1/* ----------------------------------------------------------------------------- 2Software License for The Fraunhofer FDK AAC Codec Library for Android 3 4© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten 5Forschung e.V. All rights reserved. 6 7 1. INTRODUCTION 8The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software 9that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding 10scheme for digital audio. This FDK AAC Codec software is intended to be used on 11a wide variety of Android devices. 12 13AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient 14general perceptual audio codecs. AAC-ELD is considered the best-performing 15full-bandwidth communications codec by independent studies and is widely 16deployed. AAC has been standardized by ISO and IEC as part of the MPEG 17specifications. 18 19Patent licenses for necessary patent claims for the FDK AAC Codec (including 20those of Fraunhofer) may be obtained through Via Licensing 21(www.vialicensing.com) or through the respective patent owners individually for 22the purpose of encoding or decoding bit streams in products that are compliant 23with the ISO/IEC MPEG audio standards. Please note that most manufacturers of 24Android devices already license these patent claims through Via Licensing or 25directly from the patent owners, and therefore FDK AAC Codec software may 26already be covered under those patent licenses when it is used for those 27licensed purposes only. 28 29Commercially-licensed AAC software libraries, including floating-point versions 30with enhanced sound quality, are also available from Fraunhofer. Users are 31encouraged to check the Fraunhofer website for additional applications 32information and documentation. 33 342. COPYRIGHT LICENSE 35 36Redistribution and use in source and binary forms, with or without modification, 37are permitted without payment of copyright license fees provided that you 38satisfy the following conditions: 39 40You must retain the complete text of this software license in redistributions of 41the FDK AAC Codec or your modifications thereto in source code form. 42 43You must retain the complete text of this software license in the documentation 44and/or other materials provided with redistributions of the FDK AAC Codec or 45your modifications thereto in binary form. You must make available free of 46charge copies of the complete source code of the FDK AAC Codec and your 47modifications thereto to recipients of copies in binary form. 48 49The name of Fraunhofer may not be used to endorse or promote products derived 50from this library without prior written permission. 51 52You may not charge copyright license fees for anyone to use, copy or distribute 53the FDK AAC Codec software or your modifications thereto. 54 55Your modified versions of the FDK AAC Codec must carry prominent notices stating 56that you changed the software and the date of any change. For modified versions 57of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" 58must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK 59AAC Codec Library for Android." 60 613. NO PATENT LICENSE 62 63NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without 64limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. 65Fraunhofer provides no warranty of patent non-infringement with respect to this 66software. 67 68You may use this FDK AAC Codec software or modifications thereto only for 69purposes that are authorized by appropriate patent licenses. 70 714. DISCLAIMER 72 73This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright 74holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, 75including but not limited to the implied warranties of merchantability and 76fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 77CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, 78or consequential damages, including but not limited to procurement of substitute 79goods or services; loss of use, data, or profits, or business interruption, 80however caused and on any theory of liability, whether in contract, strict 81liability, or tort (including negligence), arising in any way out of the use of 82this software, even if advised of the possibility of such damage. 83 845. CONTACT INFORMATION 85 86Fraunhofer Institute for Integrated Circuits IIS 87Attention: Audio and Multimedia Departments - FDK AAC LL 88Am Wolfsmantel 33 8991058 Erlangen, Germany 90 91www.iis.fraunhofer.de/amm 92amm-info@iis.fraunhofer.de 93----------------------------------------------------------------------------- */ 94 95/******************* MPEG transport format encoder library ********************* 96 97 Author(s): Alex Groeschel 98 99 Description: ADTS Transport writer 100 101*******************************************************************************/ 102 103#ifndef TPENC_ADTS_H 104#define TPENC_ADTS_H 105 106#include "tp_data.h" 107 108#include "FDK_crc.h" 109 110typedef struct { 111 INT sample_freq; 112 CHANNEL_MODE channel_mode; 113 UCHAR decoderCanDoMpeg4; 114 UCHAR mpeg_id; 115 UCHAR layer; 116 UCHAR protection_absent; 117 UCHAR profile; 118 UCHAR sample_freq_index; 119 UCHAR private_bit; 120 UCHAR original; 121 UCHAR home; 122 UCHAR copyright_id; 123 UCHAR copyright_start; 124 USHORT frame_length; 125 UCHAR num_raw_blocks; 126 UCHAR BufferFullnesStartFlag; 127 UCHAR channel_config_zero; 128 int headerBits; /*!< Header bit demand for the current raw data block */ 129 int currentBlock; /*!< Index of current raw data block */ 130 int subFrameStartBit; /*!< Bit position where the current raw data block 131 begins */ 132 FDK_CRCINFO crcInfo; 133} STRUCT_ADTS; 134 135typedef STRUCT_ADTS *HANDLE_ADTS; 136 137/** 138 * \brief Initialize ADTS data structure 139 * 140 * \param hAdts ADTS data handle 141 * \param config a valid CODER_CONFIG struct from where the required 142 * information for the ADTS header is extrated from 143 * 144 * \return 0 in case of success. 145 */ 146INT adtsWrite_Init(HANDLE_ADTS hAdts, CODER_CONFIG *config); 147 148/** 149 * \brief Get the total bit overhead caused by ADTS 150 * 151 * \hAdts handle to ADTS data 152 * 153 * \return Amount of additional bits required for the current raw data block 154 */ 155int adtsWrite_GetHeaderBits(HANDLE_ADTS hAdts); 156 157/** 158 * \brief Write an ADTS header into the given bitstream. May not write a header 159 * in case of multiple raw data blocks. 160 * 161 * \param hAdts ADTS data handle 162 * \param hBitStream bitstream handle into which the ADTS may be written into 163 * \param buffer_fullness the buffer fullness value for the ADTS header 164 * \param the current raw data block length 165 * 166 * \return 0 in case of success. 167 */ 168INT adtsWrite_EncodeHeader(HANDLE_ADTS hAdts, HANDLE_FDK_BITSTREAM hBitStream, 169 int bufferFullness, int frame_length); 170/** 171 * \brief Finish a ADTS raw data block 172 * 173 * \param hAdts ADTS data handle 174 * \param hBs bitstream handle into which the ADTS may be written into 175 * \param pBits a pointer to a integer holding the current bitstream buffer bit 176 * count, which is corrected to the current raw data block boundary. 177 * 178 */ 179void adtsWrite_EndRawDataBlock(HANDLE_ADTS hAdts, HANDLE_FDK_BITSTREAM hBs, 180 int *bits); 181 182/** 183 * \brief Start CRC region with a maximum number of bits 184 * If mBits is positive zero padding will be used for CRC calculation, if 185 * there are less than mBits bits available. If mBits is negative no zero 186 * padding is done. If mBits is zero the memory for the buffer is 187 * allocated dynamically, the 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 192 * region 193 * 194 * \return ID for the created region, -1 in case of an error 195 */ 196int adtsWrite_CrcStartReg(HANDLE_ADTS pAdts, HANDLE_FDK_BITSTREAM hBs, 197 int mBits); 198 199/** 200 * \brief Ends CRC region identified by reg 201 * 202 * \param pAdts ADTS data handle 203 * \param hBs bitstream handle of which the CRC region ends 204 * \param reg a CRC region ID returned previously by adtsWrite_CrcStartReg() 205 */ 206void adtsWrite_CrcEndReg(HANDLE_ADTS pAdts, HANDLE_FDK_BITSTREAM hBs, int reg); 207 208#endif /* TPENC_ADTS_H */ 209