mirror of https://github.com/mstorsjo/fdk-aac.git
268 lines
9.4 KiB
C
268 lines
9.4 KiB
C
|
|
/* -----------------------------------------------------------------------------------------------------------
|
|
Software License for The Fraunhofer FDK AAC Codec Library for Android
|
|
|
|
© Copyright 1995 - 2013 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
|
|
----------------------------------------------------------------------------------------------------------- */
|
|
|
|
/*************************** Fraunhofer IIS FDK Tools ***********************
|
|
|
|
Author(s): Oliver Moser
|
|
Description: ROM tables used by FDK tools
|
|
|
|
******************************************************************************/
|
|
|
|
#ifndef __FDK_TOOLS_ROM_H__
|
|
#define __FDK_TOOLS_ROM_H__
|
|
|
|
#include "common_fix.h"
|
|
#include "FDK_audio.h"
|
|
|
|
|
|
/* None radix2 rotation vectors */
|
|
extern const FIXP_STB RotVectorReal60[60];
|
|
extern const FIXP_STB RotVectorImag60[60];
|
|
extern const FIXP_STB RotVectorReal240[240];
|
|
extern const FIXP_STB RotVectorImag240[240];
|
|
extern const FIXP_STB RotVectorReal480[480];
|
|
extern const FIXP_STB RotVectorImag480[480];
|
|
|
|
|
|
/* Regular sine tables */
|
|
extern const FIXP_STP SineTable512[];
|
|
extern const FIXP_STP SineTable480[];
|
|
|
|
/* AAC-LC windows */
|
|
extern const FIXP_WTP SineWindow1024[];
|
|
extern const FIXP_WTP KBDWindow1024[];
|
|
extern const FIXP_WTP SineWindow128[];
|
|
extern const FIXP_WTP KBDWindow128[];
|
|
|
|
extern const FIXP_WTP SineWindow960[];
|
|
extern const FIXP_WTP KBDWindow960[];
|
|
extern const FIXP_WTP SineWindow120[];
|
|
extern const FIXP_WTP KBDWindow120[];
|
|
|
|
/* AAC-LD windows */
|
|
extern const FIXP_WTP SineWindow512[];
|
|
#define LowOverlapWindow512 SineWindow128
|
|
extern const FIXP_WTP SineWindow480[];
|
|
#define LowOverlapWindow480 SineWindow120
|
|
|
|
|
|
|
|
extern const FIXP_WTP SineWindow64[];
|
|
extern const FIXP_WTP SineWindow32[];
|
|
|
|
/**
|
|
* \brief Helper table for window slope mapping. You should prefer the usage of the
|
|
* function FDKgetWindowSlope(), this table is only made public for some optimized
|
|
* access inside dct.cpp.
|
|
*/
|
|
extern const FIXP_WTP *const windowSlopes[2][3][9];
|
|
|
|
/**
|
|
* \brief Window slope access helper. Obtain a window of given length and shape.
|
|
* \param length Length of the window slope.
|
|
* \param shape Shape index of the window slope. 0: sine window, 1: Kaiser-Bessel. Any other
|
|
* value is applied a mask of 1 to, mapping it to either 0 or 1.
|
|
* \param Pointer to window slope or NULL if the requested window slope is not available.
|
|
*/
|
|
const FIXP_WTP * FDKgetWindowSlope(int length, int shape);
|
|
|
|
extern const FIXP_WTP sin_twiddle_L64[];
|
|
|
|
/*
|
|
* Filter coefficient type definition
|
|
*/
|
|
|
|
#if defined(ARCH_PREFER_MULT_16x16) || defined(ARCH_PREFER_MULT_32x16)
|
|
#define QMF_COEFF_16BIT
|
|
#endif
|
|
|
|
#define QMF_FILTER_PROTOTYPE_SIZE 640
|
|
#define QMF_NO_POLY 5
|
|
|
|
#ifdef QMF_COEFF_16BIT
|
|
#define FIXP_PFT FIXP_SGL
|
|
#define FIXP_QTW FIXP_SGL
|
|
#else
|
|
#define FIXP_PFT FIXP_DBL
|
|
#define FIXP_QTW FIXP_DBL
|
|
#endif
|
|
|
|
#define QMF640_PFT_TABLE_SIZE (640/2 + QMF_NO_POLY)
|
|
|
|
extern const FIXP_QTW qmf_phaseshift_cos32[32];
|
|
extern const FIXP_QTW qmf_phaseshift_sin32[32];
|
|
extern const FIXP_QTW qmf_phaseshift_cos64[64];
|
|
extern const FIXP_QTW qmf_phaseshift_sin64[64];
|
|
|
|
extern const FIXP_PFT qmf_64[QMF640_PFT_TABLE_SIZE+QMF_NO_POLY];
|
|
|
|
|
|
|
|
|
|
|
|
#define QMF640_CLDFB_PFT_TABLE_SIZE (640)
|
|
#define QMF320_CLDFB_PFT_TABLE_SIZE (320)
|
|
#define QMF_CLDFB_PFT_SCALE 1
|
|
|
|
extern const FIXP_QTW qmf_phaseshift_cos32_cldfb[32];
|
|
extern const FIXP_QTW qmf_phaseshift_sin32_cldfb[32];
|
|
extern const FIXP_QTW qmf_phaseshift_cos64_cldfb[64];
|
|
extern const FIXP_QTW qmf_phaseshift_sin64_cldfb[64];
|
|
|
|
extern const FIXP_PFT qmf_cldfb_640[QMF640_CLDFB_PFT_TABLE_SIZE];
|
|
extern const FIXP_PFT qmf_cldfb_320[QMF320_CLDFB_PFT_TABLE_SIZE];
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
* Raw Data Block list stuff.
|
|
*/
|
|
typedef enum {
|
|
element_instance_tag,
|
|
common_window,
|
|
global_gain,
|
|
ics_info, /* ics_reserved_bit, window_sequence, window_shape, max_sfb, scale_factor_grouping, predictor_data_present, ltp_data_present, ltp_data */
|
|
max_sfb,
|
|
ms, /* ms_mask_present, ms_used */
|
|
/*predictor_data_present,*/ /* part of ics_info */
|
|
ltp_data_present,
|
|
ltp_data,
|
|
section_data,
|
|
scale_factor_data,
|
|
pulse, /* pulse_data_present, pulse_data */
|
|
tns_data_present,
|
|
tns_data,
|
|
gain_control_data_present,
|
|
gain_control_data,
|
|
esc1_hcr,
|
|
esc2_rvlc,
|
|
spectral_data,
|
|
|
|
scale_factor_data_usac,
|
|
core_mode,
|
|
common_tw,
|
|
lpd_channel_stream,
|
|
tw_data,
|
|
noise,
|
|
ac_spectral_data,
|
|
fac_data,
|
|
tns_active, /* introduced in MPEG-D usac CD */
|
|
tns_data_present_usac,
|
|
common_max_sfb,
|
|
|
|
|
|
/* Non data list items */
|
|
adtscrc_start_reg1,
|
|
adtscrc_start_reg2,
|
|
adtscrc_end_reg1,
|
|
adtscrc_end_reg2,
|
|
drmcrc_start_reg,
|
|
drmcrc_end_reg,
|
|
next_channel,
|
|
next_channel_loop,
|
|
link_sequence,
|
|
end_of_sequence
|
|
} rbd_id_t;
|
|
|
|
struct element_list {
|
|
const rbd_id_t *id;
|
|
const struct element_list *next[2];
|
|
};
|
|
|
|
typedef struct element_list element_list_t;
|
|
/**
|
|
* \brief get elementary stream pieces list for given parameters.
|
|
* \param aot audio object type
|
|
* \param epConfig the epConfig value from the current Audio Specific Config
|
|
* \param nChannels amount of channels contained in the current element.
|
|
* \param layer the layer of the current element.
|
|
* \return element_list_t parser guidance structure.
|
|
*/
|
|
const element_list_t * getBitstreamElementList(AUDIO_OBJECT_TYPE aot, SCHAR epConfig, UCHAR nChannels, UCHAR layer);
|
|
|
|
|
|
#endif
|
|
|