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 ------------------------------------------------------------------------------ 20 PacketVideo Corp. 21 MP3 Decoder Library 22 23 Filename: pvmp3_dec_defs.h 24 25 Date: 09/21/2007 26 27 ------------------------------------------------------------------------------ 28 REVISION HISTORY 29 30 Description: 31 32 ------------------------------------------------------------------------------ 33 INCLUDE DESCRIPTION 34 35 This include file has the mp3 decoder common defines. 36 37 ------------------------------------------------------------------------------ 38 */ 39 40 /*---------------------------------------------------------------------------- 41 ; CONTINUE ONLY IF NOT ALREADY DEFINED 42 ----------------------------------------------------------------------------*/ 43 #ifndef PVMP3_DEC_DEFS_H 44 #define PVMP3_DEC_DEFS_H 45 46 /*---------------------------------------------------------------------------- 47 ; INCLUDES 48 ----------------------------------------------------------------------------*/ 49 #include "pvmp3_audio_type_defs.h" 50 #include "pvmp3decoder_api.h" 51 52 /*---------------------------------------------------------------------------- 53 ; MACROS 54 ; Define module specific macros here 55 ----------------------------------------------------------------------------*/ 56 #define module(x, POW2) ((x)&(POW2-1)) 57 58 /*---------------------------------------------------------------------------- 59 ; DEFINES 60 ; Include all pre-processor statements here. 61 ----------------------------------------------------------------------------*/ 62 #define BUFSIZE 8192 // big enough to hold 4608 bytes == biggest mp3 frame 63 64 #define CHAN 2 65 #define GRAN 2 66 67 68 #define SUBBANDS_NUMBER 32 69 #define FILTERBANK_BANDS 18 70 #define HAN_SIZE 512 71 72 73 /* MPEG Header Definitions - ID Bit Values */ 74 75 #define MPEG_1 0 76 #define MPEG_2 1 77 #define MPEG_2_5 2 78 #define INVALID_VERSION -1 79 80 /* MPEG Header Definitions - Mode Values */ 81 82 #define MPG_MD_STEREO 0 83 #define MPG_MD_JOINT_STEREO 1 84 #define MPG_MD_DUAL_CHANNEL 2 85 #define MPG_MD_MONO 3 86 87 88 89 #define LEFT 0 90 #define RIGHT 1 91 92 93 #define SYNC_WORD (int32)0x7ff 94 #define SYNC_WORD_LNGTH 11 95 96 /*---------------------------------------------------------------------------- 97 ; EXTERNAL VARIABLES REFERENCES 98 ; Declare variables used in this module but defined elsewhere 99 ----------------------------------------------------------------------------*/ 100 101 /*---------------------------------------------------------------------------- 102 ; SIMPLE TYPEDEF'S 103 ----------------------------------------------------------------------------*/ 104 105 /*---------------------------------------------------------------------------- 106 ; ENUMERATED TYPEDEF'S 107 ----------------------------------------------------------------------------*/ 108 #ifdef __cplusplus 109 extern "C" 110 { 111 #endif 112 113 /*---------------------------------------------------------------------------- 114 ; STRUCTURES TYPEDEF'S 115 ----------------------------------------------------------------------------*/ 116 117 /* Header Information Structure */ 118 119 typedef struct 120 { 121 int32 version_x; 122 int32 layer_description; 123 int32 error_protection; 124 int32 bitrate_index; 125 int32 sampling_frequency; 126 int32 padding; 127 int32 extension; 128 int32 mode; 129 int32 mode_ext; 130 int32 copyright; 131 int32 original; 132 int32 emphasis; 133 } mp3Header; 134 135 136 /* Layer III side information. */ 137 138 typedef struct 139 { 140 uint32 part2_3_length; 141 uint32 big_values; 142 int32 global_gain; 143 uint32 scalefac_compress; 144 uint32 window_switching_flag; 145 uint32 block_type; 146 uint32 mixed_block_flag; 147 uint32 table_select[3]; 148 uint32 subblock_gain[3]; 149 uint32 region0_count; 150 uint32 region1_count; 151 uint32 preflag; 152 uint32 scalefac_scale; 153 uint32 count1table_select; 154 155 } granuleInfo; 156 157 typedef struct 158 { 159 uint32 scfsi[4]; 160 granuleInfo gran[2]; 161 162 } channelInfo; 163 164 /* Layer III side info. */ 165 166 typedef struct 167 { 168 uint32 main_data_begin; 169 uint32 private_bits; 170 channelInfo ch[2]; 171 172 } mp3SideInfo; 173 174 /* Layer III scale factors. */ 175 typedef struct 176 { 177 int32 l[23]; /* [cb] */ 178 int32 s[3][13]; /* [window][cb] */ 179 180 } mp3ScaleFactors; 181 182 183 #ifdef __cplusplus 184 } 185 #endif 186 187 /*---------------------------------------------------------------------------- 188 ; GLOBAL FUNCTION DEFINITIONS 189 ; Function Prototype declaration 190 ----------------------------------------------------------------------------*/ 191 192 /*---------------------------------------------------------------------------- 193 ; END 194 ----------------------------------------------------------------------------*/ 195 196 #endif 197 198 199 200
