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diff --git a/libAACdec/src/rvlc_info.h b/libAACdec/src/rvlc_info.h new file mode 100644 index 0000000..e245090 --- /dev/null +++ b/libAACdec/src/rvlc_info.h @@ -0,0 +1,176 @@ + +/* ----------------------------------------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2012 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 +----------------------------------------------------------------------------------------------------------- */ + +/*! + \file + \brief Defines structures for RVLC + \author Robert Weidner +*/ +#ifndef RVLC_INFO_H +#define RVLC_INFO_H + + + +#define FWD 0 /* bitstream decoding direction forward (RVL coded part) */ +#define BWD 1 /* bitstream decoding direction backward (RVL coded part) */ + +#define MAX_RVL 7 /* positive RVLC escape */ +#define MIN_RVL -7 /* negative RVLC escape */ +#define MAX_ALLOWED_DPCM_INDEX 14 /* the maximum allowed index of a decoded dpcm value (offset 'TABLE_OFFSET' incl --> must be subtracted) */ +#define TABLE_OFFSET 7 /* dpcm offset of valid output values of rvl table decoding, the rvl table ouly returns positive values, therefore the offset */ +#define MAX_LEN_RVLC_CODE_WORD 9 /* max length of a RVL codeword in bits */ +#define MAX_LEN_RVLC_ESCAPE_WORD 20 /* max length of huffman coded RVLC escape word in bits */ + +#define DPCM_NOISE_NRG_BITS 9 +#define SF_OFFSET 100 /* offset for correcting scf value */ + +#define CONCEAL_MAX_INIT 1311 /* arbitrary value */ +#define CONCEAL_MIN_INIT -1311 /* arbitrary value */ + +#define RVLC_MAX_SFB ((8) * (16)) + +/* sideinfo of RVLC */ +typedef struct +{ + /* ------- ESC 1 Data: --------- */ /* order of RVLC-bitstream components in bitstream (RVLC-initialization), every component appears only once in bitstream */ + INT sf_concealment; /* 1 */ + INT rev_global_gain; /* 2 */ + SHORT length_of_rvlc_sf; /* 3 */ /* original value, gets modified (subtract 9) in case of noise (PNS); is kept for later use */ + INT dpcm_noise_nrg; /* 4 optional */ + INT sf_escapes_present; /* 5 */ + SHORT length_of_rvlc_escapes; /* 6 optional */ + INT dpcm_noise_last_position; /* 7 optional */ + + INT dpcm_is_last_position; + + SHORT length_of_rvlc_sf_fwd; /* length_of_rvlc_sf used for forward decoding */ + SHORT length_of_rvlc_sf_bwd; /* length_of_rvlc_sf used for backward decoding */ + + /* for RVL-Codeword decoder to distinguish between fwd and bwd decoding */ + SHORT *pRvlBitCnt_RVL; + USHORT *pBitstrIndxRvl_RVL; + + UCHAR numWindowGroups; + UCHAR maxSfbTransmitted; + UCHAR first_noise_group; + UCHAR first_noise_band; + UCHAR direction; + + /* bitstream indices */ + USHORT bitstreamIndexRvlFwd; /* base address of RVL-coded-scalefactor data (ESC 2) for forward decoding */ + USHORT bitstreamIndexRvlBwd; /* base address of RVL-coded-scalefactor data (ESC 2) for backward decoding */ + USHORT bitstreamIndexEsc; /* base address where RVLC-escapes start (ESC 2) */ + + /* decoding trees */ + const UINT *pHuffTreeRvlCodewds; + const UINT *pHuffTreeRvlcEscape; + + /* escape counters */ + UCHAR numDecodedEscapeWordsFwd; /* when decoding RVL-codes forward */ + UCHAR numDecodedEscapeWordsBwd; /* when decoding RVL-codes backward */ + UCHAR numDecodedEscapeWordsEsc; /* when decoding the escape-Words */ + + SCHAR noise_used; + SCHAR intensity_used; + SCHAR sf_used; + + SHORT firstScf; + SHORT lastScf; + SHORT firstNrg; + SHORT lastNrg; + SHORT firstIs; + SHORT lastIs; + + /* ------ RVLC error detection ------ */ + UINT errorLogRvlc; /* store RVLC errors */ + SHORT conceal_min; /* is set at backward decoding */ + SHORT conceal_max; /* is set at forward decoding */ + SHORT conceal_min_esc; /* is set at backward decoding */ + SHORT conceal_max_esc; /* is set at forward decoding */ +} CErRvlcInfo; + +typedef CErRvlcInfo RVLC_INFO; /* temp */ + + + +#endif /* RVLC_INFO_H */ |