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/q_gain_p.c 35b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Functions: q_gain_pitch 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 "int" and/or "char" with OSCL defined types. 46b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 47b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Added #ifdef __cplusplus around extern'ed table. 48b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 49b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: 50b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 51b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 52b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber MODULE DESCRIPTION 53b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 54b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 55b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 56b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 57b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 58b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 59b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; INCLUDES 60b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 61b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "q_gain_p.h" 62b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "typedef.h" 63b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "oper_32b.h" 64b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "cnst.h" 65b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "basic_op.h" 66b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 67b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 68b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*--------------------------------------------------------------------------*/ 69b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#ifdef __cplusplus 70b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huberextern "C" 71b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 72b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#endif 73b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 74b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 75b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; MACROS 76b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Define module specific macros here 77b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 78b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 79b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 80b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; DEFINES 81b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Include all pre-processor statements here. Include conditional 82b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; compile variables also. 83b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 84b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#define NB_QUA_PITCH 16 85b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 86b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 87b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; LOCAL FUNCTION DEFINITIONS 88b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Function Prototype declaration 89b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 90b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 91b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 92b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; LOCAL VARIABLE DEFINITIONS 93b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Variable declaration - defined here and used outside this module 94b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 95b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 96b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 97b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 98b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Declare variables used in this module but defined elsewhere 99b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 100b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber extern const Word16 qua_gain_pitch[NB_QUA_PITCH]; 101b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 102b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*--------------------------------------------------------------------------*/ 103b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#ifdef __cplusplus 104b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 105b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#endif 106b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 107b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 108b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 109b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: q_gain_pitch 110b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 111b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 112b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 113b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 114b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber mode -- enum Mode -- AMR mode 115b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gp_limit -- Word16 -- pitch gain limit 116b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain -- Pointer to Word16 -- Pitch gain (unquant/quant), Q14 117b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 118b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 119b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain -- Pointer to Word16 -- Pitch gain (unquant/quant), Q14 120b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 121b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain_cand -- Array of type Word16 -- pitch gain candidates (3), 122b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber MR795 only, Q14 123b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 124b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain_cind -- Array of type Word16 -- pitch gain cand. indices (3), 125b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber MR795 only, Q0 126b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 127b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pOverflow -- Pointer to Flag -- overflow indicator 128b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 129b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 130b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 -- index of quantization 131b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 132b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 133b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber qua_gain_pitch 134b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 135b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 136b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 137b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 138b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 139b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 140b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 141b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 142b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 143b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 144b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 145b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 146b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 147b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 148b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 149b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 150b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber q_gain_p.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 151b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 152b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 153b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 154b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 155b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 156b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 157b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 158b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 159b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 160b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 161b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 162b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 163b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 164b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 165b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 166b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 167b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 168b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 169b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 170b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 171b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 172b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 173b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 174b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 175b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 176b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 177b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 178b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 179b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberWord16 q_gain_pitch( /* Return index of quantization */ 180b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber enum Mode mode, /* i : AMR mode */ 181b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 gp_limit, /* i : pitch gain limit */ 182b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 *gain, /* i/o: Pitch gain (unquant/quant), Q14 */ 183b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 gain_cand[], /* o : pitch gain candidates (3), MR795 only, Q14 */ 184b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 gain_cind[], /* o : pitch gain cand. indices (3),MR795 only, Q0 */ 185b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Flag *pOverflow 186b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber) 187b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 188b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 i; 189b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 index; 190b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 err; 191b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 err_min; 192b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 193b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err_min = sub(*gain, qua_gain_pitch[0], pOverflow); 194b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err_min = abs_s(err_min); 195b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 196b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = 0; 197b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 198b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber for (i = 1; i < NB_QUA_PITCH; i++) 199b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 200b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (qua_gain_pitch[i] <= gp_limit) 201b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 202b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err = sub(*gain, qua_gain_pitch[i], pOverflow); 203b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err = abs_s(err); 204b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 205b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (err < err_min) 206b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 207b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err_min = err; 208b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = i; 209b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 210b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 211b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 212b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 213b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (mode == MR795) 214b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 215b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* in MR795 mode, compute three gain_pit candidates around the index 216b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * found in the quantization loop: the index found and the two direct 217b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * neighbours, except for the extreme cases (i=0 or i=NB_QUA_PITCH-1), 218b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * where the direct neighbour and the neighbour to that is used. 219b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 220b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 ii; 221b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 222b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (index == 0) 223b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 224b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ii = index; 225b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 226b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 227b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 228b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (index == (NB_QUA_PITCH - 1) || 229b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber (qua_gain_pitch[index+1] > gp_limit)) 230b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 231b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ii = index - 2; 232b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 233b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 234b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 235b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ii = index - 1; 236b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 237b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 238b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 239b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* store candidate indices and values */ 240b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber for (i = 0; i < 3; i++) 241b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 242b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain_cind[i] = ii; 243b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain_cand[i] = qua_gain_pitch[ii]; 244b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 245b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ii = add(ii, 1, pOverflow); 246b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 247b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 248b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *gain = qua_gain_pitch[index]; 249b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 250b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 251b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 252b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* in MR122 mode, just return the index and gain pitch found. 253b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * If bitexactness is required, mask away the two LSBs (because 254b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * in the original EFR, gain_pit was scaled Q12) 255b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 256b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (mode == MR122) 257b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 258b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* clear 2 LSBits */ 259b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *gain = qua_gain_pitch[index] & 0xFFFC; 260b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 261b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 262b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 263b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *gain = qua_gain_pitch[index]; 264b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 265b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 266b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return index; 267b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 268