177 lines
6.0 KiB
C++
177 lines
6.0 KiB
C++
/*
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Copyright (C) 2017 Timo Wischer
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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 Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <fstream>
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#include "JackInternalSessionLoader.h"
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#include "JackLockedEngine.h"
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namespace Jack
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{
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JackInternalSessionLoader::JackInternalSessionLoader(JackServer* const server) :
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fServer(server)
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{
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}
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int JackInternalSessionLoader::Load(const char* file)
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{
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std::ifstream infile(file);
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if (!infile.is_open()) {
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jack_error("JACK internal session file %s does not exist or cannot be opened for reading.", file);
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return -1;
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}
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std::string line;
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int linenr = -1;
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while (std::getline(infile, line))
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{
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linenr++;
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std::istringstream iss(line);
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std::string command;
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if ( !(iss >> command) ) {
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/* ignoring empty line or line only filled with spaces */
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continue;
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}
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/* convert command to lower case to accept any case of the letters in the command */
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std::transform(command.begin(), command.end(), command.begin(), ::tolower);
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if ( (command.compare("c") == 0) || (command.compare("con") == 0) ) {
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ConnectPorts(iss, linenr);
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} else if ( (command.compare("l") == 0) || (command.compare("load") == 0) ) {
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LoadClient(iss, linenr);
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#if 0
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/* NOTE: c++11 only */
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} else if (command.front() == '#') {
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#else
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} else if (command[0] == '#') {
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#endif
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/* ignoring commented lines.
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* The # can be followed by non spaces.
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* Therefore only compare the first letter of the command.
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*/
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} else {
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jack_error("JACK internal session file %s line %u contains unknown command '%s'. Ignoring the line!", file, linenr, line.c_str());
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}
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}
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return 0;
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}
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void JackInternalSessionLoader::LoadClient(std::istringstream& iss, const int linenr)
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{
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std::string client_name;
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if ( !(iss >> client_name) ) {
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jack_error("Cannot read client name from internal session file line %u '%s'. Ignoring the line!", linenr, iss.str().c_str());
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return;
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}
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std::string lib_name;
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if ( !(iss >> lib_name) ) {
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jack_error("Cannot read client library name from internal session file line %u '%s'. Ignoring the line!", linenr, iss.str().c_str());
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return;
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}
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/* get the rest of the line */
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std::string parameters;
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if ( std::getline(iss, parameters) ) {
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/* remove the leading spaces */
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const std::size_t start = parameters.find_first_not_of(" \t");
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if (start == std::string::npos) {
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/* Parameters containing only spaces.
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* Use empty parameter string.
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*/
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parameters = "";
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} else {
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parameters = parameters.substr(start);
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}
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}
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/* jackctl_server_load_internal() can not be used
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* because it calls jack_internal_initialize()
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* instead of jack_initialize()
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*/
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int status = 0;
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int refnum = 0;
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if (fServer->InternalClientLoad1(client_name.c_str(), lib_name.c_str(), parameters.c_str(), (JackLoadName|JackUseExactName|JackLoadInit), &refnum, -1, &status) < 0) {
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/* Due to the JackUseExactName option JackNameNotUnique will always handled as a failure.
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* See JackEngine::ClientCheck().
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*/
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if (status & JackNameNotUnique) {
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jack_error("Internal client name `%s' not unique", client_name.c_str());
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}
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/* An error message for JackVersionError will already
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* be printed by JackInternalClient::Open().
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* Therefore no need to handle it here.
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*/
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jack_error("Cannot load client %s from internal session file line %u. Ignoring the line!", client_name.c_str(), linenr);
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return;
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}
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/* status has not to be checked for JackFailure
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* because JackServer::InternalClientLoad1() will return a value < 0
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* and this is handled by the previouse if-clause.
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*/
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jack_info("Internal client %s successfully loaded", client_name.c_str());
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}
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void JackInternalSessionLoader::ConnectPorts(std::istringstream& iss, const int linenr)
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{
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std::string src_port;
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if ( !(iss >> src_port) ) {
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jack_error("Cannot read first port from internal session file line %u '%s'. Ignoring the line!",
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linenr, iss.str().c_str());
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return;
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}
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std::string dst_port;
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if ( !(iss >> dst_port) ) {
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jack_error("Cannot read second port from internal session file line %u '%s'. Ignoring the line!",
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linenr, iss.str().c_str());
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return;
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}
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/* use the client reference of the source port */
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const jack_port_id_t src_port_index = fServer->GetGraphManager()->GetPort(src_port.c_str());
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if (src_port_index >= NO_PORT) {
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jack_error("Source port %s does not exist! Ignoring internal session file line %u '%s'.",
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src_port.c_str(), linenr, iss.str().c_str());
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return;
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}
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const int src_refnum = fServer->GetGraphManager()->GetOutputRefNum(src_port_index);
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if (fServer->GetEngine()->PortConnect(src_refnum, src_port.c_str(), dst_port.c_str()) < 0) {
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jack_error("Cannot connect ports of internal session file line %u '%s'.\n"
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"Possibly the destination port does not exist. Ignoring the line!",
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linenr, iss.str().c_str());
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return;
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}
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jack_info("Ports connected: %s -> %s", src_port.c_str(), dst_port.c_str());
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}
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}
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