+ for (ch = 0; ch < nch; ch++) {
+ /* decode channel */
+ sbr_qmf_analysis(&ac->dsp, &sbr->mdct_ana, &sbr->dsp, ch ? R : L, sbr->data[ch].analysis_filterbank_samples,
+ (float*)sbr->qmf_filter_scratch,
+ sbr->data[ch].W);
+ sbr_lf_gen(ac, sbr, sbr->X_low, sbr->data[ch].W);
+ sbr->data[ch].Ypos ^= 1;
+ if (sbr->start) {
+ sbr_hf_inverse_filter(&sbr->dsp, sbr->alpha0, sbr->alpha1, sbr->X_low, sbr->k[0]);
+ sbr_chirp(sbr, &sbr->data[ch]);
+ sbr_hf_gen(ac, sbr, sbr->X_high, sbr->X_low, sbr->alpha0, sbr->alpha1,
+ sbr->data[ch].bw_array, sbr->data[ch].t_env,
+ sbr->data[ch].bs_num_env);
+
+ // hf_adj
+ err = sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
+ if (!err) {
+ sbr_env_estimate(sbr->e_curr, sbr->X_high, sbr, &sbr->data[ch]);
+ sbr_gain_calc(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a);
+ sbr_hf_assemble(sbr->data[ch].Y[sbr->data[ch].Ypos],
+ sbr->X_high, sbr, &sbr->data[ch],
+ sbr->data[ch].e_a);
+ }
+ }