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Diffstat (limited to 'libSBRenc/src/sbr_misc.cpp')
| -rw-r--r-- | libSBRenc/src/sbr_misc.cpp | 272 |
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diff --git a/libSBRenc/src/sbr_misc.cpp b/libSBRenc/src/sbr_misc.cpp deleted file mode 100644 index c673b81..0000000 --- a/libSBRenc/src/sbr_misc.cpp +++ /dev/null @@ -1,272 +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 ------------------------------------------------------------------------------------------------------------ */ - -/*! - \file - \brief Sbr miscellaneous helper functions -*/ -#include "sbr_misc.h" - - -void FDKsbrEnc_Shellsort_fract (FIXP_DBL *in, INT n) -{ - FIXP_DBL v; - INT i, j; - INT inc = 1; - - do - inc = 3 * inc + 1; - while (inc <= n); - - do { - inc = inc / 3; - for (i = inc + 1; i <= n; i++) { - v = in[i-1]; - j = i; - while (in[j-inc-1] > v) { - in[j-1] = in[j-inc-1]; - j -= inc; - if (j <= inc) - break; - } - in[j-1] = v; - } - } while (inc > 1); - -} - -/* Sorting routine */ -void FDKsbrEnc_Shellsort_int (INT *in, INT n) -{ - - INT i, j, v; - INT inc = 1; - - do - inc = 3 * inc + 1; - while (inc <= n); - - do { - inc = inc / 3; - for (i = inc + 1; i <= n; i++) { - v = in[i-1]; - j = i; - while (in[j-inc-1] > v) { - in[j-1] = in[j-inc-1]; - j -= inc; - if (j <= inc) - break; - } - in[j-1] = v; - } - } while (inc > 1); - -} - - - -/******************************************************************************* - Functionname: FDKsbrEnc_AddVecLeft - ******************************************************************************* - - Description: - - Arguments: INT* dst, INT* length_dst, INT* src, INT length_src - - Return: none - -*******************************************************************************/ -void -FDKsbrEnc_AddVecLeft (INT *dst, INT *length_dst, INT *src, INT length_src) -{ - INT i; - - for (i = length_src - 1; i >= 0; i--) - FDKsbrEnc_AddLeft (dst, length_dst, src[i]); -} - - -/******************************************************************************* - Functionname: FDKsbrEnc_AddLeft - ******************************************************************************* - - Description: - - Arguments: INT* vector, INT* length_vector, INT value - - Return: none - -*******************************************************************************/ -void -FDKsbrEnc_AddLeft (INT *vector, INT *length_vector, INT value) -{ - INT i; - - for (i = *length_vector; i > 0; i--) - vector[i] = vector[i - 1]; - vector[0] = value; - (*length_vector)++; -} - - -/******************************************************************************* - Functionname: FDKsbrEnc_AddRight - ******************************************************************************* - - Description: - - Arguments: INT* vector, INT* length_vector, INT value - - Return: none - -*******************************************************************************/ -void -FDKsbrEnc_AddRight (INT *vector, INT *length_vector, INT value) -{ - vector[*length_vector] = value; - (*length_vector)++; -} - - - -/******************************************************************************* - Functionname: FDKsbrEnc_AddVecRight - ******************************************************************************* - - Description: - - Arguments: INT* dst, INT* length_dst, INT* src, INT length_src) - - Return: none - -*******************************************************************************/ -void -FDKsbrEnc_AddVecRight (INT *dst, INT *length_dst, INT *src, INT length_src) -{ - INT i; - for (i = 0; i < length_src; i++) - FDKsbrEnc_AddRight (dst, length_dst, src[i]); -} - - -/***************************************************************************** - - functionname: FDKsbrEnc_LSI_divide_scale_fract - - description: Calculates division with best precision and scales the result. - - return: num*scale/denom - -*****************************************************************************/ -FIXP_DBL FDKsbrEnc_LSI_divide_scale_fract(FIXP_DBL num, FIXP_DBL denom, FIXP_DBL scale) -{ - FIXP_DBL tmp = FL2FXCONST_DBL(0.0f); - if (num != FL2FXCONST_DBL(0.0f)) { - - INT shiftCommon; - INT shiftNum = CountLeadingBits(num); - INT shiftDenom = CountLeadingBits(denom); - INT shiftScale = CountLeadingBits(scale); - - num = num << shiftNum; - scale = scale << shiftScale; - - tmp = fMultDiv2(num,scale); - - if ( denom > (tmp >> fixMin(shiftNum+shiftScale-1,(DFRACT_BITS-1))) ) { - denom = denom << shiftDenom; - tmp = schur_div(tmp,denom,15); - shiftCommon = fixMin((shiftNum-shiftDenom+shiftScale-1),(DFRACT_BITS-1)); - if (shiftCommon < 0) - tmp <<= -shiftCommon; - else - tmp >>= shiftCommon; - } - else { - tmp = /*FL2FXCONST_DBL(1.0)*/ (FIXP_DBL)MAXVAL_DBL; - } - } - - return (tmp); -} - |