libSBRdec/src/sbr_ram.cpp

   1
   2 /* -----------------------------------------------------------------------------------------------------------
   3 Software License for The Fraunhofer FDK AAC Codec Library for Android
   4
   5 © Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
   6   All rights reserved.
   7
   8  1.    INTRODUCTION
   9 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
  10 the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
  11 This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
  12
  13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
  14 audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
  15 independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
  16 of the MPEG specifications.
  17
  18 Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
  19 may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
  20 individually for the purpose of encoding or decoding bit streams in products that are compliant with
  21 the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
  22 these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
  23 software may already be covered under those patent licenses when it is used for those licensed purposes only.
  24
  25 Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
  26 are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
  27 applications information and documentation.
  28
  29 2.    COPYRIGHT LICENSE
  30
  31 Redistribution and use in source and binary forms, with or without modification, are permitted without
  32 payment of copyright license fees provided that you satisfy the following conditions:
  33
  34 You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
  35 your modifications thereto in source code form.
  36
  37 You must retain the complete text of this software license in the documentation and/or other materials
  38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
  39 You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
  40 modifications thereto to recipients of copies in binary form.
  41
  42 The name of Fraunhofer may not be used to endorse or promote products derived from this library without
  43 prior written permission.
  44
  45 You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
  46 software or your modifications thereto.
  47
  48 Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
  49 and the date of any change. For modified versions of the FDK AAC Codec, the term
  50 "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
  51 "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
  52
  53 3.    NO PATENT LICENSE
  54
  55 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
  56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
  57 respect to this software.
  58
  59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
  60 by appropriate patent licenses.
  61
  62 4.    DISCLAIMER
  63
  64 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
  65 "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
  66 of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
  67 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
  68 including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
  69 or business interruption, however caused and on any theory of liability, whether in contract, strict
  70 liability, or tort (including negligence), arising in any way out of the use of this software, even if
  71 advised of the possibility of such damage.
  72
  73 5.    CONTACT INFORMATION
  74
  75 Fraunhofer Institute for Integrated Circuits IIS
  76 Attention: Audio and Multimedia Departments - FDK AAC LL
  77 Am Wolfsmantel 33
  78 91058 Erlangen, Germany
  79
  80 www.iis.fraunhofer.de/amm
  81 amm-info@iis.fraunhofer.de
  82 ----------------------------------------------------------------------------------------------------------- */
  83
  84 /*!
  85   \file
  86   \brief Memory layout
  87
  88
  89   This module declares all static and dynamic memory spaces
  90 */
  91
  92 #include "sbr_ram.h"
  93
  94
  95
  96
  97 #define WORKBUFFER1_TAG 0
  98 #define WORKBUFFER2_TAG 1
  99
 100 /*!
 101   \name StaticSbrData
 102
 103   Static memory areas, must not be overwritten in other sections of the decoder
 104 */
 105 /* @{ */
 106
 107 /*! SBR Decoder main structure */
 108 C_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE, 1)
 109 /*! SBR Decoder element data  <br>
 110   Dimension: (4) */
 111 C_ALLOC_MEM2(Ram_SbrDecElement, SBR_DECODER_ELEMENT, 1, (4))
 112 /*! SBR Decoder individual channel data  <br>
 113   Dimension: (6) */
 114 C_ALLOC_MEM2(Ram_SbrDecChannel, SBR_CHANNEL, 1, (6)+1)
 115
 116 /*! Filter states for QMF-synthesis.  <br>
 117   Dimension: #(6) * (#QMF_FILTER_STATE_SYN_SIZE-#(64)) */
 118 C_AALLOC_MEM2_L(Ram_sbr_QmfStatesSynthesis, FIXP_QSS, (640)-(64), (6)+1, SECT_DATA_L1)
 119
 120 /*! Delayed spectral data needed for the dynamic framing of SBR.
 121   For mp3PRO, 1/3 of a frame is buffered (#(6) 6) */
 122 C_AALLOC_MEM2(Ram_sbr_OverlapBuffer, FIXP_DBL, 2 * (6) * (64), (6)+1)
 123
 124 /*! Static Data of PS */
 125
 126 C_ALLOC_MEM(Ram_ps_dec, PS_DEC, 1)
 127
 128
 129 /* @} */
 130
 131
 132 /*!
 133   \name DynamicSbrData
 134
 135   Dynamic memory areas, might be reused in other algorithm sections,
 136   e.g. the core decoder
 137   <br>
 138   Depending on the mode set by DONT_USE_CORE_WORKBUFFER, workbuffers are
 139   defined additionally to the CoreWorkbuffer.
 140   <br>
 141   The size of WorkBuffers is ((1024)/(32))*(64) = 2048.
 142   <br>
 143   WorkBuffer2 is a pointer to the CoreWorkBuffer wich is reused here in the SBR part. In case of
 144   DONT_USE_CORE_WORKBUFFER, the CoreWorkbuffer is not used and the according
 145   Workbuffer2 is defined locally in this file.
 146   <br>
 147   WorkBuffer1 is reused in the AAC core (-> aacdecoder.cpp, aac_ram.cpp)
 148   <br>
 149
 150   Use of WorkBuffers:
 151   <pre>
 152
 153     -------------------------------------------------------------
 154     AAC core:
 155
 156       CoreWorkbuffer: spectral coefficients
 157       WorkBuffer1:    CAacDecoderChannelInfo, CAacDecoderDynamicData
 158
 159     -------------------------------------------------------------
 160     SBR part:
 161       ----------------------------------------------
 162       Low Power Mode (useLP=1 or LOW_POWER_SBR_ONLY), see assignLcTimeSlots()
 163
 164         SLOT_BASED_PROTOTYPE_SYN_FILTER
 165
 166         WorkBuffer1                                WorkBuffer2(=CoreWorkbuffer)
 167          ________________                           ________________
 168         | RealLeft       |                         | RealRight      |
 169         |________________|                         |________________|
 170
 171       ----------------------------------------------
 172       High Quality Mode (!LOW_POWER_SBR_ONLY and useLP=0), see assignHqTimeSlots()
 173
 174          SLOTBASED_PS
 175
 176          WorkBuffer1                                WorkBuffer2(=CoreWorkbuffer)
 177          ________________                           ________________
 178         | Real/Imag      |  interleaved            | Real/Imag      |  interleaved
 179         |________________|  first half actual ch   |________________|  second half actual ch
 180
 181     -------------------------------------------------------------
 182
 183   </pre>
 184
 185 */
 186 /* @{ */
 187 C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer1, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L1, WORKBUFFER1_TAG)
 188 C_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer2, FIXP_DBL, ((1024)/(32))*(64), SECT_DATA_L2, WORKBUFFER2_TAG)
 189
 190 /* @} */
 191
 192
 193
 194