mlpdec: do not try to allocate a zero-sized output buffer.

CC:libav-stable@libav.org

diff --git a/libavcodec/mlpdec.c b/libavcodec/mlpdec.c
index cf01b6e23c70d5ce4f17c584657d439eac695ff1..130ce26d6c4cf928896e9cfb60e729e43628e999 100644 (file)
--- a/libavcodec/mlpdec.c
+++ b/libavcodec/mlpdec.c
@@ -984,6 +984,11 @@ static int output_data(MLPDecodeContext *m, unsigned int substr,
         return AVERROR_INVALIDDATA;
     }
 
+    if (!s->blockpos) {
+        av_log(avctx, AV_LOG_ERROR, "No samples to output.\n");
+        return AVERROR_INVALIDDATA;
+    }
+
     /* get output buffer */
     frame->nb_samples = s->blockpos;
     if ((ret = ff_get_buffer(avctx, frame)) < 0) {