jpeg2000dec: Support non subsampled 9-16bit planar pixel formats

This applies changes similar to fc6de70c44
to the >8bit codepath

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/jpeg2000dec.c

@@ -1292,14 +1292,20 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
             uint16_t *linel;
             int cbps = s->cbps[compno];
             int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
+            int planar = !!picture->data[2];
+            int pixelsize = planar ? 1 : s->ncomponents;
+            int plane = 0;
+
+            if (planar)
+                plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1);
 
             y     = tile->comp[compno].coord[1][0] - s->image_offset_y;
-            linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 1);
+            linel = (uint16_t *)picture->data[plane] + y * (picture->linesize[plane] >> 1);
             for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
                 uint16_t *dst;
 
                 x   = tile->comp[compno].coord[0][0] - s->image_offset_x;
-                dst = linel + (x * s->ncomponents + compno);
+                dst = linel + (x * pixelsize + compno*!planar);
                 if (codsty->transform == FF_DWT97) {
                     for (; x < w; x += s-> cdx[compno]) {
                         int  val = lrintf(*datap) + (1 << (cbps - 1));
@@ -1308,7 +1314,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
                         /* align 12 bit values in little-endian mode */
                         *dst = val << (16 - cbps);
                         datap++;
-                        dst += s->ncomponents;
+                        dst += pixelsize;
                     }
                 } else {
                     for (; x < w; x += s-> cdx[compno]) {
@@ -1318,10 +1324,10 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
                         /* align 12 bit values in little-endian mode */
                         *dst = val << (16 - cbps);
                         i_datap++;
-                        dst += s->ncomponents;
+                        dst += pixelsize;
                     }
                 }
-                linel += picture->linesize[0] >> 1;
+                linel += picture->linesize[plane] >> 1;
             }
         }
     }