| /* ----------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2018 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 |
| ----------------------------------------------------------------------------- */ |
| |
| /**************************** AAC encoder library ****************************** |
| |
| Author(s): M. Neusinger |
| |
| Description: Compressor for AAC Metadata Generator |
| |
| *******************************************************************************/ |
| |
| #ifndef METADATA_COMPRESSOR_H |
| #define METADATA_COMPRESSOR_H |
| |
| #include "FDK_audio.h" |
| #include "common_fix.h" |
| |
| #include "aacenc.h" |
| |
| #define LFE_LEV_SCALE 2 |
| |
| /** |
| * DRC compression profiles. |
| */ |
| typedef enum DRC_PROFILE { |
| DRC_NONE = 0, |
| DRC_FILMSTANDARD = 1, |
| DRC_FILMLIGHT = 2, |
| DRC_MUSICSTANDARD = 3, |
| DRC_MUSICLIGHT = 4, |
| DRC_SPEECH = 5, |
| DRC_DELAY_TEST = 6, |
| DRC_NOT_PRESENT = -2 |
| |
| } DRC_PROFILE; |
| |
| /** |
| * DRC Compressor handle. |
| */ |
| typedef struct DRC_COMP DRC_COMP, *HDRC_COMP; |
| |
| /** |
| * \brief Open a DRC Compressor instance. |
| * |
| * Allocate memory for a compressor instance. |
| * |
| * \param phDrcComp A pointer to a compressor handle. Initialized on |
| * return. |
| * |
| * \return |
| * - 0, on succes. |
| * - unequal 0, on failure. |
| */ |
| INT FDK_DRC_Generator_Open(HDRC_COMP *phDrcComp); |
| |
| /** |
| * \brief Close the DRC Compressor instance. |
| * |
| * Deallocate instance and free whole memory. |
| * |
| * \param phDrcComp Pointer to the compressor handle to be |
| * deallocated. |
| * |
| * \return |
| * - 0, on succes. |
| * - unequal 0, on failure. |
| */ |
| INT FDK_DRC_Generator_Close(HDRC_COMP *phDrcComp); |
| |
| /** |
| * \brief Configure DRC Compressor. |
| * |
| * \param drcComp Compressor handle. |
| * \param profileLine DRC profile for line mode. |
| * \param profileRF DRC profile for RF mode. |
| * \param blockLength Length of processing block in samples per |
| * channel. |
| * \param sampleRate Sampling rate in Hz. |
| * \param channelMode Channel configuration. |
| * \param channelOrder Channel order, MPEG or WAV. |
| * \param useWeighting Use weighting filter for loudness calculation |
| * |
| * \return |
| * - 0, on success, |
| * - unequal 0, on failure |
| */ |
| INT FDK_DRC_Generator_Initialize(HDRC_COMP drcComp, |
| const DRC_PROFILE profileLine, |
| const DRC_PROFILE profileRF, |
| const INT blockLength, const UINT sampleRate, |
| const CHANNEL_MODE channelMode, |
| const CHANNEL_ORDER channelOrder, |
| const UCHAR useWeighting); |
| |
| /** |
| * \brief Calculate DRC Compressor Gain. |
| * |
| * \param drcComp Compressor handle. |
| * \param inSamples Pointer to interleaved input audio samples. |
| * \param inSamplesBufSize Size of inSamples for one channel. |
| * \param dialnorm Dialog Level in dB (typically -31...-1). |
| * \param drc_TargetRefLevel |
| * \param comp_TargetRefLevel |
| * \param clev Downmix center mix factor (typically 0.707, |
| * 0.595 or 0.5) |
| * \param slev Downmix surround mix factor (typically 0.707, |
| * 0.5, or 0) |
| * \param ext_leva Downmix gain factor A |
| * \param ext_levb Downmix gain factor B |
| * \param lfe_lev LFE gain factor |
| * \param dmxGain5 Gain factor for downmix to 5 channels |
| * \param dmxGain2 Gain factor for downmix to 2 channels |
| * \param dynrng Pointer to variable receiving line mode DRC gain |
| * in dB |
| * \param compr Pointer to variable receiving RF mode DRC gain |
| * in dB |
| * |
| * \return |
| * - 0, on success, |
| * - unequal 0, on failure |
| */ |
| INT FDK_DRC_Generator_Calc(HDRC_COMP drcComp, const INT_PCM *const inSamples, |
| const UINT inSamplesBufSize, const INT dialnorm, |
| const INT drc_TargetRefLevel, |
| const INT comp_TargetRefLevel, const FIXP_DBL clev, |
| const FIXP_DBL slev, const FIXP_DBL ext_leva, |
| const FIXP_DBL ext_levb, const FIXP_DBL lfe_lev, |
| const INT dmxGain5, const INT dmxGain2, |
| INT *const dynrng, INT *const compr); |
| |
| /** |
| * \brief Configure DRC Compressor Profile. |
| * |
| * \param drcComp Compressor handle. |
| * \param profileLine DRC profile for line mode. |
| * \param profileRF DRC profile for RF mode. |
| * |
| * \return |
| * - 0, on success, |
| * - unequal 0, on failure |
| */ |
| INT FDK_DRC_Generator_setDrcProfile(HDRC_COMP drcComp, |
| const DRC_PROFILE profileLine, |
| const DRC_PROFILE profileRF); |
| |
| /** |
| * \brief Get DRC profile for line mode. |
| * |
| * \param drcComp Compressor handle. |
| * |
| * \return Current Profile. |
| */ |
| DRC_PROFILE FDK_DRC_Generator_getDrcProfile(const HDRC_COMP drcComp); |
| |
| /** |
| * \brief Get DRC profile for RF mode. |
| * |
| * \param drcComp Compressor handle. |
| * |
| * \return Current Profile. |
| */ |
| DRC_PROFILE FDK_DRC_Generator_getCompProfile(const HDRC_COMP drcComp); |
| |
| #endif /* METADATA_COMPRESSOR_H */ |
