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mpeg4videodec: split initializing static tables into a separate function

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Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Anton Khirnov
2013-11-15 22:13:45 +01:00
parent a3f8c6a427
commit 56eded8bc7
1 changed files with 29 additions and 24 deletions
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53
libavcodec/mpeg4videodec.c
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@@ -45,6 +45,33 @@ static const int mb_type_b_map[4]= {
MB_TYPE_L0 | MB_TYPE_16x16,
};
static void init_tables(void)
{
static int done = 0;
if (!done) {
done = 1;
ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
INIT_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);
INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
&ff_mpeg4_DCtab_chrom[0][1], 2, 1,
&ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
&ff_sprite_trajectory_tab[0][1], 4, 2,
&ff_sprite_trajectory_tab[0][0], 4, 2, 128);
INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
&ff_mb_type_b_tab[0][1], 2, 1,
&ff_mb_type_b_tab[0][0], 2, 1, 16);
}
}
/**
* Predict the ac.
* @param n block index (0-3 are luma, 4-5 are chroma)
@@ -2202,7 +2229,8 @@ static av_cold int decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
int ret;
static int done = 0;
init_tables();
s->divx_version=
s->divx_build=
@@ -2212,29 +2240,6 @@ static av_cold int decode_init(AVCodecContext *avctx)
if((ret=ff_h263_decode_init(avctx)) < 0)
return ret;
if (!done) {
done = 1;
ff_init_rl(&ff_mpeg4_rl_intra, ff_mpeg4_static_rl_table_store[0]);
ff_init_rl(&ff_rvlc_rl_inter, ff_mpeg4_static_rl_table_store[1]);
ff_init_rl(&ff_rvlc_rl_intra, ff_mpeg4_static_rl_table_store[2]);
INIT_VLC_RL(ff_mpeg4_rl_intra, 554);
INIT_VLC_RL(ff_rvlc_rl_inter, 1072);
INIT_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);
INIT_VLC_STATIC(&dc_chrom, DC_VLC_BITS, 10 /* 13 */,
&ff_mpeg4_DCtab_chrom[0][1], 2, 1,
&ff_mpeg4_DCtab_chrom[0][0], 2, 1, 512);
INIT_VLC_STATIC(&sprite_trajectory, SPRITE_TRAJ_VLC_BITS, 15,
&ff_sprite_trajectory_tab[0][1], 4, 2,
&ff_sprite_trajectory_tab[0][0], 4, 2, 128);
INIT_VLC_STATIC(&mb_type_b_vlc, MB_TYPE_B_VLC_BITS, 4,
&ff_mb_type_b_tab[0][1], 2, 1,
&ff_mb_type_b_tab[0][0], 2, 1, 16);
}
s->h263_pred = 1;
s->low_delay = 0; //default, might be overriden in the vol header during header parsing
s->decode_mb= mpeg4_decode_mb;