diff options
Diffstat (limited to 'fdk-aac/libFDK/src/arm/scale_arm.cpp')
| -rw-r--r-- | fdk-aac/libFDK/src/arm/scale_arm.cpp | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/fdk-aac/libFDK/src/arm/scale_arm.cpp b/fdk-aac/libFDK/src/arm/scale_arm.cpp new file mode 100644 index 0000000..92c9edc --- /dev/null +++ b/fdk-aac/libFDK/src/arm/scale_arm.cpp @@ -0,0 +1,174 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© 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. + +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 +----------------------------------------------------------------------------- */ + +/******************* Library for basic calculation routines ******************** + + Author(s): Arthur Tritthart + + Description: Scaling operations for ARM + +*******************************************************************************/ + +/* prevent multiple inclusion with re-definitions */ +#ifndef __INCLUDE_SCALE_ARM__ +#define __INCLUDE_SCALE_ARM__ + +#if !defined(FUNCTION_scaleValuesWithFactor_DBL) +#define FUNCTION_scaleValuesWithFactor_DBL +SCALE_INLINE +void scaleValuesWithFactor(FIXP_DBL *vector, FIXP_DBL factor, INT len, + INT scalefactor) { + /* This code combines the fMult with the scaling */ + /* It performs a fMultDiv2 and increments shift by 1 */ + int shift = scalefactor + 1; + FIXP_DBL *mySpec = vector; + + shift = fixmin_I(shift, (INT)DFRACT_BITS - 1); + + if (shift >= 0) { + for (int i = 0; i < (len >> 2); i++) { + FIXP_DBL tmp0 = mySpec[0]; + FIXP_DBL tmp1 = mySpec[1]; + FIXP_DBL tmp2 = mySpec[2]; + FIXP_DBL tmp3 = mySpec[3]; + tmp0 = fMultDiv2(tmp0, factor); + tmp1 = fMultDiv2(tmp1, factor); + tmp2 = fMultDiv2(tmp2, factor); + tmp3 = fMultDiv2(tmp3, factor); + tmp0 <<= shift; + tmp1 <<= shift; + tmp2 <<= shift; + tmp3 <<= shift; + *mySpec++ = tmp0; + *mySpec++ = tmp1; + *mySpec++ = tmp2; + *mySpec++ = tmp3; + } + for (int i = len & 3; i--;) { + FIXP_DBL tmp0 = mySpec[0]; + tmp0 = fMultDiv2(tmp0, factor); + tmp0 <<= shift; + *mySpec++ = tmp0; + } + } else { + shift = -shift; + for (int i = 0; i < (len >> 2); i++) { + FIXP_DBL tmp0 = mySpec[0]; + FIXP_DBL tmp1 = mySpec[1]; + FIXP_DBL tmp2 = mySpec[2]; + FIXP_DBL tmp3 = mySpec[3]; + tmp0 = fMultDiv2(tmp0, factor); + tmp1 = fMultDiv2(tmp1, factor); + tmp2 = fMultDiv2(tmp2, factor); + tmp3 = fMultDiv2(tmp3, factor); + tmp0 >>= shift; + tmp1 >>= shift; + tmp2 >>= shift; + tmp3 >>= shift; + *mySpec++ = tmp0; + *mySpec++ = tmp1; + *mySpec++ = tmp2; + *mySpec++ = tmp3; + } + for (int i = len & 3; i--;) { + FIXP_DBL tmp0 = mySpec[0]; + tmp0 = fMultDiv2(tmp0, factor); + tmp0 >>= shift; + *mySpec++ = tmp0; + } + } +} +#endif /* #if !defined(FUNCTION_scaleValuesWithFactor_DBL) */ + +#endif /* #ifndef __INCLUDE_SCALE_ARM__ */ |