| /* ----------------------------------------------------------------------------- |
| 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 |
| ----------------------------------------------------------------------------- */ |
| |
| /**************************** SBR encoder library ****************************** |
| |
| Author(s): |
| |
| Description: |
| |
| *******************************************************************************/ |
| |
| /*! |
| \file |
| \brief Envelope estimation structs and prototypes $Revision: 92790 $ |
| */ |
| #ifndef ENV_EST_H |
| #define ENV_EST_H |
| |
| #include "sbr_def.h" |
| #include "sbr_encoder.h" /* SBR econfig structs */ |
| #include "ps_main.h" |
| #include "bit_sbr.h" |
| #include "fram_gen.h" |
| #include "tran_det.h" |
| #include "code_env.h" |
| #include "ton_corr.h" |
| |
| typedef struct { |
| FIXP_DBL *rBuffer[32]; |
| FIXP_DBL *iBuffer[32]; |
| |
| FIXP_DBL *p_YBuffer; |
| |
| FIXP_DBL *YBuffer[32]; |
| int YBufferScale[2]; |
| |
| UCHAR envelopeCompensation[MAX_FREQ_COEFFS]; |
| UCHAR pre_transient_info[2]; |
| |
| int YBufferWriteOffset; |
| int YBufferSzShift; |
| int rBufferReadOffset; |
| |
| int no_cols; |
| int no_rows; |
| int start_index; |
| |
| int time_slots; |
| int time_step; |
| } SBR_EXTRACT_ENVELOPE; |
| typedef SBR_EXTRACT_ENVELOPE *HANDLE_SBR_EXTRACT_ENVELOPE; |
| |
| struct ENV_CHANNEL { |
| FAST_TRAN_DETECTOR sbrFastTransientDetector; |
| SBR_TRANSIENT_DETECTOR sbrTransientDetector; |
| SBR_CODE_ENVELOPE sbrCodeEnvelope; |
| SBR_CODE_ENVELOPE sbrCodeNoiseFloor; |
| SBR_EXTRACT_ENVELOPE sbrExtractEnvelope; |
| |
| SBR_ENVELOPE_FRAME SbrEnvFrame; |
| SBR_TON_CORR_EST TonCorr; |
| |
| struct SBR_ENV_DATA encEnvData; |
| |
| int qmfScale; |
| UCHAR fLevelProtect; |
| }; |
| typedef struct ENV_CHANNEL *HANDLE_ENV_CHANNEL; |
| |
| /************ Function Declarations ***************/ |
| |
| INT FDKsbrEnc_CreateExtractSbrEnvelope(HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut, |
| INT channel, INT chInEl, |
| UCHAR *dynamic_RAM); |
| |
| INT FDKsbrEnc_InitExtractSbrEnvelope(HANDLE_SBR_EXTRACT_ENVELOPE hSbr, |
| int no_cols, int no_rows, int start_index, |
| int time_slots, int time_step, |
| int tran_off, ULONG statesInitFlag, |
| int chInEl, UCHAR *dynamic_RAM, |
| UINT sbrSyntaxFlags); |
| |
| void FDKsbrEnc_deleteExtractSbrEnvelope(HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut); |
| |
| typedef struct { |
| FREQ_RES res[MAX_NUM_NOISE_VALUES]; |
| int maxQuantError; |
| |
| } SBR_FRAME_TEMP_DATA; |
| |
| typedef struct { |
| const SBR_FRAME_INFO *frame_info; |
| FIXP_DBL noiseFloor[MAX_NUM_NOISE_VALUES]; |
| SCHAR sfb_nrg_coupling |
| [MAX_NUM_ENVELOPE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */ |
| SCHAR sfb_nrg[MAX_NUM_ENVELOPE_VALUES]; |
| SCHAR noise_level_coupling |
| [MAX_NUM_NOISE_VALUES]; /* only used if stereomode = SWITCH_L_R_C */ |
| SCHAR noise_level[MAX_NUM_NOISE_VALUES]; |
| UCHAR transient_info[3]; |
| UCHAR nEnvelopes; |
| } SBR_ENV_TEMP_DATA; |
| |
| /* |
| * Extract features from QMF data. Afterwards, the QMF data is not required |
| * anymore. |
| */ |
| void FDKsbrEnc_extractSbrEnvelope1(HANDLE_SBR_CONFIG_DATA h_con, |
| HANDLE_SBR_HEADER_DATA sbrHeaderData, |
| HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, |
| HANDLE_ENV_CHANNEL h_envChan, |
| HANDLE_COMMON_DATA cmonData, |
| SBR_ENV_TEMP_DATA *eData, |
| SBR_FRAME_TEMP_DATA *fData); |
| |
| /* |
| * Process the previously features extracted by FDKsbrEnc_extractSbrEnvelope1 |
| * and create/encode SBR envelopes. |
| */ |
| void FDKsbrEnc_extractSbrEnvelope2(HANDLE_SBR_CONFIG_DATA h_con, |
| HANDLE_SBR_HEADER_DATA sbrHeaderData, |
| HANDLE_PARAMETRIC_STEREO hParametricStereo, |
| HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, |
| HANDLE_ENV_CHANNEL sbrEnvChannel0, |
| HANDLE_ENV_CHANNEL sbrEnvChannel1, |
| HANDLE_COMMON_DATA cmonData, |
| SBR_ENV_TEMP_DATA *eData, |
| SBR_FRAME_TEMP_DATA *fData, int clearOutput); |
| |
| INT FDKsbrEnc_GetEnvEstDelay(HANDLE_SBR_EXTRACT_ENVELOPE hSbr); |
| |
| #endif |