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diff --git a/fdk-aac/libSBRenc/src/env_est.h b/fdk-aac/libSBRenc/src/env_est.h new file mode 100644 index 0000000..006f55b --- /dev/null +++ b/fdk-aac/libSBRenc/src/env_est.h @@ -0,0 +1,223 @@ +/* ----------------------------------------------------------------------------- +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 |