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
215 lines
5 KiB
C
215 lines
5 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 Stream to an icecast server via ICES (see contrib/asterisk-ices.xml)
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*
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* \author Mark Spencer <markster@digium.com>
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*
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* \extref ICES - http://www.icecast.org/ices.php
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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 <signal.h>
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#include <fcntl.h>
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#include <sys/time.h>
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#include "asterisk/paths.h" /* use ast_config_AST_CONFIG_DIR */
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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="ICES" language="en_US">
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<synopsis>
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Encode and stream using 'ices'.
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</synopsis>
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<syntax>
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<parameter name="config" required="true">
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<para>ICES configuration file.</para>
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</parameter>
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</syntax>
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<description>
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<para>Streams to an icecast server using ices (available separately).
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A configuration file must be supplied for ices (see contrib/asterisk-ices.xml).</para>
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<note><para>ICES version 2 client and server required.</para></note>
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</description>
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</application>
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***/
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#define path_BIN "/usr/bin/"
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#define path_LOCAL "/usr/local/bin/"
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static char *app = "ICES";
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static int icesencode(char *filename, 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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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, STDIN_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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* But many places has it in /usr/bin
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* As a last-ditch effort, try to use PATH
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*/
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execl(path_LOCAL "ices2", "ices", filename, SENTINEL);
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execl(path_BIN "ices2", "ices", filename, SENTINEL);
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execlp("ices2", "ices", filename, SENTINEL);
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ast_debug(1, "Couldn't find ices version 2, attempting to use ices version 1.");
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execl(path_LOCAL "ices", "ices", filename, SENTINEL);
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execl(path_BIN "ices", "ices", filename, SENTINEL);
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execlp("ices", "ices", filename, SENTINEL);
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ast_log(LOG_WARNING, "Execute of ices failed, could not find command.\n");
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close(fd);
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_exit(0);
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}
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static int ices_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 flags;
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int oreadformat;
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struct timeval last;
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struct ast_frame *f;
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char filename[256]="";
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char *c;
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if (ast_strlen_zero(data)) {
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ast_log(LOG_WARNING, "ICES requires an argument (configfile.xml)\n");
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return -1;
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}
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last = ast_tv(0, 0);
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if (pipe(fds)) {
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ast_log(LOG_WARNING, "Unable to create pipe\n");
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return -1;
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}
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flags = fcntl(fds[1], F_GETFL);
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fcntl(fds[1], F_SETFL, flags | O_NONBLOCK);
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ast_stopstream(chan);
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if (chan->_state != AST_STATE_UP)
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res = ast_answer(chan);
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if (res) {
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close(fds[0]);
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close(fds[1]);
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ast_log(LOG_WARNING, "Answer failed!\n");
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return -1;
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}
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oreadformat = chan->readformat;
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res = ast_set_read_format(chan, AST_FORMAT_SLINEAR);
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if (res < 0) {
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close(fds[0]);
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close(fds[1]);
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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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if (((char *)data)[0] == '/')
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ast_copy_string(filename, (char *) data, sizeof(filename));
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else
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snprintf(filename, sizeof(filename), "%s/%s", ast_config_AST_CONFIG_DIR, (char *)data);
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/* Placeholder for options */
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c = strchr(filename, '|');
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if (c)
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*c = '\0';
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res = icesencode(filename, fds[0]);
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if (res >= 0) {
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pid = res;
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for (;;) {
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/* Wait for audio, and stream */
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ms = ast_waitfor(chan, -1);
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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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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_VOICE) {
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res = write(fds[1], f->data.ptr, f->datalen);
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if (res < 0) {
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if (errno != EAGAIN) {
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ast_log(LOG_WARNING, "Write failed to pipe: %s\n", strerror(errno));
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res = -1;
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ast_frfree(f);
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break;
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}
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}
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}
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ast_frfree(f);
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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 && oreadformat)
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ast_set_read_format(chan, oreadformat);
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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, ices_exec);
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}
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AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Encode and Stream via icecast and ices");
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