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/d_gain_c.c 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Functions: d_gain_c 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 01/29/2002 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Updated include files and intput/output section. Changed .tab 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber files to .c files. 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced OSCL mem type functions and eliminated include 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber files that now are chosen by OSCL definitions 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added #ifdef __cplusplus around extern'ed table. 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ------------------------------------------------------------------------------ 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pred_state = pointer to sturcture type gc_predState. MA predictor state 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = AMR mode (MR795 or MR122) of type enum Mode 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber index = received quantization index of type Word16 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber code[] = pointer to innovation codevector of type Word16 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow= pointer to value indicating existence of overflow (Flag) 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pred_state = pointer to sturcture type gc_predState. MA predictor state 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gain_code = pointer to decoded innovation gain of type Word16 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow = 1 if there is an overflow else it is zero. 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Function : d_gain_code 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Purpose : Decode the fixed codebook gain using the received index. 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber d_gain_c.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK USAGE: [stack count for this module] + [variable to represent 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber stack usage for each subroutine called] 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: [stack usage variable] = stack usage for [subroutine 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] (see [filename].ext) 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber DATA MEMORY USED: x words 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PROGRAM MEMORY USED: x words 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: [cycle count equation for this module] + [variable 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called] 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: [cycle count variable] = cycle count for [subroutine 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] (see [filename].ext) 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "d_gain_c.h" 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "mode.h" 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "oper_32b.h" 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "log2.h" 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "pow2.h" 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "gc_pred.h" 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "basic_op.h" 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*--------------------------------------------------------------------------*/ 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberextern "C" 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; MACROS 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Define module specific macros here 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; DEFINES 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Include all pre-processor statements here. Include conditional 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; compile variables also. 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; LOCAL FUNCTION DEFINITIONS 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Function Prototype declaration 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Variable declaration - defined here and used outside this module 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; EXTERNAL FUNCTION REFERENCES 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Declare functions defined elsewhere and referenced in this module 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------------------------- 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ; Declare variables used in this module but defined elsewhere 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ----------------------------------------------------------------------------*/ 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber extern const Word16 qua_gain_code[]; 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*--------------------------------------------------------------------------*/ 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#ifdef __cplusplus 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#endif 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; FUNCTION CODE 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid d_gain_code( 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gc_predState *pred_state, /* i/o : MA predictor state */ 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber enum Mode mode, /* i : AMR mode (MR795 or MR122) */ 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 index, /* i : received quantization index */ 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 code[], /* i : innovation codevector */ 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *gain_code, /* o : decoded innovation gain */ 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 gcode0, exp, frac; 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber const Word16 *p; 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 qua_ener_MR122, qua_ener; 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 exp_inn_en; 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 frac_inn_en; 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 L_tmp; 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 tbl_tmp; 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 temp; 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*-------------- Decode codebook gain ---------------*/ 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*-------------------------------------------------------------------* 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * predict codebook gain * 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ~~~~~~~~~~~~~~~~~~~~~ * 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * gc0 = Pow2(int(d)+frac(d)) * 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * = 2^exp + 2^frac * 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * * 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *-------------------------------------------------------------------*/ 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gc_pred(pred_state, mode, code, &exp, &frac, 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber &exp_inn_en, &frac_inn_en, pOverflow); 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber index &= 31; /* index < 32, to avoid buffer overflow */ 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tbl_tmp = index + (index << 1); 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber p = &qua_gain_code[tbl_tmp]; 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Different scalings between MR122 and the other modes */ 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = sub((Word16)mode, (Word16)MR122, pOverflow); 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (temp == 0) 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gcode0 = (Word16)(Pow2(exp, frac, pOverflow)); /* predicted gain */ 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gcode0 = shl(gcode0, 4, pOverflow); 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *gain_code = shl(mult(gcode0, *p++, pOverflow), 1, pOverflow); 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gcode0 = (Word16)(Pow2(14, frac, pOverflow)); 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_mult(*p++, gcode0, pOverflow); 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_shr(L_tmp, sub(9, exp, pOverflow), pOverflow); 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *gain_code = extract_h(L_tmp); /* Q1 */ 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*-------------------------------------------------------------------* 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * update table of past quantized energies * 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *-------------------------------------------------------------------*/ 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber qua_ener_MR122 = *p++; 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber qua_ener = *p++; 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gc_pred_update(pred_state, qua_ener_MR122, qua_ener); 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 255