1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software License for The Fraunhofer FDK AAC Codec Library for Android 4 5 Copyright 1995 - 2013 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-4 AAC Encoder ************************** 85 86 Author(s): 87 Description: 88 89 ******************************************************************************/ 90 91 #ifndef TPENC_LATM_H 92 #define TPENC_LATM_H 93 94 95 96 #include "tpenc_lib.h" 97 #include "FDK_bitstream.h" 98 99 100 #define DEFAULT_LATM_NR_OF_SUBFRAMES 1 101 #define DEFAULT_LATM_SMC_REPEAT 8 102 103 #define MAX_AAC_LAYERS 9 104 105 #define LATM_MAX_PROGRAMS 1 106 #define LATM_MAX_STREAM_ID 16 107 108 #define LATM_MAX_LAYERS 1 /*MAX_AAC_LAYERS*/ 109 110 #define MAX_NR_OF_SUBFRAMES 2 /* set this carefully to avoid buffer overflows */ 111 112 typedef enum { LATMVAR_SIMPLE_SEQUENCE } LATM_VAR_MODE; 113 114 typedef struct { 115 signed int frameLengthType; 116 signed int frameLengthBits; 117 signed int varFrameLengthTable[4]; 118 signed int streamID; 119 } LATM_LAYER_INFO; 120 121 122 typedef struct { 123 LATM_LAYER_INFO m_linfo[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS]; 124 CODER_CONFIG *config[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS]; 125 126 LATM_VAR_MODE varMode; 127 TRANSPORT_TYPE tt; 128 129 int audioMuxLengthBytes; 130 131 int audioMuxLengthBytesPos; 132 int taraBufferFullness; /* state of the bit reservoir */ 133 int varStreamCnt; 134 unsigned int otherDataLenBytes; 135 136 UCHAR latmFrameCounter; /* Current frame number. Counts modulo muxConfigPeriod */ 137 UCHAR muxConfigPeriod; /* Distance in frames between MuxConfig */ 138 139 UCHAR audioMuxVersion; /* AMV1 supports transmission of taraBufferFullness and ASC lengths */ 140 UCHAR audioMuxVersionA; /* for future extensions */ 141 142 UCHAR noProgram; 143 UCHAR noLayer[LATM_MAX_PROGRAMS]; 144 UCHAR fractDelayPresent; 145 146 UCHAR allStreamsSameTimeFraming; 147 UCHAR subFrameCnt; /* Current Subframe frame */ 148 UCHAR noSubframes; /* Number of subframes */ 149 UINT latmSubframeStart; /* Position of current subframe start */ 150 UCHAR noSubframes_next; 151 152 UCHAR fillBits; /* AudioMuxElement fill bits */ 153 UCHAR streamMuxConfigBits; 154 155 } LATM_STREAM; 156 157 typedef LATM_STREAM *HANDLE_LATM_STREAM; 158 159 /** 160 * \brief Initialize LATM_STREAM Handle. Creates automatically one program with one layer with 161 * the given layerConfig. The layerConfig must be persisten because references to this pointer 162 * are made at any time again. 163 * Use transportEnc_Latm_AddLayer() to add more programs/layers. 164 * 165 * \param hLatmStreamInfo HANDLE_LATM_STREAM handle 166 * \param hBs Bitstream handle 167 * \param layerConfig a valid CODER_CONFIG struct containing the current audio configuration parameters 168 * \param audioMuxVersion the LATM audioMuxVersion to be used 169 * \param tt the specific TRANSPORT_TYPE to be used, either TT_MP4_LOAS, TT_MP4_LATM_MCP1 or TT_MP4_LATM_MCP0 LOAS 170 * \param cb callback information structure. 171 * 172 * \return an TRANSPORTENC_ERROR error code 173 */ 174 TRANSPORTENC_ERROR transportEnc_Latm_Init( 175 HANDLE_LATM_STREAM hLatmStreamInfo, 176 HANDLE_FDK_BITSTREAM hBs, 177 CODER_CONFIG *layerConfig, 178 UINT audioMuxVersion, 179 TRANSPORT_TYPE tt, 180 CSTpCallBacks *cb 181 ); 182 183 /** 184 * \brief Get bit demand of next LATM/LOAS header 185 * 186 * \param hAss HANDLE_LATM_STREAM handle 187 * \param streamDataLength the length of the payload 188 * 189 * \return the number of bits required by the LATM/LOAS headers 190 */ 191 unsigned int transportEnc_LatmCountTotalBitDemandHeader ( 192 HANDLE_LATM_STREAM hAss, 193 unsigned int streamDataLength 194 ); 195 196 /** 197 * \brief Write LATM/LOAS header into given bitstream handle 198 * 199 * \param hLatmStreamInfo HANDLE_LATM_STREAM handle 200 * \param hBitstream Bitstream handle 201 * \param auBits amount of current payload bits 202 * \param bufferFullness LATM buffer fullness value 203 * \param cb callback information structure. 204 * 205 * \return an TRANSPORTENC_ERROR error code 206 */ 207 TRANSPORTENC_ERROR 208 transportEnc_LatmWrite ( 209 HANDLE_LATM_STREAM hAss, 210 HANDLE_FDK_BITSTREAM hBitstream, 211 int auBits, 212 int bufferFullness, 213 CSTpCallBacks *cb 214 ); 215 216 /** 217 * \brief Adjust bit count relative to current subframe 218 * 219 * \param hAss HANDLE_LATM_STREAM handle 220 * \param pBits pointer to an int, where the current frame bit count is contained, 221 * and where the subframe relative bit count will be returned into 222 * 223 * \return void 224 */ 225 void transportEnc_LatmAdjustSubframeBits(HANDLE_LATM_STREAM hAss, 226 int *pBits); 227 228 /** 229 * \brief Request an LATM frame, which may, or may not be available 230 * 231 * \param hAss HANDLE_LATM_STREAM handle 232 * \param hBs Bitstream handle 233 * \param pBytes pointer to an int, where the current frame byte count stored into. 234 * A return value of zero means that currently no LATM/LOAS frame can be returned. 235 * The latter is expected in case of multiple subframes being used. 236 * 237 * \return void 238 */ 239 void transportEnc_LatmGetFrame( 240 HANDLE_LATM_STREAM hAss, 241 HANDLE_FDK_BITSTREAM hBs, 242 int *pBytes 243 ); 244 245 /** 246 * \brief Write a StreamMuxConfig into the given bitstream handle 247 * 248 * \param hAss HANDLE_LATM_STREAM handle 249 * \param hBs Bitstream handle 250 * \param bufferFullness LATM buffer fullness value 251 * \param cb callback information structure. 252 * 253 * \return void 254 */ 255 TRANSPORTENC_ERROR 256 CreateStreamMuxConfig( 257 HANDLE_LATM_STREAM hAss, 258 HANDLE_FDK_BITSTREAM hBs, 259 int bufferFullness, 260 CSTpCallBacks *cb 261 ); 262 263 264 #endif /* TPENC_LATM_H */ 265
