Add Icecast streaming support

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2185 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_ices.c

@@ -0,0 +1,197 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Stream to an icecast server via ICES (see contrib/asterisk-ices.xml)
+ * 
+ * Copyright (C) 1999, Mark Spencer
+ *
+ * Mark Spencer <markster@linux-support.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+ 
+#include <asterisk/lock.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/channel.h>
+#include <asterisk/frame.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+#include <asterisk/translate.h>
+#include <string.h>
+#include <stdio.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <sys/time.h>
+#include <errno.h>
+#include "../astconf.h"
+
+#define ICES "/usr/bin/ices"
+#define LOCAL_ICES "/usr/local/bin/ices"
+
+static char *tdesc = "Encode and Stream via icecast and ices";
+
+static char *app = "ICES";
+
+static char *synopsis = "Encode and stream using 'ices'";
+
+static char *descrip = 
+"  ICES(config.xml) Streams to an icecast server using ices\n"
+"(available separately).  A configuration file must be supplied\n"
+"for ices (see examples/asterisk-ices.conf).  Returns  -1  on\n"
+"hangup or 0 otherwise.\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int icesencode(char *filename, int fd)
+{
+	int res;
+	int x;
+	res = fork();
+	if (res < 0) 
+		ast_log(LOG_WARNING, "Fork failed\n");
+	if (res)
+		return res;
+	dup2(fd, STDIN_FILENO);
+	for (x=STDERR_FILENO + 1;x<256;x++) {
+		if ((x != STDIN_FILENO) && (x != STDOUT_FILENO))
+			close(x);
+	}
+	/* Most commonly installed in /usr/local/bin */
+	execl(ICES, "ices", filename, (char *)NULL);
+	/* But many places has it in /usr/bin */
+	execl(LOCAL_ICES, "ices", filename, (char *)NULL);
+	/* As a last-ditch effort, try to use PATH */
+	execlp("ices", "ices", filename, (char *)NULL);
+	ast_log(LOG_WARNING, "Execute of ices failed\n");
+	return -1;
+}
+
+static int ices_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	struct localuser *u;
+	int fds[2];
+	int ms = -1;
+	int pid = -1;
+	int flags;
+	int oreadformat;
+	struct timeval last;
+	struct ast_frame *f;
+	char filename[256]="";
+	char *c;
+	last.tv_usec = 0;
+	last.tv_sec = 0;
+	if (!data || !strlen(data)) {
+		ast_log(LOG_WARNING, "ICES requires an argument (configfile.xml)\n");
+		return -1;
+	}
+	if (pipe(fds)) {
+		ast_log(LOG_WARNING, "Unable to create pipe\n");
+		return -1;
+	}
+	flags = fcntl(fds[1], F_GETFL);
+	fcntl(fds[1], F_SETFL, flags | O_NONBLOCK);
+	
+	LOCAL_USER_ADD(u);
+	ast_stopstream(chan);
+
+	if (chan->_state != AST_STATE_UP)
+		res = ast_answer(chan);
+		
+	if (res) {
+		close(fds[0]);
+		close(fds[1]);
+		ast_log(LOG_WARNING, "Answer failed!\n");
+		return -1;
+	}
+
+	oreadformat = chan->readformat;
+	res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
+	if (res < 0) {
+		close(fds[0]);
+		close(fds[1]);
+		ast_log(LOG_WARNING, "Unable to set write format to signed linear\n");
+		return -1;
+	}
+	if (((char *)data)[0] == '/')
+		strncpy(filename, (char *)data, sizeof(filename) - 1);
+	else
+		snprintf(filename, sizeof(filename), "%s/%s", (char *)ast_config_AST_CONFIG_DIR, (char *)data);
+	/* Placeholder for options */		
+	c = strchr(filename, '|');
+	if (c)
+		*c = '\0';	
+	res = icesencode(filename, fds[0]);
+	close(fds[0]);
+	if (res >= 0) {
+		pid = res;
+		for (;;) {
+			/* Wait for audio, and stream */
+			ms = ast_waitfor(chan, -1);
+			if (ms < 0) {
+				ast_log(LOG_DEBUG, "Hangup detected\n");
+				res = -1;
+				break;
+			}
+			f = ast_read(chan);
+			if (!f) {
+				ast_log(LOG_DEBUG, "Null frame == hangup() detected\n");
+				res = -1;
+				break;
+			}
+			if (f->frametype == AST_FRAME_VOICE) {
+				res = write(fds[1], f->data, f->datalen);
+				if (res < 0) {
+					if (errno != EAGAIN) {
+						ast_log(LOG_WARNING, "Write failed to pipe: %s\n", strerror(errno));
+						res = -1;
+						break;
+					}
+				}
+			}
+			ast_frfree(f);
+		}
+	}
+	close(fds[1]);
+	LOCAL_USER_REMOVE(u);
+	if (pid > -1)
+		kill(pid, SIGKILL);
+	if (!res && oreadformat)
+		ast_set_read_format(chan, oreadformat);
+	return res;
+}
+
+int unload_module(void)
+{
+	STANDARD_HANGUP_LOCALUSERS;
+	return ast_unregister_application(app);
+}
+
+int load_module(void)
+{
+	return ast_register_application(app, ices_exec, synopsis, descrip);
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}