diff options
| -rw-r--r-- | gst-libs/gst/floatcast/floatcast.h | 56 |
1 files changed, 55 insertions, 1 deletions
diff --git a/gst-libs/gst/floatcast/floatcast.h b/gst-libs/gst/floatcast/floatcast.h index 0d5809f1..99577d91 100644 --- a/gst-libs/gst/floatcast/floatcast.h +++ b/gst-libs/gst/floatcast/floatcast.h @@ -21,6 +21,15 @@ #ifndef __FLOATCAST_H__ #define __FLOATCAST_H__ +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <string.h> +#include <glib/gtypes.h> + +G_BEGIN_DECLS + #if (HAVE_LRINT && HAVE_LRINTF) /* These defines enable functionality introduced with the 1999 ISO C @@ -40,7 +49,7 @@ #define gst_cast_float(x) ((gint)lrintf(x)) #define gst_cast_double(x) ((gint)lrint(x)) - + #else /* use a standard c cast, but do rounding correctly */ #define gst_cast_float(x) ((x)>=0?(gint)((x)+0.5):(gint)((x)-0.5)) @@ -48,5 +57,50 @@ #endif +inline static gfloat +GFLOAT_SWAP_LE_BE(gfloat in) +{ + gint32 swap; + gfloat out; + memcpy(&swap, &in, 4); + swap = GUINT32_SWAP_LE_BE_CONSTANT (swap); + memcpy(&out, &swap, 4); + return out; +} + +inline static gdouble +GDOUBLE_SWAP_LE_BE(gdouble in) +{ + gint64 swap; + gdouble out; + memcpy(&swap, &in, 8); + swap = GUINT64_SWAP_LE_BE_CONSTANT (swap); + memcpy(&out, &swap, 8); + return out; +} + +#if G_BYTE_ORDER == G_LITTLE_ENDIAN +#define GFLOAT_TO_LE(val) ((gfloat) (val)) +#define GFLOAT_TO_BE(val) (GFLOAT_SWAP_LE_BE (val)) +#define GDOUBLE_TO_LE(val) ((gdouble) (val)) +#define GDOUBLE_TO_BE(val) (GDOUBLE_SWAP_LE_BE (val)) + +#elif G_BYTE_ORDER == G_BIG_ENDIAN +#define GFLOAT_TO_LE(val) (GFLOAT_SWAP_LE_BE (val)) +#define GFLOAT_TO_BE(val) ((gfloat) (val)) +#define GDOUBLE_TO_LE(val) (GDOUBLE_SWAP_LE_BE (val)) +#define GDOUBLE_TO_BE(val) ((gdouble) (val)) + +#else /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ +#error unknown ENDIAN type +#endif /* !G_LITTLE_ENDIAN && !G_BIG_ENDIAN */ + +#define GFLOAT_FROM_LE(val) (GFLOAT_TO_LE (val)) +#define GFLOAT_FROM_BE(val) (GDOUBLE_TO_BE (val)) +#define GDOUBLE_FROM_LE(val) (GFLOAT_TO_LE (val)) +#define GDOUBLE_FROM_BE(val) (GDOUBLE_TO_BE (val)) + +G_END_DECLS + #endif /* __FLOATCAST_H__ */ |