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/g_adapt.c 35b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Functions: 36b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 37b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Date: 02/04/2002 38b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 39b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 40b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REVISION HISTORY 41b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 42b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Updated template used to PV coding template. 43b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Changed to accept the pOverflow flag for EPOC compatibility. 44b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 45b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Replaced OSCL mem type functions and eliminated include 46b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber files that now are chosen by OSCL definitions 47b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 48b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 49b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 50b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: 51b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 52b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 53b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber MODULE DESCRIPTION 54b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 55b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 56b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 57b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 58b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 59b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 60b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; INCLUDES 61b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 62b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include <stdlib.h> 63b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 64b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "g_adapt.h" 65b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "typedef.h" 66b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "basic_op.h" 67b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "oper_32b.h" 68b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "cnst.h" 69b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "gmed_n.h" 70b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 71b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 72b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; MACROS 73b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Define module specific macros here 74b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 75b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 76b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 77b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; DEFINES 78b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Include all pre-processor statements here. Include conditional 79b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; compile variables also. 80b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 81b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#define LTP_GAIN_THR1 2721 /* 2721 Q13 = 0.3322 ~= 1.0 / (10*log10(2)) */ 82b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#define LTP_GAIN_THR2 5443 /* 5443 Q13 = 0.6644 ~= 2.0 / (10*log10(2)) */ 83b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 84b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 85b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL FUNCTION DEFINITIONS 86b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Function Prototype declaration 87b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 88b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 89b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 90b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL VARIABLE DEFINITIONS 91b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Variable declaration - defined here and used outside this module 92b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 93b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 94b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 95b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 96b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 97b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: gain_adapt_init 98b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 99b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 100b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 101b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 102b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st -- double pointer to GainAdaptState 103b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 104b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 105b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st -- double ponter to GainAdaptState 106b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 107b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 108b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber -1 if an error occurs during memory initialization 109b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 0 if OK 110b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 111b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 112b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 113b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 114b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 115b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 116b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 117b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 118b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 119b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 120b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Allocates state memory and initializes state memory 121b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 122b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 123b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 124b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 125b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 126b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 127b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 128b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 129b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 130b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber g_adapt.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 131b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 132b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 133b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 134b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 135b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 136b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 137b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 138b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 139b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 140b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 141b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 142b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 143b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 144b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 145b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 146b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 147b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 148b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 149b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 150b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 151b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 152b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 153b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 154b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 155b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 156b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 157b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 158b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 159b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberWord16 gain_adapt_init(GainAdaptState **st) 160b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 161b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber GainAdaptState* s; 162b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 163b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (st == (GainAdaptState **) NULL) 164b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 165b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* fprintf(stderr, "gain_adapt_init: invalid parameter\n"); */ 166b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 167b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 168b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *st = NULL; 169b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 170b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* allocate memory */ 171b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if ((s = (GainAdaptState *) malloc(sizeof(GainAdaptState))) == NULL) 172b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 173b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* fprintf(stderr, "gain_adapt_init: can't malloc state structure\n"); */ 174b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 175b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 176b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain_adapt_reset(s); 177b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *st = s; 178b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 179b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return 0; 180b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 181b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 182b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 183b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 184b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: gain_adapt_reset 185b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 186b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 187b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 188b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 189b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st -- double pointer to GainAdaptState 190b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 191b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 192b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st -- double ponter to GainAdaptState 193b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 194b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 195b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber -1 if an error occurs 196b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 0 if OK 197b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 198b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 199b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 200b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 201b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 202b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 203b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 204b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 205b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 206b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 207b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Initializes state memory to zero 208b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 209b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 210b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 211b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 212b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 213b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 214b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 215b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 216b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber g_adapt.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 217b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 218b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 219b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 220b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 221b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 222b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 223b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 224b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 225b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 226b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 227b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 228b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 229b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 230b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 231b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 232b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 233b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 234b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 235b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 236b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 237b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 238b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 239b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 240b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 241b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 242b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 243b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 244b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 245b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberWord16 gain_adapt_reset(GainAdaptState *st) 246b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 247b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 i; 248b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 249b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (st == (GainAdaptState *) NULL) 250b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 251b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* fprintf(stderr, "gain_adapt_reset: invalid parameter\n"); */ 252b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return -1; 253b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 254b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 255b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->onset = 0; 256b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->prev_alpha = 0; 257b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->prev_gc = 0; 258b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 259b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber for (i = 0; i < LTPG_MEM_SIZE; i++) 260b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 261b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->ltpg_mem[i] = 0; 262b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 263b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 264b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return 0; 265b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 266b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 267b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 268b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 269b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 270b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: gain_adapt_exit 271b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 272b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 273b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 274b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 275b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st -- double pointer to GainAdaptState 276b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 277b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 278b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 279b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 280b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 281b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 282b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 283b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 284b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 285b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 286b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 287b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 288b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 289b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 290b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 291b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 292b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber The memory used for state memory is freed 293b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 294b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 295b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 296b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 297b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 298b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 299b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 300b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 301b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber g_adapt.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 302b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 303b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 304b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 305b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 306b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 307b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 308b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 309b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 310b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 311b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 312b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 313b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 314b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 315b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 316b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 317b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 318b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 319b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 320b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 321b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 322b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 323b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 324b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 325b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 326b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 327b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 328b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 329b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 330b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Hubervoid gain_adapt_exit(GainAdaptState **st) 331b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 332b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (st == NULL || *st == NULL) 333b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return; 334b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 335b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* deallocate memory */ 336b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber free(*st); 337b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *st = NULL; 338b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 339b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return; 340b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 341b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 342b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 343b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 344b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: gain_adapt 345b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 346b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 347b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 348b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 349b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st -- double pointer to GainAdaptState 350b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ltpg -- Word16 -- ltp coding gain (log2()), Q13 351b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain_cod -- Word16 -- code gain, Q1 352b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 353b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 354b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber alpha -- Pointer to Word16 -- gain adaptation factor, Q15 355b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pOverflow -- Pointer to Flag -- overflow indicator 356b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 357b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 358b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 359b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 360b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 361b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 362b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 363b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 364b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 365b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 366b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 367b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 368b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 369b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Purpose: calculate pitch/codebook gain adaptation factor alpha 370b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber (and update the adaptor state) 371b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 372b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 373b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 374b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 375b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 376b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 377b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 378b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 379b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 380b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber g_adapt.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 381b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 382b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 383b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 384b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 385b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 386b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 387b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 388b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 389b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 390b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 391b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 392b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 393b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 394b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 395b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 396b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 397b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 398b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 399b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 400b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 401b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 402b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 403b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 404b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 405b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 406b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 407b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 408b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 409b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Hubervoid gain_adapt( 410b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber GainAdaptState *st, /* i : state struct */ 411b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 ltpg, /* i : ltp coding gain (log2()), Q13 */ 412b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 gain_cod, /* i : code gain, Q1 */ 413b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 *alpha, /* o : gain adaptation factor, Q15 */ 414b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Flag *pOverflow 415b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber) 416b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 417b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 adapt; /* adaptdation status; 0, 1, or 2 */ 418b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 result; /* alpha factor, Q13 */ 419b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 filt; /* median-filtered LTP coding gain, Q13 */ 420b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 tmp; 421b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 i; 422b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 423b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* basic adaptation */ 424b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (ltpg <= LTP_GAIN_THR1) 425b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 426b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber adapt = 0; 427b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 428b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 429b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 430b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (ltpg <= LTP_GAIN_THR2) 431b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 432b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber adapt = 1; 433b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 434b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 435b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 436b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber adapt = 2; 437b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 438b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 439b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 440b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* 441b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * // onset indicator 442b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * if ((cbGain > onFact * cbGainMem[0]) && (cbGain > 100.0)) 443b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * onset = 8; 444b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * else 445b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * if (onset) 446b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * onset--; 447b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 448b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* tmp = cbGain / onFact; onFact = 2.0; 200 Q1 = 100.0 */ 449b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber tmp = shr_r(gain_cod, 1, pOverflow); 450b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 451b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if ((tmp > st->prev_gc) && (gain_cod > 200)) 452b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 453b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->onset = 8; 454b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 455b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 456b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 457b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (st->onset != 0) 458b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 459b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->onset = sub(st->onset, 1, pOverflow); 460b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 461b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 462b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 463b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* 464b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * // if onset, increase adaptor state 465b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * if (onset && (gainAdapt < 2)) gainAdapt++; 466b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 467b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if ((st->onset != 0) && (adapt < 2)) 468b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 469b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber adapt = add(adapt, 1, pOverflow); 470b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 471b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 472b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->ltpg_mem[0] = ltpg; 473b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber filt = gmed_n(st->ltpg_mem, 5); /* function result */ 474b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 475b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (adapt == 0) 476b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 477b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (filt > 5443) /* 5443 Q13 = 0.66443... */ 478b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 479b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber result = 0; 480b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 481b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 482b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 483b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (filt < 0) 484b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 485b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber result = 16384; /* 16384 Q15 = 0.5 */ 486b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 487b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 488b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { /* result = 0.5 - 0.75257499*filt */ 489b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* result (Q15) = 16384 - 24660 * (filt << 2) */ 490b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber filt = shl(filt, 2, pOverflow); /* Q15 */ 491b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber result = mult(24660, filt, pOverflow); 492b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber result = sub(16384, result, pOverflow); 493b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 494b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 495b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 496b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 497b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 498b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber result = 0; 499b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 500b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* 501b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * if (prevAlpha == 0.0) result = 0.5 * (result + prevAlpha); 502b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 503b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (st->prev_alpha == 0) 504b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 505b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber result = shr(result, 1, pOverflow); 506b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 507b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 508b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* store the result */ 509b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *alpha = result; 510b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 511b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* update adapter state memory */ 512b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->prev_alpha = result; 513b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->prev_gc = gain_cod; 514b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 515b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber for (i = LTPG_MEM_SIZE - 1; i > 0; i--) 516b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 517b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber st->ltpg_mem[i] = st->ltpg_mem[i-1]; 518b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 519b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* mem[0] is just present for convenience in calling the gmed_n[5] 520b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * function above. The memory depth is really LTPG_MEM_SIZE-1. 521b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 522b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 523