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/*
Copyright (C) 1999 Paul Barton-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.
$Id$
*/
#include <fcntl.h>
#include <cerrno>
#include <cstring>
#include <sys/time.h>
#include <../pbd/pbd/error.h>
#include <../pbd/pbd/pathscanner.h>
#include <midi++/types.h>
#include <midi++/fd_midiport.h>
using namespace std;
using namespace MIDI;
string *FD_MidiPort::midi_dirpath = 0;
string *FD_MidiPort::midi_filename_pattern = 0;
FD_MidiPort::FD_MidiPort (PortRequest &req,
const string &dirpath,
const string &pattern)
: Port (req)
{
open (req);
if (_fd < 0) {
switch (errno) {
case EBUSY:
error << "MIDI: port device in use" << endmsg;
req.status = PortRequest::Busy;
break;
case ENOENT:
error << "MIDI: no such port device" << endmsg;
req.status = PortRequest::NoSuchFile;
break;
case EACCES:
error << "MIDI: access to port denied" << endmsg;
req.status = PortRequest::NotAllowed;
break;
default:
req.status = PortRequest::Unknown;
}
} else {
_ok = true;
req.status = PortRequest::OK;
if (midi_dirpath == 0) {
midi_dirpath = new string (dirpath);
midi_filename_pattern = new string (pattern);
}
if ((req.mode & O_NONBLOCK) == 0) {
/* we unconditionally set O_NONBLOCK during
open, but the request didn't ask for it,
so remove it.
*/
int flags = fcntl (_fd, F_GETFL, 0);
fcntl (_fd, F_SETFL, flags & ~(O_NONBLOCK));
}
}
}
void
FD_MidiPort::open (PortRequest &req)
{
int mode = req.mode | O_NONBLOCK;
_fd = ::open (req.devname, mode);
}
vector<string *> *
FD_MidiPort::list_devices ()
{
PathScanner scanner;
return scanner (*midi_dirpath, *midi_filename_pattern, false, true);
}
int
FD_MidiPort::selectable () const
{
long flags;
/* turn on non-blocking mode, since we plan to use select/poll
to tell us when there is data to read.
*/
flags = fcntl (_fd, F_GETFL);
flags |= O_NONBLOCK;
if (fcntl (_fd, F_SETFL, flags)) {
error << "FD_MidiPort: could not turn on non-blocking mode"
<< " (" << strerror (errno)
<< ')'
<< endmsg;
return -1;
}
return _fd;
}
int
FD_MidiPort::do_slow_write (byte *msg, unsigned int msglen)
{
size_t n;
size_t i;
for (n = 0; n < msglen; n++) {
if (::write (_fd, &msg[n], 1) != 1) {
break;
}
bytes_written++;
for (i = 0; i < slowdown * 10000; i++);
}
if (n && output_parser) {
output_parser->raw_preparse (*output_parser, msg, n, get_current_host_time());
for (unsigned int i = 0; i < n; i++) {
output_parser->scanner (msg[i]);
}
output_parser->raw_postparse (*output_parser, msg, n);
}
return n;
}
int
FD_MidiPort::read (byte* buf, size_t max)
{
int nread;
if ((_mode & O_ACCMODE) == O_WRONLY) {
return -EACCES;
}
// cerr << "MIDI: read up to " << max << " from " << _fd << " (" << name() << ')' << endl;
if ((nread = ::read (_fd, buf, max)) > 0) {
bytes_read += nread;
// cerr << " read " << nread << endl;
if (input_parser) {
input_parser->raw_preparse
(*input_parser, buf, nread, get_current_host_time());
for (int i = 0; i < nread; i++) {
input_parser->scanner (buf[i]);
}
input_parser->raw_postparse
(*input_parser, buf, nread);
}
}
return nread;
}
timestamp_t FD_MidiPort::get_current_host_time()
{
struct timeval tv;
gettimeofday(&tv, NULL);
return (timestamp_t)(tv.tv_usec * 1e-6) + (timestamp_t)(tv.tv_sec);
}
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