14f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* ------------------------------------------------------------------ 24f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Copyright (C) 1998-2009 PacketVideo 34f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 44f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 54f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * you may not use this file except in compliance with the License. 64f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * You may obtain a copy of the License at 74f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 84f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 94f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Unless required by applicable law or agreed to in writing, software 114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * express or implied. 144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * See the License for the specific language governing permissions 154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * and limitations under the License. 164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ------------------------------------------------------------------- 174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/**************************************************************************************** 194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPortions of this file are derived from the following 3GPP standard: 204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3GPP TS 26.073 224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Available from http://www.3gpp.org 244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberPermission to distribute, modify and use this file under the standard license 274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberterms listed above has been obtained from the copyright holder. 284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber****************************************************************************************/ 294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Pathname: ./audio/gsm-amr/c/src/d1035pf.c 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 04/14/2000 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Updated template used to PV coding template. First attempt at 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber optimizing C code. 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Updated file per comments gathered from Phase 2/3 review. 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Synchronized file with UTMS version 3.2.0. Updated coding 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber template. Removed unnecessary include files. 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Removed inclusion of "gray.tab". 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "d1035pf.h" 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "basic_op.h" 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; DEFINES 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Include all pre-processor statements here. Include conditional 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; compile variables also. 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define NB_PULSE 10 /* number of pulses */ 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: dec_10i40_35bits 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber index = buffer containing index of 10 pulses; each element is 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber represented by sign+position 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod = buffer of algebraic (fixed) codebook excitation 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod buffer contains the new algebraic codebook excitation 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber dgray = gray decoding table 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This function builds the innovative codevector from the received index of 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber algebraic codebook. See c1035pf.c for more details about the algebraic 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber codebook structure. 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber d1035pf.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid dec_10i40_35bits ( 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 index[], // (i) : index of 10 pulses (sign+position) 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 cod[] // (o) : algebraic (fixed) codebook excitation 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i, j, pos1, pos2, sign, tmp; 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < L_CODE; i++) 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod[i] = 0; 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // decode the positions and signs of pulses and build the codeword 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (j = 0; j < NB_TRACK; j++) 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // compute index i 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = index[j]; 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = tmp & 7; 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = dgray[i]; 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = extract_l (L_shr (L_mult (i, 5), 1)); 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pos1 = add (i, j); // position of pulse "j" 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = shr (tmp, 3) & 1; 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (i == 0) 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign = 4096; // +1.0 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign = -4096; // -1.0 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod[pos1] = sign; 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // compute index i 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = index[add (j, 5)] & 7; 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = dgray[i]; 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = extract_l (L_shr (L_mult (i, 5), 1)); 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pos2 = add (i, j); // position of pulse "j+5" 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (sub (pos2, pos1) < 0) 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign = negate (sign); 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod[pos2] = add (cod[pos2], sign); 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid dec_10i40_35bits( 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 index[], /* (i) : index of 10 pulses (sign+position) */ 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 cod[] /* (o) : algebraic (fixed) codebook excitation */ 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 2122d0ac425564ff9882ebaac5267d1a04d4af67d00Bernhard Rosenkränzer Word16 i, j, pos1, pos2; 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 sign, tmp; 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < L_CODE; i++) 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(cod + i) = 0; 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* decode the positions and signs of pulses and build the codeword */ 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (j = 0; j < NB_TRACK; j++) 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* compute index i */ 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp = *(index + j); 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = tmp & 7; 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = *(dgray + i); 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = (Word16)(i * 5); 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pos1 = i + j; /* position of pulse "j" */ 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = (tmp >> 3) & 1; 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (i == 0) 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign = 4096; /* +1.0 */ 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign = -4096; /* -1.0 */ 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(cod + pos1) = sign; 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* compute index i */ 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = *(index + j + 5) & 7; 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = *(dgray + i); 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = (Word16)(i * 5); 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pos2 = i + j; /* position of pulse "j+5" */ 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (pos2 < pos1) 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign = negate(sign); 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(cod + pos2) += sign; 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 264