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 26.073 22 ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec 23 Available from http://www.3gpp.org 24 25 (C) 2004, 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: ./audio/gsm-amr/c/src/ets_to_wmf.c 35 Funtions: ets_to_wmf 36 37 Date: 01/23/2002 38 39 ------------------------------------------------------------------------------ 40 REVISION HISTORY 41 42 Description: Modified code as per review comments regarding things such as 43 adding the tables in bitreorder_tab.c to the Global section of 44 the input/output section of the template and removing the #define 45 of 244 since it wasn't needed in this function. 46 47 Description: Fixed the loop that packs the last octet of the WMF output. 48 49 Description: Replaced "int" and/or "char" with OSCL defined types. 50 51 Description: 52 53 ------------------------------------------------------------------------------ 54 */ 55 56 /*---------------------------------------------------------------------------- 57 ; INCLUDES 58 ----------------------------------------------------------------------------*/ 59 #include "ets_to_wmf.h" 60 #include "typedef.h" 61 #include "bitreorder_tab.h" 62 63 /*---------------------------------------------------------------------------- 64 ; MACROS 65 ; Define module specific macros here 66 ----------------------------------------------------------------------------*/ 67 68 /*---------------------------------------------------------------------------- 69 ; DEFINES 70 ; Include all pre-processor statements here. Include conditional 71 ; compile variables also. 72 ----------------------------------------------------------------------------*/ 73 74 75 /*---------------------------------------------------------------------------- 76 ; LOCAL FUNCTION DEFINITIONS 77 ; Function Prototype declaration 78 ----------------------------------------------------------------------------*/ 79 80 /*---------------------------------------------------------------------------- 81 ; LOCAL VARIABLE DEFINITIONS 82 ; Variable declaration - defined here and used outside this module 83 ----------------------------------------------------------------------------*/ 84 85 86 /* 87 ------------------------------------------------------------------------------ 88 FUNCTION NAME: ets_to_wmf 89 ------------------------------------------------------------------------------ 90 INPUT AND OUTPUT DEFINITIONS 91 92 Inputs: 93 frame_type_3gpp = decoder speech bit rate (enum Frame_Type_3GPP) 94 ets_input_ptr = pointer to input encoded speech bits in ETS format (Word16) 95 wmf_output_ptr = pointer to output encoded speech bits in WMF format(UWord8) 96 97 Outputs: 98 wmf_output_ptr = pointer to encoded speech bits in the WMF format (UWord8) 99 100 Returns: 101 None 102 103 Global Variables Used: 104 numOfBits = table of values that describe the number of bits per frame for 105 each 3GPP frame type mode. The table is type const Word16 and has 106 NUM_MODES elements. This table is located in bitreorder_tab.c. 107 reorderBits = table of pointers that point to tables used to reorder the 108 encoded speech bits when converting from ETS to WMF or IF2 109 format. The table is of type const Word16 * and contains 110 NUM_MODES-1 elements. This table is located in bitreorder_tab.c. 111 112 Local Variables Needed: 113 None 114 115 ------------------------------------------------------------------------------ 116 FUNCTION DESCRIPTION 117 118 This function performs a transformation on the data buffers. It converts the 119 data format from ETS (European Telecommunication Standard) to WMF (wireless 120 multimedia forum). ETS format has the encoded speech bits each separate with 121 only one bit stored in each word. WMF is the storage format where the frame 122 type is in the first four bits of the first byte. This first byte has the 123 upper four bits as padded zeroes. The following bytes contain the rest of the 124 encoded speech bits. The final byte has padded zeros to make the frame byte 125 aligned. 126 ------------------------------------------------------------------------------ 127 REQUIREMENTS 128 129 None 130 131 ------------------------------------------------------------------------------ 132 REFERENCES 133 134 None 135 136 ------------------------------------------------------------------------------ 137 PSEUDO-CODE 138 139 140 141 ------------------------------------------------------------------------------ 142 RESOURCES USED [optional] 143 144 When the code is written for a specific target processor the 145 the resources used should be documented below. 146 147 HEAP MEMORY USED: x bytes 148 149 STACK MEMORY USED: x bytes 150 151 CLOCK CYCLES: (cycle count equation for this function) + (variable 152 used to represent cycle count for each subroutine 153 called) 154 where: (cycle count variable) = cycle count for [subroutine 155 name] 156 157 ------------------------------------------------------------------------------ 158 CAUTION [optional] 159 [State any special notes, constraints or cautions for users of this function] 160 161 ------------------------------------------------------------------------------ 162 */ 163 164 void ets_to_wmf( 165 enum Frame_Type_3GPP frame_type_3gpp, 166 Word16 *ets_input_ptr, 167 UWord8 *wmf_output_ptr) 168 { 169 Word16 i; 170 Word16 k = 0; 171 Word16 j = 0; 172 Word16 *ptr_temp; 173 Word16 bits_left; 174 UWord8 accum; 175 176 if (frame_type_3gpp < AMR_SID) 177 { 178 wmf_output_ptr[j++] = (UWord8)(frame_type_3gpp) & 0x0f; 179 180 for (i = 0; i < numOfBits[frame_type_3gpp] - 7;) 181 { 182 wmf_output_ptr[j] = 183 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << 7; 184 wmf_output_ptr[j] |= 185 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << 6; 186 wmf_output_ptr[j] |= 187 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << 5; 188 wmf_output_ptr[j] |= 189 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << 4; 190 wmf_output_ptr[j] |= 191 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << 3; 192 wmf_output_ptr[j] |= 193 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << 2; 194 wmf_output_ptr[j] |= 195 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << 1; 196 wmf_output_ptr[j++] |= 197 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]]; 198 } 199 200 bits_left = numOfBits[frame_type_3gpp] - 201 (numOfBits[frame_type_3gpp] & 0xFFF8); 202 203 wmf_output_ptr[j] = 0; 204 205 for (k = 0; k < bits_left; k++) 206 { 207 wmf_output_ptr[j] |= 208 (UWord8) ets_input_ptr[reorderBits[frame_type_3gpp][i++]] << (7 - k); 209 210 } 211 } 212 else 213 { 214 wmf_output_ptr[j++] = (UWord8)(frame_type_3gpp) & 0x0f; 215 216 ptr_temp = &ets_input_ptr[0]; 217 218 for (i = numOfBits[frame_type_3gpp] - 7; i > 0; i -= 8) 219 { 220 accum = (UWord8) * (ptr_temp++) << 7; 221 accum |= (UWord8) * (ptr_temp++) << 6; 222 accum |= (UWord8) * (ptr_temp++) << 5; 223 accum |= (UWord8) * (ptr_temp++) << 4; 224 accum |= (UWord8) * (ptr_temp++) << 3; 225 accum |= (UWord8) * (ptr_temp++) << 2; 226 accum |= (UWord8) * (ptr_temp++) << 1; 227 accum |= (UWord8) * (ptr_temp++); 228 229 wmf_output_ptr[j++] = accum; 230 } 231 232 bits_left = numOfBits[frame_type_3gpp] - 233 (numOfBits[frame_type_3gpp] & 0xFFF8); 234 235 wmf_output_ptr[j] = 0; 236 237 for (i = 0; i < bits_left; i++) 238 { 239 wmf_output_ptr[j] |= *(ptr_temp++) << (7 - i); 240 } 241 } 242 243 return; 244 } 245
