/*************************************************************************
* FUNCTION: Q_plsf_5()
*
* PURPOSE: Quantization of 2 sets of LSF parameters using 1st order MA
* prediction and split by 5 matrix quantization (split-MQ)
*
* DESCRIPTION:
*
* p[i] = pred_factor*past_rq[i]; i=0,...,m-1
* r1[i]= lsf1[i] - p[i]; i=0,...,m-1
* r2[i]= lsf2[i] - p[i]; i=0,...,m-1
* where:
* lsf1[i] 1st mean-removed LSF vector.
* lsf2[i] 2nd mean-removed LSF vector.
* r1[i] 1st residual prediction vector.
* r2[i] 2nd residual prediction vector.
* past_r2q[i] Past quantized residual (2nd vector).
*
* The residual vectors r1[i] and r2[i] are jointly quantized using
* split-MQ with 5 codebooks. Each 4th dimension submatrix contains 2
* elements from each residual vector. The 5 submatrices are as follows:
* {r1[0], r1[1], r2[0], r2[1]}; {r1[2], r1[3], r2[2], r2[3]};
* {r1[4], r1[5], r2[4], r2[5]}; {r1[6], r1[7], r2[6], r2[7]};
* {r1[8], r1[9], r2[8], r2[9]};
*
*************************************************************************/
void Q_plsf_5 (
Q_plsfState *st,
Word16 *lsp1, /* i : 1st LSP vector, Q15 */
Word16 *lsp2, /* i : 2nd LSP vector, Q15 */
Word16 *lsp1_q, /* o : quantized 1st LSP vector, Q15 */
Word16 *lsp2_q, /* o : quantized 2nd LSP vector, Q15 */
Word16 *indice /* o : quantization indices of 5 matrices, Q0 */
)
{
Word16 i;
Word16 lsf1[M], lsf2[M], wf1[M], wf2[M], lsf_p[M], lsf_r1[M], lsf_r2[M];
Word16 lsf1_q[M], lsf2_q[M];
/* convert LSFs to normalize frequency domain 0..16384 */
Lsp_lsf (lsp1, lsf1, M);
Lsp_lsf (lsp2, lsf2, M);
/* Compute LSF weighting factors (Q13) */
Lsf_wt (lsf1, wf1);
Lsf_wt (lsf2, wf2);
/* Compute predicted LSF and prediction error */
for (i = 0; i < M; i++)
{
lsf_p[i] = add (mean_lsf[i], mult (st->past_rq[i], LSP_PRED_FAC_MR122));
move16 ();
lsf_r1[i] = sub (lsf1[i], lsf_p[i]); move16 ();
lsf_r2[i] = sub (lsf2[i], lsf_p[i]); move16 ();
}
/*---- Split-MQ of prediction error ----*/
indice[0] = Vq_subvec (&lsf_r1[0], &lsf_r2[0], dico1_lsf,
&wf1[0], &wf2[0], DICO1_SIZE);
move16 ();
indice[1] = Vq_subvec (&lsf_r1[2], &lsf_r2[2], dico2_lsf,
&wf1[2], &wf2[2], DICO2_SIZE);
move16 ();
indice[2] = Vq_subvec_s (&lsf_r1[4], &lsf_r2[4], dico3_lsf,
&wf1[4], &wf2[4], DICO3_SIZE);
move16 ();
indice[3] = Vq_subvec (&lsf_r1[6], &lsf_r2[6], dico4_lsf,
&wf1[6], &wf2[6], DICO4_SIZE);
move16 ();
indice[4] = Vq_subvec (&lsf_r1[8], &lsf_r2[8], dico5_lsf,
&wf1[8], &wf2[8], DICO5_SIZE);
move16 ();
/* Compute quantized LSFs and update the past quantized residual */
for (i = 0; i < M; i++)
{
lsf1_q[i] = add (lsf_r1[i], lsf_p[i]); move16 ();
lsf2_q[i] = add (lsf_r2[i], lsf_p[i]); move16 ();
st->past_rq[i] = lsf_r2[i]; move16 ();
}
/* verification that LSFs has minimum distance of LSF_GAP */
Reorder_lsf (lsf1_q, LSF_GAP, M);
Reorder_lsf (lsf2_q, LSF_GAP, M);
/* convert LSFs to the cosine domain */
Lsf_lsp (lsf1_q, lsp1_q, M);
Lsf_lsp (lsf2_q, lsp2_q, M);
}
void D_plsf_5 (
INT16 *indice, /* input : quantization indices of 5 submatrices */
INT16 *lsp1_q, /* output: quantized 1st LSP vector */
INT16 *lsp2_q, /* output: quantized 2nd LSP vector */
INT16 bfi, /* input : bad frame indicator (set to 1 if a bad
frame is received) */
INT16 rxdtx_ctrl, /* input : RX DTX control word */
INT16 rx_dtx_state /* input : state of the comfort noise insertion
period */
)
{
INT16 i;
const INT16 *p_dico;
INT16 temp, sign;
INT16 lsf1_r[M], lsf2_r[M];
INT16 lsf1_q[M], lsf2_q[M];
VPP_EFR_PROFILE_FUNCTION_ENTER(D_plsf_5);
/* Update comfort noise LSF quantizer memory */
if ((rxdtx_ctrl & RX_UPD_SID_QUANT_MEM) != 0)
{
update_lsf_p_CN (lsf_old_rx, lsf_p_CN);
}
/* Handle cases of comfort noise LSF decoding in which past
valid SID frames are repeated */
if (((rxdtx_ctrl & RX_NO_TRANSMISSION) != 0)
|| ((rxdtx_ctrl & RX_INVALID_SID_FRAME) != 0)
|| ((rxdtx_ctrl & RX_LOST_SID_FRAME) != 0))
{
if ((rxdtx_ctrl & RX_NO_TRANSMISSION) != 0)
{
/* DTX active: no transmission. Interpolate LSF values in memory */
interpolate_CN_lsf (lsf_old_CN, lsf_new_CN, lsf2_q, rx_dtx_state);
}
else
{ /* Invalid or lost SID frame: use LSFs
from last good SID frame */
for (i = 0; i < M; i++)
{
lsf_old_CN[i] = lsf_new_CN[i];
lsf2_q[i] = lsf_new_CN[i];
past_r2_q[i] = 0;
}
}
for (i = 0; i < M; i++)
{
past_lsf_q[i] = lsf2_q[i];
}
/* convert LSFs to the cosine domain */
Lsf_lsp (lsf2_q, lsp2_q, M);
VPP_EFR_PROFILE_FUNCTION_EXIT(D_plsf_5);
return;
}
if (bfi != 0) /* if bad frame */
{
/* use the past LSFs slightly shifted towards their mean */
for (i = 0; i < M; i++)
{
/* lsfi_q[i] = ALPHA*past_lsf_q[i] + ONE_ALPHA*mean_lsf[i]; */
/*lsf1_q[i] = add (mult (past_lsf_q[i], ALPHA),
mult (mean_lsf[i], ONE_ALPHA));*/
lsf1_q[i] = ADD (MULT (past_lsf_q[i], ALPHA),
MULT (mean_lsf[i], ONE_ALPHA));
lsf2_q[i] = lsf1_q[i];
}
/* estimate past quantized residual to be used in next frame */
for (i = 0; i < M; i++)
{
/* temp = mean_lsf[i] + past_r2_q[i] * PRED_FAC; */
//temp = add (mean_lsf[i], mult (past_r2_q[i], PRED_FAC));
temp = ADD (mean_lsf[i], MULT (past_r2_q[i], PRED_FAC));
//past_r2_q[i] = sub (lsf2_q[i], temp);
past_r2_q[i] = SUB (lsf2_q[i], temp);
}
}
else
/* if good LSFs received */
{
/* decode prediction residuals from 5 received indices */
//p_dico = &dico1_lsf[shl (indice[0], 2)];
p_dico = &dico1_lsf[SHL(indice[0], 2)];
lsf1_r[0] = *p_dico++;
lsf1_r[1] = *p_dico++;
lsf2_r[0] = *p_dico++;
lsf2_r[1] = *p_dico++;
//p_dico = &dico2_lsf[shl (indice[1], 2)];
p_dico = &dico2_lsf[SHL(indice[1], 2)];
lsf1_r[2] = *p_dico++;
lsf1_r[3] = *p_dico++;
lsf2_r[2] = *p_dico++;
lsf2_r[3] = *p_dico++;
sign = indice[2] & 1;
//i = shr (indice[2], 1);
i = SHR_D(indice[2], 1);
//p_dico = &dico3_lsf[shl (i, 2)];
p_dico = &dico3_lsf[SHL(i, 2)];
if (sign == 0)
{
lsf1_r[4] = *p_dico++;
lsf1_r[5] = *p_dico++;
lsf2_r[4] = *p_dico++;
lsf2_r[5] = *p_dico++;
}
else
{
//lsf1_r[4] = negate(*p_dico++);
lsf1_r[4] = NEGATE(*p_dico);
*p_dico++;
//lsf1_r[5] = negate(*p_dico++);
lsf1_r[5] = NEGATE(*p_dico);
*p_dico++;
//lsf2_r[4] = negate(*p_dico++);
lsf2_r[4] = NEGATE(*p_dico);
*p_dico++;
//lsf2_r[5] = negate(*p_dico++);
lsf2_r[5] = NEGATE(*p_dico);
*p_dico++;
}
//p_dico = &dico4_lsf[shl (indice[3], 2)];
p_dico = &dico4_lsf[SHL(indice[3], 2)];
lsf1_r[6] = *p_dico++;
lsf1_r[7] = *p_dico++;
lsf2_r[6] = *p_dico++;
lsf2_r[7] = *p_dico++;
//p_dico = &dico5_lsf[shl (indice[4], 2)];
p_dico = &dico5_lsf[SHL(indice[4], 2)];
lsf1_r[8] = *p_dico++;
lsf1_r[9] = *p_dico++;
lsf2_r[8] = *p_dico++;
lsf2_r[9] = *p_dico++;
/* Compute quantized LSFs and update the past quantized residual */
/* Use lsf_p_CN as predicted LSF vector in case of no speech
activity */
if ((rxdtx_ctrl & RX_SP_FLAG) != 0)
{
for (i = 0; i < M; i++)
{
//temp = add (mean_lsf[i], mult (past_r2_q[i], PRED_FAC));
temp = ADD (mean_lsf[i], MULT (past_r2_q[i], PRED_FAC));
//lsf1_q[i] = add (lsf1_r[i], temp);
lsf1_q[i] = ADD (lsf1_r[i], temp);
//lsf2_q[i] = add (lsf2_r[i], temp);
lsf2_q[i] = ADD (lsf2_r[i], temp);
past_r2_q[i] = lsf2_r[i];
}
}
else
{ /* Valid SID frame */
for (i = 0; i < M; i++)
{
//lsf2_q[i] = add (lsf2_r[i], lsf_p_CN[i]);
lsf2_q[i] = ADD (lsf2_r[i], lsf_p_CN[i]);
/* Use the dequantized values of lsf2 also for lsf1 */
lsf1_q[i] = lsf2_q[i];
past_r2_q[i] = 0;
}
}
}
/* verification that LSFs have minimum distance of LSF_GAP Hz */
Reorder_lsf (lsf1_q, LSF_GAP, M);
Reorder_lsf (lsf2_q, LSF_GAP, M);
if ((rxdtx_ctrl & RX_FIRST_SID_UPDATE) != 0)
{
for (i = 0; i < M; i++)
{
lsf_new_CN[i] = lsf2_q[i];
}
}
if ((rxdtx_ctrl & RX_CONT_SID_UPDATE) != 0)
{
for (i = 0; i < M; i++)
{
lsf_old_CN[i] = lsf_new_CN[i];
lsf_new_CN[i] = lsf2_q[i];
}
}
if ((rxdtx_ctrl & RX_SP_FLAG) != 0)
{
/* Update lsf history with quantized LSFs
when speech activity is present. If the current frame is
a bad one, update with most recent good comfort noise LSFs */
if (bfi==0)
{
update_lsf_history (lsf1_q, lsf2_q, lsf_old_rx);
}
else
{
update_lsf_history (lsf_new_CN, lsf_new_CN, lsf_old_rx);
}
for (i = 0; i < M; i++)
{
lsf_old_CN[i] = lsf2_q[i];
}
}
else
{
interpolate_CN_lsf (lsf_old_CN, lsf_new_CN, lsf2_q, rx_dtx_state);
}
for (i = 0; i < M; i++)
{
past_lsf_q[i] = lsf2_q[i];
}
/* convert LSFs to the cosine domain */
Lsf_lsp (lsf1_q, lsp1_q, M);
Lsf_lsp (lsf2_q, lsp2_q, M);
VPP_EFR_PROFILE_FUNCTION_EXIT(D_plsf_5);
return;
}
/*
**************************************************************************
*
* Function : dtx_dec
*
**************************************************************************
*/
int dtx_dec(
dtx_decState *st, /* i/o : State struct */
Word16 mem_syn[], /* i/o : AMR decoder state */
D_plsfState* lsfState, /* i/o : decoder lsf states */
gc_predState* predState, /* i/o : prediction states */
Cb_gain_averageState* averState, /* i/o : CB gain average states */
enum DTXStateType new_state, /* i : new DTX state */
enum Mode mode, /* i : AMR mode */
Word16 parm[], /* i : Vector of synthesis parameters */
Word16 synth[], /* o : synthesised speech */
Word16 A_t[] /* o : decoded LP filter in 4 subframes*/
)
{
Word16 log_en_index;
Word16 i, j;
Word16 int_fac;
Word32 L_log_en_int;
Word16 lsp_int[M];
Word16 log_en_int_e;
Word16 log_en_int_m;
Word16 level;
Word16 acoeff[M + 1];
Word16 refl[M];
Word16 pred_err;
Word16 ex[L_SUBFR];
Word16 ma_pred_init;
Word16 log_pg_e, log_pg_m;
Word16 log_pg;
Flag negative;
Word16 lsf_mean;
Word32 L_lsf_mean;
Word16 lsf_variab_index;
Word16 lsf_variab_factor;
Word16 lsf_int[M];
Word16 lsf_int_variab[M];
Word16 lsp_int_variab[M];
Word16 acoeff_variab[M + 1];
Word16 lsf[M];
Word32 L_lsf[M];
Word16 ptr;
Word16 tmp_int_length;
/* This function is called if synthesis state is not SPEECH
* the globally passed inputs to this function are
* st->sid_frame
* st->valid_data
* st->dtxHangoverAdded
* new_state (SPEECH, DTX, DTX_MUTE)
*/
test(); test();
if ((st->dtxHangoverAdded != 0) &&
(st->sid_frame != 0))
{
/* sid_first after dtx hangover period */
/* or sid_upd after dtxhangover */
/* set log_en_adjust to correct value */
st->log_en_adjust = dtx_log_en_adjust[mode];
ptr = add(st->lsf_hist_ptr, M); move16();
test();
if (sub(ptr, 80) == 0)
{
ptr = 0; move16();
}
Copy( &st->lsf_hist[st->lsf_hist_ptr],&st->lsf_hist[ptr],M);
ptr = add(st->log_en_hist_ptr,1); move16();
test();
if (sub(ptr, DTX_HIST_SIZE) == 0)
{
ptr = 0; move16();
}
move16();
st->log_en_hist[ptr] = st->log_en_hist[st->log_en_hist_ptr]; /* Q11 */
/* compute mean log energy and lsp *
* from decoded signal (SID_FIRST) */
st->log_en = 0; move16();
for (i = 0; i < M; i++)
{
L_lsf[i] = 0; move16();
}
/* average energy and lsp */
for (i = 0; i < DTX_HIST_SIZE; i++)
{
st->log_en = add(st->log_en,
shr(st->log_en_hist[i],3));
for (j = 0; j < M; j++)
{
L_lsf[j] = L_add(L_lsf[j],
L_deposit_l(st->lsf_hist[i * M + j]));
}
}
for (j = 0; j < M; j++)
{
lsf[j] = extract_l(L_shr(L_lsf[j],3)); /* divide by 8 */ move16();
}
Lsf_lsp(lsf, st->lsp, M);
/* make log_en speech coder mode independent */
/* added again later before synthesis */
st->log_en = sub(st->log_en, st->log_en_adjust);
/* compute lsf variability vector */
Copy(st->lsf_hist, st->lsf_hist_mean, 80);
for (i = 0; i < M; i++)
{
L_lsf_mean = 0; move32();
/* compute mean lsf */
for (j = 0; j < 8; j++)
{
L_lsf_mean = L_add(L_lsf_mean,
L_deposit_l(st->lsf_hist_mean[i+j*M]));
}
lsf_mean = extract_l(L_shr(L_lsf_mean, 3)); move16();
/* subtract mean and limit to within reasonable limits *
* moreover the upper lsf's are attenuated */
for (j = 0; j < 8; j++)
{
/* subtract mean */
st->lsf_hist_mean[i+j*M] =
sub(st->lsf_hist_mean[i+j*M], lsf_mean);
/* attenuate deviation from mean, especially for upper lsf's */
st->lsf_hist_mean[i+j*M] =
mult(st->lsf_hist_mean[i+j*M], lsf_hist_mean_scale[i]);
/* limit the deviation */
test();
if (st->lsf_hist_mean[i+j*M] < 0)
{
negative = 1; move16();
}
else
{
negative = 0; move16();
}
st->lsf_hist_mean[i+j*M] = abs_s(st->lsf_hist_mean[i+j*M]);
/* apply soft limit */
test();
if (sub(st->lsf_hist_mean[i+j*M], 655) > 0)
{
st->lsf_hist_mean[i+j*M] =
add(655, shr(sub(st->lsf_hist_mean[i+j*M], 655), 2));
}
/* apply hard limit */
test();
if (sub(st->lsf_hist_mean[i+j*M], 1310) > 0)
{
st->lsf_hist_mean[i+j*M] = 1310; move16();
}
test();
if (negative != 0)
{
st->lsf_hist_mean[i+j*M] = -st->lsf_hist_mean[i+j*M];move16();
}
}
}
}
test();
if (st->sid_frame != 0 )
{
/* Set old SID parameters, always shift */
/* even if there is no new valid_data */
Copy(st->lsp, st->lsp_old, M);
st->old_log_en = st->log_en; move16();
test();
if (st->valid_data != 0 ) /* new data available (no CRC) */
{
/* Compute interpolation factor, since the division only works *
* for values of since_last_sid < 32 we have to limit the *
* interpolation to 32 frames */
tmp_int_length = st->since_last_sid; move16();
st->since_last_sid = 0; move16();
test();
if (sub(tmp_int_length, 32) > 0)
{
tmp_int_length = 32; move16();
}
test();
if (sub(tmp_int_length, 2) >= 0)
{
move16();
st->true_sid_period_inv = div_s(1 << 10, shl(tmp_int_length, 10));
}
else
{
st->true_sid_period_inv = 1 << 14; /* 0.5 it Q15 */ move16();
}
Init_D_plsf_3(lsfState, parm[0]); /* temporay initialization */
D_plsf_3(lsfState, MRDTX, 0, &parm[1], st->lsp);
Set_zero(lsfState->past_r_q, M); /* reset for next speech frame */
log_en_index = parm[4]; move16();
/* Q11 and divide by 4 */
st->log_en = shl(log_en_index, (11 - 2)); move16();
/* Subtract 2.5 in Q11 */
st->log_en = sub(st->log_en, (2560 * 2));
/* Index 0 is reserved for silence */
test();
if (log_en_index == 0)
{
st->log_en = MIN_16; move16();
}
/* no interpolation at startup after coder reset */
/* or when SID_UPD has been received right after SPEECH */
test(); test();
if ((st->data_updated == 0) ||
(sub(st->dtxGlobalState, SPEECH) == 0)
)
{
Copy(st->lsp, st->lsp_old, M);
st->old_log_en = st->log_en; move16();
}
} /* endif valid_data */
/* initialize gain predictor memory of other modes */
ma_pred_init = sub(shr(st->log_en,1), 9000); move16();
test();
if (ma_pred_init > 0)
{
ma_pred_init = 0; move16();
}
test();
if (sub(ma_pred_init, -14436) < 0)
{
ma_pred_init = -14436; move16();
}
predState->past_qua_en[0] = ma_pred_init; move16();
predState->past_qua_en[1] = ma_pred_init; move16();
predState->past_qua_en[2] = ma_pred_init; move16();
predState->past_qua_en[3] = ma_pred_init; move16();
/* past_qua_en for other modes than MR122 */
ma_pred_init = mult(5443, ma_pred_init);
/* scale down by factor 20*log10(2) in Q15 */
predState->past_qua_en_MR122[0] = ma_pred_init; move16();
predState->past_qua_en_MR122[1] = ma_pred_init; move16();
predState->past_qua_en_MR122[2] = ma_pred_init; move16();
predState->past_qua_en_MR122[3] = ma_pred_init; move16();
} /* endif sid_frame */
/* CN generation */
/* recompute level adjustment factor Q11 *
* st->log_en_adjust = 0.9*st->log_en_adjust + *
* 0.1*dtx_log_en_adjust[mode]); */
move16();
st->log_en_adjust = add(mult(st->log_en_adjust, 29491),
shr(mult(shl(dtx_log_en_adjust[mode],5),3277),5));
/* Interpolate SID info */
int_fac = shl(add(1,st->since_last_sid), 10); /* Q10 */ move16();
int_fac = mult(int_fac, st->true_sid_period_inv); /* Q10 * Q15 -> Q10 */
/* Maximize to 1.0 in Q10 */
test();
if (sub(int_fac, 1024) > 0)
{
int_fac = 1024; move16();
}
int_fac = shl(int_fac, 4); /* Q10 -> Q14 */
L_log_en_int = L_mult(int_fac, st->log_en); /* Q14 * Q11->Q26 */ move32();
for(i = 0; i < M; i++)
{
lsp_int[i] = mult(int_fac, st->lsp[i]);/* Q14 * Q15 -> Q14 */ move16();
}
int_fac = sub(16384, int_fac); /* 1-k in Q14 */ move16();
/* (Q14 * Q11 -> Q26) + Q26 -> Q26 */
L_log_en_int = L_mac(L_log_en_int, int_fac, st->old_log_en);
for(i = 0; i < M; i++)
{
/* Q14 + (Q14 * Q15 -> Q14) -> Q14 */
lsp_int[i] = add(lsp_int[i], mult(int_fac, st->lsp_old[i])); move16();
lsp_int[i] = shl(lsp_int[i], 1); /* Q14 -> Q15 */ move16();
}
/* compute the amount of lsf variability */
lsf_variab_factor = sub(st->log_pg_mean,2457); /* -0.6 in Q12 */ move16();
/* *0.3 Q12*Q15 -> Q12 */
lsf_variab_factor = sub(4096, mult(lsf_variab_factor, 9830));
/* limit to values between 0..1 in Q12 */
test();
if (sub(lsf_variab_factor, 4096) > 0)
{
lsf_variab_factor = 4096; move16();
}
test();
if (lsf_variab_factor < 0)
{
lsf_variab_factor = 0; move16();
}
lsf_variab_factor = shl(lsf_variab_factor, 3); /* -> Q15 */ move16();
/* get index of vector to do variability with */
lsf_variab_index = pseudonoise(&st->L_pn_seed_rx, 3); move16();
/* convert to lsf */
Lsp_lsf(lsp_int, lsf_int, M);
/* apply lsf variability */
Copy(lsf_int, lsf_int_variab, M);
for(i = 0; i < M; i++)
{
move16();
lsf_int_variab[i] = add(lsf_int_variab[i],
mult(lsf_variab_factor,
st->lsf_hist_mean[i+lsf_variab_index*M]));
}
/* make sure that LSP's are ordered */
Reorder_lsf(lsf_int, LSF_GAP, M);
Reorder_lsf(lsf_int_variab, LSF_GAP, M);
/* copy lsf to speech decoders lsf state */
Copy(lsf_int, lsfState->past_lsf_q, M);
/* convert to lsp */
Lsf_lsp(lsf_int, lsp_int, M);
Lsf_lsp(lsf_int_variab, lsp_int_variab, M);
/* Compute acoeffs Q12 acoeff is used for level *
* normalization and postfilter, acoeff_variab is *
* used for synthesis filter *
* by doing this we make sure that the level *
* in high frequenncies does not jump up and down */
Lsp_Az(lsp_int, acoeff);
Lsp_Az(lsp_int_variab, acoeff_variab);
/* For use in postfilter */
Copy(acoeff, &A_t[0], M + 1);
Copy(acoeff, &A_t[M + 1], M + 1);
Copy(acoeff, &A_t[2 * (M + 1)], M + 1);
Copy(acoeff, &A_t[3 * (M + 1)], M + 1);
/* Compute reflection coefficients Q15 */
A_Refl(&acoeff[1], refl);
/* Compute prediction error in Q15 */
pred_err = MAX_16; /* 0.99997 in Q15 */ move16();
for (i = 0; i < M; i++)
{
pred_err = mult(pred_err, sub(MAX_16, mult(refl[i], refl[i])));
}
/* compute logarithm of prediction gain */
Log2(L_deposit_l(pred_err), &log_pg_e, &log_pg_m);
/* convert exponent and mantissa to Word16 Q12 */
log_pg = shl(sub(log_pg_e,15), 12); /* Q12 */ move16();
log_pg = shr(sub(0,add(log_pg, shr(log_pg_m, 15-12))), 1); move16();
st->log_pg_mean = add(mult(29491,st->log_pg_mean),
mult(3277, log_pg)); move16();
/* Compute interpolated log energy */
L_log_en_int = L_shr(L_log_en_int, 10); /* Q26 -> Q16 */ move32();
/* Add 4 in Q16 */
L_log_en_int = L_add(L_log_en_int, 4 * 65536L); move32();
/* subtract prediction gain */
L_log_en_int = L_sub(L_log_en_int, L_shl(L_deposit_l(log_pg), 4));move32();
/* adjust level to speech coder mode */
L_log_en_int = L_add(L_log_en_int,
L_shl(L_deposit_l(st->log_en_adjust), 5)); move32();
log_en_int_e = extract_h(L_log_en_int); move16();
move16();
log_en_int_m = extract_l(L_shr(L_sub(L_log_en_int,
L_deposit_h(log_en_int_e)), 1));
level = extract_l(Pow2(log_en_int_e, log_en_int_m)); /* Q4 */ move16();
for (i = 0; i < 4; i++)
{
/* Compute innovation vector */
build_CN_code(&st->L_pn_seed_rx, ex);
for (j = 0; j < L_SUBFR; j++)
{
ex[j] = mult(level, ex[j]); move16();
}
/* Synthesize */
Syn_filt(acoeff_variab, ex, &synth[i * L_SUBFR], L_SUBFR,
mem_syn, 1);
} /* next i */
/* reset codebook averaging variables */
averState->hangVar = 20; move16();
averState->hangCount = 0; move16();
test();
if (sub(new_state, DTX_MUTE) == 0)
{
/* mute comfort noise as it has been quite a long time since
* last SID update was performed */
tmp_int_length = st->since_last_sid; move16();
test();
if (sub(tmp_int_length, 32) > 0)
{
tmp_int_length = 32; move16();
}
/* safety guard against division by zero */
test();
if(tmp_int_length <= 0) {
tmp_int_length = 8; move16();
}
move16();
st->true_sid_period_inv = div_s(1 << 10, shl(tmp_int_length, 10));
st->since_last_sid = 0; move16();
Copy(st->lsp, st->lsp_old, M);
st->old_log_en = st->log_en; move16();
/* subtract 1/8 in Q11 i.e -6/8 dB */
st->log_en = sub(st->log_en, 256); move16();
}
/* reset interpolation length timer
* if data has been updated. */
test(); test(); test(); test();
if ((st->sid_frame != 0) &&
((st->valid_data != 0) ||
((st->valid_data == 0) && (st->dtxHangoverAdded) != 0)))
{
st->since_last_sid = 0; move16();
st->data_updated = 1; move16();
}
return 0;
}
void D_plsf_3(
D_plsfState *st, /* i/o: State struct */
enum Mode mode, /* i : coder mode */
Word16 bfi, /* i : bad frame indicator (set to 1 if a */
/* bad frame is received) */
Word16 * indice, /* i : quantization indices of 3 submatrices, Q0 */
Word16 * lsp1_q /* o : quantized 1st LSP vector, Q15 */
)
{
Word16 i, index;
Word16 *p_cb1, *p_cb2, *p_cb3, *p_dico, temp;
Word16 lsf1_r[M];
Word16 lsf1_q[M];
if (bfi != 0) /* if bad frame */
{
/* use the past LSFs slightly shifted towards their mean */
for (i = 0; i < M; i++)
{
/* lsfi_q[i] = ALPHA*past_lsf_q[i] + ONE_ALPHA*mean_lsf[i]; */
lsf1_q[i] = add(mult(st->past_lsf_q[i], ALPHA),
mult(mean_lsf[i], ONE_ALPHA));
}
/* estimate past quantized residual to be used in next frame */
if (mode != MRDTX) {
for (i = 0; i < M; i++) {
/* temp = mean_lsf[i] + past_r2_q[i] * PRED_FAC; */
temp = add(mean_lsf[i], mult(st->past_r_q[i], pred_fac[i]));
st->past_r_q[i] = sub(lsf1_q[i], temp);
}
} else {
for (i = 0; i < M; i++) {
/* temp = mean_lsf[i] + past_r2_q[i]; */
temp = add(mean_lsf[i], st->past_r_q[i]);
st->past_r_q[i] = sub(lsf1_q[i], temp);
}
}
}
else /* if good LSFs received */
{
if (mode == MR475 || mode == MR515)
{ /* MR475, MR515 */
p_cb1 = dico1_lsf;
p_cb2 = dico2_lsf;
p_cb3 = mr515_3_lsf;
}
else if (mode == MR795)
{ /* MR795 */
p_cb1 = mr795_1_lsf;
p_cb2 = dico2_lsf;
p_cb3 = dico3_lsf;
}
else
{ /* MR59, MR67, MR74, MR102, MRDTX */
p_cb1 = dico1_lsf;
p_cb2 = dico2_lsf;
p_cb3 = dico3_lsf;
}
/* decode prediction residuals from 3 received indices */
index = *indice++;
p_dico = &p_cb1[/*add(index, add(index, index))*/ 3 * index];
lsf1_r[0] = *p_dico++;
lsf1_r[1] = *p_dico++;
lsf1_r[2] = *p_dico++;
index = *indice++;
if (mode == MR475 || mode == MR515)
{ /* MR475, MR515 only using every second entry */
/*index = shl(index,1);*/
index <<= 1;
}
p_dico = &p_cb2[add(index, add(index, index))];
lsf1_r[3] = *p_dico++;
lsf1_r[4] = *p_dico++;
lsf1_r[5] = *p_dico++;
index = *indice++;
p_dico = &p_cb3[shl(index, 2)];
lsf1_r[6] = *p_dico++;
lsf1_r[7] = *p_dico++;
lsf1_r[8] = *p_dico++;
lsf1_r[9] = *p_dico++;
/* Compute quantized LSFs and update the past quantized residual */
if (mode != MRDTX)
for (i = 0; i < M; i++) {
temp = add(mean_lsf[i], mult(st->past_r_q[i], pred_fac[i]));
lsf1_q[i] = add(lsf1_r[i], temp);
st->past_r_q[i] = lsf1_r[i];
}
else
for (i = 0; i < M; i++) {
temp = add(mean_lsf[i], st->past_r_q[i]);
lsf1_q[i] = add(lsf1_r[i], temp);
st->past_r_q[i] = lsf1_r[i];
}
}
/* verification that LSFs has minimum distance of LSF_GAP Hz */
Reorder_lsf(lsf1_q, LSF_GAP, M);
Copy (lsf1_q, st->past_lsf_q, M);
/* convert LSFs to the cosine domain */
Lsf_lsp(lsf1_q, lsp1_q, M);
}
/*
**************************************************************************
*
* Function : D_plsf_5
* Purpose : Decodes the 2 sets of LSP parameters in a frame
* using the received quantization indices.
*
**************************************************************************
*/
int D_plsf_5 (
D_plsfState *st, /* i/o: State variables */
Word16 bfi, /* i : bad frame indicator (set to 1 if a bad
frame is received) */
Word16 *indice, /* i : quantization indices of 5 submatrices, Q0 */
Word16 *lsp1_q, /* o : quantized 1st LSP vector (M), Q15 */
Word16 *lsp2_q /* o : quantized 2nd LSP vector (M), Q15 */
)
{
Word16 i;
const Word16 *p_dico;
Word16 temp, sign;
Word16 lsf1_r[M], lsf2_r[M];
Word16 lsf1_q[M], lsf2_q[M];
test ();
if (bfi != 0) /* if bad frame */
{
/* use the past LSFs slightly shifted towards their mean */
for (i = 0; i < M; i++)
{
/* lsfi_q[i] = ALPHA*st->past_lsf_q[i] + ONE_ALPHA*mean_lsf[i]; */
lsf1_q[i] = add (mult (st->past_lsf_q[i], ALPHA),
mult (mean_lsf[i], ONE_ALPHA));
move16 ();
lsf2_q[i] = lsf1_q[i]; move16 ();
}
/* estimate past quantized residual to be used in next frame */
for (i = 0; i < M; i++)
{
/* temp = mean_lsf[i] + st->past_r_q[i] * LSP_PRED_FAC_MR122; */
temp = add (mean_lsf[i], mult (st->past_r_q[i],
LSP_PRED_FAC_MR122));
st->past_r_q[i] = sub (lsf2_q[i], temp);
move16 ();
}
}
else
/* if good LSFs received */
{
/* decode prediction residuals from 5 received indices */
p_dico = &dico1_lsf[shl (indice[0], 2)];move16 ();
lsf1_r[0] = *p_dico++; move16 ();
lsf1_r[1] = *p_dico++; move16 ();
lsf2_r[0] = *p_dico++; move16 ();
lsf2_r[1] = *p_dico++; move16 ();
p_dico = &dico2_lsf[shl (indice[1], 2)];move16 ();
lsf1_r[2] = *p_dico++; move16 ();
lsf1_r[3] = *p_dico++; move16 ();
lsf2_r[2] = *p_dico++; move16 ();
lsf2_r[3] = *p_dico++; move16 ();
sign = indice[2] & 1; logic16 ();
i = shr (indice[2], 1);
p_dico = &dico3_lsf[shl (i, 2)]; move16 ();
test ();
if (sign == 0)
{
lsf1_r[4] = *p_dico++; move16 ();
lsf1_r[5] = *p_dico++; move16 ();
lsf2_r[4] = *p_dico++; move16 ();
lsf2_r[5] = *p_dico++; move16 ();
}
else
{
lsf1_r[4] = negate (*p_dico++); move16 ();
lsf1_r[5] = negate (*p_dico++); move16 ();
lsf2_r[4] = negate (*p_dico++); move16 ();
lsf2_r[5] = negate (*p_dico++); move16 ();
}
p_dico = &dico4_lsf[shl (indice[3], 2)];move16 ();
lsf1_r[6] = *p_dico++; move16 ();
lsf1_r[7] = *p_dico++; move16 ();
lsf2_r[6] = *p_dico++; move16 ();
lsf2_r[7] = *p_dico++; move16 ();
p_dico = &dico5_lsf[shl (indice[4], 2)];move16 ();
lsf1_r[8] = *p_dico++; move16 ();
lsf1_r[9] = *p_dico++; move16 ();
lsf2_r[8] = *p_dico++; move16 ();
lsf2_r[9] = *p_dico++; move16 ();
/* Compute quantized LSFs and update the past quantized residual */
for (i = 0; i < M; i++)
{
temp = add (mean_lsf[i], mult (st->past_r_q[i],
LSP_PRED_FAC_MR122));
lsf1_q[i] = add (lsf1_r[i], temp);
move16 ();
lsf2_q[i] = add (lsf2_r[i], temp);
move16 ();
st->past_r_q[i] = lsf2_r[i]; move16 ();
}
}
/* verification that LSFs have minimum distance of LSF_GAP Hz */
Reorder_lsf (lsf1_q, LSF_GAP, M);
Reorder_lsf (lsf2_q, LSF_GAP, M);
Copy (lsf2_q, st->past_lsf_q, M);
/* convert LSFs to the cosine domain */
Lsf_lsp (lsf1_q, lsp1_q, M);
Lsf_lsp (lsf2_q, lsp2_q, M);
return 0;
}
