14f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* ------------------------------------------------------------------ 24f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Copyright (C) 1998-2009 PacketVideo 34f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 44f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 54f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * you may not use this file except in compliance with the License. 64f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * You may obtain a copy of the License at 74f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 84f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 94f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Unless required by applicable law or agreed to in writing, software 114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * express or implied. 144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * See the License for the specific language governing permissions 154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * and limitations under the License. 164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ------------------------------------------------------------------- 174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/**************************************************************************************** 194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPortions of this file are derived from the following 3GPP standard: 204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3GPP TS 26.173 224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec 234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Available from http://www.3gpp.org 244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPermission to distribute, modify and use this file under the standard license 274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberterms listed above has been obtained from the copyright holder. 284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber****************************************************************************************/ 294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Filename: synthesis_amr_wb.cpp 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 05/04/2007 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 Aq[], A(z) : quantized Az 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 exc[], (i) : excitation at 12kHz 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 Q_new, (i) : scaling performed on exc 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 synth16k[], (o) : 16kHz synthesis signal 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 prms, (i) : compressed amr wb 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 HfIsf[], 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 nb_bits, 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 newDTXState, 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Decoder_State * st, (i/o) : State structure 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 bfi, (i) : bad frame indicator 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *ScratchMem 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Synthesis of signal at 16kHz with HF extension 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pv_amr_wb_type_defs.h" 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_mem_funcs.h" 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_basic_op.h" 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_cnst.h" 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_acelp.h" 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "e_pv_amrwbdec.h" 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "get_amr_wb_bits.h" 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwb_math_op.h" 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_api.h" 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "synthesis_amr_wb.h" 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; DEFINES 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Include all pre-processor statements here. Include conditional 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; compile variables also. 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* High Band encoding */ 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberconst int16 HP_gain[16] = 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3624, 4673, 5597, 6479, 7425, 8378, 9324, 10264, 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 11210, 12206, 13391, 14844, 16770, 19655, 24289, 32728 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber}; 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; EXTERNAL FUNCTION REFERENCES 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Declare functions defined elsewhere and referenced in this module 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Declare variables used in this module but defined elsewhere 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; FUNCTION CODE 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid synthesis_amr_wb( 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 Aq[], /* A(z) : quantized Az */ 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 exc[], /* (i) : excitation at 12kHz */ 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 Q_new, /* (i) : scaling performed on exc */ 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 synth16k[], /* (o) : 16kHz synthesis signal */ 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 prms, /* (i) : parameter */ 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 HfIsf[], 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 nb_bits, 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 newDTXState, 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Decoder_State * st, /* (i/o) : State structure */ 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 bfi, /* (i) : bad frame indicator */ 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *ScratchMem 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 i, fac, exp; 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 tmp; 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 ener, exp_ener; 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_tmp; 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 L_tmp2; 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 HF_corr_gain; 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 HF_gain_ind; 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 gain1, gain2; 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *pt_synth; 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *pt_HF; 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *synth_hi = ScratchMem; 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *synth_lo = &ScratchMem[M + L_SUBFR]; 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *synth = &synth_lo[M + L_SUBFR]; 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *HF = &synth[L_SUBFR]; 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *Ap = &HF[L_SUBFR16k]; /* High Frequency vector */ 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *HfA = &Ap[M16k + 1]; 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 *pt_tmp; 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*------------------------------------------------------------* 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * speech synthesis * 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ~~~~~~~~~~~~~~~~ * 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * - Find synthesis speech corresponding to exc2[]. * 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * - Perform fixed deemphasis and hp 50hz filtering. * 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * - Oversampling from 12.8kHz to 16kHz. * 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *------------------------------------------------------------*/ 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pv_memcpy((void *)synth_hi, 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (void *)st->mem_syn_hi, 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber M*sizeof(*synth_hi)); 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pv_memcpy((void *)synth_lo, 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (void *)st->mem_syn_lo, 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber M*sizeof(*synth_lo)); 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Syn_filt_32(Aq, M, exc, Q_new, synth_hi + M, synth_lo + M, L_SUBFR); 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pv_memcpy((void *)st->mem_syn_hi, 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (void *)(synth_hi + L_SUBFR), 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber M*sizeof(*st->mem_syn_hi)); 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pv_memcpy((void *)st->mem_syn_lo, 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (void *)(synth_lo + L_SUBFR), 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber M*sizeof(*st->mem_syn_lo)); 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber deemphasis_32(synth_hi + M, 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber synth_lo + M, 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber synth, 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PREEMPH_FAC, 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_SUBFR, 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber &(st->mem_deemph)); 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber highpass_50Hz_at_12k8(synth, 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_SUBFR, 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->mem_sig_out); 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber oversamp_12k8_to_16k(synth, 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_SUBFR, 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber synth16k, 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->mem_oversamp, 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ScratchMem); 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * HF noise synthesis 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * - Generate HF noise between 5.5 and 7.5 kHz. 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * - Set energy of noise according to synthesis tilt. 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * tilt > 0.8 ==> - 14 dB (voiced) 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * tilt 0.5 ==> - 6 dB (voiced or noise) 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * tilt < 0.0 ==> 0 dB (noise) 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* generate white noise vector */ 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp = HF; 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_SUBFR16k >> 2; i != 0 ; i--) 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp++) = noise_gen_amrwb(&(st->seed2)) >> 3; 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp++) = noise_gen_amrwb(&(st->seed2)) >> 3; 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp++) = noise_gen_amrwb(&(st->seed2)) >> 3; 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp++) = noise_gen_amrwb(&(st->seed2)) >> 3; 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* energy of excitation */ 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp = exc; 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_SUBFR >> 2; i != 0; i--) 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = add_int16(*(pt_tmp), 0x0004) >> 3; 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = add_int16(*(pt_tmp), 0x0004) >> 3; 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = add_int16(*(pt_tmp), 0x0004) >> 3; 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = add_int16(*(pt_tmp), 0x0004) >> 3; 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Q_new -= 3; 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ener = extract_h(Dot_product12(exc, exc, L_SUBFR, &exp_ener)); 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber exp_ener -= Q_new << 1; 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* set energy of white noise to energy of excitation */ 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = extract_h(Dot_product12(HF, HF, L_SUBFR16k, &exp)); 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (tmp > ener) 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp >>= 1; /* Be sure tmp < ener */ 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber exp += 1; 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_deposit_h(div_16by16(tmp, ener)); /* result is normalized */ 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber exp -= exp_ener; 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber one_ov_sqrt_norm(&L_tmp, &exp); 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = shl_int32(L_tmp, exp + 1); /* L_tmp x 2, L_tmp in Q31 */ 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = (int16)(L_tmp >> 16); /* tmp = 2 x sqrt(ener_exc/ener_hf) */ 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp = HF; 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_SUBFR16k >> 2; i != 0 ; i--) 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = (int16)(fxp_mul_16by16(*(pt_tmp), tmp) >> 15); 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = (int16)(fxp_mul_16by16(*(pt_tmp), tmp) >> 15); 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = (int16)(fxp_mul_16by16(*(pt_tmp), tmp) >> 15); 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = (int16)(fxp_mul_16by16(*(pt_tmp), tmp) >> 15); 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* find tilt of synthesis speech (tilt: 1=voiced, -1=unvoiced) */ 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber highpass_400Hz_at_12k8(synth, L_SUBFR, st->mem_hp400); 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = 1L; 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp2 = 1L; 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = mac_16by16_to_int32(L_tmp, synth[0], synth[0]); 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 1; i < L_SUBFR; i++) 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = mac_16by16_to_int32(L_tmp, synth[i], synth[i ]); 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp2 = mac_16by16_to_int32(L_tmp2, synth[i], synth[i - 1]); 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber exp = normalize_amr_wb(L_tmp); 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ener = (int16)((L_tmp << exp) >> 16); /* ener = r[0] */ 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = (int16)((L_tmp2 << exp) >> 16); /* tmp = r[1] */ 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (tmp > 0) 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber fac = div_16by16(tmp, ener); 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber fac = 0; 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* modify energy of white noise according to synthesis tilt */ 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gain1 = 32767 - fac; 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gain2 = mult_int16(gain1, 20480); 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gain2 = shl_int16(gain2, 1); 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (st->vad_hist > 0) 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = gain2 - 1; 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = gain1 - 1; 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (tmp != 0) 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp++; 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (tmp < 3277) 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = 3277; /* 0.1 in Q15 */ 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((nb_bits >= NBBITS_24k) && (bfi == 0)) 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* HF correction gain */ 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HF_gain_ind = prms; 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HF_corr_gain = HP_gain[HF_gain_ind]; 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp = HF; 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_SUBFR16k >> 2; i != 0 ; i--) 3504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), HF_corr_gain) << 1; 3524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), HF_corr_gain) << 1; 3544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), HF_corr_gain) << 1; 3564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), HF_corr_gain) << 1; 3584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* HF gain */ 3624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp = HF; 3664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_SUBFR16k >> 2; i != 0 ; i--) 3674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), tmp); 3694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), tmp); 3714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), tmp); 3734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_tmp) = mult_int16(*(pt_tmp), tmp); 3754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_tmp++; 3764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((nb_bits <= NBBITS_7k) && (newDTXState == SPEECH)) 3814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber isf_extrapolation(HfIsf); 3834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Isp_Az(HfIsf, HfA, M16k, 0); 3844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber weight_amrwb_lpc(HfA, Ap, 29491, M16k); /* fac=0.9 */ 3864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber wb_syn_filt(Ap, 3884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber M16k, 3894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HF, 3904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HF, 3914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_SUBFR16k, 3924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->mem_syn_hf, 3934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1, 3944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ScratchMem); 3954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* synthesis of noise: 4.8kHz..5.6kHz --> 6kHz..7kHz */ 3994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber weight_amrwb_lpc(Aq, Ap, 19661, M); /* fac=0.6 */ 4004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber wb_syn_filt(Ap, 4024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber M, 4034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HF, 4044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HF, 4054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_SUBFR16k, 4064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->mem_syn_hf + (M16k - M), 4074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1, 4084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ScratchMem); 4094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* noise Band Pass filtering (1ms of delay) */ 4124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber band_pass_6k_7k(HF, 4134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_SUBFR16k, 4144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->mem_hf, 4154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ScratchMem); 4164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (nb_bits >= NBBITS_24k) 4194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Low Pass filtering (7 kHz) */ 4214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber low_pass_filt_7k(HF, 4224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_SUBFR16k, 4234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->mem_hf3, 4244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ScratchMem); 4254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* add filtered HF noise to speech synthesis */ 4274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_synth = synth16k; 4294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_HF = HF; 4304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_SUBFR16k >> 1; i != 0; i--) 4324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_synth) = add_int16(*(pt_synth), *(pt_HF++)); /* check 16 bit saturation */ 4344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_synth++; 4354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pt_synth) = add_int16(*(pt_synth), *(pt_HF++)); 4364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pt_synth++; 4374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 4404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 441