| |
| /* ----------------------------------------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2015 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 SBR main definitions |
| */ |
| #ifndef __SBR_DEF_H |
| #define __SBR_DEF_H |
| |
| #include "common_fix.h" |
| |
| #define noError 0 |
| #define HANDLE_ERROR_INFO INT |
| #define ERROR(a,b) 1 |
| #define handBack |
| |
| /* #define SBR_ENV_STATISTICS_BITRATE */ |
| #undef SBR_ENV_STATISTICS_BITRATE |
| |
| /* #define SBR_ENV_STATISTICS */ |
| #undef SBR_ENV_STATISTICS |
| |
| /* #define SBR_PAYLOAD_MONITOR */ |
| #undef SBR_PAYLOAD_MONITOR |
| |
| #define SWAP(a,b) tempr=a, a=b, b=tempr |
| #define TRUE 1 |
| #define FALSE 0 |
| |
| |
| /* Constants */ |
| #define EPS 1e-12 |
| #define LOG2 0.69314718056f /* natural logarithm of 2 */ |
| #define ILOG2 1.442695041f /* 1/LOG2 */ |
| #define RELAXATION_FLOAT (1e-6f) |
| #define RELAXATION (FL2FXCONST_DBL(RELAXATION_FLOAT)) |
| #define RELAXATION_FRACT (FL2FXCONST_DBL(0.524288f)) /* 0.524288f is fractional part of RELAXATION */ |
| #define RELAXATION_SHIFT (19) |
| #define RELAXATION_LD64 (FL2FXCONST_DBL(0.31143075889f))/* (ld64(RELAXATION) */ |
| |
| /************ Definitions ***************/ |
| #define SBR_COMP_MODE_DELTA 0 |
| #define SBR_COMP_MODE_CTS 1 |
| #define SBR_MAX_ENERGY_VALUES 5 |
| #define SBR_GLOBAL_TONALITY_VALUES 2 |
| |
| #define MAX_NUM_CHANNELS 2 |
| |
| #define MAX_NOISE_ENVELOPES 2 |
| #define MAX_NUM_NOISE_COEFFS 5 |
| #define MAX_NUM_NOISE_VALUES (MAX_NUM_NOISE_COEFFS*MAX_NOISE_ENVELOPES) |
| |
| #define MAX_NUM_ENVELOPE_VALUES (MAX_ENVELOPES * MAX_FREQ_COEFFS) |
| #define MAX_ENVELOPES 5 |
| #define MAX_FREQ_COEFFS 48 |
| |
| #define MAX_FREQ_COEFFS_FS44100 35 |
| #define MAX_FREQ_COEFFS_FS48000 32 |
| |
| |
| #define QMF_CHANNELS 64 |
| #define QMF_FILTER_LENGTH 640 |
| #define QMF_MAX_TIME_SLOTS 32 |
| #define NO_OF_ESTIMATES_LC 4 |
| #define NO_OF_ESTIMATES_LD 3 |
| #define MAX_NO_OF_ESTIMATES 4 |
| |
| |
| #define NOISE_FLOOR_OFFSET 6 |
| #define NOISE_FLOOR_OFFSET_64 (FL2FXCONST_DBL(0.09375f)) |
| |
| #define LOW_RES 0 |
| #define HIGH_RES 1 |
| |
| #define LO 0 |
| #define HI 1 |
| |
| #define LENGTH_SBR_FRAME_INFO 35 /* 19 */ |
| |
| #define SBR_NSFB_LOW_RES 9 /* 8 */ |
| #define SBR_NSFB_HIGH_RES 18 /* 16 */ |
| |
| |
| #define SBR_XPOS_CTRL_DEFAULT 2 |
| |
| #define SBR_FREQ_SCALE_DEFAULT 2 |
| #define SBR_ALTER_SCALE_DEFAULT 1 |
| #define SBR_NOISE_BANDS_DEFAULT 2 |
| |
| #define SBR_LIMITER_BANDS_DEFAULT 2 |
| #define SBR_LIMITER_GAINS_DEFAULT 2 |
| #define SBR_LIMITER_GAINS_INFINITE 3 |
| #define SBR_INTERPOL_FREQ_DEFAULT 1 |
| #define SBR_SMOOTHING_LENGTH_DEFAULT 0 |
| |
| |
| /* sbr_header */ |
| #define SI_SBR_AMP_RES_BITS 1 |
| #define SI_SBR_COUPLING_BITS 1 |
| #define SI_SBR_START_FREQ_BITS 4 |
| #define SI_SBR_STOP_FREQ_BITS 4 |
| #define SI_SBR_XOVER_BAND_BITS 3 |
| #define SI_SBR_RESERVED_BITS 2 |
| #define SI_SBR_DATA_EXTRA_BITS 1 |
| #define SI_SBR_HEADER_EXTRA_1_BITS 1 |
| #define SI_SBR_HEADER_EXTRA_2_BITS 1 |
| |
| /* sbr_header extra 1 */ |
| #define SI_SBR_FREQ_SCALE_BITS 2 |
| #define SI_SBR_ALTER_SCALE_BITS 1 |
| #define SI_SBR_NOISE_BANDS_BITS 2 |
| |
| /* sbr_header extra 2 */ |
| #define SI_SBR_LIMITER_BANDS_BITS 2 |
| #define SI_SBR_LIMITER_GAINS_BITS 2 |
| #define SI_SBR_INTERPOL_FREQ_BITS 1 |
| #define SI_SBR_SMOOTHING_LENGTH_BITS 1 |
| |
| /* sbr_grid */ |
| #define SBR_CLA_BITS 2 /*!< size of bs_frame_class */ |
| #define SBR_CLA_BITS_LD 1 /*!< size of bs_frame_class */ |
| #define SBR_ENV_BITS 2 /*!< size of bs_num_env_raw */ |
| #define SBR_ABS_BITS 2 /*!< size of bs_abs_bord_raw for HE-AAC */ |
| #define SBR_NUM_BITS 2 /*!< size of bs_num_rel */ |
| #define SBR_REL_BITS 2 /*!< size of bs_rel_bord_raw */ |
| #define SBR_RES_BITS 1 /*!< size of bs_freq_res_flag */ |
| #define SBR_DIR_BITS 1 /*!< size of bs_df_flag */ |
| |
| |
| /* sbr_data */ |
| #define SI_SBR_INVF_MODE_BITS 2 |
| |
| |
| #define SI_SBR_START_ENV_BITS_AMP_RES_3_0 6 |
| #define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_3_0 5 |
| #define SI_SBR_START_NOISE_BITS_AMP_RES_3_0 5 |
| #define SI_SBR_START_NOISE_BITS_BALANCE_AMP_RES_3_0 5 |
| |
| #define SI_SBR_START_ENV_BITS_AMP_RES_1_5 7 |
| #define SI_SBR_START_ENV_BITS_BALANCE_AMP_RES_1_5 6 |
| |
| |
| #define SI_SBR_EXTENDED_DATA_BITS 1 |
| #define SI_SBR_EXTENSION_SIZE_BITS 4 |
| #define SI_SBR_EXTENSION_ESC_COUNT_BITS 8 |
| #define SI_SBR_EXTENSION_ID_BITS 2 |
| |
| #define SBR_EXTENDED_DATA_MAX_CNT (15+255) |
| |
| #define EXTENSION_ID_PS_CODING 2 |
| |
| /* Envelope coding constants */ |
| #define FREQ 0 |
| #define TIME 1 |
| |
| /* qmf data scaling */ |
| #define QMF_SCALE_OFFSET 7 |
| |
| /* huffman tables */ |
| #define CODE_BOOK_SCF_LAV00 60 |
| #define CODE_BOOK_SCF_LAV01 31 |
| #define CODE_BOOK_SCF_LAV10 60 |
| #define CODE_BOOK_SCF_LAV11 31 |
| #define CODE_BOOK_SCF_LAV_BALANCE11 12 |
| #define CODE_BOOK_SCF_LAV_BALANCE10 24 |
| |
| typedef enum |
| { |
| SBR_AMP_RES_1_5=0, |
| SBR_AMP_RES_3_0 |
| } |
| AMP_RES; |
| |
| typedef enum |
| { |
| XPOS_MDCT, |
| XPOS_MDCT_CROSS, |
| XPOS_LC, |
| XPOS_RESERVED, |
| XPOS_SWITCHED /* not a real choice but used here to control behaviour */ |
| } |
| XPOS_MODE; |
| |
| typedef enum |
| { |
| INVF_OFF = 0, |
| INVF_LOW_LEVEL, |
| INVF_MID_LEVEL, |
| INVF_HIGH_LEVEL, |
| INVF_SWITCHED /* not a real choice but used here to control behaviour */ |
| } |
| INVF_MODE; |
| |
| #endif |
