[FFmpeg-cvslog] swscale/output: Fix several invalid shifts in yuv2rgb_full_1_c_template()

[Michael Niedermayer]

ffmpeg | branch: release/2.8 | Michael Niedermayer <michael at niedermayer.cc> | Tue Jan 21 22:52:19 2020 +0100| [b1e6aaa735141bab7d62af95741c2f5a26476215] | committer: Michael Niedermayer

swscale/output: Fix several invalid shifts in yuv2rgb_full_1_c_template()

Fixes: Invalid shifts
Fixes: #8320

Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 7b7f97532b2ac8836d8d8e3c71dd026e35ae1ca7)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b1e6aaa735141bab7d62af95741c2f5a26476215
---

 libswscale/output.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/libswscale/output.c b/libswscale/output.c
index 31e10237d8..581758b667 100644
--- a/libswscale/output.c
+++ b/libswscale/output.c
@@ -1771,7 +1771,7 @@ yuv2rgb_full_1_c_template(SwsContext *c, const int16_t *buf0,
     if (uvalpha < 2048) {
         int A = 0; //init to silence warning
         for (i = 0; i < dstW; i++) {
-            int Y = buf0[i] << 2;
+            int Y = buf0[i] * 4;
             int U = (ubuf0[i] - (128<<7)) * 4;
             int V = (vbuf0[i] - (128<<7)) * 4;
 
@@ -1788,9 +1788,9 @@ yuv2rgb_full_1_c_template(SwsContext *c, const int16_t *buf0,
         const int16_t *ubuf1 = ubuf[1], *vbuf1 = vbuf[1];
         int A = 0; //init to silence warning
         for (i = 0; i < dstW; i++) {
-            int Y = buf0[i] << 2;
-            int U = (ubuf0[i] + ubuf1[i] - (128<<8)) << 1;
-            int V = (vbuf0[i] + vbuf1[i] - (128<<8)) << 1;
+            int Y = buf0[i] * 4;
+            int U = (ubuf0[i] + ubuf1[i] - (128<<8)) * 2;
+            int V = (vbuf0[i] + vbuf1[i] - (128<<8)) * 2;
 
             if (hasAlpha) {
                 A = (abuf0[i] + 64) >> 7;