aes.c
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/*
Audio File Library
Copyright (C) 1998-1999, Michael Pruett <michael@68k.org>
Copyright (C) 2000, Silicon Graphics, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307 USA.
*/
/*
aes.c
This file contains routines for dealing with AES recording data.
*/
#include <string.h>
#include <assert.h>
#include "audiofile.h"
#include "afinternal.h"
#include "util.h"
void afInitAESChannelData (AFfilesetup setup, int trackid)
{
_TrackSetup *track;
if (!_af_filesetup_ok(setup))
return;
if ((track = _af_filesetup_get_tracksetup(setup, trackid)) == NULL)
return;
track->aesDataSet = AF_TRUE;
}
void afInitAESChannelDataTo (AFfilesetup setup, int trackid, int willBeData)
{
_TrackSetup *track;
if (!_af_filesetup_ok(setup))
return;
if ((track = _af_filesetup_get_tracksetup(setup, trackid)) == NULL)
return;
track->aesDataSet = willBeData;
}
/*
What is with these return values?
*/
int afGetAESChannelData (AFfilehandle file, int trackid, unsigned char buf[24])
{
_Track *track;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return -1;
if (track->hasAESData == AF_FALSE)
{
if (buf)
memset(buf, 0, 24);
return 0;
}
if (buf)
memcpy(buf, track->aesData, 24);
return 1;
}
void afSetAESChannelData (AFfilehandle file, int trackid, unsigned char buf[24])
{
_Track *track;
if ((track = _af_filehandle_get_track(file, trackid)) == NULL)
return;
if (!_af_filehandle_can_write(file))
return;
if (track->hasAESData)
{
memcpy(track->aesData, buf, 24);
}
else
{
_af_error(AF_BAD_NOAESDATA,
"unable to store AES channel status data for track %d",
trackid);
}
}