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Diffstat (limited to 'libSBRdec/src/hbe.h')
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diff --git a/libSBRdec/src/hbe.h b/libSBRdec/src/hbe.h new file mode 100644 index 0000000..fdffe1e --- /dev/null +++ b/libSBRdec/src/hbe.h @@ -0,0 +1,200 @@ +/* ----------------------------------------------------------------------------- +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 decoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ + +#ifndef HBE_H +#define HBE_H + +#include "sbrdecoder.h" + +#ifndef QMF_SYNTH_CHANNELS +#define QMF_SYNTH_CHANNELS (64) +#endif + +#define HBE_QMF_FILTER_STATE_ANA_SIZE (400) +#define HBE_QMF_FILTER_STATE_SYN_SIZE (200) + +#ifndef MAX_NUM_PATCHES_HBE +#define MAX_NUM_PATCHES_HBE (6) +#endif +#define MAX_STRETCH_HBE (4) + +typedef enum { + KEEP_STATES_SYNCED_OFF = 0, /*!< normal QMF transposer behaviour */ + KEEP_STATES_SYNCED_NORMAL = 1, /*!< QMF transposer called for syncing of + states the last 8/14 slots are calculated in + case next frame is HBE */ + KEEP_STATES_SYNCED_OUTDIFF = + 2, /*!< QMF transposer behaviour as in normal case, but the calculated + slots are directly written to overlap area of buffer; only used in + resetSbrDec function */ + KEEP_STATES_SYNCED_NOOUT = + 3 /*!< QMF transposer is called for syncing of states only, not output + is generated at all; only used in resetSbrDec function */ +} KEEP_STATES_SYNCED_MODE; + +struct hbeTransposer { + int xOverQmf[MAX_NUM_PATCHES_HBE]; + + int maxStretch; + int timeDomainWinLen; + int qmfInBufSize; + int qmfOutBufSize; + int noCols; + int noChannels; + int startBand; + int stopBand; + int bSbr41; + + INT_PCM *inBuf_F; + FIXP_DBL **qmfInBufReal_F; + FIXP_DBL **qmfInBufImag_F; + + FIXP_DBL *qmfBufferCodecTempSlot_F; + + QMF_FILTER_BANK HBEAnalysiscQMF; + QMF_FILTER_BANK HBESynthesisQMF; + + FIXP_DBL const *synthesisQmfPreModCos_F; + FIXP_DBL const *synthesisQmfPreModSin_F; + + FIXP_QAS anaQmfStates[HBE_QMF_FILTER_STATE_ANA_SIZE]; + FIXP_QSS synQmfStates[HBE_QMF_FILTER_STATE_SYN_SIZE]; + + FIXP_DBL **qmfHBEBufReal_F; + FIXP_DBL **qmfHBEBufImag_F; + + int bXProducts[MAX_STRETCH_HBE]; + + int kstart; + int synthSize; + + int highband_exp[2]; + int target_exp[2]; +}; + +typedef struct hbeTransposer *HANDLE_HBE_TRANSPOSER; + +SBR_ERROR QmfTransposerCreate(HANDLE_HBE_TRANSPOSER *hQmfTransposer, + const int frameSize, int bDisableCrossProducts, + int bSbr41); + +SBR_ERROR QmfTransposerReInit(HANDLE_HBE_TRANSPOSER hQmfTransposer, + UCHAR *FreqBandTable[2], UCHAR NSfb[2]); + +void QmfTransposerClose(HANDLE_HBE_TRANSPOSER hQmfTransposer); + +void QmfTransposerApply(HANDLE_HBE_TRANSPOSER hQmfTransposer, + FIXP_DBL **qmfBufferCodecReal, + FIXP_DBL **qmfBufferCodecImag, int nColsIn, + FIXP_DBL **ppQmfBufferOutReal_F, + FIXP_DBL **ppQmfBufferOutImag_F, + FIXP_DBL lpcFilterStatesReal[2 + (3 * (4))][(64)], + FIXP_DBL lpcFilterStatesImag[2 + (3 * (4))][(64)], + int pitchInBins, int scale_lb, int scale_hbe, + int *scale_hb, int timeStep, int firstSlotOffsset, + int ov_len, + KEEP_STATES_SYNCED_MODE keepStatesSyncedMode); + +int *GetxOverBandQmfTransposer(HANDLE_HBE_TRANSPOSER hQmfTransposer); + +int Get41SbrQmfTransposer(HANDLE_HBE_TRANSPOSER hQmfTransposer); +#endif /* HBE_H */ |