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Code Issues Releases Activity

avutil/rational: Test av_rescale_rnd() with combinations of "special" values

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-12-01 13:34:19 +01:00
parent f03c2ceec1
commit 97b8db334a
2 changed files with 45 additions and 0 deletions
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1
libavutil/Makefile
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@ -106,6 +106,7 @@ OBJS = adler32.o \
hash.o \
hmac.o \
imgutils.o \
integer.o \
intmath.o \
lfg.o \
lls.o \

44
libavutil/rational.c
View File

@ -183,9 +183,18 @@ uint32_t av_q2intfloat(AVRational q) {
}
#ifdef TEST
#include "integer.h"
int main(void)
{
AVRational a,b,r;
int i,j,k;
static const int64_t numlist[] = {
INT64_MIN, INT64_MIN+1, INT64_MAX, INT32_MIN, INT32_MAX, 1,0,-1,
123456789, INT32_MAX-1, INT32_MAX+1LL, UINT32_MAX-1, UINT32_MAX, UINT32_MAX+1LL
};
for (a.num = -2; a.num <= 2; a.num++) {
for (a.den = -2; a.den <= 2; a.den++) {
for (b.num = -2; b.num <= 2; b.num++) {
@ -207,6 +216,41 @@ int main(void)
}
}
for (i = 0; i < FF_ARRAY_ELEMS(numlist); i++) {
int64_t a = numlist[i];
for (j = 0; j < FF_ARRAY_ELEMS(numlist); j++) {
int64_t b = numlist[j];
if (b<=0)
continue;
for (k = 0; k < FF_ARRAY_ELEMS(numlist); k++) {
int64_t c = numlist[k];
int64_t res;
AVInteger ai;
if (c<=0)
continue;
res = av_rescale_rnd(a,b,c, AV_ROUND_ZERO);
ai = av_mul_i(av_int2i(a), av_int2i(b));
ai = av_div_i(ai, av_int2i(c));
if (av_cmp_i(ai, av_int2i(INT64_MAX)) > 0 && res == INT64_MIN)
continue;
if (av_cmp_i(ai, av_int2i(INT64_MIN)) < 0 && res == INT64_MIN)
continue;
if (av_cmp_i(ai, av_int2i(res)) == 0)
continue;
// Special exception for INT64_MIN, remove this in case INT64_MIN is handled without off by 1 error
if (av_cmp_i(ai, av_int2i(res-1)) == 0 && a == INT64_MIN)
continue;
av_log(NULL, AV_LOG_ERROR, "%"PRId64" * %"PRId64" / %"PRId64" = %"PRId64" or %"PRId64"\n", a,b,c, res, av_i2int(ai));
}
}
}
for (a.num = 1; a.num <= 10; a.num++) {
for (a.den = 1; a.den <= 10; a.den++) {
if (av_gcd(a.num, a.den) > 1)