[FFmpeg-cvslog] avcodec/mpeg4videodec: Don't initialize unused RL VLCs

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Tue Dec  8 23:32:35 2020 +0100| [3e0bd5064d4e2f87a69c6028eb739db5a45d3cb9] | committer: Andreas Rheinhardt

avcodec/mpeg4videodec: Don't initialize unused RL VLCs

The RLTables whose VLC tables are only used for intra blocks only use
the very first VLC table; yet all 32 have been initialized. This commit
stops this by switching to INIT_FIRST_VLC_RL. This saves 201624B from
the .bss segment; in case the decoder is actually used, this translates
into less memory used.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3e0bd5064d4e2f87a69c6028eb739db5a45d3cb9
---

 libavcodec/mpeg4videodec.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
index c88de63f36..3cb7267485 100644
--- a/libavcodec/mpeg4videodec.c
+++ b/libavcodec/mpeg4videodec.c
@@ -3389,9 +3389,9 @@ av_cold void ff_mpeg4videodec_static_init(void) {
         ff_rl_init(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
         ff_rl_init(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
         ff_rl_init(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
-        INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
+        INIT_FIRST_VLC_RL(ff_mpeg4_rl_intra, 554);
         INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
-        INIT_VLC_RL(ff_rvlc_rl_intra, 1072);
+        INIT_FIRST_VLC_RL(ff_rvlc_rl_intra, 1072);
         INIT_VLC_STATIC(&dc_lum, DC_VLC_BITS, 10 /* 13 */,
                         &ff_mpeg4_DCtab_lum[0][1], 2, 1,
                         &ff_mpeg4_DCtab_lum[0][0], 2, 1, 512);