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Diffstat (limited to 'libAACdec/src/usacdec_const.h')
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diff --git a/libAACdec/src/usacdec_const.h b/libAACdec/src/usacdec_const.h new file mode 100644 index 0000000..c7dbae7 --- /dev/null +++ b/libAACdec/src/usacdec_const.h @@ -0,0 +1,202 @@ +/* ----------------------------------------------------------------------------- +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 +----------------------------------------------------------------------------- */ + +/**************************** AAC decoder library ****************************** + + Author(s): Manuel Jander + + Description: USAC related constants + +*******************************************************************************/ + +#ifndef USACDEC_CONST_H +#define USACDEC_CONST_H + +/* scale factors */ +#define SF_CODE 6 /* exponent of code[], fixed codebook vector */ +#define SF_GAIN_C 16 /* exponent of gain code and smoothed gain code */ +#define SF_EXC 16 /* exponent of exc[] and exc2[], excitation buffer */ +#define SF_GAIN_P 1 /* exponent of gain_pit */ +#define SF_PFAC 0 /* exponent of period/voicing factor */ +#define SF_SYNTH SF_EXC /* exponent of synthesis buffer */ +#define SF_A_COEFFS 3 /* exponent of LP domain synthesis filter coefficient */ +#define SF_STAB 1 /* exponent of stability factor */ + +/* definitions which are independent of coreCoderFrameLength */ +#define M_LP_FILTER_ORDER 16 /* LP filter order */ + +#define PIT_MIN_12k8 34 /* Minimum pitch lag with resolution 1/4 */ +#define PIT_MAX_12k8 231 /* Maximum pitch lag for fs=12.8kHz */ +#define FSCALE_DENOM 12800 /* Frequency scale denominator */ +#define FAC_FSCALE_MIN \ + 6000 /* Minimum allowed frequency scale for acelp decoder */ + +#if !defined(LPD_MAX_CORE_SR) +#define LPD_MAX_CORE_SR 24000 /* Default value from ref soft */ +#endif +#define FAC_FSCALE_MAX \ + LPD_MAX_CORE_SR /* Maximum allowed frequency scale for acelp decoder */ + +/* Maximum pitch lag (= 411 for fs_max = 24000) */ +#define PIT_MAX_TMP \ + (PIT_MAX_12k8 + \ + (6 * \ + ((((FAC_FSCALE_MAX * PIT_MIN_12k8) + (FSCALE_DENOM / 2)) / FSCALE_DENOM) - \ + PIT_MIN_12k8))) +#if (PIT_MAX_TMP < \ + 256) /* cannot be smaller because of tcx time domain concealment */ +#define PIT_MAX_MAX 256 +#else +#define PIT_MAX_MAX PIT_MAX_TMP +#endif + +#define NB_DIV 4 /* number of division (20ms) per 80ms frame */ +#define L_SUBFR 64 /* subframe size (5ms) */ +#define BPF_SFD 1 /* bass postfilter delay (subframe) */ +#define BPF_DELAY (BPF_SFD * L_SUBFR) /* bass postfilter delay (samples) */ + +#define L_FILT 12 /* Delay of up-sampling filter (bass post-filter) */ +#define L_EXTRA 96 /* for bass post-filter */ +#define L_INTERPOL \ + (16 + 1) /* Length of filter for interpolation (acelp decoder) */ + +/* definitions for coreCoderFrameLength = 1024 */ +#define L_FRAME_PLUS_1024 1024 /* length of one 80ms superframe */ +#define L_DIV_1024 \ + (L_FRAME_PLUS_1024 / NB_DIV) /* length of one acelp or tcx20 frame */ +#define NB_SUBFR_1024 \ + (L_DIV_1024 / L_SUBFR) /* number of 5ms subframe per division */ +#define NB_SUBFR_SUPERFR_1024 \ + (L_FRAME_PLUS_1024 / L_SUBFR) /* number of 5ms subframe per 80ms frame */ +#define AAC_SFD_1024 (NB_SUBFR_SUPERFR_1024 / 2) /* AAC delay (subframe) */ +#define AAC_DELAY_1024 (AAC_SFD_1024 * L_SUBFR) /* AAC delay (samples) */ +#define SYN_SFD_1024 (AAC_SFD_1024 - BPF_SFD) /* synthesis delay (subframe) */ +#define SYN_DELAY_1024 \ + (SYN_SFD_1024 * L_SUBFR) /* synthesis delay (samples) \ + */ +#define LFAC_1024 (L_DIV_1024 / 2) /* FAC frame length */ +#define LFAC_SHORT_1024 \ + (L_DIV_1024 / 4) /* for transitions EIGHT_SHORT FD->LPD and vv. */ +#define FDNS_NPTS_1024 64 /* FD noise shaping resolution (64=100Hz/point) */ + +/* definitions for coreCoderFrameLength = 768 */ +#define L_FRAME_PLUS_768 768 +#define L_DIV_768 \ + (L_FRAME_PLUS_768 / NB_DIV) /* length of one acelp or tcx20 frame */ +#define NB_SUBFR_768 \ + (L_DIV_768 / L_SUBFR) /* number of 5ms subframe per division */ +#define NB_SUBFR_SUPERFR_768 \ + (L_FRAME_PLUS_768 / L_SUBFR) /* number of 5ms subframe per 80ms frame */ +#define AAC_SFD_768 (NB_SUBFR_SUPERFR_768 / 2) /* AAC delay (subframe) */ +#define AAC_DELAY_768 (AAC_SFD_768 * L_SUBFR) /* AAC delay (samples) */ +#define SYN_SFD_768 (AAC_SFD_768 - BPF_SFD) /* synthesis delay (subframe) */ +#define SYN_DELAY_768 (SYN_SFD_768 * L_SUBFR) /* synthesis delay (samples) */ +#define LFAC_768 (L_DIV_768 / 2) /* FAC frame length */ +#define LFAC_SHORT_768 \ + (L_DIV_768 / 4) /* for transitions EIGHT_SHORT FD->LPD and vv. */ + +/* maximum (used for memory allocation) */ +#define L_FRAME_PLUS L_FRAME_PLUS_1024 +#define L_DIV L_DIV_1024 +#define NB_SUBFR NB_SUBFR_1024 +#define NB_SUBFR_SUPERFR NB_SUBFR_SUPERFR_1024 +#define AAC_SFD AAC_SFD_1024 +#define AAC_DELAY AAC_DELAY_1024 +#define SYN_SFD SYN_SFD_1024 +#define SYN_DELAY SYN_DELAY_1024 +#define LFAC LFAC_1024 +#define LFAC_SHORT LFAC_SHORT_1024 +#define FDNS_NPTS FDNS_NPTS_1024 + +#endif /* USACDEC_CONST_H */ |