q_gain_c.cpp revision b841f14f8e51f2365945281fbfa54ef6a1b1b5a6
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_c.c 35b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Functions: q_gain_code 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, 3, pOverflow) is NOT the same as adding 47b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber i to itself 3 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: 51b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 1. Eliminated unused include files. 52b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 2. Eliminated math operations that unnecessary checked for 53b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber saturation by evaluating the operands 54b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 55b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 56b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 57b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Added #ifdef __cplusplus around extern'ed table. 58b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 59b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: 60b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 61b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 62b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber MODULE DESCRIPTION 63b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 64b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Scalar quantization of the innovative codebook gain. 65b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 66b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 67b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 68b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 69b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 70b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; INCLUDES 71b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 72b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "q_gain_c.h" 73b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "mode.h" 74b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "oper_32b.h" 75b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "basic_op.h" 76b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "log2.h" 77b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "pow2.h" 78b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 79b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*--------------------------------------------------------------------------*/ 80b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#ifdef __cplusplus 81b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huberextern "C" 82b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 83b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#endif 84b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 85b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 86b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; MACROS 87b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Define module specific macros here 88b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 89b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 90b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 91b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; DEFINES 92b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Include all pre-processor statements here. Include conditional 93b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; compile variables also. 94b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 95b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#define NB_QUA_CODE 32 96b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 97b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 98b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; LOCAL FUNCTION DEFINITIONS 99b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Function Prototype declaration 100b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 101b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 102b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 103b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; LOCAL VARIABLE DEFINITIONS 104b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Variable declaration - defined here and used outside this module 105b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 106b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 107b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*---------------------------------------------------------------------------- 108b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 109b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ; Declare variables used in this module but defined elsewhere 110b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ----------------------------------------------------------------------------*/ 111b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber extern const Word16 qua_gain_code[NB_QUA_CODE*3]; 112b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 113b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*--------------------------------------------------------------------------*/ 114b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#ifdef __cplusplus 115b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 116b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#endif 117b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 118b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 119b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 120b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: q_gain_code 121b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 122b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 123b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 124b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 125b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber mode -- enum Mode -- AMR mode 126b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber exp_gcode0 -- Word16 -- predicted CB gain (exponent), Q0 127b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber frac_gcode0 -- Word16 -- predicted CB gain (fraction), Q15 128b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain -- Pointer to Word16 -- quantized fixed codebook gain, Q1 129b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 130b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 131b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gain -- Pointer to Word16 -- quantized fixed codebook gain, Q1 132b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 133b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber qua_ener_MR122 -- Pointer to Word16 -- quantized energy error, Q10 134b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber (for MR122 MA predictor update) 135b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 136b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber qua_ener -- Pointer to Word16 -- quantized energy error, Q10 137b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber (for other MA predictor update) 138b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 139b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pOverflow -- Pointer to Flag -- overflow indicator 140b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 141b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber quantization index -- Word16 -- Q0 142b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 143b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 144b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber qua_gain_code[] 145b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 146b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 147b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 148b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 149b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 150b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 151b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 152b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Scalar quantization of the innovative codebook gain. 153b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 154b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 155b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 156b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 157b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 158b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 159b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 160b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 161b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 162b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber q_gain_c.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 163b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 164b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 165b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 166b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 167b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 168b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 169b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 170b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 171b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 172b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 173b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 174b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 175b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 176b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 177b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 178b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 179b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 180b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 181b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 182b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 183b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 184b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 185b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 186b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 187b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 188b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 189b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 190b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 191b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberWord16 q_gain_code( /* o : quantization index, Q0 */ 192b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber enum Mode mode, /* i : AMR mode */ 193b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 exp_gcode0, /* i : predicted CB gain (exponent), Q0 */ 194b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 frac_gcode0, /* i : predicted CB gain (fraction), Q15 */ 195b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 *gain, /* i/o: quantized fixed codebook gain, Q1 */ 196b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 *qua_ener_MR122, /* o : quantized energy error, Q10 */ 197b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* (for MR122 MA predictor update) */ 198b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 *qua_ener, /* o : quantized energy error, Q10 */ 199b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* (for other MA predictor update) */ 200b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Flag *pOverflow 201b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber) 202b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 203b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber const Word16 *p; 204b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 i; 205b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 index; 206b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 gcode0; 207b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 err; 208b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 err_min; 209b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 g_q0; 210b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 temp; 211b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 212b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (mode == MR122) 213b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 214b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber g_q0 = *gain >> 1; /* Q1 -> Q0 */ 215b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 216b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 217b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 218b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber g_q0 = *gain; 219b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 220b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 221b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*-------------------------------------------------------------------* 222b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * predicted codebook gain * 223b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * ~~~~~~~~~~~~~~~~~~~~~~~ * 224b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * gc0 = Pow2(int(d)+frac(d)) * 225b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * = 2^exp + 2^frac * 226b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * * 227b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *-------------------------------------------------------------------*/ 228b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 229b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gcode0 = (Word16) Pow2(exp_gcode0, frac_gcode0, pOverflow); /* predicted gain */ 230b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 231b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (mode == MR122) 232b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 233b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gcode0 = shl(gcode0, 4, pOverflow); 234b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 235b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 236b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 237b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber gcode0 = shl(gcode0, 5, pOverflow); 238b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 239b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 240b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /*-------------------------------------------------------------------* 241b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * Search for best quantizer * 242b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *-------------------------------------------------------------------*/ 243b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 244b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber p = &qua_gain_code[0]; 245b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err_min = ((Word32)gcode0 * *(p++)) >> 15; 246b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err_min = g_q0 - err_min; 247b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (err_min < 0) 248b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 249b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err_min = -err_min; 250b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 251b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 252b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber p += 2; /* skip quantized energy errors */ 253b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = 0; 254b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 255b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber for (i = 1; i < NB_QUA_CODE; i++) 256b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 257b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err = ((Word32)gcode0 * *(p++)) >> 15; 258b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err = g_q0 - err; 259b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 260b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (err < 0) 261b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 262b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err = -err; 263b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 264b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 265b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber p += 2; /* skip quantized energy error */ 266b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 267b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (err < err_min) 268b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 269b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber err_min = err; 270b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber index = i; 271b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 272b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 273b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 274b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber temp = index + (index << 1); 275b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 276b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber p = &qua_gain_code[temp]; 277b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 278b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber temp = (gcode0 * *(p++)) >> 15; 279b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber if (mode == MR122) 280b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 281b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *gain = temp << 1; 282b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 283b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber else 284b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber { 285b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *gain = temp; 286b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber } 287b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 288b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber /* quantized error energies (for MA predictor update) */ 289b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *qua_ener_MR122 = *p++; 290b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *qua_ener = *p; 291b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 292b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return index; 293b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 294