[FFmpeg-cvslog] avcodec/ffv1dec: Support gray 10/12/16 explicitly avoid shifts

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Thu Nov 17 23:21:37 2016 +0100| [d7a3bb2088679623db70eaa432e7e3563cbd561d] | committer: Michael Niedermayer

avcodec/ffv1dec: Support gray 10/12/16 explicitly avoid shifts

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d7a3bb2088679623db70eaa432e7e3563cbd561d
---

 libavcodec/ffv1dec.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/libavcodec/ffv1dec.c b/libavcodec/ffv1dec.c
index 0719e28..b5fb825 100644
--- a/libavcodec/ffv1dec.c
+++ b/libavcodec/ffv1dec.c
@@ -575,8 +575,19 @@ static int read_header(FFV1Context *f)
         if (!f->transparency && !f->chroma_planes) {
             if (f->avctx->bits_per_raw_sample <= 8)
                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY8;
-            else
+            else if (f->avctx->bits_per_raw_sample == 10) {
+                f->packed_at_lsb = 1;
+                f->avctx->pix_fmt = AV_PIX_FMT_GRAY10;
+            } else if (f->avctx->bits_per_raw_sample == 12) {
+                f->packed_at_lsb = 1;
+                f->avctx->pix_fmt = AV_PIX_FMT_GRAY12;
+            } else if (f->avctx->bits_per_raw_sample == 16) {
+                f->packed_at_lsb = 1;
+                f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
+            } else if (f->avctx->bits_per_raw_sample < 16) {
                 f->avctx->pix_fmt = AV_PIX_FMT_GRAY16;
+            } else
+                return AVERROR(ENOSYS);
         } else if (f->transparency && !f->chroma_planes) {
             if (f->avctx->bits_per_raw_sample <= 8)
                 f->avctx->pix_fmt = AV_PIX_FMT_YA8;