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/c_g_aver.c 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Functions: 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Cb_gain_average_reset 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Cb_gain_average 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 03/28/2000 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Made some changes to the comments to match the comments from 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber other modules. 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Made changes based on comments from the review meeting. 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Synchronized file with UMTS version 3.2.0. Updated coding 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber template. 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Made the following changes per comments from Phase 2/3 review: 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1. Defined one local variable per line. 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Removed the functions Cb_gain_average_init and 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Cb_gain_average_exit. The Cb_gain_average related structure is no longer 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber dynamically allocated. 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Passing in pOverflow to comply with changes needed for EPOC 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Updated the include files for the module. 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Changed round function name to pv_round to avoid conflict with 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber round function in C standard library. 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced OSCL mem type functions and eliminated include 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber files that now are chosen by OSCL definitions 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber MODULE DESCRIPTION 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This file contains functions that reset and perform 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber codebook gain calculations. 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include <string.h> 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "c_g_aver.h" 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "mode.h" 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "basic_op.h" 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; DEFINES 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Include all pre-processor statements here. Include conditional 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; compile variables also. 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL VARIABLE DEFINITIONS 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Cb_gain_average_reset 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state = pointer to a structure of type Cb_gain_averageState 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Structure pointed to by state is initialized to zeros 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns 0 if memory was successfully initialized, 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber otherwise returns -1. 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Resets state memory 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber c_g_aver.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberWord16 Cb_gain_average_reset (Cb_gain_averageState *state) 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (state == (Cb_gain_averageState *) NULL){ 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber fprintf(stderr, "Cb_gain_average_reset: invalid parameter\n"); 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return -1; 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Static vectors to zero 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Set_zero (state->cbGainHistory, L_CBGAINHIST); 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Initialize hangover handling 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->hangVar = 0; 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->hangCount= 0; 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return 0; 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberWord16 Cb_gain_average_reset(Cb_gain_averageState *state) 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (state == (Cb_gain_averageState *) NULL) 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* fprint(stderr, "Cb_gain_average_reset: invalid parameter\n"); */ 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return(-1); 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Static vectors to zero */ 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber memset(state->cbGainHistory, 0, L_CBGAINHIST*sizeof(Word16)); 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Initialize hangover handling */ 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->hangVar = 0; 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->hangCount = 0; 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return(0); 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/****************************************************************************/ 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Cb_gain_average 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st = pointer to structure of type Cb_gain_averageState 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber mode = AMR mode (enum Mode) 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber gain_code = CB gain (Word16) 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp = the LSP for the current frame (Word16) 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lspAver = the average of LSP for 8 frames (Word16) 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bfi = bad frame indication flag (Word16) 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber prev_bf = previous bad frame indication flag (Word16) 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pdfi = potential degraded bad frame ind flag (Word16) 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber prev_pdf = prev pot. degraded bad frame ind flag (Word16) 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber inBackgroundNoise = background noise decision (Word16) 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber voicedHangover = # of frames after last voiced frame (Word16) 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow = address of overflow (Flag) 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMix = codebook gain (Word16) 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber The mix cb gains for MR475, MR515, MR59, MR67, MR102; gain_code other modes 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None. 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber c_g_aver.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberWord16 Cb_gain_average ( 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Cb_gain_averageState *st, // i/o : State variables for CB gain avergeing 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber enum Mode mode, // i : AMR mode 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 gain_code, // i : CB gain Q1 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp[], // i : The LSP for the current frame Q15 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lspAver[], // i : The average of LSP for 8 frames Q15 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 bfi, // i : bad frame indication flag 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 prev_bf, // i : previous bad frame indication flag 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 pdfi, // i : potential degraded bad frame ind flag 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 prev_pdf, // i : prev pot. degraded bad frame ind flag 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 inBackgroundNoise, // i : background noise decision 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 voicedHangover // i : # of frames after last voiced frame 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ) 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber //---------------------------------------------------------* 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Compute mixed cb gain, used to make cb gain more * 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * smooth in background noise for modes 5.15, 5.9 and 6.7 * 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * states that needs to be updated by all * 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *--------------------------------------------------------- 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 cbGainMix, diff, tmp_diff, bgMix, cbGainMean; 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 L_sum; 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 tmp[M], tmp1, tmp2, shift1, shift2, shift; 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // set correct cbGainMix for MR74, MR795, MR122 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMix = gain_code; 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *-------------------------------------------------------* 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Store list of CB gain needed in the CB gain * 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * averaging * 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *-------------------------------------------------------* 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < (L_CBGAINHIST-1); i++) 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->cbGainHistory[i] = st->cbGainHistory[i+1]; 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->cbGainHistory[L_CBGAINHIST-1] = gain_code; 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // compute lsp difference 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) { 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = abs_s(sub(lspAver[i], lsp[i])); // Q15 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shift1 = sub(norm_s(tmp1), 1); // Qn 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = shl(tmp1, shift1); // Q15+Qn 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shift2 = norm_s(lspAver[i]); // Qm 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp2 = shl(lspAver[i], shift2); // Q15+Qm 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp[i] = div_s(tmp1, tmp2); // Q15+(Q15+Qn)-(Q15+Qm) 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shift = sub(add(2, shift1), shift2); 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (shift >= 0) 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp[i] = shr(tmp[i], shift); // Q15+Qn-Qm-Qx=Q13 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp[i] = shl(tmp[i], negate(shift)); // Q15+Qn-Qm-Qx=Q13 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber diff = tmp[0]; 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 1; i < M; i++) { 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber diff = add(diff, tmp[i]); // Q13 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Compute hangover 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (sub(diff, 5325) > 0) // 0.65 in Q11 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangVar = add(st->hangVar, 1); 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangVar = 0; 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (sub(st->hangVar, 10) > 0) 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangCount = 0; // Speech period, reset hangover variable 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Compute mix constant (bgMix) 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = 8192; // 1 in Q13 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((sub(mode, MR67) <= 0) || (sub(mode, MR102) == 0)) 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // MR475, MR515, MR59, MR67, MR102 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // if errors and presumed noise make smoothing probability stronger 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((((pdfi != 0) && (prev_pdf != 0)) || (bfi != 0) || (prev_bf != 0)) && 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (sub(voicedHangover, 1) > 0) && (inBackgroundNoise != 0) && 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ((sub(mode, MR475) == 0) || 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (sub(mode, MR515) == 0) || 3504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (sub(mode, MR59) == 0)) )) 3514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // bgMix = min(0.25, max(0.0, diff-0.55)) / 0.25; 3534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp_diff = sub(diff, 4506); // 0.55 in Q13 3544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // max(0.0, diff-0.55) 3564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (tmp_diff > 0) 3574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = tmp_diff; 3594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = 0; 3634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // min(0.25, tmp1) 3664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (sub(2048, tmp1) < 0) 3674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = 8192; 3694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = shl(tmp1, 2); 3734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // bgMix = min(0.25, max(0.0, diff-0.40)) / 0.25; 3784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp_diff = sub(diff, 3277); // 0.4 in Q13 3794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // max(0.0, diff-0.40) 3814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (tmp_diff > 0) 3824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = tmp_diff; 3844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = 0; 3884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // min(0.25, tmp1) 3914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (sub(2048, tmp1) < 0) 3924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = 8192; 3944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 3964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = shl(tmp1, 2); 3984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((sub(st->hangCount, 40) < 0) || (sub(diff, 5325) > 0)) // 0.65 in Q13 4024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = 8192; // disable mix if too short time since 4044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // Smoothen the cb gain trajectory 4074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // smoothing depends on mix constant bgMix 4084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mult(6554, st->cbGainHistory[2]); // 0.2 in Q15; L_sum in Q17 4094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 3; i < L_CBGAINHIST; i++) 4104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mac(L_sum, 6554, st->cbGainHistory[i]); 4124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMean = pv_round(L_sum); // Q1 4144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // more smoothing in error and bg noise (NB no DFI used here) 4164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((bfi != 0) || (prev_bf != 0)) && (inBackgroundNoise != 0) && 4174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ((sub(mode, MR475) == 0) || 4184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (sub(mode, MR515) == 0) || 4194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (sub(mode, MR59) == 0)) ) 4204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mult(4681, st->cbGainHistory[0]); // 0.143 in Q15; L_sum in Q17 4224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 1; i < L_CBGAINHIST; i++) 4234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mac(L_sum, 4681, st->cbGainHistory[i]); 4254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMean = pv_round(L_sum); // Q1 4274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // cbGainMix = bgMix*cbGainMix + (1-bgMix)*cbGainMean; 4304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mult(bgMix, cbGainMix); // L_sum in Q15 4314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mac(L_sum, 8192, cbGainMean); 4324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_msu(L_sum, bgMix, cbGainMean); 4334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMix = pv_round(L_shl(L_sum, 2)); // Q1 4344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangCount = add(st->hangCount, 1); 4374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return cbGainMix; 4384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 4394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 4424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 4444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 4454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 4474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 4494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 4514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 4524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 4534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 4544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 4554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 4584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 4594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 4624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberWord16 Cb_gain_average( 4644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Cb_gain_averageState *st, /* i/o : State variables for CB gain averaging */ 4654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber enum Mode mode, /* i : AMR mode */ 4664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 gain_code, /* i : CB gain Q1 */ 4674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp[], /* i : The LSP for the current frame Q15 */ 4684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lspAver[], /* i : The average of LSP for 8 frames Q15 */ 4694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 bfi, /* i : bad frame indication flag */ 4704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 prev_bf, /* i : previous bad frame indication flag */ 4714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 pdfi, /* i : potential degraded bad frame ind flag */ 4724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 prev_pdf, /* i : prev pot. degraded bad frame ind flag */ 4734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 inBackgroundNoise, /* i : background noise decision */ 4744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 voicedHangover, /* i : # of frames after last voiced frame */ 4754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 4764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 4774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 4784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 4794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 cbGainMix; 4804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 diff; 4814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 tmp_diff; 4824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 bgMix; 4834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 cbGainMean; 4844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 L_sum; 4854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 tmp[M]; 4864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 tmp1; 4874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 tmp2; 4884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 shift1; 4894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 shift2; 4904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 shift; 4914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*---------------------------------------------------------* 4934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Compute mixed cb gain, used to make cb gain more * 4944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * smooth in background noise for modes 5.15, 5.9 and 6.7 * 4954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * states that needs to be updated by all * 4964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *---------------------------------------------------------*/ 4974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* set correct cbGainMix for MR74, MR795, MR122 */ 4994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMix = gain_code; 5004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /*-------------------------------------------------------* 5024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * Store list of CB gain needed in the CB gain * 5034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber * averaging * 5044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *-------------------------------------------------------*/ 5054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < (L_CBGAINHIST - 1); i++) 5064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->cbGainHistory[i] = st->cbGainHistory[i+1]; 5084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->cbGainHistory[L_CBGAINHIST-1] = gain_code; 5104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber diff = 0; 5124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* compute lsp difference */ 5144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) 5154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = abs_s(sub(*(lspAver + i), *(lsp + i), pOverflow)); 5174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Q15 */ 5184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shift1 = sub(norm_s(tmp1), 1, pOverflow); /* Qn */ 5194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = shl(tmp1, shift1, pOverflow); /* Q15+Qn */ 5204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shift2 = norm_s(*(lspAver + i)); /* Qm */ 5214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp2 = shl(*(lspAver + i), shift2, pOverflow); /* Q15+Qm */ 5224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp[i] = div_s(tmp1, tmp2); /* Q15+(Q15+Qn)-(Q15+Qm) */ 5234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber shift = 2 + shift1 - shift2; 5254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (shift >= 0) 5274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(tmp + i) = shr(*(tmp + i), shift, pOverflow); 5294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Q15+Qn-Qm-Qx=Q13 */ 5304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 5324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(tmp + i) = shl(*(tmp + i), negate(shift), pOverflow); 5344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Q15+Qn-Qm-Qx=Q13 */ 5354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber diff = add(diff, *(tmp + i), pOverflow); /* Q13 */ 5384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Compute hangover */ 5414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (diff > 5325) /* 0.65 in Q11 */ 5434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangVar += 1; 5454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 5474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangVar = 0; 5494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (st->hangVar > 10) 5534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Speech period, reset hangover variable */ 5554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangCount = 0; 5564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Compute mix constant (bgMix) */ 5594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = 8192; /* 1 in Q13 */ 5604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((mode <= MR67) || (mode == MR102)) 5624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* MR475, MR515, MR59, MR67, MR102 */ 5634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* if errors and presumed noise make smoothing probability stronger */ 5654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((((pdfi != 0) && (prev_pdf != 0)) || (bfi != 0) || 5674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (prev_bf != 0)) 5684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber && (voicedHangover > 1) 5694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber && (inBackgroundNoise != 0) 5704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber && ((mode == MR475) || (mode == MR515) || 5714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (mode == MR59)))) 5724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* bgMix = min(0.25, max(0.0, diff-0.55)) / 0.25; */ 5744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp_diff = sub(diff, 4506, pOverflow); /* 0.55 in Q13 */ 5754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 5774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* bgMix = min(0.25, max(0.0, diff-0.40)) / 0.25; */ 5794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp_diff = sub(diff, 3277, pOverflow); /* 0.4 in Q13 */ 5804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* max(0.0, diff-0.55) or */ 5834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* max(0.0, diff-0.40) */ 5844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (tmp_diff > 0) 5854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = tmp_diff; 5874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 5894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber tmp1 = 0; 5914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* min(0.25, tmp1) */ 5944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (2048 < tmp1) 5954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = 8192; 5974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else 5994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 6004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = shl(tmp1, 2, pOverflow); 6014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if ((st->hangCount < 40) || (diff > 5325)) /* 0.65 in Q13 */ 6044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 6054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* disable mix if too short time since */ 6064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber bgMix = 8192; 6074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Smoothen the cb gain trajectory */ 6104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* smoothing depends on mix constant bgMix */ 6114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mult(6554, st->cbGainHistory[2], pOverflow); 6124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 0.2 in Q15; L_sum in Q17 */ 6134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 3; i < L_CBGAINHIST; i++) 6154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 6164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mac(L_sum, 6554, st->cbGainHistory[i], pOverflow); 6174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMean = pv_round(L_sum, pOverflow); /* Q1 */ 6194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* more smoothing in error and bg noise (NB no DFI used here) */ 6214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (((bfi != 0) || (prev_bf != 0)) && (inBackgroundNoise != 0) 6234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber && ((mode == MR475) || (mode == MR515) 6244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber || (mode == MR59))) 6254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 6264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* 0.143 in Q15; L_sum in Q17 */ 6274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mult(4681, st->cbGainHistory[0], pOverflow); 6284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 1; i < L_CBGAINHIST; i++) 6294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 6304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = 6314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_mac(L_sum, 4681, st->cbGainHistory[i], pOverflow); 6324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMean = pv_round(L_sum, pOverflow); /* Q1 */ 6344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* cbGainMix = bgMix*cbGainMix + (1-bgMix)*cbGainMean; */ 6374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* L_sum in Q15 */ 6384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mult(bgMix, cbGainMix, pOverflow); 6394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_mac(L_sum, 8192, cbGainMean, pOverflow); 6404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_sum = L_msu(L_sum, bgMix, cbGainMean, pOverflow); 6414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cbGainMix = pv_round(L_shl(L_sum, 2, pOverflow), pOverflow); /* Q1 */ 6424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->hangCount += 1; 6454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return (cbGainMix); 6474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 6484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 649