1 /* ----------------------------------------------------------------------------- 2 Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4 Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Frderung der angewandten 5 Forschung e.V. All rights reserved. 6 7 1. INTRODUCTION 8 The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software 9 that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding 10 scheme for digital audio. This FDK AAC Codec software is intended to be used on 11 a wide variety of Android devices. 12 13 AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient 14 general perceptual audio codecs. AAC-ELD is considered the best-performing 15 full-bandwidth communications codec by independent studies and is widely 16 deployed. AAC has been standardized by ISO and IEC as part of the MPEG 17 specifications. 18 19 Patent licenses for necessary patent claims for the FDK AAC Codec (including 20 those of Fraunhofer) may be obtained through Via Licensing 21 (www.vialicensing.com) or through the respective patent owners individually for 22 the purpose of encoding or decoding bit streams in products that are compliant 23 with the ISO/IEC MPEG audio standards. Please note that most manufacturers of 24 Android devices already license these patent claims through Via Licensing or 25 directly from the patent owners, and therefore FDK AAC Codec software may 26 already be covered under those patent licenses when it is used for those 27 licensed purposes only. 28 29 Commercially-licensed AAC software libraries, including floating-point versions 30 with enhanced sound quality, are also available from Fraunhofer. Users are 31 encouraged to check the Fraunhofer website for additional applications 32 information and documentation. 33 34 2. COPYRIGHT LICENSE 35 36 Redistribution and use in source and binary forms, with or without modification, 37 are permitted without payment of copyright license fees provided that you 38 satisfy the following conditions: 39 40 You must retain the complete text of this software license in redistributions of 41 the FDK AAC Codec or your modifications thereto in source code form. 42 43 You must retain the complete text of this software license in the documentation 44 and/or other materials provided with redistributions of the FDK AAC Codec or 45 your modifications thereto in binary form. You must make available free of 46 charge copies of the complete source code of the FDK AAC Codec and your 47 modifications thereto to recipients of copies in binary form. 48 49 The name of Fraunhofer may not be used to endorse or promote products derived 50 from this library without prior written permission. 51 52 You may not charge copyright license fees for anyone to use, copy or distribute 53 the FDK AAC Codec software or your modifications thereto. 54 55 Your modified versions of the FDK AAC Codec must carry prominent notices stating 56 that you changed the software and the date of any change. For modified versions 57 of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" 58 must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK 59 AAC Codec Library for Android." 60 61 3. NO PATENT LICENSE 62 63 NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without 64 limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. 65 Fraunhofer provides no warranty of patent non-infringement with respect to this 66 software. 67 68 You may use this FDK AAC Codec software or modifications thereto only for 69 purposes that are authorized by appropriate patent licenses. 70 71 4. DISCLAIMER 72 73 This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright 74 holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 75 including but not limited to the implied warranties of merchantability and 76 fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 77 CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, 78 or consequential damages, including but not limited to procurement of substitute 79 goods or services; loss of use, data, or profits, or business interruption, 80 however caused and on any theory of liability, whether in contract, strict 81 liability, or tort (including negligence), arising in any way out of the use of 82 this software, even if advised of the possibility of such damage. 83 84 5. CONTACT INFORMATION 85 86 Fraunhofer Institute for Integrated Circuits IIS 87 Attention: Audio and Multimedia Departments - FDK AAC LL 88 Am Wolfsmantel 33 89 91058 Erlangen, Germany 90 91 www.iis.fraunhofer.de/amm 92 amm-info (at) iis.fraunhofer.de 93 ----------------------------------------------------------------------------- */ 94 95 /******************* MPEG transport format decoder library ********************* 96 97 Author(s): Josef Hoepfl 98 99 Description: DRM interface 100 101 *******************************************************************************/ 102 103 #ifndef TPDEC_DRM_H 104 #define TPDEC_DRM_H 105 106 #include "tpdec_lib.h" 107 108 #include "FDK_crc.h" 109 110 typedef struct { 111 FDK_CRCINFO crcInfo; /* CRC state info */ 112 USHORT crcReadValue; /* CRC value read from bitstream data */ 113 114 } STRUCT_DRM; 115 116 typedef STRUCT_DRM *HANDLE_DRM; 117 118 /*! 119 \brief Initialize DRM CRC 120 121 The function initialzes the crc buffer and the crc lookup table. 122 123 \return none 124 */ 125 void drmRead_CrcInit(HANDLE_DRM pDrm); 126 127 /** 128 * \brief Starts CRC region with a maximum number of bits 129 * If mBits is positive zero padding will be used for CRC calculation, if 130 * there are less than mBits bits available. If mBits is negative no zero 131 * padding is done. If mBits is zero the memory for the buffer is 132 * allocated dynamically, the number of bits is not limited. 133 * 134 * \param pDrm DRM data handle 135 * \param hBs bitstream handle, on which the CRC region referes to 136 * \param mBits max number of bits in crc region to be considered 137 * 138 * \return ID for the created region, -1 in case of an error 139 */ 140 int drmRead_CrcStartReg(HANDLE_DRM pDrm, HANDLE_FDK_BITSTREAM hBs, int mBits); 141 142 /** 143 * \brief Ends CRC region identified by reg 144 * 145 * \param pDrm DRM data handle 146 * \param hBs bitstream handle, on which the CRC region referes to 147 * \param reg CRC regions ID returned by drmRead_CrcStartReg() 148 * 149 * \return none 150 */ 151 void drmRead_CrcEndReg(HANDLE_DRM pDrm, HANDLE_FDK_BITSTREAM hBs, int reg); 152 153 /** 154 * \brief Check CRC 155 * 156 * Checks if the currently calculated CRC matches the CRC field read from the 157 * bitstream Deletes all CRC regions. 158 * 159 * \param pDrm DRM data handle 160 * 161 * \return Returns 0 if they are identical otherwise 1 162 */ 163 TRANSPORTDEC_ERROR drmRead_CrcCheck(HANDLE_DRM pDrm); 164 165 /** 166 * \brief Check if we have a valid DRM frame at the current bitbuffer position 167 * 168 * This function assumes enough bits in buffer for the current frame. 169 * It reads out the header bits to prepare the bitbuffer for the decode loop. 170 * In case the header bits show an invalid bitstream/frame, the whole frame is 171 * skipped. 172 * 173 * \param pDrm DRM data handle which is filled with parsed DRM header data 174 * \param bs handle of bitstream from whom the DRM header is read 175 * 176 * \return error status 177 */ 178 TRANSPORTDEC_ERROR drmRead_DecodeHeader(HANDLE_DRM pDrm, 179 HANDLE_FDK_BITSTREAM bs); 180 181 /** 182 * \brief Parse a Drm specific SDC audio config from a given bitstream handle. 183 * 184 * \param pAsc A pointer to an allocated 185 * CSAudioSpecificConfig struct. 186 * \param hBs Bitstream handle. 187 * \param cb A pointer to structure holding callback 188 * information Note: A NULL pointer for cb can be used to signal a "Check Config 189 * only functionality" 190 * \param configMode Config modes: memory allocation mode or 191 * config change detection mode 192 * \param configChanged Indicates a config change 193 * 194 * \return Total element count including all SCE, CPE and LFE. 195 */ 196 TRANSPORTDEC_ERROR DrmRawSdcAudioConfig_Parse(CSAudioSpecificConfig *pAsc, 197 HANDLE_FDK_BITSTREAM hBs, 198 CSTpCallBacks *cb, 199 const UCHAR configMode, 200 const UCHAR configChanged); 201 202 #endif /* TPDEC_DRM_H */ 203
