avcodec/aacps: move checks for valid length outside the stereo_interpolate dsp function

Signed-off-by: James Almer <jamrial@gmail.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/libavcodec/aacps.c b/libavcodec/aacps.c
index 29de8a5ea7..473da7bd43 100644
--- a/libavcodec/aacps.c
+++ b/libavcodec/aacps.c
@@ -979,9 +979,10 @@ static void stereo_processing(PSContext *ps, INTFLOAT (*l)[32][2], INTFLOAT (*r)
                 h_step[1][2] = AAC_MSUB31_V3(H21[1][e+1][b], h[1][2], width);
                 h_step[1][3] = AAC_MSUB31_V3(H22[1][e+1][b], h[1][3], width);
             }
-            ps->dsp.stereo_interpolate[!PS_BASELINE && ps->enable_ipdopd](
-                l[k] + 1 + start, r[k] + 1 + start,
-                h, h_step, stop - start);
+            if (stop - start)
+                ps->dsp.stereo_interpolate[!PS_BASELINE && ps->enable_ipdopd](
+                    l[k] + 1 + start, r[k] + 1 + start,
+                    h, h_step, stop - start);
         }
     }
 }