This patch adds 'const' tags to a number of Asterisk APIs where they are appropriate (where the API already demanded that the function argument not be modified, but the compiler was not informed of that fact). The list includes: - CLI command handlers - CLI command handler arguments - AGI command handlers - AGI command handler arguments - Dialplan application handler arguments - Speech engine API function arguments In addition, various file-scope and function-scope constant arrays got 'const' and/or 'static' qualifiers where they were missing. Review: https://reviewboard.asterisk.org/r/251/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@196072 65c4cc65-6c06-0410-ace0-fbb531ad65f3
217 lines
4.7 KiB
C
217 lines
4.7 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Silly application to play an NBScat file -- uses nbscat8k
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \ingroup applications
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*/
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include <fcntl.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <signal.h>
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#include "asterisk/lock.h"
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#include "asterisk/file.h"
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#include "asterisk/channel.h"
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#include "asterisk/frame.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/translate.h"
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#include "asterisk/app.h"
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/*** DOCUMENTATION
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<application name="NBScat" language="en_US">
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<synopsis>
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Play an NBS local stream.
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</synopsis>
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<syntax />
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<description>
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<para>Executes nbscat to listen to the local NBS stream.
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User can exit by pressing any key.</para>
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</description>
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</application>
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***/
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#define LOCAL_NBSCAT "/usr/local/bin/nbscat8k"
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#define NBSCAT "/usr/bin/nbscat8k"
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#ifndef AF_LOCAL
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#define AF_LOCAL AF_UNIX
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#endif
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static char *app = "NBScat";
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static int NBScatplay(int fd)
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{
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int res;
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res = ast_safe_fork(0);
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if (res < 0) {
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ast_log(LOG_WARNING, "Fork failed\n");
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}
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if (res) {
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return res;
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}
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if (ast_opt_high_priority)
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ast_set_priority(0);
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dup2(fd, STDOUT_FILENO);
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ast_close_fds_above_n(STDERR_FILENO);
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/* Most commonly installed in /usr/local/bin */
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execl(NBSCAT, "nbscat8k", "-d", (char *)NULL);
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execl(LOCAL_NBSCAT, "nbscat8k", "-d", (char *)NULL);
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fprintf(stderr, "Execute of nbscat8k failed\n");
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_exit(0);
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}
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static int timed_read(int fd, void *data, int datalen)
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{
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int res;
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struct pollfd fds[1];
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fds[0].fd = fd;
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fds[0].events = POLLIN;
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res = ast_poll(fds, 1, 2000);
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if (res < 1) {
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ast_log(LOG_NOTICE, "Selected timed out/errored out with %d\n", res);
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return -1;
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}
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return read(fd, data, datalen);
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}
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static int NBScat_exec(struct ast_channel *chan, const char *data)
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{
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int res=0;
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int fds[2];
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int ms = -1;
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int pid = -1;
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int owriteformat;
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struct timeval next;
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struct ast_frame *f;
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struct myframe {
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struct ast_frame f;
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char offset[AST_FRIENDLY_OFFSET];
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short frdata[160];
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} myf;
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if (socketpair(AF_LOCAL, SOCK_STREAM, 0, fds)) {
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ast_log(LOG_WARNING, "Unable to create socketpair\n");
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return -1;
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}
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ast_stopstream(chan);
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owriteformat = chan->writeformat;
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res = ast_set_write_format(chan, AST_FORMAT_SLINEAR);
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if (res < 0) {
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ast_log(LOG_WARNING, "Unable to set write format to signed linear\n");
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return -1;
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}
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res = NBScatplay(fds[1]);
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/* Wait 1000 ms first */
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next = ast_tvnow();
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next.tv_sec += 1;
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if (res >= 0) {
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pid = res;
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/* Order is important -- there's almost always going to be mp3... we want to prioritize the
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user */
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for (;;) {
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ms = ast_tvdiff_ms(next, ast_tvnow());
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if (ms <= 0) {
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res = timed_read(fds[0], myf.frdata, sizeof(myf.frdata));
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if (res > 0) {
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myf.f.frametype = AST_FRAME_VOICE;
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myf.f.subclass = AST_FORMAT_SLINEAR;
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myf.f.datalen = res;
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myf.f.samples = res / 2;
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myf.f.mallocd = 0;
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myf.f.offset = AST_FRIENDLY_OFFSET;
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myf.f.src = __PRETTY_FUNCTION__;
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myf.f.delivery.tv_sec = 0;
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myf.f.delivery.tv_usec = 0;
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myf.f.data.ptr = myf.frdata;
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if (ast_write(chan, &myf.f) < 0) {
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res = -1;
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break;
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}
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} else {
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ast_debug(1, "No more mp3\n");
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res = 0;
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break;
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}
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next = ast_tvadd(next, ast_samp2tv(myf.f.samples, 8000));
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} else {
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ms = ast_waitfor(chan, ms);
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if (ms < 0) {
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ast_debug(1, "Hangup detected\n");
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res = -1;
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break;
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}
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if (ms) {
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f = ast_read(chan);
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if (!f) {
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ast_debug(1, "Null frame == hangup() detected\n");
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res = -1;
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break;
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}
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if (f->frametype == AST_FRAME_DTMF) {
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ast_debug(1, "User pressed a key\n");
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ast_frfree(f);
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res = 0;
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break;
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}
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ast_frfree(f);
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}
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}
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}
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}
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close(fds[0]);
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close(fds[1]);
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if (pid > -1)
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kill(pid, SIGKILL);
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if (!res && owriteformat)
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ast_set_write_format(chan, owriteformat);
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return res;
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}
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static int unload_module(void)
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{
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return ast_unregister_application(app);
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}
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static int load_module(void)
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{
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return ast_register_application_xml(app, NBScat_exec);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Silly NBS Stream Application");
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