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/*
* 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 Silly application to play an NBScat file -- uses nbscat8k
*
* \author Mark Spencer <markster@digium.com>
*
* \ingroup applications
*/
/*** MODULEINFO
<support_level>extended</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision: 356573 $")
#include <fcntl.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <signal.h>
#include "asterisk/lock.h"
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/frame.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/translate.h"
#include "asterisk/app.h"
/*** DOCUMENTATION
<application name="NBScat" language="en_US">
<synopsis>
Play an NBS local stream.
</synopsis>
<syntax />
<description>
<para>Executes nbscat to listen to the local NBS stream.
User can exit by pressing any key.</para>
</description>
</application>
***/
#define LOCAL_NBSCAT "/usr/local/bin/nbscat8k"
#define NBSCAT "/usr/bin/nbscat8k"
#ifndef AF_LOCAL
#define AF_LOCAL AF_UNIX
#endif
static char *app = "NBScat";
static int NBScatplay(int fd)
{
int res;
res = ast_safe_fork(0);
if (res < 0) {
ast_log(LOG_WARNING, "Fork failed\n");
}
if (res) {
return res;
}
if (ast_opt_high_priority)
ast_set_priority(0);
dup2(fd, STDOUT_FILENO);
ast_close_fds_above_n(STDERR_FILENO);
/* Most commonly installed in /usr/local/bin */
execl(NBSCAT, "nbscat8k", "-d", (char *)NULL);
execl(LOCAL_NBSCAT, "nbscat8k", "-d", (char *)NULL);
fprintf(stderr, "Execute of nbscat8k failed\n");
_exit(0);
}
static int timed_read(int fd, void *data, int datalen)
{
int res;
struct pollfd fds[1];
fds[0].fd = fd;
fds[0].events = POLLIN;
res = ast_poll(fds, 1, 2000);
if (res < 1) {
ast_log(LOG_NOTICE, "Selected timed out/errored out with %d\n", res);
return -1;
}
return read(fd, data, datalen);
}
static int NBScat_exec(struct ast_channel *chan, const char *data)
{
int res=0;
int fds[2];
int ms = -1;
int pid = -1;
struct ast_format owriteformat;
struct timeval next;
struct ast_frame *f;
struct myframe {
struct ast_frame f;
char offset[AST_FRIENDLY_OFFSET];
short frdata[160];
} myf;
ast_format_clear(&owriteformat);
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds)) {
ast_log(LOG_WARNING, "Unable to create socketpair\n");
return -1;
}
ast_stopstream(chan);
ast_format_copy(&owriteformat, ast_channel_writeformat(chan));
res = ast_set_write_format_by_id(chan, AST_FORMAT_SLINEAR);
if (res < 0) {
ast_log(LOG_WARNING, "Unable to set write format to signed linear\n");
return -1;
}
res = NBScatplay(fds[1]);
/* Wait 1000 ms first */
next = ast_tvnow();
next.tv_sec += 1;
if (res >= 0) {
pid = res;
/* Order is important -- there's almost always going to be mp3... we want to prioritize the
user */
for (;;) {
ms = ast_tvdiff_ms(next, ast_tvnow());
if (ms <= 0) {
res = timed_read(fds[0], myf.frdata, sizeof(myf.frdata));
if (res > 0) {
myf.f.frametype = AST_FRAME_VOICE;
ast_format_set(&myf.f.subclass.format, AST_FORMAT_SLINEAR, 0);
myf.f.datalen = res;
myf.f.samples = res / 2;
myf.f.mallocd = 0;
myf.f.offset = AST_FRIENDLY_OFFSET;
myf.f.src = __PRETTY_FUNCTION__;
myf.f.delivery.tv_sec = 0;
myf.f.delivery.tv_usec = 0;
myf.f.data.ptr = myf.frdata;
if (ast_write(chan, &myf.f) < 0) {
res = -1;
break;
}
} else {
ast_debug(1, "No more mp3\n");
res = 0;
break;
}
next = ast_tvadd(next, ast_samp2tv(myf.f.samples, 8000));
} else {
ms = ast_waitfor(chan, ms);
if (ms < 0) {
ast_debug(1, "Hangup detected\n");
res = -1;
break;
}
if (ms) {
f = ast_read(chan);
if (!f) {
ast_debug(1, "Null frame == hangup() detected\n");
res = -1;
break;
}
if (f->frametype == AST_FRAME_DTMF) {
ast_debug(1, "User pressed a key\n");
ast_frfree(f);
res = 0;
break;
}
ast_frfree(f);
}
}
}
}
close(fds[0]);
close(fds[1]);
if (pid > -1)
kill(pid, SIGKILL);
if (!res && owriteformat.id)
ast_set_write_format(chan, &owriteformat);
return res;
}
static int unload_module(void)
{
return ast_unregister_application(app);
}
static int load_module(void)
{
return ast_register_application_xml(app, NBScat_exec);
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Silly NBS Stream Application");
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