diff options
Diffstat (limited to 'libSBRdec/src/arm/lpp_tran_arm.cpp')
| -rw-r--r-- | libSBRdec/src/arm/lpp_tran_arm.cpp | 186 |
1 files changed, 97 insertions, 89 deletions
diff --git a/libSBRdec/src/arm/lpp_tran_arm.cpp b/libSBRdec/src/arm/lpp_tran_arm.cpp index 78bbc2c..db1948f 100644 --- a/libSBRdec/src/arm/lpp_tran_arm.cpp +++ b/libSBRdec/src/arm/lpp_tran_arm.cpp @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- 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. +© Copyright 1995 - 2018 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. +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: +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 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 +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. +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. +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." +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. +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. +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. +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 @@ -79,73 +90,70 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ -/******************************** Fraunhofer IIS *************************** +/**************************** SBR decoder library ****************************** Author(s): Arthur Tritthart - Description: (ARM optimised) LPP transposer subroutines -******************************************************************************/ + Description: (ARM optimised) LPP transposer subroutines +*******************************************************************************/ #if defined(__arm__) - #define FUNCTION_LPPTRANSPOSER_func1 #ifdef FUNCTION_LPPTRANSPOSER_func1 -/* Note: This code requires only 43 cycles per iteration instead of 61 on ARM926EJ-S */ -__attribute__ ((noinline)) static void lppTransposer_func1( - FIXP_DBL *lowBandReal, - FIXP_DBL *lowBandImag, - FIXP_DBL **qmfBufferReal, - FIXP_DBL **qmfBufferImag, - int loops, - int hiBand, - int dynamicScale, - int descale, - FIXP_SGL a0r, - FIXP_SGL a0i, - FIXP_SGL a1r, - FIXP_SGL a1i) -{ - +/* Note: This code requires only 43 cycles per iteration instead of 61 on + * ARM926EJ-S */ +static void lppTransposer_func1(FIXP_DBL *lowBandReal, FIXP_DBL *lowBandImag, + FIXP_DBL **qmfBufferReal, + FIXP_DBL **qmfBufferImag, int loops, int hiBand, + int dynamicScale, int descale, FIXP_SGL a0r, + FIXP_SGL a0i, FIXP_SGL a1r, FIXP_SGL a1i, + const int fPreWhitening, + FIXP_DBL preWhiteningGain, + int preWhiteningGains_sf) { FIXP_DBL real1, real2, imag1, imag2, accu1, accu2; real2 = lowBandReal[-2]; real1 = lowBandReal[-1]; imag2 = lowBandImag[-2]; imag1 = lowBandImag[-1]; - for(int i=0; i < loops; i++) - { - accu1 = fMultDiv2( a0r,real1); - accu2 = fMultDiv2( a0i,imag1); - accu1 = fMultAddDiv2(accu1,a1r,real2); - accu2 = fMultAddDiv2(accu2,a1i,imag2); - real2 = fMultDiv2( a1i,real2); + for (int i = 0; i < loops; i++) { + accu1 = fMultDiv2(a0r, real1); + accu2 = fMultDiv2(a0i, imag1); + accu1 = fMultAddDiv2(accu1, a1r, real2); + accu2 = fMultAddDiv2(accu2, a1i, imag2); + real2 = fMultDiv2(a1i, real2); accu1 = accu1 - accu2; accu1 = accu1 >> dynamicScale; - accu2 = fMultAddDiv2(real2,a1r,imag2); + accu2 = fMultAddDiv2(real2, a1r, imag2); real2 = real1; imag2 = imag1; - accu2 = fMultAddDiv2(accu2,a0i,real1); + accu2 = fMultAddDiv2(accu2, a0i, real1); real1 = lowBandReal[i]; - accu2 = fMultAddDiv2(accu2,a0r,imag1); + accu2 = fMultAddDiv2(accu2, a0r, imag1); imag1 = lowBandImag[i]; accu2 = accu2 >> dynamicScale; accu1 <<= 1; accu2 <<= 1; - - qmfBufferReal[i][hiBand] = accu1 + (real1>>descale); - qmfBufferImag[i][hiBand] = accu2 + (imag1>>descale); + accu1 += (real1 >> descale); + accu2 += (imag1 >> descale); + if (fPreWhitening) { + accu1 = scaleValueSaturate(fMultDiv2(accu1, preWhiteningGain), + preWhiteningGains_sf); + accu2 = scaleValueSaturate(fMultDiv2(accu2, preWhiteningGain), + preWhiteningGains_sf); + } + qmfBufferReal[i][hiBand] = accu1; + qmfBufferImag[i][hiBand] = accu2; } } -#endif /* #ifdef FUNCTION_LPPTRANSPOSER_func1 */ -#endif /* __arm__ */ - - +#endif /* #ifdef FUNCTION_LPPTRANSPOSER_func1 */ +#endif /* __arm__ */ |