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Bug: 112663886 Test: atest DecoderTestXheAac ; atest DecoderTestAacDrc Change-Id: Ie7af65a1a556afb141ea5272f70bfea11881ac30
204 lines
9.2 KiB
C
204 lines
9.2 KiB
C
/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. 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
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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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
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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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,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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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
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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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
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized 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
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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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,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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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
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this software, even if 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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/**************************** AAC decoder library ******************************
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Author(s): Manuel Jander
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Description: USAC related constants
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*******************************************************************************/
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#ifndef USACDEC_CONST_H
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#define USACDEC_CONST_H
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/* scale factors */
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#define SF_CODE 6 /* exponent of code[], fixed codebook vector */
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#define SF_GAIN_C 16 /* exponent of gain code and smoothed gain code */
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#define SF_EXC 16 /* exponent of exc[] and exc2[], excitation buffer */
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#define SF_GAIN_P 1 /* exponent of gain_pit */
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#define SF_PFAC 0 /* exponent of period/voicing factor */
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#define SF_SYNTH SF_EXC /* exponent of synthesis buffer */
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#define SF_A_COEFFS 3 /* exponent of LP domain synthesis filter coefficient */
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#define SF_STAB 1 /* exponent of stability factor */
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/* definitions which are independent of coreCoderFrameLength */
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#define M_LP_FILTER_ORDER 16 /* LP filter order */
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#define LP_FILTER_SCALE 4 /* LP filter scale */
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#define PIT_MIN_12k8 34 /* Minimum pitch lag with resolution 1/4 */
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#define PIT_MAX_12k8 231 /* Maximum pitch lag for fs=12.8kHz */
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#define FSCALE_DENOM 12800 /* Frequency scale denominator */
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#define FAC_FSCALE_MIN \
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6000 /* Minimum allowed frequency scale for acelp decoder */
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#if !defined(LPD_MAX_CORE_SR)
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#define LPD_MAX_CORE_SR 24000 /* Default value from ref soft */
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#endif
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#define FAC_FSCALE_MAX \
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LPD_MAX_CORE_SR /* Maximum allowed frequency scale for acelp decoder */
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/* Maximum pitch lag (= 411 for fs_max = 24000) */
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#define PIT_MAX_TMP \
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(PIT_MAX_12k8 + \
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(6 * \
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((((FAC_FSCALE_MAX * PIT_MIN_12k8) + (FSCALE_DENOM / 2)) / FSCALE_DENOM) - \
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PIT_MIN_12k8)))
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#if (PIT_MAX_TMP < \
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256) /* cannot be smaller because of tcx time domain concealment */
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#define PIT_MAX_MAX 256
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#else
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#define PIT_MAX_MAX PIT_MAX_TMP
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#endif
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#define NB_DIV 4 /* number of division (20ms) per 80ms frame */
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#define L_SUBFR 64 /* subframe size (5ms) */
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#define BPF_SFD 1 /* bass postfilter delay (subframe) */
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#define BPF_DELAY (BPF_SFD * L_SUBFR) /* bass postfilter delay (samples) */
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#define L_FILT 12 /* Delay of up-sampling filter (bass post-filter) */
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#define L_EXTRA 96 /* for bass post-filter */
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#define L_INTERPOL \
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(16 + 1) /* Length of filter for interpolation (acelp decoder) */
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/* definitions for coreCoderFrameLength = 1024 */
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#define L_FRAME_PLUS_1024 1024 /* length of one 80ms superframe */
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#define L_DIV_1024 \
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(L_FRAME_PLUS_1024 / NB_DIV) /* length of one acelp or tcx20 frame */
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#define NB_SUBFR_1024 \
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(L_DIV_1024 / L_SUBFR) /* number of 5ms subframe per division */
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#define NB_SUBFR_SUPERFR_1024 \
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(L_FRAME_PLUS_1024 / L_SUBFR) /* number of 5ms subframe per 80ms frame */
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#define AAC_SFD_1024 (NB_SUBFR_SUPERFR_1024 / 2) /* AAC delay (subframe) */
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#define AAC_DELAY_1024 (AAC_SFD_1024 * L_SUBFR) /* AAC delay (samples) */
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#define SYN_SFD_1024 (AAC_SFD_1024 - BPF_SFD) /* synthesis delay (subframe) */
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#define SYN_DELAY_1024 \
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(SYN_SFD_1024 * L_SUBFR) /* synthesis delay (samples) \
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*/
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#define LFAC_1024 (L_DIV_1024 / 2) /* FAC frame length */
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#define LFAC_SHORT_1024 \
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(L_DIV_1024 / 4) /* for transitions EIGHT_SHORT FD->LPD and vv. */
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#define FDNS_NPTS_1024 64 /* FD noise shaping resolution (64=100Hz/point) */
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/* definitions for coreCoderFrameLength = 768 */
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#define L_FRAME_PLUS_768 768
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#define L_DIV_768 \
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(L_FRAME_PLUS_768 / NB_DIV) /* length of one acelp or tcx20 frame */
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#define NB_SUBFR_768 \
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(L_DIV_768 / L_SUBFR) /* number of 5ms subframe per division */
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#define NB_SUBFR_SUPERFR_768 \
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(L_FRAME_PLUS_768 / L_SUBFR) /* number of 5ms subframe per 80ms frame */
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#define AAC_SFD_768 (NB_SUBFR_SUPERFR_768 / 2) /* AAC delay (subframe) */
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#define AAC_DELAY_768 (AAC_SFD_768 * L_SUBFR) /* AAC delay (samples) */
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#define SYN_SFD_768 (AAC_SFD_768 - BPF_SFD) /* synthesis delay (subframe) */
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#define SYN_DELAY_768 (SYN_SFD_768 * L_SUBFR) /* synthesis delay (samples) */
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#define LFAC_768 (L_DIV_768 / 2) /* FAC frame length */
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#define LFAC_SHORT_768 \
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(L_DIV_768 / 4) /* for transitions EIGHT_SHORT FD->LPD and vv. */
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/* maximum (used for memory allocation) */
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#define L_FRAME_PLUS L_FRAME_PLUS_1024
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#define L_DIV L_DIV_1024
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#define NB_SUBFR NB_SUBFR_1024
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#define NB_SUBFR_SUPERFR NB_SUBFR_SUPERFR_1024
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#define AAC_SFD AAC_SFD_1024
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#define AAC_DELAY AAC_DELAY_1024
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#define SYN_SFD SYN_SFD_1024
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#define SYN_DELAY SYN_DELAY_1024
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#define LFAC LFAC_1024
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#define LFAC_SHORT LFAC_SHORT_1024
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#define FDNS_NPTS FDNS_NPTS_1024
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#endif /* USACDEC_CONST_H */
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