From 80fdc1e39d864f05f271c8035715ab4c155a2002 Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@thinkpad.(none)>
Date: Sun, 9 Jan 2011 17:46:26 +0100
Subject: Improved note-compiler: optimizing output now works properly

Previously, output was always considered as non-const, even if is was
zero and without any controller-influence, because output had always
pfactor-influence. Now, a pfactor-influenced output which is constant
zero is considered as still constant, because pfactor*0 is always 0.
---
 note_compiler/parser.cpp | 28 ++++++++++++++++++++++++----
 note_compiler/programs.h |  1 +
 2 files changed, 25 insertions(+), 4 deletions(-)

(limited to 'note_compiler')

diff --git a/note_compiler/parser.cpp b/note_compiler/parser.cpp
index b15b981..c89ddd9 100644
--- a/note_compiler/parser.cpp
+++ b/note_compiler/parser.cpp
@@ -23,7 +23,8 @@ void init_oscs(int n_osc, oscillator_t *osc)
 		}
 		
 		osc[i].output=0;
-		osc[i].output_const=false; //TODO FINDMICH war true
+		osc[i].output_const=true;
+		osc[i].output_no_pfactor=false;
 		osc[i].waveform=0;
 		osc[i].waveform_const=true;
 		osc[i].factor=ONE;
@@ -369,7 +370,13 @@ program_t parse(string fn)
 								osc[ind].fm_strength_const[ind2]=false;
 								break;
 							case OUTPUT:
-								osc[ind].output_const=false; break;
+								if (state==4) // vel.-influence
+								{
+									if (isfloat(strval)) //is it a plain number, not a formula?
+										osc[ind].output_no_pfactor=true;
+								}
+								else
+									osc[ind].output_const=false; break;
 							case WAVEFORM:
 								osc[ind].waveform_const=false; break;
 							case FACTOR:
@@ -438,7 +445,7 @@ program_t parse(string fn)
 		}
 		
 		
-		//some optimizations
+		//some optimizations and checks
 		
 		for (int i=0;i<n_osc;i++)
 			if ((env[i].attack==0) && (env[i].sustain==1.0)
@@ -464,7 +471,20 @@ program_t parse(string fn)
 			sync_factor_const=true;
 		}
 		
-		//end optimizations
+		if ((sync_factor==0) && (sync_factor_const==true))
+			for (int i=0;i<n_osc;i++)
+			{
+				osc[i].sync=false;
+				osc[i].sync_const=true;
+			}
+		
+		
+		
+		for (int i=0;i<n_osc;i++)
+			if ( (osc[i].output_no_pfactor==false) && !((osc[i].output==0) && (osc[i].output_const=true)) )
+				osc[i].output_const=false;
+		
+		//end optimizations and checks
 		
 		result.n_osc=n_osc;
 		result.osc=osc;
diff --git a/note_compiler/programs.h b/note_compiler/programs.h
index d7acd61..9025ba1 100644
--- a/note_compiler/programs.h
+++ b/note_compiler/programs.h
@@ -47,6 +47,7 @@ struct oscillator_t
 	bool *fm_strength_const;
 	fixed_t output;      
 	bool output_const;      
+	bool output_no_pfactor;      
 	int waveform;
 	bool waveform_const;
 	fixed_t factor;
-- 
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