Add Icecast streaming support

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

CHANGES

@@ -1,3 +1,5 @@
+ -- Add ices/icecast support
+ -- Numerous bug fixes
 Asterisk 0.7.2
  -- Countless small bug fixes from bug tracker
  -- DSP Fixes

apps/Makefile

@@ -25,7 +25,7 @@ APPS=app_dial.so app_playback.so app_voicemail.so app_directory.so app_mp3.so\
      app_waitforring.so app_privacy.so app_db.so app_chanisavail.so \
      app_enumlookup.so app_transfer.so app_setcidnum.so app_cdr.so \
      app_hasnewvoicemail.so app_sayunixtime.so app_cut.so app_read.so \
-     app_setcdruserfield.so app_random.so
+     app_setcdruserfield.so app_random.so app_ices.so
 
 ifneq (${OSARCH},Darwin)
 APPS+=app_intercom.so

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;
+}

contrib/asterisk-ices.xml

@@ -0,0 +1,93 @@
+<?xml version="1.0"?>
+<ices>
+
+    <!-- run in background  -->
+    <background>0</background>
+    <!-- where logs go. -->
+    <logpath>/var/log/ices</logpath>
+    <logfile>ices.log</logfile>
+    <!-- 1=error, 2=warn, 3=infoa ,4=debug -->
+    <loglevel>4</loglevel>
+    <!-- logfile is ignored if this is set to 1 -->
+    <consolelog>0</consolelog>
+
+    <!-- optional filename to write process id to -->
+    <!-- <pidfile>/home/ices/ices.pid</pidfile> -->
+
+    <stream>
+        <!-- metadata used for stream listing -->
+        <metadata>
+            <name>Example stream name</name>
+            <genre>Example genre</genre>
+            <description>A short description of your stream</description>
+            <url>http://mysite.org</url>
+        </metadata>
+
+        <!--    Input module.
+
+            This example uses the 'oss' module. It takes input from the
+            OSS audio device (e.g. line-in), and processes it for live
+            encoding.  -->
+        <input>
+            <module>stdinpcm</module>
+            <param name="rate">8000</param>
+            <param name="channels">1</param>
+            <!-- Read metadata (from stdin by default, or -->
+            <!-- filename defined below (if the latter, only on SIGUSR1) -->
+            <param name="metadata">1</param>
+            <param name="metadatafilename">test</param>
+        </input>
+
+        <!--    Stream instance.
+
+            You may have one or more instances here.  This allows you to
+            send the same input data to one or more servers (or to different
+            mountpoints on the same server). Each of them can have different
+            parameters. This is primarily useful for a) relaying to multiple
+            independent servers, and b) encoding/reencoding to multiple
+            bitrates.
+
+            If one instance fails (for example, the associated server goes
+            down, etc), the others will continue to function correctly.
+            This example defines a single instance doing live encoding at
+            low bitrate.  -->
+
+        <instance>
+            <!--    Server details.
+
+                You define hostname and port for the server here, along
+                with the source password and mountpoint.  -->
+
+            <hostname>localhost</hostname>
+            <port>8000</port>
+            <password>temppass</password>
+            <mount>/example.ogg</mount>
+            <yp>1</yp>   <!-- allow stream to be advertised on YP, default 0 -->
+
+            <!--    Live encoding/reencoding:
+
+                channels and samplerate currently MUST match the channels
+                and samplerate given in the parameters to the oss input
+                module above or the remsaple/downmix section below.  -->
+
+            <encode>  
+                <quality>0</quality>
+                <samplerate>8000</samplerate>
+                <channels>1</channels>
+            </encode>
+
+            <!-- stereo->mono downmixing, enabled by setting this to 1 -->
+            <downmix>0</downmix>
+
+            <!-- resampling.
+            
+                Set to the frequency (in Hz) you wish to resample to, -->
+             
+            <!-- <resample>
+                <in-rate>44100</in-rate>
+                <out-rate>22050</out-rate>
+            </resample> -->
+        </instance>
+
+    </stream>
+</ices>

doc/README.ices

@@ -0,0 +1,12 @@
+Icecast + Asterisk
+==================
+The advent of icecast into Asterisk allows you to do neat things like have
+a caller stream right into an ice-cast stream as well as using chan_local
+to place things like conferences, music on hold, etc. into the stream.
+
+You'll need to specify a config file for the ices encoder.  An example is
+included in contrib/asterisk-ices.xml
+
+Anyway hope you like it.
+
+Mark