185 lines
8.0 KiB
C
185 lines
8.0 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 encoder library ******************************
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Author(s): M. Werner
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Description: Bitstream encoder
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*******************************************************************************/
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#ifndef BITENC_H
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#define BITENC_H
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#include "qc_data.h"
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#include "aacenc_tns.h"
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#include "channel_map.h"
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#include "interface.h" /* obsolete, when PSY_OUT is thrown out of the WritBS-call! */
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#include "FDK_audio.h"
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#include "aacenc.h"
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#include "tpenc_lib.h"
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typedef enum {
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MAX_ENCODER_CHANNELS = 9,
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MAX_BLOCK_TYPES = 4,
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MAX_AAC_LAYERS = 9,
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MAX_LAYERS = MAX_AAC_LAYERS, /* only one core layer if present */
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FIRST_LAY = 1 /* default layer number for AAC nonscalable */
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} _MAX_CONST;
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#define BUFFER_MX_HUFFCB_SIZE \
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(32 * sizeof(INT)) /* our FDK_bitbuffer needs size of power 2 */
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#define EL_ID_BITS (3)
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/**
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* \brief Arbitrary order bitstream writer. This function can either assemble a
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* bit stream and write into the bit buffer of hTpEnc or calculate the number of
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* static bits (signal independent) TpEnc handle must be NULL in this
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* case. Or also Calculate the minimum possible number of static bits
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* which by disabling all tools e.g. MS, TNS and sbfCnt=0. The minCnt
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* parameter has to be 1 in this latter case.
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* \param hTpEnc Transport encoder handle. If NULL, the number of static bits
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* will be returned into *pBitDemand.
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* \param pElInfo
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* \param qcOutChannel
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* \param hReorderInfo
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* \param psyOutElement
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* \param psyOutChannel
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* \param syntaxFlags Bit stream syntax flags as defined in FDK_audio.h (Audio
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* Codec flags).
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* \param aot
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* \param epConfig
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* \param pBitDemand Pointer to an int where the amount of bits is returned
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* into. The returned value depends on if hTpEnc is NULL and minCnt.
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* \param minCnt If non-zero the value returned into *pBitDemand is the absolute
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* minimum required amount of static bits in order to write a valid bit stream.
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* \return AAC_ENCODER_ERROR error code
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*/
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AAC_ENCODER_ERROR FDKaacEnc_ChannelElementWrite(
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HANDLE_TRANSPORTENC hTpEnc, ELEMENT_INFO *pElInfo,
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QC_OUT_CHANNEL *qcOutChannel[(2)], PSY_OUT_ELEMENT *psyOutElement,
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PSY_OUT_CHANNEL *psyOutChannel[(2)], UINT syntaxFlags,
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AUDIO_OBJECT_TYPE aot, SCHAR epConfig, INT *pBitDemand, UCHAR minCnt);
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/**
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* \brief Write bit stream or account static bits
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* \param hTpEnc transport encoder handle. If NULL, the function will
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* not write any bit stream data but only count the amount
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* of static (signal independent) bits
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* \param channelMapping Channel mapping info
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* \param qcOut
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* \param psyOut
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* \param qcKernel
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* \param hBSE
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* \param aot Audio Object Type being encoded
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* \param syntaxFlags Flags indicating format specific detail
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* \param epConfig Error protection config
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*/
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AAC_ENCODER_ERROR FDKaacEnc_WriteBitstream(HANDLE_TRANSPORTENC hTpEnc,
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CHANNEL_MAPPING *channelMapping,
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QC_OUT *qcOut, PSY_OUT *psyOut,
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QC_STATE *qcKernel,
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AUDIO_OBJECT_TYPE aot,
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UINT syntaxFlags, SCHAR epConfig);
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INT FDKaacEnc_writeExtensionData(HANDLE_TRANSPORTENC hTpEnc,
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QC_OUT_EXTENSION *pExtension,
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INT elInstanceTag, UINT alignAnchor,
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UINT syntaxFlags, AUDIO_OBJECT_TYPE aot,
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SCHAR epConfig);
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#endif /* BITENC_H */
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