error_concealment: Prevent FPEs in case of corrupted input.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · 71c2a70cbf
parent e2d110d8d2
commit 71c2a70cbf
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/error_resilience.c
+++ b/libavcodec/error_resilience.c
@ -248,7 +248,7 @@ static void guess_dc(MpegEncContext *s, int16_t *dc, int w,
            weight_sum = 0;
            guess      = 0;
            for (j = 0; j < 4; j++) {
-                int64_t weight  = 256 * 256 * 256 * 16 / dist[b_x + b_y*stride][j];
+                int64_t weight  = 256 * 256 * 256 * 16 / FFMAX(dist[b_x + b_y*stride][j], 1);
                guess          += weight*(int64_t)col[b_x + b_y*stride][j];
                weight_sum     += weight;
            }