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 26.073 224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Available from http://www.3gpp.org 244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber(C) 2004, 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 Pathname: ./audio/gsm-amr/c/src/pred_lt.c 314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Updated template used to PV coding template. First attempt at 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber optimizing C code. 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Deleted variables listed in the Local Stores Needed/Modified 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sections. 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Updated file per comments from Phase 2/3 review. 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Synchronized file with UMTS version 3.2.0. Updated coding 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber template. Removed unnecessary include files. 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Fixed typecasting issue with TI C compiler. Updated copyright 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber year. 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (1) Removed instance of static in the const table "inter_6" 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (2) Changed Overflow from a global to a parameter passed via a pointer. 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (3) Made numerous small changes to bring code more in line with PV standards. 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: For pred_ltp() 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1. Eliminated unused include files. 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2. Replaced array addressing by pointers 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3. Eliminated math operations that unnecessary checked for 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber saturation 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4. Unrolled loops to speed up processing, use decrement loops, 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber loaded into memory filter coefficient in linear order for 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber faster execution in main loop. 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5. Eliminated call to round by proper initialization 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced "int" and/or "char" with defined types. 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Added proper casting (Word32) to some left shifting operations 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Changed round function name to pv_round to avoid conflict with 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber round function in C standard library. 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Who: Date: 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pred_lt.h" 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 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 UP_SAMP_MAX 6 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define L_INTER10 (L_INTERPOL-1) 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define FIR_SIZE (UP_SAMP_MAX*L_INTER10+1) 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 1/6 resolution interpolation filter (-3 dB at 3600 Hz) */ 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* Note: the 1/3 resolution filter is simply a subsampled 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * version of the 1/6 resolution filter, i.e. it uses 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * every second coefficient: 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * inter_3l[k] = inter_6[2*k], 0 <= k <= 3*L_INTER10 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberconst Word16 inter_6_pred_lt[FIR_SIZE] = 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 29443, 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 28346, 25207, 20449, 14701, 8693, 3143, 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber -1352, -4402, -5865, -5850, -4673, -2783, 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber -672, 1211, 2536, 3130, 2991, 2259, 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1170, 0, -1001, -1652, -1868, -1666, 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber -1147, -464, 218, 756, 1060, 1099, 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 904, 550, 135, -245, -514, -634, 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber -602, -451, -231, 0, 191, 308, 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 340, 296, 198, 78, -36, -120, 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber -163, -165, -132, -79, -19, 34, 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 73, 91, 89, 70, 38, 0 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber}; 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Pred_lt_3or6 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber exc = buffer containing the excitation (Word16) 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber T0 = integer pitch lag (Word16) 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frac = fraction of lag (Word16) 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_subfr = number of samples per subframe (Word16) 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber flag3 = flag to indicate the upsampling rate; if set, upsampling 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber rate is 3, otherwise, upsampling rate is 6 (Word16) 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow = pointer to overflow (Flag) 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber exc buffer contains the newly formed adaptive codebook excitation 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow -> 1 if the add operation resulted in overflow 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber inter_6_pred_lt = (1/6) resolution interpolation filter table (Word16) 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This function computes the result of long term prediction with fractional 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber interpolation of resolution 1/3 or 1/6. (Interpolated past excitation). 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber The past excitation signal at the given delay is interpolated at 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the given fraction to build the adaptive codebook excitation. 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber On return exc[0..L_subfr-1] contains the interpolated signal 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (adaptive codebook excitation). 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pred_lt.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Pred_lt_3or6 ( 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 exc[], // in/out: excitation buffer 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 T0, // input : integer pitch lag 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 frac, // input : fraction of lag 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 L_subfr, // input : subframe size 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 flag3 // input : if set, upsampling rate = 3 (6 otherwise) 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i, j, k; 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *pX0, *pX1, *pX2; 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber const Word16 *pC1, *pC2; 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 s; 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX0 = &exc[-T0]; 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frac = negate (frac); 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (flag3 != 0) 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frac = shl (frac, 1); // inter_3l[k] = inter_6[2*k] -> k' = 2*k 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (frac < 0) 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frac = add (frac, UP_SAMP_MAX); 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX0--; 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (j = 0; j < L_subfr; j++) 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX1 = pX0++; 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX2 = pX0; 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pC1 = &inter_6[frac]; 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pC2 = &inter_6[sub (UP_SAMP_MAX, frac)]; 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s = 0; 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0, k = 0; i < L_INTER10; i++, k += UP_SAMP_MAX) 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s = L_mac (s, pX1[-i], pC1[k]); 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s = L_mac (s, pX2[i], pC2[k]); 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber exc[j] = pv_round (s); 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Pred_lt_3or6( 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 exc[], /* in/out: excitation buffer */ 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 T0, /* input : integer pitch lag */ 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 frac, /* input : fraction of lag */ 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 L_subfr, /* input : subframe size */ 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 flag3, /* input : if set, upsampling rate = 3 (6 otherwise) */ 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow /* output: if set, overflow occurred in this function */ 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber register Word16 i; 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber register Word16 j; 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber register Word16 k; 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *pX0; 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *pX2; 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *pX3; 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_exc; 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *pC1; 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber const Word16 *pC1_ref; 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber const Word16 *pC2_ref; 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Coeff_1[(L_INTER10<<1)]; 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 s1; 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 s2; 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber OSCL_UNUSED_ARG(pOverflow); 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX0 = &(exc[-T0]); 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* frac goes between -3 and 3 */ 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frac = -frac; 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (flag3 != 0) 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frac <<= 1; /* inter_3l[k] = inter_6[2*k] -> k' = 2*k */ 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (frac < 0) 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber frac += UP_SAMP_MAX; 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX0--; 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pC1_ref = &inter_6_pred_lt[frac]; 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pC2_ref = &inter_6_pred_lt[UP_SAMP_MAX-frac]; 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pC1 = Coeff_1; 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber k = 0; 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_INTER10 >> 1; i > 0; i--) 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pC1++) = pC1_ref[k]; 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pC1++) = pC2_ref[k]; 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber k += UP_SAMP_MAX; 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pC1++) = pC1_ref[k]; 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(pC1++) = pC2_ref[k]; 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber k += UP_SAMP_MAX; 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber p_exc = exc; 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (j = (L_subfr >> 1); j != 0 ; j--) 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX0++; 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX2 = pX0; 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pX3 = pX0++; 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pC1 = Coeff_1; 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s1 = 0x00004000L; 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s2 = 0x00004000L; 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_INTER10 >> 1; i > 0; i--) 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s2 += ((Word32) * (pX3--)) * *(pC1); 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s1 += ((Word32) * (pX3)) * *(pC1++); 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s1 += ((Word32) * (pX2++)) * *(pC1); 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s2 += ((Word32) * (pX2)) * *(pC1++); 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s2 += ((Word32) * (pX3--)) * *(pC1); 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s1 += ((Word32) * (pX3)) * *(pC1++); 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s1 += ((Word32) * (pX2++)) * *(pC1); 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber s2 += ((Word32) * (pX2)) * *(pC1++); 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } /* for (i = L_INTER10>>1; i > 0; i--) */ 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_exc++) = (Word16)(s1 >> 15); 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_exc++) = (Word16)(s2 >> 15); 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } /* for (j = (L_subfr>>1); j != 0 ; j--) */ 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 350