mirror of https://github.com/mstorsjo/fdk-aac.git
215 lines
8.3 KiB
C
215 lines
8.3 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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/*********************** MPEG surround encoder library *************************
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Author(s): M. Multrus
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Description: Parameter Extraction
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*******************************************************************************/
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#ifndef SACENC_PARAMEXTRACT_H
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#define SACENC_PARAMEXTRACT_H
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/* Includes ******************************************************************/
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#include "common_fix.h"
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#include "sacenc_lib.h"
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#include "sacenc_const.h"
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#include "sacenc_bitstream.h"
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/* Defines *******************************************************************/
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#define MAX_CLD_QUANT_FINE (31)
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#define MAX_CLD_QUANT_COARSE (15)
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#define OFFSET_CLD_QUANT_COARSE (7)
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#define OFFSET_CLD_QUANT_FINE (15)
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#define MAX_ICC_QUANT_COARSE (4)
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#define MAX_ICC_QUANT_FINE (8)
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#define OFFSET_ICC_QUANT_COARSE (0)
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#define OFFSET_ICC_QUANT_FINE (0)
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#define MAX_NUM_PARAM_BANDS (28)
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#define NUM_MAPPED_HYBRID_BANDS (16)
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/* Data Types ****************************************************************/
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typedef struct T_TTO_BOX *HANDLE_TTO_BOX;
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typedef enum {
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BOX_SUBBANDS_INVALID = 0,
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BOX_SUBBANDS_4 = 4,
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BOX_SUBBANDS_5 = 5,
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BOX_SUBBANDS_7 = 7,
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BOX_SUBBANDS_9 = 9,
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BOX_SUBBANDS_12 = 12,
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BOX_SUBBANDS_15 = 15,
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BOX_SUBBANDS_23 = 23
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} BOX_SUBBAND_CONFIG;
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typedef enum {
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BOX_QUANTMODE_INVALID = -1,
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BOX_QUANTMODE_FINE = 0,
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BOX_QUANTMODE_EBQ1 = 1,
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BOX_QUANTMODE_EBQ2 = 2,
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BOX_QUANTMODE_RESERVED3 = 3,
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BOX_QUANTMODE_RESERVED4 = 4,
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BOX_QUANTMODE_RESERVED5 = 5,
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BOX_QUANTMODE_RESERVED6 = 6,
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BOX_QUANTMODE_RESERVED7 = 7
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} BOX_QUANTMODE;
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typedef struct T_TTO_BOX_CONFIG {
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UCHAR bUseCoarseQuantCld;
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UCHAR bUseCoarseQuantIcc;
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UCHAR bUseCoherenceIccOnly;
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BOX_SUBBAND_CONFIG subbandConfig;
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BOX_QUANTMODE boxQuantMode;
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UCHAR nHybridBandsMax;
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UCHAR bFrameKeep;
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} TTO_BOX_CONFIG;
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/* Constants *****************************************************************/
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/* Function / Class Declarations *********************************************/
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FDK_SACENC_ERROR fdk_sacenc_createTtoBox(HANDLE_TTO_BOX *hTtoBox);
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FDK_SACENC_ERROR fdk_sacenc_initTtoBox(HANDLE_TTO_BOX hTtoBox,
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const TTO_BOX_CONFIG *const ttoBoxConfig,
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UCHAR *pParameterBand2HybridBandOffset);
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FDK_SACENC_ERROR fdk_sacenc_destroyTtoBox(HANDLE_TTO_BOX *hTtoBox);
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FDK_SACENC_ERROR fdk_sacenc_applyTtoBox(
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HANDLE_TTO_BOX hTtoBox, const INT nTimeSlots, const INT startTimeSlot,
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const INT nHybridBands, const FIXP_DPK *const *const ppHybridData1__FDK,
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const FIXP_DPK *const *const ppHybridData2__FDK, SCHAR *const pIccIdx,
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UCHAR *const pbIccQuantCoarse, SCHAR *const pCldIdx,
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UCHAR *const pbCldQuantCoarse, const INT bUseBBCues, INT *scaleCh0,
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INT *scaleCh1);
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INT fdk_sacenc_subband2ParamBand(const BOX_SUBBAND_CONFIG boxSubbandConfig,
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const INT nSubband);
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const INT *fdk_sacenc_getSubbandImagSign();
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void fdk_sacenc_calcParameterBand2HybridBandOffset(
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const BOX_SUBBAND_CONFIG subbandConfig, const INT nHybridBands,
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UCHAR *pParameterBand2HybridBandOffset);
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/* Function / Class Definition ***********************************************/
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static inline UCHAR fdk_sacenc_getCldQuantOffset(const INT bUseCoarseQuant) {
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return ((bUseCoarseQuant) ? OFFSET_CLD_QUANT_COARSE : OFFSET_CLD_QUANT_FINE);
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}
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static inline UCHAR fdk_sacenc_getIccQuantOffset(const INT bUseCoarseQuant) {
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return ((bUseCoarseQuant) ? OFFSET_ICC_QUANT_COARSE : OFFSET_ICC_QUANT_FINE);
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}
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static inline UCHAR fdk_sacenc_getNumberCldQuantLevels(
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const INT bUseCoarseQuant) {
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return ((bUseCoarseQuant) ? MAX_CLD_QUANT_COARSE : MAX_CLD_QUANT_FINE);
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}
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static inline UCHAR fdk_sacenc_getNumberIccQuantLevels(
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const INT bUseCoarseQuant) {
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return ((bUseCoarseQuant) ? MAX_ICC_QUANT_COARSE : MAX_ICC_QUANT_FINE);
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}
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#endif /* SACENC_PARAMEXTRACT_H */
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