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 encoder library ********************* 96 97 Author(s): 98 99 Description: 100 101 *******************************************************************************/ 102 103 #ifndef TPENC_LATM_H 104 #define TPENC_LATM_H 105 106 #include "tpenc_lib.h" 107 #include "FDK_bitstream.h" 108 109 #define DEFAULT_LATM_NR_OF_SUBFRAMES 1 110 #define DEFAULT_LATM_SMC_REPEAT 8 111 112 #define MAX_AAC_LAYERS 9 113 114 #define LATM_MAX_PROGRAMS 1 115 #define LATM_MAX_STREAM_ID 16 116 117 #define LATM_MAX_LAYERS 1 /*MAX_AAC_LAYERS*/ 118 119 #define MAX_NR_OF_SUBFRAMES \ 120 2 /* set this carefully to avoid buffer overflows \ 121 */ 122 123 typedef enum { LATMVAR_SIMPLE_SEQUENCE } LATM_VAR_MODE; 124 125 typedef struct { 126 signed int frameLengthType; 127 signed int frameLengthBits; 128 signed int varFrameLengthTable[4]; 129 signed int streamID; 130 } LATM_LAYER_INFO; 131 132 typedef struct { 133 LATM_LAYER_INFO m_linfo[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS]; 134 CODER_CONFIG *config[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS]; 135 136 LATM_VAR_MODE varMode; 137 TRANSPORT_TYPE tt; 138 139 int audioMuxLengthBytes; 140 141 int audioMuxLengthBytesPos; 142 int taraBufferFullness; /* state of the bit reservoir */ 143 int varStreamCnt; 144 145 UCHAR 146 latmFrameCounter; /* Current frame number. Counts modulo muxConfigPeriod 147 */ 148 UCHAR muxConfigPeriod; /* Distance in frames between MuxConfig */ 149 150 UCHAR 151 audioMuxVersion; /* AMV1 supports transmission of taraBufferFullness and 152 ASC lengths */ 153 UCHAR audioMuxVersionA; /* for future extensions */ 154 155 UCHAR noProgram; 156 UCHAR noLayer[LATM_MAX_PROGRAMS]; 157 UCHAR fractDelayPresent; 158 159 UCHAR allStreamsSameTimeFraming; 160 UCHAR subFrameCnt; /* Current Subframe frame */ 161 UCHAR noSubframes; /* Number of subframes */ 162 UINT latmSubframeStart; /* Position of current subframe start */ 163 UCHAR noSubframes_next; 164 165 UCHAR otherDataLenBits; /* AudioMuxElement other data bits */ 166 UCHAR fillBits; /* AudioMuxElement fill bits */ 167 UINT streamMuxConfigBits; 168 169 } LATM_STREAM; 170 171 typedef LATM_STREAM *HANDLE_LATM_STREAM; 172 173 /** 174 * \brief Initialize LATM_STREAM Handle. Creates automatically one program with 175 * one layer with the given layerConfig. The layerConfig must be persisten 176 * because references to this pointer are made at any time again. Use 177 * transportEnc_Latm_AddLayer() to add more programs/layers. 178 * 179 * \param hLatmStreamInfo HANDLE_LATM_STREAM handle 180 * \param hBs Bitstream handle 181 * \param layerConfig a valid CODER_CONFIG struct containing the current audio 182 * configuration parameters 183 * \param audioMuxVersion the LATM audioMuxVersion to be used 184 * \param tt the specific TRANSPORT_TYPE to be used, either TT_MP4_LOAS, 185 * TT_MP4_LATM_MCP1 or TT_MP4_LATM_MCP0 LOAS 186 * \param cb callback information structure. 187 * 188 * \return an TRANSPORTENC_ERROR error code 189 */ 190 TRANSPORTENC_ERROR transportEnc_Latm_Init(HANDLE_LATM_STREAM hLatmStreamInfo, 191 HANDLE_FDK_BITSTREAM hBs, 192 CODER_CONFIG *layerConfig, 193 UINT audioMuxVersion, 194 TRANSPORT_TYPE tt, CSTpCallBacks *cb); 195 196 /** 197 * \brief Write addional other data bits in AudioMuxElement 198 * 199 * \param hAss HANDLE_LATM_STREAM handle 200 * \param otherDataBits number of other data bits to be written 201 * 202 * \return an TRANSPORTENC_ERROR error code 203 */ 204 TRANSPORTENC_ERROR transportEnc_LatmAddOtherDataBits(HANDLE_LATM_STREAM hAss, 205 const int otherDataBits); 206 207 /** 208 * \brief Get bit demand of next LATM/LOAS header 209 * 210 * \param hAss HANDLE_LATM_STREAM handle 211 * \param streamDataLength the length of the payload 212 * 213 * \return the number of bits required by the LATM/LOAS headers 214 */ 215 unsigned int transportEnc_LatmCountTotalBitDemandHeader( 216 HANDLE_LATM_STREAM hAss, unsigned int streamDataLength); 217 218 /** 219 * \brief Write LATM/LOAS header into given bitstream handle 220 * 221 * \param hLatmStreamInfo HANDLE_LATM_STREAM handle 222 * \param hBitstream Bitstream handle 223 * \param auBits amount of current payload bits 224 * \param bufferFullness LATM buffer fullness value 225 * \param cb callback information structure. 226 * 227 * \return an TRANSPORTENC_ERROR error code 228 */ 229 TRANSPORTENC_ERROR 230 transportEnc_LatmWrite(HANDLE_LATM_STREAM hAss, HANDLE_FDK_BITSTREAM hBitstream, 231 int auBits, int bufferFullness, CSTpCallBacks *cb); 232 233 /** 234 * \brief Adjust bit count relative to current subframe 235 * 236 * \param hAss HANDLE_LATM_STREAM handle 237 * \param pBits pointer to an int, where the current frame bit count is 238 * contained, and where the subframe relative bit count will be returned into 239 * 240 * \return void 241 */ 242 void transportEnc_LatmAdjustSubframeBits(HANDLE_LATM_STREAM hAss, int *pBits); 243 244 /** 245 * \brief Request an LATM frame, which may, or may not be available 246 * 247 * \param hAss HANDLE_LATM_STREAM handle 248 * \param hBs Bitstream handle 249 * \param pBytes pointer to an int, where the current frame byte count stored 250 * into. A return value of zero means that currently no LATM/LOAS frame can be 251 * returned. The latter is expected in case of multiple subframes being 252 * used. 253 * 254 * \return an TRANSPORTENC_ERROR error code 255 */ 256 TRANSPORTENC_ERROR transportEnc_LatmGetFrame(HANDLE_LATM_STREAM hAss, 257 HANDLE_FDK_BITSTREAM hBs, 258 int *pBytes); 259 260 /** 261 * \brief Write a StreamMuxConfig into the given bitstream handle 262 * 263 * \param hAss HANDLE_LATM_STREAM handle 264 * \param hBs Bitstream handle 265 * \param bufferFullness LATM buffer fullness value 266 * \param cb callback information structure. 267 * 268 * \return void 269 */ 270 TRANSPORTENC_ERROR 271 CreateStreamMuxConfig(HANDLE_LATM_STREAM hAss, HANDLE_FDK_BITSTREAM hBs, 272 int bufferFullness, CSTpCallBacks *cb); 273 274 #endif /* TPENC_LATM_H */ 275
