diff options
Diffstat (limited to 'libFDK/include/FDK_trigFcts.h')
| -rw-r--r-- | libFDK/include/FDK_trigFcts.h | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/libFDK/include/FDK_trigFcts.h b/libFDK/include/FDK_trigFcts.h deleted file mode 100644 index c32c0f2..0000000 --- a/libFDK/include/FDK_trigFcts.h +++ /dev/null @@ -1,229 +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): Haricharan Lakshman, Manuel Jander - Description: Trigonometric functions fixed point fractional implementation. - -******************************************************************************/ - - - -#include "common_fix.h" - -#include "FDK_tools_rom.h" - -/* Fixed point precision definitions */ -#define Q(format) ((FIXP_DBL)(((LONG)1) << (format))) - -#ifndef M_PI -#define M_PI (3.14159265358979323846f) -#endif - -/*! - * Inverse tangent function. - */ - -// --- fixp_atan() ---- -#define Q_ATANINP (25) // Input in q25, Output in q30 -#define Q_ATANOUT (30) -#define ATI_SF ((DFRACT_BITS-1)-Q_ATANINP) // 6 -#define ATI_SCALE ((float)(1<<ATI_SF)) // -#define ATO_SF ((DFRACT_BITS-1)-Q_ATANOUT) // 1 ] -pi/2 .. pi/2 [ -#define ATO_SCALE ((float)(1<<ATO_SF)) // -// --- fixp_atan2() --- -#define Q_ATAN2OUT (29) -#define AT2O_SF ((DFRACT_BITS-1)-Q_ATAN2OUT) // 2 ] -pi .. pi ] -#define AT2O_SCALE ((float)(1<<AT2O_SF)) // -// -------------------- - -FIXP_DBL fixp_atan(FIXP_DBL x); -FIXP_DBL fixp_atan2(FIXP_DBL y, FIXP_DBL x); - -FIXP_DBL fixp_cos(FIXP_DBL x, int scale); -FIXP_DBL fixp_sin(FIXP_DBL x, int scale); - -#define FIXP_COS_SIN - - -#include "FDK_tools_rom.h" - -#define SINETAB SineTable512 -#define LD 9 - - -#ifndef FUNCTION_inline_fixp_cos_sin - -#define FUNCTION_inline_fixp_cos_sin - -/* - * Calculates coarse lookup index and sign for sine. - * Returns delta x residual. - */ -static inline FIXP_DBL fixp_sin_cos_residual_inline(FIXP_DBL x, int scale, FIXP_DBL *sine, FIXP_DBL *cosine) -{ - FIXP_DBL residual; - int s; - int shift = (31-scale-LD-1); - int ssign = 1; - int csign = 1; - - residual = fMult(x, FL2FXCONST_DBL(1.0/M_PI)); - s = ((LONG)residual) >> shift; - - residual &= ( (1<<shift) - 1 ); - residual = fMult(residual, FL2FXCONST_DBL(M_PI/4.0)) << 2; - residual <<= scale; - - /* Sine sign symmetry */ - if (s & ((1<<LD)<<1) ) { - ssign = -ssign; - } - /* Cosine sign symmetry */ - if ( (s + (1<<LD)) & ((1<<LD)<<1) ) { - csign = -csign; - } - - s = fAbs(s); - - s &= (((1<<LD)<<1)-1); /* Modulo PI */ - - if (s > (1<<LD)) { - s = ((1<<LD)<<1) - s; - } - - { - LONG sl, cl; - /* Because of packed table */ - if (s > (1<<(LD-1))) { - FIXP_STP tmp; - /* Cosine/Sine simetry for angles greater than PI/4 */ - s = (1<<LD)-s; - tmp = SINETAB[s]; - sl = (LONG)tmp.v.re; - cl = (LONG)tmp.v.im; - } else { - FIXP_STP tmp; - tmp = SINETAB[s]; - sl = (LONG)tmp.v.im; - cl = (LONG)tmp.v.re; - } - -#ifdef SINETABLE_16BIT - *sine = (FIXP_DBL)((sl * ssign) << (DFRACT_BITS-FRACT_BITS)); - *cosine = (FIXP_DBL)((cl * csign) << (DFRACT_BITS-FRACT_BITS)); -#else - *sine = (FIXP_DBL)(sl * ssign); - *cosine = (FIXP_DBL)(cl * csign); -#endif - } - - return residual; -} - -/** - * \brief Calculate cosine and sine value each of 2 angles different angle values. - * \param x1 first angle value - * \param x2 second angle value - * \param scale exponent of x1 and x2 - * \param out pointer to 4 FIXP_DBL locations, were the values cos(x1), sin(x1), cos(x2), sin(x2) - * will be stored into. - */ -static inline void inline_fixp_cos_sin (FIXP_DBL x1, FIXP_DBL x2, const int scale, FIXP_DBL *out) -{ - FIXP_DBL residual, error0, error1, sine, cosine; - residual = fixp_sin_cos_residual_inline(x1, scale, &sine, &cosine); - error0 = fMultDiv2(sine, residual); - error1 = fMultDiv2(cosine, residual); - *out++ = cosine - (error0<<1); - *out++ = sine + (error1<<1); - - residual = fixp_sin_cos_residual_inline(x2, scale, &sine, &cosine); - error0 = fMultDiv2(sine, residual); - error1 = fMultDiv2(cosine, residual); - *out++ = cosine - (error0<<1); - *out++ = sine + (error1<<1); -} -#endif - |