From 13adaa31a9afb419f3d13cbf83beec5832212001 Mon Sep 17 00:00:00 2001 From: Vitaly Buka Date: Tue, 21 Apr 2020 21:34:19 -0700 Subject: [PATCH] mpeg4videoenc: Don't crash with -fsanitize=bounds Also the patch makes this code consistent with mpeg4videodec.c Signed-off-by: Michael Niedermayer (cherry picked from commit f163d30de2090a7275f1fb8ad69258576f12c1a2) Signed-off-by: Michael Niedermayer --- libavcodec/mpeg4videoenc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/mpeg4videoenc.c b/libavcodec/mpeg4videoenc.c index f6a5992df7..2cd5a8c015 100644 --- a/libavcodec/mpeg4videoenc.c +++ b/libavcodec/mpeg4videoenc.c @@ -104,7 +104,7 @@ static inline void restore_ac_coeffs(MpegEncContext *s, int16_t block[6][64], memcpy(s->block_last_index, zigzag_last_index, sizeof(int) * 6); for (n = 0; n < 6; n++) { - int16_t *ac_val = s->ac_val[0][0] + s->block_index[n] * 16; + int16_t *ac_val = &s->ac_val[0][0][0] + s->block_index[n] * 16; st[n] = s->intra_scantable.permutated; if (dir[n]) { @@ -143,7 +143,7 @@ static inline int decide_ac_pred(MpegEncContext *s, int16_t block[6][64], score -= get_block_rate(s, block[n], s->block_last_index[n], s->intra_scantable.permutated); - ac_val = s->ac_val[0][0] + s->block_index[n] * 16; + ac_val = &s->ac_val[0][0][0] + s->block_index[n] * 16; ac_val1 = ac_val; if (dir[n]) { const int xy = s->mb_x + s->mb_y * s->mb_stride - s->mb_stride;