[FFmpeg-cvslog] error_concealment: Prevent FPEs in case of corrupted input.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Fri Mar 23 21:56:42 2012 +0100| [71c2a70cbfbb5fea6dffa5e462b0227565e29bcc] | committer: Michael Niedermayer

error_concealment: Prevent FPEs in case of corrupted input.

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=71c2a70cbfbb5fea6dffa5e462b0227565e29bcc
---

 libavcodec/error_resilience.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c
index cd6aa01..c93cea5 100644
--- 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;
             }