[FFmpeg-devel] [PATCH 3/4] avcodec/ivi: Only clip samples when needed in ivi_output_plane()
Michael Niedermayer
michael at niedermayer.cc
Sat Aug 4 03:58:32 EEST 2018
435740 -> 396078 dezicycles
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
---
libavcodec/ivi.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/libavcodec/ivi.c b/libavcodec/ivi.c
index cea40d82ca..ebb7f03007 100644
--- a/libavcodec/ivi.c
+++ b/libavcodec/ivi.c
@@ -913,8 +913,15 @@ static void ivi_output_plane(IVIPlaneDesc *plane, uint8_t *dst, ptrdiff_t dst_pi
return;
for (y = 0; y < plane->height; y++) {
- for (x = 0; x < plane->width; x++)
- dst[x] = av_clip_uint8(src[x] + 128);
+ int m = 0;
+ for (x = 0; x < plane->width; x++) {
+ int t = src[x] + 128;
+ dst[x] = t;
+ m |= t;
+ }
+ if (m & ~255)
+ for (x = 0; x < plane->width; x++)
+ dst[x] = av_clip_uint8(src[x] + 128);
src += pitch;
dst += dst_pitch;
}
--
2.18.0
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