[SCM] calf/master: + Filter: better tolerance for race condition between parameter setting and graph drawing

[js at users.alioth.debian.org]

The following commit has been merged in the master branch:
commit fba13511829822b6243a871f46689cfa18299a54
Author: Krzysztof Foltman <wdev at foltman.com>
Date:   Tue Jan 27 21:20:02 2009 +0000

    + Filter: better tolerance for race condition between parameter setting and graph drawing

diff --git a/src/calf/modules.h b/src/calf/modules.h
index 2f63bdf..3366196 100644
--- a/src/calf/modules.h
+++ b/src/calf/modules.h
@@ -595,6 +595,7 @@ public:
     inertia<exponential_ramp> inertia_cutoff, inertia_resonance, inertia_gain;
     once_per_n timer;
     bool is_active;    
+    volatile int last_generation, last_calculated_generation;
     
     filter_module_with_inertia()
     : inertia_cutoff(exponential_ramp(128), 20)
@@ -631,10 +632,12 @@ public:
     
     void on_timer()
     {
+        int gen = last_generation;
         inertia_cutoff.step();
         inertia_resonance.step();
         inertia_gain.step();
         calculate_filter();
+        last_calculated_generation = gen;
     }
     
     void activate()
@@ -689,7 +692,6 @@ class filter_audio_module:
     public filter_module_with_inertia<biquad_filter_module, filter_metadata>, 
     public frequency_response_line_graph
 {
-    int last_generation;
     float old_cutoff, old_resonance, old_mode;
 public:    
     filter_audio_module()
diff --git a/src/modules_dsp.cpp b/src/modules_dsp.cpp
index c005918..5ee5bfa 100644
--- a/src/modules_dsp.cpp
+++ b/src/modules_dsp.cpp
@@ -259,7 +259,7 @@ int filter_audio_module::get_changed_offsets(int generation, int &subindex_graph
         subindex_graph = 0;
         subindex_dot = subindex_gridline = generation ? INT_MAX : 0;
     }
-    if (generation == last_generation)
+    if (generation == last_calculated_generation)
         subindex_graph = INT_MAX;
     return last_generation;
 }

-- 
calf audio plugins packaging