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| author | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2020-12-09 02:47:48 +0100 |
|---|---|---|
| committer | Andreas Rheinhardt <andreas.rheinhardt@gmail.com> | 2021-01-25 14:51:53 +0100 |
| commit | 27eea249cc99a53754ea61ccf29bdff9ae13f55e (patch) | |
| tree | 11c04f4cf9848b203971d50d1ec4416e44c2512e /libavcodec/ituh263dec.c | |
| parent | d90d0a715f08384bf44b004da60c6d1760a30beb (diff) | |
avcodec/msmpeg4dec: Reuse identical MV VLC
msmpeg4dec and ituh263dec both create VLCs with identical parameters out
of ff_mvtab. Given that ff_msmpeg4_decode_init() always (indirectly) calls
ff_h263_decode_init_vlc(), the VLC initialized by the latter can be
directly used by msmpeg4dec. Doing so saves a bit more than 2KB from the
.bss segment as well as the code to initialize a VLC.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Diffstat (limited to 'libavcodec/ituh263dec.c')
| -rw-r--r-- | libavcodec/ituh263dec.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c index 3847745098..1f5a49d86a 100644 --- a/libavcodec/ituh263dec.c +++ b/libavcodec/ituh263dec.c @@ -52,7 +52,6 @@ // reading vlc values. Changing these may improve speed and data cache needs // be aware though that decreasing them may need the number of stages that is // passed to get_vlc* to be increased. -#define MV_VLC_BITS 9 #define H263_MBTYPE_B_VLC_BITS 6 #define CBPC_B_VLC_BITS 3 @@ -99,7 +98,7 @@ void ff_h263_show_pict_info(MpegEncContext *s){ VLC ff_h263_intra_MCBPC_vlc; VLC ff_h263_inter_MCBPC_vlc; VLC ff_h263_cbpy_vlc; -static VLC mv_vlc; +VLC ff_h263_mv_vlc; static VLC h263_mbtype_b_vlc; static VLC cbpc_b_vlc; @@ -120,7 +119,7 @@ av_cold void ff_h263_decode_init_vlc(void) INIT_VLC_STATIC(&ff_h263_cbpy_vlc, CBPY_VLC_BITS, 16, &ff_h263_cbpy_tab[0][1], 2, 1, &ff_h263_cbpy_tab[0][0], 2, 1, 64); - INIT_VLC_STATIC(&mv_vlc, MV_VLC_BITS, 33, + INIT_VLC_STATIC(&ff_h263_mv_vlc, H263_MV_VLC_BITS, 33, &ff_mvtab[0][1], 2, 1, &ff_mvtab[0][0], 2, 1, 538); ff_rl_init(&ff_h263_rl_inter, ff_h263_static_rl_table_store[0]); @@ -271,7 +270,7 @@ int ff_h263_resync(MpegEncContext *s){ int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code) { int code, val, sign, shift; - code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2); + code = get_vlc2(&s->gb, ff_h263_mv_vlc.table, H263_MV_VLC_BITS, 2); if (code == 0) return pred; |