From 9bf37cc9712506b2483650c82d3c41152337ef7e Mon Sep 17 00:00:00 2001
From: Dave Burke <daveburke@google.com>
Date: Tue, 17 Apr 2012 09:51:45 -0700
Subject: Fraunhofer AAC codec.

License boilerplate update to follow.

Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
---
 libMpegTPEnc/src/tpenc_adif.cpp | 120 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 120 insertions(+)
 create mode 100644 libMpegTPEnc/src/tpenc_adif.cpp

(limited to 'libMpegTPEnc/src/tpenc_adif.cpp')

diff --git a/libMpegTPEnc/src/tpenc_adif.cpp b/libMpegTPEnc/src/tpenc_adif.cpp
new file mode 100644
index 0000000..d217643
--- /dev/null
+++ b/libMpegTPEnc/src/tpenc_adif.cpp
@@ -0,0 +1,120 @@
+/******************************** MPEG Audio Encoder **************************
+
+                     (C) Copyright Fraunhofer IIS (2009)
+                               All Rights Reserved
+
+    Please be advised that this software and/or program delivery is
+    Confidential Information of Fraunhofer and subject to and covered by the
+
+    Fraunhofer IIS Software Evaluation Agreement
+    between Google Inc. and  Fraunhofer
+    effective and in full force since March 1, 2012.
+
+    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.
+
+
+   This software and/or program is protected by copyright law and international
+   treaties. Any reproduction or distribution of this software and/or program,
+   or any portion of it, may result in severe civil and criminal penalties, and
+   will be prosecuted to the maximum extent possible under law.
+
+   $Id$
+   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;
+}
+
-- 
cgit v1.2.3