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/d2_9pf.c 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Functions: decode_2i40_9bits 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 01/28/2002 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Modified to place file in the correct template format. Eliminated 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber use of special functions to perform simple mathematical operations, where 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber possible. Added the parameter pOverflow for the basic math operations. 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Per review comments... 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (1) Removed include of basic_op.h, replaced with shl.h 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (2) Added pOverflow to the output section of the template 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added #ifdef __cplusplus around extern'ed table. 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber MODULE DESCRIPTION 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION: decode_2i40_9bits (decod_ACELP()) 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PURPOSE: Algebraic codebook decoder. For details about the encoding see 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber c2_9pf.c 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "d2_9pf.h" 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "basic_op.h" 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*--------------------------------------------------------------------------*/ 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberextern "C" 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; MACROS 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Define module specific macros here 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; DEFINES 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Include all pre-processor statements here. Include conditional 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; compile variables also. 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#define NB_PULSE 2 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; LOCAL FUNCTION DEFINITIONS 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Function Prototype declaration 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; LOCAL VARIABLE DEFINITIONS 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Variable declaration - defined here and used outside this module 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber extern const Word16 startPos[]; 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*--------------------------------------------------------------------------*/ 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: decode_2i40_11bits 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign -- Word16 -- signs of 2 pulses. 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber index -- Word16 -- Positions of the 2 pulses. 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod[] -- array of type Word16 -- algebraic (fixed) codebook excitation 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow = pointer to overflow flag 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber d2_9pf.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid decode_2i40_9bits( 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 subNr, /* i : subframe number */ 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 sign, /* i : signs of 2 pulses. */ 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 index, /* i : Positions of the 2 pulses. */ 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 cod[], /* o : algebraic (fixed) codebook excitation */ 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow /* o : Flag set when overflow occurs */ 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 j; 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 k; 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 pos[NB_PULSE]; 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Decode the positions */ 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* table bit is the MSB */ 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber j = (Word16)(index & 64); 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber j >>= 3; 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = index & 7; 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber k = 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shl( 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber subNr, 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1, 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber k += j; 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* pos0 =i*5+startPos[j*8+subNr*2] */ 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pos[0] = i * 5 + startPos[k++]; 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber index >>= 3; 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = index & 7; 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* pos1 =i*5+startPos[j*8+subNr*2 + 1] */ 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pos[1] = i * 5 + startPos[k]; 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* decode the signs and build the codeword */ 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = L_SUBFR - 1; i >= 0; i--) 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod[i] = 0; 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (j = 0; j < NB_PULSE; j++) 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber i = sign & 0x1; 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* This line is equivalent to... 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * if (i == 1) 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * { 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * cod[pos[j]] = 8191; 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * } 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * if (i == 0) 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * { 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * cod[pos[j]] = -8192; 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * } 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber */ 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cod[pos[j]] = i * 16383 - 8192; 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sign >>= 1; 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 249