| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| * |
| * 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 <pjmedia/errno.h> |
| #include <pj/assert.h> |
| #include <pj/pool.h> |
| |
| #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<min) v = min |
| |
| extern const int g722_qmf_coeff[24]; |
| |
| static const int qm4[16] = |
| { |
| 0, -20456, -12896, -8968, |
| -6288, -4240, -2584, -1200, |
| 20456, 12896, 8968, 6288, |
| 4240, 2584, 1200, 0 |
| }; |
| static const int ilb[32] = { |
| 2048, 2093, 2139, 2186, 2233, 2282, 2332, |
| 2383, 2435, 2489, 2543, 2599, 2656, 2714, |
| 2774, 2834, 2896, 2960, 3025, 3091, 3158, |
| 3228, 3298, 3371, 3444, 3520, 3597, 3676, |
| 3756, 3838, 3922, 4008 |
| }; |
| |
| |
| static int block2l (int il, int detl) |
| { |
| int dlt ; |
| int ril, wd2 ; |
| |
| /* INVQAL */ |
| ril = il >> 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; |
| int pcm1, pcm2; |
| 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, &pcm1, &pcm2); |
| out[i*2] = (pj_int16_t)pcm1; |
| out[i*2+1] = (pj_int16_t)pcm2; |
| } |
| |
| *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 |