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livetrax/libs/midi++2/midimanager.cc

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/*
Copyright (C) 1998-99 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 <glib.h>
#include <pbd/error.h>
#include <midi++/types.h>
#include <midi++/manager.h>
#include <midi++/factory.h>
#include <midi++/channel.h>
#include <midi++/port_request.h>
using namespace std;
using namespace MIDI;
using namespace PBD;
/* XXX check for strdup leaks */
Manager *Manager::theManager = 0;
Manager::Manager ()
{
inputPort = 0;
outputPort = 0;
inputChannelNumber = 0;
outputChannelNumber = 0;
}
Manager::~Manager ()
{
PortMap::iterator i;
for (i = ports_by_device.begin(); i != ports_by_device.end(); i++) {
delete (*i).second;
}
ports_by_device.erase (ports_by_device.begin(), ports_by_device.end());
ports_by_tag.erase (ports_by_tag.begin(), ports_by_tag.end());
if (theManager == this) {
theManager = 0;
}
}
Port *
Manager::add_port (PortRequest &req)
{
PortFactory factory;
Port *port;
PortMap::iterator existing;
pair<string, Port *> newpair;
if ((existing = ports_by_device.find (req.devname)) !=
ports_by_device.end()) {
port = (*existing).second;
if (port->mode() == req.mode) {
/* Same mode - reuse the port, and just
create a new tag entry.
*/
newpair.first = req.tagname;
newpair.second = port;
ports_by_tag.insert (newpair);
return port;
}
/* If the existing is duplex, and this request
is not, then fail, because most drivers won't
allow opening twice with duplex and non-duplex
operation.
*/
if ((req.mode == O_RDWR && port->mode() != O_RDWR) ||
(req.mode != O_RDWR && port->mode() == O_RDWR)) {
error << "MIDIManager: port tagged \""
<< req.tagname
<< "\" cannot be opened duplex and non-duplex"
<< endmsg;
return 0;
}
/* modes must be different or complementary */
}
port = factory.create_port (req);
if (port == 0) {
return 0;
}
if (!port->ok()) {
delete port;
return 0;
}
newpair.first = port->name();
newpair.second = port;
ports_by_tag.insert (newpair);
newpair.first = port->device();
newpair.second = port;
ports_by_device.insert (newpair);
/* first port added becomes the default input
port.
*/
if (inputPort == 0) {
inputPort = port;
}
if (outputPort == 0) {
outputPort = port;
}
return port;
}
int
Manager::remove_port (string name)
{
PortMap::iterator res;
if ((res = ports_by_device.find (name)) == ports_by_device.end()) {
return -1;
}
ports_by_device.erase (res);
ports_by_device.erase ((*res).second->name());
delete (*res).second;
return 0;
}
int
Manager::set_input_port (string tag)
{
PortMap::iterator res;
bool found = false;
for (res = ports_by_tag.begin(); res != ports_by_tag.end(); res++) {
if (tag == (*res).first) {
found = true;
break;
}
}
if (!found) {
return -1;
}
inputPort = (*res).second;
return 0;
}
int
Manager::set_input_port (size_t portnum)
{
PortMap::iterator res;
for (res = ports_by_tag.begin(); res != ports_by_tag.end(); res++) {
if ((*res).second->number() == portnum) {
inputPort = (*res).second;
return 0;
}
}
return -1;
}
int
Manager::set_output_port (string tag)
{
PortMap::iterator res;
bool found = false;
for (res = ports_by_tag.begin(); res != ports_by_tag.end(); res++) {
if (tag == (*res).first) {
found = true;
break;
}
}
if (!found) {
return -1;
}
// XXX send a signal to say we're about to change output ports
if (outputPort) {
for (channel_t chan = 0; chan < 16; chan++) {
outputPort->channel (chan)->all_notes_off ();
}
}
outputPort = (*res).second;
// XXX send a signal to say we've changed output ports
return 0;
}
int
Manager::set_output_port (size_t portnum)
{
PortMap::iterator res;
for (res = ports_by_tag.begin(); res != ports_by_tag.end(); res++) {
if ((*res).second->number() == portnum) {
outputPort = (*res).second;
return 0;
}
}
return -1;
}
Port *
Manager::port (string name)
{
PortMap::iterator res;
for (res = ports_by_tag.begin(); res != ports_by_tag.end(); res++) {
if (name == (*res).first) {
return (*res).second;
}
}
return 0;
}
Port *
Manager::port (size_t portnum)
{
PortMap::iterator res;
for (res = ports_by_tag.begin(); res != ports_by_tag.end(); res++) {
if ((*res).second->number() == portnum) {
return (*res).second;
}
}
return 0;
}
int
Manager::foreach_port (int (*func)(const Port &, size_t, void *),
void *arg)
{
PortMap::const_iterator i;
int retval;
int n;
for (n = 0, i = ports_by_device.begin();
i != ports_by_device.end(); i++, n++) {
if ((retval = func (*((*i).second), n, arg)) != 0) {
return retval;
}
}
return 0;
}
int
Manager::parse_port_request (string str, Port::Type type)
{
PortRequest *req;
string::size_type colon;
string tag;
if (str.length() == 0) {
error << "MIDI: missing port specification" << endmsg;
return -1;
}
/* Port specifications look like:
devicename
devicename:tagname
devicename:tagname:mode
where
"devicename" is the full path to the requested file
"tagname" (optional) is the name used to refer to the
port. If not given, g_path_get_basename (devicename)
will be used.
"mode" (optional) is either "r" or "w" or something else.
if it is "r", the port will be opened
read-only, if "w", the port will be opened
write-only. Any other value, or no mode
specification at all, will cause the port to
be opened for reading and writing.
*/
req = new PortRequest;
colon = str.find_first_of (':');
if (colon != string::npos) {
req->devname = strdup (str.substr (0, colon).c_str());
} else {
req->devname = strdup (str.c_str());
}
if (colon < str.length()) {
tag = str.substr (colon+1);
/* see if there is a mode specification in the tag part */
colon = tag.find_first_of (':');
if (colon != string::npos) {
string modestr;
req->tagname = strdup (tag.substr (0, colon).c_str());
modestr = tag.substr (colon+1);
if (modestr == "r") {
req->mode = O_RDONLY;
} else if (modestr == "w") {
req->mode = O_WRONLY;
} else {
req->mode = O_RDWR;
}
} else {
req->tagname = strdup (tag.c_str());
req->mode = O_RDWR;
}
} else {
// check when tagname is freed
req->tagname = g_path_get_basename (req->devname);
req->mode = O_RDWR;
}
req->type = type;
if (MIDI::Manager::instance()->add_port (*req) == 0) {
return -1;
}
return 0;
}