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avfilter/f_metadata: avoid float rounding problems 

Signed-off-by: Tobias Rapp <t.rapp@noa-archive.com>
This commit is contained in:
Tobias Rapp 2016-02-11 13:35:19 +01:00 committed by Paul B Mahol
parent ac3a275d1e
commit 8b99c5e8da
1 changed files with 5 additions and 3 deletions
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8
libavfilter/f_metadata.c
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@ -23,6 +23,8 @@
* filter for manipulating frame metadata
*/
#include <float.h>
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/eval.h"
@ -117,7 +119,7 @@ static int equal(MetadataContext *s, const char *value1, const char *value2, siz
if (sscanf(value1, "%f", &f1) + sscanf(value2, "%f", &f2) != 2)
return 0;
return f1 == f2;
return fabsf(f1 - f2) < FLT_EPSILON;
}
static int less(MetadataContext *s, const char *value1, const char *value2, size_t length)
@ -127,7 +129,7 @@ static int less(MetadataContext *s, const char *value1, const char *value2, size
if (sscanf(value1, "%f", &f1) + sscanf(value2, "%f", &f2) != 2)
return 0;
return f1 < f2;
return (f1 - f2) < FLT_EPSILON;
}
static int greater(MetadataContext *s, const char *value1, const char *value2, size_t length)
@ -137,7 +139,7 @@ static int greater(MetadataContext *s, const char *value1, const char *value2, s
if (sscanf(value1, "%f", &f1) + sscanf(value2, "%f", &f2) != 2)
return 0;
return f1 > f2;
return (f2 - f1) < FLT_EPSILON;
}
static int parse_expr(MetadataContext *s, const char *value1, const char *value2, size_t length)