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_reorder.cpp 25d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 26d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 27d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Date: 09/21/2007 28d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 29d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 30d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REVISION HISTORY 31d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 32d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 33d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Description: 34d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 35d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 36d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber INPUT AND OUTPUT DEFINITIONS 37d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 38d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Inputs: 39d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 40d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xr[ ], rescaled data 41d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber struct gr_info_s *gr_info, granule structure 42d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3Header *info, mp3 header info 43f4ea1f92bc56a8ffceddba0dbd3979fe0219b13cAndreas Huber int32 Scratch_mem[198] for temporary usage 44d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 45d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Outputs: 46d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 47d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 xr[ ], reordered data 48d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 49d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 50d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber FUNCTION DESCRIPTION 51d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 52d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber If short blocks are used (block_type[gr][ch]=='10'), the rescaled data 53d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber xr[scf_band][window][freq_line] shall be reordered in polyphase subband 54d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber order, xr[subband][window][freq_line], prior to the IMDCT operation. 55d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 56d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 57d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REQUIREMENTS 58d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 59d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 60d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 61d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber REFERENCES 62d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber [1] ISO MPEG Audio Subgroup Software Simulation Group (1996) 63d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ISO 13818-3 MPEG-2 Audio Decoder - Lower Sampling Frequency Extension 64d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 65d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 66d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 67d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber PSEUDO-CODE 68d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 69d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber------------------------------------------------------------------------------ 70d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber*/ 71d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 72d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 73d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 74d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; INCLUDES 75d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 76d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pv_mp3dec_fxd_op.h" 77d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pvmp3_dec_defs.h" 78d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pvmp3_reorder.h" 79d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "pvmp3_tables.h" 80d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber#include "mp3_mem_funcs.h" 81d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 82d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 83d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; MACROS 84d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Define module specific macros here 85d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 86d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 87d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 88d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 89d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; DEFINES 90d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Include all pre-processor statements here. Include conditional 91d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; compile variables also. 92d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 93d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 94d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 95d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 96d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; LOCAL FUNCTION DEFINITIONS 97d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Function Prototype declaration 98d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 99d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 100d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 101d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; LOCAL STORE/BUFFER/POINTER DEFINITIONS 102d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Variable declaration - defined here and used outside this module 103d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 104d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 105d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 106d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; EXTERNAL FUNCTION REFERENCES 107d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Declare functions defined elsewhere and referenced in this module 108d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 109d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 110d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 111d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 112d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; Declare variables used in this module but defined elsewhere 113d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 114d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 115d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber/*---------------------------------------------------------------------------- 116d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber; FUNCTION CODE 117d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber----------------------------------------------------------------------------*/ 118d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 119d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Hubervoid pvmp3_reorder(int32 xr[SUBBANDS_NUMBER*FILTERBANK_BANDS], 120d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber granuleInfo *gr_info, 121d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 *used_freq_lines, 122d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber mp3Header *info, 123f4ea1f92bc56a8ffceddba0dbd3979fe0219b13cAndreas Huber int32 Scratch_mem[198]) 124d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber{ 125d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfreq = info->version_x + (info->version_x << 1); 126d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfreq += info->sampling_frequency; 127d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 128d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (gr_info->window_switching_flag && (gr_info->block_type == 2)) 129d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 130d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfb_lines; 131d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 freq; 132d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 src_line; 133d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 sfb; 134d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (gr_info->mixed_block_flag) 135d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 136d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber /* REORDERING FOR REST SWITCHED SHORT */ 137d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 3; /* no reorder for low 2 subbands */ 138d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber src_line = 36; 139d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 140d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 141d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { /* pure short */ 142d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 0; 143d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber src_line = 0; 144d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 145d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int16 ct = src_line; 146d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 147d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (; sfb < 13; sfb++) 148d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 149d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber if (*used_freq_lines > 3*mp3_sfBandIndex[sfreq].s[sfb+1]) 150d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 151d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb_lines = mp3_sfBandIndex[sfreq].s[sfb+1] - mp3_sfBandIndex[sfreq].s[sfb]; 152d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 153d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (freq = 0; freq < 3*sfb_lines; freq += 3) 154d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 155d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp1 = xr[src_line]; 156d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp2 = xr[src_line+(sfb_lines)]; 157d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp3 = xr[src_line+(sfb_lines<<1)]; 158d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber src_line++; 159d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Scratch_mem[freq ] = tmp1; 160d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Scratch_mem[freq+1] = tmp2; 161d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Scratch_mem[freq+2] = tmp3; 162d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 163d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber src_line += (sfb_lines << 1); 164d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 165d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pv_memcpy(&xr[ct], Scratch_mem, sfb_lines*3*sizeof(int32)); 166d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber ct += sfb_lines + (sfb_lines << 1); 167d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 168d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 169d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber else 170d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 171d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 172d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb_lines = mp3_sfBandIndex[sfreq].s[sfb+1] - mp3_sfBandIndex[sfreq].s[sfb]; 173d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 174d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber for (freq = 0; freq < 3*sfb_lines; freq += 3) 175d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber { 176d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp1 = xr[src_line]; 177d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp2 = xr[src_line+(sfb_lines)]; 178d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber int32 tmp3 = xr[src_line+(sfb_lines<<1)]; 179d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber src_line++; 180d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Scratch_mem[freq ] = tmp1; 181d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Scratch_mem[freq+1] = tmp2; 182d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber Scratch_mem[freq+2] = tmp3; 183d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 184d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 185d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber pv_memcpy(&xr[ct], Scratch_mem, sfb_lines*3*sizeof(int32)); 186d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 187d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber *used_freq_lines = mp3_sfBandIndex[sfreq].s[sfb+1] * 3; 188d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 189d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber sfb = 13; /* force out of the for-loop */ 190d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 191d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 192d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber } 193d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber} 194d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 195d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 196d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 197d9618f23226f46c752e56f712bc4b505117d8b4bAndreas Huber 198