1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5� Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V. 6 All rights reserved. 7 8 1. INTRODUCTION 9The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 10the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 11This FDK AAC Codec software is intended to be used on a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 14audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 15independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 16of the MPEG specifications. 17 18Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 19may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 20individually for the purpose of encoding or decoding bit streams in products that are compliant with 21the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 22these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 23software may already be covered under those patent licenses when it is used for those licensed purposes only. 24 25Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 26are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 27applications information and documentation. 28 292. COPYRIGHT LICENSE 30 31Redistribution and use in source and binary forms, with or without modification, are permitted without 32payment of copyright license fees provided that you satisfy the following conditions: 33 34You must retain the complete text of this software license in redistributions of the FDK AAC Codec or 35your modifications thereto in source code form. 36 37You must retain the complete text of this software license in the documentation and/or other materials 38provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 39You must make available free of charge copies of the complete source code of the FDK AAC Codec and your 40modifications thereto to recipients of copies in binary form. 41 42The name of Fraunhofer may not be used to endorse or promote products derived from this library without 43prior written permission. 44 45You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 46software or your modifications thereto. 47 48Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 49and 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." 52 533. NO PATENT LICENSE 54 55NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 56ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 57respect to this software. 58 59You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 60by appropriate patent licenses. 61 624. DISCLAIMER 63 64This 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 66of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 67CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 68including but not limited to procurement of substitute goods or services; loss of use, data, or profits, 69or business interruption, however caused and on any theory of liability, whether in contract, strict 70liability, or tort (including negligence), arising in any way out of the use of this software, even if 71advised of the possibility of such damage. 72 735. CONTACT INFORMATION 74 75Fraunhofer Institute for Integrated Circuits IIS 76Attention: Audio and Multimedia Departments - FDK AAC LL 77Am Wolfsmantel 33 7891058 Erlangen, Germany 79 80www.iis.fraunhofer.de/amm 81amm-info@iis.fraunhofer.de 82----------------------------------------------------------------------------------------------------------- */ 83 84/***************************** MPEG-4 AAC Decoder ************************** 85 86 Author(s): Josef Hoepfl 87 Description: DRM interface 88 89******************************************************************************/ 90 91#ifndef TPDEC_DRM_H 92#define TPDEC_DRM_H 93 94#include "tpdec_lib.h" 95 96 97#include "FDK_crc.h" 98 99typedef struct { 100 101 FDK_CRCINFO crcInfo; /* CRC state info */ 102 USHORT crcReadValue; /* CRC value read from bitstream data */ 103 104} STRUCT_DRM; 105 106typedef STRUCT_DRM *HANDLE_DRM; 107 108/*! 109 \brief Initialize DRM CRC 110 111 The function initialzes the crc buffer and the crc lookup table. 112 113 \return none 114*/ 115void drmRead_CrcInit( HANDLE_DRM pDrm ); 116 117/** 118 * \brief Starts CRC region with a maximum number of bits 119 * If mBits is positive zero padding will be used for CRC calculation, if there 120 * are less than mBits bits available. 121 * If mBits is negative no zero padding is done. 122 * If mBits is zero the memory for the buffer is allocated dynamically, the 123 * number of bits is not limited. 124 * 125 * \param pDrm DRM data handle 126 * \param hBs bitstream handle, on which the CRC region referes to 127 * \param mBits max number of bits in crc region to be considered 128 * 129 * \return ID for the created region, -1 in case of an error 130 */ 131int drmRead_CrcStartReg( 132 HANDLE_DRM pDrm, 133 HANDLE_FDK_BITSTREAM hBs, 134 int mBits 135 ); 136 137/** 138 * \brief Ends CRC region identified by reg 139 * 140 * \param pDrm DRM data handle 141 * \param hBs bitstream handle, on which the CRC region referes to 142 * \param reg CRC regions ID returned by drmRead_CrcStartReg() 143 * 144 * \return none 145 */ 146void drmRead_CrcEndReg( 147 HANDLE_DRM pDrm, 148 HANDLE_FDK_BITSTREAM hBs, 149 int reg 150 ); 151 152/** 153 * \brief Check CRC 154 * 155 * Checks if the currently calculated CRC matches the CRC field read from the bitstream 156 * Deletes all CRC regions. 157 * 158 * \param pDrm DRM data handle 159 * 160 * \return Returns 0 if they are identical otherwise 1 161 */ 162TRANSPORTDEC_ERROR drmRead_CrcCheck( HANDLE_DRM pDrm ); 163 164/** 165 * \brief Check if we have a valid DRM frame at the current bitbuffer position 166 * 167 * This function assumes enough bits in buffer for the current frame. 168 * It reads out the header bits to prepare the bitbuffer for the decode loop. 169 * In case the header bits show an invalid bitstream/frame, the whole frame is skipped. 170 * 171 * \param pDrm DRM data handle which is filled with parsed DRM header data 172 * \param bs handle of bitstream from whom the DRM header is read 173 * 174 * \return error status 175 */ 176TRANSPORTDEC_ERROR drmRead_DecodeHeader( 177 HANDLE_DRM pDrm, 178 HANDLE_FDK_BITSTREAM bs 179 ); 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 CSAudioSpecificConfig struct. 185 * \param hBs Bitstream handle. 186 * 187 * \return Total element count including all SCE, CPE and LFE. 188 */ 189TRANSPORTDEC_ERROR DrmRawSdcAudioConfig_Parse( CSAudioSpecificConfig *pAsc, 190 HANDLE_FDK_BITSTREAM hBs ); 191 192 193 194#endif /* TPDEC_DRM_H */ 195