int8_t acfilter_order;
int8_t acfilter_scaling;
int acfilter_coeffs[16];
+ int acfilter_prevvalues[16];
int8_t mclms_order;
int8_t mclms_scaling;
}
}
+static void revert_inter_ch_decorr(WmallDecodeCtx *s, int tile_size)
+{
+ int icoef;
+ if (s->num_channels != 2)
+ return;
+ else {
+ for (icoef = 0; icoef < tile_size; icoef++) {
+ s->channel_residues[0][icoef] -= s->channel_residues[1][icoef] >> 1;
+ s->channel_residues[1][icoef] += s->channel_residues[0][icoef];
+ }
+ }
+}
+static void revert_acfilter(WmallDecodeCtx *s, int tile_size)
+{
+ int ich, icoef;
+ int pred = 0, itap;
+ int **ch_coeffs = s->channel_residues;
+ int *filter_coeffs = s->acfilter_coeffs;
+ int *prevvalues = s->acfilter_prevvalues;
+ int scaling = s->acfilter_scaling;
+ int order = s->acfilter_order;
+
+ for (ich = 0; ich < s->num_channels; ich++) {
+ for (icoef = 0; icoef < tile_size; icoef++) {
+ for (itap = 0; itap < order; itap++)
+ pred += filter_coeffs[itap] * prevvalues[itap];
+ pred >>= scaling;
+ ch_coeffs[ich][icoef] += pred;
+ for (itap = 1; itap < order; itap++)
+ prevvalues[itap] = prevvalues[itap - 1];
+ prevvalues[0] = ch_coeffs[ich][icoef];
+ }
+ }
+}
/**
*@brief Decode a single subframe (block).