This patch is the foundation of an entire new way of looking at media in Asterisk. The code present in this patch is everything required to complete phase1 of my Media Architecture proposal. For more information about this project visit the link below. https://wiki.asterisk.org/wiki/display/AST/Media+Architecture+Proposal The primary function of this patch is to convert all the usages of format bitfields in Asterisk to use the new format and format_cap APIs. Functionally no change in behavior should be present in this patch. Thanks to twilson and russell for all the time they spent reviewing these changes. Review: https://reviewboard.asterisk.org/r/1083/ git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@306010 65c4cc65-6c06-0410-ace0-fbb531ad65f3
216 lines
5 KiB
C
216 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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struct ast_format 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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ast_format_clear(&oreadformat);
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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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ast_format_copy(&oreadformat, &chan->readformat);
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res = ast_set_read_format_by_id(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.id)
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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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