Applications no longer need to call ast_module_user_add and ast_module_user_remove...
[asterisk/asterisk.git] / apps / app_ices.c
1 /*
2  * Asterisk -- An open source telephony toolkit.
3  *
4  * Copyright (C) 1999 - 2005, Digium, Inc.
5  *
6  * Mark Spencer <markster@digium.com>
7  *
8  * See http://www.asterisk.org for more information about
9  * the Asterisk project. Please do not directly contact
10  * any of the maintainers of this project for assistance;
11  * the project provides a web site, mailing lists and IRC
12  * channels for your use.
13  *
14  * This program is free software, distributed under the terms of
15  * the GNU General Public License Version 2. See the LICENSE file
16  * at the top of the source tree.
17  */
18
19 /*! \file
20  *
21  * \brief Stream to an icecast server via ICES (see contrib/asterisk-ices.xml)
22  *
23  * \author Mark Spencer <markster@digium.com>
24  * 
25  * \extref ICES - http://www.icecast.org/ices.php
26  *
27  * \ingroup applications
28  */
29  
30 #include "asterisk.h"
31
32 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
33
34 #include <string.h>
35 #include <stdio.h>
36 #include <signal.h>
37 #include <stdlib.h>
38 #include <unistd.h>
39 #include <fcntl.h>
40 #include <sys/time.h>
41 #include <errno.h>
42
43 #include "asterisk/lock.h"
44 #include "asterisk/file.h"
45 #include "asterisk/logger.h"
46 #include "asterisk/channel.h"
47 #include "asterisk/frame.h"
48 #include "asterisk/pbx.h"
49 #include "asterisk/module.h"
50 #include "asterisk/translate.h"
51 #include "asterisk/options.h"
52
53 #define ICES "/usr/bin/ices"
54 #define LOCAL_ICES "/usr/local/bin/ices"
55
56 static char *app = "ICES";
57
58 static char *synopsis = "Encode and stream using 'ices'";
59
60 static char *descrip = 
61 "  ICES(config.xml) Streams to an icecast server using ices\n"
62 "(available separately).  A configuration file must be supplied\n"
63 "for ices (see examples/asterisk-ices.conf). \n";
64
65
66 static int icesencode(char *filename, int fd)
67 {
68         int res;
69         int x;
70         sigset_t fullset, oldset;
71
72         sigfillset(&fullset);
73         pthread_sigmask(SIG_BLOCK, &fullset, &oldset);
74
75         res = fork();
76         if (res < 0) 
77                 ast_log(LOG_WARNING, "Fork failed\n");
78         if (res) {
79                 pthread_sigmask(SIG_SETMASK, &oldset, NULL);
80                 return res;
81         }
82
83         /* Stop ignoring PIPE */
84         signal(SIGPIPE, SIG_DFL);
85         pthread_sigmask(SIG_UNBLOCK, &fullset, NULL);
86
87         if (ast_opt_high_priority)
88                 ast_set_priority(0);
89         dup2(fd, STDIN_FILENO);
90         for (x=STDERR_FILENO + 1;x<1024;x++) {
91                 if ((x != STDIN_FILENO) && (x != STDOUT_FILENO))
92                         close(x);
93         }
94         /* Most commonly installed in /usr/local/bin */
95         execl(ICES, "ices", filename, (char *)NULL);
96         /* But many places has it in /usr/bin */
97         execl(LOCAL_ICES, "ices", filename, (char *)NULL);
98         /* As a last-ditch effort, try to use PATH */
99         execlp("ices", "ices", filename, (char *)NULL);
100         ast_log(LOG_WARNING, "Execute of ices failed\n");
101         _exit(0);
102 }
103
104 static int ices_exec(struct ast_channel *chan, void *data)
105 {
106         int res = 0;
107         int fds[2];
108         int ms = -1;
109         int pid = -1;
110         int flags;
111         int oreadformat;
112         struct timeval last;
113         struct ast_frame *f;
114         char filename[256]="";
115         char *c;
116
117         if (ast_strlen_zero(data)) {
118                 ast_log(LOG_WARNING, "ICES requires an argument (configfile.xml)\n");
119                 return -1;
120         }
121         
122         last = ast_tv(0, 0);
123         
124         if (pipe(fds)) {
125                 ast_log(LOG_WARNING, "Unable to create pipe\n");
126                 return -1;
127         }
128         flags = fcntl(fds[1], F_GETFL);
129         fcntl(fds[1], F_SETFL, flags | O_NONBLOCK);
130         
131         ast_stopstream(chan);
132
133         if (chan->_state != AST_STATE_UP)
134                 res = ast_answer(chan);
135                 
136         if (res) {
137                 close(fds[0]);
138                 close(fds[1]);
139                 ast_log(LOG_WARNING, "Answer failed!\n");
140                 return -1;
141         }
142
143         oreadformat = chan->readformat;
144         res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
145         if (res < 0) {
146                 close(fds[0]);
147                 close(fds[1]);
148                 ast_log(LOG_WARNING, "Unable to set write format to signed linear\n");
149                 return -1;
150         }
151         if (((char *)data)[0] == '/')
152                 ast_copy_string(filename, (char *) data, sizeof(filename));
153         else
154                 snprintf(filename, sizeof(filename), "%s/%s", (char *)ast_config_AST_CONFIG_DIR, (char *)data);
155         /* Placeholder for options */           
156         c = strchr(filename, '|');
157         if (c)
158                 *c = '\0';      
159         res = icesencode(filename, fds[0]);
160         close(fds[0]);
161         if (res >= 0) {
162                 pid = res;
163                 for (;;) {
164                         /* Wait for audio, and stream */
165                         ms = ast_waitfor(chan, -1);
166                         if (ms < 0) {
167                                 ast_debug(1, "Hangup detected\n");
168                                 res = -1;
169                                 break;
170                         }
171                         f = ast_read(chan);
172                         if (!f) {
173                                 ast_debug(1, "Null frame == hangup() detected\n");
174                                 res = -1;
175                                 break;
176                         }
177                         if (f->frametype == AST_FRAME_VOICE) {
178                                 res = write(fds[1], f->data, f->datalen);
179                                 if (res < 0) {
180                                         if (errno != EAGAIN) {
181                                                 ast_log(LOG_WARNING, "Write failed to pipe: %s\n", strerror(errno));
182                                                 res = -1;
183                                                 ast_frfree(f);
184                                                 break;
185                                         }
186                                 }
187                         }
188                         ast_frfree(f);
189                 }
190         }
191         close(fds[1]);
192         
193         if (pid > -1)
194                 kill(pid, SIGKILL);
195         if (!res && oreadformat)
196                 ast_set_read_format(chan, oreadformat);
197
198         return res;
199 }
200
201 static int unload_module(void)
202 {
203         return ast_unregister_application(app);
204 }
205
206 static int load_module(void)
207 {
208         return ast_register_application(app, ices_exec, synopsis, descrip);
209 }
210
211 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Encode and Stream via icecast and ices");