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00028 #include "asterisk.h"
00029
00030 ASTERISK_FILE_VERSION(__FILE__, "$Revision: 103249 $")
00031
00032 #include "asterisk/file.h"
00033 #include "asterisk/module.h"
00034 #include "asterisk/channel.h"
00035
00036 static char *app = "Echo";
00037
00038 static char *synopsis = "Echo audio, video, or DTMF back to the calling party";
00039
00040 static char *descrip =
00041 " Echo(): This application will echo any audio, video, or DTMF frames read from\n"
00042 "the calling channel back to itself. If the DTMF digit '#' is received, the\n"
00043 "application will exit.\n";
00044
00045
00046 static int echo_exec(struct ast_channel *chan, void *data)
00047 {
00048 int res = -1;
00049 int format;
00050
00051 format = ast_best_codec(chan->nativeformats);
00052 ast_set_write_format(chan, format);
00053 ast_set_read_format(chan, format);
00054
00055 while (ast_waitfor(chan, -1) > -1) {
00056 struct ast_frame *f = ast_read(chan);
00057 if (!f)
00058 break;
00059 f->delivery.tv_sec = 0;
00060 f->delivery.tv_usec = 0;
00061 if (ast_write(chan, f)) {
00062 ast_frfree(f);
00063 goto end;
00064 }
00065 if ((f->frametype == AST_FRAME_DTMF) && (f->subclass == '#')) {
00066 res = 0;
00067 ast_frfree(f);
00068 goto end;
00069 }
00070 ast_frfree(f);
00071 }
00072 end:
00073 return res;
00074 }
00075
00076 static int unload_module(void)
00077 {
00078 return ast_unregister_application(app);
00079 }
00080
00081 static int load_module(void)
00082 {
00083 return ast_register_application(app, echo_exec, synopsis, descrip);
00084 }
00085
00086 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Simple Echo Application");