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util: Add GST_ROUND_UP_N and GST_ROUND_DOWN_N

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These are generic rounding macro that works for any power of two.
This commit is contained in:
Nicolas Dufresne 2014-01-14 16:15:02 -05:00
parent 96f454d0ba
commit abddae152d
1 changed files with 19 additions and 0 deletions
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19
gst/gstutils.h
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@ -822,6 +822,15 @@ GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
* Since: 1.4 * Since: 1.4
*/ */
#define GST_ROUND_UP_128(num) (((num)+127)&~127) #define GST_ROUND_UP_128(num) (((num)+127)&~127)
/**
* GST_ROUND_UP_N:
* @num: integrer value to round up
* @align: a power of two to round up to
*
* Rounds an integer value up to the next multiple of @align. @align MUST be a
* power of two.
*/
#define GST_ROUND_UP_N(num,align) ((((num) + ((align) - 1)) & ~((align) - 1)))
/** /**
@ -874,6 +883,16 @@ GST_WRITE_DOUBLE_BE(guint8 *data, gdouble num)
* Since: 1.4 * Since: 1.4
*/ */
#define GST_ROUND_DOWN_128(num) ((num)&(~127)) #define GST_ROUND_DOWN_128(num) ((num)&(~127))
/**
* GST_ROUND_DOWN_N:
* @num: integrer value to round down
* @align: a power of two to round down to
*
* Rounds an integer value down to the next multiple of @align. @align MUST be a
* power of two.
*/
#define GST_ROUND_DOWN_N(num,align) (((num) & ~((align) - 1)))
void gst_object_default_error (GstObject * source, void gst_object_default_error (GstObject * source,
const GError * error, const GError * error,