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171 lines
6.6 KiB
171 lines
6.6 KiB
4 months ago
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/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of
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this software, even if advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------- */
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/******************* Library for basic calculation routines ********************
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Author(s):
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Description: fixed point intrinsics
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*******************************************************************************/
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#if !defined(CPLX_MUL_MIPS_H)
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#define CPLX_MUL_MIPS_H
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#if defined(__GNUC__) && defined(__mips__) && __mips_isa_rev < 6
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//#define FUNCTION_cplxMultDiv2_32x16
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//#define FUNCTION_cplxMultDiv2_32x16X2
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#define FUNCTION_cplxMultDiv2_32x32X2
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//#define FUNCTION_cplxMult_32x16
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//#define FUNCTION_cplxMult_32x16X2
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#define FUNCTION_cplxMult_32x32X2
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#if defined(FUNCTION_cplxMultDiv2_32x32X2)
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inline void cplxMultDiv2(FIXP_DBL *c_Re, FIXP_DBL *c_Im, FIXP_DBL a_Re,
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FIXP_DBL a_Im, FIXP_DBL b_Re, FIXP_DBL b_Im) {
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INT result;
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__asm__(
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"mult %[a_Re], %[b_Re];\n"
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"msub %[a_Im], %[b_Im];\n"
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"mfhi %[result];\n"
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: [result] "=r"(result)
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: [a_Re] "d"(a_Re), [b_Re] "d"(b_Re), [a_Im] "d"(a_Im), [b_Im] "d"(b_Im)
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: "lo");
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*c_Re = result;
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__asm__(
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"mult %[a_Re], %[b_Im];\n"
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"madd %[a_Im], %[b_Re];\n"
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"mfhi %[result];\n"
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: [result] "=r"(result)
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: [a_Re] "r"(a_Re), [b_Im] "r"(b_Im), [a_Im] "r"(a_Im), [b_Re] "r"(b_Re)
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: "lo");
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*c_Im = result;
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}
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#endif
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#if defined(FUNCTION_cplxMult_32x32X2)
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inline void cplxMult(FIXP_DBL *c_Re, FIXP_DBL *c_Im, FIXP_DBL a_Re,
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FIXP_DBL a_Im, FIXP_DBL b_Re, FIXP_DBL b_Im) {
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INT result;
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__asm__(
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"mult %[a_Re], %[b_Re];\n"
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"msub %[a_Im], %[b_Im];\n"
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"mfhi %[result];\n"
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//"extr_w %[result], 31;\n"
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: [result] "=r"(result)
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: [a_Re] "r"(a_Re), [b_Re] "r"(b_Re), [a_Im] "r"(a_Im), [b_Im] "r"(b_Im)
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: "lo");
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*c_Re = result << 1;
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__asm__(
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"mult %[a_Re], %[b_Im];\n"
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"madd %[a_Im], %[b_Re];\n"
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"mfhi %[result];\n"
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//"extr_w %[result], 31;\n"
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: [result] "=r"(result)
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: [a_Re] "r"(a_Re), [b_Im] "r"(b_Im), [a_Im] "r"(a_Im), [b_Re] "r"(b_Re)
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: "lo");
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*c_Im = result << 1;
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}
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#endif
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#endif /* defined(__GNUC__) && defined(__mips__) */
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#endif /* !defined(CPLX_MUL_MIPS_H) */
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