1b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* ------------------------------------------------------------------ 2b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * Copyright (C) 1998-2009 PacketVideo 3b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * 4b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 5b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * you may not use this file except in compliance with the License. 6b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * You may obtain a copy of the License at 7b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * 8b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 9b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * 10b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * Unless required by applicable law or agreed to in writing, software 11b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 12b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * express or implied. 14b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * See the License for the specific language governing permissions 15b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * and limitations under the License. 16b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * ------------------------------------------------------------------- 17b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 18b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/**************************************************************************************** 19b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberPortions of this file are derived from the following 3GPP standard: 20b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 21b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 3GPP TS 26.073 22b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Available from http://www.3gpp.org 24b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 25b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberPermission to distribute, modify and use this file under the standard license 27b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huberterms listed above has been obtained from the copyright holder. 28b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber****************************************************************************************/ 29b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 30b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 31b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 32b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 33b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 34b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Pathname: ./audio/gsm-amr/c/src/lpc.c 35b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 36b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Date: 01/31/2002 37b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 38b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 39b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REVISION HISTORY 40b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 41b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Updating includes and making code more simple as per comments. 42b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 43b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Replaced OSCL mem type functions and eliminated include 44b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber files that now are chosen by OSCL definitions 45b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 46b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 47b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 48b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: 49b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 50b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 51b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 52b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 53b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 54b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; INCLUDES 55b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 56b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include <stdlib.h> 57b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 58b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "lpc.h" 59b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "typedef.h" 60b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "oper_32b.h" 61b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "autocorr.h" 62b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "lag_wind.h" 63b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "levinson.h" 64b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "cnst.h" 65b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "mode.h" 66b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "window_tab.h" 67b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "sub.h" 68b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 69b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 70b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; MACROS 71b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Define module specific macros here 72b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 73b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 74b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 75b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 76b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; DEFINES 77b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Include all pre-processor statements here. Include conditional 78b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; compile variables also. 79b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 80b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 81b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 82b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 83b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL FUNCTION DEFINITIONS 84b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Function Prototype declaration 85b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 86b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 87b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 88b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 89b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 90b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Variable declaration - defined here and used outside this module 91b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 92b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 93b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 94b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 95b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: lpc_init 96b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 97b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 98b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 99b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 100b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber state = pointer to pointer of state data of type lpcState 101b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 102b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 103b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 104b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 105b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 106b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 107b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 108b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 109b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 110b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 111b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 112b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 113b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 114b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 115b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 116b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 117b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber This function initializes the state data for the LPC module. 118b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 119b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 120b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 121b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 122b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 123b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 124b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 125b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 126b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 127b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 128b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 129b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 130b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 131b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 132b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 133b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpcState* s; 134b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 135b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (state == (lpcState **) NULL){ 136b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // fprintf(stderr, "lpc_init: invalid parameter\n"); 137b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 138b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 139b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *state = NULL; 140b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 141b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // allocate memory 142b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if ((s= (lpcState *) malloc(sizeof(lpcState))) == NULL){ 143b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // fprintf(stderr, "lpc_init: can not malloc state structure\n"); 144b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 145b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 146b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 147b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber s->levinsonSt = NULL; 148b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 149b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Init sub states 150b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (Levinson_init(&s->levinsonSt)) { 151b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc_exit(&s); 152b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 153b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 154b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 155b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 156b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc_reset(s); 157b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *state = s; 158b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 159b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return 0; 160b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 161b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 162b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 163b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 164b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 165b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 166b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 167b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 168b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 169b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 170b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 171b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 172b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 173b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 174b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 175b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 176b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 177b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 178b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 179b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 180b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 181b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 182b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 183b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberWord16 lpc_init(lpcState **state) 184b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 185b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpcState* s; 186b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 187b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (state == (lpcState **) NULL) 188b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 189b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* fprintf(stderr, "lpc_init: invalid parameter\n"); */ 190b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 191b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 192b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *state = NULL; 193b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 194b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* allocate memory */ 195b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if ((s = (lpcState *) malloc(sizeof(lpcState))) == NULL) 196b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 197b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* fprintf(stderr, "lpc_init: can not malloc state structure\n"); */ 198b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 199b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 200b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 201b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber s->levinsonSt = NULL; 202b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 203b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Init sub states */ 204b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (Levinson_init(&s->levinsonSt)) 205b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 206b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc_exit(&s); 207b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 208b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 209b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 210b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc_reset(s); 211b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *state = s; 212b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 213b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return 0; 214b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 215b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 216b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 217b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 218b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: lpc_reset 219b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 220b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 221b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 222b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 223b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber state = pointer to pointer of state data of type lpcState 224b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 225b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 226b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 227b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 228b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 229b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 230b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 231b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 232b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 233b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 234b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 235b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 236b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 237b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 238b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 239b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 240b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber This function resets the state data for the LPC module. 241b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 242b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 243b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 244b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 245b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 246b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 247b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 248b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 249b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 250b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 251b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 252b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 253b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 254b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 255b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (state == (lpcState *) NULL){ 256b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // fprintf(stderr, "lpc_reset: invalid parameter\n"); 257b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 258b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 259b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 260b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson_reset(state->levinsonSt); 261b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 262b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return 0; 263b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 264b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 265b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 266b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 267b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 268b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 269b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 270b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 271b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 272b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 273b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 274b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 275b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 276b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 277b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 278b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 279b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 280b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 281b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 282b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 283b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 284b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 285b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 286b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberWord16 lpc_reset(lpcState *state) 287b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 288b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 289b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (state == (lpcState *) NULL) 290b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 291b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* fprintf(stderr, "lpc_reset: invalid parameter\n"); */ 292b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 293b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 294b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 295b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson_reset(state->levinsonSt); 296b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 297b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return 0; 298b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 299b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 300b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 301b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 302b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: lpc_exit 303b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 304b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 305b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 306b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 307b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber state = pointer to pointer of state data of type lpcState 308b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 309b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 310b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 311b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 312b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 313b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 314b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 315b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 316b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 317b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 318b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 319b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 320b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 321b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 322b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 323b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 324b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber This function frees the state data for the LPC module. 325b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 326b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 327b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 328b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 329b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 330b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 331b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 332b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 333b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 334b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 335b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 336b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 337b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 338b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 339b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 340b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (state == NULL || *state == NULL) 341b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return; 342b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 343b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson_exit(&(*state)->levinsonSt); 344b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 345b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // deallocate memory 346b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber free(*state); 347b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *state = NULL; 348b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 349b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return; 350b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 351b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 352b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 353b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 354b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 355b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 356b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 357b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 358b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 359b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 360b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 361b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 362b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 363b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 364b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 365b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 366b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 367b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 368b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 369b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 370b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 371b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 372b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 373b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 374b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Hubervoid lpc_exit(lpcState **state) 375b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 376b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (state == NULL || *state == NULL) 377b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return; 378b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 379b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson_exit(&(*state)->levinsonSt); 380b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 381b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* deallocate memory */ 382b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber free(*state); 383b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *state = NULL; 384b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 385b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return; 386b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 387b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 388b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 389b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 390b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 391b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: lpc 392b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 393b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 394b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 395b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 396b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber state = pointer to state data of type lpcState 397b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber mode = coder mode of type enum Mode 398b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber x[] = pointer to input signal (Q15) of type Word16 399b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber x_12k2[] = pointer to input signal (EFR) (Q15) of type Word16 400b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pOverflow = pointer to overflow indicator of type Flag 401b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 402b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 403b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber a[] = pointer to predictor coefficients (Q12) of type Word16 404b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 405b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 406b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 407b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 408b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 409b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 410b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 411b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 412b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 413b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 414b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 415b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 416b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 417b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber This function executes the LPC functionality for GSM AMR. 418b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 419b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 420b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 421b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 422b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None. 423b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 424b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 425b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 426b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 427b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 428b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 429b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 430b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 431b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 432b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 rc[4]; // First 4 reflection coefficients Q15 433b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 rLow[MP1], rHigh[MP1]; // Autocorrelations low and hi 434b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // No fixed Q value but normalized 435b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // so that overflow is avoided 436b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 437b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if ( sub ((Word16)mode, (Word16)MR122) == 0) 438b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 439b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Autocorrelations 440b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Autocorr(x_12k2, M, rHigh, rLow, window_160_80); 441b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Lag windowing 442b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Lag_window(M, rHigh, rLow); 443b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Levinson Durbin 444b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson(st->levinsonSt, rHigh, rLow, &a[MP1], rc); 445b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 446b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Autocorrelations 447b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Autocorr(x_12k2, M, rHigh, rLow, window_232_8); 448b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Lag windowing 449b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Lag_window(M, rHigh, rLow); 450b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Levinson Durbin 451b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson(st->levinsonSt, rHigh, rLow, &a[MP1 * 3], rc); 452b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 453b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 454b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 455b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Autocorrelations 456b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Autocorr(x, M, rHigh, rLow, window_200_40); 457b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Lag windowing 458b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Lag_window(M, rHigh, rLow); 459b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber // Levinson Durbin 460b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson(st->levinsonSt, rHigh, rLow, &a[MP1 * 3], rc); 461b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 462b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 463b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return 0; 464b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 465b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 466b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 467b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 468b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 469b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 470b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 471b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 472b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 473b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 474b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 475b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 476b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 477b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 478b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 479b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 480b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 481b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 482b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 483b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 484b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 485b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 486b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 487b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Hubervoid lpc( 488b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber lpcState *st, /* i/o: State struct */ 489b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber enum Mode mode, /* i : coder mode */ 490b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 x[], /* i : Input signal Q15 */ 491b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 x_12k2[], /* i : Input signal (EFR) Q15 */ 492b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 a[], /* o : predictor coefficients Q12 */ 493b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Flag *pOverflow 494b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber) 495b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 496b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 rc[4]; /* First 4 reflection coefficients Q15 */ 497b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 rLow[MP1], rHigh[MP1]; /* Autocorrelations low and hi */ 498b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* No fixed Q value but normalized */ 499b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* so that overflow is avoided */ 500b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 501b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (mode == MR122) 502b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 503b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Autocorrelations */ 504b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Autocorr(x_12k2, M, rHigh, rLow, window_160_80, pOverflow); 505b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Lag windowing */ 506b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Lag_window(M, rHigh, rLow, pOverflow); 507b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Levinson Durbin */ 508b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson(st->levinsonSt, rHigh, rLow, &a[MP1], rc, pOverflow); 509b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 510b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Autocorrelations */ 511b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Autocorr(x_12k2, M, rHigh, rLow, window_232_8, pOverflow); 512b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Lag windowing */ 513b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Lag_window(M, rHigh, rLow, pOverflow); 514b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Levinson Durbin */ 515b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson(st->levinsonSt, rHigh, rLow, &a[MP1 * 3], rc, pOverflow); 516b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 517b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 518b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 519b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Autocorrelations */ 520b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Autocorr(x, M, rHigh, rLow, window_200_40, pOverflow); 521b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Lag windowing */ 522b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Lag_window(M, rHigh, rLow, pOverflow); 523b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* Levinson Durbin */ 524b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Levinson(st->levinsonSt, rHigh, rLow, &a[MP1 * 3], rc, pOverflow); 525b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 526b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 527b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 528b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 529b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 530b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 531b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 532b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 533b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 534b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 535b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 536b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 537b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 538b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 539b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 540b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 541b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 542b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 543