/* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android © Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. All rights reserved. 1. INTRODUCTION The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. This FDK AAC Codec software is intended to be used on a wide variety of Android devices. AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part of the MPEG specifications. Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners individually for the purpose of encoding or decoding bit streams in products that are compliant with the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec software may already be covered under those patent licenses when it is used for those licensed purposes only. Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional applications information and documentation. 2. COPYRIGHT LICENSE Redistribution and use in source and binary forms, with or without modification, are permitted without payment of copyright license fees provided that you satisfy the following conditions: You must retain the complete text of this software license in redistributions of the FDK AAC Codec or your modifications thereto in source code form. You must retain the complete text of this software license in the documentation and/or other materials provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. You must make available free of charge copies of the complete source code of the FDK AAC Codec and your modifications thereto to recipients of copies in binary form. The name of Fraunhofer may not be used to endorse or promote products derived from this library without prior written permission. You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec software or your modifications thereto. Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software and the date of any change. For modified versions of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 3. NO PATENT LICENSE NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with respect to this software. You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized by appropriate patent licenses. 4. DISCLAIMER This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, including but not limited to procurement of substitute goods or services; loss of use, data, or profits, or business interruption, however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence), arising in any way out of the use of this software, even if advised of the possibility of such damage. 5. CONTACT INFORMATION Fraunhofer Institute for Integrated Circuits IIS Attention: Audio and Multimedia Departments - FDK AAC LL Am Wolfsmantel 33 91058 Erlangen, Germany www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ----------------------------------------------------------------------------- */ /*********************** MPEG surround decoder library ************************* Author(s): Description: SAC Decoder Library Interface *******************************************************************************/ #ifndef SAC_DEC_INTERFACE_H #define SAC_DEC_INTERFACE_H #include "common_fix.h" #include "FDK_audio.h" #ifdef __cplusplus extern "C" { #endif #include "sac_dec_errorcodes.h" #include "sac_dec_ssc_struct.h" /** * \brief Baseline MPEG-Surround profile Level 1-5. */ typedef enum { DECODER_LEVEL_0 = 0, /*!< Level 0: dummy level; 212 only */ DECODER_LEVEL_6 = 6 /*!< Level 6: no support */ } CFG_LEVEL; /* * \brief Number of output channels restriction. */ typedef enum { OUTPUT_CHANNELS_DEFAULT, /*!< Default configuration depending on Decoder Level */ OUTPUT_CHANNELS_2_0, /*!< Limitation to stereo output */ OUTPUT_CHANNELS_5_1 /*!< Limitation to 5.1 output */ } CFG_RESTRICTION; /* * \brief Supported decoder mode. */ typedef enum { EXT_HQ_ONLY = 0, /*!< High Quality processing only */ EXT_LP_ONLY = 1, /*!< Low Power procesing only */ EXT_HQ_AND_LP = 2 /*!< Support both HQ and LP processing */ } CFG_EXTENT; /* * \brief Supported binaural mode. */ typedef enum { BINAURAL_NONE = -1 /*!< No binaural procesing supported */ } CFG_BINAURAL; /** * \brief Decoder configuration structure. * * These structure contains all parameters necessary for decoder open function. * The configuration specifies the functional range of the decoder instance. */ typedef struct { CFG_LEVEL decoderLevel; CFG_EXTENT decoderMode; CFG_RESTRICTION maxNumOutputChannels; CFG_BINAURAL binauralMode; } SPATIAL_DEC_CONFIG; typedef enum { INPUTMODE_QMF = 1000, INPUTMODE_QMF_SBR = 1001, INPUTMODE_TIME = 1002 } SPATIALDEC_INPUT_MODE; /** * \brief MPEG Surround upmix type mode. **/ typedef enum { UPMIX_TYPE_BYPASS = -1, /*!< Bypass the downmix channels from the core decoder. */ UPMIX_TYPE_NORMAL = 0 /*!< Multi channel output. */ } SPATIAL_DEC_UPMIX_TYPE; /** * \brief Dynamic decoder parameters. */ typedef struct { /* Basics */ UCHAR outputMode; UCHAR blindEnable; UCHAR bypassMode; /* Error concealment */ UCHAR concealMethod; UINT concealNumKeepFrames; UINT concealFadeOutSlopeLength; UINT concealFadeInSlopeLength; UINT concealNumReleaseFrames; } SPATIALDEC_PARAM; /** * \brief Flags which control the initialization **/ typedef enum { MPEGS_INIT_NONE = 0x00000000, /*!< Indicates no initialization */ MPEGS_INIT_CONFIG = 0x00000010, /*!< Indicates a configuration change due to SSC value changes */ MPEGS_INIT_STATES_ANA_QMF_FILTER = 0x00000100, /*!< Controls the initialization of the analysis qmf filter states */ MPEGS_INIT_STATES_SYN_QMF_FILTER = 0x00000200, /*!< Controls the initialization of the synthesis qmf filter states */ MPEGS_INIT_STATES_ANA_HYB_FILTER = 0x00000400, /*!< Controls the initialization of the analysis hybrid filter states */ MPEGS_INIT_STATES_DECORRELATOR = 0x00000800, /*!< Controls the initialization of the decorrelator states */ MPEGS_INIT_STATES_M1M2 = 0x00002000, /*!< Controls the initialization of the history in m1 and m2 parameter calculation */ MPEGS_INIT_STATES_GES = 0x00004000, /*!< Controls the initialization of the history in the ges calculation */ MPEGS_INIT_STATES_REVERB = 0x00008000, /*!< Controls the initialization of the reverb states */ MPEGS_INIT_STATES_PARAM = 0x00020000, /*!< Controls the initialization of the history of all other parameter */ MPEGS_INIT_STATES_ERROR_CONCEALMENT = 0x00080000, /*!< Controls the initialization of the error concealment module state */ MPEGS_INIT_PARAMS_ERROR_CONCEALMENT = 0x00200000 /*!< Controls the initialization of the whole error concealment parameter set */ } MPEGS_INIT_CTRL_FLAGS; #define MASK_MPEGS_INIT_ALL_STATES (0x000FFF00) #define MASK_MPEGS_INIT_ALL_PARAMS (0x00F00000) typedef struct spatialDec_struct spatialDec, *HANDLE_SPATIAL_DEC; typedef struct SPATIAL_BS_FRAME_struct SPATIAL_BS_FRAME; typedef struct { UINT sizePersistent; /* persistent memory */ UINT sizeFastPersistent; /* fast persistent memory */ } MEM_REQUIREMENTS; #define PCM_MPS INT_PCM #define PCM_MPSF FIXP_PCM #define FIXP_DBL2PCM_MPS(x) ((INT_PCM)FX_DBL2FX_PCM(x)) /* exposed functions (library interface) */ int FDK_SpatialDecCompareSpatialSpecificConfigHeader( SPATIAL_SPECIFIC_CONFIG *pSsc1, SPATIAL_SPECIFIC_CONFIG *pSsc2); int FDK_SpatialDecInitDefaultSpatialSpecificConfig( SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, AUDIO_OBJECT_TYPE coreCodec, int coreChannels, int samplingFreq, int nTimeSlots, int decoderLevel, int isBlind); spatialDec *FDK_SpatialDecOpen(const SPATIAL_DEC_CONFIG *config, int stereoConfigIndex); /** * \brief Initialize state variables of the MPS parser */ void SpatialDecInitParserContext(spatialDec *self); /** * \brief Initialize state of MPS decoder. This may happen after the first parse * operation. */ SACDEC_ERROR FDK_SpatialDecInit(spatialDec *self, SPATIAL_BS_FRAME *frame, SPATIAL_SPECIFIC_CONFIG *pSpatialSpecificConfig, int nQmfBands, SPATIAL_DEC_UPMIX_TYPE const upmixType, SPATIALDEC_PARAM *pUserParams, UINT initFlags /* MPEGS_INIT_CTRL_FLAGS */ ); /** * \brief Apply decoded MPEG Surround parameters to time domain or QMF down mix * data. * \param self spatial decoder handle. * \param inData Pointer to time domain input down mix data if any. * \param qmfInDataReal Pointer array of QMF domain down mix input data (real * part). * \param qmfInDataImag Pointer array of QMF domain down mix input data * (imaginary part). * \param pcmOutBuf Pointer to a time domain buffer were the upmixed output data * will be stored into. * \param nSamples Amount of audio samples per channel of down mix input data * (frame length). * \param pControlFlags pointer to control flags field; input/output. * \param numInputChannels amount of down mix input channels. Might not match * the current tree config, useful for internal sanity checks and bypass mode. * \param channelMapping array containing the desired output channel ordering to * transform MPEG PCE style ordering to any other channel ordering. First * dimension is the total channel count. */ SACDEC_ERROR SpatialDecApplyFrame( spatialDec *self, SPATIAL_BS_FRAME *frame, SPATIALDEC_INPUT_MODE inputMode, PCM_MPS *inData, /* Time domain input */ FIXP_DBL **qmfInDataReal, /* interleaved l/r */ FIXP_DBL **qmfInDataImag, /* interleaved l/r */ PCM_MPS *pcmOutBuf, /* MAX_OUTPUT_CHANNELS*MAX_TIME_SLOTS*NUM_QMF_BANDS] */ UINT nSamples, UINT *pControlFlags, int numInputChannels, const FDK_channelMapDescr *const mapDescr); /** * \brief Fill given arrays with audio channel types and indices. * \param self spatial decoder handle. * \param channelType array where corresponding channel types fr each output * channels are stored into. * \param channelIndices array where corresponding channel type indices fr each * output channels are stored into. */ void SpatialDecChannelProperties(spatialDec *self, AUDIO_CHANNEL_TYPE channelType[], UCHAR channelIndices[], const FDK_channelMapDescr *const mapDescr); void FDK_SpatialDecClose(spatialDec *self); #ifdef __cplusplus } #endif #endif /* SAC_DEC_INTERFACE_H */