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/enc_lag6.c 35b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Functions: 36b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 37b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Date: 02/05/2002 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: 46b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber (1) Removed optimization -- mult(i, 6, pOverflow) is NOT the same as adding 47b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber i to itself 6 times. The reason is because the mult function does a 48b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber right shift by 15, which will obliterate smaller numbers. 49b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 50b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 51b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 52b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: 53b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 54b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 55b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber MODULE DESCRIPTION 56b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 57b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 58b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 59b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 60b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 61b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 62b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; INCLUDES 63b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 64b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "enc_lag6.h" 65b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "typedef.h" 66b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "basic_op.h" 67b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 68b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 69b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; MACROS 70b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Define module specific macros here 71b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 72b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 73b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 74b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; DEFINES 75b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Include all pre-processor statements here. Include conditional 76b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; compile variables also. 77b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 78b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 79b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 80b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL FUNCTION DEFINITIONS 81b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Function Prototype declaration 82b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 83b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 84b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 85b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL VARIABLE DEFINITIONS 86b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; Variable declaration - defined here and used outside this module 87b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 88b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 89b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 90b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 91b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 92b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: Enc_lag6 93b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 94b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 95b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 96b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 97b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber T0 -- Word16 -- Pitch delay 98b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber T0_frac -- Word16 -- Fractional pitch delay 99b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber T0_min -- Word16 -- minimum of search range 100b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber delta_flag -- Word16 -- Flag for 1st (or 3rd) subframe 101b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 102b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 103b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pOverflow -- Pointer to Flag -- overflow indicator 104b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 105b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 106b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 -- Return index of encoding 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 PURPOSE: Encoding of fractional pitch lag with 1/6 resolution. 118b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 119b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber DESCRIPTION: 120b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber First and third subframes: 121b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber -------------------------- 122b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber The pitch range is divided as follows: 123b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 17 3/6 to 94 3/6 resolution 1/6 124b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 95 to 143 resolution 1 125b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 126b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber The period is encoded with 9 bits. 127b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber For the range with fractions: 128b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = (T-17)*6 + frac - 3; 129b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where T=[17..94] and frac=[-2,-1,0,1,2,3] 130b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber and for the integer only range 131b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = (T - 95) + 463; where T=[95..143] 132b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 133b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Second and fourth subframes: 134b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ---------------------------- 135b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber For the 2nd and 4th subframes a resolution of 1/6 is always used, 136b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber and the search range is relative to the lag in previous subframe. 137b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber If t0 is the lag in the previous subframe then 138b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber t_min=t0-5 and t_max=t0+4 and the range is given by 139b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber (t_min-1) 3/6 to (t_max) 3/6 140b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 141b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber The period in the 2nd (and 4th) subframe is encoded with 6 bits: 142b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = (T-(t_min-1))*6 + frac - 3; 143b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where T=[t_min-1..t_max] and frac=[-2,-1,0,1,2,3] 144b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 145b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Note that only 61 values are used. If the decoder receives 61, 62, 146b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber or 63 as the relative pitch index, it means that a transmission 147b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber error occurred and the pitch from previous subframe should be used. 148b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 149b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 150b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 151b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 152b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 153b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 154b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 155b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 156b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 157b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber enc_lag6.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 158b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 159b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 160b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 161b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 162b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 163b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 164b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 165b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 166b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 167b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 168b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 169b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 170b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 171b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 172b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 173b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 174b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 175b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 176b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 177b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 178b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 179b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 180b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 181b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 182b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 183b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 184b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 185b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 186b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberWord16 Enc_lag6( /* o : Return index of encoding */ 187b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 T0, /* i : Pitch delay */ 188b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 T0_frac, /* i : Fractional pitch delay */ 189b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 T0_min, /* i : minimum of search range */ 190b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 delta_flag, /* i : Flag for 1st (or 3rd) subframe */ 191b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Flag *pOverflow /* o : overflow indicator */ 192b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber) 193b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 194b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 index; 195b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 i; 196b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 temp; 197b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 198b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (delta_flag == 0) /* if 1st or 3rd subframe */ 199b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 200b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* encode pitch delay (with fraction) */ 201b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (T0 <= 94) 202b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 203b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* index = T0*6 - 105 + T0_frac */ 204b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber i = 6 * T0 - 105; 205b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 206b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = add(i, T0_frac, pOverflow); 207b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 208b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 209b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 210b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = add(T0, 368, pOverflow); 211b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 212b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 213b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 214b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 215b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* if second or fourth subframe */ 216b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 217b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* index = 6*(T0-T0_min) + 3 + T0_frac */ 218b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber temp = sub(T0, T0_min, pOverflow); 219b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 220b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber i = add(temp, temp, pOverflow); 221b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber i = add(temp, i, pOverflow); 222b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber i = add(i, i, pOverflow); 223b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 224b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber i = add(i, 3, pOverflow); 225b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 226b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = add(i, T0_frac, pOverflow); 227b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 228b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 229b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return index; 230b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 231