mirror of https://github.com/mstorsjo/fdk-aac.git
297 lines
14 KiB
C
297 lines
14 KiB
C
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/* -----------------------------------------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
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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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/************************** MPEG-4 Transport Encoder ************************
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Author(s): Manuel Jander
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Description: MPEG Transport encode
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******************************************************************************/
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#ifndef __TPENC_LIB_H__
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#define __TPENC_LIB_H__
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#include "tp_data.h"
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#include "FDK_bitstream.h"
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#define TRANSPORTENC_INBUF_SIZE 8192
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typedef enum {
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TRANSPORTENC_OK = 0, /*!< All fine. */
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TRANSPORTENC_NO_MEM, /*!< Out of memory. */
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TRANSPORTENC_UNKOWN_ERROR = 1, /*!< Unknown error (embarrasing). */
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TRANSPORTENC_INVALID_PARAMETER, /*!< An invalid parameter was passed to a function . */
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TRANSPORTENC_PARSE_ERROR, /*!< Bitstream data contained inconsistencies (wrong syntax). */
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TRANSPORTENC_UNSUPPORTED_FORMAT, /*!< Unsupported transport format. */
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TRANSPORTENC_NOT_ENOUGH_BITS, /*!< Out of bits. Provide more bits and try again. */
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TRANSPORTENC_INVALID_CONFIG, /*!< Error in configuration. */
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TRANSPORTENC_LATM_INVALID_NR_OF_SUBFRAMES, /*!< LATM: number of subframes out of range. */
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TRANSPORTENC_LOAS_NOT_AVAILABLE, /*!< LOAS format not supported. */
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TRANSPORTENC_INVALID_LATM_ALIGNMENT, /*!< AudioMuxElement length not aligned to 1 byte. */
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TRANSPORTENC_INVALID_TRANSMISSION_FRAME_LENGTH, /*!< Invalid transmission frame length (< 0). */
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TRANSPORTENC_INVALID_CELP_FRAME_LENGTH, /*!< Invalid CELP frame length found (>= 62). */
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TRANSPORTENC_INVALID_FRAME_BITS, /*!< Frame bits is not 40 and not 80. */
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TRANSPORTENC_INVALID_AOT, /*!< Unknown AOT found. */
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TRANSPORTENC_INVALID_AU_LENGTH /*!< Invalid Access Unit length (not byte-aligned). */
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} TRANSPORTENC_ERROR;
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typedef struct TRANSPORTENC *HANDLE_TRANSPORTENC;
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/**
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* \brief Determine a reasonable channel configuration on the basis of channel_mode.
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* \param noChannels Number of audio channels.
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* \return CHANNEL_MODE value that matches the given amount of audio channels.
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*/
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CHANNEL_MODE transportEnc_GetChannelMode( int noChannels );
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/**
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* \brief Register SBR heaqder writer callback.
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* \param hTp Handle of transport decoder.
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* \param cbUpdateConfig Pointer to a callback function to handle SBR header writing.
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* \param user_data void pointer for user data passed to the callback as first parameter.
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* \return 0 on success.
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*/
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int transportEnc_RegisterSbrCallback (
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HANDLE_TRANSPORTENC hTpEnc,
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const cbSbr_t cbSbr,
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void* user_data
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);
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/**
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* \brief Register SSC writer callback.
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* \param hTp Handle of transport decoder.
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* \param cbUpdateConfig Pointer to a callback function to handle SSC writing.
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* \param user_data void pointer for user data passed to the callback as first parameter.
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* \return 0 on success.
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*/
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int transportEnc_RegisterSscCallback (
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HANDLE_TRANSPORTENC hTpEnc,
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const cbSsc_t cbSsc,
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void* user_data
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);
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/**
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* \brief Write ASC from given parameters.
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* \param asc A HANDLE_FDK_BITSTREAM where the ASC is written to.
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* \param config Structure containing the codec configuration settings.
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* \param cb callback information structure.
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* \return 0 on success.
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*/
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int transportEnc_writeASC (
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HANDLE_FDK_BITSTREAM asc,
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CODER_CONFIG *config,
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CSTpCallBacks *cb
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);
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/* Defintion of flags that can be passed to transportEnc_Open() */
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#define TP_FLAG_MPEG4 1 /** MPEG4 (instead of MPEG2) */
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#define TP_FLAG_LATM_AMV 2 /** LATM AudioMuxVersion */
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#define TP_FLAG_LATM_AMVA 4 /** LATM AudioMuxVersionA */
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/**
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* \brief Allocate transport encoder.
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* \param phTpEnc Pointer to transport encoder handle.
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* \return Error code.
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*/
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TRANSPORTENC_ERROR transportEnc_Open( HANDLE_TRANSPORTENC *phTpEnc );
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/**
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* \brief Init transport encoder.
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* \param bsBuffer Pointer to transport encoder.
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* \param bsBuffer Pointer to bitstream buffer.
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* \param bsBufferSize Size in bytes of bsBuffer.
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* \param transportFmt Format of the transport to be written.
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* \param config Pointer to a valid CODER_CONFIG struct.
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* \param flags Transport encoder flags.
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* \return Error code.
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*/
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TRANSPORTENC_ERROR transportEnc_Init(
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HANDLE_TRANSPORTENC hTpEnc,
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UCHAR *bsBuffer,
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INT bsBufferSize,
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TRANSPORT_TYPE transportFmt,
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CODER_CONFIG *config,
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UINT flags
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);
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/**
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* \brief Get transport encoder bitstream.
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* \param hTp Pointer to a transport encoder handle.
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* \return The handle to the requested FDK bitstream.
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*/
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HANDLE_FDK_BITSTREAM transportEnc_GetBitstream( HANDLE_TRANSPORTENC hTp );
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/**
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* \brief Get amount of bits required by the transport headers.
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* \param hTp Handle of transport encoder.
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* \param auBits Amount of payload bits required for the current subframe.
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* \return Error code.
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*/
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INT transportEnc_GetStaticBits( HANDLE_TRANSPORTENC hTp, int auBits );
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/**
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* \brief Close transport encoder. This function assures that all allocated memory is freed.
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* \param phTp Pointer to a previously allocated transport encoder handle.
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*/
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void transportEnc_Close( HANDLE_TRANSPORTENC *phTp );
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/**
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* \brief Write one access unit.
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* \param hTp Handle of transport encoder.
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* \param total_bits Amount of total access unit bits.
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* \param bufferFullness Value of current buffer fullness in bits.
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* \param noConsideredChannels Number of bitrate wise considered channels (all minus LFE channels).
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* \return Error code.
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*/
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TRANSPORTENC_ERROR transportEnc_WriteAccessUnit( HANDLE_TRANSPORTENC hTp,
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INT total_bits,
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int bufferFullness,
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int noConsideredChannels );
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/**
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* \brief Inform the transportEnc layer that writing of access unit has finished. This function
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* is required to be called when the encoder has finished writing one Access
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* one Access Unit for bitstream housekeeping.
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* \param hTp Transport handle.
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* \param pBits Pointer to an int, where the current amount of frame bits is passed
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* and where the current amount of subframe bits is returned.
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*
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* OR: This integer is modified by the amount of extra bit alignment that may occurr.
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*
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* \return Error code.
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*/
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TRANSPORTENC_ERROR transportEnc_EndAccessUnit( HANDLE_TRANSPORTENC hTp, int *pBits);
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/*
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* \brief Get a payload frame.
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* \param hTpEnc Transport encoder handle.
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* \param nBytes Pointer to an int to hold the frame size in bytes. Returns zero
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* if currently there is no complete frame for output (number of sub frames > 1).
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* \return Error code.
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*/
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TRANSPORTENC_ERROR transportEnc_GetFrame(HANDLE_TRANSPORTENC hTpEnc, int *nbytes);
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/* ADTS CRC support */
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/**
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* \brief Set current bitstream position as start of a new data region.
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* \param hTpEnc Transport encoder handle.
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* \param mBits Size in bits of the data region. Set to 0 if it should not be of a fixed size.
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* \return Data region ID, which should be used when calling transportEnc_CrcEndReg().
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*/
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int transportEnc_CrcStartReg(HANDLE_TRANSPORTENC hTpEnc, int mBits);
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/**
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* \brief Set end of data region.
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* \param hTpEnc Transport encoder handle.
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* \param reg Data region ID, opbtained from transportEnc_CrcStartReg().
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* \return void
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*/
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void transportEnc_CrcEndReg(HANDLE_TRANSPORTENC hTpEnc, int reg);
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/**
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* \brief Get AudioSpecificConfig or StreamMuxConfig from transport encoder handle and write it to dataBuffer.
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* \param hTpEnc Transport encoder handle.
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* \param cc Pointer to the current and valid configuration contained in a CODER_CONFIG struct.
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* \param dataBuffer Bitbuffer holding binary configuration.
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* \param confType Pointer to an UINT where the configuration type is returned (0:ASC, 1:SMC).
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* \return Error code.
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*/
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TRANSPORTENC_ERROR transportEnc_GetConf( HANDLE_TRANSPORTENC hTpEnc,
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CODER_CONFIG *cc,
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FDK_BITSTREAM *dataBuffer,
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UINT *confType );
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/**
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* \brief Get information (version among other things) of the transport encoder library.
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* \param info Pointer to an allocated LIB_INFO struct.
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* \return Error code.
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*/
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TRANSPORTENC_ERROR transportEnc_GetLibInfo( LIB_INFO *info );
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#endif /* #ifndef __TPENC_LIB_H__ */
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