[FFmpeg-cvslog] mpegvideo: Fix undefined negative shifts in mpeg_motion_internal

[Luca Barbato]

ffmpeg | branch: master | Luca Barbato <lu_zero at gentoo.org> | Fri Mar  4 16:57:29 2016 +0100| [0242351390643d176b10600c2eb854414f9559e6] | committer: Vittorio Giovara

mpegvideo: Fix undefined negative shifts in mpeg_motion_internal

Signed-off-by: Vittorio Giovara <vittorio.giovara at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=0242351390643d176b10600c2eb854414f9559e6
---

 libavcodec/mpegvideo_motion.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/libavcodec/mpegvideo_motion.c b/libavcodec/mpegvideo_motion.c
index 05375a1..aaa6e61 100644
--- a/libavcodec/mpegvideo_motion.c
+++ b/libavcodec/mpegvideo_motion.c
@@ -321,7 +321,7 @@ void mpeg_motion_internal(MpegEncContext *s,
         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
                                  s->linesize, s->linesize,
                                  17, 17 + field_based,
-                                 src_x, src_y << field_based,
+                                 src_x, src_y * (1 << field_based),
                                  s->h_edge_pos, s->v_edge_pos);
         ptr_y = s->sc.edge_emu_buffer;
         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
@@ -329,12 +329,12 @@ void mpeg_motion_internal(MpegEncContext *s,
             s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
-                                     uvsrc_x, uvsrc_y << field_based,
+                                     uvsrc_x, uvsrc_y * (1 << field_based),
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
             s->vdsp.emulated_edge_mc(uvbuf + 16, ptr_cr,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
-                                     uvsrc_x, uvsrc_y << field_based,
+                                     uvsrc_x, uvsrc_y * (1 << field_based),
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
             ptr_cb = uvbuf;
             ptr_cr = uvbuf + 16;
@@ -542,7 +542,7 @@ static inline void qpel_motion(MpegEncContext *s,
         s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr_y,
                                  s->linesize, s->linesize,
                                  17, 17 + field_based,
-                                 src_x, src_y << field_based,
+                                 src_x, src_y * (1 << field_based),
                                  s->h_edge_pos, s->v_edge_pos);
         ptr_y = s->sc.edge_emu_buffer;
         if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
@@ -550,12 +550,12 @@ static inline void qpel_motion(MpegEncContext *s,
             s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
-                                     uvsrc_x, uvsrc_y << field_based,
+                                     uvsrc_x, uvsrc_y * (1 << field_based),
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
             s->vdsp.emulated_edge_mc(uvbuf + 16, ptr_cr,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
-                                     uvsrc_x, uvsrc_y << field_based,
+                                     uvsrc_x, uvsrc_y * (1 << field_based),
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
             ptr_cb = uvbuf;
             ptr_cr = uvbuf + 16;