1 2 /* ----------------------------------------------------------------------------------------------------------- 3 Software 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 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@iis.fraunhofer.de 82 ----------------------------------------------------------------------------------------------------------- */ 83 84 /************************ Fraunhofer IIS SBR decoder library ****************** 85 86 Author(s): 87 Description: SBR decoder front-end prototypes and definitions. 88 89 ******************************************************************************/ 90 91 #ifndef __SBRDECODER_H 92 #define __SBRDECODER_H 93 94 #include "common_fix.h" 95 96 #include "FDK_bitstream.h" 97 #include "FDK_audio.h" 98 99 100 #define SBR_DEBUG_EXTHLP "\ 101 --- SBR ---\n\ 102 0x00000010 Ancillary data and SBR-Header\n\ 103 0x00000020 SBR-Side info\n\ 104 0x00000040 Decoded SBR-bitstream data, e.g. envelope data\n\ 105 0x00000080 SBR-Bitstream statistics\n\ 106 0x00000100 Miscellaneous SBR-messages\n\ 107 0x00000200 SBR-Energies and gains in the adjustor\n\ 108 0x00000400 Fatal SBR errors\n\ 109 0x00000800 Transposer coefficients for inverse filtering\n\ 110 " 111 112 /* Capability flags */ 113 #define CAPF_SBR_LP 0x00000001 /*!< Flag indicating library's capability of Low Power mode. */ 114 #define CAPF_SBR_HQ 0x00000002 /*!< Flag indicating library's capability of High Quality mode. */ 115 #define CAPF_SBR_DRM_BS 0x00000004 /*!< Flag indicating library's capability to decode DRM SBR data. */ 116 #define CAPF_SBR_CONCEALMENT 0x00000008 /*!< Flag indicating library's capability to conceal erroneous frames. */ 117 #define CAPF_SBR_DRC 0x00000010 /*!< Flag indicating library's capability for Dynamic Range Control. */ 118 #define CAPF_SBR_PS_MPEG 0x00000020 /*!< Flag indicating library's capability to do MPEG Parametric Stereo. */ 119 #define CAPF_SBR_PS_DRM 0x00000040 /*!< Flag indicating library's capability to do DRM Parametric Stereo. */ 120 121 typedef enum 122 { 123 SBRDEC_OK = 0, /*!< All fine. */ 124 /* SBRDEC_CONCEAL, */ 125 /* SBRDEC_NOSYNCH, */ 126 /* SBRDEC_ILLEGAL_PROGRAM, */ 127 /* SBRDEC_ILLEGAL_TAG, */ 128 /* SBRDEC_ILLEGAL_CHN_CONFIG, */ 129 /* SBRDEC_ILLEGAL_SECTION, */ 130 /* SBRDEC_ILLEGAL_SCFACTORS, */ 131 /* SBRDEC_ILLEGAL_PULSE_DATA, */ 132 /* SBRDEC_MAIN_PROFILE_NOT_IMPLEMENTED, */ 133 /* SBRDEC_GC_NOT_IMPLEMENTED, */ 134 /* SBRDEC_ILLEGAL_PLUS_ELE_ID, */ 135 SBRDEC_CREATE_ERROR, /*!< */ 136 SBRDEC_NOT_INITIALIZED, /*!< */ 137 SBRDEC_MEM_ALLOC_FAILED, /*!< Memory allocation failed. Probably not enough memory available. */ 138 SBRDEC_PARSE_ERROR, /*!< */ 139 SBRDEC_UNSUPPORTED_CONFIG, /*!< */ 140 SBRDEC_SET_PARAM_FAIL /*!< */ 141 } SBR_ERROR; 142 143 typedef enum 144 { 145 SBR_SYSTEM_BITSTREAM_DELAY, /*!< System: Switch to enable an additional SBR bitstream delay of one frame. */ 146 SBR_QMF_MODE, /*!< Set QMF mode, either complex or low power. */ 147 SBR_LD_QMF_TIME_ALIGN, /*!< Set QMF type, either LD-MPS or CLDFB. Relevant for ELD streams only. */ 148 SBR_FLUSH_DATA, /*!< Set internal state to flush the decoder with the next process call. */ 149 SBR_CLEAR_HISTORY, /*!< Clear all internal states (delay lines, QMF states, ...). */ 150 SBR_BS_INTERRUPTION /*!< Signal bit stream interruption. Value is ignored. */ 151 } SBRDEC_PARAM; 152 153 typedef struct SBR_DECODER_INSTANCE *HANDLE_SBRDECODER; 154 155 156 #ifdef __cplusplus 157 extern "C" 158 { 159 #endif 160 161 162 /** 163 * \brief Allocates and initializes one SBR decoder instance. 164 * \param pSelf Pointer to where a SBR decoder handle is copied into. 165 * \return Error code. 166 */ 167 SBR_ERROR sbrDecoder_Open ( HANDLE_SBRDECODER *pSelf ); 168 169 /** 170 * \brief Initialize a SBR decoder runtime instance. Must be called before decoding starts. 171 * 172 * \param self Handle to a SBR decoder instance. 173 * \param sampleRateIn Input samplerate of the SBR decoder instance. 174 * \param sampleRateOut Output samplerate of the SBR decoder instance. 175 * \param samplesPerFrame Number of samples per frames. 176 * \param coreCodec Audio Object Type (AOT) of the core codec. 177 * \param elementID Table with MPEG-4 element Ids in canonical order. 178 * \param forceReset Flag that enforces a complete decoder reset. 179 * 180 * \return Error code. 181 */ 182 SBR_ERROR sbrDecoder_InitElement ( 183 HANDLE_SBRDECODER self, 184 const int sampleRateIn, 185 const int sampleRateOut, 186 const int samplesPerFrame, 187 const AUDIO_OBJECT_TYPE coreCodec, 188 const MP4_ELEMENT_ID elementID, 189 const int elementIndex 190 ); 191 192 /** 193 * \brief pass out of band SBR header to SBR decoder 194 * 195 * \param self Handle to a SBR decoder instance. 196 * \param hBs bit stream handle data source. 197 * \param elementID SBR element ID. 198 * \param elementIndex SBR element index. 199 * 200 * \return Error code. 201 */ 202 INT sbrDecoder_Header ( 203 HANDLE_SBRDECODER self, 204 HANDLE_FDK_BITSTREAM hBs, 205 const INT sampleRateIn, 206 const INT sampleRateOut, 207 const INT samplesPerFrame, 208 const AUDIO_OBJECT_TYPE coreCodec, 209 const MP4_ELEMENT_ID elementID, 210 const INT elementIndex 211 ); 212 213 /** 214 * \brief Set a parameter of the SBR decoder runtime instance. 215 * \param self SBR decoder handle. 216 * \param param Parameter which will be set if successfull. 217 * \param value New parameter value. 218 * \return Error code. 219 */ 220 SBR_ERROR sbrDecoder_SetParam ( HANDLE_SBRDECODER self, 221 const SBRDEC_PARAM param, 222 const INT value ); 223 224 /** 225 * \brief Feed DRC channel data into a SBR decoder runtime instance. 226 * 227 * \param self SBR decoder handle. 228 * \param ch Channel number to which the DRC data is associated to. 229 * \param numBands Number of DRC bands. 230 * \param pNextFact_mag Pointer to a table with the DRC factor magnitudes. 231 * \param nextFact_exp Exponent for all DRC factors. 232 * \param drcInterpolationScheme DRC interpolation scheme. 233 * \param winSequence Window sequence from core coder (eight short or one long window). 234 * \param pBandTop Pointer to a table with the top borders for all DRC bands. 235 * 236 * \return Error code. 237 */ 238 SBR_ERROR sbrDecoder_drcFeedChannel ( HANDLE_SBRDECODER self, 239 INT ch, 240 UINT numBands, 241 FIXP_DBL *pNextFact_mag, 242 INT nextFact_exp, 243 SHORT drcInterpolationScheme, 244 UCHAR winSequence, 245 USHORT *pBandTop ); 246 247 /** 248 * \brief Disable SBR DRC for a certain channel. 249 * 250 * \param hSbrDecoder SBR decoder handle. 251 * \param ch Number of the channel that has to be disabled. 252 * 253 * \return None. 254 */ 255 void sbrDecoder_drcDisable ( HANDLE_SBRDECODER self, 256 INT ch ); 257 258 259 /** 260 * \brief Parse one SBR element data extension data block. The bit stream position will 261 * be placed at the end of the SBR payload block. The remaining bits will be returned 262 * into *count if a payload length is given (byPayLen > 0). If no SBR payload length is 263 * given (bsPayLen < 0) then the bit stream position on return will be random after this 264 * function call in case of errors, and any further decoding will be completely pointless. 265 * 266 * \param self SBR decoder handle. 267 * \param hBs Bit stream handle as data source. 268 * \param count Pointer to an integer where the amount of parsed SBR payload bits is stored into. 269 * \param bsPayLen If > 0 this value is the SBR payload length. If < 0, the SBR payload length is unknown. 270 * \param flags CRC flag (0: EXT_SBR_DATA; 1: EXT_SBR_DATA_CRC) 271 * \param prev_element Previous MPEG-4 element ID. 272 * \param element_index Index of the current element. 273 * 274 * \return Error code. 275 */ 276 SBR_ERROR sbrDecoder_Parse ( 277 HANDLE_SBRDECODER self, 278 HANDLE_FDK_BITSTREAM hBs, 279 int *count, 280 int bsPayLen, 281 int crcFlag, 282 MP4_ELEMENT_ID prev_element, 283 int element_index, 284 int fGlobalIndependencyFlag 285 ); 286 287 /** 288 * \brief This function decodes the given SBR bitstreams and applies SBR to the given time data. 289 * 290 * SBR-processing works InPlace. I.e. the calling function has to provide 291 * a time domain buffer timeData which can hold the completely decoded 292 * result. 293 * 294 * Left and right channel are read and stored according to the 295 * interleaving flag, frame length and number of channels. 296 * 297 * \param self Handle of an open SBR decoder instance. 298 * \param hSbrBs SBR Bitstream handle. 299 * \param timeData Pointer to input and finally upsampled output data. 300 * \param numChannels Pointer to a buffer holding the number of channels in time data buffer. 301 * \param sampleRate Output samplerate. 302 * \param channelMapping Channel mapping indices. 303 * \param interleaved Flag indicating if time data is stored interleaved (1: Interleaved time data, 0: non-interleaved timedata). 304 * \param coreDecodedOk Flag indicating if the core decoder did not find any error (0: core decoder found errors, 1: no errors). 305 * \param psDecoded Pointer to a buffer holding a flag. Input: PS is possible, Output: PS has been rendered. 306 * 307 * \return Error code. 308 */ 309 SBR_ERROR sbrDecoder_Apply ( HANDLE_SBRDECODER self, 310 INT_PCM *timeData, 311 int *numChannels, 312 int *sampleRate, 313 const UCHAR channelMapping[(8)], 314 const int interleaved, 315 const int coreDecodedOk, 316 UCHAR *psDecoded ); 317 318 319 /** 320 * \brief Close SBR decoder instance and free memory. 321 * \param self SBR decoder handle. 322 * \return Error Code. 323 */ 324 SBR_ERROR sbrDecoder_Close ( HANDLE_SBRDECODER *self ); 325 326 327 /** 328 * \brief Get SBR decoder library information. 329 * \param info Pointer to a LIB_INFO struct, where library information is written to. 330 * \return 0 on success, -1 if invalid handle or if no free element is available to write information to. 331 */ 332 INT sbrDecoder_GetLibInfo( LIB_INFO *info ); 333 334 /** 335 * \brief Determine the modules output signal delay in samples. 336 * \param self SBR decoder handle. 337 * \return The number of samples signal delay added by the module. 338 */ 339 UINT sbrDecoder_GetDelay( const HANDLE_SBRDECODER self ); 340 341 342 #ifdef __cplusplus 343 } 344 #endif 345 346 #endif 347