void Lsp_get_quant(
Word16 lspcb1[][M], /* (i) Q13 : first stage LSP codebook */
Word16 lspcb2[][M], /* (i) Q13 : Second stage LSP codebook */
Word16 code0, /* (i) : selected code of first stage */
Word16 code1, /* (i) : selected code of second stage */
Word16 code2, /* (i) : selected code of second stage */
Word16 fg[][M], /* (i) Q15 : MA prediction coef. */
Word16 freq_prev[][M], /* (i) Q13 : previous LSP vector */
Word16 lspq[], /* (o) Q13 : quantized LSP parameters */
Word16 fg_sum[] /* (i) Q15 : present MA prediction coef. */
)
{
Word16 j;
Word16 buf[M]; /* Q13 */
for ( j = 0 ; j < NC ; j++ )
buf[j] = add( lspcb1[code0][j], lspcb2[code1][j] );
for ( j = NC ; j < M ; j++ )
buf[j] = add( lspcb1[code0][j], lspcb2[code2][j] );
Lsp_expand_1_2(buf, GAP1);
Lsp_expand_1_2(buf, GAP2);
Lsp_prev_compose(buf, lspq, fg, freq_prev, fg_sum);
Lsp_prev_update(buf, freq_prev);
Lsp_stability( lspq );
return;
}
void Relspwede(
Word16 lsp[], /* (i) Q13 : unquantized LSP parameters */
Word16 wegt[], /* (i) norm: weighting coefficients */
Word16 lspq[], /* (o) Q13 : quantized LSP parameters */
Word16 lspcb1[][M], /* (i) Q13 : first stage LSP codebook */
Word16 lspcb2[][M], /* (i) Q13 : Second stage LSP codebook */
Word16 fg[MODE][MA_NP][M], /* (i) Q15 : MA prediction coefficients */
Word16 freq_prev[MA_NP][M], /* (i) Q13 : previous LSP vector */
Word16 fg_sum[MODE][M], /* (i) Q15 : present MA prediction coef.*/
Word16 fg_sum_inv[MODE][M], /* (i) Q12 : inverse coef. */
Word16 code_ana[], /* (o) : codes of the selected LSP */
Word16 freq_cur[] /* (o) Q13 : current LSP MA vector */
)
{
Word16 mode, j;
Word16 index, mode_index;
Word16 cand[MODE], cand_cur;
Word16 tindex1[MODE], tindex2[MODE];
Word32 L_tdist[MODE]; /* Q26 */
Word16 rbuf[M]; /* Q13 */
Word16 buf[M]; /* Q13 */
for(mode = 0; mode<MODE; mode++) {
Lsp_prev_extract(lsp, rbuf, fg[mode], freq_prev, fg_sum_inv[mode]);
Lsp_pre_select(rbuf, lspcb1, &cand_cur );
cand[mode] = cand_cur;
Lsp_select_1(rbuf, lspcb1[cand_cur], wegt, lspcb2, &index);
tindex1[mode] = index;
for( j = 0 ; j < NC ; j++ )
buf[j] = add( lspcb1[cand_cur][j], lspcb2[index][j] );
Lsp_expand_1(buf, GAP1);
Lsp_select_2(rbuf, lspcb1[cand_cur], wegt, lspcb2, &index);
tindex2[mode] = index;
for( j = NC ; j < M ; j++ )
buf[j] = add( lspcb1[cand_cur][j], lspcb2[index][j] );
Lsp_expand_2(buf, GAP1);
Lsp_expand_1_2(buf, GAP2);
Lsp_get_tdist(wegt, buf, &L_tdist[mode], rbuf, fg_sum[mode]);
}
Lsp_last_select(L_tdist, &mode_index);
code_ana[0] = shl( mode_index,NC0_B ) | cand[mode_index];
code_ana[1] = shl( tindex1[mode_index],NC1_B ) | tindex2[mode_index];
Lsp_get_quante(lspcb1, lspcb2, cand[mode_index],
tindex1[mode_index], tindex2[mode_index],
fg[mode_index], freq_prev, lspq, fg_sum[mode_index], freq_cur) ;
return;
}
