diff options
Diffstat (limited to 'libSBRenc/src/tran_det.h')
| -rw-r--r-- | libSBRenc/src/tran_det.h | 282 |
1 files changed, 135 insertions, 147 deletions
diff --git a/libSBRenc/src/tran_det.h b/libSBRenc/src/tran_det.h index 6fe1023..d10a7db 100644 --- a/libSBRenc/src/tran_det.h +++ b/libSBRenc/src/tran_det.h @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. - All rights reserved. +© 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. +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: +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 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 +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. +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. +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." +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. +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. +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. +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 @@ -79,125 +90,102 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ + +/**************************** SBR encoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ /*! \file - \brief Transient detector prototypes + \brief Transient detector prototypes $Revision: 95111 $ */ -#ifndef __TRAN_DET_H -#define __TRAN_DET_H +#ifndef TRAN_DET_H +#define TRAN_DET_H #include "sbr_encoder.h" #include "sbr_def.h" -typedef struct -{ - FIXP_DBL transients[QMF_MAX_TIME_SLOTS+(QMF_MAX_TIME_SLOTS/2)]; - FIXP_DBL thresholds[QMF_CHANNELS]; - FIXP_DBL tran_thr; /* Master threshold for transient signals */ - FIXP_DBL split_thr_m; /* Threshold for splitting FIXFIX-frames into 2 env */ - INT split_thr_e; /* Scale for splitting threshold */ - FIXP_DBL prevLowBandEnergy; /* Energy of low band */ - FIXP_DBL prevHighBandEnergy; /* Energy of high band */ - INT tran_fc; /* Number of lowband subbands to discard */ - INT no_cols; - INT no_rows; - INT mode; - - int frameShift; - int tran_off; /* Offset for reading energy values. */ -} -SBR_TRANSIENT_DETECTOR; - +typedef struct { + FIXP_DBL transients[32 + (32 / 2)]; + FIXP_DBL thresholds[64]; + FIXP_DBL tran_thr; /* Master threshold for transient signals */ + FIXP_DBL split_thr_m; /* Threshold for splitting FIXFIX-frames into 2 env */ + INT split_thr_e; /* Scale for splitting threshold */ + FIXP_DBL prevLowBandEnergy; /* Energy of low band */ + FIXP_DBL prevHighBandEnergy; /* Energy of high band */ + INT tran_fc; /* Number of lowband subbands to discard */ + INT no_cols; + INT no_rows; + INT mode; + + int frameShift; + int tran_off; /* Offset for reading energy values. */ +} SBR_TRANSIENT_DETECTOR; typedef SBR_TRANSIENT_DETECTOR *HANDLE_SBR_TRANSIENT_DETECTOR; #define TRAN_DET_LOOKAHEAD 2 -#define TRAN_DET_START_FREQ 4500 /*start frequency for transient detection*/ -#define TRAN_DET_STOP_FREQ 13500 /*stop frequency for transient detection*/ -#define TRAN_DET_MIN_QMFBANDS 4 /* minimum qmf bands for transient detection */ -#define QMF_HP_dBd_SLOPE_FIX FL2FXCONST_DBL(0.00075275f) /* 0.002266f/10 * log2(10) */ -#define TRAN_DET_THRSHLD FL2FXCONST_DBL(3.2f/4.f) -#define TRAN_DET_THRSHLD_SCALE (2) - -typedef struct -{ - INT transientCandidates[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; +#define TRAN_DET_START_FREQ 4500 /*start frequency for transient detection*/ +#define TRAN_DET_STOP_FREQ 13500 /*stop frequency for transient detection*/ +#define TRAN_DET_MIN_QMFBANDS \ + 4 /* minimum qmf bands for transient detection \ + */ +#define QMF_HP_dBd_SLOPE_FIX \ + FL2FXCONST_DBL(0.00075275f) /* 0.002266f/10 * log2(10) */ +#define TRAN_DET_THRSHLD FL2FXCONST_DBL(5.0f / 8.0f) +#define TRAN_DET_THRSHLD_SCALE (3) + +typedef struct { + INT transientCandidates[32 + TRAN_DET_LOOKAHEAD]; INT nTimeSlots; INT lookahead; INT startBand; INT stopBand; - FIXP_DBL dBf_m[QMF_CHANNELS]; - INT dBf_e[QMF_CHANNELS]; + FIXP_DBL dBf_m[64]; + INT dBf_e[64]; - FIXP_DBL energy_timeSlots[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; - INT energy_timeSlots_scale[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + FIXP_DBL energy_timeSlots[32 + TRAN_DET_LOOKAHEAD]; + INT energy_timeSlots_scale[32 + TRAN_DET_LOOKAHEAD]; - FIXP_DBL delta_energy[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; - INT delta_energy_scale[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; + FIXP_DBL delta_energy[32 + TRAN_DET_LOOKAHEAD]; + INT delta_energy_scale[32 + TRAN_DET_LOOKAHEAD]; - FIXP_DBL lowpass_energy[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; - INT lowpass_energy_scale[QMF_MAX_TIME_SLOTS + TRAN_DET_LOOKAHEAD]; -#if defined (FTD_LOG) - FDKFILE *ftd_log; -#endif -} -FAST_TRAN_DETECTOR; + FIXP_DBL lowpass_energy[32 + TRAN_DET_LOOKAHEAD]; + INT lowpass_energy_scale[32 + TRAN_DET_LOOKAHEAD]; +} FAST_TRAN_DETECTOR; typedef FAST_TRAN_DETECTOR *HANDLE_FAST_TRAN_DET; - INT FDKsbrEnc_InitSbrFastTransientDetector( - HANDLE_FAST_TRAN_DET h_sbrFastTransientDetector, - const INT time_slots_per_frame, - const INT bandwidth_qmf_slot, - const INT no_qmf_channels, - const INT sbr_qmf_1st_band - ); + HANDLE_FAST_TRAN_DET h_sbrFastTransientDetector, + const INT time_slots_per_frame, const INT bandwidth_qmf_slot, + const INT no_qmf_channels, const INT sbr_qmf_1st_band); void FDKsbrEnc_fastTransientDetect( - const HANDLE_FAST_TRAN_DET h_sbrFastTransientDetector, - const FIXP_DBL *const *Energies, - const int *const scaleEnergies, - const INT YBufferWriteOffset, - UCHAR *const tran_vector - ); - -void -FDKsbrEnc_transientDetect(HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, - FIXP_DBL **Energies, - INT *scaleEnergies, - UCHAR *tran_vector, - int YBufferWriteOffset, - int YBufferSzShift, - int timeStep, - int frameMiddleBorder); - -int -FDKsbrEnc_InitSbrTransientDetector (HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, - UINT sbrSyntaxFlags, /* SBR syntax flags derived from AOT. */ - INT frameSize, - INT sampleFreq, - sbrConfigurationPtr params, - int tran_fc, - int no_cols, - int no_rows, - int YBufferWriteOffset, - int YBufferSzShift, - int frameShift, - int tran_off); - -void -FDKsbrEnc_frameSplitter(FIXP_DBL **Energies, - INT *scaleEnergies, - HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, - UCHAR *freqBandTable, - UCHAR *tran_vector, - int YBufferWriteOffset, - int YBufferSzShift, - int nSfb, - int timeStep, - int no_cols, - FIXP_DBL* tonality); + const HANDLE_FAST_TRAN_DET h_sbrFastTransientDetector, + const FIXP_DBL *const *Energies, const int *const scaleEnergies, + const INT YBufferWriteOffset, UCHAR *const tran_vector); + +void FDKsbrEnc_transientDetect( + HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, FIXP_DBL **Energies, + INT *scaleEnergies, UCHAR *tran_vector, int YBufferWriteOffset, + int YBufferSzShift, int timeStep, int frameMiddleBorder); + +int FDKsbrEnc_InitSbrTransientDetector( + HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, + UINT sbrSyntaxFlags, /* SBR syntax flags derived from AOT. */ + INT frameSize, INT sampleFreq, sbrConfigurationPtr params, int tran_fc, + int no_cols, int no_rows, int YBufferWriteOffset, int YBufferSzShift, + int frameShift, int tran_off); + +void FDKsbrEnc_frameSplitter( + FIXP_DBL **Energies, INT *scaleEnergies, + HANDLE_SBR_TRANSIENT_DETECTOR h_sbrTransientDetector, UCHAR *freqBandTable, + UCHAR *tran_vector, int YBufferWriteOffset, int YBufferSzShift, int nSfb, + int timeStep, int no_cols, FIXP_DBL *tonality); #endif |