avcodec/svq1enc: Check dimensions

Fixes assertion failure

Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit 88fe45e0fe379d7ea86c8ac1e1e8cf2c3f62389f)

Signed-off-by: Michael Niedermayer <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/libavcodec/svq1enc.c b/libavcodec/svq1enc.c
index 2a0d78043a..493027dfb5 100644
--- a/libavcodec/svq1enc.c
+++ b/libavcodec/svq1enc.c
@@ -514,6 +514,11 @@ static av_cold int svq1_encode_init(AVCodecContext *avctx)
     SVQ1EncContext *const s = avctx->priv_data;
     int ret;
 
+    if (avctx->width >= 4096 || avctx->height >= 4096) {
+        av_log(avctx, AV_LOG_ERROR, "Dimensions too large, maximum is 4095x4095\n");
+        return AVERROR(EINVAL);
+    }
+
     ff_hpeldsp_init(&s->hdsp, avctx->flags);
     ff_me_cmp_init(&s->mecc, avctx);
     ff_mpegvideoencdsp_init(&s->m.mpvencdsp, avctx);