| |
| /* ----------------------------------------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. |
| All rights reserved. |
| |
| 1. INTRODUCTION |
| The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements |
| the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. |
| This FDK AAC Codec software is intended to be used on a wide variety of Android devices. |
| |
| AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual |
| audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by |
| independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part |
| of the MPEG specifications. |
| |
| Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) |
| may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners |
| individually for the purpose of encoding or decoding bit streams in products that are compliant with |
| the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license |
| these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec |
| software may already be covered under those patent licenses when it is used for those licensed purposes only. |
| |
| Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, |
| are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional |
| applications information and documentation. |
| |
| 2. COPYRIGHT LICENSE |
| |
| Redistribution and use in source and binary forms, with or without modification, are permitted without |
| payment of copyright license fees provided that you satisfy the following conditions: |
| |
| You must retain the complete text of this software license in redistributions of the FDK AAC Codec or |
| your modifications thereto in source code form. |
| |
| You must retain the complete text of this software license in the documentation and/or other materials |
| provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. |
| You must make available free of charge copies of the complete source code of the FDK AAC Codec and your |
| modifications thereto to recipients of copies in binary form. |
| |
| The name of Fraunhofer may not be used to endorse or promote products derived from this library without |
| prior written permission. |
| |
| You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec |
| software or your modifications thereto. |
| |
| Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software |
| and the date of any change. For modified versions of the FDK AAC Codec, the term |
| "Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term |
| "Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." |
| |
| 3. NO PATENT LICENSE |
| |
| NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, |
| ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with |
| respect to this software. |
| |
| You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized |
| by appropriate patent licenses. |
| |
| 4. DISCLAIMER |
| |
| This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors |
| "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties |
| of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR |
| CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, |
| including but not limited to procurement of substitute goods or services; loss of use, data, or profits, |
| or business interruption, however caused and on any theory of liability, whether in contract, strict |
| liability, or tort (including negligence), arising in any way out of the use of this software, even if |
| advised of the possibility of such damage. |
| |
| 5. CONTACT INFORMATION |
| |
| Fraunhofer Institute for Integrated Circuits IIS |
| Attention: Audio and Multimedia Departments - FDK AAC LL |
| Am Wolfsmantel 33 |
| 91058 Erlangen, Germany |
| |
| www.iis.fraunhofer.de/amm |
| amm-info@iis.fraunhofer.de |
| ----------------------------------------------------------------------------------------------------------- */ |
| |
| /***************************** MPEG-4 AAC Encoder ************************** |
| |
| Author(s): |
| Description: |
| |
| ******************************************************************************/ |
| |
| #ifndef TPENC_LATM_H |
| #define TPENC_LATM_H |
| |
| |
| |
| #include "tpenc_lib.h" |
| #include "FDK_bitstream.h" |
| |
| |
| #define DEFAULT_LATM_NR_OF_SUBFRAMES 1 |
| #define DEFAULT_LATM_SMC_REPEAT 8 |
| |
| #define MAX_AAC_LAYERS 9 |
| |
| #define LATM_MAX_PROGRAMS 1 |
| #define LATM_MAX_STREAM_ID 16 |
| |
| #define LATM_MAX_LAYERS 1 /*MAX_AAC_LAYERS*/ |
| |
| #define MAX_NR_OF_SUBFRAMES 2 /* set this carefully to avoid buffer overflows */ |
| |
| typedef enum { LATMVAR_SIMPLE_SEQUENCE } LATM_VAR_MODE; |
| |
| typedef struct { |
| signed int frameLengthType; |
| signed int frameLengthBits; |
| signed int varFrameLengthTable[4]; |
| signed int streamID; |
| } LATM_LAYER_INFO; |
| |
| |
| typedef struct { |
| LATM_LAYER_INFO m_linfo[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS]; |
| CODER_CONFIG *config[LATM_MAX_PROGRAMS][LATM_MAX_LAYERS]; |
| |
| LATM_VAR_MODE varMode; |
| TRANSPORT_TYPE tt; |
| |
| int audioMuxLengthBytes; |
| |
| int audioMuxLengthBytesPos; |
| int taraBufferFullness; /* state of the bit reservoir */ |
| int varStreamCnt; |
| unsigned int otherDataLenBytes; |
| |
| UCHAR latmFrameCounter; /* Current frame number. Counts modulo muxConfigPeriod */ |
| UCHAR muxConfigPeriod; /* Distance in frames between MuxConfig */ |
| |
| UCHAR audioMuxVersion; /* AMV1 supports transmission of taraBufferFullness and ASC lengths */ |
| UCHAR audioMuxVersionA; /* for future extensions */ |
| |
| UCHAR noProgram; |
| UCHAR noLayer[LATM_MAX_PROGRAMS]; |
| UCHAR fractDelayPresent; |
| |
| UCHAR allStreamsSameTimeFraming; |
| UCHAR subFrameCnt; /* Current Subframe frame */ |
| UCHAR noSubframes; /* Number of subframes */ |
| UINT latmSubframeStart; /* Position of current subframe start */ |
| UCHAR noSubframes_next; |
| |
| UCHAR fillBits; /* AudioMuxElement fill bits */ |
| UCHAR streamMuxConfigBits; |
| |
| } LATM_STREAM; |
| |
| typedef LATM_STREAM *HANDLE_LATM_STREAM; |
| |
| /** |
| * \brief Initialize LATM_STREAM Handle. Creates automatically one program with one layer with |
| * the given layerConfig. The layerConfig must be persisten because references to this pointer |
| * are made at any time again. |
| * Use transportEnc_Latm_AddLayer() to add more programs/layers. |
| * |
| * \param hLatmStreamInfo HANDLE_LATM_STREAM handle |
| * \param hBs Bitstream handle |
| * \param layerConfig a valid CODER_CONFIG struct containing the current audio configuration parameters |
| * \param audioMuxVersion the LATM audioMuxVersion to be used |
| * \param tt the specific TRANSPORT_TYPE to be used, either TT_MP4_LOAS, TT_MP4_LATM_MCP1 or TT_MP4_LATM_MCP0 LOAS |
| * \param cb callback information structure. |
| * |
| * \return an TRANSPORTENC_ERROR error code |
| */ |
| TRANSPORTENC_ERROR transportEnc_Latm_Init( |
| HANDLE_LATM_STREAM hLatmStreamInfo, |
| HANDLE_FDK_BITSTREAM hBs, |
| CODER_CONFIG *layerConfig, |
| UINT audioMuxVersion, |
| TRANSPORT_TYPE tt, |
| CSTpCallBacks *cb |
| ); |
| |
| /** |
| * \brief Get bit demand of next LATM/LOAS header |
| * |
| * \param hAss HANDLE_LATM_STREAM handle |
| * \param streamDataLength the length of the payload |
| * |
| * \return the number of bits required by the LATM/LOAS headers |
| */ |
| unsigned int transportEnc_LatmCountTotalBitDemandHeader ( |
| HANDLE_LATM_STREAM hAss, |
| unsigned int streamDataLength |
| ); |
| |
| /** |
| * \brief Write LATM/LOAS header into given bitstream handle |
| * |
| * \param hLatmStreamInfo HANDLE_LATM_STREAM handle |
| * \param hBitstream Bitstream handle |
| * \param auBits amount of current payload bits |
| * \param bufferFullness LATM buffer fullness value |
| * \param cb callback information structure. |
| * |
| * \return an TRANSPORTENC_ERROR error code |
| */ |
| TRANSPORTENC_ERROR |
| transportEnc_LatmWrite ( |
| HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBitstream, |
| int auBits, |
| int bufferFullness, |
| CSTpCallBacks *cb |
| ); |
| |
| /** |
| * \brief Adjust bit count relative to current subframe |
| * |
| * \param hAss HANDLE_LATM_STREAM handle |
| * \param pBits pointer to an int, where the current frame bit count is contained, |
| * and where the subframe relative bit count will be returned into |
| * |
| * \return void |
| */ |
| void transportEnc_LatmAdjustSubframeBits(HANDLE_LATM_STREAM hAss, |
| int *pBits); |
| |
| /** |
| * \brief Request an LATM frame, which may, or may not be available |
| * |
| * \param hAss HANDLE_LATM_STREAM handle |
| * \param hBs Bitstream handle |
| * \param pBytes pointer to an int, where the current frame byte count stored into. |
| * A return value of zero means that currently no LATM/LOAS frame can be returned. |
| * The latter is expected in case of multiple subframes being used. |
| * |
| * \return void |
| */ |
| void transportEnc_LatmGetFrame( |
| HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| int *pBytes |
| ); |
| |
| /** |
| * \brief Write a StreamMuxConfig into the given bitstream handle |
| * |
| * \param hAss HANDLE_LATM_STREAM handle |
| * \param hBs Bitstream handle |
| * \param bufferFullness LATM buffer fullness value |
| * \param cb callback information structure. |
| * |
| * \return void |
| */ |
| TRANSPORTENC_ERROR |
| CreateStreamMuxConfig( |
| HANDLE_LATM_STREAM hAss, |
| HANDLE_FDK_BITSTREAM hBs, |
| int bufferFullness, |
| CSTpCallBacks *cb |
| ); |
| |
| |
| #endif /* TPENC_LATM_H */ |
