Changeset 3094

Timestamp:

03/12/07 15:16:57 (6 years ago)

Author:

jgaeddert

Message:

fixing PPFB math

Location:

SigProc/trunk/SigProc

Files:

• SigProc.h (modified) (1 diff)
• filters.cpp (modified) (4 diffs)

SigProc/trunk/SigProc/SigProc.h

@@ -310 +310 @@
     unsigned int h_len;
 
-    /// circular input buffer (header ptr)
+    /// circular input buffer
     short *v;
 

SigProc/trunk/SigProc/filters.cpp

@@ -197 +197 @@
     // the correct length of each filter in the bank.
     v = new short[h_len];
+
+    // memset input buffer to zeros
+    ResetBuffer();
     
 }
@@ -218 +221 @@
 
     v = new short[h_len];
+
+    // memset input buffer to zeros
+    ResetBuffer();
 }
 
@@ -274 +280 @@
     for (unsigned int i=0; i<h_len; i++)
     {
-        // Decrement read index
-        i_read = (--i_read) % h_len;
-
         // Accumulate (apply filter)
         yf += float( v[i_read] ) * H[B+i];
 
+        // Increment read index
+        i_read++;
+        i_read = i_read % h_len;
     }
 
@@ -295 +301 @@
 void SigProc::FIRPolyphaseFilterBank::ResetBuffer()
 {
-    memset(v, 0, h_len);
+    // overwrite input buffer with zeros
+    memset(v, 0, sizeof(short) * h_len);
 }