@@ -277,6 +277,11 @@ static av_cold int decode_init(AVCodecContext *avctx)

     int log2_max_num_subframes;

     int num_possible_block_sizes;

+    if (!avctx->block_align) {

+        av_log(avctx, AV_LOG_ERROR, "block_align is not set\n");

+        return AVERROR(EINVAL);

+    }

+

     s->avctx = avctx;

     avpriv_float_dsp_init(&s->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);