diracdec: add support for 12 bit videos

The DSP lacked a function needed to convert signed to unsigned. This was
ignored when originally adding support and templating for bit depths
greater than 8. The 10 bit function was used for 12 bit pictures and
resulted in an improper conversion.

Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c
index ee07ff8bb3..8ab4360288 100644
--- a/libavcodec/diracdec.c
+++ b/libavcodec/diracdec.c
@@ -1839,9 +1839,12 @@ static int dirac_decode_frame_internal(DiracContext *s)
 
         if (!s->num_refs) { /* intra */
             for (y = 0; y < p->height; y += 16) {
+                int idx = (s->bit_depth - 8) >> 1;
                 ff_spatial_idwt_slice2(&d, y+16); /* decode */
-                s->diracdsp.put_signed_rect_clamped[s->pshift](frame + y*p->stride, p->stride,
-                                                               p->idwt_buf + y*p->idwt_stride, p->idwt_stride, p->width, 16);
+                s->diracdsp.put_signed_rect_clamped[idx](frame + y*p->stride,
+                                                         p->stride,
+                                                         p->idwt_buf + y*p->idwt_stride,
+                                                         p->idwt_stride, p->width, 16);
             }
         } else { /* inter */
             int rowheight = p->ybsep*p->stride;