Commit 9b180373 authored by Cheng Chen's avatar Cheng Chen Committed by sebastien alaiwan
Browse files

Refactor aom_quantize_b

Use one helper function to remove copy paste of
aom_quantize_b_c, aom_quantize_b_32x32_c, aom_quantize_b_64x64_c.
And remove redundant av1_quantize_b_c, av1_highbd_quantize_b_c.

BUG=aomedia:442

Change-Id: I3e7923a64a16af223c3e2a42dc27c0f28a9b134b
parent 2c5f4710
......@@ -195,67 +195,6 @@ void aom_highbd_quantize_dc_64x64(const tran_low_t *coeff_ptr, int skip_block,
#endif // CONFIG_TX64X64
#endif
void aom_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
const int16_t *round_ptr, const int16_t *quant_ptr,
const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
uint16_t *eob_ptr, const int16_t *scan,
const int16_t *iscan, const qm_val_t *qm_ptr,
const qm_val_t *iqm_ptr) {
int i, non_zero_count = (int)n_coeffs, eob = -1;
const int zbins[2] = { zbin_ptr[0], zbin_ptr[1] };
const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
(void)iscan;
memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
if (!skip_block) {
// Pre-scan pass
for (i = (int)n_coeffs - 1; i >= 0; i--) {
const int rc = scan[i];
const qm_val_t wt = qm_ptr[rc];
const int coeff = coeff_ptr[rc] * wt;
if (coeff < (zbins[rc != 0] << AOM_QM_BITS) &&
coeff > (nzbins[rc != 0] << AOM_QM_BITS))
non_zero_count--;
else
break;
}
// Quantization pass: All coefficients with index >= zero_flag are
// skippable. Note: zero_flag can be zero.
for (i = 0; i < non_zero_count; i++) {
const int rc = scan[i];
const qm_val_t wt = qm_ptr[rc];
const int coeff = coeff_ptr[rc];
const int coeff_sign = (coeff >> 31);
const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
int dequant;
if (abs_coeff * wt >= (zbins[rc != 0] << AOM_QM_BITS)) {
int32_t tmp32;
int64_t tmp =
clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
tmp = tmp * wt;
tmp32 = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
quant_shift_ptr[rc != 0]) >>
(16 + AOM_QM_BITS); // quantization
dequant =
(dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
AOM_QM_BITS;
qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant;
if (tmp32) eob = i;
}
}
}
*eob_ptr = eob + 1;
}
#if CONFIG_HIGHBITDEPTH
void aom_highbd_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
......@@ -316,136 +255,6 @@ void aom_highbd_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
}
#endif
void aom_quantize_b_32x32_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
const int16_t *round_ptr, const int16_t *quant_ptr,
const int16_t *quant_shift_ptr,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
const int16_t *dequant_ptr, uint16_t *eob_ptr,
const int16_t *scan, const int16_t *iscan,
const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr) {
const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 1),
ROUND_POWER_OF_TWO(zbin_ptr[1], 1) };
const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
int idx = 0;
int idx_arr[1024];
int i, eob = -1;
int dequant;
(void)iscan;
memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
if (!skip_block) {
// Pre-scan pass
for (i = 0; i < n_coeffs; i++) {
const int rc = scan[i];
const qm_val_t wt = qm_ptr[rc];
const int coeff = coeff_ptr[rc] * wt;
// If the coefficient is out of the base ZBIN range, keep it for
// quantization.
if (coeff >= (zbins[rc != 0] << AOM_QM_BITS) ||
coeff <= (nzbins[rc != 0] << AOM_QM_BITS))
idx_arr[idx++] = i;
}
// Quantization pass: only process the coefficients selected in
// pre-scan pass. Note: idx can be zero.
for (i = 0; i < idx; i++) {
const int rc = scan[idx_arr[i]];
const int coeff = coeff_ptr[rc];
const int coeff_sign = (coeff >> 31);
const qm_val_t wt = qm_ptr[rc];
int64_t tmp;
int tmp32;
int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
tmp = clamp(abs_coeff, INT16_MIN, INT16_MAX);
tmp = tmp * wt;
tmp32 = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
quant_shift_ptr[rc != 0]) >>
(15 + AOM_QM_BITS);
qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
dequant =
(dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
AOM_QM_BITS;
dqcoeff_ptr[rc] = (qcoeff_ptr[rc] * dequant) / 2;
if (tmp32) eob = idx_arr[i];
}
}
*eob_ptr = eob + 1;
}
#if CONFIG_TX64X64
void aom_quantize_b_64x64_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
const int16_t *round_ptr, const int16_t *quant_ptr,
const int16_t *quant_shift_ptr,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
const int16_t *dequant_ptr, uint16_t *eob_ptr,
const int16_t *scan, const int16_t *iscan,
const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr) {
const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 2),
ROUND_POWER_OF_TWO(zbin_ptr[1], 2) };
const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
int idx = 0;
int idx_arr[4096];
int i, eob = -1;
int dequant;
(void)iscan;
memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
if (!skip_block) {
// Pre-scan pass
for (i = 0; i < n_coeffs; i++) {
const int rc = scan[i];
const qm_val_t wt = qm_ptr[rc];
const int coeff = coeff_ptr[rc] * wt;
// If the coefficient is out of the base ZBIN range, keep it for
// quantization.
if (coeff >= (zbins[rc != 0] << AOM_QM_BITS) ||
coeff <= (nzbins[rc != 0] << AOM_QM_BITS))
idx_arr[idx++] = i;
}
// Quantization pass: only process the coefficients selected in
// pre-scan pass. Note: idx can be zero.
for (i = 0; i < idx; i++) {
const int rc = scan[idx_arr[i]];
const int coeff = coeff_ptr[rc];
const int coeff_sign = (coeff >> 31);
const qm_val_t wt = qm_ptr[rc];
int64_t tmp;
int tmp32;
int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 2);
tmp = clamp(abs_coeff, INT16_MIN, INT16_MAX);
tmp = tmp * wt;
tmp32 = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
quant_shift_ptr[rc != 0]) >>
(14 + AOM_QM_BITS);
qcoeff_ptr[rc] = (tmp32 ^ coeff_sign) - coeff_sign;
dequant =
(dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
AOM_QM_BITS;
dqcoeff_ptr[rc] = (qcoeff_ptr[rc] * dequant) / 4;
if (tmp32) eob = idx_arr[i];
}
}
*eob_ptr = eob + 1;
}
#endif // CONFIG_TX64X64
#if CONFIG_HIGHBITDEPTH
void aom_highbd_quantize_b_32x32_c(
const tran_low_t *coeff_ptr, intptr_t n_coeffs, int skip_block,
......@@ -724,16 +533,22 @@ void aom_highbd_quantize_dc_64x64(const tran_low_t *coeff_ptr, int skip_block,
#endif // CONFIG_TX64X64
#endif
void aom_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
const int16_t *round_ptr, const int16_t *quant_ptr,
const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
uint16_t *eob_ptr, const int16_t *scan,
const int16_t *iscan) {
int i, non_zero_count = (int)n_coeffs, eob = -1;
const int zbins[2] = { zbin_ptr[0], zbin_ptr[1] };
static void quantize_b_helper_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
const int16_t *round_ptr,
const int16_t *quant_ptr,
const int16_t *quant_shift_ptr,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
const int16_t *dequant_ptr, uint16_t *eob_ptr,
const int16_t *scan, const int16_t *iscan,
#if CONFIG_AOM_QM
const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr,
#endif
const int log_scale) {
const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], log_scale),
ROUND_POWER_OF_TWO(zbin_ptr[1], log_scale) };
const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
int i, non_zero_count = (int)n_coeffs, eob = -1;
(void)iscan;
memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
......@@ -743,10 +558,20 @@ void aom_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
// Pre-scan pass
for (i = (int)n_coeffs - 1; i >= 0; i--) {
const int rc = scan[i];
#if CONFIG_AOM_QM
const qm_val_t wt = qm_ptr[rc];
const int coeff = coeff_ptr[rc] * wt;
#else
const int coeff = coeff_ptr[rc];
#endif // CONFIG_AOM_QM
if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0])
#if CONFIG_AOM_QM
if (coeff < (zbins[rc != 0] << AOM_QM_BITS) &&
coeff > (nzbins[rc != 0] << AOM_QM_BITS))
non_zero_count--;
#else
if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0]) non_zero_count--;
#endif // CONFIG_AOM_QM
else
break;
}
......@@ -758,22 +583,67 @@ void aom_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
const int coeff = coeff_ptr[rc];
const int coeff_sign = (coeff >> 31);
const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
int tmp32;
#if CONFIG_AOM_QM
const qm_val_t wt = qm_ptr[rc];
if (abs_coeff * wt >= (zbins[rc != 0] << AOM_QM_BITS)) {
#else
if (abs_coeff >= zbins[rc != 0]) {
int tmp = clamp(abs_coeff + round_ptr[rc != 0], INT16_MIN, INT16_MAX);
tmp = ((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
quant_shift_ptr[rc != 0]) >>
16; // quantization
#endif // CONFIG_AOM_QM
int64_t tmp =
clamp(abs_coeff + ROUND_POWER_OF_TWO(round_ptr[rc != 0], log_scale),
INT16_MIN, INT16_MAX);
#if CONFIG_AOM_QM
const qm_val_t wt = qm_ptr[rc];
tmp *= wt;
tmp32 = (int)(((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
quant_shift_ptr[rc != 0]) >>
(16 - log_scale + AOM_QM_BITS)); // quantization
#else
tmp32 = (int)(((((tmp * quant_ptr[rc != 0]) >> 16) + tmp) *
quant_shift_ptr[rc != 0]) >>
(16 - log_scale)); // quantization
#endif // CONFIG_AOM_QM
qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0];
#if CONFIG_AOM_QM
dequant =
(dequant_ptr[rc != 0] * iqm_ptr[rc] + (1 << (AOM_QM_BITS - 1))) >>
AOM_QM_BITS;
dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant / (1 << log_scale);
#else
dqcoeff_ptr[rc] =
qcoeff_ptr[rc] * dequant_ptr[rc != 0] / (1 << log_scale);
#endif // CONFIG_AOM_QM
if (tmp) eob = i;
if (tmp32) eob = i;
}
}
}
*eob_ptr = eob + 1;
}
void aom_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
const int16_t *round_ptr, const int16_t *quant_ptr,
const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
uint16_t *eob_ptr, const int16_t *scan,
const int16_t *iscan
#if CONFIG_AOM_QM
,
const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr,
#endif
) {
quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr, round_ptr,
quant_ptr, quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr,
dequant_ptr, eob_ptr, scan, iscan,
#if CONFIG_AOM_QM
qm_ptr, iqm_ptr,
#endif
0);
}
#if CONFIG_HIGHBITDEPTH
void aom_highbd_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
......@@ -831,52 +701,19 @@ void aom_quantize_b_32x32_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
const int16_t *quant_shift_ptr,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
const int16_t *dequant_ptr, uint16_t *eob_ptr,
const int16_t *scan, const int16_t *iscan) {
const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 1),
ROUND_POWER_OF_TWO(zbin_ptr[1], 1) };
const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
int idx = 0;
int idx_arr[1024];
int i, eob = -1;
(void)iscan;
memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
if (!skip_block) {
// Pre-scan pass
for (i = 0; i < n_coeffs; i++) {
const int rc = scan[i];
const int coeff = coeff_ptr[rc];
// If the coefficient is out of the base ZBIN range, keep it for
// quantization.
if (coeff >= zbins[rc != 0] || coeff <= nzbins[rc != 0])
idx_arr[idx++] = i;
}
// Quantization pass: only process the coefficients selected in
// pre-scan pass. Note: idx can be zero.
for (i = 0; i < idx; i++) {
const int rc = scan[idx_arr[i]];
const int coeff = coeff_ptr[rc];
const int coeff_sign = (coeff >> 31);
int tmp;
int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 1);
abs_coeff = clamp(abs_coeff, INT16_MIN, INT16_MAX);
tmp = ((((abs_coeff * quant_ptr[rc != 0]) >> 16) + abs_coeff) *
quant_shift_ptr[rc != 0]) >>
15;
qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 2;
if (tmp) eob = idx_arr[i];
}
}
*eob_ptr = eob + 1;
const int16_t *scan, const int16_t *iscan
#if CONFIG_AOM_QM
,
const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr,
#endif
) {
quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr, round_ptr,
quant_ptr, quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr,
dequant_ptr, eob_ptr, scan, iscan,
#if CONFIG_AOM_QM
qm_ptr, iqm_ptr,
#endif
1);
}
#if CONFIG_TX64X64
......@@ -886,52 +723,19 @@ void aom_quantize_b_64x64_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
const int16_t *quant_shift_ptr,
tran_low_t *qcoeff_ptr, tran_low_t *dqcoeff_ptr,
const int16_t *dequant_ptr, uint16_t *eob_ptr,
const int16_t *scan, const int16_t *iscan) {
const int zbins[2] = { ROUND_POWER_OF_TWO(zbin_ptr[0], 2),
ROUND_POWER_OF_TWO(zbin_ptr[1], 2) };
const int nzbins[2] = { zbins[0] * -1, zbins[1] * -1 };
int idx = 0;
int idx_arr[4096];
int i, eob = -1;
(void)iscan;
memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
if (!skip_block) {
// Pre-scan pass
for (i = 0; i < n_coeffs; i++) {
const int rc = scan[i];
const int coeff = coeff_ptr[rc];
// If the coefficient is out of the base ZBIN range, keep it for
// quantization.
if (coeff >= zbins[rc != 0] || coeff <= nzbins[rc != 0])
idx_arr[idx++] = i;
}
// Quantization pass: only process the coefficients selected in
// pre-scan pass. Note: idx can be zero.
for (i = 0; i < idx; i++) {
const int rc = scan[idx_arr[i]];
const int coeff = coeff_ptr[rc];
const int coeff_sign = (coeff >> 31);
int tmp;
int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
abs_coeff += ROUND_POWER_OF_TWO(round_ptr[rc != 0], 2);
abs_coeff = clamp(abs_coeff, INT16_MIN, INT16_MAX);
tmp = ((((abs_coeff * quant_ptr[rc != 0]) >> 16) + abs_coeff) *
quant_shift_ptr[rc != 0]) >>
14;
qcoeff_ptr[rc] = (tmp ^ coeff_sign) - coeff_sign;
dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / 4;
if (tmp) eob = idx_arr[i];
}
}
*eob_ptr = eob + 1;
const int16_t *scan, const int16_t *iscan
#if CONFIG_AOM_QM
,
const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr,
#endif
) {
quantize_b_helper_c(coeff_ptr, n_coeffs, skip_block, zbin_ptr, round_ptr,
quant_ptr, quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr,
dequant_ptr, eob_ptr, scan, iscan,
#if CONFIG_AOM_QM
qm_ptr, iqm_ptr,
#endif
2);
}
#endif // CONFIG_TX64X64
......
......@@ -897,13 +897,43 @@ void av1_highbd_quantize_b_facade(const tran_low_t *coeff_ptr,
const qm_val_t *iqm_ptr = qparam->iqmatrix;
#endif // CONFIG_AOM_QM
av1_highbd_quantize_b(coeff_ptr, n_coeffs, skip_block, p->zbin, p->round,
p->quant, p->quant_shift, qcoeff_ptr, dqcoeff_ptr,
pd->dequant, eob_ptr, sc->scan, sc->iscan,
switch (qparam->log_scale) {
case 0:
aom_highbd_quantize_b(coeff_ptr, n_coeffs, skip_block, p->zbin, p->round,
p->quant, p->quant_shift, qcoeff_ptr, dqcoeff_ptr,
pd->dequant, eob_ptr, sc->scan, sc->iscan
#if CONFIG_AOM_QM
,
qm_ptr, iqm_ptr
#endif
);
break;
case 1:
aom_highbd_quantize_b_32x32(coeff_ptr, n_coeffs, skip_block, p->zbin,
p->round, p->quant, p->quant_shift,
qcoeff_ptr, dqcoeff_ptr, pd->dequant, eob_ptr,
sc->scan, sc->iscan
#if CONFIG_AOM_QM
qm_ptr, iqm_ptr,
,
qm_ptr, iqm_ptr
#endif
qparam->log_scale);
);
break;
#if CONFIG_TX64X64
case 2:
aom_highbd_quantize_b_64x64(coeff_ptr, n_coeffs, skip_block, p->zbin,
p->round, p->quant, p->quant_shift,
qcoeff_ptr, dqcoeff_ptr, pd->dequant, eob_ptr,
sc->scan, sc->iscan
#if CONFIG_AOM_QM
,
qm_ptr, iqm_ptr
#endif
);
break;
#endif // CONFIG_TX64X64
default: assert(0);
}
}
#if CONFIG_HIGHBITDEPTH
......@@ -1537,113 +1567,6 @@ void av1_highbd_quantize_fp_c(const tran_low_t *coeff_ptr, intptr_t count,
#endif // CONFIG_HIGHBITDEPTH
void av1_quantize_b_c(const tran_low_t *coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t *zbin_ptr,
const int16_t *round_ptr, const int16_t *quant_ptr,
const int16_t *quant_shift_ptr, tran_low_t *qcoeff_ptr,
tran_low_t *dqcoeff_ptr, const int16_t *dequant_ptr,
uint16_t *eob_ptr, const int16_t *scan,
const int16_t *iscan,
#if CONFIG_AOM_QM
const qm_val_t *qm_ptr, const qm_val_t *iqm_ptr,
#endif
int log_scale) {
int i, non_zero_count = (int)n_coeffs, eob = -1;
int zbins[2] = { zbin_ptr[0], zbin_ptr[1] };
int round[2] = { round_ptr[0], round_ptr[1] };
int nzbins[2];
int scale = 1;
int shift = 16;
(void)iscan;
if (log_scale > 0) {
zbins[0] = ROUND_POWER_OF_TWO(zbin_ptr[0], log_scale);
zbins[1] = ROUND_POWER_OF_TWO(zbin_ptr[1], log_scale);
round[0] = ROUND_POWER_OF_TWO(round_ptr[0], log_scale);
round[1] = ROUND_POWER_OF_TWO(round_ptr[1], log_scale);
scale = 1 << log_scale;
shift = 16 - log_scale;
}
nzbins[0] = zbins[0] * -1;
nzbins[1] = zbins[1] * -1;
memset(qcoeff_ptr, 0, n_coeffs * sizeof(*qcoeff_ptr));
memset(dqcoeff_ptr, 0, n_coeffs * sizeof(*dqcoeff_ptr));
if (!skip_block) {
// Pre-scan pass
for (i = (int)n_coeffs - 1; i >= 0; i--) {
const int rc = scan[i];
const int coeff = coeff_ptr[rc];
if (coeff < zbins[rc != 0] && coeff > nzbins[rc != 0])
non_zero_count--;
else
break;
}
// Quantization pass: All coefficients with index >= zero_flag are
// skippable. Note: zero_flag can be zero.
for (i = 0; i < non_zero_count; i++) {
const int rc = scan[i];
#if CONFIG_AOM_QM
const qm_val_t wt = qm_ptr[rc];
const qm_val_t iwt = iqm_ptr[rc];
const int dequant =
(dequant_ptr[rc != 0] * iwt + (1 << (AOM_QM_BITS - 1))) >>
AOM_QM_BITS;
#endif
const int coeff = coeff_ptr[rc];
const int coeff_sign = (coeff >> 31);
const int abs_coeff = (coeff ^ coeff_sign) - coeff_sign;
#if CONFIG_AOM_QM
if (abs_coeff * wt >= (zbins[rc != 0] << AOM_QM_BITS)) {
#else
if (abs_coeff >= zbins[rc != 0]) {
#endif
const int64_t tmp1 = abs_coeff + round[rc != 0];
const int64_t tmp2 = ((tmp1 * quant_ptr[rc != 0]) >> 16) + tmp1;
#if CONFIG_AOM_QM
const uint32_t abs_qcoeff = (uint32_t)(
(tmp2 * wt * quant_shift_ptr[rc != 0]) >> (AOM_QM_BITS + shift));
qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
dqcoeff_ptr[rc] = (qcoeff_ptr[rc] * dequant) / scale;
#else
const uint32_t abs_qcoeff =
(uint32_t)((tmp2 * quant_shift_ptr[rc != 0]) >> shift);
qcoeff_ptr[rc] = (tran_low_t)((abs_qcoeff ^ coeff_sign) - coeff_sign);
dqcoeff_ptr[rc] = qcoeff_ptr[rc] * dequant_ptr[rc != 0] / scale;
#endif // CONFIG_AOM_QM
if (abs_qcoeff) eob = i;
}
}