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avoptions: Check the return value from av_get_number

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This avoids doing a division by zero if the option wasn't found,
or wasn't an option of an appropriate type.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2011-05-22 21:34:49 +03:00
parent 422b2362fc
commit 8089b7fa8c
1 changed files with 6 additions and 3 deletions
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9
libavutil/opt.c
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@ -290,7 +290,8 @@ double av_get_double(void *obj, const char *name, const AVOption **o_out)
double num=1;
int den=1;
av_get_number(obj, name, o_out, &num, &den, &intnum);
if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
return -1;
return num*intnum/den;
}
@ -300,7 +301,8 @@ AVRational av_get_q(void *obj, const char *name, const AVOption **o_out)
double num=1;
int den=1;
av_get_number(obj, name, o_out, &num, &den, &intnum);
if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
return (AVRational){-1, 0};
if (num == 1.0 && (int)intnum == intnum)
return (AVRational){intnum, den};
else
@ -313,7 +315,8 @@ int64_t av_get_int(void *obj, const char *name, const AVOption **o_out)
double num=1;
int den=1;
av_get_number(obj, name, o_out, &num, &den, &intnum);
if (av_get_number(obj, name, o_out, &num, &den, &intnum) < 0)
return -1;
return num*intnum/den;
}