1 2/* ----------------------------------------------------------------------------------------------------------- 3Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5� Copyright 1995 - 2013 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 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 100typedef 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 123typedef 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 */ 134INT 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 */ 146int 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 */ 159INT 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 */ 174void 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 */ 195int 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 */ 208void 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