add new control protocol related files
git-svn-id: svn://localhost/trunk/ardour2@443 d708f5d6-7413-0410-9779-e7cbd77b26cf
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48
libs/ardour/ardour/control_protocol_manager.h
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48
libs/ardour/ardour/control_protocol_manager.h
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#ifndef ardour_control_protocol_manager_h
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#define ardour_control_protocol_manager_h
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#include <string>
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#include <list>
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#include <pbd/lockmonitor.h>
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namespace ARDOUR {
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class ControlProtocol;
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class ControlProtocolDescriptor;
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struct ControlProtocolInfo {
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ControlProtocolDescriptor* descriptor;
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ControlProtocol* protocol;
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std::string name;
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std::string path;
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};
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class ControlProtocolManager
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{
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public:
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ControlProtocolManager ();
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~ControlProtocolManager ();
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static ControlProtocolManager& instance() { return *_instance; }
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void discover_control_protocols (std::string search_path);
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void startup (Session&);
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ControlProtocol* instantiate (Session&, std::string protocol_name);
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int teardown (std::string protocol_name);
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private:
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static ControlProtocolManager* _instance;
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PBD::Lock protocols_lock;
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std::list<ControlProtocolInfo*> control_protocol_info;
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std::list<ControlProtocol*> control_protocols;
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int control_protocol_discover (std::string path);
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ControlProtocolDescriptor* get_descriptor (std::string path);
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};
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} // namespace
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#endif // ardour_control_protocol_manager_h
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242
libs/ardour/control_protocol.cc
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242
libs/ardour/control_protocol.cc
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/*
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Copyright (C) 2006 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <poll.h>
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#include <pbd/pthread_utils.h>
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#include <pbd/error.h>
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#include <ardour/control_protocol.h>
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#include <ardour/configuration.h>
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#include <ardour/session.h>
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using namespace ARDOUR;
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using namespace std;
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#include "i18n.h"
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ControlProtocol::ControlProtocol (Session& s, string str)
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: session (s),
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_name (str)
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{
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active_thread = 1;
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}
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ControlProtocol::~ControlProtocol ()
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{
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}
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void
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ControlProtocol::set_send (SendWhat sw)
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{
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_send = sw;
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}
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int
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ControlProtocol::init_thread ()
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{
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if (pipe (thread_request_pipe) != 0) {
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error << string_compose (_("%1: cannot create thread request pipe (%1)"), _name, strerror (errno))
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<< endmsg;
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return -1;
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}
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if (fcntl (thread_request_pipe[0], F_SETFL, O_NONBLOCK)) {
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error << string_compose(_("%1: cannot set O_NONBLOCK on read pipe (%2)"), _name, strerror (errno)) << endmsg;
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return -1;
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}
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if (fcntl (thread_request_pipe[1], F_SETFL, O_NONBLOCK)) {
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error << string_compose(_("%1: cannot set O_NONBLOCK on signal write pipe (%2)"), _name, strerror (errno)) << endmsg;
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return -1;
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}
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if (pthread_create_and_store ("tranzport delivery", &_thread, 0, _thread_work, this)) {
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error << string_compose (_("%1: could not create thread"), _name) << endmsg;
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return -1;
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}
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return 0;
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}
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int
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ControlProtocol::poke_thread (ThreadRequest::Type why)
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{
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char c = (char) why;
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return !(write (thread_request_pipe[1], &c, 1) == 1);
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}
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int
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ControlProtocol::start_thread ()
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{
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return poke_thread (ThreadRequest::Start);
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}
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int
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ControlProtocol::stop_thread ()
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{
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return poke_thread (ThreadRequest::Stop);
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}
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void
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ControlProtocol::set_active (bool yn)
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{
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if (yn != active_thread) {
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if (yn) {
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/* make sure the feedback thread is alive */
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start_thread ();
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} else {
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/* maybe put the feedback thread to sleep */
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stop_thread ();
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}
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ActiveChanged ();
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}
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}
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void
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ControlProtocol::terminate_thread ()
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{
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void* status;
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poke_thread (ThreadRequest::Quit);
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pthread_join (_thread, &status);
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}
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void*
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ControlProtocol::_thread_work (void* arg)
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{
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return static_cast<ControlProtocol*> (arg)->thread_work ();
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}
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void*
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ControlProtocol::thread_work ()
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{
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PBD::ThreadCreated (pthread_self(), _name);
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struct pollfd pfd[1];
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int timeout;
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struct sched_param rtparam;
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int err;
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memset (&rtparam, 0, sizeof (rtparam));
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rtparam.sched_priority = 3; /* XXX should be relative to audio (JACK) thread */
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if ((err = pthread_setschedparam (pthread_self(), SCHED_FIFO, &rtparam)) != 0) {
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// do we care? not particularly.
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info << string_compose (_("%1: delivery thread not running with realtime scheduling (%2)"), _name, strerror (errno)) << endmsg;
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}
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pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0);
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pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
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if (active_thread) {
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timeout = max (5, (int) Config->get_feedback_interval_ms());
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} else {
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timeout = -1;
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}
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while (1) {
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pfd[0].fd = thread_request_pipe[0];
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pfd[0].events = POLLIN|POLLHUP|POLLERR;
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if (poll (pfd, 1, timeout) < 0) {
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if (errno == EINTR) {
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continue;
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}
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error << string_compose (_("Protocol \"%1\" thread: poll failed (%2)"), _name, strerror (errno))
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<< endmsg;
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break;
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}
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if (pfd[0].revents & ~POLLIN) {
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error << string_compose (_("Error thread request pipe for protocol \"%1\""), _name) << endmsg;
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break;
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}
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if (pfd[0].revents & POLLIN) {
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char req;
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/* empty the pipe of all current requests */
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while (1) {
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size_t nread = read (thread_request_pipe[0], &req, sizeof (req));
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if (nread == 1) {
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switch ((ThreadRequest::Type) req) {
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case ThreadRequest::Start:
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timeout = max (5, (int) Config->get_feedback_interval_ms());
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active_thread++;
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break;
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case ThreadRequest::Stop:
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timeout = -1;
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if (active_thread) {
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active_thread--;
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}
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break;
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case ThreadRequest::Quit:
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pthread_exit_pbd (0);
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/*NOTREACHED*/
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break;
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default:
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break;
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}
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} else if (nread == 0) {
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break;
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} else if (errno == EAGAIN) {
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break;
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} else {
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fatal << string_compose (_("Error reading from thread request pipe for protocol \"%1\""), _name) << endmsg;
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/*NOTREACHED*/
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}
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}
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}
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if (!active_thread) {
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continue;
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}
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cerr << ".\n";
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if (send()) {
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list<Route*> routes = session.get_routes(); /* copies the routes */
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if (send_route_feedback ()) {
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send_route_feedback (routes);
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}
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send_global_feedback ();
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}
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}
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return 0;
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}
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211
libs/ardour/control_protocol_manager.cc
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211
libs/ardour/control_protocol_manager.cc
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#include <dlfcn.h>
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#include <pbd/compose.h>
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#include <pbd/error.h>
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#include <pbd/pathscanner.h>
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#include <ardour/control_protocol.h>
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#include <ardour/control_protocol_manager.h>
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using namespace ARDOUR;
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using namespace PBD;
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using namespace std;
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#include "i18n.h"
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ControlProtocolManager* ControlProtocolManager::_instance = 0;
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ControlProtocolManager::ControlProtocolManager ()
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{
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if (_instance == 0) {
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_instance = this;
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}
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}
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ControlProtocolManager::~ControlProtocolManager()
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{
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}
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void
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ControlProtocolManager::startup (Session& s)
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{
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list<ControlProtocolInfo *>::iterator i;
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for (i = control_protocol_info.begin(); i != control_protocol_info.end(); ++i) {
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ControlProtocolInfo* cpi = (*i);
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if (cpi->name == "Tranzport") {
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cpi->descriptor = get_descriptor ((*i)->path);
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if (cpi->descriptor == 0) {
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error << string_compose (_("control protocol name \"%1\" has no descriptor"), cpi->name) << endmsg;
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continue;
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}
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if ((cpi->protocol = cpi->descriptor->initialize (cpi->descriptor, &s)) == 0) {
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error << string_compose (_("control protocol name \"%1\" could not be initialized"), cpi->name) << endmsg;
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continue;
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}
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{
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LockMonitor lm (protocols_lock, __LINE__, __FILE__);
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control_protocols.push_back (cpi->protocol);
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}
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cerr << "start " << cpi->name << endl;
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cpi->protocol->init ();
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cerr << "activate " << cpi->name << endl;
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cpi->protocol->set_active (true);
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cerr << cpi->name << " now running\n";
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}
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}
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}
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ControlProtocol*
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ControlProtocolManager::instantiate (Session& session, string name)
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{
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list<ControlProtocolInfo *>::iterator i;
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for (i = control_protocol_info.begin(); i != control_protocol_info.end(); ++i) {
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if ((*i)->name == name) {
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break;
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}
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}
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if (i == control_protocol_info.end()) {
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error << string_compose (_("control protocol name \"%1\" is unknown"), name) << endmsg;
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return 0;
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}
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ControlProtocolInfo* cpi = (*i);
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cpi->descriptor = get_descriptor ((*i)->path);
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if (cpi->descriptor == 0) {
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error << string_compose (_("control protocol name \"%1\" has no descriptor"), name) << endmsg;
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return 0;
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}
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if ((cpi->protocol = cpi->descriptor->initialize (cpi->descriptor, &session)) == 0) {
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error << string_compose (_("control protocol name \"%1\" could not be initialized"), name) << endmsg;
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return 0;
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}
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LockMonitor lm (protocols_lock, __LINE__, __FILE__);
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control_protocols.push_back (cpi->protocol);
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return cpi->protocol;
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}
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int
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ControlProtocolManager::teardown (string name)
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{
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for (list<ControlProtocolInfo*>::iterator i = control_protocol_info.begin(); i != control_protocol_info.end(); ++i) {
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ControlProtocolInfo* cpi = *i;
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if (cpi->name == name && cpi->descriptor && cpi->protocol) {
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cpi->descriptor->destroy (cpi->descriptor, cpi->protocol);
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{
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LockMonitor lm (protocols_lock, __LINE__, __FILE__);
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list<ControlProtocol*>::iterator p = find (control_protocols.begin(), control_protocols.end(), cpi->protocol);
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if (p != control_protocols.end()) {
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control_protocols.erase (p);
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}
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}
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cpi->protocol = 0;
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return 0;
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}
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}
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return -1;
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}
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static bool protocol_filter (const string& str, void *arg)
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{
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/* Not a dotfile, has a prefix before a period, suffix is "so" */
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return str[0] != '.' && (str.length() > 3 && str.find (".so") == (str.length() - 3));
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}
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void
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ControlProtocolManager::discover_control_protocols (string path)
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{
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vector<string *> *found;
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PathScanner scanner;
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cerr << "CP Manager looking for surfaces\n";
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found = scanner (path, protocol_filter, 0, false, true);
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for (vector<string*>::iterator i = found->begin(); i != found->end(); ++i) {
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cerr << "CP Manager looking at " << **i << endl;
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control_protocol_discover (**i);
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delete *i;
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}
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delete found;
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}
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int
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ControlProtocolManager::control_protocol_discover (string path)
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{
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ControlProtocolDescriptor* descriptor;
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if ((descriptor = get_descriptor (path)) != 0) {
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ControlProtocolInfo* info = new ControlProtocolInfo ();
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info->descriptor = descriptor;
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info->name = descriptor->name;
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info->path = path;
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control_protocol_info.push_back (info);
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cerr << "Found \"" << info->name << "\"\n";
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dlclose (descriptor->module);
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} else {
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cerr << "no descriptor\n";
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}
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return 0;
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}
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ControlProtocolDescriptor*
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ControlProtocolManager::get_descriptor (string path)
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{
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void *module;
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ControlProtocolDescriptor *descriptor = 0;
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ControlProtocolDescriptor* (*dfunc)(void);
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const char *errstr;
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if ((module = dlopen (path.c_str(), RTLD_NOW)) == 0) {
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error << string_compose(_("ControlProtocolManager: cannot load module \"%1\" (%2)"), path, dlerror()) << endmsg;
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return 0;
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}
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dfunc = (ControlProtocolDescriptor* (*)(void)) dlsym (module, "protocol_descriptor");
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if ((errstr = dlerror()) != 0) {
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error << string_compose(_("ControlProtocolManager: module \"%1\" has no descriptor function."), path) << endmsg;
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error << errstr << endmsg;
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dlclose (module);
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return 0;
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}
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descriptor = dfunc();
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if (descriptor) {
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descriptor->module = module;
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} else {
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dlclose (module);
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}
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return descriptor;
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}
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