Jack2 1.9.12

JackInternalSessionLoader.cpp
1 /*
2 Copyright (C) 2017 Timo Wischer
3
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU Lesser General Public License as published by
6 the Free Software Foundation; either version 2.1 of the License, or
7 (at your option) any later version.
8
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
17
18 */
19
20 #include <fstream>
21 #include "JackInternalSessionLoader.h"
22 #include "JackLockedEngine.h"
23
24
25 namespace Jack
26 {
27
28 JackInternalSessionLoader::JackInternalSessionLoader(JackServer* const server) :
29 fServer(server)
30 {
31 }
32
33 int JackInternalSessionLoader::Load(const char* file)
34 {
35 std::ifstream infile(file);
36
37 if (!infile.is_open()) {
38 jack_error("JACK internal session file %s does not exist or cannot be opened for reading.", file);
39 return -1;
40 }
41
42 std::string line;
43 int linenr = -1;
44 while (std::getline(infile, line))
45 {
46 linenr++;
47
48 std::istringstream iss(line);
49
50 std::string command;
51 if ( !(iss >> command) ) {
52 /* ignoring empty line or line only filled with spaces */
53 continue;
54 }
55
56 /* convert command to lower case to accept any case of the letters in the command */
57 std::transform(command.begin(), command.end(), command.begin(), ::tolower);
58
59 if ( (command.compare("c") == 0) || (command.compare("con") == 0) ) {
60 ConnectPorts(iss, linenr);
61 } else if ( (command.compare("l") == 0) || (command.compare("load") == 0) ) {
62 LoadClient(iss, linenr);
63 #if 0
64 /* NOTE: c++11 only */
65 } else if (command.front() == '#') {
66 #else
67 } else if (command[0] == '#') {
68 #endif
69 /* ignoring commented lines.
70 * The # can be followed by non spaces.
71 * Therefore only compare the first letter of the command.
72 */
73 } else {
74 jack_error("JACK internal session file %s line %u contains unkown command '%s'. Ignoring the line!", file, linenr, line.c_str());
75 }
76 }
77
78 return 0;
79 }
80
81 void JackInternalSessionLoader::LoadClient(std::istringstream& iss, const int linenr)
82 {
83 std::string client_name;
84 if ( !(iss >> client_name) ) {
85 jack_error("Cannot read client name from internal session file line %u '%s'. Ignoring the line!", linenr, iss.str().c_str());
86 return;
87 }
88
89 std::string lib_name;
90 if ( !(iss >> lib_name) ) {
91 jack_error("Cannot read client library name from internal session file line %u '%s'. Ignoring the line!", linenr, iss.str().c_str());
92 return;
93 }
94
95 /* get the rest of the line */
96 std::string parameters;
97 if ( std::getline(iss, parameters) ) {
98 /* remove the leading spaces */
99 const std::size_t start = parameters.find_first_not_of(" \t");
100 if (start == std::string::npos) {
101 /* Parameters containing only spaces.
102 * Use empty parameter string.
103 */
104 parameters = "";
105 } else {
106 parameters = parameters.substr(start);
107 }
108 }
109
110
111 /* jackctl_server_load_internal() can not be used
112 * because it calls jack_internal_initialize()
113 * instead of jack_initialize()
114 */
115 int status = 0;
116 int refnum = 0;
117 if (fServer->InternalClientLoad1(client_name.c_str(), lib_name.c_str(), parameters.c_str(), (JackLoadName|JackUseExactName|JackLoadInit), &refnum, -1, &status) < 0) {
118 /* Due to the JackUseExactName option JackNameNotUnique will always handled as a failure.
119 * See JackEngine::ClientCheck().
120 */
121 if (status & JackNameNotUnique) {
122 jack_error("Internal client name `%s' not unique", client_name.c_str());
123 }
124 /* An error message for JackVersionError will already
125 * be printed by JackInternalClient::Open().
126 * Therefore no need to handle it here.
127 */
128
129 jack_error("Cannot load client %s from internal session file line %u. Ignoring the line!", client_name.c_str(), linenr);
130 return;
131 }
132
133 /* status has not to be checked for JackFailure
134 * because JackServer::InternalClientLoad1() will return a value < 0
135 * and this is handled by the previouse if-clause.
136 */
137
138 jack_info("Internal client %s successfully loaded", client_name.c_str());
139 }
140
141 void JackInternalSessionLoader::ConnectPorts(std::istringstream& iss, const int linenr)
142 {
143 std::string src_port;
144 if ( !(iss >> src_port) ) {
145 jack_error("Cannot read first port from internal session file line %u '%s'. Ignoring the line!",
146 linenr, iss.str().c_str());
147 return;
148 }
149
150 std::string dst_port;
151 if ( !(iss >> dst_port) ) {
152 jack_error("Cannot read second port from internal session file line %u '%s'. Ignoring the line!",
153 linenr, iss.str().c_str());
154 return;
155 }
156
157 /* use the client reference of the source port */
158 const jack_port_id_t src_port_index = fServer->GetGraphManager()->GetPort(src_port.c_str());
159 if (src_port_index >= NO_PORT) {
160 jack_error("Source port %s does not exist! Ignoring internal session file line %u '%s'.",
161 src_port.c_str(), linenr, iss.str().c_str());
162 return;
163 }
164 const int src_refnum = fServer->GetGraphManager()->GetOutputRefNum(src_port_index);
165
166 if (fServer->GetEngine()->PortConnect(src_refnum, src_port.c_str(), dst_port.c_str()) < 0) {
167 jack_error("Cannot connect ports of internal session file line %u '%s'.\n"
168 "Possibly the destination port does not exist. Ignoring the line!",
169 linenr, iss.str().c_str());
170 return;
171 }
172
173 jack_info("Ports connected: %s -> %s", src_port.c_str(), dst_port.c_str());
174 }
175
176 }
jack_error
SERVER_EXPORT void jack_error(const char *fmt,...)
Definition: JackError.cpp:92
jack_info
SERVER_EXPORT void jack_info(const char *fmt,...)
Definition: JackError.cpp:100