1d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/* ------------------------------------------------------------------ 2d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * Copyright (C) 1998-2009 PacketVideo 3d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * 4d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * Licensed under the Apache License, Version 2.0 (the "License"); 5d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * you may not use this file except in compliance with the License. 6d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * You may obtain a copy of the License at 7d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * 8d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * http://www.apache.org/licenses/LICENSE-2.0 9d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * 10d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * Unless required by applicable law or agreed to in writing, software 11d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * distributed under the License is distributed on an "AS IS" BASIS, 12d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * express or implied. 14d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * See the License for the specific language governing permissions 15d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * and limitations under the License. 16d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * ------------------------------------------------------------------- 17d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 18d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/* 19d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 20d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 21d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber PacketVideo Corp. 22d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber MP3 Decoder Library 23d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 24d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Filename: pvmp3_get_side_info.cpp 25d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 26d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Date: 09/21/2007 27d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 28d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 29d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REVISION HISTORY 30d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 31d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 32d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Description: 33d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 34d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 35d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber INPUT AND OUTPUT DEFINITIONS 36d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 37d9618f23226f46c752e56f712bc4b505117d8b4bAndreas HuberInput 38d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3SideInfo *si, 39d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3Header *info, mp3 header information 40d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber uint32 *crc initialized crc value (if enabled) 41d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 42d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 43d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Returns 44d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 45d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3SideInfo *si, side information 46d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 47d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 48d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 49d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber FUNCTION DESCRIPTION 50d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 51d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber acquires side information 52d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 53d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 54d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REQUIREMENTS 55d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 56d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 57d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 58d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REFERENCES 59d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 60d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber [1] ISO MPEG Audio Subgroup Software Simulation Group (1996) 61d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ISO 13818-3 MPEG-2 Audio Decoder - Lower Sampling Frequency Extension 62d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 63d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 64d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber PSEUDO-CODE 65d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 66d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 67d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber*/ 68d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 69d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 70d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 71d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; INCLUDES 72d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 73d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 74d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pvmp3_get_side_info.h" 75d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pvmp3_crc.h" 76d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 77d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 78d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 79d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; MACROS 80d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Define module specific macros here 81d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 82d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 83d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 84d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 85d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; DEFINES 86d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Include all pre-processor statements here. Include conditional 87d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; compile variables also. 88d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 89d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 90d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 91d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; LOCAL FUNCTION DEFINITIONS 92d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Function Prototype declaration 93d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 94d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 95d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 96d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 97d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Variable declaration - defined here and used outside this module 98d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 99d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 100d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 101d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; EXTERNAL FUNCTION REFERENCES 102d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Declare functions defined elsewhere and referenced in this module 103d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 104d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 105d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 106d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 107d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Declare variables used in this module but defined elsewhere 108d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 109d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 110d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 111d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; FUNCTION CODE 112d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 113d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 114d9618f23226f46c752e56f712bc4b505117d8b4bAndreas HuberERROR_CODE pvmp3_get_side_info(tmp3Bits *inputStream, 115d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3SideInfo *si, 116d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3Header *info, 117d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber uint32 *crc) 118d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber{ 119d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 ch, gr; 120d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber uint32 tmp; 121d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 122d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int stereo = (info->mode == MPG_MD_MONO) ? 1 : 2; 123d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 124d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (info->version_x == MPEG_1) 125d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 126d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (stereo == 1) 127d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 128d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 14, crc, info->error_protection); 129d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->main_data_begin = (tmp << 18) >> 23; /* 9 */ 130d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->private_bits = (tmp << 23) >> 27; /* 5 */ 131d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 132d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 133d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 134d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 12, crc, info->error_protection); 135d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->main_data_begin = (tmp << 20) >> 23; /* 9 */ 136d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->private_bits = (tmp << 23) >> 29; /* 3 */ 137d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 138d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 139d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 140d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (ch = 0; ch < stereo; ch++) 141d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 142d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 4, crc, info->error_protection); 143d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].scfsi[0] = (tmp << 28) >> 31; /* 1 */ 144d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].scfsi[1] = (tmp << 29) >> 31; /* 1 */ 145d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].scfsi[2] = (tmp << 30) >> 31; /* 1 */ 146d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].scfsi[3] = tmp & 1; /* 1 */ 147d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 148d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 149d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (gr = 0; gr < 2 ; gr++) 150d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 151d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (ch = 0; ch < stereo; ch++) 152d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 153d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].part2_3_length = getbits_crc(inputStream, 12, crc, info->error_protection); 154d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 22, crc, info->error_protection); 155d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 156d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].big_values = (tmp << 10) >> 23; /* 9 */ 157d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].global_gain = ((tmp << 19) >> 24) - 210; /* 8 */ 158d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].scalefac_compress = (tmp << 27) >> 28; /* 4 */ 159d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].window_switching_flag = tmp & 1; /* 1 */ 160d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 161d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (si->ch[ch].gran[gr].window_switching_flag) 162d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 163d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 22, crc, info->error_protection); 164d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 165d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].block_type = (tmp << 10) >> 30; /* 2 */; 166d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].mixed_block_flag = (tmp << 12) >> 31; /* 1 */; 167d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 168d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].table_select[0] = (tmp << 13) >> 27; /* 5 */; 169d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].table_select[1] = (tmp << 18) >> 27; /* 5 */; 170d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 171d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].subblock_gain[0] = (tmp << 23) >> 29; /* 3 */; 172d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].subblock_gain[1] = (tmp << 26) >> 29; /* 3 */; 173d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].subblock_gain[2] = (tmp << 29) >> 29; /* 3 */; 174d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 175d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* Set region_count parameters since they are implicit in this case. */ 176d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 177d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (si->ch[ch].gran[gr].block_type == 0) 178d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 179d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber return(SIDE_INFO_ERROR); 180d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 181d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if ((si->ch[ch].gran[gr].block_type == 2) 182d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber && (si->ch[ch].gran[gr].mixed_block_flag == 0)) 183d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 184d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].region0_count = 8; /* MI 9; */ 185d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].region1_count = 12; 186d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 187d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 188d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 189d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].region0_count = 7; /* MI 8; */ 190d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].region1_count = 13; 191d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 192d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 193d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 194d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 195d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 22, crc, info->error_protection); 196d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 197d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].table_select[0] = (tmp << 10) >> 27; /* 5 */; 198d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].table_select[1] = (tmp << 15) >> 27; /* 5 */; 199d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].table_select[2] = (tmp << 20) >> 27; /* 5 */; 200d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 201d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].region0_count = (tmp << 25) >> 28; /* 4 */; 202d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].region1_count = (tmp << 29) >> 29; /* 3 */; 203d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 204d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].block_type = 0; 205d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 206d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 207d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 3, crc, info->error_protection); 208d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].preflag = (tmp << 29) >> 31; /* 1 */ 209d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].scalefac_scale = (tmp << 30) >> 31; /* 1 */ 210d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[gr].count1table_select = tmp & 1; /* 1 */ 211d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 212d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 213d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 214d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else /* Layer 3 LSF */ 215d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 216d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->main_data_begin = getbits_crc(inputStream, 8, crc, info->error_protection); 217d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->private_bits = getbits_crc(inputStream, stereo, crc, info->error_protection); 218d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 219d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (ch = 0; ch < stereo; ch++) 220d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 221d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 21, crc, info->error_protection); 222d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].part2_3_length = (tmp << 11) >> 20; /* 12 */ 223d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].big_values = (tmp << 23) >> 23; /* 9 */ 224d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 225d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 18, crc, info->error_protection); 226d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].global_gain = ((tmp << 14) >> 24) - 210; /* 8 */ 227d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].scalefac_compress = (tmp << 22) >> 23; /* 9 */ 228d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].window_switching_flag = tmp & 1; /* 1 */ 229d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 230d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (si->ch[ch].gran[0].window_switching_flag) 231d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 232d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 233d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 22, crc, info->error_protection); 234d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 235d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].block_type = (tmp << 10) >> 30; /* 2 */; 236d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].mixed_block_flag = (tmp << 12) >> 31; /* 1 */; 237d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 238d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].table_select[0] = (tmp << 13) >> 27; /* 5 */; 239d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].table_select[1] = (tmp << 18) >> 27; /* 5 */; 240d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 241d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].subblock_gain[0] = (tmp << 23) >> 29; /* 3 */; 242d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].subblock_gain[1] = (tmp << 26) >> 29; /* 3 */; 243d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].subblock_gain[2] = (tmp << 29) >> 29; /* 3 */; 244d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 245d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* Set region_count parameters since they are implicit in this case. */ 246d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 247d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (si->ch[ch].gran[0].block_type == 0) 248d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 249d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber return(SIDE_INFO_ERROR); 250d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 251d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if ((si->ch[ch].gran[0].block_type == 2) 252d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber && (si->ch[ch].gran[0].mixed_block_flag == 0)) 253d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 254d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].region0_count = 8; /* MI 9; */ 255d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].region1_count = 12; 256d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 257d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 258d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 259d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].region0_count = 7; /* MI 8; */ 260d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].region1_count = 13; 261d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 262d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 263d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 264d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 265d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 22, crc, info->error_protection); 266d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 267d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].table_select[0] = (tmp << 10) >> 27; /* 5 */; 268d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].table_select[1] = (tmp << 15) >> 27; /* 5 */; 269d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].table_select[2] = (tmp << 20) >> 27; /* 5 */; 270d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 271d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].region0_count = (tmp << 25) >> 28; /* 4 */; 272d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].region1_count = (tmp << 29) >> 29; /* 3 */; 273d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 274d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].block_type = 0; 275d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 276d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 277d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = getbits_crc(inputStream, 2, crc, info->error_protection); 278d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].scalefac_scale = tmp >> 1; /* 1 */ 279d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber si->ch[ch].gran[0].count1table_select = tmp & 1; /* 1 */ 280d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 281d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 282d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 283d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber return (NO_DECODING_ERROR); 284d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber} 285d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 286