Added license boilerplate to all source files.

Change-Id: I42a702487e6db4953dca0027710ea4fe266052fd
Also:
 - Removed dead code in several source files.
 - Minor changes in comments.
 - No functional changes. No changes in executed code.
 - Added documentation PDFs.

1 files changed, 92 insertions, 31 deletions

diff --git a/libFDK/src/arm/dct_arm.cpp b/libFDK/src/arm/dct_arm.cpp
index dd0ca09..187c843 100644
--- a/libFDK/src/arm/dct_arm.cpp
+++ b/libFDK/src/arm/dct_arm.cpp
@@ -1,24 +1,85 @@
-/****************************************************************************
 
-                       (C) copyright Fraunhofer IIS (2004)
-                               All Rights Reserved
+/* -----------------------------------------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
 
-    Please be advised that this software and/or program delivery is
-    Confidential Information of Fraunhofer and subject to and covered by the
+© Copyright  1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
+  All rights reserved.
 
-    Fraunhofer IIS Software Evaluation Agreement
-    between Google Inc. and  Fraunhofer
-    effective and in full force since March 1, 2012.
+ 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.
 
-    You may use this software and/or program only under the terms and
-    conditions described in the above mentioned Fraunhofer IIS Software
-    Evaluation Agreement. Any other and/or further use requires a separate agreement.
+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.
 
- $Id$
+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
+----------------------------------------------------------------------------------------------------------- */
 
 
 
@@ -211,8 +272,8 @@ dct_IV_loop2_2nd_part:
 
 __asm void dst_IV_func1(
     int i,
-    const FIXP_SPK *twiddle, 
-    FIXP_DBL *pDat_0, 
+    const FIXP_SPK *twiddle,
+    FIXP_DBL *pDat_0,
     FIXP_DBL *pDat_1)
 {
     /* Register map:
@@ -235,7 +296,7 @@ dst_IV_loop1
     LDR     r6, [r2, #4]               // accu3 = pDat_0[1]
     RSB     r5, r5, #0                 // accu2 = -accu2
     SMULWT  r9, r5, r8                 // accuX = (-accu2)*val_tw.l
-    LDR     r4, [r3, #-4]              // accu1 = pDat_1[-1] 
+    LDR     r4, [r3, #-4]              // accu1 = pDat_1[-1]
     RSB     r9, r9, #0                 // accuX = -(-accu2)*val_tw.l
     SMLAWB  r9, r4, r8, r9             // accuX = accu1*val_tw.h-(-accu2)*val_tw.l
     SMULWT  r4, r4, r8                 // accu1 = accu1*val_tw.l
@@ -258,7 +319,7 @@ dst_IV_loop1
     LDR     r6, [r2, #4]               // accu3 = pDat_0[1]
     RSB     r5, r5, #0                 // accu2 = -accu2
     SMULWT  r9, r5, r8                 // accuX = (-accu2)*val_tw.l
-    LDR     r4, [r3, #-4]              // accu1 = pDat_1[-1] 
+    LDR     r4, [r3, #-4]              // accu1 = pDat_1[-1]
     RSB     r9, r9, #0                 // accuX = -(-accu2)*val_tw.l
     SMLAWB  r9, r4, r8, r9             // accuX = accu1*val_tw.h-(-accu2)*val_tw.l
     SMULWT  r4, r4, r8                 // accu1 = accu1*val_tw.l
@@ -286,18 +347,18 @@ dst_IV_loop1
 
 #ifdef FUNCTION_dst_IV_func2
 
-FDK_INLINE 
+FDK_INLINE
 /* __attribute__((noinline)) */
 static void dst_IV_func2(
     int i,
     const FIXP_SPK *twiddle,
-    FIXP_DBL *RESTRICT pDat_0, 
+    FIXP_DBL *RESTRICT pDat_0,
     FIXP_DBL *RESTRICT pDat_1,
     int inc)
 {
   FIXP_DBL accu1,accu2,accu3,accu4;
   LONG val_tw;
-  
+
   accu4 = pDat_0[0];
   accu3 = pDat_0[1];
   accu4 >>= 1;
@@ -310,17 +371,17 @@ static void dst_IV_func2(
   *pDat_0++ = accu3;
   *pDat_1-- = accu4;
 
-  
+
   __asm
   {
     B       dst_IV_loop2_2nd_part
-    
+
     /* 50 cycles for 2 iterations = 25 cycles/iteration */
 
 dst_IV_loop2:
 
     LDR     val_tw, [twiddle], inc, LSL #2    // val_tw = *twiddle; twiddle += inc
-    
+
     RSB     accu2, accu2, #0                  // accu2 = -accu2
     RSB     accu1, accu1, #0                  // accu1 = -accu1
     SMULWT  accu3, accu2, val_tw              // accu3 = (-accu2)*val_tw.l
@@ -330,10 +391,10 @@ dst_IV_loop2:
     SMLAWB  accu2, accu2, val_tw, accu4       // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h
     STR     accu1, [pDat_1], #-4              // *pDat_1-- = accu1
   	STR     accu2, [pDat_0], #4               // *pDat_0++ = accu2
-  	
+
   	LDR     accu4, [pDat_0]                   // accu4 = pDat_0[0]
   	LDR     accu3, [pDat_0, #4]               // accu3 = pDat_0[1]
-  	
+
     RSB     accu4, accu4, #0                  // accu4 = -accu4
     RSB     accu3, accu3, #0                  // accu3 = -accu3
 
@@ -345,14 +406,14 @@ dst_IV_loop2:
 
     LDR     accu1, [pDat_1, #-4]              // accu1 = pDat_1[-1]
     LDR     accu2, [pDat_1]                   // accu2 = pDat_1[0]
-    
+
     STR     accu3, [pDat_0], #4               // *pDat_0++ = accu3
     STR     accu4, [pDat_1], #-4              // *pDat_1-- = accu4
 
 dst_IV_loop2_2nd_part:
 
     LDR     val_tw, [twiddle], inc, LSL #2    // val_tw = *twiddle; twiddle += inc
-    
+
     RSB     accu2, accu2, #0                  // accu2 = -accu2
     RSB     accu1, accu1, #0                  // accu1 = -accu1
     SMULWT  accu3, accu2, val_tw              // accu3 = (-accu2)*val_tw.l
@@ -362,10 +423,10 @@ dst_IV_loop2_2nd_part:
     SMLAWB  accu2, accu2, val_tw, accu4       // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h
     STR     accu1, [pDat_1], #-4              // *pDat_1-- = accu1
   	STR     accu2, [pDat_0], #4               // *pDat_0++ = accu2
-  	
+
   	LDR     accu4, [pDat_0]                   // accu4 = pDat_0[0]
   	LDR     accu3, [pDat_0, #4]               // accu3 = pDat_0[1]
-  	
+
     RSB     accu4, accu4, #0                  // accu4 = -accu4
     RSB     accu3, accu3, #0                  // accu3 = -accu3
 
@@ -377,14 +438,14 @@ dst_IV_loop2_2nd_part:
 
     LDR     accu1, [pDat_1, #-4]              // accu1 = pDat_1[-1]
     LDR     accu2, [pDat_1]                   // accu2 = pDat_1[0]
-    
+
     STR     accu3, [pDat_0], #4               // *pDat_0++ = accu3
     STR     accu4, [pDat_1], #-4              // *pDat_1-- = accu4
 
     SUBS    i, i, #1
     BNE     dst_IV_loop2
   }
-  
+
   /* Last Sin and Cos value pair are the same */
   accu1 = fMultDiv2(-accu1, WTC(0x5a82799a));
   accu2 = fMultDiv2(-accu2, WTC(0x5a82799a));