avcodec/mpegvideo: fix edge emulation with uvlinesize below 25

Fixes fate-vsynth3-wmv2
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/mpegvideo.c

@@ -2497,19 +2497,20 @@ static av_always_inline void mpeg_motion_lowres(MpegEncContext *s,
                                 v_edge_pos);
         ptr_y = s->edge_emu_buffer;
         if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
-            uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize;
-            s->vdsp.emulated_edge_mc(uvbuf,  ptr_cb,
+            uint8_t *ubuf = s->edge_emu_buffer + 18 * s->linesize;
+            uint8_t *vbuf =ubuf + 9 * s->uvlinesize;
+            s->vdsp.emulated_edge_mc(ubuf,  ptr_cb,
                                      uvlinesize >> field_based, uvlinesize >> field_based,
                                      9, 9 + field_based,
                                     uvsrc_x, uvsrc_y << field_based,
                                     h_edge_pos >> 1, v_edge_pos >> 1);
-            s->vdsp.emulated_edge_mc(uvbuf + 16,  ptr_cr,
+            s->vdsp.emulated_edge_mc(vbuf,  ptr_cr,
                                      uvlinesize >> field_based,uvlinesize >> field_based,
                                      9, 9 + field_based,
                                     uvsrc_x, uvsrc_y << field_based,
                                     h_edge_pos >> 1, v_edge_pos >> 1);
-            ptr_cb = uvbuf;
-            ptr_cr = uvbuf + 16;
+            ptr_cb = ubuf;
+            ptr_cr = vbuf;
         }
     }
 

libavcodec/mpegvideo_motion.c

@@ -324,19 +324,20 @@ void mpeg_motion_internal(MpegEncContext *s,
                                  s->h_edge_pos, s->v_edge_pos);
         ptr_y = s->edge_emu_buffer;
         if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
-            uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize;
-            s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,
+            uint8_t *ubuf = s->edge_emu_buffer + 18 * s->linesize;
+            uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
+            s->vdsp.emulated_edge_mc(ubuf, ptr_cb,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
                                      uvsrc_x, uvsrc_y << field_based,
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
-            s->vdsp.emulated_edge_mc(uvbuf + 16, ptr_cr,
+            s->vdsp.emulated_edge_mc(vbuf, ptr_cr,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
                                      uvsrc_x, uvsrc_y << field_based,
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
-            ptr_cb = uvbuf;
-            ptr_cr = uvbuf + 16;
+            ptr_cb = ubuf;
+            ptr_cr = vbuf;
         }
     }
 
@@ -545,19 +546,20 @@ static inline void qpel_motion(MpegEncContext *s,
                                  s->h_edge_pos, s->v_edge_pos);
         ptr_y = s->edge_emu_buffer;
         if (!CONFIG_GRAY || !(s->flags & CODEC_FLAG_GRAY)) {
-            uint8_t *uvbuf = s->edge_emu_buffer + 18 * s->linesize;
-            s->vdsp.emulated_edge_mc(uvbuf, ptr_cb,
+            uint8_t *ubuf = s->edge_emu_buffer + 18 * s->linesize;
+            uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
+            s->vdsp.emulated_edge_mc(ubuf, ptr_cb,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
                                      uvsrc_x, uvsrc_y << field_based,
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
-            s->vdsp.emulated_edge_mc(uvbuf + 16, ptr_cr,
+            s->vdsp.emulated_edge_mc(vbuf, ptr_cr,
                                      s->uvlinesize, s->uvlinesize,
                                      9, 9 + field_based,
                                      uvsrc_x, uvsrc_y << field_based,
                                      s->h_edge_pos >> 1, s->v_edge_pos >> 1);
-            ptr_cb = uvbuf;
-            ptr_cr = uvbuf + 16;
+            ptr_cb = ubuf;
+            ptr_cr = vbuf;
         }
     }