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/******************************** 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;
}
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