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Diffstat (limited to 'libSBRenc/src/resampler.h')
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diff --git a/libSBRenc/src/resampler.h b/libSBRenc/src/resampler.h deleted file mode 100644 index 0192970..0000000 --- a/libSBRenc/src/resampler.h +++ /dev/null @@ -1,151 +0,0 @@ - -/* ----------------------------------------------------------------------------------------------------------- -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 ------------------------------------------------------------------------------------------------------------ */ - -#ifndef __RESAMPLER_H -#define __RESAMPLER_H -/*! - \file - \brief Fixed Point Resampler Tool Box -*/ - -#include "common_fix.h" - - -/**************************************************************************/ -/* BIQUAD Filter Structure */ -/**************************************************************************/ - -#define MAXNR_SECTIONS (15) - -#ifdef RS_BIQUAD_STATES16 -typedef FIXP_SGL FIXP_BQS; -#else -typedef FIXP_DBL FIXP_BQS; -#endif - -typedef struct -{ - FIXP_BQS states[MAXNR_SECTIONS+1][2]; /*! state buffer */ - const FIXP_SGL *coeffa; /*! pointer to filter coeffs */ - FIXP_DBL gain; /*! overall gain factor */ - int Wc; /*! normalized cutoff freq * 1000 */ - int noCoeffs; /*! number of filter coeffs sets */ - int ptr; /*! index to rinbuffers */ -} LP_FILTER; - - -/**************************************************************************/ -/* Downsampler Structure */ -/**************************************************************************/ - -typedef struct -{ - LP_FILTER downFilter; /*! filter instance */ - int ratio; /*! downsampling ration */ - int delay; /*! downsampling delay (source fs) */ - int pending; /*! number of pending output samples */ -} DOWNSAMPLER; - - -/** - * \brief Initialized a given downsampler structure. - */ -INT FDKaacEnc_InitDownsampler(DOWNSAMPLER *DownSampler, /*!< pointer to downsampler instance */ - INT Wc, /*!< normalized cutoff freq * 1000 */ - INT ratio); /*!< downsampler ratio */ - -/** - * \brief Downsample a set of audio samples. numInSamples must be at least equal to the - * downsampler ratio. - */ -INT FDKaacEnc_Downsample(DOWNSAMPLER *DownSampler, /*!< pointer to downsampler instance */ - INT_PCM *inSamples, /*!< pointer to input samples */ - INT numInSamples, /*!< number of input samples */ - INT inStride, /*!< increment of input samples */ - INT_PCM *outSamples, /*!< pointer to output samples */ - INT *numOutSamples, /*!< pointer tp number of output samples */ - INT outstride); /*!< increment of output samples */ - - - -#endif /* __RESAMPLER_H */ |