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diff --git a/libFDK/include/mdct.h b/libFDK/include/mdct.h deleted file mode 100644 index e1c2d74..0000000 --- a/libFDK/include/mdct.h +++ /dev/null @@ -1,243 +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 ------------------------------------------------------------------------------------------------------------ */ - -/*************************** Fraunhofer IIS FDK Tools ********************** - - Author(s): Manuel Jander, Josef Hoepfl - Description: MDCT routines - -******************************************************************************/ - -#ifndef __MDCT_H__ -#define __MDCT_H__ - - - -#include "common_fix.h" - -#define MDCT_OUT_HEADROOM 2 /* Output additional headroom */ -#define MDCT_OUTPUT_SCALE (DFRACT_BITS-SAMPLE_BITS-MDCT_OUT_HEADROOM) -/* Refer to "Output word length" in ISO/IEC 14496-3:2008(E) 23.2.3.6 */ -#define MDCT_OUTPUT_GAIN 16 - -#if (SAMPLE_BITS == DFRACT_BITS) -#define IMDCT_SCALE(x) (INT_PCM)SATURATE_LEFT_SHIFT(x, -MDCT_OUTPUT_SCALE, SAMPLE_BITS) -#else -#define IMDCT_SCALE(x) (INT_PCM)SATURATE_RIGHT_SHIFT(x, MDCT_OUTPUT_SCALE, SAMPLE_BITS) -#endif -#define IMDCT_SCALE_DBL(x) (FIXP_DBL)(x) - -/** - * \brief MDCT persistent data - */ -typedef struct { - union { - FIXP_DBL *freq; - FIXP_DBL *time; - } overlap; /**< Pointer to overlap memory */ - - const FIXP_WTP *prev_wrs; /**< pointer to previous right window slope */ - int prev_tl; /**< previous tranform length */ - int prev_nr; /**< previous right window offset */ - int prev_fr; /**< previous right window slope length */ - int ov_offset; /**< overlap time data fill level */ - int ov_size; /**< Overlap buffer size in words */ - -} mdct_t; - -typedef mdct_t* H_MDCT; - -/** - * \brief Initialize as valid MDCT handle - * - * \param hMdct handle of an allocated MDCT handle. - * \param overlap pointer to FIXP_DBL overlap buffer. - * \param overlapBufferSize size in FIXP_DBLs of the given overlap buffer. - * \return void - */ -void mdct_init( H_MDCT hMdct, - FIXP_DBL *overlap, - INT overlapBufferSize ); - -/** - * \brief perform MDCT transform (time domain to frequency domain) with given parameters. - * - * \param hMdct handle of an allocated MDCT handle. - * \param spectrum pointer to where the resulting MDCT spectrum will be stored into. - * \param scalefactor pointer to the input scale shift value. Updated accordingly on return. - * \param input pointer to input time domain signal - * \param tl transformation length. - * \param nr right window slope offset (amount of window coefficients assumed to be 1.0) - * \param fr right overlap window slope length - * \param wrs pointer to the right side overlap window coefficients. - * \return number of input samples processed. - */ -INT mdct_block( - H_MDCT hMdct, - FIXP_DBL *spectrum, - INT *scalefactor, - INT_PCM *input, - INT tl, - INT nr, - INT fr, - const FIXP_WTB *wrs ); - - -/** - * \brief add/multiply 2/N transform gain and MPEG4 part 3 defined output gain (see definition - * of MDCT_OUTPUT_GAIN) to given mantissa factor and exponent. - * \param pGain pointer to the mantissa of a gain factor to be applied to IMDCT data. - * \param pExponent pointer to the exponent of a gain factor to be applied to IMDCT data. - * \param tl length of the IMDCT where the gain *pGain * (2 ^ *pExponent) will be applied to. - */ -void imdct_gain( - FIXP_DBL *pGain, - int *pExponent, - int tl - ); - -/** - * \brief drain buffered output samples into given buffer. Changes the MDCT state. - */ -INT imdct_drain( - H_MDCT hMdct, - FIXP_DBL * pTimeData, - INT nrSamplesRoom - ); - - -/** - * \brief Copy overlap time domain data to given buffer. Does not change the MDCT state. - * \return number of actually copied samples (ov + nr). - */ -INT imdct_copy_ov_and_nr( - H_MDCT hMdct, - FIXP_DBL * pTimeData, - INT nrSamples - ); - -/** - * \brief Adapt MDCT parameters for non-matching window slopes. - * \param hMdct handle of an allocated MDCT handle. - * \param pfl pointer to left overlap window side length. - * \param pnl pointer to length of the left n part of the window. - * \param tl transform length. - * \param wls pointer to the left side overlap window coefficients. - * \param noOutSamples desired number of output samples. - */ -void imdct_adapt_parameters(H_MDCT hMdct, int *pfl, int *pnl, int tl, const FIXP_WTP *wls, int noOutSamples); - -/** - * \brief perform several inverse MDCT transforms (frequency domain to time domain) with given parameters. - * - * \param hMdct handle of an allocated MDCT handle. - * \param output pointer to where the output time domain signal will be stored into. - * \param stride the stride factor for accessing time domain samples in output. - * \param spectrum pointer to the input MDCT spectra. - * \param scalefactors scale shift values of the input spectrum. - * \param nSpec number of MDCT spectrums. - * \param noOutSamples desired number of output samples. - * \param tl transform length. - * \param wls pointer to the left side overlap window coefficients. - * \param fl left overlap window side length. - * \param wrs pointer to the right side overlap window coefficients of all individual IMDCTs. - * \param fr right overlap window side length of all individual IMDCTs. - * \param gain factor to apply to output samples (if != 0). - * \return number of output samples returned. - */ -INT imdct_block( - H_MDCT hMdct, - FIXP_DBL *output, - FIXP_DBL *spectrum, - const SHORT scalefactor[], - const INT nSpec, - const INT noOutSamples, - const INT tl, - const FIXP_WTP *wls, - INT fl, - const FIXP_WTP *wrs, - const INT fr, - FIXP_DBL gain ); - - -#endif /* __MDCT_H__ */ |