@@ -89,6 +89,12 @@ static int adx_decode_header(AVCodecContext *avctx, const uint8_t *buf,

     if (bufsize < offset || memcmp(buf + offset - 6, "(c)CRI", 6))

         return AVERROR_INVALIDDATA;

+    /* check for encoding=3 block_size=18, sample_size=4 */

+    if (buf[4] != 3 || buf[5] != 18 || buf[6] != 4) {

+        av_log_ask_for_sample(avctx, "unsupported ADX format\n");

+        return AVERROR_PATCHWELCOME;

+    }

+

     c->channels = avctx->channels = buf[7];

     if (avctx->channels > 2)

         return AVERROR_INVALIDDATA;