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Diffstat (limited to 'libSBRdec/src/psdec_hybrid.h')
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diff --git a/libSBRdec/src/psdec_hybrid.h b/libSBRdec/src/psdec_hybrid.h new file mode 100644 index 0000000..6503df9 --- /dev/null +++ b/libSBRdec/src/psdec_hybrid.h @@ -0,0 +1,165 @@ + +/* ----------------------------------------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2012 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 +----------------------------------------------------------------------------------------------------------- */ + +#ifndef __HYBRID_H +#define __HYBRID_H + +#include "sbrdecoder.h" + + +#define HYBRID_FILTER_LENGTH 13 +#define HYBRID_FILTER_DELAY 6 + + +#define FAST_FILTER2 +#define FAST_FILTER4 +#define FAST_FILTER8 +#define FAST_FILTER12 + +#define FFT_IDX_R(a) (2*a) +#define FFT_IDX_I(a) (2*a+1) + +#define FIXP_FFT_IDX_R(a) (a<<1) +#define FIXP_FFT_IDX_I(a) ((a<<1) + 1) + + +typedef enum { + + HYBRID_2_REAL = 2, + HYBRID_4_CPLX = 4, + HYBRID_8_CPLX = 8, + HYBRID_12_CPLX = 12 + +} HYBRID_RES; + +typedef struct +{ + SCHAR nQmfBands; + SCHAR frameSize; + SCHAR qmfBufferMove; + + UCHAR pResolution[3]; + + FIXP_DBL mQmfBufferRealSlot[3][HYBRID_FILTER_LENGTH]; /**< Stores old Qmf samples. */ + FIXP_DBL mQmfBufferImagSlot[3][HYBRID_FILTER_LENGTH]; + SCHAR sf_mQmfBuffer; + +} HYBRID; + +typedef HYBRID *HANDLE_HYBRID; + +void +fillHybridDelayLine( FIXP_DBL **fixpQmfReal, + FIXP_DBL **fixpQmfImag, + FIXP_DBL fixpHybridLeftR[12], + FIXP_DBL fixpHybridLeftI[12], + FIXP_DBL fixpHybridRightR[12], + FIXP_DBL fixpHybridRightI[12], + HANDLE_HYBRID hHybrid ); + +void +slotBasedHybridAnalysis ( FIXP_DBL *fixpQmfReal, + FIXP_DBL *fixpQmfImag, + + FIXP_DBL *fixpHybridReal, + FIXP_DBL *fixpHybridImag, + + HANDLE_HYBRID hHybrid); + + +void +slotBasedHybridSynthesis ( FIXP_DBL *fixpHybridReal, + FIXP_DBL *fixpHybridImag, + + FIXP_DBL *fixpQmfReal, + FIXP_DBL *fixpQmfImag, + + HANDLE_HYBRID hHybrid ); + +SBR_ERROR InitHybridFilterBank ( HANDLE_HYBRID hHybrid, + SCHAR frameSize, + SCHAR noBands, + const UCHAR *pResolution ); + + +#endif /* __HYBRID_H */ |