avcodec/vlc: Merge VLCElem and RL_VLC_ELEM

It will simplify creating RL-VLCs (which until now used
a stack-based VLC as temporary buffer).

Notice that there would be another option to merge them, namely:
struct VLCElem {
    union {
        VLCBaseType sym;
        int16_t level;
    };
    int8_t len;
    uint8_t run;
};

The main difference to the current patch is that this would change
the type of the length field of VLCElem to int8_t from int16_t.
It turns out that that this would entail additional sign extensions
on ppc, see https://godbolt.org/z/behWYEYE7. I have therefore refrained
from doing so, although it would make the patch simpler.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index 444ea83f3c..0d4a36be04 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -119,7 +119,7 @@ av_cold void ff_init_2d_vlc_rl(const uint16_t table_vlc[][2], RL_VLC_ELEM rl_vlc
                 level = table_level[code];
             }
         }
-        rl_vlc[i].len   = len;
+        rl_vlc[i].len8  = len;
         rl_vlc[i].level = level;
         rl_vlc[i].run   = run;
     }