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SKP_Silk_NSQ_del_dec.go
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SKP_Silk_NSQ_del_dec.go
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package silk
import "unsafe"
type NSQ_del_dec_struct struct {
RandState [32]int32
Q_Q10 [32]int32
Xq_Q10 [32]int32
Pred_Q16 [32]int32
Shape_Q10 [32]int32
Gain_Q16 [32]int32
SAR2_Q14 [16]int32
SLPC_Q14 [152]int32
LF_AR_Q12 int32
Seed int32
SeedInit int32
RD_Q10 int32
}
type NSQ_sample_struct struct {
Q_Q10 int32
RD_Q10 int32
Xq_Q14 int32
LF_AR_Q12 int32
SLTP_shp_Q10 int32
LPC_exc_Q16 int32
}
func SKP_Silk_NSQ_del_dec(psEncC *SKP_Silk_encoder_state, psEncCtrlC *SKP_Silk_encoder_control, NSQ *SKP_Silk_nsq_state, x []int16, q []int8, LSFInterpFactor_Q2 int32, PredCoef_Q12 [32]int16, LTPCoef_Q14 [20]int16, AR2_Q13 [64]int16, HarmShapeGain_Q14 [4]int32, Tilt_Q14 [4]int32, LF_shp_Q14 [4]int32, Gains_Q16 [4]int32, Lambda_Q10 int32, LTP_scale_Q14 int32) {
var (
i int32
k int32
lag int32
start_idx int32
LSF_interpolation_flag int32
Winner_ind int32
subfr int32
last_smple_idx int32
smpl_buf_idx int32
decisionDelay int32
subfr_length int32
A_Q12 *int16
B_Q14 *int16
AR_shp_Q13 *int16
pxq *int16
sLTP_Q16 [960]int32
sLTP [960]int16
HarmShapeFIRPacked_Q14 int32
offset_Q10 int32
FiltState [16]int32
RDmin_Q10 int32
x_sc_Q10 [120]int32
psDelDec [4]NSQ_del_dec_struct
psDD *NSQ_del_dec_struct
)
subfr_length = psEncC.Frame_length / NB_SUBFR
lag = NSQ.LagPrev
memset(unsafe.Pointer(&psDelDec[0]), 0, uintptr(psEncC.NStatesDelayedDecision)*unsafe.Sizeof(NSQ_del_dec_struct{}))
for k = 0; k < psEncC.NStatesDelayedDecision; k++ {
psDD = &psDelDec[k]
psDD.Seed = (k + psEncCtrlC.Seed) & 3
psDD.SeedInit = psDD.Seed
psDD.RD_Q10 = 0
psDD.LF_AR_Q12 = NSQ.SLF_AR_shp_Q12
psDD.Shape_Q10[0] = NSQ.SLTP_shp_Q10[psEncC.Frame_length-1]
memcpy(unsafe.Pointer(&psDD.SLPC_Q14[0]), unsafe.Pointer(&NSQ.SLPC_Q14[0]), size_t(DECISION_DELAY*unsafe.Sizeof(int32(0))))
memcpy(unsafe.Pointer(&psDD.SAR2_Q14[0]), unsafe.Pointer(&NSQ.SAR2_Q14[0]), size_t(unsafe.Sizeof([16]int32{})))
}
offset_Q10 = int32(SKP_Silk_Quantization_Offsets_Q10[psEncCtrlC.Sigtype][psEncCtrlC.QuantOffsetType])
smpl_buf_idx = 0
decisionDelay = SKP_min_int(DECISION_DELAY, subfr_length)
if psEncCtrlC.Sigtype == SIG_TYPE_VOICED {
for k = 0; k < NB_SUBFR; k++ {
decisionDelay = SKP_min_int(decisionDelay, psEncCtrlC.PitchL[k]-LTP_ORDER/2-1)
}
} else {
if lag > 0 {
decisionDelay = SKP_min_int(decisionDelay, lag-LTP_ORDER/2-1)
}
}
if LSFInterpFactor_Q2 == (1 << 2) {
LSF_interpolation_flag = 0
} else {
LSF_interpolation_flag = 1
}
pxq = &NSQ.Xq[psEncC.Frame_length]
NSQ.SLTP_shp_buf_idx = psEncC.Frame_length
NSQ.SLTP_buf_idx = psEncC.Frame_length
subfr = 0
for k = 0; k < NB_SUBFR; k++ {
A_Q12 = &PredCoef_Q12[((k>>1)|(1-LSF_interpolation_flag))*MAX_LPC_ORDER]
B_Q14 = <PCoef_Q14[k*LTP_ORDER]
AR_shp_Q13 = &AR2_Q13[k*MAX_SHAPE_LPC_ORDER]
HarmShapeFIRPacked_Q14 = (HarmShapeGain_Q14[k]) >> 2
HarmShapeFIRPacked_Q14 |= ((HarmShapeGain_Q14[k]) >> 1) << 16
NSQ.Rewhite_flag = 0
if psEncCtrlC.Sigtype == SIG_TYPE_VOICED {
lag = psEncCtrlC.PitchL[k]
if (k & (3 - (LSF_interpolation_flag << 1))) == 0 {
if k == 2 {
RDmin_Q10 = psDelDec[0].RD_Q10
Winner_ind = 0
for i = 1; i < psEncC.NStatesDelayedDecision; i++ {
if psDelDec[i].RD_Q10 < RDmin_Q10 {
RDmin_Q10 = psDelDec[i].RD_Q10
Winner_ind = i
}
}
for i = 0; i < psEncC.NStatesDelayedDecision; i++ {
if i != Winner_ind {
psDelDec[i].RD_Q10 += SKP_int32_MAX >> 4
}
}
psDD = &psDelDec[Winner_ind]
last_smple_idx = smpl_buf_idx + decisionDelay
for i = 0; i < decisionDelay; i++ {
last_smple_idx = (last_smple_idx - 1) & (DECISION_DELAY - 1)
q[i-decisionDelay] = int8((psDD.Q_Q10[last_smple_idx]) >> 10)
*(*int16)(unsafe.Add(unsafe.Pointer(pxq), unsafe.Sizeof(int16(0))*uintptr(i-decisionDelay))) = SKP_SAT16(SKP_RSHIFT_ROUND(SKP_SMULWW(psDD.Xq_Q10[last_smple_idx], psDD.Gain_Q16[last_smple_idx]), 10))
NSQ.SLTP_shp_Q10[NSQ.SLTP_shp_buf_idx-decisionDelay+i] = psDD.Shape_Q10[last_smple_idx]
}
subfr = 0
}
start_idx = psEncC.Frame_length - lag - psEncC.PredictLPCOrder - LTP_ORDER/2
memset(unsafe.Pointer(&FiltState[0]), 0, size_t(uintptr(psEncC.PredictLPCOrder)*unsafe.Sizeof(int32(0))))
SKP_Silk_MA_Prediction(&NSQ.Xq[start_idx+k*psEncC.Subfr_length], A_Q12, &FiltState[0], &sLTP[start_idx], psEncC.Frame_length-start_idx, psEncC.PredictLPCOrder)
NSQ.SLTP_buf_idx = psEncC.Frame_length
NSQ.Rewhite_flag = 1
}
}
SKP_Silk_nsq_del_dec_scale_states(NSQ, psDelDec[:], x, x_sc_Q10[:], subfr_length, sLTP[:], sLTP_Q16[:], k, psEncC.NStatesDelayedDecision, smpl_buf_idx, LTP_scale_Q14, Gains_Q16, psEncCtrlC.PitchL)
SKP_Silk_noise_shape_quantizer_del_dec(NSQ, psDelDec[:], psEncCtrlC.Sigtype, x_sc_Q10[:], q, ([]int16)(pxq), sLTP_Q16[:], ([]int16)(A_Q12), ([]int16)(B_Q14), ([]int16)(AR_shp_Q13), lag, HarmShapeFIRPacked_Q14, Tilt_Q14[k], LF_shp_Q14[k], Gains_Q16[k], Lambda_Q10, offset_Q10, psEncC.Subfr_length, func() int32 {
p := &subfr
x := *p
*p++
return x
}(), psEncC.ShapingLPCOrder, psEncC.PredictLPCOrder, psEncC.Warping_Q16, psEncC.NStatesDelayedDecision, &smpl_buf_idx, decisionDelay)
x += ([]int16)(psEncC.Subfr_length)
q += ([]int8)(psEncC.Subfr_length)
pxq = (*int16)(unsafe.Add(unsafe.Pointer(pxq), unsafe.Sizeof(int16(0))*uintptr(psEncC.Subfr_length)))
}
RDmin_Q10 = psDelDec[0].RD_Q10
Winner_ind = 0
for k = 1; k < psEncC.NStatesDelayedDecision; k++ {
if psDelDec[k].RD_Q10 < RDmin_Q10 {
RDmin_Q10 = psDelDec[k].RD_Q10
Winner_ind = k
}
}
psDD = &psDelDec[Winner_ind]
psEncCtrlC.Seed = psDD.SeedInit
last_smple_idx = smpl_buf_idx + decisionDelay
for i = 0; i < decisionDelay; i++ {
last_smple_idx = (last_smple_idx - 1) & (DECISION_DELAY - 1)
q[i-decisionDelay] = int8((psDD.Q_Q10[last_smple_idx]) >> 10)
*(*int16)(unsafe.Add(unsafe.Pointer(pxq), unsafe.Sizeof(int16(0))*uintptr(i-decisionDelay))) = SKP_SAT16(SKP_RSHIFT_ROUND(SKP_SMULWW(psDD.Xq_Q10[last_smple_idx], psDD.Gain_Q16[last_smple_idx]), 10))
NSQ.SLTP_shp_Q10[NSQ.SLTP_shp_buf_idx-decisionDelay+i] = psDD.Shape_Q10[last_smple_idx]
sLTP_Q16[NSQ.SLTP_buf_idx-decisionDelay+i] = psDD.Pred_Q16[last_smple_idx]
}
memcpy(unsafe.Pointer(&NSQ.SLPC_Q14[0]), unsafe.Pointer(&psDD.SLPC_Q14[psEncC.Subfr_length]), size_t(DECISION_DELAY*unsafe.Sizeof(int32(0))))
memcpy(unsafe.Pointer(&NSQ.SAR2_Q14[0]), unsafe.Pointer(&psDD.SAR2_Q14[0]), size_t(unsafe.Sizeof([16]int32{})))
NSQ.SLF_AR_shp_Q12 = psDD.LF_AR_Q12
NSQ.LagPrev = psEncCtrlC.PitchL[NB_SUBFR-1]
memcpy(unsafe.Pointer(&NSQ.Xq[0]), unsafe.Pointer(&NSQ.Xq[psEncC.Frame_length]), size_t(uintptr(psEncC.Frame_length)*unsafe.Sizeof(int16(0))))
memcpy(unsafe.Pointer(&NSQ.SLTP_shp_Q10[0]), unsafe.Pointer(&NSQ.SLTP_shp_Q10[psEncC.Frame_length]), size_t(uintptr(psEncC.Frame_length)*unsafe.Sizeof(int32(0))))
}
func SKP_Silk_noise_shape_quantizer_del_dec(NSQ *SKP_Silk_nsq_state, psDelDec []NSQ_del_dec_struct, sigtype int32, x_Q10 []int32, q []int8, xq []int16, sLTP_Q16 []int32, a_Q12 []int16, b_Q14 []int16, AR_shp_Q13 []int16, lag int32, HarmShapeFIRPacked_Q14 int32, Tilt_Q14 int32, LF_shp_Q14 int32, Gain_Q16 int32, Lambda_Q10 int32, offset_Q10 int32, length int32, subfr int32, shapingLPCOrder int32, predictLPCOrder int32, warping_Q16 int32, nStatesDelayedDecision int32, smpl_buf_idx *int32, decisionDelay int32) {
var (
i int32
j int32
k int32
Winner_ind int32
RDmin_ind int32
RDmax_ind int32
last_smple_idx int32
Winner_rand_state int32
LTP_pred_Q14 int32
LPC_pred_Q10 int32
n_AR_Q10 int32
n_LTP_Q14 int32
n_LF_Q10 int32
r_Q10 int32
rr_Q20 int32
rd1_Q10 int32
rd2_Q10 int32
RDmin_Q10 int32
RDmax_Q10 int32
q1_Q10 int32
q2_Q10 int32
dither int32
exc_Q10 int32
LPC_exc_Q10 int32
xq_Q10 int32
tmp1 int32
tmp2 int32
sLF_AR_shp_Q10 int32
pred_lag_ptr *int32
shp_lag_ptr *int32
psLPC_Q14 *int32
psSampleState [4][2]NSQ_sample_struct
psDD *NSQ_del_dec_struct
psSS *NSQ_sample_struct
)
shp_lag_ptr = &NSQ.SLTP_shp_Q10[NSQ.SLTP_shp_buf_idx-lag+HARM_SHAPE_FIR_TAPS/2]
pred_lag_ptr = &sLTP_Q16[NSQ.SLTP_buf_idx-lag+LTP_ORDER/2]
for i = 0; i < length; i++ {
if sigtype == SIG_TYPE_VOICED {
LTP_pred_Q14 = SKP_SMULWB(*(*int32)(unsafe.Add(unsafe.Pointer(pred_lag_ptr), unsafe.Sizeof(int32(0))*0)), int32(b_Q14[0]))
LTP_pred_Q14 = SKP_SMLAWB(LTP_pred_Q14, *(*int32)(unsafe.Add(unsafe.Pointer(pred_lag_ptr), -int(unsafe.Sizeof(int32(0))*1))), int32(b_Q14[1]))
LTP_pred_Q14 = SKP_SMLAWB(LTP_pred_Q14, *(*int32)(unsafe.Add(unsafe.Pointer(pred_lag_ptr), -int(unsafe.Sizeof(int32(0))*2))), int32(b_Q14[2]))
LTP_pred_Q14 = SKP_SMLAWB(LTP_pred_Q14, *(*int32)(unsafe.Add(unsafe.Pointer(pred_lag_ptr), -int(unsafe.Sizeof(int32(0))*3))), int32(b_Q14[3]))
LTP_pred_Q14 = SKP_SMLAWB(LTP_pred_Q14, *(*int32)(unsafe.Add(unsafe.Pointer(pred_lag_ptr), -int(unsafe.Sizeof(int32(0))*4))), int32(b_Q14[4]))
pred_lag_ptr = (*int32)(unsafe.Add(unsafe.Pointer(pred_lag_ptr), unsafe.Sizeof(int32(0))*1))
} else {
LTP_pred_Q14 = 0
}
if lag > 0 {
n_LTP_Q14 = SKP_SMULWB((*(*int32)(unsafe.Add(unsafe.Pointer(shp_lag_ptr), unsafe.Sizeof(int32(0))*0)))+(*(*int32)(unsafe.Add(unsafe.Pointer(shp_lag_ptr), -int(unsafe.Sizeof(int32(0))*2)))), HarmShapeFIRPacked_Q14)
n_LTP_Q14 = SKP_SMLAWT(n_LTP_Q14, *(*int32)(unsafe.Add(unsafe.Pointer(shp_lag_ptr), -int(unsafe.Sizeof(int32(0))*1))), HarmShapeFIRPacked_Q14)
n_LTP_Q14 = n_LTP_Q14 << 6
shp_lag_ptr = (*int32)(unsafe.Add(unsafe.Pointer(shp_lag_ptr), unsafe.Sizeof(int32(0))*1))
} else {
n_LTP_Q14 = 0
}
for k = 0; k < nStatesDelayedDecision; k++ {
psDD = &psDelDec[k]
psSS = &psSampleState[k][0]
psDD.Seed = int32((uint32(psDD.Seed) * 0xBB38435) + 0x3619636B)
dither = psDD.Seed >> 31
psLPC_Q14 = &psDD.SLPC_Q14[DECISION_DELAY-1+i]
LPC_pred_Q10 = SKP_SMULWB(*(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), unsafe.Sizeof(int32(0))*0)), int32(a_Q12[0]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*1))), int32(a_Q12[1]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*2))), int32(a_Q12[2]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*3))), int32(a_Q12[3]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*4))), int32(a_Q12[4]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*5))), int32(a_Q12[5]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*6))), int32(a_Q12[6]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*7))), int32(a_Q12[7]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*8))), int32(a_Q12[8]))
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*9))), int32(a_Q12[9]))
for j = 10; j < predictLPCOrder; j++ {
LPC_pred_Q10 = SKP_SMLAWB(LPC_pred_Q10, *(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), -int(unsafe.Sizeof(int32(0))*uintptr(j)))), int32(a_Q12[j]))
}
tmp2 = SKP_SMLAWB(*(*int32)(unsafe.Add(unsafe.Pointer(psLPC_Q14), unsafe.Sizeof(int32(0))*0)), psDD.SAR2_Q14[0], warping_Q16)
tmp1 = SKP_SMLAWB(psDD.SAR2_Q14[0], psDD.SAR2_Q14[1]-tmp2, warping_Q16)
psDD.SAR2_Q14[0] = tmp2
n_AR_Q10 = SKP_SMULWB(tmp2, int32(AR_shp_Q13[0]))
for j = 2; j < shapingLPCOrder; j += 2 {
tmp2 = SKP_SMLAWB(psDD.SAR2_Q14[j-1], psDD.SAR2_Q14[j+0]-tmp1, warping_Q16)
psDD.SAR2_Q14[j-1] = tmp1
n_AR_Q10 = SKP_SMLAWB(n_AR_Q10, tmp1, int32(AR_shp_Q13[j-1]))
tmp1 = SKP_SMLAWB(psDD.SAR2_Q14[j+0], psDD.SAR2_Q14[j+1]-tmp2, warping_Q16)
psDD.SAR2_Q14[j+0] = tmp2
n_AR_Q10 = SKP_SMLAWB(n_AR_Q10, tmp2, int32(AR_shp_Q13[j]))
}
psDD.SAR2_Q14[shapingLPCOrder-1] = tmp1
n_AR_Q10 = SKP_SMLAWB(n_AR_Q10, tmp1, int32(AR_shp_Q13[shapingLPCOrder-1]))
n_AR_Q10 = n_AR_Q10 >> 1
n_AR_Q10 = SKP_SMLAWB(n_AR_Q10, psDD.LF_AR_Q12, Tilt_Q14)
n_LF_Q10 = SKP_SMULWB(psDD.Shape_Q10[*smpl_buf_idx], LF_shp_Q14) << 2
n_LF_Q10 = SKP_SMLAWT(n_LF_Q10, psDD.LF_AR_Q12, LF_shp_Q14)
tmp1 = LTP_pred_Q14 - n_LTP_Q14
tmp1 = tmp1 >> 4
tmp1 = tmp1 + LPC_pred_Q10
tmp1 = tmp1 - n_AR_Q10
tmp1 = tmp1 - n_LF_Q10
r_Q10 = (x_Q10[i]) - tmp1
r_Q10 = (r_Q10 ^ dither) - dither
r_Q10 = r_Q10 - offset_Q10
r_Q10 = SKP_LIMIT_32(r_Q10, int32(-64<<10), 64<<10)
if int64(r_Q10) < -1536 {
q1_Q10 = SKP_RSHIFT_ROUND(r_Q10, 10) << 10
r_Q10 = r_Q10 - q1_Q10
rd1_Q10 = SKP_SMLABB((-(q1_Q10+offset_Q10))*Lambda_Q10, r_Q10, r_Q10) >> 10
rd2_Q10 = rd1_Q10 + 1024
rd2_Q10 = rd2_Q10 - (Lambda_Q10 + (r_Q10 << 1))
q2_Q10 = q1_Q10 + 1024
} else if r_Q10 > 512 {
q1_Q10 = SKP_RSHIFT_ROUND(r_Q10, 10) << 10
r_Q10 = r_Q10 - q1_Q10
rd1_Q10 = SKP_SMLABB((q1_Q10+offset_Q10)*Lambda_Q10, r_Q10, r_Q10) >> 10
rd2_Q10 = rd1_Q10 + 1024
rd2_Q10 = rd2_Q10 - (Lambda_Q10 - (r_Q10 << 1))
q2_Q10 = q1_Q10 - 1024
} else {
rr_Q20 = SKP_SMULBB(offset_Q10, Lambda_Q10)
rd2_Q10 = SKP_SMLABB(rr_Q20, r_Q10, r_Q10) >> 10
rd1_Q10 = rd2_Q10 + 1024
rd1_Q10 = rd1_Q10 + ((Lambda_Q10 + (r_Q10 << 1)) - (rr_Q20 >> 9))
q1_Q10 = -1024
q2_Q10 = 0
}
if rd1_Q10 < rd2_Q10 {
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).RD_Q10 = psDD.RD_Q10 + rd1_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).RD_Q10 = psDD.RD_Q10 + rd2_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).Q_Q10 = q1_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).Q_Q10 = q2_Q10
} else {
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).RD_Q10 = psDD.RD_Q10 + rd2_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).RD_Q10 = psDD.RD_Q10 + rd1_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).Q_Q10 = q2_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).Q_Q10 = q1_Q10
}
exc_Q10 = offset_Q10 + (*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).Q_Q10
exc_Q10 = (exc_Q10 ^ dither) - dither
LPC_exc_Q10 = exc_Q10 + SKP_RSHIFT_ROUND(LTP_pred_Q14, 4)
xq_Q10 = LPC_exc_Q10 + LPC_pred_Q10
sLF_AR_shp_Q10 = xq_Q10 - n_AR_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).SLTP_shp_Q10 = sLF_AR_shp_Q10 - n_LF_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).LF_AR_Q12 = sLF_AR_shp_Q10 << 2
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).Xq_Q14 = xq_Q10 << 4
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*0))).LPC_exc_Q16 = LPC_exc_Q10 << 6
exc_Q10 = offset_Q10 + (*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).Q_Q10
exc_Q10 = (exc_Q10 ^ dither) - dither
LPC_exc_Q10 = exc_Q10 + SKP_RSHIFT_ROUND(LTP_pred_Q14, 4)
xq_Q10 = LPC_exc_Q10 + LPC_pred_Q10
sLF_AR_shp_Q10 = xq_Q10 - n_AR_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).SLTP_shp_Q10 = sLF_AR_shp_Q10 - n_LF_Q10
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).LF_AR_Q12 = sLF_AR_shp_Q10 << 2
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).Xq_Q14 = xq_Q10 << 4
(*(*NSQ_sample_struct)(unsafe.Add(unsafe.Pointer(psSS), unsafe.Sizeof(NSQ_sample_struct{})*1))).LPC_exc_Q16 = LPC_exc_Q10 << 6
}
*smpl_buf_idx = (*smpl_buf_idx - 1) & (DECISION_DELAY - 1)
last_smple_idx = (*smpl_buf_idx + decisionDelay) & (DECISION_DELAY - 1)
RDmin_Q10 = psSampleState[0][0].RD_Q10
Winner_ind = 0
for k = 1; k < nStatesDelayedDecision; k++ {
if psSampleState[k][0].RD_Q10 < RDmin_Q10 {
RDmin_Q10 = psSampleState[k][0].RD_Q10
Winner_ind = k
}
}
Winner_rand_state = psDelDec[Winner_ind].RandState[last_smple_idx]
for k = 0; k < nStatesDelayedDecision; k++ {
if psDelDec[k].RandState[last_smple_idx] != Winner_rand_state {
psSampleState[k][0].RD_Q10 = psSampleState[k][0].RD_Q10 + (SKP_int32_MAX >> 4)
psSampleState[k][1].RD_Q10 = psSampleState[k][1].RD_Q10 + (SKP_int32_MAX >> 4)
}
}
RDmax_Q10 = psSampleState[0][0].RD_Q10
RDmin_Q10 = psSampleState[0][1].RD_Q10
RDmax_ind = 0
RDmin_ind = 0
for k = 1; k < nStatesDelayedDecision; k++ {
if psSampleState[k][0].RD_Q10 > RDmax_Q10 {
RDmax_Q10 = psSampleState[k][0].RD_Q10
RDmax_ind = k
}
if psSampleState[k][1].RD_Q10 < RDmin_Q10 {
RDmin_Q10 = psSampleState[k][1].RD_Q10
RDmin_ind = k
}
}
if RDmin_Q10 < RDmax_Q10 {
SKP_Silk_copy_del_dec_state(&psDelDec[RDmax_ind], &psDelDec[RDmin_ind], i)
memcpy(unsafe.Pointer(&psSampleState[RDmax_ind][0]), unsafe.Pointer(&psSampleState[RDmin_ind][1]), size_t(unsafe.Sizeof(NSQ_sample_struct{})))
}
psDD = &psDelDec[Winner_ind]
if subfr > 0 || i >= decisionDelay {
q[i-decisionDelay] = int8((psDD.Q_Q10[last_smple_idx]) >> 10)
xq[i-decisionDelay] = SKP_SAT16(SKP_RSHIFT_ROUND(SKP_SMULWW(psDD.Xq_Q10[last_smple_idx], psDD.Gain_Q16[last_smple_idx]), 10))
NSQ.SLTP_shp_Q10[NSQ.SLTP_shp_buf_idx-decisionDelay] = psDD.Shape_Q10[last_smple_idx]
sLTP_Q16[NSQ.SLTP_buf_idx-decisionDelay] = psDD.Pred_Q16[last_smple_idx]
}
NSQ.SLTP_shp_buf_idx++
NSQ.SLTP_buf_idx++
for k = 0; k < nStatesDelayedDecision; k++ {
psDD = &psDelDec[k]
psSS = &psSampleState[k][0]
psDD.LF_AR_Q12 = psSS.LF_AR_Q12
psDD.SLPC_Q14[DECISION_DELAY+i] = psSS.Xq_Q14
psDD.Xq_Q10[*smpl_buf_idx] = psSS.Xq_Q14 >> 4
psDD.Q_Q10[*smpl_buf_idx] = psSS.Q_Q10
psDD.Pred_Q16[*smpl_buf_idx] = psSS.LPC_exc_Q16
psDD.Shape_Q10[*smpl_buf_idx] = psSS.SLTP_shp_Q10
psDD.Seed = psDD.Seed + (psSS.Q_Q10 >> 10)
psDD.RandState[*smpl_buf_idx] = psDD.Seed
psDD.RD_Q10 = psSS.RD_Q10
psDD.Gain_Q16[*smpl_buf_idx] = Gain_Q16
}
}
for k = 0; k < nStatesDelayedDecision; k++ {
psDD = &psDelDec[k]
memcpy(unsafe.Pointer(&psDD.SLPC_Q14[0]), unsafe.Pointer(&psDD.SLPC_Q14[length]), size_t(DECISION_DELAY*unsafe.Sizeof(int32(0))))
}
}
func SKP_Silk_nsq_del_dec_scale_states(NSQ *SKP_Silk_nsq_state, psDelDec []NSQ_del_dec_struct, x []int16, x_sc_Q10 []int32, subfr_length int32, sLTP []int16, sLTP_Q16 []int32, subfr int32, nStatesDelayedDecision int32, smpl_buf_idx int32, LTP_scale_Q14 int32, Gains_Q16 [4]int32, pitchL [4]int32) {
var (
i int32
k int32
lag int32
inv_gain_Q16 int32
gain_adj_Q16 int32
inv_gain_Q32 int32
psDD *NSQ_del_dec_struct
)
inv_gain_Q16 = SKP_INVERSE32_varQ(func() int32 {
if (Gains_Q16[subfr]) > 1 {
return Gains_Q16[subfr]
}
return 1
}(), 32)
if inv_gain_Q16 < SKP_int16_MAX {
inv_gain_Q16 = inv_gain_Q16
} else {
inv_gain_Q16 = SKP_int16_MAX
}
lag = pitchL[subfr]
if NSQ.Rewhite_flag != 0 {
inv_gain_Q32 = inv_gain_Q16 << 16
if subfr == 0 {
inv_gain_Q32 = SKP_SMULWB(inv_gain_Q32, LTP_scale_Q14) << 2
}
for i = NSQ.SLTP_buf_idx - lag - LTP_ORDER/2; i < NSQ.SLTP_buf_idx; i++ {
sLTP_Q16[i] = SKP_SMULWB(inv_gain_Q32, int32(sLTP[i]))
}
}
if inv_gain_Q16 != NSQ.Prev_inv_gain_Q16 {
gain_adj_Q16 = SKP_DIV32_varQ(inv_gain_Q16, NSQ.Prev_inv_gain_Q16, 16)
for i = NSQ.SLTP_shp_buf_idx - subfr_length*NB_SUBFR; i < NSQ.SLTP_shp_buf_idx; i++ {
NSQ.SLTP_shp_Q10[i] = SKP_SMULWW(gain_adj_Q16, NSQ.SLTP_shp_Q10[i])
}
if NSQ.Rewhite_flag == 0 {
for i = NSQ.SLTP_buf_idx - lag - LTP_ORDER/2; i < NSQ.SLTP_buf_idx; i++ {
sLTP_Q16[i] = SKP_SMULWW(gain_adj_Q16, sLTP_Q16[i])
}
}
for k = 0; k < nStatesDelayedDecision; k++ {
psDD = &psDelDec[k]
psDD.LF_AR_Q12 = SKP_SMULWW(gain_adj_Q16, psDD.LF_AR_Q12)
for i = 0; i < DECISION_DELAY; i++ {
psDD.SLPC_Q14[i] = SKP_SMULWW(gain_adj_Q16, psDD.SLPC_Q14[i])
}
for i = 0; i < MAX_SHAPE_LPC_ORDER; i++ {
psDD.SAR2_Q14[i] = SKP_SMULWW(gain_adj_Q16, psDD.SAR2_Q14[i])
}
for i = 0; i < DECISION_DELAY; i++ {
psDD.Pred_Q16[i] = SKP_SMULWW(gain_adj_Q16, psDD.Pred_Q16[i])
psDD.Shape_Q10[i] = SKP_SMULWW(gain_adj_Q16, psDD.Shape_Q10[i])
}
}
}
for i = 0; i < subfr_length; i++ {
x_sc_Q10[i] = SKP_SMULBB(int32(x[i]), int32(int16(inv_gain_Q16))) >> 6
}
NSQ.Prev_inv_gain_Q16 = inv_gain_Q16
}
func SKP_Silk_copy_del_dec_state(DD_dst *NSQ_del_dec_struct, DD_src *NSQ_del_dec_struct, LPC_state_idx int32) {
memcpy(unsafe.Pointer(&DD_dst.RandState[0]), unsafe.Pointer(&DD_src.RandState[0]), size_t(unsafe.Sizeof([32]int32{})))
memcpy(unsafe.Pointer(&DD_dst.Q_Q10[0]), unsafe.Pointer(&DD_src.Q_Q10[0]), size_t(unsafe.Sizeof([32]int32{})))
memcpy(unsafe.Pointer(&DD_dst.Pred_Q16[0]), unsafe.Pointer(&DD_src.Pred_Q16[0]), size_t(unsafe.Sizeof([32]int32{})))
memcpy(unsafe.Pointer(&DD_dst.Shape_Q10[0]), unsafe.Pointer(&DD_src.Shape_Q10[0]), size_t(unsafe.Sizeof([32]int32{})))
memcpy(unsafe.Pointer(&DD_dst.Xq_Q10[0]), unsafe.Pointer(&DD_src.Xq_Q10[0]), size_t(unsafe.Sizeof([32]int32{})))
memcpy(unsafe.Pointer(&DD_dst.SAR2_Q14[0]), unsafe.Pointer(&DD_src.SAR2_Q14[0]), size_t(unsafe.Sizeof([16]int32{})))
memcpy(unsafe.Pointer(&DD_dst.SLPC_Q14[LPC_state_idx]), unsafe.Pointer(&DD_src.SLPC_Q14[LPC_state_idx]), size_t(DECISION_DELAY*unsafe.Sizeof(int32(0))))
DD_dst.LF_AR_Q12 = DD_src.LF_AR_Q12
DD_dst.Seed = DD_src.Seed
DD_dst.SeedInit = DD_src.SeedInit
DD_dst.RD_Q10 = DD_src.RD_Q10
}