1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Frderung 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 (at) iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /******************************** MPEG Audio Encoder ************************** 85 86 Initial author: Alex Groeschel 87 contents/description: ADTS Transport writer 88 89 ******************************************************************************/ 90 91 #ifndef TPENC_ADTS_H 92 #define TPENC_ADTS_H 93 94 95 96 #include "tp_data.h" 97 98 #include "FDK_crc.h" 99 100 typedef struct { 101 INT sample_freq; 102 CHANNEL_MODE channel_mode; 103 UCHAR decoderCanDoMpeg4; 104 UCHAR mpeg_id; 105 UCHAR layer; 106 UCHAR protection_absent; 107 UCHAR profile; 108 UCHAR sample_freq_index; 109 UCHAR private_bit; 110 UCHAR original; 111 UCHAR home; 112 UCHAR copyright_id; 113 UCHAR copyright_start; 114 USHORT frame_length; 115 UCHAR num_raw_blocks; 116 UCHAR BufferFullnesStartFlag; 117 int headerBits; /*!< Header bit demand for the current raw data block */ 118 int currentBlock; /*!< Index of current raw data block */ 119 int subFrameStartBit; /*!< Bit position where the current raw data block begins */ 120 FDK_CRCINFO crcInfo; 121 } STRUCT_ADTS; 122 123 typedef STRUCT_ADTS *HANDLE_ADTS; 124 125 /** 126 * \brief Initialize ADTS data structure 127 * 128 * \param hAdts ADTS data handle 129 * \param config a valid CODER_CONFIG struct from where the required 130 * information for the ADTS header is extrated from 131 * 132 * \return 0 in case of success. 133 */ 134 INT adtsWrite_Init( 135 HANDLE_ADTS hAdts, 136 CODER_CONFIG *config 137 ); 138 139 /** 140 * \brief Get the total bit overhead caused by ADTS 141 * 142 * \hAdts handle to ADTS data 143 * 144 * \return Amount of additional bits required for the current raw data block 145 */ 146 int adtsWrite_GetHeaderBits( HANDLE_ADTS hAdts ); 147 148 /** 149 * \brief Write an ADTS header into the given bitstream. May not write a header 150 * in case of multiple raw data blocks. 151 * 152 * \param hAdts ADTS data handle 153 * \param hBitStream bitstream handle into which the ADTS may be written into 154 * \param buffer_fullness the buffer fullness value for the ADTS header 155 * \param the current raw data block length 156 * 157 * \return 0 in case of success. 158 */ 159 INT adtsWrite_EncodeHeader( 160 HANDLE_ADTS hAdts, 161 HANDLE_FDK_BITSTREAM hBitStream, 162 int bufferFullness, 163 int frame_length 164 ); 165 /** 166 * \brief Finish a ADTS raw data block 167 * 168 * \param hAdts ADTS data handle 169 * \param hBs bitstream handle into which the ADTS may be written into 170 * \param pBits a pointer to a integer holding the current bitstream buffer bit count, 171 * which is corrected to the current raw data block boundary. 172 * 173 */ 174 void adtsWrite_EndRawDataBlock( 175 HANDLE_ADTS hAdts, 176 HANDLE_FDK_BITSTREAM hBs, 177 int *bits 178 ); 179 180 181 /** 182 * \brief Start CRC region with a maximum number of bits 183 * If mBits is positive zero padding will be used for CRC calculation, if there 184 * are less than mBits bits available. 185 * If mBits is negative no zero padding is done. 186 * If mBits is zero the memory for the buffer is allocated dynamically, the 187 * number of bits is not limited. 188 * 189 * \param pAdts ADTS data handle 190 * \param hBs bitstream handle of which the CRC region ends 191 * \param mBits limit of number of bits to be considered for the requested CRC region 192 * 193 * \return ID for the created region, -1 in case of an error 194 */ 195 int adtsWrite_CrcStartReg( 196 HANDLE_ADTS pAdts, 197 HANDLE_FDK_BITSTREAM hBs, 198 int mBits 199 ); 200 201 /** 202 * \brief Ends CRC region identified by reg 203 * 204 * \param pAdts ADTS data handle 205 * \param hBs bitstream handle of which the CRC region ends 206 * \param reg a CRC region ID returned previously by adtsWrite_CrcStartReg() 207 */ 208 void adtsWrite_CrcEndReg( 209 HANDLE_ADTS pAdts, 210 HANDLE_FDK_BITSTREAM hBs, 211 int reg 212 ); 213 214 215 216 217 #endif /* TPENC_ADTS_H */ 218 219
