Snapshot 2bda038c163298531d47394bc2c09e1409c5d0db

Change-Id: If584e579464f28b97d50e51fc76ba654a5536c54

1 files changed, 151 insertions, 0 deletions

diff --git a/libSBRdec/src/arm/lpp_tran_arm.cpp b/libSBRdec/src/arm/lpp_tran_arm.cpp
new file mode 100644
index 0000000..541e7c7
--- /dev/null
+++ b/libSBRdec/src/arm/lpp_tran_arm.cpp
@@ -0,0 +1,151 @@
+
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2012 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
+----------------------------------------------------------------------------------------------------------- */
+
+/********************************  Fraunhofer IIS  ***************************
+
+   Author(s):   Arthur Tritthart
+   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)
+{
+
+  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);
+    accu1 = accu1 - accu2;
+    accu1 = accu1 >> dynamicScale;
+
+    accu2 = fMultAddDiv2(real2,a1r,imag2);
+    real2 = real1;
+    imag2 = imag1;
+    accu2 = fMultAddDiv2(accu2,a0i,real1);
+    real1 = lowBandReal[i];
+    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);
+  }
+}
+#endif  /* #ifdef FUNCTION_LPPTRANSPOSER_func1 */
+#endif  /* __arm__ */
+
+
+