Revert "avcodec/vlc: Add macro for ff_init_vlc_sparse()"

This reverts commit 61669b7c40.

This commit broke building with MSVC due to its spec-incompliant handling
of ',' in __VA_ARGS__: These are not treated as argument separators for
further macros, so that in our case the init_vlc2() macro is treated as
having only one argument whenever the init_vlc() macro is used. See [1]
for further details.

[1]: https://reviews.llvm.org/D69626

Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavcodec/smacker.c

@@ -222,9 +222,9 @@ static int smacker_decode_header_tree(SmackVContext *smk, GetBitContext *gb, int
         skip_bits1(gb);
         if (h.current > 1) {
             err = ff_init_vlc_sparse(&vlc[i], SMKTREE_BITS, h.current,
-                                     INIT_VLC_DEFAULT_SIZES(h.lengths),
-                                     INIT_VLC_DEFAULT_SIZES(h.bits),
-                                     INIT_VLC_DEFAULT_SIZES(h.values),
+                                     h.lengths, sizeof(*h.lengths), sizeof(*h.lengths),
+                                     h.bits,    sizeof(*h.bits),    sizeof(*h.bits),
+                                     h.values,  sizeof(*h.values),  sizeof(*h.values),
                                      INIT_VLC_LE);
             if (err < 0) {
                 av_log(smk->avctx, AV_LOG_ERROR, "Cannot build VLC table\n");
@@ -653,9 +653,9 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data,
         skip_bits1(&gb);
         if (h.current > 1) {
             ret = ff_init_vlc_sparse(&vlc[i], SMKTREE_BITS, h.current,
-                                     INIT_VLC_DEFAULT_SIZES(h.lengths),
-                                     INIT_VLC_DEFAULT_SIZES(h.bits),
-                                     INIT_VLC_DEFAULT_SIZES(h.values),
+                                     h.lengths, sizeof(*h.lengths), sizeof(*h.lengths),
+                                     h.bits,    sizeof(*h.bits),    sizeof(*h.bits),
+                                     h.values,  sizeof(*h.values),  sizeof(*h.values),
                                      INIT_VLC_LE);
             if (ret < 0) {
                 av_log(avctx, AV_LOG_ERROR, "Cannot build VLC table\n");

libavcodec/vlc.h

@@ -35,12 +35,7 @@ typedef struct RL_VLC_ELEM {
     uint8_t run;
 } RL_VLC_ELEM;
 
-#define INIT_VLC_DEFAULT_SIZES(ptr) \
-    (ptr), sizeof((ptr)[0]), sizeof((ptr)[0])
-
-#define init_vlc(...) init_vlc2(__VA_ARGS__)
-
-#define init_vlc2(vlc, nb_bits, nb_codes,               \
+#define init_vlc(vlc, nb_bits, nb_codes,                \
                  bits, bits_wrap, bits_size,            \
                  codes, codes_wrap, codes_size,         \
                  flags)                                 \