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: isp_az.cpp 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 05/08/2004 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 isp[], (i) Q15 : Immittance spectral pairs 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 a[], (o) Q12 : predictor coefficients (order=M) 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 m, (i) : order 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 adaptive_scaling (i) 0 : adaptive scaling disabled 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1 : adaptive scaling enabled 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Compute the LPC coefficients from isp (order=M) 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pv_amr_wb_type_defs.h" 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_basic_op.h" 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_cnst.h" 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwbdecoder_acelp.h" 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pvamrwb_math_op.h" 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; DEFINES 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Include all pre-processor statements here. Include conditional 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; compile variables also. 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define NC (M/2) 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define NC16k (M16k/2) 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberextern "C" 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber void Get_isp_pol(int16 * isp, int32 * f, int16 n); 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber void Get_isp_pol_16kHz(int16 * isp, int32 * f, int16 n); 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; EXTERNAL FUNCTION REFERENCES 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Declare functions defined elsewhere and referenced in this module 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Declare variables used in this module but defined elsewhere 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; FUNCTION CODE 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Isp_Az( 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 isp[], /* (i) Q15 : Immittance spectral pairs */ 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 a[], /* (o) Q12 : predictor coefficients (order=M) */ 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 m, /* (i) : order */ 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 adaptive_scaling /* (i) 0 : adaptive scaling disabled */ 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1 : adaptive scaling enabled */ 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 i, j; 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 f1[NC16k + 1], f2[NC16k]; 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 nc; 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 t0; 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 t1; 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 q, q_sug; 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 tmax; 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber nc = m >> 1; 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (nc > 8) 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Get_isp_pol_16kHz(&isp[0], f1, nc); 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i <= nc; i++) 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f1[i] = shl_int32(f1[i], 2); 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Get_isp_pol_16kHz(&isp[1], f2, nc - 1); 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i <= nc - 1; i++) 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f2[i] = shl_int32(f2[i], 2); 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Get_isp_pol(&isp[0], f1, nc); 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Get_isp_pol(&isp[1], f2, nc - 1); 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Multiply F2(z) by (1 - z^-2) 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = nc - 1; i > 1; i--) 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f2[i] -= f2[i - 2]; /* f2[i] -= f2[i-2]; */ 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Scale F1(z) by (1+isp[m-1]) and F2(z) by (1-isp[m-1]) 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < nc; i++) 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* f1[i] *= (1.0 + isp[M-1]); */ 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* f2[i] *= (1.0 - isp[M-1]); */ 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = f1[i]; 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t1 = f2[i]; 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = fxp_mul32_by_16b(t0, isp[m - 1]) << 1; 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t1 = fxp_mul32_by_16b(t1, isp[m - 1]) << 1; 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f1[i] += t0; 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f2[i] -= t1; 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * A(z) = (F1(z)+F2(z))/2 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * F1(z) is symmetric and F2(z) is antisymmetric 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* a[0] = 1.0; */ 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[0] = 4096; 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmax = 1; 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber j = m - 1; 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 1; i < nc; i++) 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* a[i] = 0.5*(f1[i] + f2[i]); */ 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = add_int32(f1[i], f2[i]); /* f1[i] + f2[i] */ 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* compute t1 = abs(t0) */ 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t1 = t0 - (t0 < 0); 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t1 = t1 ^(t1 >> 31); /* t1 = t1 ^sign(t1) */ 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmax |= t1; 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* from Q23 to Q12 and * 0.5 */ 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[i] = (int16)((t0 >> 12) + ((t0 >> 11) & 1)); 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* a[j] = 0.5*(f1[i] - f2[i]); */ 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = sub_int32(f1[i], f2[i]); /* f1[i] - f2[i] */ 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* compute t1 = abs(t0) */ 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t1 = t0 - (t0 < 0); 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t1 = t1 ^(t1 >> 31); /* t1 = t1 ^sign(t1) */ 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmax |= t1; 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* from Q23 to Q12 and * 0.5 */ 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[j--] = (int16)((t0 >> 12) + ((t0 >> 11) & 1)); 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* rescale data if overflow has occured and reprocess the loop */ 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (adaptive_scaling == 1) 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber q = 4 - normalize_amr_wb(tmax); /* adaptive scaling enabled */ 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber q = 0; /* adaptive scaling disabled */ 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (q > 0) 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber q_sug = 12 + q; 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 1, j = m - 1; i < nc; i++, j--) 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* a[i] = 0.5*(f1[i] + f2[i]); */ 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = add_int32(f1[i], f2[i]); /* f1[i] + f2[i] */ 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* from Q23 to Q12 and * 0.5 */ 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[i] = (int16)((t0 >> q_sug) + ((t0 >> (q_sug - 1)) & 1)); 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* a[j] = 0.5*(f1[i] - f2[i]); */ 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = sub_int32(f1[i], f2[i]); /* f1[i] - f2[i] */ 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* from Q23 to Q12 and * 0.5 */ 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[j] = (int16)((t0 >> q_sug) + ((t0 >> (q_sug - 1)) & 1)); 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[0] >>= q; 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber q_sug = 12; 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber q = 0; 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* a[NC] = 0.5*f1[NC]*(1.0 + isp[M-1]); */ 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = (int32)(((int64)f1[nc] * isp[m - 1]) >> 16) << 1; 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = add_int32(f1[nc], t0); 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* from Q23 to Q12 and * 0.5 */ 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[nc] = (int16)((t0 >> q_sug) + ((t0 >> (q_sug - 1)) & 1)); 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a[m] = shr_rnd(isp[m - 1], (3 + q)); /* from Q15 to Q12 */ 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* a[m] = isp[m-1]; */ 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberGet_isp_pol 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber isp[] : isp vector (cosine domaine) in Q15 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f[] : the coefficients of F1 or F2 in Q23 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber n : == NC for F1(z); == NC-1 for F2(z) 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Find the polynomial F1(z) or F2(z) from the ISPs. 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This is performed by expanding the product polynomials: 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber F1(z) = product ( 1 - 2 isp_i z^-1 + z^-2 ) 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i=0,2,4,6,8 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber F2(z) = product ( 1 - 2 isp_i z^-1 + z^-2 ) 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i=1,3,5,7 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where isp_i are the ISPs in the cosine domain. 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; FUNCTION CODE 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Get_isp_pol(int16 * isp, int32 * f, int16 n) 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 i, j; 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 t0; 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* All computation in Q23 */ 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f[0] = 0x00800000; /* f[0] = 1.0; in Q23 */ 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f[1] = -isp[0] << 9; /* f[1] = -2.0*isp[0] in Q23 */ 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f += 2; /* Advance f pointer */ 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber isp += 2; /* Advance isp pointer */ 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 2; i <= n; i++) 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *f = f[-2]; 3514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (j = 1; j < i; j++) 3534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = fxp_mul32_by_16b(f[-1], *isp); 3564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = shl_int32(t0, 2); 3574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *f -= t0; /* *f -= t0 */ 3594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(f) += f[-2]; /* *f += f[-2] */ 3604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f--; 3614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *f -= *isp << 9; 3654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f += i; /* Advance f pointer */ 3674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber isp += 2; /* Advance isp pointer */ 3684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 3704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Get_isp_pol_16kHz(int16 * isp, int32 * f, int16 n) 3724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 3734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int16 i, j; 3744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int32 t0; 3754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* All computation in Q23 */ 3774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f[0] = 0x00200000; /* f[0] = 0.25; in Q23 */ 3794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f[1] = -isp[0] << 7; /* f[1] = -0.5*isp[0] in Q23 */ 3814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f += 2; /* Advance f pointer */ 3834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber isp += 2; /* Advance isp pointer */ 3844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 2; i <= n; i++) 3864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *f = f[-2]; 3884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (j = 1; j < i; j++, f--) 3904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = fxp_mul32_by_16b(f[-1], *isp); 3924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber t0 = shl_int32(t0, 2); 3934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *f -= t0; /* *f -= t0 */ 3954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *f += f[-2]; /* *f += f[-2] */ 3964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *f -= *isp << 7; 3984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber f += i; /* Advance f pointer */ 3994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber isp += 2; /* Advance isp pointer */ 4004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 4024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 4034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 404