2012-07-11 19:15:24 +02:00
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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2013-08-09 02:26:40 +02:00
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<EFBFBD> Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur F<EFBFBD>rderung der angewandten Forschung e.V.
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2012-07-11 19:15:24 +02:00
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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 that implements
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the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
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This FDK AAC Codec software is intended to be used on 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 general perceptual
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audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
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independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
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of the MPEG specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
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may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
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individually for the purpose of encoding or decoding bit streams in products that are compliant with
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the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
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these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
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software may already be covered under those patent licenses when it is used for those licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
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are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
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applications 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, are permitted without
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payment of copyright license fees provided that you satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
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your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation and/or other materials
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provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
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You must make available free of 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 from this library without
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prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
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software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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and the date of any change. For modified versions of the FDK AAC Codec, the term
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"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
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"Third-Party Modified Version of the Fraunhofer FDK 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 limitation the patents of Fraunhofer,
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ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
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respect to this software.
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You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
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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 holders and contributors
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"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
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of merchantability and 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, or consequential damages,
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including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
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or business interruption, 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 this software, even if
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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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/************************ Fraunhofer IIS SBR decoder library ******************
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Author(s):
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Description: SBR decoder front-end prototypes and definitions.
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******************************************************************************/
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#ifndef __SBRDECODER_H
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#define __SBRDECODER_H
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#include "common_fix.h"
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#include "FDK_bitstream.h"
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#include "FDK_audio.h"
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#define SBR_DEBUG_EXTHLP "\
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--- SBR ---\n\
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0x00000010 Ancillary data and SBR-Header\n\
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0x00000020 SBR-Side info\n\
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0x00000040 Decoded SBR-bitstream data, e.g. envelope data\n\
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0x00000080 SBR-Bitstream statistics\n\
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0x00000100 Miscellaneous SBR-messages\n\
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0x00000200 SBR-Energies and gains in the adjustor\n\
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0x00000400 Fatal SBR errors\n\
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0x00000800 Transposer coefficients for inverse filtering\n\
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"
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/* Capability flags */
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#define CAPF_SBR_LP 0x00000001 /*!< Flag indicating library's capability of Low Power mode. */
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#define CAPF_SBR_HQ 0x00000002 /*!< Flag indicating library's capability of High Quality mode. */
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#define CAPF_SBR_DRM_BS 0x00000004 /*!< Flag indicating library's capability to decode DRM SBR data. */
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#define CAPF_SBR_CONCEALMENT 0x00000008 /*!< Flag indicating library's capability to conceal erroneous frames. */
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#define CAPF_SBR_DRC 0x00000010 /*!< Flag indicating library's capability for Dynamic Range Control. */
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#define CAPF_SBR_PS_MPEG 0x00000020 /*!< Flag indicating library's capability to do MPEG Parametric Stereo. */
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#define CAPF_SBR_PS_DRM 0x00000040 /*!< Flag indicating library's capability to do DRM Parametric Stereo. */
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typedef enum
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{
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SBRDEC_OK = 0, /*!< All fine. */
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/* SBRDEC_CONCEAL, */
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/* SBRDEC_NOSYNCH, */
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/* SBRDEC_ILLEGAL_PROGRAM, */
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/* SBRDEC_ILLEGAL_TAG, */
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/* SBRDEC_ILLEGAL_CHN_CONFIG, */
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/* SBRDEC_ILLEGAL_SECTION, */
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/* SBRDEC_ILLEGAL_SCFACTORS, */
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/* SBRDEC_ILLEGAL_PULSE_DATA, */
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/* SBRDEC_MAIN_PROFILE_NOT_IMPLEMENTED, */
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/* SBRDEC_GC_NOT_IMPLEMENTED, */
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/* SBRDEC_ILLEGAL_PLUS_ELE_ID, */
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SBRDEC_CREATE_ERROR, /*!< */
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SBRDEC_NOT_INITIALIZED, /*!< */
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SBRDEC_MEM_ALLOC_FAILED, /*!< Memory allocation failed. Probably not enough memory available. */
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SBRDEC_PARSE_ERROR, /*!< */
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SBRDEC_UNSUPPORTED_CONFIG, /*!< */
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SBRDEC_SET_PARAM_FAIL /*!< */
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} SBR_ERROR;
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typedef enum
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{
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SBR_SYSTEM_BITSTREAM_DELAY, /*!< System: Switch to enable an additional SBR bitstream delay of one frame. */
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SBR_QMF_MODE, /*!< Set QMF mode, either complex or low power. */
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SBR_LD_QMF_TIME_ALIGN, /*!< Set QMF type, either LD-MPS or CLDFB. Relevant for ELD streams only. */
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2014-05-21 02:24:06 +02:00
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SBR_FLUSH_DATA, /*!< Set internal state to flush the decoder with the next process call. */
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SBR_CLEAR_HISTORY, /*!< Clear all internal states (delay lines, QMF states, ...). */
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2012-07-11 19:15:24 +02:00
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SBR_BS_INTERRUPTION /*!< Signal bit stream interruption. Value is ignored. */
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} SBRDEC_PARAM;
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typedef struct SBR_DECODER_INSTANCE *HANDLE_SBRDECODER;
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/**
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* \brief Allocates and initializes one SBR decoder instance.
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* \param pSelf Pointer to where a SBR decoder handle is copied into.
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* \return Error code.
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*/
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SBR_ERROR sbrDecoder_Open ( HANDLE_SBRDECODER *pSelf );
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/**
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* \brief Initialize a SBR decoder runtime instance. Must be called before decoding starts.
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*
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* \param self Handle to a SBR decoder instance.
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* \param sampleRateIn Input samplerate of the SBR decoder instance.
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* \param sampleRateOut Output samplerate of the SBR decoder instance.
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* \param samplesPerFrame Number of samples per frames.
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* \param coreCodec Audio Object Type (AOT) of the core codec.
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* \param elementID Table with MPEG-4 element Ids in canonical order.
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* \param forceReset Flag that enforces a complete decoder reset.
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*
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* \return Error code.
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*/
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SBR_ERROR sbrDecoder_InitElement (
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HANDLE_SBRDECODER self,
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const int sampleRateIn,
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const int sampleRateOut,
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const int samplesPerFrame,
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const AUDIO_OBJECT_TYPE coreCodec,
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const MP4_ELEMENT_ID elementID,
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const int elementIndex
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);
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/**
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* \brief pass out of band SBR header to SBR decoder
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*
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* \param self Handle to a SBR decoder instance.
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* \param hBs bit stream handle data source.
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* \param elementID SBR element ID.
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* \param elementIndex SBR element index.
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*
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* \return Error code.
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*/
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INT sbrDecoder_Header (
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HANDLE_SBRDECODER self,
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HANDLE_FDK_BITSTREAM hBs,
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const INT sampleRateIn,
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const INT sampleRateOut,
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const INT samplesPerFrame,
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const AUDIO_OBJECT_TYPE coreCodec,
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const MP4_ELEMENT_ID elementID,
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const INT elementIndex
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);
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/**
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* \brief Set a parameter of the SBR decoder runtime instance.
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* \param self SBR decoder handle.
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* \param param Parameter which will be set if successfull.
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* \param value New parameter value.
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* \return Error code.
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*/
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SBR_ERROR sbrDecoder_SetParam ( HANDLE_SBRDECODER self,
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const SBRDEC_PARAM param,
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const INT value );
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/**
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* \brief Feed DRC channel data into a SBR decoder runtime instance.
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*
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* \param self SBR decoder handle.
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* \param ch Channel number to which the DRC data is associated to.
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* \param numBands Number of DRC bands.
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* \param pNextFact_mag Pointer to a table with the DRC factor magnitudes.
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* \param nextFact_exp Exponent for all DRC factors.
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* \param drcInterpolationScheme DRC interpolation scheme.
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* \param winSequence Window sequence from core coder (eight short or one long window).
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* \param pBandTop Pointer to a table with the top borders for all DRC bands.
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*
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* \return Error code.
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*/
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SBR_ERROR sbrDecoder_drcFeedChannel ( HANDLE_SBRDECODER self,
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INT ch,
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UINT numBands,
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FIXP_DBL *pNextFact_mag,
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INT nextFact_exp,
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SHORT drcInterpolationScheme,
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UCHAR winSequence,
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USHORT *pBandTop );
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/**
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* \brief Disable SBR DRC for a certain channel.
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*
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* \param hSbrDecoder SBR decoder handle.
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* \param ch Number of the channel that has to be disabled.
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*
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* \return None.
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*/
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void sbrDecoder_drcDisable ( HANDLE_SBRDECODER self,
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INT ch );
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/**
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* \brief Parse one SBR element data extension data block. The bit stream position will
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* be placed at the end of the SBR payload block. The remaining bits will be returned
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* into *count if a payload length is given (byPayLen > 0). If no SBR payload length is
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* given (bsPayLen < 0) then the bit stream position on return will be random after this
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* function call in case of errors, and any further decoding will be completely pointless.
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*
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* \param self SBR decoder handle.
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* \param hBs Bit stream handle as data source.
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* \param count Pointer to an integer where the amount of parsed SBR payload bits is stored into.
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* \param bsPayLen If > 0 this value is the SBR payload length. If < 0, the SBR payload length is unknown.
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* \param flags CRC flag (0: EXT_SBR_DATA; 1: EXT_SBR_DATA_CRC)
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* \param prev_element Previous MPEG-4 element ID.
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* \param element_index Index of the current element.
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*
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* \return Error code.
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*/
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SBR_ERROR sbrDecoder_Parse (
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HANDLE_SBRDECODER self,
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HANDLE_FDK_BITSTREAM hBs,
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int *count,
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int bsPayLen,
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int crcFlag,
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MP4_ELEMENT_ID prev_element,
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int element_index,
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int fGlobalIndependencyFlag
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);
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/**
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* \brief This function decodes the given SBR bitstreams and applies SBR to the given time data.
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*
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* SBR-processing works InPlace. I.e. the calling function has to provide
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* a time domain buffer timeData which can hold the completely decoded
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* result.
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*
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* Left and right channel are read and stored according to the
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* interleaving flag, frame length and number of channels.
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*
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* \param self Handle of an open SBR decoder instance.
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* \param hSbrBs SBR Bitstream handle.
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* \param timeData Pointer to input and finally upsampled output data.
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* \param numChannels Pointer to a buffer holding the number of channels in time data buffer.
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* \param sampleRate Output samplerate.
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* \param channelMapping Channel mapping indices.
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* \param interleaved Flag indicating if time data is stored interleaved (1: Interleaved time data, 0: non-interleaved timedata).
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* \param coreDecodedOk Flag indicating if the core decoder did not find any error (0: core decoder found errors, 1: no errors).
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* \param psDecoded Pointer to a buffer holding a flag. Input: PS is possible, Output: PS has been rendered.
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*
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* \return Error code.
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*/
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SBR_ERROR sbrDecoder_Apply ( HANDLE_SBRDECODER self,
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INT_PCM *timeData,
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int *numChannels,
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int *sampleRate,
|
2013-12-28 01:13:22 +01:00
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const UCHAR channelMapping[(8)],
|
2012-07-11 19:15:24 +02:00
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const int interleaved,
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const int coreDecodedOk,
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UCHAR *psDecoded );
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/**
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* \brief Close SBR decoder instance and free memory.
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* \param self SBR decoder handle.
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* \return Error Code.
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*/
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SBR_ERROR sbrDecoder_Close ( HANDLE_SBRDECODER *self );
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/**
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* \brief Get SBR decoder library information.
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* \param info Pointer to a LIB_INFO struct, where library information is written to.
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* \return 0 on success, -1 if invalid handle or if no free element is available to write information to.
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*/
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INT sbrDecoder_GetLibInfo( LIB_INFO *info );
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#ifdef __cplusplus
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}
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#endif
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#endif
|
