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-rw-r--r--libavcodec/dvdec.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/dvdec.c b/libavcodec/dvdec.c
index 5cc205ce03..48cbbfc70e 100644
--- a/libavcodec/dvdec.c
+++ b/libavcodec/dvdec.c
@@ -287,9 +287,9 @@ static int dv_decode_video_segment(AVCodecContext *avctx, void *arg)
int x, y;
mb->idct_put(pixels, 8, block);
for (y = 0; y < (1 << log2_blocksize); y++, c_ptr += s->picture.linesize[j], pixels += 8) {
- ptr1 = pixels + (1 << (log2_blocksize - 1));
+ ptr1 = pixels + ((1 << (log2_blocksize))>>1);
c_ptr1 = c_ptr + (s->picture.linesize[j] << log2_blocksize);
- for (x = 0; x < (1 << (log2_blocksize - 1)); x++) {
+ for (x = 0; x < (1 << FFMAX(log2_blocksize - 1, 0)); x++) {
c_ptr[x] = pixels[x];
c_ptr1[x] = ptr1[x];
}