1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 /* 19 20 Filename: ps_applied.c 21 22 ------------------------------------------------------------------------------ 23 REVISION HISTORY 24 25 26 Who: Date: MM/DD/YYYY 27 Description: 28 29 ------------------------------------------------------------------------------ 30 INPUT AND OUTPUT DEFINITIONS 31 32 33 34 ------------------------------------------------------------------------------ 35 FUNCTION DESCRIPTION 36 37 Applies Parametric Stereo Tool to a QMF-analized mono signal 38 providing a stereo image as output 39 40 41 _______ ________ 42 | | _______ | | 43 ->|Hybrid | LF ---- | |->| Hybrid |--> 44 | Anal. | | | | | Synth | QMF -> L 45 ------- o----------------------->| | -------- Synth 46 QMF | s_k(n) |Stereo |--------------> 47 Anal. -------------------------->| | 48 _______ | | | | ________ 49 | | HF --o | ----------- |Process| | | 50 ->| Delay | | ->| |-------->| |->| Hybrid |--> 51 ------- | |decorrelate| d_k(n) | | | Synth | QMF -> R 52 ---->| |-------->| | -------- Synth 53 ----------- |_______|--------------> 54 55 56 ------------------------------------------------------------------------------ 57 REQUIREMENTS 58 59 60 ------------------------------------------------------------------------------ 61 REFERENCES 62 63 SC 29 Software Copyright Licencing Disclaimer: 64 65 This software module was originally developed by 66 Coding Technologies 67 68 and edited by 69 - 70 71 in the course of development of the ISO/IEC 13818-7 and ISO/IEC 14496-3 72 standards for reference purposes and its performance may not have been 73 optimized. This software module is an implementation of one or more tools as 74 specified by the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards. 75 ISO/IEC gives users free license to this software module or modifications 76 thereof for use in products claiming conformance to audiovisual and 77 image-coding related ITU Recommendations and/or ISO/IEC International 78 Standards. ISO/IEC gives users the same free license to this software module or 79 modifications thereof for research purposes and further ISO/IEC standardisation. 80 Those intending to use this software module in products are advised that its 81 use may infringe existing patents. ISO/IEC have no liability for use of this 82 software module or modifications thereof. Copyright is not released for 83 products that do not conform to audiovisual and image-coding related ITU 84 Recommendations and/or ISO/IEC International Standards. 85 The original developer retains full right to modify and use the code for its 86 own purpose, assign or donate the code to a third party and to inhibit third 87 parties from using the code for products that do not conform to audiovisual and 88 image-coding related ITU Recommendations and/or ISO/IEC International Standards. 89 This copyright notice must be included in all copies or derivative works. 90 Copyright (c) ISO/IEC 2003. 91 92 ------------------------------------------------------------------------------ 93 PSEUDO-CODE 94 95 ------------------------------------------------------------------------------ 96 */ 97 98 99 /*---------------------------------------------------------------------------- 100 ; INCLUDES 101 ----------------------------------------------------------------------------*/ 102 103 #ifdef AAC_PLUS 104 105 #ifdef PARAMETRICSTEREO 106 #include "aac_mem_funcs.h" 107 #include "ps_stereo_processing.h" 108 #include "ps_decorrelate.h" 109 #include "ps_hybrid_synthesis.h" 110 #include "ps_hybrid_analysis.h" 111 #include "ps_applied.h" 112 113 /*---------------------------------------------------------------------------- 114 ; MACROS 115 ; Define module specific macros here 116 ----------------------------------------------------------------------------*/ 117 118 119 /*---------------------------------------------------------------------------- 120 ; DEFINES 121 ; Include all pre-processor statements here. Include conditional 122 ; compile variables also. 123 ----------------------------------------------------------------------------*/ 124 125 /*---------------------------------------------------------------------------- 126 ; LOCAL FUNCTION DEFINITIONS 127 ; Function Prototype declaration 128 ----------------------------------------------------------------------------*/ 129 130 /*---------------------------------------------------------------------------- 131 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS 132 ; Variable declaration - defined here and used outside this module 133 ----------------------------------------------------------------------------*/ 134 135 /*---------------------------------------------------------------------------- 136 ; EXTERNAL FUNCTION REFERENCES 137 ; Declare functions defined elsewhere and referenced in this module 138 ----------------------------------------------------------------------------*/ 139 140 /*---------------------------------------------------------------------------- 141 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES 142 ; Declare variables used in this module but defined elsewhere 143 ----------------------------------------------------------------------------*/ 144 145 146 /*---------------------------------------------------------------------------- 147 ; FUNCTION CODE 148 ----------------------------------------------------------------------------*/ 149 150 void ps_applied(STRUCT_PS_DEC *h_ps_dec, 151 Int32 rIntBufferLeft[][64], 152 Int32 iIntBufferLeft[][64], 153 Int32 *rIntBufferRight, 154 Int32 *iIntBufferRight, 155 Int32 scratch_mem[], 156 Int32 band) 157 158 { 159 160 /* 161 * Get higher frequency resolution in the lower QMF subbands 162 * creating sub-subbands 163 */ 164 ps_hybrid_analysis(rIntBufferLeft, 165 iIntBufferLeft, 166 h_ps_dec->mHybridRealLeft, 167 h_ps_dec->mHybridImagLeft, 168 h_ps_dec->hHybrid, 169 scratch_mem, 170 band); 171 172 /* 173 * By means of delaying and all-pass filtering, sub-subbands of 174 * left ch. are decorrelate to creates right ch. sub-subbands 175 */ 176 177 ps_decorrelate(h_ps_dec, 178 *rIntBufferLeft, 179 *iIntBufferLeft, 180 rIntBufferRight, 181 iIntBufferRight, 182 scratch_mem); 183 184 /* 185 * sub-subbands of left and right ch. are processed according to 186 * stereo clues. 187 */ 188 189 ps_stereo_processing(h_ps_dec, 190 *rIntBufferLeft, 191 *iIntBufferLeft, 192 rIntBufferRight, 193 iIntBufferRight); 194 195 /* 196 * Reconstruct stereo signals 197 */ 198 199 ps_hybrid_synthesis((const Int32*)h_ps_dec->mHybridRealLeft, 200 (const Int32*)h_ps_dec->mHybridImagLeft, 201 *rIntBufferLeft, 202 *iIntBufferLeft, 203 h_ps_dec->hHybrid); 204 205 ps_hybrid_synthesis((const Int32*)h_ps_dec->mHybridRealRight, 206 (const Int32*)h_ps_dec->mHybridImagRight, 207 rIntBufferRight, 208 iIntBufferRight, 209 h_ps_dec->hHybrid); 210 211 }/* END ps_applied */ 212 #endif 213 214 215 #endif 216 217
