| |
| /* ----------------------------------------------------------------------------------------------------------- |
| 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. Neuendorf, N. Rettelbach, M. Multrus |
| contents/description: PS Parameter extraction, encoding |
| |
| ******************************************************************************/ |
| /*! |
| \file |
| \brief PS parameter extraction, encoding functions |
| */ |
| |
| #ifndef __INCLUDED_PS_ENCODE_H |
| #define __INCLUDED_PS_ENCODE_H |
| |
| #include "ps_const.h" |
| #include "ps_bitenc.h" |
| |
| |
| #define IID_SCALE_FT (64.f) /* maxVal in Quant tab is +/- 50 */ |
| #define IID_SCALE 6 /* maxVal in Quant tab is +/- 50 */ |
| #define IID_MAXVAL (1<<IID_SCALE) |
| |
| #define PS_QUANT_SCALE_FT (64.f) /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 64 */ |
| #define PS_QUANT_SCALE 6 /* error smaller (64-25)/64 * 20 bands * 4 env -> QuantScale 6 bit */ |
| |
| |
| #define QMF_GROUPS_LO_RES 12 |
| #define SUBQMF_GROUPS_LO_RES 10 |
| #define QMF_GROUPS_HI_RES 18 |
| #define SUBQMF_GROUPS_HI_RES 30 |
| |
| |
| typedef struct T_PS_DATA { |
| |
| INT iidEnable; |
| INT iidEnableLast; |
| INT iidQuantMode; |
| INT iidQuantModeLast; |
| INT iidDiffMode[PS_MAX_ENVELOPES]; |
| INT iidIdx [PS_MAX_ENVELOPES][PS_MAX_BANDS]; |
| INT iidIdxLast [PS_MAX_BANDS]; |
| |
| INT iccEnable; |
| INT iccEnableLast; |
| INT iccQuantMode; |
| INT iccQuantModeLast; |
| INT iccDiffMode[PS_MAX_ENVELOPES]; |
| INT iccIdx [PS_MAX_ENVELOPES][PS_MAX_BANDS]; |
| INT iccIdxLast [PS_MAX_BANDS]; |
| |
| INT nEnvelopesLast; |
| |
| INT headerCnt; |
| INT iidTimeCnt; |
| INT iccTimeCnt; |
| INT noEnvCnt; |
| |
| } PS_DATA, *HANDLE_PS_DATA; |
| |
| |
| typedef struct T_PS_ENCODE{ |
| |
| PS_DATA psData; |
| |
| PS_BANDS psEncMode; |
| INT nQmfIidGroups; |
| INT nSubQmfIidGroups; |
| INT iidGroupBorders[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES + 1]; |
| INT subband2parameterIndex[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES]; |
| UCHAR iidGroupWidthLd[QMF_GROUPS_HI_RES + SUBQMF_GROUPS_HI_RES]; |
| FIXP_DBL iidQuantErrorThreshold; |
| |
| UCHAR psBandNrgScale [PS_MAX_BANDS]; |
| |
| } PS_ENCODE; |
| |
| |
| typedef struct T_PS_ENCODE *HANDLE_PS_ENCODE; |
| |
| FDK_PSENC_ERROR FDKsbrEnc_CreatePSEncode( |
| HANDLE_PS_ENCODE *phPsEncode |
| ); |
| |
| FDK_PSENC_ERROR FDKsbrEnc_InitPSEncode( |
| HANDLE_PS_ENCODE hPsEncode, |
| const PS_BANDS psEncMode, |
| const FIXP_DBL iidQuantErrorThreshold |
| ); |
| |
| FDK_PSENC_ERROR FDKsbrEnc_DestroyPSEncode( |
| HANDLE_PS_ENCODE *phPsEncode |
| ); |
| |
| FDK_PSENC_ERROR FDKsbrEnc_PSEncode( |
| HANDLE_PS_ENCODE hPsEncode, |
| HANDLE_PS_OUT hPsOut, |
| UCHAR *dynBandScale, |
| UINT maxEnvelopes, |
| FIXP_DBL *hybridData[HYBRID_FRAMESIZE][MAX_PS_CHANNELS][2], |
| const INT frameSize, |
| const INT sendHeader |
| ); |
| |
| #endif |
