| |
| /* ----------------------------------------------------------------------------------------------------------- |
| Software License for The Fraunhofer FDK AAC Codec Library for Android |
| |
| © Copyright 1995 - 2013 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 |
| ----------------------------------------------------------------------------------------------------------- */ |
| |
| /*! |
| \file |
| \brief Envelope estimation structs and prototypes |
| */ |
| #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[QMF_MAX_TIME_SLOTS]; |
| FIXP_DBL *iBuffer[QMF_MAX_TIME_SLOTS]; |
| |
| FIXP_DBL *p_YBuffer; |
| |
| FIXP_DBL *YBuffer[QMF_MAX_TIME_SLOTS]; |
| 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 |
| { |
| 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 |