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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 48375 $")
00031
00032 #include <string.h>
00033 #include <stdio.h>
00034 #include <signal.h>
00035 #include <stdlib.h>
00036 #include <unistd.h>
00037 #include <fcntl.h>
00038 #include <sys/time.h>
00039 #include <errno.h>
00040
00041 #include "asterisk/lock.h"
00042 #include "asterisk/file.h"
00043 #include "asterisk/logger.h"
00044 #include "asterisk/channel.h"
00045 #include "asterisk/frame.h"
00046 #include "asterisk/pbx.h"
00047 #include "asterisk/module.h"
00048 #include "asterisk/translate.h"
00049 #include "asterisk/options.h"
00050
00051 #define ICES "/usr/bin/ices"
00052 #define LOCAL_ICES "/usr/local/bin/ices"
00053
00054 static char *app = "ICES";
00055
00056 static char *synopsis = "Encode and stream using 'ices'";
00057
00058 static char *descrip =
00059 " ICES(config.xml) Streams to an icecast server using ices\n"
00060 "(available separately). A configuration file must be supplied\n"
00061 "for ices (see examples/asterisk-ices.conf). \n";
00062
00063
00064 static int icesencode(char *filename, int fd)
00065 {
00066 int res;
00067 int x;
00068 sigset_t fullset, oldset;
00069
00070 sigfillset(&fullset);
00071 pthread_sigmask(SIG_BLOCK, &fullset, &oldset);
00072
00073 res = fork();
00074 if (res < 0)
00075 ast_log(LOG_WARNING, "Fork failed\n");
00076 if (res) {
00077 pthread_sigmask(SIG_SETMASK, &oldset, NULL);
00078 return res;
00079 }
00080
00081
00082 signal(SIGPIPE, SIG_DFL);
00083 pthread_sigmask(SIG_UNBLOCK, &fullset, NULL);
00084
00085 if (ast_opt_high_priority)
00086 ast_set_priority(0);
00087 dup2(fd, STDIN_FILENO);
00088 for (x=STDERR_FILENO + 1;x<1024;x++) {
00089 if ((x != STDIN_FILENO) && (x != STDOUT_FILENO))
00090 close(x);
00091 }
00092
00093 execl(ICES, "ices", filename, (char *)NULL);
00094
00095 execl(LOCAL_ICES, "ices", filename, (char *)NULL);
00096
00097 execlp("ices", "ices", filename, (char *)NULL);
00098 ast_log(LOG_WARNING, "Execute of ices failed\n");
00099 _exit(0);
00100 }
00101
00102 static int ices_exec(struct ast_channel *chan, void *data)
00103 {
00104 int res=0;
00105 struct ast_module_user *u;
00106 int fds[2];
00107 int ms = -1;
00108 int pid = -1;
00109 int flags;
00110 int oreadformat;
00111 struct timeval last;
00112 struct ast_frame *f;
00113 char filename[256]="";
00114 char *c;
00115
00116 if (ast_strlen_zero(data)) {
00117 ast_log(LOG_WARNING, "ICES requires an argument (configfile.xml)\n");
00118 return -1;
00119 }
00120
00121 u = ast_module_user_add(chan);
00122
00123 last = ast_tv(0, 0);
00124
00125 if (pipe(fds)) {
00126 ast_log(LOG_WARNING, "Unable to create pipe\n");
00127 ast_module_user_remove(u);
00128 return -1;
00129 }
00130 flags = fcntl(fds[1], F_GETFL);
00131 fcntl(fds[1], F_SETFL, flags | O_NONBLOCK);
00132
00133 ast_stopstream(chan);
00134
00135 if (chan->_state != AST_STATE_UP)
00136 res = ast_answer(chan);
00137
00138 if (res) {
00139 close(fds[0]);
00140 close(fds[1]);
00141 ast_log(LOG_WARNING, "Answer failed!\n");
00142 ast_module_user_remove(u);
00143 return -1;
00144 }
00145
00146 oreadformat = chan->readformat;
00147 res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
00148 if (res < 0) {
00149 close(fds[0]);
00150 close(fds[1]);
00151 ast_log(LOG_WARNING, "Unable to set write format to signed linear\n");
00152 ast_module_user_remove(u);
00153 return -1;
00154 }
00155 if (((char *)data)[0] == '/')
00156 ast_copy_string(filename, (char *) data, sizeof(filename));
00157 else
00158 snprintf(filename, sizeof(filename), "%s/%s", (char *)ast_config_AST_CONFIG_DIR, (char *)data);
00159
00160 c = strchr(filename, '|');
00161 if (c)
00162 *c = '\0';
00163 res = icesencode(filename, fds[0]);
00164 close(fds[0]);
00165 if (res >= 0) {
00166 pid = res;
00167 for (;;) {
00168
00169 ms = ast_waitfor(chan, -1);
00170 if (ms < 0) {
00171 ast_log(LOG_DEBUG, "Hangup detected\n");
00172 res = -1;
00173 break;
00174 }
00175 f = ast_read(chan);
00176 if (!f) {
00177 ast_log(LOG_DEBUG, "Null frame == hangup() detected\n");
00178 res = -1;
00179 break;
00180 }
00181 if (f->frametype == AST_FRAME_VOICE) {
00182 res = write(fds[1], f->data, f->datalen);
00183 if (res < 0) {
00184 if (errno != EAGAIN) {
00185 ast_log(LOG_WARNING, "Write failed to pipe: %s\n", strerror(errno));
00186 res = -1;
00187 ast_frfree(f);
00188 break;
00189 }
00190 }
00191 }
00192 ast_frfree(f);
00193 }
00194 }
00195 close(fds[1]);
00196
00197 if (pid > -1)
00198 kill(pid, SIGKILL);
00199 if (!res && oreadformat)
00200 ast_set_read_format(chan, oreadformat);
00201
00202 ast_module_user_remove(u);
00203
00204 return res;
00205 }
00206
00207 static int unload_module(void)
00208 {
00209 int res;
00210
00211 res = ast_unregister_application(app);
00212
00213 ast_module_user_hangup_all();
00214
00215 return res;
00216 }
00217
00218 static int load_module(void)
00219 {
00220 return ast_register_application(app, ices_exec, synopsis, descrip);
00221 }
00222
00223 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Encode and Stream via icecast and ices");