1b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* ------------------------------------------------------------------ 2b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * Copyright (C) 1998-2009 PacketVideo 3b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * 4b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 5b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * you may not use this file except in compliance with the License. 6b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * You may obtain a copy of the License at 7b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * 8b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * http://www.apache.org/licenses/LICENSE-2.0 9b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * 10b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * Unless required by applicable law or agreed to in writing, software 11b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 12b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * express or implied. 14b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * See the License for the specific language governing permissions 15b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * and limitations under the License. 16b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber * ------------------------------------------------------------------- 17b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber */ 18b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/**************************************************************************************** 19b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberPortions of this file are derived from the following 3GPP standard: 20b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 21b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 3GPP TS 26.073 22b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Available from http://www.3gpp.org 24b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 25b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas HuberPermission to distribute, modify and use this file under the standard license 27b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huberterms listed above has been obtained from the copyright holder. 28b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber****************************************************************************************/ 29b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 30b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 31b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 32b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 33b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 34b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Filename: /audio/gsm_amr/c/src/l_extract.c 35b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 36b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Date: 09/07/2000 37b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 38b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 39b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REVISION HISTORY 40b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 41b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: Updated template. Changed function interface to pass in a 42b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pointer to overflow flag into the function instead of using a 43b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber global flag. Changed names of function parameters for clarity. 44b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Removed inclusion of unwanted header files. 45b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 46b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Description: 47b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 48b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 49b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 50b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 51b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 52b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; INCLUDES 53b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 54b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber#include "basic_op.h" 55b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 56b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 57b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; MACROS 58b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; [Define module specific macros here] 59b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 60b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 61b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 62b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; DEFINES 63b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; [Include all pre-processor statements here. Include conditional 64b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; compile variables also.] 65b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 66b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 67b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 68b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL FUNCTION DEFINITIONS 69b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; [List function prototypes here] 70b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 71b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 72b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 73b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; LOCAL VARIABLE DEFINITIONS 74b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; [Variable declaration - defined here and used outside this module] 75b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 76b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 77b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 78b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/* 79b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 80b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION NAME: L_extract 81b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 82b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber INPUT AND OUTPUT DEFINITIONS 83b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 84b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Inputs: 85b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber L_var = 32 bit signed integer (Word32) whose value falls 86b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber in the range : 0x8000 0000 <= L_32 <= 0x7fff ffff. 87b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 88b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pL_var_hi = pointer to the most significant word of L_var (Word16). 89b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 90b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pL_var_lo = pointer to the least significant word of L_var shifted 91b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber to the left by 1 (Word16). 92b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 93b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pOverflow = pointer to overflow (Flag) 94b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 95b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Outputs: 96b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pOverflow -> 1 if the 32 bit add operation resulted in overflow 97b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pL_var_hi -> MS word of L_32. 98b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pL_var_lo -> LS word of L_32 shifted left by 1. 99b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 100b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Returns: 101b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 102b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 103b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Global Variables Used: 104b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 105b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 106b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Local Variables Needed: 107b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 108b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 109b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 110b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber FUNCTION DESCRIPTION 111b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 112b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber This function extracts two 16-bit double precision format (DPF) numbers 113b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber from a 32-bit integer. The MS word of L_var will be stored in the location 114b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber pointed to by pL_var_hi and the shifted LS word of L_var will be stored in 115b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the location pointed to by pL_var_lo. 116b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 117b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 118b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REQUIREMENTS 119b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 120b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber None 121b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 122b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 123b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber REFERENCES 124b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 125b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [1] L_extract() function in oper_32b.c, UMTS GSM AMR speech codec, R99 - 126b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Version 3.2.0, March 2, 2001 127b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 128b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 129b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber PSEUDO-CODE 130b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 131b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 132b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 133b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber RESOURCES USED [optional] 134b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 135b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber When the code is written for a specific target processor the 136b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber the resources used should be documented below. 137b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 138b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber HEAP MEMORY USED: x bytes 139b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 140b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber STACK MEMORY USED: x bytes 141b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 142b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CLOCK CYCLES: (cycle count equation for this function) + (variable 143b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber used to represent cycle count for each subroutine 144b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber called) 145b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber where: (cycle count variable) = cycle count for [subroutine 146b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber name] 147b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 148b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 149b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber CAUTION [optional] 150b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber [State any special notes, constraints or cautions for users of this function] 151b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 152b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber------------------------------------------------------------------------------ 153b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber*/ 154b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 155b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber/*---------------------------------------------------------------------------- 156b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber; FUNCTION CODE 157b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber----------------------------------------------------------------------------*/ 158b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Hubervoid L_Extract(Word32 L_var, 159b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 *pL_var_hi, 160b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word16 *pL_var_lo, 161b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Flag *pOverflow) 162b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber{ 163b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 164b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber Word32 temp; 165b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 166b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber OSCL_UNUSED_ARG(pOverflow); 167b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 168b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber temp = (L_var >> 16); 169b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 170b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *(pL_var_hi) = (Word16) temp; 171b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber *(pL_var_lo) = (Word16)((L_var >> 1) - (temp << 15)); 172b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber 173b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber return; 174b841f14f8e51f2365945281fbfa54ef6a1b1b5a6Andreas Huber} 175