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+
+/* -----------------------------------------------------------------------------------------------------------
+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
+----------------------------------------------------------------------------------------------------------- */
+
+/******************************** MPEG Audio Encoder **************************
+
+   contents/description: ADIF Transport Headers writing
+
+******************************************************************************/
+
+#include "tpenc_adif.h"
+
+#include "tpenc_lib.h"
+#include "tpenc_asc.h"
+
+
+
+int adifWrite_EncodeHeader(ADIF_INFO *adif,
+                                 HANDLE_FDK_BITSTREAM hBs,
+                                 INT adif_buffer_fullness)
+{
+  /* ADIF/PCE/ADTS definitions */
+  const char adifId[5]="ADIF";
+  const int  copyRightIdPresent=0;
+  const int  originalCopy=0;
+  const int  home=0;
+
+  int i;
+
+  INT sampleRate = adif->samplingRate;
+  INT totalBitRate = adif->bitRate;
+
+  if (adif->headerWritten)
+    return 0;
+
+  /* Align inside PCE with respect to the first bit of the header */
+  UINT alignAnchor = FDKgetValidBits(hBs);
+
+  /* Signal variable bitrate if buffer fullnes exceeds 20 bit */
+  adif->bVariableRate = ( adif_buffer_fullness >= (INT)(0x1<<20) ) ? 1 : 0;
+
+  FDKwriteBits(hBs, adifId[0],8);
+  FDKwriteBits(hBs, adifId[1],8);
+  FDKwriteBits(hBs, adifId[2],8);
+  FDKwriteBits(hBs, adifId[3],8);
+
+
+  FDKwriteBits(hBs, copyRightIdPresent ? 1:0,1);
+
+  if(copyRightIdPresent) {
+    for(i=0;i<72;i++) {
+      FDKwriteBits(hBs,0,1);
+    }
+  }
+  FDKwriteBits(hBs, originalCopy ? 1:0,1);
+  FDKwriteBits(hBs, home ? 1:0,1);
+  FDKwriteBits(hBs, adif->bVariableRate?1:0, 1);
+  FDKwriteBits(hBs, totalBitRate,23);
+
+  /* we write only one PCE at the moment */
+  FDKwriteBits(hBs, 0, 4);
+
+  if(!adif->bVariableRate) {
+    FDKwriteBits(hBs, adif_buffer_fullness, 20);
+  }
+
+  /* Write PCE */
+  transportEnc_writePCE(hBs, adif->cm, sampleRate, adif->instanceTag, adif->profile, 0, 0, alignAnchor);
+
+  return 0;
+}
+
+int adifWrite_GetHeaderBits(ADIF_INFO *adif)
+{
+  /* ADIF definitions */
+  const int  copyRightIdPresent=0;
+
+  if (adif->headerWritten)
+    return 0;
+
+  int bits = 0;
+
+  bits += 8*4; /* ADIF ID */
+
+  bits += 1; /* Copyright present */
+
+  if (copyRightIdPresent)
+    bits += 72;          /* Copyright ID */
+
+  bits += 26;
+
+  bits += 4; /* Number of PCE's */
+
+  if(!adif->bVariableRate) {
+    bits += 20;
+  }
+
+  /* write PCE */
+  bits = transportEnc_GetPCEBits(adif->cm, 0, bits);
+
+  return bits;
+}
+