indeo4: print an error message if ref_mb is needed but unavailable

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
12 years ago · febbddbdd5
parent 76d0a6656b
commit febbddbdd5
1 changed files with 3 additions and 1 deletions
--- a/libavcodec/indeo4.c
+++ b/libavcodec/indeo4.c
@ -528,8 +528,10 @@ static int decode_mb_info(IVI45DecContext *ctx, IVIBandDesc *band,
            } else {
                if (band->inherit_mv) {
                    /* copy mb_type from corresponding reference mb */
-                    if (!ref_mb)
+                    if (!ref_mb) {
+                        av_log(avctx, AV_LOG_ERROR, "ref_mb unavailable\n");
                        return AVERROR_INVALIDDATA;
+                    }
                    mb->type = ref_mb->type;
                } else if (ctx->frame_type == FRAMETYPE_INTRA ||
                           ctx->frame_type == FRAMETYPE_INTRA1) {