From 724a2d2514578297a7fe21dc4c17a7b51a25758d Mon Sep 17 00:00:00 2001
From: Andree Buschmann <AndreeBuschmann@t-online.de>
Date: Fri, 12 Aug 2011 21:36:29 +0000
Subject: 6th part of FS#12176. Reduce memory consumption of libgme emulators
 to allow enabling of NSF and SGC codecs for low memory targets. The main
 lookup table only requires byte precision and can be used by 2413 and 8950
 emulators. Update the manual accordingly.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30283 a1c6a512-1295-4272-9138-f99709370657
---
 apps/codecs/SOURCES              |  2 +-
 apps/codecs/libgme/emu2413.c     |  2 +-
 apps/codecs/libgme/emu8950.c     | 20 ++++++++++++++------
 manual/appendix/file_formats.tex |  6 +++---
 4 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/apps/codecs/SOURCES b/apps/codecs/SOURCES
index bbceae45b0..6862eeda8e 100644
--- a/apps/codecs/SOURCES
+++ b/apps/codecs/SOURCES
@@ -35,9 +35,9 @@ wmapro.c
 ay.c
 gbs.c
 hes.c
-#if MEMORYSIZE > 2
 nsf.c
 sgc.c
+#if MEMORYSIZE > 2
 vgm.c
 kss.c
 #endif
diff --git a/apps/codecs/libgme/emu2413.c b/apps/codecs/libgme/emu2413.c
index e7acebc63f..def6d60b7f 100644
--- a/apps/codecs/libgme/emu2413.c
+++ b/apps/codecs/libgme/emu2413.c
@@ -210,7 +210,7 @@ static e_uint32 dphaseARTable[16][16];
 static e_uint32 dphaseDRTable[16][16];
 
 /* KSL + TL Table */
-static e_uint32 tllTable[16][8][1 << TL_BITS][4];
+e_uint8 tllTable[16][8][1 << TL_BITS][4];
 static e_int32 rksTable[2][8][2];
 
 /* We may not have too much SRAM in rockbox */
diff --git a/apps/codecs/libgme/emu8950.c b/apps/codecs/libgme/emu8950.c
index 0e9c4864eb..e75bf66d64 100644
--- a/apps/codecs/libgme/emu8950.c
+++ b/apps/codecs/libgme/emu8950.c
@@ -36,7 +36,12 @@ static unsigned int dphaseARTable[16][16];
 /** Phase incr table for Decay and Release. */
 static unsigned int dphaseDRTable[16][16];
 /** KSL + TL Table. */
-static int tllTable[16][8][1<<TL_BITS][4];
+#if !defined(ROCKBOX)
+static unsigned char tllTable[16][8][1<<TL_BITS][4];
+#else
+/* Use the table calculated in emu2413 which is identical. */
+extern unsigned char tllTable[16][8][1<<TL_BITS][4];
+#endif
 static int rksTable[2][8][2];
 /** Since we wont change clock rate in rockbox we can
     skip this table */
@@ -193,6 +198,7 @@ static void makeDphaseTable(int sampleRate, int clockRate)
 }
 #endif
 
+#if !defined(ROCKBOX)
 static void makeTllTable(void)
 {
 	#define dB2(x) (int)((x)*2)
@@ -209,17 +215,17 @@ static void makeTllTable(void)
 			for (TL=0; TL<64; TL++)
 				for (KL=0; KL<4; KL++) {
 					if (KL==0) {
-						tllTable[fnum][block][TL][KL] = ALIGN(TL, TL_STEP, EG_STEP);
+						tllTable[fnum][block][TL][KL] = (ALIGN(TL, TL_STEP, EG_STEP) ) >> 1;
 					} else {
 						int tmp = kltable[fnum] - dB2(3.000) * (7 - block);
 						if (tmp <= 0)
-							tllTable[fnum][block][TL][KL] = ALIGN(TL, TL_STEP, EG_STEP);
+							tllTable[fnum][block][TL][KL] = (ALIGN(TL, TL_STEP, EG_STEP) ) >> 1;
 						else 
-							tllTable[fnum][block][TL][KL] = (int)((tmp>>(3-KL))/EG_STEP) + ALIGN(TL, TL_STEP, EG_STEP);
+							tllTable[fnum][block][TL][KL] = ((int)((tmp>>(3-KL))/EG_STEP) + ALIGN(TL, TL_STEP, EG_STEP) ) >> 1;
 					}
 				}
 }
-
+#endif
 
 // Rate Table for Attack 
 static void makeDphaseARTable(int sampleRate, int clockRate)
@@ -313,7 +319,7 @@ static inline void slotUpdatePG(struct Slot* slot)
 
 static inline void slotUpdateTLL(struct Slot* slot)
 {
-	slot->tll = tllTable[slot->fnum>>6][slot->block][slot->patch.TL][slot->patch.KL];
+	slot->tll = (int)(tllTable[slot->fnum>>6][slot->block][slot->patch.TL][slot->patch.KL]) << 1;
 }
 
 static inline void slotUpdateRKS(struct Slot* slot)
@@ -457,7 +463,9 @@ void OPL_init(struct Y8950* this, byte* ramBank, int sampleRam)
 	
 	makeAdjustTable();
 	makeDB2LinTable();
+#if !defined(ROCKBOX)
 	makeTllTable();
+#endif
 	makeRksTable();
 	makeSinTable();
 
diff --git a/manual/appendix/file_formats.tex b/manual/appendix/file_formats.tex
index a54debb9ca..f75bd53786 100644
--- a/manual/appendix/file_formats.tex
+++ b/manual/appendix/file_formats.tex
@@ -222,11 +222,12 @@
     \nopt{clipv1,c200v2}{
     MSX Konami Sound System
         & \fname{.kss}
-        & Progress bar and seek use subtracks instead of seconds.\\
+        & Progress bar and seek use subtracks instead of seconds.\\}
     SMS/GG/CV Sound Format
         & \fname{.sgc}
         & Supports Sega Master System and Game Gear Sound Format. 
           Progress bar and seek use subtracks instead of seconds.\\
+    \nopt{clipv1,c200v2}{
     Video Game Music Format
         & \fname{.vgm}
         & \\
@@ -236,10 +237,9 @@
     MOD
         & \fname{.mod} 
         & \\
-    \nopt{clipv1,c200v2}{
     NES Sound Format
         & \fname{.nsf}, \fname{.nsfe} 
-        & Progress bar and seek use subtracks instead of seconds.\\}
+        & Progress bar and seek use subtracks instead of seconds.\\
     Atari SAP
         & \fname{.sap} 
         & \\
-- 
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