* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- *
*/
/**
- * @file integer.c
- * arbitrary precision integers.
+ * @file libavutil/integer.c
+ * arbitrary precision integers
* @author Michael Niedermayer <michaelni@gmx.at>
*/
return a;
}
-/**
- * returns the rounded down value of the logarithm of base 2 of the given AVInteger.
- * this is simply the index of the most significant bit which is 1. Or 0 of all bits are 0
- */
int av_log2_i(AVInteger a){
int i;
int i;
for(i=0; i<AV_INTEGER_SIZE; i++){
- int index= i + (s>>4);
+ unsigned int index= i + (s>>4);
unsigned int v=0;
- if(index+1<AV_INTEGER_SIZE && index+1>=0) v = a.v[index+1]<<16;
- if(index <AV_INTEGER_SIZE && index >=0) v+= a.v[index ];
+ if(index+1<AV_INTEGER_SIZE) v = a.v[index+1]<<16;
+ if(index <AV_INTEGER_SIZE) v+= a.v[index ];
out.v[i]= v >> (s&15);
}
return out;
return out;
}
-/**
- * converts the given AVInteger to an int64_t.
- * if the AVInteger is too large to fit into an int64_t,
- * then only the least significant 64bit will be used
- */
int64_t av_i2int(AVInteger a){
int i;
int64_t out=(int8_t)a.v[AV_INTEGER_SIZE-1];
return out;
}
-#if 0
+#ifdef TEST
#undef NDEBUG
#include <assert.h>
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
};
-main(){
+int main(void){
int64_t a,b;
for(a=7; a<256*256*256; a+=13215){
assert(av_i2int(av_div_i(ai,bi)) == a/b);
}
}
+ return 0;
}
#endif