FreeCalypso > hg > gsm-codec-lib
view libtwamr/s10_8pf.c @ 476:c84bf526c7eb default tip
beginning of libtwamr documentation
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sat, 18 May 2024 21:22:07 +0000 |
| parents | ebd064c52fe3 |
| children |
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/* ******************************************************************************** * * GSM AMR-NB speech codec R98 Version 7.6.0 December 12, 2001 * R99 Version 3.3.0 * REL-4 Version 4.1.0 * ******************************************************************************** * * File : s10_8pf.c * Purpose : Searches a 35/31 bit algebraic codebook containing * : 10/8 pulses in a frame of 40 samples. * ******************************************************************************** */ /* ******************************************************************************** * MODULE INCLUDE FILE AND VERSION ID ******************************************************************************** */ #include "namespace.h" #include "s10_8pf.h" /* ******************************************************************************** * INCLUDE FILES ******************************************************************************** */ #include "typedef.h" #include "basic_op.h" #include "no_count.h" #include "cnst.h" /* ******************************************************************************** * LOCAL VARIABLES AND TABLES ******************************************************************************** */ /************************************************************************* * * FUNCTION search_10and8i40() * * PURPOSE: Search the best codevector; determine positions of the 10/8 * pulses in the 40-sample frame. * * search_10and8i40 (10,5,5,dn, rr, ipos, pos_max, codvec); for GSMEFR * search_10and8i40 (8, 4,4,dn, rr, ipos, pos_max, codvec); for 10.2 * *************************************************************************/ #define _1_2 (Word16)(32768L/2) #define _1_4 (Word16)(32768L/4) #define _1_8 (Word16)(32768L/8) #define _1_16 (Word16)(32768L/16) #define _1_32 (Word16)(32768L/32) #define _1_64 (Word16)(32768L/64) #define _1_128 (Word16)(32768L/128) void search_10and8i40 ( Word16 nbPulse, /* i : nbpulses to find */ Word16 step, /* i : stepsize */ Word16 nbTracks, /* i : nbTracks */ Word16 dn[], /* i : correlation between target and h[] */ Word16 rr[][L_CODE], /* i : matrix of autocorrelation */ Word16 ipos[], /* i : starting position for each pulse */ Word16 pos_max[], /* i : position of maximum of dn[] */ Word16 codvec[] /* o : algebraic codebook vector */ ) { Word16 i0, i1, i2, i3, i4, i5, i6, i7, i8, i9; Word16 i, j, k, pos, ia, ib; Word16 psk, ps, ps0, ps1, ps2, sq, sq2; Word16 alpk, alp, alp_16; Word16 rrv[L_CODE]; Word32 s, alp0, alp1, alp2; Word16 gsmefrFlag; test(); if (sub(nbPulse, 10) == 0) { gsmefrFlag=1; move16 (); } else { gsmefrFlag=0; move16 (); } /* fix i0 on maximum of correlation position */ i0 = pos_max[ipos[0]]; move16 (); /*------------------------------------------------------------------* * i1 loop: * *------------------------------------------------------------------*/ /* Default value */ psk = -1; move16 (); alpk = 1; move16 (); for (i = 0; i < nbPulse; i++) { codvec[i] = i; move16 (); } for (i = 1; i < nbTracks; i++) { i1 = pos_max[ipos[1]]; move16 (); ps0 = add (dn[i0], dn[i1]); alp0 = L_mult (rr[i0][i0], _1_16); alp0 = L_mac (alp0, rr[i1][i1], _1_16); alp0 = L_mac (alp0, rr[i0][i1], _1_8); /*----------------------------------------------------------------* * i2 and i3 loop: * *----------------------------------------------------------------*/ /* initialize 4 indices for next loop. */ move16 (); /* initialize "rr[i3][i3]" pointer */ move16 (); /* initialize "rr[i0][i3]" pointer */ move16 (); /* initialize "rr[i1][i3]" pointer */ move16 (); /* initialize "rrv[i3]" pointer */ for (i3 = ipos[3]; i3 < L_CODE; i3 += step) { s = L_mult (rr[i3][i3], _1_8); /* index incr= step+L_CODE */ s = L_mac (s, rr[i0][i3], _1_4); /* index increment = step */ s = L_mac (s, rr[i1][i3], _1_4); /* index increment = step */ rrv[i3] = round (s); move16 (); } /* Default value */ sq = -1; move16 (); alp = 1; move16 (); ps = 0; move16 (); ia = ipos[2]; move16 (); ib = ipos[3]; move16 (); /* initialize 4 indices for i2 loop. */ move16 (); /* initialize "dn[i2]" pointer */ move16 (); /* initialize "rr[i2][i2]" pointer */ move16 (); /* initialize "rr[i0][i2]" pointer */ move16 (); /* initialize "rr[i1][i2]" pointer */ for (i2 = ipos[2]; i2 < L_CODE; i2 += step) { /* index increment = step */ ps1 = add (ps0, dn[i2]); /* index incr= step+L_CODE */ alp1 = L_mac (alp0, rr[i2][i2], _1_16); /* index increment = step */ alp1 = L_mac (alp1, rr[i0][i2], _1_8); /* index increment = step */ alp1 = L_mac (alp1, rr[i1][i2], _1_8); /* initialize 3 indices for i3 inner loop */ move16 (); /* initialize "dn[i3]" pointer */ move16 (); /* initialize "rrv[i3]" pointer */ move16 (); /* initialize "rr[i2][i3]" pointer */ for (i3 = ipos[3]; i3 < L_CODE; i3 += step) { /* index increment = step */ ps2 = add (ps1, dn[i3]); /* index increment = step */ alp2 = L_mac (alp1, rrv[i3], _1_2); /* index increment = step */ alp2 = L_mac (alp2, rr[i2][i3], _1_8); sq2 = mult (ps2, ps2); alp_16 = round (alp2); s = L_msu (L_mult (alp, sq2), sq, alp_16); test (); if (s > 0) { sq = sq2; move16 (); ps = ps2; move16 (); alp = alp_16; move16 (); ia = i2; move16 (); ib = i3; move16 (); } } } i2 = ia; move16 (); i3 = ib; move16 (); /*----------------------------------------------------------------* * i4 and i5 loop: * *----------------------------------------------------------------*/ ps0 = ps; move16 (); alp0 = L_mult (alp, _1_2); /* initialize 6 indices for next loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); for (i5 = ipos[5]; i5 < L_CODE; i5 += step) { s = L_mult (rr[i5][i5], _1_8); s = L_mac (s, rr[i0][i5], _1_4); s = L_mac (s, rr[i1][i5], _1_4); s = L_mac (s, rr[i2][i5], _1_4); s = L_mac (s, rr[i3][i5], _1_4); rrv[i5] = round (s); move16 (); } /* Default value */ sq = -1; move16 (); alp = 1; move16 (); ps = 0; move16 (); ia = ipos[4]; move16 (); ib = ipos[5]; move16 (); /* initialize 6 indices for i4 loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); for (i4 = ipos[4]; i4 < L_CODE; i4 += step) { ps1 = add (ps0, dn[i4]); alp1 = L_mac (alp0, rr[i4][i4], _1_32); alp1 = L_mac (alp1, rr[i0][i4], _1_16); alp1 = L_mac (alp1, rr[i1][i4], _1_16); alp1 = L_mac (alp1, rr[i2][i4], _1_16); alp1 = L_mac (alp1, rr[i3][i4], _1_16); /* initialize 3 indices for i5 inner loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); for (i5 = ipos[5]; i5 < L_CODE; i5 += step) { ps2 = add (ps1, dn[i5]); alp2 = L_mac (alp1, rrv[i5], _1_4); alp2 = L_mac (alp2, rr[i4][i5], _1_16); sq2 = mult (ps2, ps2); alp_16 = round (alp2); s = L_msu (L_mult (alp, sq2), sq, alp_16); test (); if (s > 0) { sq = sq2; move16 (); ps = ps2; move16 (); alp = alp_16; move16 (); ia = i4; move16 (); ib = i5; move16 (); } } } i4 = ia; move16 (); i5 = ib; move16 (); /*----------------------------------------------------------------* * i6 and i7 loop: * *----------------------------------------------------------------*/ ps0 = ps; move16 (); alp0 = L_mult (alp, _1_2); /* initialize 8 indices for next loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); for (i7 = ipos[7]; i7 < L_CODE; i7 += step) { s = L_mult (rr[i7][i7], _1_16); s = L_mac (s, rr[i0][i7], _1_8); s = L_mac (s, rr[i1][i7], _1_8); s = L_mac (s, rr[i2][i7], _1_8); s = L_mac (s, rr[i3][i7], _1_8); s = L_mac (s, rr[i4][i7], _1_8); s = L_mac (s, rr[i5][i7], _1_8); rrv[i7] = round (s); move16 (); } /* Default value */ sq = -1; move16 (); alp = 1; move16 (); ps = 0; move16 (); ia = ipos[6]; move16 (); ib = ipos[7]; move16 (); /* initialize 8 indices for i6 loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); for (i6 = ipos[6]; i6 < L_CODE; i6 += step) { ps1 = add (ps0, dn[i6]); alp1 = L_mac (alp0, rr[i6][i6], _1_64); alp1 = L_mac (alp1, rr[i0][i6], _1_32); alp1 = L_mac (alp1, rr[i1][i6], _1_32); alp1 = L_mac (alp1, rr[i2][i6], _1_32); alp1 = L_mac (alp1, rr[i3][i6], _1_32); alp1 = L_mac (alp1, rr[i4][i6], _1_32); alp1 = L_mac (alp1, rr[i5][i6], _1_32); /* initialize 3 indices for i7 inner loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); for (i7 = ipos[7]; i7 < L_CODE; i7 += step) { ps2 = add (ps1, dn[i7]); alp2 = L_mac (alp1, rrv[i7], _1_4); alp2 = L_mac (alp2, rr[i6][i7], _1_32); sq2 = mult (ps2, ps2); alp_16 = round (alp2); s = L_msu (L_mult (alp, sq2), sq, alp_16); test (); if (s > 0) { sq = sq2; move16 (); ps = ps2; move16 (); alp = alp_16; move16 (); ia = i6; move16 (); ib = i7; move16 (); } } } i6 = ia; move16 (); i7 = ib; move16 (); /* now finished searching a set of 8 pulses */ test(); if(gsmefrFlag != 0){ /* go on with the two last pulses for GSMEFR */ /*----------------------------------------------------------------* * i8 and i9 loop: * *----------------------------------------------------------------*/ ps0 = ps; move16 (); alp0 = L_mult (alp, _1_2); /* initialize 10 indices for next loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); for (i9 = ipos[9]; i9 < L_CODE; i9 += step) { s = L_mult (rr[i9][i9], _1_16); s = L_mac (s, rr[i0][i9], _1_8); s = L_mac (s, rr[i1][i9], _1_8); s = L_mac (s, rr[i2][i9], _1_8); s = L_mac (s, rr[i3][i9], _1_8); s = L_mac (s, rr[i4][i9], _1_8); s = L_mac (s, rr[i5][i9], _1_8); s = L_mac (s, rr[i6][i9], _1_8); s = L_mac (s, rr[i7][i9], _1_8); rrv[i9] = round (s); move16 (); } /* Default value */ sq = -1; move16 (); alp = 1; move16 (); ps = 0; move16 (); ia = ipos[8]; move16 (); ib = ipos[9]; move16 (); /* initialize 10 indices for i8 loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); move16 (); for (i8 = ipos[8]; i8 < L_CODE; i8 += step) { ps1 = add (ps0, dn[i8]); alp1 = L_mac (alp0, rr[i8][i8], _1_128); alp1 = L_mac (alp1, rr[i0][i8], _1_64); alp1 = L_mac (alp1, rr[i1][i8], _1_64); alp1 = L_mac (alp1, rr[i2][i8], _1_64); alp1 = L_mac (alp1, rr[i3][i8], _1_64); alp1 = L_mac (alp1, rr[i4][i8], _1_64); alp1 = L_mac (alp1, rr[i5][i8], _1_64); alp1 = L_mac (alp1, rr[i6][i8], _1_64); alp1 = L_mac (alp1, rr[i7][i8], _1_64); /* initialize 3 indices for i9 inner loop (see i2-i3 loop) */ move16 (); move16 (); move16 (); for (i9 = ipos[9]; i9 < L_CODE; i9 += step) { ps2 = add (ps1, dn[i9]); alp2 = L_mac (alp1, rrv[i9], _1_8); alp2 = L_mac (alp2, rr[i8][i9], _1_64); sq2 = mult (ps2, ps2); alp_16 = round (alp2); s = L_msu (L_mult (alp, sq2), sq, alp_16); test (); if (s > 0) { sq = sq2; move16 (); ps = ps2; move16 (); alp = alp_16; move16 (); ia = i8; move16 (); ib = i9; move16 (); } } } }/* end gsmefrFlag */ /*---------------------------------------------------------------- * * test and memorise if this combination is better than the last one.* *----------------------------------------------------------------*/ s = L_msu (L_mult (alpk, sq), psk, alp); test (); if (s > 0) { psk = sq; move16 (); alpk = alp; move16 (); codvec[0] = i0; move16 (); codvec[1] = i1; move16 (); codvec[2] = i2; move16 (); codvec[3] = i3; move16 (); codvec[4] = i4; move16 (); codvec[5] = i5; move16 (); codvec[6] = i6; move16 (); codvec[7] = i7; move16 (); test(); if (gsmefrFlag != 0) { codvec[8] = ia; move16 (); codvec[9] = ib; move16 (); } } /*----------------------------------------------------------------* * Cyclic permutation of i1,i2,i3,i4,i5,i6,i7,(i8 and i9). * *----------------------------------------------------------------*/ pos = ipos[1]; move16 (); for (j = 1, k = 2; k < nbPulse; j++, k++) { ipos[j] = ipos[k]; move16 (); } ipos[sub(nbPulse,1)] = pos; move16 (); } /* end 1..nbTracks loop*/ }