static int decode_term_subexp(vp9_reader *r) {
if (!vp9_read_bit(r))
return vp9_read_literal(r, 4);
if (!vp9_read_bit(r))
return vp9_read_literal(r, 4) + 16;
if (!vp9_read_bit(r))
return vp9_read_literal(r, 5) + 32;
return decode_uniform(r) + 64;
}
static void setup_txfm_mode(VP9_COMMON *pc, int lossless, vp9_reader *r) {
if (lossless) {
pc->txfm_mode = ONLY_4X4;
} else {
pc->txfm_mode = vp9_read_literal(r, 2);
if (pc->txfm_mode == ALLOW_32X32)
pc->txfm_mode += vp9_read_bit(r);
if (pc->txfm_mode == TX_MODE_SELECT) {
int i, j;
for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
for (j = 0; j < TX_SIZE_MAX_SB - 3; ++j) {
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
pc->fc.tx_probs_8x8p[i][j] =
vp9_read_prob_diff_update(r, pc->fc.tx_probs_8x8p[i][j]);
}
}
for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
for (j = 0; j < TX_SIZE_MAX_SB - 2; ++j) {
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
pc->fc.tx_probs_16x16p[i][j] =
vp9_read_prob_diff_update(r, pc->fc.tx_probs_16x16p[i][j]);
}
}
for (i = 0; i < TX_SIZE_CONTEXTS; ++i) {
for (j = 0; j < TX_SIZE_MAX_SB - 1; ++j) {
if (vp9_read(r, VP9_MODE_UPDATE_PROB))
pc->fc.tx_probs_32x32p[i][j] =
vp9_read_prob_diff_update(r, pc->fc.tx_probs_32x32p[i][j]);
}
}
}
}
}
static int decode_uniform(vp9_reader *r, int n) {
int v;
const int l = get_unsigned_bits(n);
const int m = (1 << l) - n;
if (!l)
return 0;
v = vp9_read_literal(r, l - 1);
return v < m ? v : (v << 1) - m + vp9_read_bit(r);
}
static int decode_term_subexp(vp9_reader *r, int k, int num_syms) {
int i = 0, mk = 0, word;
while (1) {
const int b = i ? k + i - 1 : k;
const int a = 1 << b;
if (num_syms <= mk + 3 * a) {
word = decode_uniform(r, num_syms - mk) + mk;
break;
} else {
if (vp9_read_bit(r)) {
i++;
mk += a;
} else {
word = vp9_read_literal(r, b) + mk;
break;
}
}
}
return word;
}
static int decode_uniform(vp9_reader *r) {
const int l = 8;
const int m = (1 << l) - 191;
const int v = vp9_read_literal(r, l - 1);
return v < m ? v : (v << 1) - m + vp9_read_bit(r);
}
static int decode_coefs(VP9_COMMON *cm, const MACROBLOCKD *xd,
FRAME_COUNTS *counts, PLANE_TYPE type,
tran_low_t *dqcoeff, TX_SIZE tx_size, const int16_t *dq,
int ctx, const int16_t *scan, const int16_t *nb,
vp9_reader *r) {
const int max_eob = 16 << (tx_size << 1);
const FRAME_CONTEXT *const fc = cm->fc;
const int ref = is_inter_block(&xd->mi[0].src_mi->mbmi);
int band, c = 0;
const vp9_prob (*coef_probs)[COEFF_CONTEXTS][UNCONSTRAINED_NODES] =
fc->coef_probs[tx_size][type][ref];
const vp9_prob *prob;
unsigned int (*coef_counts)[COEFF_CONTEXTS][UNCONSTRAINED_NODES + 1] =
counts->coef[tx_size][type][ref];
unsigned int (*eob_branch_count)[COEFF_CONTEXTS] =
counts->eob_branch[tx_size][type][ref];
uint8_t token_cache[32 * 32];
const uint8_t *band_translate = get_band_translate(tx_size);
const int dq_shift = (tx_size == TX_32X32);
int v, token;
int16_t dqv = dq[0];
const uint8_t *cat1_prob;
const uint8_t *cat2_prob;
const uint8_t *cat3_prob;
const uint8_t *cat4_prob;
const uint8_t *cat5_prob;
const uint8_t *cat6_prob;
#if CONFIG_VP9_HIGHBITDEPTH
if (cm->use_highbitdepth) {
if (cm->bit_depth == VPX_BITS_10) {
cat1_prob = vp9_cat1_prob_high10;
cat2_prob = vp9_cat2_prob_high10;
cat3_prob = vp9_cat3_prob_high10;
cat4_prob = vp9_cat4_prob_high10;
cat5_prob = vp9_cat5_prob_high10;
cat6_prob = vp9_cat6_prob_high10;
} else {
cat1_prob = vp9_cat1_prob_high12;
cat2_prob = vp9_cat2_prob_high12;
cat3_prob = vp9_cat3_prob_high12;
cat4_prob = vp9_cat4_prob_high12;
cat5_prob = vp9_cat5_prob_high12;
cat6_prob = vp9_cat6_prob_high12;
}
} else {
cat1_prob = vp9_cat1_prob;
cat2_prob = vp9_cat2_prob;
cat3_prob = vp9_cat3_prob;
cat4_prob = vp9_cat4_prob;
cat5_prob = vp9_cat5_prob;
cat6_prob = vp9_cat6_prob;
}
#else
cat1_prob = vp9_cat1_prob;
cat2_prob = vp9_cat2_prob;
cat3_prob = vp9_cat3_prob;
cat4_prob = vp9_cat4_prob;
cat5_prob = vp9_cat5_prob;
cat6_prob = vp9_cat6_prob;
#endif
while (c < max_eob) {
int val = -1;
band = *band_translate++;
prob = coef_probs[band][ctx];
if (!cm->frame_parallel_decoding_mode)
++eob_branch_count[band][ctx];
if (!vp9_read(r, prob[EOB_CONTEXT_NODE])) {
INCREMENT_COUNT(EOB_MODEL_TOKEN);
break;
}
while (!vp9_read(r, prob[ZERO_CONTEXT_NODE])) {
INCREMENT_COUNT(ZERO_TOKEN);
dqv = dq[1];
token_cache[scan[c]] = 0;
++c;
if (c >= max_eob)
return c; // zero tokens at the end (no eob token)
ctx = get_coef_context(nb, token_cache, c);
band = *band_translate++;
prob = coef_probs[band][ctx];
}
if (!vp9_read(r, prob[ONE_CONTEXT_NODE])) {
INCREMENT_COUNT(ONE_TOKEN);
token = ONE_TOKEN;
val = 1;
} else {
INCREMENT_COUNT(TWO_TOKEN);
token = vp9_read_tree(r, coeff_subtree_high,
vp9_pareto8_full[prob[PIVOT_NODE] - 1]);
switch (token) {
case TWO_TOKEN:
case THREE_TOKEN:
case FOUR_TOKEN:
val = token;
break;
case CATEGORY1_TOKEN:
val = CAT1_MIN_VAL + read_coeff(cat1_prob, 1, r);
break;
case CATEGORY2_TOKEN:
val = CAT2_MIN_VAL + read_coeff(cat2_prob, 2, r);
break;
case CATEGORY3_TOKEN:
val = CAT3_MIN_VAL + read_coeff(cat3_prob, 3, r);
break;
case CATEGORY4_TOKEN:
val = CAT4_MIN_VAL + read_coeff(cat4_prob, 4, r);
break;
case CATEGORY5_TOKEN:
val = CAT5_MIN_VAL + read_coeff(cat5_prob, 5, r);
break;
case CATEGORY6_TOKEN:
#if CONFIG_VP9_HIGHBITDEPTH
switch (cm->bit_depth) {
case VPX_BITS_8:
val = CAT6_MIN_VAL + read_coeff(cat6_prob, 14, r);
break;
case VPX_BITS_10:
val = CAT6_MIN_VAL + read_coeff(cat6_prob, 16, r);
break;
case VPX_BITS_12:
val = CAT6_MIN_VAL + read_coeff(cat6_prob, 18, r);
break;
default:
assert(0);
return -1;
}
#else
val = CAT6_MIN_VAL + read_coeff(cat6_prob, 14, r);
#endif
break;
}
}
v = (val * dqv) >> dq_shift;
#if CONFIG_COEFFICIENT_RANGE_CHECKING
#if CONFIG_VP9_HIGHBITDEPTH
dqcoeff[scan[c]] = highbd_check_range((vp9_read_bit(r) ? -v : v),
cm->bit_depth);
#else
dqcoeff[scan[c]] = check_range(vp9_read_bit(r) ? -v : v);
#endif // CONFIG_VP9_HIGHBITDEPTH
#else
dqcoeff[scan[c]] = vp9_read_bit(r) ? -v : v;
#endif // CONFIG_COEFFICIENT_RANGE_CHECKING
token_cache[scan[c]] = vp9_pt_energy_class[token];
++c;
ctx = get_coef_context(nb, token_cache, c);
dqv = dq[1];
}
return c;
}
static TX_MODE read_tx_mode(vp9_reader *r) {
TX_MODE tx_mode = vp9_read_literal(r, 2);
if (tx_mode == ALLOW_32X32)
tx_mode += vp9_read_bit(r);
return tx_mode;
}
static INLINE COMPPREDMODE_TYPE read_comp_pred_mode(vp9_reader *r) {
COMPPREDMODE_TYPE mode = vp9_read_bit(r);
if (mode)
mode += vp9_read_bit(r);
return mode;
}
