| /* $Id$ */ |
| /* |
| * 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_enc.h" |
| |
| #if defined(PJMEDIA_HAS_G722_CODEC) && (PJMEDIA_HAS_G722_CODEC != 0) |
| |
| #define SATURATE(v, max, min) \ |
| if (v>max) v = max; \ |
| else if (v<min) v = min |
| |
| /* QMF tap coefficients */ |
| const int g722_qmf_coeff[24] = { |
| 3, -11, -11, 53, 12, -156, |
| 32, 362, -210, -805, 951, 3876, |
| 3876, 951, -805, -210, 362, 32, |
| -156, 12, 53, -11, -11, 3 |
| }; |
| |
| |
| static int block1l (int xl, int sl, int detl) |
| { |
| int il ; |
| |
| int i, el, sil, mil, wd, wd1, hdu ; |
| |
| static const int q6[32] = { |
| 0, 35, 72, 110, 150, 190, 233, 276, 323, |
| 370, 422, 473, 530, 587, 650, 714, 786, |
| 858, 940, 1023, 1121, 1219, 1339, 1458, |
| 1612, 1765, 1980, 2195, 2557, 2919, 0, 0 |
| }; |
| |
| static const int iln[32] = { |
| 0, 63, 62, 31, 30, 29, 28, 27, 26, 25, |
| 24, 23, 22, 21, 20, 19, 18, 17, 16, 15, 14, |
| 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 0 |
| }; |
| |
| static const int ilp[32] = { |
| 0, 61, 60, 59, 58, 57, 56, 55, 54, 53, 52, |
| 51, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, |
| 40, 39, 38, 37, 36, 35, 34, 33, 32, 0 |
| }; |
| |
| /* SUBTRA */ |
| |
| el = xl - sl ; |
| SATURATE(el, 32767, -32768); |
| |
| /* QUANTL */ |
| |
| sil = el >> 15 ; |
| if (sil == 0 ) wd = el ; |
| else wd = (32767 - el) & 32767 ; |
| |
| mil = 1 ; |
| |
| for (i = 1; i < 30; i++) { |
| hdu = (q6[i] << 3) * detl; |
| wd1 = (hdu >> 15) ; |
| if (wd >= wd1) mil = (i + 1) ; |
| else break ; |
| } |
| |
| if (sil == -1 ) il = iln[mil] ; |
| else il = ilp[mil] ; |
| |
| return (il) ; |
| } |
| |
| static int block2l (int il, int detl) |
| { |
| int dlt; |
| int ril, wd2 ; |
| static const int qm4[16] = { |
| 0, -20456, -12896, -8968, |
| -6288, -4240, -2584, -1200, |
| 20456, 12896, 8968, 6288, |
| 4240, 2584, 1200, 0 |
| }; |
| |
| /* INVQAL */ |
| ril = il >> 2 ; |
| wd2 = qm4[ril] ; |
| dlt = (detl * wd2) >> 15 ; |
| |
| return (dlt) ; |
| } |
| |
| static int block3l (g722_enc_t *enc, int il) |
| { |
| int detl; |
| int ril, il4, wd, wd1, wd2, wd3, nbpl, depl ; |
| static int const wl[8] = { |
| -60, -30, 58, 172, 334, 538, 1198, 3042 |
| } ; |
| static int const rl42[16] = { |
| 0, 7, 6, 5, 4, 3, 2, 1, 7, 6, 5, 4, 3, 2, 1, 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 |
| }; |
| |
| /* LOGSCL */ |
| |
| ril = il >> 2 ; |
| il4 = rl42[ril] ; |
| |
| wd = (enc->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 */ |
| enc->nbl = nbpl ; |
| |
| /* DELAYL */ |
| detl = depl ; |
| |
| #ifdef DEBUG_VERBOSE |
| printf ("BLOCK3L il=%4d, ril=%4d, il4=%4d, nbl=%4d, wd=%4d, nbpl=%4d\n", |
| il, ril, il4, enc->nbl, wd, nbpl) ; |
| printf ("wd1=%4d, wd2=%4d, wd3=%4d, depl=%4d, detl=%4d\n", |
| wd1, wd2, wd3, depl, detl) ; |
| #endif |
| |
| return (detl) ; |
| } |
| |
| static int block4l (g722_enc_t *enc, int dl) |
| { |
| int sl = enc->slow; |
| int i ; |
| int wd, wd1, wd2, wd3, wd4, wd5 /*, wd6 */; |
| |
| enc->dlt[0] = dl; |
| |
| /* RECONS */ |
| |
| enc->rlt[0] = sl + enc->dlt[0] ; |
| SATURATE(enc->rlt[0], 32767, -32768); |
| |
| /* PARREC */ |
| |
| enc->plt[0] = enc->dlt[0] + enc->szl ; |
| SATURATE(enc->plt[0], 32767, -32768); |
| |
| /* UPPOL2 */ |
| |
| enc->sgl[0] = enc->plt[0] >> 15 ; |
| enc->sgl[1] = enc->plt[1] >> 15 ; |
| enc->sgl[2] = enc->plt[2] >> 15 ; |
| |
| wd1 = enc->al[1] << 2; |
| SATURATE(wd1, 32767, -32768); |
| |
| if ( enc->sgl[0] == enc->sgl[1] ) wd2 = - wd1 ; |
| else wd2 = wd1 ; |
| if ( wd2 > 32767 ) wd2 = 32767; |
| |
| wd2 = wd2 >> 7 ; |
| |
| if ( enc->sgl[0] == enc->sgl[2] ) wd3 = 128 ; |
| else wd3 = - 128 ; |
| |
| wd4 = wd2 + wd3 ; |
| wd5 = (enc->al[2] * 32512) >> 15 ; |
| |
| enc->apl[2] = wd4 + wd5 ; |
| SATURATE(enc->apl[2], 12288, -12288); |
| |
| /* UPPOL1 */ |
| |
| enc->sgl[0] = enc->plt[0] >> 15 ; |
| enc->sgl[1] = enc->plt[1] >> 15 ; |
| |
| if ( enc->sgl[0] == enc->sgl[1] ) wd1 = 192 ; |
| else wd1 = - 192 ; |
| |
| wd2 = (enc->al[1] * 32640) >> 15 ; |
| |
| enc->apl[1] = wd1 + wd2 ; |
| SATURATE(enc->apl[1], 32767, -32768); |
| |
| wd3 = (15360 - enc->apl[2]) ; |
| SATURATE(wd3, 32767, -32768); |
| |
| if ( enc->apl[1] > wd3) enc->apl[1] = wd3 ; |
| if ( enc->apl[1] < -wd3) enc->apl[1] = -wd3 ; |
| |
| /* UPZERO */ |
| |
| if ( enc->dlt[0] == 0 ) wd1 = 0 ; |
| else wd1 = 128 ; |
| |
| enc->sgl[0] = enc->dlt[0] >> 15 ; |
| |
| for ( i = 1; i < 7; i++ ) { |
| enc->sgl[i] = enc->dlt[i] >> 15 ; |
| if ( enc->sgl[i] == enc->sgl[0] ) wd2 = wd1 ; |
| else wd2 = - wd1 ; |
| wd3 = (enc->bl[i] * 32640) >> 15 ; |
| enc->bpl[i] = wd2 + wd3 ; |
| SATURATE(enc->bpl[i], 32767, -32768); |
| } |
| |
| /* DELAYA */ |
| |
| for ( i = 6; i > 0; i-- ) { |
| enc->dlt[i] = enc->dlt[i-1] ; |
| enc->bl[i] = enc->bpl[i] ; |
| } |
| |
| for ( i = 2; i > 0; i-- ) { |
| enc->rlt[i] = enc->rlt[i-1] ; |
| enc->plt[i] = enc->plt[i-1] ; |
| enc->al[i] = enc->apl[i] ; |
| } |
| |
| /* FILTEP */ |
| |
| wd1 = enc->rlt[1] + enc->rlt[1]; |
| SATURATE(wd1, 32767, -32768); |
| wd1 = ( enc->al[1] * wd1 ) >> 15 ; |
| |
| wd2 = enc->rlt[2] + enc->rlt[2]; |
| SATURATE(wd2, 32767, -32768); |
| wd2 = ( enc->al[2] * wd2 ) >> 15 ; |
| |
| enc->spl = wd1 + wd2 ; |
| SATURATE(enc->spl, 32767, -32768); |
| |
| /* FILTEZ */ |
| |
| enc->szl = 0 ; |
| for (i=6; i>0; i--) { |
| wd = enc->dlt[i] + enc->dlt[i]; |
| SATURATE(wd, 32767, -32768); |
| enc->szl += (enc->bl[i] * wd) >> 15 ; |
| SATURATE(enc->szl, 32767, -32768); |
| } |
| |
| /* PREDIC */ |
| |
| sl = enc->spl + enc->szl ; |
| SATURATE(sl, 32767, -32768); |
| |
| return (sl) ; |
| } |
| |
| static int block1h (int xh, int sh, int deth) |
| { |
| int ih ; |
| |
| int eh, sih, mih, wd, wd1, hdu ; |
| |
| static const int ihn[3] = { 0, 1, 0 } ; |
| static const int ihp[3] = { 0, 3, 2 } ; |
| |
| /* SUBTRA */ |
| |
| eh = xh - sh ; |
| SATURATE(eh, 32767, -32768); |
| |
| /* QUANTH */ |
| |
| sih = eh >> 15 ; |
| if (sih == 0 ) wd = eh ; |
| else wd = (32767 - eh) & 32767 ; |
| |
| hdu = (564 << 3) * deth; |
| wd1 = (hdu >> 15) ; |
| if (wd >= wd1) mih = 2 ; |
| else mih = 1 ; |
| |
| if (sih == -1 ) ih = ihn[mih] ; |
| else ih = ihp[mih] ; |
| |
| return (ih) ; |
| } |
| |
| 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_enc_t *enc, 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} ; |
| 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 |
| }; |
| |
| /* LOGSCH */ |
| |
| ih2 = rh2[ih] ; |
| wd = (enc->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 */ |
| enc->nbh = nbph ; |
| /* DELAYH */ |
| deth = deph ; |
| |
| return (deth) ; |
| } |
| |
| static int block4h (g722_enc_t *enc, int d) |
| { |
| int sh = enc->shigh; |
| int i ; |
| int wd, wd1, wd2, wd3, wd4, wd5 /*, wd6 */; |
| |
| enc->dh[0] = d; |
| |
| /* RECONS */ |
| |
| enc->rh[0] = sh + enc->dh[0] ; |
| SATURATE(enc->rh[0], 32767, -32768); |
| |
| /* PARREC */ |
| |
| enc->ph[0] = enc->dh[0] + enc->szh ; |
| SATURATE(enc->ph[0], 32767, -32768); |
| |
| /* UPPOL2 */ |
| |
| enc->sgh[0] = enc->ph[0] >> 15 ; |
| enc->sgh[1] = enc->ph[1] >> 15 ; |
| enc->sgh[2] = enc->ph[2] >> 15 ; |
| |
| wd1 = enc->ah[1] << 2; |
| SATURATE(wd1, 32767, -32768); |
| |
| if ( enc->sgh[0] == enc->sgh[1] ) wd2 = - wd1 ; |
| else wd2 = wd1 ; |
| if ( wd2 > 32767 ) wd2 = 32767; |
| |
| wd2 = wd2 >> 7 ; |
| |
| if ( enc->sgh[0] == enc->sgh[2] ) wd3 = 128 ; |
| else wd3 = - 128 ; |
| |
| wd4 = wd2 + wd3 ; |
| wd5 = (enc->ah[2] * 32512) >> 15 ; |
| |
| enc->aph[2] = wd4 + wd5 ; |
| SATURATE(enc->aph[2], 12288, -12288); |
| |
| /* UPPOL1 */ |
| |
| enc->sgh[0] = enc->ph[0] >> 15 ; |
| enc->sgh[1] = enc->ph[1] >> 15 ; |
| |
| if ( enc->sgh[0] == enc->sgh[1] ) wd1 = 192 ; |
| else wd1 = - 192 ; |
| |
| wd2 = (enc->ah[1] * 32640) >> 15 ; |
| |
| enc->aph[1] = wd1 + wd2 ; |
| SATURATE(enc->aph[1], 32767, -32768); |
| |
| wd3 = (15360 - enc->aph[2]) ; |
| SATURATE(wd3, 32767, -32768); |
| |
| if ( enc->aph[1] > wd3) enc->aph[1] = wd3 ; |
| else if ( enc->aph[1] < -wd3) enc->aph[1] = -wd3 ; |
| |
| /* UPZERO */ |
| |
| if ( enc->dh[0] == 0 ) wd1 = 0 ; |
| else wd1 = 128 ; |
| |
| enc->sgh[0] = enc->dh[0] >> 15 ; |
| |
| for ( i = 1; i < 7; i++ ) { |
| enc->sgh[i] = enc->dh[i] >> 15 ; |
| if ( enc->sgh[i] == enc->sgh[0] ) wd2 = wd1 ; |
| else wd2 = - wd1 ; |
| wd3 = (enc->bh[i] * 32640) >> 15 ; |
| enc->bph[i] = wd2 + wd3 ; |
| SATURATE(enc->bph[i], 32767, -32768); |
| } |
| |
| /* DELAYA */ |
| for ( i = 6; i > 0; i-- ) { |
| enc->dh[i] = enc->dh[i-1] ; |
| enc->bh[i] = enc->bph[i] ; |
| } |
| |
| for ( i = 2; i > 0; i-- ) { |
| enc->rh[i] = enc->rh[i-1] ; |
| enc->ph[i] = enc->ph[i-1] ; |
| enc->ah[i] = enc->aph[i] ; |
| } |
| |
| /* FILTEP */ |
| |
| wd1 = enc->rh[1] + enc->rh[1]; |
| SATURATE(wd1, 32767, -32768); |
| wd1 = ( enc->ah[1] * wd1 ) >> 15 ; |
| |
| wd2 = enc->rh[2] + enc->rh[2]; |
| SATURATE(wd2, 32767, -32768); |
| wd2 = ( enc->ah[2] * wd2 ) >> 15 ; |
| |
| enc->sph = wd1 + wd2 ; |
| SATURATE(enc->sph, 32767, -32768); |
| |
| /* FILTEZ */ |
| |
| enc->szh = 0 ; |
| for (i=6; i>0; i--) { |
| wd = enc->dh[i] + enc->dh[i]; |
| SATURATE(wd, 32767, -32768); |
| enc->szh += (enc->bh[i] * wd) >> 15 ; |
| SATURATE(enc->szh, 32767, -32768); |
| } |
| |
| /* PREDIC */ |
| |
| sh = enc->sph + enc->szh ; |
| SATURATE(sh, 32767, -32768); |
| |
| return (sh) ; |
| } |
| |
| /* PROCESS PCM THROUGH THE QMF FILTER */ |
| static void tx_qmf(g722_enc_t *enc, int pcm1, int pcm2, int *lo, int *hi) |
| { |
| int sumodd, sumeven; |
| int i; |
| |
| pj_memmove(&enc->x[2], enc->x, 22 * sizeof(enc->x[0])); |
| enc->x[1] = pcm1; |
| enc->x[0] = pcm2; |
| |
| sumodd = 0; |
| for (i=1; i<24; i+=2) sumodd += enc->x[i] * g722_qmf_coeff[i]; |
| |
| sumeven = 0; |
| for (i=0; i<24; i+=2) sumeven += enc->x[i] * g722_qmf_coeff[i]; |
| |
| *lo = (sumeven + sumodd) >> 13 ; |
| *hi = (sumeven - sumodd) >> 13 ; |
| |
| SATURATE(*lo, 16383, -16384); |
| SATURATE(*hi, 16383, -16383); |
| } |
| |
| |
| PJ_DEF(pj_status_t) g722_enc_init(g722_enc_t *enc) |
| { |
| PJ_ASSERT_RETURN(enc, PJ_EINVAL); |
| |
| pj_bzero(enc, sizeof(g722_enc_t)); |
| |
| enc->detlow = 32; |
| enc->dethigh = 8; |
| |
| return PJ_SUCCESS; |
| } |
| |
| PJ_DEF(pj_status_t) g722_enc_encode( g722_enc_t *enc, |
| pj_int16_t in[], |
| pj_size_t nsamples, |
| void *out, |
| pj_size_t *out_size) |
| { |
| unsigned i; |
| int xlow, ilow, dlowt; |
| int xhigh, ihigh, dhigh; |
| pj_uint8_t *out_ = (pj_uint8_t*) out; |
| |
| PJ_ASSERT_RETURN(enc && in && nsamples && out && out_size, PJ_EINVAL); |
| PJ_ASSERT_RETURN(nsamples % 2 == 0, PJ_EINVAL); |
| PJ_ASSERT_RETURN(*out_size >= (nsamples >> 1), PJ_ETOOSMALL); |
| |
| for(i = 0; i < nsamples; i += 2) { |
| tx_qmf(enc, in[i], in[i+1], &xlow, &xhigh); |
| |
| /* low band encoder */ |
| ilow = block1l (xlow, enc->slow, enc->detlow) ; |
| dlowt = block2l (ilow, enc->detlow) ; |
| enc->detlow = block3l (enc, ilow) ; |
| enc->slow = block4l (enc, dlowt) ; |
| |
| /* high band encoder */ |
| ihigh = block1h (xhigh, enc->shigh, enc->dethigh) ; |
| dhigh = block2h (ihigh, enc->dethigh) ; |
| enc->dethigh = block3h (enc, ihigh) ; |
| enc->shigh = block4h (enc, dhigh) ; |
| |
| /* bits mix low & high adpcm */ |
| out_[i/2] = (pj_uint8_t)((ihigh << 6) | ilow); |
| } |
| |
| *out_size = nsamples >> 1; |
| |
| return PJ_SUCCESS; |
| } |
| |
| PJ_DEF(pj_status_t) g722_enc_deinit(g722_enc_t *enc) |
| { |
| pj_bzero(enc, sizeof(g722_enc_t)); |
| |
| return PJ_SUCCESS; |
| } |
| |
| #endif |