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/*
Copyright (C) 2010 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file libs/pbd/sndfile_manager.cc
* @brief A FileDescriptor for files opened using libsndfile.
*/
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <cassert>
#include "pbd/compose.h"
#include "pbd/sndfile_manager.h"
#include "pbd/debug.h"
using namespace std;
using namespace PBD;
/** @param file_name Filename.
* @param writeable true to open writeable, otherwise false.
* @param info SF_INFO for the file.
*/
SndFileDescriptor::SndFileDescriptor (string const & file_name, bool writeable, SF_INFO* info)
: FileDescriptor (file_name, writeable)
, _sndfile (0)
, _info (info)
{
manager()->add (this);
}
SndFileDescriptor::~SndFileDescriptor ()
{
manager()->remove (this);
}
/** @return SNDFILE*, or 0 on error */
SNDFILE*
SndFileDescriptor::allocate ()
{
bool const f = manager()->allocate (this);
if (f) {
return 0;
}
/* this is ok thread-wise because allocate () has incremented
the Descriptor's refcount, so the file will not be closed
*/
return _sndfile;
}
void
SndFileDescriptor::close ()
{
/* we must have a lock on the FileManager's mutex */
assert (_sndfile);
sf_close (_sndfile);
_sndfile = 0;
}
bool
SndFileDescriptor::is_open () const
{
/* we must have a lock on the FileManager's mutex */
return _sndfile != 0;
}
bool
SndFileDescriptor::open ()
{
/* we must have a lock on the FileManager's mutex */
_sndfile = sf_open (_path.c_str(), _writeable ? SFM_RDWR : SFM_READ, _info);
return (_sndfile == 0);
}
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