1 files changed, 104 insertions, 0 deletions
diff --git a/1.4.23-rc4/apps/app_echo.c b/1.4.23-rc4/apps/app_echo.c
new file mode 100644
index 000000000..14f7c6d65
--- /dev/null
+++ b/1.4.23-rc4/apps/app_echo.c
@@ -0,0 +1,104 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Echo application -- play back what you hear to evaluate latency
+ *
+ * \author Mark Spencer <markster@digium.com>
+ * 
+ * \ingroup applications
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+#include "asterisk/lock.h"
+#include "asterisk/file.h"
+#include "asterisk/logger.h"
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/module.h"
+
+static char *app = "Echo";
+
+static char *synopsis = "Echo audio, video, or DTMF back to the calling party";
+
+static char *descrip = 
+"  Echo(): This application will echo any audio, video, or DTMF frames read from\n"
+"the calling channel back to itself. If the DTMF digit '#' is received, the\n"
+"application will exit.\n";
+
+
+static int echo_exec(struct ast_channel *chan, void *data)
+{
+	int res = -1;
+	int format;
+	struct ast_module_user *u;
+
+	u = ast_module_user_add(chan);
+
+	format = ast_best_codec(chan->nativeformats);
+	ast_set_write_format(chan, format);
+	ast_set_read_format(chan, format);
+
+	while (ast_waitfor(chan, -1) > -1) {
+		struct ast_frame *f = ast_read(chan);
+		if (!f)
+			break;
+		f->delivery.tv_sec = 0;
+		f->delivery.tv_usec = 0;
+		if (ast_write(chan, f)) {
+			ast_frfree(f);
+			goto end;
+		}
+		if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
+			res = 0;
+			ast_frfree(f);
+			goto end;
+		}
+		ast_frfree(f);
+	}
+end:
+	ast_module_user_remove(u);
+	return res;
+}
+
+static int unload_module(void)
+{
+	int res;
+
+	res = ast_unregister_application(app);
+
+	ast_module_user_hangup_all();
+
+	return res;
+}
+
+static int load_module(void)
+{
+	return ast_register_application(app, echo_exec, synopsis, descrip);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple Echo Application");