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/*
Copyright (C) 2013 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.
*/
#include <iostream>
#include <boost/scoped_ptr.hpp>
#include <glibmm/timer.h>
#include "pbd/epa.h"
#include "jack_connection.h"
#include "jack_utils.h"
#define GET_PRIVATE_JACK_POINTER(j) jack_client_t* _priv_jack = (jack_client_t*) (j); if (!_priv_jack) { return; }
#define GET_PRIVATE_JACK_POINTER_RET(j,r) jack_client_t* _priv_jack = (jack_client_t*) (j); if (!_priv_jack) { return r; }
using namespace ARDOUR;
using namespace PBD;
using std::string;
using std::vector;
using std::cerr;
using std::endl;
bool JackConnection::_in_control = false;
static void jack_halted_callback (void* arg)
{
JackConnection* jc = static_cast<JackConnection*> (arg);
jc->halted_callback ();
}
static void jack_halted_info_callback (jack_status_t code, const char* reason, void* arg)
{
JackConnection* jc = static_cast<JackConnection*> (arg);
jc->halted_info_callback (code, reason);
}
JackConnection::JackConnection (const std::string& arg1, const std::string& arg2)
: _jack (0)
, _client_name (arg1)
, session_uuid (arg2)
, _probed_buffer_size (0)
, _probed_sample_rate (0)
{
/* See if the server is already up
*/
EnvironmentalProtectionAgency* global_epa = EnvironmentalProtectionAgency::get_global_epa ();
boost::scoped_ptr<EnvironmentalProtectionAgency> current_epa;
/* revert all environment settings back to whatever they were when
* ardour started, because ardour's startup script may have reset
* something in ways that interfere with finding/starting JACK.
*/
if (global_epa) {
current_epa.reset (new EnvironmentalProtectionAgency(true)); /* will restore settings when we leave scope */
global_epa->restore ();
}
jack_status_t status;
jack_client_t* c = jack_client_open ("ardourprobe", JackNoStartServer, &status);
if (status == 0) {
_probed_buffer_size = jack_get_buffer_size(c);
_probed_sample_rate = jack_get_sample_rate(c);
jack_client_close (c);
_in_control = false;
} else {
_in_control = true;
}
}
JackConnection::~JackConnection ()
{
close ();
}
int
JackConnection::open ()
{
EnvironmentalProtectionAgency* global_epa = EnvironmentalProtectionAgency::get_global_epa ();
boost::scoped_ptr<EnvironmentalProtectionAgency> current_epa;
jack_status_t status;
close ();
/* revert all environment settings back to whatever they were when ardour started
*/
if (global_epa) {
current_epa.reset (new EnvironmentalProtectionAgency(true)); /* will restore settings when we leave scope */
global_epa->restore ();
}
/* ensure that PATH or equivalent includes likely locations of the JACK
* server, in case the user's default does not.
*/
vector<string> dirs;
get_jack_server_dir_paths (dirs);
set_path_env_for_jack_autostart (dirs);
if ((_jack = jack_client_open (_client_name.c_str(), JackSessionID, &status, session_uuid.c_str())) == 0) {
return -1;
}
if (status & JackNameNotUnique) {
_client_name = jack_get_client_name (_jack);
}
/* attach halted handler */
if (jack_on_info_shutdown) {
jack_on_info_shutdown (_jack, jack_halted_info_callback, this);
} else {
jack_on_shutdown (_jack, jack_halted_callback, this);
}
Connected(); /* EMIT SIGNAL */
return 0;
}
int
JackConnection::close ()
{
GET_PRIVATE_JACK_POINTER_RET (_jack, -1);
if (_priv_jack) {
int ret = jack_client_close (_priv_jack);
_jack = 0;
/* If we started JACK, it will be closing down */
Glib::usleep (500000);
Disconnected (""); /* EMIT SIGNAL */
return ret;
}
return 0;
}
void
JackConnection::halted_callback ()
{
_jack = 0;
std::cerr << "JACK HALTED\n";
Disconnected ("");
}
void
JackConnection::halted_info_callback (jack_status_t /*status*/, const char* reason)
{
_jack = 0;
std::cerr << "JACK HALTED: " << reason << std::endl;
Disconnected (reason);
}
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