[FFmpeg-cvslog] libavutil: add av_mod_uintp2
James Almer
git at videolan.org
Thu Oct 12 01:45:52 EEST 2017
ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Wed Feb 22 12:53:34 2017 -0500| [19d57ca62e7134cb3cd5e937443501c417ceb79a] | committer: Vittorio Giovara
libavutil: add av_mod_uintp2
Signed-off-by: James Almer <jamrial at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=19d57ca62e7134cb3cd5e937443501c417ceb79a
---
libavutil/common.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/libavutil/common.h b/libavutil/common.h
index d2ddcba9ed..3832f107ba 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -183,6 +183,17 @@ static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
}
/**
+ * Clear high bits from an unsigned integer starting with specific bit position
+ * @param a value to clip
+ * @param p bit position to clip at
+ * @return clipped value
+ */
+static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
+{
+ return a & ((1 << p) - 1);
+}
+
+/**
* Add two signed 32-bit values with saturation.
*
* @param a one value
@@ -410,6 +421,9 @@ static av_always_inline av_const int av_popcount64_c(uint64_t x)
#ifndef av_clip_uintp2
# define av_clip_uintp2 av_clip_uintp2_c
#endif
+#ifndef av_mod_uintp2
+# define av_mod_uintp2 av_mod_uintp2_c
+#endif
#ifndef av_sat_add32
# define av_sat_add32 av_sat_add32_c
#endif
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