Added script to provide ringback when not provided by the called party.

git-svn-id: http://yate.null.ro/svn/yate/trunk@3813 acf43c95-373e-0410-b603-e72c3f656dc1

share/scripts/ringback.php

@@ -0,0 +1,66 @@
+#!/usr/bin/php -q
+<?php
+/* Ringback provider for the Yate PHP interface
+   Add in extmodule.conf
+
+   [scripts]
+   ringback.php=RINGBACK
+
+   where RINGBACK is a wave or autorepeat temporary tone resource like:
+      tone/*ring  (this is the default)
+      wave/play/path/to/custom.au
+*/
+
+require_once("libyate.php");
+
+// A fixed format is needed as we can't know what the called will offer
+$mediafmt = "mulaw";
+
+Yate::Init();
+//Yate::Debug(true);
+
+$ringback = Yate::Arg();
+if ($ringback == "")
+    $ringback = "tone/*ring";
+
+Yate::Install("call.ringing",50);
+Yate::Watch("call.ringing");
+Yate::SetLocal("restart",true);
+
+for (;;) {
+    $ev=Yate::GetEvent();
+    if ($ev === false)
+        break;
+    if ($ev === true)
+        continue;
+    $id = $ev->GetValue("peerid");
+    if ($ev->type == "incoming") {
+	if ($ev->GetValue("earlymedia") == "false" &&
+		$ev->GetValue("rtp_forward") != "yes") {
+	    Yate::Debug("Preparing fake $mediafmt ringback to $id");
+	    $ev->SetParam("earlymedia",true);
+	    $ev->SetParam("formats",$mediafmt);
+	    $ev->SetParam("ringback",$ringback);
+	}
+	$ev->Acknowledge();
+    }
+    else if ($ev->type == "answer") {
+	if ($ev->handled) {
+	    $ring = $ev->GetValue("ringback");
+	    if ($id != "" && $ring != "") {
+		Yate::Debug("Faking ringback $ring to $id");
+		$m = new Yate("chan.masquerade");
+		$m->id = "";
+		$m->SetParam("message","chan.attach");
+		$m->SetParam("id",$id);
+		$m->SetParam("replace",$ring);
+		$m->SetParam("autorepeat",true);
+		$m->SetParam("single",true);
+		$m->Dispatch();
+	    }
+	}
+    }
+}
+
+/* vi: set ts=8 sw=4 sts=4 noet: */
+?>