void ff_mpc_dequantize_and_synth(MPCContext * c, int maxband, void *data, int channels) { int i, j, ch; Band *bands = c->bands; int off; float mul; /* dequantize */ memset(c->sb_samples, 0, sizeof(c->sb_samples)); off = 0; for(i = 0; i <= maxband; i++, off += SAMPLES_PER_BAND){ for(ch = 0; ch < 2; ch++){ if(bands[i].res[ch]){ j = 0; mul = mpc_CC[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][0] & 0xFF]; for(; j < 12; j++) c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; mul = mpc_CC[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][1] & 0xFF]; for(; j < 24; j++) c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; mul = mpc_CC[bands[i].res[ch]] * mpc_SCF[bands[i].scf_idx[ch][2] & 0xFF]; for(; j < 36; j++) c->sb_samples[ch][j][i] = mul * c->Q[ch][j + off]; } } if(bands[i].msf){ int t1, t2; for(j = 0; j < SAMPLES_PER_BAND; j++){ t1 = c->sb_samples[0][j][i]; t2 = c->sb_samples[1][j][i]; c->sb_samples[0][j][i] = t1 + t2; c->sb_samples[1][j][i] = t1 - t2; } } } mpc_synth(c, data, channels); }