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 Pathname: ./audio/gsm-amr/c/src/int_lpc.c 314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Functions: 324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REVISION HISTORY 354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Updated template used to PV coding template. 374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Changed to accept the pOverflow flag for EPOC compatibility. 384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Per review comments, replaced includes of "basic_op.h" 404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber and "count.h" with "shr.h", "sub.h", and "add.h" 414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: For Int_lpc_1and3() and Int_lpc_1and3_2() 434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1. Replaced array addressing by pointers 444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2. Eliminated math operations that unnecessary checked for 454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber saturation 464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3. Unrolled loops to speed up processing 474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: Replaced "int" and/or "char" with OSCL defined types. 494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Who: Date: 524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description: 534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber MODULE DESCRIPTION 564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; INCLUDES 634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "int_lpc.h" 654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "typedef.h" 664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "cnst.h" 674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "lsp_az.h" 684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber#include "basic_op.h" 694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; MACROS 724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Define module specific macros here 734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; DEFINES 774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Include all pre-processor statements here. Include conditional 784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; compile variables also. 794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL FUNCTION DEFINITIONS 834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Function Prototype declaration 844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/*---------------------------------------------------------------------------- 874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; LOCAL VARIABLE DEFINITIONS 884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber; Variable declaration - defined here and used outside this module 894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber----------------------------------------------------------------------------*/ 904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Int_lpc_1and3 954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_old -- array of type Word16 -- LSP vector at the 1004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4th subfr. of past frame (M) 1014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_mid -- array of type Word16 -- LSP vector at the 2nd subfr. of 1024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) 1034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_new -- array of type Word16 -- LSP vector at the 4th subfr. of 1044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) 1054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 1074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az -- array of type Word16 -- interpolated LP parameters in all subfr. 1084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (AZ_SIZE) 1094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow -- pointer to type Flag -- Overflow indicator 1104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 1124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 1154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 1184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 1224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Purpose : Interpolates the LSPs and converts to LPC parameters 1244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber to get a different LP filter in each subframe. 1254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Description : The 20 ms speech frame is divided into 4 subframes. 1264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber The LSPs are quantized and transmitted at the 2nd and 1274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4th subframes (twice per frame) and interpolated at the 1284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1st and 3rd subframe. 1294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber |------|------|------|------| 1314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sf1 sf2 sf3 sf4 1324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber F0 Fm F1 1334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sf1: 1/2 Fm + 1/2 F0 sf3: 1/2 F1 + 1/2 Fm 1354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sf2: Fm sf4: F1 1364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 1394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 1414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 1444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int_lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 1464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 1494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 1534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 1554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 1564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 1584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 1604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 1624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 1634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 1644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 1654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 1664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 1694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 1704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 1724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 1734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Int_lpc_1and3( 1754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_old[], /* i : LSP vector at the 4th subfr. of past frame (M) */ 1764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_mid[], /* i : LSP vector at the 2nd subfr. of 1774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) */ 1784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_new[], /* i : LSP vector at the 4th subfr. of 1794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) */ 1804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Az[], /* o : interpolated LP parameters in all subfr. 1814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (AZ_SIZE) */ 1824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 1834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 1844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 1854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 1864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp[M]; 1874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp_old = &lsp_old[0]; 1884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp_mid = &lsp_mid[0]; 1894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp_new = &lsp_new[0]; 1904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp = &lsp[0]; 1914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* lsp[i] = lsp_mid[i] * 0.5 + lsp_old[i] * 0.5 */ 1934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 1944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = M >> 1; i != 0; i--) 1954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 1964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_old++) >> 1) + (*(p_lsp_mid++) >> 1); 1974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_old++) >> 1) + (*(p_lsp_mid++) >> 1); 1984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 1994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 2014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 2024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 2034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 1 */ 2044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 2064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 2084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_mid, 2094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 2104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 2 */ 2114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 2134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber p_lsp_mid = &lsp_mid[0]; 2154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber p_lsp = &lsp[0]; 2164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = M >> 1; i != 0; i--) 2184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 2194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_mid++) >> 1) + (*(p_lsp_new++) >> 1); 2204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_mid++) >> 1) + (*(p_lsp_new++) >> 1); 2214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 2224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 2244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 2254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 2264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 3 */ 2274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 2294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 2314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_new, 2324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 2334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 4 */ 2344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 2364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 2374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 2404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Int_lpc_1and3_2 2424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 2444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 2464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_old -- array of type Word16 -- LSP vector at the 2474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4th subfr. of past frame (M) 2484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_mid -- array of type Word16 -- LSP vector at the 2nd subfr. of 2494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) 2504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_new -- array of type Word16 -- LSP vector at the 4th subfr. of 2514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) 2524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 2544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az -- array of type Word16 -- interpolated LP parameters in. 2554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber subfr 1 and 2. 2564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow -- pointer to type Flag -- Overflow indicator 2574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 2594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 2604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 2624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 2654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 2664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 2694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Purpose : Interpolation of the LPC parameters. Same as the Int_lpc 2714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber function but we do not recompute Az() for subframe 2 and 2724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4 because it is already available. 2734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 2764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 2784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 2814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int_lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 2834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 2864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 2894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 2904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 2924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 2934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 2954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 2974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 2984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 2994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 3004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 3014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 3024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 3034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 3064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 3074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 3104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Int_lpc_1and3_2( 3124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_old[], /* i : LSP vector at the 4th subfr. of past frame (M) */ 3134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_mid[], /* i : LSP vector at the 2nd subframe of 3144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) */ 3154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_new[], /* i : LSP vector at the 4th subframe of 3164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) */ 3174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Az[], /* o :interpolated LP parameters 3184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber in subframes 1 and 3 (AZ_SIZE) */ 3194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 3204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 3214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 3224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 3234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp[M]; 3244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp_old = &lsp_old[0]; 3254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp_mid = &lsp_mid[0]; 3264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp_new = &lsp_new[0]; 3274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 *p_lsp = &lsp[0]; 3284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber /* lsp[i] = lsp_mid[i] * 0.5 + lsp_old[i] * 0.5 */ 3304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = M >> 1; i != 0; i--) 3324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_old++) >> 1) + (*(p_lsp_mid++) >> 1); 3344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_old++) >> 1) + (*(p_lsp_mid++) >> 1); 3354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az(lsp, Az, pOverflow); /* Subframe 1 */ 3374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1 * 2; 3384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber p_lsp_mid = &lsp_mid[0]; 3404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber p_lsp = &lsp[0]; 3414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = M >> 1; i != 0; i--) 3434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 3444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_mid++) >> 1) + (*(p_lsp_new++) >> 1); 3454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber *(p_lsp++) = (*(p_lsp_mid++) >> 1) + (*(p_lsp_new++) >> 1); 3464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 3474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az(lsp, Az, pOverflow); /* Subframe 3 */ 3494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 3514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 3524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 3554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: lsp 3574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 3594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 3614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_old -- array of type Word16 -- LSP vector at the 3624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4th subfr. of past frame (M) 3634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_new -- array of type Word16 -- LSP vector at the 4th subfr. of 3644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) 3654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 3674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az -- array of type Word16 -- interpolated LP parameters in. 3684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber all subframes. 3694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow -- pointer to type Flag -- Overflow indicator 3704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 3724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 3734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 3754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 3784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 3794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 3824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PURPOSE: Interpolates the LSPs and convert to LP parameters to get 3844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber a different LP filter in each subframe. 3854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber DESCRIPTION: 3874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber The 20 ms speech frame is divided into 4 subframes. 3884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber The LSPs are quantized and transmitted at the 4th subframe 3894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber (once per frame) and interpolated at the 1st, 2nd and 3rd subframe. 3904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber |------|------|------|------| 3924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sf1 sf2 sf3 sf4 3934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber F0 F1 3944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sf1: 3/4 F0 + 1/4 F1 sf3: 1/4 F0 + 3/4 F1 3964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber sf2: 1/2 F0 + 1/2 F1 sf4: F1 3974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 3984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 3994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 4004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 4024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 4054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int_lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 4074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 4104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 4144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 4164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 4174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 4194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 4214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 4234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 4244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 4254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 4264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 4274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 4304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 4314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 4334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 4344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Int_lpc_1to3( 4364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_old[], /* input : LSP vector at the 4th SF of past frame */ 4374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_new[], /* input : LSP vector at the 4th SF of present frame */ 4384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Az[], /* output: interpolated LP parameters in all SFs */ 4394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 4404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 4414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 4424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 4434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 temp; 4444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 temp2; 4454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp[M]; 4474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) 4494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = shr(lsp_old[i], 2, pOverflow); 4514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = sub(lsp_old[i], temp, pOverflow); 4524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp2 = shr(lsp_new[i], 2, pOverflow); 4534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp[i] = add(temp2, temp, pOverflow); 4554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 4584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 4594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 4604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 1 */ 4614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 4634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) 4664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = shr(lsp_new[i], 1, pOverflow); 4684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp2 = shr(lsp_old[i], 1, pOverflow); 4694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp[i] = add(temp, temp2, pOverflow); 4704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 4734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 4744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 4754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 2 */ 4764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 4784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) 4804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 4814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = shr(lsp_new[i], 2, pOverflow); 4824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = sub(lsp_new[i], temp, pOverflow); 4834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp2 = shr(lsp_old[i], 2, pOverflow); 4844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp[i] = add(temp2, temp, pOverflow); 4864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 4874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 4894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 4904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 4914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 3 */ 4924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 4944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 4964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_new, 4974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 4984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 4 */ 4994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 5014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 5024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber/* 5034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION NAME: Int_lpc_1to3_2 5054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber INPUT AND OUTPUT DEFINITIONS 5074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Inputs: 5094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_old -- array of type Word16 -- LSP vector at the 5104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 4th subfr. of past frame (M) 5114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp_new -- array of type Word16 -- LSP vector at the 4th subfr. of 5124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber present frame (M) 5134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Outputs: 5154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az -- array of type Word16 -- interpolated LP parameters in. 5164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber subfr 1, 2, and 3. 5174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow -- pointer to type Flag -- Overflow indicator 5184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Returns: 5204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 5214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Global Variables Used: 5234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 5244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Local Variables Needed: 5264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 5274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber FUNCTION DESCRIPTION 5304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Interpolation of the LPC parameters. 5324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Same as the previous function but we do not recompute Az() for 5334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber subframe 4 because it is already available. 5344f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5354f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5364f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REQUIREMENTS 5374f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5384f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber None 5394f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5404f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5414f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber REFERENCES 5424f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5434f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber int_lpc.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 5444f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5454f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5464f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber PSEUDO-CODE 5474f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5484f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5494f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5504f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber RESOURCES USED [optional] 5514f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5524f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber When the code is written for a specific target processor the 5534f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber the resources used should be documented below. 5544f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5554f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber HEAP MEMORY USED: x bytes 5564f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5574f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber STACK MEMORY USED: x bytes 5584f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5594f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 5604f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber used to represent cycle count for each subroutine 5614f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber called) 5624f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber where: (cycle count variable) = cycle count for [subroutine 5634f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber name] 5644f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5654f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5664f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber CAUTION [optional] 5674f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber [State any special notes, constraints or cautions for users of this function] 5684f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5694f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber------------------------------------------------------------------------------ 5704f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber*/ 5714f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5724f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Hubervoid Int_lpc_1to3_2( 5734f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_old[], /* input : LSP vector at the 4th SF of past frame */ 5744f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp_new[], /* input : LSP vector at the 4th SF of present frame */ 5754f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 Az[], /* output: interpolated LP parameters in SFs 1,2,3 */ 5764f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Flag *pOverflow 5774f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber) 5784f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber{ 5794f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 i; 5804f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 temp; 5814f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 temp2; 5824f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Word16 lsp[M]; 5834f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5844f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) 5854f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 5864f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = shr(lsp_old[i], 2, pOverflow); 5874f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5884f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = sub(lsp_old[i], temp, pOverflow); 5894f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5904f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp2 = shr(lsp_new[i], 2, pOverflow); 5914f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5924f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp[i] = add(temp2, temp, pOverflow); 5934f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 5944f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 5954f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 5964f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 5974f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 5984f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 1 */ 5994f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6004f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 6014f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6024f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) 6034f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 6044f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = shr(lsp_new[i], 1, pOverflow); 6054f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp2 = shr(lsp_old[i], 1, pOverflow); 6064f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6074f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp[i] = add(temp2, temp, pOverflow); 6084f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6094f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6104f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 6114f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 6124f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 6134f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 2 */ 6144f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6154f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az += MP1; 6164f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6174f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber for (i = 0; i < M; i++) 6184f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber { 6194f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = shr(lsp_new[i], 2, pOverflow); 6204f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp = sub(lsp_new[i], temp, pOverflow); 6214f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber temp2 = shr(lsp_old[i], 2, pOverflow); 6224f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6234f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp[i] = add(temp, temp2, pOverflow); 6244f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber } 6254f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6264f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Lsp_Az( 6274f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber lsp, 6284f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber Az, 6294f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber pOverflow); /* Subframe 3 */ 6304f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 6314f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber return; 6324f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber} 6334f1efc098cb5791c3e9f483f2af84aef70d2d0a0Andreas Huber 634