void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, float* L, float* R) { int downsampled = ac->m4ac.ext_sample_rate < sbr->sample_rate; int ch; int nch = (id_aac == TYPE_CPE) ? 2 : 1; if (sbr->start) { sbr_dequant(sbr, id_aac); } for (ch = 0; ch < nch; ch++) { /* decode channel */ sbr_qmf_analysis(&ac->dsp, &sbr->mdct_ana, 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); if (sbr->start) { sbr_hf_inverse_filter(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 sbr_mapping(ac, sbr, &sbr->data[ch], sbr->data[ch].e_a); 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->X_high, sbr, &sbr->data[ch], sbr->data[ch].e_a); } /* synthesis */ sbr_x_gen(sbr, sbr->X[ch], sbr->X_low, sbr->data[ch].Y, ch); } if (ac->m4ac.ps == 1) { if (sbr->ps.start) { ff_ps_apply(ac->avctx, &sbr->ps, sbr->X[0], sbr->X[1], sbr->kx[1] + sbr->m[1]); } else { memcpy(sbr->X[1], sbr->X[0], sizeof(sbr->X[0])); } nch = 2; } sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, L, sbr->X[0], sbr->qmf_filter_scratch, sbr->data[0].synthesis_filterbank_samples, &sbr->data[0].synthesis_filterbank_samples_offset, downsampled); if (nch == 2) sbr_qmf_synthesis(&ac->dsp, &sbr->mdct, R, sbr->X[1], sbr->qmf_filter_scratch, sbr->data[1].synthesis_filterbank_samples, &sbr->data[1].synthesis_filterbank_samples_offset, downsampled); }
void ff_sbr_apply(AACContext *ac, SpectralBandReplication *sbr, int id_aac, float* L, float* R) { int downsampled = ac->m4ac.ext_sample_rate < sbr->sample_rate; int ch; int nch = (id_aac == TYPE_CPE) ? 2 : 1; if (sbr->start) { sbr_dequant(sbr, id_aac); } for (ch = 0; ch < nch; ch++) {   sbr_qmf_analysis(&ac->dsp, &sbr->mdct_ana, 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); if (sbr->start) { sbr_hf_inverse_filter(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);  