From 94d9d152b63819d665d8c00075381110ce0154f5 Mon Sep 17 00:00:00 2001
From: Stepan Moskovchenko <stevenm@rockbox.org>
Date: Tue, 3 Oct 2006 23:27:44 +0000
Subject: [PATCH] More ADSR related voodoo. Hopefully will get to patch
 prescaler soon.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11118 a1c6a512-1295-4272-9138-f99709370657
---
 apps/plugins/midi/synth.c | 30 ++++++++++++++----------------
 1 file changed, 14 insertions(+), 16 deletions(-)

diff --git a/apps/plugins/midi/synth.c b/apps/plugins/midi/synth.c
index 95bb88f8c6..f65a062c43 100644
--- a/apps/plugins/midi/synth.c
+++ b/apps/plugins/midi/synth.c
@@ -238,7 +238,7 @@ void setPoint(struct SynthObject * so, int pt)
      *
      * Or just move the 1 up one line to optimize a tiny bit.
      */
-     so->curRate = so->curRate << 1;
+    /* so->curRate = so->curRate << 1; */
 
 
     so->targetOffset = so->wf->envOffset[pt]<<(20);
@@ -251,7 +251,6 @@ inline void stopVoice(struct SynthObject * so)
 {
     if(so->state == STATE_RAMPDOWN)
         return;
-    //    so->isUsed = 0;
     so->state = STATE_RAMPDOWN;
     so->decay = 0;
 }
@@ -285,7 +284,7 @@ signed short int synthVoice(struct SynthObject * so)
     }
 
 
-    cpShifted = so->cp >> FRACTSIZE;   //Was 10
+    cpShifted = so->cp >> FRACTSIZE;
 
 
 
@@ -296,7 +295,7 @@ signed short int synthVoice(struct SynthObject * so)
     {
         if(wf->mode & LOOP_REVERSE)
         {
-            so->cp = (wf->endLoop)<<FRACTSIZE; //Was 10
+            so->cp = (wf->endLoop)<<FRACTSIZE;
             cpShifted = wf->endLoop;
             s2=getSample((cpShifted), wf);
         }
@@ -312,7 +311,7 @@ signed short int synthVoice(struct SynthObject * so)
         so->loopState = STATE_LOOPING;
         if((wf->mode & (24)) == 0)
         {
-            so->cp = (wf->startLoop)<<FRACTSIZE; //Was 10
+            so->cp = (wf->startLoop)<<FRACTSIZE;
             cpShifted = wf->startLoop;
             s2=getSample((cpShifted), wf);
         }
@@ -331,8 +330,6 @@ signed short int synthVoice(struct SynthObject * so)
 
         cpShifted = so->cp >> FRACTSIZE;
         s2 = getSample((cpShifted)+1, wf);
-      //      if((wf->mode & (28)))
-        //        printf("OV1 (loop 2)");
         stopVoice(so);
     }
 
@@ -340,14 +337,14 @@ signed short int synthVoice(struct SynthObject * so)
     /* Better, working, linear interpolation    */
     s1=getSample((cpShifted), wf);
 
-    s = s1 + ((signed)((s2 - s1) * (so->cp & ((1<<FRACTSIZE)-1)))>>FRACTSIZE);   //Was 10
+    s = s1 + ((signed)((s2 - s1) * (so->cp & ((1<<FRACTSIZE)-1)))>>FRACTSIZE);
 
-/* ADSR COMMENT WOULD GO FROM HERE.........*/
 
     if(so->curRate == 0)
     {
         stopVoice(so);
-//         printf("OV2");
+//        so->isUsed = 0;
+
     }
 
     if(so->ch != 9 && so->state != STATE_RAMPDOWN) /* Stupid ADSR code... and don't do ADSR for drums */
@@ -358,11 +355,12 @@ signed short int synthVoice(struct SynthObject * so)
             if(so -> curOffset > so->targetOffset && so->curPoint != 2)
             {
                 if(so->curPoint != 5)
+                {
                     setPoint(so, so->curPoint+1);
+                }
                 else
                 {
                     stopVoice(so);
-//                     printf("OV3");
                 }
             }
         } else
@@ -372,11 +370,12 @@ signed short int synthVoice(struct SynthObject * so)
             {
 
                 if(so->curPoint != 5)
+                {
                     setPoint(so, so->curPoint+1);
+                }
                 else
                 {
                     stopVoice(so);
-//                     printf("OV4");
                 }
 
             }
@@ -385,9 +384,10 @@ signed short int synthVoice(struct SynthObject * so)
 
     if(so->curOffset < 0)
     {
-    	stopVoice(so);
-//         printf("OV5");
+        so->curOffset = so->targetOffset;
+        stopVoice(so);
     }
+
     s = (s * (so->curOffset >> 22) >> 8);
 
 
@@ -400,8 +400,6 @@ signed short int synthVoice(struct SynthObject * so)
     }
 
 
-/* ............. TO HERE */
-
     /* Scaling by channel volume and note volume is done in sequencer.c */
     /* That saves us some multiplication and pointer operations         */
     return s*so->volscale>>14;