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+ adding endianness conversion macros for floats
Original commit message from CVS: + adding endianness conversion macros for floats
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commit
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1 changed files with 55 additions and 1 deletions
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@ -21,6 +21,15 @@
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#ifndef __FLOATCAST_H__
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#ifndef __FLOATCAST_H__
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#define __FLOATCAST_H__
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#define __FLOATCAST_H__
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <glib/gtypes.h>
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G_BEGIN_DECLS
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#if (HAVE_LRINT && HAVE_LRINTF)
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#if (HAVE_LRINT && HAVE_LRINTF)
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/* These defines enable functionality introduced with the 1999 ISO C
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/* These defines enable functionality introduced with the 1999 ISO C
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@ -40,7 +49,7 @@
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#define gst_cast_float(x) ((gint)lrintf(x))
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#define gst_cast_float(x) ((gint)lrintf(x))
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#define gst_cast_double(x) ((gint)lrint(x))
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#define gst_cast_double(x) ((gint)lrint(x))
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#else
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#else
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/* use a standard c cast, but do rounding correctly */
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/* use a standard c cast, but do rounding correctly */
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#define gst_cast_float(x) ((x)>=0?(gint)((x)+0.5):(gint)((x)-0.5))
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#define gst_cast_float(x) ((x)>=0?(gint)((x)+0.5):(gint)((x)-0.5))
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@ -48,5 +57,50 @@
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#endif
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#endif
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inline static gfloat
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GFLOAT_SWAP_LE_BE(gfloat in)
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{
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gint32 swap;
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gfloat out;
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memcpy(&swap, &in, 4);
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swap = GUINT32_SWAP_LE_BE_CONSTANT (swap);
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memcpy(&out, &swap, 4);
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return out;
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}
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inline static gdouble
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GDOUBLE_SWAP_LE_BE(gdouble in)
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{
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gint64 swap;
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gdouble out;
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memcpy(&swap, &in, 8);
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swap = GUINT64_SWAP_LE_BE_CONSTANT (swap);
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memcpy(&out, &swap, 8);
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return out;
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}
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#if G_BYTE_ORDER == G_LITTLE_ENDIAN
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#define GFLOAT_TO_LE(val) ((gfloat) (val))
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#define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val))
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#define GDOUBLE_TO_LE(val) ((gdouble) (val))
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#define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val))
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#elif G_BYTE_ORDER == G_BIG_ENDIAN
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#define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val))
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#define GFLOAT_TO_BE(val) ((gfloat) (val))
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#define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val))
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#define GDOUBLE_TO_BE(val) ((gdouble) (val))
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#else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
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#error unknown ENDIAN type
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#endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */
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#define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val))
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#define GFLOAT_FROM_BE(val) (GDOUBLE_TO_BE (val))
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#define GDOUBLE_FROM_LE(val) (GFLOAT_TO_LE (val))
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#define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val))
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G_END_DECLS
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#endif /* __FLOATCAST_H__ */
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#endif /* __FLOATCAST_H__ */
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