libSBRdec/src/sbr_ram.h

   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.
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  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
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  29 2.    COPYRIGHT LICENSE
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  31 Redistribution and use in source and binary forms, with or without modification, are permitted without
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  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.
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  38 provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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  40 modifications thereto to recipients of copies in binary form.
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  46 software or your modifications thereto.
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  56 ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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  59 You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
  60 by appropriate patent licenses.
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  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
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  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 #ifndef _SBR_RAM_H_
  90 #define _SBR_RAM_H_
  91
  92 #include "sbrdecoder.h"
  93
  94 #include "env_extr.h"
  95 #include "sbr_dec.h"
  96
  97
  98
  99 #define SBRDEC_MAX_CH_PER_ELEMENT  (2)
 100
 101 typedef struct
 102 {
 103   SBR_CHANNEL          *pSbrChannel[SBRDEC_MAX_CH_PER_ELEMENT];
 104   TRANSPOSER_SETTINGS   transposerSettings; /* Common transport settings for each individual channel of an element */
 105   HANDLE_FDK_BITSTREAM  hBs;
 106
 107   MP4_ELEMENT_ID        elementID;          /* Element ID set during initialization. Can be used for concealment */
 108   int                   nChannels;          /* Number of elements output channels (=2 in case of PS) */
 109
 110   UCHAR frameErrorFlag[(1)+1];  /* Frame error status (for every slot in the delay line).
 111                                                        Will be copied into header at the very beginning of decodeElement() routine. */
 112
 113   UCHAR useFrameSlot;          /* Index which defines which slot will be decoded/filled next (used with additional delay) */
 114   UCHAR useHeaderSlot[(1)+1];   /* Index array that provides the link between header and frame data
 115                                                        (important when processing with additional delay). */
 116 } SBR_DECODER_ELEMENT;
 117
 118
 119 struct SBR_DECODER_INSTANCE
 120 {
 121   SBR_DECODER_ELEMENT  *pSbrElement[(4)];
 122   SBR_HEADER_DATA       sbrHeader[(4)][(1)+1];      /* Sbr header for each individual channel of an element */
 123
 124   FIXP_DBL *workBuffer1;
 125   FIXP_DBL *workBuffer2;
 126
 127   HANDLE_PS_DEC  hParametricStereoDec;
 128
 129   /* Global parameters */
 130   AUDIO_OBJECT_TYPE coreCodec; /* AOT of core codec */
 131   int numSbrElements;
 132   int numSbrChannels;
 133   INT sampleRateIn;            /* SBR decoder input sampling rate; might be different than the transposer input sampling rate. */
 134   INT sampleRateOut;           /* Sampling rate of the SBR decoder output audio samples. */
 135   USHORT codecFrameSize;
 136   UCHAR synDownsampleFac;
 137   UCHAR numDelayFrames;        /* The current number of additional delay frames used for processing. */
 138
 139   UINT flags;
 140
 141 };
 142
 143 H_ALLOC_MEM(Ram_SbrDecElement, SBR_DECODER_ELEMENT)
 144 H_ALLOC_MEM(Ram_SbrDecChannel, SBR_CHANNEL)
 145 H_ALLOC_MEM(Ram_SbrDecoder, struct SBR_DECODER_INSTANCE)
 146
 147 H_ALLOC_MEM(Ram_sbr_QmfStatesSynthesis, FIXP_QSS)
 148 H_ALLOC_MEM(Ram_sbr_OverlapBuffer, FIXP_DBL)
 149
 150
 151 H_ALLOC_MEM(Ram_ps_dec, PS_DEC)
 152
 153
 154 H_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer1, FIXP_DBL)
 155 H_ALLOC_MEM_OVERLAY(Ram_SbrDecWorkBuffer2, FIXP_DBL)
 156
 157
 158 #endif /* _SBR_RAM_H_ */