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_stereo_proc.cpp 25d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 26d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Functions: 27d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 28d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side 29d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_intensity 30d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_stereo_proc 31d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 32d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 33d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 34d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huberpvmp3_st_mid_side 35d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 36d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber INPUT AND OUTPUT DEFINITIONS 37d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 38d9618f23226f46c752e56f712bc4b505117d8b4bAndreas HuberInput 39d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 40d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xr[], input channel 41d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[], 42d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Start, Location of first element where stereo intensity is applied 43d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Number number of elements affected 44d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 45d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Returns 46d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 47d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[], generated stereo channel 48d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 49d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 50d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 51d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 52d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huberpvmp3_st_intensity 53d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 54d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber INPUT AND OUTPUT DEFINITIONS 55d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 56d9618f23226f46c752e56f712bc4b505117d8b4bAndreas HuberInput 57d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 58d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xr[], input channel 59d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[], 60d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 is_pos, index to table is_ratio_factor[] 61d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Start, Location of first element where stereo intensity is applied 62d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Number number of elements affected 63d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 64d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Returns 65d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 66d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[], generated stereo channel 67d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 68d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 69d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 70d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 71d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huberpvmp3_stereo_proc 72d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 73d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber INPUT AND OUTPUT DEFINITIONS 74d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 75d9618f23226f46c752e56f712bc4b505117d8b4bAndreas HuberInput 76d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 77d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xr[], input channel 78d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[], 79d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3ScaleFactors *scalefac, scale factors structure 80d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber struct gr_info_s *gr_info, granule structure 81d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3Header *info mp3 header info 82d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Returns 83d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 84d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[], generated stereo channel 85d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 86d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 87d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 88d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber FUNCTION DESCRIPTION 89d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 90d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber stereo processing for mpeg1 layer III 91d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber After requantization, the reconstructed values are processed for ms_stereo 92d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber or intensity_stereo modes or both, before passing them to the synthesis 93d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber filterbank 94d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 95d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber In ms_stereo mode the values of the normalized middle/side channels 96d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber M[l] and S[l] are transmitted instead of the left/right channel values 97d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber L[l] and R[l]. From here, L[l] and R[l] are reconstructed 98d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 99d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Intensity_stereo is done by specifying the magnitude (via the 100d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber scalefactors of the left channel) and a stereo position is_pos[sfb], 101d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber which is transmitted instead of scalefactors of the right channel. 102d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber The stereo position is used to derive the left and right channel signals 103d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 104d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 105d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REQUIREMENTS 106d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 107d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 108d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 109d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REFERENCES 110d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 111d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber [1] ISO MPEG Audio Subgroup Software Simulation Group (1996) 112d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ISO 13818-3 MPEG-2 Audio Decoder - Lower Sampling Frequency Extension 113d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 114d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 115d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber PSEUDO-CODE 116d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 117d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 118d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber*/ 119d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 120d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 121d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 122d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; INCLUDES 123d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 124d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 125d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pvmp3_stereo_proc.h" 126d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pv_mp3dec_fxd_op.h" 127d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pvmp3_tables.h" 128d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 129d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 130d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 131d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; MACROS 132d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Define module specific macros here 133d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 134d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 135d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 136d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 137d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; DEFINES 138d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Include all pre-processor statements here. Include conditional 139d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; compile variables also. 140d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 141d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#define N31 31 142d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 143d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#define Q31_fmt(a) (int32(double(0x7FFFFFFF)*a)) 144d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 145d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 146d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; LOCAL FUNCTION DEFINITIONS 147d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Function Prototype declaration 148d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 149d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 150d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 151d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 152d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Variable declaration - defined here and used outside this module 153d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 154d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/* 155d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * TmpFac= tan(is_pos * (PI /12)); 156d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * 157d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * TmpFac /= (1 + TmpFac); 158d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * 159d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 160d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 161d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huberconst int32 is_ratio_factor[8] = {0, 162d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Q31_fmt(0.21132486540519), Q31_fmt(0.36602540378444), Q31_fmt(0.50000000000000), 163d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Q31_fmt(0.63397459621556), Q31_fmt(0.78867513459481), Q31_fmt(1.00000000000000), 164d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 0 165d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber }; 166d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 167d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 168d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; EXTERNAL FUNCTION REFERENCES 169d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Declare functions defined elsewhere and referenced in this module 170d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 171d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 172d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 173d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 174d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Declare variables used in this module but defined elsewhere 175d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 176d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 177d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 178d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; FUNCTION CODE 179d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 180d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 181d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Hubervoid pvmp3_st_mid_side(int32 xr[SUBBANDS_NUMBER*FILTERBANK_BANDS], 182d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[SUBBANDS_NUMBER*FILTERBANK_BANDS], 183d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Start, 184d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Number) 185d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber{ 186d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 187d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 *pt_xr = &xr[Start]; 188d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 *pt_xl = &xl[Start]; 189d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 190d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (int32 i = Number >> 1; i != 0; i--) 191d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 192d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xxr = *(pt_xr) << 1; 193d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xxl = *(pt_xl) << 1; 194d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xr++) = fxp_mul32_Q32((xxr + xxl), Q31_fmt(0.70710678118655)); /* Sum */ 195d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xl++) = fxp_mul32_Q32((xxr - xxl), Q31_fmt(0.70710678118655)); /* Diff */ 196d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber xxr = *(pt_xr) << 1; 197d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber xxl = *(pt_xl) << 1; 198d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xr++) = fxp_mul32_Q32((xxr + xxl), Q31_fmt(0.70710678118655)); /* Sum */ 199d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xl++) = fxp_mul32_Q32((xxr - xxl), Q31_fmt(0.70710678118655)); /* Diff */ 200d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 201d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 202d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 203d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (Number&1) 204d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 205d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xxr = *(pt_xr) << 1; 206d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xxl = *(pt_xl) << 1; 207d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xr) = fxp_mul32_Q32((xxr + xxl), Q31_fmt(0.70710678118655)); /* Sum */ 208d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xl) = fxp_mul32_Q32((xxr - xxl), Q31_fmt(0.70710678118655)); /* Diff */ 209d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 210d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 211d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber} 212d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 213d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 214d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 215d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; FUNCTION CODE 216d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 217d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 218d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Hubervoid pvmp3_st_intensity(int32 xr[SUBBANDS_NUMBER*FILTERBANK_BANDS], 219d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[SUBBANDS_NUMBER*FILTERBANK_BANDS], 220d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 is_pos, 221d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Start, 222d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 Number) 223d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber{ 224d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 225d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 TmpFac = is_ratio_factor[ is_pos & 7]; 226d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 227d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 *pt_xr = &xr[Start]; 228d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 *pt_xl = &xl[Start]; 229d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 230d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (int32 i = Number >> 1; i != 0; i--) 231d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 232d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp = fxp_mul32_Q32((*pt_xr) << 1, TmpFac); 233d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xl++) = (*pt_xr) - tmp; 234d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xr++) = tmp; 235d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber tmp = fxp_mul32_Q32((*pt_xr) << 1, TmpFac); 236d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xl++) = (*pt_xr) - tmp; 237d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xr++) = tmp; 238d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 239d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 240d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (Number&1) 241d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 242d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp = fxp_mul32_Q32((*pt_xr) << 1, TmpFac); 243d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xl) = (*pt_xr) - tmp; 244d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *(pt_xr) = tmp; 245d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 246d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 247d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber} 248d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 249d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 250d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; FUNCTION CODE 251d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 252d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Hubervoid pvmp3_stereo_proc(int32 xr[SUBBANDS_NUMBER*FILTERBANK_BANDS], 253d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xl[SUBBANDS_NUMBER*FILTERBANK_BANDS], 254d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3ScaleFactors *scalefac, 255d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber granuleInfo *gr_info, 256d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 used_freq_lines, 257d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3Header *info) 258d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber{ 259d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 260d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 261d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sb; 262d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 ss; 263d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfbNo; 264d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfbStart; 265d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 266d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfb; 267d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfbTemp; 268d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 i; 269d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 j; 270d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 271d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 272d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 i_stereo = (info->mode == MPG_MD_JOINT_STEREO) && 273d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber (info->mode_ext & 0x1); 274d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 275d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 ms_stereo = (info->mode == MPG_MD_JOINT_STEREO) && 276d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber (info->mode_ext & 0x2); 277d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 278d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfreq = info->version_x + (info->version_x << 1); 279d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfreq += info->sampling_frequency; 280d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 281d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 282d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 283d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 284d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (i_stereo) 285d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 286d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (gr_info->window_switching_flag && (gr_info->block_type == 2)) 287d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 288d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (gr_info->mixed_block_flag) 289d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 290d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 291d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * mixed blocks processing 292d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 293d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i = 31; 294d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ss = 17; 295d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sb = 0; 296d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber while (i >= 0) 297d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 298d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (xl[(i*FILTERBANK_BANDS) + ss]) 299d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 300d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sb = (i << 4) + (i << 1) + ss; 301d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i = -1; 302d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 303d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 304d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 305d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ss--; 306d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ss < 0) 307d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 308d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i--; 309d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ss = 17; 310d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 311d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 312d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 313d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 314d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (sb < 36) 315d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 316d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 317d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * mixed blocks processing: intensity bound inside long blocks 318d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 319d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 1. long blocks up to intensity border: not intensity */ 320d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 321d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (mp3_sfBandIndex[sfreq].l[4] <= sb) 322d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 323d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 4; 324d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 325d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 326d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 327d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 0; 328d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 329d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 330d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber while (mp3_sfBandIndex[sfreq].l[sfb] < sb) 331d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 332d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb++; 333d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 334d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 335d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* from that sfb on intensity stereo */ 336d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbTemp = sfb; /* save for later use */ 337d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 338d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = mp3_sfBandIndex[sfreq].l[sfb]; 339d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 340d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* from 0 up to sfbStart do ms_stereo or normal stereo */ 341d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 342d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ms_stereo) 343d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 344d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, 0, sfbStart); 345d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 346d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 347d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 2. long blocks from intensity border up to sfb band 8: intensity */ 348d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* calc. is_ratio */ 349d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 350d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 351d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* Start of intensity stereo of remaining sfc bands: */ 352d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (; sfbTemp < 8; sfbTemp++) 353d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 354d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = mp3_sfBandIndex[sfreq].l[sfbTemp]; /* = Start in 0 ... 575 */ 355d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].l[sfbTemp+1] - mp3_sfBandIndex[sfreq].l[sfbTemp]; /* No of lines to process */ 356d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 357d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (scalefac->l[sfbTemp] != 7) 358d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 359d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_intensity(xr, xl, scalefac->l[sfbTemp], sfbStart, sfbNo); 360d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 361d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if (ms_stereo) 362d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 363d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 364d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 365d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 366d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (; sfbTemp < 8; sfbTemp++) */ 367d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 368d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (j = 0; j < 3; j++) 369d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 370d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 3. short blocks from sfbcnt to last sfb do intensity stereo */ 371d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (sfbTemp = 3; sfbTemp < 13; sfbTemp++) 372d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 373d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].s[sfbTemp+1] - mp3_sfBandIndex[sfreq].s[sfbTemp]; /* No of lines to process */ 374d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = 3 * mp3_sfBandIndex[sfreq].s[sfbTemp] + j * sfbNo; 375d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 376d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (scalefac->s[j][sfbTemp] != 7) 377d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 378d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_intensity(xr, xl, scalefac->s[j][sfbTemp], sfbStart, sfbNo); 379d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 380d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if (ms_stereo) 381d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 382d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 383d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 384d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 385d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (; sfbTemp < 22; sfbTemp++) */ 386d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (j = 0; j < 3; j++) */ 387d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 388d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else /* else for (sb >= 36) */ 389d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 390d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 391d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * mixed blocks processing: intensity bound outside long blocks 392d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 393d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 394d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 395d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 396d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * 2. short blocks from sfb band 3 up to intensity border: normal stereo, ms stereo and intensity 397d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 398d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (j = 0; j < 3; j++) 399d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 400d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfbcnt; 401d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbcnt = -1; 402d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 403d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (sfb = 12; sfb >= 3; sfb--) 404d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 405d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 lines; 406d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber lines = mp3_sfBandIndex[sfreq].s[sfb+1] - mp3_sfBandIndex[sfreq].s[sfb]; 407d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i = 3 * mp3_sfBandIndex[sfreq].s[sfb] + (j + 1) * lines - 1; 408d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 409d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber while (lines > 0) 410d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 411d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (xl[i]) 412d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 413d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbcnt = sfb; 414d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = -10; 415d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber lines = -10; 416d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 417d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber lines--; 418d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i--; 419d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 420d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 421d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 422d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbcnt += 1; 423d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (sfbcnt < 3) 424d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 425d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbcnt = 3; 426d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 427d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 428d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbTemp = sfbcnt; /* for later use */ 429d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 430d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 431d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 432d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * do normal stereo or MS stereo from sfb 3 to < sfbcnt: 433d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 434d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (sb = 3; sb < sfbcnt; sb++) 435d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 436d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].s[sb+1] - mp3_sfBandIndex[sfreq].s[sb]; 437d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = 3 * mp3_sfBandIndex[sfreq].s[sb] + j * sfbNo; 438d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 439d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ms_stereo) 440d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 441d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 442d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 443d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 444d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 445d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 446d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* from sfbcnt to last sfb do intensity stereo */ 447d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (; sfbTemp < 13; sfbTemp++) 448d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 449d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].s[sfbTemp+1] - mp3_sfBandIndex[sfreq].s[sfbTemp]; /* No of lines to process */ 450d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = 3 * mp3_sfBandIndex[sfreq].s[sfbTemp] + j * sfbNo; 451d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 452d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (scalefac->s[j][sfbTemp] != 7) 453d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 454d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_intensity(xr, xl, scalefac->s[j][sfbTemp], sfbStart, sfbNo); 455d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 456d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if (ms_stereo) 457d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 458d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 459d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 460d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 461d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (; sfbTemp < 22; sfbTemp++) */ 462d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 463d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (j = 0; j < 3; j++) */ 464d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 465d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 1. long blocks up to sfb band 8: not intensity */ 466d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* from 0 to sfb 8 ms_stereo or normal stereo */ 467d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 468d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = mp3_sfBandIndex[sfreq].l[8]; 469d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 470d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ms_stereo) 471d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 472d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, 0, sfbStart); 473d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 474d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 475d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 476d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* if (gr_info->mixed_block_flag) */ 477d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 478d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 479d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 480d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * short block processing 481d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 482d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (j = 0; j < 3; j++) 483d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 484d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfbcnt = -1; 485d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 486d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (sfb = 12; sfb >= 0; sfb--) 487d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 488d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 lines = mp3_sfBandIndex[sfreq].s[sfb+1] - mp3_sfBandIndex[sfreq].s[sfb]; 489d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i = 3 * mp3_sfBandIndex[sfreq].s[sfb] + (j + 1) * lines - 1; 490d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 491d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber while (lines > 0) 492d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 493d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (xl[i]) 494d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 495d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbcnt = sfb; 496d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = -10; 497d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber lines = -10; 498d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 499d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber lines--; 500d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i--; 501d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 502d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 503d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 504d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbcnt += 1; 505d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbTemp = sfbcnt; /* for later use */ 506d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 507d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* do normal stereo or MS stereo from 0 to sfbcnt */ 508d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (sb = 0; sb < sfbcnt; sb++) 509d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 510d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].s[sb+1] - mp3_sfBandIndex[sfreq].s[sb]; 511d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = 3 * mp3_sfBandIndex[sfreq].s[sb] + j * sfbNo; 512d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 513d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ms_stereo) 514d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 515d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 516d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 517d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 518d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 519d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 520d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* from sfbcnt to last sfb do intensity stereo */ 521d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (; sfbTemp < 13; sfbTemp++) 522d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 523d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].s[sfbTemp+1] - mp3_sfBandIndex[sfreq].s[sfbTemp]; /* No of lines to process */ 524d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = 3 * mp3_sfBandIndex[sfreq].s[sfbTemp] + j * sfbNo; 525d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 526d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (scalefac->s[j][sfbTemp] != 7) 527d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 528d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_intensity(xr, xl, scalefac->s[j][sfbTemp], sfbStart, sfbNo); 529d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 530d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if (ms_stereo) 531d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 532d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 533d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 534d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 535d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (; sfbTemp < 22; sfbTemp++) */ 536d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 537d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (j = 0; j < 3; j++) */ 538d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 539d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* if( gr_info->mixed_block_flag) */ 540d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 541d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 542d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 543d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* if (gr_info->window_switching_flag && (gr_info->block_type == 2)) */ 544d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 545d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 546d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 547d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * long block processing 548d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 549d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i = 31; 550d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ss = 17; 551d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sb = 0; 552d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 553d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber while (i >= 0) 554d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 555d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (xl[(i*FILTERBANK_BANDS) + ss] != 0) 556d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 557d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sb = (i << 4) + (i << 1) + ss; 558d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i = -2; 559d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 560d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 561d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 562d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ss--; 563d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ss < 0) 564d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 565d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber i--; 566d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ss = 17; 567d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 568d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 569d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 570d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 571d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (sb) 572d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 573d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (mp3_sfBandIndex[sfreq].l[14] <= sb) 574d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 575d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 14; 576d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 577d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if (mp3_sfBandIndex[sfreq].l[7] <= sb) 578d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 579d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 7; 580d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 581d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 582d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 583d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 0; 584d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 585d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 586d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 587d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber while (mp3_sfBandIndex[sfreq].l[sfb] <= sb) 588d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 589d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb++; 590d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 591d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 592d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 593d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 594d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (i == -1) 595d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 596d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* all xr[1][][] are 0: set IS bound sfb to 0 */ 597d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 0; 598d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 599d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 600d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 601d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* xr[1][0][0] is unequal 0 and all others are 0: set IS bound sfb to 1 */ 602d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 1; 603d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 604d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 605d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 606d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbTemp = sfb; /* save for later use */ 607d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 608d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 609d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = mp3_sfBandIndex[sfreq].l[sfb]; 610d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 611d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* from 0 to sfbStart ms_stereo or normal stereo */ 612d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ms_stereo) 613d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 614d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, 0, sfbStart); 615d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 616d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 617d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* now intensity stereo of the remaining sfb's: */ 618d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (; sfb < 21; sfb++) 619d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 620d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = mp3_sfBandIndex[sfreq].l[sfb]; 621d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].l[sfb+1] - mp3_sfBandIndex[sfreq].l[sfb]; /* No of lines to process */ 622d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 623d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (scalefac->l[sfb] != 7) 624d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 625d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_intensity(xr, xl, scalefac->l[sfb], sfbStart, sfbNo); 626d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 627d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if (ms_stereo) 628d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 629d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 630d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 631d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 632d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* for (; sfbTemp < 22; sfbTemp++) */ 633d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 634d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 635d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 636d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbStart = mp3_sfBandIndex[sfreq].l[21]; 637d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbNo = mp3_sfBandIndex[sfreq].l[22] - mp3_sfBandIndex[sfreq].l[21]; /* No of lines to process */ 638d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 639d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (scalefac->l[21] != 7) 640d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 641d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (sfbTemp < 21) 642d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 643d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbTemp = scalefac->l[20]; 644d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 645d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 646d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 647d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfbTemp = 0; /* if scalefac[20] is not an intensity position, is_pos = 0 */ 648d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 649d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 650d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_intensity(xr, xl, sfbTemp, sfbStart, sfbNo); 651d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 652d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else if (ms_stereo) 653d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 654d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, sfbStart, sfbNo); 655d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 656d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 657d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* if (gr_info->window_switching_flag && (gr_info->block_type == 2)) */ 658d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 659d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 660d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* if (i_stereo) */ 661d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 662d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 663d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* 664d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber * normal or ms stereo processing 665d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber */ 666d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (ms_stereo) 667d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 668d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 669d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pvmp3_st_mid_side(xr, xl, 0, used_freq_lines); 670d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 671d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 672d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 673d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } /* if (i_stereo) */ 674d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 675d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber} 676d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 677