static void tokenize_b(int plane, int block, BLOCK_SIZE_TYPE plane_bsize,
TX_SIZE tx_size, void *arg) {
struct tokenize_b_args* const args = arg;
VP9_COMP *cpi = args->cpi;
MACROBLOCKD *xd = args->xd;
TOKENEXTRA **tp = args->tp;
struct macroblockd_plane *pd = &xd->plane[plane];
MB_MODE_INFO *mbmi = &xd->mode_info_context->mbmi;
int pt; /* near block/prev token context index */
int c = 0, rc = 0;
TOKENEXTRA *t = *tp; /* store tokens starting here */
const int eob = pd->eobs[block];
const PLANE_TYPE type = pd->plane_type;
const int16_t *qcoeff_ptr = BLOCK_OFFSET(pd->qcoeff, block);
int seg_eob;
const int segment_id = mbmi->segment_id;
const int16_t *scan, *nb;
vp9_coeff_count *const counts = cpi->coef_counts[tx_size];
vp9_coeff_probs_model *const coef_probs = cpi->common.fc.coef_probs[tx_size];
const int ref = is_inter_block(mbmi);
ENTROPY_CONTEXT above_ec, left_ec;
uint8_t token_cache[1024];
const uint8_t *band_translate;
ENTROPY_CONTEXT *A, *L;
int aoff, loff;
txfrm_block_to_raster_xy(plane_bsize, tx_size, block, &aoff, &loff);
A = pd->above_context + aoff;
L = pd->left_context + loff;
assert((!type && !plane) || (type && plane));
switch (tx_size) {
case TX_4X4:
above_ec = A[0] != 0;
left_ec = L[0] != 0;
seg_eob = 16;
scan = get_scan_4x4(get_tx_type_4x4(type, xd, block));
band_translate = vp9_coefband_trans_4x4;
break;
case TX_8X8:
above_ec = !!*(uint16_t *)A;
left_ec = !!*(uint16_t *)L;
seg_eob = 64;
scan = get_scan_8x8(get_tx_type_8x8(type, xd));
band_translate = vp9_coefband_trans_8x8plus;
break;
case TX_16X16:
above_ec = !!*(uint32_t *)A;
left_ec = !!*(uint32_t *)L;
seg_eob = 256;
scan = get_scan_16x16(get_tx_type_16x16(type, xd));
band_translate = vp9_coefband_trans_8x8plus;
break;
case TX_32X32:
above_ec = !!*(uint64_t *)A;
left_ec = !!*(uint64_t *)L;
seg_eob = 1024;
scan = vp9_default_scan_32x32;
band_translate = vp9_coefband_trans_8x8plus;
break;
default:
assert(!"Invalid transform size");
}
pt = combine_entropy_contexts(above_ec, left_ec);
nb = vp9_get_coef_neighbors_handle(scan);
if (vp9_segfeature_active(&cpi->common.seg, segment_id, SEG_LVL_SKIP))
seg_eob = 0;
c = 0;
do {
const int band = get_coef_band(band_translate, c);
int token;
int v = 0;
rc = scan[c];
if (c)
pt = get_coef_context(nb, token_cache, c);
if (c < eob) {
v = qcoeff_ptr[rc];
assert(-DCT_MAX_VALUE <= v && v < DCT_MAX_VALUE);
t->extra = vp9_dct_value_tokens_ptr[v].extra;
token = vp9_dct_value_tokens_ptr[v].token;
} else {
token = DCT_EOB_TOKEN;
}
t->token = token;
t->context_tree = coef_probs[type][ref][band][pt];
t->skip_eob_node = (c > 0) && (token_cache[scan[c - 1]] == 0);
assert(vp9_coef_encodings[t->token].len - t->skip_eob_node > 0);
++counts[type][ref][band][pt][token];
if (!t->skip_eob_node)
++cpi->common.counts.eob_branch[tx_size][type][ref][band][pt];
token_cache[rc] = vp9_pt_energy_class[token];
++t;
} while (c < eob && ++c < seg_eob);
*tp = t;
set_contexts(xd, pd, plane_bsize, tx_size, c > 0, aoff, loff);
}
static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
vp9_reader *r, int block_idx,
PLANE_TYPE type, int seg_eob, int16_t *qcoeff_ptr,
TX_SIZE tx_size, const int16_t *dq, int pt) {
const FRAME_CONTEXT *const fc = &cm->fc;
FRAME_COUNTS *const counts = &cm->counts;
const int ref = is_inter_block(&xd->mi_8x8[0]->mbmi);
int band, c = 0;
const vp9_prob (*coef_probs)[PREV_COEF_CONTEXTS][UNCONSTRAINED_NODES] =
fc->coef_probs[tx_size][type][ref];
vp9_prob coef_probs_full[COEF_BANDS][PREV_COEF_CONTEXTS][ENTROPY_NODES];
uint8_t load_map[COEF_BANDS][PREV_COEF_CONTEXTS] = { { 0 } };
const vp9_prob *prob;
vp9_coeff_count_model *coef_counts = counts->coef[tx_size];
const int16_t *scan, *nb;
const uint8_t *const band_translate = get_band_translate(tx_size);
uint8_t token_cache[1024];
get_scan(xd, tx_size, type, block_idx, &scan, &nb);
while (1) {
int val;
const uint8_t *cat6 = cat6_prob;
if (c >= seg_eob)
break;
if (c)
pt = get_coef_context(nb, token_cache, c);
band = get_coef_band(band_translate, c);
prob = coef_probs[band][pt];
if (!cm->frame_parallel_decoding_mode)
++counts->eob_branch[tx_size][type][ref][band][pt];
if (!vp9_read(r, prob[EOB_CONTEXT_NODE]))
break;
SKIP_START:
if (c >= seg_eob)
break;
if (c)
pt = get_coef_context(nb, token_cache, c);
band = get_coef_band(band_translate, c);
prob = coef_probs[band][pt];
if (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) {
INCREMENT_COUNT(ZERO_TOKEN);
++c;
goto SKIP_START;
}
// ONE_CONTEXT_NODE_0_
if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(1, ONE_TOKEN);
}
// Load full probabilities if not already loaded
if (!load_map[band][pt]) {
vp9_model_to_full_probs(coef_probs[band][pt],
coef_probs_full[band][pt]);
load_map[band][pt] = 1;
}
prob = coef_probs_full[band][pt];
// LOW_VAL_CONTEXT_NODE_0_
if (!vp9_read(r, prob[LOW_VAL_CONTEXT_NODE])) {
if (!vp9_read(r, prob[TWO_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(2, TWO_TOKEN);
}
if (!vp9_read(r, prob[THREE_CONTEXT_NODE])) {
WRITE_COEF_CONTINUE(3, THREE_TOKEN);
}
WRITE_COEF_CONTINUE(4, FOUR_TOKEN);
}
// HIGH_LOW_CONTEXT_NODE_0_
if (!vp9_read(r, prob[HIGH_LOW_CONTEXT_NODE])) {
if (!vp9_read(r, prob[CAT_ONE_CONTEXT_NODE])) {
val = CAT1_MIN_VAL;
ADJUST_COEF(CAT1_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY1);
}
val = CAT2_MIN_VAL;
ADJUST_COEF(CAT2_PROB1, 1);
ADJUST_COEF(CAT2_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY2);
}
// CAT_THREEFOUR_CONTEXT_NODE_0_
if (!vp9_read(r, prob[CAT_THREEFOUR_CONTEXT_NODE])) {
if (!vp9_read(r, prob[CAT_THREE_CONTEXT_NODE])) {
val = CAT3_MIN_VAL;
ADJUST_COEF(CAT3_PROB2, 2);
ADJUST_COEF(CAT3_PROB1, 1);
ADJUST_COEF(CAT3_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY3);
}
val = CAT4_MIN_VAL;
ADJUST_COEF(CAT4_PROB3, 3);
ADJUST_COEF(CAT4_PROB2, 2);
ADJUST_COEF(CAT4_PROB1, 1);
ADJUST_COEF(CAT4_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY4);
}
// CAT_FIVE_CONTEXT_NODE_0_:
if (!vp9_read(r, prob[CAT_FIVE_CONTEXT_NODE])) {
val = CAT5_MIN_VAL;
ADJUST_COEF(CAT5_PROB4, 4);
ADJUST_COEF(CAT5_PROB3, 3);
ADJUST_COEF(CAT5_PROB2, 2);
ADJUST_COEF(CAT5_PROB1, 1);
ADJUST_COEF(CAT5_PROB0, 0);
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY5);
}
val = 0;
while (*cat6) {
val = (val << 1) | vp9_read(r, *cat6++);
}
val += CAT6_MIN_VAL;
WRITE_COEF_CONTINUE(val, DCT_VAL_CATEGORY6);
}
if (c < seg_eob) {
if (!cm->frame_parallel_decoding_mode)
++coef_counts[type][ref][band][pt][DCT_EOB_MODEL_TOKEN];
}
return c;
}
