delta encoding table

2 files changed, 19 insertions, 18 deletions

diff --git a/asm/m4a_1.s b/asm/m4a_1.s
index 2b548cacc..9e1a34f84 100644
--- a/asm/m4a_1.s
+++ b/asm/m4a_1.s
@@ -679,7 +679,7 @@ sub_81DD520:
 	add r2, r2, r1
 	add r2, r2, 0x10
 	ldr r5, =0x030007b8
-	ldr r6, =gUnknown_0842F9F4
+	ldr r6, =gDeltaEncodingTable
 	mov r7, 0x40
 	ldrb lr, [r2], 1
 	strb lr, [r5], 1
diff --git a/src/m4a_tables.c b/src/m4a_tables.c
index f557fb073..c673f265c 100644
--- a/src/m4a_tables.c
+++ b/src/m4a_tables.c
@@ -43,24 +43,25 @@ void * const gMPlayJumpTableTemplate[] =
     SoundMainBTM,
 };
 
-const u8 gUnknown_0842F9F4[] =
+// This is a table of deltas between sample values in compressed PCM data.
+const s8 gDeltaEncodingTable[] =
 {
-    0,
-    1,
-    4,
-    9,
-    16,
-    25,
-    36,
-    49,
-    192,
-    207,
-    220,
-    231,
-    240,
-    247,
-    252,
-    255,
+      0,
+      1,
+      4,
+      9,
+     16,
+     25,
+     36,
+     49,
+    -64,
+    -49,
+    -36,
+    -25,
+    -16,
+     -9,
+     -4,
+     -1,
 };
 
 const u8 gScaleTable[] =