From 6e975586e08dd8ab2d2aa3bfc04a71013d09db5d Mon Sep 17 00:00:00 2001
From: Ricardo Wurmus <rekado@elephly.net>
Date: Sun, 1 Apr 2018 14:19:05 +0200
Subject: env/ad m: Use less space.

---
 objects/env/ad m.axo | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

(limited to 'objects/env/ad m.axo')

diff --git a/objects/env/ad m.axo b/objects/env/ad m.axo
index 9ae76f1..fd12bf9 100644
--- a/objects/env/ad m.axo	
+++ b/objects/env/ad m.axo	
@@ -19,24 +19,27 @@
       </params>
       <attribs/>
       <code.declaration><![CDATA[
+// upper nibble: "triggered", lower nibble: stage (0x00 for decay, 0x0F for attack)
 int8_t stage;
-int ntrig;
 int32_t val;
 ]]></code.declaration>
       <code.init><![CDATA[
-ntrig = 0;
+stage = 0x00;
 val = 0;
 ]]></code.init>
       <code.krate><![CDATA[
-if ((inlet_trig>0) && !ntrig) {
-   ntrig = 1;
-   stage = 1;
+
+// If trigger and not yet triggered
+if ((inlet_trig>0) && !((stage & 0xF0)>>4)) {
+   // set "triggered" and "attack"
+   stage = 0xFF;
 } else if (!(inlet_trig>0)) {
-   ntrig = 0;
+   // set "not triggered"
+   stage &= 0x0F;
 }
 
 // decay
-if (stage == 0) {
+if ((stage & 0x0F) == 0) {
    val = ___SMMLA(val,(-1<<26)+(param_d>>1)+(inlet_d>>1),val);
 
 // attack
@@ -51,7 +54,7 @@ if (stage == 0) {
    // switch to decay phase at max
    if (val > 0x07FFFFFF) {
       val = 0x07FFFFFF;
-      stage = 0;
+      stage &= 0xF0;
    }
 }
 outlet_env = val;
-- 
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