static void sbr_process_channel(sbr_info *sbr, real_t *channel_buf, qmf_t X[MAX_NTSR][64],
uint8_t ch, uint8_t dont_process,
const uint8_t downSampledSBR)
{
int16_t k, l;
(void)downSampledSBR;
#ifdef DRM
if (sbr->Is_DRM_SBR)
{
sbr->bsco = max((int32_t)sbr->maxAACLine*32/(int32_t)sbr->frame_len - (int32_t)sbr->kx, 0);
} else {
#endif
sbr->bsco = 0;
#ifdef DRM
}
#endif
//#define PRE_QMF_PRINT
#ifdef PRE_QMF_PRINT
{
int i;
for (i = 0; i < 1024; i++)
{
printf("%d\n", channel_buf[i]);
}
}
#endif
/* subband analysis */
if (dont_process)
sbr_qmf_analysis_32(sbr, &sbr->qmfa[ch], channel_buf, sbr->Xsbr[ch], sbr->tHFGen, 32);
else
sbr_qmf_analysis_32(sbr, &sbr->qmfa[ch], channel_buf, sbr->Xsbr[ch], sbr->tHFGen, sbr->kx);
if (!dont_process)
{
#if 1
/* insert high frequencies here */
/* hf generation using patching */
hf_generation(sbr, sbr->Xsbr[ch], sbr->Xsbr[ch]
#ifdef SBR_LOW_POWER
,deg
#endif
,ch);
#endif
#ifdef SBR_LOW_POWER
for (l = sbr->t_E[ch][0]; l < sbr->t_E[ch][sbr->L_E[ch]]; l++)
{
for (k = 0; k < sbr->kx; k++)
{
QMF_RE(sbr->Xsbr[ch][sbr->tHFAdj + l][k]) = 0;
}
}
#endif
#if 1
/* hf adjustment */
hf_adjustment(sbr, sbr->Xsbr[ch]
#ifdef SBR_LOW_POWER
,deg
#endif
,ch);
#endif
}
if ((sbr->just_seeked != 0) || dont_process)
{
for (l = 0; l < sbr->numTimeSlotsRate; l++)
{
for (k = 0; k < 32; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
#endif
}
for (k = 32; k < 64; k++)
{
QMF_RE(X[l][k]) = 0;
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = 0;
#endif
}
}
} else {
for (l = 0; l < sbr->numTimeSlotsRate; l++)
{
uint8_t kx_band, M_band, bsco_band;
if (l < sbr->t_E[ch][0])
{
kx_band = sbr->kx_prev;
M_band = sbr->M_prev;
bsco_band = sbr->bsco_prev;
} else {
kx_band = sbr->kx;
M_band = sbr->M;
bsco_band = sbr->bsco;
}
#ifndef SBR_LOW_POWER
for (k = 0; k < kx_band + bsco_band; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
}
for (k = kx_band + bsco_band; k < kx_band + M_band; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
}
for (k = max(kx_band + bsco_band, kx_band + M_band); k < 64; k++)
{
QMF_RE(X[l][k]) = 0;
QMF_IM(X[l][k]) = 0;
}
#else
for (k = 0; k < kx_band + bsco_band; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
}
for (k = kx_band + bsco_band; k < min(kx_band + M_band, 63); k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
}
for (k = max(kx_band + bsco_band, kx_band + M_band); k < 64; k++)
{
QMF_RE(X[l][k]) = 0;
}
QMF_RE(X[l][kx_band - 1 + bsco_band]) +=
QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][kx_band - 1 + bsco_band]);
#endif
}
}
}
uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
const uint8_t just_seeked, const uint8_t downSampledSBR)
{
uint8_t l, k;
uint8_t dont_process = 0;
uint8_t ret = 0;
memset(p_XLR->X_L, 0, sizeof(*p_XLR->X_L));
memset(p_XLR->X_R, 0, sizeof(*p_XLR->X_R));
if (sbr == NULL)
return 20;
/* case can occur due to bit errors */
if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
return 21;
if (sbr->ret || (sbr->header_count == 0))
{
/* don't process just upsample */
dont_process = 1;
/* Re-activate reset for next frame */
if (sbr->ret && sbr->Reset)
sbr->bs_start_freq_prev = -1;
}
if (just_seeked)
{
sbr->just_seeked = 1;
} else {
sbr->just_seeked = 0;
}
sbr_process_channel(sbr, left_channel, p_XLR->X_L, 0, dont_process, downSampledSBR);
/* copy some extra data for PS */
for (l = 32; l < 38; l++)
{
for (k = 0; k < 5; k++)
{
QMF_RE(p_XLR->X_L[l][k]) = QMF_RE(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
QMF_IM(p_XLR->X_L[l][k]) = QMF_IM(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
}
}
/* perform parametric stereo */
#ifdef DRM_PS
if (sbr->Is_DRM_SBR)
{
drm_ps_decode(sbr->drm_ps, (sbr->ret > 0), sbr->sample_rate, p_XLR->X_L, p_XLR->X_R);
} else {
#endif
#ifdef PS_DEC
ps_decode(&sbr->ps, p_XLR->X_L, p_XLR->X_R);
#endif
#ifdef DRM_PS
}
#endif
/* subband synthesis */
if (downSampledSBR)
{
sbr_qmf_synthesis_32(sbr, &sbr->qmfs[0], p_XLR->X_L, left_channel);
sbr_qmf_synthesis_32(sbr, &sbr->qmfs[1], p_XLR->X_R, right_channel);
} else {
sbr_qmf_synthesis_64(sbr, &sbr->qmfs[0], p_XLR->X_L, left_channel);
sbr_qmf_synthesis_64(sbr, &sbr->qmfs[1], p_XLR->X_R, right_channel);
}
if (sbr->bs_header_flag)
sbr->just_seeked = 0;
if (sbr->header_count != 0 && sbr->ret == 0)
{
ret = sbr_save_prev_data(sbr, 0);
if (ret) return ret;
}
sbr_save_matrix(sbr, 0);
sbr->frame++;
return 0;
}
uint8_t sbrDecodeSingleFramePS(sbr_info *sbr, real_t *left_channel, real_t *right_channel,
const uint8_t just_seeked, const uint8_t downSampledSBR)
{
uint8_t l, k;
uint8_t dont_process = 0;
uint8_t ret = 0;
ALIGN qmf_t X_left[38][64] = {{0}};
ALIGN qmf_t X_right[38][64] = {{0}}; /* must set this to 0 */
if (sbr == NULL)
return 20;
/* case can occur due to bit errors */
if (sbr->id_aac != ID_SCE && sbr->id_aac != ID_LFE)
return 21;
if (sbr->ret || (sbr->header_count == 0))
{
/* don't process just upsample */
dont_process = 1;
/* Re-activate reset for next frame */
if (sbr->ret && sbr->Reset)
sbr->bs_start_freq_prev = -1;
}
if (just_seeked)
{
sbr->just_seeked = 1;
} else {
sbr->just_seeked = 0;
}
if (sbr->qmfs[1] == NULL)
{
sbr->qmfs[1] = qmfs_init((downSampledSBR)?32:64);
}
sbr->ret += sbr_process_channel(sbr, left_channel, X_left, 0, dont_process, downSampledSBR);
/* copy some extra data for PS */
for (l = sbr->numTimeSlotsRate; l < sbr->numTimeSlotsRate + 6; l++)
{
for (k = 0; k < 5; k++)
{
QMF_RE(X_left[l][k]) = QMF_RE(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
QMF_IM(X_left[l][k]) = QMF_IM(sbr->Xsbr[0][sbr->tHFAdj+l][k]);
}
}
/* perform parametric stereo */
#ifdef DRM_PS
if (sbr->Is_DRM_SBR)
{
drm_ps_decode(sbr->drm_ps, (sbr->ret > 0), X_left, X_right);
} else {
#endif
#ifdef PS_DEC
ps_decode(sbr->ps, X_left, X_right);
#endif
#ifdef DRM_PS
}
#endif
/* subband synthesis */
if (downSampledSBR)
{
sbr_qmf_synthesis_32(sbr, sbr->qmfs[0], X_left, left_channel);
sbr_qmf_synthesis_32(sbr, sbr->qmfs[1], X_right, right_channel);
} else {
sbr_qmf_synthesis_64(sbr, sbr->qmfs[0], X_left, left_channel);
sbr_qmf_synthesis_64(sbr, sbr->qmfs[1], X_right, right_channel);
}
if (sbr->bs_header_flag)
sbr->just_seeked = 0;
if (sbr->header_count != 0 && sbr->ret == 0)
{
ret = sbr_save_prev_data(sbr, 0);
if (ret) return ret;
}
sbr_save_matrix(sbr, 0);
sbr->frame++;
return 0;
}
void sbrDecodeFrame(sbr_info *sbr, real_t *left_channel,
real_t *right_channel, uint8_t id_aac,
uint8_t just_seeked)
{
int16_t i, k, l;
uint8_t dont_process = 0;
uint8_t ch, channels, ret;
real_t *ch_buf;
sbr->id_aac = id_aac;
channels = (id_aac == ID_SCE) ? 1 : 2;
ret = sbr_extension_data(&sbr->ld, sbr, id_aac);
ret = (sbr->ld.error)? sbr->ld.error : ret;
if(ret || (sbr->header_count == 0))
dont_process = 1;
if(just_seeked)
sbr->just_seeked = 1;
else
sbr->just_seeked = 0;
for (ch = 0; ch < channels; ch++){
if (ch == 0)
ch_buf = left_channel;
else
ch_buf = right_channel;
for (i = 0; i < tHFAdj; i++){
int8_t j;
for (j = sbr->kx_prev; j < sbr->kx; j++){
QMF_RE(sbr->Xcodec[ch][i*32 + j]) = 0;
QMF_IM(sbr->Xcodec[ch][i*32 + j]) = 0;
}
}
sbr_qmf_analysis_32(sbr->qmfa[ch], ch_buf, sbr->Xcodec[ch], tHFGen);
if(!dont_process){
hf_generation(sbr, sbr->Xcodec[ch], sbr->Xsbr[ch],ch);
hf_adjustment(sbr, sbr->Xsbr[ch],ch);
}
if((sbr->just_seeked != 0) || dont_process){
for (l = 0; l < 32; l++){
for (k = 0; k < 32; k++){
QMF_RE(sbr->temp_X[l * 64 + k]) = QMF_RE(sbr->Xcodec[ch][(l + tHFAdj)*32 + k]);
QMF_IM(sbr->temp_X[l * 64 + k]) = QMF_IM(sbr->Xcodec[ch][(l + tHFAdj)*32 + k]);
}
for (k = 32; k < 64; k++){
QMF_RE(sbr->temp_X[l * 64 + k]) = 0;
QMF_IM(sbr->temp_X[l * 64 + k]) = 0;
}
}
}else{
for (l = 0; l < 32; l++){
uint8_t xover_band;
if (l < sbr->t_E[ch][0])
xover_band = sbr->kx_prev;
else
xover_band = sbr->kx;
for (k = 0; k < xover_band; k++){
QMF_RE(sbr->temp_X[l * 64 + k]) = QMF_RE(sbr->Xcodec[ch][(l + tHFAdj)*32 + k]);
QMF_IM(sbr->temp_X[l * 64 + k]) = QMF_IM(sbr->Xcodec[ch][(l + tHFAdj)*32 + k]);
}
for (k = xover_band; k < 64; k++){
QMF_RE(sbr->temp_X[l * 64 + k]) = QMF_RE(sbr->Xsbr[ch][(l + tHFAdj)*64 + k]);
QMF_IM(sbr->temp_X[l * 64 + k]) = QMF_IM(sbr->Xsbr[ch][(l + tHFAdj)*64 + k]);
}
}
}
sbr_qmf_synthesis_64(sbr->qmfs[ch], (const complex_t*)sbr->temp_X, ch_buf);
for (i = 0; i < 32; i++){
int8_t j;
for (j = 0; j < tHFGen; j++){
QMF_RE(sbr->Xcodec[ch][j*32 + i]) = QMF_RE(sbr->Xcodec[ch][(j+32)*32 + i]);
QMF_IM(sbr->Xcodec[ch][j*32 + i]) = QMF_IM(sbr->Xcodec[ch][(j+32)*32 + i]);
}
}
for (i = 0; i < 64; i++){
int8_t j;
for (j = 0; j < tHFGen; j++){
QMF_RE(sbr->Xsbr[ch][j*64 + i]) = QMF_RE(sbr->Xsbr[ch][(j+32)*64 + i]);
QMF_IM(sbr->Xsbr[ch][j*64 + i]) = QMF_IM(sbr->Xsbr[ch][(j+32)*64 + i]);
}
}
}
if (sbr->bs_header_flag)
sbr->just_seeked = 0;
if (sbr->header_count != 0){
for (ch = 0; ch < channels; ch++)
sbr_save_prev_data(sbr, ch);
}
sbr->frame++;
}
static void hf_assembly(sbr_info *sbr, sbr_hfadj_info *adj,
qmf_t Xsbr[MAX_NTSRHFG][64], uint8_t ch)
{
static real_t h_smooth[] = {
COEF_CONST(0.03183050093751), COEF_CONST(0.11516383427084),
COEF_CONST(0.21816949906249), COEF_CONST(0.30150283239582),
COEF_CONST(0.33333333333333)
};
static int8_t phi_re[] = { 1, 0, -1, 0 };
static int8_t phi_im[] = { 0, 1, 0, -1 };
uint8_t m, l, i, n;
uint16_t fIndexNoise = 0;
uint8_t fIndexSine = 0;
uint8_t assembly_reset = 0;
real_t *temp;
real_t G_filt, Q_filt;
uint8_t h_SL;
if (sbr->Reset == 1)
{
assembly_reset = 1;
fIndexNoise = 0;
} else {
fIndexNoise = sbr->index_noise_prev[ch];
}
fIndexSine = sbr->psi_is_prev[ch];
for (l = 0; l < sbr->L_E[ch]; l++)
{
uint8_t no_noise = (l == sbr->l_A[ch] || l == sbr->prevEnvIsShort[ch]) ? 1 : 0;
#ifdef SBR_LOW_POWER
h_SL = 0;
#else
h_SL = (sbr->bs_smoothing_mode == 1) ? 0 : 4;
h_SL = (no_noise ? 0 : h_SL);
#endif
if (assembly_reset)
{
for (n = 0; n < 4; n++)
{
memcpy(sbr->G_temp_prev[ch][n], adj->G_lim_boost[l], sbr->M*sizeof(real_t));
memcpy(sbr->Q_temp_prev[ch][n], adj->Q_M_lim_boost[l], sbr->M*sizeof(real_t));
}
assembly_reset = 0;
}
for (i = sbr->t_E[ch][l]; i < sbr->t_E[ch][l+1]; i++)
{
#ifdef SBR_LOW_POWER
uint8_t i_min1, i_plus1;
uint8_t sinusoids = 0;
#endif
memcpy(sbr->G_temp_prev[ch][4], adj->G_lim_boost[l], sbr->M*sizeof(real_t));
memcpy(sbr->Q_temp_prev[ch][4], adj->Q_M_lim_boost[l], sbr->M*sizeof(real_t));
for (m = 0; m < sbr->M; m++)
{
uint8_t j;
qmf_t psi;
G_filt = 0;
Q_filt = 0;
j = 0;
if (h_SL != 0)
{
for (n = 0; n <= 4; n++)
{
G_filt += MUL_C(sbr->G_temp_prev[ch][n][m], h_smooth[j]);
Q_filt += MUL_C(sbr->Q_temp_prev[ch][n][m], h_smooth[j]);
j++;
}
} else {
G_filt = sbr->G_temp_prev[ch][4][m];
Q_filt = sbr->Q_temp_prev[ch][4][m];
}
Q_filt = (adj->S_M_boost[l][m] != 0 || no_noise) ? 0 : Q_filt;
/* add noise to the output */
fIndexNoise = (fIndexNoise + 1) & 511;
/* the smoothed gain values are applied to Xsbr */
/* V is defined, not calculated */
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) = MUL_R(G_filt, QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]))
+ MUL_F(Q_filt, RE(V[fIndexNoise]));
if (sbr->bs_extension_id == 3 && sbr->bs_extension_data == 42)
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) = 16428320;
#ifndef SBR_LOW_POWER
QMF_IM(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) = MUL_R(G_filt, QMF_IM(Xsbr[i + sbr->tHFAdj][m+sbr->kx]))
+ MUL_F(Q_filt, IM(V[fIndexNoise]));
#endif
//if (adj->S_index_mapped[m][l])
{
int8_t rev = (((m + sbr->kx) & 1) ? -1 : 1);
QMF_RE(psi) = MUL_R(adj->S_M_boost[l][m], phi_re[fIndexSine]);
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) += QMF_RE(psi);
#ifndef SBR_LOW_POWER
QMF_IM(psi) = rev * MUL_R(adj->S_M_boost[l][m], phi_im[fIndexSine]);
QMF_IM(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) += QMF_IM(psi);
#else
i_min1 = (fIndexSine - 1) & 3;
i_plus1 = (fIndexSine + 1) & 3;
if (m == 0)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx - 1]) -=
(-1*rev * MUL_C(MUL_R(adj->S_M_boost[l][0], phi_re[i_plus1]), COEF_CONST(0.00815)));
if(m < sbr->M - 1)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][1], phi_re[i_plus1]), COEF_CONST(0.00815)));
}
}
if ((m > 0) && (m < sbr->M - 1) && (sinusoids < 16))
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][m - 1], phi_re[i_min1]), COEF_CONST(0.00815)));
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][m + 1], phi_re[i_plus1]), COEF_CONST(0.00815)));
}
if ((m == sbr->M - 1) && (sinusoids < 16))
{
if (m > 0)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][m - 1], phi_re[i_min1]), COEF_CONST(0.00815)));
}
if (m + sbr->kx < 64)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx + 1]) -=
(-1*rev * MUL_C(MUL_R(adj->S_M_boost[l][m], phi_re[i_min1]), COEF_CONST(0.00815)));
}
}
if (adj->S_M_boost[l][m] != 0)
sinusoids++;
#endif
}
}
fIndexSine = (fIndexSine + 1) & 3;
temp = sbr->G_temp_prev[ch][0];
for (n = 0; n < 4; n++)
sbr->G_temp_prev[ch][n] = sbr->G_temp_prev[ch][n+1];
sbr->G_temp_prev[ch][4] = temp;
temp = sbr->Q_temp_prev[ch][0];
for (n = 0; n < 4; n++)
sbr->Q_temp_prev[ch][n] = sbr->Q_temp_prev[ch][n+1];
sbr->Q_temp_prev[ch][4] = temp;
}
}
sbr->index_noise_prev[ch] = fIndexNoise;
sbr->psi_is_prev[ch] = fIndexSine;
}
static void estimate_current_envelope(sbr_info *sbr, sbr_hfadj_info *adj,
qmf_t Xsbr[MAX_NTSRHFG][64], uint8_t ch)
{
uint8_t m, l, j, k, k_l, k_h, p;
real_t nrg, div;
if (sbr->bs_interpol_freq == 1)
{
for (l = 0; l < sbr->L_E[ch]; l++)
{
uint8_t i, l_i, u_i;
l_i = sbr->t_E[ch][l];
u_i = sbr->t_E[ch][l+1];
div = (real_t)(u_i - l_i);
for (m = 0; m < sbr->M; m++)
{
nrg = 0;
for (i = l_i + sbr->tHFAdj; i < u_i + sbr->tHFAdj; i++)
{
nrg += MUL_R(QMF_RE(Xsbr[i][m + sbr->kx]), QMF_RE(Xsbr[i][m + sbr->kx]))
#ifndef SBR_LOW_POWER
+ MUL_R(QMF_IM(Xsbr[i][m + sbr->kx]), QMF_IM(Xsbr[i][m + sbr->kx]))
#endif
;
}
sbr->E_curr[ch][m][l] = nrg / div;
#ifdef SBR_LOW_POWER
sbr->E_curr[ch][m][l] *= 2;
#endif
}
}
} else {
for (l = 0; l < sbr->L_E[ch]; l++)
{
for (p = 0; p < sbr->n[sbr->f[ch][l]]; p++)
{
k_l = sbr->f_table_res[sbr->f[ch][l]][p];
k_h = sbr->f_table_res[sbr->f[ch][l]][p+1];
for (k = k_l; k < k_h; k++)
{
uint8_t i, l_i, u_i;
nrg = 0.0;
l_i = sbr->t_E[ch][l];
u_i = sbr->t_E[ch][l+1];
div = (real_t)((u_i - l_i)*(k_h - k_l));
for (i = l_i + sbr->tHFAdj; i < u_i + sbr->tHFAdj; i++)
{
for (j = k_l; j < k_h; j++)
{
nrg += MUL_R(QMF_RE(Xsbr[i][j]), QMF_RE(Xsbr[i][j]))
#ifndef SBR_LOW_POWER
+ MUL_R(QMF_IM(Xsbr[i][j]), QMF_IM(Xsbr[i][j]))
#endif
;
}
}
sbr->E_curr[ch][k - sbr->kx][l] = nrg / div;
#ifdef SBR_LOW_POWER
sbr->E_curr[ch][k - sbr->kx][l] *= 2;
#endif
}
}
}
}
}
void hf_generation(sbr_info *sbr, qmf_t Xlow[MAX_NTSRHFG][32],
qmf_t Xhigh[MAX_NTSRHFG][64]
#ifdef SBR_LOW_POWER
,real_t *deg
#endif
,uint8_t ch)
{
uint8_t l, i, x;
ALIGN complex_t alpha_0[64], alpha_1[64];
#ifdef SBR_LOW_POWER
ALIGN real_t rxx[64];
#endif
uint8_t offset = sbr->tHFAdj;
uint8_t first = sbr->t_E[ch][0];
uint8_t last = sbr->t_E[ch][sbr->L_E[ch]];
// printf("%d %d\n", first, last);
calc_chirp_factors(sbr, ch);
for (i = first; i < last; i++)
{
memset(Xhigh[i + offset], 0, 64 * sizeof(qmf_t));
}
if ((ch == 0) && (sbr->Reset))
patch_construction(sbr);
/* calculate the prediction coefficients */
calc_prediction_coef(sbr, Xlow, alpha_0, alpha_1
#ifdef SBR_LOW_POWER
, rxx
#endif
);
#ifdef SBR_LOW_POWER
calc_aliasing_degree(sbr, rxx, deg);
#endif
/* actual HF generation */
for (i = 0; i < sbr->noPatches; i++)
{
for (x = 0; x < sbr->patchNoSubbands[i]; x++)
{
complex_t a0, a1;
real_t bw, bw2;
uint8_t q, p, k, g;
/* find the low and high band for patching */
k = sbr->kx + x;
for (q = 0; q < i; q++)
{
k += sbr->patchNoSubbands[q];
}
p = sbr->patchStartSubband[i] + x;
#ifdef SBR_LOW_POWER
if (x != 0 /*x < sbr->patchNoSubbands[i]-1*/)
deg[k] = deg[p];
else
deg[k] = 0;
#endif
g = sbr->table_map_k_to_g[k];
bw = sbr->bwArray[ch][g];
bw2 = MUL_C(bw, bw);
/* do the patching */
/* with or without filtering */
if (bw2 > 0)
{
RE(a0) = MUL_C(RE(alpha_0[p]), bw);
RE(a1) = MUL_C(RE(alpha_1[p]), bw2);
#ifndef SBR_LOW_POWER
IM(a0) = MUL_C(IM(alpha_0[p]), bw);
IM(a1) = MUL_C(IM(alpha_1[p]), bw2);
#endif
for (l = first; l < last; l++)
{
QMF_RE(Xhigh[l + offset][k]) = QMF_RE(Xlow[l + offset][p]);
#ifndef SBR_LOW_POWER
QMF_IM(Xhigh[l + offset][k]) = QMF_IM(Xlow[l + offset][p]);
#endif
#ifdef SBR_LOW_POWER
QMF_RE(Xhigh[l + offset][k]) += (
MUL_R(RE(a0), QMF_RE(Xlow[l - 1 + offset][p])) +
MUL_R(RE(a1), QMF_RE(Xlow[l - 2 + offset][p])));
#else
QMF_RE(Xhigh[l + offset][k]) += (
RE(a0) * QMF_RE(Xlow[l - 1 + offset][p]) -
IM(a0) * QMF_IM(Xlow[l - 1 + offset][p]) +
RE(a1) * QMF_RE(Xlow[l - 2 + offset][p]) -
IM(a1) * QMF_IM(Xlow[l - 2 + offset][p]));
QMF_IM(Xhigh[l + offset][k]) += (
IM(a0) * QMF_RE(Xlow[l - 1 + offset][p]) +
RE(a0) * QMF_IM(Xlow[l - 1 + offset][p]) +
IM(a1) * QMF_RE(Xlow[l - 2 + offset][p]) +
RE(a1) * QMF_IM(Xlow[l - 2 + offset][p]));
#endif
}
} else {
for (l = first; l < last; l++)
{
QMF_RE(Xhigh[l + offset][k]) = QMF_RE(Xlow[l + offset][p]);
#ifndef SBR_LOW_POWER
QMF_IM(Xhigh[l + offset][k]) = QMF_IM(Xlow[l + offset][p]);
#endif
}
}
}
}
if (sbr->Reset)
{
limiter_frequency_table(sbr);
}
}
static void auto_correlation(sbr_info *sbr, acorr_coef *ac, qmf_t buffer[MAX_NTSRHFG][32],
uint8_t bd, uint8_t len)
{
real_t r01r = 0, r01i = 0, r02r = 0, r02i = 0, r11r = 0;
const real_t rel = 1 / (1 + 1e-6f);
int8_t j;
uint8_t offset = sbr->tHFAdj;
for (j = offset; j < len + offset; j++)
{
r01r += QMF_RE(buffer[j][bd]) * QMF_RE(buffer[j-1][bd]) +
QMF_IM(buffer[j][bd]) * QMF_IM(buffer[j-1][bd]);
r01i += QMF_IM(buffer[j][bd]) * QMF_RE(buffer[j-1][bd]) -
QMF_RE(buffer[j][bd]) * QMF_IM(buffer[j-1][bd]);
r02r += QMF_RE(buffer[j][bd]) * QMF_RE(buffer[j-2][bd]) +
QMF_IM(buffer[j][bd]) * QMF_IM(buffer[j-2][bd]);
r02i += QMF_IM(buffer[j][bd]) * QMF_RE(buffer[j-2][bd]) -
QMF_RE(buffer[j][bd]) * QMF_IM(buffer[j-2][bd]);
r11r += QMF_RE(buffer[j-1][bd]) * QMF_RE(buffer[j-1][bd]) +
QMF_IM(buffer[j-1][bd]) * QMF_IM(buffer[j-1][bd]);
}
RE(ac->r01) = r01r;
IM(ac->r01) = r01i;
RE(ac->r02) = r02r;
IM(ac->r02) = r02i;
RE(ac->r11) = r11r;
RE(ac->r12) = r01r -
(QMF_RE(buffer[len+offset-1][bd]) * QMF_RE(buffer[len+offset-2][bd]) + QMF_IM(buffer[len+offset-1][bd]) * QMF_IM(buffer[len+offset-2][bd])) +
(QMF_RE(buffer[offset-1][bd]) * QMF_RE(buffer[offset-2][bd]) + QMF_IM(buffer[offset-1][bd]) * QMF_IM(buffer[offset-2][bd]));
IM(ac->r12) = r01i -
(QMF_IM(buffer[len+offset-1][bd]) * QMF_RE(buffer[len+offset-2][bd]) - QMF_RE(buffer[len+offset-1][bd]) * QMF_IM(buffer[len+offset-2][bd])) +
(QMF_IM(buffer[offset-1][bd]) * QMF_RE(buffer[offset-2][bd]) - QMF_RE(buffer[offset-1][bd]) * QMF_IM(buffer[offset-2][bd]));
RE(ac->r22) = r11r -
(QMF_RE(buffer[len+offset-2][bd]) * QMF_RE(buffer[len+offset-2][bd]) + QMF_IM(buffer[len+offset-2][bd]) * QMF_IM(buffer[len+offset-2][bd])) +
(QMF_RE(buffer[offset-2][bd]) * QMF_RE(buffer[offset-2][bd]) + QMF_IM(buffer[offset-2][bd]) * QMF_IM(buffer[offset-2][bd]));
ac->det = RE(ac->r11) * RE(ac->r22) - rel * (RE(ac->r12) * RE(ac->r12) + IM(ac->r12) * IM(ac->r12));
}
static void sbr_process_channel(sbr_info *sbr, real_t *channel_buf, qmf_t X[MAX_NTSR][64],
uint8_t ch, uint8_t dont_process)
{
int16_t i, k, l;
#ifdef SBR_LOW_POWER
ALIGN real_t deg[64];
#endif
if (sbr->frame == 0)
{
uint8_t j;
sbr->qmfa[ch] = qmfa_init(32);
sbr->qmfs[ch] = qmfs_init(64);
for (j = 0; j < 5; j++)
{
sbr->G_temp_prev[ch][j] = faad_malloc(64*sizeof(real_t));
sbr->Q_temp_prev[ch][j] = faad_malloc(64*sizeof(real_t));
}
memset(sbr->Xsbr[ch], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*64 * sizeof(qmf_t));
memset(sbr->Xcodec[ch], 0, (sbr->numTimeSlotsRate+sbr->tHFGen)*32 * sizeof(qmf_t));
}
/* subband analysis */
if (dont_process)
sbr_qmf_analysis_32(sbr, sbr->qmfa[ch], channel_buf, sbr->Xcodec[ch], sbr->tHFGen, 32);
else
sbr_qmf_analysis_32(sbr, sbr->qmfa[ch], channel_buf, sbr->Xcodec[ch], sbr->tHFGen, sbr->kx);
if (!dont_process)
{
#if 1
/* insert high frequencies here */
/* hf generation using patching */
hf_generation(sbr, sbr->Xcodec[ch], sbr->Xsbr[ch]
#ifdef SBR_LOW_POWER
,deg
#endif
,ch);
#endif
#ifdef SBR_LOW_POWER
for (l = sbr->t_E[ch][0]; l < sbr->t_E[ch][sbr->L_E[ch]]; l++)
{
for (k = 0; k < sbr->kx; k++)
{
QMF_RE(sbr->Xsbr[ch][sbr->tHFAdj + l][k]) = 0;
}
}
#endif
#if 1
/* hf adjustment */
hf_adjustment(sbr, sbr->Xsbr[ch]
#ifdef SBR_LOW_POWER
,deg
#endif
,ch);
#endif
}
if ((sbr->just_seeked != 0) || dont_process)
{
for (l = 0; l < sbr->numTimeSlotsRate; l++)
{
for (k = 0; k < 32; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xcodec[ch][l + sbr->tHFAdj][k]);
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = QMF_IM(sbr->Xcodec[ch][l + sbr->tHFAdj][k]);
#endif
}
for (k = 32; k < 64; k++)
{
QMF_RE(X[l][k]) = 0;
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = 0;
#endif
}
}
} else {
for (l = 0; l < sbr->numTimeSlotsRate; l++)
{
uint8_t xover_band;
if (l < sbr->t_E[ch][0])
xover_band = sbr->kx_prev;
else
xover_band = sbr->kx;
for (k = 0; k < xover_band; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xcodec[ch][l + sbr->tHFAdj][k]);
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = QMF_IM(sbr->Xcodec[ch][l + sbr->tHFAdj][k]);
#endif
}
for (k = xover_band; k < 64; k++)
{
QMF_RE(X[l][k]) = QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
#ifndef SBR_LOW_POWER
QMF_IM(X[l][k]) = QMF_IM(sbr->Xsbr[ch][l + sbr->tHFAdj][k]);
#endif
}
#ifdef SBR_LOW_POWER
QMF_RE(X[l][xover_band - 1]) += QMF_RE(sbr->Xsbr[ch][l + sbr->tHFAdj][xover_band - 1]);
#endif
}
}
for (i = 0; i < sbr->tHFGen; i++)
{
memmove(sbr->Xcodec[ch][i], sbr->Xcodec[ch][i+sbr->numTimeSlotsRate], 32 * sizeof(qmf_t));
memmove(sbr->Xsbr[ch][i], sbr->Xsbr[ch][i+sbr->numTimeSlotsRate], 64 * sizeof(qmf_t));
}
}