common: add a helper to round up to next power of 2

This is something relatively frequently needed, and there must be half a
dozen ad-hoc implementations in mpv. The next commit uses this, the
suspected duplicate implementations are hiding.

1 files changed, 1 insertions, 0 deletions

diff --git a/common/common.h b/common/common.h
index 5e6950c931..8dbb304625 100644
--- a/common/common.h
+++ b/common/common.h
@@ -89,6 +89,7 @@ bool mp_rect_contains(struct mp_rect *rc, int x, int y);
 bool mp_rect_equals(struct mp_rect *rc1, struct mp_rect *rc2);
 
 unsigned int mp_log2(uint32_t v);
+uint32_t mp_round_next_power_of_2(uint32_t v);
 
 int mp_snprintf_cat(char *str, size_t size, const char *format, ...)
     PRINTF_ATTRIBUTE(3, 4);