2 * This file is part of Disobedience
3 * Copyright (C) 2007-2010 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 /** @file disobedience/rtp.c
19 * @brief RTP player support for Disobedience
22 #include "disobedience.h"
23 #include <sys/types.h>
28 #include <sys/utsname.h>
31 /** @brief Path to RTP player's control socket */
32 static char *rtp_socket;
34 /** @brief Path to RTP player's logfile */
37 /** @brief Initialize @ref rtp_socket and @ref rtp_log if necessary */
38 static void rtp_init(void) {
40 const char *home = getenv("HOME");
44 byte_xasprintf(&dir, "%s/.disorder/", home);
47 byte_xasprintf(&base, "%s/", dir);
49 byte_xasprintf(&base, "%s/%s-", dir, uts.nodename);
50 byte_xasprintf(&rtp_socket, "%srtp", base);
51 byte_xasprintf(&rtp_log, "%srtp.log", base);
55 /** @brief Return a connection to the RTP player's control socket */
56 static FILE *rtp_connect(void) {
57 struct sockaddr_un un;
62 memset(&un, 0, sizeof un);
63 un.sun_family = AF_UNIX;
64 strcpy(un.sun_path, rtp_socket);
65 fd = xsocket(PF_UNIX, SOCK_STREAM, 0);
66 if(connect(fd, (const struct sockaddr *)&un, sizeof un) < 0) {
67 /* Connection refused just means that the player quit without deleting its
74 /* Anything else may be a problem */
75 fpopup_msg(GTK_MESSAGE_ERROR, "connecting to %s: %s",
76 rtp_socket, strerror(errno));
82 if(!(fp = fdopen(fd, "r+"))) {
83 fpopup_msg(GTK_MESSAGE_ERROR, "error calling fdopen: %s", strerror(errno));
90 /** @brief Return non-0 iff the RTP player is running */
91 int rtp_running(void) {
92 FILE *fp = rtp_connect();
95 return 0; /* no connection -> not running */
96 fclose(fp); /* connection -> running */
100 int rtp_getvol(int *l, int *r) {
104 fp = rtp_connect(); if(!fp) goto end;
105 fprintf(fp, "getvol\n"); fflush(fp);
106 if(fscanf(fp, "%d %d\n", l, r) != 2) goto end;
113 int rtp_setvol(int *l, int *r) {
114 FILE *fp = rtp_connect(); if(!fp) return -1;
115 fprintf(fp, "setvol %d %d\n", *l, *r); fflush(fp);
116 if(fscanf(fp, "%d %d\n", l, r) != 2) { /* do nothing */ }
121 /** @brief Activate the RTP player if it is not running */
122 void start_rtp(void) {
127 return; /* already running */
128 /* double-fork so we don't have to wait() later */
129 if(!(pid = xfork())) {
131 disorder_fatal(errno, "error calling setsid");
135 /* log errors and output somewhere reasonably sane. rtp_running()
136 * will have made sure the directory exists. */
137 if((fd = open(rtp_log, O_WRONLY|O_CREAT|O_TRUNC, 0600)) < 0)
138 disorder_fatal(errno, "creating %s", rtp_log);
141 disorder_fatal(errno, "dup2");
143 disorder_fatal(errno, "close");
144 /* We don't want to hang onto whatever stdin was */
145 if((fd = open("/dev/null", O_RDONLY)) < 0)
146 disorder_fatal(errno, "opening /dev/null");
148 disorder_fatal(errno, "dup2");
150 disorder_fatal(errno, "close");
151 /* execute the player */
152 execlp("disorder-playrtp",
154 "--socket", rtp_socket,
157 disorder_fatal(errno, "disorder-playrtp");
164 while(waitpid(pid, &w, 0) < 0 && errno == EINTR)
169 /** @brief Stop the RTP player if it is running */
170 void stop_rtp(void) {
171 FILE *fp = rtp_connect();
174 return; /* already stopped */
175 fprintf(fp, "stop\n");
179 static char *rtp_config_file(void) {
180 static char *rtp_config;
181 const char *home = getenv("HOME");
183 byte_xasprintf(&rtp_config, "%s/.disorder/api", home);
189 void load_rtp_config(void) {
190 char *rtp_config = rtp_config_file();
192 if((fp = fopen(rtp_config, "r"))) {
194 if(inputline(rtp_config, fp, &line, '\n') == 0) {
195 for(int n = 0; uaudio_apis[n]; ++n)
196 if(!strcmp(uaudio_apis[n]->name, line))
202 rtp_api = uaudio_default(uaudio_apis, UAUDIO_API_CLIENT)->name;
205 void save_rtp_config(void) {
207 char *rtp_config = rtp_config_file();
209 byte_xasprintf(&tmp, "%s.tmp", rtp_config);
211 if(!(fp = fopen(tmp, "w"))){
212 fpopup_msg(GTK_MESSAGE_ERROR, "error opening %s: %s",
213 tmp, strerror(errno));
216 if(fprintf(fp, "%s\n", rtp_api) < 0) {
217 fpopup_msg(GTK_MESSAGE_ERROR, "error writing to %s: %s",
218 tmp, strerror(errno));
223 fpopup_msg(GTK_MESSAGE_ERROR, "error closing %s: %s",
224 tmp, strerror(errno));
227 if(rename(tmp, rtp_config) < 0) {
228 fpopup_msg(GTK_MESSAGE_ERROR, "error renaming %s: %s",
229 tmp, strerror(errno));
234 void change_rtp_api(const char *api) {
235 if(rtp_api && !strcmp(api, rtp_api))
236 return; /* no change */
237 int running = rtp_running();
242 // TODO this is racy and does not work; the player doesn't shut down quickly