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avcodec/vvcdec: misc, reindent inter.c

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Nuo Mi 2024-06-04 20:04:10 +08:00
parent a4013e748a
commit 685174069f
1 changed files with 139 additions and 139 deletions
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278
libavcodec/vvc/inter.c
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@ -127,14 +127,14 @@ static void emulated_edge(const VVCLocalContext *lc, uint8_t *dst,
static int derive_weight_uni(int *denom, int *wx, int *ox,
const VVCLocalContext *lc, const MvField *mvf, const int c_idx)
{
const VVCFrameContext *fc = lc->fc;
const VVCPPS *pps = fc->ps.pps;
const VVCSH *sh = &lc->sc->sh;
const int weight_flag = (IS_P(sh->r) && pps->r->pps_weighted_pred_flag) ||
const VVCFrameContext *fc = lc->fc;
const VVCPPS *pps = fc->ps.pps;
const VVCSH *sh = &lc->sc->sh;
const int weight_flag = (IS_P(sh->r) && pps->r->pps_weighted_pred_flag) ||
(IS_B(sh->r) && pps->r->pps_weighted_bipred_flag);
if (weight_flag) {
const int lx = mvf->pred_flag - PF_L0;
const PredWeightTable *w = pps->r->pps_wp_info_in_ph_flag ? &fc->ps.ph.pwt : &sh->pwt;
const int lx = mvf->pred_flag - PF_L0;
const PredWeightTable *w = pps->r->pps_wp_info_in_ph_flag ? &fc->ps.ph.pwt : &sh->pwt;
*denom = w->log2_denom[c_idx > 0];
*wx = w->weight[lx][c_idx][mvf->ref_idx[lx]];
@ -147,11 +147,11 @@ static int derive_weight_uni(int *denom, int *wx, int *ox,
static int derive_weight(int *denom, int *w0, int *w1, int *o0, int *o1,
const VVCLocalContext *lc, const MvField *mvf, const int c_idx, const int dmvr_flag)
{
const VVCFrameContext *fc = lc->fc;
const VVCPPS *pps = fc->ps.pps;
const VVCSH *sh = &lc->sc->sh;
const int bcw_idx = mvf->bcw_idx;
const int weight_flag = (IS_P(sh->r) && pps->r->pps_weighted_pred_flag) ||
const VVCFrameContext *fc = lc->fc;
const VVCPPS *pps = fc->ps.pps;
const VVCSH *sh = &lc->sc->sh;
const int bcw_idx = mvf->bcw_idx;
const int weight_flag = (IS_P(sh->r) && pps->r->pps_weighted_pred_flag) ||
(IS_B(sh->r) && pps->r->pps_weighted_bipred_flag && !dmvr_flag);
if ((!weight_flag && !bcw_idx) || (bcw_idx && lc->cu->ciip_flag))
return 0;
@ -162,7 +162,7 @@ static int derive_weight(int *denom, int *w0, int *w1, int *o0, int *o1,
*w0 = 8 - *w1;
*o0 = *o1 = 0;
} else {
const VVCPPS *pps = fc->ps.pps;
const VVCPPS *pps = fc->ps.pps;
const PredWeightTable *w = pps->r->pps_wp_info_in_ph_flag ? &fc->ps.ph.pwt : &sh->pwt;
*denom = w->log2_denom[c_idx > 0];
@ -179,20 +179,20 @@ static int derive_weight(int *denom, int *w0, int *w1, int *o0, int *o1,
static void mc(VVCLocalContext *lc, int16_t *dst, const VVCFrame *ref, const Mv *mv,
int x_off, int y_off, const int block_w, const int block_h, const int c_idx)
{
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const uint8_t *src = ref->frame->data[c_idx];
ptrdiff_t src_stride = ref->frame->linesize[c_idx];
const int is_chroma = !!c_idx;
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int idx = av_log2(block_w) - 1;
const intptr_t mx = av_mod_uintp2(mv->x, 4 + hs) << (is_chroma - hs);
const intptr_t my = av_mod_uintp2(mv->y, 4 + vs) << (is_chroma - vs);
const int hpel_if_idx = (is_chroma || pu->merge_gpm_flag) ? 0 : pu->mi.hpel_if_idx;
const int8_t *hf = INTER_FILTER(hpel_if_idx, mx);
const int8_t *vf = INTER_FILTER(hpel_if_idx, my);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const uint8_t *src = ref->frame->data[c_idx];
ptrdiff_t src_stride = ref->frame->linesize[c_idx];
const int is_chroma = !!c_idx;
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int idx = av_log2(block_w) - 1;
const intptr_t mx = av_mod_uintp2(mv->x, 4 + hs) << (is_chroma - hs);
const intptr_t my = av_mod_uintp2(mv->y, 4 + vs) << (is_chroma - vs);
const int hpel_if_idx = (is_chroma || pu->merge_gpm_flag) ? 0 : pu->mi.hpel_if_idx;
const int8_t *hf = INTER_FILTER(hpel_if_idx, mx);
const int8_t *vf = INTER_FILTER(hpel_if_idx, my);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
x_off += mv->x >> (4 + hs);
y_off += mv->y >> (4 + vs);
@ -205,22 +205,22 @@ static void mc_uni(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride
const VVCFrame *ref, const MvField *mvf, int x_off, int y_off, const int block_w, const int block_h,
const int c_idx)
{
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const uint8_t *src = ref->frame->data[c_idx];
ptrdiff_t src_stride = ref->frame->linesize[c_idx];
const int lx = mvf->pred_flag - PF_L0;
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int idx = av_log2(block_w) - 1;
const Mv *mv = &mvf->mv[lx];
const int is_chroma = !!c_idx;
const intptr_t mx = av_mod_uintp2(mv->x, 4 + hs) << (is_chroma - hs);
const intptr_t my = av_mod_uintp2(mv->y, 4 + vs) << (is_chroma - vs);
const int hpel_if_idx = is_chroma ? 0 : pu->mi.hpel_if_idx;
const int8_t *hf = INTER_FILTER(hpel_if_idx, mx);
const int8_t *vf = INTER_FILTER(hpel_if_idx, my);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const uint8_t *src = ref->frame->data[c_idx];
ptrdiff_t src_stride = ref->frame->linesize[c_idx];
const int lx = mvf->pred_flag - PF_L0;
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int idx = av_log2(block_w) - 1;
const Mv *mv = &mvf->mv[lx];
const int is_chroma = !!c_idx;
const intptr_t mx = av_mod_uintp2(mv->x, 4 + hs) << (is_chroma - hs);
const intptr_t my = av_mod_uintp2(mv->y, 4 + vs) << (is_chroma - vs);
const int hpel_if_idx = is_chroma ? 0 : pu->mi.hpel_if_idx;
const int8_t *hf = INTER_FILTER(hpel_if_idx, mx);
const int8_t *vf = INTER_FILTER(hpel_if_idx, my);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
int denom, wx, ox;
x_off += mv->x >> (4 + hs);
@ -241,30 +241,30 @@ static void mc_bi(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_stride,
const int x_off, const int y_off, const int block_w, const int block_h, const int c_idx,
const int sb_bdof_flag)
{
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int idx = av_log2(block_w) - 1;
const VVCFrame *refs[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp + sb_bdof_flag * PROF_TEMP_OFFSET, lc->tmp1 + sb_bdof_flag * PROF_TEMP_OFFSET };
const VVCFrameContext *fc = lc->fc;
const PredictionUnit *pu = &lc->cu->pu;
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int idx = av_log2(block_w) - 1;
const VVCFrame *refs[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp + sb_bdof_flag * PROF_TEMP_OFFSET, lc->tmp1 + sb_bdof_flag * PROF_TEMP_OFFSET };
int denom, w0, w1, o0, o1;
const int weight_flag = derive_weight(&denom, &w0, &w1, &o0, &o1, lc, mvf, c_idx, pu->dmvr_flag);
const int is_chroma = !!c_idx;
const int hpel_if_idx = is_chroma ? 0 : pu->mi.hpel_if_idx;
const int weight_flag = derive_weight(&denom, &w0, &w1, &o0, &o1, lc, mvf, c_idx, pu->dmvr_flag);
const int is_chroma = !!c_idx;
const int hpel_if_idx = is_chroma ? 0 : pu->mi.hpel_if_idx;
for (int i = L0; i <= L1; i++) {
const Mv *mv = mvf->mv + i;
const int mx = av_mod_uintp2(mv->x, 4 + hs) << (is_chroma - hs);
const int my = av_mod_uintp2(mv->y, 4 + vs) << (is_chroma - vs);
const int ox = x_off + (mv->x >> (4 + hs));
const int oy = y_off + (mv->y >> (4 + vs));
const VVCFrame *ref = refs[i];
ptrdiff_t src_stride = ref->frame->linesize[c_idx];
const uint8_t *src = ref->frame->data[c_idx];
const int8_t *hf = INTER_FILTER(hpel_if_idx, mx);
const int8_t *vf = INTER_FILTER(hpel_if_idx, my);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
const Mv *mv = mvf->mv + i;
const int mx = av_mod_uintp2(mv->x, 4 + hs) << (is_chroma - hs);
const int my = av_mod_uintp2(mv->y, 4 + vs) << (is_chroma - vs);
const int ox = x_off + (mv->x >> (4 + hs));
const int oy = y_off + (mv->y >> (4 + vs));
const VVCFrame *ref = refs[i];
ptrdiff_t src_stride = ref->frame->linesize[c_idx];
const uint8_t *src = ref->frame->data[c_idx];
const int8_t *hf = INTER_FILTER(hpel_if_idx, mx);
const int8_t *vf = INTER_FILTER(hpel_if_idx, my);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
if (pu->dmvr_flag) {
const int x_sb = x_off + (orig_mv->mv[i].x >> (4 + hs));
@ -332,15 +332,15 @@ static void scaled_ref_pos_and_step(const VVCLocalContext *lc, const VVCRefPic *
static void emulated_edge_scaled(VVCLocalContext *lc, const uint8_t **src, ptrdiff_t *src_stride, int *src_height,
const VVCFrame *ref, const int x, const int y, const int dx, const int dy, const int w, const int h, const int is_chroma)
{
const int x_off = SCALED_INT(x);
const int y_off = SCALED_INT(y);
const int x_end = SCALED_INT(x + w * dx);
const int y_end = SCALED_INT(y + h * dy);
const int x_last = SCALED_INT(x + (w - 1) * dx);
const int y_last = SCALED_INT(y + (h - 1) * dy);
const int block_w = x_end - x_off + (x_end == x_last);
const int block_h = *src_height = y_end - y_off + (y_end == y_last);
const int wrap_enabled = 0;
const int x_off = SCALED_INT(x);
const int y_off = SCALED_INT(y);
const int x_end = SCALED_INT(x + w * dx);
const int y_end = SCALED_INT(y + h * dy);
const int x_last = SCALED_INT(x + (w - 1) * dx);
const int y_last = SCALED_INT(y + (h - 1) * dy);
const int block_w = x_end - x_off + (x_end == x_last);
const int block_h = *src_height = y_end - y_off + (y_end == y_last);
const int wrap_enabled = 0;
MC_EMULATED_EDGE(lc->edge_emu_buffer, src, src_stride, x_off, y_off);
}
@ -421,21 +421,21 @@ static void luma_prof_uni(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst
const VVCFrame *ref, const MvField *mvf, int x_off, int y_off, const int block_w, const int block_h,
const int cb_prof_flag, const int16_t *diff_mv_x, const int16_t *diff_mv_y)
{
const VVCFrameContext *fc = lc->fc;
const uint8_t *src = ref->frame->data[LUMA];
ptrdiff_t src_stride = ref->frame->linesize[LUMA];
uint16_t *prof_tmp = lc->tmp + PROF_TEMP_OFFSET;
const int idx = av_log2(block_w) - 1;
const int lx = mvf->pred_flag - PF_L0;
const Mv *mv = mvf->mv + lx;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int8_t *hf = ff_vvc_inter_luma_filters[VVC_INTER_LUMA_FILTER_TYPE_AFFINE][mx];
const int8_t *vf = ff_vvc_inter_luma_filters[VVC_INTER_LUMA_FILTER_TYPE_AFFINE][my];
const VVCFrameContext *fc = lc->fc;
const uint8_t *src = ref->frame->data[LUMA];
ptrdiff_t src_stride = ref->frame->linesize[LUMA];
uint16_t *prof_tmp = lc->tmp + PROF_TEMP_OFFSET;
const int idx = av_log2(block_w) - 1;
const int lx = mvf->pred_flag - PF_L0;
const Mv *mv = mvf->mv + lx;
const int mx = mv->x & 0xf;
const int my = mv->y & 0xf;
const int8_t *hf = ff_vvc_inter_luma_filters[VVC_INTER_LUMA_FILTER_TYPE_AFFINE][mx];
const int8_t *vf = ff_vvc_inter_luma_filters[VVC_INTER_LUMA_FILTER_TYPE_AFFINE][my];
int denom, wx, ox;
const int weight_flag = derive_weight_uni(&denom, &wx, &ox, lc, mvf, LUMA);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
const int is_chroma = 0;
const int weight_flag = derive_weight_uni(&denom, &wx, &ox, lc, mvf, LUMA);
const int wrap_enabled = fc->ps.pps->r->pps_ref_wraparound_enabled_flag;
const int is_chroma = 0;
x_off += mv->x >> 4;
y_off += mv->y >> 4;
@ -488,11 +488,11 @@ static void luma_prof_bi(VVCLocalContext *lc, uint8_t *dst, const ptrdiff_t dst_
const VVCRefPic *ref0, const VVCRefPic *ref1, const MvField *mvf, const int x_off, const int y_off,
const int block_w, const int block_h)
{
const VVCFrameContext *fc = lc->fc;
const VVCRefPic *refps[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp, lc->tmp1 };
const VVCFrameContext *fc = lc->fc;
const VVCRefPic *refps[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp, lc->tmp1 };
int denom, w0, w1, o0, o1;
const int weight_flag = derive_weight(&denom, &w0, &w1, &o0, &o1, lc, mvf, LUMA, 0);
const int weight_flag = derive_weight(&denom, &w0, &w1, &o0, &o1, lc, mvf, LUMA, 0);
for (int i = L0; i <= L1; i++) {
const VVCRefPic *refp = refps[i];
@ -531,16 +531,16 @@ static int pred_get_refs(const VVCLocalContext *lc, VVCRefPic *refp[2], const Mv
static void pred_gpm_blk(VVCLocalContext *lc)
{
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
const uint8_t angle_idx = ff_vvc_gpm_angle_idx[pu->gpm_partition_idx];
const uint8_t weights_idx = ff_vvc_gpm_angle_to_weights_idx[angle_idx];
const int w = av_log2(cu->cb_width) - 3;
const int h = av_log2(cu->cb_height) - 3;
const uint8_t off_x = ff_vvc_gpm_weights_offset_x[pu->gpm_partition_idx][h][w];
const uint8_t off_y = ff_vvc_gpm_weights_offset_y[pu->gpm_partition_idx][h][w];
const int w = av_log2(cu->cb_width) - 3;
const int h = av_log2(cu->cb_height) - 3;
const uint8_t off_x = ff_vvc_gpm_weights_offset_x[pu->gpm_partition_idx][h][w];
const uint8_t off_y = ff_vvc_gpm_weights_offset_y[pu->gpm_partition_idx][h][w];
const uint8_t mirror_type = ff_vvc_gpm_angle_to_mirror[angle_idx];
const uint8_t *weights;
@ -549,13 +549,13 @@ static void pred_gpm_blk(VVCLocalContext *lc)
int16_t *tmp[2] = {lc->tmp, lc->tmp1};
for (int c_idx = 0; c_idx < c_end; c_idx++) {
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int x = lc->cu->x0 >> hs;
const int y = lc->cu->y0 >> vs;
const int width = cu->cb_width >> hs;
const int height = cu->cb_height >> vs;
uint8_t *dst = POS(c_idx, lc->cu->x0, lc->cu->y0);
const int hs = fc->ps.sps->hshift[c_idx];
const int vs = fc->ps.sps->vshift[c_idx];
const int x = lc->cu->x0 >> hs;
const int y = lc->cu->y0 >> vs;
const int width = cu->cb_width >> hs;
const int height = cu->cb_height >> vs;
uint8_t *dst = POS(c_idx, lc->cu->x0, lc->cu->y0);
ptrdiff_t dst_stride = fc->frame->linesize[c_idx];
int step_x = 1 << hs;
@ -572,8 +572,9 @@ static void pred_gpm_blk(VVCLocalContext *lc)
for (int i = 0; i < 2; i++) {
const MvField *mv = pu->gpm_mv + i;
const int lx = mv->pred_flag - PF_L0;
VVCRefPic *refp = lc->sc->rpl[lx].refs + mv->ref_idx[lx];
const int lx = mv->pred_flag - PF_L0;
VVCRefPic *refp = lc->sc->rpl[lx].refs + mv->ref_idx[lx];
if (!refp->ref)
return;
if (refp->is_scaled)
@ -589,15 +590,14 @@ static void pred_gpm_blk(VVCLocalContext *lc)
static int ciip_derive_intra_weight(const VVCLocalContext *lc, const int x0, const int y0,
const int width, const int height)
{
const VVCFrameContext *fc = lc->fc;
const VVCSPS *sps = fc->ps.sps;
const int x0b = av_mod_uintp2(x0, sps->ctb_log2_size_y);
const int y0b = av_mod_uintp2(y0, sps->ctb_log2_size_y);
const int available_l = lc->ctb_left_flag || x0b;
const int available_u = lc->ctb_up_flag || y0b;
const int min_pu_width = fc->ps.pps->min_pu_width;
int w = 1;
const VVCFrameContext *fc = lc->fc;
const VVCSPS *sps = fc->ps.sps;
const int x0b = av_mod_uintp2(x0, sps->ctb_log2_size_y);
const int y0b = av_mod_uintp2(y0, sps->ctb_log2_size_y);
const int available_l = lc->ctb_left_flag || x0b;
const int available_u = lc->ctb_up_flag || y0b;
const int min_pu_width = fc->ps.pps->min_pu_width;
int w = 1;
if (available_u &&fc->tab.mvf[((y0 - 1) >> MIN_PU_LOG2) * min_pu_width + ((x0 - 1 + width)>> MIN_PU_LOG2)].pred_flag == PF_INTRA)
w++;
@ -709,10 +709,10 @@ static int parametric_mv_refine(const int *sad, const int stride)
static void dmvr_mv_refine(VVCLocalContext *lc, MvField *mvf, MvField *orig_mv, int *sb_bdof_flag,
const VVCFrame *ref0, const VVCFrame *ref1, const int x_off, const int y_off, const int block_w, const int block_h)
{
const VVCFrameContext *fc = lc->fc;
const int sr_range = 2;
const VVCFrame *refs[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp, lc->tmp1 };
const VVCFrameContext *fc = lc->fc;
const int sr_range = 2;
const VVCFrame *refs[] = { ref0, ref1 };
int16_t *tmp[] = { lc->tmp, lc->tmp1 };
int sad[SAD_ARRAY_SIZE][SAD_ARRAY_SIZE];
int min_dx, min_dy, min_sad, dx, dy;
@ -808,9 +808,9 @@ static void derive_sb_mv(VVCLocalContext *lc, MvField *mv, MvField *orig_mv, int
static void pred_regular_blk(VVCLocalContext *lc, const int skip_ciip)
{
const CodingUnit *cu = lc->cu;
PredictionUnit *pu = &lc->cu->pu;
const MotionInfo *mi = &pu->mi;
const CodingUnit *cu = lc->cu;
PredictionUnit *pu = &lc->cu->pu;
const MotionInfo *mi = &pu->mi;
MvField mv, orig_mv;
int sbw, sbh, sb_bdof_flag = 0;
@ -854,17 +854,17 @@ static void derive_affine_mvc(MvField *mvc, const VVCFrameContext *fc, const MvF
static void pred_affine_blk(VVCLocalContext *lc)
{
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
const MotionInfo *mi = &pu->mi;
const int x0 = cu->x0;
const int y0 = cu->y0;
const int sbw = cu->cb_width / mi->num_sb_x;
const int sbh = cu->cb_height / mi->num_sb_y;
const int hs = fc->ps.sps->hshift[1];
const int vs = fc->ps.sps->vshift[1];
const int dst_stride = fc->frame->linesize[LUMA];
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
const MotionInfo *mi = &pu->mi;
const int x0 = cu->x0;
const int y0 = cu->y0;
const int sbw = cu->cb_width / mi->num_sb_x;
const int sbh = cu->cb_height / mi->num_sb_y;
const int hs = fc->ps.sps->hshift[1];
const int vs = fc->ps.sps->vshift[1];
const int dst_stride = fc->frame->linesize[LUMA];
for (int sby = 0; sby < mi->num_sb_y; sby++) {
for (int sbx = 0; sbx < mi->num_sb_x; sbx++) {
@ -905,9 +905,9 @@ static void pred_affine_blk(VVCLocalContext *lc)
static void predict_inter(VVCLocalContext *lc)
{
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
const VVCFrameContext *fc = lc->fc;
const CodingUnit *cu = lc->cu;
const PredictionUnit *pu = &cu->pu;
if (pu->merge_gpm_flag)
pred_gpm_blk(lc);
@ -929,9 +929,9 @@ static int has_inter_luma(const CodingUnit *cu)
int ff_vvc_predict_inter(VVCLocalContext *lc, const int rs)
{
const VVCFrameContext *fc = lc->fc;
const CTU *ctu = fc->tab.ctus + rs;
CodingUnit *cu = ctu->cus;
const VVCFrameContext *fc = lc->fc;
const CTU *ctu = fc->tab.ctus + rs;
CodingUnit *cu = ctu->cus;
while (cu) {
lc->cu = cu;