1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /**************************************************************************************** 19 Portions of this file are derived from the following 3GPP standard: 20 21 3GPP TS 26.173 22 ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) 26 Permission to distribute, modify and use this file under the standard license 27 terms listed above has been obtained from the copyright holder. 28 ****************************************************************************************/ 29 /* 30 ------------------------------------------------------------------------------ 31 32 33 34 Pathname: ./src/pvamrwbdecoder_basic_op.h 35 36 Date: 05/07/2007 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 Description: 42 ------------------------------------------------------------------------------ 43 INCLUDE DESCRIPTION 44 45 ------------------------------------------------------------------------------ 46 */ 47 48 49 #ifndef PVAMRWBDECODER_BASIC_OP_H 50 #define PVAMRWBDECODER_BASIC_OP_H 51 52 53 #include "normalize_amr_wb.h" 54 55 56 #define MAX_32 (int32)0x7fffffffL 57 #define MIN_32 (int32)0x80000000L 58 59 #define MAX_16 ((int16)+32767) /* 0x7fff */ 60 #define MIN_16 ((int16)-32768) /* 0x8000 */ 61 62 63 64 65 /*---------------------------------------------------------------------------- 66 Function Name : negate_int16 67 68 Negate var1 with saturation, saturate in the case where input is -32768: 69 negate(var1) = sub(0,var1). 70 71 Inputs : 72 var1 73 16 bit short signed integer (int16) whose value falls in the 74 range : 0x8000 <= var1 <= 0x7fff. 75 76 Outputs : 77 none 78 79 Return Value : 80 16 bit short signed integer (int16) whose value falls in the 81 range : 0x8000 <= var_out <= 0x7fff. 82 ----------------------------------------------------------------------------*/ 83 84 __inline int16 negate_int16(int16 var1) 85 { 86 return (((var1 == MIN_16) ? MAX_16 : -var1)); 87 } 88 89 90 /*---------------------------------------------------------------------------- 91 92 Function Name : shl_int16 93 94 Arithmetically shift the 16 bit input var1 left var2 positions.Zero fill 95 the var2 LSB of the result. If var2 is negative, arithmetically shift 96 var1 right by -var2 with sign extension. Saturate the result in case of 97 underflows or overflows. 98 99 Inputs : 100 var1 101 16 bit short signed integer (int16) whose value falls in the 102 range : 0x8000 <= var1 <= 0x7fff. 103 104 var2 105 16 bit short signed integer (int16) whose value falls in the 106 range : 0x8000 <= var1 <= 0x7fff. 107 108 Return Value : 109 var_out 110 16 bit short signed integer (int16) whose value falls in the 111 range : 0x8000 <= var_out <= 0x7fff. 112 ----------------------------------------------------------------------------*/ 113 114 __inline int16 shl_int16(int16 var1, int16 var2) 115 { 116 int16 var_out; 117 118 if (var2 < 0) 119 { 120 var2 = (-var2) & (0xf); 121 var_out = var1 >> var2; 122 } 123 else 124 { 125 var2 &= 0xf; 126 var_out = var1 << var2; 127 if (var_out >> var2 != var1) 128 { 129 var_out = (var1 >> 15) ^ MAX_16; 130 } 131 } 132 return (var_out); 133 } 134 135 136 /*---------------------------------------------------------------------------- 137 138 Function Name : shl_int32 139 140 Arithmetically shift the 32 bit input L_var1 left var2 positions. Zero 141 fill the var2 LSB of the result. If var2 is negative, arithmetically 142 shift L_var1 right by -var2 with sign extension. Saturate the result in 143 case of underflows or overflows. 144 145 Inputs : 146 L_var1 32 bit long signed integer (int32) whose value falls in the 147 range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. 148 149 var2 150 16 bit short signed integer (int16) whose value falls in the 151 range : 8000 <= var2 <= 7fff. 152 Return Value : 153 32 bit long signed integer (int32) whose value falls in the 154 range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 155 156 ----------------------------------------------------------------------------*/ 157 158 __inline int32 shl_int32(int32 L_var1, int16 var2) 159 { 160 int32 L_var_out; 161 162 if (var2 > 0) 163 { 164 L_var_out = L_var1 << var2; 165 if (L_var_out >> var2 != L_var1) 166 { 167 L_var_out = (L_var1 >> 31) ^ MAX_32; 168 } 169 } 170 else 171 { 172 var2 = (-var2) & (0xf); 173 L_var_out = L_var1 >> var2; 174 } 175 176 return (L_var_out); 177 } 178 179 180 /*---------------------------------------------------------------------------- 181 182 Function Name : shr_int32 183 184 Arithmetically shift the 32 bit input L_var1 right var2 positions with 185 sign extension. If var2 is negative, arithmetically shift L_var1 left 186 by -var2 and zero fill the -var2 LSB of the result. Saturate the result 187 in case of underflows or overflows. 188 189 Inputs : 190 L_var1 32 bit long signed integer (int32) whose value falls in the 191 range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. 192 193 var2 194 16 bit short signed integer (int16) whose value falls in the 195 range : 8000 <= var2 <= 7fff. 196 Return Value : 197 32 bit long signed integer (int32) whose value falls in the 198 range : 0x8000 0000 <= L_var_out <= 0x7fff ffff. 199 200 ----------------------------------------------------------------------------*/ 201 202 __inline int32 shr_int32(int32 L_var1, int16 var2) 203 { 204 int32 L_var_out; 205 206 if (var2 >= 0) 207 { 208 L_var_out = L_var1 >> (var2 & 0x1f); 209 } 210 else 211 { 212 var2 = (int16)(-var2); 213 var2 &= 0x1f; 214 L_var_out = L_var1 << var2; 215 if (L_var_out >> var2 != L_var1) 216 { 217 L_var_out = (L_var1 >> 31) ^ MAX_32; 218 } 219 220 } 221 return (L_var_out); 222 } 223 224 225 226 227 228 229 #if defined(PV_ARM_V5) 230 231 #include "pvamrwbdecoder_basic_op_armv5.h" 232 233 #elif defined(PV_ARM_GCC_V5) 234 235 #include "pvamrwbdecoder_basic_op_gcc_armv5.h" 236 237 #else 238 239 #ifndef C_EQUIVALENT 240 #define C_EQUIVALENT // default to C_EQUIVALENT 241 #endif 242 243 #include "pvamrwbdecoder_basic_op_cequivalent.h" 244 245 #endif 246 247 248 #endif /* PVAMRWBDECODER_BASIC_OP_H */ 249 250
