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Code Issues Releases Activity

avcodec/mpeg12enc: Don't initialize ff_rl_mpeg2 unnecessarily

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ff_rl_mpeg1 and ff_rl_mpeg2 differ only in RLTable.table_vlc,
which ff_rl_init() does not use to initialize RLTable.max_level,
RLTable.max_run and RLTable.index_run. This implies
that these tables agree for ff_rl_mpeg1 and ff_rl_mpeg2;
hence one can just use one of them and avoid calling ff_rl_init()
ff_rl_mpeg2 alltogether.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-10-22 01:39:09 +02:00
parent 178dcbb96f
commit 06fafbe01e
1 changed files with 3 additions and 4 deletions
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7
libavcodec/mpeg12enc.c
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@ -1076,14 +1076,13 @@ void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64],
static av_cold void mpeg12_encode_init_static(void)
{
static uint8_t mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
static uint8_t mpeg12_static_rl_table_store[2][2*MAX_RUN + MAX_LEVEL + 3];
ff_rl_init(&ff_rl_mpeg1, mpeg12_static_rl_table_store[0]);
ff_rl_init(&ff_rl_mpeg2, mpeg12_static_rl_table_store[1]);
ff_rl_init(&ff_rl_mpeg1, mpeg12_static_rl_table_store);
ff_mpeg1_init_uni_ac_vlc(ff_rl_mpeg1.max_level[0], ff_rl_mpeg1.index_run[0],
ff_mpeg1_vlc_table, uni_mpeg1_ac_vlc_len);
ff_mpeg1_init_uni_ac_vlc(ff_rl_mpeg2.max_level[0], ff_rl_mpeg2.index_run[0],
ff_mpeg1_init_uni_ac_vlc(ff_rl_mpeg1.max_level[0], ff_rl_mpeg1.index_run[0],
ff_mpeg2_vlc_table, uni_mpeg2_ac_vlc_len);
/* build unified dc encoding tables */