| /* ----------------------------------------------------------------------------- |
| 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. Werner |
| |
| Description: MDCT Transform |
| |
| *******************************************************************************/ |
| |
| #ifndef TRANSFORM_H |
| #define TRANSFORM_H |
| |
| #include "mdct.h" |
| #include "common_fix.h" |
| |
| #define WTS0 1 |
| #define WTS1 0 |
| #define WTS2 -2 |
| |
| /** |
| * \brief: Performe MDCT transform of time domain data. |
| * \param timeData pointer to time domain input signal. |
| * \param mdctData pointer to store frequency domain output data. |
| * \param blockType index indicating the type of block. Either |
| * LONG_WINDOW, START_WINDOW, SHORT_WINDOW or STOP_WINDOW. |
| * \param windowShape index indicating the window slope type to be used. |
| * Values allowed are either SINE_WINDOW or KBD_WINDOW. |
| * \param previndowShape index indicating the window slope type used |
| * in the last frame. |
| * Values allowed are either SINE_WINDOW or KBD_WINDOW. |
| * \param frameLength length of the block. Either 1024 or 960. |
| * \param mdctData_e pointer to an INT where the exponent of the frequency |
| * domain output data is stored into. |
| * \param filterType xxx |
| * \return 0 in case of success, non-zero in case of error (inconsistent |
| * parameters). |
| */ |
| INT FDKaacEnc_Transform_Real(const INT_PCM* pTimeData, |
| FIXP_DBL* RESTRICT mdctData, const INT blockType, |
| const INT windowShape, INT* prevWindowShape, |
| H_MDCT mdctPers, const INT frameLength, |
| INT* pMdctData_e, INT filterType); |
| |
| /** |
| * \brief: Performe ELD filterbnank transform of time domain data. |
| * \param timeData pointer to time domain input signal. |
| * \param mdctData pointer to store frequency domain output data. |
| * \param blockType index indicating the type of block. Either |
| * LONG_WINDOW, START_WINDOW, SHORT_WINDOW or STOP_WINDOW. |
| * \param windowShape index indicating the window slope type to be used. |
| * Values allowed are either SINE_WINDOW or KBD_WINDOW. |
| * \param previndowShape index indicating the window slope type used |
| * in the last frame. |
| * Values allowed are either SINE_WINDOW or KBD_WINDOW. |
| * \param frameLength length of the block. Either 1024 or 960. |
| * \param mdctData_e pointer to an INT where the exponent of the frequency |
| * domain output data is stored into. |
| * \param filterType xxx |
| * \param overlapAddBuffer overlap add buffer for overlap of ELD filterbank |
| * \return 0 in case of success, non-zero in case of error (inconsistent |
| * parameters). |
| */ |
| INT FDKaacEnc_Transform_Real_Eld(const INT_PCM* pTimeData, |
| FIXP_DBL* RESTRICT mdctData, |
| const INT blockType, const INT windowShape, |
| INT* prevWindowShape, const INT frameLength, |
| INT* mdctData_e, INT filterType, |
| FIXP_DBL* RESTRICT overlapAddBuffer); |
| |
| #endif /* #!defined (TRANSFORM_H) */ |