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avcodec/mobiclip: Avoid unnecessary VLC structure 

Everything besides VLC.table is basically write-only
and only VLC.table needs to be retained.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-09-24 15:43:10 +02:00
parent 36e7f9b339
commit 827d0325a9
1 changed files with 18 additions and 23 deletions
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41
libavcodec/mobiclip.c
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@ -274,28 +274,26 @@ typedef struct MobiClipContext {
BswapDSPContext bdsp;
} MobiClipContext;
static VLC rl_vlc[2];
static VLC mv_vlc[2][16];
static const VLCElem *rl_vlc[2];
static const VLCElem *mv_vlc[2][16];
static av_cold void mobiclip_init_static(void)
{
VLC_INIT_STATIC_FROM_LENGTHS(&rl_vlc[0], MOBI_RL_VLC_BITS, 104,
bits0, sizeof(*bits0),
syms0, sizeof(*syms0), sizeof(*syms0),
0, 0, 1 << MOBI_RL_VLC_BITS);
VLC_INIT_STATIC_FROM_LENGTHS(&rl_vlc[1], MOBI_RL_VLC_BITS, 104,
bits0, sizeof(*bits0),
syms1, sizeof(*syms1), sizeof(*syms1),
0, 0, 1 << MOBI_RL_VLC_BITS);
static VLCElem vlc_buf[(2 << MOBI_RL_VLC_BITS) + (2 * 16 << MOBI_MV_VLC_BITS)];
VLCInitState state =VLC_INIT_STATE(vlc_buf);
for (int i = 0; i < 2; i++) {
static VLCElem vlc_buf[2 * 16 << MOBI_MV_VLC_BITS];
rl_vlc[i] =
ff_vlc_init_tables_from_lengths(&state, MOBI_RL_VLC_BITS, 104,
bits0, sizeof(*bits0),
i ? syms1 : syms0, sizeof(*syms0), sizeof(*syms0),
0, 0);
for (int j = 0; j < 16; j++) {
mv_vlc[i][j].table = &vlc_buf[(16 * i + j) << MOBI_MV_VLC_BITS];
mv_vlc[i][j].table_allocated = 1 << MOBI_MV_VLC_BITS;
ff_vlc_init_from_lengths(&mv_vlc[i][j], MOBI_MV_VLC_BITS, mv_len[j],
mv_bits[i][j], sizeof(*mv_bits[i][j]),
mv_syms[i][j], sizeof(*mv_syms[i][j]), sizeof(*mv_syms[i][j]),
0, VLC_INIT_USE_STATIC, NULL);
mv_vlc[i][j] =
ff_vlc_init_tables_from_lengths(&state, MOBI_MV_VLC_BITS, mv_len[j],
mv_bits[i][j], sizeof(*mv_bits[i][j]),
mv_syms[i][j], sizeof(*mv_syms[i][j]), sizeof(*mv_syms[i][j]),
0, 0);
}
}
}
@ -410,8 +408,7 @@ static void read_run_encoding(AVCodecContext *avctx,
{
MobiClipContext *s = avctx->priv_data;
GetBitContext *gb = &s->gb;
int n = get_vlc2(gb, rl_vlc[s->dct_tab_idx].table,
MOBI_RL_VLC_BITS, 1);
int n = get_vlc2(gb, rl_vlc[s->dct_tab_idx], MOBI_RL_VLC_BITS, 1);
*last = (n >> 11) == 1;
*run = (n >> 5) & 0x3F;
@ -1195,8 +1192,7 @@ static int predict_motion(AVCodecContext *avctx,
for (int i = 0; i < 2; i++) {
int ret, idx2;
idx2 = get_vlc2(gb, mv_vlc[s->moflex][tidx].table,
MOBI_MV_VLC_BITS, 1);
idx2 = get_vlc2(gb, mv_vlc[s->moflex][tidx], MOBI_MV_VLC_BITS, 1);
ret = predict_motion(avctx, width, height, idx2,
offsetm, offsetx + i * adjx, offsety + i * adjy);
@ -1272,8 +1268,7 @@ static int mobiclip_decode(AVCodecContext *avctx, AVFrame *rframe,
motion[x / 16 + 2].x = 0;
motion[x / 16 + 2].y = 0;
idx = get_vlc2(gb, mv_vlc[s->moflex][0].table,
MOBI_MV_VLC_BITS, 1);
idx = get_vlc2(gb, mv_vlc[s->moflex][0], MOBI_MV_VLC_BITS, 1);
if (idx == 6 || idx == 7) {
ret = decode_macroblock(avctx, frame, x, y, idx == 7);