Diff: interleave.h

Revision:

0:984643af7d81

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/interleave.h	Fri Jul 31 12:30:28 2015 +0000
@@ -0,0 +1,77 @@
+    void interleave( unsigned char *input, unsigned char *output ){
+    
+    unsigned int outState = 0;
+    unsigned int outByte = 0;
+    
+    for( unsigned int i = 0 ; i < 36 ; ++i ){
+        for(unsigned int j = 0 ; j < 30 ; ++j){
+            unsigned int x = j*36+i;
+            unsigned char tempBit = ((input[x >> 3]) >> (7-(x % 8))) & 1;
+            switch(outState){
+                case 0:
+                    outState = 1;
+                    output[outByte] = tempBit << 7;
+                    break;
+                case 1:
+                    outState = 2;
+                    output[outByte] += tempBit << 6;
+                    break;
+                case 2:
+                    outState = 3;
+                    output[outByte] += tempBit << 5;
+                    break;
+                case 3:
+                    outState = 4;
+                    output[outByte] += tempBit << 4;
+                    break;
+                case 4:
+                    outState = 5;
+                    output[outByte] += tempBit << 3;
+                    break;
+                case 5:
+                    outState = 6;
+                    output[outByte] += tempBit << 2;
+                    break;
+                case 6:
+                    outState = 7;
+                    output[outByte] += tempBit << 1;
+                    break;
+                case 7:
+                    outState = 0;
+                    output[outByte] += tempBit;
+                    ++outByte;
+                    break;
+            }
+        }
+        for(unsigned int j = 0 ; j < 2 ; ++j){
+            switch(outState){
+                case 0:
+                    output[outByte] = 0;
+                    outState = 1;
+                    break;
+                case 1:
+                    outState = 2;
+                    break;
+                case 2:
+                    outState = 3;
+                    break;
+                case 3:
+                    outState = 4;
+                    break;
+                case 4:
+                    outState = 5;
+                    break;
+                case 5:
+                    outState = 6;
+                    break;
+                case 6:
+                    outState = 7;
+                    break;
+                case 7:
+                    outState = 0;
+                    ++outByte;
+                    break;
+            }
+        }
+    }
+}
\ No newline at end of file