Lower CPU usage on graphic eq

Signed-off-by: Damien Zammit <damien@zamaudio.com>

2 files changed, 6 insertions, 2 deletions

diff --git a/plugins/ZamGEQ31/ZamGEQ31Plugin.cpp b/plugins/ZamGEQ31/ZamGEQ31Plugin.cpp
index 22bf77c..cac1584 100644
--- a/plugins/ZamGEQ31/ZamGEQ31Plugin.cpp
+++ b/plugins/ZamGEQ31/ZamGEQ31Plugin.cpp
@@ -662,6 +662,7 @@ void ZamGEQ31Plugin::loadProgram(uint32_t index)
     float srate = getSampleRate();
     for (i = 0; i < 29; ++i) {
         geq(i, srate, 0.);
+        gainold[i] = 0.;
     }
 
     /* reset filter values */
@@ -691,7 +692,10 @@ void ZamGEQ31Plugin::run(const float** inputs, float** outputs, uint32_t frames)
 	
 	uint32_t i, j;
 	for (i = 0; i < 29; i++) {
-		geq(i, srate, gain[i]);
+		if (gain[i] != gainold[i]) {
+			geq(i, srate, gain[i]);
+			gainold[i] = gain[i];
+		}
 	}
 
 	for (i = 0; i < frames; i++) {
diff --git a/plugins/ZamGEQ31/ZamGEQ31Plugin.hpp b/plugins/ZamGEQ31/ZamGEQ31Plugin.hpp
index 239873d..67bc4e2 100644
--- a/plugins/ZamGEQ31/ZamGEQ31Plugin.hpp
+++ b/plugins/ZamGEQ31/ZamGEQ31Plugin.hpp
@@ -144,7 +144,7 @@ protected:
     // -------------------------------------------------------------------
 
 private:
-    float gain[29], master; //parameters
+    float gain[29], gainold[29], master; //parameters
 };
 
 // -----------------------------------------------------------------------