initial checkin

2025-12-16 18:14:25 +00:00 · 2008-10-13 19:25:11 +00:00
parent 2e379c72e2
commit 36757fca7a
937 changed files with 184964 additions and 0 deletions
--- a/MAC_SDK/Source/MACLib/Old/AntiPredictorFast.cpp
+++ b/MAC_SDK/Source/MACLib/Old/AntiPredictorFast.cpp
@@ -0,0 +1,88 @@
+#include "All.h"
+#ifdef BACKWARDS_COMPATIBILITY
+
+#include "Anti-Predictor.h"
+
+#ifdef ENABLE_COMPRESSION_MODE_FAST
+
+void CAntiPredictorFast0000To3320::AntiPredict(int *pInputArray, int *pOutputArray, int NumberOfElements) {
+
+    //short frame handling
+    if (NumberOfElements < 32) {
+        memcpy(pOutputArray, pInputArray, NumberOfElements * 4);
+        return;
+    }
+
+    //the initial
+    pOutputArray[0] = pInputArray[0];
+    pOutputArray[1] = pInputArray[1] + pOutputArray[0];
+    pOutputArray[2] = pInputArray[2] + pOutputArray[1];
+    pOutputArray[3] = pInputArray[3] + pOutputArray[2];
+    pOutputArray[4] = pInputArray[4] + pOutputArray[3];
+    pOutputArray[5] = pInputArray[5] + pOutputArray[4];
+    pOutputArray[6] = pInputArray[6] + pOutputArray[5];
+    pOutputArray[7] = pInputArray[7] + pOutputArray[6];
+
+    //the rest
+    int p, pw;
+    int m = 4000;
+    int *ip, *op, *op1;
+
+    op1 = &pOutputArray[7];
+    p = (*op1 * 2) - pOutputArray[6];
+    pw = (p * m) >> 12;
+        
+    for (op = &pOutputArray[8], ip = &pInputArray[8]; ip < &pInputArray[NumberOfElements]; ip++, op++, op1++) {
+        *op = *ip + pw;
+                
+
+        //adjust m
+        if (*ip > 0)
+            m += (p > 0) ? 4 : -4;
+        else if (*ip < 0)
+            m += (p > 0) ? -4 : 4;
+
+        p = (*op * 2) - *op1;
+        pw = (p * m) >> 12;
+        
+    }
+}
+
+///////note: no output - overwrites input/////////////////
+void CAntiPredictorFast3320ToCurrent::AntiPredict(int *pInputArray, int *pOutputArray, int NumberOfElements) {
+
+    //short frame handling
+    if (NumberOfElements < 3) {
+        return;
+    }
+
+    //variable declares
+    int p;
+    int m = 375;
+    int *ip;
+    int IP2 = pInputArray[1];
+    int IP3 = pInputArray[0];
+    int OP1 = pInputArray[1];
+
+    //the decompression loop (order 2 followed by order 1)
+    for (ip = &pInputArray[2]; ip < &pInputArray[NumberOfElements]; ip++) {
+        
+        //make a prediction for order 2
+        p = IP2 + IP2 - IP3;
+        
+        //rollback the values
+        IP3 = IP2;
+        IP2 = *ip + ((p * m) >> 9);
+        
+        //adjust m for the order 2
+        (*ip ^ p) > 0 ? m++ : m--;
+
+        //set the output value
+        *ip = IP2 + OP1;
+        OP1 = *ip;
+    }
+}
+
+#endif // #ifdef ENABLE_COMPRESSION_MODE_FAST
+
+#endif // #ifdef BACKWARDS_COMPATIBILITY