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/post_pro.c 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Functions: 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Post_Process_reset 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Post_Process 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Date: 04/03/2000 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Updated template used to PV coding template. First attempt at 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber optimizing C code. 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Deleted variables listed in the Local Stores Needed/Modified 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sections. Optimized the "else" portion of the first "if" 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber statement in Post_Process function. 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Made grouping more explicit in the calculation of 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber signal[i] << 1 in the Post_Process function. 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added setting of Overflow flag in inlined code. 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Synchronized file with UMTS version 3.2.0. Updated coding 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber template. Removed unnecessary include files. 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced basic_op.h with the header file of the math functions 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used in the file. 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Made the following changes per comments from Phase 2/3 review: 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1. Updated copyright year. 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2. Fixed typecasting issue with TI C compiler. 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3. Used short-hand notation for math operations, e.g., "+=", 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber in the code. 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Removed the functions post_pro_init and post_pro_exit. 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber The post_pro related structure is no longer dynamically allocated. 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Added pOverflow as a passed in variable as per changes needed 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for the EPOC release. 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Optimized file to reduce clock cycle usage. Updated copyright 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber year and removed unused files in Include section. 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced OSCL mem type functions and eliminated include 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber files that now are chosen by OSCL definitions 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Changed round function name to pv_round to avoid conflict with 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber round function in C standard library. 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber MODULE DESCRIPTION 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This file contains the function that performs post-processing on the output 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber speech. Post-processing include filtering the output speech through a second 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber order high pass filter with cutoff frequency of 60 Hz, and up-scaling the 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber output speech by a factor of 2. In addition to the post-processing function 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber itself, a post-processing initialization function, post-processing reset 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber function, and post-processing exit function are also included in this file. 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "post_pro.h" 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "basic_op.h" 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; DEFINES 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Include all pre-processor statements here. Include conditional 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; compile variables also. 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL VARIABLE DEFINITIONS 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* filter coefficients (fc = 60 Hz) */ 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberstatic const Word16 b[3] = {7699, -15398, 7699}; 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberstatic const Word16 a[3] = {8192, 15836, -7667}; 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Post_Process_reset 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state = pointer to a structure of type Post_ProcessState 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber structure pointed to by state will have all its fields initialized 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber to zero 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return_value = 0, if reset was successful; -1, otherwise (int) 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This function initializes state memory to zero. 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber post_pro.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberint Post_Process_reset (Post_ProcessState *state) 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (state == (Post_ProcessState *) NULL){ 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber fprint(stderr, "Post_Process_reset: invalid parameter\n"); 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return -1; 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y2_hi = 0; 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y2_lo = 0; 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y1_hi = 0; 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y1_lo = 0; 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->x0 = 0; 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->x1 = 0; 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return 0; 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas HuberWord16 Post_Process_reset(Post_ProcessState *state) 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber if (state == (Post_ProcessState *) NULL) 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* fprint(stderr, "Post_Process_reset: invalid parameter\n"); */ 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return(-1); 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y2_hi = 0; 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y2_lo = 0; 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y1_hi = 0; 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->y1_lo = 0; 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->x0 = 0; 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber state->x1 = 0; 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return(0); 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/****************************************************************************/ 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Post_Process 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st = pointer to a structure of type Post_ProcessState 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber signal = buffer containing the input signal (Word16) 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lg = length of the input signal (Word16) 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow = pointer to overflow indicator of type Flag 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber structure pointed to by st contains new filter input and output values 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber signal buffer contains the HP filtered and up-scaled input signal 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow points to 1 if overflow occurs in the math functions called 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber else it points to 0. 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return_value = 0 (int) 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a = buffer containing filter coefficients 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber b = buffer containing filter coefficients 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber This function performs post-processing on the output speech signal. First, 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the output speech goes through a second order high pass filter with a 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber cutoff frequency of 60 Hz. Then, the filtered output speech is multiplied 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber by a factor of 2. The algorithm implemented follows the following difference 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber equation: 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber y[i] = b[0]*x[i]*2 + b[1]*x[i-1]*2 + b[2]*x[i-2]*2 + a[1]*y[i-1] + a[2]*y[i-2]; 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber post_pro.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huberint Post_Process ( 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Post_ProcessState *st, //i/o : post process state 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 signal[], //i/o : signal 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lg //i : length of signal 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber ) 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i, x2; 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 L_tmp; 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < lg; i++) 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber x2 = st->x1; 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->x1 = st->x0; 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->x0 = signal[i]; 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // y[i] = b[0]*x[i]*2 + b[1]*x[i-1]*2 + b140[2]*x[i-2]/2 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber // + a[1]*y[i-1] + a[2] * y[i-2]; 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = Mpy_32_16 (st->y1_hi, st->y1_lo, a[1]); 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_add (L_tmp, Mpy_32_16 (st->y2_hi, st->y2_lo, a[2])); 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_mac (L_tmp, st->x0, b[0]); 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_mac (L_tmp, st->x1, b[1]); 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_mac (L_tmp, x2, b[2]); 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = L_shl (L_tmp, 2); 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber //Multiplication by two of output speech with saturation. 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber signal[i] = pv_round(L_shl(L_tmp, 1)); 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->y2_hi = st->y1_hi; 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->y2_lo = st->y1_lo; 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_Extract (L_tmp, &st->y1_hi, &st->y1_lo); 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return 0; 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Post_Process( 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Post_ProcessState *st, /* i/o : post process state */ 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 signal[], /* i/o : signal */ 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lg, /* i : length of signal */ 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 3504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 3514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i, x2; 3524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word32 L_tmp; 3534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_signal; 3554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 c_a1 = a[1]; 3564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 c_a2 = a[2]; 3574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 c_b0 = b[0]; 3584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 c_b1 = b[1]; 3594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 c_b2 = b[2]; 3604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber p_signal = &signal[0]; 3624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < lg; i++) 3644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber x2 = st->x1; 3664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->x1 = st->x0; 3674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->x0 = *(p_signal); 3684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* y[i] = b[0]*x[i]*2 + b[1]*x[i-1]*2 + b140[2]*x[i-2]/2 */ 3704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* + a[1]*y[i-1] + a[2] * y[i-2]; */ 3714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp = ((Word32) st->y1_hi) * c_a1; 3734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp += (((Word32) st->y1_lo) * c_a1) >> 15; 3744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp += ((Word32) st->y2_hi) * c_a2; 3754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp += (((Word32) st->y2_lo) * c_a2) >> 15; 3764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp += ((Word32) st->x0) * c_b0; 3774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp += ((Word32) st->x1) * c_b1; 3784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber L_tmp += ((Word32) x2) * c_b2; 3798d5a687f4f4c50f4fc8c1a29ab7a0cd618bcf9d1PacketVideo CM L_tmp = L_shl(L_tmp, 3, pOverflow); 3804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* Multiplication by two of output speech with saturation. */ 3834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_signal++) = pv_round(L_shl(L_tmp, 1, pOverflow), pOverflow); 3854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->y2_hi = st->y1_hi; 3874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->y2_lo = st->y1_lo; 3884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->y1_hi = (Word16)(L_tmp >> 16); 3904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber st->y1_lo = (Word16)((L_tmp >> 1) - ((Word32) st->y1_hi << 15)); 3914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 3954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 396