avcodec/jpeg2000dec: Add YA16 support

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/jpeg2000dec.c

@@ -449,6 +449,10 @@ static int get_siz(Jpeg2000DecoderContext *s)
                    s->cdx[0] == s->cdx[1] && s->cdy[0] == s->cdy[1]) {
             s->avctx->pix_fmt = AV_PIX_FMT_YA8;
             i = 0;
+        } else if (ncomponents == 2 && s->precision == 16 &&
+                   s->cdx[0] == s->cdx[1] && s->cdy[0] == s->cdy[1]) {
+            s->avctx->pix_fmt = AV_PIX_FMT_YA16;
+            i = 0;
         } else if (ncomponents == 1 && s->precision == 8) {
             s->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
             i = 0;