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Diffstat (limited to 'fdk-aac/libFDK/src/mips/fft_rad2_mips.cpp')
| -rw-r--r-- | fdk-aac/libFDK/src/mips/fft_rad2_mips.cpp | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/fdk-aac/libFDK/src/mips/fft_rad2_mips.cpp b/fdk-aac/libFDK/src/mips/fft_rad2_mips.cpp new file mode 100644 index 0000000..7db8b4e --- /dev/null +++ b/fdk-aac/libFDK/src/mips/fft_rad2_mips.cpp @@ -0,0 +1,165 @@ +/* ----------------------------------------------------------------------------- +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): + + Description: dit_fft MIPS assembler replacements. + +*******************************************************************************/ + +#ifndef __FFT_RAD2_CPP__ +#error \ + "Do not compile this file separately. It is included on demand from fft_rad2.cpp" +#endif + +#if defined(MIPS_DSP_LIB) + +#include "dsplib_util.h" +#include "dsplib_dsp.h" + +#define FUNCTION_dit_fft + +#ifdef FUNCTION_dit_fft + +#include "mips_fft_twiddles.cpp" + +void dit_fft(FIXP_DBL *x, const INT ldn, const FIXP_STP *trigdata, + const INT trigDataSize) { + int i; + + int32c *din = (int32c *)x; + int32c *dout = (int32c *)x; + + int32c scratch[1024]; + int32c *twiddles; + + switch (ldn) { + case 4: + twiddles = (int32c *)__twiddles_mips_fft32_16; + break; + case 5: + twiddles = (int32c *)__twiddles_mips_fft32_32; + break; + case 6: + twiddles = (int32c *)__twiddles_mips_fft32_64; + break; + case 7: + twiddles = (int32c *)__twiddles_mips_fft32_128; + break; + case 8: + twiddles = (int32c *)__twiddles_mips_fft32_256; + break; + case 9: + twiddles = (int32c *)__twiddles_mips_fft32_512; + break; + case 10: + twiddles = (int32c *)__twiddles_mips_fft32_1024; + break; + default: + FDK_ASSERT(0); + break; + } + + mips_fft32(dout, din, twiddles, scratch, ldn); + + for (i = 0; i < (1 << ldn); i++) { + x[2 * i] = dout[i].re << 1; + x[2 * i + 1] = dout[i].im << 1; + } +} +#endif + +#endif /* defined(MIPS_DSP_LIB) */ |