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avcodec/imm4: Avoid unnecessary VLC structure 

Everything besides VLC.table is basically write-only
and even VLC.table can be removed by accessing the
underlying table directly.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-24 15:52:52 +02:00
parent f6c5d04b6d
commit e3ad5b9784
1 changed files with 19 additions and 19 deletions
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38
libavcodec/imm4.c
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@ -108,16 +108,16 @@ static const uint8_t block_bits[] = {
6, 5, 5, 5, 4, 2, 3, 4, 4,
};
static VLC cbplo_tab;
static VLC cbphi_tab;
static VLC blktype_tab;
static VLC block_tab;
static VLCElem cbplo_tab[1 << CBPLO_VLC_BITS];
static VLCElem cbphi_tab[1 << CBPHI_VLC_BITS];
static VLCElem blktype_tab[1 << BLKTYPE_VLC_BITS];
static VLCElem block_tab[1 << BLOCK_VLC_BITS];
static int get_cbphi(GetBitContext *gb, int x)
{
int value;
value = get_vlc2(gb, cbphi_tab.table, CBPHI_VLC_BITS, 1);
value = get_vlc2(gb, cbphi_tab, CBPHI_VLC_BITS, 1);
if (value < 0)
return AVERROR_INVALIDDATA;
@ -134,7 +134,7 @@ static int decode_block(AVCodecContext *avctx, GetBitContext *gb,
for (i = !flag; i < 64; i++) {
int value;
value = get_vlc2(gb, block_tab.table, BLOCK_VLC_BITS, 1);
value = get_vlc2(gb, block_tab, BLOCK_VLC_BITS, 1);
if (value < 0)
return AVERROR_INVALIDDATA;
if (value == 0) {
@ -221,7 +221,7 @@ static int decode_intra(AVCodecContext *avctx, GetBitContext *gb, AVFrame *frame
for (x = 0; x < avctx->width; x += 16) {
unsigned flag, cbphi, cbplo;
cbplo = get_vlc2(gb, cbplo_tab.table, CBPLO_VLC_BITS, 1);
cbplo = get_vlc2(gb, cbplo_tab, CBPLO_VLC_BITS, 1);
flag = get_bits1(gb);
cbphi = get_cbphi(gb, 1);
@ -287,7 +287,7 @@ static int decode_inter(AVCodecContext *avctx, GetBitContext *gb,
continue;
}
value = get_vlc2(gb, blktype_tab.table, BLKTYPE_VLC_BITS, 1);
value = get_vlc2(gb, blktype_tab, BLKTYPE_VLC_BITS, 1);
if (value < 0)
return AVERROR_INVALIDDATA;
@ -473,20 +473,20 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
static av_cold void imm4_init_static_data(void)
{
VLC_INIT_STATIC_FROM_LENGTHS(&cbplo_tab, CBPLO_VLC_BITS, FF_ARRAY_ELEMS(cbplo),
&cbplo[0][1], 2, &cbplo[0][0], 2, 1,
0, 0, 1 << CBPLO_VLC_BITS);
VLC_INIT_STATIC_TABLE_FROM_LENGTHS(cbplo_tab, CBPLO_VLC_BITS, FF_ARRAY_ELEMS(cbplo),
&cbplo[0][1], 2, &cbplo[0][0], 2, 1,
0, 0);
VLC_INIT_SPARSE_STATIC(&cbphi_tab, CBPHI_VLC_BITS, FF_ARRAY_ELEMS(cbphi_bits),
cbphi_bits, 1, 1, cbphi_codes, 1, 1, NULL, 0, 0, 64);
VLC_INIT_STATIC_TABLE(cbphi_tab, CBPHI_VLC_BITS, FF_ARRAY_ELEMS(cbphi_bits),
cbphi_bits, 1, 1, cbphi_codes, 1, 1, 0);
VLC_INIT_STATIC_FROM_LENGTHS(&blktype_tab, BLKTYPE_VLC_BITS, FF_ARRAY_ELEMS(blktype),
&blktype[0][1], 2, &blktype[0][0], 2, 1,
0, 0, 1 << BLKTYPE_VLC_BITS);
VLC_INIT_STATIC_TABLE_FROM_LENGTHS(blktype_tab, BLKTYPE_VLC_BITS, FF_ARRAY_ELEMS(blktype),
&blktype[0][1], 2, &blktype[0][0], 2, 1,
0, 0);
VLC_INIT_STATIC_FROM_LENGTHS(&block_tab, BLOCK_VLC_BITS, FF_ARRAY_ELEMS(block_bits),
block_bits, 1, block_symbols, 2, 2,
0, 0, 1 << BLOCK_VLC_BITS);
VLC_INIT_STATIC_TABLE_FROM_LENGTHS(block_tab, BLOCK_VLC_BITS, FF_ARRAY_ELEMS(block_bits),
block_bits, 1, block_symbols, 2, 2,
0, 0);
}
static av_cold int decode_init(AVCodecContext *avctx)