| |
| /* ----------------------------------------------------------------------------------------------------------- |
| 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 Audio Encoder ************************** |
| |
| Initial author: M.Werner |
| contents/description: Psychoaccoustic data |
| |
| ******************************************************************************/ |
| |
| #ifndef _PSY_DATA_H |
| #define _PSY_DATA_H |
| |
| |
| #include "block_switch.h" |
| |
| /* Be careful with MAX_SFB_LONG as length of the .Long arrays. |
| * sfbEnergy.Long and sfbEnergyMS.Long and sfbThreshold.Long are used as a temporary storage for the regrouped |
| * short energies and thresholds between FDKaacEnc_groupShortData() and BuildInterface() in FDKaacEnc_psyMain(). |
| * The space required for this is MAX_GROUPED_SFB ( = MAX_NO_OF_GROUPS*MAX_SFB_SHORT ). |
| * However, this is not important if unions are used (which is not possible with pfloat). */ |
| |
| typedef shouldBeUnion{ |
| FIXP_DBL Long[MAX_GROUPED_SFB]; |
| FIXP_DBL Short[TRANS_FAC][MAX_SFB_SHORT]; |
| }SFB_THRESHOLD; |
| |
| typedef shouldBeUnion{ |
| FIXP_DBL Long[MAX_GROUPED_SFB]; |
| FIXP_DBL Short[TRANS_FAC][MAX_SFB_SHORT]; |
| }SFB_ENERGY; |
| |
| typedef shouldBeUnion{ |
| FIXP_DBL Long[MAX_GROUPED_SFB]; |
| FIXP_DBL Short[TRANS_FAC][MAX_SFB_SHORT]; |
| }SFB_LD_ENERGY; |
| |
| typedef shouldBeUnion{ |
| INT Long[MAX_GROUPED_SFB]; |
| INT Short[TRANS_FAC][MAX_SFB_SHORT]; |
| }SFB_MAX_SCALE; |
| |
| |
| typedef struct{ |
| INT_PCM* psyInputBuffer; |
| FIXP_DBL overlapAddBuffer[1024]; |
| |
| BLOCK_SWITCHING_CONTROL blockSwitchingControl; /* block switching */ |
| FIXP_DBL sfbThresholdnm1[MAX_SFB]; /* FDKaacEnc_PreEchoControl */ |
| INT mdctScalenm1; /* scale of last block's mdct (FDKaacEnc_PreEchoControl) */ |
| INT calcPreEcho; |
| INT isLFE; |
| }PSY_STATIC; |
| |
| |
| typedef struct{ |
| FIXP_DBL *mdctSpectrum; |
| SFB_THRESHOLD sfbThreshold; /* adapt */ |
| SFB_ENERGY sfbEnergy; /* sfb energies */ |
| SFB_LD_ENERGY sfbEnergyLdData; /* sfb energies in ldData format */ |
| SFB_MAX_SCALE sfbMaxScaleSpec; |
| SFB_ENERGY sfbEnergyMS; /* mid/side sfb energies */ |
| FIXP_DBL sfbEnergyMSLdData[MAX_GROUPED_SFB]; /* mid/side sfb energies in ldData format */ |
| SFB_ENERGY sfbSpreadEnergy; |
| INT mdctScale; /* exponent of data in mdctSpectrum */ |
| INT groupedSfbOffset[MAX_GROUPED_SFB+1]; |
| INT sfbActive; |
| INT lowpassLine; |
| }PSY_DATA; |
| |
| |
| #endif /* _PSY_DATA_H */ |
