mirror of https://github.com/mstorsjo/fdk-aac.git
190 lines
7.7 KiB
C
190 lines
7.7 KiB
C
/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2021 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 transport format decoder library *********************
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Author(s): Daniel Homm
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Description:
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*******************************************************************************/
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#ifndef TPDEC_LATM_H
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#define TPDEC_LATM_H
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#include "tpdec_lib.h"
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#include "FDK_bitstream.h"
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#define MIN_LATM_HEADERLENGTH 9
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#define MIN_LOAS_HEADERLENGTH MIN_LATM_HEADERLENGTH + 24 /* both in bits */
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#define MIN_TP_BUF_SIZE_LOAS (8194)
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enum {
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LATM_MAX_PROG = 1,
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LATM_MAX_LAYER = 1,
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LATM_MAX_VAR_CHUNKS = 16,
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LATM_MAX_ID = 16
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};
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typedef struct {
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UINT m_frameLengthType;
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UINT m_bufferFullness;
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UINT m_streamID;
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UINT m_frameLengthInBits;
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} LATM_LAYER_INFO;
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typedef struct {
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LATM_LAYER_INFO m_linfo[LATM_MAX_PROG][LATM_MAX_LAYER];
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UINT m_taraBufferFullness;
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UINT m_otherDataLength;
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UINT m_audioMuxLengthBytes; /* Length of LOAS payload */
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UCHAR m_useSameStreamMux;
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UCHAR m_AudioMuxVersion;
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UCHAR m_AudioMuxVersionA;
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UCHAR m_allStreamsSameTimeFraming;
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UCHAR m_noSubFrames;
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UCHAR m_numProgram;
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UCHAR m_numLayer[LATM_MAX_PROG];
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UCHAR m_otherDataPresent;
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UCHAR m_crcCheckPresent;
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SCHAR BufferFullnessAchieved;
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UCHAR
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usacExplicitCfgChanged; /* explicit config in case of USAC and LOAS/LATM
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must be compared to IPF cfg */
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UCHAR applyAsc; /* apply ASC immediate without flushing */
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UCHAR newCfgHasAudioPreRoll; /* the new (dummy parsed) config has an
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AudioPreRoll */
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} CLatmDemux;
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TRANSPORTDEC_ERROR CLatmDemux_Read(HANDLE_FDK_BITSTREAM bs,
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CLatmDemux *pLatmDemux, TRANSPORT_TYPE tt,
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CSTpCallBacks *pTpDecCallbacks,
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CSAudioSpecificConfig *pAsc,
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int *pfConfigFound,
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const INT ignoreBufferFullness);
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/**
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* \brief Read StreamMuxConfig
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* \param bs bit stream handle as data source
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* \param pLatmDemux pointer to CLatmDemux struct of current LATM context
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* \param pTpDecCallbacks Call back structure for configuration callbacks
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* \param pAsc pointer to a ASC for configuration storage
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* \param pfConfigFound pointer to a flag which is set to 1 if a configuration
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* was found and processed successfully
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* \param configMode Config modes: memory allocation mode or config change
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* detection mode
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* \param configChanged Indicates a config change
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* \return error code
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*/
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TRANSPORTDEC_ERROR CLatmDemux_ReadStreamMuxConfig(
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HANDLE_FDK_BITSTREAM bs, CLatmDemux *pLatmDemux,
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CSTpCallBacks *pTpDecCallbacks, CSAudioSpecificConfig *pAsc,
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int *pfConfigFound, UCHAR configMode, UCHAR configChanged);
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TRANSPORTDEC_ERROR CLatmDemux_ReadPayloadLengthInfo(HANDLE_FDK_BITSTREAM bs,
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CLatmDemux *pLatmDemux);
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UINT CLatmDemux_GetFrameLengthInBits(CLatmDemux *pLatmDemux, const UINT prog,
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const UINT layer);
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UINT CLatmDemux_GetOtherDataPresentFlag(CLatmDemux *pLatmDemux);
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UINT CLatmDemux_GetOtherDataLength(CLatmDemux *pLatmDemux);
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UINT CLatmDemux_GetNrOfSubFrames(CLatmDemux *pLatmDemux);
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UINT CLatmDemux_GetNrOfLayers(CLatmDemux *pLatmDemux, const UINT program);
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#endif /* TPDEC_LATM_H */
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