ac3: Check the array bound before dereferencing

CC: libav-stable@libav.org Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
9 years ago · 5264e7ba21
parent a86aa16088
commit 5264e7ba21
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/ac3enc_template.c
+++ b/libavcodec/ac3enc_template.c
@ -260,7 +260,7 @@ static void apply_channel_coupling(AC3EncodeContext *s)
                energy_cpl = energy[blk][CPL_CH][bnd];
                energy_ch = energy[blk][ch][bnd];
                blk1 = blk+1;
-                while (!s->blocks[blk1].new_cpl_coords[ch] && blk1 < s->num_blocks) {
+                while (blk1 < s->num_blocks && !s->blocks[blk1].new_cpl_coords[ch]) {
                    if (s->blocks[blk1].cpl_in_use) {
                        energy_cpl += energy[blk1][CPL_CH][bnd];
                        energy_ch += energy[blk1][ch][bnd];