
 {
+	int		numBuffers;
+
 	if(!musicPlaying)
 		return;
 
 	// Stop playing
 	qalSourceStop(musicSource);
 
-	// De-queue the musicBuffers
-	qalSourceUnqueueBuffers(musicSource, NUM_MUSIC_BUFFERS, musicBuffers);
-
-	// Destroy the musicBuffers
-	qalDeleteBuffers(NUM_MUSIC_BUFFERS, musicBuffers);
+	// Un-queue any buffers, and delete them
+	qalGetSourcei( musicSource, AL_BUFFERS_PROCESSED, &numBuffers );
+	while( numBuffers-- )
+	{
+		ALuint buffer;
+		qalSourceUnqueueBuffers(musicSource, 1, &buffer);
+		qalDeleteBuffers(1, &buffer);
+	}
 
 	// Free the musicSource
 	S_AL_MusicSourceFree();