avcodec/jpeg2000dwt: add special cases for handling length 1 in 5/3 decode

Fixes Ticket4630 Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
10 years ago · 8294ec67b5
parent 20657e05bc
commit 8294ec67b5
1 changed files with 4 additions and 1 deletions
--- a/libavcodec/jpeg2000dwt.c
+++ b/libavcodec/jpeg2000dwt.c
@ -290,8 +290,11 @@ static void sr_1d53(int *p, int i0, int i1)
 {
    int i;

-    if (i1 == i0 + 1)
+    if (i1 <= i0 + 1) {
+        if (i0 == 1)
+            p[1] >>= 1;
        return;
+    }

    extend53(p, i0, i1);