avcodec/idctdsp: Move ScanTable to mpegvideo

Only used there.

Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index fbe9884b4c..4326f7f9a5 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -320,6 +320,27 @@ static av_cold int dct_init(MpegEncContext *s)
     return 0;
 }
 
+av_cold void ff_init_scantable(const uint8_t *permutation, ScanTable *st,
+                               const uint8_t *src_scantable)
+{
+    int end;
+
+    st->scantable = src_scantable;
+
+    for (int i = 0; i < 64; i++) {
+        int j = src_scantable[i];
+        st->permutated[i] = permutation[j];
+    }
+
+    end = -1;
+    for (int i = 0; i < 64; i++) {
+        int j = st->permutated[i];
+        if (j > end)
+            end = j;
+        st->raster_end[i] = end;
+    }
+}
+
 av_cold void ff_mpv_idct_init(MpegEncContext *s)
 {
     if (s->codec_id == AV_CODEC_ID_MPEG4)