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 Filename: band_pass_6k_7k.cpp 35 36 Date: 05/08/2004 37 38 ------------------------------------------------------------------------------ 39 REVISION HISTORY 40 41 42 Description: 43 44 ------------------------------------------------------------------------------ 45 INPUT AND OUTPUT DEFINITIONS 46 47 int16 signal[], input signal / output is divided by 16 48 int16 lg, lenght of signal 49 int16 mem[] in/out: memory (size=30) 50 int16 x[] scratch mem ( size= 60) 51 52 ------------------------------------------------------------------------------ 53 FUNCTION DESCRIPTION 54 55 15th order band pass 6kHz to 7kHz FIR filter. 56 57 frequency: 4kHz 5kHz 5.5kHz 6kHz 6.5kHz 7kHz 7.5kHz 8kHz 58 dB loss: -60dB -45dB -13dB -3dB 0dB -3dB -13dB -45dB 59 60 61 ------------------------------------------------------------------------------ 62 REQUIREMENTS 63 64 65 ------------------------------------------------------------------------------ 66 REFERENCES 67 68 ------------------------------------------------------------------------------ 69 PSEUDO-CODE 70 71 ------------------------------------------------------------------------------ 72 */ 73 74 75 /*---------------------------------------------------------------------------- 76 ; INCLUDES 77 ----------------------------------------------------------------------------*/ 78 79 80 #include "pv_amr_wb_type_defs.h" 81 #include "pvamrwbdecoder_basic_op.h" 82 #include "pvamrwbdecoder_acelp.h" 83 #include "pvamrwbdecoder_cnst.h" 84 85 /*---------------------------------------------------------------------------- 86 ; MACROS 87 ; Define module specific macros here 88 ----------------------------------------------------------------------------*/ 89 90 91 /*---------------------------------------------------------------------------- 92 ; DEFINES 93 ; Include all pre-processor statements here. Include conditional 94 ; compile variables also. 95 ----------------------------------------------------------------------------*/ 96 97 #define L_FIR 30 98 99 /*---------------------------------------------------------------------------- 100 ; LOCAL FUNCTION DEFINITIONS 101 ; Function Prototype declaration 102 ----------------------------------------------------------------------------*/ 103 104 /*---------------------------------------------------------------------------- 105 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 106 ; Variable declaration - defined here and used outside this module 107 ----------------------------------------------------------------------------*/ 108 109 /* filter coefficients (gain=4.0) */ 110 111 const int16 fir_6k_7k[L_FIR] = 112 { 113 -32, 47, 32, -27, 114 -369, 1122, -1421, 0, 115 3798, -8880, 12349, -10984, 116 3548, 7766, -18001, 117 22118, 118 -18001, 7766, 3548, -10984, 119 12349, -8880, 3798, 0, 120 -1421, 1122, -369, -27, 121 32, 47 122 }; 123 124 /*---------------------------------------------------------------------------- 125 ; EXTERNAL FUNCTION REFERENCES 126 ; Declare functions defined elsewhere and referenced in this module 127 ----------------------------------------------------------------------------*/ 128 129 /*---------------------------------------------------------------------------- 130 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 131 ; Declare variables used in this module but defined elsewhere 132 ----------------------------------------------------------------------------*/ 133 134 /*---------------------------------------------------------------------------- 135 ; FUNCTION CODE 136 ----------------------------------------------------------------------------*/ 137 138 void band_pass_6k_7k_init(int16 mem[]) /* mem[30] */ 139 { 140 pv_memset((void *)mem, 0, L_FIR*sizeof(*mem)); 141 } 142 143 144 /*---------------------------------------------------------------------------- 145 ; FUNCTION CODE 146 ----------------------------------------------------------------------------*/ 147 148 149 void band_pass_6k_7k( 150 int16 signal[], /* input: signal */ 151 int16 lg, /* input: length of input */ 152 int16 mem[], /* in/out: memory (size=30) */ 153 int16 x[] 154 ) 155 { 156 int16 i, j; 157 int32 L_tmp1; 158 int32 L_tmp2; 159 int32 L_tmp3; 160 int32 L_tmp4; 161 162 int16 *pt_sign = signal; 163 164 pv_memcpy((void *)x, (void *)mem, L_FIR*sizeof(*x)); 165 166 167 for (i = 0; i < lg >> 2; i++) 168 { 169 170 x[(i<<2) + L_FIR ] = *(pt_sign) >> 2; /* gain of filter = 4 */ 171 x[(i<<2) + L_FIR + 1] = *(pt_sign + 1) >> 2; /* gain of filter = 4 */ 172 x[(i<<2) + L_FIR + 2] = *(pt_sign + 2) >> 2; /* gain of filter = 4 */ 173 x[(i<<2) + L_FIR + 3] = *(pt_sign + 3) >> 2; /* gain of filter = 4 */ 174 175 L_tmp1 = 0x00004000; 176 L_tmp2 = 0x00004000; 177 L_tmp3 = 0x00004000; 178 L_tmp4 = 0x00004000; 179 180 L_tmp1 -= ((int32)x[(i<<2)+L_FIR ] << 5); 181 L_tmp2 -= ((int32)x[(i<<2)+L_FIR+1] << 5); 182 L_tmp3 -= ((int32)x[(i<<2)+L_FIR+2] << 5); 183 L_tmp4 -= ((int32)x[(i<<2)+L_FIR+3] << 5); 184 185 L_tmp1 -= ((int32)x[(i<<2)] << 5); 186 L_tmp2 -= ((int32)x[(i<<2)+1] << 5); 187 L_tmp3 -= ((int32)x[(i<<2)+2] << 5); 188 L_tmp4 -= ((int32)x[(i<<2)+3] << 5); 189 190 191 for (j = 1; j < L_FIR - 1; j += 4) 192 { 193 int16 tmp1 = x[(i<<2)+j ]; 194 int16 tmp2 = x[(i<<2)+j+1]; 195 int16 tmp3 = x[(i<<2)+j+2]; 196 197 L_tmp1 = fxp_mac_16by16(tmp1, fir_6k_7k[j ], L_tmp1); 198 L_tmp2 = fxp_mac_16by16(tmp2, fir_6k_7k[j ], L_tmp2); 199 L_tmp1 = fxp_mac_16by16(tmp2, fir_6k_7k[j+1], L_tmp1); 200 L_tmp2 = fxp_mac_16by16(tmp3, fir_6k_7k[j+1], L_tmp2); 201 L_tmp3 = fxp_mac_16by16(tmp3, fir_6k_7k[j ], L_tmp3); 202 L_tmp1 = fxp_mac_16by16(tmp3, fir_6k_7k[j+2], L_tmp1); 203 204 tmp1 = x[(i<<2)+j+3]; 205 tmp2 = x[(i<<2)+j+4]; 206 207 L_tmp2 = fxp_mac_16by16(tmp1, fir_6k_7k[j+2], L_tmp2); 208 L_tmp4 = fxp_mac_16by16(tmp1, fir_6k_7k[j ], L_tmp4); 209 L_tmp3 = fxp_mac_16by16(tmp1, fir_6k_7k[j+1], L_tmp3); 210 L_tmp1 = fxp_mac_16by16(tmp1, fir_6k_7k[j+3], L_tmp1); 211 L_tmp2 = fxp_mac_16by16(tmp2, fir_6k_7k[j+3], L_tmp2); 212 L_tmp4 = fxp_mac_16by16(tmp2, fir_6k_7k[j+1], L_tmp4); 213 L_tmp3 = fxp_mac_16by16(tmp2, fir_6k_7k[j+2], L_tmp3); 214 215 tmp1 = x[(i<<2)+j+5]; 216 tmp2 = x[(i<<2)+j+6]; 217 218 L_tmp4 = fxp_mac_16by16(tmp1, fir_6k_7k[j+2], L_tmp4); 219 L_tmp3 = fxp_mac_16by16(tmp1, fir_6k_7k[j+3], L_tmp3); 220 L_tmp4 = fxp_mac_16by16(tmp2, fir_6k_7k[j+3], L_tmp4); 221 222 } 223 224 L_tmp1 = fxp_mac_16by16(x[(i<<2)+j ], fir_6k_7k[L_FIR-1 ], L_tmp1); 225 L_tmp2 = fxp_mac_16by16(x[(i<<2)+j+1], fir_6k_7k[L_FIR-1 ], L_tmp2); 226 L_tmp3 = fxp_mac_16by16(x[(i<<2)+j+2], fir_6k_7k[L_FIR-1 ], L_tmp3); 227 L_tmp4 = fxp_mac_16by16(x[(i<<2)+j+3], fir_6k_7k[L_FIR-1 ], L_tmp4); 228 229 230 *(pt_sign++) = (int16)(L_tmp1 >> 15); 231 *(pt_sign++) = (int16)(L_tmp2 >> 15); 232 *(pt_sign++) = (int16)(L_tmp3 >> 15); 233 *(pt_sign++) = (int16)(L_tmp4 >> 15); 234 235 } 236 237 pv_memcpy((void *)mem, (void *)(x + lg), L_FIR*sizeof(*mem)); 238 239 } 240 241
