4f0d97057c
- Update disclaimer in all source files. - Increment library version in each FDK sub-module. Bug 9428126 Change-Id: I490b96d4ee472246b01483202b0bb4f1e9c2a5d7
177 lines
8.4 KiB
C
177 lines
8.4 KiB
C
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
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the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
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This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
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audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
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independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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of the MPEG specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
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individually for the purpose of encoding or decoding bit streams in products that are compliant with
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the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
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these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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software may already be covered under those patent licenses when it is used for those licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
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are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
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applications information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification, are permitted without
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payment of copyright license fees provided that you satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
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your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation and/or other materials
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provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived from this library without
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prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
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software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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and the date of any change. For modified versions of the FDK AAC Codec, the term
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"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
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"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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respect to this software.
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You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
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"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
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including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
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or business interruption, however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of this software, even if
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advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------------------------------------- */
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/*!
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\file
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\brief Defines structures for RVLC
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\author Robert Weidner
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*/
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#ifndef RVLC_INFO_H
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#define RVLC_INFO_H
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#define FWD 0 /* bitstream decoding direction forward (RVL coded part) */
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#define BWD 1 /* bitstream decoding direction backward (RVL coded part) */
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#define MAX_RVL 7 /* positive RVLC escape */
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#define MIN_RVL -7 /* negative RVLC escape */
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#define MAX_ALLOWED_DPCM_INDEX 14 /* the maximum allowed index of a decoded dpcm value (offset 'TABLE_OFFSET' incl --> must be subtracted) */
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#define TABLE_OFFSET 7 /* dpcm offset of valid output values of rvl table decoding, the rvl table ouly returns positive values, therefore the offset */
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#define MAX_LEN_RVLC_CODE_WORD 9 /* max length of a RVL codeword in bits */
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#define MAX_LEN_RVLC_ESCAPE_WORD 20 /* max length of huffman coded RVLC escape word in bits */
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#define DPCM_NOISE_NRG_BITS 9
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#define SF_OFFSET 100 /* offset for correcting scf value */
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#define CONCEAL_MAX_INIT 1311 /* arbitrary value */
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#define CONCEAL_MIN_INIT -1311 /* arbitrary value */
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#define RVLC_MAX_SFB ((8) * (16))
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/* sideinfo of RVLC */
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typedef struct
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{
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/* ------- ESC 1 Data: --------- */ /* order of RVLC-bitstream components in bitstream (RVLC-initialization), every component appears only once in bitstream */
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INT sf_concealment; /* 1 */
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INT rev_global_gain; /* 2 */
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SHORT length_of_rvlc_sf; /* 3 */ /* original value, gets modified (subtract 9) in case of noise (PNS); is kept for later use */
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INT dpcm_noise_nrg; /* 4 optional */
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INT sf_escapes_present; /* 5 */
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SHORT length_of_rvlc_escapes; /* 6 optional */
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INT dpcm_noise_last_position; /* 7 optional */
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INT dpcm_is_last_position;
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SHORT length_of_rvlc_sf_fwd; /* length_of_rvlc_sf used for forward decoding */
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SHORT length_of_rvlc_sf_bwd; /* length_of_rvlc_sf used for backward decoding */
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/* for RVL-Codeword decoder to distinguish between fwd and bwd decoding */
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SHORT *pRvlBitCnt_RVL;
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USHORT *pBitstrIndxRvl_RVL;
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UCHAR numWindowGroups;
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UCHAR maxSfbTransmitted;
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UCHAR first_noise_group;
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UCHAR first_noise_band;
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UCHAR direction;
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/* bitstream indices */
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USHORT bitstreamIndexRvlFwd; /* base address of RVL-coded-scalefactor data (ESC 2) for forward decoding */
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USHORT bitstreamIndexRvlBwd; /* base address of RVL-coded-scalefactor data (ESC 2) for backward decoding */
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USHORT bitstreamIndexEsc; /* base address where RVLC-escapes start (ESC 2) */
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/* decoding trees */
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const UINT *pHuffTreeRvlCodewds;
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const UINT *pHuffTreeRvlcEscape;
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/* escape counters */
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UCHAR numDecodedEscapeWordsFwd; /* when decoding RVL-codes forward */
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UCHAR numDecodedEscapeWordsBwd; /* when decoding RVL-codes backward */
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UCHAR numDecodedEscapeWordsEsc; /* when decoding the escape-Words */
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SCHAR noise_used;
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SCHAR intensity_used;
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SCHAR sf_used;
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SHORT firstScf;
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SHORT lastScf;
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SHORT firstNrg;
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SHORT lastNrg;
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SHORT firstIs;
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SHORT lastIs;
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/* ------ RVLC error detection ------ */
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UINT errorLogRvlc; /* store RVLC errors */
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SHORT conceal_min; /* is set at backward decoding */
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SHORT conceal_max; /* is set at forward decoding */
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SHORT conceal_min_esc; /* is set at backward decoding */
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SHORT conceal_max_esc; /* is set at forward decoding */
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} CErRvlcInfo;
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typedef CErRvlcInfo RVLC_INFO; /* temp */
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#endif /* RVLC_INFO_H */
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