cosmetics: Use 'num' instead of 'nom' as abbreviation for numerator.

Originally committed as revision 16910 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavutil/rational.c

@@ -33,23 +33,23 @@
 #include "mathematics.h"
 #include "rational.h"
 
-int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max){
+int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max){
     AVRational a0={0,1}, a1={1,0};
-    int sign= (nom<0) ^ (den<0);
-    int64_t gcd= av_gcd(FFABS(nom), FFABS(den));
+    int sign= (num<0) ^ (den<0);
+    int64_t gcd= av_gcd(FFABS(num), FFABS(den));
 
     if(gcd){
-        nom = FFABS(nom)/gcd;
+        num = FFABS(num)/gcd;
         den = FFABS(den)/gcd;
     }
-    if(nom<=max && den<=max){
-        a1= (AVRational){nom, den};
+    if(num<=max && den<=max){
+        a1= (AVRational){num, den};
         den=0;
     }
 
     while(den){
-        uint64_t x      = nom / den;
-        int64_t next_den= nom - den*x;
+        uint64_t x      = num / den;
+        int64_t next_den= num - den*x;
         int64_t a2n= x*a1.num + a0.num;
         int64_t a2d= x*a1.den + a0.den;
 
@@ -57,19 +57,19 @@ int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max)
             if(a1.num) x= (max - a0.num) / a1.num;
             if(a1.den) x= FFMIN(x, (max - a0.den) / a1.den);
 
-            if (den*(2*x*a1.den + a0.den) > nom*a1.den)
+            if (den*(2*x*a1.den + a0.den) > num*a1.den)
                 a1 = (AVRational){x*a1.num + a0.num, x*a1.den + a0.den};
             break;
         }
 
         a0= a1;
         a1= (AVRational){a2n, a2d};
-        nom= den;
+        num= den;
         den= next_den;
     }
     assert(av_gcd(a1.num, a1.den) <= 1U);
 
-    *dst_nom = sign ? -a1.num : a1.num;
+    *dst_num = sign ? -a1.num : a1.num;
     *dst_den = a1.den;
 
     return den==0;

libavutil/rational.h

@@ -64,14 +64,14 @@ static inline double av_q2d(AVRational a){
 /**
  * Reduces a fraction.
  * This is useful for framerate calculations.
- * @param dst_nom destination numerator
+ * @param dst_num destination numerator
  * @param dst_den destination denominator
- * @param nom source numerator
+ * @param num source numerator
  * @param den source denominator
- * @param max the maximum allowed for dst_nom & dst_den
+ * @param max the maximum allowed for dst_num & dst_den
  * @return 1 if exact, 0 otherwise
  */
-int av_reduce(int *dst_nom, int *dst_den, int64_t nom, int64_t den, int64_t max);
+int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max);
 
 /**
  * Multiplies two rationals.