From f715f38b08219621d20cdf32a3820bedbdcc1f01 Mon Sep 17 00:00:00 2001
From: Spoike <acceptthis@users.sourceforge.net>
Date: Sun, 3 Dec 2017 03:03:02 +0000
Subject: [PATCH] attempt to fix csqc's updatesound builtin - openal will no
 longer restart, and other devices will now loop properly (instead of muting).

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@5177 fc73d0e0-1445-4013-8a0c-d673dee63da5
---
 engine/client/snd_al.c  |  3 ++-
 engine/client/snd_dma.c | 25 +++++++++++--------------
 engine/client/snd_mix.c |  2 +-
 3 files changed, 14 insertions(+), 16 deletions(-)

diff --git a/engine/client/snd_al.c b/engine/client/snd_al.c
index 01139fd13..c9f440d37 100644
--- a/engine/client/snd_al.c
+++ b/engine/client/snd_al.c
@@ -929,7 +929,8 @@ static void OpenAL_ChannelUpdate(soundcardinfo_t *sc, channel_t *chan, unsigned
 		}
 
 	/*and start it up again*/
-		palSourcePlay(src);
+		if (schanged != 2)
+			palSourcePlay(src);
 	}
 
 	PrintALError("post start sound");
diff --git a/engine/client/snd_dma.c b/engine/client/snd_dma.c
index 413818c96..5b08b83a2 100644
--- a/engine/client/snd_dma.c
+++ b/engine/client/snd_dma.c
@@ -2781,14 +2781,14 @@ static void S_UpdateSoundCard(soundcardinfo_t *sc, qboolean updateonly, channel_
 	extern cvar_t cl_demospeed;
 	int chanupdatetype = true;
 
-	if (fvol < 0)
+	if (!sfx)
+		sfx = target_chan->sfx;
+
+	if (fvol < 0 || !sfx)
 	{	//stopsound, apparently.
 		target_chan->sfx = NULL;
 		return;
 	}
-	
-	if (!sfx)
-		sfx = target_chan->sfx;
 
 	if (ratemul <= 0)
 		ratemul = 1;
@@ -2798,6 +2798,8 @@ static void S_UpdateSoundCard(soundcardinfo_t *sc, qboolean updateonly, channel_
 	vol = fvol*255;
 
 // spatialize
+	if (target_chan->sfx != sfx)
+		chanupdatetype = true;
 	memset (target_chan, 0, sizeof(*target_chan));
 	if (!origin)
 	{
@@ -2831,19 +2833,14 @@ static void S_UpdateSoundCard(soundcardinfo_t *sc, qboolean updateonly, channel_
 		return;		// not audible at all
 	}
 
-	if (sfx)
+	if (!S_LoadSound (sfx))
 	{
-		if (!S_LoadSound (sfx))
-		{
-			target_chan->sfx = NULL;
-			return;		// couldn't load the sound's data
-		}
-
-		if (target_chan->sfx != sfx)
-			chanupdatetype = true;
-		target_chan->sfx = sfx;
+		target_chan->sfx = NULL;
+		return;		// couldn't load the sound's data
 	}
 
+	target_chan->sfx = sfx;
+
 	if (updateonly && sc->ChannelUpdate)
 	{
 		chanupdatetype = 2;
diff --git a/engine/client/snd_mix.c b/engine/client/snd_mix.c
index 454dbae73..2e57c36d1 100644
--- a/engine/client/snd_mix.c
+++ b/engine/client/snd_mix.c
@@ -278,7 +278,7 @@ void S_PaintChannels(soundcardinfo_t *sc, int endtime)
 					avail = scache->length;
 					if (avail > maxlen)
 						avail = snd_speed*10;
-					avail = (((int)(scache->soundoffset + avail)<<PITCHSHIFT) - ch->pos) / ch->rate;
+					avail = (((int)(scache->soundoffset + avail)<<PITCHSHIFT) - ch->pos + (ch->rate-1)) / ch->rate;
 				}
 				// mix the smaller of how much is available or the time left
 				count = min(avail, end - ltime);