/* $Id$ */ /* * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com) * Copyright (C) 2003-2008 Benny Prijono * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * Based on implementation found in Carnegie Mellon Speech Group Software * depository (ftp://ftp.cs.cmu.edu/project/fgdata/index.html). No copyright * was claimed in the original source codes. */ #include #include #include #include "g722_dec.h" #if defined(PJMEDIA_HAS_G722_CODEC) && (PJMEDIA_HAS_G722_CODEC != 0) #define MODE 1 #define SATURATE(v, max, min) \ if (v>max) v = max; \ else if (v> 2 ; wd2 = qm4[ril] ; dlt = (detl * wd2) >> 15 ; return (dlt) ; } static int block3l (g722_dec_t *dec, int il) { int detl ; int ril, il4, wd, wd1, wd2, wd3, nbpl, depl ; static const int wl[8] = { -60, -30, 58, 172, 334, 538, 1198, 3042 }; static const int rl42[16] = { 0, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 0 }; /* LOGSCL */ ril = il >> 2 ; il4 = rl42[ril] ; wd = (dec->nbl * 32512) >> 15 ; nbpl = wd + wl[il4] ; if (nbpl < 0) nbpl = 0 ; if (nbpl > 18432) nbpl = 18432 ; /* SCALEL */ wd1 = (nbpl >> 6) & 31 ; wd2 = nbpl >> 11 ; if ((8 - wd2) < 0) wd3 = ilb[wd1] << (wd2 - 8) ; else wd3 = ilb[wd1] >> (8 - wd2) ; depl = wd3 << 2 ; /* DELAYA */ dec->nbl = nbpl ; /* DELAYL */ detl = depl ; return (detl) ; } static int block4l (g722_dec_t *dec, int dl) { int sl = dec->slow ; int i ; int wd, wd1, wd2, wd3, wd4, wd5/*, wd6 */; dec->dlt[0] = dl; /* RECONS */ dec->rlt[0] = sl + dec->dlt[0] ; SATURATE(dec->rlt[0], 32767, -32768); /* PARREC */ dec->plt[0] = dec->dlt[0] + dec->szl ; SATURATE(dec->plt[0], 32767, -32768); /* UPPOL2 */ dec->sgl[0] = dec->plt[0] >> 15 ; dec->sgl[1] = dec->plt[1] >> 15 ; dec->sgl[2] = dec->plt[2] >> 15 ; wd1 = dec->al[1] << 2; SATURATE(wd1, 32767, -32768); if ( dec->sgl[0] == dec->sgl[1] ) wd2 = - wd1 ; else wd2 = wd1 ; if (wd2 > 32767) wd2 = 32767; wd2 = wd2 >> 7 ; if ( dec->sgl[0] == dec->sgl[2] ) wd3 = 128 ; else wd3 = - 128 ; wd4 = wd2 + wd3 ; wd5 = (dec->al[2] * 32512) >> 15 ; dec->apl[2] = wd4 + wd5 ; SATURATE(dec->apl[2], 12288, -12288); /* UPPOL1 */ dec->sgl[0] = dec->plt[0] >> 15 ; dec->sgl[1] = dec->plt[1] >> 15 ; if ( dec->sgl[0] == dec->sgl[1] ) wd1 = 192 ; else wd1 = - 192 ; wd2 = (dec->al[1] * 32640) >> 15 ; dec->apl[1] = wd1 + wd2 ; SATURATE(dec->apl[1], 32767, -32768); wd3 = (15360 - dec->apl[2]) ; SATURATE(wd3, 32767, -32768); if ( dec->apl[1] > wd3) dec->apl[1] = wd3 ; if ( dec->apl[1] < -wd3) dec->apl[1] = -wd3 ; /* UPZERO */ if ( dec->dlt[0] == 0 ) wd1 = 0 ; else wd1 = 128 ; dec->sgl[0] = dec->dlt[0] >> 15 ; for ( i = 1; i < 7; i++ ) { dec->sgl[i] = dec->dlt[i] >> 15 ; if ( dec->sgl[i] == dec->sgl[0] ) wd2 = wd1 ; else wd2 = - wd1 ; wd3 = (dec->bl[i] * 32640) >> 15 ; dec->bpl[i] = wd2 + wd3 ; SATURATE(dec->bpl[i], 32767, -32768); } /* DELAYA */ for ( i = 6; i > 0; i-- ) { dec->dlt[i] = dec->dlt[i-1] ; dec->bl[i] = dec->bpl[i] ; } for ( i = 2; i > 0; i-- ) { dec->rlt[i] = dec->rlt[i-1] ; dec->plt[i] = dec->plt[i-1] ; dec->al[i] = dec->apl[i] ; } /* FILTEP */ wd1 = dec->rlt[1] << 1; SATURATE(wd1, 32767, -32768); wd1 = ( dec->al[1] * wd1 ) >> 15 ; wd2 = dec->rlt[2] << 1; SATURATE(wd2, 32767, -32768); wd2 = ( dec->al[2] * wd2 ) >> 15 ; dec->spl = wd1 + wd2 ; SATURATE(dec->spl, 32767, -32768); /* FILTEZ */ dec->szl = 0 ; for (i=6; i>0; i--) { wd = dec->dlt[i] << 1; SATURATE(wd, 32767, -32768); dec->szl += (dec->bl[i] * wd) >> 15 ; SATURATE(dec->szl, 32767, -32768); } /* PREDIC */ sl = dec->spl + dec->szl ; SATURATE(sl, 32767, -32768); return (sl) ; } static int block5l (int ilr, int sl, int detl, int mode) { int yl ; int ril, dl, wd2 = 0; static const int qm5[32] = { -280, -280, -23352, -17560, -14120, -11664, -9752, -8184, -6864, -5712, -4696, -3784, -2960, -2208, -1520, -880, 23352, 17560, 14120, 11664, 9752, 8184, 6864, 5712, 4696, 3784, 2960, 2208, 1520, 880, 280, -280 }; static const int qm6[64] = { -136, -136, -136, -136, -24808, -21904, -19008, -16704, -14984, -13512, -12280, -11192, -10232, -9360, -8576, -7856, -7192, -6576, -6000, -5456, -4944, -4464, -4008, -3576, -3168, -2776, -2400, -2032, -1688, -1360, -1040, -728, 24808, 21904, 19008, 16704, 14984, 13512, 12280, 11192, 10232, 9360, 8576, 7856, 7192, 6576, 6000, 5456, 4944, 4464, 4008, 3576, 3168, 2776, 2400, 2032, 1688, 1360, 1040, 728, 432, 136, -432, -136 }; /* INVQBL */ if (mode == 1) { ril = ilr ; wd2 = qm6[ril] ; } if (mode == 2) { ril = ilr >> 1 ; wd2 = qm5[ril] ; } if (mode == 3) { ril = ilr >> 2 ; wd2 = qm4[ril] ; } dl = (detl * wd2 ) >> 15 ; /* RECONS */ yl = sl + dl ; SATURATE(yl, 32767, -32768); return (yl) ; } static int block6l (int yl) { int rl ; rl = yl ; SATURATE(rl, 16383, -16384); return (rl) ; } static int block2h (int ih, int deth) { int dh ; int wd2 ; static const int qm2[4] = {-7408, -1616, 7408, 1616} ; /* INVQAH */ wd2 = qm2[ih] ; dh = (deth * wd2) >> 15 ; return (dh) ; } static int block3h (g722_dec_t *dec, int ih) { int deth ; int ih2, wd, wd1, wd2, wd3, nbph, deph ; static const int wh[3] = {0, -214, 798} ; static const int rh2[4] = {2, 1, 2, 1} ; /* LOGSCH */ ih2 = rh2[ih] ; wd = (dec->nbh * 32512) >> 15 ; nbph = wd + wh[ih2] ; if (nbph < 0) nbph = 0 ; if (nbph > 22528) nbph = 22528 ; /* SCALEH */ wd1 = (nbph >> 6) & 31 ; wd2 = nbph >> 11 ; if ((10 - wd2) < 0) wd3 = ilb[wd1] << (wd2 - 10) ; else wd3 = ilb[wd1] >> (10 - wd2) ; deph = wd3 << 2 ; /* DELAYA */ dec->nbh = nbph ; /* DELAYH */ deth = deph ; return (deth) ; } static int block4h (g722_dec_t *dec, int d) { int sh = dec->shigh; int i ; int wd, wd1, wd2, wd3, wd4, wd5/*, wd6 */; dec->dh[0] = d; /* RECONS */ dec->rh[0] = sh + dec->dh[0] ; SATURATE(dec->rh[0], 32767, -32768); /* PARREC */ dec->ph[0] = dec->dh[0] + dec->szh ; SATURATE(dec->ph[0], 32767, -32768); /* UPPOL2 */ dec->sgh[0] = dec->ph[0] >> 15 ; dec->sgh[1] = dec->ph[1] >> 15 ; dec->sgh[2] = dec->ph[2] >> 15 ; wd1 = dec->ah[1] << 2; SATURATE(wd1, 32767, -32768); if ( dec->sgh[0] == dec->sgh[1] ) wd2 = - wd1 ; else wd2 = wd1 ; if (wd2 > 32767) wd2 = 32767; wd2 = wd2 >> 7 ; if ( dec->sgh[0] == dec->sgh[2] ) wd3 = 128 ; else wd3 = - 128 ; wd4 = wd2 + wd3 ; wd5 = (dec->ah[2] * 32512) >> 15 ; dec->aph[2] = wd4 + wd5 ; SATURATE(dec->aph[2], 12288, -12288); /* UPPOL1 */ dec->sgh[0] = dec->ph[0] >> 15 ; dec->sgh[1] = dec->ph[1] >> 15 ; if ( dec->sgh[0] == dec->sgh[1] ) wd1 = 192 ; else wd1 = - 192 ; wd2 = (dec->ah[1] * 32640) >> 15 ; dec->aph[1] = wd1 + wd2 ; SATURATE(dec->aph[1], 32767, -32768); //dec->aph[2]? //if (aph[2] > 32767) aph[2] = 32767; //if (aph[2] < -32768) aph[2] = -32768; wd3 = (15360 - dec->aph[2]) ; SATURATE(wd3, 32767, -32768); if ( dec->aph[1] > wd3) dec->aph[1] = wd3 ; if ( dec->aph[1] < -wd3) dec->aph[1] = -wd3 ; /* UPZERO */ if ( dec->dh[0] == 0 ) wd1 = 0 ; if ( dec->dh[0] != 0 ) wd1 = 128 ; dec->sgh[0] = dec->dh[0] >> 15 ; for ( i = 1; i < 7; i++ ) { dec->sgh[i] = dec->dh[i] >> 15 ; if ( dec->sgh[i] == dec->sgh[0] ) wd2 = wd1 ; else wd2 = - wd1 ; wd3 = (dec->bh[i] * 32640) >> 15 ; dec->bph[i] = wd2 + wd3 ; } /* DELAYA */ for ( i = 6; i > 0; i-- ) { dec->dh[i] = dec->dh[i-1] ; dec->bh[i] = dec->bph[i] ; } for ( i = 2; i > 0; i-- ) { dec->rh[i] = dec->rh[i-1] ; dec->ph[i] = dec->ph[i-1] ; dec->ah[i] = dec->aph[i] ; } /* FILTEP */ wd1 = dec->rh[1] << 1 ; SATURATE(wd1, 32767, -32768); wd1 = ( dec->ah[1] * wd1 ) >> 15 ; wd2 = dec->rh[2] << 1; SATURATE(wd2, 32767, -32768); wd2 = ( dec->ah[2] * wd2 ) >> 15 ; dec->sph = wd1 + wd2 ; SATURATE(dec->sph, 32767, -32768); /* FILTEZ */ dec->szh = 0 ; for (i=6; i>0; i--) { wd = dec->dh[i] << 1; SATURATE(wd, 32767, -32768); dec->szh += (dec->bh[i] * wd) >> 15 ; SATURATE(dec->szh, 32767, -32768); } /* PREDIC */ sh = dec->sph + dec->szh ; SATURATE(sh, 32767, -32768); return (sh) ; } static int block5h (int dh, int sh) { int rh ; rh = dh + sh; SATURATE(rh, 16383, -16384); return (rh) ; } void rx_qmf(g722_dec_t *dec, int rl, int rh, int *xout1, int *xout2) { int i; pj_memmove(&dec->xd[1], dec->xd, 11*sizeof(dec->xd[0])); pj_memmove(&dec->xs[1], dec->xs, 11*sizeof(dec->xs[0])); /* RECA */ dec->xd[0] = rl - rh ; if (dec->xd[0] > 16383) dec->xd[0] = 16383; else if (dec->xd[0] < -16384) dec->xd[0] = -16384; /* RECB */ dec->xs[0] = rl + rh ; if (dec->xs[0] > 16383) dec->xs[0] = 16383; else if (dec->xs[0] < -16384) dec->xs[0] = -16384; /* ACCUMC */ *xout1 = 0; for (i=0; i<12; ++i) *xout1 += dec->xd[i] * g722_qmf_coeff[2*i]; *xout1 = *xout1 >> 12 ; if (*xout1 > 16383) *xout1 = 16383 ; else if (*xout1 < -16384) *xout1 = -16384 ; /* ACCUMD */ *xout2 = 0; for (i=0; i<12; ++i) *xout2 += dec->xs[i] * g722_qmf_coeff[2*i+1]; *xout2 = *xout2 >> 12 ; if (*xout2 > 16383) *xout2 = 16383 ; else if (*xout2 < -16384) *xout2 = -16384 ; } PJ_DEF(pj_status_t) g722_dec_init(g722_dec_t *dec) { PJ_ASSERT_RETURN(dec, PJ_EINVAL); pj_bzero(dec, sizeof(g722_dec_t)); dec->detlow = 32; dec->dethigh = 8; return PJ_SUCCESS; } PJ_DEF(pj_status_t) g722_dec_decode( g722_dec_t *dec, void *in, pj_size_t in_size, pj_int16_t out[], pj_size_t *nsamples) { unsigned i; int ilowr, ylow, rlow, dlowt; int ihigh, rhigh, dhigh; pj_uint8_t *in_ = (pj_uint8_t*) in; PJ_ASSERT_RETURN(dec && in && in_size && out && nsamples, PJ_EINVAL); PJ_ASSERT_RETURN(*nsamples >= (in_size << 1), PJ_ETOOSMALL); for(i = 0; i < in_size; ++i) { ilowr = in_[i] & 63; ihigh = (in_[i] >> 6) & 3; /* low band decoder */ ylow = block5l (ilowr, dec->slow, dec->detlow, MODE) ; rlow = block6l (ylow) ; dlowt = block2l (ilowr, dec->detlow) ; dec->detlow = block3l (dec, ilowr) ; dec->slow = block4l (dec, dlowt) ; /* rlow <= output low band pcm */ /* high band decoder */ dhigh = block2h (ihigh, dec->dethigh) ; rhigh = block5h (dhigh, dec->shigh) ; dec->dethigh = block3h (dec, ihigh) ; dec->shigh = block4h (dec, dhigh) ; /* rhigh <= output high band pcm */ rx_qmf(dec, rlow, rhigh, &out[i*2], &out[i*2+1]); } *nsamples = in_size << 1; return PJ_SUCCESS; } PJ_DEF(pj_status_t) g722_dec_deinit(g722_dec_t *dec) { pj_bzero(dec, sizeof(g722_dec_t)); return PJ_SUCCESS; } #endif