From 71dd0d0269d37facfd45ddb873a44780230c251d Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@zdoom.fake>
Date: Thu, 18 Sep 2008 21:00:12 +0000
Subject: [PATCH] - another #include fix for Linux. - Added a 'logarithmic'
 parameter to S_GetRolloff.

SVN r1235 (trunk)
---
 src/s_sound.cpp         | 22 ++++++++++++++++++----
 src/sdl/i_main.cpp      |  3 +++
 src/sound/fmodsound.cpp |  4 ++--
 src/sound/i_sound.h     |  2 +-
 4 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/src/s_sound.cpp b/src/s_sound.cpp
index 31f2ca2519..665f3f6d3c 100644
--- a/src/s_sound.cpp
+++ b/src/s_sound.cpp
@@ -1778,7 +1778,7 @@ static void S_SetListener(SoundListener &listener, AActor *listenactor)
 //
 //==========================================================================
 
-float S_GetRolloff(FRolloffInfo *rolloff, float distance)
+float S_GetRolloff(FRolloffInfo *rolloff, float distance, bool logarithmic)
 {
 	if (rolloff == NULL)
 	{
@@ -1803,13 +1803,27 @@ float S_GetRolloff(FRolloffInfo *rolloff, float distance)
 	{
 		volume = S_SoundCurve[int(S_SoundCurveSize * (1 - volume))] / 127.f;
 	}
-	if (rolloff->RolloffType == ROLLOFF_Linear)
+	if (logarithmic)
 	{
-		return volume;
+		if (rolloff->RolloffType == ROLLOFF_Linear)
+		{
+			return volume;
+		}
+		else
+		{
+			return float((pow(10.f, volume) - 1.) / 9.);
+		}
 	}
 	else
 	{
-		return (powf(10.f, volume) - 1.f) / 9.f;
+		if (rolloff->RolloffType == ROLLOFF_Linear)
+		{
+			return float(log10(9. * volume + 1.));
+		}
+		else
+		{
+			return volume;
+		}
 	}
 }
 
diff --git a/src/sdl/i_main.cpp b/src/sdl/i_main.cpp
index f49c9bbd16..2f9d483372 100644
--- a/src/sdl/i_main.cpp
+++ b/src/sdl/i_main.cpp
@@ -54,6 +54,9 @@
 #include "errors.h"
 #include "version.h"
 #include "w_wad.h"
+#include "g_level.h"
+#include "r_state.h"
+#include "cmdlib.h"
 
 // MACROS ------------------------------------------------------------------
 
diff --git a/src/sound/fmodsound.cpp b/src/sound/fmodsound.cpp
index 6179b7bebc..9946edafa9 100644
--- a/src/sound/fmodsound.cpp
+++ b/src/sound/fmodsound.cpp
@@ -2040,11 +2040,11 @@ float F_CALLBACK FMODSoundRenderer::RolloffCallback(FMOD_CHANNEL *channel, float
 
 	if (GRolloff != NULL)
 	{
-		return S_GetRolloff(GRolloff, distance * GDistScale);
+		return S_GetRolloff(GRolloff, distance * GDistScale, true);
 	}
 	else if (chan->getUserData((void **)&schan) == FMOD_OK && schan != NULL)
 	{
-		return S_GetRolloff(&schan->Rolloff, distance * schan->DistanceScale);
+		return S_GetRolloff(&schan->Rolloff, distance * schan->DistanceScale, true);
 	}
 	else
 	{
diff --git a/src/sound/i_sound.h b/src/sound/i_sound.h
index d7c071290e..6844a75452 100644
--- a/src/sound/i_sound.h
+++ b/src/sound/i_sound.h
@@ -141,7 +141,7 @@ void I_InitSound ();
 void I_ShutdownSound ();
 
 void S_ChannelEnded(FISoundChannel *schan);
-float S_GetRolloff(FRolloffInfo *rolloff, float distance);
+float S_GetRolloff(FRolloffInfo *rolloff, float distance, bool logarithmic);
 FISoundChannel *S_GetChannel(void *syschan);
 
 extern ReverbContainer *DefaultEnvironments[26];