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/rl.c b/libavcodec/rl.c
index a78242d488..b45cf117c1 100644
--- a/libavcodec/rl.c
+++ b/libavcodec/rl.c
@@ -118,7 +118,7 @@ av_cold void ff_rl_init_vlc(RLTable *rl, unsigned static_size)
                     if (code >= rl->last) run += 192;
                 }
             }
-            rl->rl_vlc[q][i].len   = len;
+            rl->rl_vlc[q][i].len8  = len;
             rl->rl_vlc[q][i].level = level;
             rl->rl_vlc[q][i].run   = run;
         }